<!-- MVIP CHÍNH THỨC 14/10/2026: sửa bố cục các ý a/b/c xen giữa phương trình hoá học, giữ nguồn PPTX không đổi. -->
<!-- MVIP CHÍNH THỨC 14/10/2026: đọc khoảng cách dòng PowerPoint và xử lý nhóm hiệu ứng mở đầu cho câu hỏi ĐÚNG/SAI. -->
<!-- MVIP CHÍNH THỨC 14/10/2026: xử lý animClr(fillcolor) và set(fill.on/type) cho hiệu ứng PowerPoint, giữ bộ dựng ổn định. -->
<!-- MVIP CHÍNH THỨC 14/10/2026: giữ xử lý bảng PowerPoint theo hệ tọa độ toàn bảng, tránh dồn hàng. -->
<!-- 13/10/2026: Form 1 Soạn đề: lề trên 720 twip và Header 360 twip, đồng bộ Trộn đề. -->
<!-- MVIP THỬ NGHIỆM 2026-10-13: Soạn đề kiểm tra Form 1 dùng bố cục đầu trang giống Trộn đề Form 1, khung X trang 2 đúng kích thước mẫu Trộn đề 4 cm, không đổi các form khác. -->
<!-- 2026-10-13 thử nghiệm: Form 1 Trộn đề: khung X trang 2 cao đúng 4cm, phía dưới dành 1cm cắt phách không viền và không có nét chéo. Soạn đề kiểm tra giữ 5,5cm; các form khác giữ nguyên. -->
<!-- Form 1: giữ cơ chế Word tự dàn và khung cắt phách trong Header trang 2; khả năng dàn trang vẫn phụ thuộc phiên bản Word. -->
<!-- 2026-10-13: Ma trận Soạn đề kiểm tra: 2 dòng Tổng số điểm/Tỷ lệ % gộp mỗi nhóm Nhiều lựa chọn, Đúng-Sai, Trả lời ngắn, Tự luận thành 1 ô colspan=4; giữ 4 ô Tổng theo mức độ và Tổng số câu. -->
<!-- MVIP bản thử nghiệm 13/10/2026: Ma trận kiểm tra / đề cương 4 cột Tổng Biết-Hiểu-VD-VDC, thu hẹp 2 cột chữ; Word export đồng bộ; giữ bản PowerPoint KHÔNG có ô nét đứt. -->
<!-- MVIP thử nghiệm 2026-10-13: khôi phục ký hiệu đồng vị m:sPre trong bảng và tránh ảnh slide phủ toàn trang bị lệch/cắt do placeholder. -->
<!-- MVIP THỬ NGHIỆM 2026-10-13: Nút mũi tên phải chỉ chuyển câu/slide; không tự bật toàn màn hình. Fullscreen chỉ đổi qua nút mở rộng hoặc thao tác chuyên dụng. Giữ nguyên tính năng chuyển tài khoản Remote. -->
<!-- MVIP 2026-10-12 BẢN THỬ NGHIỆM: khi đổi tài khoản PC, ngắt WebSocket/DataChannel cũ và kết nối remote bằng token mới, không cần Ctrl+F5. Giữ nguyên server.py, ứng dụng di động và các tính năng khác. -->
<!-- MVIP THỬ NGHIỆM 2026-10-13 - Form 1 tối ưu lấp trang đầu:
- Bỏ giới hạn cứng 5 câu và khoản dự phòng 4.200 twip khiến trang đầu bị trống nhiều.
- Ước lượng theo chiều cao thực: đoạn, đáp án, bảng và hình; chỉ chừa dự phòng nhỏ.
- Vẫn ngắt trang chủ động trước khung X, đưa khung lên đầu trang 2.
- Không thay đổi cách xuất Form 2-5 và chức năng khác.
-->
<!-- MVIP THỬ NGHIỆM 2026-10-13 - Form 1: khung cắt phách gạch chéo luôn được đặt ngay đầu trang 2.
- Dừng đưa câu hỏi lên trang 1 sớm hơn (trừ hao độ cao công thức, bảng, hình).
- Chỉ chèn ngắt trang một lần trước khung; khung nằm trên đầu trang mới, không bị nội dung đẩy xuống.
- Nếu ít câu: vẫn có trang 2 với khung mặt sau phách; Form 2/3/4/5 không thay đổi.
-->
<!-- MVIP Hybrid thử nghiệm 2026-10-10: giới hạn 40 câu/ô cho mọi bảng chọn số câu. Giữ 40 câu/lần (kiểm tra, dùng câu hỏi MVIP), 200 câu/lần (đề cương); giữ nguyên WebRTC. -->
<!-- MVIP 2026-10-09 v16:
Dựa lại trực tiếp trên v13. Sửa gốc lỗi Đúng-Sai của một số file Toán 8:
đọc word/numbering.xml và khôi phục nhãn a)/b)/c)/d) do Word tạo bằng Automatic Numbering.
KHTN7 có nhãn a)/b)/c)/d) gõ trực tiếp nên giữ nguyên cách hiển thị cũ.
Không dùng các vá suy đoán v14/v15.
-->
<!-- MVIP 2026-10-09 v13 - Remote ngủ khi không dùng:
- Khi chưa có thao tác từ điện thoại: bỏ hoàn toàn vòng quét DOM Remote 10 giây.
- WebSocket chỉ giữ vai trò "tai nghe" rất nhẹ + heartbeat 60 giây để điện thoại vẫn gọi được máy tính.
- Trạng thái chỉ cập nhật theo sự kiện thật trên máy tính; không polling DOM nền.
- Khi nhận lệnh/presence từ điện thoại: Remote thức đầy đủ, bật kiểm tra dự phòng 10 giây trong 10 phút.
- Sau 10 phút không có hoạt động điện thoại: tự quay về chế độ ngủ.
-->
<!-- MVIP thử nghiệm 2026-10-09 v12 - tối ưu điều khiển điện thoại:
- Vòng kiểm tra trạng thái Remote: 1 giây -> 10 giây.
- Heartbeat WebSocket: 25 giây -> 60 giây.
- Các thao tác bấm nút/fullscreen/focus vẫn gửi trạng thái ngay như cũ.
Mục tiêu: giảm tải CPU trình duyệt và số gói tin tới máy chủ, không thay đổi cách sử dụng.
-->
<!-- MVIP thử nghiệm 2026-10-08 v11:
Sửa riêng Trình chiếu câu hỏi Word/Bài giảng với NDTC chỉ có tiêu đề + 1 hình.
Không dùng bố cục media-layout-figure 2 cột. Giữ tiêu đề ở hàng trên, ảnh ở hàng dưới,
ảnh giữ nguyên tỉ lệ và tự phóng tối đa trong toàn bộ vùng còn lại.
-->
<!-- MVIP thử nghiệm 2026-10-08 v6: sửa dứt điểm MathType PE kiểu cũ. MTEF CHAR có embellishment được đọc hết thay vì dừng sớm ở END; embMBAR trên ngoặc polymer được dựng thành liên kết -(...)- thay vì overline/đốm đen. -->
<!-- MVIP thử nghiệm 2026-10-08 v5: sửa ô MathType PE còn lỗi. Loại TeX/MTEF bị cắt (ngoặc không cân bằng) và cho EMF MathType dự phòng dựng đúng TA_UPDATECP + khoảng cách DX từng ký tự; sửa Symbol PUA như dấu trừ. -->
<!-- MVIP thử nghiệm 2026-10-08 v4: PowerPoint MathType/Equation.DSMT4 được dựng trước EMF; sau khi dựng PNG công thức, đưa ảnh dự phòng ra p:pic trực tiếp để renderer không làm méo CH2, dấu =, ngoặc, chỉ số và liên kết polymer. -->
<!-- MVIP sửa 2026-10-08 v3: PowerPoint orbital AO được raster thành 1 ảnh PNG trong suốt theo đúng khung/mũi tên gốc trước khi trình chiếu; tránh renderer làm mất ô cuối, cạnh phải hoặc mũi tên. -->
<!-- Remote v45: điện thoại điều khiển Đáp án/Đóng/Chia đôi và từng ý a/b/c/.../Tất cả trong câu hỏi tương tác. -->
<!-- MVIP sửa 2026-10-07: Đúng-Sai nhận đáp án dạng "Đáp án: a) Đ; b) Đ; c) S; d) S" (cũng nhận a:/a./a-). Khi chưa nhận diện được đáp án, giữ trống và không tự gán Sai trong các bước đảo ý/quét. -->
<!-- MVIP v44 - điều chỉnh 2026-10-07: bố cục danh sách học sinh theo sĩ số.
- Lớp <= 60 học sinh: 3 cột, danh sách 30vw, trình chiếu 70vw.
- Lớp > 60 học sinh: 4 cột, danh sách 40vw, trình chiếu 60vw.
- Giữ nguyên thanh Kết quả quét - ← - → - X và các chức năng khác.
-->
<!-- Bản thử nghiệm 2026-10-07: PowerPoint WMV/ASF chuyển cục bộ trên máy người dùng bằng ffmpeg.wasm + cache IndexedDB; không tải video lên máy chủ. -->
<!-- MVIP Remote v35 - 2026-10-05
Android: giữ a/b/c/d chữ thường; bố cục điện thoại đủ 5 hàng để luôn thấy Đáp án + Vòng quay.
Web logic Đúng-Sai giữ nguyên v34.
-->
<!-- MVIP Remote v31 - 2026-10-05:
- Khắc phục lỗi hiếm Vòng quay bị kẹt ở trạng thái “Đang quay…” trong nhiều phút.
- Thêm watchdog 7 giây và bộ tự phục hồi theo thời gian thực. Nếu animation/callback của Chrome không kết thúc, MVIP bắt buộc chốt đúng học sinh đã chọn và chuyển sang trạng thái Đóng.
- Khi cửa sổ lấy lại focus/visibility hoặc Remote kiểm tra trạng thái, vòng quay quá hạn cũng được tự phục hồi.
- Không thay đổi server.py và không cần build lại APK Android.
-->
<!-- MVIP Remote v30 - 2026-10-05:
- Trên điện thoại bỏ nút Mở rộng/Thu nhỏ trong màn hình câu hỏi/tài liệu, thay bằng Vòng quay.
- Bấm Vòng quay -> máy tính mở Vòng quay may mắn, điện thoại đổi thành Quay.
- Khi quay xong chọn được học sinh -> điện thoại đổi thành Đóng.
- Bấm Đóng -> điện thoại trở lại nút Vòng quay.
- Không thay đổi server.py và không cần build lại APK Android vì bộ nút remote do index.html gửi động.
-->
<!-- MVIP - ĐIỀU KHIỂN ĐỒNG BỘ BẰNG ĐIỆN THOẠI - 2026-10-05
- Kết nối WebSocket riêng /api/ws/remote, chỉ gửi trạng thái/lệnh nhỏ khi thay đổi.
- MVIP ScanQuiz tự đổi bộ nút theo màn hình: Câu hỏi / PowerPoint / Tài liệu / Bảng trắng.
- Không truyền hình ảnh màn hình, không polling máy chủ liên tục.
-->
<!-- Bản thử nghiệm v44 - chỉnh remote PowerPoint + vị trí Kết quả quét ngày 2026-10-06. -->
<!-- PHIÊN BẢN THỬ NGHIỆM - cập nhật 2026-10-05:
Trộn đề đổi thứ tự mục:
1. Tải đề lên
2. Thông tin trên đề
3. Chọn form làm trực tiếp trên đề
4. Chọn form không làm trực tiếp trên đề
5. Số mã đề
-->
<!-- Bản thử nghiệm 2026-10-05 - Trộn đề:
1) Mở rộng cột điều khiển bên trái thêm khoảng 3 cm.
2) Mục 1,2,3,4,5 được đóng khung viền xanh rõ ràng.
3) Bỏ ghi chú phụ dưới mục Thông tin trên đề.
4) Đổi Form 2 -> "Form 2. Đơn giản".
5) Đổi Form 4 -> "Form 4. Đơn giản".
-->
<!--
MVIP - PHIÊN BẢN THỬ NGHIỆM
URL dự kiến: https://mvip.vn/thu-nghiem/
Bản này được tạo trực tiếp từ bản chính thức mới nhất và giữ nguyên toàn bộ thay đổi.
Không dùng để thay thế bản chính thức trên mvip.vn trước khi kiểm thử ổn định.
-->
<!-- MVIP - BẢN CHÍNH THỨC 2026-10-04
Sửa lại chức năng "Mỗi mã đề có số trang là số chẵn":
- Không dùng oddPage nữa vì khi mỗi section khởi động lại số trang từ 1,
  Word vẫn có thể chuyển ngay sang mã đề kế tiếp và SECTIONPAGES vẫn báo 3/3.
- MVIP ước lượng số trang thực của từng mã đề theo chính chiều cao các khối câu hỏi.
- Nếu mã đề được ước lượng kết thúc ở trang lẻ, MVIP chủ động chèn một trang trắng
  VÀO TRONG section của mã đề trước khi sang mã đề sau.
- Trang trắng vì vậy được tính vào SECTIONPAGES, có cùng footer mã đề và trở thành
  trang chẵn cuối cùng (ví dụ 3/3 -> thêm trang trắng -> 4/4).
-->
<!-- MVIP - BẢN CHÍNH THỨC 2026-10-04
Bổ sung tùy chọn cho Soạn đề kiểm tra:
"Mỗi mã đề có số trang là số chẵn".
Khi bật:
- mỗi mã đề vẫn đánh số trang lại từ 1;
- section của mã đề kế tiếp bắt đầu ở trang lẻ;
- nếu mã đề trước kết thúc ở trang lẻ, Microsoft Word tự chèn một trang trắng
  vào cuối mã đề đó để mã đề kết thúc ở trang chẵn;
- chuyển từ mã đề cuối sang phần đáp án cũng dùng ngắt section trang lẻ,
  nên mã đề cuối cũng được bù trang trắng khi cần.
-->
<!-- MVIP - BẢN CHÍNH THỨC 2026-10-04
Sửa xuất Word của "Soạn đề kiểm tra":
1) Bổ sung footer cho từng mã đề: trái "Mã đề XX", phải "Trang PAGE/SECTIONPAGES".
   Mỗi mã đề là một section riêng và số trang bắt đầu lại từ 1.
2) Form 1: khung chữ nhật gạch chéo của mặt sau phách được ép bắt đầu đúng
   đầu trang 2. Sau khung để trống đúng 2 dòng rồi mới tiếp tục nội dung đề.
3) Tăng vùng an toàn khi ước lượng trang 1 để tránh Word tự đẩy câu hỏi sang
   trang 2 trước khung cắt phách.
-->
<!-- MVIP - BẢN CHÍNH THỨC 2026-10-03
Chuyển từ bản thử nghiệm mới nhất, giữ nguyên toàn bộ chức năng đã chỉnh.
Môi trường: production.
-->
<!-- Bản sửa 2026-10-03:
Khi chọn "Lựa chọn 1. Sinh 01 đề duy nhất":
- Các form có dòng "Họ và tên:" hiển thị "Họ và tên: ..............".
- Dòng "Lớp:" hiển thị "Lớp: .......".
- Áp dụng đồng thời ở vùng Xem trước đề và file Word xuất ra.
Lựa chọn 2/3 vẫn tự điền tên học sinh và lớp như trước.
-->
<!-- Bản sửa 2026-10-03:
1) "Lựa chọn cách sinh đề": nút "Xuất đề Word" đổi thành "Tiếp theo".
2) "Chọn form đề Word" đổi thành "Nhập thông tin trên đề và chọn form".
3) Tên đề không nhập lại trong bảng form; tự lấy đúng Tên đề đã chọn/nhập ở Bước 2.
4) Môn tự lấy từ Lớp-Môn ở Bước 1; ví dụ "Toán - 9A" -> "MÔN: Toán 9".
5) Nút cuối đổi "OK" thành "Xuất đề" và chuyển xuống ngay dưới khung
   "3. Chọn form không làm trực tiếp trên đề" ở cột bên trái.
-->
<!-- Bản sửa 2026-10-03:
Khắc phục lỗi nút "Biên soạn ma trận" không mở được.
Nguyên nhân: khung "1. Thông tin trên đề" thiếu thẻ đóng </div>, làm
cv7991MatrixModal bị lồng bên trong cv7991WordTemplateModal đang hidden.
Đã đóng đúng khung để MatrixModal trở lại cùng cấp như trước.
-->
<!-- Bản sửa 2026-10-03 - Chọn form đề Word:
1) Mở rộng cột chọn form thêm khoảng 2 cm.
2) Xem trước đề chỉ hiển thị những loại câu đã được chọn trong ma trận:
   Nhiều lựa chọn / Đúng-Sai / Trả lời ngắn / Tự luận.
   Chỉ khi ma trận có Tự luận và đang chọn Form 1/2/3 mới hiện ô "Số dòng viết tự luận".
3) Tách phần thông tin đề thành khung riêng đầu tiên: "1. Thông tin trên đề".
4) Đổi tiêu đề nhóm:
   "2. Chọn form làm trực tiếp trên đề"
   "3. Chọn form không làm trực tiếp trên đề"
5) Đổi nhãn:
   Form 1. Đầy đủ, cắt phách
   Form 2. Đơn giản
   Form 3. Gọn, không cắt phách
   Form 4. Đơn giản
   Form 5. Gọn
-->
<!-- Bản sửa 2026-10-03 - Chọn form đề Word:
1) Tên đề trong bảng Chọn form đề Word được kiểm tra trùng với hệ thống tên đề ở Bước 2.
   Khi bấm OK, tên đề được đồng bộ về Bước 2; nếu đang xuất lại một đề đã sinh thì tên đề
   của cấu hình lớp-môn tương ứng cũng được cập nhật trên hệ thống.
2) Các ô Tên đơn vị/Sở, Tên trường, Tên đề, Năm học, Thời gian làm bài chuyển thành 1 cột.
3) Đổi Form 2 thành "Form 2. Đơn giản".
4) Đổi Form 4 thành "Form 4. Đơn giản".
5) Thu hẹp cột điều khiển và mở rộng vùng Xem trước đề.
-->
<!-- Bản sửa 2026-10-03 - Chọn form đề Word:
- Sửa nguyên nhân modal chưa full màn hình: CSS gốc .cv7991-action-modal có padding-top:10vh.
- Riêng cv7991WordTemplateModal được ép inset 0, padding 0, dialog 100vw x 100vh.
- Hai nhóm form được đóng khung rõ ràng:
  + Làm trực tiếp trên đề: từ tiêu đề đến hết Số dòng viết tự luận.
  + Không làm trực tiếp trên đề: từ tiêu đề đến hết Form 5.
-->
<!-- Bản sửa 2026-10-03 - Soạn đề kiểm tra / Chọn form đề Word:
- Bổ sung Form 4, Form 5 giống quy ước bên Trộn đề.
- Form 1/2/3 làm trực tiếp trên đề; Form 4/5 không làm trực tiếp trên đề.
- Form 4 dùng bố cục đầu đề như Form 2; Form 5 dùng bố cục đầu đề như Form 3.
- Form 4/5: Đúng-Sai không kẻ bảng, Trả lời ngắn không có dòng "Trả lời: ...".
- Form 1/2/3 có ô chọn số dòng viết tự luận; cuối đề thêm "BÀI LÀM PHẦN TỰ LUẬN".
- Vùng xem trước cập nhật trực tiếp đủ 5 form.
-->
<!-- Bản sửa 2026-10-03 - Soạn đề kiểm tra / Chọn form đề Word:
- Bảng "Chọn form đề Word" mở rộng gần full màn hình.
- Bên trái giữ phần chọn Form 1/2/3 và các ô thông tin.
- Bên phải có vùng "Xem trước đề" giống cách bố trí của Trộn đề.
- Đổi Form 1/2/3 hoặc nhập Tên đề / Sở / Trường / Năm học / Thời gian đến đâu,
  vùng xem trước cập nhật ngay đến đó.
- Nếu đã có đề sinh sẵn thì xem trước chính nội dung đề; nếu chưa sinh thì dùng nội dung mẫu
  để người dùng vẫn nhìn rõ bố cục form trước khi bấm OK.
-->
<!-- Bản sửa 2026-10-03 - Chờ xuất đề Word:
Khi bấm OK ở bảng "Chọn form đề Word":
- hiện lớp thông báo "Đang xuất đề" ở giữa màn hình;
- 3 dấu chấm chạy liên tục bằng CSS animation;
- giữ thông báo cho tới khi xuất xong hoặc có lỗi;
- chờ browser vẽ thông báo trước khi bắt đầu xử lý xuất Word.
-->
<!-- Bản sửa 2026-10-03 - PowerPoint bảng ô AO:
Khắc phục các bảng 1 hàng rỗng dùng để vẽ ô orbital s/p/d/f.
Bộ dựng web có thể làm mất ô cuối của bảng PowerPoint, nên trước khi trình chiếu:
- nhận diện riêng bảng rỗng 1/3/5/7 ô có tỷ lệ gần hình vuông;
- chuyển bảng thành một group DrawingML gồm khung ngoài + các vạch chia;
- giữ nguyên id đối tượng, vị trí, kích thước và animation target của PowerPoint.
-->
<!-- Bản sửa 2026-10-02:
1) Bỏ dòng mô tả dưới tiêu đề "Trộn đề".
2) Nút "Trộn đề" ngoài trang chủ có nền xanh ngọc, chữ trắng.
3) Cập nhật nội dung "Hướng dẫn soạn đề gốc" theo quy ước mới:
   - MC: gạch chân A / bôi đỏ B / Đáp án: A...
   - Đúng-Sai: gạch chân a / bôi đỏ b / Đáp án: a: Đ; b: Đ; c: S; d: S
   - Trả lời ngắn/Tự luận: Đáp án: hoặc Trả lời:
-->
<!-- Bản sửa 2026-10-02:
1) Dòng viết tự luận kéo dài đúng đến lề phải của vùng văn bản.
   Khi xuất Word dùng tab leader dấu chấm tới đúng lề phải; giãn dòng 1,5 lines.
2) Bỏ Form 4 cũ.
   Form 5 cũ đổi thành Form 4.
   Form 6 cũ đổi thành Form 5.
   Tổng cộng còn 5 form và chỉ chọn được 1 form.
-->
<!-- Bản sửa 2026-10-02:
- Mục 4 và mục 5 chỉ là tiêu đề, luôn hiển thị đầy đủ.
- Mục 4 luôn hiện Form 1, Form 2, Form 3 + ô Số dòng viết tự luận.
- Mục 5 luôn hiện Form 4, Form 5, Form 6.
- Cả 6 form dùng chung một nhóm radio examMixerForm nên loại trừ nhau tuyệt đối:
  chỉ có thể chọn 1 trong 6 form.
- Bỏ cơ chế đóng/mở mục 4/5 và bỏ radio chọn nhóm.
-->
<!-- Bản sửa 2026-10-02:
Khắc phục mục 4 và mục 5 ở Trộn đề bị co thành đường mảnh/không thấy chữ.
- Không dùng label bao ngoài nữa để tránh CSS chung của trang làm co label.
- Dùng div tiêu đề có chiều cao tối thiểu, chữ và radio luôn hiện.
- Bấm vào toàn bộ dòng tiêu đề để chọn/mở nhóm.
-->
<!-- Bản sửa 2026-10-02 - Trộn đề:
1) Mục 4 đổi thành "Chọn form làm trực tiếp trên đề"; có ô nhập số dòng viết tự luận.
   Form 1/2/3 là nhóm làm trực tiếp trên đề.
2) Cuối mỗi mã đề của form 1/2/3, nếu có câu tự luận, thêm:
   "BÀI LÀM PHẦN TỰ LUẬN" + số dòng chấm theo người dùng nhập.
3) Thêm mục 5 "Chọn form không làm trực tiếp trên đề", gồm form 4/5/6.
   Form 4/5/6 dùng bố cục đầu trang tương ứng form 1/2/3.
4) Ở form 4/5/6:
   - Đúng/Sai không kẻ bảng; mỗi ý a/b/c/d là một đoạn.
   - Trả lời ngắn không có dòng "Trả lời: ........".
   - Không thêm vùng "BÀI LÀM PHẦN TỰ LUẬN".
5) Người dùng chỉ chọn một trong hai nhóm 4 hoặc 5. Nhóm đang chọn mới mở các form con.
-->
<!-- Bản sửa 2026-10-02 - Trộn đề xem trước đề gốc:
1) Ngay sau khi Tải đề lên và đọc xong, vùng xem trước hiển thị luôn Đề gốc.
2) Trước khi bấm Trộn đề, bộ chọn mã đề hiển thị "Đề gốc" và bị khóa.
3) Người dùng nhập "Thông tin trên đề" đến đâu, vùng xem trước cập nhật ngay đến đó.
4) Chỉ sau khi bấm "Trộn đề" mới chuyển sang chế độ hiện các Mã đề 01/02/... như hiện tại.
-->
<!-- Bản sửa 2026-10-02 - Cài đặt điểm số: tăng toàn bộ cỡ chữ lên 1,5 lần. -->
<!-- Bản sửa 2026-10-02 - Cài đặt điểm số Soạn đề kiểm tra:
- Đúng - Sai có 2 lựa chọn chấm điểm, mặc định Lựa chọn 1.
  + Lựa chọn 1: đúng 1/2/3/4 ý = 0,1 / 0,25 / 0,5 / 1 điểm.
  + Lựa chọn 2: mỗi ý đúng = 0,25 điểm (1/2/3/4 ý = 0,25 / 0,5 / 0,75 / 1 điểm).
- Trả lời ngắn có combo 0,25 / 0,5 / 1 điểm mỗi câu, mặc định 0,5.
- Tổng điểm, cấu hình lưu và chấm quét đều dùng đúng lựa chọn hiện tại.
-->
<!-- Bản sửa 2026-10-02 - EMF text scale:
Sửa nguyên nhân gốc làm OH/NH2 chồng chữ:
font EMF trước đây chỉ áp dụng worldTransform mà bỏ qua tỉ lệ WindowExt/ViewportExt.
Vì vậy chữ Arial trong ChemSketch bị phóng lớn khoảng 3 lần so với tọa độ vòng benzen.
Bản này áp dụng đúng tỉ lệ viewport/window cho cỡ chữ EMF.
-->
<!-- Bản sửa 2026-10-02 - PowerPoint ChemSketch/EMF v3:
- Dùng chính bộ chuyển EMF đã ổn định của viewer Word (cv7991ConvertLegacyPresenterImage)
  thay vì bộ chuyển riêng của PowerPoint.
- Bộ này tự siết khung SVG theo phần mực thật, nên loại được trang trắng lớn của ChemSketch.
- OLE graphicFrame vẫn được thay bằng p:pic trực tiếp để renderer PowerPoint web nhìn thấy.
-->
<!-- Bản sửa 2026-10-02 - PowerPoint ChemSketch/EMF v2:
- Ảnh vòng benzen trong file mẫu là EMF nằm bên trong OLE graphicFrame.
- Sau khi đổi EMF -> PNG, tự crop phần trắng thừa để cấu trúc hóa học lấp đúng khung.
- Thay OLE graphicFrame bằng p:pic trực tiếp dùng ảnh PNG, giữ nguyên x/y/cx/cy của PowerPoint.
- Dấu tích Wingdings vẫn giữ bản sửa ✓ Unicode.
-->
<!-- Bản sửa 2026-10-02 - Trình chiếu PowerPoint:
1) Wingdings U+F0FC trong PowerPoint được đổi thành dấu ✓ Unicode, không còn ô vuông.
2) Ảnh EMF trong slide PowerPoint (ví dụ vòng benzen/ChemDraw) được dựng bằng bộ EMF nhúng,
   raster hóa thành PNG sắc nét ngay trong trình duyệt rồi thay vào gói PPTX tạm trước khi trình chiếu.
3) Giữ nguyên tọa độ/kích thước của p:pic gốc.
-->
<!-- Bản sửa 2026-10-02 - Đáp án Soạn đề kiểm tra:
Nếu phần mềm KHÔNG nhận diện chắc chắn được đáp án của câu trắc nghiệm
(do người dùng chưa soạn đáp án hoặc soạn sai định dạng), ô đáp án tương ứng
chỉ hiển thị chữ X màu đỏ. Tuyệt đối không dùng đáp án mặc định A/Đ/S hay ký tự khác.
Áp dụng cho Nhiều lựa chọn, Đúng-Sai và Trả lời ngắn.
-->
<!-- Bản sửa 2026-10-02:
Sửa lại footer của từng file mã đề theo đúng cấu trúc OOXML:
- trái: Mã đề XX
- phải: Trang PAGE/NUMPAGES
- footerReference nằm trong sectPr của file đề
- document.xml.rels có quan hệ footer
- [Content_Types].xml khai báo footer
- word/footer1.xml được đóng gói thật trong DOCX
Không chạm vào file đáp án tự luận.
-->
<!-- Bản sửa 2026-10-02 - Form 1:
Quay lại nền index_thu_nghiem_20261002_v4_form1_khoi_phuc_khung_gach_cheo_trang2.
Giữ nguyên kích thước khung chữ nhật gạch chéo trang 2.
Chỉ hạ phần bắt đầu nội dung đề phía dưới khung thêm khoảng 2 dòng để cắt phách không chạm chữ.
-->
<!-- Bản sửa 2026-10-02 - Form 1:
Khôi phục khung chữ nhật gạch chéo X ở đầu trang 2.
Khung nằm trong luồng Word, cao tới vị trí cắt phách mới (đã hạ ~4 mm),
và được ghép với khối câu hỏi đầu tiên không còn vừa trang 1 để:
- dùng hết trang 1 trước khi chuyển trang;
- khung luôn ở đầu trang 2;
- nội dung đề bắt đầu bên dưới khung, không bị che/mất.
-->
<!-- Bản sửa 2026-10-02 - Form 1:
1) "Bảng số" -> "Điểm bằng số"; "Bảng chữ" -> "Điểm bằng chữ".
2) "Họ và tên học sinh:" và "Lớp:" không còn dòng chấm phía sau.
3) Đường cắt phách nét đứt hạ thấp thêm khoảng 4 mm; phần dưới cũng dịch theo.
-->
<!-- Bản sửa 2026-10-01:
Sửa triệt để xuống dòng câu tự luận:
- nhận a)/b)/c)... ngay cả khi dính sát sau dấu chấm như "kg.a)";
- vùng xem trước dùng từng dòng riêng;
- file Word đề và file Word đáp án tạo từng ý thành paragraph riêng.
-->
<!-- Bản sửa 2026-10-01:
1) Câu tự luận và đáp án: mỗi ý a)/b)/c)/... tự xuống dòng.
2) Tiêu đề đáp án căn trái; Word đáp án dùng "ĐÁP ÁN [TÊN ĐỀ]".
3) Form 1: tên xã/trường căn sát lên trên trong ô đầu trang.
4) Nút Tải xuống tạo một ZIP tên [TÊN ĐỀ], bên trong có thư mục [TÊN ĐỀ]:
   - mỗi mã đề là một file Word riêng;
   - đáp án trắc nghiệm Excel;
   - đáp án tự luận Word.
-->
<!-- Bản sửa 2026-10-01:
1) Trộn đề không dừng ở dòng "Đáp án và thang điểm", nên nhận đủ toàn bộ câu tự luận.
2) Câu tự luận lưu toàn bộ phần đáp án + thang điểm nhiều dòng.
3) Excel đáp án có tiêu đề "ĐÁP ÁN TRẮC NGHIỆM [TÊN ĐỀ]" ở hàng đầu.
-->
<!-- Bản sửa 2026-10-01:
Bảng "Hướng dẫn trộn đề" mở full màn hình và tăng cỡ chữ để dễ đọc.
-->
<!-- Bản sửa 2026-10-01:
- Khi bấm Trộn đề, mở bảng hướng dẫn trước; bấm OK mới mở bảng Trộn đề.
- Bảng hướng dẫn có Hướng dẫn soạn đề gốc + Quy ước trộn đề theo nhóm.
- Trong bảng Trộn đề: 1. Tải đề lên; 2. Thông tin trên đề; 3. Chọn form làm trực tiếp trên đề; 4. Chọn form không làm trực tiếp trên đề; 5. Số mã đề.
- Bỏ Quy ước trộn đề theo nhóm khỏi bảng Trộn đề chính.
-->
<!-- Bản sửa 2026-10-01:
Đáp án trắc nghiệm Excel của Trộn đề dùng một bảng tổng hợp giống mẫu:
Mã đề | Nhiều lựa chọn | Đúng - sai (a,b,c,d) | Trả lời ngắn.
Mỗi mã đề là một hàng; tiêu đề nhiều tầng, gộp ô, kẻ khung mảnh, căn giữa.
-->
<!-- Bản sửa 2026-10-01: Trộn đề Form 1 khớp mẫu fom 1.docx (1 dòng SỐ PHÁCH/MÃ ĐỀ trước đường cắt, 1 dòng sau đường cắt, bảng chấm 4 cột, đường cắt nét đứt). Tách đáp án khỏi file đề: trắc nghiệm xuất Excel riêng, tự luận xuất Word riêng qua nút Đáp án cạnh chọn mã đề. -->
<!-- Bản sửa 2026-10-01:
Trộn đề giữ định dạng bảng Word thông thường:
- bảng không viền vẫn không viền;
- căn lề ô giữ theo Word;
- ô/tiêu đề in đậm giữ in đậm;
- áp dụng cả xem trước và file Word tải xuống.
-->
<!-- Bản sửa 2026-10-01: Trộn đề nhận riêng bảng biến thiên 3x10;
xóa nét dọc thừa, giữ hai đường ngang + đường dọc sau nhãn x/y'/y,
đặt cực trị trên/dưới đúng dấu đạo hàm và tạo 4 mũi tên.
Áp dụng cả vùng xem trước lẫn file Word tải xuống. -->
<!-- Bản sửa 2026-10-01: Trộn đề nhận TABLE64 ở bất kỳ vị trí nào trong đoạn, không yêu cầu TABLE64 phải đứng riêng một dòng; tự bỏ TABLE64 trùng liền nhau để bảng biến thiên chỉ hiển thị một lần. -->
<!-- Bản sửa 2026-10-01: Trình chiếu câu hỏi Word nhận A/B/C/D kể cả khi nội dung dính ngay sau dấu chấm như C.3., D.4. và vẫn giữ phương án rỗng khi đủ chuỗi A-B-C-D; tránh Câu 1-3 bị nhận nhầm thành Tự luận. -->
<!-- 2026-10-01: đồng bộ bảng Word phức tạp chứa MathType cho Bài giảng, Trộn đề, Trình chiếu câu hỏi Word tương tác, Dùng câu hỏi MVIP, Soạn đề kiểm tra và Soạn đề cương từ nền V4. -->
<!-- Bản sửa 2026-10-01 v4: bảng trong Text Box dùng vertical-align mặc định là top; không ép middle !important để các ô có vAlign=bottom như -2, -4 xuống dòng cuối, còn các ô thường như +∞, 2, +∞ nằm ở dòng trên. -->
<!-- Bản sửa 2026-10-01 v3: bảng trong Text Box giữ tỷ lệ chiều cao các hàng theo Word để vertical-align:bottom của các ô như -2, -4 hiển thị đúng thấp hơn hàng y. -->
<!-- Bản sửa 2026-10-01: bắt đầu lại từ bản MathType trực tiếp đã hiển thị ổn định. Chỉ bổ sung nhánh riêng cho Word Text Box chứa w:tbl; không đụng cơ chế MathType chung. -->
<!-- Bản sửa 2026-10-01: Trình chiếu PowerPoint/Word/PDF/Excel - riêng file Word không chuyển MathType thành ảnh; dựng trực tiếp từ MTEF/TeX thành công thức sống, để MathJax tự quyết baseline/kích thước tự nhiên. -->
<!-- Bản sửa 2026-10-01: MathType trong Trình chiếu câu hỏi Word hiển thị theo baseline/kích thước tự nhiên của MathJax, không ép hộp, không ép vertical-align, không ép width/height/line-height. -->
<!-- Bản sửa 2026-10-01: Trình chiếu câu hỏi Word thành câu hỏi tương tác không dùng ảnh raster cho MathType; dựng trực tiếp từ MTEF/TeX bằng MathJax/chữ toán nội dòng, cỡ công thức bám theo cỡ chữ của câu hỏi. -->
<!-- Bản sửa 2026-10-01: Trộn đề nhận diện và giữ nguyên Word Equation/OMML; xem trước dựng đúng cấu trúc phân số/căn/chỉ số/tích phân/ma trận/hệ, file Word tải xuống giữ Equation dạng OMML chỉnh sửa được. -->
<!-- Bản sửa 2026-10-01: Soạn đề kiểm tra và Soạn đề cương giữ MathType Equation.DSMT4 dưới dạng OLE chỉnh sửa được trong Word; giữ nguyên khung kích thước và w:position nguồn, ảnh chỉ là phương án dự phòng. -->
<!-- Bản điều chỉnh 2026-10-01: Trộn đề dùng cùng quy tắc bố trí phương án như Soạn đề kiểm tra: 4 phương án/1 dòng nếu ngắn, 2 phương án/dòng nếu vừa, 1 phương án/dòng nếu dài. -->
<!-- Bản sửa 2026-10-01: Trộn đề giữ kích thước và cao độ MathType đúng theo hộp OLE gốc của Word, thay cho giới hạn 2.25em/32px. -->
<!-- Bản sửa 2026-10-01: Trộn đề đọc đúng MathType OLE và ảnh Word theo đúng vị trí trong dòng; hỗ trợ nhóm <m0>..<m3> và <#m0>..<#m3>. -->
<!-- Bản sửa 2026-09-30 v3: Trộn đề xuất DOCX bằng thư viện docx độc lập, không dùng bộ XML tùy biến của Soạn đề; kiểm tra gói DOCX trước khi tải. -->
<!-- Bản sửa 2026-09-30: sửa dứt điểm DOCX Trộn đề không mở được; đáp án dùng paragraph thuần và kiểm tra XML trước khi tải. -->
<!-- Bản thử nghiệm cập nhật 2026-09-29 (bổ sung 3 mục):
- Soạn đề kiểm tra: mọi câu Đúng - Sai xuất theo bảng 2 cột “Nội dung” / “Đ hoặc S”, cột Đ/S để trống cho học sinh làm bài.
- Không để lộ token nội bộ [[CV7991_ANS:...]] trong đề Word; dùng chính tín hiệu bôi đỏ/gạch chân để suy ra đáp án Đúng - Sai.
- Nếu không nhận diện được CHƯƠNG/BÀI/CHỦ ĐỀ, vẫn nhận diện các dạng câu theo tiêu đề I/II/III/IV hoặc cấu trúc câu; dùng tên tệp làm nhóm dự phòng.
-->
<!-- Bản thử nghiệm cập nhật 2026-09-29:
- Soạn đề kiểm tra và Soạn đề cương khóa kích thước ảnh theo đúng kích thước hiển thị trong Word nguồn; lưu riêng kích thước nguồn để không bị các bước dựng/trình chiếu làm thay đổi trước khi xuất.
- Nút Menu và combo Chọn lớp-môn luôn sáng; khách bấm vào sẽ hiện bảng Đăng nhập lớn.
- Khi đã đăng nhập nhưng chưa chọn lớp-môn mà vào Menu -> Kết quả, hiện bảng lớn có combo chọn lớp-môn; chọn xong tự mở Kết quả.
- Cảnh báo quyền mở “Quản lí” trên web được tăng cỡ chữ đúng 3 lần so với bảng cảnh báo thường.
-->
<!-- Bản điều chỉnh 2026-09-29: Form đề Word đổi vị trí 2 cột, thêm Xem mẫu Form 1/Form 2 và nút OK xuất đề trực tiếp. -->
<!-- Bản điều chỉnh 2026-09-29: thêm Form 3 theo mẫu đầu đề gọn, không cắt phách; dùng chung thông tin đơn vị/trường/tên đề/năm học/thời gian với Form 1. -->
<!-- Bản điều chỉnh 2026-09-30: thêm chức năng Trộn đề công khai cho mọi tài khoản, không cần đăng nhập. -->
<!-- Bản thử nghiệm cập nhật 2026-09-27:
- Cả 3 lựa chọn Sinh đề đều xuất MA TRẬN ngay trước phần ĐÁP ÁN.
- Tiêu đề đáp án của cả 3 lựa chọn dùng thống nhất: “ĐÁP ÁN + Tên đề + Môn/Lớp”.
- Giữ mẫu ma trận A4 ngang, chỉ Chương/Bài/ô được chọn mới xuất.
-->
<!-- Bản thử nghiệm cập nhật 2026-09-27:
- Ma trận trong Word được trình bày đúng mẫu ảnh:
  MA TRẬN + Tên đề + Môn/Lớp -> bảng ma trận -> ĐÁP ÁN + Tên đề + Môn/Lớp -> A. TRẮC NGHIỆM.
- Tiêu đề ma trận căn giữa, ví dụ: “MA TRẬN Đề 11 Toán 8”.
- Giữ nguyên cơ chế chỉ xuất Chương/Bài/ô đã chọn, tổng câu/điểm/tỷ lệ và A4 ngang.
-->
<!-- Bản thử nghiệm cập nhật 2026-09-27:
- File Word sinh nhiều mã đề có thêm MA TRẬN ĐỀ KIỂM TRA ngay trên A. TRẮC NGHIỆM.
- Chỉ Chương/Bài có ô được chọn mới xuất vào ma trận; ô được chọn mới hiện số.
- Có Tổng số câu, Tổng số điểm, Tỷ lệ %, cột Tỷ lệ % điểm bên phải.
- Ma trận tự co theo đúng vùng chữ A4 ngang, lề 1,5 cm, không tràn mép trái/phải.
-->
<!-- Bản thử nghiệm cập nhật 2026-09-27:
- Lựa chọn 2 và 3 có thêm “Các câu tự luận giống nhau”.
- Bảng đáp án nhiều mã đề: “Câu” lên đầu, thêm “Mã đề”, bỏ “Ý”.
-->
<!-- Bản sửa 2026-09-27:
- Khắc phục “Tự có ngân hàng đề” đọc sai số câu của mẫu mới I/II/III/IV + Câu n (NB/TH/VD/VDC).
- Nguyên nhân: dữ liệu vừa parse từ Word chưa được đánh dấu availabilityParsed, nên các ô Đúng-Sai/Trả lời ngắn/Tự luận có 0 câu vẫn bị coi là “chưa biết” và vẫn sáng.
- Sau sửa: chỉ đúng ô thực sự có câu mới sáng; các ô không có câu sẽ mờ/khóa ngay.
-->
<!-- Bản điều chỉnh 2026-09-27:
- File “Ngân hàng câu hỏi ôn tập” sinh từ Soạn đề cương dùng mẫu ngân hàng mới.
- Trong từng Bài, câu được chia theo I. Trắc nghiệm nhiều lựa chọn; II. Trắc nghiệm đúng - sai; III. Trả lời ngắn; IV. Tự luận.
- Bỏ các dòng “Mức độ: ...” và “Dạng câu - Mức độ” của mẫu cũ.
- Mức độ được ghi ngay sau số câu: Câu 1 (NB)., Câu 2 (TH)., Câu 3 (VD)., Câu 4 (VDC).
-->
<!-- Bản sửa 2026-09-27:
- Khắc phục lỗi “Phần mềm chưa tải được danh mục ngân hàng đề phù hợp” khi Dùng câu hỏi của MVIP lấy danh mục từ cache IndexedDB.
- Nguyên nhân: nhánh cache trả catalog trước khi chuyển nguồn sang MVIP, khiến catalog có dữ liệu nhưng bị coi là chưa sẵn sàng.
- Giữ nguyên cơ chế cache danh mục theo Lớp-Môn, tải câu theo yêu cầu và tô vàng ô đã chọn.
-->
<!-- Bản điều chỉnh 2026-09-27:
- Trong “Dùng câu hỏi của MVIP” -> “Soạn câu hỏi”, ô nào chọn số câu > 0 tự chuyển nền vàng.
- Khi đưa số câu về 0, nền vàng tự mất; khi mở lại bảng, các ô đã chọn trước đó vẫn hiện vàng.
-->
<!-- Bản điều chỉnh 2026-09-27:
- Khối tóm tắt trên ma trận hiển thị mỗi loại trên đúng 1 dòng, ví dụ "Nhiều lựa chọn: 4 câu".
- Trong bảng Đặt tên đề, dòng "Nhập tên đề muốn dùng" được đưa lên trên danh sách "Tên đề đã có của ...".
-->
<!-- Bản điều chỉnh 2026-09-27:
- Trên đầu bảng ma trận hiển thị lớn, rõ: số câu Nhiều lựa chọn, Đúng-Sai, Trả lời ngắn, Tự luận và Tổng điểm.
- Mọi ô số câu có giá trị lớn hơn 0 tự chuyển nền vàng; đưa về 0 thì tự trả về nền thường.
-->
<!-- Bản điều chỉnh 2026-09-27:
- Đưa dòng Tên đề/Đặt tên đề lên ngay phía trên bảng Biên soạn ma trận.
- Bổ sung Cài đặt điểm số trong Cấu hình đề: Nhiều lựa chọn chọn 0,25/0,5/1 (mặc định 0,25); Đúng-Sai 1/2/3/4 ý = 0,1/0,25/0,5/1; Trả lời ngắn 0,5; Tự luận 1.
- Tổng điểm và tỷ lệ trong ma trận cập nhật ngay khi đổi điểm câu nhiều lựa chọn.
-->
<!-- Bản điều chỉnh 2026-09-26: cache từng câu dùng GET theo lô nhỏ để tương thích cấu hình /downloads chỉ cho GET/HEAD; khắc phục HTTP 405 khi bấm Sinh đề. -->
<!-- Bản sửa 2026-09-27: chỉ cache DANH MỤC bài + metadata/số lượng câu theo từng Lớp-Môn trên trình duyệt; mỗi lần mở chỉ kiểm tra index.json bằng ETag/Last-Modified và chỉ cập nhật lớp-môn đã thay đổi. Nội dung mini-DOCX/câu hỏi vẫn luôn tải trực tiếp từ máy chủ với cache:no-store, không lưu lâu dài trên máy người dùng. -->
<!--
Bản sửa 2026-09-26: bổ sung ánh xạ ngân hàng Toán 1 tới Khoi_1/Toan_1 để Dùng câu hỏi MVIP / Soạn đề kiểm tra / Soạn đề cương nhận đúng thư mục.
Bản sửa 2026-09-26: ưu tiên cache từng câu trên máy chủ; người dùng chỉ tải đúng các câu được chọn, tự fallback cơ chế Word cũ nếu cache chưa sẵn sàng.
Bản sửa 2026-09-26 (lần 2): các ô không có câu trong ma trận/soạn đề được làm mờ số 0 để dễ phân biệt với ô còn dữ liệu.
Bản sửa 2026-09-26 (lần 3 - nhanh): không tải trước Word để đếm câu; luôn lấy thống kê 4 dạng từ index.json đã tạo sẵn trên máy chủ, nên mở ma trận gần như tức thì.

-->
<!-- Bản sửa 2026-09-26: cache từng câu gọi FastAPI /api/ngan-hang/chon-cau-cache thay cho question_api.php trong /downloads, tránh HTTP 405. -->
<!-- Bản sửa 2026-09-26:
- Ngân hàng câu hỏi nhận đủ 4 dạng: nhiều lựa chọn, đúng - sai, trả lời ngắn, tự luận theo các tiêu đề I/II/III/IV trong file Word.
- “Dùng câu hỏi của Mvip” cho phép chọn Nhiều lựa chọn và Đúng - Sai.
- Bản 2026-09-26: câu Đúng - Sai trong “Dùng câu hỏi của Mvip” giữ nguyên một câu gồm 4 ý a/b/c/d, có nút Quét và nút Đ/S từng ý giống Trình chiếu câu hỏi Word tương tác.
- Bản 2026-09-26 (bổ sung): hiển thị trực tiếp nút Quét ở đầu từng ý a/b/c/d trong Dùng câu hỏi của Mvip; nút dùng đúng luồng quét đã có và đổi trạng thái khi ý đang được quét.
- “Soạn đề kiểm tra” và “Soạn đề cương” cho phép chọn đủ Nhiều lựa chọn, Đúng - Sai, Trả lời ngắn, Tự luận.
- Đổi nhãn “Trình chiếu, kiểm tra bằng hệ thống câu hỏi của Mvip” thành “Dùng câu hỏi của Mvip”.
-->
<!-- Bản sửa 2026-09-24:
- Đồng hồ riêng “Thời gian trả lời” phát 5 tiếng chuông tương ứng với 5, 4, 3, 2, 1 giây.
- Âm chuông này dùng mẫu âm Web Audio riêng, khác với 5 tiếng chuông của đồng hồ chính trên thanh công cụ.
- Khi về 0 đồng hồ vẫn tự ẩn và không kích hoạt lại Vòng quay may mắn.
-->
<!-- Bản sửa 2026-09-24:
- Sắp xếp lại Vòng quay may mắn theo bố cục cân đối hơn.
- Khung “Học sinh được chọn” được đưa lên phía trên bên phải.
- Hai tùy chọn được đặt ngay bên dưới, kéo rộng theo cột bên phải và giữ chữ trên một dòng ở màn hình desktop.
- Màn hình nhỏ vẫn tự xuống dòng để không vỡ giao diện.
-->
<!-- Bản sửa 2026-09-24:
- Mở rộng bảng Vòng quay may mắn trên màn hình desktop.
- Đưa 2 ô tích lựa chọn sang khoảng trống bên phải của khu vực vòng quay để dễ nhìn thấy.
- Trên màn hình nhỏ vẫn giữ bố cục xếp dọc tự nhiên.
-->
<!-- Bản sửa 2026-09-24:
- Thêm ô tích lựa chọn hiện đồng hồ đếm ngược "Thời gian trả lời" trong bảng Vòng quay may mắn.
- Chỉ khi tích ô này thì sau khi bấm Đóng (sau khi đã chọn được học sinh) mới hiện đồng hồ 5 giây.
- Trạng thái ô tích được lưu trên trình duyệt.
-->
<!-- Bản sửa 2026-09-24:
Khắc phục đồng hồ trả lời 5 giây không nhìn thấy khi Vòng quay may mắn đang ở chế độ toàn màn hình.
Đồng hồ 5 giây được đưa vào đúng khung trình chiếu đang toàn màn hình thay vì gắn ngoài body.
Bấm Đóng sau khi đã chọn học sinh sẽ luôn hiện đồng hồ 5→0; về 0 tự ẩn và không gọi lại Vòng quay.
-->
<!-- Bản điều chỉnh 2026-09-24:
- Đồng hồ 5 giây sau khi bấm Đóng Vòng quay may mắn là đồng hồ RIÊNG, không dùng ô Số giây trên thanh công cụ.
- Đồng hồ 5 giây chỉ tính thời gian học sinh trả lời; về 0 thì tự ẩn và KHÔNG khởi động Vòng quay may mắn.
- Chỉ đồng hồ đếm ngược chính trên thanh công cụ khi về 0 mới được phép tự mở Vòng quay may mắn (nếu đã bật Tự động quay) và tự QUAY LẠI.
-->
<!-- Bản điều chỉnh 2026-09-24: Vòng quay may mắn có tùy chọn “Tự động quay khi đồng hồ đếm ngược về 0”. Sau khi đã chọn học sinh và bấm Đóng, MVIP tự chạy đồng hồ trả lời 5 giây trên thanh trình chiếu; hết 5 giây đồng hồ tự kết thúc và trở về trạng thái trước đó. Nếu bật Tự động quay, hết 5 giây MVIP tự mở lại Vòng quay may mắn và tự kích hoạt QUAY LẠI để chọn học sinh tiếp theo. -->
<!-- Bản điều chỉnh 2026-09-24: Bỏ cột "Số câu đúng" khỏi bảng Kết quả. Hệ thống vẫn dùng số câu đúng nội bộ để xếp hạng Kết quả thường xuyên; các học sinh có cùng số câu đúng vẫn đồng hạng. -->
<!-- Bản điều chỉnh 2026-09-24: Bỏ hoàn toàn cơ chế xếp hạng theo thời gian. Kết quả thường xuyên xếp theo số câu đúng; kết quả theo mã đề xếp theo điểm đạt. Học sinh có cùng kết quả chính được đồng hạng; không theo dõi, không lưu và không dùng thời gian trả lời. -->
<!-- Bản điều chỉnh 2026-09-23: Trong Kết quả, tô nền xanh ô Họ và tên của học sinh có tỷ lệ đúng cao nhất (Kết quả thường xuyên) hoặc điểm đạt cao nhất (Kết quả theo mã đề); nếu đồng hạng thì cùng tô xanh, chỉ xét học sinh có dữ liệu trả lời. -->
<!-- Bản điều chỉnh 2026-09-23: Nút “Hướng dẫn sử dụng” trên thanh điều hướng dùng nền xanh, chữ trắng và hiệu ứng nhấp nháy nhẹ để dễ nhận biết. -->
<!-- Bản điều chỉnh 2026-09-16: Giữ bảng dữ liệu trong câu hỏi tương tác và ngân hàng MVIP; không nhận nhầm các dòng A/B/C/D của bảng thành phương án, không bỏ tiêu đề/cột, giữ đầy đủ phương án ngoài bảng. -->
<!-- Bản điều chỉnh 2026-09-15: Ngân hàng câu hỏi nhận CHỦ ĐỀ, ghép tên chủ đề nhiều dòng, hỗ trợ câu hỏi trực tiếp hoặc các BÀI con; giữ nguyên luồng CHƯƠNG – BÀI cũ. -->
<!-- Bản điều chỉnh 2026-09-02: Trình chiếu Word dựng đầy đủ nhóm Shapes neo trong cùng đoạn văn (khung chữ nhật, hình thoi, đường nối và nhãn), đồng thời dùng mốc nội dòng tuyệt đối để nhóm không bị mất khi docx-preview bỏ bookmark rỗng. -->
<!-- Bản điều chỉnh 2026-09-02: Trình chiếu Word chuyển bảng nổi gần hết chiều ngang về luồng tương đương của Word, giữ tblpY/căn giữa và khóa biểu tượng kéo vào tâm đường cắt; Đề số 3 không còn bị đường nét đứt đè lên bảng. -->
<!-- Bản điều chỉnh 2026-09-02: Trình chiếu Word giữ chiều cao các đoạn trống, đổi ký hiệu kéo Wingdings thành Unicode và dựng DrawingML line nét đứt; đường cắt giữa hai bảng của Đề số 3 hiện đúng như Word gốc. -->
<!-- Bản điều chỉnh 2026-09-02: “Trình chiếu câu hỏi word thành câu hỏi tương tác” nhận Shapes đơn lẻ wps:wsp, dựng lại bằng hình học vector Office và chuyển Shape neo trước chữ xuống sau dòng “Câu n.” để không làm mất câu hỏi. -->
<!-- Bản điều chỉnh 2026-09-01: đường thẳng Word có đầu mũi tên được dựng bằng DrawingML vector, không bỏ qua theo nhánh VML; đường line/connector không mũi tên vẫn giữ cơ chế native để bảo toàn các gạch chân cũ. -->
<!-- Bản điều chỉnh 2026-09-01: tắt toàn bộ cơ chế nhận diện/bấm “Hình ảnh phóng to” trong trình chiếu Word và Excel thông thường; ảnh, SVG, biểu đồ, shape và nhóm đối tượng đều giữ tại chỗ như PowerPoint. -->
<!-- Bản điều chỉnh 2026-09-01: shape DrawingML trong Word/Excel được giữ là đối tượng vector độc lập như PowerPoint; bộ phóng to ảnh không còn đóng khung hoặc coi các shape/path này là hình ảnh. -->
<!-- Bản điều chỉnh 2026-09-01: Word/Excel dùng bộ hình học preset DrawingML đầy đủ như PowerPoint, gồm adjustment/multi-path/connector; không còn ép hình mới thành hình vuông. -->
<!-- Bản điều chỉnh 2026-09-01: Shape chữ nhật Word nằm riêng trong một đoạn, neo gần như tại (0,0), được giữ ngay trong luồng đoạn gốc; không còn nhảy lên trước tiêu đề khi dàn trang. -->
<!-- Bản điều chỉnh 2026-09-01: đường VML Word được neo về gốc đoạn, loại khỏi cơ chế khung/phóng to SVG; ba gạch chân giữ đúng tọa độ Word và không còn viền SVG tạo thành các đường thừa. -->
<!-- Bản điều chỉnh 2026-09-01: Word giữ nguyên đường thẳng/đường nối gốc do docx-preview dựng; bỏ lớp tạo bản sao DrawingML/VML để không sinh thêm ba nét gạch ngang trên bảng. -->
<!-- Bản điều chỉnh 2026-09-01: đường nối Word có extent cao/rộng bằng 0 được khóa đúng trục ngang/dọc; VML chỉ có from/to dùng chính hai đầu mút để tính hộp và vị trí, không còn biến gạch chân ngắn thành nét chéo dài xuyên trang. -->
<!-- Bản điều chỉnh 2026-09-01: Word/Excel chọn đúng nhánh Choice của AlternateContent, giữ biểu đồ/shape theo chủng loại thật, đọc màu theme và kiểu bảng Excel; không còn vẽ trùng nhánh Fallback hoặc đổi biểu tượng Office thành ô vuông trắng. -->
<!-- Bản điều chỉnh 2026-09-01: dùng lớp hình học đối tượng của PowerPoint cho Word/Excel; nhận dạng shape/nhóm shape/đường VML/ảnh/biểu đồ, khóa tọa độ-kích thước-z-order; giữ chính xác chiều cao hàng Word và neo đối tượng Excel theo hàng/cột gốc. -->
<!-- Bản điều chỉnh 2026-09-01: Trình chiếu Word thông thường cô lập bảng khỏi CSS chung, giữ đúng tblW/tblGrid và lề ô Word; khôi phục màu/độ dày cho các đường thẳng VML nên đường kẻ chân nổi không còn biến mất. -->
<!-- Bản điều chỉnh 2026-09-01: cập nhật câu hỏi trên bảng và đổi toàn bộ thẻ học sinh thành chữ Mvip; chuyển mục Vòng quay thành nhãn và thêm nhãn ngân hàng câu hỏi trắc nghiệm. -->
<!-- Bản điều chỉnh 2026-09-01: thay ảnh lớp học bằng cảnh bảng tương tác có câu hỏi trắc nghiệm; giáo viên giơ điện thoại hướng về học sinh để quét thẻ A/B/C/D. -->
<!-- Bản điều chỉnh 2026-09-01: đưa Bài giảng xuống cuối cột 1 trên Trang chủ; thêm nút Vòng quay may mắn gọi học sinh trả lời tại vị trí Bài giảng cũ và nối với vòng quay hiện có. -->
<!-- Bản điều chỉnh 2026-09-01: chọn Lớp-Môn từ bất kỳ combo nào (kể cả thanh trình chiếu bên trái) đều ẩn ảnh lớp học và hiện ngay danh sách học sinh. -->
<!-- Bản điều chỉnh 2026-09-01: khi có ít nhất một thẻ hợp lệ, bốn nút A/B/C/D cùng chuyển xanh; phương án giáo viên bấm chọn sẽ mất màu xanh, đảo ngược trạng thái hiển thị cũ. -->
<!-- Bản điều chỉnh 2026-09-01: thay tiêu đề/mô tả đăng nhập phía trên màn hình trình chiếu bằng một hướng dẫn ngắn về chọn lớp-môn và quét phương án trả lời của học sinh. -->
<!-- Bản điều chỉnh 2026-09-01: Word, PDF và Excel thông thường dùng cùng bảng điều khiển/học sinh bên phải với PowerPoint khi thu nhỏ; đổi nhãn nút trình chiếu chung sang dạng liệt kê bốn định dạng. -->
<!-- Bản điều chỉnh 2026-09-01: giữ bảng kiểm tra MVIP che nền cho tới đúng lúc Soạn câu hỏi sẵn sàng nên không nháy trang trung gian; đóng bảng kiểm tra luôn trở về Trang chủ. -->
<!-- Bản điều chỉnh 2026-09-01: đổi Giới thiệu thành Trang chủ, rút gọn nhãn kiểm tra thẻ; bảng Soạn câu hỏi mở từ bảng kiểm tra MVIP sẽ quay lại đúng bảng đó khi Thoát hoặc nhấn Esc. -->
<!-- Bản điều chỉnh 2026-09-01: chia sáu chức năng trang Giới thiệu thành hai cột; ba mục viết-vẽ, kiểm tra thẻ và Bài giảng nằm bên phải; rút gọn mô tả công cụ trực quan. -->
<!-- Bản điều chỉnh 2026-09-01: rút gọn tiêu đề bảng mẫu Word thành “Mẫu câu”; bổ sung cảnh báo Lựa chọn 1 sinh một đề duy nhất không dùng cho chấm theo mã đề. -->
<!-- Bản điều chỉnh 2026-09-01: bảng chuyển câu hỏi Word chỉ còn nút tải file và hiển thị trực tiếp bảng mẫu; Chấm theo mã đề luôn sáng sau khi chọn lớp-môn và hiện hướng dẫn nếu chưa có đề; đưa Vòng quay may mắn sát ô chọn lớp-môn. -->
<!-- Bản điều chỉnh 2026-09-01: Trình chiếu tài liệu dùng nền xanh dương, kiểm tra MVIP dùng nền hồng; đưa Bài giảng thành nút xanh lá cuối danh sách; thay ảnh lớp học bằng ảnh dọc trong bảng học sinh và chỉ hiện khi chưa chọn Lớp-Môn. -->
<!-- Bản điều chỉnh 2026-08-31: chuyển ảnh lớp học xuống bên phải danh sách chức năng; tô tím các nút câu hỏi Word, thêm nút Kiểm tra bằng hệ thống câu hỏi MVIP và hộp chọn Lớp-Môn dùng chung; ẩn các nút Trình chiếu tài liệu/Chấm theo mã đề/Dùng câu hỏi MVIP khỏi màn hình chính. -->
<!-- Bản điều chỉnh 2026-08-31: trang Giới thiệu có ảnh lớp học tương tác; tách tiêu đề thành ba dòng căn giữa, đồng nhất tên chức năng câu hỏi Word và ẩn nút Trình chiếu tài liệu trên thanh điều hướng. -->
<!-- Bản điều chỉnh 2026-08-31: hai dòng đầu trang Giới thiệu trở thành nút sử dụng trực tiếp; gộp PowerPoint/Word/PDF/Excel vào một ô chọn tệp tự phân loại, đổi nút câu hỏi Word; đăng nhập thành công hiện thông báo và bấm OK trở về hai nút này. -->
<!-- Bản điều chỉnh 2026-08-31: rút gọn trang Giới thiệu còn tên MVIP, khẩu hiệu và bốn chức năng chính có biểu tượng; nhìn nhanh là hiểu, bỏ toàn bộ nội dung giới thiệu dài nhưng giữ nguyên các chức năng hệ thống. -->
<!-- Bản điều chỉnh 2026-08-31: thiết kế lại trang Giới thiệu theo định vị “MVIP - Dạy học tương tác. Kiểm tra trắc nghiệm bằng thẻ”; bổ sung mô phỏng tiết dạy, nhóm năng lực cốt lõi, quy trình ba bước và lời mời đăng ký, giữ nguyên toàn bộ chức năng hệ thống. -->
<!-- Bản điều chỉnh 2026-08-31: Trình chiếu PowerPoint nhận đúng q của Wingdings là ký hiệu ô vuông Unicode ở bullet/run, kể cả font kế thừa từ layout/master; giữ nguyên màu, cỡ, khoảng lùi và vị trí của hình gốc, có lớp sửa DOM dự phòng cho nhãn HĐ/HD. -->
<!-- Bản điều chỉnh 2026-08-30: Trình chiếu Word dài cắt bản xem nhanh trước khi quét Equation/MathType, chỉ giải mã ảnh thuộc khoảng hai trang đầu rồi mới chuẩn bị và dựng toàn bộ tài liệu ở lượt rảnh; có ước lượng theo app.xml/bảng khi DOCX không lưu mốc phân trang. PDF dựng trước hai trang rồi tiếp tục từng trang lúc rảnh; PAGE/NUMPAGES trong header/footer Word thay theo từng trang thật, không còn lặp cùng số 2. -->
<!-- Bản điều chỉnh 2026-08-30: Trình chiếu Word thông thường giữ nguyên cỡ từng run và bảng của Word, không nâng chữ 12pt theo Equation 14pt; Equation nội dòng dùng textstyle của Word, Equation độc lập mới dùng displaystyle; cả trang chỉ được fit bằng một phép scale đồng nhất nên Câu 17 không tự xuống dòng hay tràn ô A/B/C/D. -->
<!-- Bản điều chỉnh 2026-09-01: ba nút Danh sách lớp, Soạn đề kiểm tra và Soạn đề cương ban đầu cùng nền xanh; nút được chọn chuyển sang nền trắng. -->
<!-- Bản điều chỉnh 2026-09-01: tài khoản limited được chặn ngay khi mở Dùng câu hỏi của MVIP, Soạn đề kiểm tra hoặc Soạn đề cương; không còn chặn tại các nút Sinh đề/Sinh đề cương. -->
<!-- Bản điều chỉnh 2026-08-30: file Word xuất từ Soạn đề kiểm tra/Xuất đề cương tăng riêng vùng nét MathJax hai tầng 25% và từ ba tầng 30% để phân thức bằng kích thước Trình chiếu Word/PDF/Excel thông thường; công thức một dòng và cách xếp phương án giữ nguyên. -->
<!-- Bản điều chỉnh 2026-08-30: Soạn đề kiểm tra và Xuất đề cương đo trực tiếp vùng nét cuối cùng cùng baseline mới của MathJax theo em; bỏ hoàn toàn kích thước hộp OLE và w:position cũ của MathType trong file Word, giữ nguyên cách xếp phương án. -->
<!-- Bản điều chỉnh 2026-08-30: Soạn đề kiểm tra và Xuất đề cương chuẩn bị MathType/Equation bằng cùng bộ nhận dạng và đo hình học của Trình chiếu Word/PDF/Excel thông thường; MathType dùng PNG MathJax cắt sát nét, Equation giữ cỡ nguồn, không đổi cách xếp phương án. -->
<!-- Bản điều chỉnh 2026-08-30: Trình chiếu PowerPoint đọc dữ liệu MTEF trong đối tượng OLE MathType, dựng lại công thức bằng bộ MathJax dùng chung rồi thay ảnh dự phòng WMF bằng PNG; giữ nguyên kích thước, vị trí và hiệu ứng của shape PowerPoint. -->
<!-- Bản điều chỉnh 2026-08-30: Bài giảng và Dùng câu hỏi của MVIP dùng chung bộ nhận diện, dựng chữ toán/SVG, tính kích thước và căn baseline MathType/Equation của Trình chiếu Word/PDF/Excel thông thường; bộ co giãn màn chiếu không ghi đè kết quả đo chung. -->
<!-- Bản điều chỉnh 2026-08-30: Trình chiếu câu hỏi từ file Word dùng cùng bộ nhận diện, dựng chữ toán/SVG, tính kích thước và căn baseline MathType của Trình chiếu Word thông thường; bỏ hệ số phóng MathType cũ khi đã đi qua bộ đo chung. -->
<!-- Bản điều chỉnh 2026-08-30: các đoạn nối dọc 23AA/239C/239F của dấu ngoặc hệ phương trình và ma trận đi qua cùng bộ làm phẳng SVG; ngoặc trái/phải ba hàng liền nét như Equation Word. -->
<!-- Bản điều chỉnh 2026-08-30: các viewport SVG lồng chứa đoạn nối ngoặc/gạch co giãn của MathJax được đổi thành g + clipPath cùng hệ tọa độ; ngoặc trên hiện liền nét và gạch dưới không còn biến mất sau khi chèn vào trang Word. -->
<!-- Bản điều chỉnh 2026-08-30: Equation Word thông thường giữ nguyên kích thước hình học của các mảnh SVG co giãn; m:bar không ghi vị trí nhưng nằm trong m:limLow được dựng đúng thành gạch dưới. -->
<!-- Bản điều chỉnh 2026-08-30: tính mốc Tab Word trong hệ tọa độ trang gốc, không dùng tọa độ đã bị phóng bởi lớp fit; các phương án A/B/C/D giữ đúng các mốc 2833/5383/7933 twip khi đổi zoom hoặc kích thước cửa sổ. -->
<!-- Bản điều chỉnh 2026-08-29: sửa phép tính nhiều Tab liên tiếp theo con trỏ tuần tự của Word; Câu 1 không dính C-D, Câu 2 và 4 không bị dồn trái, Câu 5 vẫn giữ mốc 2400/5400/8200 twip. -->
<!-- Bản điều chỉnh 2026-08-30: MathType đại số một dòng có lũy thừa/chỉ số như AH^2=BH^2+CH được dựng thành chữ toán nội dòng; loại bỏ toàn bộ hộp OLE rộng ở Câu 4 và vẫn giữ chỉ số, kerning, khoảng cách phép toán. -->
<!-- Bản điều chỉnh 2026-08-29: MathType đại số cơ bản một dòng như 2x+3y=5, P(A)=0,5 được dựng thành chữ toán nội dòng; giữ khoảng cách quanh phép toán nhưng bỏ hoàn toàn đệm ảnh ở hai mép ngoài. -->
<!-- Bản điều chỉnh 2026-08-29: Chuỗi biến Latin viết hoa MathType như MABCD được dựng thành chữ nội dòng có kerning Times New Roman và letter-spacing âm nhẹ; không còn giữ khung ảnh rộng làm các chữ bị thưa. -->
<!-- Bản điều chỉnh 2026-08-29: Biến Latin MathType đã đổi thành chữ nội dòng bám baseline chữ thường, không cộng lại w:position của khung ảnh OLE nên A, B, M, N không còn thấp hơn dòng. -->
<!-- Bản điều chỉnh 2026-08-29: MathType chỉ chứa một biến Latin trong Word thông thường được dựng thành chữ Times New Roman nghiêng nội dòng, kế thừa trực tiếp cỡ chữ của dòng; loại bỏ sai số khung OLE và lỗi co về 8 px. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu Word thông thường chuẩn hóa riêng MathType một ký hiệu và MathType có dấu phủ theo cỡ chữ cùng dòng; giữ w:position của Word để mọi công thức nằm đúng baseline. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu Word thông thường đọc đúng mốc Tab của Word sau khi dựng MathType; Câu 4 dùng bước Tab mặc định 720 twip, Câu 5 giữ các mốc 2400/5400/8200 twip nên A/B/C/D đúng vị trí như file gốc. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu Word thông thường đồng nhất cỡ chữ giữa các câu, tăng riêng phân số hẹp và đưa MathType dạng SVG của phương án C về đúng luồng nội dòng để A/B/C/D giữ nguyên hàng Word. -->
<!-- Bản điều chỉnh 2026-08-29: PowerPoint bỏ KQ quét/KT thêm; Bài giảng bỏ KT thêm và nút Bài giảng chỉ hiện khi phiên máy chủ cấp lesson_access. -->
<!-- Bản điều chỉnh 2026-08-29: PowerPoint có hai shape chồng khít (phương án thường và bản sao đáp án đúng) giữ nguyên ánh xạ ID gốc, không để sửa theo tọa độ gom cả hai vào một shape làm đáp án đúng lộ trước ở slide 1-4. -->
<!-- Bản điều chỉnh 2026-08-29: sửa dứt điểm bảng màu Bút viết/Bút nhớ trong Trình chiếu câu hỏi Word và Trình chiếu Word/PDF/Excel: không tự đóng menu khi presenter đổi class, luôn mở khóa nút màu ngoài PowerPoint và cho menu vượt vùng cuộn ở cửa sổ thường, toàn màn hình, chia đôi. -->
<!-- Bản điều chỉnh 2026-08-29: mọi nơi có Bút nhớ đều dùng chung bộ chọn 4 màu #A8FF00, #D4FF00, #FF4FA3, #A855F7; màu chọn ở một nơi được đồng bộ ngay sang trình chiếu Word/PDF/Excel, PowerPoint, Bài giảng, MVIP, ảnh phóng to và bảng trắng. -->
<!-- Bản điều chỉnh trên nền phiên bản 34: xét riêng từng ảnh; ảnh cao không quá 4 lần ký tự thường hoặc ảnh cao hơn nhưng có tỷ lệ rộng/cao lớn hơn 4 giữ đúng luồng Word; ảnh còn lại theo bố cục góc dưới bên phải của bản 34. -->
<!-- Bản điều chỉnh 2026-08-26 trên nền bản 26: trong câu giữ luồng Word, ảnh/biểu đồ dùng kích thước em suy từ kích thước Word gốc để tăng/giảm đúng cùng tỷ lệ với cỡ chữ. -->
<!-- Bản điều chỉnh 2026-08-26 trên nền bản 26: câu có từ 2 ảnh/bảng/biểu đồ giữ nguyên toàn bộ luồng Word, kể cả ảnh xen giữa hai cụm từ; không gom các đối tượng sang panel phương tiện. -->
<!-- Bản điều chỉnh 2026-08-26 trên nền bản 26: giữ nguyên tiếng tạch/chuông tự nhiên của Vòng quay may mắn và rút tổng thời gian quay còn đúng 4 giây. -->
<!-- Bản điều chỉnh 2026-08-26 trên nền bản 26: câu có tổng số ảnh, bảng và biểu đồ từ 2 trở lên giữ đúng thứ tự xuất hiện trong file Word ở mọi chế độ trình chiếu; câu có tối đa 1 đối tượng giữ bố cục cũ. -->
<!-- Bản điều chỉnh 2026-08-25: Paste được nhiều ảnh hai chiều giữa trình chiếu và bảng trắng; mỗi ảnh kéo/đổi cỡ độc lập và có nút X; thêm Chụp/Paste ở cả hai nửa; chia đôi tự yêu cầu Toàn màn hình và loại nền đen ở nửa trái. -->
<!-- Bản điều chỉnh 2026-08-25: ảnh Paste tạm trên màn hình trái có thể kéo để di chuyển và kéo nút góc để phóng to/thu nhỏ, luôn được giữ trong khung trình chiếu. -->
<!-- Bản điều chỉnh 2026-08-25: bảng trắng tự mở rộng theo cả hai chiều và có thanh cuộn, nền kẻ ngang mờ cách 1 cm; thêm Chụp vùng, sao chép ảnh và nút Paste ảnh tạm sang nửa trình chiếu trái. -->
<!-- Bản điều chỉnh 2026-08-25: compa có dáng và cách kéo để xuất hiện như index.htmlBS26, hai chân compa luôn màu đỏ; khi chia đôi, các nút thừa bị khóa ẩn ở cả DOM và CSS nên không hiện lại lúc đổi mức thu phóng trình duyệt. -->
<!-- Bản điều chỉnh 2026-08-25: khi chia đôi chỉ giữ Bảng trắng/Chia đôi/Đáp án/Hai mũi tên ở thanh trái, đưa dock viết-vẽ lên cùng hàng và giới hạn ảnh phóng to trong đúng nửa phải. -->
<!-- Bản điều chỉnh 2026-09-17: khi chia đôi, câu MC/Đúng-Sai bấm Đáp án vẫn hiện đáp án ở nửa trái; nửa phải tự hiện Lời giải hoặc "Không có lời giải". -->
<!-- Bản điều chỉnh 2026-09-17: khi chia đôi, Tự luận/Trả lời ngắn bấm Đáp án sẽ đưa đáp án sang nửa phải; MC/Đúng-Sai vẫn giữ cơ chế đáp án trái + lời giải phải. -->
<!-- Bản điều chỉnh 2026-09-19: tài khoản limited bị chặn nút Đáp án ở cả Kiểm tra ngay và Trình chiếu câu hỏi Word; hiện thông báo nâng cấp MVIP. -->
<!-- Bản điều chỉnh 2026-09-19: khách chưa đăng nhập bị chặn nút Đáp án ở cả Kiểm tra ngay và Trình chiếu câu hỏi Word; hiện thông báo Đăng nhập. -->
<!-- Bản điều chỉnh 2026-09-17: khôi phục nhận dạng Tự luận/Trả lời ngắn theo index.htmlluu1; Lời giải/Hướng dẫn giải của hai dạng này được dùng trực tiếp làm đáp án, không bị tách khỏi câu. -->
<!-- Bản điều chỉnh 2026-08-25: sửa đồng bộ công cụ chia đôi theo trạng thái canvas thật (tắt hình học trước, kích hoạt bút sau) và bắt trực tiếp nút ở cả hai nửa để bút/tẩy/laze/bút nhớ viết được hai chiều. -->
<!-- Bản điều chỉnh 2026-08-25: trong chế độ chia đôi, thanh viết/vẽ của màn hình trái chuyển lên phía trên; nút Đáp án đưa đáp án sang nửa phải, nút Bảng trắng đưa bảng trắng trở lại; con trỏ/bút/tẩy/laze/bút nhớ được đồng bộ hai chiều giữa hai nửa. -->
<!-- Bản điều chỉnh 2026-08-25: thêm nút Chia đôi màn hình cho Trình chiếu Word và Dùng câu hỏi MVIP; nửa trái trình chiếu, nửa phải là Bảng trắng đầy đủ công cụ, bấm lại để thoát chia đôi mà không mất nét vẽ. -->
<!-- Bản điều chỉnh 2026-08-25: ở chế độ Tất cả, chữ trong bảng kế thừa cỡ chữ ngoài bảng (không vượt quá cỡ ngoài bảng) và được phép xuống dòng để không tràn khung. -->
<!-- Bản điều chỉnh 2026-08-25: chữ trong bảng ở phần Đáp án kế thừa cỡ chữ đáp án bên ngoài (không vượt quá cỡ ngoài bảng) và được phép xuống dòng để không tràn khung. -->
<!-- Bản điều chỉnh 2026-08-25: bảng Đáp án dùng tiêu đề xanh có cỡ chữ bằng nút Đóng; toàn bộ chữ trong nội dung đáp án hiển thị nét thường, không bôi đậm. -->
<!-- Bản điều chỉnh 2026-08-25: câu đồng thời có bảng biểu và hình/biểu đồ luôn sắp bảng trước, hình/biểu đồ sau trong Trình chiếu Word, Dùng câu hỏi MVIP và chế độ xem toàn bộ. -->
<!-- Bản điều chỉnh 2026-08-25: nét bút cách mép thước/eke đúng 1 px tính từ rìa nét; hoàn tác đủ ba loại tam giác/hình chữ nhật; giữ hình học khi đóng/mở bảng trắng; chặn phóng ảnh khi đóng bảng; Esc ưu tiên đóng ảnh phóng to; tự động làm mịn nét bút viết. -->
<!-- Bản điều chỉnh 2026-08-25: Bảng trắng mở toàn màn hình, thu nhỏ thành cửa sổ nửa màn hình có thể kéo; có đủ con trỏ, bút, màu, tẩy, laze, bút nhớ, công cụ hình học, hoàn tác và xóa; bút đặt tại tâm thước đo độ tạm vẽ đoạn thẳng rồi tự trở về bút. -->
<!-- Bản điều chỉnh 2026-08-28: Quét vùng trong Word/PDF/Excel thông thường chụp đúng khung đang nhìn thấy, giữ nguyên mức phóng to, vị trí cuộn và ghép lại đầy đủ ảnh/canvas gốc trước khi Paste; khi bắt đầu chụp mới sẽ khóa ảnh Paste cũ. -->
<!-- Bản điều chỉnh 2026-08-29: ổn định ánh xạ đối tượng tương tác PowerPoint theo cả mã shape và tọa độ gốc; slide tải sẵn giữ nguyên ánh xạ, tránh dấu V/X đôi lúc bị thay bằng nội dung phương án. -->
<!-- Bản điều chỉnh 2026-08-29: khi chia đôi Trình chiếu PowerPoint, nửa trái luôn hiện và sắp xếp đầy đủ Chia đôi → Lùi → Tiến → con trỏ, bút, màu, tẩy, laze, bút nhớ, hình học, hoàn tác, xóa, chụp vùng giống Trình chiếu câu hỏi Word. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu PowerPoint luôn lấy đúng kích thước slide theo pixel/EMU, tự fit lại và đưa thanh cuộn về gốc khi thu nhỏ hoặc chia đôi; không còn chỉ hiện một góc của slide. -->
<!-- Bản điều chỉnh 2026-08-29: khi đóng rồi mở lại PowerPoint, dùng một lớp sân khấu riêng để co và căn giữa toàn bộ slide; không dùng flex/zoom trực tiếp trên gốc dựng nên slide không còn neo vào góc trên trái ở lần mở sau. -->
<!-- Bản điều chỉnh 2026-08-29: trong Trình chiếu PowerPoint, các nút phía trên vẫn bấm bình thường khi bút, tẩy, laze, bút nhớ hoặc hình học đang hoạt động; không bắt giáo viên chuyển về Con trỏ. -->
<!-- Bản điều chỉnh 2026-08-28: Trong Trình chiếu PowerPoint, bấm Next trên phần mềm hoặc dùng phím tiến trên bàn phím khi đang thu nhỏ chỉ tự vào Toàn màn hình nếu lệnh đó thực sự chuyển sang slide kế tiếp; chạy hiệu ứng trong slide hiện tại không đổi chế độ. -->
<!-- Bản điều chỉnh 2026-08-28: Bài giảng dùng đủ bốn phím mũi tên để chuyển nội dung; khi lùi PowerPoint qua ranh giới slide, slide trước được khôi phục ở hiệu ứng cuối để chuỗi lùi liên tục (6→5→4→3→2→1). -->
<!-- Bản điều chỉnh 2026-08-28: ổn định chuột trái và phím mũi tên trong PowerPoint, câu hỏi Word, Bài giảng và câu hỏi Mvip; phím điều hướng vẫn hoạt động sau khi bấm thanh công cụ, mỗi lần nhấn chỉ xử lý một bước và PowerPoint giữ lại một lệnh khi đang dựng slide. -->
<!-- Bản điều chỉnh 2026-08-25: Bảng trắng mở toàn màn hình, thu nhỏ còn nửa màn hình và kéo di chuyển được; có đầy đủ con trỏ, bút, màu, tẩy, laze, bút nhớ, công cụ hình học, hoàn tác và xóa; bút đặt tại tâm thước đo độ tạm chuyển sang vẽ đoạn thẳng rồi tự trở về bút. -->
<!-- Bản điều chỉnh 2026-08-25: compa mở sẵn ở kích thước lớn, cân đối và thẳng đứng; thêm nút Bảng trắng cạnh KQ quét cho Trình chiếu Word và Dùng câu hỏi MVIP, mở bảng trắng rộng 1/2 màn hình với đầy đủ công cụ vẽ hình. -->
<!-- Bản điều chỉnh 2026-08-25: tâm quay compa/eke/thước đo độ/thước thẳng hiển thị trong suốt; bấm compa trong bảng là hiện ngay; nút X compa màu đen; hoán đổi vị trí nút xoay và nút di chuyển của compa. -->
<!-- Bản điều chỉnh 2026-08-24: Hoàn tác chỉ tác động nét viết và hình đã vẽ, không thay đổi trạng thái/vị trí/kích thước của compa, eke, thước đo độ, thước thẳng; nút màu bút luôn hiển thị và màu đã chọn dùng cho mọi hình vẽ. -->
<!-- Bản điều chỉnh 2026-08-24: nét bút bám cạnh thước thẳng và eke chỉ lệch 1 px so với cạnh dụng cụ. -->
<!-- Bản điều chỉnh 2026-08-24: nút thước/eke bố trí lại; thước 20 cm một lề có nút đổi lề; mọi thước kéo được từ thân; bút bám cạnh, vuông góc cạnh và đi qua tâm thước đo độ. -->
<!-- Bản điều chỉnh 2026-08-24: nút xoay thước thẳng đặt sát nút co giãn; chọn Thước đo độ sẽ hiện ngay; chỉnh vị trí nút eke; bảng Bài giảng mở gần toàn màn hình và nút xuất nằm cuối cùng một hàng. -->
<!-- Bản điều chỉnh 2026-08-24: mọi nút của compa, thước thẳng, thước đo độ và eke hoạt động trong mọi chế độ con trỏ/bút/laze/bút nhớ/tẩy; toàn bộ nút thước thẳng luôn nằm trong nửa thân không có vạch số và tự đổi nửa khi đổi lề. -->
<!-- Bản điều chỉnh 2026-08-24: nút xoay thước thẳng đặt sát nút co giãn; chọn Thước đo độ hiện ngay; nút quay/X của eke đặt đúng vị trí; bảng Bài giảng phủ kín màn hình và nút xuất nằm cuối cùng hàng tên bài. -->
<!-- Bản sửa 2026-09-29: Bấm OK trong bảng Chọn form đề Word là lệnh xác nhận cuối cùng; ẩn bảng Lựa chọn cách sinh đề phía sau và sinh/xuất Word ngay, không quay lại bảng lựa chọn. -->
<!-- Bản điều chỉnh 2026-09-29 (phân trang Form 1 v2): bỏ toàn bộ ngắt trang cưỡng bức sau khi vào đề. Chỉ xác định khối đầu tiên không còn vừa trang 1, ghép khung mặt sau phách + chính khối đó thành một khối không tách để Word tự đẩy cả cụm lên đầu trang 2. Từ đó trở đi Word tự phân trang tự nhiên; bảng biểu được giữ nguyên khối nếu còn vừa trên một trang. -->
<!-- Bản điều chỉnh 2026-09-29: Form 1 xuất từng mã đề có trang 2 bắt đầu bằng khung chữ nhật gạch chéo X, cao bằng vùng phách mặt trước; nội dung tiếp tục bên dưới khung để cắt phách. -->
<!-- Bản sửa 2026-10-01: Trình chiếu Word thông thường giữ đúng hộp OLE và w:position của MathType Equation.DSMT4; công thức nhiều tầng tự mở chiều cao dòng, không chồng lên chữ/câu kế tiếp. -->
<!-- Bản sửa 2026-10-01 lần 2: khóa MathType trong đúng khung OLE gốc và tự co phần nét MathJax vào khung trước khi hiển thị; chặn công thức tràn ngang/dọc đè lên chữ ở Trình chiếu tài liệu Word. -->
<!-- Bản sửa 2026-10-01 lần 3: Trình chiếu Word thông thường dựng MathType Equation.DSMT4 bằng ảnh PNG đã raster hóa từ MTEF/TeX trong đúng khung OLE gốc; không dùng lại nhánh chữ/SVG động nên công thức không mất, không tách khỏi dòng và không lệch bố cục. -->
<!-- Bản sửa 2026-10-01 lần 5: bỏ toàn bộ viền/outline xanh và cơ chế phóng to ảnh đối với MathType raster trong Trình chiếu Word thông thường; công thức vẫn giữ kích thước/vị trí như bản V4. -->
<!DOCTYPE html>
<!-- Bản điều chỉnh 2026-09-19: Trang chủ bỏ hai biểu tượng quyển vở hai bên tiêu đề; đổi khẩu hiệu chính thành “Phần mềm dạy học tương tác và kiểm tra trắc nghiệm bằng thẻ”. -->
<!-- Bản điều chỉnh 2026-08-30: MathType ưu tiên TeX/MTEF từ OLE gốc thay cho WMF xem trước; véc tơ một biến dùng dấu ngắn theo đúng ký tự, cung dùng một nét cong mảnh theo tỷ lệ bản Word gốc và bỏ cơ chế kéo mũi tên theo toàn bộ SVG ở mọi chế độ. -->
<!-- Bản điều chỉnh 2026-08-30: Excel thông thường đọc bắt buộc XML hàng/cột bằng JSZip; cột ẩn và chiều cao tùy chỉnh không còn phụ thuộc dữ liệu dự phòng của SheetJS. -->
<!-- Bản điều chỉnh 2026-08-30: Excel thông thường chỉ dựng tới ô có dữ liệu, giữ kích thước hàng/cột và ô gộp theo workbook; không tự co vừa trang, bảng vượt màn hình được cuộn ngang/dọc. -->
<!-- Bản điều chỉnh 2026-08-29: Mọi ảnh MathType còn lại được cắt ngang theo đúng biên nét riêng của từng công thức, chỉ giữ 1 px chống lẹm nét; chế độ Word thông thường không cộng thêm lề ngang ngoài công thức. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu Word/PDF/Excel thông thường nhận diện toàn bộ Equation/OMML bằng cùng luồng token + cv7991PresenterEquationHtml của Trình chiếu câu hỏi từ file Word; hỗ trợ phân số, căn, chỉ số, tích phân, dấu, ma trận, hệ và công thức độc lập, đồng thời giữ màu/cỡ chữ/vị trí Word. -->
<!-- Bản điều chỉnh 2026-08-29: Trình chiếu Word/PDF/Excel thông thường nhận diện riêng hệ phương trình OMML nhiều dòng, dựng dấu ngoặc trái co giãn bằng MathJax và giữ hệ nằm đúng trong dòng văn bản như Word gốc. -->
<!-- Bản điều chỉnh 2026-08-27: thêm nút Trình chiếu PowerPoint riêng; trình chiếu từng slide, giữ bố cục/kiểu chữ/màu và tái hiện các transition, animation phổ biến theo thứ tự bấm trong tệp PPTX. Bổ sung tương thích file trò chơi dùng ppaction macro, âm thanh trong trigger và đồng hồ WMV dự phòng. -->
<!-- Bản điều chỉnh 2026-08-27: chế độ Word/PDF thông thường hiển thị liên tục theo toàn chiều rộng màn hình, cuộn dọc để xem tiếp và có đường kẻ ngang phân cách từng trang. -->
<!-- Bản điều chỉnh 2026-08-27: đổi nút Trình chiếu Word thành Trình chiếu tài liệu; tách chế độ câu hỏi Word hiện có và chế độ trình chiếu nguyên trang Word/PDF, chế độ tài liệu thường không hiện Đáp án/Tất cả/Chọn câu/Số giây. -->
<!-- Bản điều chỉnh 2026-08-24: tăng vùng bắt tâm quay và khóa chính xác đầu mút của đoạn thẳng, tia, đường thẳng vào tâm; không để nút dụng cụ gần đó chiếm thao tác. -->
<!-- Bản điều chỉnh 2026-08-24: Đoạn thẳng, tia và đường thẳng có thể bắt đầu chính xác tại vòng tròn đánh dấu tâm quay của compa, eke, thước thẳng và thước đo độ; thao tác tại tâm không tự chuyển sang dụng cụ. -->
<!-- Bản điều chỉnh 2026-08-24: tâm quay thước thẳng đặt đúng tại giao điểm vạch 0 với lề có số; tâm quay compa, eke, thước đo độ và thước thẳng hiển thị bằng vòng tròn không tương tác, cho phép bắt đầu nét bút chính xác tại tâm. -->
<!-- Bản điều chỉnh 2026-08-24: thêm khóa bảo vệ ở cấp tương tác, chỉ điểm bấm trên nút mũi tên bốn chiều mới khởi tạo được thao tác di chuyển compa, eke, thước thẳng hoặc thước đo độ. -->
<!-- Bản điều chỉnh 2026-08-24: compa, eke, thước thẳng và thước đo độ chỉ di chuyển khi kéo đúng nút mũi tên bốn chiều; kéo thân hoặc các điểm khác không làm dịch chuyển dụng cụ. -->
<!-- Bản điều chỉnh 2026-08-24: nét bút bám cạnh thước thẳng và eke chỉ cách cạnh 1 px. -->
<!-- Bản điều chỉnh 2026-08-24: nét bút bám dọc cạnh thước thẳng và thước eke chỉ lệch khỏi mép 1 px để vừa nhìn thấy nét vừa bám sát cạnh thước. -->
<!-- Bản điều chỉnh 2026-08-24: nét bút bám theo cạnh thước thẳng và eke được dịch ra ngoài đúng 1 px, vẫn giữ đúng phương song song/vuông góc với cạnh. -->
<!-- Bản điều chỉnh 2026-08-24: thêm nút di chuyển 4 chiều cho eke, thước thẳng và thước đo độ; các nút di chuyển hoạt động ở mọi chế độ con trỏ/bút/laze; tăng giới hạn chiều dài eke và thước thẳng tới chiều rộng màn hình chiếu. -->
<!-- Bản điều chỉnh 2026-08-24: bấm trực tiếp vào dụng cụ đang hiện để làm việc; eke quay quanh góc vuông mốc 0; thước 1 lề đổi mép bằng mũi tên, quay quanh mốc 0; tâm đường tròn/cung tròn hiển thị dạng chấm. -->
<!-- Bản điều chỉnh 2026-08-23: khi câu/NDTC không có đề dẫn mà bắt đầu ngay bằng A/B/C/D hoặc a/b/c/d, chỉ dựng các phương án/ý một lần; không lấy phương án/ý đầu làm đề bài gây trùng. -->
<!-- Bản điều chỉnh 2026-08-23: nhận diện thêm các dòng độc lập “NDTC:” và “Giải NDTC:”; giữ nguyên và trình chiếu các đoạn chỉ chứa số tự nhiên trong nội dung hoặc lời giải NDTC. -->
<!-- Bản điều chỉnh 2026-08-23: nhận diện các dòng độc lập “NDTC” và “Giải NDTC” không đánh số; tự đánh số nội bộ theo thứ tự từ đầu đến cuối file và ghép mỗi Giải NDTC với NDTC ngay trước đó. -->
<!-- Bản điều chỉnh 2026-08-23: thước đo độ có hai vòng số thuận-nghịch và vạch 1°; nút quay xanh của compa được bắt ưu tiên với vùng bấm rộng, không còn sinh compa mới. -->
<!-- Bản điều chỉnh 2026-08-23: chuyển nút quay màu xanh của compa sang đúng thanh bút; vùng bấm giữ để quay cũng đi theo nút mới. -->
<!-- Bản điều chỉnh 2026-08-23: “Xuất để in” chỉ xóa các dòng nhãn NDTCn, Giải NDTCn và ***Hết NDTC***; giữ nguyên toàn bộ nội dung, hình, bảng và Equation nằm giữa các nhãn. -->
<!-- Bản điều chỉnh 2026-08-22: Bài giảng có Xuất nguyên trạng/Xuất để in; bản in bỏ toàn bộ khối NDTC-Giải NDTC; rút gọn nhãn Tất cả/Từng câu/Kết quả quét; thêm Kiểm tra thêm trong trình chiếu Bài giảng. -->
<!-- Bản điều chỉnh 2026-08-22: khi gặp ***Hết NDTC***, kết thúc ngay khối NDTC/Giải NDTC hiện tại, bỏ qua nội dung ngoài phạm vi và tiếp tục tìm mốc NDTC tiếp theo. -->
<!-- Bản điều chỉnh 2026-08-22: sửa NDTC có nội dung bắt đầu bằng “Đa thức/Đa giác/Đa biến” bị nhận nhầm “Đa” thành nhãn đáp án viết tắt ĐA; giữ đầy đủ nội dung trong phần trình chiếu. -->
<!-- Bản điều chỉnh 2026-08-21: mỗi đoạn văn bản khi Trình chiếu Word có hai ký tự trắng ở đầu đoạn và được căn đều hai lề; tiêu đề NDTC vẫn căn giữa. -->
<!-- Bản điều chỉnh 2026-08-21: tài liệu có NDTC/Giải NDTC được ưu tiên nhận dạng; không trình chiếu nhãn NDTC, lấy đoạn đầu sau NDTC làm tiêu đề căn giữa; chỉ NDTC có A/B/C/D hoặc a/b/c/d kèm tín hiệu đáp án mới lần lượt là MC/Đúng-Sai, còn lại là Tự luận. -->
<!-- Bản điều chỉnh 2026-08-21: Trình chiếu Word nhận diện NDTCn/Giải NDTCn; mỗi NDTC là một câu tự luận và Giải NDTC cùng số là đáp án tương ứng. -->
<!-- Bản điều chỉnh 2026-08-21: câu Đúng–Sai có hai nút Đúng/Sai; Xem đáp án chấm lựa chọn và phát âm thanh MP3 đã lưu trong Cache Storage của trình duyệt. -->
<!-- Bản điều chỉnh 2026-08-21: đổi tên thành Vòng quay may mắn; thêm nút vòng quay cạnh “Dùng câu hỏi của Mvip”; bấm hình/biểu đồ sẽ đồng thời mở toàn màn hình rồi phóng to. -->
<!-- Bản điều chỉnh 2026-08-20: tăng rõ âm lượng tiếng tạch của Vòng quay may mắn; bổ sung nút và toàn bộ vòng quay cho chế độ Dùng câu hỏi của MVIP, dùng chung danh sách học sinh của Lớp-Môn đang chọn. -->
<!-- Bản điều chỉnh 2026-08-20: Vòng quay may mắn phát tiếng tạch theo nhịp quay; tiếng nhanh dần trong 3 giây đầu rồi chậm dần đến khi vòng quay dừng hẳn. -->
<!-- Bản điều chỉnh 2026-08-20: thêm trò chơi Vòng quay may mắn cho tài khoản Trial/Full; nút chỉ hiện sau khi chọn Lớp-Môn, vòng quay chia theo danh sách học sinh và hiện tên học sinh được chọn ngẫu nhiên. -->
<!-- Bản điều chỉnh 2026-08-20: bấm nút Quét trước ý a/b/c/d đồng thời yêu cầu Trình chiếu Word chuyển sang toàn màn hình; nếu đã toàn màn hình thì chỉ bắt đầu quét ý đã chọn. -->
<!-- Bản điều chỉnh 2026-08-20: áp dụng bộ công cụ cho cả Dùng câu hỏi của MVIP và chế độ thu nhỏ; bút nhớ đổi sang vàng cam, độ mờ cố định. -->
<!-- Bản điều chỉnh 2026-08-20: bút nét mảnh hơn; bút nhớ vàng cam có độ mờ cố định; tẩy có 4 cỡ và con trỏ ô vuông; điểm laze lớn hơn, không hiện dấu cộng. -->
<!-- Bản điều chỉnh 2026-08-20: công cụ trình chiếu mặc định là con trỏ; menu gồm con trỏ, bút, tẩy, bút laze, bút nhớ; bút có 4 màu, bút nhớ màu vàng và Ctrl+Z hoàn tác nét gần nhất. -->
<!-- Bản điều chỉnh 2026-08-20: bổ sung bút viết tay và bảng chọn màu trên thanh Trình chiếu Word; nút bút/con trỏ chuyển đổi hai chế độ, nét vẽ phủ đúng vùng màn hình trình chiếu và tự thích nghi khi đổi kích thước/toàn màn hình. -->
<!-- Bản điều chỉnh 2026-08-20: bấm phương án/ý chỉ đổi trạng thái nút tích chọn ở cuối hàng, không đổi màu hàng và không hiện Đ/S; Xem đáp án chỉ làm các phương án/ý đúng nháy nền xanh 3 lần kèm 3 tiếng chuông. -->
<!-- Bản điều chỉnh 2026-08-20: không coi câu văn bắt đầu bằng “Kết quả ...” là phần đáp án; giữ đoạn mô tả và nhận đúng các ý a/b/c/d của câu Đúng–Sai. -->
<!-- Bản điều chỉnh 2026-08-20: bấm “Chọn câu” đồng thời yêu cầu phóng to toàn màn hình rồi mở bảng lưới chọn câu; nếu đã toàn màn hình thì chỉ mở bảng. -->
<!-- Bản điều chỉnh 2026-08-20: bảng “Chọn câu trình chiếu” chỉ hiển thị các nút tiêu đề câu theo lưới ngang, tự xuống dòng và cuộn dọc khi vượt chiều cao màn hình. -->
<!-- Bản điều chỉnh 2026-08-20: thay ô nhập số câu và nút Xem bằng nút “Chọn câu”; nút mở bảng tiêu đề toàn bộ câu hỏi và bấm một dòng sẽ trình chiếu riêng đúng câu đó. -->
<!-- Bản điều chỉnh 2026-08-20: trong “Tất cả”, bấm hoặc nhấn Enter/Space vào tiêu đề màu xanh của câu sẽ chuyển ngay về “Từng câu” đúng câu đó. -->
<!-- Bản điều chỉnh 2026-08-20: nếu DOCX có các tiêu đề PHẦN I/II/III/IV và số câu lặp lại giữa các phần, tiêu đề trình chiếu ưu tiên dạng “I. Câu 1”, “II. Câu 1”, “III. Câu 1”, “IV. Câu 1”; các file không chia phần giữ nguyên cách đánh số cũ. -->
<!-- Bản điều chỉnh 2026-08-20: bỏ chữ gợi ý ở Họ và tên/Điện thoại/Email, đổi thành Đặt mật khẩu; nhận diện chỉ số kiểu Word cũ bằng w:position + cỡ chữ nhỏ; gộp danh sách tài khoản đã lưu vào ô Tên đăng nhập bằng menu xổ xuống giữ trạng thái. -->
<!-- Bản điều chỉnh 2026-08-19: bảng dữ liệu ngang giữ nguyên đúng vị trí xuất hiện trong nội dung Word; bảng nằm sau đoạn văn nào thì trình chiếu ngay sau đoạn đó, trước các câu/ý và phương án tiếp theo. -->
<!-- Bản điều chỉnh 2026-08-19: khi đồng hồ đếm ngược về 0, Trình chiếu Word và Dùng câu hỏi của MVIP chỉ phát chuông rồi dừng đếm; không tự thu nhỏ hoặc thoát toàn màn hình. -->
<!-- Bản điều chỉnh 2026-08-19: “Tất cả” dựng theo từng đợt nhỏ, chỉ căn MathType/hình ở các câu sắp xuất hiện; xóa trạng thái canvas từng câu trước khi vào danh sách để không còn đứng hình hoặc lệch thẻ sang góc phải. -->
<!-- Bản điều chỉnh 2026-08-19: sửa trạng thái toàn màn hình MVIP bị lưu sót khi thu nhỏ; chỉ coi là toàn màn hình khi khung trình chiếu thực sự phủ màn hình, tự fit lại nhiều nhịp sau khi thoát và luôn kiểm tra tỷ lệ theo kích thước viewport hiện tại để không cắt mép nội dung. -->
<!-- Bản điều chỉnh 2026-08-19: Dùng câu hỏi của MVIP dùng chung bộ đo, co cỡ chữ, căn MathType, phân loại bảng và bố trí ảnh từng câu với Trình chiếu Word; mọi thay đổi hiển thị của Trình chiếu Word được áp dụng đồng nhất cho MVIP. -->
<!-- Bản điều chỉnh 2026-08-19: đọc đúng phần row/column partition của bản ghi MATRIX trong MTEF; hệ nhiều dòng/hệ 3 phương trình MathType không còn bị cắt thành một ký tự lạ. -->
<!-- Bản điều chỉnh 2026-08-19: sửa mất ký tự đầu ở TeX nhúng (ví dụ F(x)); công thức hộp thấp như z=0, t=1, r=10 được tăng nhẹ để không bé bất thường; công thức TeX nhúng nghi ngờ sẽ tự rơi về MTEF/ảnh gốc để tránh biến hệ phương trình thành ký tự lạ. -->
<!-- Bản điều chỉnh 2026-08-19: chống giật hình ở Câu 15 khi vào toàn màn hình; gộp các lượt fit, chỉ đo lại khi kích thước thật đổi và chờ khung ổn định trước khi hiện nội dung. -->
<!-- Bản điều chỉnh 2026-08-19 v3: tăng cỡ chữ tối thiểu của màn hình lớn lên 20 pt thật (26,667 px CSS); nội dung dài cuộn dọc, không thu chữ dưới mức này. -->
<!-- Bản điều chỉnh 2026-08-19 v2: mặt phẳng màn hình lớn dùng cỡ chữ logic tối thiểu; cửa sổ thu nhỏ chỉ co đồng dạng toàn bộ bố cục, nội dung dài vẫn cuộn dọc. -->
<!-- Bản điều chỉnh 2026-08-19: câu tự luận có hình ở góc phải dưới dùng vùng né ảnh động; văn bản trải toàn chiều rộng phía trên hình và chỉ thu sang trái tại đúng phần chiều cao có hình. -->
<!-- Bản điều chỉnh 2026-08-18 v23: giữ nguyên bố cục trình chiếu ảnh như bản v21; chỉ xếp ngang và co MathType đối với bảng dữ liệu thuần, không tác động bảng dùng để chứa hình. -->
<!-- Bản điều chỉnh 2026-08-18 v21: chuẩn bị cả ảnh/MathType nằm trong ô bảng Word để không còn báo “Không thể tải được hình”; bỏ dòng mô tả chính sách email dưới ô đăng ký. -->
<!-- Bản điều chỉnh 2026-08-19: đăng ký chỉ chấp nhận đúng các nhà cung cấp email trong danh sách cho phép và tên miền edu.vn/gov.vn (kể cả tên miền con); mọi tên miền khác bị chặn trước khi gửi API. -->
<!-- Bản điều chỉnh 2026-08-18 v18: bỏ trình tự “Xem đáp án ý a/b/c/d”, dùng một nút Xem đáp án để hiện toàn bộ; nhận diện đáp án đúng thêm các màu #92D050, #00B050, #00B0F0 và #0070C0. -->
<!-- Bản điều chỉnh 2026-08-18 v17: câu không có đáp án chỉ đổi chữ phương án/ý được bấm sang màu tím; không đổi nền và câu Đúng–Sai không hiện Đ/S. -->
<!-- Bản điều chỉnh 2026-08-18 v16: nhận đáp án từ chữ cái xanh; xem đáp án MC tô nền xanh/đỏ; bấm MC phản hồi xanh/đỏ/vàng; bấm Đúng–Sai hiện Đ/S cuối ý. -->
<!-- Bản điều chỉnh 2026-08-18 v15: bấm phương án câu nhiều lựa chọn hoặc ý câu Đúng–Sai để đổi nền ô sang xanh lá; lưu trạng thái khi trình chiếu được dựng lại. -->
<!-- Bản điều chỉnh 2026-08-18: giải mã đúng chữ Việt TCVN3 trong nhãn mũi tên MathType và dựng đúng mũi tên cân bằng thuận nghịch có điều kiện phía trên. -->
<!-- Bản điều chỉnh 2026-08-18 v13: bấm tại mọi vị trí trong khung ảnh để phóng to ở Trình chiếu Word và Dùng câu hỏi MVIP; thêm đường viền khung cho ảnh, SVG và canvas. -->
<!-- Bản điều chỉnh 2026-08-18 v12: Dùng câu hỏi của MVIP dùng nút phóng to/thu nhỏ bằng hai mũi tên chéo, đặt sát nút X; đổi Xem KQ thành Kết quả quét. -->
<!-- Bản điều chỉnh 2026-08-18: bỏ ký tự khoảng trắng Symbol U+F020 gây ô vuông sau mũi tên; đổi nút toàn màn hình thành biểu tượng phóng to/thu nhỏ; thu gọn ô Số giây; đổi thành Kết quả quét và chỉ hiện cho trial/full. -->
<!-- Bản điều chỉnh 2026-08-18: MathType chỉ gồm một chữ số trong phương án được dựng thành chữ số thường cùng cỡ chữ; bỏ hệ số thu nhỏ 30% và tránh cắt mất công thức trong ô. -->
<!-- Bản điều chỉnh 2026-08-17: giảm MathType trong trình chiếu đúng 5% và giữ nét mảnh; bấm ảnh để phóng to trong Dùng câu hỏi của MVIP; ảnh giữ tỷ lệ và đạt cao 2/3 hoặc rộng 1/3 màn hình, phần còn lại tự bố trí nội dung. -->
<!-- Bản điều chỉnh 2026-08-17: làm rõ viền các ô phương án/ý; chuyển mũi tên Symbol cũ trong DOCX thành Unicode để không còn hiện ô vuông. -->
<!-- Bản điều chỉnh 2026-08-17: cắt thật vùng trong suốt của MathType theo phần nét nhìn thấy, giữ đệm an toàn nhỏ và tính lại baseline; kích thước phần nét không đổi. -->
<!-- Bản điều chỉnh 2026-08-17: căn giữa theo chiều cao phần NÉT nhìn thấy của nội dung phương án; khắc phục MathType làm hộp dòng cao khiến cả chữ và công thức tụt xuống đáy ô. -->
<!-- Bản điều chỉnh 2026-08-17: sửa MathType bị tụt xuống do margin-bottom âm khi nén dòng; giữ nguyên toàn bộ kích thước công thức hiện tại. -->
<!-- Bản điều chỉnh 2026-08-17: áp dụng quy tắc giữ kích thước cho cả nhóm hàm số bậc hai dạng y = ax^2; loại bỏ các đoạn Word rỗng gây khoảng trắng dọc quá rộng khi trình chiếu. -->
<!-- Bản điều chỉnh 2026-08-17: giữ nguyên kích thước công thức MathType y = -1/4 x^2; không áp dụng tăng 30% của nhóm công thức còn nhỏ. -->
<!-- Bản điều chỉnh 2026-08-17: tự nhận diện MathType còn nhỏ theo tỷ lệ nét/glyph và tăng thêm 30%; giữ nguyên các MathType đã đạt kích thước phù hợp. -->
<!-- Bản điều chỉnh 2026-08-17: MathType một dòng hạ thêm 1px; MathType chỉ gồm một chữ số thu nhỏ thêm 30%; MathType nhiều tầng tăng 5%. -->
<!-- Bản điều chỉnh 2026-08-17: hạ nhẹ và thu nhỏ riêng công thức MathType; giữ nguyên Equation/OMML. -->
<!-- Bản điều chỉnh 2026-08-16: căn từng công thức MathType theo baseline thật của SVG MathJax/MTEF; loại bỏ sai lệch cao-thấp giữa ký hiệu đơn, số, phân số và biểu thức nhiều tầng; không đổi Equation/OMML. -->
<!-- Bản điều chỉnh 2026-08-16: hạ riêng công thức MathType theo độ lệch quang học; giữ nguyên công thức Equation/OMML đã căn đúng. -->
<!-- Bản điều chỉnh 2026-08-16: công thức MathJax dùng baseline gốc của SVG để chân ký tự chính trong biểu thức một dòng trùng với chân chữ thường; bỏ độ hạ toàn khối -0,16em. -->
<!-- Bản điều chỉnh 2026-08-16: căn chân công thức MathType một dòng theo chân chữ thường bằng phần nét thực tế, không dùng căn giữa hộp ảnh. -->
<!-- Bản điều chỉnh 2026-08-16: sửa bảng Mẫu câu trình chiếu Word; vô hiệu min-width toàn cục đối với bảng Đ/S lồng nhau để không đè sang cột Trả lời ngắn hoặc tự luận. -->
<!-- Bản điều chỉnh 2026-08-16: câu Trả lời ngắn có các ý a/b/c/d vẫn tách đề bài và dựng các ý theo một cột với nhãn màu xanh, kể cả khi đứng sau tiêu đề phần “TRẮC NGHIỆM TRẢ LỜI NGẮN”. -->
<!-- Bản điều chỉnh 2026-08-16: câu tự luận nhiều ý được tách thành đề bài và các ý a/b/c/d xếp một cột; bảng Word dùng để bố trí ý được chuyển thành dữ liệu ý thay vì hình/bảng bên phải. -->
<!-- Bản điều chỉnh 2026-08-16: tách đúng câu mới khi ảnh DrawingML dạng anchor đứng trước nhãn “Câu ...” trong cùng đoạn DOCX; chuyển ảnh đầu đoạn vào câu mới thay vì ghép vào câu trước. -->
<!-- Bản điều chỉnh 2026-08-16: câu nhiều lựa chọn có nhiều đáp án vẫn tô đỏ toàn bộ phương án được đánh dấu khi cảnh báo; bảo toàn và bố trí hình vẽ, bảng biểu, biểu đồ của câu tự luận, kể cả DrawingML thiếu kích thước hiển thị. -->
<!-- Bản điều chỉnh 2026-08-16: hợp nhất mọi tín hiệu đáp án của câu nhiều lựa chọn; cảnh báo khi có hơn 01 phương án đúng; lặp lại hình vẽ chung trong đáp án từng ý tự luận. -->
<!-- Bản điều chỉnh 2026-08-16: bấm trực tiếp hình ảnh trong Trình chiếu Word để mở khung phóng to gần toàn màn hình; hỗ trợ ảnh raster, SVG/DrawingML và canvas; đóng bằng nút Đóng, nền tối hoặc phím Esc. -->
<!-- Bản điều chỉnh 2026-08-16: phân biệt tự luận nhiều ý với Đúng–Sai theo tín hiệu đáp án; xem đáp án tự luận lần lượt a–d; tự đánh số câu trùng; câu không có đáp án hiện thông báo. -->
<!-- Bản điều chỉnh 2026-08-15: nhận diện đáp án Đúng–Sai từ bảng Đ/S; xem đáp án lần lượt từng ý; rút gọn combo Lớp-Môn; đổi nút Thu nhỏ thành Thoát; cập nhật bảng mẫu. -->
<!-- Bản điều chỉnh 2026-08-15: phóng đôi cỡ chữ bảng đáp án; thêm đồng hồ “giây” và 5 tiếng tíc cuối cho Trình chiếu Word/Dùng câu hỏi Mvip. -->
<!-- Bản điều chỉnh 2026-08-15: phóng lớn bảng Xem mẫu câu hỏi gần toàn màn hình và tăng cỡ chữ để dễ đọc. -->
<!-- Bản điều chỉnh 2026-08-15: bỏ combo Lớp-Môn trong Kiểm tra ngay; đưa Trình chiếu Word lên thanh điều hướng; tách nguồn Word thành Tải từ máy/Xem mẫu; mở thẳng bảng chọn số câu Mvip; nhận diện chữ a/b/c/d gạch chân và giữ gạch chân nội dung khi trình chiếu. -->
<!-- Bản điều chỉnh 2026-08-15: Đúng-Sai hiện Đ xanh/S đỏ khi xem đáp án; tô đỏ phương án đúng sau khi xem kết quả; thêm Xem đáp án cho Kiểm tra ngay; hiện combo Lớp-Môn ở Trình chiếu Word thu nhỏ. -->
<!-- Bản điều chỉnh 2026-08-15: đồng bộ đầy đủ môn/lớp 4-12 theo index.htmlTLB6; tăng MathType 1,3 lần ở Kiểm tra ngay/Từng câu và 2 lần với công thức 1 dòng ở Tất cả. -->
<!-- Bản điều chỉnh 2026-08-14: ép toàn bộ phương án A/B/C/D của câu trắc nghiệm thành 01 cột trong Kiểm tra ngay và Trình chiếu Word. -->
<!-- Bản điều chỉnh 2026-08-14: căn giữa theo chiều cao ô cho nhãn A/B/C/D; ô một dòng căn giữa cả chữ và công thức. -->
<!-- Bản điều chỉnh 2026-08-14: cân đối kích thước MathType theo kích thước gốc trong Word; sửa ngoặc một phía và căn trái hệ điều kiện. -->
<!-- MVIP_SINGLE_CHOICE_BANK_TEMPLATE_2026_07_13 -->
<!-- V5: làm nổi bật hai nút Đăng ký và Đăng nhập trên thanh điều hướng -->
<!-- Bản điều chỉnh 2026-07-25: nút sang câu dạng mũi tên; tự cấp mã học sinh còn thiếu; đánh dấu học sinh bỏ học -->
<!-- Bản điều chỉnh 2026-07-30: mục Soạn đề cương luôn dùng ngân hàng đề của MVIP; không yêu cầu nhập Word -->
<!-- Bản điều chỉnh 2026-07-31: nút Đóng bảng Hướng dẫn đồng thời thoát chế độ toàn màn hình. -->
<!-- Bản điều chỉnh 2026-08-01: bấm mũi tên phải sẽ chuyển câu và tự mở chế độ Toàn màn hình; nếu đã toàn màn hình thì chỉ chuyển câu và chạy lại đồng hồ. -->
<!-- Bản điều chỉnh 2026-08-12: chỉ hiện Xem HD khi câu hiện tại có Hướng dẫn giải; tự thoát toàn màn hình khi nhận kết quả quét realtime từ điện thoại. -->
<!-- Bản điều chỉnh 2026-08-13: ô số câu bấm vào số 0 sẽ trống để nhập trực tiếp; tăng chiều rộng ô trong Soạn đề kiểm tra, Soạn đề cương và Kiểm tra ngay. -->
<!-- Bản điều chỉnh 2026-08-14: sau Lưu/Hủy câu Đúng-Sai ẩn nút Quét của ý; đổi Xem KQ thành Xem kết quả; đưa nút kết quả sát nút X khi toàn màn hình; ẩn nhãn loại câu. -->
<!-- Bản điều chỉnh 2026-08-14: nhãn Câu/A-B-C-D/a-b-c-d màu xanh; tối ưu cảnh báo tài khoản miễn phí; hiện combo Lớp-Môn trong toàn màn hình cho trial/full. -->
<!-- Bản điều chỉnh 2026-08-14: các thao tác xem/chuyển câu/quét vùng tự mở toàn màn hình; bổ sung thông báo Đăng nhập hoặc Nâng cấp MVIP trong Trình chiếu Word. -->
<!-- Bản điều chỉnh 2026-08-13: chuyển Toàn màn hình/Thu nhỏ theo một bố cục nguyên tử; co chữ đồng bộ ngay, không còn giật hai nấc. -->
<!-- Bản điều chỉnh 2026-08-13: Trình chiếu Word mặc định ở bố cục thu nhỏ như Kiểm tra ngay; khi thoát toàn màn hình hoặc nhận tín hiệu thẻ sẽ trở lại bố cục này. -->
<!-- Bản điều chỉnh 2026-08-13: Trình chiếu Word chấm câu nhiều lựa chọn theo thẻ ở chế độ trial/full; bỏ ô Lớp-Môn trong cửa sổ trình chiếu; chuyển Toàn màn hình/Thu nhỏ chỉ bằng một lần bấm. -->
<!-- Bản điều chỉnh 2026-08-01: bổ sung nút Xem HD trên thanh trình chiếu, đặt ngay bên trái ô Số giây. -->
<!-- Bản điều chỉnh 2026-07-31: file ngân hàng đề cương tô đỏ toàn bộ phương án đúng (kể cả A/B/C/D) và xuất Hướng dẫn giải nếu nguồn có -->


<html lang="vi">
<head>
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<script async src="https://www.googletagmanager.com/gtag/js?id=G-1Q4DL3XRR6"></script>
<script>
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<!-- Bản 2026-08-14: nhúng bộ đọc EMF; thêm PNG dự phòng cho image258.emf; chỉ báo lỗi khi cả hai đường xử lý thất bại. -->
<meta charset="utf-8"/>
<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
<!-- Bản điều chỉnh 2026-07-17 v5: tự động đặt lại số câu khi mở Dùng câu hỏi Mvip/Biên soạn ma trận -->
<title>MVIP - Dạy học tương tác. Kiểm tra trắc nghiệm bằng thẻ</title>
<meta content="Trình chiếu tài liệu thành bài giảng tương tác. Kiểm tra trắc nghiệm bằng thẻ MVIP. Thống kê, xuất báo cáo kết quả kiểm tra" name="description"/>
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<meta content="website" property="og:type"/>
<meta content="https://mvip.vn/" property="og:url"/>
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<meta content="summary" name="twitter:card"/>
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<meta content="Trình chiếu tài liệu thành bài giảng tương tác. Kiểm tra trắc nghiệm bằng thẻ MVIP. Thống kê, xuất báo cáo kết quả kiểm tra" name="twitter:description"/>
<link href="https://mvip.vn/" rel="canonical"/>
<script type="application/ld+json">
{
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" rel="icon" type="image/x-icon"/>
<style>
    :root {
      --bg: #f3f7fd;
      --card: #ffffff;
      --line: #dbe4f0;
      --text: #0f172a;
      --muted: #64748b;
      --primary: #2563eb;
      --primary-2: #1d4ed8;
      --success: #16a34a;
      --danger: #dc2626;
      --warn: #ea580c;
      --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
      --radius: 22px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: 'Times New Roman', Times, serif;
      background: linear-gradient(180deg, #eef4ff 0%, #f8fbff 100%);
      color: var(--text);
    }
    a { color: inherit; text-decoration: none; }
    .container { width: min(1240px, calc(100% - 28px)); margin: 0 auto; }

    .topbar {
      position: sticky; top: 0; z-index: 1000;
      background: rgba(255,255,255,0.92);
      border-bottom: 1px solid #e5edf6;
      backdrop-filter: blur(12px);
    }
    .topbar-inner {
      min-height: 74px;
      display: flex; align-items: center; justify-content: space-between; gap: 16px;
    }
    .brand {
      display: flex; align-items: center; gap: 12px; font-weight: 800;
    }
    .brand-badge {
      width: 44px; height: 44px; border-radius: 14px;
      background: #ffffff;
      display: grid; place-items: center;
      border: 1px solid #dbe4f0;
      box-shadow: 0 12px 24px rgba(37,99,235,.12);
      overflow: hidden;
      padding: 4px;
    }
    .brand-badge img {
      width: 100%; height: 100%; object-fit: contain; display: block;
    }
    .brand-text small { display:block; color: var(--muted); font-size: 12px; font-weight: 700; }
    .nav { display:flex; align-items:center; gap: 14px; flex-wrap: wrap; }
    .nav a { color:#334155; font-weight:700; font-size:14px; }
    .nav a:hover { color: var(--primary); }
    .nav a.nav-guide-action {
      display:inline-flex; align-items:center; justify-content:center;
      min-height:38px; padding:0 15px; border-radius:12px;
      border:1px solid #1d4ed8;
      background:linear-gradient(135deg,#2563eb,#3b82f6);
      color:#fff !important; font-weight:900; line-height:1; white-space:nowrap;
      box-shadow:0 8px 18px rgba(37,99,235,.22);
      animation:mvipGuideNavBlink 1.15s ease-in-out infinite;
      transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
    }
    .nav a.nav-guide-action:hover {
      color:#fff !important; transform:translateY(-2px); filter:brightness(1.05);
      box-shadow:0 12px 26px rgba(37,99,235,.34);
    }
    .nav a.nav-guide-action:active { transform:translateY(0); }
    .nav a.nav-guide-action:focus-visible {
      outline:3px solid rgba(37,99,235,.30); outline-offset:3px;
    }
    @keyframes mvipGuideNavBlink {
      0%,100% { filter:brightness(1); box-shadow:0 8px 18px rgba(37,99,235,.22); }
      50% { filter:brightness(1.24); box-shadow:0 0 0 4px rgba(59,130,246,.18),0 12px 28px rgba(37,99,235,.38); }
    }
    @media (prefers-reduced-motion: reduce) {
      .nav a.nav-guide-action { animation:none; }
    }
    .nav a.nav-auth-action {
      display:inline-flex; align-items:center; justify-content:center;
      min-height:38px; padding:0 15px; border-radius:12px;
      border:1px solid transparent; color:#fff; font-weight:900;
      line-height:1; white-space:nowrap;
      box-shadow:0 8px 18px rgba(15,23,42,.16);
      transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
    }
    .nav a.nav-auth-action:hover {
      color:#fff; transform:translateY(-2px); filter:brightness(1.04);
      box-shadow:0 12px 24px rgba(15,23,42,.22);
    }
    .nav a.nav-auth-action:active {
      transform:translateY(0); box-shadow:0 5px 12px rgba(15,23,42,.16);
    }
    .nav a.nav-auth-action:focus-visible {
      outline:3px solid rgba(37,99,235,.28); outline-offset:3px;
    }
    .nav a.nav-register-action {
      background:linear-gradient(135deg,#2563eb,#60a5fa);
      border-color:#1d4ed8;
    }
    .nav a.nav-login-action {
      background:linear-gradient(135deg,#0f766e,#2dd4bf);
      border-color:#0f766e;
    }
    .nav .nav-word-presentation-action {
      display:inline-flex; align-items:center; justify-content:center;
      min-height:38px; padding:0 15px; border-radius:12px;
      border:1px solid #0369a1; background:linear-gradient(135deg,#0284c7,#38bdf8);
      color:#fff; font-weight:900; line-height:1; white-space:nowrap; cursor:pointer;
      box-shadow:0 8px 18px rgba(3,105,161,.20);
      transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
    }
    .nav .nav-word-presentation-action:hover:not(:disabled) {
      transform:translateY(-2px); filter:brightness(1.04);
      box-shadow:0 12px 24px rgba(3,105,161,.26);
    }
    .nav .nav-word-presentation-action:active:not(:disabled) { transform:translateY(0); }
    .nav .nav-word-presentation-action:focus-visible {
      outline:3px solid rgba(14,165,233,.28); outline-offset:3px;
    }
    .nav .nav-word-presentation-action:disabled { opacity:.62; cursor:wait; transform:none; }
    .class-manage-btn { height: 30px; padding: 0 10px; border-radius: 8px; border:1px solid #cbd5e1; background:#fff; color:#334155; font-size:12px; font-weight:700; white-space:nowrap; cursor:pointer; }
    .class-manage-btn:hover:not(:disabled) { border-color:#60a5fa; color:#1d4ed8; background:#f8fbff; }
    .class-manage-btn:disabled { cursor:not-allowed; opacity:.55; }
    .menu-wrap { position: relative; }
    .menu-btn {
      height: 36px; padding: 0 12px; border-radius: 10px; border:1px solid #cbd5e1; background:#fff; color:#334155;
      font-size:13px; font-weight:700; white-space:nowrap; cursor:pointer;
    }
    .menu-btn:hover:not(:disabled) { border-color:#60a5fa; color:#1d4ed8; background:#f8fbff; }
    .menu-btn:disabled { cursor:not-allowed; opacity:.55; }
    .menu-panel {
      position:absolute; top: calc(100% + 6px); right: 0; min-width: 220px; padding: 8px; border-radius: 14px;
      border:1px solid #dbe4f0; background:#fff; box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12); z-index: 1100; display:none;
    }
    .menu-wrap.open .menu-panel { display:grid; gap: 6px; }
    .menu-item {
      display:block; box-sizing:border-box; width:100%; text-align:left; padding: 10px 12px; border-radius: 10px;
      border:1px solid transparent; background:#fff; color:#334155; font-size:14px; font-weight:700;
      line-height:normal; text-decoration:none; cursor:pointer;
    }
    .menu-item:hover:not(:disabled) { background:#f8fbff; border-color:#dbe4f0; color:#1d4ed8; }
    .menu-item:disabled { cursor:not-allowed; opacity:.55; }
    .nav-logout-btn { padding:8px 12px; border-radius:12px; font-size:14px; background:#dc2626; color:#fff; border:1px solid #dc2626; }
    .nav-logout-btn:hover:not(:disabled) { background:#b91c1c; border-color:#b91c1c; }
    .nav-logout-btn:disabled { background:#fca5a5; border-color:#fca5a5; color:#fff; cursor:not-allowed; }
    .nav-btn {
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:14px; font-weight:800; border:1px solid transparent; cursor:pointer;
      transition:.2s ease;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #3b82f6); color:#fff;
      box-shadow: 0 12px 24px rgba(37,99,235,.22);
    }
    .btn-primary:hover { transform: translateY(-1px); }
    .btn-outline { background:#fff; border-color:#cfdceb; color:#0f172a; }
    .btn-outline:hover { background:#f8fbff; }
    .btn-soft { background:#eff6ff; color:#1d4ed8; border-color:#bfdbfe; }
    button { font: inherit; }

    .hero {
      padding: 34px 0 18px;
    }
    .hero-grid {
      display:grid; grid-template-columns: 0.94fr 1.06fr; gap:22px; align-items: stretch;
    }
    .panel {
      background: var(--card); border:1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow);
    }
    .hero-card { padding: 28px; }
    .tag {
      display:inline-block; padding:9px 14px; border-radius:999px;
      background:#dbeafe; color:#1d4ed8; font-size:13px; font-weight:800; margin-bottom:16px;
    }
    .hero-title {
      font-size: 46px; line-height: 1.06; margin: 0 0 14px; font-weight: 800; letter-spacing: -1px;
    }
    .hero-title .accent {
      background: linear-gradient(135deg, #2563eb, #06b6d4);
      -webkit-background-clip: text; background-clip:text; -webkit-text-fill-color: transparent;
    }
    .hero-text { color: #475569; font-size: 18px; margin: 0 0 22px; }
    .hero-list { display:grid; gap: 10px; margin: 0; padding:0; list-style:none; }
    .hero-list li { display:flex; gap: 10px; color:#334155; }
    .hero-list b { color:#0f172a; }
    .hero-right { padding: 24px; background: linear-gradient(180deg, #0f172a 0%, #16233c 100%); color:white; }
    .hero-right h3 { margin:0 0 14px; font-size: 24px; }
    .hero-right p { color:#cbd5e1; }

    .intro-showcase {
      position:relative;
      overflow:hidden;
      padding:56px 0 72px;
      font-family:Arial, Helvetica, sans-serif;
      background:
        radial-gradient(circle at 88% 8%, rgba(34,211,238,.17), transparent 30%),
        radial-gradient(circle at 10% 24%, rgba(37,99,235,.12), transparent 34%),
        linear-gradient(180deg, #f8fbff 0%, #ffffff 42%, #f6faff 100%);
      isolation:isolate;
    }
    .intro-showcase::before,
    .intro-showcase::after {
      content:"";
      position:absolute;
      z-index:-1;
      border-radius:999px;
      filter:blur(2px);
      pointer-events:none;
    }
    .intro-showcase::before {
      width:340px; height:340px; top:120px; right:-210px;
      border:64px solid rgba(59,130,246,.07);
    }
    .intro-showcase::after {
      width:210px; height:210px; top:690px; left:-150px;
      border:46px solid rgba(20,184,166,.07);
    }
    #gioi-thieu { scroll-margin-top:90px; }
    #gioi-thieu .intro-shell { padding:0 4px; }
    #gioi-thieu .intro-hero-grid {
      display:grid;
      grid-template-columns:minmax(0,.9fr) minmax(500px,1.1fr);
      gap:58px;
      align-items:center;
    }
    #gioi-thieu .intro-copy { min-width:0; padding:24px 0; }
    #gioi-thieu .intro-chip {
      display:inline-flex;
      align-items:center;
      gap:9px;
      margin:0 0 22px;
      padding:9px 14px;
      border:1px solid #bfdbfe;
      border-radius:999px;
      background:rgba(239,246,255,.92);
      color:#1d4ed8;
      font-size:12px;
      font-weight:800;
      letter-spacing:.035em;
      text-transform:uppercase;
      box-shadow:0 8px 24px rgba(37,99,235,.08);
    }
    #gioi-thieu .intro-chip-dot {
      width:8px; height:8px; border-radius:50%; background:#14b8a6;
      box-shadow:0 0 0 5px rgba(20,184,166,.12);
    }
    #gioi-thieu .intro-title {
      margin:0 0 21px;
      max-width:690px;
      color:#0b1735;
      font-size:58px;
      line-height:1.02;
      font-weight:900;
      letter-spacing:-2.5px;
      text-wrap:balance;
    }
    #gioi-thieu .intro-brand-name {
      display:block;
      width:max-content;
      margin-bottom:10px;
      font-size:19px;
      line-height:1;
      letter-spacing:.25em;
      color:#2563eb;
    }
    #gioi-thieu .title-line { display:block; }
    #gioi-thieu .intro-title-accent {
      width:max-content;
      max-width:100%;
      background:linear-gradient(110deg,#1d4ed8 3%,#0284c7 51%,#0f766e 100%);
      -webkit-background-clip:text;
      background-clip:text;
      -webkit-text-fill-color:transparent;
    }
    #gioi-thieu .intro-text {
      max-width:640px;
      margin:0;
      color:#52617a;
      font-size:18px;
      line-height:1.72;
    }
    #gioi-thieu .intro-actions {
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:30px;
    }
    #gioi-thieu .intro-action {
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:50px;
      padding:0 20px;
      border:1px solid transparent;
      border-radius:14px;
      font-size:15px;
      font-weight:800;
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    #gioi-thieu .intro-action svg { width:18px; height:18px; }
    #gioi-thieu .intro-action:hover { transform:translateY(-2px); }
    #gioi-thieu .intro-action-primary {
      color:#fff;
      background:linear-gradient(135deg,#1d4ed8,#0284c7);
      box-shadow:0 14px 28px rgba(29,78,216,.22);
    }
    #gioi-thieu .intro-action-primary:hover { box-shadow:0 18px 34px rgba(29,78,216,.3); }
    #gioi-thieu .intro-action-secondary {
      color:#14213d;
      border-color:#d7e2f0;
      background:rgba(255,255,255,.84);
      box-shadow:0 8px 20px rgba(15,23,42,.06);
    }
    #gioi-thieu .intro-proof-list {
      display:flex;
      flex-wrap:wrap;
      gap:11px 20px;
      margin-top:25px;
      color:#52617a;
      font-size:13px;
      font-weight:700;
    }
    #gioi-thieu .intro-proof-list span { display:inline-flex; align-items:center; gap:7px; }
    #gioi-thieu .intro-proof-list svg { width:17px; height:17px; color:#0f9f84; flex:0 0 auto; }

    #gioi-thieu .intro-product-visual { position:relative; min-width:0; padding:30px 6px 40px; }
    #gioi-thieu .intro-product-visual::before {
      content:"";
      position:absolute;
      inset:0 4% 6% 8%;
      z-index:-1;
      border-radius:50%;
      background:linear-gradient(135deg,rgba(37,99,235,.18),rgba(45,212,191,.2));
      filter:blur(46px);
    }
    #gioi-thieu .intro-app-window {
      overflow:hidden;
      border:1px solid rgba(148,163,184,.35);
      border-radius:23px;
      background:#fff;
      box-shadow:0 32px 70px rgba(15,23,42,.18), 0 2px 5px rgba(15,23,42,.06);
      transform:perspective(1100px) rotateY(-2deg) rotateX(1deg);
      transform-origin:center;
    }
    #gioi-thieu .intro-app-topbar {
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      min-height:48px;
      padding:0 15px;
      border-bottom:1px solid #e6edf6;
      background:#f9fbfe;
    }
    #gioi-thieu .intro-window-dots { display:flex; gap:6px; }
    #gioi-thieu .intro-window-dots i { width:8px; height:8px; border-radius:50%; background:#cbd5e1; }
    #gioi-thieu .intro-window-dots i:nth-child(1) { background:#fca5a5; }
    #gioi-thieu .intro-window-dots i:nth-child(2) { background:#fcd34d; }
    #gioi-thieu .intro-window-dots i:nth-child(3) { background:#6ee7b7; }
    #gioi-thieu .intro-app-label { color:#34445f; font-size:11px; font-weight:800; }
    #gioi-thieu .intro-app-status {
      display:inline-flex; align-items:center; gap:6px; color:#0f766e; font-size:10px; font-weight:800;
    }
    #gioi-thieu .intro-app-status::before { content:""; width:7px; height:7px; border-radius:50%; background:#14b8a6; }
    #gioi-thieu .intro-app-body { display:grid; grid-template-columns:minmax(0,1fr) 138px; min-height:330px; }
    #gioi-thieu .intro-app-canvas {
      position:relative;
      padding:33px 30px 29px;
      border-right:1px solid #e7edf5;
      background:
        linear-gradient(rgba(226,232,240,.34) 1px, transparent 1px),
        #fff;
      background-size:100% 38px;
    }
    #gioi-thieu .intro-live-chip {
      display:inline-flex; align-items:center; gap:6px;
      padding:6px 9px; border-radius:8px; background:#eff6ff; color:#2563eb;
      font-size:9px; font-weight:900; letter-spacing:.04em; text-transform:uppercase;
    }
    #gioi-thieu .intro-live-chip::before { content:""; width:6px; height:6px; border-radius:50%; background:#2563eb; }
    #gioi-thieu .intro-lesson-kicker { margin-top:24px; color:#0284c7; font-size:10px; font-weight:900; letter-spacing:.12em; }
    #gioi-thieu .intro-app-canvas h3 { margin:8px 0 13px; color:#0f172a; font:700 20px/1.32 Georgia, 'Times New Roman', serif; }
    #gioi-thieu .intro-question-text { margin:0; color:#334155; font:15px/1.55 Georgia, 'Times New Roman', serif; }
    #gioi-thieu .intro-math-row { display:flex; align-items:center; gap:10px; margin:17px 0; color:#0f172a; font:italic 18px Georgia, 'Times New Roman', serif; }
    #gioi-thieu .intro-fraction { display:inline-grid; grid-template-rows:auto auto; min-width:52px; text-align:center; line-height:1.12; }
    #gioi-thieu .intro-fraction span:first-child { padding:0 7px 3px; border-bottom:1.4px solid currentColor; }
    #gioi-thieu .intro-fraction span:last-child { padding-top:3px; }
    #gioi-thieu .intro-answer-grid { display:grid; grid-template-columns:1fr 1fr; gap:9px; margin-top:18px; }
    #gioi-thieu .intro-answer-grid span {
      padding:9px 11px; border:1px solid #e2e8f0; border-radius:9px; background:#fff;
      color:#334155; font:700 12px Georgia, 'Times New Roman', serif;
    }
    #gioi-thieu .intro-answer-grid span:nth-child(2) { border-color:#93c5fd; background:#eff6ff; color:#1d4ed8; }
    #gioi-thieu .intro-scan-panel { padding:25px 14px; background:#f8fbff; text-align:center; }
    #gioi-thieu .intro-scan-head { color:#64748b; font-size:10px; font-weight:800; }
    #gioi-thieu .intro-scan-total { display:block; margin:10px 0 1px; color:#0f172a; font-size:32px; line-height:1; }
    #gioi-thieu .intro-scan-total span { color:#94a3b8; font-size:14px; }
    #gioi-thieu .intro-scan-sub { color:#64748b; font-size:9px; }
    #gioi-thieu .intro-result-bars { display:grid; gap:11px; margin-top:24px; text-align:left; }
    #gioi-thieu .intro-result-row { display:grid; grid-template-columns:13px 1fr 16px; gap:6px; align-items:center; color:#64748b; font-size:9px; font-weight:800; }
    #gioi-thieu .intro-result-track { height:6px; overflow:hidden; border-radius:99px; background:#e2e8f0; }
    #gioi-thieu .intro-result-track i { display:block; height:100%; border-radius:inherit; background:#93c5fd; }
    #gioi-thieu .intro-result-row:nth-child(2) .intro-result-track i { background:#14b8a6; }
    #gioi-thieu .intro-result-row:nth-child(1) .intro-result-track i { width:34%; }
    #gioi-thieu .intro-result-row:nth-child(2) .intro-result-track i { width:78%; }
    #gioi-thieu .intro-result-row:nth-child(3) .intro-result-track i { width:45%; }
    #gioi-thieu .intro-result-row:nth-child(4) .intro-result-track i { width:25%; }
    #gioi-thieu .intro-tool-row {
      display:flex; align-items:center; gap:8px; min-height:50px; padding:8px 13px;
      border-top:1px solid #e6edf6; background:#fbfdff;
    }
    #gioi-thieu .intro-tool {
      display:inline-flex; align-items:center; gap:5px; padding:6px 8px; border:1px solid #e2e8f0;
      border-radius:8px; color:#52617a; background:#fff; font-size:9px; font-weight:800;
    }
    #gioi-thieu .intro-tool svg { width:12px; height:12px; color:#2563eb; }
    #gioi-thieu .intro-float-card {
      position:absolute;
      display:flex; align-items:center; gap:8px;
      border:1px solid rgba(203,213,225,.75);
      border-radius:13px;
      background:rgba(255,255,255,.95);
      color:#19304f;
      box-shadow:0 16px 36px rgba(15,23,42,.14);
      backdrop-filter:blur(10px);
      font-size:11px;
      font-weight:800;
    }
    #gioi-thieu .intro-float-formula { left:-18px; bottom:13px; padding:10px 13px; }
    #gioi-thieu .intro-float-formula b { color:#2563eb; font:italic 18px Georgia,serif; }
    #gioi-thieu .intro-float-response { right:-8px; top:8px; padding:10px 13px; }
    #gioi-thieu .intro-float-response svg { width:18px; height:18px; color:#0f9f84; }

    #gioi-thieu .intro-format-strip {
      display:grid;
      grid-template-columns:1.1fr repeat(4,minmax(0,1fr));
      align-items:center;
      gap:0;
      margin-top:58px;
      padding:18px 12px;
      border:1px solid #e0e9f4;
      border-radius:18px;
      background:rgba(255,255,255,.78);
      box-shadow:0 14px 34px rgba(15,23,42,.06);
    }
    #gioi-thieu .intro-format-lead { padding:0 17px; color:#52617a; font-size:12px; font-weight:800; }
    #gioi-thieu .intro-format-item { display:flex; align-items:center; justify-content:center; gap:8px; min-height:34px; border-left:1px solid #e2e8f0; color:#243653; font-size:12px; font-weight:800; }
    #gioi-thieu .intro-format-icon { display:grid; place-items:center; width:27px; height:27px; border-radius:8px; color:#fff; font-size:10px; font-weight:900; }
    #gioi-thieu .intro-format-item:nth-child(2) .intro-format-icon { background:#2563eb; }
    #gioi-thieu .intro-format-item:nth-child(3) .intro-format-icon { background:#ef4444; }
    #gioi-thieu .intro-format-item:nth-child(4) .intro-format-icon { background:#16a34a; }
    #gioi-thieu .intro-format-item:nth-child(5) .intro-format-icon { background:#f97316; }

    #gioi-thieu .intro-section { padding-top:92px; }
    #gioi-thieu .intro-section-heading { display:grid; grid-template-columns:minmax(0,.75fr) minmax(280px,.5fr); gap:40px; align-items:end; margin-bottom:32px; }
    #gioi-thieu .intro-eyebrow { display:block; margin-bottom:11px; color:#2563eb; font-size:12px; font-weight:900; letter-spacing:.12em; text-transform:uppercase; }
    #gioi-thieu .intro-section-heading h2 { margin:0; color:#0b1735; font-size:38px; line-height:1.12; letter-spacing:-1.2px; }
    #gioi-thieu .intro-section-heading p { margin:0; color:#64748b; font-size:16px; line-height:1.65; }
    #gioi-thieu .intro-feature-grid { display:grid; grid-template-columns:repeat(12,minmax(0,1fr)); gap:16px; }
    #gioi-thieu .intro-feature-card {
      grid-column:span 4;
      min-height:235px;
      padding:24px;
      border:1px solid #e1eaf4;
      border-radius:20px;
      background:rgba(255,255,255,.9);
      box-shadow:0 12px 30px rgba(15,23,42,.055);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    #gioi-thieu .intro-feature-card:hover { transform:translateY(-4px); border-color:#bfdbfe; box-shadow:0 20px 38px rgba(37,99,235,.1); }
    #gioi-thieu .intro-feature-card.intro-feature-wide { grid-column:span 8; }
    #gioi-thieu .intro-feature-card.intro-feature-compact { grid-column:span 3; }
    #gioi-thieu .intro-feature-card.intro-feature-blue { color:#fff; border-color:#1d4ed8; background:linear-gradient(140deg,#1e40af,#0284c7); }
    #gioi-thieu .intro-feature-card.intro-feature-blue h3 { color:#fff; }
    #gioi-thieu .intro-feature-card.intro-feature-blue p { color:#dbeafe; }
    #gioi-thieu .intro-feature-card.intro-feature-blue .intro-feature-icon { color:#fff; background:rgba(255,255,255,.14); border-color:rgba(255,255,255,.18); }
    #gioi-thieu .intro-feature-card.intro-feature-mint { background:linear-gradient(145deg,#f0fdfa,#ffffff 68%); }
    #gioi-thieu .intro-feature-icon { display:grid; place-items:center; width:48px; height:48px; margin-bottom:25px; border:1px solid #dbeafe; border-radius:14px; color:#2563eb; background:#eff6ff; }
    #gioi-thieu .intro-feature-icon svg { width:24px; height:24px; }
    #gioi-thieu .intro-feature-card h3 { margin:0 0 10px; color:#12213e; font-size:19px; line-height:1.3; }
    #gioi-thieu .intro-feature-card p { margin:0; color:#64748b; font-size:14px; line-height:1.62; }
    #gioi-thieu .intro-feature-tags { display:flex; flex-wrap:wrap; gap:8px; margin-top:22px; }
    #gioi-thieu .intro-feature-tags span { padding:6px 9px; border-radius:999px; background:rgba(255,255,255,.13); color:#eff6ff; font-size:10px; font-weight:800; }

    #gioi-thieu .intro-flow {
      position:relative;
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
      padding:34px;
      overflow:hidden;
      border-radius:26px;
      color:#fff;
      background:#0d1b35;
      box-shadow:0 24px 56px rgba(15,23,42,.16);
    }
    #gioi-thieu .intro-flow::after { content:""; position:absolute; right:-70px; bottom:-100px; width:260px; height:260px; border-radius:50%; background:rgba(14,165,233,.16); }
    #gioi-thieu .intro-flow-head { grid-column:1 / -1; display:flex; align-items:end; justify-content:space-between; gap:24px; margin-bottom:10px; }
    #gioi-thieu .intro-flow-head h2 { margin:0; font-size:32px; letter-spacing:-.7px; }
    #gioi-thieu .intro-flow-head p { max-width:420px; margin:0; color:#b9c7db; font-size:14px; line-height:1.6; }
    #gioi-thieu .intro-flow-step { position:relative; z-index:1; padding:24px 20px; border:1px solid rgba(255,255,255,.1); border-radius:18px; background:rgba(255,255,255,.055); }
    #gioi-thieu .intro-flow-number { display:grid; place-items:center; width:34px; height:34px; margin-bottom:30px; border:1px solid rgba(125,211,252,.35); border-radius:10px; color:#7dd3fc; background:rgba(14,165,233,.12); font-size:12px; font-weight:900; }
    #gioi-thieu .intro-flow-step h3 { margin:0 0 9px; font-size:17px; }
    #gioi-thieu .intro-flow-step p { margin:0; color:#b9c7db; font-size:13px; line-height:1.6; }

    #gioi-thieu .intro-final-cta {
      display:grid;
      grid-template-columns:minmax(0,1fr) auto;
      gap:28px;
      align-items:center;
      margin-top:70px;
      padding:34px 38px;
      border:1px solid #cfe3fa;
      border-radius:24px;
      background:linear-gradient(115deg,#eef6ff,#ecfeff 58%,#f0fdfa);
    }
    #gioi-thieu .intro-final-cta h2 { margin:0 0 8px; color:#0b1735; font-size:30px; line-height:1.2; letter-spacing:-.6px; }
    #gioi-thieu .intro-final-cta p { margin:0; color:#5a6b84; font-size:14px; line-height:1.55; }
    #gioi-thieu .intro-final-actions { display:flex; gap:10px; }

    @media (max-width:1080px) {
      #gioi-thieu .intro-hero-grid { grid-template-columns:1fr; gap:24px; }
      #gioi-thieu .intro-copy { max-width:760px; padding-bottom:0; }
      #gioi-thieu .intro-title { max-width:760px; }
      #gioi-thieu .intro-product-visual { width:min(100%,760px); margin:0 auto; }
      #gioi-thieu .intro-format-strip { margin-top:36px; }
      #gioi-thieu .intro-feature-card.intro-feature-compact { grid-column:span 6; }
    }
    @media (max-width:760px) {
      .intro-showcase { padding:34px 0 46px; }
      #gioi-thieu .container { width:min(100%,calc(100% - 28px)); }
      #gioi-thieu .intro-shell { padding:0; }
      #gioi-thieu .intro-copy { padding-top:8px; }
      #gioi-thieu .intro-chip { margin-bottom:18px; font-size:10px; }
      #gioi-thieu .intro-title { font-size:43px; line-height:1.04; letter-spacing:-1.7px; }
      #gioi-thieu .intro-brand-name { font-size:16px; }
      #gioi-thieu .intro-text { font-size:16px; line-height:1.65; }
      #gioi-thieu .intro-action { min-height:47px; padding:0 17px; font-size:14px; }
      #gioi-thieu .intro-product-visual { padding:25px 0 36px; }
      #gioi-thieu .intro-app-window { transform:none; }
      #gioi-thieu .intro-float-formula { left:-7px; }
      #gioi-thieu .intro-float-response { right:-5px; }
      #gioi-thieu .intro-format-strip { grid-template-columns:1fr 1fr; padding:10px; }
      #gioi-thieu .intro-format-lead { grid-column:1 / -1; padding:7px 8px 15px; text-align:center; }
      #gioi-thieu .intro-format-item { margin:4px 0; border-left:0; }
      #gioi-thieu .intro-section { padding-top:68px; }
      #gioi-thieu .intro-section-heading { grid-template-columns:1fr; gap:14px; }
      #gioi-thieu .intro-section-heading h2 { font-size:32px; }
      #gioi-thieu .intro-feature-card,
      #gioi-thieu .intro-feature-card.intro-feature-wide,
      #gioi-thieu .intro-feature-card.intro-feature-compact { grid-column:span 6; }
      #gioi-thieu .intro-flow { grid-template-columns:1fr; padding:27px 22px; }
      #gioi-thieu .intro-flow-head { grid-column:auto; display:block; }
      #gioi-thieu .intro-flow-head h2 { margin-bottom:10px; font-size:28px; }
      #gioi-thieu .intro-flow-number { margin-bottom:18px; }
      #gioi-thieu .intro-final-cta { grid-template-columns:1fr; padding:28px 24px; }
      #gioi-thieu .intro-final-actions { flex-wrap:wrap; }
    }
    @media (max-width:560px) {
      #gioi-thieu .container { width:min(100%,calc(100% - 22px)); }
      #gioi-thieu .intro-title { font-size:36px; letter-spacing:-1.3px; }
      #gioi-thieu .intro-text { font-size:15px; }
      #gioi-thieu .intro-actions { display:grid; grid-template-columns:1fr; }
      #gioi-thieu .intro-proof-list { display:grid; }
      #gioi-thieu .intro-app-body { grid-template-columns:1fr; min-height:300px; }
      #gioi-thieu .intro-app-canvas { padding:27px 20px 24px; border-right:0; }
      #gioi-thieu .intro-scan-panel { display:none; }
      #gioi-thieu .intro-tool-row { overflow:hidden; }
      #gioi-thieu .intro-tool { white-space:nowrap; }
      #gioi-thieu .intro-tool:nth-child(n+4) { display:none; }
      #gioi-thieu .intro-float-card { font-size:9px; }
      #gioi-thieu .intro-float-response { top:4px; }
      #gioi-thieu .intro-float-formula { bottom:10px; }
      #gioi-thieu .intro-section-heading h2 { font-size:29px; }
      #gioi-thieu .intro-feature-card,
      #gioi-thieu .intro-feature-card.intro-feature-wide,
      #gioi-thieu .intro-feature-card.intro-feature-compact { grid-column:1 / -1; min-height:0; }
      #gioi-thieu .intro-final-cta h2 { font-size:26px; }
      #gioi-thieu .intro-final-actions { display:grid; grid-template-columns:1fr; }
    }

    @media (prefers-reduced-motion:reduce) {
      #gioi-thieu .intro-action,
      #gioi-thieu .intro-feature-card { transition:none; }
      #gioi-thieu .intro-app-window { transform:none; }
    }

    .intro-showcase-legacy[hidden] { display:none !important; }
    .intro-brief {
      padding:54px 0 64px;
      font-family:Arial, Helvetica, sans-serif;
      background:
        radial-gradient(circle at 92% 0%, rgba(34,211,238,.12), transparent 30%),
        linear-gradient(180deg,#f7fbff 0%,#ffffff 100%);
    }
    .intro-brief-shell {
      display:grid;
      grid-template-columns:minmax(0,1.65fr) minmax(270px,.85fr);
      column-gap:18px;
      row-gap:22px;
      max-width:960px;
      margin:0 auto;
    }
    .intro-brief-hero {
      display:contents;
    }
    .intro-brief-heading {
      position:relative;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      grid-column:1 / -1;
      grid-row:1;
      min-height:164px;
      padding:8px 24px 12px;
      text-align:center;
    }
    .intro-brief-heading > :not(.intro-brief-book) {
      position:relative;
      z-index:2;
    }
    .intro-brief-brand {
      margin:0 0 10px;
      color:#1d4ed8;
      font-size:60px;
      line-height:1;
      font-weight:900;
      letter-spacing:.05em;
    }
    .intro-brief-book {
      --book-cover:#2563eb;
      --book-accent:#7c3aed;
      position:absolute;
      top:50%;
      z-index:1;
      display:block;
      width:124px;
      height:auto;
      color:#1e3a8a;
      pointer-events:none;
      filter:drop-shadow(0 10px 10px rgba(30,64,175,.18));
      transform:translateY(-50%);
    }
    .intro-brief-book-left { left:16px; }
    .intro-brief-book-right {
      right:16px;
      --book-cover:#7c3aed;
      --book-accent:#2563eb;
    }
    .intro-brief-book svg { display:block; width:100%; height:auto; overflow:visible; }
    .intro-brief-book .book-shadow { fill:rgba(15,23,42,.12); }
    .intro-brief-book .book-cover-left { fill:var(--book-cover); }
    .intro-brief-book .book-cover-right { fill:var(--book-accent); }
    .intro-brief-book .book-page { fill:#fffdf8; stroke:#cbd5e1; stroke-width:1.5; }
    .intro-brief-book .book-page-edge { fill:none; stroke:#93a4bc; stroke-linecap:round; stroke-width:1.5; }
    .intro-brief-book .book-spine { fill:none; stroke:#1e3a8a; stroke-linecap:round; stroke-width:2.2; }
    .intro-brief-title {
      margin:0;
      color:#10203d;
      font-size:28px;
      line-height:1.22;
      font-weight:900;
      letter-spacing:-.45px;
    }
    .intro-brief-slogan {
      margin:9px 0 0;
      color:#3f506b;
      font-family:Georgia, 'Times New Roman', serif;
      font-size:18px;
      line-height:1.45;
      font-style:italic;
    }
    .intro-classroom-visual {
      grid-column:2;
      grid-row:2;
      align-self:center;
      width:100%;
      min-height:0;
      margin:0;
      overflow:hidden;
      border:1px solid #d7e4f2;
      border-radius:16px;
      background:#eaf3fb;
      box-shadow:0 10px 28px rgba(15,23,42,.1);
    }
    .intro-classroom-visual img {
      display:block;
      width:100%;
      height:auto;
      min-height:0;
      aspect-ratio:16 / 9;
      object-fit:cover;
      object-position:center;
    }
    .intro-brief-list {
      display:grid;
      grid-column:1 / -1;
      grid-row:2;
      grid-template-columns:repeat(2,minmax(0,1fr));
      /* Cột 1 có thêm Bài giảng ở hàng cuối; cột 2 giữ ba mục và dùng
         Vòng quay may mắn đúng vị trí Bài giảng cũ. */
      grid-template-rows:repeat(5,minmax(62px,auto));
      grid-auto-flow:column;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .intro-brief-item {
      display:grid;
      grid-template-columns:44px minmax(0,1fr);
      gap:14px;
      align-items:center;
      min-height:62px;
      padding:10px 14px 10px 10px;
      border:1px solid #e1eaf4;
      border-radius:15px;
      background:rgba(255,255,255,.86);
      color:#22324d;
      font-size:18px;
      line-height:1.45;
      box-shadow:0 8px 22px rgba(15,23,42,.045);
    }
    .intro-brief-icon {
      display:grid;
      place-items:center;
      width:42px;
      height:42px;
      border-radius:12px;
      color:#2563eb;
      background:#eff6ff;
    }
    .intro-brief-icon svg { width:22px; height:22px; }
    .intro-brief-item:nth-child(2) .intro-brief-icon { color:#0284c7; background:#f0f9ff; }
    .intro-brief-item:nth-child(4) .intro-brief-icon { color:#0f766e; background:#f0fdfa; }
    .intro-brief-item:nth-child(5) .intro-brief-icon { color:#7c3aed; background:#f5f3ff; }
    .intro-brief-item.is-action {
      display:block;
      min-height:0;
      padding:0;
      overflow:hidden;
    }
    .intro-brief-action {
      display:grid;
      grid-template-columns:44px minmax(0,1fr) 30px;
      gap:14px;
      align-items:center;
      width:100%;
      min-height:62px;
      padding:10px 12px 10px 10px;
      border:0;
      background:transparent;
      color:#1e3a5f;
      font:800 18px/1.45 Arial, Helvetica, sans-serif;
      text-align:left;
      cursor:pointer;
      transition:background .18s ease, color .18s ease, transform .18s ease;
    }
    .intro-brief-action:hover { background:#f4f8ff; color:#1d4ed8; }
    .intro-brief-action:active { transform:translateY(1px); }
    .intro-brief-action:focus-visible { outline:3px solid rgba(37,99,235,.3); outline-offset:-3px; }
    .intro-brief-action-arrow {
      display:grid;
      place-items:center;
      width:28px;
      height:28px;
      border-radius:9px;
      color:#2563eb;
      background:#eaf2ff;
    }
    .intro-brief-action-arrow svg { width:16px; height:16px; }
    #introUnifiedPresentationBtn {
      background:linear-gradient(135deg,#2563eb 0%,#1d4ed8 100%);
      color:#fff;
    }
    #introUnifiedPresentationBtn:hover {
      background:linear-gradient(135deg,#1d4ed8 0%,#1e40af 100%);
      color:#fff;
    }
    #introQuestionPresentationBtn {
      background:linear-gradient(135deg,#7c3aed 0%,#6d28d9 100%);
      color:#fff;
    }
    #introQuestionPresentationBtn:hover {
      background:linear-gradient(135deg,#6d28d9 0%,#5b21b6 100%);
      color:#fff;
    }
    #introMvipCheckBtn {
      background:linear-gradient(135deg,#ec4899 0%,#db2777 100%);
      color:#fff;
    }
    #introMvipCheckBtn:hover {
      background:linear-gradient(135deg,#db2777 0%,#be185d 100%);
      color:#fff;
    }
    #introLessonPlanBtn {
      background:linear-gradient(135deg,#16a34a 0%,#15803d 100%);
      color:#fff;
    }
    #introLessonPlanBtn:hover {
      background:linear-gradient(135deg,#15803d 0%,#166534 100%);
      color:#fff;
    }
    #introDrawingLabel {
      grid-column:2;
      grid-row:4;
      border-color:#0891b2;
      background:linear-gradient(135deg,#2dd4bf 0%,#0ea5e9 100%);
      color:#fff;
      box-shadow:0 10px 24px rgba(8,145,178,.24);
    }
    #introCardCheckLabel {
      grid-column:2;
      grid-row:1;
      border-color:#1d4ed8;
      background:linear-gradient(135deg,#38bdf8 0%,#2563eb 100%);
      color:#fff;
      box-shadow:0 10px 24px rgba(37,99,235,.25);
    }
    #introMagicWheelLabel {
      grid-column:2;
      grid-row:2;
      border-color:#ea580c;
      background:linear-gradient(135deg,#fb923c 0%,#f97316 100%);
      color:#fff;
      box-shadow:0 10px 24px rgba(249,115,22,.25);
    }
    #introQuestionBankLabel {
      grid-column:2;
      grid-row:3;
      border-color:#7c3aed;
      background:linear-gradient(135deg,#c084fc 0%,#7c3aed 100%);
      color:#fff;
      box-shadow:0 10px 24px rgba(124,58,237,.25);
    }
    #introDrawingLabel,
    #introCardCheckLabel,
    #introMagicWheelLabel,
    #introQuestionBankLabel {
      text-shadow:0 1px 1px rgba(15,23,42,.2);
    }
    #introDrawingLabel .intro-brief-icon,
    #introCardCheckLabel .intro-brief-icon,
    #introMagicWheelLabel .intro-brief-icon,
    #introQuestionBankLabel .intro-brief-icon {
      color:#fff;
      background:rgba(255,255,255,.2);
      box-shadow:inset 0 0 0 1px rgba(255,255,255,.22);
    }
    #introUnifiedPresentationBtn .intro-brief-icon,
    #introUnifiedPresentationBtn .intro-brief-action-arrow,
    #introQuestionPresentationBtn .intro-brief-icon,
    #introMvipCheckBtn .intro-brief-icon,
    #introLessonPlanBtn .intro-brief-icon,
    #introQuestionPresentationBtn .intro-brief-action-arrow,
    #introMvipCheckBtn .intro-brief-action-arrow,
    #introLessonPlanBtn .intro-brief-action-arrow {
      color:#fff;
      background:rgba(255,255,255,.16);
    }
    #introLessonPlanItem[hidden] { display:none !important; }
    #documentPresentationQuestionBtn {
      border-color:#7c3aed !important;
      background:#7c3aed !important;
      color:#fff !important;
    }
    #documentPresentationQuestionBtn:hover { background:#6d28d9 !important; }
    #wordPresentationStartBtn,
    #lessonPlanStartBtn,
    .scan-mode-row > #examModeEnterBtn,
    .scan-mode-row > #regularTestStartBtn {
      display:none !important;
    }
    #studentBoard { position:relative !important; }
    #studentBoard.has-mvip-empty-classroom { min-height:420px; }
    .mvip-no-class-classroom[hidden] { display:none !important; }
    .mvip-no-class-classroom {
      position:absolute;
      inset:0;
      z-index:5;
      overflow:hidden;
      border-radius:inherit;
      background:#eef6ff;
      pointer-events:none;
    }
    .mvip-no-class-classroom img {
      display:block;
      width:100%;
      height:100%;
      object-fit:cover;
      object-position:center center;
    }
    .intro-mvip-check-modal[hidden] { display:none !important; }
    .intro-mvip-check-modal {
      position:fixed;
      inset:0;
      z-index:2147482500;
      display:grid;
      place-items:center;
      padding:20px;
      font-family:Arial, Helvetica, sans-serif;
    }
    .intro-mvip-check-backdrop {
      position:absolute;
      inset:0;
      background:rgba(15,23,42,.58);
      backdrop-filter:blur(3px);
    }
    .intro-mvip-check-dialog {
      position:relative;
      width:min(520px,100%);
      padding:24px;
      border:1px solid #ddd6fe;
      border-radius:20px;
      background:#fff;
      box-shadow:0 26px 70px rgba(15,23,42,.28);
    }
    .intro-mvip-check-head {
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:16px;
      margin-bottom:18px;
    }
    .intro-mvip-check-head h3 {
      margin:0;
      color:#32155f;
      font-size:22px;
      line-height:1.3;
    }
    .intro-mvip-check-close {
      flex:0 0 auto;
      width:36px;
      height:36px;
      border:0;
      border-radius:10px;
      background:#f3e8ff;
      color:#6d28d9;
      font:800 22px/1 Arial, sans-serif;
      cursor:pointer;
    }
    .intro-mvip-check-select {
      width:100%;
      min-height:46px;
      padding:0 12px;
      border:1px solid #c4b5fd;
      border-radius:12px;
      background:#fff;
      color:#1f2937;
      font:700 16px/1.3 Arial, sans-serif;
    }
    .intro-mvip-check-actions {
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:12px;
      margin-top:14px;
    }
    .intro-mvip-check-action {
      min-height:46px;
      padding:10px 14px;
      border:1px solid #7c3aed;
      border-radius:12px;
      background:#7c3aed;
      color:#fff;
      font:800 15px/1.3 Arial, sans-serif;
      cursor:pointer;
    }
    .intro-mvip-check-action:hover { background:#6d28d9; }
    .intro-mvip-check-action:disabled,
    .intro-mvip-check-select:disabled {
      cursor:not-allowed;
      opacity:.5;
    }
    .intro-mvip-check-status {
      min-height:20px;
      margin:12px 2px 0;
      color:#64748b;
      font-size:13px;
      line-height:1.4;
    }
    body.intro-mvip-check-open { overflow:hidden; }
    #wordPresentationSampleOpenBtn { display:none !important; }
    #wordPresentationChoiceModal .regular-choice-dialog {
      display:flex;
      flex-direction:column;
      width:min(1180px,calc(100vw - 28px));
      max-height:calc(100vh - 28px);
    }
    #wordPresentationChoiceModal .regular-choice-body {
      min-height:0;
      overflow:auto;
    }
    #wordPresentationChoiceModal .regular-choice-actions {
      grid-template-columns:1fr;
    }
    #wordPresentationChoiceModal #wordPresentationChoiceLocalBtn {
      width:100%;
    }
    #wordPresentationChoiceModal .regular-sample-body {
      display:block;
      flex:none;
      min-height:0;
      padding:8px 0 0;
      overflow:auto;
      background:transparent;
    }
    #wordPresentationChoiceModal .regular-sample-title { margin:0 0 12px; }
    #wordPresentationChoiceModal .regular-sample-table {
      height:auto;
      min-width:900px;
    }
    .intro-exam-guide-modal[hidden] { display:none !important; }
    .intro-exam-guide-modal {
      position:fixed;
      inset:0;
      z-index:2147482600;
      display:grid;
      place-items:center;
      padding:20px;
      font-family:Arial, Helvetica, sans-serif;
    }
    .intro-exam-guide-backdrop {
      position:absolute;
      inset:0;
      background:rgba(15,23,42,.6);
      backdrop-filter:blur(3px);
    }
    .intro-exam-guide-dialog {
      position:relative;
      width:min(900px,100%);
      max-height:calc(100vh - 40px);
      overflow:auto;
      padding:24px 28px 28px;
      border:1px solid #bfdbfe;
      border-radius:20px;
      background:#fff;
      box-shadow:0 26px 70px rgba(15,23,42,.3);
    }
    .intro-exam-guide-head {
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding-bottom:14px;
      border-bottom:1px solid #e2e8f0;
    }
    .intro-exam-guide-head h3 {
      margin:0;
      color:#0f172a;
      font-size:24px;
    }
    .intro-exam-guide-close {
      width:38px;
      height:38px;
      border:0;
      border-radius:10px;
      background:#eff6ff;
      color:#1d4ed8;
      font:800 23px/1 Arial, sans-serif;
      cursor:pointer;
    }
    .intro-exam-guide-message {
      margin:18px 0;
      padding:13px 16px;
      border-left:5px solid #f59e0b;
      border-radius:10px;
      background:#fffbeb;
      color:#92400e;
      font-size:19px;
      font-weight:800;
    }
    .intro-exam-guide-lead {
      margin:0 0 8px;
      color:#334155;
      font-size:17px;
      line-height:1.45;
    }
    .intro-exam-guide-dialog h4 {
      margin:18px 0 14px;
      color:#0f172a;
      font-family:Georgia,'Times New Roman',serif;
      font-size:26px;
      text-align:center;
    }
    .intro-exam-guide-dialog ol {
      margin:0;
      padding-left:30px;
      color:#111827;
      font-family:Georgia,'Times New Roman',serif;
      font-size:20px;
      line-height:1.5;
    }
    .intro-exam-guide-dialog li { margin:9px 0; padding-left:4px; }
    .scan-controls-left > #cv7991DashboardMagicWheelBtn {
      flex:0 0 auto;
      margin:0;
      align-self:center;
    }
    @media (max-width:760px) {
      .intro-brief { padding:36px 0 44px; }
      #gioi-thieu.intro-brief .container { width:min(100%,calc(100% - 28px)); }
      .intro-brief-shell { grid-template-columns:1fr; row-gap:20px; }
      .intro-brief-heading { min-height:150px; padding:8px 20px 12px; }
      .intro-brief-brand { font-size:54px; }
      .intro-brief-book { width:78px; }
      .intro-brief-book-left { left:4px; }
      .intro-brief-book-right { right:4px; }
      .intro-brief-title { font-size:27px; letter-spacing:-.5px; }
      .intro-brief-slogan { font-size:18px; }
      .intro-brief-list {
        grid-column:1;
        grid-row:2;
        grid-template-columns:1fr;
        grid-template-rows:none;
        grid-auto-flow:row;
      }
      #introDrawingLabel,
      #introCardCheckLabel,
      #introMagicWheelLabel,
      #introQuestionBankLabel {
        grid-column:auto;
        grid-row:auto;
      }
      .intro-classroom-visual { grid-column:1; grid-row:3; width:min(100%,540px); justify-self:center; }
      .intro-brief-item { grid-template-columns:40px minmax(0,1fr); min-height:58px; font-size:16px; }
      .intro-brief-action { grid-template-columns:40px minmax(0,1fr) 28px; min-height:58px; font-size:16px; }
      .intro-brief-icon { width:38px; height:38px; }
    }
    @media (max-width:480px) {
      .intro-brief-heading { min-height:142px; padding:8px 14px 12px; }
      .intro-brief-brand { font-size:49.5px; }
      .intro-brief-book { width:52px; }
      .intro-brief-book-left { left:0; }
      .intro-brief-book-right { right:0; }
      .intro-brief-title { font-size:24px; }
      .intro-brief-slogan { font-size:16px; }
      .intro-brief-item { padding:10px; font-size:15px; }
      .intro-brief-item.is-action { padding:0; }
      .intro-brief-action { gap:10px; padding:10px; font-size:15px; }
      .intro-mvip-check-actions { grid-template-columns:1fr; }
      .intro-mvip-check-dialog { padding:20px; }
      .intro-exam-guide-dialog { padding:18px; }
      .intro-exam-guide-head h3 { font-size:21px; }
      .intro-exam-guide-message { font-size:16px; }
      .intro-exam-guide-dialog h4 { font-size:21px; }
      .intro-exam-guide-dialog ol { padding-left:24px; font-size:16px; }
    }
    .mini-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; margin-top: 18px; }
    .mini {
      background: rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.08);
      border-radius: 18px; padding: 16px;
    }
    .mini strong { display:block; font-size: 26px; margin-bottom: 3px; }
    .mini span { color:#cbd5e1; font-size: 14px; }

    .block { padding: 18px 0 26px; }
    .section-head { margin-bottom: 16px; }
    .section-head .eyebrow {
      display:inline-block; background:#dbeafe; color:#1d4ed8; font-weight:800; font-size:13px;
      border-radius:999px; padding:8px 12px; margin-bottom: 10px;
    }
    .section-head h2 { margin:0 0 8px; font-size: 32px; }
    #dang-nhap #mvipLearningMotto {
      width:100%; color:#1d4ed8 !important; text-align:center;
      white-space:normal !important; overflow:visible !important; text-overflow:clip !important;
    }
    body.word-presentation-scan-split #dang-nhap .section-head:has(> #mvipLearningMotto) {
      display:flex !important; align-items:center; justify-content:center; height:100%;
    }
    body.word-presentation-scan-split #dang-nhap #mvipLearningMotto {
      margin:0 !important; font-size:clamp(18px, 2.1vw, 28px) !important; line-height:1.15 !important;
    }
    .section-head p { margin:0; color:#64748b; }

    .auth-shell { display:grid; grid-template-columns: 420px 1fr; gap: 20px; align-items: start; }
    .auth-card, .dashboard-card { padding: 24px; }
    .auth-card h3, .dashboard-card h3 { margin:0 0 6px; font-size: 24px; }
    .sub { margin: 0 0 18px; color: var(--muted); }

    .field-grid { display:grid; gap: 16px; }
    .field label { display:block; font-size:14px; font-weight:800; color:#334155; margin-bottom:8px; }
    .field input, .field select {
      width:100%; padding: 14px 15px; border-radius: 14px; border:1px solid #cbd5e1; background:#fff;
      outline:none; font-size:15px; transition: .2s ease;
    }
    .field input:focus, .field select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,.10); }
    .saved-account-combo {
      position: relative;
      width: 100%;
      min-width: 0;
    }
    .saved-account-combo > input {
      padding-right: 52px !important;
    }
    .saved-account-toggle {
      position: absolute;
      z-index: 3;
      top: 50%;
      right: 6px;
      width: 40px;
      height: 38px;
      padding: 0;
      border: 0;
      border-radius: 10px;
      background: transparent;
      color: #334155;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transform: translateY(-50%);
      cursor: pointer;
    }
    .saved-account-toggle:hover,
    .saved-account-toggle:focus-visible {
      background: #eff6ff;
      color: #1d4ed8;
    }
    .saved-account-toggle:focus-visible {
      outline: 2px solid #2563eb;
      outline-offset: 1px;
    }
    .saved-account-toggle svg {
      width: 22px;
      height: 22px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
      pointer-events: none;
      transition: transform .16s ease;
    }
    .saved-account-combo.is-open .saved-account-toggle svg {
      transform: rotate(180deg);
    }
    .saved-account-menu[hidden] { display: none !important; }
    .saved-account-menu {
      position: absolute;
      z-index: 1200;
      left: 0;
      right: 0;
      top: calc(100% + 6px);
      max-height: min(260px, 42vh);
      overflow-y: auto;
      overscroll-behavior: contain;
      padding: 6px;
      border: 1px solid #93c5fd;
      border-radius: 12px;
      background: #fff;
      box-shadow: 0 18px 42px rgba(15,23,42,.22);
    }
    .saved-account-option {
      display: block;
      width: 100%;
      min-height: 40px;
      padding: 9px 11px;
      border: 0;
      border-radius: 9px;
      background: transparent;
      color: #0f172a;
      text-align: left;
      font: inherit;
      font-weight: 700;
      overflow-wrap: anywhere;
      cursor: pointer;
    }
    .saved-account-option:hover,
    .saved-account-option:focus-visible,
    .saved-account-option.is-selected {
      background: #eff6ff;
      color: #1d4ed8;
      outline: none;
    }
    .saved-account-empty {
      padding: 9px 11px;
      color: #64748b;
      font-size: 13px;
      line-height: 1.4;
    }
    .register-inline-grid { gap: 14px; }
    .register-inline-grid .field {
      display: grid;
      grid-template-columns: 150px minmax(0, 1fr);
      align-items: center;
      gap: 14px;
    }
    .register-inline-grid .field label {
      margin-bottom: 0;
    }
    .register-inline-grid .field input {
      padding: 13px 15px;
    }
    .register-inline-grid .field input[readonly] {
      background: #f1f5f9;
      color: #475569;
      cursor: not-allowed;
    }
    .password-input-wrap {
      position: relative;
      width: 100%;
      min-width: 0;
    }
    .password-input-wrap input {
      padding-right: 50px !important;
    }
    .password-toggle {
      position: absolute;
      top: 50%;
      right: 7px;
      transform: translateY(-50%);
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      border: 0;
      border-radius: 10px;
      background: transparent;
      color: #64748b;
      cursor: pointer;
    }
    .password-toggle:hover {
      background: #eef2ff;
      color: #1d4ed8;
    }
    .password-toggle:focus-visible {
      outline: 2px solid #2563eb;
      outline-offset: 2px;
    }
    .password-toggle svg {
      width: 21px;
      height: 21px;
      fill: none;
      stroke: currentColor;
      stroke-width: 1.9;
      stroke-linecap: round;
      stroke-linejoin: round;
      pointer-events: none;
    }
    .password-toggle .eye-off-icon { display: none; }
    .password-toggle.is-visible .eye-icon { display: none; }
    .password-toggle.is-visible .eye-off-icon { display: block; }
    .register-email-input-stack {
      display:grid;
      gap:7px;
      min-width:0;
    }
    .register-email-policy-note {
      color:#64748b;
      font-size:12.5px;
      line-height:1.48;
    }
    .register-email-check-status {
      min-height:20px;
      padding:6px 9px;
      border:1px solid transparent;
      border-radius:10px;
      font-size:12.5px;
      font-weight:800;
      line-height:1.35;
      overflow-wrap:anywhere;
    }
    .register-email-check-status:empty { display:none; }
    .register-email-check-status[data-state="idle"] {
      color:#475569;
      background:#f8fafc;
      border-color:#e2e8f0;
    }
    .register-email-check-status[data-state="checking"] {
      color:#1d4ed8;
      background:#eff6ff;
      border-color:#bfdbfe;
    }
    .register-email-check-status[data-state="ok"] {
      color:#166534;
      background:#f0fdf4;
      border-color:#86efac;
    }
    .register-email-check-status[data-state="error"] {
      color:#b91c1c;
      background:#fef2f2;
      border-color:#fca5a5;
    }
    @media (max-width:760px) {
      .register-email-policy-note,
      .register-email-check-status { font-size:12px; }
    }

    .register-actions-row {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 16px;
    }
    .actions { display:flex; flex-wrap:wrap; gap: 10px; margin-top: 6px; }

    .register-notice-modal[hidden] { display: none !important; }
    .register-notice-modal {
      position: fixed;
      inset: 0;
      z-index: 2200;
      display: grid;
      place-items: center;
      padding: 18px;
    }
    .register-notice-backdrop {
      position: absolute;
      inset: 0;
      background: rgba(15, 23, 42, .58);
      backdrop-filter: blur(3px);
    }
    .register-notice-dialog {
      position: relative;
      width: min(560px, 100%);
      padding: 30px 28px 26px;
      border: 1px solid #dbeafe;
      border-radius: 24px;
      background: #fff;
      box-shadow: 0 28px 80px rgba(15, 23, 42, .30);
      text-align: center;
      animation: registerNoticeIn .18s ease-out;
    }
    @keyframes registerNoticeIn {
      from { opacity: 0; transform: translateY(10px) scale(.98); }
      to { opacity: 1; transform: translateY(0) scale(1); }
    }
    .register-notice-close {
      position: absolute;
      top: 10px;
      right: 12px;
      width: 38px;
      height: 38px;
      border: 0;
      border-radius: 50%;
      background: transparent;
      color: #64748b;
      font-size: 28px;
      line-height: 1;
      cursor: pointer;
    }
    .register-notice-close:hover { background: #f1f5f9; color: #0f172a; }
    .register-notice-icon {
      display: grid;
      place-items: center;
      width: 64px;
      height: 64px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: #dcfce7;
      color: #15803d;
      font-size: 34px;
      font-weight: 900;
    }
    .register-notice-dialog.is-error {
      border-color: #fecaca;
    }
    .register-notice-dialog.is-error .register-notice-icon {
      background: #fee2e2;
      color: #b91c1c;
    }
    .register-notice-dialog.is-info .register-notice-icon {
      background: #dbeafe;
      color: #1d4ed8;
    }
    .register-notice-title {
      margin: 0 38px 12px;
      color: #0f172a;
      font-size: 25px;
      line-height: 1.25;
    }
    .register-notice-message {
      margin: 0;
      color: #334155;
      font-size: 17px;
      line-height: 1.65;
      overflow-wrap: anywhere;
    }
    .register-notice-email {
      color: #2563eb;
      font-weight: 900;
    }
    .register-notice-ok {
      min-width: 130px;
      margin-top: 22px;
    }
    /* Email verification needs a readable, nearly full-screen instruction panel. */
    .register-notice-modal.is-verification {
      padding: clamp(8px, 2vw, 24px);
    }
    .register-notice-dialog.is-verification {
      box-sizing: border-box;
      width: 100%;
      height: 100%;
      min-width: 0;
      min-height: 0;
      max-height: 100%;
      display: grid;
      grid-template-rows: auto minmax(0, 1fr) auto;
      gap: clamp(16px, 2.5vh, 28px);
      padding: clamp(20px, 3.5vw, 52px);
      overflow: hidden;
    }
    .register-notice-dialog.is-verification .register-notice-icon { display: none; }
    .register-notice-dialog.is-verification .register-notice-title {
      margin: 0 32px;
      color: #c81e1e;
      font-size: clamp(28px, 3.6vw, 56px);
      line-height: 1.2;
      text-wrap: balance;
    }
    .register-notice-dialog.is-verification .register-notice-message {
      min-width: 0;
      min-height: 0;
      display: flex;
      flex-direction: column;
      padding: 4px 8px;
      overflow: auto;
      overscroll-behavior: contain;
      text-align: left;
      color: #111827;
      font-size: clamp(24px, 2.8vw, 42px);
      line-height: 1.45;
    }
    .register-notice-steps {
      margin: auto 0;
      padding: .25em 0 .25em 1.35em;
    }
    .register-notice-steps li + li { margin-top: .65em; }
    .register-notice-dialog.is-verification .register-notice-email,
    .register-notice-folder {
      color: #0077b5;
      font-weight: 700;
    }
    .register-notice-dialog.is-verification .register-notice-ok {
      justify-self: center;
      margin: 0;
      padding: .4em 1.6em;
      min-width: 180px;
      min-height: 52px;
      font-size: clamp(24px, 2.4vw, 36px);
    }
    .register-notice-dialog.is-verification .register-notice-close {
      width: 44px;
      height: 44px;
      font-size: 34px;
    }
    @media (max-width: 600px) {
      .register-notice-dialog.is-verification { border-radius: 16px; padding: 20px 12px 14px; }
      .register-notice-dialog.is-verification .register-notice-title { margin: 22px 4px 0; }
    }
    body.register-notice-open { overflow: hidden; }
    .note { font-size:13px; color: var(--muted); }
    .status {
      margin-top: 16px; padding: 14px 16px; border-radius: 16px; border:1px solid transparent;
      display:none; white-space: pre-line; font-size:14px;
    }
    .status.show { display:block; }
    .status.ok { background:#f0fdf4; border-color:#86efac; color:#166534; }
    .status.err { background:#fef2f2; border-color:#fca5a5; color:#b91c1c; }
    .status.info { background:#eff6ff; border-color:#bfdbfe; color:#1d4ed8; }

    .dashboard-shell { display:grid; gap: 18px; }
    .toolbar {
      display:flex; gap: 10px; flex-wrap:wrap; justify-content: space-between; align-items: center;
      margin-bottom: 16px;
    }
    .toolbar-left, .toolbar-right { display:flex; gap: 10px; flex-wrap:wrap; align-items:center; }
    .pill {
      display:inline-flex; align-items:center; gap:8px; border-radius:999px; padding: 9px 14px;
      font-size:13px; font-weight:800; border:1px solid #dbe4f0; background:#fff;
    }
    .pill .dot { width:10px; height:10px; border-radius:50%; background:#94a3b8; }
    .pill.online .dot { background:#16a34a; box-shadow: 0 0 0 6px rgba(22,163,74,.13); }
    .pill.offline .dot { background:#dc2626; box-shadow: 0 0 0 6px rgba(220,38,38,.12); }

    .stats-grid { display:grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
    .stat { padding: 18px; border-radius: 20px; background:#fff; border:1px solid var(--line); box-shadow: var(--shadow); }
    .stat .label { color:#64748b; font-size: 13px; font-weight:700; margin-bottom: 6px; }
    .stat .value { font-size: 28px; font-weight:800; }

    .workspace { display:grid; grid-template-columns: 1.2fr 0.8fr; gap: 18px; }
    .workspace.exam-mode-expanded { grid-template-columns: minmax(0, 1fr); }
    .workspace.exam-mode-expanded .history-board { display:none !important; }
    .current-board, .history-board, .detail-board { padding: 20px; }
    .board-head {
      display:flex; justify-content: space-between; gap:12px; flex-wrap: wrap; align-items: center; margin-bottom: 14px;
    }
    .board-head h4 { margin:0; font-size: 22px; }
    .muted { color: var(--muted); }

    .summary-row { display:grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-bottom: 16px; }
    .summary-box {
      background:#f8fbff; border:1px solid #dbe4f0; border-radius: 16px; padding: 12px 14px;
    }
    .summary-box .k { color:#64748b; font-size: 12px; font-weight:800; text-transform: uppercase; }
    .summary-box .v { margin-top: 4px; font-size: 22px; font-weight:800; }

    .scan-controls {
      display:flex; justify-content:space-between; align-items:center; gap: 12px; flex-wrap: nowrap;
      margin-bottom: 14px;
    }
    .scan-controls-left, .scan-controls-right {
      display:flex; align-items:center; gap: 10px; flex-wrap: nowrap;
    }
    .answer-btn {
      min-width: 40px; height: 36px; border-radius: 10px; border:1px solid #cbd5e1; background:#fff;
      color:#475569; font-weight:800; cursor:pointer; transition:.18s ease;
    }
    .answer-btn:hover:not(:disabled) { border-color:#60a5fa; color:#1d4ed8; background:#f8fbff; }
    .answer-btn:disabled { cursor:not-allowed; opacity:.55; }
    .answer-btn.active {
      background:#1d4ed8; color:#fff; border-color:#1d4ed8; box-shadow: 0 10px 20px rgba(29,78,216,.22);
    }
    .mini-control {
      display:flex; align-items:center; gap: 6px; font-size: 14px; color:#334155; font-weight:700;
    }
    .mini-control select {
      min-width: 68px; padding: 8px 10px; border-radius: 10px; border:1px solid #cbd5e1; background:#fff;
      font: inherit;
    }
    .scan-mode-row {
      display:flex; align-items:center; justify-content:flex-start; gap:8px; flex-wrap:nowrap; overflow-x:auto; margin:-6px 0 12px;
    }
    .exam-mode-toggle {
      display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:800; color:#6d28d9; user-select:none;
    }
    .exam-mode-toggle input {
      width:16px; height:16px; accent-color:#7c3aed; cursor:pointer;
    }
    .exam-mode-toggle.disabled { color:#94a3b8; }
    .exam-mode-toggle.disabled input { cursor:not-allowed; }
    .exam-mode-enter-btn {
      min-height:34px; padding:0 14px; border-radius:10px; border:1px solid #7c3aed;
      background:#f5f3ff; color:#6d28d9; font-weight:900; cursor:pointer; white-space:nowrap;
      transition:background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
    }
    .exam-mode-enter-btn:hover:not(:disabled) {
      background:#7c3aed; color:#fff; border-color:#7c3aed; transform:translateY(-1px);
    }
    .exam-mode-enter-btn:disabled { opacity:.5; cursor:not-allowed; transform:none; }
    .exam-mode-exit-btn {
      min-height:38px; min-width:92px; padding:0 18px; border-radius:10px;
      border:2px solid #2563eb; background:#fff; color:#1d4ed8;
      font-weight:900; cursor:pointer; white-space:nowrap;
    }
    .exam-mode-exit-btn:hover { background:#eff6ff; border-color:#1d4ed8; }
    .exam-mode-exit-btn[hidden] { display:none !important; }
    body.exam-mode-expanded .exam-mode-enter-btn { display:none !important; }
    body.exam-mode-expanded #regularTestStartBtn { display:none !important; }
    .exam-mode-extra {
      display:inline-flex; align-items:center; gap:8px; min-width:0;
    }
    .exam-mode-top {
      display:inline-flex; align-items:center; gap:8px; flex-wrap:nowrap;
      min-width:0;
    }
    .exam-hide-code-toggle {
      display:inline-flex; align-items:center; gap:6px; white-space:nowrap;
      font-size:12px; font-weight:800; color:#6d28d9; user-select:none;
    }
    .exam-hide-code-toggle input {
      width:15px; height:15px; accent-color:#7c3aed; cursor:pointer;
    }
    .exam-hide-code-toggle.disabled { color:#94a3b8; }
    .exam-hide-code-toggle.disabled input { cursor:not-allowed; }
    .exam-inline-control {
      display:inline-flex; align-items:center; gap:6px; white-space:nowrap;
      font-size:12px; font-weight:800; color:#334155;
    }
    .exam-inline-control select {
      min-width:64px; height:34px; padding:6px 10px; border-radius:10px; border:1px solid #cbd5e1; background:#fff;
      font:inherit; color:#334155;
    }
    .exam-inline-control.columns select { min-width:74px; }
    .exam-mode-extra[hidden] { display:none !important; }
    .exam-select-control {
      min-width:82px; height:34px; padding:6px 10px; border-radius:10px; border:1px solid #cbd5e1; background:#fff;
      font:inherit; font-weight:700; color:#334155;
    }
    .exam-question-chip {
      display:inline-flex; align-items:center; min-height:34px; padding:0 10px; border-radius:10px;
      border:1px solid #ddd6fe; background:#f5f3ff; color:#6d28d9; font-size:12px; font-weight:800;
    }
    .exam-done-btn {
      min-height:34px; padding:0 12px; border-radius:10px; border:1px solid #c4b5fd;
      background:#faf5ff; color:#6d28d9; font-size:12px; font-weight:800; cursor:pointer;
    }
    .exam-done-btn:hover:not(:disabled) { background:#f3e8ff; border-color:#a78bfa; }
    .exam-done-btn:disabled { opacity:.6; cursor:not-allowed; }
    .finish-auto-btn[hidden] { display:none !important; }
    .student-board {
      border:1px solid #dbe4f0; border-radius: 18px; background:#fff; overflow:auto; padding: 10px;
      --student-font-size: 22px;
    }
    .student-columns {
      display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 8px; align-items:start;
      min-width: 660px;
    }
    .student-board-shell { display:block; }
    .limited-tier-note {
      display:none; min-width:0; background:transparent; border:0; border-radius:18px;
      color:#fff; padding:0; box-sizing:border-box; overflow:hidden;
    }
    .limited-tier-note-inner {
      width:100%; height:100%; min-height:inherit; display:flex; align-items:stretch; justify-content:stretch;
      text-align:center;
    }
    /* LIMITED: màn hình chính vẫn giữ nguyên, không hiện thông báo. */
    body.mvip-tier-limited .student-board-shell { display:block; }
    body.mvip-tier-limited .student-board-shell .student-board {
      min-width:0; max-width:100%; overflow:auto;
    }
    body.mvip-tier-limited .student-board-shell .student-columns { min-width:0; }

    /* LIMITED + Chấm theo mã đề: 7 logo phía dưới, 2 logo bên phải và nút nâng cấp ở phần còn lại. */
    .student-board-side-stack,
    .student-board-side-ads,
    .exam-mode-ad-strip { display:none; }
    body.mvip-tier-limited.exam-mode-expanded .student-board-shell {
      display:grid;
      grid-template-columns:minmax(0, 4fr) minmax(180px, 1fr);
      grid-template-rows:minmax(0, 1fr) 100px;
      gap:8px 14px;
      align-items:stretch;
      flex:1 1 auto;
      min-height:0;
      overflow:hidden;
    }
    body.mvip-tier-limited.exam-mode-expanded .student-board-shell .student-board {
      grid-column:1;
      grid-row:1;
      min-width:0;
      width:100%;
      max-width:100%;
      min-height:0;
      max-height:none;
      overflow:auto;
    }
    body.mvip-tier-limited.exam-mode-expanded .student-board-shell .student-columns {
      min-width:0;
    }
    body.mvip-tier-limited.exam-mode-expanded .student-board-side-stack {
      grid-column:2;
      grid-row:1 / span 2;
      display:grid;
      grid-template-rows:minmax(0, 1fr) auto;
      gap:8px;
      min-width:0;
      min-height:0;
      align-self:stretch;
    }
    body.mvip-tier-limited.exam-mode-expanded .student-board-limited-note {
      display:flex;
      min-width:0;
      min-height:0;
      height:auto;
      position:static;
      top:auto;
      align-self:stretch;
    }
    body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads {
      display:grid;
      grid-template-rows:repeat(2, 92px);
      gap:8px;
      min-width:0;
    }
    body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip {
      grid-column:1;
      grid-row:2;
      display:grid;
      grid-template-columns:repeat(7, minmax(96px, 1fr));
      gap:6px;
      min-width:0;
      min-height:100px;
      padding:4px 0 0;
      overflow-x:auto;
      overflow-y:hidden;
      box-sizing:border-box;
      background:#fff;
    }
    body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip .single-exam-ad-slot,
    body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads .single-exam-ad-slot {
      min-height:92px;
    }
    .student-column {
      border:1px solid #dbe4f0; border-radius: 12px; overflow:hidden; background:#fff;
    }
    .student-line {
      min-height: calc(var(--student-font-size) * 1.35); display:flex; align-items:center; justify-content:space-between; gap: 10px;
      padding: clamp(3px, calc(var(--student-font-size) * 0.18), 8px) clamp(6px, calc(var(--student-font-size) * 0.4), 12px); border-bottom:1px solid #eef2f7; background:#fff; transition:.15s ease;
    }
    .student-line:last-child { border-bottom:none; }
    .student-line.scanned { background:#b7f7b7; }
    .student-line.correct { background:#9bd0ff; }
    .student-line.dropped { background:#f1f5f9; }
    .student-line.dropped .student-name { color:#64748b; text-decoration:line-through; text-decoration-thickness:1px; }
    .student-dropout-badge {
      display:inline-flex; align-items:center; margin-left:8px; padding:2px 7px; border:1px solid #fdba74; border-radius:999px;
      background:#fff7ed; color:#9a3412; font-size:max(11px, calc(var(--student-font-size) * .48)); font-weight:800; line-height:1.1; vertical-align:middle;
    }
    .student-line-text {
      font-size: var(--student-font-size); line-height: 1.1; color:#111827; white-space: nowrap; overflow:hidden; text-overflow: ellipsis;
      flex:1 1 auto;
    }
    .student-code {
      display:inline-block; margin-left:0; color:#7c3aed;
      font-family: inherit; font-size: inherit; line-height: inherit;
      font-weight: inherit; font-style: inherit; letter-spacing: inherit;
      vertical-align: baseline;
    }
    .student-answer-suffix {
      display:inline-block; margin-left:0;
      font-family: inherit; font-size: inherit; line-height: inherit;
      font-weight: inherit; font-style: inherit; letter-spacing: inherit;
      vertical-align: baseline;
    }
    .student-answer-suffix.correct { color:#16a34a; }
    .student-answer-suffix.wrong { color:#dc2626; }
    .student-answer { display:none !important; }
    .student-answer.hidden { display:none !important; }
    .student-table-head,
    .student-table-row {
      display:grid;
      grid-template-columns: 34px minmax(0, 1fr) 74px;
      align-items:center;
      gap: 8px;
    }
    .student-table-head {
      min-height: 30px;
      padding: 6px 8px;
      border-bottom:1px solid #e2e8f0;
      background:#f8fbff;
      font-size: 12px;
      font-weight: 800;
      color:#475569;
      text-transform: uppercase;
      letter-spacing: .02em;
    }
    .student-table-head > div:last-child {
      text-align: left;
      padding-left: 2px;
      transform: translateX(-6px);
      white-space: nowrap;
    }
    .student-table-row {
      min-height: calc(var(--student-font-size) * 1.35);
      padding: clamp(3px, calc(var(--student-font-size) * 0.18), 8px) clamp(6px, calc(var(--student-font-size) * 0.4), 12px);
      border-bottom:1px solid #eef2f7;
      background:#fff;
      transition:.15s ease;
    }
    .student-table-row:last-child { border-bottom:none; }
    .student-table-row.scanned { background:#b7f7b7; }
    .student-table-row.correct { background:#9bd0ff; }
    .student-table-row.dropped { background:#f1f5f9; }
    .student-table-row.dropped .student-cell-id,
    .student-table-row.dropped .student-cell-name { color:#64748b; text-decoration:line-through; text-decoration-thickness:1px; }
    .student-table-row.dropped .student-cell-code { color:#9a3412; font-weight:800; }
    .student-cell-id,
    .student-cell-code {
      font-size: var(--student-font-size);
      line-height: 1.1;
      color:#111827;
      white-space: nowrap;
    }
    .student-cell-name {
      min-width: 0;
      font-size: var(--student-font-size);
      line-height: 1.1;
      color:#111827;
      white-space: nowrap;
      overflow:hidden;
      text-overflow: ellipsis;
    }
    .student-cell-code {
      text-align:center;
      color:#7c3aed;
      font-weight: inherit;
    }

    .table-wrap { overflow:auto; border:1px solid #dbe4f0; border-radius: 18px; }
    table { width:100%; border-collapse: collapse; min-width: 620px; }
    th, td { padding: 12px 14px; border-bottom:1px solid #e2e8f0; text-align:left; font-size: 14px; }
    th { background:#f8fbff; position: sticky; top:0; z-index:1; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; color:#475569; }
    tbody tr { cursor:pointer; }
    tbody tr:hover { background:#f8fbff; }
    tbody tr.active { background:#eff6ff; }

    .detail-empty {
      border:1px dashed #cbd5e1; border-radius: 18px; padding: 20px; color:#64748b; background:#f8fafc;
    }
    .detail-grid { display:grid; gap: 12px; }
    .question-meta {
      display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; margin-bottom: 12px;
    }
    .meta-box { background:#f8fbff; border:1px solid #dbe4f0; border-radius: 16px; padding: 12px; }
    .meta-box .t { font-size: 12px; color:#64748b; font-weight:800; text-transform: uppercase; }
    .meta-box .n { margin-top: 4px; font-size: 21px; font-weight:800; }
    .answer-list { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
    .answer-row {
      border:1px solid #dbe4f0; border-radius: 16px; padding: 12px 14px; display:flex; justify-content:space-between; gap:12px; align-items:center;
    }
    .answer-row.right { background:#f0fdf4; border-color:#86efac; }
    .answer-row.wrong { background:#fef2f2; border-color:#fca5a5; }
    .answer-left strong { display:block; font-size:14px; }
    .answer-left span { color:#64748b; font-size:13px; }
    .answer-right {
      width:42px; height:42px; border-radius: 12px; display:grid; place-items:center; font-size: 22px; font-weight:900; border:1px solid #dbe4f0;
      background:#fff;
    }

    .empty {
      border:1px dashed #cbd5e1; background:#f8fafc; color:#64748b; border-radius: 18px; padding: 18px;
    }
    .footer { padding: 20px 0 38px; color:#64748b; }
    .hidden-red-area { display:none !important; }

    body.desktop-fixed-right #bang-dieu-khien.hidden-red-area {
      display:block !important;
      padding:0 !important;
      margin:0 !important;
      min-height:0 !important;
    }
    body.desktop-fixed-right #bang-dieu-khien.hidden-red-area > .container {
      width:0 !important;
      margin:0 !important;
      padding:0 !important;
      overflow:visible !important;
    }
    body.desktop-fixed-right #bang-dieu-khien .section-head,
    body.desktop-fixed-right #bang-dieu-khien .history-board,
    body.desktop-fixed-right #bang-dieu-khien #historyEmpty {
      display:none !important;
    }
    body.desktop-fixed-right #bang-dieu-khien .dashboard-shell,
    body.desktop-fixed-right #bang-dieu-khien .workspace {
      display:block !important;
      margin:0 !important;
      padding:0 !important;
    }

    @media (max-width: 1140px) {
      .intro-title { font-size: 38px; max-width: 100%; }
      .intro-text { max-width: 760px; }
      .auth-shell, .workspace, .hero-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 860px) {
      .intro-showcase { padding-top: 18px; }
      .intro-shell { padding-right: 0; }
      .intro-chip { font-size: 12px; padding: 9px 14px; }
      .intro-title { font-size: 32px; line-height: 1.12; letter-spacing: -0.9px; max-width: 100%; }
      .intro-text { font-size: 17px; line-height: 1.65; }
      .student-columns { grid-template-columns: 1fr 1fr !important; min-width: 560px; }
      .summary-row { grid-template-columns: repeat(3, minmax(0,1fr)); }
      .question-meta { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .answer-list { grid-template-columns: 1fr; }
      .register-inline-grid .field { grid-template-columns: 1fr; gap: 8px; }
      .register-actions-row { flex-direction: column; align-items: stretch; }
      .nav { display:none; }
    }
    @media (max-width: 560px) {
      .container { width: min(100%, calc(100% - 18px)); }
      .hero-title { font-size: 34px; }
      .stats-grid, .summary-row, .mini-grid { grid-template-columns: 1fr; }
      .student-columns { grid-template-columns: 1fr !important; min-width: 0; }
      .topbar-inner { min-height: 66px; }
      .toolbar { align-items: stretch; }
      .toolbar-left, .toolbar-right, .actions { width: 100%; }
      .nav-btn, .field input, .field select { width: 100%; }
      .question-meta { grid-template-columns: 1fr; }
    }

    body.compact-view {
      background: #f4f7fb;
    }
    body.compact-view .hero,
    body.compact-view #chi-tiet,
    body.compact-view .footer {
      display: none;
    }
    body.compact-view .topbar {
      position: sticky;
      top: 0;
    }
    body.compact-view .container {
      width: min(100%, calc(100% - 8px));
    }
    body.compact-view .topbar-inner {
      min-height: 56px;
      gap: 8px;
    }
    body.compact-view .brand-badge {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      font-size: 16px;
    }
    body.compact-view .brand-text div {
      font-size: 16px;
    }
    body.compact-view .brand-text small {
      font-size: 10px;
    }
    body.compact-view .nav {
      display: none;
    }
    body.compact-view .nav-btn {
      padding: 9px 12px;
      border-radius: 11px;
      font-size: 13px;
    }
    body.compact-view .block {
      padding: 8px 0 10px;
    }
    body.compact-view .section-head {
      margin-bottom: 8px;
    }
    body.compact-view .section-head .eyebrow,
    body.compact-view .section-head p,
    body.compact-view #dang-nhap .dashboard-card {
      display: none;
    }
    body.compact-view .section-head h2 {
      font-size: 22px;
      margin-bottom: 0;
    }
    body.compact-view .auth-shell,
    body.compact-view .workspace,
    body.compact-view .stats-grid {
      grid-template-columns: 1fr;
      gap: 8px;
    }
    body.compact-view .auth-card,
    body.compact-view .dashboard-card,
    body.compact-view .current-board,
    body.compact-view .history-board,
    body.compact-view .detail-board {
      padding: 10px;
      border-radius: 16px;
    }
    body.compact-view .auth-card h3,
    body.compact-view .dashboard-card h3,
    body.compact-view .board-head h4 {
      font-size: 18px;
    }
    body.compact-view .sub {
      margin-bottom: 10px;
      font-size: 13px;
    }
    body.compact-view .field-grid {
      gap: 10px;
    }
    body.compact-view .field label {
      margin-bottom: 6px;
      font-size: 13px;
    }
    body.compact-view .field input,
    body.compact-view .field select {
      padding: 10px 11px;
      border-radius: 10px;
      font-size: 14px;
    }
    body.compact-view .actions {
      gap: 6px;
      margin-top: 10px;
    }
    body.compact-view .toolbar {
      margin-bottom: 8px;
      gap: 8px;
      align-items: stretch;
    }
    body.compact-view .toolbar-left,
    body.compact-view .toolbar-right {
      width: 100%;
      gap: 6px;
    }
    body.compact-view .toolbar-right .field {
      flex: 1 1 150px;
      min-width: 0 !important;
      max-width: none !important;
    }
    body.compact-view .toolbar-right > button {
      flex: 1 1 calc(33.333% - 6px);
      min-width: 0;
    }
    body.compact-view .pill {
      padding: 7px 10px;
      font-size: 12px;
    }
    body.compact-view .stats-grid {
      display: none;
    }
    body.compact-view .board-head {
      margin-bottom: 6px;
    }
    body.compact-view .muted {
      font-size: 12px;
      line-height: 1.3;
    }
    body.compact-view .scan-controls {
      position: sticky;
      top: 56px;
      z-index: 8;
      margin: 0 -2px 8px;
      padding: 8px 4px 6px;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid #e2e8f0;
      backdrop-filter: blur(8px);
      gap: 6px;
    }
    body.compact-view .scan-controls-left,
    body.compact-view .scan-controls-right {
      width: 100%;
      justify-content: space-between;
      gap: 6px;
    }
    body.compact-view .scan-controls-left {
      flex-wrap: nowrap;
    }
    body.compact-view .answer-btn {
      min-width: 0;
      width: 31px;
      height: 31px;
      border-radius: 8px;
      font-size: 14px;
      flex: 0 0 auto;
    }
    body.compact-view #hideRevealBtn {
      flex: 1 1 auto;
      white-space: nowrap;
      min-width: 74px;
      padding: 8px 8px;
      font-size: 12px;
    }
    body.compact-view .mini-control {
      gap: 4px;
      font-size: 12px;
      flex: 1 1 calc(50% - 3px);
      justify-content: flex-end;
    }
    body.compact-view .mini-control select {
      min-width: 52px;
      padding: 6px 8px;
      border-radius: 8px;
      font-size: 12px;
    }
    body.compact-view .summary-row {
      grid-template-columns: repeat(5, minmax(0,1fr));
      gap: 4px;
      margin-bottom: 8px;
    }
    body.compact-view .summary-box {
      padding: 6px 4px;
      border-radius: 10px;
      text-align: center;
    }
    body.compact-view .summary-box .k {
      font-size: 9px;
    }
    body.compact-view .summary-box .v {
      margin-top: 2px;
      font-size: 18px;
    }
    body.compact-view .student-board {
      padding: 4px;
      border-radius: 12px;
      --student-font-size: 16px;
      max-height: calc(100vh - 260px);
      overflow: auto;
    }
    body.compact-view .student-columns {
      min-width: 0;
      gap: 4px;
    }
    body.compact-view .student-column {
      border-radius: 9px;
    }
    body.compact-view .student-line {
      min-height: 33px;
      padding: 3px 5px;
      gap: 5px;
    }
    body.compact-view .student-line-text {
      letter-spacing: -.2px;
    }
    body.compact-view .student-answer {
      min-width: 18px;
      font-size: calc(var(--student-font-size) * 0.88);
    }
    body.compact-view .table-wrap,
    body.compact-view .historyEmpty {
      border-radius: 12px;
    }
    body.compact-view table {
      min-width: 0;
    }
    body.compact-view th,
    body.compact-view td {
      padding: 8px 6px;
      font-size: 12px;
    }
    body.compact-view #chi-tiet {
      display: none;
    }

    @media (max-width: 620px) {
      .hero,
      #chi-tiet,
      .footer {
        display: none;
      }
      .container { width: min(100%, calc(100% - 8px)); }
      .topbar-inner { min-height: 56px; gap: 8px; }
      .brand-badge { width: 34px; height: 34px; border-radius: 10px; font-size: 16px; }
      .brand-text div { font-size: 16px; }
      .brand-text small { font-size: 10px; }
      .block { padding: 8px 0 10px; }
      .section-head { margin-bottom: 8px; }
      .section-head .eyebrow, .section-head p, #dang-nhap .dashboard-card { display:none; }
      .section-head h2 { font-size: 22px; margin-bottom:0; }
      .auth-shell, .workspace { grid-template-columns: 1fr; gap: 8px; }
      .auth-card, .dashboard-card, .current-board, .history-board { padding: 10px; border-radius: 16px; }
      .toolbar { margin-bottom: 8px; gap: 8px; align-items: stretch; }
      .toolbar-left, .toolbar-right { width: 100%; gap: 6px; }
      .toolbar-right .field { flex: 1 1 150px; min-width: 0 !important; max-width: none !important; }
      .toolbar-right > button { flex: 1 1 calc(33.333% - 6px); min-width: 0; }
      .stats-grid { display:none; }
      .board-head { margin-bottom: 6px; }
      .muted { font-size:12px; line-height:1.3; }
      .scan-controls {
        position: sticky; top: 56px; z-index: 8; margin: 0 -2px 8px; padding: 8px 4px 6px;
        background: rgba(255,255,255,.96); border-bottom: 1px solid #e2e8f0; backdrop-filter: blur(8px); gap: 6px;
      }
      .scan-controls-left, .scan-controls-right { width: 100%; justify-content: space-between; gap: 6px; }
      .scan-controls-left { flex-wrap: nowrap; }
      .answer-btn { min-width: 0; width: 31px; height: 31px; border-radius: 8px; font-size: 14px; flex: 0 0 auto; }
      #hideRevealBtn { flex:1 1 auto; min-width: 74px; padding: 8px 8px; font-size: 12px; white-space: nowrap; }
      .mini-control { gap:4px; font-size:12px; flex: 1 1 calc(50% - 3px); justify-content:flex-end; }
      .class-manage-btn { flex:1 1 auto; min-width:118px; height:31px; padding:0 8px; font-size:12px; border-radius:8px; }
      .mini-control select { min-width: 52px; padding: 6px 8px; border-radius: 8px; font-size: 12px; }
      .summary-row { grid-template-columns: repeat(5, minmax(0,1fr)); gap: 4px; margin-bottom: 8px; }
      .summary-box { padding: 6px 4px; border-radius: 10px; text-align:center; }
      .summary-box .k { font-size: 9px; }
      .summary-box .v { margin-top:2px; font-size:18px; }
      .student-board { padding:4px; border-radius:12px; --student-font-size: 16px; max-height: calc(100vh - 260px); }
      .student-columns { min-width: 0 !important; gap: 4px; }
      .student-column { border-radius: 9px; }
      .student-line { min-height: 33px; padding: 3px 5px; gap: 5px; }
      .student-answer { min-width: 18px; font-size: calc(var(--student-font-size) * 0.88); }
      .history-board { padding-top: 8px; }
      .table-wrap { border-radius: 12px; }
      table { min-width: 0; }
      th, td { padding: 8px 6px; font-size: 12px; }
      .question-meta, .answer-list { grid-template-columns: 1fr; }
    }

    .compact-toolbar { display:none; }
    .compact-toolbar-row {
      display:grid; grid-template-columns: minmax(0,1fr) 78px 76px; gap: 6px; align-items:center;
      margin-bottom: 6px;
    }
    .compact-class-wrap select,
    .compact-select select {
      width:100%; padding:8px 10px; border-radius:8px; border:1px solid #cbd5e1; background:#fff; font:inherit;
      font-size: 14px; height: 34px;
    }
    .compact-class-wrap-inline { min-width: 170px; flex: 1 1 170px; }
    .scan-controls-merged .scan-controls-left { width:100%; justify-content:flex-start; }
    .compact-select { display:flex; align-items:center; gap:5px; font-size:13px; font-weight:700; color:#334155; }
    .compact-select span { white-space:nowrap; }

    body.compact-view .topbar {
      display:none;
    }
    body.compact-view main {
      padding-top: 0;
    }
    body.compact-view .block#dang-nhap {
      padding-top: 0;
    }
    body.compact-view .container {
      width: calc(100% - 6px);
      margin: 0 3px;
    }
    body.compact-view .auth-shell {
      gap: 4px;
    }
    body.compact-view .auth-card {
      border-radius: 10px;
      padding: 8px;
    }
    body.compact-view .dashboard-card {
      padding: 3px;
      border-radius: 10px;
      border: none;
      box-shadow: none;
      background: transparent;
    }
    body.compact-view .toolbar {
      display:none;
    }
    body.compact-view .stats-grid,
    body.compact-view .history-board,
    body.compact-view #chi-tiet,
    body.compact-view .hero,
    body.compact-view .footer {
      display:none !important;
    }
    body.compact-view .workspace {
      grid-template-columns: 1fr;
      gap: 0;
    }
    body.compact-view .current-board {
      padding: 4px 3px 3px;
      border-radius: 0;
      border: none;
      box-shadow: none;
      min-height: calc(100vh - 8px);
      display: flex;
      flex-direction: column;
      background: transparent;
    }
    body.compact-view .board-head {
      display:none;
    }
    body.compact-view .compact-toolbar {
      display:block;
      position: sticky;
      top: 0;
      z-index: 20;
      background: #ffffff;
      padding: 3px 2px 4px;
      border-bottom: 1px solid #dbe4f0;
    }
    body.compact-view .scan-controls {
      position: sticky;
      top: 41px;
      z-index: 19;
      background: #ffffff;
      padding: 4px 2px 5px;
      margin: 0;
      border-bottom: 1px solid #e5edf6;
      gap: 6px;
    }
    body.compact-view .scan-controls-left,
    body.compact-view .scan-controls-right {
      width: 100%;
      justify-content: space-between;
      gap: 5px;
      flex-wrap: nowrap;
    }
    body.compact-view .scan-controls-right {
      justify-content: flex-end;
    }
    body.compact-view .answer-btn {
      width: 30px;
      min-width: 30px;
      height: 28px;
      border-radius: 6px;
      font-size: 13px;
    }
    body.compact-view #hideRevealBtn {
      display:none;
    }
    body.compact-view .mini-control {
      gap: 4px;
      font-size: 12px;
      font-weight: 700;
      white-space: nowrap;
      flex: 0 0 auto;
    }
    body.compact-view .mini-control select {
      min-width: 54px;
      height: 28px;
      padding: 4px 6px;
      border-radius: 6px;
      font-size: 12px;
    }
    body.compact-view .summary-row {
      display:none;
    }
    body.compact-view .student-board {
      flex: 1 1 auto;
      min-height: 0;
      padding: 2px;
      border-radius: 0;
      border: none;
      background: #fff;
      overflow: auto;
      --student-font-size: 22px;
    }
    body.compact-view .student-columns {
      min-width: 0;
      gap: 4px;
      grid-template-columns: repeat(3, minmax(0,1fr)) !important;
    }
    body.compact-view .student-column {
      border-radius: 0;
      border: 1px solid #9ca3af;
    }
    body.compact-view .student-line {
      min-height: 42px;
      padding: 4px 8px;
      gap: 6px;
    }
    body.compact-view .student-line-text {
      font-size: var(--student-font-size);
      line-height: 1.05;
      letter-spacing: -0.2px;
    }
    body.compact-view .student-answer {
      min-width: 22px;
      font-size: 18px;
    }
    body.compact-view #studentEmpty {
      margin-top: 6px;
      border-radius: 8px;
      padding: 10px;
      font-size: 13px;
    }
    body.compact-view .auth-card h3 {
      font-size: 18px;
      margin-bottom: 4px;
    }
    body.compact-view .sub {
      font-size: 12px;
      margin-bottom: 10px;
    }
    body.compact-view .field-grid {
      gap: 8px;
    }
    body.compact-view .field input,
    body.compact-view .field select,
    body.compact-view .nav-btn {
      height: 38px;
      padding: 8px 10px;
      border-radius: 8px;
      font-size: 14px;
    }
    body.compact-view .saved-account-combo > input {
      padding-right: 44px !important;
    }
    body.compact-view .saved-account-toggle {
      right: 3px;
      width: 34px;
      height: 32px;
      border-radius: 7px;
    }
    body.compact-view .saved-account-menu {
      top: calc(100% + 4px);
      border-radius: 9px;
      padding: 5px;
    }
    body.compact-view .saved-account-option {
      min-height: 36px;
      padding: 8px 9px;
      border-radius: 7px;
      font-size: 14px;
    }
    body.compact-view .actions {
      gap: 8px;
    }

    @media (max-width: 760px) {
      body.compact-view .student-board { --student-font-size: 20px; }
    }

    .summary-row { display:none !important; }
    .class-manager-modal[hidden] { display:none !important; }
    html.modal-open, html.modal-open body { overflow:hidden; }
    .class-manager-modal { position:fixed; inset:0; z-index:5200; }
    .class-manager-backdrop { position:absolute; inset:0; background: rgba(15,23,42,.28); }
    .class-manager-dialog { position:relative; z-index:1; width:calc(100vw - 12px); height:calc(100vh - 12px); max-height:calc(100vh - 12px); overflow:auto; margin:6px auto; background:#fff; border-radius:18px; box-shadow:0 24px 60px rgba(15,23,42,.24); border:1px solid #dbe4f0; }
    .class-manager-head { position:sticky; top:0; z-index:40; display:flex; align-items:flex-start; justify-content:space-between; gap:12px; padding:16px 18px; border-bottom:1px solid #e2e8f0; background:#fff; }
    .class-manager-head h3 { margin:0; font-size:24px; }
    .class-manager-head p { margin:6px 0 0; color:#64748b; font-size:14px; }
    .class-manager-body { padding:16px 18px 18px; }
    .class-manager-subnav { position:sticky; top:var(--class-manager-head-height, 88px); z-index:39; display:flex; gap:10px; flex-wrap:wrap; margin:-16px -18px 14px; padding:12px 18px 14px; background:#fff; border-bottom:1px solid #e2e8f0; }
    .class-manager-subbtn { appearance:none; border:1px solid #2563eb; background:#2563eb; color:#fff; border-radius:999px; padding:9px 14px; font:inherit; font-weight:700; cursor:pointer; box-shadow:0 10px 24px rgba(37,99,235,.18); }
    .class-manager-subbtn:hover { background:#1d4ed8; border-color:#1d4ed8; }
    .class-manager-subbtn.active { background:#fff; color:#0f172a; border-color:#cbd5e1; box-shadow:none; }
    .class-manager-subbtn.active:hover { background:#f8fafc; border-color:#cbd5e1; }
    .class-manager-subpanel[hidden] { display:none !important; }
    .class-manager-grid { display:grid; grid-template-columns: 220px minmax(0,1fr); gap:14px; align-items:start; }
    .class-manager-side, .class-manager-main, .exam-config-panel { display:flex; flex-direction:column; gap:12px; }
    .class-manager-list { border:1px solid #dbe4f0; border-radius:14px; padding:10px; background:#f8fbff; }
    .class-manager-roster-head { display:flex; align-items:flex-start; justify-content:space-between; gap:14px; margin-bottom:12px; padding:14px 16px; border:1px solid #dbe4f0; border-radius:16px; background:#f8fbff; }
    .class-manager-roster-head h4 { margin:0 0 4px; font-size:20px; color:#0f172a; }
    .class-manager-roster-head .nav-btn { white-space:nowrap; }
    .class-manager-list-rows { display:grid; gap:10px; }
    .class-manager-row { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px 14px; border:1px solid #dbe4f0; border-radius:14px; background:#fff; }
    .class-manager-row.active { border-color:#93c5fd; background:#eff6ff; }
    .class-manager-row-main { min-width:0; }
    .class-manager-row-title { font-weight:900; color:#0f172a; font-size:16px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
    .class-manager-row-meta { margin-top:3px; color:#64748b; font-size:13px; }
    .class-manager-row-actions { display:flex; gap:8px; flex-wrap:wrap; justify-content:flex-end; flex:0 0 auto; }
    .class-manager-row-actions .nav-btn { padding:8px 12px; border-radius:12px; }
    .class-manager-empty { border:1px dashed #cbd5e1; border-radius:14px; padding:14px 16px; color:#64748b; font-weight:700; background:#fff; }
    .class-manager-list select, .class-manager-field input, .class-manager-main textarea { width:100%; border:1px solid #cbd5e1; border-radius:10px; background:#fff; font:inherit; }
    .class-manager-list select, .class-manager-field input { height:40px; padding:8px 10px; }
    .class-manager-checklist { max-height:220px; overflow:auto; border:1px solid #cbd5e1; border-radius:12px; background:#fff; padding:8px; display:flex; flex-direction:column; gap:6px; }
    .class-manager-checklist.empty { color:#64748b; font-size:13px; justify-content:center; align-items:flex-start; }
    .class-manager-check-item { display:flex; align-items:center; gap:8px; padding:6px 8px; border-radius:10px; cursor:pointer; }
    .class-manager-check-item:hover { background:#eff6ff; }
    .class-manager-check-item input { width:18px; height:18px; margin:0; flex:0 0 auto; accent-color:#2563eb; }
    .class-manager-check-item span { color:#0f172a; line-height:1.35; }
    .class-manager-main textarea { min-height:380px; padding:10px 12px; resize:vertical; line-height:1.45; }
    .class-manager-actions, .class-manager-footer { display:flex; gap:10px; flex-wrap:wrap; }
    .class-manager-field label { display:block; margin-bottom:6px; font-weight:700; color:#334155; font-size:14px; }
    .class-manager-hint { color:#64748b; font-size:13px; }
    .class-manager-status { min-height:22px; margin-top:12px; color:#334155; font-size:14px; }
    .class-manager-status.ok { color:#15803d; }
    .class-manager-status.err { color:#b91c1c; }
    .add-class-modal[hidden] { display:none !important; }
    .add-class-modal { position:fixed; inset:0; z-index:5250; display:flex; align-items:stretch; justify-content:stretch; padding:0; }
    .add-class-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.32); backdrop-filter:blur(2px); }
    .add-class-dialog { position:relative; z-index:1; width:100vw; height:100vh; height:100dvh; max-height:100vh; max-height:100dvh; overflow:hidden; display:flex; flex-direction:column; background:#fff; border:0; border-radius:0; box-shadow:none; }
    .add-class-head { flex:0 0 auto; display:flex; align-items:flex-start; justify-content:space-between; gap:16px; padding:16px 20px; border-bottom:1px solid #e2e8f0; background:linear-gradient(180deg,#eff6ff,#fff); }
    .add-class-head h3 { margin:0; font-size:24px; color:#0f172a; }
    .add-class-head p { margin:6px 0 0; color:#64748b; font-size:14px; }
    .add-class-head-actions { display:flex; align-items:center; justify-content:flex-end; gap:10px; flex:0 0 auto; }
    .add-class-head-actions .nav-btn { min-width:76px; }
    .add-class-body { flex:1 1 auto; min-height:0; overflow:auto; padding:16px 20px 20px; display:grid; grid-template-rows:minmax(0,1fr) auto; gap:12px; }
    .add-class-table { width:100%; height:100%; border-collapse:separate; border-spacing:0; border:1px solid #dbe4f0; border-radius:16px; overflow:hidden; background:#fff; }
    .add-class-table th, .add-class-table td { border-bottom:1px solid #e2e8f0; padding:12px; vertical-align:top; }
    .add-class-table tr:last-child th, .add-class-table tr:last-child td { border-bottom:0; }
    .add-class-table th { width:210px; text-align:left; background:#f8fbff; color:#334155; font-size:14px; }
    .add-class-table label { font-weight:800; }
    .add-class-table select, .add-class-table input, .add-class-table textarea { width:100%; border:1px solid #cbd5e1; border-radius:10px; background:#fff; font:inherit; }
    .add-class-table select, .add-class-table input { height:40px; padding:8px 10px; }
    .add-class-custom-subject { margin-top:10px; }
    .add-class-custom-subject[hidden] { display:none !important; }
    .add-class-custom-subject label { display:block; margin-bottom:6px; color:#334155; font-size:14px; }
    .add-class-table tr:last-child { height:100%; }
    .add-class-table tr:last-child td { height:100%; }
    .add-class-table textarea { min-height:260px; height:100%; padding:10px 12px; resize:vertical; line-height:1.45; }
    .add-class-roster-layout { display:grid; grid-template-columns:minmax(300px,.82fr) minmax(430px,1.18fr); gap:12px; min-height:320px; height:100%; }
    .add-class-roster-pane { min-width:0; min-height:0; display:flex; flex-direction:column; gap:8px; }
    .add-class-roster-pane-title { min-height:28px; display:flex; align-items:center; justify-content:space-between; gap:10px; color:#334155; font-size:13px; font-weight:800; }
    .add-class-roster-summary { color:#64748b; font-weight:700; white-space:nowrap; }
    .add-class-roster-input-pane textarea { flex:1 1 auto; min-height:290px; height:auto; }
    .add-class-roster-input-pane textarea::placeholder { color:#94a3b8; opacity:1; font-style:italic; }
    .add-class-roster-grid { flex:1 1 auto; min-height:0; overflow:auto; border:1px solid #cbd5e1; border-radius:10px; background:#fff; }
    .add-class-roster-grid-head,
    .add-class-roster-grid-row { display:grid; grid-template-columns:82px minmax(180px,1fr) 96px; align-items:center; }
    .add-class-roster-grid-head { position:sticky; top:0; z-index:2; min-height:40px; background:#eff6ff; border-bottom:1px solid #cbd5e1; color:#334155; font-size:12px; font-weight:900; text-transform:uppercase; letter-spacing:.03em; }
    .add-class-roster-grid-head > div,
    .add-class-roster-grid-row > div,
    .add-class-roster-grid-row > label { min-width:0; padding:8px 10px; }
    .add-class-roster-grid-head > div:last-child { text-align:center; }
    .add-class-roster-grid-row { min-height:42px; border-bottom:1px solid #eef2f7; color:#0f172a; font-size:14px; }
    .add-class-roster-grid-row:last-child { border-bottom:0; }
    .add-class-roster-grid-row:hover { background:#f8fbff; }
    .add-class-roster-grid-row.is-dropped { background:#fff7ed; }
    .add-class-roster-grid-id { font-weight:900; color:#1d4ed8; white-space:nowrap; }
    .add-class-roster-grid-name { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
    .add-class-roster-grid-row.is-dropped .add-class-roster-grid-name { color:#9a3412; text-decoration:line-through; }
    .add-class-roster-drop-cell { display:flex; align-items:center; justify-content:center; cursor:pointer; }
    .add-class-table .add-class-roster-drop-cell input[type="checkbox"] { width:20px; height:20px; margin:0; padding:0; border:0; border-radius:4px; accent-color:#ea580c; cursor:pointer; }
    .add-class-roster-grid-empty { padding:20px 12px; color:#64748b; text-align:center; font-size:13px; }
    .add-class-roster-grid-empty.error { color:#b91c1c; background:#fff7f7; }
    .add-class-roster-message { min-height:20px; color:#64748b; font-size:12px; line-height:1.35; }
    .add-class-roster-message.warn { color:#9a3412; }
    .add-class-roster-message.error { color:#b91c1c; }
    .add-class-note { margin-top:6px; color:#64748b; font-size:13px; line-height:1.4; }
    .add-class-status { min-height:22px; color:#334155; font-size:14px; }
    .add-class-status.ok { color:#15803d; }
    .add-class-status.err { color:#b91c1c; }
    @media (max-width: 700px) {
      .add-class-dialog { width:100vw; height:100vh; height:100dvh; max-height:100vh; max-height:100dvh; }
      .add-class-head { padding:12px; gap:10px; }
      .add-class-head h3 { font-size:21px; }
      .add-class-head p { font-size:13px; }
      .add-class-head-actions { gap:6px; }
      .add-class-head-actions .nav-btn { min-width:0; padding:9px 12px; }
      .add-class-body { padding:10px 12px 14px; display:block; }
      .add-class-table, .add-class-table tbody, .add-class-table tr, .add-class-table th, .add-class-table td { display:block; width:100%; height:auto; }
      .add-class-table th { border-bottom:0; padding-bottom:4px; }
      .add-class-table td { padding-top:4px; }
      .add-class-table textarea { min-height:220px; height:auto; }
      .add-class-roster-layout { grid-template-columns:1fr; height:auto; min-height:0; }
      .add-class-roster-input-pane textarea { min-height:220px; }
      .add-class-roster-grid { max-height:320px; min-height:220px; }
      .add-class-roster-grid-head,
      .add-class-roster-grid-row { grid-template-columns:68px minmax(150px,1fr) 82px; }
      .add-class-roster-grid-head > div,
      .add-class-roster-grid-row > div,
      .add-class-roster-grid-row > label { padding:8px 7px; }
      .add-class-status { margin-top:10px; }
      .class-manager-roster-head, .class-manager-row { align-items:stretch; flex-direction:column; }
      .class-manager-row-actions, .class-manager-roster-head .nav-btn { width:100%; }
      .class-manager-row-actions .nav-btn { flex:1 1 auto; }
    }
    .cv7991-wrap { border:1px solid #dbe4f0; border-radius:18px; background:#fff; overflow:hidden; }
    .cv7991-head { padding:16px 18px; border-bottom:1px solid #e2e8f0; background:linear-gradient(180deg,#eff6ff,#fff); }
    .cv7991-head h4 { margin:0 0 4px; font-size:20px; color:#0f172a; }
    .cv7991-head p { margin:0; color:#64748b; font-size:14px; }
    .cv7991-body { display:grid; gap:14px; padding:16px; background:#fcfdff; }
    .cv7991-card { border:1px solid #e2e8f0; border-radius:16px; background:#fff; padding:14px; display:grid; gap:12px; }
    .cv7991-card h4 { margin:0; font-size:16px; color:#0f172a; }
    .cv7991-outline-only { display:none !important; }
    .cv7991-wrap.cv7991-outline-mode .cv7991-cv-only { display:none !important; }
    .cv7991-wrap.cv7991-outline-mode .cv7991-outline-only { display:grid !important; }
    .cv7991-wrap:not(.cv7991-outline-mode) .cv7991-outline-only { display:none !important; }
    .cv7991-wrap.cv7991-outline-mode .cv7991-card-outline-generate { display:none !important; }
    .cv7991-editor-modal.cv7991-outline-matrix-mode .cv7991-matrix-scorebar { display:none !important; }
    .cv7991-editor-modal.cv7991-outline-matrix-mode .cv7991-matrix-editor-head { justify-content:flex-end; }
    .cv7991-editor-modal.cv7991-outline-matrix-mode .cv7991-editor-actions { width:100%; margin-left:auto; justify-content:flex-end; }
    .cv7991-tools { display:flex; gap:12px; flex-wrap:wrap; align-items:center; color:#334155; font-weight:700; }
    .cv7991-tools label { display:inline-flex; align-items:center; gap:8px; }
    .cv7991-tools input[type="checkbox"] { width:18px; height:18px; accent-color:#2563eb; }
    .cv7991-table-scroll { overflow:auto; border:1px solid #dbe4f0; border-radius:14px; max-height:62vh; background:#fff; }
    .cv7991-table { width:100%; border-collapse:separate; border-spacing:0; min-width:2380px; font-size:13px; }
    .cv7991-table th, .cv7991-table td { border-right:1px solid #e2e8f0; border-bottom:1px solid #e2e8f0; padding:8px 9px; vertical-align:top; }
    .cv7991-table th { position:sticky; top:0; z-index:2; background:#eff6ff; color:#0f172a; font-weight:900; text-align:center; }
    .cv7991-table thead tr:nth-child(2) th { top:35px; background:#f8fbff; }
    .cv7991-table thead tr:nth-child(3) th { top:70px; background:#f8fbff; }
    .cv7991-table thead tr:nth-child(4) th { top:105px; background:#ffffff; }
    .cv7991-table tfoot th, .cv7991-table tfoot td {
      position:sticky; background:#ecfdf5; color:#166534; z-index:9;
      text-align:center; vertical-align:middle; font-weight:900;
    }
    .cv7991-table tfoot tr:nth-last-child(1) th,
    .cv7991-table tfoot tr:nth-last-child(1) td { bottom:0; background:#eaf2ff; color:#1d4ed8; }
    .cv7991-table tfoot tr:nth-last-child(2) th,
    .cv7991-table tfoot tr:nth-last-child(2) td { bottom:23px; background:#fff7ed; color:#9a3412; }
    .cv7991-table tfoot tr:nth-last-child(3) th,
    .cv7991-table tfoot tr:nth-last-child(3) td { bottom:46px; background:#ecfdf5; color:#166534; }
    .cv7991-table tfoot th, .cv7991-table tfoot td { padding:3px 5px !important; height:22px; line-height:1.05; }
    .cv7991-table tfoot .cv7991-footer-label { text-align:center; font-weight:900; }
    .cv7991-table td:nth-child(2) { min-width:70px; font-weight:800; color:#1e3a8a; }
    .cv7991-table td:nth-child(3) { min-width:240px; }
    .cv7991-table input[type="number"] { width:36px; border:1px solid #cbd5e1; border-radius:9px; padding:6px 7px; font:inherit; }
    .cv7991-table input[type="checkbox"] { width:18px; height:18px; accent-color:#2563eb; }
    .cv7991-table .cv7991-center { text-align:center; vertical-align:middle; }
    .cv7991-row-rate-cell { font-weight:900; color:#1d4ed8; background:#f8fbff; }

    #cv7991MatrixTable thead tr:first-child th:last-child,
    #cv7991MatrixTable tbody td.cv7991-row-rate-cell,
    #cv7991MatrixTable tfoot tr th:last-child {
      width:54px !important; min-width:54px !important; max-width:54px !important;
      padding-left:3px !important; padding-right:3px !important;
      white-space:normal; word-break:break-word;
    }
    .cv7991-spec-table { min-width:2500px; }
    .cv7991-spec-table td:nth-child(4) { min-width:420px; line-height:1.45; }
    .cv7991-spec-table td:nth-child(n+5) { min-width:74px; text-align:center; vertical-align:middle; font-weight:700; color:#334155; }
    .cv7991-spec-input { width:58px; border:1px solid #cbd5e1; border-radius:8px; padding:5px 6px; font:inherit; text-align:center; }
    #cv7991MatrixTable, #cv7991SpecTable {
      --cv7991-sticky-tt: 52px;
      --cv7991-sticky-chapter: 72px;
      --cv7991-sticky-unit: 240px;
      --cv7991-sticky-req: 440px;
    }
    #cv7991MatrixTable {
      --cv7991-sticky-chapter: 144px; /* 2/3 of former 216px */
      --cv7991-sticky-unit: 320px; /* 2/3 of former 480px */
      --cv7991-fixed-columns-width: calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit));
      width:100% !important;
      min-width:2400px !important;
      table-layout:fixed;
    }
    #cv7991MatrixTable col.cv7991-matrix-col-tt { width:var(--cv7991-sticky-tt); }
    #cv7991MatrixTable col.cv7991-matrix-col-chapter { width:var(--cv7991-sticky-chapter); }
    #cv7991MatrixTable col.cv7991-matrix-col-unit { width:var(--cv7991-sticky-unit); }
    #cv7991MatrixTable col.cv7991-matrix-col-equal { width:calc((100% - var(--cv7991-fixed-columns-width)) / 21); }
    #cv7991MatrixTable thead tr:first-child th:nth-child(1),
    #cv7991MatrixTable tbody td:nth-child(1),
    #cv7991MatrixTable tfoot th:first-child,
    #cv7991SpecTable thead tr:first-child th:nth-child(1),
    #cv7991SpecTable tbody td:nth-child(1) {
      position:sticky;
      left:0;
      width:var(--cv7991-sticky-tt);
      min-width:var(--cv7991-sticky-tt);
      max-width:var(--cv7991-sticky-tt);
      z-index:5;
      background:#fff;
    }
    #cv7991MatrixTable thead tr:first-child th:nth-child(2),
    #cv7991MatrixTable tbody td:nth-child(2),
    #cv7991SpecTable thead tr:first-child th:nth-child(2),
    #cv7991SpecTable tbody td:nth-child(2) {
      position:sticky;
      left:var(--cv7991-sticky-tt);
      width:var(--cv7991-sticky-chapter);
      min-width:var(--cv7991-sticky-chapter);
      max-width:var(--cv7991-sticky-chapter);
      z-index:5;
      background:#fff;
    }
    #cv7991MatrixTable thead tr:first-child th:nth-child(3),
    #cv7991MatrixTable tbody td:nth-child(3),
    #cv7991SpecTable thead tr:first-child th:nth-child(3),
    #cv7991SpecTable tbody td:nth-child(3) {
      position:sticky;
      left:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter));
      width:var(--cv7991-sticky-unit);
      min-width:var(--cv7991-sticky-unit);
      max-width:var(--cv7991-sticky-unit);
      z-index:5;
      background:#fff;
      box-shadow:8px 0 10px -10px rgba(15,23,42,.45);
    }
    #cv7991SpecTable thead tr:first-child th:nth-child(4),
    #cv7991SpecTable tbody td:nth-child(4) {
      position:sticky;
      left:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit));
      width:var(--cv7991-sticky-req);
      min-width:var(--cv7991-sticky-req);
      max-width:var(--cv7991-sticky-req);
      z-index:5;
      background:#fff;
      box-shadow:8px 0 10px -10px rgba(15,23,42,.45);
    }
    #cv7991MatrixTable thead tr:first-child th:nth-child(-n+3),
    #cv7991SpecTable thead tr:first-child th:nth-child(-n+4) {
      z-index:12;
      background:#eff6ff;
    }
    #cv7991MatrixTable tfoot th:first-child {
      z-index:14;
      width:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit));
      min-width:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit));
      max-width:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit));
      background:#ecfdf5;
      box-shadow:8px 0 10px -10px rgba(15,23,42,.45);
    }
    #cv7991SpecFilterMatrixBtn.active {
      background:#dbeafe;
      border-color:#60a5fa;
      color:#1d4ed8;
    }
    .cv7991-step-title { margin:0; font-size:17px; color:#2563eb; font-weight:900; }
    .cv7991-card h4.cv7991-step-title { color:#2563eb; }
    .cv7991-form-grid { display:grid; grid-template-columns:repeat(2,minmax(240px,1fr)); gap:12px; align-items:end; }
    .cv7991-title-picker-row { grid-template-columns:auto minmax(260px,1fr); align-items:center; }
    .cv7991-title-picker-row label { min-width:0; }
    .cv7991-title-picker-row .nav-btn { align-self:center; min-height:40px; }
    .cv7991-title-selected-display { min-height:40px; display:flex; align-items:center; border:1px dashed #cbd5e1; border-radius:12px; padding:9px 12px; background:#f8fafc; color:#64748b; font-weight:800; line-height:1.35; }
    .cv7991-title-selected-display.has-value { border-style:solid; border-color:#bfdbfe; background:#eff6ff; color:#1e3a8a; }

    .cv7991-form-grid label, .cv7991-bank-source label { display:grid; gap:6px; font-weight:800; color:#0f172a; }
    .cv7991-form-grid select, .cv7991-form-grid input, .cv7991-bank-source select, .cv7991-bank-source input { border:1px solid #cbd5e1; border-radius:12px; padding:10px 12px; font:inherit; background:#fff; }
    .cv7991-title-table-scroll { overflow:auto; border:1px solid #e2e8f0; border-radius:14px; background:#fff; max-height:46vh; }
    .cv7991-title-table { width:100%; min-width:520px; border-collapse:collapse; font-size:14px; }
    .cv7991-title-table th, .cv7991-title-table td { border:1px solid #e2e8f0; padding:9px 10px; vertical-align:top; }
    .cv7991-title-table th { background:#eff6ff; color:#1d4ed8; font-weight:900; text-align:left; white-space:nowrap; }
    .cv7991-title-table td { color:#0f172a; background:#fff; min-width:200px; }
    .cv7991-title-cell-empty { color:#94a3b8; font-style:italic; }
    .cv7991-title-cell-btn { border:0; background:transparent; padding:0; color:#0f172a; font:inherit; font-weight:700; text-align:left; cursor:pointer; }
    .cv7991-title-cell-btn:hover { color:#2563eb; text-decoration:underline; }
    .cv7991-title-input-row { display:grid; grid-template-columns:minmax(240px,1fr) auto; gap:10px; align-items:end; }
    .cv7991-title-input-row label { display:grid; gap:6px; font-weight:800; color:#0f172a; }
    .cv7991-title-input-row input { border:1px solid #cbd5e1; border-radius:12px; padding:10px 12px; font:inherit; background:#fff; }
    .cv7991-review-export-files { display:grid; gap:8px; padding:10px 12px; border:1px dashed #bfdbfe; border-radius:14px; background:#eff6ff; color:#0f172a; font-weight:800; }
    .cv7991-review-export-files div { line-height:1.45; }
    .cv7991-class-grid { display:grid; grid-template-columns:repeat(5,minmax(0,1fr)); gap:10px; }
    .cv7991-class-item { display:flex; align-items:center; gap:8px; min-width:0; border:1px solid #dbe4f0; border-radius:12px; background:#fff; padding:9px 10px; font-weight:800; color:#0f172a; cursor:pointer; }
    .cv7991-class-item:hover { background:#eff6ff; border-color:#93c5fd; }
    .cv7991-class-item.cv7991-class-disabled { opacity:.38; background:#f1f5f9; cursor:not-allowed; }
    .cv7991-class-item.cv7991-class-disabled:hover { background:#f1f5f9; border-color:#dbe4f0; }
    .cv7991-class-item.cv7991-class-disabled input { cursor:not-allowed; }
    .cv7991-class-item input { width:18px; height:18px; accent-color:#2563eb; flex:0 0 auto; }
    .cv7991-class-item span { overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
    .cv7991-class-empty { color:#64748b; border:1px dashed #cbd5e1; border-radius:12px; padding:10px 12px; font-weight:700; }
    .cv7991-bank-source { display:grid; grid-template-columns:repeat(2,minmax(260px,1fr)); gap:14px; align-items:stretch; }
    .cv7991-bank-choice-card { border:1px solid #dbe4f0; border-radius:16px; background:#f8fbff; padding:14px; display:grid; gap:12px; align-content:start; }
    .cv7991-bank-choice-card.active { border-color:#60a5fa; background:#eff6ff; box-shadow:0 8px 24px rgba(37,99,235,.12); }
    .cv7991-bank-source #cv7991BankSourceMvipCard { order:1; }
    .cv7991-bank-source #cv7991BankSourceWordCard { order:2; }
    .cv7991-matrix-exit-btn { display:none; }
    .cv7991-outline-matrix-mode .cv7991-matrix-exit-btn { display:inline-flex; }
    .cv7991-bank-choice-heading { display:flex; align-items:center; gap:10px; font-weight:900; color:#0f172a; cursor:pointer; }
    .cv7991-bank-choice-heading input[type="radio"] { width:18px; height:18px; padding:0; border:0; background:transparent; accent-color:#2563eb; flex:0 0 auto; }
    .cv7991-bank-choice-button { justify-content:center; width:fit-content; max-width:100%; border:1px solid #93c5fd; border-radius:12px; background:#fff; color:#1d4ed8; padding:10px 12px; box-shadow:0 1px 0 rgba(15,23,42,.04); }
    .cv7991-bank-choice-button:hover { background:#dbeafe; border-color:#60a5fa; }
    .cv7991-bank-choice-button[aria-disabled="true"] { opacity:.55; pointer-events:none; }
    .cv7991-bank-choice-actions { display:flex; gap:10px; flex-wrap:wrap; align-items:center; }
    .cv7991-bank-choice-card select { width:100%; min-width:0; }
    .cv7991-bank-choice-status { border:1px dashed #cbd5e1; border-radius:12px; padding:9px 10px; background:#fff; color:#475569; font-weight:700; line-height:1.4; }
    .cv7991-bank-choice-status.ok { color:#166534; background:#ecfdf5; border-color:#bbf7d0; }
    .cv7991-bank-choice-status.err { color:#991b1b; background:#fef2f2; border-color:#fecaca; }
    .cv7991-delete-grid { display:grid; grid-template-columns:minmax(260px,1fr) auto; gap:12px; align-items:end; }
    .cv7991-delete-grid label { display:grid; gap:6px; font-weight:800; color:#0f172a; }
    .cv7991-delete-grid select { border:1px solid #cbd5e1; border-radius:12px; padding:10px 12px; font:inherit; background:#fff; }
    .cv7991-score-open-row { display:flex; align-items:center; gap:12px; flex-wrap:wrap; }
    .cv7991-score-panel { border:1px solid #dbe4f0; border-radius:14px; overflow:hidden; background:#fff; }
    .cv7991-score-table { width:100%; border-collapse:collapse; font-size:14px; }
    .cv7991-score-table th, .cv7991-score-table td { border:1px solid #e2e8f0; padding:9px 10px; vertical-align:middle; }
    .cv7991-score-table th { background:#f1f5f9; color:#0f172a; text-align:center; font-weight:900; }
    .cv7991-score-table td.cv7991-score-center { text-align:center; }
    .cv7991-score-table input { width:86px; border:1px solid #cbd5e1; border-radius:10px; padding:7px 8px; font-weight:800; text-align:center; }
    .cv7991-score-total-line { margin-top:10px; padding:10px 12px; border-radius:12px; background:#eff6ff; color:#1d4ed8; font-weight:900; display:flex; gap:16px; flex-wrap:wrap; align-items:center; }
    .cv7991-config-head { display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; }
    .cv7991-config-options { display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end; }
    .cv7991-check { display:inline-flex; align-items:center; gap:8px; font-weight:800; color:#0f172a; }
    .cv7991-check input { width:18px; height:18px; accent-color:#2563eb; }
    .cv7991-action-modal[hidden] { display:none !important; }
    .cv7991-action-modal { position:fixed; inset:0; z-index:6600; display:flex; align-items:flex-start; justify-content:center; padding:10vh 14px 24px; }
    .cv7991-action-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.28); backdrop-filter:blur(2px); }
    .cv7991-action-dialog { position:relative; z-index:1; width:min(620px, calc(100vw - 28px)); max-height:calc(100vh - 80px); overflow:auto; background:#fff; border:1px solid #d7e3f1; border-radius:20px; box-shadow:0 24px 70px rgba(15,23,42,.24); }
    .cv7991-action-dialog-wide { width:min(980px, calc(100vw - 28px)); }
    #cv7991ExamTitleModal { align-items:stretch; justify-content:center; padding:24px; }
    #cv7991ExamTitleModal .cv7991-action-dialog-full { width:calc(100vw - 48px); max-width:none; height:calc(100vh - 48px); max-height:none; display:flex; flex-direction:column; }
    #cv7991ExamTitleModal .cv7991-action-body { flex:1; min-height:0; grid-template-rows:auto minmax(0,1fr); }
    #cv7991ExamTitleModal .cv7991-title-table-scroll { max-height:none; height:100%; min-height:0; }
    #cv7991ExamTitleModal .cv7991-title-input-row {
      order:-1; margin-bottom:2px; padding:10px 12px;
      border:1px solid #93c5fd; border-radius:12px; background:#f8fbff;
    }
    #cv7991PresetBankField, #cv7991QuestionBankSelect, #cv7991MvipBankStatus { display:none !important; }

    .cv7991-action-head { display:flex; align-items:flex-start; justify-content:space-between; gap:12px; padding:18px 20px 12px; border-bottom:1px solid #e2e8f0; background:linear-gradient(180deg,#eff6ff,#fff); }
    .cv7991-action-head h3 { margin:0; font-size:22px; color:#0f172a; }
    .cv7991-action-head p { margin:5px 0 0; color:#64748b; font-size:14px; line-height:1.45; }
    .cv7991-action-close { width:36px; height:36px; border:1px solid #cbd5e1; border-radius:999px; background:#fff; color:#0f172a; font-size:24px; line-height:1; cursor:pointer; }
    .cv7991-action-close:hover { background:#eff6ff; border-color:#93c5fd; }
    .cv7991-action-body { display:grid; gap:12px; padding:16px 20px; }
    .cv7991-action-option { align-items:flex-start; padding:12px 14px; border:1px solid #dbe4f0; border-radius:14px; background:#f8fbff; line-height:1.35; }
    .cv7991-action-option[hidden], .cv7991-check[hidden], .cv7991-freeze-essay-option[hidden] { display:none !important; }
    .cv7991-action-option input { margin-top:1px; flex:0 0 auto; }
    .cv7991-code-count-option { display:grid; gap:10px; }
    .cv7991-code-count-label { gap:10px; flex-wrap:wrap; }
    .cv7991-code-count-label .cv7991-code-count-inline-input {
      width:58px;
      height:36px;
      border:1px solid #cbd5e1;
      border-radius:8px;
      padding:6px 8px;
      font-weight:900;
      text-align:center;
      background:#fff;
      color:#0f172a;
    }
    .cv7991-code-count-label .cv7991-code-count-inline-input:disabled { background:#f1f5f9; color:#94a3b8; }
    .cv7991-code-count-row { display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding-left:28px; }
    .cv7991-code-count-row[hidden] { display:none !important; }
    .cv7991-code-count-row label { display:flex; align-items:center; gap:8px; font-weight:800; color:#0f172a; }
    .cv7991-code-count-row input[type="number"] { width:58px; height:36px; border:1px solid #cbd5e1; border-radius:8px; padding:6px 8px; font-weight:900; text-align:center; }
    .cv7991-action-note { padding:10px 12px; border-radius:12px; background:#f8fafc; border:1px dashed #cbd5e1; color:#475569; font-size:13px; font-weight:700; line-height:1.45; }
    .cv7991-action-actions { display:flex; justify-content:flex-end; gap:10px; flex-wrap:wrap; padding:0 20px 20px; }
    .cv7991-bank-grid label { display:grid; gap:6px; font-weight:800; color:#0f172a; }
    .cv7991-bank-grid select, .cv7991-bank-grid input[type="number"] { border:1px solid #cbd5e1; border-radius:12px; padding:10px 12px; font:inherit; background:#fff; }
    .cv7991-bank-grid .cv7991-check { display:flex; align-items:center; gap:8px; padding-bottom:11px; white-space:nowrap; }
    .cv7991-bank-grid .cv7991-check input { width:18px; height:18px; accent-color:#2563eb; }
    .cv7991-bank-status { border:1px solid #dbe4f0; border-radius:12px; padding:10px 12px; color:#475569; background:#f8fafc; font-weight:700; }
    .cv7991-bank-status.ok { color:#166534; background:#ecfdf5; border-color:#bbf7d0; }
    .cv7991-bank-status.err { color:#991b1b; background:#fef2f2; border-color:#fecaca; }
    .cv7991-matrix-input:disabled {
      background:#f6f8fb;
      color:#c5ced8 !important;
      -webkit-text-fill-color:#c5ced8;
      cursor:not-allowed;
      border-color:#e2e8f0;
      box-shadow:none;
      opacity:1;
      font-weight:700;
    }
    .cv7991-cell-disabled {
      background:#f8fafc !important;
      color:#c5ced8 !important;
    }
    .cv7991-cell-disabled .cv7991-matrix-input,
    .cv7991-cell-disabled .regular-question-input {
      background:#f6f8fb !important;
      color:#c5ced8 !important;
      -webkit-text-fill-color:#c5ced8;
      border-color:#e2e8f0 !important;
      box-shadow:none;
      opacity:1;
      font-weight:700;
    }
    .cv7991-step-launchers { display:grid; grid-template-columns:repeat(2,minmax(240px,1fr)); gap:14px; }
    .cv7991-step-launch { border:1px solid #dbe4f0; border-radius:16px; background:#fff; padding:16px; display:grid; gap:10px; align-content:start; }
    .cv7991-step-launch h4 { margin:0; font-size:16px; color:#16a34a; }
    .cv7991-step-launch p { margin:0; color:#64748b; font-size:13px; line-height:1.45; }

    .cv7991-step-launchers-matrix-only { grid-template-columns:minmax(220px, 360px); }
    .cv7991-step-launchers-matrix-only .cv7991-step-launch { padding:0; border:0; background:transparent; }
    .cv7991-step-launchers-matrix-only .nav-btn { min-width:220px; }
    .cv7991-editor-modal[hidden] { display:none !important; }
    .cv7991-editor-modal { position:fixed; inset:0; z-index:6500; background:#f8fbff; display:flex; flex-direction:column; }
    .cv7991-editor-head { flex:0 0 auto; display:flex; align-items:flex-start; justify-content:space-between; gap:14px; padding:14px 18px; border-bottom:1px solid #dbe4f0; background:#fff; box-shadow:0 8px 24px rgba(15,23,42,.08); }
    .cv7991-editor-head h3 { margin:0; font-size:22px; color:#16a34a; }
    .cv7991-editor-head p { margin:4px 0 0; color:#64748b; font-size:14px; }
    .cv7991-editor-actions { display:flex; gap:10px; align-items:center; flex-wrap:wrap; justify-content:flex-end; }
    .cv7991-editor-body { flex:1 1 auto; min-height:0; padding:14px 18px 18px; overflow:hidden; display:flex; flex-direction:column; gap:12px; }
    .cv7991-editor-body .cv7991-table-scroll { flex:1 1 auto; max-height:none; min-height:0; border-radius:14px; }
    .cv7991-editor-note { color:#475569; font-size:13px; font-weight:700; }

    .cv7991-matrix-editor-head { align-items:center; gap:10px; justify-content:space-between; }
    #cv7991MatrixModal .cv7991-editor-actions { margin-left:auto; }
    .cv7991-matrix-editor-title { display:none; }

    .cv7991-matrix-title-line {
      flex:1 1 auto; min-width:0; display:flex; align-items:center; gap:10px;
      border:1px solid #c7dcff; border-radius:12px; padding:7px 10px; background:#f8fbff;
    }
    .cv7991-matrix-title-label { flex:0 0 auto; font-weight:900; color:#0f172a; }
    .cv7991-matrix-title-value {
      flex:0 1 150px; min-width:80px; max-width:180px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
      color:#64748b; font-weight:900;
    }
    .cv7991-matrix-title-value.has-value { color:#1d4ed8; }

    .cv7991-matrix-live-summary {
      flex:1 1 auto; min-width:0; display:grid;
      grid-template-columns:repeat(4, minmax(115px, 1fr)) minmax(125px, .95fr);
      gap:6px; align-items:stretch;
    }
    .cv7991-matrix-live-item {
      min-width:0; padding:7px 9px; border:1px solid #bfdbfe; border-radius:9px;
      background:#eff6ff; display:flex; flex-direction:row; align-items:center; justify-content:center;
      gap:5px; line-height:1; text-align:center; white-space:nowrap;
    }
    .cv7991-matrix-live-item > span {
      color:#334155; font-size:12px; font-weight:900;
    }
    .cv7991-matrix-live-item > b {
      margin:0; color:#0f172a; font-size:15px; font-weight:1000;
      display:inline-flex; align-items:center; gap:3px;
    }
    .cv7991-matrix-live-item em {
      font-style:normal; color:#1d4ed8; font-size:16px; font-weight:1000;
    }
    .cv7991-matrix-live-total {
      background:#fff7ed; border-color:#fdba74;
    }
    .cv7991-matrix-live-total > span { color:#9a3412; }
    .cv7991-matrix-live-total > b {
      color:#dc2626; font-size:20px; letter-spacing:.2px;
    }

    /* Ô nào đã chọn số câu > 0 thì đổi nền vàng để giáo viên dễ kiểm soát. */
    #cv7991MatrixTable td.cv7991-selected-cell {
      background:#fff4a8 !important;
    }
    #cv7991MatrixTable .cv7991-matrix-input.cv7991-selected-count {
      background:#ffe66a !important;
      border-color:#eab308 !important;
      box-shadow:0 0 0 1px rgba(234,179,8,.16) inset;
      color:#7c2d12 !important;
      font-weight:1000 !important;
    }
    .cv7991-editor-modal.cv7991-outline-matrix-mode .cv7991-matrix-title-line { display:none !important; }

    .cv7991-score-config-panel {
      margin-top:10px; display:grid;
      grid-template-columns: minmax(130px,.75fr) minmax(260px,1.15fr) minmax(420px,2.2fr) minmax(230px,1.2fr) minmax(200px,1fr) minmax(170px,.8fr);
      align-items:stretch; border:1px solid #c7dcff; border-radius:14px; overflow:hidden; background:#fff;
      color:#0f172a; font-size:13px;
    }
    .cv7991-score-config-title {
      display:flex; align-items:center; justify-content:center; padding:10px 12px;
      background:#dbeafe; color:#0f172a; font-weight:900; text-align:center;
    }
    .cv7991-score-config-item {
      min-width:0; display:flex; flex-direction:column; align-items:center; justify-content:center;
      gap:5px; padding:9px 10px; border-left:1px solid #dbe4f0; background:#fff;
      font-weight:800; text-align:center;
    }
    .cv7991-score-config-label { font-weight:900; color:#0f172a; }
    .cv7991-score-config-item select {
      min-width:132px; border:1px solid #93c5fd; border-radius:9px; padding:6px 8px;
      background:#fff; color:#0f172a; font-weight:900; text-align:center;
    }
    .cv7991-score-config-item-tf select {
      width:100%; max-width:390px; min-width:230px; font-size:11.5px; text-align:left;
    }
    .cv7991-score-config-fixed { color:#334155; line-height:1.35; }
    .cv7991-score-config-sub { color:#64748b; font-size:12px; font-weight:700; }
    .cv7991-score-config-total {
      display:flex; flex-direction:column; align-items:center; justify-content:center;
      gap:4px; padding:9px 10px; border-left:1px solid #dbe4f0;
      background:#eff6ff; color:#1d4ed8; font-weight:900; text-align:center;
    }
    .cv7991-score-config-total b { font-size:27px; }
    /* Toàn bộ khu Cài đặt điểm số tăng cỡ chữ 1,5 lần so với bản trước. */
    .cv7991-score-config-panel { font-size:19.5px; }
    .cv7991-score-config-title,
    .cv7991-score-config-label,
    .cv7991-score-config-fixed,
    .cv7991-score-config-total { font-size:19.5px; }
    .cv7991-score-config-item select {
      font-size:19.5px;
      min-height:38px;
      padding:8px 10px;
    }
    .cv7991-score-config-item-tf select { font-size:17.25px; }
    .cv7991-score-config-sub { font-size:18px; }

    @media (max-width: 1300px) {
      .cv7991-score-config-panel { grid-template-columns:1fr 1fr; }
      .cv7991-score-config-title, .cv7991-score-config-total { grid-column:1 / -1; }
      .cv7991-score-config-item { border-top:1px solid #dbe4f0; }
      .cv7991-matrix-editor-head { align-items:stretch; }
      .cv7991-matrix-title-line { min-height:42px; flex-wrap:wrap; }
      .cv7991-matrix-title-value { flex:1 1 160px; max-width:none; }
      .cv7991-matrix-live-summary {
        order:3; flex-basis:100%;
        grid-template-columns:repeat(5, minmax(120px, 1fr));
      }
    }
    @media (max-width: 900px) {
      .cv7991-matrix-live-summary { grid-template-columns:repeat(2, minmax(135px, 1fr)); }
      .cv7991-matrix-live-total { grid-column:1 / -1; }
    }
    .cv7991-matrix-scorebar {
      flex:1 1 auto; display:grid; grid-template-columns: 150px minmax(220px, 1fr) minmax(440px, 2fr) minmax(220px, 1fr) minmax(150px, .8fr) minmax(150px, .8fr);
      align-items:center; gap:0; border:1px solid #c7dcff; border-radius:14px; overflow:hidden; background:#fff;
      font-size:13px; font-weight:800; color:#0f172a;
    }
    .cv7991-matrix-score-title { height:100%; min-height:48px; display:flex; align-items:center; justify-content:center; text-align:center; padding:8px 10px; background:#dbeafe; color:#0f172a; font-weight:900; }
    .cv7991-matrix-scorebar label, .cv7991-matrix-score-total { min-height:48px; display:flex; align-items:center; justify-content:center; gap:8px; padding:8px 10px; border-left:1px solid #dbe4f0; background:#fff; flex-wrap:wrap; }
    .cv7991-matrix-scorebar input { width:64px; border:1px solid #cbd5e1; border-radius:9px; padding:6px 7px; font-weight:900; text-align:center; }
    .cv7991-fixed-score { display:inline-flex; align-items:center; justify-content:center; min-width:46px; height:31px; border:1px solid #cbd5e1; border-radius:9px; background:#fff; font-weight:900; }
    .cv7991-matrix-score-total { color:#1d4ed8; background:#eff6ff; font-weight:900; }
    .cv7991-matrix-req-cell { min-width:420px; line-height:1.45; }
    .cv7991-matrix-empty-cell { background:#fbfdff; color:#cbd5e1; }
    #cv7991MatrixTable tbody td:not(.cv7991-sticky-tt):not(.cv7991-sticky-chapter):not(.cv7991-sticky-unit):not(.cv7991-sticky-req) {
      position:static !important; left:auto !important; width:auto !important; min-width:38px; max-width:42px !important; box-shadow:none !important;
    }
    #cv7991MatrixTable tbody td.cv7991-sticky-tt {
      position:sticky !important; left:0 !important; width:var(--cv7991-sticky-tt); min-width:var(--cv7991-sticky-tt); max-width:var(--cv7991-sticky-tt); z-index:6; background:#fff;
    }
    #cv7991MatrixTable tbody td.cv7991-sticky-chapter {
      position:sticky !important; left:var(--cv7991-sticky-tt) !important; width:var(--cv7991-sticky-chapter); min-width:var(--cv7991-sticky-chapter); max-width:var(--cv7991-sticky-chapter); z-index:6; background:#fff; font-weight:800; color:#1e3a8a;
    }
    #cv7991MatrixTable tbody td.cv7991-sticky-unit {
      position:sticky !important; left:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter)) !important; width:var(--cv7991-sticky-unit); min-width:var(--cv7991-sticky-unit); max-width:var(--cv7991-sticky-unit); z-index:6; background:#fff;
    }
    #cv7991MatrixTable tbody td.cv7991-sticky-req {
      position:sticky !important; left:calc(var(--cv7991-sticky-tt) + var(--cv7991-sticky-chapter) + var(--cv7991-sticky-unit)) !important; width:var(--cv7991-sticky-req); min-width:var(--cv7991-sticky-req); max-width:var(--cv7991-sticky-req); z-index:6; background:#fff; box-shadow:8px 0 10px -10px rgba(15,23,42,.45);
    }

    #cv7991MatrixTable { min-width:1100px !important; }
    #cv7991MatrixTable thead tr:nth-child(2) th {
      top:35px;
      width:auto !important;
      min-width:0 !important;
      max-width:none !important;
      padding-left:5px !important;
      padding-right:5px !important;
      background:#ffffff;
    }
    #cv7991MatrixTable .cv7991-matrix-input {
      width:54px !important;
      min-width:54px !important;
      max-width:54px !important;
      padding:5px 7px !important;
      box-sizing:border-box;
      text-align:center;
    }
    #cv7991MatrixTable tbody td:not(.cv7991-sticky-tt):not(.cv7991-sticky-chapter):not(.cv7991-sticky-unit):not(.cv7991-sticky-req) {
      width:auto !important;
      min-width:0 !important;
      max-width:none !important;
      padding-left:5px !important;
      padding-right:5px !important;
    }
    #cv7991MatrixTable thead tr:first-child th:last-child,
    #cv7991MatrixTable tbody td.cv7991-row-rate-cell,
    #cv7991MatrixTable tfoot tr th:last-child {
      width:auto !important;
      min-width:0 !important;
      max-width:none !important;
    }
    #cv7991MatrixTable {
      --cv7991-type-line: #0ea5e9;
      --cv7991-lesson-line: #39ff14;
    }

    /* MVIP 13/10/2026: thêm Tổng Biết/Hiểu/VD/VDC, giữ viền nhóm rõ ràng. */
    #cv7991MatrixTable tbody td.cv7991-row-total-cell { background:#f0f9ff; color:#075985; font-weight:900; text-align:center; vertical-align:middle; }
    #cv7991MatrixTable tfoot tr > th { white-space:nowrap; font-variant-numeric:tabular-nums; }
    #cv7991MatrixModal.cv7991-outline-matrix-mode #cv7991MatrixTable tfoot tr:nth-child(2),
    #cv7991MatrixModal.cv7991-outline-matrix-mode #cv7991MatrixTable tfoot tr:nth-child(3) { display:none !important; }
    #cv7991MatrixModal.cv7991-outline-matrix-mode #cv7991MatrixTable tfoot tr:first-child th { bottom:0 !important; }
    #cv7991MatrixTable tfoot tr:nth-child(3) th { min-height:22px; }
    #cv7991MatrixTable .cv7991-type-start {
      border-left:3px solid var(--cv7991-type-line) !important;
    }
    #cv7991MatrixTable thead tr:first-child th:nth-child(3),
    #cv7991MatrixTable tbody td.cv7991-sticky-unit,
    #cv7991MatrixTable tfoot .cv7991-footer-label {
      border-right:3px solid var(--cv7991-type-line) !important;
    }
    #cv7991MatrixTable thead tr:first-child th:nth-child(4),
    #cv7991MatrixTable thead tr:first-child th:nth-child(5),
    #cv7991MatrixTable thead tr:nth-child(2) th:first-child,
    #cv7991TotalMc, #cv7991PointMc, #cv7991PercentMc,
    #cv7991TotalTf, #cv7991PointTf, #cv7991PercentTf,
    #cv7991TotalShort, #cv7991PointShort, #cv7991PercentShort,
    #cv7991TotalEssay, #cv7991PointEssay, #cv7991PercentEssay,
    #cv7991TotalB, #cv7991PointB, #cv7991PercentB {
      border-left:3px solid var(--cv7991-type-line) !important;
    }
    #cv7991MatrixTable tbody tr.cv7991-lesson-start > td {
      border-top:3px solid var(--cv7991-lesson-line) !important;
    }
    #cv7991MatrixTable tbody tr.cv7991-lesson-start > td.cv7991-sticky-tt,
    #cv7991MatrixTable tbody tr.cv7991-lesson-start > td.cv7991-sticky-chapter,
    #cv7991MatrixTable tbody tr.cv7991-lesson-start > td.cv7991-sticky-unit,
    #cv7991MatrixTable tbody tr.cv7991-lesson-start > td.cv7991-sticky-req {
      border-top:3px solid var(--cv7991-lesson-line) !important;
    }

    @media (max-width: 1300px) { .cv7991-matrix-scorebar { grid-template-columns: 1fr 1fr; } .cv7991-matrix-score-title { grid-column:1 / -1; } }
    @media (max-width: 1100px) { .cv7991-class-grid { grid-template-columns:repeat(3,minmax(0,1fr)); } }
    @media (max-width: 700px) {
      #cv7991ExamTitleModal { padding:10px; }
      #cv7991ExamTitleModal .cv7991-action-dialog-full { width:calc(100vw - 20px); height:calc(100vh - 20px); }
    }
    @media (max-width: 920px) { .cv7991-step-launchers, .cv7991-form-grid, .cv7991-title-picker-row, .cv7991-title-input-row, .cv7991-bank-source, .cv7991-delete-grid { grid-template-columns:1fr; } .cv7991-class-grid { grid-template-columns:repeat(2,minmax(0,1fr)); } }
    @media (max-width: 560px) { .cv7991-class-grid { grid-template-columns:1fr; } }
    @media (max-width: 920px) { .cv7991-bank-grid { grid-template-columns:1fr; } .cv7991-bank-grid .cv7991-check { padding-bottom:0; } }
    .finish-auto-btn { min-width: 56px; display:inline-flex; align-items:center; justify-content:center; font-weight: 800; color:#1d4ed8; border-color:#93c5fd; background:#eff6ff; }
    .finish-auto-btn .finish-auto-icon { width:20px; height:20px; display:block; flex:0 0 auto; }
    .finish-auto-btn:hover:not(:disabled) { background:#dbeafe; border-color:#60a5fa; }
    .exam-rescan-btn[hidden] { display:none !important; }
    .exam-rescan-btn { min-width: 110px; font-weight: 800; color:#9a3412; border-color:#fdba74; background:#fff7ed; }
    .exam-rescan-btn:hover:not(:disabled) { background:#ffedd5; border-color:#fb923c; }
    .exam-config-panel { max-width:100%; }
    .exam-config-panel > .class-manager-list, .exam-config-panel > .exam-config-box { width:100%; }
    .exam-config-box { border:1px solid #dbe4f0; border-radius:14px; padding:12px; background:#f8fbff; }
    .exam-config-auto-hidden { display:none !important; }
    .exam-config-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:10px; }
    .exam-config-name-field { grid-column:1 / -1; }
    .exam-config-box textarea { width:100%; min-height:160px; border:1px solid #cbd5e1; border-radius:10px; background:#fff; font:inherit; padding:10px 12px; resize:vertical; line-height:1.45; }
    .exam-assign-preview { margin-top: 10px; border:1px dashed #bfdbfe; border-radius:12px; background:#fff; padding:10px 12px; color:#334155; font-size:13px; line-height:1.5; white-space:pre-line; }
    @media (max-width: 760px) {
      .class-manager-dialog { width:calc(100vw - 6px); height:calc(100vh - 6px); margin:3px auto; max-height:calc(100vh - 6px); border-radius:14px; }
      .class-manager-subnav { gap:8px; }
      .class-manager-subbtn { width:100%; text-align:center; }
      .class-manager-grid { grid-template-columns: 1fr; }
      .class-manager-main textarea { min-height:260px; }
      .exam-config-grid { grid-template-columns: 1fr; }
    }

    .result-modal[hidden] { display:none !important; }
    .result-modal { position:fixed; inset:0; z-index:5000; }
    .result-modal-backdrop { position:absolute; inset:0; background: rgba(15, 23, 42, 0.18); }
    .result-dialog {
      position:absolute; left:50%; top:61%; transform:translate(-50%, -50%);
      width:min(420px, calc(100% - 24px)); min-height:150px;
      background:#fff; border:2px solid #22c55e; border-radius:18px;
      box-shadow:0 24px 56px rgba(15,23,42,.22); padding:14px 16px 16px;
    }
    .result-dialog-title { font-size:28px; font-weight:800; margin-bottom:14px; }
    .result-dialog-row { display:flex; align-items:center; gap:10px; font-size:34px; font-weight:800; margin-bottom:14px; }
    .result-correct-badge { display:inline-flex; align-items:center; justify-content:center; min-width:68px; height:52px; padding:0 18px; border-radius:12px; background:#9bd0ff; color:#16a34a; font-weight:900; }
    .result-rate-line { font-size:30px; font-weight:800; margin-bottom:18px; }
    .result-dialog-actions { display:flex; gap:12px; flex-wrap:wrap; }
    .result-guide-btn {
      border:2px solid #0f766e; background:#fff; color:#0f766e; font-weight:900;
    }
    .result-guide-btn:hover:not(:disabled) { background:#f0fdfa; border-color:#115e59; color:#115e59; }
    .result-guide-btn:disabled { opacity:.5; cursor:not-allowed; }
    .result-guide-btn[hidden] { display:none !important; }

    body.desktop-fixed-right { --panel-w: min(34vw, 430px); }
    body.exam-mode-expanded .topbar { display:none !important; }
    body.desktop-fixed-right .container {
      width: calc(100% - var(--panel-w) - 16px);
      margin-left: 8px;
      margin-right: 0;
    }
    body.desktop-fixed-right .topbar { z-index: 900; }
    body.desktop-fixed-right .topbar-inner { min-height: 62px; }
    body.desktop-fixed-right .hero { padding-top: 18px; }
    body.desktop-fixed-right .nav-btn { padding:10px 14px; }
    body.desktop-fixed-right .dashboard-shell { position:relative; }
    body.desktop-fixed-right .toolbar,
    body.desktop-fixed-right .stats-grid { display:none !important; }
    body.desktop-fixed-right .workspace { display:block; }
    body.desktop-fixed-right .history-board { margin-top: 0; }
    body.desktop-fixed-right .current-board {
      position:fixed; top:0; right:0; width:var(--panel-w); height:100vh; z-index:1500;
      border-radius:0 0 0 18px; box-shadow: -12px 0 30px rgba(15,23,42,.10);
      border-top:none; border-right:none; border-bottom:none; border-left:1px solid #dbe4f0;
      padding:6px 8px 8px; display:flex; flex-direction:column; background:#fff; overflow:hidden;
    }
    body.desktop-fixed-right .board-head { display:none; }
    body.desktop-fixed-right .compact-toolbar { display:none !important; }
    body.desktop-fixed-right .compact-toolbar-row { grid-template-columns: minmax(0,1fr); margin-top:0; }
    body.desktop-fixed-right .scan-controls {
      position:sticky; top:0; z-index:19; background:#fff; padding:4px 0 6px; margin:0;
      border-bottom:1px solid #e5edf6; display:flex; align-items:center; justify-content:flex-start;
      gap:3px; flex-wrap:nowrap;
    }
    body.desktop-fixed-right .scan-controls-left { width:100%; min-width:0; gap:3px; flex-wrap:nowrap; align-items:center; justify-content:flex-start; }
    body.desktop-fixed-right .answer-btn { width:28px; min-width:28px; height:28px; border-radius:7px; font-size:13px; padding:0; }
    body.desktop-fixed-right #hideRevealBtn { min-width:72px; height:30px; padding:4px 8px; border-radius:8px; }
    body.desktop-fixed-right .compact-class-wrap-inline { min-width: 108px; flex: 1 1 108px; max-width: 120px; }
    body.desktop-fixed-right .compact-class-wrap-inline select { height:28px; padding:4px 22px 4px 7px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .mini-control { gap:2px; font-size:11px; flex:0 0 auto; white-space:nowrap; }
    body.desktop-fixed-right .class-manage-btn { height:28px; padding:0 7px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .mini-control select { min-width:40px; width:40px; height:28px; padding:4px 16px 4px 5px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .menu-btn { height:28px; padding:0 8px; border-radius:8px; font-size:12px; }
    body.desktop-fixed-right .finish-auto-btn { min-width:40px; padding:0 8px; }
    body.desktop-fixed-right .exam-rescan-btn { min-width:86px; padding:0 8px; }
    body.desktop-fixed-right .scan-mode-row {
      position:sticky; top:39px; z-index:18; background:#fff; padding:4px 0 6px; margin:0 0 6px;
      border-bottom:1px solid #eef2f7; gap:6px; align-items:center;
    }
    body.desktop-fixed-right .exam-mode-toggle { gap:5px; font-size:11px; }
    body.desktop-fixed-right .exam-mode-toggle input { width:14px; height:14px; }
    body.desktop-fixed-right .exam-mode-enter-btn {
      min-height:28px; height:28px; padding:0 9px; border-radius:8px; font-size:11px;
    }
    body.desktop-fixed-right .exam-mode-extra { gap:5px; }
    body.desktop-fixed-right .exam-mode-top { gap:5px; flex-wrap:nowrap; }
    body.desktop-fixed-right .exam-select-control { min-width:68px; width:68px; height:28px; padding:4px 7px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .exam-inline-control { gap:4px; font-size:11px; }
    body.desktop-fixed-right .exam-inline-control select { min-width:50px; height:28px; padding:4px 7px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .exam-inline-control.columns select { min-width:58px; }
    body.desktop-fixed-right .exam-question-chip { min-height:28px; padding:0 8px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .exam-done-btn { min-height:28px; padding:0 8px; border-radius:8px; font-size:11px; }
    body.desktop-fixed-right .student-board { flex:1 1 auto; min-height:0; padding:4px; border:none; border-radius:0; box-shadow:none; overflow:auto; --student-font-size: 20px; }
    body.desktop-fixed-right .student-columns { min-width:0; gap:4px; grid-template-columns: repeat(3, minmax(0,1fr)) !important; }
    body.desktop-fixed-right .student-column { border-radius:0; border:1px solid #9ca3af; overflow:hidden; }
    body.desktop-fixed-right .student-line { min-height: calc(var(--student-font-size) * 1.32); padding: clamp(3px, calc(var(--student-font-size) * 0.16), 6px) clamp(6px, calc(var(--student-font-size) * 0.3), 10px); gap:6px; }
    body.desktop-fixed-right .student-answer { min-width:20px; font-size:17px; }
    body.desktop-fixed-right #studentEmpty { margin-top:8px; border-radius:10px; }

    body.desktop-fixed-right.exam-mode-expanded { --panel-w: calc(100vw - 8px); }
    body.desktop-fixed-right.exam-mode-expanded .container {
      width:0 !important;
      margin:0 !important;
      padding:0 !important;
      overflow:visible !important;
    }
    body.desktop-fixed-right.exam-mode-expanded .current-board {
      left:0;
      right:0;
      width:100vw;
      border-radius:0;
      box-shadow:none;
      border-left:none;
      padding:12px 16px 16px;
    }
    body.desktop-fixed-right.exam-mode-expanded .scan-controls {
      display:none !important;
    }
    body.desktop-fixed-right.exam-mode-expanded .board-head {
      display:flex; align-items:flex-start; justify-content:space-between; gap:18px;
      flex-wrap:nowrap; margin-bottom:12px;
    }
    body.desktop-fixed-right.exam-mode-expanded .board-head > div { min-width:0; }
    body.desktop-fixed-right.exam-mode-expanded .exam-mode-exit-btn {
      display:inline-flex; align-items:center; justify-content:center; flex:0 0 auto;
    }
    body.desktop-fixed-right.exam-mode-expanded .scan-controls {
      padding:12px 0 10px;
      gap:10px;
      flex-wrap:wrap;
    }
    body.desktop-fixed-right.exam-mode-expanded .scan-controls-left {
      width:100%;
      gap:10px;
      flex-wrap:wrap;
      align-items:center;
      justify-content:flex-start;
    }
    body.desktop-fixed-right.exam-mode-expanded .answer-btn {
      width:auto;
      min-width:40px;
      height:36px;
      border-radius:10px;
      font-size:14px;
      padding:0 12px;
    }
    body.desktop-fixed-right.exam-mode-expanded #hideRevealBtn {
      min-width:86px;
      height:36px;
      padding:0 12px;
      border-radius:10px;
    }
    body.desktop-fixed-right.exam-mode-expanded .compact-class-wrap-inline {
      min-width:280px;
      flex:0 1 340px;
      max-width:340px;
    }
    body.desktop-fixed-right.exam-mode-expanded .compact-class-wrap-inline select {
      height:36px;
      padding:8px 12px;
      border-radius:10px;
      font-size:14px;
    }
    body.desktop-fixed-right.exam-mode-expanded .mini-control {
      gap:6px;
      font-size:14px;
    }
    body.desktop-fixed-right.exam-mode-expanded .mini-control select {
      min-width:68px;
      width:auto;
      height:36px;
      padding:8px 10px;
      border-radius:10px;
      font-size:14px;
    }
    body.desktop-fixed-right.exam-mode-expanded .menu-btn {
      height:36px;
      padding:0 12px;
      border-radius:10px;
      font-size:14px;
    }
    body.desktop-fixed-right.exam-mode-expanded .finish-auto-btn { min-width:56px; }
    body.desktop-fixed-right.exam-mode-expanded .exam-rescan-btn { min-width:110px; }
    body.desktop-fixed-right.exam-mode-expanded .scan-mode-row {
      top:0;
      padding:4px 0 12px;
      margin:0 0 12px;
      gap:10px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-mode-toggle {
      gap:8px;
      font-size:13px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-mode-toggle input {
      width:16px;
      height:16px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-mode-extra { gap:8px; }
    body.desktop-fixed-right.exam-mode-expanded .exam-mode-top {
      gap:8px;
      flex-wrap:wrap;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-inline-control {
      gap:6px;
      font-size:12px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-inline-control select {
      min-width:64px;
      height:34px;
      padding:6px 10px;
      border-radius:10px;
      font-size:12px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-inline-control.columns select { min-width:74px; }
    body.desktop-fixed-right.exam-mode-expanded .exam-select-control {
      min-width:90px;
      width:auto;
      height:34px;
      padding:6px 10px;
      border-radius:10px;
      font-size:14px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-question-chip {
      min-height:34px;
      padding:0 10px;
      border-radius:10px;
      font-size:12px;
    }
    body.desktop-fixed-right.exam-mode-expanded .exam-done-btn {
      min-height:34px;
      padding:0 12px;
      border-radius:10px;
      font-size:12px;
    }
    body.desktop-fixed-right.exam-mode-expanded .summary-row {
      grid-template-columns: repeat(5, minmax(0,1fr));
      gap:10px;
      margin-bottom:16px;
    }
    body.desktop-fixed-right.exam-mode-expanded .student-board {
      padding:10px;
      border:none;
      border-radius:0;
      box-shadow:none;
      --student-font-size: 20px;
    }
    body.desktop-fixed-right.exam-mode-expanded .student-columns {
      gap:6px;
      grid-template-columns: repeat(var(--student-grid-columns, 5), minmax(0,1fr)) !important;
    }
    body.desktop-fixed-right.exam-mode-expanded .student-column {
      border-radius:10px;
      border:1px solid #9ca3af;
    }
    body.desktop-fixed-right.exam-mode-expanded .student-line {
      min-height: calc(var(--student-font-size) * 1.3);
      padding:6px 8px;
      gap:6px;
    }
    body.desktop-fixed-right.exam-mode-expanded .student-answer {
      min-width:22px;
      font-size:18px;
    }

    @media (max-width: 1099px) {
      body.desktop-fixed-right .container { width: min(1240px, calc(100% - 28px)); margin: 0 auto; }
    }
    @media (max-width: 760px) {
      .result-dialog { width:min(96vw, 420px); top:63%; padding:12px; }
      .result-dialog-title { font-size:24px; }
      .result-dialog-row { font-size:28px; }
      .result-rate-line { font-size:24px; }
    }

    .report-modal[hidden] { display:none !important; }
    .report-modal {
      position: fixed;
      inset: 0;
      z-index: 30000 !important;
      display: flex;
      align-items: stretch;
      justify-content: stretch;
      padding: 0;
      isolation: isolate;
    }
    .report-modal:not([hidden]) { display:flex !important; }
    body.report-open .topbar { z-index: 900 !important; }
    .report-modal-backdrop {
      position: absolute;
      inset: 0;
      background: rgba(15, 23, 42, 0.35);
      backdrop-filter: blur(2px);
    }
    .action-confirm-modal[hidden] { display:none !important; }
    .action-confirm-modal {
      position:fixed;
      inset:0;
      z-index:5300;
    }
    .action-confirm-backdrop {
      position:absolute;
      inset:0;
      background: rgba(15, 23, 42, 0.24);
    }
    .action-confirm-dialog {
      position:relative;
      max-width:460px;
      margin:14vh auto 0;
      background:#ffffff;
      border:1px solid #d7e3f1;
      border-radius:20px;
      box-shadow:0 24px 70px rgba(15,23,42,.22);
      overflow:hidden;
    }
    .action-confirm-head {
      padding:18px 22px 8px;
      font-size:28px;
      font-weight:800;
      color:#0f172a;
    }
    .action-confirm-body {
      padding:0 22px 18px;
      color:#475569;
      font-size:18px;
      line-height:1.55;
    }
    .action-confirm-actions {
      display:flex;
      justify-content:flex-end;
      gap:12px;
      padding:0 22px 22px;
    }
    .alert-modal[hidden] { display:none !important; }
    .alert-modal {
      position:fixed;
      inset:0;
      z-index:7000;
    }
    .alert-backdrop {
      position:absolute;
      inset:0;
      background: rgba(15, 23, 42, 0.24);
    }
    .alert-dialog {
      position:relative;
      max-width:520px;
      margin:14vh auto 0;
      background:#ffffff;
      border:1px solid #d7e3f1;
      border-radius:20px;
      box-shadow:0 24px 70px rgba(15,23,42,.22);
      overflow:hidden;
    }
    .alert-head {
      padding:18px 22px 8px;
      font-size:28px;
      font-weight:800;
      color:#0f172a;
    }
    .alert-body {
      padding:0 22px 18px;
      color:#475569;
      font-size:18px;
      line-height:1.55;
      white-space:pre-line;
    }
    .alert-actions {
      display:flex;
      justify-content:flex-end;
      gap:12px;
      padding:0 22px 22px;
    }
    /* Riêng cảnh báo định dạng Word/PowerPoint cũ cần nổi bật gấp đôi để
       người dùng nhìn rõ hướng dẫn chuyển sang .docx/.pptx. */
    .alert-modal.is-legacy-file-warning .alert-dialog {
      max-width:min(1040px,calc(100vw - 32px));
      margin-top:7vh;
      border-radius:32px;
    }
    .alert-modal.is-legacy-file-warning .alert-head {
      padding:36px 44px 16px;
      font-size:56px;
    }
    .alert-modal.is-legacy-file-warning .alert-body {
      padding:0 44px 36px;
      font-size:36px;
      line-height:1.55;
    }
    .alert-modal.is-legacy-file-warning .alert-actions {
      gap:24px;
      padding:0 44px 44px;
    }
    .alert-modal.is-legacy-file-warning .alert-actions .nav-btn {
      min-height:72px;
      padding:0 32px;
      border-radius:18px;
      font-size:28px;
    }
    @media (max-width:760px),(max-height:620px) {
      .alert-modal.is-legacy-file-warning .alert-dialog { margin-top:3vh; }
      .alert-modal.is-legacy-file-warning .alert-head { padding:24px 28px 12px; font-size:40px; }
      .alert-modal.is-legacy-file-warning .alert-body { padding:0 28px 24px; font-size:28px; }
      .alert-modal.is-legacy-file-warning .alert-actions { padding:0 28px 28px; }
      .alert-modal.is-legacy-file-warning .alert-actions .nav-btn { min-height:58px; font-size:22px; }
    }
    /* Bảng chọn Lớp-Môn khi vào Kết quả mà chưa chọn lớp. */
    .result-class-required-modal[hidden] { display:none !important; }
    .result-class-required-modal {
      position:fixed; inset:0; z-index:2147483300; display:grid; place-items:center;
      padding:24px; font-family:Arial, Helvetica, sans-serif;
    }
    .result-class-required-backdrop {
      position:absolute; inset:0; background:rgba(15,23,42,.62); backdrop-filter:blur(3px);
    }
    .result-class-required-dialog {
      position:relative; z-index:1; width:min(1080px,100%); box-sizing:border-box;
      padding:40px; border:1px solid #dbe4f0; border-radius:24px; background:#fff;
      color:#0f172a; box-shadow:0 24px 70px rgba(15,23,42,.3);
    }
    .result-class-required-head { display:flex; align-items:flex-start; justify-content:space-between; gap:24px; }
    .result-class-required-head h3 { margin:0; font-size:64px; line-height:1.05; font-weight:900; }
    .result-class-required-close {
      flex:0 0 82px; width:82px; height:82px; border:0; border-radius:18px;
      background:#f3e8ff; color:#7c3aed; font-size:64px; line-height:1; cursor:pointer;
    }
    .result-class-required-message { margin:34px 0 24px; font-size:42px; line-height:1.3; font-weight:800; }
    .result-class-required-select-wrap select {
      width:100%; min-height:82px; padding:12px 18px; border:3px solid #7c3aed;
      border-radius:16px; background:#fff; color:#0f172a; font-size:34px; font-weight:800;
      cursor:pointer;
    }
    .result-class-required-select-wrap select:focus { outline:5px solid rgba(124,58,237,.22); outline-offset:2px; }

    /* Riêng cảnh báo quyền Quản lí: cỡ chữ đúng 3 lần cảnh báo thường
       (28 -> 84, 18 -> 54; nút 16px mặc định -> 48px). */
    .alert-modal.is-manager-permission-warning .alert-dialog {
      max-width:min(1280px,calc(100vw - 32px)); margin-top:5vh; border-radius:32px;
    }
    .alert-modal.is-manager-permission-warning .alert-head {
      padding:42px 48px 18px; font-size:84px; line-height:1.05;
    }
    .alert-modal.is-manager-permission-warning .alert-body {
      padding:0 48px 42px; font-size:54px; line-height:1.42; font-weight:700;
    }
    .alert-modal.is-manager-permission-warning .alert-actions { padding:0 48px 44px; }
    .alert-modal.is-manager-permission-warning .alert-actions .nav-btn {
      min-height:96px; padding:16px 36px; border-radius:18px; font-size:48px;
    }
    @media (max-width:760px),(max-height:700px) {
      .result-class-required-dialog { padding:24px; border-radius:20px; }
      .result-class-required-head h3 { font-size:42px; }
      .result-class-required-close { width:62px; height:62px; flex-basis:62px; font-size:46px; }
      .result-class-required-message { margin:24px 0 18px; font-size:30px; }
      .result-class-required-select-wrap select { min-height:66px; font-size:26px; }
      .alert-modal.is-manager-permission-warning .alert-dialog { margin-top:3vh; }
      .alert-modal.is-manager-permission-warning .alert-head { padding:26px 28px 12px; font-size:48px; }
      .alert-modal.is-manager-permission-warning .alert-body { padding:0 28px 24px; font-size:32px; }
      .alert-modal.is-manager-permission-warning .alert-actions { padding:0 28px 28px; }
      .alert-modal.is-manager-permission-warning .alert-actions .nav-btn { min-height:64px; font-size:28px; }
    }

    .report-dialog {
      position: relative;
      z-index: 30001;
      width: 100vw;
      height: 100vh;
      background: #ffffff;
      border-radius: 0;
      box-shadow: none;
      border: 0;
      padding: 18px;
      display: flex;
      flex-direction: column;
      gap: 14px;
      overflow: hidden;
    }
    .report-head {
      display:grid;
      grid-template-columns: minmax(240px, .9fr) minmax(520px, 1.35fr) auto;
      align-items:center;
      gap:12px;
      padding-bottom: 6px;
      border-bottom: 1px solid #e5e7eb;
    }
    .report-head-summary {
      min-width:0;
      padding:0;
      border-bottom:0;
      background:transparent;
      align-self:center;
    }
    .report-sub { font-size: 14px; color:#64748b; margin-top: 4px; }
    .report-head-actions { display:flex; align-items:center; justify-content:flex-end; gap:10px; flex-wrap:wrap; }
    .report-filter-panel {
      display:grid;
      grid-template-columns: minmax(380px, 1.2fr) minmax(210px, .7fr);
      gap: 10px;
      min-width: 0;
    }
    .report-filter-box {
      display:flex;
      flex-direction:column;
      gap:10px;
      padding: 10px 12px;
      background:#f8fafc;
      border: 1px solid #dbe4f0;
      border-radius: 14px;
      min-width: 0;
      transition: .18s ease;
    }
    .report-filter-box.active {
      border-color:#93c5fd;
      background:#f8fbff;
      box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.08);
    }
    .report-filter-box.inactive {
      opacity:.8;
    }
    .report-box-title {
      font-size: 16px;
      font-weight: 800;
    }
    .report-normal-controls,
    .report-exam-controls {
      display:flex;
      align-items:flex-end;
      gap: 12px;
      flex-wrap: wrap;
      min-width: 0;
    }
    .report-normal-controls {
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }
    .report-mode-group { display:flex; flex-direction:row; gap:14px; align-items:center; flex-wrap:wrap; }
    .report-radio { display:flex; align-items:center; gap:8px; font-weight:700; color:#0f172a; white-space:nowrap; }
    .report-filter-grid {
      display:grid;
      grid-template-columns: minmax(0, 112px) minmax(0, 220px);
      gap: 10px;
      min-width:0;
      align-items:start;
    }
    .report-normal-controls .report-field {
      display:grid;
      grid-template-columns: auto 1fr;
      align-items:center;
      gap:8px;
      min-width:0;
    }
    .report-normal-controls .report-field label { margin:0; white-space:nowrap; }
    .report-normal-controls .report-field input { min-width:0; }
    .report-field { display:flex; flex-direction:column; gap:4px; min-width:0; }
    .report-field label { font-size: 12px; font-weight: 700; color:#475569; line-height:1.1; }
    .report-field input,
    .report-field select {
      height: 38px;
      width: 100%;
      padding: 0 10px;
      border-radius: 10px;
      border: 1px solid #cbd5e1;
      background:#ffffff;
      font-size: 14px;
      color:#0f172a;
      outline:none;
      box-sizing: border-box;
    }
    .report-field input:focus,
    .report-field select:focus { border-color:#1d4ed8; box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12); }
    .report-field input:disabled,
    .report-field select:disabled {
      background:#f8fafc;
      color:#94a3b8;
      cursor:not-allowed;
    }
    .report-preview-shell {
      min-height: 0;
      flex: 1 1 auto;
      border: 1px solid #e2e8f0;
      border-radius: 18px;
      background:#ffffff;
      display:flex;
      flex-direction:column;
      overflow:hidden;
    }
    .report-preview-head {
      padding: 16px 18px 12px;
      border-bottom: 1px solid #e5e7eb;
      background:#ffffff;
    }
    .report-head .report-preview-head {
      padding: 0;
      border-bottom: 0;
      background: transparent;
    }
    .report-preview-title { font-size: 18px; font-weight:800; color:#0f172a; line-height:1.2; }
    .report-preview-meta { font-size: 13px; color:#64748b; margin-top:4px; line-height:1.35; }
    .report-preview-wrap {
      flex:1 1 auto;
      min-height:0;
      overflow:auto;
      background:#ffffff;
    }
    .report-placeholder {
      margin: 18px;
      padding: 18px;
      border-radius: 16px;
      background:#f8fafc;
      border:1px dashed #cbd5e1;
      color:#64748b;
      font-size:15px;
    }
    .report-table {
      width:max-content;
      min-width:100%;
      border-collapse: separate;
      border-spacing: 0;
      font-size: 14px;
    }
    .report-table th, .report-table td {
      border-right: 1px solid #e2e8f0;
      border-bottom: 1px solid #e2e8f0;
      padding: 10px 12px;
      white-space: nowrap;
      background:#ffffff;
    }
    .report-table thead th {
      position: sticky;
      z-index: 4;
      background:#f8fafc;
      font-weight: 800;
      color:#0f172a;
    }
    .report-table thead tr:first-child th {
      top: 0;
      z-index: 7;
    }
    .report-table thead tr:nth-child(2) th {
      top: 44px;
      z-index: 6;
    }
    .report-table thead tr:nth-child(3) th {
      top: 88px;
      z-index: 5;
    }
    .report-table thead th.report-static-head {
      top: 0 !important;
      z-index: 8 !important;
      vertical-align: middle;
    }
    .report-table th.report-date-group {
      background:#eef2ff;
      text-align:center;
    }
    .report-table th.report-exam-group {
      background:#f8fafc;
      text-align:center;
      font-weight:800;
    }
    .report-table th:first-child, .report-table td:first-child {
      position: sticky;
      left: 0;
      z-index: 3;
      background:#ffffff;
      min-width: 72px;
      width: 72px;
      max-width: 72px;
      text-align:center;
    }
    .report-table th:nth-child(2), .report-table td:nth-child(2) {
      position: sticky;
      left: 72px;
      z-index: 3;
      background:#ffffff;
      min-width: 240px;
      width: 240px;
      max-width: 240px;
    }
    .report-table th:nth-child(3), .report-table td:nth-child(3) {
      position: sticky;
      left: 312px;
      z-index: 3;
      background:#ffffff;
      min-width: 120px;
      width: 120px;
      max-width: 120px;
      text-align:center;
    }
    .report-table th:nth-child(4), .report-table td:nth-child(4) {
      position: sticky;
      left: 432px;
      z-index: 3;
      background:#ffffff;
      min-width: 132px;
      width: 132px;
      max-width: 132px;
      text-align:center;
    }
    .report-table th:nth-child(n+5), .report-table td:nth-child(n+5) {
      min-width: 86px;
      width: 86px;
      max-width: 86px;
      text-align:center;
    }
    .report-table thead th:first-child,
    .report-table thead th:nth-child(2),
    .report-table thead th:nth-child(3),
    .report-table thead th:nth-child(4) {
      z-index: 5;
      background:#f8fafc;
      box-shadow: 1px 0 0 #e2e8f0;
    }
    .report-table tbody tr:nth-child(even) td { background:#fcfcfd; }
    .report-cell-center { text-align:center; }
    .report-ans-green { color:#16a34a; font-weight:800; }
    .report-ans-red { color:#dc2626; font-weight:800; }
    .report-ans-black { color:#0f172a; }
    /* Học sinh có kết quả cao nhất: chỉ tô ô Họ và tên; đồng hạng cùng tô. */
    .report-table td.report-top-student-name {
      background:#22c55e !important;
      color:#ffffff !important;
      font-weight:800;
    }

    @media (max-width: 1100px) {
      .report-head { grid-template-columns: 1fr; }
      .report-head-actions { justify-content:flex-start; }
      .report-filter-panel { grid-template-columns: 1fr; }
      .report-normal-controls,
      .report-exam-controls { align-items:stretch; }
      .report-normal-controls .report-field { grid-template-columns: auto 1fr; }
      .report-filter-grid { grid-template-columns: minmax(0, 112px) minmax(0, 1fr); grid-auto-flow:row; }
    }
    @media (max-width: 640px) {
      .report-dialog { padding: 12px; }
      .report-filter-grid { grid-template-columns: 1fr; grid-auto-flow:row; }
      .report-normal-controls .report-field { grid-template-columns: 1fr; align-items:stretch; gap:4px; }
      .report-title { font-size:22px; }
      .report-preview-title { font-size:18px; }
    }

    .merged-hero-actions {
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:18px;
    }
    .merged-grid-3 {
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap:16px;
    }
    .merged-grid-2 {
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap:16px;
    }
    .merged-box p:last-child,
    .merged-box ul:last-child { margin-bottom:0; }
    .merged-box ul {
      margin: 10px 0 0 18px;
      color: var(--muted);
      line-height: 1.7;
    }
    .merged-box li + li { margin-top: 6px; }
    .register-note {
      margin-top:12px;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.6;
    }
    .download-panel {
      display:grid;
      grid-template-columns: 1.4fr 1fr;
      gap: 18px;
      align-items:center;
    }
    .download-actions {
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      justify-content:flex-start;
    }
    .support-grid {
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:16px;
    }
    .policy-box h3 {
      margin: 0 0 10px;
      font-size: 18px;
    }
    .policy-box p, .policy-box li {
      color: var(--muted);
      line-height: 1.7;
    }
    .compact-note {
      color: var(--muted);
      font-size: 13px;
      margin-top: 8px;
    }
    @media (max-width: 1100px) {
      .merged-grid-3,
      .merged-grid-2,
      .support-grid,
      .download-panel {
        grid-template-columns: 1fr;
      }
    }

      @media (max-width: 620px) {
      .intro-title { font-size: 28px; letter-spacing: -0.5px; }
      .intro-text { font-size: 15px; }
    }

    #cv7991MatrixModal.cv7991-outline-matrix-mode .cv7991-matrix-editor-head { justify-content:flex-end !important; }
    #cv7991MatrixModal.cv7991-outline-matrix-mode .cv7991-editor-actions { width:100% !important; margin-left:auto !important; justify-content:flex-end !important; }

    .cv7991-nested-options {
      margin: 10px 0 0 28px;
      display: grid;
      gap: 8px;
    }
    .cv7991-code-count-inline-input {
      width: 90px;
      margin: 0 8px;
      text-align: center;
    }
    .cv7991-word-template-note {
      margin: 2px 2px 0;
      color: #64748b;
      font-size: 13px;
      line-height: 1.55;
    }
    .cv7991-word-template-grid {
      display:grid;
      grid-template-columns:1fr!important;
      gap:10px;
      margin-top:10px;
      align-items:start;
    }
    .cv7991-word-template-column {
      display:grid;
      gap:10px;
      align-content:start;
      min-width:0;
    }
    .cv7991-word-template-layout-2col{
      grid-template-columns:1fr!important;
    }
    .cv7991-word-template-grid label {
      display: grid;
      gap: 6px;
      font-weight: 800;
      color: #0f172a;
    }
    .cv7991-word-template-grid input {
      width:100%;
      box-sizing:border-box;
      border: 1px solid #cbd5e1;
      border-radius: 12px;
      padding: 10px 12px;
      font: inherit;
      background: #fff;
    }
    .cv7991-word-template-choice-row {
      display:flex;
      align-items:center;
      gap:10px;
      width:100%;
    }
    .cv7991-word-template-choice-row > label.cv7991-check {
      flex:1 1 auto;
      min-width:0;
      margin:0;
    }
    .cv7991-word-template-preview-btn {
      flex:0 0 auto;
      min-height:30px;
      padding:5px 12px;
      border:1px solid #93c5fd;
      border-radius:9px;
      background:#eff6ff;
      color:#1d4ed8;
      font-weight:900;
      cursor:pointer;
      white-space:nowrap;
    }
    .cv7991-word-template-preview-btn:hover {
      background:#dbeafe;
      border-color:#60a5fa;
    }

    #cv7991WordTemplateModal{
      inset:0!important;
      padding:0!important;
      align-items:stretch!important;
      justify-content:stretch!important;
    }
    #cv7991WordTemplateModal .cv7991-action-backdrop{
      inset:0!important;
    }
    #cv7991WordTemplateModal .cv7991-action-dialog-wide{
      width:100vw!important;
      height:100vh!important;
      max-width:none!important;
      max-height:none!important;
      margin:0!important;
      border:0!important;
      border-radius:0!important;
      display:grid!important;
      grid-template-rows:auto minmax(0,1fr);
      overflow:hidden!important;
    }
    #cv7991WordTemplateModal .cv7991-action-body{
      min-height:0;
      overflow:hidden;
      padding:0;
    }
    .cv7991-word-template-live-layout{
      height:100%;
      min-height:0;
      display:grid;
      grid-template-columns:396px minmax(0,1fr);
      gap:0;
    }
    .cv7991-word-template-live-controls{
      min-height:0;
      overflow:auto;
      padding:12px 12px 18px;
      border-right:1px solid #dbe5f1;
      background:#fff;
    }
    .cv7991-word-template-live-preview{
      min-width:0;
      min-height:0;
      display:grid;
      grid-template-rows:auto minmax(0,1fr);
      background:#e8eef5;
    }
    .cv7991-word-template-live-preview-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      min-height:46px;
      padding:8px 14px;
      border-bottom:1px solid #cbd5e1;
      background:#f8fafc;
      color:#0f172a;
      font-weight:900;
    }
    .cv7991-word-template-live-preview-label{
      color:#475569;
      font-weight:800;
      font-size:13px;
    }
    .cv7991-word-template-live-preview-scroll{
      min-height:0;
      overflow:auto;
      padding:18px;
    }
    .cv7991-word-template-live-page{
      width:min(900px,calc(100% - 18px));
      min-height:1075px;
      margin:0 auto 24px;
      box-sizing:border-box;
      padding:38px 42px 46px;
      background:#fff;
      color:#111827;
      font-family:"Times New Roman",serif;
      font-size:16px;
      line-height:1.3;
      box-shadow:0 6px 22px rgba(15,23,42,.18);
    }
    .cv7991-live-top{
      display:grid;
      grid-template-columns:39% 61%;
      align-items:start;
      margin-bottom:8px;
    }
    .cv7991-live-center{text-align:center}
    .cv7991-live-bold{font-weight:700}
    .cv7991-live-italic{font-style:italic}
    .cv7991-live-time{margin-top:2px;font-style:italic;text-align:center}
    .cv7991-live-table{
      width:100%;
      border-collapse:collapse;
      table-layout:fixed;
      margin:6px 0;
    }
    .cv7991-live-table td,.cv7991-live-table th{
      border:1px solid #111;
      padding:5px 6px;
      vertical-align:middle;
    }
    .cv7991-live-cut{
      border-top:1.5px dashed #333;
      margin:14px -42px 12px;
    }
    .cv7991-live-score-empty{height:50px}
    .cv7991-live-simple-head{
      display:grid;
      grid-template-columns:1fr auto;
      gap:12px;
      align-items:start;
      margin-bottom:4px;
    }
    .cv7991-live-simple-info{
      display:grid;
      grid-template-columns:1fr auto;
      gap:12px;
      margin-bottom:14px;
    }
    .cv7991-live-form3-info{
      display:grid;
      grid-template-columns:58% 23% 19%;
      gap:0;
      margin:12px 0 16px;
    }
    .cv7991-live-section{
      margin:14px 0 7px;
      font-weight:800;
    }
    .cv7991-live-question{margin:7px 0}
    .cv7991-live-qprompt{margin-bottom:4px}
    .cv7991-live-options{
      display:grid;
      gap:3px 20px;
      margin-left:18px;
    }
    .cv7991-live-options.cols4{grid-template-columns:repeat(4,minmax(0,1fr))}
    .cv7991-live-options.cols2{grid-template-columns:repeat(2,minmax(0,1fr))}
    .cv7991-live-options.cols1{grid-template-columns:1fr}
    .cv7991-live-tf{
      width:100%;
      border-collapse:collapse;
      table-layout:fixed;
      margin-top:5px;
    }
    .cv7991-live-tf td,.cv7991-live-tf th{
      border:1px solid #333;
      padding:4px 6px;
    }
    .cv7991-live-placeholder{
      color:#64748b;
      font-style:italic;
    }

    .cv7991-word-template-group-label{
      margin:4px 0 8px;padding:7px 10px;border-radius:8px;
      background:#eef6ff;color:#1e3a8a;font-weight:900;
    }

    .cv7991-word-template-group-box{
      margin:0 0 16px!important;
      padding:12px 12px 12px!important;
      border:3px solid #2563eb!important;
      border-radius:12px!important;
      background:#ffffff!important;
      box-shadow:0 2px 8px rgba(37,99,235,.10)!important;
    }
    .cv7991-word-template-info-box{border-color:#94a3b8!important}
    .cv7991-word-template-direct-box{border-color:#2563eb!important}
    .cv7991-word-template-separate-box{border-color:#0f9f8f!important}

    .cv7991-word-template-group-box + .cv7991-word-template-group-box{
      border-color:#0f9f8f!important;
      box-shadow:0 2px 8px rgba(15,159,143,.10)!important;
    }
    .cv7991-word-template-group-box .cv7991-word-template-group-label{
      margin:-2px -2px 10px!important;
      padding:8px 10px!important;
      border:0!important;
      border-radius:8px!important;
      background:#dbeafe!important;
      color:#1e3a8a!important;
      font-weight:900!important;
    }
    .cv7991-word-template-group-box + .cv7991-word-template-group-box .cv7991-word-template-group-label{
      background:#dff7f2!important;
      color:#0f766e!important;
    }
    .cv7991-word-template-group-box .cv7991-action-option:last-of-type{margin-bottom:0;}
    
    .cv7991-word-template-essay-lines{
      display:flex;align-items:center;gap:10px;flex-wrap:wrap;
      margin:10px 0 12px;padding:10px 12px;border:1px solid #dbe5f1;
      border-radius:10px;background:#f8fafc;
    }
    .cv7991-word-template-essay-lines label{font-weight:800;color:#334155}
    .cv7991-word-template-essay-lines input{
      width:82px;padding:7px 8px;border:1px solid #cbd5e1;border-radius:8px;
      text-align:center;font:inherit
    }
    .cv7991-live-tf-plain p{margin:4px 0}
    .cv7991-live-essay-work{margin-top:20px}
    .cv7991-live-essay-title{margin-bottom:5px;text-align:center;font-weight:900}
    .cv7991-live-essay-line{
      width:100%;height:1.5em;box-sizing:border-box;border-bottom:2px dotted #555
    }
    .cv7991-word-template-even-pages-option{
      margin:0 0 10px;
      padding:11px 12px;
      border:2px solid #f59e0b;
      border-radius:10px;
      background:#fffaf0;
      color:#7c2d12;
    }
    .cv7991-word-template-even-pages-option .cv7991-check{
      display:flex;
      align-items:center;
      gap:8px;
      margin:0;
    }
    .cv7991-word-template-even-pages-option input[type="checkbox"]{
      width:18px;
      height:18px;
      flex:none;
    }
    .cv7991-word-template-even-pages-note{
      margin:6px 0 0 26px;
      color:#92400e;
      font-size:12px;
      line-height:1.35;
    }
    .cv7991-word-template-left-export{
      display:flex;
      justify-content:flex-end;
      padding:2px 0 14px;
    }
    .cv7991-word-template-left-export #cv7991WordTemplateOkBtn{
      min-width:132px;
      min-height:42px;
      font-size:15px;
      font-weight:900;
    }

    @media(max-width:1000px){
      #cv7991WordTemplateModal .cv7991-action-dialog-wide{
        width:100vw!important;
        height:100vh!important;
      }
      .cv7991-word-template-live-layout{
        grid-template-columns:1fr;
        grid-template-rows:minmax(300px,44%) minmax(0,1fr);
      }
      .cv7991-word-template-live-controls{
        border-right:0;
        border-bottom:1px solid #dbe5f1;
      }
      .cv7991-word-template-live-page{
        width:700px;
      }
    }

    .cv7991-word-template-preview-dialog {
      width:min(92vw, 820px);
      max-height:90vh;
    }
    .cv7991-word-template-preview-body {
      display:flex;
      justify-content:center;
      align-items:flex-start;
      overflow:auto;
      max-height:72vh;
      padding:14px;
      background:#f8fafc;
    }
    .cv7991-word-template-preview-body img {
      display:block;
      max-width:100%;
      height:auto;
      background:#fff;
      border:1px solid #cbd5e1;
      box-shadow:0 10px 24px rgba(15,23,42,.12);
    }
    @media (max-width: 920px) {
      .cv7991-word-template-grid {
        grid-template-columns: 1fr;
      }
      .cv7991-word-template-choice-row {
        align-items:flex-start;
      }
    }
</style>

<style id="f19-regular-test-presenter-style">
    .single-exam-start-btn {
      min-height:34px; padding:0 12px; border-radius:10px; border:1px solid #22c55e;
      background:#ecfdf5; color:#047857; font-size:12px; font-weight:900; cursor:pointer; white-space:nowrap;
    }
    .single-exam-start-btn:hover:not(:disabled) { background:#dcfce7; border-color:#16a34a; }
    .single-exam-start-btn:disabled { opacity:.55; cursor:not-allowed; }
    .finish-auto-btn[hidden] { display:none !important; }

    .single-exam-presenter[hidden] { display:none !important; }
    .single-exam-presenter {
      position:fixed; left:0; right:0; top:74px; bottom:0; z-index:850;
      display:flex; flex-direction:column; background:#0f172a; color:#fff;
      box-shadow:0 24px 56px rgba(15,23,42,.30);
    }
    body.desktop-fixed-right .single-exam-presenter { right:var(--panel-w); }
    body.compact-view .single-exam-presenter { top:0; right:0; z-index:2200; }
    .single-exam-body { flex:1 1 auto; min-height:0; display:flex; }
    .single-exam-limited-note,
    .single-exam-side-stack,
    .single-exam-side-ads { display:none; }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-body {
      display:grid; grid-template-columns:minmax(0, 4fr) minmax(180px, 1fr); gap:16px; padding:16px; box-sizing:border-box;
      align-items:stretch;
    }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-slide {
      flex:none; width:100%; max-width:100%; min-height:0; height:auto; max-height:none;
      align-self:stretch; border-radius:20px;
    }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-side-stack {
      display:grid;
      grid-template-rows:minmax(0, 1fr) auto;
      gap:8px;
      min-width:0;
      min-height:0;
      align-self:stretch;
    }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-limited-note {
      display:flex; min-height:0; height:auto; align-self:stretch;
    }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-side-ads {
      display:grid;
      grid-template-rows:repeat(2, 92px);
      gap:8px;
      min-width:0;
    }
    .single-exam-ad-strip {
      display:none; flex:0 0 100px; min-height:100px; box-sizing:border-box;
      grid-template-columns:repeat(7, minmax(96px, 1fr)); gap:6px;
      padding:0 28px 4px; overflow-x:auto; overflow-y:hidden;
      background:#0f172a;
    }
    body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-ad-strip {
      display:grid;
    }
    .single-exam-ad-slot {
      min-width:0; min-height:92px; border-radius:10px; overflow:hidden;
      display:flex; align-items:center; justify-content:center; box-sizing:border-box;
    }
    .single-exam-ad-slot.is-filled {
      background:#fff; border:1px solid rgba(203,213,225,.9);
      box-shadow:0 4px 14px rgba(15,23,42,.22);
      text-decoration:none;
    }
    .single-exam-ad-slot.is-empty { visibility:hidden; }
    .single-exam-ad-img {
      display:block; width:100%; height:100%; max-width:100%; max-height:100%;
      object-fit:contain; padding:6px; box-sizing:border-box;
    }
    @media (max-width:760px) {
      body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-body {
        grid-template-columns:minmax(0, 3fr) minmax(124px, 1fr); gap:8px; padding:8px;
      }
      body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-side-ads,
      body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads {
        grid-template-rows:repeat(2, 80px);
      }
      .single-exam-ad-strip { flex-basis:88px; min-height:88px; padding:0 10px 4px; grid-template-columns:repeat(7, minmax(78px, 1fr)); }
      .single-exam-ad-slot { min-height:80px; }
      body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip .single-exam-ad-slot,
      body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads .single-exam-ad-slot { min-height:80px; }
      body.mvip-tier-limited.exam-mode-expanded .student-board-shell {
        grid-template-columns:minmax(0, 3fr) minmax(124px, 1fr);
        grid-template-rows:minmax(0, 1fr) 88px;
        gap:8px;
      }
      body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip {
        min-height:88px;
        grid-template-columns:repeat(7, minmax(78px, 1fr));
      }
    }
    @media (max-height:620px) {
      body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-side-ads,
      body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads {
        grid-template-rows:repeat(2, 72px);
      }
      .single-exam-ad-strip { flex-basis:80px; min-height:80px; }
      body.mvip-tier-limited.exam-mode-expanded .student-board-shell { grid-template-rows:minmax(0, 1fr) 80px; }
      body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip { min-height:80px; }
      .single-exam-ad-slot { min-height:72px; }
      body.mvip-tier-limited.exam-mode-expanded .exam-mode-ad-strip .single-exam-ad-slot,
      body.mvip-tier-limited.exam-mode-expanded .student-board-side-ads .single-exam-ad-slot { min-height:72px; }
    }
    .single-exam-toolbar {
      display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
      padding:10px 14px; background:#ffffff; color:#0f172a; border-bottom:1px solid #dbe4f0;
    }
    .single-exam-toolbar-title { display:flex; flex-direction:column; gap:2px; min-width:0; }
    .single-exam-toolbar-title strong { font-size:16px; line-height:1.2; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
    .single-exam-toolbar-title span { color:#64748b; font-size:12px; font-weight:800; }
    .single-exam-toolbar-actions { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
    .single-exam-class-select {
      width:clamp(85px, 9vw, 125px); height:36px; box-sizing:border-box; padding:0 25px 0 7px;
      border:2px solid #0f766e; border-radius:10px; background:#f0fdfa; color:#134e4a;
      font-size:12px; font-weight:900; outline:none; cursor:pointer;
    }
    .single-exam-class-select:focus { border-color:#0d9488; box-shadow:0 0 0 3px rgba(13,148,136,.16); }
    .single-exam-class-select:disabled { opacity:.55; cursor:not-allowed; }
    .single-exam-answer-btn {
      min-height:36px; padding:0 14px; border-radius:12px; border:2px solid #dc2626;
      background:#fff; color:#b91c1c; font-weight:900; cursor:pointer; white-space:nowrap;
    }
    .single-exam-answer-btn:hover:not(:disabled) { background:#fff5f5; border-color:#dc2626; }
    .single-exam-answer-btn.is-active { background:#b91c1c; border-color:#b91c1c; color:#fff; }
    .single-exam-answer-btn.is-active:hover:not(:disabled) { background:#991b1b; border-color:#991b1b; }
    .single-exam-answer-btn:disabled { opacity:.5; cursor:not-allowed; }
    .single-exam-tf-answer-mark {
      margin-left:.32em; vertical-align:.08em; white-space:nowrap;
    }
    .single-exam-countdown-input {
      width:118px; height:36px; box-sizing:border-box; padding:0 9px; border-radius:10px;
      border:2px solid #2563eb; background:#fff; color:#0f172a;
      font-size:16px; font-weight:900; line-height:1; text-align:center; font-variant-numeric:tabular-nums;
      outline:none; transition:background .16s ease, color .16s ease, border-color .16s ease, box-shadow .16s ease;
    }
    .single-exam-countdown-input::placeholder { color:#64748b; font-size:13px; font-weight:800; opacity:1; }
    .single-exam-countdown-input:hover { border-color:#1d4ed8; }
    .single-exam-countdown-input:focus { border-color:#1d4ed8; box-shadow:0 0 0 3px rgba(37,99,235,.16); }
    .single-exam-countdown-input.is-running { background:#eff6ff; color:#1d4ed8; cursor:pointer; }
    .single-exam-countdown-input::-webkit-outer-spin-button,
    .single-exam-countdown-input::-webkit-inner-spin-button { margin:0; -webkit-appearance:none; }
    .single-exam-countdown-input[type=number] { appearance:textfield; -moz-appearance:textfield; }
    .single-exam-guide-btn {
      min-height:36px; min-width:164px; padding:0 16px; border-radius:12px;
      border:2px solid #0f766e; background:#fff; color:#0f766e;
      display:inline-flex; align-items:center; justify-content:center;
      font-weight:900; cursor:pointer; white-space:nowrap;
      transition:background .16s ease, color .16s ease, border-color .16s ease;
    }
    .single-exam-guide-btn[hidden] { display:none !important; }
    .single-exam-guide-btn:hover:not(:disabled) { background:#f0fdfa; border-color:#115e59; color:#115e59; }
    .single-exam-guide-btn:disabled { opacity:.5; cursor:not-allowed; }
    .single-exam-guide-btn:focus-visible { outline:3px solid #fde047; outline-offset:2px; }
    .single-exam-toolbar-guide-btn { min-width:124px; padding:0 14px; }
    .single-exam-guide-modal[hidden] { display:none !important; }
    .single-exam-guide-modal {
      position:absolute; inset:0; z-index:120; display:flex; align-items:flex-end; justify-content:flex-end;
      padding:clamp(14px, 3vw, 34px); box-sizing:border-box;
    }
    .single-exam-guide-backdrop { position:absolute; inset:0; background:transparent; backdrop-filter:none; -webkit-backdrop-filter:none; }
    .single-exam-guide-dialog {
      position:relative; z-index:1; width:min(784px, 96%); max-height:min(82vh, 760px);
      display:flex; flex-direction:column; overflow:hidden;
      background:#fff; color:#0f172a; border:2px solid #0f766e; border-radius:22px;
      box-shadow:0 28px 80px rgba(15,23,42,.45);
      transform:translate3d(var(--single-exam-guide-x, 0px), var(--single-exam-guide-y, 0px), 0);
      will-change:transform;
    }
    .single-exam-guide-dialog.is-dragging { box-shadow:0 34px 96px rgba(15,23,42,.58); }
    .single-exam-guide-head {
      flex:0 0 auto; display:grid; grid-template-columns:minmax(0, 1fr) auto minmax(0, 1fr);
      align-items:center; gap:14px;
      padding:14px 18px; background:#f0fdfa; border-bottom:1px solid #99f6e4;
      cursor:grab; user-select:none; -webkit-user-select:none; touch-action:none;
    }
    .single-exam-guide-dialog.is-dragging .single-exam-guide-head { cursor:grabbing; }
    .single-exam-guide-head-text { min-width:0; justify-self:start; }
    .single-exam-guide-head h3 { margin:0; color:#115e59; font-size:clamp(21px, 2.2vw, 30px); line-height:1.2; }
    .single-exam-guide-answer {
      justify-self:center; min-width:176px; min-height:40px; box-sizing:border-box; padding:0 16px;
      display:inline-flex; align-items:center; justify-content:center;
      border:2px solid #2563eb; border-radius:8px; background:#fff; color:#1d4ed8;
      font-size:clamp(16px, 1.45vw, 20px); font-weight:900; line-height:1.2; white-space:nowrap;
      pointer-events:none;
    }
    .single-exam-guide-answer[hidden] { display:none !important; }
    .single-exam-guide-close {
      justify-self:end; min-width:74px; min-height:38px; padding:0 14px; border-radius:11px;
      border:2px solid #dc2626; background:#fff; color:#dc2626; font-weight:900; cursor:pointer;
    }
    .single-exam-guide-close:hover { background:#fef2f2; border-color:#b91c1c; color:#b91c1c; }
    .single-exam-guide-content {
      flex:1 1 auto; min-height:0; overflow:auto; padding:clamp(18px, 3vw, 34px);
      background:#fff; color:#111827; font-size:clamp(20px, 2.15vw, 30px); line-height:1.55;
      text-align:left; overflow-wrap:anywhere;
    }
    .single-exam-guide-content .single-exam-inline-media { max-width:100%; max-height:320px; }
    .single-exam-guide-content .single-exam-inline-vector { max-width:100%; }
    .single-exam-guide-empty {
      min-height:180px; display:flex; align-items:center; justify-content:center;
      color:#b91c1c; font-size:clamp(24px, 3vw, 38px); font-weight:900; text-align:center;
    }
    @media (max-width:720px) {
      .single-exam-guide-btn { min-width:142px; padding:0 12px; }
      .single-exam-toolbar-guide-btn { min-width:112px; padding:0 10px; }
      .single-exam-guide-modal { padding:10px; }
      .single-exam-guide-dialog { width:100%; max-height:88vh; border-radius:16px; }
      .single-exam-guide-head { padding:10px 12px; gap:8px; }
      .single-exam-guide-answer { min-width:142px; min-height:36px; padding:0 10px; font-size:15px; }
      .single-exam-guide-content { padding:16px; }
    }
    @media (max-width:480px) {
      .single-exam-guide-head { grid-template-columns:minmax(0, 1fr) auto; }
      .single-exam-guide-answer { grid-column:1 / -1; grid-row:2; justify-self:stretch; min-width:0; }
      .single-exam-guide-close { grid-column:2; grid-row:1; }
    }
    .single-exam-nav-btn {
      min-width:42px; height:36px; padding:0 12px; border-radius:12px; border:1px solid #cbd5e1;
      background:#fff; color:#334155; font-weight:900; font-size:20px; line-height:1; cursor:pointer;
      display:inline-flex; align-items:center; justify-content:center;
    }
    .single-exam-nav-btn:hover:not(:disabled) { background:#f8fafc; border-color:#94a3b8; }
    .single-exam-nav-btn:disabled { opacity:.45; cursor:not-allowed; }
    .regular-test-qstate {
      min-height:36px; padding:0 12px; border-radius:12px; border:1px solid #cbd5e1;
      background:#f8fafc; color:#475569; font-weight:900; display:inline-flex; align-items:center;
    }
    .regular-test-qstate.done { background:#ecfdf5; border-color:#22c55e; color:#15803d; }
    .regular-test-qstate.pending { background:#fff7ed; border-color:#fdba74; color:#c2410c; }
    .regular-test-qstate[hidden], .single-exam-next-btn[hidden] { display:none !important; }
    .single-exam-next-btn,
    .single-exam-view-btn {
      min-height:36px; padding:0 18px; border-radius:12px; border:1px solid #16a34a;
      background:#16a34a; color:#fff; font-weight:900; cursor:pointer;
      box-shadow:0 10px 20px rgba(22,163,74,.22);
    }
    .single-exam-view-btn {
      border-color:#7c3aed; background:#7c3aed;
      box-shadow:0 10px 20px rgba(124,58,237,.18);
    }
    .single-exam-next-btn:hover:not(:disabled) { background:#15803d; border-color:#15803d; }
    .single-exam-view-btn:hover:not(:disabled) { background:#6d28d9; border-color:#6d28d9; }
    .single-exam-next-btn:disabled,
    .single-exam-view-btn:disabled { opacity:.55; cursor:not-allowed; box-shadow:none; }
    .single-exam-close-btn {
      min-height:36px; min-width:44px; padding:0 14px; border-radius:12px; border:2px solid #dc2626;
      background:#fff; color:#dc2626; font-weight:900; cursor:pointer;
    }
    .single-exam-close-btn:hover { background:#fef2f2; border-color:#b91c1c; color:#b91c1c; }
    .single-exam-fullscreen-btn {
      min-height:36px; min-width:148px; padding:0 18px; border-radius:12px;
      border:2px solid #2563eb; background:#fff; color:#1d4ed8;
      display:inline-flex; align-items:center; justify-content:center;
      font-weight:900; cursor:pointer; box-shadow:none; white-space:nowrap;
      transition:background .16s ease, color .16s ease, border-color .16s ease;
    }
    .single-exam-fullscreen-btn:hover { background:#eff6ff; border-color:#1d4ed8; }
    .single-exam-fullscreen-btn.is-fullscreen { background:#1d4ed8; border-color:#1d4ed8; color:#fff; }
    .single-exam-fullscreen-btn.is-fullscreen:hover { background:#1e40af; border-color:#1e40af; }
    .single-exam-fullscreen-btn:focus-visible { outline:3px solid #fde047; outline-offset:2px; }
    .single-exam-region-btn {
      min-height:36px; min-width:120px; padding:0 16px; border-radius:12px;
      border:2px solid #ea580c; background:#fff; color:#c2410c;
      display:inline-flex; align-items:center; justify-content:center;
      font-weight:900; cursor:pointer; white-space:nowrap;
    }
    .single-exam-region-btn:hover:not(:disabled) { background:#fff7ed; border-color:#c2410c; }
    .single-exam-region-btn.is-selecting { background:#fff7ed; }
    .single-exam-region-btn.is-zoomed { background:#c2410c; border-color:#c2410c; color:#fff; }
    .single-exam-region-btn:disabled { opacity:.55; cursor:not-allowed; }
    .single-exam-presenter:fullscreen,
    .single-exam-presenter:-webkit-full-screen,
    body.single-exam-fullscreen-fallback .single-exam-presenter {
      inset:0 !important; width:100vw !important; height:100vh !important;
      z-index:99999 !important; border-radius:0 !important;
    }
    body.single-exam-fullscreen-fallback { overflow:hidden !important; }
    .single-exam-slide {
      flex:1 1 auto; min-height:0; overflow:auto;
      display:flex; flex-direction:column; align-items:center; justify-content:center; gap:min(4vh, 30px);
      padding:min(5vh, 42px) min(4vw, 48px);
      background:
        radial-gradient(circle at 20% 20%, rgba(255,255,255,.12), transparent 24%),
        radial-gradient(circle at 80% 10%, rgba(34,197,94,.12), transparent 28%),
        linear-gradient(135deg, #1f2937 0%, #3f3f46 45%, #111827 100%);
      position:relative;
    }
    .single-exam-slide::before {
      content:""; position:absolute; inset:0; pointer-events:none; opacity:.16;
      background-image: radial-gradient(rgba(255,255,255,.45) 1px, transparent 1px);
      background-size: 5px 5px;
    }
    .single-exam-question-box,
    .single-exam-options-grid,
    .single-exam-end-box { position:relative; z-index:1; }
    .single-exam-question-box {
      width:min(96%, 1120px); min-height:clamp(120px, 21vh, 220px);
      border:4px solid #22c55e; border-radius:34px;
      display:flex; align-items:center; justify-content:center; text-align:center;
      padding:clamp(18px, 3.2vw, 42px);
      background:rgba(15,23,42,.24); color:#fff; font-weight:900;
      font-size:clamp(28px, 3.2vw, 54px); line-height:1.18;
      text-shadow:0 2px 4px rgba(0,0,0,.35);
      white-space:pre-line;
    }
    .single-exam-question-content { display:block; width:100%; text-align:center; white-space:normal; }
    .single-exam-question-prefix { display:inline; white-space:nowrap; }
    .single-exam-question-content .single-exam-rich { display:inline; max-width:none; }
    .single-exam-options-grid {
      width:min(96%, 1120px); display:grid; grid-template-columns:repeat(2, minmax(0,1fr));
      gap:clamp(14px, 2.6vw, 30px);
    }
    .single-exam-option {
      min-height:clamp(104px, 16vh, 170px); border:3px solid #22c55e; border-radius:24px;
      background:rgba(255,255,255,.12); color:#fff; display:flex; align-items:center; justify-content:center;
      text-align:center; padding:clamp(14px, 2.4vw, 28px); font-size:clamp(25px, 2.7vw, 44px);
      line-height:1.2; font-weight:700; text-shadow:0 2px 3px rgba(0,0,0,.32);
      white-space:pre-line;
    }
    .single-exam-option b { font-weight:900; margin-right:.25em; }
    .single-exam-option.is-correct-answer {
      border-color:#ef4444 !important; background:#b91c1c !important; color:#fff !important;
      box-shadow:0 0 0 4px rgba(248,113,113,.28), 0 12px 30px rgba(127,29,29,.30);
    }
    .single-exam-rich { display:inline-block; max-width:100%; }
    .single-exam-inline-media {
      display:inline-block; vertical-align:middle; width:auto; height:auto; max-width:min(100%, 760px); max-height:220px;
      aspect-ratio:auto; object-fit:contain; margin:.08em .16em; background:rgba(255,255,255,.96);
      border-radius:10px; padding:4px 6px; box-shadow:0 4px 14px rgba(0,0,0,.22);
    }
    .single-exam-option .single-exam-inline-media { max-width:92%; max-height:140px; }
    .single-exam-question-box .single-exam-inline-media { max-height:240px; }
    .single-exam-inline-vector { display:inline-flex; align-items:center; justify-content:center; vertical-align:middle; margin:.08em .16em; line-height:0; }
    .single-exam-inline-vector svg { width:100%; height:100%; max-width:100%; max-height:100%; overflow:visible; }
    .single-exam-word-group-figure { position:relative; overflow:visible; }
    .cv7991-word-group-html-label {
      position:absolute; z-index:4; display:block; width:max-content;
      max-width:none; margin:0; padding:0; border:0; background:transparent;
      color:#111111 !important; font-family:'Times New Roman', Times, serif;
      font-weight:400; font-style:normal; line-height:1; white-space:pre;
      text-align:center; text-shadow:none; pointer-events:none;
      transform:translate(-50%,-50%); transform-origin:center center;
    }
    .single-exam-inline-fallback {
      display:inline-block; padding:.08em .28em; border-radius:8px; background:rgba(255,255,255,.14);
      border:1px dashed rgba(255,255,255,.38); font-size:.72em; font-style:italic;
    }
    .single-exam-inline-table {
      border-collapse:collapse; margin:10px auto; max-width:100%; background:rgba(255,255,255,.96);
      color:#0f172a; text-shadow:none; font-size:.55em;
    }
    .single-exam-inline-table td {
      border:2px solid #cbd5e1; padding:6px 10px; min-width:42px; vertical-align:middle;
    }
    .single-exam-inline-table .cv7991-word-table-paragraph {
      display:block; margin:0; padding:0; min-height:1em;
    }
    .single-exam-inline-table tr.cv7991-table-title-row > td {
      font-size:50% !important; line-height:1.12 !important;
    }
    .single-exam-inline-table.cv7991-textbox-table {
      width:100%; max-width:100%; table-layout:fixed;
      margin:.22em auto; font-size:.78em; line-height:1;
      background:#fff; color:#111827;
    }
    .single-exam-inline-table.cv7991-textbox-table > tbody { height:100%; }
    .single-exam-inline-table.cv7991-textbox-table > tbody > tr { max-height:none; }
    .single-exam-inline-table.cv7991-textbox-table td,
    .single-exam-inline-table.cv7991-textbox-table th {
      min-width:0; padding:.03em .08em; box-sizing:border-box;
      line-height:1; overflow:visible;
    }
    .single-exam-inline-table.cv7991-textbox-table .cv7991-word-table-paragraph {
      margin:0; padding:0; min-height:0; line-height:1; white-space:nowrap;
    }
    .single-exam-inline-table.cv7991-textbox-table .mvip-ordinary-live-mathtype,
    .single-exam-inline-table.cv7991-textbox-table .mvip-interactive-live-mathtype,
    .single-exam-inline-table.cv7991-textbox-table .single-exam-inline-formula {
      margin:0 !important; padding:0 !important; border:0 !important;
      box-shadow:none !important; background:transparent !important;
      font-size:1em !important; line-height:1 !important;
      vertical-align:baseline !important;
    }
    .single-exam-frac {
      display:inline-grid; grid-template-rows:auto auto; align-items:stretch; justify-items:stretch;
      vertical-align:-.34em; margin:0 .12em; line-height:1.02;
      text-align:center; min-width:max-content; white-space:nowrap;
    }
    .single-exam-frac .num,
    .single-exam-frac .den {
      display:block; width:100%; box-sizing:border-box; text-align:center;
      white-space:nowrap;
    }
    .single-exam-frac .num {
      padding:0 .18em .05em; border-bottom:.065em solid currentColor;
    }
    .single-exam-frac .den {
      padding:.05em .18em 0;
    }
    .single-exam-rad {
      display:inline-flex; align-items:flex-start; vertical-align:-.06em; position:relative;
      line-height:1; white-space:nowrap;
    }
    .single-exam-rad .rad-sign {
      font-family:"Cambria Math", "Times New Roman", Times, serif;
      font-size:1.22em; line-height:.92; margin-right:-.2em; transform:translateY(.035em);
      position:relative; z-index:2;
    }
    .single-exam-rad .rad-body {
      position:relative; padding:.035em .14em 0 .22em; margin-top:.035em;
    }
    .single-exam-rad .rad-body::before {
      content:""; position:absolute; left:-.2em; right:0; top:0;
      border-top:.065em solid currentColor; z-index:1;
    }
    .single-exam-system {
      display:inline-flex; align-items:center; vertical-align:middle;
      white-space:nowrap; margin:0 .12em; line-height:1;
    }
    .single-exam-system .system-brace {
      font-family:"Cambria Math", "Times New Roman", Times, serif;
      font-size:2.28em; line-height:.74; padding-right:.05em; transform:scaleX(.78);
      transform-origin:center center;
    }
    .single-exam-system .system-rows {
      display:inline-flex; flex-direction:column; align-items:flex-start; justify-content:center;
      gap:.08em; line-height:1.05;
    }
    .single-exam-system .system-row { display:block; white-space:nowrap; }
    .single-exam-eqarr {
      display:inline-flex; flex-direction:column; align-items:flex-start; justify-content:center;
      gap:.08em; vertical-align:middle; line-height:1.05; white-space:nowrap;
    }
    .single-exam-matrix-gap { display:inline-block; width:.8em; }
    /* SVG do MathJax tạo đã mang sẵn độ sâu (depth) chính xác trong thuộc tính
       vertical-align của chính SVG. Không hạ thêm cả hộp công thức, vì như vậy
       phần chân của số/chữ chính sẽ thấp hơn chân chữ thường bên ngoài. */
    .single-exam-mathjax-equation { display:inline-block; vertical-align:baseline; white-space:nowrap; max-width:100%; }
    .single-exam-mathjax-equation > svg { max-width:100%; overflow:visible; vertical-align:inherit; }
    .single-exam-end-box {
      width:min(92%, 900px); border:4px solid #22c55e; border-radius:34px; background:rgba(15,23,42,.34);
      padding:42px; text-align:center; font-size:clamp(30px, 4vw, 58px); font-weight:900; line-height:1.2;
      text-shadow:0 2px 4px rgba(0,0,0,.35);
    }
    .single-exam-image-wrap {
      width:100%; height:100%; flex:1 1 0; min-width:0; min-height:0;
      display:flex; align-items:center; justify-content:center;
      position:relative; z-index:1; overflow:hidden;
      padding:0;
    }
    .single-exam-captured-image {
      display:block; width:100%; height:100%; max-width:100%; max-height:100%;
      object-fit:contain; object-position:center; aspect-ratio:auto;
      border-radius:0; box-shadow:none; background:#fff;
      image-rendering:auto;
    }
    .single-exam-slide.single-exam-image-mode {
      padding:12px !important; gap:0 !important;
      align-items:center !important; justify-content:center !important;
      overflow:hidden !important;
    }
    .single-exam-slide.single-exam-image-mode .single-exam-image-wrap {
      aspect-ratio:16 / 9;
      width:100% !important; height:auto !important; max-height:100% !important;
      flex:0 1 auto !important; align-self:center !important;
      background:#fff;
    }
    .single-exam-image-wrap.single-exam-region-selecting { cursor:crosshair; }
    .single-exam-image-wrap.single-exam-region-zoomed { background:#fff; }
    .single-exam-captured-image.single-exam-region-base-hidden { opacity:0; }
    .single-exam-region-overlay {
      position:absolute; inset:0; z-index:4; cursor:crosshair; touch-action:none;
      background:rgba(15,23,42,.06);
    }
    .single-exam-region-selection-box {
      position:absolute; border:3px solid #ef4444; background:rgba(239,68,68,.10);
      box-shadow:0 0 0 9999px rgba(15,23,42,.08); pointer-events:none;
    }
    .single-exam-region-zoom-pane {
      position:absolute; inset:0; z-index:3; overflow:hidden; background:#fff;
    }
    .single-exam-region-zoom-pane img {
      position:absolute; display:block; max-width:none; max-height:none; user-select:none; -webkit-user-drag:none;
    }
    .single-exam-capture-stage {
      position:fixed; left:-100000px; top:0; width:auto; height:auto; pointer-events:none;
      opacity:1; overflow:visible; z-index:-9999;
    }
    .single-exam-word-card {
      display:inline-block; width:max-content; max-width:none; box-sizing:border-box;
      background:#fff; color:#111827; padding:18px 20px 17px;
      font-family:"Times New Roman", Times, serif;
      font-size:30px; line-height:1.28; font-weight:400; text-align:left;
      text-shadow:none; border:0; border-radius:0; overflow:visible;
    }
    .single-exam-word-card.is-tall-layout {
      padding:22px 28px 20px;
      line-height:1.34;
    }
    .single-exam-word-question {
      display:block; margin:0; padding:0; white-space:normal; word-break:normal;
      max-width:1180px;
    }
    .single-exam-word-question-label {
      display:inline; font-weight:700; white-space:nowrap; margin-right:.18em;
    }
    .single-exam-word-card .single-exam-rich { display:inline; max-width:none; }
    .single-exam-word-options {
      display:grid; grid-template-columns:minmax(0, 1fr); grid-auto-flow:row;
      align-items:start; justify-items:stretch; column-gap:0; row-gap:6px;
      margin-top:10px; width:100%; max-width:none;
    }
    .single-exam-word-option-row { display:contents; }
    .single-exam-word-option {
      display:inline-flex; align-items:center; gap:4px;
      width:100%; max-width:100%; min-width:0; padding:0; margin:0; break-inside:avoid;
    }
    .single-exam-word-option-label {
      flex:0 0 2.15ch; min-width:2.15ch; align-self:stretch;
      display:flex; align-items:center; justify-content:flex-start;
      font-weight:700; white-space:nowrap; line-height:1.2;
    }
    .single-exam-word-option-body {
      flex:1 1 auto; display:block; align-self:center;
      width:auto; max-width:100%; min-width:0; overflow:visible; white-space:normal;
      line-height:1.2;
    }
    .single-exam-word-option-body > * { margin-top:0 !important; margin-bottom:0 !important; }
    .single-exam-word-option-body > br:first-child { display:none; }
    .single-exam-word-option-body > .single-exam-rich,
    .single-exam-word-option-body > span,
    .single-exam-word-option-body > div,
    .single-exam-word-option-body > p { display:inline !important; }
    .single-exam-word-options.is-stacked {
      display:grid; grid-template-columns:minmax(0, 1fr);
      column-gap:0; row-gap:6px; width:100%; max-width:1240px;
      justify-items:stretch;
    }
    .single-exam-word-options.is-stacked .single-exam-word-option-row { display:contents; }
    .single-exam-word-options.is-stacked .single-exam-word-option {
      width:100%; max-width:none; align-items:center;
    }
    .single-exam-word-options.is-stacked .single-exam-word-option-body {
      flex:1 1 auto; width:auto; max-width:none; white-space:normal;
    }
    .single-exam-word-card .single-exam-inline-media {
      display:inline-block; vertical-align:middle; width:auto; height:auto; aspect-ratio:auto; object-fit:contain; object-position:center; max-width:100%; max-height:190px;
      margin:0 .08em; padding:0; border:0; border-radius:0; background:transparent; box-shadow:none;
    }
    .single-exam-word-media-panel > img,
    .single-exam-word-media-panel > canvas {
      width:auto; height:auto; object-position:right bottom;
    }
    .single-exam-word-media-panel .cv7991-normalized-figure {
      display:block; flex:0 0 auto; object-fit:fill;
    }
    .single-exam-word-media-panel .single-exam-inline-vector > svg {
      display:block;
    }
    .single-exam-word-card .single-exam-inline-formula {
      max-width:none !important;
      max-height:none !important;
      margin:0 .04em !important;
      vertical-align:-.22em;
    }
    .single-exam-word-option-body > :first-child.single-exam-inline-formula,
    .single-exam-word-option-body > .single-exam-rich:first-child .single-exam-inline-formula:first-child {
      margin-left:0 !important;
    }
    .single-exam-word-card .single-exam-inline-vector { display:inline-flex; vertical-align:middle; align-items:center; justify-content:center; margin:0 .08em; line-height:0; }
    .single-exam-word-card .single-exam-word-group-figure {
      display:block; width:auto; height:auto; max-width:92%; max-height:360px;
      margin:.24em auto .28em !important; vertical-align:middle; line-height:0;
    }
    .single-exam-word-card .single-exam-word-group-figure > svg {
      display:block; width:100%; height:100%; overflow:visible;
    }
    .single-exam-word-card .single-exam-inline-vector svg { width:100%; height:100%; max-width:100%; max-height:190px; overflow:visible; }
    .single-exam-word-card .single-exam-inline-fallback {
      display:inline; padding:0; border:0; border-radius:0; background:transparent;
      color:#111827; font-size:.82em; font-style:italic;
    }
    .single-exam-word-card .single-exam-inline-table {
      border-collapse:collapse; margin:8px 0; max-width:100%; background:#fff;
      color:#111827; text-shadow:none; font-size:.8em;
    }
    .single-exam-word-card .single-exam-inline-table td {
      border:1px solid #111827; padding:4px 8px; min-width:36px; vertical-align:middle;
      white-space:nowrap; word-break:keep-all; overflow-wrap:normal;
    }
    .single-exam-word-card sup { font-size:.7em; line-height:0; vertical-align:super; }
    .single-exam-word-card sub { font-size:.7em; line-height:0; vertical-align:sub; }
    @media (max-width: 900px) {
      .single-exam-options-grid { grid-template-columns:1fr; }
      .single-exam-question-box { font-size:clamp(24px, 6vw, 38px); min-height: clamp(168px, 28vh, 250px); }
      .single-exam-option { font-size:clamp(22px, 5.4vw, 34px); min-height:86px; }
    }
    body.desktop-fixed-right .single-exam-start-btn { min-height:28px; padding:0 8px; border-radius:8px; font-size:11px; }

  .single-exam-slide {
    gap: clamp(16px, 2.4vh, 24px) !important;
    padding: clamp(12px, 1.8vh, 20px) clamp(12px, 1.15vw, 18px) 34px !important;
  }
  .single-exam-question-box,
  .single-exam-options-grid {
    width: min(100%, 1600px) !important;
    max-width: none !important;
    box-sizing: border-box !important;
  }
  .single-exam-question-box {
    min-height: clamp(198px, 33vh, 345px) !important;
    padding: clamp(18px, 2.4vw, 34px) !important;
    border-radius: 28px !important;
  }
  .single-exam-options-grid {
    gap: clamp(12px, 1.55vw, 20px) !important;
    margin-top: clamp(18px, 3.2vh, 36px) !important;
  }
  .single-exam-option {
    min-height: clamp(108px, 16.5vh, 178px) !important;
    padding: clamp(12px, 1.75vw, 22px) !important;
    border-radius: 22px !important;
    box-sizing: border-box !important;
  }
  .single-exam-presenter:fullscreen .single-exam-slide,
  .single-exam-presenter.single-exam-expanded .single-exam-slide,
  .single-exam-presenter:-webkit-full-screen .single-exam-slide {
    padding-left: clamp(16px, 1.6vw, 30px) !important;
    padding-right: clamp(16px, 1.6vw, 30px) !important;
  }
  @media (max-width: 900px) {
    .single-exam-slide {
      padding: 10px 8px 30px !important;
      gap: 10px !important;
    }
    .single-exam-question-box,
    .single-exam-options-grid {
      width: 100% !important;
    }
  }

    body.single-exam-presenting .result-modal,
    .result-modal.is-word-question-result { pointer-events:none; }
    body.single-exam-presenting .result-modal-backdrop,
    .result-modal.is-word-question-result .result-modal-backdrop { display:none; }
    body.single-exam-presenting .result-dialog,
    .result-modal.is-word-question-result .result-dialog {
      pointer-events:auto;
      left:max(12px, calc((100vw - var(--panel-w, 0px) - 760px) / 2));
      top:12px;
      transform:none;
      width:min(760px, calc(100vw - var(--panel-w, 0px) - 24px));
      box-sizing:border-box;
      min-height:0;
      padding:12px 18px;
      border-radius:18px;
      box-shadow:0 18px 44px rgba(15,23,42,.24);
      display:grid;
      grid-template-columns:minmax(0, 1fr) minmax(0, 1.15fr);
      grid-template-areas:
        "title answer"
        "rate actions";
      column-gap:18px;
      row-gap:8px;
      align-items:start;
    }
    body.single-exam-presenting .result-dialog-title,
    .result-modal.is-word-question-result .result-dialog-title {
      grid-area:title;
      font-size:26px;
      margin:0;
      align-self:center;
    }
    body.single-exam-presenting .result-dialog-row,
    .result-modal.is-word-question-result .result-dialog-row {
      grid-area:answer;
      font-size:24px;
      margin:0;
      gap:7px;
      justify-content:flex-start;
      align-self:center;
      flex-wrap:nowrap;
    }
    body.single-exam-presenting .result-correct-badge,
    .result-modal.is-word-question-result .result-correct-badge { min-width:60px; height:46px; padding:0 14px; border-radius:10px; }
    body.single-exam-presenting .result-rate-line,
    .result-modal.is-word-question-result .result-rate-line {
      grid-area:rate;
      font-size:23px;
      margin:0;
      align-self:center;
      white-space:nowrap;
    }
    body.single-exam-presenting .result-dialog-actions,
    .result-modal.is-word-question-result .result-dialog-actions {
      grid-area:actions;
      gap:8px;
      justify-content:flex-start;
      align-items:center;
      flex-wrap:wrap;
      white-space:nowrap;
    }
    body.single-exam-presenting.single-exam-fullscreen-fallback .result-dialog {
      left:20px;
      top:8px;
      width:min(760px, calc(100vw - 40px));
    }
    body.single-exam-presenting .result-dialog-actions .nav-btn,
    .result-modal.is-word-question-result .result-dialog-actions .nav-btn { min-height:40px; padding:7px 14px; font-size:18px; border-radius:11px; }
    @media (max-width:700px) {
      body.single-exam-presenting .result-dialog,
      .result-modal.is-word-question-result .result-dialog {
        left:12px; width:calc(100vw - 24px); max-height:calc(100dvh - 24px); overflow:auto;
        grid-template-columns:minmax(0, 1fr);
        grid-template-areas:"title" "answer" "rate" "actions";
      }
      body.single-exam-presenting .result-dialog-actions,
      .result-modal.is-word-question-result .result-dialog-actions { flex-wrap:wrap; }
    }
</style>
<style id="regular-test-feature-style">
  .regular-test-start-btn {
    min-height:30px; padding:0 11px; border-radius:9px; border:1px solid #f59e0b;
    background:#fff7ed; color:#b45309; font-weight:900; cursor:pointer; white-space:nowrap;
  }
  .regular-test-start-btn:hover:not(:disabled) { background:#ffedd5; border-color:#ea580c; }
  .regular-test-start-btn:disabled { opacity:.55; cursor:not-allowed; }
  body.desktop-fixed-right .regular-test-start-btn { min-height:28px; padding:0 8px; border-radius:8px; font-size:11px; }
  .regular-test-modal[hidden] { display:none !important; }
  .regular-test-modal { position:fixed; inset:0; z-index:6100; }
  .regular-test-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.48); backdrop-filter:blur(2px); }
  .regular-test-dialog {
    position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
    width:min(920px, calc(100vw - 28px)); max-height:calc(100vh - 28px); overflow:auto;
    background:#f8fbff; border:1px solid #bfdbfe; border-radius:22px;
    box-shadow:0 28px 80px rgba(15,23,42,.32);
  }
  .regular-test-head {
    position:sticky; top:0; z-index:2; display:flex; align-items:center; justify-content:space-between; gap:14px;
    padding:16px 18px; background:linear-gradient(180deg,#eff6ff,#fff); border-bottom:1px solid #dbeafe;
  }
  .regular-test-head h3 { margin:0; font-size:24px; color:#0f172a; }
  .regular-test-head p { margin:4px 0 0; color:#64748b; font-size:14px; }
  .regular-test-body { padding:16px; display:grid; gap:14px; }
  .regular-test-step {
    border:1px solid #dbe4f0; border-radius:17px; background:#fff; padding:15px;
    display:grid; gap:11px;
  }
  .regular-test-step[hidden] { display:none !important; }
  .regular-test-step-title { margin:0; color:#2563eb; font-size:18px; font-weight:900; }
  .regular-test-bank-row { display:grid; grid-template-columns:minmax(260px,1fr) auto; gap:12px; align-items:end; }
  .regular-test-bank-row label { display:grid; gap:6px; font-weight:800; color:#0f172a; }
  .regular-test-bank-row select {
    width:100%; border:1px solid #cbd5e1; border-radius:12px; padding:10px 12px; font:inherit; background:#fff;
  }
  .regular-test-status { min-height:24px; color:#64748b; font-weight:700; line-height:1.45; }
  .regular-test-status.ok { color:#15803d; }
  .regular-test-status.err { color:#b91c1c; }
  .regular-test-top-status {
    border:1px solid #fecaca; border-radius:14px; background:#fff1f2;
    color:#b91c1c; font-weight:900; font-size:20px; line-height:1.45;
    padding:14px 16px;
  }
  .regular-test-top-status[hidden] { display:none !important; }
  .regular-choice-modal[hidden] { display:none !important; }
  .regular-choice-modal { position:fixed; inset:0; z-index:6220; }
  .regular-choice-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.48); backdrop-filter:blur(2px); }
  .regular-choice-dialog {
    position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
    width:min(560px, calc(100vw - 28px)); background:#fff; border:1px solid #bfdbfe;
    border-radius:20px; box-shadow:0 24px 70px rgba(15,23,42,.32); overflow:hidden;
  }
  .regular-choice-head {
    display:flex; align-items:center; justify-content:space-between; gap:12px;
    padding:14px 16px; background:linear-gradient(180deg,#eff6ff,#fff); border-bottom:1px solid #dbeafe;
  }
  .regular-choice-head h3 { margin:0; font-size:23px; color:#0f172a; }
  .regular-choice-head p { margin:4px 0 0; color:#64748b; font-size:14px; }
  .regular-choice-body { padding:16px; display:grid; gap:12px; }
  .regular-choice-actions { display:grid; grid-template-columns:1fr 1fr; gap:12px; align-items:start; }
  .regular-choice-actions .nav-btn { min-height:46px; justify-content:center; font-size:16px; font-weight:900; }
  .document-presentation-choice-dialog { width:min(900px, calc(100vw - 28px)); }
  .document-presentation-choice-actions { grid-template-columns:repeat(3, minmax(0, 1fr)); }
  .document-presentation-choice-actions .nav-btn {
    min-height:78px;
    padding:14px 18px;
    white-space:normal;
    line-height:1.35;
  }
  @media (max-width:820px) {
    .document-presentation-choice-actions { grid-template-columns:1fr; }
  }
  .regular-choice-local-wrap { display:grid; gap:8px; min-width:0; }
  .regular-choice-local-wrap .nav-btn { width:100%; }
  .regular-choice-sample-btn { min-height:40px !important; font-size:14px !important; font-weight:800 !important; }
  .regular-sample-modal[hidden] { display:none !important; }
  .regular-sample-modal { position:fixed; inset:0; z-index:6230; }
  .regular-sample-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.48); backdrop-filter:blur(2px); }
  .regular-sample-dialog {
    position:absolute;
    inset:16px 20px;
    width:auto;
    height:auto;
    max-width:none;
    max-height:none;
    margin:0;
    background:#fff;
    border-radius:22px;
    border:1px solid #cbd5e1;
    box-shadow:0 28px 80px rgba(15,23,42,.32);
    overflow:hidden;
    display:flex;
    flex-direction:column;
  }
  .regular-sample-head {
    flex:0 0 auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:18px 24px 14px;
    border-bottom:1px solid #e2e8f0;
  }
  .regular-sample-head h3 { margin:0; font-size:clamp(20px,1.55vw,25px); font-weight:900; color:#0f172a; }
  .regular-sample-body {
    flex:1 1 auto;
    min-height:0;
    padding:20px 26px 18px;
    overflow:auto;
    display:grid;
    grid-template-rows:auto minmax(max-content,1fr) auto;
    gap:12px;
  }
  .regular-sample-title {
    margin:0;
    text-align:center;
    font-size:clamp(25px,2.15vw,34px);
    font-weight:900;
    line-height:1.25;
    color:#0f172a;
  }
  .regular-sample-table {
    width:100%;
    height:100%;
    min-height:0;
    border-collapse:collapse;
    table-layout:fixed;
    background:#fff;
  }
  .regular-sample-table th,
  .regular-sample-table td { border:1px solid #1f2937; vertical-align:top; padding:14px 16px; }
  .regular-sample-table th {
    padding:0;
    font-size:clamp(18px,1.5vw,24px);
    font-style:normal;
    font-weight:500;
    text-align:center;
    color:#111827;
    line-height:1.2;
    text-transform:none;
  }
  .regular-sample-table td { font-size:clamp(20px,1.62vw,28px); line-height:1.28; color:#111827; }
  .regular-sample-column-title { display:block; padding:9px 10px 3px; font-size:clamp(21px,1.78vw,29px); font-weight:900; line-height:1.15; }
  .regular-sample-instruction { display:block; min-height:82px; padding:5px 12px 9px; font-size:clamp(18px,1.48vw,24px); font-style:italic; font-weight:400; line-height:1.32; }
  .regular-sample-blue { color:#0284c7; }
  .regular-sample-blue-underline { color:#0284c7; text-decoration:underline; text-decoration-thickness:2px; text-underline-offset:3px; }
  .regular-sample-question { margin:0 0 4px; }
  .regular-sample-answer { display:block; }
  .regular-sample-answer.correct-red { color:#dc2626; font-weight:500; }
  .regular-sample-answer.correct-line-red { color:#dc2626; font-weight:500; }
  .regular-sample-answer.correct-underline { text-decoration:underline; text-decoration-thickness:2px; text-underline-offset:3px; }
  .regular-sample-letter-red { color:#dc2626; font-weight:500; }
  .regular-sample-letter-underline { text-decoration:underline; text-decoration-thickness:2px; text-underline-offset:3px; }
  .regular-sample-answer-note { font-weight:400; }
  .regular-sample-or { display:block; margin:2px 0; font-style:italic; }
  .regular-sample-table .regular-sample-tf-table-cell {
    min-width:0;
    padding:8px 12px;
    overflow:hidden;
  }
  .regular-sample-tf-answer-table {
    /* Quy tắc table toàn trang đặt min-width:620px. Bảng Đ/S là bảng lồng
       nên phải hủy giới hạn này để luôn nằm trọn trong cột của nó. */
    width:100%;
    min-width:0 !important;
    max-width:100%;
    margin-top:4px;
    border-collapse:collapse;
    table-layout:fixed;
    box-sizing:border-box;
    background:#fff;
    font-size:.82em;
    line-height:1.12;
  }
  .regular-sample-table .regular-sample-tf-answer-table th,
  .regular-sample-table .regular-sample-tf-answer-table td {
    position:static;
    top:auto;
    z-index:auto;
    min-width:0;
    border:1px solid #111827;
    padding:2px 5px;
    vertical-align:middle;
    font-size:inherit;
    line-height:1.12;
    color:#111827;
    background:#fff;
    letter-spacing:normal;
    text-transform:none;
    overflow-wrap:anywhere;
    word-break:normal;
  }
  .regular-sample-table .regular-sample-tf-answer-table th {
    font-weight:900;
    text-align:center;
  }
  .regular-sample-table .regular-sample-tf-answer-table th:first-child,
  .regular-sample-table .regular-sample-tf-answer-table td:first-child {
    width:66%;
  }
  .regular-sample-table .regular-sample-tf-answer-table th:last-child,
  .regular-sample-table .regular-sample-tf-answer-table td:last-child {
    width:34%;
    text-align:center;
    white-space:normal;
  }
  .regular-sample-footnote { margin:0; text-align:center; font-size:clamp(20px,1.6vw,26px); line-height:1.35; color:#111827; }
  .regular-sample-footnote strong { font-weight:900; }
  @media (max-width:640px) {
    .regular-sample-dialog { inset:8px; border-radius:16px; }
    .regular-sample-head { padding:12px 12px 9px; }
    .regular-sample-head h3 { font-size:17px; }
    .regular-sample-body { padding:10px; display:block; }
    .regular-sample-title { margin-bottom:10px; font-size:20px; }
    .regular-sample-table { height:auto; min-width:720px; }
    .regular-sample-table th { font-size:15px; }
    .regular-sample-table td { font-size:19px; }
    .regular-sample-column-title { font-size:17px; }
    .regular-sample-instruction { min-height:64px; font-size:15px; }
    .regular-sample-footnote { margin-top:8px; font-size:18px; }
    .regular-sample-note-row td { font-size:18px; padding:0 10px 4px; }
  }
  .regular-choice-status { min-height:22px; color:#64748b; font-weight:800; line-height:1.45; }
  .regular-choice-status.err { color:#b91c1c; }
  .regular-choice-status.ok { color:#15803d; }
  .regular-test-actions { display:flex; gap:10px; flex-wrap:wrap; align-items:center; }
  .regular-test-note { color:#64748b; line-height:1.5; font-size:14px; }
  .regular-test-summary {
    border:1px dashed #93c5fd; border-radius:12px; padding:10px 12px; background:#eff6ff;
    color:#1e3a8a; font-weight:800;
  }
  .regular-nobank-modal[hidden] { display:none !important; }
  .regular-nobank-modal { position:fixed; inset:0; z-index:6300; }
  .regular-nobank-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.48); backdrop-filter:blur(2px); }
  .regular-nobank-dialog {
    position:absolute; left:50%; top:50%; transform:translate(-50%,-50%);
    width:min(780px, calc(100vw - 28px)); background:#fff; border:1px solid #fecaca;
    border-radius:18px; box-shadow:0 24px 70px rgba(15,23,42,.32); padding:16px;
  }
  .regular-nobank-message {
    border:1px solid #fecaca; border-radius:14px; background:#fff1f2;
    color:#b91c1c; font-weight:900; font-size:22px; line-height:1.45;
    padding:16px 18px;
  }
  .regular-nobank-actions { display:flex; justify-content:flex-end; margin-top:14px; }
  @media (max-width:700px) {
    .regular-test-bank-row { grid-template-columns:1fr; }
    .regular-test-dialog { width:calc(100vw - 12px); max-height:calc(100vh - 12px); }
    .regular-test-head { padding:12px; }
    .regular-test-body { padding:10px; }
  }
</style>
<style id="regular-test-question-editor-style">
  .regular-question-modal[hidden] { display:none !important; }
  .regular-question-modal {
    position:fixed; inset:0; z-index:6250; background:#f8fbff;
  }
  .regular-question-editor {
    position:absolute; inset:0; display:flex; flex-direction:column;
    background:#f8fbff; color:#0f172a;
  }
  .regular-question-toolbar {
    flex:0 0 auto; min-height:58px; display:grid; grid-template-columns:minmax(180px, 250px) minmax(240px, 1fr) auto;
    align-items:center; gap:10px; padding:8px 12px; background:#fff; border-bottom:1px solid #cbd5e1;
    box-shadow:0 2px 10px rgba(15,23,42,.08); z-index:3;
  }
  .regular-question-title {
    min-height:38px; display:flex; align-items:center; padding:0 4px;
    color:#0f3f78; font-size:22px; font-weight:900;
  }
  .regular-question-total {
    min-height:38px; display:flex; align-items:center; justify-content:flex-end; padding:0 4px;
    color:#0f172a; font-size:18px; font-weight:900; text-align:right; white-space:nowrap;
  }
  .regular-question-table-wrap {
    flex:1 1 auto; min-height:0; overflow:auto; padding:0 10px 10px;
  }
  .regular-question-table {
    width:100%; min-width:1380px; border-collapse:separate; border-spacing:0;
    table-layout:fixed; background:#fff; font-family:"Times New Roman", Times, serif;
    font-size:15px;
  }
  .regular-question-table col.rq-col-tt { width:54px; }
  .regular-question-table col.rq-col-chapter { width:145px; }
  .regular-question-table col.rq-col-unit { width:425px; }
  .regular-question-table col.rq-col-count { width:90px; }
  .regular-question-table th,
  .regular-question-table td {
    border-right:1px solid #cbd5e1; border-bottom:1px solid #cbd5e1;
    padding:8px 8px; vertical-align:top; background:#fff;
  }
  .regular-question-table th:first-child,
  .regular-question-table td:first-child { border-left:1px solid #cbd5e1; }
  .regular-question-table thead { position:sticky; top:0; z-index:2; }
  .regular-question-table thead th {
    position:static; text-align:center; color:#0f3f78;
    background:#eef5ff; font-weight:900; vertical-align:middle;
  }
  .regular-question-table thead tr:first-child th { border-top:1px solid #cbd5e1; }
  .regular-question-table td.rq-center { text-align:center; vertical-align:middle; }
  .regular-question-table td.rq-chapter,
  .regular-question-table td.rq-unit { color:#0f3f78; font-weight:800; }
  .regular-question-table td.rq-requirement { color:#16478a; font-weight:700; line-height:1.35; }
  .regular-question-table td.rq-unit { vertical-align:middle; }
  .regular-question-table td.rq-chapter { vertical-align:middle; text-align:center; }
  .regular-question-table .rq-type-start { border-left:2px solid #93c5fd; }
  .regular-question-input {
    width:72px; max-width:100%; min-width:72px; box-sizing:border-box; border:1px solid #bfcee3;
    border-radius:10px; padding:6px 9px; font:700 15px/1.2 Arial,sans-serif;
    background:#fff; color:#0f172a; text-align:center;
  }
  .regular-question-input:disabled {
    background:#f6f8fb;
    color:#c5ced8 !important;
    -webkit-text-fill-color:#c5ced8;
    border-color:#e2e8f0;
    box-shadow:none;
    opacity:1;
    font-weight:700;
  }

  /* Dùng câu hỏi của MVIP - Soạn câu hỏi:
     ô nào đã chọn số câu > 0 thì chuyển nền vàng để dễ kiểm soát. */
  .regular-question-table td.regular-question-selected-cell {
    background:#fff4a8 !important;
  }
  .regular-question-input.regular-question-selected-count:not(:disabled) {
    background:#ffe66a !important;
    border-color:#eab308 !important;
    box-shadow:0 0 0 1px rgba(234,179,8,.16) inset;
    color:#7c2d12 !important;
    -webkit-text-fill-color:#7c2d12;
    font-weight:1000 !important;
  }
  .regular-question-actions .nav-btn { min-width:70px; }
  @media (max-width:760px) {
    .regular-question-toolbar { min-height:52px; padding:6px 8px; grid-template-columns:1fr; }
    .regular-question-title { font-size:19px; }
    .regular-question-total { font-size:16px; }
    .regular-question-actions { justify-content:flex-end; }
    .regular-question-table-wrap { padding:0 4px 6px; }
  }

  /* ================= MVIP SUBSCRIPTION / SEPAY ================= */
  .limited-tier-pay-btn {
    margin:0; width:100%; height:100%; min-height:inherit; padding:18px 16px; border:0; border-radius:18px;
    background:#0f6fdc; color:#fff; font-size:clamp(18px, 2.2vw, 28px); line-height:1.45; font-weight:900;
    cursor:pointer; box-shadow:0 10px 24px rgba(15,111,220,.28); display:flex; align-items:center;
    justify-content:center; text-align:center; white-space:normal; overflow-wrap:anywhere;
  }
  .limited-tier-pay-btn:hover:not(:disabled) { background:#0b5fbd; }
  .limited-tier-pay-btn:disabled { opacity:.6; cursor:not-allowed; box-shadow:none; }
  .limited-main-upgrade-slot { display:none; margin-top:12px; min-height:92px; }
  .limited-main-upgrade-slot:not([hidden]) { display:flex; }
  .limited-main-upgrade-btn {
    width:100%; min-height:92px; padding:18px 20px; border:0; border-radius:18px;
    background:linear-gradient(135deg,#0f6fdc,#2563eb); color:#fff; font-size:clamp(20px,2vw,28px);
    line-height:1.25; font-weight:1000; cursor:pointer; box-shadow:0 12px 28px rgba(37,99,235,.28);
    display:flex; align-items:center; justify-content:center; text-align:center;
  }
  .limited-main-upgrade-btn:hover:not(:disabled) { background:linear-gradient(135deg,#0b5fbd,#1d4ed8); transform:translateY(-1px); }
  .limited-main-upgrade-btn:disabled { opacity:.6; cursor:not-allowed; transform:none; box-shadow:none; }
  body.exam-mode-expanded .limited-main-upgrade-slot { display:none !important; }
  body.desktop-fixed-right .student-board-shell { flex:1 1 auto; min-height:0; overflow:hidden; display:flex; flex-direction:column; }
  body.desktop-fixed-right .student-board-shell .student-board { flex:1 1 auto; min-height:0; }
  body.desktop-fixed-right .limited-main-upgrade-slot { flex:0 0 118px; min-height:118px; margin-top:8px; padding:0 4px 4px; }
  body.desktop-fixed-right .limited-main-upgrade-btn { min-height:110px; height:100%; border-radius:14px; font-size:23px; }
  .subscription-modal[hidden] { display:none !important; }
  .subscription-modal {
    position:fixed; inset:0; z-index:100500; display:flex; align-items:stretch; justify-content:stretch; padding:0;
  }
  .subscription-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.72); backdrop-filter:blur(3px); }
  .subscription-dialog {
    position:relative; z-index:1; width:100vw; height:100vh; max-width:none; max-height:none; overflow:hidden;
    display:flex; flex-direction:column; background:#fff; color:#0f172a; border-radius:0; border:0;
    box-shadow:none;
  }
  .subscription-head {
    flex:0 0 auto; display:flex; align-items:flex-start; justify-content:space-between; gap:16px;
    padding:12px 18px; border-bottom:1px solid #e2e8f0; background:#fff;
  }
  .subscription-head h3 { margin:0 0 3px; font-size:24px; line-height:1.2; }
  .subscription-head p { margin:0; color:#64748b; font-weight:700; font-size:14px; line-height:1.35; }
  .subscription-close {
    flex:0 0 auto; min-width:88px; height:42px; padding:0 16px; border-radius:12px; border:1px solid #cbd5e1;
    background:#fff; font-size:18px; font-weight:900; cursor:pointer;
  }
  .subscription-body {
    flex:1 1 auto; min-height:0; overflow:hidden; display:grid;
    grid-template-columns:minmax(320px,.72fr) minmax(560px,1.28fr); gap:14px; padding:14px; background:#f8fafc;
  }
  .subscription-card {
    min-height:0; border:1px solid #dbe4f0; border-radius:18px; padding:14px; background:#f8fbff; overflow:auto;
  }
  .subscription-card:last-child {
    overflow:hidden; display:grid; grid-template-columns:minmax(360px,1.15fr) minmax(280px,.85fr);
    grid-template-rows:minmax(0,1fr) auto; gap:14px;
  }
  .subscription-package-title { margin:0 0 10px; color:#334155; font-size:17px; font-weight:1000; }
  .subscription-package-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; }
  .subscription-package-btn {
    width:100%; min-height:72px; padding:12px 14px; border:2px solid #bfdbfe; border-radius:14px;
    background:#fff; color:#0f172a; text-align:left; font:inherit; font-size:15px; font-weight:900; line-height:1.35;
    cursor:pointer; transition:transform .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease;
  }
  .subscription-package-btn:hover:not(:disabled) {
    transform:translateY(-1px); border-color:#2563eb; background:#eff6ff; box-shadow:0 8px 20px rgba(37,99,235,.12);
  }
  .subscription-package-btn.is-selected { border-color:#16a34a; background:#ecfdf5; color:#166534; }
  .subscription-package-btn:disabled { opacity:.58; cursor:wait; transform:none; box-shadow:none; }
  .subscription-hint { margin-top:12px; color:#64748b; font-size:12.5px; line-height:1.45; }
  .subscription-qr-wrap {
    grid-row:1 / span 2; min-height:0; height:100%; display:flex; justify-content:center; align-items:center;
    background:#fff; border:1px dashed #94a3b8; border-radius:18px; padding:10px; overflow:hidden;
  }
  .subscription-qr-wrap img {
    display:block; width:auto; height:auto; max-width:100%; max-height:calc(100vh - 126px); object-fit:contain;
  }
  .subscription-qr-wrap img[hidden] { display:none !important; }
  .subscription-placeholder { color:#64748b; text-align:center; font-weight:800; padding:24px 12px; }
  .subscription-placeholder.success { color:#15803d; padding:20px 12px; }
  .subscription-success-mark {
    width:78px; height:78px; margin:0 auto 14px; border-radius:999px; display:flex; align-items:center; justify-content:center;
    background:#22c55e; color:#fff; font-size:50px; line-height:1; font-weight:1000; box-shadow:0 14px 30px rgba(34,197,94,.28);
  }
  .subscription-success-title { font-size:30px; line-height:1.2; font-weight:1000; color:#15803d; }
  .subscription-success-subtitle { margin-top:8px; font-size:15px; line-height:1.45; color:#475569; font-weight:800; }
  .subscription-details {
    min-height:0; margin:0; display:grid; align-content:start; gap:8px; font-size:14px; overflow:auto;
    border:1px solid #e2e8f0; border-radius:14px; background:#fff; padding:12px;
  }
  .subscription-detail-row { display:grid; grid-template-columns:112px minmax(0,1fr); gap:8px; align-items:start; }
  .subscription-detail-row span:first-child { color:#64748b; font-weight:800; }
  .subscription-detail-row strong { overflow-wrap:anywhere; }
  .subscription-status {
    align-self:end; margin:0; border-radius:13px; padding:12px 14px; background:#eff6ff;
    color:#1d4ed8; font-weight:900; text-align:center;
  }
  .subscription-status.success { background:#ecfdf5; color:#15803d; }
  .subscription-status.error { background:#fef2f2; color:#b91c1c; }
  .subscription-status.waiting { background:#fff7ed; color:#c2410c; }
  .subscription-copy-btn { border:1px solid #cbd5e1; border-radius:9px; background:#fff; padding:5px 9px; font-weight:800; cursor:pointer; margin-left:6px; }
  @media (max-width:1050px) {
    .subscription-body { grid-template-columns:minmax(280px,.8fr) minmax(420px,1.2fr); }
    .subscription-card:last-child { grid-template-columns:minmax(300px,1fr) minmax(245px,.8fr); }
    .subscription-package-grid { grid-template-columns:1fr; }
    .subscription-package-btn { min-height:58px; }
  }
  @media (max-width:760px) {
    .subscription-dialog { overflow:auto; }
    .subscription-head { position:sticky; top:0; z-index:2; padding:12px; }
    .subscription-head h3 { font-size:20px; }
    .subscription-head p { font-size:12px; }
    .subscription-body { min-height:auto; overflow:visible; grid-template-columns:1fr; padding:10px; }
    .subscription-card { overflow:visible; }
    .subscription-card:last-child { display:grid; grid-template-columns:1fr; grid-template-rows:auto auto auto; overflow:visible; }
    .subscription-qr-wrap { grid-row:auto; min-height:300px; height:auto; }
    .subscription-qr-wrap img { max-height:none; width:min(380px,100%); }
    .subscription-package-grid { grid-template-columns:1fr; }
    .subscription-detail-row { grid-template-columns:105px minmax(0,1fr); }
  }

</style>
<style id="word-presentation-feature-style">
  .word-presentation-start-btn {
    min-height:30px; padding:0 12px; border-radius:9px; border:1px solid #0284c7;
    background:#f0f9ff; color:#0369a1; font-weight:900; cursor:pointer; white-space:nowrap;
    transition:background .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
  }
  .word-presentation-start-btn:hover:not(:disabled) {
    background:#e0f2fe; color:#075985; border-color:#0369a1; transform:translateY(-1px);
  }
  .word-presentation-start-btn:disabled { opacity:.62; cursor:wait; transform:none; }
  .word-presentation-httc-badge {
    display:inline-flex; align-items:center; justify-content:center;
    min-width:36px; min-height:38px; padding:0 10px; box-sizing:border-box;
    border:1px solid #a78bfa; border-radius:11px; background:#faf5ff;
    color:#6d28d9; font-weight:900; font-size:15px; letter-spacing:.02em; white-space:nowrap;
  }
  .word-presentation-httc-badge[hidden] { display:none !important; }
  body.desktop-fixed-right .word-presentation-start-btn {
    min-height:28px; height:28px; padding:0 8px; border-radius:8px; font-size:11px;
  }
  html.word-presentation-open,
  body.word-presentation-open,
  html.word-presentation-source-modal-open { overflow:hidden !important; }

  .cv7991-source-underline {
    text-decoration-line:underline;
    text-decoration-thickness:.065em;
    text-underline-offset:.11em;
    text-decoration-skip-ink:auto;
  }

  .word-presentation-presenter[hidden] { display:none !important; }
  .word-presentation-presenter {
    position:fixed; inset:0; z-index:9200; display:flex; flex-direction:column;
    min-width:0; min-height:0; background:#0f172a; color:#fff;
  }
  .word-presentation-presenter:fullscreen,
  .word-presentation-presenter:-webkit-full-screen,
  .word-presentation-presenter.is-fallback-fullscreen { inset:0; width:100vw; height:100vh; }

  .cv7991-document-link,
  .cv7991-document-link:visited {
    color:#0563c1 !important;
    text-decoration:underline;
    text-underline-offset:.08em;
    cursor:pointer;
  }
  .cv7991-document-link:focus-visible { outline:2px solid #0563c1; outline-offset:3px; }

  /* Chuyển toàn màn hình/thu nhỏ theo một lần bố trí duy nhất. Tắt các hiệu ứng
     phụ trong đúng khoảnh khắc đổi khung để nội dung không co giãn thành hai nấc. */
  body.word-presentation-layout-switching,
  body.word-presentation-layout-switching * {
    scroll-behavior:auto !important;
  }
  body.word-presentation-layout-switching .word-presentation-presenter,
  body.word-presentation-layout-switching .word-presentation-presenter *,
  body.word-presentation-layout-switching #dang-nhap,
  body.word-presentation-layout-switching #bang-dieu-khien .current-board {
    transition:none !important;
    animation:none !important;
  }
  /* Không cho người xem nhìn thấy các trạng thái trung gian khi Chrome đang
     đổi kích thước native fullscreen. Chỉ vùng nội dung được ẩn trong vài khung
     hình; thanh công cụ vẫn giữ nguyên để thao tác không bị mất phản hồi. */
  .word-presentation-presenter.is-layout-switching .word-presentation-fit-layer {
    visibility:hidden !important;
  }

  /* Khi chuẩn bị chuyển giữa toàn màn hình và bố cục thu nhỏ, vẫn giữ presenter
     phủ trọn màn hình cho tới đúng thời điểm trình duyệt hoàn tất chuyển trạng thái. */
  body.word-presentation-scan-split .word-presentation-presenter:fullscreen,
  body.word-presentation-scan-split .word-presentation-presenter:-webkit-full-screen,
  body.word-presentation-scan-split .word-presentation-presenter.is-fallback-fullscreen {
    left:0 !important; top:0 !important; right:0 !important; bottom:0 !important;
    width:100vw !important; height:100vh !important; z-index:9200 !important;
    box-shadow:none !important;
  }

  /* Màn hình thu nhỏ mặc định của Trình chiếu Word dùng đúng bố cục
     “Kiểm tra ngay”: tiêu đề trang ở trên, câu hỏi bên trái và chính bảng
     học sinh/điều khiển realtime hiện có ở bên phải. */
  body.word-presentation-scan-split {
    --panel-w:min(34vw, 430px);
    --word-presentation-dock-top:74px;
    overflow:hidden !important;
  }

  /* Giữ phần hướng dẫn chọn lớp-môn và quét phương án ở đầu cột trái,
     không để thanh điều hướng chiếm thêm chiều cao khi đang trình chiếu. */
  body.word-presentation-scan-split .topbar { display:none !important; }
  body.word-presentation-scan-split #dang-nhap {
    display:block !important;
    position:fixed !important;
    left:0 !important;
    top:0 !important;
    right:var(--panel-w) !important;
    width:auto !important;
    height:var(--word-presentation-dock-top) !important;
    min-height:0 !important;
    margin:0 !important;
    padding:8px 8px 3px !important;
    z-index:840 !important;
    overflow:hidden !important;
    background:linear-gradient(180deg,#eef4ff 0%,#f8fbff 100%) !important;
    border-bottom:1px solid #dbe4f0 !important;
  }
  body.word-presentation-scan-split #dang-nhap > .container {
    width:100% !important;
    max-width:none !important;
    height:100% !important;
    margin:0 !important;
    padding:0 !important;
  }
  body.word-presentation-scan-split #dang-nhap .section-head {
    display:block !important;
    margin:0 !important;
    padding:0 !important;
    overflow:hidden !important;
  }
  body.word-presentation-scan-split #dang-nhap .section-head .eyebrow,
  body.word-presentation-scan-split #dang-nhap #accountDataNote,
  body.word-presentation-scan-split #dang-nhap .auth-shell {
    display:none !important;
  }
  body.word-presentation-scan-split #dang-nhap .section-head h2 {
    margin:0 0 4px !important;
    color:#0f172a !important;
    font-size:28px !important;
    line-height:1.08 !important;
    font-weight:900 !important;
    white-space:nowrap !important;
    overflow:hidden !important;
    text-overflow:ellipsis !important;
  }
  body.word-presentation-scan-split #dang-nhap .section-head p {
    display:block !important;
    margin:0 !important;
    color:#64748b !important;
    font-size:14px !important;
    line-height:1.2 !important;
    white-space:nowrap !important;
    overflow:hidden !important;
    text-overflow:ellipsis !important;
  }

  body.word-presentation-scan-split .word-presentation-presenter {
    left:0 !important;
    top:var(--word-presentation-dock-top) !important;
    right:var(--panel-w) !important;
    bottom:0 !important;
    width:auto !important;
    height:auto !important;
    z-index:850 !important;
    box-shadow:0 20px 52px rgba(15,23,42,.28) !important;
  }

  body.word-presentation-scan-split .word-presentation-toolbar {
    min-height:48px !important;
    padding:5px 7px !important;
    gap:6px !important;
    flex-wrap:nowrap !important;
  }
  body.word-presentation-scan-split .word-presentation-title {
    display:flex !important;
    flex:0 0 auto !important;
    min-width:52px !important;
    max-width:84px !important;
  }
  body.word-presentation-scan-split .word-presentation-title strong { display:none !important; }
  body.word-presentation-scan-split .word-presentation-title span {
    color:#64748b !important;
    font-size:11px !important;
    line-height:1.15 !important;
    font-weight:900 !important;
    white-space:nowrap !important;
  }
  body.word-presentation-scan-split .word-presentation-actions {
    flex:1 1 auto !important;
    width:auto !important;
    min-width:0 !important;
    justify-content:flex-end !important;
    gap:6px !important;
    overflow-x:auto !important;
    overflow-y:hidden !important;
    padding:1px 0 2px !important;
    scrollbar-width:thin;
  }
  body.word-presentation-scan-split .word-presentation-toolbar button {
    min-height:32px !important;
    height:32px !important;
    padding:0 9px !important;
    border-radius:9px !important;
    font-size:12px !important;
    white-space:nowrap !important;
  }

  /* Ở bố cục thu nhỏ vẫn hiện ô Chọn lớp - môn trên thanh trình chiếu;
     trạng thái quét tiếp tục dùng bảng realtime bên phải để tiết kiệm chỗ. */
  body.word-presentation-scan-split .word-presentation-scan-tools {
    display:contents !important;
  }
  body.word-presentation-scan-split .word-presentation-class-select {
    display:block !important;
    width:clamp(102px, 10.5vw, 118px) !important;
    max-width:118px !important;
    height:32px !important;
    padding-left:6px !important;
    padding-right:20px !important;
    flex:0 0 auto !important;
    -webkit-appearance:menulist !important;
    appearance:auto !important;
  }
  body.word-presentation-scan-split .word-presentation-scan-status,
  body.word-presentation-scan-split .word-presentation-type {
    display:none !important;
  }
  body.word-presentation-scan-split .word-presentation-result-btn { order:90; }
  body.word-presentation-scan-split .word-presentation-close-btn { order:100; }
  body.word-presentation-scan-split .word-presentation-jump {
    min-height:32px !important;
    padding-left:7px !important;
    flex:0 0 auto !important;
  }
  body.word-presentation-scan-split .word-presentation-jump input {
    width:48px !important;
    height:28px !important;
    font-size:12px !important;
  }
  body.word-presentation-scan-split .word-presentation-jump-view-btn {
    min-height:28px !important;
    height:28px !important;
  }

  /* Bảng bên phải là nguyên bảng realtime sẵn có của trang. */
  body.word-presentation-scan-split #bang-dieu-khien.hidden-red-area {
    display:block !important;
    padding:0 !important;
    margin:0 !important;
    min-height:0 !important;
  }
  body.word-presentation-scan-split #bang-dieu-khien.hidden-red-area > .container {
    width:0 !important;
    margin:0 !important;
    padding:0 !important;
    overflow:visible !important;
  }
  body.word-presentation-scan-split #bang-dieu-khien .section-head,
  body.word-presentation-scan-split #bang-dieu-khien .history-board,
  body.word-presentation-scan-split #bang-dieu-khien #historyEmpty {
    display:none !important;
  }
  body.word-presentation-scan-split #bang-dieu-khien .dashboard-shell,
  body.word-presentation-scan-split #bang-dieu-khien .workspace {
    display:block !important;
    margin:0 !important;
    padding:0 !important;
  }

  @media (max-width:1099px) and (min-width:761px) {
    body.word-presentation-scan-split { --panel-w:clamp(330px,38vw,400px); }
  }
  @media (max-width:760px) {
    body.word-presentation-scan-split {
      --word-presentation-scan-panel-height:44vh;
      --word-presentation-dock-top:0px;
    }
    body.word-presentation-scan-split #dang-nhap { display:none !important; }
    body.word-presentation-scan-split .word-presentation-presenter {
      left:0 !important;
      top:0 !important;
      right:0 !important;
      bottom:var(--word-presentation-scan-panel-height) !important;
      width:100vw !important;
      height:auto !important;
      z-index:1450 !important;
    }
    body.word-presentation-scan-split #bang-dieu-khien .current-board {
      position:fixed !important;
      left:0 !important;
      top:auto !important;
      right:0 !important;
      bottom:0 !important;
      width:100vw !important;
      height:var(--word-presentation-scan-panel-height) !important;
      z-index:1500 !important;
      display:flex !important;
      flex-direction:column !important;
      min-width:0 !important;
      min-height:0 !important;
      overflow:hidden !important;
      border-radius:0 !important;
      border-left:0 !important;
      border-top:1px solid #cbd5e1 !important;
      box-shadow:0 -10px 24px rgba(15,23,42,.16) !important;
    }
    body.word-presentation-scan-split .word-presentation-title { display:none !important; }
  }

  .word-presentation-toolbar {
    flex:0 0 auto; min-height:54px; box-sizing:border-box;
    display:flex; align-items:center; justify-content:space-between; gap:12px;
    padding:7px 12px; background:#fff; color:#0f172a; border-bottom:1px solid #cbd5e1;
    box-shadow:0 4px 18px rgba(15,23,42,.14);
  }
  .word-presentation-title { min-width:0; display:flex; flex-direction:column; gap:1px; }
  .word-presentation-title strong {
    max-width:min(52vw, 760px); overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
    font-size:15px; line-height:1.2;
  }
  .word-presentation-title span { color:#64748b; font-size:12px; font-weight:800; }
  .word-presentation-actions { display:flex; align-items:center; justify-content:flex-end; gap:7px; flex-wrap:nowrap; }

  .word-presentation-access-banner[hidden] { display:none !important; }
  .word-presentation-access-banner {
    flex:0 0 auto; min-height:48px; box-sizing:border-box;
    display:flex; align-items:stretch; gap:8px; padding:5px 8px;
    background:#fff; color:#0f172a; border-bottom:1px solid #cbd5e1;
  }
  .word-presentation-access-message {
    flex:1 1 auto; min-width:0; min-height:38px; padding:7px 13px;
    display:flex; align-items:center; justify-content:flex-start;
    border:1px solid #bfdbfe; border-radius:10px; background:#eff6ff; color:#1e3a8a;
    font-family:Arial, Helvetica, sans-serif; font-size:28px; line-height:1.28; font-weight:800;
    overflow-wrap:anywhere;
  }
  .word-presentation-access-banner.is-guest .word-presentation-access-message {
    color:#dc2626;
  }
  .word-presentation-access-action {
    flex:0 0 auto; min-width:128px; min-height:38px; padding:0 16px;
    border:1px solid #2563eb; border-radius:10px; background:#2563eb; color:#fff;
    font-family:Arial, Helvetica, sans-serif; font-size:14px; line-height:1; font-weight:900;
    cursor:pointer; white-space:nowrap;
  }
  .word-presentation-access-action:hover { background:#1d4ed8; border-color:#1d4ed8; }
  .word-presentation-access-banner.is-limited {
    display:grid;
    grid-template-columns:minmax(0, 1fr) clamp(240px, 27vw, 360px);
  }
  .word-presentation-access-banner.is-limited .word-presentation-access-message {
    min-width:0; border-color:#fed7aa; background:#fff7ed; color:#9a3412;
  }
  .word-presentation-access-banner.is-limited .word-presentation-access-action {
    width:100%; min-width:0; padding:0 22px;
    border-color:#2563eb; background:#2563eb; font-size:28px;
  }
  .word-presentation-access-banner.is-limited .word-presentation-access-action:hover {
    border-color:#1d4ed8; background:#1d4ed8;
  }
  body.word-presentation-scan-split .word-presentation-access-banner {
    min-height:44px; gap:6px; padding:4px 7px;
  }
  body.word-presentation-scan-split .word-presentation-access-message {
    min-height:36px; padding:6px 10px; font-size:26px;
  }
  body.word-presentation-scan-split .word-presentation-access-action {
    min-height:36px; padding:0 13px; font-size:13px;
  }
  body.word-presentation-scan-split .word-presentation-access-banner.is-limited {
    grid-template-columns:minmax(0, 1fr) clamp(230px, 28vw, 350px);
  }
  body.word-presentation-scan-split .word-presentation-access-banner.is-limited .word-presentation-access-action {
    width:100%; min-width:0; padding:0 18px; font-size:26px;
  }
  @media (max-width:700px) {
    .word-presentation-access-banner { gap:5px; padding:4px 5px; }
    .word-presentation-access-message { padding:6px 8px; font-size:24px; }
    .word-presentation-access-action { min-width:104px; padding:0 9px; font-size:12px; }
    .word-presentation-access-banner.is-limited {
      grid-template-columns:minmax(0, 1fr) minmax(180px, 34vw);
    }
    .word-presentation-access-banner.is-limited .word-presentation-access-action,
    body.word-presentation-scan-split .word-presentation-access-banner.is-limited .word-presentation-access-action {
      min-width:0; padding:0 10px; font-size:24px;
    }
  }

  .word-presentation-type { display:none !important; }
  .word-presentation-toolbar button {
    min-height:34px; padding:0 12px; border-radius:10px; border:1px solid #cbd5e1;
    background:#fff; color:#0f172a; font-weight:900; cursor:pointer; white-space:nowrap;
  }
  .word-presentation-toolbar button:hover:not(:disabled) { background:#f8fafc; border-color:#94a3b8; }
  .word-presentation-toolbar button:disabled { opacity:.38; cursor:not-allowed; }
  .word-presentation-fullscreen-btn { border-color:#2563eb !important; color:#1d4ed8 !important; }
  .word-presentation-nav-btn { min-width:42px; padding:0 10px !important; font-size:21px; line-height:1; }
  .word-presentation-zoom-btn {
    display:none; min-width:38px; padding:0 9px !important;
    border-color:#0f766e !important; color:#0f766e !important;
    font-family:Arial, Helvetica, sans-serif; font-size:23px; line-height:1;
  }
  .word-presentation-presenter.is-ordinary-document:not(.is-powerpoint-slide-mode)
    .word-presentation-zoom-btn {
    display:inline-flex; align-items:center; justify-content:center;
  }
  .word-presentation-presenter.is-ordinary-document:not(.is-powerpoint-slide-mode)
    .word-presentation-zoom-btn:hover:not(:disabled) {
    background:#f0fdfa !important; border-color:#0f766e !important;
  }
  .word-presentation-close-btn { min-width:42px; padding:0 10px !important; border-color:#ef4444 !important; color:#b91c1c !important; }
  .word-presentation-all-btn { border-color:#0f766e !important; color:#0f766e !important; }
  .word-presentation-all-btn.is-active { background:#0f766e !important; border-color:#0f766e !important; color:#fff !important; }
  .word-presentation-answer-btn { border-color:#dc2626 !important; color:#b91c1c !important; }
  .word-presentation-answer-btn:hover:not(:disabled) { background:#fff5f5 !important; border-color:#dc2626 !important; }
  .word-presentation-answer-btn.is-active { background:#b91c1c !important; border-color:#b91c1c !important; color:#fff !important; }
  .word-presentation-answer-btn.is-active:hover:not(:disabled) { background:#991b1b !important; border-color:#991b1b !important; }

  .word-presentation-scan-tools[hidden] { display:none !important; }
  .word-presentation-scan-tools {
    min-height:34px; display:flex; align-items:center; gap:6px; flex:0 0 auto;
  }
  .word-presentation-presenter:fullscreen.wp-scan-authorized .word-presentation-scan-tools,
  .word-presentation-presenter:-webkit-full-screen.wp-scan-authorized .word-presentation-scan-tools,
  .word-presentation-presenter.is-fallback-fullscreen.wp-scan-authorized .word-presentation-scan-tools {
    display:contents !important;
  }
  .word-presentation-presenter:fullscreen.wp-scan-authorized .word-presentation-result-btn,
  .word-presentation-presenter:-webkit-full-screen.wp-scan-authorized .word-presentation-result-btn,
  .word-presentation-presenter.is-fallback-fullscreen.wp-scan-authorized .word-presentation-result-btn {
    order:90;
  }
  .word-presentation-presenter:fullscreen.wp-scan-authorized .word-presentation-close-btn,
  .word-presentation-presenter:-webkit-full-screen.wp-scan-authorized .word-presentation-close-btn,
  .word-presentation-presenter.is-fallback-fullscreen.wp-scan-authorized .word-presentation-close-btn {
    order:100;
  }
  .word-presentation-class-select {
    display:none !important;
    width:clamp(108px, 10vw, 132px); max-width:132px; height:34px; box-sizing:border-box;
    border:1px solid #0f766e; border-radius:9px; padding:0 22px 0 7px;
    background:#f0fdfa; color:#134e4a; font-size:12px; font-weight:900; outline:none;
    cursor:pointer;
  }
  .word-presentation-class-select:focus { border-color:#0d9488; box-shadow:0 0 0 3px rgba(13,148,136,.16); }
  .word-presentation-countdown-input {
    width:112px; height:34px; box-sizing:border-box; padding:0 26px 0 8px; flex:0 0 auto;
    border:1px solid #2563eb; border-radius:9px; background:#fff; color:#0f172a;
    font-size:15px; font-weight:900; line-height:1; text-align:center; font-variant-numeric:tabular-nums;
    outline:none; cursor:pointer; -webkit-appearance:menulist; appearance:auto;
    transition:background .16s ease, color .16s ease, border-color .16s ease, box-shadow .16s ease;
  }
  .word-presentation-countdown-input option { background:#fff; color:#0f172a; font-weight:800; }
  .word-presentation-countdown-input:hover { border-color:#1d4ed8; }
  .word-presentation-countdown-input:focus { border-color:#1d4ed8; box-shadow:0 0 0 3px rgba(37,99,235,.16); }
  .word-presentation-countdown-input.is-running { background:#eff6ff; color:#1d4ed8; cursor:pointer; opacity:1; }
  .word-presentation-presenter.wp-scan-authorized .word-presentation-class-select,
  .word-presentation-presenter:fullscreen.wp-scan-authorized .word-presentation-class-select,
  .word-presentation-presenter:-webkit-full-screen.wp-scan-authorized .word-presentation-class-select,
  .word-presentation-presenter.is-fallback-fullscreen.wp-scan-authorized .word-presentation-class-select,
  body.word-presentation-scan-split .word-presentation-presenter:fullscreen.wp-scan-authorized .word-presentation-class-select,
  body.word-presentation-scan-split .word-presentation-presenter:-webkit-full-screen.wp-scan-authorized .word-presentation-class-select,
  body.word-presentation-scan-split .word-presentation-presenter.is-fallback-fullscreen.wp-scan-authorized .word-presentation-class-select {
    display:block !important;
    -webkit-appearance:menulist !important;
    appearance:auto !important;
    flex:0 0 auto;
  }
  .word-presentation-scan-status {
    min-height:32px; max-width:190px; padding:0 9px; border-radius:999px;
    display:inline-flex; align-items:center; justify-content:center;
    border:1px solid #bae6fd; background:#f0f9ff; color:#075985;
    font-size:11px; font-weight:900; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  .word-presentation-scan-status.is-ready { border-color:#86efac; background:#f0fdf4; color:#15803d; }
  .word-presentation-scan-status.is-waiting { border-color:#fdba74; background:#fff7ed; color:#c2410c; }
  .word-presentation-scan-status.is-saved { border-color:#4ade80; background:#dcfce7; color:#166534; }
  .word-presentation-result-btn { border-color:#7c3aed !important; background:#7c3aed !important; color:#fff !important; }
  .word-presentation-result-btn:hover:not(:disabled) { border-color:#6d28d9 !important; background:#6d28d9 !important; }
  .word-presentation-result-btn.is-previewed { border-color:#64748b !important; background:#64748b !important; }
  .word-presentation-region-btn { border:2px solid #ea580c !important; color:#c2410c !important; }
  .word-presentation-region-btn:hover:not(:disabled) { background:#fff7ed !important; border-color:#c2410c !important; }
  .word-presentation-region-btn.is-selecting { background:#fff7ed !important; }
  .word-presentation-region-btn.is-zoomed { background:#c2410c !important; border-color:#c2410c !important; color:#fff !important; }

  .word-presentation-jump {
    min-height:34px; display:flex; align-items:center; gap:5px; padding-left:8px;
    border:1px solid #cbd5e1; border-radius:10px; background:#f8fafc; white-space:nowrap;
  }
  .word-presentation-jump label { color:#334155; font-size:12px; font-weight:900; }
  .word-presentation-jump input {
    width:58px; height:30px; box-sizing:border-box; padding:0 6px; border:1px solid #94a3b8; border-radius:7px;
    background:#fff; color:#0f172a; font:900 14px/1 Arial, Helvetica, sans-serif; text-align:center; outline:none;
  }
  .word-presentation-jump input:focus { border-color:#2563eb; box-shadow:0 0 0 3px rgba(37,99,235,.16); }
  .word-presentation-jump input:disabled { opacity:.55; cursor:not-allowed; }
  .word-presentation-jump-view-btn {
    min-height:30px !important; height:30px; padding:0 10px !important; border-width:0 0 0 1px !important;
    border-color:#cbd5e1 !important; border-radius:0 9px 9px 0 !important; background:#fff !important; color:#1d4ed8 !important;
  }

  .word-presentation-viewport {
    position:relative; flex:1 1 auto; min-width:0; min-height:0; overflow:hidden;
    background:radial-gradient(circle at 50% 15%, #334155 0, #172033 42%, #0f172a 100%);
  }
  .word-presentation-fit-layer {
    position:absolute; left:50%; top:50%; transform-origin:center center;
    transform:translate(-50%, -50%) scale(1); will-change:transform;
  }
  .word-presentation-card {
    width:1500px; max-width:none; box-sizing:border-box; margin:0;
    padding:30px 38px 32px; border:0; border-radius:18px; background:#fff; color:#111827;
    box-shadow:0 24px 72px rgba(0,0,0,.35);
    font-family:"Times New Roman", Times, serif; font-size:44px; line-height:1.27; font-weight:400;
    overflow:visible; text-align:left; word-break:normal; overflow-wrap:normal;
  }
  .word-presentation-card.is-dense { font-size:40px; line-height:1.23; padding-top:25px; padding-bottom:27px; }
  .word-presentation-card.is-very-dense { font-size:36px; line-height:1.19; padding-top:22px; padding-bottom:24px; }
  .word-presentation-card.is-loading {
    width:920px; min-height:260px; display:flex; align-items:center; justify-content:center;
    font-family:Arial, Helvetica, sans-serif; font-size:31px; font-weight:800; text-align:center;
  }
  .word-presentation-question-line {
    display:block; min-width:0; margin:0;
  }
  .word-presentation-question-label { font-weight:800; white-space:nowrap; margin-right:.22em; color:#1d4ed8; }
  .word-presentation-question-prompt { min-width:0; display:inline; }
  .word-presentation-question-prompt:empty::after { content:"Nội dung câu hỏi"; color:#64748b; font-style:italic; }

  .word-presentation-content-shell { min-width:0; min-height:0; }
  .word-presentation-media-panel[hidden] { display:none !important; }
  .word-presentation-media-panel {
    min-width:0; min-height:0; box-sizing:border-box; overflow:hidden;
    display:flex; align-items:center; justify-content:center; gap:8px;
    padding:0; background:#fff;
  }
  /* Không ép bảng lên trước bằng CSS: thứ tự phần tử trong panel chính là
     thứ tự ảnh/bảng/biểu đồ xuất hiện trong file Word. */
  .word-presentation-card.has-presentation-media {
    overflow:hidden; padding:clamp(18px, 2.1vw, 30px) clamp(20px, 2.5vw, 38px);
  }
  .word-presentation-card.has-presentation-media .word-presentation-content-shell {
    height:100%; display:grid; align-items:start; align-content:stretch;
  }
  .word-presentation-card.has-presentation-media .word-presentation-question-line {
    min-width:0; align-self:start; position:relative; z-index:1;
  }
  .word-presentation-card.has-presentation-media .word-presentation-items {
    min-width:0; min-height:0; align-self:start; position:relative; z-index:1;
    margin-top:.34em;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel {
    position:relative; z-index:0; align-self:stretch; justify-self:stretch;
  }

  /* Hình vẽ/biểu đồ: câu hỏi ở trên, lựa chọn bên trái, hình lớn bên phải.
     Tỉ lệ vùng hình tối đa xấp xỉ 2/3 màn chiếu, giống cách bố trí của Kiểm tra ngay. */
  .word-presentation-card.media-layout-figure .word-presentation-content-shell {
    /* Mở rộng cột phương án đến sát vùng hình, chỉ chừa một khe nhỏ. */
    grid-template-columns:minmax(340px, 48%) minmax(0, 52%);
    grid-template-rows:auto minmax(0, 1fr);
    column-gap:clamp(6px, .7vw, 12px); row-gap:clamp(8px, 1.1vh, 16px);
  }
  .word-presentation-card.media-layout-figure.media-needs-more-text .word-presentation-content-shell {
    grid-template-columns:minmax(380px, 54%) minmax(0, 46%);
  }
  .word-presentation-card.media-layout-figure .word-presentation-question-line {
    grid-column:1 / -1; grid-row:1;
  }
  .word-presentation-card.media-layout-figure .word-presentation-items {
    grid-column:1; grid-row:2; width:100%; max-width:100%;
  }
  .word-presentation-card.media-layout-figure .word-presentation-media-panel {
    grid-column:2; grid-row:2; width:100%; height:100%;
    align-items:flex-end; justify-content:flex-end;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-media-panel {
    grid-column:1 / -1; grid-row:2; width:min(100%, 1180px); justify-self:center;
    align-items:center; justify-content:center;
  }

  /* Khi một câu có đồng thời hình và bảng, xếp vùng phương tiện toàn chiều rộng phía dưới
     để không có phần nào chồng lên câu hỏi hoặc phương án. */
  .word-presentation-card.media-layout-mixed .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr);
    grid-template-rows:auto auto minmax(0, 1fr);
    row-gap:clamp(7px, 1vh, 14px);
  }
  .word-presentation-card.media-layout-mixed .word-presentation-question-line { grid-column:1; grid-row:1; }
  .word-presentation-card.media-layout-mixed .word-presentation-items { grid-column:1; grid-row:2; width:100%; }
  .word-presentation-card.media-layout-mixed .word-presentation-media-panel {
    grid-column:1; grid-row:3; width:100%; height:100%;
    align-items:center; justify-content:center; overflow:visible;
  }
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel { grid-row:2 / span 2; }

  /* Bảng ngang: câu hỏi và phương án ở trên, bảng dùng toàn bộ chiều rộng phía dưới. */
  .word-presentation-card.media-layout-table-horizontal .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr);
    grid-template-rows:auto auto minmax(0, 1fr);
    row-gap:clamp(7px, 1vh, 14px);
  }
  .word-presentation-card.media-layout-table-horizontal .word-presentation-question-line {
    grid-column:1; grid-row:1;
  }
  .word-presentation-card.media-layout-table-horizontal .word-presentation-items {
    grid-column:1; grid-row:2; width:100%;
  }
  .word-presentation-card.media-layout-table-horizontal .word-presentation-media-panel {
    grid-column:1; grid-row:3; width:100%; height:100%;
    align-items:center; justify-content:center; overflow:visible;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel {
    grid-row:2 / span 2;
  }

  /* Bảng dọc: bảng ở bên phải; câu hỏi và phương án dùng phần còn lại bên trái. */
  .word-presentation-card.media-layout-table-vertical .word-presentation-content-shell {
    /* Cột bảng lấy đúng chiều rộng thật của bảng (max-content), phần chữ dùng toàn bộ chỗ còn lại.
       Nếu tổng hai vùng chưa vừa, thuật toán giảm cỡ chữ chung nên bảng không chồng lên đề bài. */
    grid-template-columns:minmax(300px, 1fr) max-content;
    grid-template-rows:auto minmax(0, 1fr);
    column-gap:clamp(12px, 1.3vw, 24px); row-gap:clamp(7px, 1vh, 14px);
  }
  .word-presentation-card.media-layout-table-vertical.media-needs-more-text .word-presentation-content-shell {
    grid-template-columns:minmax(340px, 1fr) max-content;
  }
  .word-presentation-card.media-layout-table-vertical .word-presentation-question-line {
    grid-column:1; grid-row:1;
  }
  .word-presentation-card.media-layout-table-vertical .word-presentation-items {
    grid-column:1; grid-row:2; width:100%;
  }
  .word-presentation-card.media-layout-table-vertical .word-presentation-media-panel {
    grid-column:2; grid-row:1 / span 2; width:max-content; max-width:none; height:100%;
    align-items:flex-start; justify-content:flex-end; justify-self:end; overflow:visible;
  }

  /* Câu tự luận/trả lời ngắn không có khối phương án riêng: toàn bộ phần a/b/c/d
     nằm trong dòng nội dung câu hỏi. Nếu vẫn dùng hàng đầu cao tự động thì phần chữ
     có thể chiếm hết chiều cao, làm vùng hình/bảng phía dưới bằng 0. Dành sẵn một
     vùng hiển thị thực cho phương tiện để hình vẽ, bảng biểu và biểu đồ luôn xuất hiện. */
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-content-shell {
    grid-template-columns:minmax(0, 58%) minmax(260px, 42%);
    grid-template-rows:minmax(0, 1fr);
    column-gap:clamp(12px, 1.5vw, 26px); row-gap:0;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-question-line {
    grid-column:1; grid-row:1; min-height:0; align-self:center;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-media-panel {
    grid-column:2; grid-row:1; width:100%; height:100%; min-height:180px;
    justify-self:stretch; align-self:stretch; align-items:center; justify-content:center;
  }

  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-content-shell,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-content-shell {
    grid-template-columns:minmax(0, 54%) minmax(300px, 46%);
    grid-template-rows:minmax(0, 1fr);
    column-gap:clamp(12px, 1.5vw, 26px); row-gap:0;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-question-line,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-question-line {
    grid-column:1; grid-row:1; min-height:0; align-self:center;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel {
    grid-column:2; grid-row:1; width:100%; height:100%; min-height:180px;
    justify-self:stretch; align-self:stretch; align-items:center; justify-content:center;
    overflow:visible;
  }

  .word-presentation-card.media-layout-table-vertical.media-without-items .word-presentation-question-line {
    grid-row:1 / span 2; min-height:0; align-self:start;
  }

  /* Tự luận có đồng thời hình và bảng: đặt toàn bộ phương tiện ở cột phải.
     Cách này giữ phần a/b/c/d ở cột trái, tránh vùng hình phía dưới chồng lên
     các ý dài khi màn hình thấp hoặc cửa sổ đang ở chế độ thu nhỏ. */
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-content-shell {
    grid-template-columns:minmax(0, 58%) minmax(280px, 42%);
    grid-template-rows:minmax(0, 1fr);
    column-gap:clamp(12px, 1.5vw, 26px); row-gap:0;
  }
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-question-line {
    grid-column:1; grid-row:1; min-height:0; align-self:center;
  }
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel {
    grid-column:2; grid-row:1; width:100%; height:100%; min-height:180px;
    justify-self:stretch; align-self:stretch; align-items:stretch; justify-content:center;
    flex-direction:column; overflow:hidden;
  }

  /* Chỉ bảng dữ liệu thuần (không chứa ảnh, SVG, canvas hoặc hình DrawingML)
     mới chuyển sang vùng bảng ngang: đề bài ở trên, bảng trải toàn chiều rộng phía dưới.
     Các câu có ảnh giữ nguyên hoàn toàn bố cục của bản cũ. */
  .word-presentation-card.media-layout-table-horizontal.media-without-items.cv7991-pure-data-table .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr);
    grid-template-rows:max-content max-content;
    align-content:center;
    row-gap:clamp(8px, 1.15vh, 18px); column-gap:0;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items.cv7991-pure-data-table .word-presentation-question-line {
    grid-column:1; grid-row:1; min-height:auto; align-self:start;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items.cv7991-pure-data-table .word-presentation-media-panel {
    grid-column:1; grid-row:2; width:100%; height:auto; min-height:auto;
    justify-self:stretch; align-self:start; align-items:center; justify-content:center;
    overflow:visible;
  }

  /* Bảng của câu tự luận đặt trong cột phương tiện phải co theo cột thay vì giữ
     max-content, nếu không toàn bộ slide bị thu nhỏ quá mức. Cho phép nội dung ô
     xuống dòng để bảng vẫn đọc được ở màn hình thu nhỏ. */
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel > table,
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel > .single-exam-inline-table,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel > table,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel > .single-exam-inline-table {
    width:100% !important; max-width:100% !important; min-width:0 !important;
    table-layout:fixed !important; margin:auto 0 !important;
  }
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel td,
  .word-presentation-card.media-layout-table-horizontal.media-without-items .word-presentation-media-panel th,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel td,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel th {
    white-space:normal !important; word-break:normal !important;
    overflow-wrap:anywhere !important;
  }

  /* Ảnh, hình vẽ và biểu đồ luôn giữ tỉ lệ, tự phóng lớn trong vùng dành cho hình. */
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > img,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > canvas {
    display:block !important; width:100% !important; height:100% !important;
    max-width:100% !important; max-height:100% !important; min-width:0 !important; min-height:0 !important;
    margin:0 !important; padding:0 !important; border:0 !important; border-radius:0 !important;
    background:#fff !important; box-shadow:none !important; object-fit:contain !important;
    object-position:right bottom; aspect-ratio:auto !important;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > .single-exam-inline-vector {
    display:flex !important; align-items:center !important; justify-content:center !important;
    width:100% !important; height:100% !important; max-width:100% !important; max-height:100% !important;
    margin:0 !important; padding:0 !important; line-height:0 !important;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > .single-exam-inline-vector > svg {
    display:block !important; width:100% !important; height:100% !important;
    max-width:100% !important; max-height:100% !important; overflow:visible !important;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel.is-multiple-media {
    flex-direction:column; align-items:stretch; justify-content:center;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel.is-multiple-media > img,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel.is-multiple-media > canvas,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel.is-multiple-media > .single-exam-inline-vector {
    flex:1 1 0; width:100% !important; height:auto !important; max-height:calc(50% - 4px) !important;
  }

  /* Bảng biểu dùng cùng cỡ chữ với câu hỏi. Thuật toán sẽ giảm cỡ chữ chung của cả slide
     nếu bảng chưa vừa, thay vì làm riêng bảng quá nhỏ. */
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > table,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel > .single-exam-inline-table {
    display:table; width:max-content; height:max-content; max-width:none !important; max-height:none !important;
    border-collapse:collapse; margin:auto !important; color:#111827; background:#fff;
    font-size:1em !important; line-height:1.18 !important; table-layout:auto !important;
    transform:none !important; transform-origin:center center;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel td,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel th {
    font-size:inherit; line-height:1.18; vertical-align:middle;
    padding:.14em .22em !important; white-space:nowrap !important;
    word-break:keep-all !important; overflow-wrap:normal !important;
  }
  /* MathType trong ô của bảng dữ liệu thuần phải nằm gọn trong lòng ô.
     Không áp dụng cho bảng Word dùng để bố trí/chứa hình, để phần trình chiếu ảnh giữ nguyên bản cũ. */
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel td,
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel th {
    overflow:hidden;
  }
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel td .cv7991-word-table-paragraph,
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel th .cv7991-word-table-paragraph {
    min-width:0; max-width:100%; margin:0; overflow:hidden;
  }
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel td .single-exam-inline-formula,
  .word-presentation-card.cv7991-pure-data-table .word-presentation-media-panel th .single-exam-inline-formula {
    vertical-align:middle !important;
    transform-origin:center center !important;
  }
  .word-presentation-card.has-presentation-media .word-presentation-media-panel tr.cv7991-table-title-row > td,
  .word-presentation-card.has-presentation-media .word-presentation-media-panel tr.cv7991-table-title-row > th {
    font-size:.5em !important; line-height:1.12 !important;
  }

  .word-presentation-items { margin-top:18px; min-width:0; }
  .word-presentation-items.is-grid {
    display:grid; grid-template-columns:repeat(2, minmax(0,1fr)); gap:12px 24px;
  }
  /* Giữ đúng bố cục 4 phương án trên cùng một hàng của tài liệu Word.
     Khung trình chiếu sẽ giảm cỡ chữ chung nếu cần, không tự đổi thành 2 x 2. */
  .word-presentation-items.is-four-columns {
    display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:10px 16px;
  }
  .word-presentation-items.is-four-columns .word-presentation-item {
    grid-template-columns:1.18em minmax(0,1fr); column-gap:.08em;
    padding:.16em .22em; border-radius:.22em;
  }
  .word-presentation-items.is-stacked { display:grid; grid-template-columns:minmax(0,1fr); gap:10px; }
  /* Câu có hình vẽ/biểu đồ ở bên phải: cột phương án bên trái luôn xếp
     A, B, C, D thành 4 hàng; không dùng lưới 2 hàng x 2 cột trong vùng hẹp. */
  .word-presentation-card.media-layout-figure .word-presentation-items {
    display:grid; grid-template-columns:minmax(0,1fr); grid-auto-flow:row; gap:8px;
  }
  .word-presentation-item {
    min-width:0; display:grid; grid-template-columns:1.7em minmax(0,1fr); align-items:center; column-gap:.18em;
    padding:8px 12px; box-sizing:border-box; border:1px solid #dbe4f0; border-radius:12px;
    background:#fbfdff; break-inside:avoid;
  }
  .word-presentation-item.is-correct-answer,
  .word-presentation-item.is-scan-correct-answer {
    background:#fef2f2; border-color:#ef4444; color:#b91c1c;
    box-shadow:inset 0 0 0 2px rgba(220,38,38,.12);
  }
  .word-presentation-item.is-correct-answer .word-presentation-item-label,
  .word-presentation-item.is-correct-answer .word-presentation-item-content,
  .word-presentation-item.is-correct-answer .single-exam-rich,
  .word-presentation-item.is-correct-answer .single-exam-inline-fallback,
  .word-presentation-item.is-scan-correct-answer .word-presentation-item-label,
  .word-presentation-item.is-scan-correct-answer .word-presentation-item-content,
  .word-presentation-item.is-scan-correct-answer .single-exam-rich,
  .word-presentation-item.is-scan-correct-answer .single-exam-inline-fallback {
    color:inherit !important; font-weight:800;
  }
  .word-presentation-item-label {
    align-self:stretch; display:flex; align-items:center; justify-content:flex-start;
    font-weight:800; white-space:nowrap; color:#1d4ed8;
  }
  .word-presentation-item-content { min-width:0; align-self:center; }
  .word-presentation-items.is-statements .word-presentation-item {
    grid-template-columns:1.55em minmax(0,1fr); padding:8px 12px; background:#fff;
  }
  /* Tự luận nhiều ý dùng cùng kiểu hàng rõ ràng như câu nhiều lựa chọn và
     Đúng–Sai, nhưng luôn xếp a), b), c), d) theo một cột dưới đề bài. */
  .word-presentation-items.is-essay-parts {
    display:grid; grid-template-columns:minmax(0,1fr); grid-auto-flow:row; gap:10px;
    width:100%; max-width:100%;
  }
  .word-presentation-items.is-essay-parts .word-presentation-item {
    grid-template-columns:1.55em minmax(0,1fr); align-items:start;
    padding:8px 12px; background:#fff;
  }
  .word-presentation-items.is-essay-parts .word-presentation-item-label,
  .word-presentation-items.is-essay-parts .word-presentation-item-content {
    align-self:start;
  }
  .word-presentation-tf-scan-btn,
  .word-presentation-tf-saved-mark { display:none; }
  /* Dùng câu hỏi của MVIP: hiện nút Quét ở đầu từng ý Đúng–Sai giống Trình chiếu câu hỏi Word. */
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-items.is-statements > .word-presentation-item.has-scan-control,
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-scan-control {
    grid-template-columns:auto 1.55em minmax(0,1fr) auto !important;
    column-gap:.18em !important;
  }
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-tf-scan-btn {
    display:inline-flex !important;
    align-items:center;
    justify-content:center;
    align-self:center;
    min-width:64px;
    min-height:34px;
    padding:0 10px;
    border:2px solid #0ea5e9;
    border-radius:10px;
    background:#f0f9ff;
    color:#0369a1;
    cursor:pointer;
    font-family:Arial, Helvetica, sans-serif;
    font-size:clamp(13px, .30em, 20px);
    line-height:1;
    font-weight:900;
    white-space:nowrap;
  }
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-tf-scan-btn:hover:not(:disabled) {
    background:#e0f2fe;
    border-color:#0284c7;
  }
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-item.is-scan-target {
    border-color:#fb923c !important;
    background:#fff7ed !important;
    box-shadow:inset 0 0 0 2px rgba(249,115,22,.14) !important;
  }
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-item.is-scan-target .word-presentation-tf-scan-btn {
    border-color:#ea580c;
    background:#ea580c;
    color:#fff;
  }
  #singleExamPresenter .single-exam-word-live-mode .word-presentation-tf-scan-btn:disabled {
    cursor:default;
    opacity:.72;
  }
  .word-presentation-tf-status-mark {
    display:inline-flex; align-items:center; justify-content:center; align-self:center;
    min-width:42px; min-height:34px; padding:0 9px; border-radius:10px;
    border:2px solid currentColor; background:#fff;
    font-family:Arial, Helvetica, sans-serif; font-size:clamp(18px, .38em, 28px); line-height:1; font-weight:1000;
  }
  .word-presentation-tf-status-mark.is-true { border-color:#22c55e; background:#ecfdf5; color:#15803d; }
  .word-presentation-tf-status-mark.is-false { border-color:#ef4444; background:#fef2f2; color:#dc2626; }
  .word-presentation-items.is-statements .word-presentation-item.has-answer-mark,
  .word-presentation-items.is-statements .word-presentation-item.has-result-mark {
    grid-template-columns:1.55em minmax(0,1fr) auto; column-gap:.18em;
  }
  .word-presentation-item.has-answer-mark .word-presentation-tf-saved-mark,
  .word-presentation-item.has-result-mark .word-presentation-tf-saved-mark { display:none !important; }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-items.is-statements .word-presentation-item.has-scan-control {
    grid-template-columns:auto 1.55em minmax(0,1fr) auto;
    column-gap:.18em;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-items.is-statements .word-presentation-item.has-scan-result {
    grid-template-columns:1.55em minmax(0,1fr) auto;
    column-gap:.18em;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-tf-scan-btn {
    display:inline-flex; align-items:center; justify-content:center; align-self:center;
    min-width:64px; min-height:34px; padding:0 10px; border:2px solid #0ea5e9;
    border-radius:10px; background:#f0f9ff; color:#0369a1; cursor:pointer;
    font-family:Arial, Helvetica, sans-serif; font-size:clamp(13px, .30em, 20px); line-height:1; font-weight:900;
    white-space:nowrap;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-tf-scan-btn:hover:not(:disabled) {
    background:#e0f2fe; border-color:#0284c7;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-item.is-scan-target {
    border-color:#fb923c; background:#fff7ed; box-shadow:inset 0 0 0 2px rgba(249,115,22,.14);
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-item.is-scan-target .word-presentation-tf-scan-btn {
    border-color:#ea580c; background:#ea580c; color:#fff;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-tf-saved-mark:not(:empty) {
    display:inline-flex; align-items:center; justify-content:center; align-self:center;
    min-width:42px; min-height:34px; padding:0 9px; border-radius:10px;
    border:2px solid currentColor; background:#fff;
    font-family:Arial, Helvetica, sans-serif; font-size:clamp(18px, .38em, 28px); line-height:1; font-weight:1000;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-tf-saved-mark.is-true {
    border-color:#22c55e; background:#ecfdf5; color:#15803d;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view) .word-presentation-tf-saved-mark.is-false {
    border-color:#ef4444; background:#fef2f2; color:#dc2626;
  }
  .word-presentation-unparsed { margin-top:12px; }

  .word-presentation-card .single-exam-rich { display:inline; max-width:none; color:inherit; }
  .word-presentation-card .single-exam-inline-media {
    display:inline-block; vertical-align:middle; width:auto; height:auto; object-fit:contain;
    max-width:100% !important; max-height:390px !important; margin:.08em .12em;
    border:0; border-radius:0; background:transparent; box-shadow:none;
  }
  /* Khi giữ nguyên luồng Word, JavaScript đổi kích thước gốc sang em.
     Ảnh đạt ngưỡng chiều cao hoặc tỷ lệ rất ngang dùng đúng cỡ ký tự của đoạn
     Word; quy tắc bố cục cũ vẫn giữ cho ảnh khác. */
  .cv7991-word-source-media-flow .single-exam-inline-media.cv7991-word-small-flow-image:not(.single-exam-inline-formula),
  .cv7991-word-source-media-flow .single-exam-inline-vector.cv7991-word-small-flow-image:not(.single-exam-inline-formula) {
    max-width:100% !important;
    max-height:none !important;
  }
  /* DrawingML nhóm vốn được dựng dạng block; nếu ảnh cao không quá 4 ký tự,
     hoặc cao hơn nhưng có tỷ lệ rộng/cao lớn hơn 4, thì trả nó về dạng inline
     đúng vị trí trong dòng Word. */
  .cv7991-word-source-media-flow .single-exam-word-group-figure.cv7991-word-small-flow-image {
    display:inline-flex !important;
    clear:none !important;
    vertical-align:middle !important;
    margin:.08em .12em !important;
  }
  .word-presentation-formula-tail {
    display:inline-block; white-space:nowrap; vertical-align:baseline; line-height:inherit;
  }
  .word-presentation-formula-tail-punct { display:inline; white-space:nowrap; }
  .word-presentation-card .single-exam-inline-formula {
    max-width:none !important;
    max-height:none !important;
    transform-origin:center bottom;
    /* Giá trị dự phòng trước khi JavaScript đo chính xác phần nét của MathType. */
    vertical-align:-.22em;
  }
  .word-presentation-card .single-exam-word-group-figure {
    /* Bảng biến thiên/DrawingML phải nằm đúng vị trí trong dòng nội dung Word,
       không bị kéo sang cột hình bên phải như một ảnh minh họa thông thường. */
    display:block; width:auto; height:auto;
    max-width:min(90%, 820px) !important; max-height:410px !important;
    margin:.22em 0 .34em !important; line-height:0;
  }
  .word-presentation-card .single-exam-word-group-figure > svg {
    display:block; width:100%; height:100%; overflow:visible;
  }
  .word-presentation-card .single-exam-inline-vector {
    display:inline-flex; vertical-align:middle; align-items:center; justify-content:center;
    max-width:100%; max-height:390px; margin:.08em .12em; line-height:0;
  }
  .word-presentation-card .single-exam-inline-vector svg,
  .word-presentation-card .single-exam-mathjax-svg {
    max-width:100% !important; max-height:330px !important; overflow:visible;
  }
  .word-presentation-card .single-exam-inline-table {
    border-collapse:collapse; max-width:100%; margin:10px 0; background:#fff; color:#111827;
    font-size:.72em; line-height:1.2; table-layout:auto;
  }
  .word-presentation-card .single-exam-inline-table td,
  .word-presentation-card .single-exam-inline-table th {
    border:1px solid #111827; padding:4px 8px; vertical-align:middle;
    white-space:normal; word-break:normal; overflow-wrap:normal;
  }
  .word-presentation-card .single-exam-inline-fallback { font-size:.82em; font-style:italic; color:#475569; }

  /* Bảng dữ liệu ngang giữ tại đúng chỗ của token bảng trong phần đề bài Word.
     Dùng cùng cỡ chữ/cách kẻ ô với bảng ngang trước đây, nhưng không kéo bảng
     xuống sau các phương án. Các bảng chứa hình và bảng dọc vẫn dùng bố cục cũ. */
  .word-presentation-card:not(.is-all-view) .word-presentation-question-prompt .single-exam-inline-table.cv7991-source-horizontal-table {
    display:table !important; width:max-content !important; height:max-content !important;
    max-width:none !important; max-height:none !important; clear:both;
    border-collapse:collapse !important; margin:.18em auto .24em !important;
    color:#111827 !important; background:#fff !important;
    font-size:1em !important; line-height:1.18 !important; table-layout:auto !important;
    transform:none !important; transform-origin:center center !important;
    break-inside:avoid; page-break-inside:avoid;
  }
  .word-presentation-card:not(.is-all-view) .word-presentation-question-prompt .single-exam-inline-table.cv7991-source-horizontal-table td,
  .word-presentation-card:not(.is-all-view) .word-presentation-question-prompt .single-exam-inline-table.cv7991-source-horizontal-table th {
    font-size:inherit !important; line-height:1.18 !important; vertical-align:middle !important;
    padding:.14em .22em !important; white-space:nowrap !important;
    word-break:keep-all !important; overflow-wrap:normal !important;
  }
  .word-presentation-card:not(.is-all-view) .word-presentation-question-prompt .single-exam-inline-table.cv7991-source-horizontal-table tr.cv7991-table-title-row > td,
  .word-presentation-card:not(.is-all-view) .word-presentation-question-prompt .single-exam-inline-table.cv7991-source-horizontal-table tr.cv7991-table-title-row > th {
    font-size:.5em !important; line-height:1.12 !important;
  }
  .word-presentation-card sup { font-size:.7em; line-height:0; vertical-align:super; }
  .word-presentation-card sub { font-size:.7em; line-height:0; vertical-align:sub; }

  .word-presentation-answer-modal[hidden] { display:none !important; }
  .word-presentation-answer-modal {
    position:absolute; inset:0; z-index:6; display:flex; align-items:flex-end; justify-content:center;
    padding:18px; box-sizing:border-box;
  }
  .word-presentation-answer-backdrop {
    position:absolute; inset:0; background:transparent; backdrop-filter:none; -webkit-backdrop-filter:none;
  }
  .word-presentation-answer-dialog {
    position:relative; width:min(1500px, calc(100vw - 24px)); max-height:min(92vh, calc(100vh - 24px)); overflow:auto;
    border-radius:18px; border:1px solid #f9a8d4; background:#fff1f2; box-shadow:0 18px 48px rgba(15,23,42,.20);
    transform:translate(var(--word-answer-drag-x, 0px), var(--word-answer-drag-y, 0px));
    will-change:transform; cursor:move; touch-action:none;
  }
  .word-presentation-answer-dialog.is-dragging { user-select:none; }
  .word-presentation-answer-head {
    position:sticky; top:0; z-index:1; display:flex; align-items:center; justify-content:space-between; gap:12px;
    padding:14px 18px; background:#ffe4e6; border-bottom:1px solid #fecdd3;
    --word-answer-header-font-size:15px;
    cursor:move; user-select:none; touch-action:none;
  }
  .word-presentation-answer-dialog.is-dragging,
  .word-presentation-answer-dialog.is-dragging .word-presentation-answer-head { cursor:grabbing; }
  .word-presentation-answer-head h3 {
    margin:0; color:#2563eb; font-size:var(--word-answer-header-font-size); line-height:1.2; font-weight:800;
  }
  .word-presentation-answer-close {
    min-height:40px; border-radius:11px; border:1px solid #cbd5e1; background:#fff; color:#334155;
    font-size:var(--word-answer-header-font-size); font-weight:800; cursor:pointer; padding:0 14px;
  }
  .word-presentation-answer-close:hover { background:#f8fafc; border-color:#94a3b8; }
  .word-presentation-answer-close, .word-presentation-answer-dialog button, .word-presentation-answer-dialog a,
  .word-presentation-answer-dialog input, .word-presentation-answer-dialog select, .word-presentation-answer-dialog textarea {
    cursor:auto; touch-action:auto;
  }
  .word-presentation-answer-content {
    padding:24px 28px 30px; color:#0f172a; background:#fff1f2; font-size:clamp(44px, 4.2vw, 60px); line-height:1.45; font-weight:400;
  }
  .word-presentation-answer-content *,
  .word-presentation-answer-content strong,
  .word-presentation-answer-content b {
    font-weight:400 !important;
  }
  /* Trong phần Đáp án, chữ của bảng lấy đúng cỡ chữ đang dùng bên ngoài bảng.
     Quy tắc này chỉ áp dụng trong hộp Đáp án và ghi đè các tỉ lệ thu nhỏ của
     bảng Word (kể cả hàng tiêu đề), nên chữ trong bảng không thể lớn hơn chữ
     đáp án bên ngoài. Cho phép xuống dòng để bảng nhiều cột không tràn khung. */
  .word-presentation-answer-content table,
  .word-presentation-answer-content table * {
    font-size:inherit !important;
  }
  .word-presentation-answer-content table {
    max-width:100% !important;
    line-height:1.25 !important;
  }
  .word-presentation-answer-content table th,
  .word-presentation-answer-content table td,
  .word-presentation-answer-content table .cv7991-word-table-paragraph {
    line-height:1.25 !important;
    white-space:normal !important;
    word-break:normal !important;
    overflow-wrap:anywhere !important;
  }
  .word-presentation-answer-content .single-exam-inline-table tr.cv7991-table-title-row > th,
  .word-presentation-answer-content .single-exam-inline-table tr.cv7991-table-title-row > td {
    font-size:inherit !important;
  }
  .word-presentation-answer-content .single-exam-inline-media { max-width:100%; max-height:680px; }
  .word-presentation-answer-content .single-exam-inline-formula,
  .word-presentation-answer-content .single-exam-inline-vector svg,
  .word-presentation-answer-content .single-exam-mathjax-svg { max-height:560px !important; }
  .word-presentation-answer-empty {
    color:#334155; font-size:clamp(40px, 4vw, 52px); line-height:1.45; font-weight:400;
  }
  .word-presentation-essay-answer-buttons {
    display:flex; flex-wrap:wrap; align-items:center; gap:12px;
  }
  .word-presentation-essay-answer-button {
    display:inline-flex; align-items:center; justify-content:center;
    min-width:64px; min-height:58px; padding:4px 18px;
    border:2px solid #2563eb; border-radius:12px;
    background:#eff6ff; color:#1d4ed8; cursor:pointer;
    font-family:"Times New Roman",serif; font-size:clamp(28px,3vw,40px) !important;
    line-height:1.2; text-transform:none !important;
  }
  .word-presentation-essay-answer-button:hover { background:#dbeafe; }
  .word-presentation-essay-answer-button.is-active { background:#2563eb; color:#fff; }
  .word-presentation-essay-answer-button:focus-visible { outline:3px solid #f59e0b; outline-offset:3px; }
  .word-presentation-essay-answer-detail { margin-top:22px; }
  .word-presentation-essay-answer-detail[hidden] { display:none !important; }

  .word-presentation-answer-parts {
    display:grid; grid-template-columns:minmax(0, 1fr); gap:.38em;
  }
  .word-presentation-answer-part {
    display:grid; grid-template-columns:1.25em minmax(0, 1fr); align-items:start; column-gap:.12em;
  }
  .word-presentation-answer-part-label {
    color:#1d4ed8; font-weight:400;
  }
  .word-presentation-answer-part-content { min-width:0; }

  /* Hình ảnh trong Trình chiếu Word có thể bấm trực tiếp để phóng to. */
  .word-presentation-direct-zoom {
    cursor:zoom-in !important;
    transition:filter .16s ease, box-shadow .16s ease, outline-color .16s ease;
    outline:2px solid transparent;
    outline-offset:4px;
  }
  .word-presentation-direct-zoom:hover {
    filter:brightness(1.025);
    outline-color:rgba(37,99,235,.72);
    box-shadow:0 0 0 5px rgba(37,99,235,.12);
  }
  .word-presentation-direct-zoom:focus-visible {
    outline:4px solid #2563eb !important;
    outline-offset:5px;
  }
  .word-presentation-image-zoom-modal[hidden] { display:none !important; }
  .word-presentation-image-zoom-modal {
    position:absolute; inset:0; z-index:14; display:flex; align-items:center; justify-content:center;
    box-sizing:border-box; padding:10px;
  }
  .word-presentation-image-zoom-backdrop {
    position:absolute; inset:0; background:rgba(2,6,23,.84);
    backdrop-filter:blur(2px); -webkit-backdrop-filter:blur(2px);
  }
  .word-presentation-image-zoom-dialog {
    position:relative; display:flex; flex-direction:column;
    width:min(98vw, 1900px); height:min(96vh, 1080px);
    max-width:calc(100vw - 20px); max-height:calc(100vh - 20px);
    overflow:hidden; border-radius:18px; border:1px solid rgba(255,255,255,.45);
    background:#f8fafc; box-shadow:0 30px 90px rgba(0,0,0,.58);
  }
  .word-presentation-image-zoom-head {
    flex:0 0 auto; display:flex; align-items:center; justify-content:space-between; gap:14px;
    min-height:54px; padding:8px 12px 8px 18px; border-bottom:1px solid #cbd5e1;
    background:#fff; color:#0f172a;
  }
  .word-presentation-image-zoom-head strong {
    min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
    font-family:Arial, Helvetica, sans-serif; font-size:18px; line-height:1.2; font-weight:900;
  }
  .word-presentation-image-zoom-close {
    flex:0 0 auto; min-height:38px; padding:0 16px; border-radius:10px;
    border:1px solid #94a3b8; background:#fff; color:#0f172a;
    font-family:Arial, Helvetica, sans-serif; font-size:15px; font-weight:900; cursor:pointer;
  }
  .word-presentation-image-zoom-close:hover { background:#eff6ff; border-color:#2563eb; color:#1d4ed8; }
  .word-presentation-image-zoom-body {
    position:relative; flex:1 1 auto; min-width:0; min-height:0; overflow:auto;
    display:flex; align-items:center; justify-content:center; padding:12px;
    background:repeating-conic-gradient(#f8fafc 0% 25%, #eef2f7 0% 50%) 50% / 24px 24px;
    overscroll-behavior:contain;
  }
  .word-presentation-image-zoom-content {
    position:relative;
    flex:0 0 auto; display:flex; align-items:center; justify-content:center;
    min-width:1px; min-height:1px; max-width:none; max-height:none;
    background:#fff; line-height:0; box-shadow:0 10px 36px rgba(15,23,42,.22);
  }
  .word-presentation-image-zoom-content > img,
  .word-presentation-image-zoom-content > canvas,
  .word-presentation-image-zoom-content > svg,
  .word-presentation-image-zoom-content > .single-exam-inline-vector,
  .word-presentation-image-zoom-content > .single-exam-word-group-figure,
  .word-presentation-image-zoom-content > * {
    display:block !important; width:100% !important; height:100% !important;
    min-width:0 !important; min-height:0 !important;
    max-width:none !important; max-height:none !important;
    margin:0 !important; border:0 !important; border-radius:0 !important;
    box-shadow:none !important; transform:none !important; object-fit:contain !important;
  }
  .word-presentation-image-zoom-content svg {
    display:block !important; width:100% !important; height:100% !important;
    max-width:none !important; max-height:none !important; overflow:visible !important;
  }
  .word-presentation-image-zoom-hint {
    position:absolute; left:50%; bottom:10px; transform:translateX(-50%);
    padding:6px 12px; border-radius:999px; background:rgba(15,23,42,.78); color:#fff;
    font-family:Arial, Helvetica, sans-serif; font-size:13px; font-weight:800; line-height:1.2;
    pointer-events:none; white-space:nowrap;
  }
  @media (max-width:720px) {
    .word-presentation-image-zoom-modal { padding:4px; }
    .word-presentation-image-zoom-dialog {
      width:calc(100vw - 8px); height:calc(100vh - 8px);
      max-width:calc(100vw - 8px); max-height:calc(100vh - 8px); border-radius:12px;
    }
    .word-presentation-image-zoom-head { min-height:48px; padding:6px 8px 6px 12px; }
    .word-presentation-image-zoom-head strong { font-size:15px; }
    .word-presentation-image-zoom-body { padding:6px; }
  }

  .word-presentation-viewport.word-presentation-region-selecting { cursor:crosshair; }
  .word-presentation-fit-layer.word-presentation-region-base-hidden { visibility:hidden; }
  .word-presentation-region-overlay {
    position:absolute; inset:0; z-index:8; background:rgba(15,23,42,.08); cursor:crosshair;
    touch-action:none; user-select:none;
  }
  .word-presentation-region-selection-box {
    position:absolute; display:none; box-sizing:border-box; border:3px solid #f97316;
    background:rgba(249,115,22,.13); box-shadow:0 0 0 9999px rgba(15,23,42,.24);
    pointer-events:none;
  }
  .word-presentation-region-zoom-pane {
    position:absolute; inset:0; z-index:7; overflow:hidden; background:#0f172a; pointer-events:none;
  }
  .word-presentation-region-zoom-scene {
    position:absolute; left:0; top:0; transform-origin:0 0; will-change:transform;
  }
  .word-presentation-region-zoom-scene .word-presentation-fit-layer {
    visibility:visible !important;
  }

  body.word-presentation-open .result-modal { z-index:9600; }
  body.word-presentation-open .alert-modal,
  body.word-presentation-open .action-confirm-modal { z-index:9700; }
  body.word-presentation-open .result-modal-backdrop { background:rgba(15,23,42,.36); }
  body.word-presentation-open .result-dialog { top:50%; }

  .word-presentation-presenter.is-all-view .word-presentation-viewport {
    overflow:auto !important; background:#e5e7eb; overscroll-behavior:contain; scroll-behavior:smooth;
  }
  .word-presentation-presenter.is-all-view .word-presentation-fit-layer {
    position:static !important; left:auto !important; top:auto !important;
    width:100% !important; height:auto !important; min-width:0 !important; min-height:100% !important;
    max-width:none !important; max-height:none !important; margin:0 !important; padding:0 !important;
    transform:none !important; transform-origin:center top !important; will-change:auto;
  }
  .word-presentation-card.is-all-view {
    position:relative !important; left:auto !important; top:auto !important;
    width:calc(100% - 24px) !important; min-width:0 !important; max-width:calc(100% - 24px) !important;
    height:auto !important; min-height:0 !important; max-height:none !important;
    margin:12px auto; padding:24px 30px 28px; border-radius:10px; font-size:25px; line-height:1.43;
    box-shadow:0 12px 34px rgba(15,23,42,.18); overflow:visible !important; transform:none !important;
  }
  .word-presentation-all-document { width:100%; min-width:0; }
  .word-presentation-all-loading {
    position:sticky; top:8px; z-index:4; width:max-content; max-width:calc(100% - 16px);
    margin:0 auto 18px; padding:8px 14px; border:1px solid #93c5fd; border-radius:999px;
    background:rgba(239,246,255,.96); color:#1d4ed8; box-shadow:0 6px 20px rgba(15,23,42,.12);
    font:800 14px/1.25 Arial, Helvetica, sans-serif; text-align:center;
  }
  .word-presentation-all-question {
    min-width:0; margin:0 0 32px; padding:0 0 32px; border-bottom:1px solid #cbd5e1; break-inside:avoid-page;
    content-visibility:auto; contain-intrinsic-size:auto 360px;
  }
  .word-presentation-all-question[data-wp-all-prepared="0"] { contain-intrinsic-size:auto 330px; }
  .word-presentation-all-question:last-child { margin-bottom:0; padding-bottom:0; border-bottom:0; }
  .word-presentation-card.is-all-view .word-presentation-question-label[data-word-open-question-index] {
    display:inline-block; cursor:pointer; border-radius:8px; padding:1px 5px; margin-left:-5px;
    transition:background-color .14s ease, box-shadow .14s ease, text-decoration-color .14s ease;
    text-decoration:underline; text-decoration-color:transparent; text-underline-offset:.16em;
  }
  .word-presentation-card.is-all-view .word-presentation-question-label[data-word-open-question-index]:hover {
    background:#dbeafe; text-decoration-color:currentColor;
  }
  .word-presentation-card.is-all-view .word-presentation-question-label[data-word-open-question-index]:focus-visible {
    outline:3px solid #60a5fa; outline-offset:2px; background:#eff6ff;
    box-shadow:0 0 0 2px #fff; text-decoration-color:currentColor;
  }
  .word-presentation-card.is-all-view .word-presentation-content-shell { display:block; height:auto; }
  .word-presentation-card.is-all-view .word-presentation-media-panel { display:none !important; }
  .word-presentation-card.is-all-view .word-presentation-items {
    margin-top:12px; gap:8px; align-items:start;
    display:grid; grid-template-columns:minmax(0, 1fr) !important;
  }
  .word-presentation-card.is-all-view .word-presentation-items.is-grid,
  .word-presentation-card.is-all-view .word-presentation-items.is-four-columns,
  .word-presentation-card.is-all-view .word-presentation-items.is-stacked,
  .word-presentation-card.is-all-view .word-presentation-items.is-statements {
    display:grid; grid-template-columns:minmax(0, 1fr) !important; gap:8px !important;
  }
  .word-presentation-card.is-all-view .word-presentation-item,
  .word-presentation-card.is-all-view .word-presentation-items.is-statements .word-presentation-item {
    display:inline-grid; width:auto; max-width:100%; justify-self:start; align-self:start;
    padding:6px 10px; border:1px solid #dbe4f0; border-radius:12px; background:#fbfdff;
  }
  .word-presentation-card.is-all-view .single-exam-inline-media { max-height:560px !important; }
  .word-presentation-card.is-all-view .single-exam-inline-formula,
  .word-presentation-card.is-all-view .single-exam-inline-vector svg,
  .word-presentation-card.is-all-view .single-exam-mathjax-svg { max-height:500px !important; }

  /* Trong chế độ Tất cả, chữ của bảng lấy đúng cỡ chữ đang dùng bên ngoài
     bảng. Ghi đè các tỉ lệ thu nhỏ riêng của bảng Word và hàng tiêu đề, đồng
     thời cho phép nội dung ô xuống dòng để bảng nhiều cột không tràn khung. */
  .word-presentation-card.is-all-view table,
  .word-presentation-card.is-all-view table * {
    font-size:inherit !important;
  }
  .word-presentation-card.is-all-view table {
    max-width:100% !important;
    line-height:1.25 !important;
  }
  .word-presentation-card.is-all-view table th,
  .word-presentation-card.is-all-view table td,
  .word-presentation-card.is-all-view table .cv7991-word-table-paragraph {
    line-height:1.25 !important;
    white-space:normal !important;
    word-break:normal !important;
    overflow-wrap:anywhere !important;
  }
  .word-presentation-card.is-all-view .single-exam-inline-table tr.cv7991-table-title-row > th,
  .word-presentation-card.is-all-view .single-exam-inline-table tr.cv7991-table-title-row > td {
    font-size:inherit !important;
  }


  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-content-shell {
    display:grid; grid-template-columns:minmax(0, 1fr) var(--wp-all-media-width, 50vw);
    grid-template-rows:auto minmax(0, 1fr);
    column-gap:clamp(10px, 1.3vw, 22px); row-gap:clamp(8px, 1vh, 16px);
    align-items:start;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-question-line {
    grid-column:1 / -1; grid-row:1;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-items {
    grid-column:1; grid-row:2; margin-top:0; width:100%;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel {
    display:flex !important; grid-column:2; grid-row:2; width:var(--wp-all-media-width, 50vw);
    height:var(--wp-all-media-height, 66vh); max-width:var(--wp-all-media-width, 50vw);
    max-height:var(--wp-all-media-height, 66vh); justify-self:end; align-self:start;
    align-items:center; justify-content:center; overflow:hidden;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-media-without-items .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr) var(--wp-all-media-width, 50vw);
    grid-template-rows:minmax(0, 1fr);
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-media-without-items .word-presentation-question-line {
    grid-column:1; grid-row:1;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-media-without-items .word-presentation-media-panel {
    grid-column:2; grid-row:1;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel > img,
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel > canvas,
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel > .single-exam-inline-vector {
    display:block !important; width:100% !important; height:100% !important;
    max-width:100% !important; max-height:100% !important; object-fit:contain !important;
    object-position:center !important;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel.is-multiple-media {
    flex-direction:column; align-items:stretch; justify-content:flex-start; gap:8px;
  }
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel.is-multiple-media > img,
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel.is-multiple-media > canvas,
  .word-presentation-card.is-all-view .word-presentation-all-question.wp-all-view-has-media .word-presentation-media-panel.is-multiple-media > .single-exam-inline-vector {
    flex:1 1 0; width:100% !important; height:auto !important; max-height:calc(50% - 4px) !important;
  }

  @media (max-width:1120px) {
    .word-presentation-toolbar { flex-wrap:wrap; }
    .word-presentation-title { flex:1 1 100%; }
    .word-presentation-title strong { max-width:88vw; }
    .word-presentation-actions { width:100%; justify-content:flex-end; overflow-x:auto; padding-bottom:1px; }
  }
  @media (max-width:900px) {
    .word-presentation-toolbar { gap:7px; padding:6px 8px; }
    .word-presentation-title strong { max-width:31vw; font-size:13px; }
    .word-presentation-type { display:none; }
    .word-presentation-toolbar button { min-height:32px; padding:0 8px; font-size:12px; }
    .word-presentation-class-select { width:122px; height:32px; }
    .word-presentation-countdown-input { width:104px; height:32px; font-size:13px; }
    .word-presentation-scan-status { display:none; }
    .word-presentation-fullscreen-btn { max-width:92px; overflow:hidden; text-overflow:ellipsis; }
    .word-presentation-card { width:1180px; }
  }
  @media (max-width:620px) {
    .word-presentation-title { display:none; }
    .word-presentation-actions { width:100%; justify-content:flex-start; overflow-x:auto; }
    .word-presentation-toolbar { min-height:48px; }
    /* Khung trình chiếu có canvas cố định rồi được co theo màn hình, vì vậy không phá
       bố cục 2 cột/4 cột gốc chỉ do chiều rộng cửa sổ trình duyệt nhỏ. */
    .word-presentation-card.has-presentation-media .word-presentation-content-shell {
      grid-template-columns:minmax(0,1fr) !important;
      grid-template-rows:auto auto minmax(0,1fr) !important;
      row-gap:8px !important;
    }
    .word-presentation-card.has-presentation-media .word-presentation-question-line { grid-column:1 !important; grid-row:1 !important; }
    .word-presentation-card.has-presentation-media .word-presentation-items { grid-column:1 !important; grid-row:2 !important; }
    .word-presentation-card.has-presentation-media .word-presentation-media-panel {
      grid-column:1 !important; grid-row:3 !important; width:100% !important; height:100% !important;
      align-items:center !important; justify-content:center !important;
    }
    .word-presentation-all-btn { padding:0 8px !important; }
    .word-presentation-jump { padding-left:6px; }
    .word-presentation-jump input { width:52px; }
    .word-presentation-card.is-all-view {
      width:calc(100% - 16px) !important; max-width:calc(100% - 16px) !important;
      margin:8px auto; padding:24px 18px 30px; border-radius:8px; font-size:20px; line-height:1.4;
    }
    .word-presentation-all-question { margin-bottom:24px; padding-bottom:24px; }
  }
</style>

<style id="mvip-force-one-column-options">
  /* Bố trí thống nhất tất cả phương án A/B/C/D thành một cột. */
  .single-exam-options-grid,
  .single-exam-word-options,
  .single-exam-word-options.is-stacked,
  .word-presentation-items.is-grid,
  .word-presentation-items.is-four-columns,
  .word-presentation-items.is-stacked,
  .word-presentation-card.media-layout-figure .word-presentation-items {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    grid-auto-flow: row !important;
    column-gap: 0 !important;
  }

  .single-exam-word-options,
  .single-exam-word-options.is-stacked,
  .word-presentation-items.is-grid,
  .word-presentation-items.is-four-columns,
  .word-presentation-items.is-stacked {
    width: 100% !important;
    max-width: none !important;
  }

  .single-exam-word-option,
  .single-exam-word-options.is-stacked .single-exam-word-option,
  .word-presentation-item {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  /* Căn giữa dọc: nhãn A/B/C/D luôn ở giữa ô. Với ô một dòng,
     cả cụm chữ/công thức có hộp nội dung một dòng cũng nằm giữa chiều cao ô. */
  .single-exam-word-option,
  .single-exam-word-options.is-stacked .single-exam-word-option {
    align-items: center !important;
  }
  .single-exam-word-option-label {
    align-self: stretch !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
  }
  .single-exam-word-option-body {
    align-self: center !important;
  }
  .word-presentation-item {
    align-items: center !important;
  }
  .word-presentation-item-label {
    align-self: stretch !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
  }
  .word-presentation-item-content {
    align-self: center !important;
  }

  /* Toàn bộ nội dung của một phương án nằm trong đúng một khối dòng chảy.
     Chữ và công thức chạy liên tục đến hết chiều rộng ô rồi mới tự xuống dòng;
     không chia các đoạn chữ quanh công thức thành nhiều flex-item riêng. */
  .single-exam-word-option-body > .single-exam-word-option-flow,
  .word-presentation-item-content > .word-presentation-item-flow {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    white-space: normal !important;
    word-break: normal !important;
    overflow-wrap: normal !important;
    text-align: left !important;
    line-height: inherit !important;
  }
  .single-exam-word-option-body > .single-exam-word-option-flow > .single-exam-rich,
  .word-presentation-item-content > .word-presentation-item-flow > .single-exam-rich {
    display: inline !important;
    max-width: none !important;
    white-space: normal !important;
  }

  /* Khi nội dung phương án thực tế chỉ chiếm một dòng, tách dòng chữ/công thức
     khỏi cơ chế căn theo baseline của inline formatting và căn cả cụm theo tâm ô. */
  .single-exam-word-option.is-single-visual-line .single-exam-word-option-body,
  .word-presentation-item.is-single-visual-line .word-presentation-item-content {
    align-self: stretch !important;
    display: flex !important;
    align-items: center !important;
    line-height: 1 !important;
    min-height: 0 !important;
    transform: none !important;
  }
  .single-exam-word-option.is-single-visual-line .single-exam-word-option-flow,
  .word-presentation-item.is-single-visual-line .word-presentation-item-flow {
    display: block !important;
    width: 100% !important;
    line-height: 1 !important;
  }
  .single-exam-word-option.is-single-visual-line .single-exam-word-option-flow > .single-exam-rich,
  .word-presentation-item.is-single-visual-line .word-presentation-item-flow > .single-exam-rich {
    display: inline !important;
    line-height: 1 !important;
    vertical-align: middle !important;
  }
  .word-presentation-item.is-single-visual-line .word-presentation-formula-tail,
  .word-presentation-question-prompt .word-presentation-formula-tail {
    display: inline-block !important;
    vertical-align: baseline !important;
    line-height: inherit !important;
  }
  .single-exam-word-option.is-single-visual-line .single-exam-inline-formula,
  .word-presentation-item.is-single-visual-line .single-exam-inline-formula,
  .single-exam-word-question .single-exam-inline-formula,
  .word-presentation-question-prompt .single-exam-inline-formula {
    vertical-align: middle !important;
    transform-origin: center center !important;
  }
  /* JavaScript gắn lớp này cho công thức một dòng sau khi đo khoảng trắng trong
     ảnh/SVG; quy tắc baseline phải thắng quy tắc căn giữa chung ở phía trên. */
  .single-exam-inline-formula.cv-inline-baseline-formula {
    vertical-align: baseline !important;
    transform-origin: center bottom !important;
  }

  /* Phân thức MathType cần một khe nhỏ với chữ hai bên; chiều cao dòng do
     JavaScript giữ đầy đủ nên mẫu số không đè lên dòng kế tiếp. */
  .single-exam-presenter .single-exam-inline-formula.cv-mathtype-fraction-bar,
  .word-presentation-presenter .single-exam-inline-formula.cv-mathtype-fraction-bar {
    margin-left:.08em !important;
    margin-right:.08em !important;
  }

  /* Ghi đè quy tắc căn giữa chung: ý tự luận nhiều dòng phải bắt đầu từ đầu
     hàng, để a), b), c), d) đọc tự nhiên như một danh sách dọc. */
  .word-presentation-items.is-essay-parts .word-presentation-item {
    align-items: start !important;
  }
  .word-presentation-items.is-essay-parts .word-presentation-item-label {
    align-self: start !important;
    align-items: flex-start !important;
    padding-top: .02em;
  }
  .word-presentation-items.is-essay-parts .word-presentation-item-content {
    align-self: start !important;
  }
</style>

<style id="mvip-word-presentation-media-rules-20260818">
  /* Câu có ảnh/biểu đồ trong Trình chiếu Word luôn giữ 1 cột phương án,
     kể cả khi bấm Toàn màn hình. */
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-items,
  .word-presentation-presenter:fullscreen .word-presentation-card.has-presentation-media .word-presentation-items,
  .word-presentation-presenter:-webkit-full-screen .word-presentation-card.has-presentation-media .word-presentation-items,
  .word-presentation-presenter.is-fallback-fullscreen .word-presentation-card.has-presentation-media .word-presentation-items {
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) !important;
    grid-auto-flow:row !important;
    gap:10px !important;
    width:100% !important;
    max-width:none !important;
  }

  /* Ảnh hoặc biểu đồ giữ đúng tỉ lệ, đạt rộng 1/2 màn chiếu hoặc cao 2/3 màn chiếu.
     Phần còn lại ở bên trái và phía trên dành cho đề bài, phương án, các ý. */
  .word-presentation-card.media-layout-figure .word-presentation-content-shell,
  .word-presentation-card.media-layout-mixed .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr) var(--wp-media-target-width, 50%) !important;
    grid-template-rows:auto minmax(0, 1fr) !important;
    column-gap:clamp(10px, 1.2vw, 20px) !important;
    row-gap:clamp(8px, 1vh, 16px) !important;
  }
  .word-presentation-card.media-layout-figure .word-presentation-question-line,
  .word-presentation-card.media-layout-mixed .word-presentation-question-line {
    grid-column:1 / -1 !important;
    grid-row:1 !important;
  }
  .word-presentation-card.media-layout-figure .word-presentation-items,
  .word-presentation-card.media-layout-mixed .word-presentation-items {
    grid-column:1 !important;
    grid-row:2 !important;
  }
  .word-presentation-card.media-layout-figure .word-presentation-media-panel,
  .word-presentation-card.media-layout-mixed .word-presentation-media-panel {
    grid-column:2 !important;
    grid-row:2 !important;
    width:var(--wp-media-target-width, 50%) !important;
    height:var(--wp-media-target-height, 66.667%) !important;
    max-width:var(--wp-media-target-width, 50%) !important;
    max-height:var(--wp-media-target-height, 66.667%) !important;
    justify-self:end !important;
    align-self:end !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
    overflow:hidden !important;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-content-shell,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr) var(--wp-media-target-width, 50%) !important;
    grid-template-rows:minmax(0, 1fr) !important;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-question-line,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-question-line {
    grid-column:1 !important;
    grid-row:1 !important;
  }
  .word-presentation-card.media-layout-figure.media-without-items .word-presentation-media-panel,
  .word-presentation-card.media-layout-mixed.media-without-items .word-presentation-media-panel {
    grid-column:2 !important;
    grid-row:1 !important;
  }
</style>

<style id="cv7991-option-visible-vertical-center-style">
  /* align-self:stretch đã căn đầy chiều cao hàng. Không dùng min-height:100%:
     chiều cao phần trăm trong hàng grid tự động có thể tạo vòng phụ thuộc trên
     WebKit, làm ô đáp án phình cao và bộ tự co chữ lùi về mức nhỏ nhất. */
  .single-exam-word-option:not(.is-essay-part) .single-exam-word-option-body,
  .word-presentation-items:not(.is-statements):not(.is-essay-parts) .word-presentation-item-content {
    align-self: stretch !important;
    display: flex !important;
    align-items: center !important;
    min-height: 0 !important;
  }
  .single-exam-word-option-flow,
  .word-presentation-item-flow {
    transform-origin: left center !important;
  }
</style>
<style id="regular-test-use-word-presentation-display">
  /* Kiểm tra ngay dùng trực tiếp cùng kiểu thẻ và bố cục với Trình chiếu Word. */
  .single-exam-slide.single-exam-word-live-mode {
    position:relative !important;
    display:block !important;
    align-items:stretch !important;
    justify-content:stretch !important;
    gap:0 !important;
    padding:12px !important;
    overflow:hidden !important;
    background:#0f172a !important;
  }
  .single-exam-slide.single-exam-word-live-mode::before { display:none !important; }
  .regular-test-word-viewport {
    position:relative;
    width:100%;
    height:100%;
    min-width:0;
    min-height:0;
    overflow:hidden;
    border-radius:18px;
    background:radial-gradient(circle at 50% 15%, #334155 0, #172033 42%, #0f172a 100%);
  }
  .regular-test-word-fit-layer {
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%, -50%) scale(1);
    transform-origin:center center;
    will-change:transform;
  }
  .regular-test-word-card.word-presentation-card {
    margin:0 !important;
    max-width:none !important;
    box-sizing:border-box !important;
  }
  .regular-test-word-card .word-presentation-question-label,
  .regular-test-word-card .word-presentation-item-label {
    color:#1d4ed8 !important;
  }
  .regular-test-word-card .word-presentation-items {
    grid-template-columns:minmax(0, 1fr) !important;
  }
  .regular-test-word-card .word-presentation-item {
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
  }
  body.mvip-tier-limited .single-exam-presenter.single-exam-limited-mode .single-exam-slide.single-exam-word-live-mode {
    height:auto !important;
    min-height:0 !important;
  }
  @media (max-width:620px) {
    .single-exam-slide.single-exam-word-live-mode { padding:6px !important; }
    .regular-test-word-viewport { border-radius:12px; }
  }
</style>

<style id="mvip-clear-word-question-item-borders">
  /* Viền rõ hơn một chút cho phương án A/B/C/D và các ý a/b/c/d.
     Chế độ Xem toàn bộ vẫn giữ bố cục tài liệu không có khung. */
  .word-presentation-card:not(.is-all-view) .word-presentation-item {
    border-width:2px !important;
    border-style:solid !important;
  }
  .word-presentation-card:not(.is-all-view)
    .word-presentation-item:not(.is-correct-answer):not(.cv7991-answer-correct):not(.cv7991-answer-wrong):not(.is-scan-correct-answer):not(.is-scan-target) {
    border-color:#b8c7d9 !important;
  }
</style>

<style id="mvip-presentation-mathtype-image-refinement-20260817">
  /* MathType trình chiếu giữ nét nguyên bản: không filter, không bóng và không ép đậm. */
  .single-exam-presenter .single-exam-inline-formula,
  .word-presentation-presenter .single-exam-inline-formula {
    font-weight:400 !important;
    font-synthesis:none !important;
    text-shadow:none !important;
    filter:none !important;
    -webkit-filter:none !important;
  }
  .single-exam-presenter .single-exam-inline-formula svg,
  .single-exam-presenter .single-exam-inline-formula svg *,
  .word-presentation-presenter .single-exam-inline-formula svg,
  .word-presentation-presenter .single-exam-inline-formula svg * {
    text-shadow:none !important;
    filter:none !important;
    -webkit-filter:none !important;
  }

  /* Modal phóng to dùng chung và luôn nằm trên presenter toàn màn hình. */
  .word-presentation-image-zoom-modal {
    position:fixed !important;
    inset:0 !important;
    z-index:120000 !important;
  }
  body.presentation-image-zoom-open { overflow:hidden !important; }

  /* Dùng câu hỏi của MVIP: hình/biểu đồ giữ tỷ lệ trong khung đạt rộng 1/2 hoặc cao 2/3 màn chiếu. */
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-content-shell,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-content-shell {
    grid-template-columns:minmax(0, 1fr) var(--mvip-figure-panel-width, 50%) !important;
    grid-template-rows:auto minmax(0, 1fr) !important;
  }
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel {
    width:var(--mvip-figure-panel-width, 50%) !important;
    height:var(--mvip-figure-panel-height, 66.667%) !important;
    max-width:var(--mvip-figure-panel-width, 50%) !important;
    max-height:var(--mvip-figure-panel-height, 66.667%) !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
    overflow:hidden !important;
  }
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel > img,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel > canvas,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel > .single-exam-inline-vector,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > img,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > canvas,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > .single-exam-inline-vector {
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    object-fit:contain !important;
    object-position:right bottom !important;
  }
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel > .single-exam-inline-vector,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > .single-exam-inline-vector {
    display:flex !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
  }
  .single-exam-word-live-mode .regular-test-word-card.media-layout-figure .word-presentation-media-panel > .single-exam-inline-vector > svg,
  .single-exam-word-live-mode .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > .single-exam-inline-vector > svg {
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    object-fit:contain !important;
    object-position:right bottom !important;
  }
  .single-exam-word-live-mode .regular-test-word-card .word-presentation-items,
  .single-exam-word-live-mode .regular-test-word-card .word-presentation-items[data-mvip-option-columns="2"],
  .single-exam-word-live-mode .regular-test-word-card .word-presentation-items[data-mvip-option-columns="4"] {
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) !important;
    grid-auto-flow:row !important;
    column-gap:0 !important;
    row-gap:8px !important;
    width:100% !important;
    max-width:100% !important;
  }
</style>

<style id="mvip-word-media-no-overlap-20260818">
  /* Dùng câu hỏi của MVIP: khi có ảnh/biểu đồ bên phải,
     nội dung phương án phải bị chặn trong cột trái và tự xuống dòng,
     kể cả các chuỗi rất dài không có khoảng trắng. */
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-items,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-content,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich {
    min-width:0 !important;
    max-width:100% !important;
    box-sizing:border-box !important;
  }

  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item {
    overflow:hidden !important;
  }

  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-content,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow,
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich {
    white-space:normal !important;
    overflow-wrap:anywhere !important;
    word-break:break-word !important;
  }

  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich * {
    max-width:100% !important;
  }
</style>

<style id="word-presentation-media-no-overlap-20260818">
  /* Trình chiếu Word: khi có ảnh/biểu đồ bên phải,
     nội dung phương án phải luôn bị chặn trong cột trái và tự xuống dòng,
     kể cả chuỗi rất dài không có khoảng trắng. */
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-items,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-content,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-flow,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-question-prompt,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich {
    min-width:0 !important;
    max-width:100% !important;
    box-sizing:border-box !important;
  }

  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item {
    overflow:hidden !important;
  }

  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-content,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-flow,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-question-prompt,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich {
    white-space:normal !important;
    overflow-wrap:anywhere !important;
    word-break:break-word !important;
  }

  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich *,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich * {
    max-width:100% !important;
  }
</style>
<style id="cv7991-single-number-option-fix-20260818">
  .cv7991-presenter-single-number {
    display:inline !important;
    font:inherit !important;
    font-size:1em !important;
    line-height:inherit !important;
    font-weight:inherit !important;
    color:inherit !important;
    vertical-align:baseline !important;
    white-space:nowrap !important;
  }

  /* Các quy tắc xuống dòng đã chặn nội dung trong cột trái. Không được dùng
     overflow:hidden cho cả ô vì MathType được căn bằng translateY và có thể
     bị cắt gần hết phần nét nhìn thấy. */
  .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item,
  .word-presentation-presenter .word-presentation-card.has-presentation-media .word-presentation-item {
    overflow:visible !important;
  }
</style>
<style id="word-presentation-bottom-right-media-v8">
  /* Trình chiếu Word từng câu: vùng ảnh/biểu đồ luôn bám góc phải dưới.
     Không tác động đến chế độ Tất cả. */
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-figure .word-presentation-media-panel,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-mixed .word-presentation-media-panel {
    align-self:end !important;
    justify-self:end !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-figure .word-presentation-media-panel > img,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-figure .word-presentation-media-panel > canvas,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-mixed .word-presentation-media-panel > img,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-mixed .word-presentation-media-panel > canvas {
    object-position:right bottom !important;
    align-self:flex-end !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-figure .word-presentation-media-panel > .single-exam-inline-vector,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-mixed .word-presentation-media-panel > .single-exam-inline-vector {
    display:flex !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
    align-self:flex-end !important;
    transform-origin:right bottom !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-figure .word-presentation-media-panel > .single-exam-inline-vector > svg,
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.media-layout-mixed .word-presentation-media-panel > .single-exam-inline-vector > svg {
    transform-origin:right bottom !important;
  }
</style>
<style id="cv7991-bottom-right-media-option-flow-v9">
  /* Ảnh/biểu đồ nằm tuyệt đối ở góc phải dưới. Các phương án nằm hoàn toàn
     phía trên phần HÌNH NHÌN THẤY được dùng toàn bộ chiều rộng; chỉ phương án
     thực sự giao theo chiều dọc với hình mới thu về phần bên trái. */
  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.cv7991-bottom-right-media-flow .word-presentation-content-shell,
  .single-exam-word-live-mode
    .regular-test-word-card.cv7991-bottom-right-media-flow .word-presentation-content-shell {
    display:block !important;
    position:relative !important;
    height:100% !important;
    min-height:0 !important;
    overflow:visible !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.cv7991-bottom-right-media-flow .word-presentation-question-line,
  .single-exam-word-live-mode
    .regular-test-word-card.cv7991-bottom-right-media-flow .word-presentation-question-line {
    position:relative !important;
    z-index:2 !important;
    width:100%;
    max-width:100%;
    box-sizing:border-box !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.cv7991-bottom-right-media-flow .word-presentation-items,
  .single-exam-word-live-mode
    .regular-test-word-card.cv7991-bottom-right-media-flow .word-presentation-items {
    position:relative !important;
    z-index:2 !important;
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) !important;
    grid-auto-flow:row !important;
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
    column-gap:0 !important;
    align-items:start !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.cv7991-bottom-right-media-flow .word-presentation-media-panel,
  .single-exam-word-live-mode
    .regular-test-word-card.cv7991-bottom-right-media-flow .word-presentation-media-panel {
    position:absolute !important;
    left:auto !important;
    top:auto !important;
    right:0 !important;
    bottom:0 !important;
    z-index:1 !important;
    align-self:auto !important;
    justify-self:auto !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
    overflow:hidden !important;
  }

  .word-presentation-presenter:not(.is-all-view)
    .word-presentation-card.cv7991-bottom-right-media-flow .word-presentation-item,
  .single-exam-word-live-mode
    .regular-test-word-card.cv7991-bottom-right-media-flow .word-presentation-item {
    min-width:0 !important;
    box-sizing:border-box !important;
    justify-self:start !important;
  }
</style>

<style id="cv7991-vertical-overflow-scroll-v2">
  /* Cỡ chữ và bố cục luôn được tính trên mặt phẳng của màn hình lớn. Khi cửa sổ
     thu nhỏ, toàn bộ mặt phẳng được co đồng dạng; không bố trí lại theo khung nhỏ. */
  .word-presentation-fit-layer.cv7991-proportional-canvas,
  .regular-test-word-fit-layer.cv7991-proportional-canvas {
    margin:0 !important;
    transform-origin:center center !important;
    will-change:transform;
  }

  /* Nếu nội dung ở cỡ chữ logic 16 pt vẫn cao hơn mặt phẳng màn hình lớn, chỉ vùng
     câu hỏi được cuộn. Lớp thẻ bên trong vẫn giữ nguyên kích thước logic và được
     co theo đúng cùng hệ số với chế độ không cuộn. */
  .word-presentation-viewport.cv7991-vertical-scroll,
  .regular-test-word-viewport.cv7991-vertical-scroll {
    overflow-y:auto !important;
    overflow-x:hidden !important;
    overscroll-behavior:contain;
    scrollbar-gutter:stable;
    touch-action:pan-y;
    -webkit-overflow-scrolling:touch;
  }
  .word-presentation-viewport.cv7991-vertical-scroll.cv7991-horizontal-scroll,
  .regular-test-word-viewport.cv7991-vertical-scroll.cv7991-horizontal-scroll {
    overflow-x:auto !important;
  }
  .word-presentation-viewport.cv7991-vertical-scroll > .word-presentation-fit-layer,
  .regular-test-word-viewport.cv7991-vertical-scroll > .regular-test-word-fit-layer {
    box-sizing:content-box !important;
    will-change:auto !important;
  }
  .word-presentation-viewport.cv7991-vertical-scroll > .word-presentation-fit-layer > .word-presentation-card,
  .regular-test-word-viewport.cv7991-vertical-scroll > .regular-test-word-fit-layer > .regular-test-word-card {
    box-sizing:border-box !important;
    margin:0 !important;
  }

  .word-presentation-viewport.cv7991-vertical-scroll::-webkit-scrollbar,
  .regular-test-word-viewport.cv7991-vertical-scroll::-webkit-scrollbar {
    width:12px;
    height:12px;
  }
  .word-presentation-viewport.cv7991-vertical-scroll::-webkit-scrollbar-track,
  .regular-test-word-viewport.cv7991-vertical-scroll::-webkit-scrollbar-track {
    background:rgba(15,23,42,.22);
  }
  .word-presentation-viewport.cv7991-vertical-scroll::-webkit-scrollbar-thumb,
  .regular-test-word-viewport.cv7991-vertical-scroll::-webkit-scrollbar-thumb {
    border:3px solid transparent;
    border-radius:999px;
    background:rgba(148,163,184,.88);
    background-clip:padding-box;
  }
</style>


<style id="cv7991-fullscreen-font16pt-guard-v1">
  /* Khi thật sự ở toàn màn hình, không được co cả mặt phẳng trình chiếu thêm lần nữa.
     Nội dung không đủ chiều cao sẽ dùng cơ chế cuộn dọc của JavaScript. */
  .word-presentation-presenter:fullscreen:not(.is-all-view) .word-presentation-fit-layer.cv7991-proportional-canvas,
  .word-presentation-presenter:-webkit-full-screen:not(.is-all-view) .word-presentation-fit-layer.cv7991-proportional-canvas,
  .word-presentation-presenter.is-fallback-fullscreen:not(.is-all-view) .word-presentation-fit-layer.cv7991-proportional-canvas,
  .single-exam-presenter:fullscreen .regular-test-word-fit-layer.cv7991-proportional-canvas,
  .single-exam-presenter:-webkit-full-screen .regular-test-word-fit-layer.cv7991-proportional-canvas,
  body.single-exam-fullscreen-fallback .regular-test-word-fit-layer.cv7991-proportional-canvas {
    transform:translate(-50%, -50%) scale(1) !important;
  }
</style>

<style id="cv7991-word-toolbar-controls-v10">
  /* Ô đếm ngược gọn hơn nhưng vẫn đủ chỗ cho “Số giây”. */
  .word-presentation-countdown-input {
    width:86px !important;
    min-width:86px !important;
    max-width:86px !important;
    padding-left:6px !important;
    padding-right:6px !important;
  }

  /* Nút toàn màn hình chỉ dùng biểu tượng hai mũi tên trên đường chéo. */
  .word-presentation-fullscreen-btn {
    width:42px !important;
    min-width:42px !important;
    max-width:42px !important;
    padding:0 !important;
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    line-height:1 !important;
    overflow:visible !important;
  }
  .word-presentation-fullscreen-icon {
    display:block;
    width:21px;
    height:21px;
    flex:0 0 21px;
    pointer-events:none;
  }
  .word-presentation-fullscreen-btn.is-fullscreen-active {
    background:#2563eb !important;
    border-color:#2563eb !important;
    color:#fff !important;
  }

  /* Không cho nút kết quả lóe lên trước khi JavaScript xác nhận trial/full. */
  .word-presentation-result-btn[hidden],
  .word-presentation-presenter:not(.wp-scan-authorized) .word-presentation-result-btn {
    display:none !important;
  }

  @media (max-width:900px) {
    .word-presentation-countdown-input {
      width:80px !important;
      min-width:80px !important;
      max-width:80px !important;
    }
    .word-presentation-fullscreen-btn {
      width:38px !important;
      min-width:38px !important;
      max-width:38px !important;
    }
    .word-presentation-fullscreen-icon {
      width:19px;
      height:19px;
      flex-basis:19px;
    }
  }
</style>
<style id="cv7991-word-fullscreen-position-v11">
  /* Đưa nút phóng to/thu nhỏ về sát góc trên bên phải, ngay trước nút X. */
  .word-presentation-fullscreen-btn {
    order:95 !important;
  }
  .word-presentation-close-btn {
    order:100 !important;
  }
</style>
<style id="cv7991-mvip-fullscreen-controls-v12">
  /* Dùng câu hỏi của MVIP: nút toàn màn hình chỉ dùng biểu tượng hai mũi tên
     trên cùng đường chéo với Trình chiếu Word và được đặt ngay trước nút X. */
  .single-exam-fullscreen-btn {
    order:95 !important;
    width:42px !important;
    min-width:42px !important;
    max-width:42px !important;
    padding:0 !important;
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    line-height:1 !important;
    overflow:visible !important;
  }
  .single-exam-fullscreen-icon {
    display:block;
    width:21px;
    height:21px;
    flex:0 0 21px;
    pointer-events:none;
  }
  .single-exam-close-btn {
    order:100 !important;
  }
  .single-exam-view-btn {
    white-space:nowrap !important;
  }
  @media (max-width:900px) {
    .single-exam-fullscreen-btn {
      width:38px !important;
      min-width:38px !important;
      max-width:38px !important;
    }
    .single-exam-fullscreen-icon {
      width:19px;
      height:19px;
      flex-basis:19px;
    }
  }
</style>

<style id="cv7991-presentation-image-frame-v13">
  /* Khung ảnh rõ ràng và toàn bộ hộp hình đều là vùng bấm phóng to.
     Chỉ áp dụng trong hai cửa sổ trình chiếu, không áp dụng cho MathType. */
  #wordPresentationPresenter .cv7991-presentation-image-frame,
  #singleExamPresenter .cv7991-presentation-image-frame {
    box-sizing:border-box !important;
    border:2px solid #94a3b8 !important;
    border-radius:8px !important;
    background:#fff !important;
    box-shadow:0 0 0 1px rgba(255,255,255,.9), 0 4px 14px rgba(15,23,42,.16) !important;
    cursor:zoom-in !important;
    pointer-events:auto !important;
    touch-action:manipulation !important;
    transition:border-color .15s ease, box-shadow .15s ease, filter .15s ease !important;
  }
  #wordPresentationPresenter .cv7991-presentation-image-frame:hover,
  #singleExamPresenter .cv7991-presentation-image-frame:hover {
    border-color:#2563eb !important;
    box-shadow:0 0 0 3px rgba(37,99,235,.16), 0 5px 16px rgba(15,23,42,.18) !important;
    filter:brightness(1.015);
  }
  #wordPresentationPresenter .cv7991-presentation-image-frame:focus-visible,
  #singleExamPresenter .cv7991-presentation-image-frame:focus-visible {
    outline:4px solid rgba(37,99,235,.9) !important;
    outline-offset:3px !important;
  }
  #wordPresentationPresenter .cv7991-presentation-image-frame svg,
  #wordPresentationPresenter .cv7991-presentation-image-frame svg *,
  #singleExamPresenter .cv7991-presentation-image-frame svg,
  #singleExamPresenter .cv7991-presentation-image-frame svg * {
    cursor:zoom-in !important;
  }
  #wordPresentationPresenter .cv7991-click-zoom-media-panel,
  #singleExamPresenter .cv7991-click-zoom-media-panel {
    cursor:zoom-in !important;
    pointer-events:auto !important;
  }

  /* Công thức MathType/MathJax không phải ảnh minh họa nên không thêm khung. */
  #wordPresentationPresenter .single-exam-inline-formula,
  #wordPresentationPresenter .single-exam-inline-formula svg,
  #singleExamPresenter .single-exam-inline-formula,
  #singleExamPresenter .single-exam-inline-formula svg {
    border:0 !important;
    border-radius:0 !important;
    box-shadow:none !important;
    cursor:inherit !important;
  }

  /* MathType sống trong “Trình chiếu câu hỏi Word thành câu hỏi tương tác”.
     Để MathJax tự quyết baseline, độ cao, độ sâu và tỷ lệ của công thức.
     Chỉ bỏ giao diện kiểu ảnh; không ép vị trí/hộp/kích thước. */
  #wordPresentationPresenter .mvip-interactive-live-mathtype {
    display:inline !important;
    margin:0 .025em !important;
    padding:0 !important;
    border:0 !important;
    outline:0 !important;
    box-shadow:none !important;
    background:transparent !important;
    color:inherit !important;
    font-family:"Times New Roman", Times, serif !important;
    font-size:1em !important;
    font-weight:inherit !important;
    white-space:nowrap !important;
  }
  #wordPresentationPresenter .mvip-interactive-live-mathtype.is-simple-number,
  #wordPresentationPresenter .mvip-interactive-live-mathtype.is-simple-symbol {
    display:inline !important;
    vertical-align:baseline !important;
    line-height:inherit !important;
  }
  #wordPresentationPresenter .mvip-interactive-live-mathtype.is-mathjax {
    display:inline !important;
    vertical-align:baseline !important;
    line-height:inherit !important;
  }
  #wordPresentationPresenter .mvip-interactive-live-mathtype-inner {
    display:inline !important;
    margin:0 !important;
    padding:0 !important;
    line-height:inherit !important;
  }
  #wordPresentationPresenter .mvip-interactive-live-mathtype-svg {
    border:0 !important;
    outline:0 !important;
    box-shadow:none !important;
    background:transparent !important;
    overflow:visible !important;
    /* Không đặt width/height/vertical-align ở đây:
       giữ nguyên thông số tự nhiên MathJax ghi trực tiếp trên SVG. */
  }
  /* Trình chiếu tài liệu Word dùng cùng MathType sống; không giữ bất kỳ hộp
     ảnh/OLE hay transform co giãn nào của nhánh cũ. */
  #wordPresentationPresenter .mvip-ordinary-live-mathtype {
    display:inline !important;
    width:auto !important;
    height:auto !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 .025em !important;
    padding:0 !important;
    border:0 !important;
    outline:0 !important;
    box-shadow:none !important;
    background:transparent !important;
    color:inherit !important;
    line-height:inherit !important;
    vertical-align:baseline !important;
    transform:none !important;
    position:static !important;
    overflow:visible !important;
    white-space:nowrap !important;
  }
  #wordPresentationPresenter .mvip-ordinary-live-mathtype .mvip-interactive-live-mathtype-inner,
  #wordPresentationPresenter .mvip-ordinary-live-mathtype .single-exam-mathjax-equation {
    display:inline !important;
    width:auto !important;
    height:auto !important;
    margin:0 !important;
    padding:0 !important;
    line-height:inherit !important;
    transform:none !important;
    position:static !important;
  }
  #wordPresentationPresenter .mvip-ordinary-live-mathtype svg {
    border:0 !important;
    outline:0 !important;
    box-shadow:none !important;
    background:transparent !important;
    overflow:visible !important;
  }

</style>

<style id="cv7991-choice-feedback-v17">
  /* Chỉ các hàng phương án/ý mới nhận thao tác bấm. */
  .word-presentation-items:not(.is-essay-parts) > .word-presentation-item,
  .single-exam-word-options > .single-exam-word-option,
  .single-exam-options-grid > .single-exam-option {
    cursor:pointer;
    transition:color .14s ease, background-color .14s ease, border-color .14s ease, box-shadow .14s ease;
  }

  /* MC có đáp án: đúng xanh, sai đỏ. MC chưa có đáp án: chỉ đổi chữ sang tím. */
  .word-presentation-item.is-manual-correct:not(.is-correct-answer):not(.is-wrong-answer):not(.is-scan-correct-answer):not(.has-answer-mark):not(.has-result-mark),
  .single-exam-word-option.is-manual-correct:not(.is-correct-answer):not(.is-wrong-answer) {
    background:#dcfce7 !important;
    border-color:#16a34a !important;
    box-shadow:inset 0 0 0 2px rgba(22,163,74,.18), 0 3px 10px rgba(22,163,74,.12) !important;
  }
  .word-presentation-item.is-manual-wrong:not(.is-correct-answer):not(.is-wrong-answer):not(.is-scan-correct-answer):not(.has-answer-mark):not(.has-result-mark),
  .single-exam-word-option.is-manual-wrong:not(.is-correct-answer):not(.is-wrong-answer) {
    background:#fee2e2 !important;
    border-color:#ef4444 !important;
    box-shadow:inset 0 0 0 2px rgba(239,68,68,.16), 0 3px 10px rgba(185,28,28,.10) !important;
  }
  .word-presentation-item.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer):not(.is-scan-correct-answer):not(.has-answer-mark):not(.has-result-mark),
  .single-exam-word-option.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer) {
    color:#7e22ce !important;
  }
  .word-presentation-item.is-manual-pending .word-presentation-item-label,
  .word-presentation-item.is-manual-pending .word-presentation-item-content,
  .word-presentation-item.is-manual-pending .word-presentation-item-flow,
  .word-presentation-item.is-manual-pending .single-exam-rich,
  .word-presentation-item.is-manual-pending .single-exam-rich *,
  .single-exam-word-option.is-manual-pending .single-exam-word-option-label,
  .single-exam-word-option.is-manual-pending .single-exam-word-option-body,
  .single-exam-word-option.is-manual-pending .single-exam-word-option-flow,
  .single-exam-word-option.is-manual-pending .single-exam-rich,
  .single-exam-word-option.is-manual-pending .single-exam-rich * {
    color:#7e22ce !important;
  }
  .single-exam-option.is-manual-correct:not(.is-correct-answer):not(.is-wrong-answer) {
    background:#16a34a !important; border-color:#22c55e !important;
    box-shadow:0 0 0 4px rgba(34,197,94,.24), 0 10px 24px rgba(22,101,52,.22) !important;
  }
  .single-exam-option.is-manual-wrong:not(.is-correct-answer):not(.is-wrong-answer) {
    background:#dc2626 !important; border-color:#f87171 !important;
    box-shadow:0 0 0 4px rgba(248,113,113,.22), 0 10px 24px rgba(127,29,29,.22) !important;
  }
  .single-exam-option.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer),
  .single-exam-option.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer) b,
  .single-exam-option.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer) .single-exam-rich,
  .single-exam-option.is-manual-pending:not(.is-correct-answer):not(.is-wrong-answer) .single-exam-rich * {
    color:#e879f9 !important;
  }

  /* Xem đáp án MC: toàn bộ đáp án đúng có nền xanh, toàn bộ đáp án sai có nền đỏ. */
  .word-presentation-item.is-correct-answer,
  .single-exam-word-option.is-correct-answer {
    background:#dcfce7 !important;
    border-color:#16a34a !important;
    color:#111827 !important;
    box-shadow:inset 0 0 0 2px rgba(22,163,74,.18) !important;
  }
  .word-presentation-item.is-wrong-answer,
  .single-exam-word-option.is-wrong-answer {
    background:#fee2e2 !important;
    border-color:#ef4444 !important;
    color:#111827 !important;
    box-shadow:inset 0 0 0 2px rgba(239,68,68,.16) !important;
  }
  .word-presentation-item.is-correct-answer .word-presentation-item-label,
  .word-presentation-item.is-wrong-answer .word-presentation-item-label,
  .single-exam-word-option.is-correct-answer .single-exam-word-option-label,
  .single-exam-word-option.is-wrong-answer .single-exam-word-option-label {
    color:#1d4ed8 !important;
  }
  .word-presentation-item.is-correct-answer .word-presentation-item-content,
  .word-presentation-item.is-wrong-answer .word-presentation-item-content,
  .word-presentation-item.is-correct-answer .single-exam-rich,
  .word-presentation-item.is-wrong-answer .single-exam-rich,
  .single-exam-word-option.is-correct-answer .single-exam-word-option-body,
  .single-exam-word-option.is-wrong-answer .single-exam-word-option-body {
    color:#111827 !important;
    font-weight:inherit !important;
  }
  .single-exam-option.is-correct-answer {
    background:#16a34a !important; border-color:#22c55e !important;
    box-shadow:0 0 0 4px rgba(34,197,94,.24), 0 12px 30px rgba(22,101,52,.24) !important;
  }
  .single-exam-option.is-wrong-answer {
    background:#b91c1c !important; border-color:#ef4444 !important;
    box-shadow:0 0 0 4px rgba(248,113,113,.28), 0 12px 30px rgba(127,29,29,.30) !important;
  }

  /* Đúng–Sai có đáp án: thêm Đ/S ở cuối ý. Chưa có đáp án: chỉ đổi chữ sang tím. */
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-selected,
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-correct,
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-wrong,
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-pending {
    box-shadow:none !important;
  }
  .word-presentation-items.is-statements .word-presentation-item.has-manual-mark {
    grid-template-columns:1.55em minmax(0,1fr) auto;
    column-gap:.18em;
  }
  .single-exam-word-option.has-manual-mark,
  .single-exam-option.has-manual-mark {
    display:flex !important;
    align-items:center !important;
  }
  .single-exam-option.has-manual-mark { justify-content:flex-start !important; }
  .single-exam-tf-manual-mark { margin-left:auto; flex:0 0 auto; }
  .word-presentation-item.has-answer-mark > .word-presentation-tf-manual-mark,
  .word-presentation-item.has-result-mark > .word-presentation-tf-manual-mark {
    display:none !important;
  }

  /* Xem toàn bộ vẫn thể hiện phản hồi MC rõ ràng nhưng không ép các ô bằng nhau. */
  .word-presentation-card.is-all-view .word-presentation-item.is-manual-correct,
  .word-presentation-card.is-all-view .word-presentation-item.is-manual-wrong,
  .word-presentation-card.is-all-view .word-presentation-item.is-correct-answer,
  .word-presentation-card.is-all-view .word-presentation-item.is-wrong-answer {
    border-width:2px !important;
    border-style:solid !important;
    border-radius:10px !important;
    padding:5px 9px !important;
  }
</style>

<style id="cv7991-mvip-word-display-sync-20260819">
  /* Dùng câu hỏi của MVIP dùng cùng giới hạn chiều rộng, xuống dòng và neo hình
     với Trình chiếu Word, kể cả phần đề bài ở phía trên vùng ảnh. */
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-question-prompt,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-items,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-content,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich {
    min-width:0 !important;
    max-width:100% !important;
    box-sizing:border-box !important;
  }
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-question-prompt,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-content,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich {
    white-space:normal !important;
    overflow-wrap:anywhere !important;
    word-break:break-word !important;
  }
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-question-prompt > .single-exam-rich *,
  #singleExamPresenter .single-exam-word-live-mode .regular-test-word-card.has-presentation-media .word-presentation-item-flow > .single-exam-rich * {
    max-width:100% !important;
  }
  #singleExamPresenter .regular-test-word-card.media-layout-figure .word-presentation-media-panel,
  #singleExamPresenter .regular-test-word-card.media-layout-mixed .word-presentation-media-panel {
    align-self:end !important;
    justify-self:end !important;
    align-items:flex-end !important;
    justify-content:flex-end !important;
  }
  #singleExamPresenter .regular-test-word-card.media-layout-figure .word-presentation-media-panel > img,
  #singleExamPresenter .regular-test-word-card.media-layout-figure .word-presentation-media-panel > canvas,
  #singleExamPresenter .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > img,
  #singleExamPresenter .regular-test-word-card.media-layout-mixed .word-presentation-media-panel > canvas {
    object-position:right bottom !important;
  }
</style>


<style id="word-presentation-question-picker-style-20260820">
  .word-presentation-choose-question-btn {
    min-width:88px !important;
    border-color:#7c3aed !important;
    background:#fff !important;
    color:#6d28d9 !important;
  }
  .word-presentation-choose-question-btn:hover:not(:disabled),
  .word-presentation-choose-question-btn[aria-expanded="true"] {
    border-color:#6d28d9 !important;
    background:#f5f3ff !important;
    color:#5b21b6 !important;
  }

  .word-presentation-question-picker-modal[hidden] { display:none !important; }
  .word-presentation-question-picker-modal {
    position:fixed;
    inset:0;
    z-index:125000;
    display:grid;
    place-items:center;
    box-sizing:border-box;
    padding:clamp(8px, 1.8vw, 22px);
    font-family:Arial, Helvetica, sans-serif;
  }
  .word-presentation-question-picker-backdrop {
    position:absolute;
    inset:0;
    background:rgba(15,23,42,.62);
    backdrop-filter:blur(2px);
  }
  .word-presentation-question-picker-dialog {
    position:relative;
    z-index:1;
    width:min(1240px, calc(100vw - 24px));
    max-height:calc(100vh - 24px);
    display:flex;
    flex-direction:column;
    overflow:hidden;
    border:1px solid #cbd5e1;
    border-radius:18px;
    background:#fff;
    color:#0f172a;
    box-shadow:0 28px 80px rgba(15,23,42,.38);
  }
  .word-presentation-question-picker-head {
    flex:0 0 auto;
    min-height:54px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:9px 12px 9px 16px;
    border-bottom:1px solid #dbe4f0;
    background:linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  }
  .word-presentation-question-picker-head-text { min-width:0; }
  .word-presentation-question-picker-head h3 {
    margin:0;
    font-size:21px;
    line-height:1.2;
    font-weight:900;
    color:#0f172a;
  }
  /* Người dùng chỉ cần nhìn tổng thể các nút câu, không cần dòng mô tả phụ. */
  .word-presentation-question-picker-summary { display:none !important; }
  .word-presentation-question-picker-close {
    flex:0 0 auto;
    min-height:34px;
    padding:0 13px;
    border:1px solid #ef4444;
    border-radius:10px;
    background:#fff;
    color:#b91c1c;
    font-size:14px;
    font-weight:900;
    cursor:pointer;
  }
  .word-presentation-question-picker-close:hover { background:#fef2f2; }

  .word-presentation-question-picker-grid-wrap {
    flex:1 1 auto;
    min-height:0;
    overflow-y:auto;
    overflow-x:hidden;
    overscroll-behavior:contain;
    scrollbar-gutter:stable;
    padding:14px;
    background:#f8fafc;
  }
  .word-presentation-question-picker-grid {
    display:grid;
    grid-template-columns:repeat(auto-fill, minmax(118px, 1fr));
    grid-auto-flow:row;
    align-content:start;
    gap:10px;
    width:100%;
    min-height:0;
  }
  .word-presentation-question-picker-item {
    min-width:0;
    min-height:48px;
    display:flex;
    align-items:center;
    justify-content:center;
    box-sizing:border-box;
    padding:8px 10px;
    border:1px solid #bfdbfe;
    border-radius:11px;
    background:#fff;
    color:#1d4ed8;
    font:inherit;
    font-size:15px;
    line-height:1.2;
    font-weight:900;
    text-align:center;
    white-space:normal;
    overflow-wrap:anywhere;
    cursor:pointer;
    box-shadow:0 1px 2px rgba(15,23,42,.06);
  }
  .word-presentation-question-picker-item:hover {
    border-color:#60a5fa;
    background:#eff6ff;
    color:#1e40af;
    transform:translateY(-1px);
  }
  .word-presentation-question-picker-item[aria-current="true"] {
    border-color:#2563eb;
    background:#dbeafe;
    color:#1e3a8a;
    box-shadow:inset 0 0 0 2px rgba(37,99,235,.15);
  }
  .word-presentation-question-picker-item.is-pptx-resume {
    border-color:#f59e0b;
    background:#fffbeb;
    color:#92400e;
    box-shadow:inset 0 0 0 2px rgba(245,158,11,.17);
  }
  .word-presentation-question-picker-item.is-pptx-resume:hover {
    border-color:#d97706;
    background:#fef3c7;
    color:#78350f;
  }
  .word-presentation-question-picker-item:focus-visible {
    outline:3px solid rgba(37,99,235,.38);
    outline-offset:2px;
  }
  .word-presentation-question-picker-empty {
    grid-column:1 / -1;
    padding:28px 16px;
    color:#64748b;
    font-size:15px;
    font-weight:800;
    text-align:center;
  }
  .word-presentation-question-picker-modal.is-powerpoint-picker .word-presentation-question-picker-grid {
    grid-template-columns:repeat(auto-fill, minmax(190px, 1fr));
    gap:13px;
  }
  .word-presentation-question-picker-modal.is-powerpoint-picker .word-presentation-question-picker-item {
    min-height:132px;
    flex-direction:column;
    gap:7px;
    padding:7px;
  }
  .word-presentation-slide-thumbnail {
    width:100%;
    aspect-ratio:var(--pptx-slide-aspect, 16 / 9);
    display:block;
    overflow:hidden;
    border:1px solid #cbd5e1;
    border-radius:7px;
    background:linear-gradient(135deg,#e2e8f0,#f8fafc);
    object-fit:contain;
  }
  .word-presentation-slide-thumbnail.is-loading {
    display:grid;
    place-items:center;
    color:#64748b;
    font-size:12px;
    font-weight:800;
  }
  .word-presentation-slide-number { line-height:1; }

  @media (max-width:700px) {
    .word-presentation-question-picker-modal { padding:5px; }
    .word-presentation-question-picker-dialog {
      width:calc(100vw - 10px);
      max-height:calc(100vh - 10px);
      border-radius:13px;
    }
    .word-presentation-question-picker-head { min-height:50px; padding:7px 8px 7px 11px; }
    .word-presentation-question-picker-head h3 { font-size:18px; }
    .word-presentation-question-picker-grid-wrap { padding:8px; }
    .word-presentation-question-picker-grid {
      grid-template-columns:repeat(auto-fill, minmax(100px, 1fr));
      gap:7px;
    }
    .word-presentation-question-picker-item {
      min-height:44px;
      padding:7px 8px;
      font-size:14px;
      border-radius:9px;
    }
    .word-presentation-question-picker-modal.is-powerpoint-picker .word-presentation-question-picker-grid {
      grid-template-columns:repeat(auto-fill, minmax(140px, 1fr));
    }
    .word-presentation-question-picker-modal.is-powerpoint-picker .word-presentation-question-picker-item {
      min-height:104px;
    }
  }
</style>


<style id="cv7991-choice-check-and-answer-flash-20260820">
  /* Mỗi hàng lựa chọn có một nút tích ở mép phải. Bấm hàng hoặc nút chỉ thay đổi
     dấu tích; chữ, nền và viền của hàng giữ nguyên. */
  .cv7991-choice-check-btn {
    flex:0 0 auto;
    align-self:center;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:clamp(32px, 1.08em, 50px);
    height:clamp(32px, 1.08em, 50px);
    min-width:32px;
    min-height:32px;
    margin-left:.38em;
    padding:0;
    border:2px solid #94a3b8;
    border-radius:10px;
    background:#fff;
    color:#2563eb;
    box-shadow:none;
    cursor:pointer;
    font-family:Arial, Helvetica, sans-serif;
    font-size:clamp(20px, .62em, 34px);
    font-weight:1000;
    line-height:1;
    text-shadow:none;
    transition:border-color .12s ease, background-color .12s ease, box-shadow .12s ease;
  }
  .cv7991-choice-check-btn > span {
    display:block;
    opacity:0;
    transform:scale(.72);
    transition:opacity .1s ease, transform .1s ease;
  }
  .cv7991-choice-check-btn.is-checked,
  .cv7991-choice-check-btn[aria-pressed="true"] {
    border-color:#2563eb;
    background:#eff6ff;
    box-shadow:inset 0 0 0 2px rgba(37,99,235,.12);
  }
  .cv7991-choice-check-btn.is-checked > span,
  .cv7991-choice-check-btn[aria-pressed="true"] > span {
    opacity:1;
    transform:scale(1);
  }
  .cv7991-choice-check-btn:focus-visible {
    outline:3px solid rgba(37,99,235,.38);
    outline-offset:2px;
  }

  /* Word/MVIP dạng thẻ Word dùng thêm một cột cho nút tích. */
  .word-presentation-item.cv7991-has-choice-check {
    grid-template-columns:1.7em minmax(0,1fr) auto !important;
  }
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check {
    grid-template-columns:1.55em minmax(0,1fr) auto !important;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view)
    .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-scan-control {
    grid-template-columns:auto 1.55em minmax(0,1fr) auto !important;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view)
    .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-scan-result,
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-result-mark,
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-answer-mark {
    grid-template-columns:1.55em minmax(0,1fr) auto auto !important;
  }
  .single-exam-word-option.cv7991-has-choice-check {
    display:flex !important;
    align-items:center !important;
  }
  .single-exam-word-option.cv7991-has-choice-check .single-exam-word-option-body {
    flex:1 1 auto !important;
    min-width:0 !important;
  }
  .single-exam-option.cv7991-has-choice-check {
    display:flex !important;
    align-items:center !important;
    justify-content:flex-start !important;
  }
  .single-exam-option.cv7991-has-choice-check > span:first-child {
    flex:1 1 auto;
    min-width:0;
    text-align:center;
  }

  /* Bấm lựa chọn không được đổi màu chữ/nền/viền của hàng. Các lớp phản hồi cũ
     được trung hòa; chỉ nút tích bên phải biểu thị trạng thái đã chọn. */
  .word-presentation-item.is-manual-correct:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .word-presentation-item.is-manual-wrong:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .word-presentation-item.is-manual-pending:not(.cv7991-answer-correct):not(.cv7991-answer-wrong) {
    background:#fbfdff !important;
    border-color:#dbe4f0 !important;
    color:inherit !important;
    box-shadow:none !important;
  }
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-correct:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-wrong:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .word-presentation-items.is-statements > .word-presentation-item.is-manual-pending:not(.cv7991-answer-correct):not(.cv7991-answer-wrong) {
    background:#fff !important;
  }
  .single-exam-word-option.is-manual-correct:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .single-exam-word-option.is-manual-wrong:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .single-exam-word-option.is-manual-pending:not(.cv7991-answer-correct):not(.cv7991-answer-wrong) {
    background:transparent !important;
    color:inherit !important;
    box-shadow:none !important;
  }
  .single-exam-option.is-manual-correct:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .single-exam-option.is-manual-wrong:not(.cv7991-answer-correct):not(.cv7991-answer-wrong),
  .single-exam-option.is-manual-pending:not(.cv7991-answer-correct):not(.cv7991-answer-wrong) {
    background:rgba(255,255,255,.12) !important;
    border-color:#22c55e !important;
    color:#fff !important;
    box-shadow:none !important;
  }
  /* Không dùng Đ/S cho thao tác chọn tay hoặc Xem đáp án. Dấu kết quả quét riêng
     của chế độ quét thẻ vẫn được giữ nguyên. */
  .word-presentation-tf-manual-mark,
  .word-presentation-tf-answer-mark,
  .single-exam-tf-manual-mark,
  .single-exam-tf-answer-mark {
    display:none !important;
  }

  /* Câu nhiều lựa chọn: nháy ba lần rồi giữ màu xanh của đáp án đúng. */
  @keyframes cv7991-correct-answer-green-blink {
    0%, 100% { background-color:#bbf7d0; }
    50% { background-color:var(--cv7991-neutral-choice-bg, #fff); }
  }
  .word-presentation-item { --cv7991-neutral-choice-bg:#fbfdff; }
  .word-presentation-items.is-statements > .word-presentation-item { --cv7991-neutral-choice-bg:#fff; }
  .single-exam-word-option { --cv7991-neutral-choice-bg:transparent; }
  .single-exam-option { --cv7991-neutral-choice-bg:rgba(255,255,255,.12); }

  .word-presentation-item.cv7991-answer-correct,
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-answer-correct,
  .single-exam-word-option.cv7991-answer-correct {
    background:#bbf7d0;
    border-color:#16a34a !important;
    color:inherit !important;
    box-shadow:inset 0 0 0 2px rgba(22,163,74,.16) !important;
  }
  .single-exam-option.cv7991-answer-correct {
    background:#16a34a;
    border-color:#22c55e !important;
    color:#fff !important;
    box-shadow:0 0 0 4px rgba(34,197,94,.20) !important;
  }
  .cv7991-answer-correct.cv7991-answer-flash {
    animation-name:cv7991-correct-answer-green-blink !important;
    animation-duration:.52s !important;
    animation-timing-function:ease-in-out !important;
    animation-iteration-count:3 !important;
    animation-fill-mode:both !important;
  }
</style>


<style id="cv7991-true-false-two-choice-buttons-20260821">
  .cv7991-tf-choice-group {
    flex:0 0 auto;
    align-self:center;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:clamp(5px, .18em, 9px);
    margin-left:.38em;
  }
  .cv7991-tf-choice-btn {
    position:relative;
    overflow:visible;
    flex:0 0 auto;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:clamp(32px, 1.08em, 50px);
    height:clamp(32px, 1.08em, 50px);
    min-width:32px;
    min-height:32px;
    padding:0;
    border:2px solid currentColor;
    border-radius:10px;
    background:#fff;
    box-shadow:none;
    cursor:pointer;
    font-family:Arial, Helvetica, sans-serif;
    font-size:clamp(15px, .48em, 25px);
    font-weight:1000;
    line-height:1;
    transition:background-color .12s ease, color .12s ease, box-shadow .12s ease, transform .12s ease;
  }
  .cv7991-tf-choice-btn.is-true {
    color:#15803d;
    border-color:#16a34a;
    background:#fff;
  }
  .cv7991-tf-choice-btn.is-false {
    color:#b91c1c;
    border-color:#dc2626;
    background:#fff;
  }
  .cv7991-tf-choice-btn.is-true[aria-pressed="true"],
  .cv7991-tf-choice-btn.is-true.is-checked {
    color:#fff;
    background:#16a34a;
    box-shadow:inset 0 0 0 2px rgba(255,255,255,.28), 0 0 0 3px rgba(22,163,74,.15);
  }
  .cv7991-tf-choice-btn.is-false[aria-pressed="true"],
  .cv7991-tf-choice-btn.is-false.is-checked {
    color:#fff;
    background:#dc2626;
    box-shadow:inset 0 0 0 2px rgba(255,255,255,.28), 0 0 0 3px rgba(220,38,38,.15);
  }
  .cv7991-tf-choice-btn:hover:not(:disabled) { transform:translateY(-1px); }
  .cv7991-tf-choice-btn:disabled { opacity:1; cursor:default; }
  /* Câu đúng–sai: chỉ gạch nút học sinh chọn sai; giữ nguyên nền hàng và nút. */
  .cv7991-tf-choice-btn.cv7991-tf-choice-wrong[aria-pressed="true"]::after {
    content:"";
    position:absolute;
    left:50%;
    top:50%;
    width:170%;
    height:clamp(2px, .12em, 3px);
    border-radius:999px;
    background:#ff0000;
    box-shadow:0 0 0 1px rgba(255,255,255,.9);
    transform:translate(-50%, -50%) rotate(-54deg);
    pointer-events:none;
    z-index:2;
  }
  .cv7991-tf-choice-btn:focus-visible {
    outline:3px solid rgba(37,99,235,.38);
    outline-offset:2px;
  }
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check {
    grid-template-columns:1.55em minmax(0,1fr) auto !important;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view)
    .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-scan-control {
    grid-template-columns:auto 1.55em minmax(0,1fr) auto !important;
  }
  .word-presentation-presenter.wp-scan-authorized:not(.is-all-view)
    .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-scan-result,
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-result-mark,
  .word-presentation-items.is-statements > .word-presentation-item.cv7991-has-choice-check.has-answer-mark {
    grid-template-columns:1.55em minmax(0,1fr) auto auto !important;
  }
  @media (max-width:640px) {
    .cv7991-tf-choice-group { gap:4px; margin-left:.2em; }
    .cv7991-tf-choice-btn {
      width:30px;
      height:30px;
      min-width:30px;
      min-height:30px;
      border-radius:8px;
      font-size:14px;
    }
  }
</style>


<style id="cv7991-ndtc-title-centered-20260821">
  /* Tiêu đề NDTC là đoạn văn đầu tiên sau mốc NDTC. Đặt riêng, căn giữa,
     không ghép cùng nội dung giống kiểu “Câu 1.” của tài liệu thông thường. */
  .word-presentation-question-line.is-ndtc-question-line {
    display:block !important;
    width:100% !important;
    min-width:0 !important;
  }
  .word-presentation-question-line.is-ndtc-question-line > .word-presentation-ndtc-title {
    display:block !important;
    width:100% !important;
    box-sizing:border-box !important;
    margin:0 0 .42em !important;
    padding:0 .35em !important;
    white-space:normal !important;
    text-align:center !important;
    line-height:1.16 !important;
    color:#1d4ed8 !important;
    font-weight:800 !important;
  }
  .word-presentation-question-line.is-ndtc-question-line > .word-presentation-question-prompt {
    display:block !important;
    width:100% !important;
    min-width:0 !important;
    text-align:left !important;
  }
  .word-presentation-question-line.is-ndtc-question-line > .word-presentation-question-prompt:empty::after {
    content:none !important;
  }
  .word-presentation-question-line.is-promptless-items > .word-presentation-question-prompt {
    display:none !important;
  }
  .word-presentation-question-line.is-promptless-items > .word-presentation-question-prompt:empty::after {
    content:none !important;
  }
  .word-presentation-card.is-all-view .word-presentation-question-line.is-ndtc-question-line > .word-presentation-ndtc-title {
    margin-bottom:.32em !important;
  }
</style>


<style id="cv7991-word-paragraph-indent-left-20260822">
  /* Mỗi đoạn văn bản trong phần trình chiếu vẫn mở đầu bằng đúng hai khoảng
     trắng không ngắt dòng (được chèn khi dựng HTML), nhưng căn trái thay vì
     căn đều hai lề. Tiêu đề NDTC vẫn là một đoạn riêng, căn giữa và không
     thụt đầu dòng. */
  .word-presentation-question-line:not(.is-ndtc-question-line) {
    text-align:left !important;
  }
  .word-presentation-question-prompt > .cv7991-presentation-text-paragraph,
  .word-presentation-answer-content .cv7991-presentation-text-paragraph {
    display:block;
    width:100%;
    min-width:0;
    box-sizing:border-box;
    margin:0 0 .18em 0;
    padding:0;
    text-align:left !important;
    white-space:normal;
  }
  .word-presentation-question-prompt > .cv7991-presentation-text-paragraph:last-child,
  .word-presentation-answer-content .cv7991-presentation-text-paragraph:last-child {
    margin-bottom:0;
  }
  /* Câu Word thông thường vẫn giữ “Câu n.” và đoạn đầu trên cùng một dòng. */
  .word-presentation-question-line:not(.is-ndtc-question-line)
  > .word-presentation-question-prompt
  > .cv7991-presentation-text-paragraph.is-first-inline {
    display:inline;
    width:auto;
    margin:0;
  }
  .word-presentation-question-line.is-ndtc-question-line
  > .word-presentation-question-prompt {
    text-align:left !important;
  }
  /* Hình, biểu đồ và bảng đứng riêng không phải đoạn văn bản nên không chèn
     khoảng trắng; tiếp tục căn giữa như trước. */
  .word-presentation-question-prompt > .cv7991-presentation-visual-paragraph,
  .word-presentation-answer-content .cv7991-presentation-visual-paragraph {
    display:block;
    width:100%;
    min-width:0;
    box-sizing:border-box;
    margin:.12em 0 .22em;
    padding:0;
    text-align:center !important;
    text-indent:0 !important;
  }
  .word-presentation-question-prompt > .cv7991-presentation-visual-paragraph:last-child,
  .word-presentation-answer-content .cv7991-presentation-visual-paragraph:last-child {
    margin-bottom:0;
  }
</style>

<style id="ordinary-document-presentation-style-20260827">
  .word-presentation-presenter.is-ordinary-document #wordPresentationAnswerBtn,
  .word-presentation-presenter.is-ordinary-document #wordPresentationAllBtn,
  .word-presentation-presenter.is-ordinary-document #wordPresentationChooseQuestionBtn,
  .word-presentation-presenter.is-ordinary-document #wordPresentationCountdownInput,
  .word-presentation-presenter.is-ordinary-document #wordPresentationScanTools,
  .word-presentation-presenter.is-ordinary-document #wordPresentationResultBtn,
  .word-presentation-presenter.is-ordinary-document #wordPresentationHttcBadge,
  .word-presentation-presenter.is-ordinary-document #wordPresentationAccessBanner,
  .word-presentation-presenter.is-ordinary-document #lessonPlanCheckMoreBtn {
    display:none !important;
  }
  .word-presentation-presenter.is-ordinary-document .word-presentation-viewport {
    display:block !important;
    overflow:auto !important;
    padding:0 !important;
    box-sizing:border-box !important;
    background:#475569 !important;
    scroll-behavior:smooth;
    overscroll-behavior:contain;
    touch-action:none;
  }
  .word-presentation-presenter.is-ordinary-document:not(.is-ink-active)
    .word-presentation-viewport.is-ordinary-zoomed:not(.word-presentation-region-selecting) {
    cursor:grab;
  }
  .word-presentation-presenter.is-ordinary-document
    .word-presentation-viewport.is-ordinary-panning {
    cursor:grabbing !important;
    user-select:none !important;
    -webkit-user-select:none !important;
    scroll-behavior:auto;
  }
  .word-presentation-presenter.is-ordinary-document .word-presentation-fit-layer {
    position:relative !important;
    left:auto !important;
    top:auto !important;
    width:100% !important;
    min-width:0 !important;
    max-width:none !important;
    height:auto !important;
    min-height:100% !important;
    max-height:none !important;
    transform:none !important;
    transform-origin:top left !important;
    display:flex !important;
    align-items:flex-start !important;
    justify-content:center !important;
  }
  .word-presentation-presenter.is-ordinary-document .word-presentation-card.ordinary-document-card {
    position:relative !important;
    width:100% !important;
    min-width:0 !important;
    max-width:none !important;
    height:auto !important;
    min-height:100% !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    color:#0f172a !important;
    box-shadow:none !important;
    overflow:visible !important;
    font-size:16px !important;
    display:flex !important;
    align-items:stretch !important;
    justify-content:flex-start !important;
  }
  .ordinary-document-loading,
  .ordinary-document-error {
    align-self:center;
    width:min(680px, calc(100% - 28px));
    margin:auto;
    padding:24px;
    box-sizing:border-box;
    border-radius:16px;
    background:#fff;
    color:#0f172a;
    text-align:center;
    font-size:20px;
    font-weight:800;
    line-height:1.5;
    box-shadow:0 18px 50px rgba(15,23,42,.28);
  }
  .ordinary-document-page-host {
    position:relative;
    width:100%;
    min-width:0;
    min-height:100%;
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
  }
  .ordinary-pdf-page-stage,
  .ordinary-docx-render,
  .ordinary-xlsx-render,
  .ordinary-pptx-render {
    position:relative;
    width:100%;
    min-width:0;
    flex:0 0 auto;
    margin:0 auto;
  }
  .ordinary-xlsx-render,
  .ordinary-pptx-render {
    transform-origin:top left;
    background:#fff;
  }
  .ordinary-xlsx-render {
    width:max-content;
    min-width:0;
  }
  .ordinary-xlsx-sheet {
    position:relative;
    width:max-content;
    min-width:0;
    box-sizing:border-box;
    padding:16px;
    background:#fff;
    color:#0f172a;
    overflow:visible;
  }
  .ordinary-xlsx-sheet[hidden] {
    display:none !important;
  }
  .word-presentation-presenter.is-ordinary-document.has-xlsx-sheet-tabs
    > .word-presentation-viewport {
    /* Thanh chọn sheet nằm tuyệt đối ở đáy. Dùng margin để thu ngắn viewport
       thật sự; padding chỉ đẩy nội dung nhưng vẫn để thanh cuộn ngang nằm bên
       dưới và bị thanh sheet che mất. */
    margin-bottom:44px !important;
    padding-bottom:0 !important;
    overflow-x:scroll !important;
    overflow-y:auto !important;
    scrollbar-gutter:stable;
    scrollbar-width:auto;
    scrollbar-color:#64748b #e2e8f0;
  }
  .word-presentation-presenter.is-ordinary-document.has-xlsx-sheet-tabs
    > .word-presentation-viewport::-webkit-scrollbar {
    width:14px;
    height:14px;
  }
  .word-presentation-presenter.is-ordinary-document.has-xlsx-sheet-tabs
    > .word-presentation-viewport::-webkit-scrollbar-track {
    background:#e2e8f0;
    border-top:1px solid #cbd5e1;
  }
  .word-presentation-presenter.is-ordinary-document.has-xlsx-sheet-tabs
    > .word-presentation-viewport::-webkit-scrollbar-thumb {
    min-width:42px;
    border:3px solid #e2e8f0;
    border-radius:999px;
    background:#64748b;
  }
  .word-presentation-presenter.is-ordinary-document.has-xlsx-sheet-tabs
    > .word-presentation-viewport::-webkit-scrollbar-thumb:hover {
    background:#475569;
  }
  .ordinary-xlsx-sheet-tabs {
    position:absolute;
    left:0;
    right:0;
    bottom:0;
    z-index:1280;
    height:44px;
    min-width:0;
    box-sizing:border-box;
    display:flex;
    align-items:flex-end;
    gap:2px;
    padding:5px 10px 4px;
    overflow-x:auto;
    overflow-y:hidden;
    scrollbar-width:thin;
    border-top:1px solid #94a3b8;
    background:#e2e8f0;
    box-shadow:0 -3px 12px rgba(15,23,42,.14);
  }
  .ordinary-xlsx-sheet-tabs[hidden] {
    display:none !important;
  }
  .ordinary-xlsx-sheet-tab {
    flex:0 0 auto;
    min-width:78px;
    max-width:240px;
    height:34px;
    box-sizing:border-box;
    padding:0 15px;
    overflow:hidden;
    border:1px solid #94a3b8;
    border-bottom-color:#64748b;
    border-radius:7px 7px 2px 2px;
    background:#f8fafc;
    color:#334155;
    font:700 13px/1 Arial, Helvetica, sans-serif;
    text-align:center;
    text-overflow:ellipsis;
    white-space:nowrap;
    cursor:pointer;
  }
  .ordinary-xlsx-sheet-tab:hover {
    background:#fff;
    color:#0f172a;
  }
  .ordinary-xlsx-sheet-tab[aria-selected="true"] {
    border-color:#15803d;
    border-bottom:3px solid #15803d;
    background:#fff;
    color:#166534;
    font-weight:900;
  }
  .ordinary-xlsx-sheet-tab:focus-visible {
    outline:3px solid rgba(37,99,235,.34);
    outline-offset:1px;
  }
  .ordinary-xlsx-sheet table {
    border-collapse:collapse;
    table-layout:fixed;
    width:max-content;
    min-width:0;
    background:#fff;
    color:#0f172a;
    font:14px/1.35 Arial, sans-serif;
  }
  .ordinary-xlsx-grid {
    position:relative;
    display:grid;
    grid-auto-flow:row;
    gap:0;
    min-width:0;
    min-height:0;
    box-sizing:border-box;
    overflow:visible;
    background:#fff;
    color:#0f172a;
    font:14px/1.35 Arial, sans-serif;
  }
  .ordinary-xlsx-cell {
    position:relative;
    z-index:1;
    min-width:0;
    min-height:0;
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:flex-start;
    margin-right:-1px;
    margin-bottom:-1px;
    padding:2px 4px;
    overflow:hidden;
    background:#fff;
    color:#0f172a;
    white-space:nowrap;
    overflow-wrap:normal;
  }
  /* Đường lưới mặc định của Excel không phải border định dạng của ô. Dùng
     inset shadow để chúng vẫn hiện khi style XML khai báo "không viền", còn
     border thật của bảng/ô vẫn được vẽ nổi phía trên với đúng độ đậm. */
  .ordinary-xlsx-grid.shows-gridlines .ordinary-xlsx-cell {
    box-shadow:inset -1px 0 #d9d9d9, inset 0 -1px #d9d9d9;
  }
  .ordinary-xlsx-cell-content {
    display:block;
    width:100%;
    min-width:0;
    max-width:100%;
    max-height:100%;
    box-sizing:border-box;
    overflow:hidden;
    color:inherit;
    font:inherit;
    text-align:inherit;
    white-space:inherit;
    overflow-wrap:inherit;
  }
  .ordinary-xlsx-cell.is-xlsx-text-overflow {
    z-index:4;
    overflow:visible;
  }
  .ordinary-xlsx-cell.is-xlsx-text-overflow .ordinary-xlsx-cell-content {
    flex:0 0 auto;
    max-width:none;
    overflow:visible;
  }
  /* Word và Excel dùng cùng một lớp hình học như PowerPoint: mỗi đối tượng có
     hộp riêng, tọa độ tuyệt đối, kích thước nguồn và thứ tự trước/sau. Lớp này
     đứng ngoài thuật toán dàn chữ/bảng nên trình duyệt không được phép tự đẩy
     shape, ảnh hoặc biểu đồ sang vị trí khác. */
  .mvip-office-object-layer {
    position:absolute !important;
    left:0 !important;
    top:0 !important;
    z-index:32;
    width:100% !important;
    height:100% !important;
    overflow:visible !important;
    pointer-events:none !important;
    transform:none !important;
    transform-origin:top left !important;
  }
  .mvip-office-object-layer.is-behind-text { z-index:0; }
  .mvip-office-object {
    position:absolute !important;
    display:block !important;
    min-width:1px !important;
    min-height:1px !important;
    box-sizing:border-box !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    background:transparent !important;
    overflow:visible !important;
    pointer-events:none !important;
    transform-origin:center center !important;
  }
  .mvip-office-object > svg,
  .mvip-office-object > img,
  .mvip-office-object > .single-exam-word-group-figure,
  .mvip-office-object > .single-exam-word-group-figure > svg {
    position:static !important;
    display:block !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    object-fit:fill;
    overflow:visible !important;
  }
  /* Shape Office là đối tượng vector độc lập, không phải ảnh minh họa. Giữ
     nguyên từng path/lớp hình học và vô hiệu mọi kiểu khung phóng-to ảnh. */
  .mvip-office-vector-shape,
  .mvip-office-vector-group,
  .mvip-office-vector-shape.cv7991-presentation-image-frame,
  .mvip-office-vector-group.cv7991-presentation-image-frame {
    border:0 !important;
    border-radius:0 !important;
    outline:0 !important;
    outline-offset:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    filter:none !important;
    cursor:default !important;
  }
  /* Trong trình chiếu Word/Excel thông thường, không đối tượng nào là nút
     “Hình ảnh phóng to”. Khóa cả kiểu khung trong khoảng ngắn trước khi bộ
     quan sát DOM kịp gỡ các thuộc tính phóng-to cũ. */
  #wordPresentationPresenter.is-ordinary-document .ordinary-docx-render .cv7991-presentation-image-frame,
  #wordPresentationPresenter.is-ordinary-document .ordinary-docx-render .word-presentation-direct-zoom,
  #wordPresentationPresenter.is-ordinary-document .ordinary-xlsx-render .cv7991-presentation-image-frame,
  #wordPresentationPresenter.is-ordinary-document .ordinary-xlsx-render .word-presentation-direct-zoom {
    border:0 !important;
    border-radius:0 !important;
    outline:0 !important;
    outline-offset:0 !important;
    box-shadow:none !important;
    filter:none !important;
    cursor:default !important;
  }
  .mvip-office-inline-object {
    position:relative !important;
    display:inline-block !important;
    box-sizing:border-box !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    background:transparent !important;
    line-height:0 !important;
    vertical-align:baseline !important;
    overflow:visible !important;
  }
  .mvip-office-inline-object.is-word-paragraph-anchor {
    vertical-align:top !important;
  }
  /* Nhóm Shapes neo cùng một đoạn có chữ (ví dụ hình ở Câu 4) dùng marker
     nội dòng để docx-preview không loại bookmark rỗng, nhưng bản thân hình
     vẫn phải là lớp phủ tuyệt đối như Word và không chiếm chỗ của văn bản. */
  .mvip-office-inline-object.is-word-overlay-anchor {
    position:absolute !important;
    display:block !important;
    margin:0 !important;
    vertical-align:top !important;
    z-index:40;
  }
  /* Ảnh neo có wrapSquare/wrapTight phải tham gia dàn chữ như một float.
     Nếu đưa vào lớp tuyệt đối, đoạn chữ vẫn chiếm toàn chiều rộng rồi bị ảnh
     phủ lên. Các khoảng cách cụ thể tiếp tục lấy từ distT/B/L/R của Word. */
  .mvip-office-inline-object.is-word-text-wrap-anchor {
    position:relative !important;
    display:block !important;
    vertical-align:top !important;
    line-height:0 !important;
    overflow:visible !important;
  }
  /* Keep bothSides anchors on their source paragraph coordinates, independent
     of line flow; word-boundary spacers reserve only the picture's rectangle. */
  .mvip-office-inline-object.is-word-text-wrap-anchor.is-word-both-sides-anchor {
    position:absolute !important; display:block !important; float:none !important;
    clear:none !important; margin:0 !important; z-index:40;
  }
  .mvip-office-inline-object > svg,
  .mvip-office-inline-object > img,
  .mvip-office-inline-object > .single-exam-word-group-figure,
  .mvip-office-inline-object > .single-exam-word-group-figure > svg {
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    overflow:visible !important;
  }
  .mvip-office-textbox-table {
    display:block !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    margin:0 !important;
    padding:0 !important;
    box-sizing:border-box !important;
    overflow:visible !important;
    background:transparent !important;
    color:#111 !important;
    font-family:'Times New Roman', Times, serif !important;
    line-height:1 !important;
  }
  .mvip-office-textbox-table .single-exam-inline-table {
    width:100% !important;
    height:100% !important;
    max-width:none !important;
    margin:0 !important;
    padding:0 !important;
    border-collapse:collapse !important;
    table-layout:fixed !important;
    background:transparent !important;
    color:#111 !important;
    font-size:12pt !important;
    line-height:1 !important;
  }
  .mvip-office-textbox-table .single-exam-inline-table > tbody {
    height:100% !important;
  }
  .mvip-office-textbox-table .single-exam-inline-table > tbody > tr {
    height:auto;
  }
  .mvip-office-textbox-table .single-exam-inline-table td,
  .mvip-office-textbox-table .single-exam-inline-table th {
    min-width:0 !important;
    padding:0 1px !important;
    box-sizing:border-box !important;
    vertical-align:top;
    background:transparent !important;
    color:#111 !important;
    font-size:12pt !important;
    line-height:1 !important;
    overflow:visible !important;
  }
  .mvip-office-textbox-table .cv7991-word-table-paragraph {
    margin:0 !important;
    padding:0 !important;
    line-height:1 !important;
    white-space:nowrap !important;
    font-size:12pt !important;
  }
  .mvip-office-textbox-table .mvip-ordinary-live-mathtype,
  .mvip-office-textbox-table .mvip-interactive-live-mathtype {
    font-size:1em !important;
    line-height:1 !important;
    margin:0 !important;
    padding:0 !important;
    vertical-align:baseline !important;
  }
  .ordinary-xlsx-grid > .mvip-office-object-layer {
    z-index:40;
    grid-column:1 / -1;
    grid-row:1 / -1;
  }
  .ordinary-docx-render section.docx > .mvip-office-object-layer {
    z-index:40;
  }
  /* SVG của v:line chỉ là một nét trang trí Word, không phải hình ảnh để
     đóng khung hay phóng to. Khóa lớp trình bày để viền khung không biến
     thành các đường ngang dài bao quanh nét gốc. */
  #wordPresentationPresenter .ordinary-docx-render svg.mvip-word-native-line,
  #wordPresentationPresenter .ordinary-docx-render svg.mvip-word-native-line:hover,
  #wordPresentationPresenter .ordinary-docx-render svg.mvip-word-native-line:focus-visible {
    border:0 !important;
    border-radius:0 !important;
    outline:0 !important;
    outline-offset:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    filter:none !important;
    cursor:default !important;
    pointer-events:none !important;
    transition:none !important;
  }
  .ordinary-xlsx-sheet td,
  .ordinary-xlsx-sheet th {
    min-width:0;
    height:auto;
    padding:2px 4px;
    box-sizing:border-box;
    border:0;
    background:#fff;
    color:#0f172a;
    vertical-align:middle;
    white-space:nowrap;
    overflow:hidden;
    overflow-wrap:normal;
  }
  .ordinary-pptx-render [data-slide-index] {
    position:relative;
    width:100% !important;
    box-sizing:border-box;
    margin-left:auto !important;
    margin-right:auto !important;
    box-shadow:0 1px 0 #0f172a;
  }
  .ordinary-pptx-render [data-slide-index] > :first-child {
    margin-left:auto;
    margin-right:auto;
  }
  .word-presentation-presenter.is-powerpoint-slide-mode .word-presentation-viewport {
    background:#111827 !important;
  }
  .powerpoint-presentation-controls[hidden] { display:none !important; }
  /* Các nút chuyển slide/toàn màn hình đã có trên thanh công cụ phía trên. */
  .powerpoint-presentation-controls { display:none !important; }
  .powerpoint-presentation-controls {
    position:absolute;
    left:50%;
    bottom:max(14px, env(safe-area-inset-bottom));
    z-index:1250;
    min-height:46px;
    max-width:calc(100vw - 28px);
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:5px;
    padding:5px 7px;
    border:1px solid rgba(255,255,255,.22);
    border-radius:14px;
    background:rgba(15,23,42,.82);
    color:#fff;
    box-shadow:0 12px 36px rgba(0,0,0,.34);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    transform:translateX(-50%);
    opacity:.72;
    transition:opacity .16s ease, background .16s ease;
  }
  .powerpoint-presentation-controls:hover,
  .powerpoint-presentation-controls:focus-within {
    opacity:1;
    background:rgba(15,23,42,.94);
  }
  .powerpoint-presentation-controls button {
    width:36px;
    min-width:36px;
    height:36px;
    min-height:36px;
    box-sizing:border-box;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:0;
    border:1px solid rgba(255,255,255,.2);
    border-radius:10px;
    background:rgba(255,255,255,.08);
    color:#fff;
    font:900 21px/1 Arial, Helvetica, sans-serif;
    cursor:pointer;
  }
  .powerpoint-presentation-controls button:hover:not(:disabled),
  .powerpoint-presentation-controls button:focus-visible {
    border-color:rgba(255,255,255,.62);
    background:rgba(255,255,255,.2);
    outline:none;
  }
  .powerpoint-presentation-controls button:disabled {
    opacity:.34;
    cursor:not-allowed;
  }
  .powerpoint-presentation-controls .powerpoint-presentation-play-btn {
    border-color:rgba(96,165,250,.62);
    background:rgba(37,99,235,.4);
    font-size:17px;
  }
  .powerpoint-presentation-controls .powerpoint-presentation-play-btn[aria-pressed="true"] {
    border-color:#93c5fd;
    background:#2563eb;
  }
  .powerpoint-presentation-controls .powerpoint-presentation-counter {
    min-width:76px;
    padding:0 7px;
    color:#f8fafc;
    font:800 13px/1 Arial, Helvetica, sans-serif;
    text-align:center;
    white-space:nowrap;
    font-variant-numeric:tabular-nums;
  }
  .powerpoint-presentation-controls .powerpoint-presentation-close-btn {
    border-color:rgba(248,113,113,.62);
    color:#fecaca;
  }
  /* PowerPoint dùng lại các công cụ thao tác màn chiếu của trình chiếu Word.
     Chỉ các lớp riêng của câu hỏi Word vẫn được giấu; trạng thái từng nút được
     đồng bộ ở bản vá công cụ PowerPoint phía cuối tệp. */
  .word-presentation-presenter.is-powerpoint-slide-mode > #wordPresentationAccessBanner,
  .word-presentation-presenter.is-powerpoint-slide-mode > #wordPresentationQuestionPickerModal {
    display:none !important;
    pointer-events:none !important;
  }
  .word-presentation-presenter.is-powerpoint-slide-mode .word-presentation-viewport {
    flex:1 1 100% !important;
  }
  /* Ngoài chế độ bảng trắng chia đôi, viewport PowerPoint luôn phải giãn hết
     presenter hiện tại. Quy tắc này loại bỏ bề rộng còn sót của chế độ trước;
     khi chia đôi thật sự, CSS riêng của mvip-whiteboard-split vẫn điều khiển
     đúng nửa trái. */
  body:not(.mvip-whiteboard-split-open)
    #wordPresentationPresenter.is-powerpoint-slide-mode > .word-presentation-viewport {
    width:100% !important;
    max-width:none !important;
    align-self:stretch !important;
  }
  .word-presentation-presenter.is-powerpoint-slide-mode .ordinary-document-page-host {
    min-height:100%;
    align-items:center;
    justify-content:center;
    overflow:visible;
  }
  .ordinary-pptx-slide-render {
    position:relative;
    width:100%;
    min-width:0;
    flex:0 0 auto;
    margin:auto;
    transform-origin:top left;
    background:transparent;
    cursor:pointer;
    will-change:opacity, transform, clip-path;
  }
  /* Lớp sân khấu chịu trách nhiệm co/căn giữa, còn renderRoot luôn giữ nguyên
     kích thước gốc của PowerPoint. Tách hai việc này để transition của slide
     không ghi đè phép căn giữa và để lần mở sau không kế thừa hình học cũ. */
  .ordinary-pptx-slide-stage {
    position:absolute;
    left:50%;
    top:50%;
    width:1280px;
    height:720px;
    transform:translate(-50%, -50%) scale(1);
    transform-origin:center center;
    flex:0 0 auto;
    margin:0;
    will-change:transform;
  }
  .ordinary-pptx-slide-stage > .ordinary-pptx-slide-render {
    width:100%;
    height:100%;
    margin:0;
  }
  /* Không cho trình duyệt vẽ trang chiếu mới trong khoảng rất ngắn giữa lúc
     thay DOM và lúc các đối tượng hiệu ứng "xuất hiện khi bấm" được ẩn đi.
     Nếu bỏ lớp chặn này, slide có thể chớp toàn bộ nội dung trong một frame. */
  .ordinary-pptx-slide-render.is-pptx-build-staging {
    visibility:hidden !important;
    pointer-events:none !important;
  }
  .ordinary-pptx-slide-render,
  .ordinary-pptx-slide-render * {
    scrollbar-width:none !important;
    -ms-overflow-style:none !important;
  }
  .ordinary-pptx-slide-render::-webkit-scrollbar,
  .ordinary-pptx-slide-render *::-webkit-scrollbar {
    display:none !important;
    width:0 !important;
    height:0 !important;
  }
  .ordinary-pptx-slide-render > :first-child {
    margin-left:auto !important;
    margin-right:auto !important;
  }
  .ordinary-pptx-slide-render .pptx-native-video-host,
  .ordinary-pptx-slide-render .pptx-native-link-host,
  .ordinary-pptx-slide-render .pptx-native-audio-host,
  .ordinary-pptx-slide-render .pptx-native-trigger-host {
    isolation:isolate;
  }
  .ordinary-pptx-slide-render .pptx-native-countdown-host {
    isolation:isolate;
    container-type:inline-size;
  }
  /* PowerPoint cho phép chữ A/B/C/D tràn khỏi hình thoi rất nhỏ của mẫu trò
     chơi. Bộ dựng web phải giữ phần tràn này để không cắt mất ký tự. */
  .ordinary-pptx-slide-render .pptx-native-answer-label-overflow,
  .ordinary-pptx-slide-render .pptx-native-answer-label-overflow * {
    overflow:visible !important;
    contain:none !important;
    text-overflow:clip !important;
  }
  .ordinary-pptx-slide-render .pptx-native-interaction-layer {
    position:absolute !important;
    inset:0 !important;
    z-index:76 !important;
    width:100% !important;
    height:100% !important;
    overflow:hidden !important;
    pointer-events:none !important;
  }
  .ordinary-pptx-slide-render .pptx-native-fallback-host {
    position:absolute !important;
    min-width:1px !important;
    min-height:1px !important;
    pointer-events:none !important;
  }
  .ordinary-pptx-slide-render .pptx-native-video {
    position:absolute !important;
    inset:0 !important;
    z-index:80 !important;
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:0 !important;
    background:#000 !important;
    object-fit:contain !important;
    pointer-events:auto !important;
  }
  .ordinary-pptx-slide-render .pptx-native-link-overlay {
    position:absolute !important;
    inset:0 !important;
    z-index:90 !important;
    display:block !important;
    width:100% !important;
    height:100% !important;
    box-sizing:border-box !important;
    background:transparent !important;
    color:transparent !important;
    cursor:pointer !important;
    pointer-events:auto !important;
    text-decoration:none !important;
  }
  .ordinary-pptx-slide-render .pptx-native-link-overlay:focus-visible {
    outline:3px solid #60a5fa !important;
    outline-offset:2px !important;
  }
  .ordinary-pptx-slide-render .pptx-native-audio {
    display:none !important;
  }
  .ordinary-pptx-slide-render .pptx-native-countdown {
    position:absolute !important;
    inset:0 !important;
    z-index:82 !important;
    display:flex !important;
    align-items:center !important;
    justify-content:center !important;
    width:100% !important;
    height:100% !important;
    margin:0 !important;
    padding:0 !important;
    border:2px solid rgba(255,255,255,.78) !important;
    border-radius:50% !important;
    background:rgba(2,6,23,.42) !important;
    color:#fff !important;
    font:900 clamp(24px,32cqi,112px)/1 Arial,Helvetica,sans-serif !important;
    font-variant-numeric:tabular-nums !important;
    text-shadow:0 2px 8px rgba(0,0,0,.9) !important;
    cursor:pointer !important;
    pointer-events:auto !important;
    box-shadow:inset 0 0 0 4px rgba(255,255,255,.12),0 4px 18px rgba(0,0,0,.32) !important;
  }
  .ordinary-pptx-slide-render .pptx-native-countdown.is-running {
    border-color:#facc15 !important;
    background:rgba(2,6,23,.28) !important;
  }
  .ordinary-pptx-slide-render .pptx-native-countdown.is-ending {
    border-color:#ef4444 !important;
    color:#fecaca !important;
  }
  .ordinary-pptx-slide-render .pptx-native-toast {
    position:absolute !important;
    left:50% !important;
    bottom:4.5% !important;
    z-index:140 !important;
    max-width:min(78%,760px) !important;
    padding:.7em 1em !important;
    border:1px solid rgba(255,255,255,.7) !important;
    border-radius:999px !important;
    background:rgba(2,6,23,.86) !important;
    color:#fff !important;
    font:800 clamp(14px,1.8vw,24px)/1.25 Arial,Helvetica,sans-serif !important;
    text-align:center !important;
    pointer-events:none !important;
    transform:translateX(-50%) !important;
    box-shadow:0 7px 24px rgba(0,0,0,.38) !important;
  }
  .ordinary-pptx-slide-render .pptx-native-media-overlay,
  .ordinary-pptx-slide-render .pptx-native-trigger-overlay {
    position:absolute !important;
    inset:0 !important;
    z-index:96 !important;
    display:block !important;
    width:100% !important;
    height:100% !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:inherit !important;
    background:transparent !important;
    color:transparent !important;
    cursor:pointer !important;
    pointer-events:auto !important;
  }
  .ordinary-pptx-slide-render .pptx-native-media-overlay:focus-visible,
  .ordinary-pptx-slide-render .pptx-native-trigger-overlay:focus-visible {
    outline:3px solid #60a5fa !important;
    outline-offset:2px !important;
  }
  /* Ảnh trong slide PowerPoint chỉ là một phần của trang chiếu, không phải
     ảnh của chế độ Word nên không có con trỏ/nút bấm phóng to. */
  .word-presentation-presenter.is-powerpoint-slide-mode .word-presentation-direct-zoom,
  .word-presentation-presenter.is-powerpoint-slide-mode .cv7991-presentation-image-frame {
    cursor:inherit !important;
    outline:0 !important;
    box-shadow:none !important;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-fade {
    animation:wpPptxFadeIn var(--pptx-transition-duration,.55s) ease both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-push-left {
    animation:wpPptxPushLeft var(--pptx-transition-duration,.55s) ease-out both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-push-right {
    animation:wpPptxPushRight var(--pptx-transition-duration,.55s) ease-out both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-push-up {
    animation:wpPptxPushUp var(--pptx-transition-duration,.55s) ease-out both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-push-down {
    animation:wpPptxPushDown var(--pptx-transition-duration,.55s) ease-out both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-zoom {
    animation:wpPptxZoomIn var(--pptx-transition-duration,.55s) ease-out both;
  }
  .ordinary-pptx-slide-render.is-pptx-transition-wipe {
    animation:wpPptxWipeIn var(--pptx-transition-duration,.55s) ease-out both;
  }
  @keyframes wpPptxFadeIn { from { opacity:0; } to { opacity:1; } }
  @keyframes wpPptxPushLeft { from { opacity:.25; transform:translateX(20%); } to { opacity:1; transform:none; } }
  @keyframes wpPptxPushRight { from { opacity:.25; transform:translateX(-20%); } to { opacity:1; transform:none; } }
  @keyframes wpPptxPushUp { from { opacity:.25; transform:translateY(20%); } to { opacity:1; transform:none; } }
  @keyframes wpPptxPushDown { from { opacity:.25; transform:translateY(-20%); } to { opacity:1; transform:none; } }
  @keyframes wpPptxZoomIn { from { opacity:0; transform:scale(.82); } to { opacity:1; transform:none; } }
  @keyframes wpPptxWipeIn { from { clip-path:inset(0 100% 0 0); } to { clip-path:inset(0); } }
  .ordinary-pdf-page-canvas {
    position:absolute;
    inset:0 auto auto 0;
    display:block;
    background:#fff;
    box-shadow:none;
  }
  .ordinary-docx-style-root {
    position:absolute;
    width:0;
    height:0;
    overflow:hidden;
    pointer-events:none;
  }
  .ordinary-docx-idle-host {
    position:fixed !important;
    left:-100000px !important;
    top:0 !important;
    width:auto !important;
    height:auto !important;
    visibility:hidden !important;
    pointer-events:none !important;
    z-index:-1 !important;
  }
  .ordinary-docx-render .docx-wrapper {
    position:relative !important;
    width:100% !important;
    height:auto !important;
    padding:0 !important;
    margin:0 auto !important;
    background:transparent !important;
    overflow:visible !important;
  }
  .ordinary-docx-render .docx-wrapper > section.docx,
  .ordinary-docx-render section.docx {
    margin:0 auto !important;
    /* Kích thước pgSz của Word đã bao gồm lề trang. Giữ border-box để width
       của section tiếp tục là đúng khổ giấy, không cộng lề thêm lần nữa. */
    box-sizing:border-box !important;
    box-shadow:none !important;
    transform-origin:top left !important;
  }
  /* Các quy tắc table/th/td dùng chung của trang quản trị không được phép
     chảy vào trang Word. Nếu không đặt lại ở phạm vi này, bảng nhỏ bị ép
     min-width:620px và ô không khai báo tcMar bị cộng padding 12px 14px,
     làm toàn bộ cột rộng hơn Word gốc. 5.4pt là lề ô mặc định Table Normal
     của Word; ô có tcMar riêng vẫn thắng bằng style nội tuyến của docx-preview. */
  .ordinary-docx-render section.docx table {
    min-width:0 !important;
    max-width:none !important;
  }
  .ordinary-docx-render section.docx table > tbody > tr > td,
  .ordinary-docx-render section.docx table > tbody > tr > th,
  .ordinary-docx-render section.docx table > tr > td,
  .ordinary-docx-render section.docx table > tr > th {
    min-width:0;
    padding-top:0;
    padding-right:5.4pt;
    padding-bottom:0;
    padding-left:5.4pt;
    font-size:inherit;
    text-align:inherit;
  }
  /* docx-preview mặc định đặt overflow-wrap:break-word cho mọi span, nên
     ngay cả một từ ngắn không có điểm ngắt như TT, TN, TL cũng bị chẻ giữa
     hai ký tự khi ô vừa khít theo tblGrid. Word không ngắt giữa chữ cái như
     vậy: chỉ cho xuống dòng tại khoảng trắng/điểm ngắt hợp lệ. */
  .ordinary-docx-render section.docx table td span,
  .ordinary-docx-render section.docx table th span {
    overflow-wrap:normal !important;
    word-break:normal !important;
  }
  /* Word dùng advance width tương thích GDI cho Times New Roman, còn Chrome
     dùng DirectWrite nên cùng một run thường rộng hơn xấp xỉ 0.01em/ký tự.
     Chỉ run không khai báo w:spacing mới nhận lớp bù này; run có giãn chữ
     trực tiếp vẫn giữ nguyên thông số nguồn. */
  .ordinary-docx-render section.docx table span.mvip-ordinary-word-compatible-advance {
    letter-spacing:-0.01em !important;
  }
  /* Run properties của table style (ví dụ TableGrid 10pt) phải thắng style
     Normal của đoạn. Run có định dạng trực tiếp vẫn tự thắng qua style nội
     tuyến trên span, đúng thứ tự ưu tiên của Word. */
  .ordinary-docx-render section.docx p.mvip-ordinary-word-table-font-size {
    font-size:inherit !important;
  }
  .ordinary-docx-render section.docx p.mvip-ordinary-word-table-font-family {
    font-family:inherit !important;
  }
  .ordinary-docx-render .mvip-ordinary-inline-formula-object {
    display:inline-block !important;
    position:static !important;
    float:none !important;
    width:auto !important;
    max-width:none !important;
    height:auto !important;
    margin:0 .16em !important;
    padding:0 !important;
    line-height:0 !important;
    vertical-align:middle !important;
    overflow:visible !important;
  }
  .ordinary-docx-render svg.mvip-ordinary-inline-formula-svg,
  .ordinary-docx-render svg.mvip-ordinary-inline-formula-svg.word-presentation-direct-zoom,
  .ordinary-docx-render svg.mvip-ordinary-inline-formula-svg.cv7991-presentation-image-frame {
    display:inline-block !important;
    position:static !important;
    float:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:0 !important;
    outline:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    vertical-align:middle !important;
    overflow:visible !important;
    cursor:default !important;
  }
  .ordinary-docx-render .mvip-ordinary-omml-equation,
  .word-presentation-card .mvip-ordinary-omml-equation {
    display:inline-block !important;
    position:static !important;
    float:none !important;
    width:auto !important;
    max-width:100% !important;
    height:auto !important;
    margin:0 !important;
    padding:0 !important;
    line-height:1 !important;
    vertical-align:baseline !important;
    white-space:nowrap !important;
    overflow:visible !important;
  }
  /* Word không co một Equation để ép nó vào phần còn lại của dòng. Trình duyệt
     phải giữ nguyên hộp Equation ở cỡ nguồn rồi để chính quy tắc ngắt dòng của
     đoạn/bảng Word quyết định vị trí. */
  .ordinary-docx-render .mvip-ordinary-omml-equation {
    max-width:none !important;
  }
  .ordinary-docx-render .mvip-ordinary-omml-equation .single-exam-mathjax-equation,
  .ordinary-docx-render .mvip-ordinary-omml-equation .single-exam-rich,
  .word-presentation-card .mvip-ordinary-omml-equation .single-exam-mathjax-equation,
  .word-presentation-card .mvip-ordinary-omml-equation .single-exam-rich {
    display:inline-block !important;
    position:static !important;
    margin:0 !important;
    padding:0 !important;
    line-height:1 !important;
    vertical-align:baseline !important;
    white-space:nowrap !important;
    overflow:visible !important;
  }
  .ordinary-docx-render .mvip-ordinary-omml-equation svg.single-exam-mathjax-svg,
  .word-presentation-card .mvip-ordinary-omml-equation svg.single-exam-mathjax-svg {
    display:inline-block !important;
    position:static !important;
    width:auto;
    height:auto;
    max-width:100% !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    outline:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    overflow:visible !important;
  }
  .ordinary-docx-render .mvip-ordinary-omml-equation svg.single-exam-mathjax-svg {
    max-width:none !important;
  }
  /* Trong Bài giảng và Dùng câu hỏi của MVIP, cỡ chữ của cả trang được bộ
     trình chiếu tự điều chỉnh. Tỷ lệ Equation lấy từ Word thường được giữ bằng
     biến em này nên công thức và chữ luôn tăng/giảm cùng nhau, không lệch dòng. */
  .word-presentation-card .mvip-ordinary-shared-equation {
    font-size:var(--mvip-ordinary-equation-font-size, 1em) !important;
    vertical-align:baseline !important;
  }
  /* MathType OLE trong Word có một hộp hiển thị và w:position riêng. Nếu chỉ
     dựng lại nét MathJax mà bỏ hộp/position, phân thức và biểu thức nhiều tầng
     sẽ nhô lên, chồng vào chữ cùng dòng hoặc câu kế tiếp. Hộp này tham gia
     trực tiếp vào line-box nên trình duyệt tự mở chiều cao dòng giống Word. */
  .ordinary-docx-render .mvip-ordinary-word-mathtype-box {
    display:inline-flex !important;
    position:static !important;
    float:none !important;
    flex:none !important;
    align-items:center !important;
    justify-content:center !important;
    box-sizing:border-box !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    line-height:0 !important;
    white-space:nowrap !important;
    /* Khung OLE của Word là vùng hiển thị thật của MathType. Không cho nét
       MathJax/ảnh dự phòng vượt ra ngoài vùng này vì sẽ đè lên chữ kế bên. */
    overflow:hidden !important;
  }
  .ordinary-docx-render .mvip-ordinary-word-mathtype-visual {
    display:inline-flex !important;
    position:relative !important;
    flex:0 0 auto !important;
    width:max-content !important;
    min-width:0 !important;
    height:max-content !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    align-items:center !important;
    justify-content:center !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    line-height:0 !important;
    white-space:nowrap !important;
    overflow:visible !important;
    transform-origin:center center !important;
  }
  .ordinary-docx-render .mvip-ordinary-word-mathtype-visual > * {
    flex:0 0 auto !important;
    margin-left:0 !important;
    margin-right:0 !important;
    max-width:none !important;
    max-height:none !important;
  }
  .ordinary-docx-render .mvip-ordinary-word-mathtype-raster {
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    object-fit:contain !important;
    object-position:center center !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    outline:0 !important;
    background:transparent !important;
    vertical-align:middle !important;
  }
  /* MathType là công thức, không phải ảnh minh họa: tuyệt đối không vẽ viền xanh
     hoặc hiệu ứng focus/zoom quanh hộp OLE, visual hay ảnh raster. */
  .ordinary-docx-render .mvip-ordinary-word-mathtype-box,
  .ordinary-docx-render .mvip-ordinary-word-mathtype-visual,
  .ordinary-docx-render .mvip-ordinary-word-mathtype-raster,
  .ordinary-docx-render .mvip-ordinary-word-mathtype-box:focus,
  .ordinary-docx-render .mvip-ordinary-word-mathtype-raster:focus {
    border:0 !important;
    outline:0 !important;
    outline-width:0 !important;
    outline-style:none !important;
    box-shadow:none !important;
  }
  .ordinary-document-page-separator {
    display:block;
    width:100%;
    min-width:100%;
    height:1px;
    min-height:1px;
    margin:0;
    padding:0;
    border:0;
    background:#0f172a;
    box-shadow:none;
    flex:0 0 1px;
    position:relative;
    z-index:2;
  }
</style>
<style id="mvip-guide-modal-styles">
  html.mvip-guide-modal-open,
  html.mvip-guide-modal-open body { overflow:hidden !important; }
  .mvip-guide-modal[hidden] { display:none !important; }
  .mvip-guide-modal {
    position:fixed; inset:0; z-index:200000; display:flex; align-items:center; justify-content:center;
    padding:18px; font-family:"Times New Roman",serif;
  }
  .mvip-guide-backdrop { position:absolute; inset:0; background:rgba(15,23,42,.58); backdrop-filter:blur(2px); }
  .mvip-guide-dialog {
    position:relative; z-index:1; width:min(980px,calc(100vw - 24px)); max-height:calc(100vh - 28px);
    display:flex; flex-direction:column; overflow:hidden; background:#fff; border:1px solid #dbe4f0;
    border-radius:20px; box-shadow:0 28px 80px rgba(15,23,42,.34);
  }
  .mvip-guide-head {
    display:flex; align-items:flex-start; justify-content:space-between; gap:18px;
    padding:20px 24px 14px; border-bottom:1px solid #e2e8f0;
    background:linear-gradient(135deg,#f8fbff 0%,#eff8ff 100%);
  }
  .mvip-guide-head h2 { margin:0; color:#0f172a; font-size:clamp(24px,3vw,34px); line-height:1.12; }
  .mvip-guide-head h2 span { color:#0ea5e9; }
  .mvip-guide-head p { margin:6px 0 0; color:#475569; font-size:16px; line-height:1.4; }
  .mvip-guide-close {
    flex:0 0 auto; width:42px; height:42px; border:1px solid #cbd5e1; border-radius:12px;
    background:#fff; color:#334155; font:700 27px/1 Arial,sans-serif; cursor:pointer;
  }
  .mvip-guide-close:hover { color:#dc2626; border-color:#fca5a5; background:#fff7f7; }
  .mvip-guide-body { overflow:auto; padding:16px 24px 22px; overscroll-behavior:contain; }
  .mvip-guide-list { display:grid; gap:8px; }
  .mvip-guide-row {
    display:grid; grid-template-columns:minmax(0,1fr) 118px 128px; align-items:center; gap:10px;
    padding:8px 10px 8px 15px; border:1px solid #dbe4f0; border-radius:12px; background:#f8fafc;
  }
  .mvip-guide-title { color:#0f172a; font-size:18px; font-weight:700; line-height:1.25; }
  .mvip-guide-btn {
    display:inline-flex; align-items:center; justify-content:center; min-height:40px; padding:8px 12px;
    border:0; border-radius:9px; color:#fff !important; text-decoration:none !important;
    font:700 16px/1.15 "Times New Roman",serif; cursor:pointer; box-shadow:0 4px 10px rgba(15,23,42,.12);
  }
  .mvip-guide-btn-video { background:#f97316; }
  .mvip-guide-btn-video:hover { background:#ea580c; }
  .mvip-guide-btn-doc { background:#3b82f6; }
  .mvip-guide-btn-doc:hover { background:#2563eb; }
  .mvip-guide-all-video {
    margin-top:14px; display:flex; align-items:center; justify-content:center; gap:8px;
    color:#0f766e; font-size:17px; font-weight:700; text-decoration:none;
  }
  .mvip-guide-detail[hidden] { display:none !important; }
  .mvip-guide-detail-toolbar { display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:14px; }
  .mvip-guide-back {
    border:1px solid #93c5fd; border-radius:9px; background:#eff6ff; color:#1d4ed8;
    padding:8px 13px; font:700 15px/1.2 "Times New Roman",serif; cursor:pointer;
  }
  .mvip-guide-pdf-link { color:#2563eb; font-size:15px; font-weight:700; text-decoration:none; }
  .mvip-guide-detail-card { border:1px solid #dbe4f0; border-radius:14px; padding:18px 20px; background:#fff; }
  .mvip-guide-detail-card h3 { margin:0 0 12px; color:#0f172a; font-size:25px; line-height:1.25; }
  .mvip-guide-detail-card ul { margin:0; padding-left:24px; color:#24324a; font-size:18px; line-height:1.55; }
  .mvip-guide-detail-card li { margin:7px 0; }
  .mvip-guide-detail-video { margin-top:16px; }
  @media (max-width:720px) {
    .mvip-guide-modal { padding:6px; }
    .mvip-guide-dialog { width:100%; max-height:calc(100vh - 12px); border-radius:14px; }
    .mvip-guide-head { padding:16px 16px 12px; }
    .mvip-guide-head p { font-size:14px; }
    .mvip-guide-body { padding:12px 12px 18px; }
    .mvip-guide-row { grid-template-columns:1fr 1fr; padding:12px; }
    .mvip-guide-title { grid-column:1 / -1; font-size:17px; }
    .mvip-guide-btn { width:100%; min-height:42px; }
    .mvip-guide-detail-card { padding:15px; }
    .mvip-guide-detail-card h3 { font-size:21px; }
    .mvip-guide-detail-card ul { font-size:16px; }
  }
</style>

<script id="mvip-environment-marker">
window.MVIP_ENV = 'production';
window.MVIP_TEST_PATH = '/';
</script>

<style id="exam-mixer-style-20260930">

  .exam-mixer-guide-modal[hidden]{display:none!important}
  .exam-mixer-guide-modal{position:fixed;inset:0;z-index:3200;font-family:inherit}
  .exam-mixer-guide-backdrop{position:absolute;inset:0;background:rgba(15,23,42,.48)}
  .exam-mixer-guide-dialog{
    position:absolute;inset:0;left:0;top:0;transform:none;
    width:100vw;height:100vh;max-width:none;max-height:none;
    display:grid;grid-template-rows:auto 1fr auto;background:#fff;
    border:0;border-radius:0;box-shadow:none;
    overflow:hidden
  }
  .exam-mixer-guide-head{
    display:flex;align-items:flex-start;justify-content:space-between;gap:24px;
    padding:24px 34px 18px;border-bottom:1px solid #dbe5f1;background:#f8fbff
  }
  .exam-mixer-guide-head h3{margin:0;color:#0f172a;font-size:34px;line-height:1.2;font-weight:800}
  .exam-mixer-guide-head p{margin:8px 0 0;color:#64748b;font-size:19px;line-height:1.45}
  .exam-mixer-guide-close{
    width:50px;height:50px;border:1px solid #cbd5e1;border-radius:13px;background:#fff;
    color:#334155;font-size:32px;line-height:1;cursor:pointer;flex:none
  }
  .exam-mixer-guide-body{
    overflow:auto;padding:26px 42px 20px;background:#fff;
    font-size:20px;line-height:1.6
  }
  .exam-mixer-guide-section{
    border:1px solid #dbe5f1;border-radius:16px;padding:22px 26px;margin-bottom:22px;background:#fbfdff
  }
  .exam-mixer-guide-section h4{margin:0 0 14px;color:#0f172a;font-size:25px;line-height:1.35;font-weight:800}
  .exam-mixer-guide-section p{margin:10px 0;color:#334155;font-size:20px;line-height:1.65}
  .exam-mixer-guide-section ul{margin:10px 0 0;padding-left:32px;color:#334155;font-size:20px}
  .exam-mixer-guide-section li{margin:10px 0;line-height:1.6}
  .exam-mixer-guide-section code{
    padding:3px 7px;border-radius:6px;background:#eef2ff;color:#3730a3;
    font:700 18px/1.4 Consolas,monospace
  }
  .exam-mixer-guide-actions{
    display:flex;justify-content:flex-end;padding:18px 34px 22px;border-top:1px solid #e2e8f0;background:#f8fafc
  }
  .exam-mixer-guide-ok{min-width:130px;min-height:48px;font-size:20px;font-weight:800}
  @media(max-width:700px){
    .exam-mixer-guide-dialog{width:100vw;height:100vh;max-width:none;max-height:none;border-radius:0}
    .exam-mixer-guide-head{padding:18px 16px 14px}
    .exam-mixer-guide-head h3{font-size:28px}
    .exam-mixer-guide-head p{font-size:17px}
    .exam-mixer-guide-body{padding:18px 16px 12px;font-size:18px}
    .exam-mixer-guide-section{padding:18px 16px;margin-bottom:16px}
    .exam-mixer-guide-section h4{font-size:22px}
    .exam-mixer-guide-section p,.exam-mixer-guide-section ul{font-size:18px}
    .exam-mixer-guide-actions{padding:14px 16px 18px}
  }

  .exam-mixer-modal[hidden]{display:none!important}
  .exam-mixer-modal{position:fixed;inset:0;z-index:3100;font-family:inherit}
  .exam-mixer-backdrop{position:absolute;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(2px)}
  .exam-mixer-dialog{position:absolute;inset:0;display:grid;grid-template-rows:auto 1fr;background:#fff;border:0;border-radius:0;box-shadow:none;overflow:hidden}
  .exam-mixer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;background:linear-gradient(135deg,#eff6ff,#f8fafc);border-bottom:1px solid #dbe4f0}
  .exam-mixer-head h3{margin:0 0 4px;font-size:22px;color:#0f172a}
  .exam-mixer-head p{margin:0;color:#64748b;font-size:13px}
  .exam-mixer-close{width:38px;height:38px;border:1px solid #cbd5e1;border-radius:12px;background:#fff;color:#475569;font-size:24px;line-height:1;cursor:pointer}
  .exam-mixer-body{min-height:0;display:grid;grid-template-columns:minmax(333px,365px) minmax(0,1fr)}
  .exam-mixer-controls{min-height:0;overflow:auto;padding:10px;border-right:1px solid #e2e8f0;background:#fcfdff;display:grid;gap:9px;align-content:start}
  .exam-mixer-preview-pane{min-width:0;min-height:0;display:grid;grid-template-rows:auto 1fr;padding:10px 12px;gap:9px;background:#f8fafc}
  .exam-mixer-card{
    border:2px solid #2563eb;
    border-radius:13px;
    background:#fff;
    padding:10px;
    display:grid;
    gap:8px;
    box-shadow:0 1px 4px rgba(37,99,235,.08)
  }
  .exam-mixer-card-title{font-weight:900;color:#0f172a;font-size:14px}
  .exam-mixer-upload-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
  .exam-mixer-file-name{min-width:0;flex:1;color:#475569;font-size:12px;overflow-wrap:anywhere}
  .exam-mixer-forms{display:grid;gap:8px}

  .exam-mixer-form-mode-card{
    padding:0!important;overflow:visible!important;
    min-height:48px!important;display:block!important
  }
  .exam-mixer-form-mode-head{
    display:flex!important;align-items:center!important;gap:10px!important;
    min-height:48px!important;padding:12px 14px!important;
    cursor:pointer!important;font-weight:800!important;color:#0f172a!important;
    background:#f8fbff!important;font-size:14px!important;line-height:1.35!important;
    visibility:visible!important;opacity:1!important;box-sizing:border-box!important
  }
  .exam-mixer-form-mode-title{
    display:block!important;visibility:visible!important;opacity:1!important;
    color:#0f172a!important;font-size:14px!important;font-weight:800!important;
    line-height:1.35!important;white-space:normal!important
  }
  .exam-mixer-form-mode-head input{
    display:block!important;visibility:visible!important;opacity:1!important;
    width:17px!important;height:17px!important;min-width:17px!important;flex:none!important;
    margin:0!important
  }
  .exam-mixer-form-mode-body{
    border-top:1px solid #dbe5f1;padding:14px 16px 16px;background:#fff
  }
  .exam-mixer-form-mode-body[hidden]{display:none!important}

  #examMixerModal .exam-mixer-card-title{
    display:block!important;
    visibility:visible!important;
    opacity:1!important;
    min-height:22px!important;
    line-height:1.35!important;
  }
  #examMixerModal .exam-mixer-forms{
    display:grid!important;
    gap:8px!important;
  }
  #examMixerModal .exam-mixer-form-option{
    display:flex!important;
    align-items:center!important;
    gap:8px!important;
    min-height:34px!important;
    visibility:visible!important;
    opacity:1!important;
  }
  #examMixerModal .exam-mixer-form-option input[type="radio"]{
    display:block!important;
    visibility:visible!important;
    opacity:1!important;
    flex:none!important;
  }

  .exam-mixer-essay-lines-field{
    display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:0 0 12px;
    padding:10px 12px;border:1px solid #dbe5f1;border-radius:10px;background:#f8fafc
  }
  .exam-mixer-essay-lines-field label{font-weight:700;color:#334155}
  .exam-mixer-essay-lines-field input{
    width:88px;padding:8px 10px;border:1px solid #cbd5e1;border-radius:9px;
    font:inherit;text-align:center
  }
  .exam-mixer-essay-work{margin-top:18px;padding-top:4px}
  .exam-mixer-essay-work-title{
    text-align:center;font-weight:800;margin:0 0 6px
  }
  .exam-mixer-essay-work-line{
    display:block;
    width:100%;
    box-sizing:border-box;
    height:1.5em;
    line-height:1.5;
    border-bottom:2px dotted #555;
    margin:0;
  }

  .exam-mixer-form-option{display:flex;align-items:center;gap:8px;padding:9px 10px;border:1px solid #dbeafe;border-radius:12px;background:#f8fbff;font-weight:800;color:#1e293b;cursor:pointer}
  .exam-mixer-form-option input{margin:0}
  .exam-mixer-grid{display:grid;grid-template-columns:1fr;gap:7px}
  .exam-mixer-field{display:grid;gap:5px}
  .exam-mixer-field.span-2{grid-column:auto}
  .exam-mixer-field label{font-size:12px;font-weight:800;color:#334155}
  .exam-mixer-field input,.exam-mixer-field select{width:100%;box-sizing:border-box;border:1px solid #cbd5e1;border-radius:9px;padding:7px 8px;background:#fff;color:#0f172a;font:inherit;font-size:13px;outline:none}
  .exam-mixer-field input:focus,.exam-mixer-field select:focus{border-color:#60a5fa;box-shadow:0 0 0 3px rgba(59,130,246,.13)}
  .exam-mixer-note{font-size:12px;line-height:1.45;color:#64748b}
  .exam-mixer-group-guide{font-size:13px;line-height:1.55;color:#0f172a;background:#f8fafc;border:1px dashed #cbd5e1;border-radius:12px;padding:10px 12px}
  .exam-mixer-group-guide p{margin:0 0 8px}.exam-mixer-group-guide p:last-child{margin-bottom:0}
  .exam-mixer-group-guide code{font-family:Consolas,monospace;background:#eef2ff;color:#312e81;border-radius:8px;padding:1px 6px;font-size:12px;font-weight:700}
  .exam-mixer-inline-img{display:inline-block!important;width:auto!important;height:auto!important;max-width:48%!important;max-height:2.25em!important;vertical-align:-0.45em!important;margin:0 2px!important;object-fit:contain!important}

  .exam-mixer-word-equation{display:inline-flex;align-items:center;vertical-align:middle;line-height:1;margin:0 1px;color:inherit}
  .exam-mixer-word-equation-block{display:flex;justify-content:center;align-items:center;width:100%;margin:5px 0 7px;line-height:1.15;color:inherit}
  .exam-mixer-word-equation .single-exam-rich,.exam-mixer-word-equation-block .single-exam-rich{display:inline-flex;align-items:center;max-width:100%;color:inherit}
  .exam-mixer-word-equation svg,.exam-mixer-word-equation-block svg{max-width:100%;height:auto;overflow:visible}
  .exam-mixer-math-img{display:inline-block!important;max-width:none!important;max-height:none!important;object-fit:fill!important;margin:0 1px!important}
  .exam-mixer-rich-img:not(.exam-mixer-inline-img):not(.exam-mixer-math-img){display:block;max-width:82%;max-height:430px;width:auto;height:auto;margin:10px auto;object-fit:contain}
  .exam-mixer-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
  .exam-mixer-status{min-height:42px;padding:9px 10px;border:1px solid #dbe4f0;border-radius:12px;background:#f8fafc;color:#475569;font-size:12px;line-height:1.45}
  .exam-mixer-status.ok{background:#ecfdf5;border-color:#bbf7d0;color:#166534}
  .exam-mixer-status.err{background:#fef2f2;border-color:#fecaca;color:#b91c1c}
  .exam-mixer-preview-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
  .exam-mixer-preview-head-left{display:flex;align-items:center;gap:8px;min-width:0}
  .exam-mixer-preview-head strong{color:#0f172a}
  .exam-mixer-preview-head select{border:1px solid #cbd5e1;border-radius:10px;padding:8px 10px;background:#fff}
  .exam-mixer-preview{min-height:0;overflow:auto;border:1px solid #cbd5e1;border-radius:16px;background:#dfe5ec;padding:18px}
  .exam-mixer-page{max-width:794px;min-height:1050px;margin:0 auto;background:#fff;box-shadow:0 7px 22px rgba(15,23,42,.16);padding:58px 58px 70px;box-sizing:border-box;color:#111827;font-family:'Times New Roman',Times,serif;font-size:16px;line-height:1.35}
  .exam-mixer-header-grid{display:grid;grid-template-columns:38% 62%;gap:12px;align-items:start;margin-bottom:12px}
  .exam-mixer-header-left,.exam-mixer-header-right{text-align:center}
  .exam-mixer-header-left{transform:translateY(-1.05em)}
  .exam-mixer-header-right .b,.exam-mixer-header-left .b{font-weight:700}
  .exam-mixer-header-time{font-style:italic}
  .exam-mixer-header-simple{display:grid;grid-template-columns:1fr auto;gap:18px;margin-bottom:8px}
  .exam-mixer-info-line{display:grid;grid-template-columns:minmax(0,1fr) 22% 19%;gap:12px;margin:8px 0 12px}
  .exam-mixer-cut-table,.exam-mixer-score-table,.exam-mixer-tf-table{width:100%;border-collapse:collapse;margin:0}
  .exam-mixer-cut-table td,.exam-mixer-score-table td,.exam-mixer-score-table th,.exam-mixer-tf-table td,.exam-mixer-tf-table th{border:1px solid #111;padding:4px 6px;vertical-align:middle}
  .exam-mixer-form1-top-table{margin-top:4px}
  .exam-mixer-form1-top-table tr:nth-child(1){height:42px}
  .exam-mixer-form1-top-table tr:nth-child(2){height:42px}
  .exam-mixer-form1-top-table tr:nth-child(3){height:40px}
  .exam-mixer-cut-line{border-top:1px dashed #777;margin:27px -18px 14px;position:relative;height:0}
  .exam-mixer-cut-line:before{display:none!important;content:none!important}
  .exam-mixer-form1-cut-gap{height:1cm;position:relative;margin:0}
  .exam-mixer-form1-cut-gap::before{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px dashed #555;transform:translateY(-50%)}
  .exam-mixer-form1-bottom-number{margin:0}
  .exam-mixer-form1-bottom-table{margin:0 0 12px}
  .exam-mixer-form1-bottom-table .phach-row{height:40px;font-weight:700}
  .exam-mixer-form1-bottom-table .score-head-row{height:32px;font-weight:700;text-align:center}
  .exam-mixer-form1-bottom-table .score-empty-row{height:74px}
  .exam-mixer-form1-bottom-table .score-empty-row td{vertical-align:top}
  .exam-mixer-answer-wrap{position:relative;display:inline-flex;align-items:center}
  .exam-mixer-answer-menu{position:absolute;top:calc(100% + 6px);left:0;z-index:20;min-width:210px;padding:6px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;box-shadow:0 8px 24px rgba(15,23,42,.16);display:grid;gap:4px}
  .exam-mixer-answer-menu[hidden]{display:none!important}
  .exam-mixer-answer-menu button{border:0;border-radius:8px;background:#f8fafc;color:#0f172a;text-align:left;padding:9px 10px;font:700 13px/1.2 inherit;cursor:pointer}
  .exam-mixer-answer-menu button:hover{background:#eff6ff;color:#1d4ed8}
  .exam-mixer-section{font-weight:800;margin:14px 0 8px}
  .exam-mixer-question{margin:0 0 10px}
  .exam-mixer-question-prompt{margin:0 0 4px}
  .exam-mixer-options{display:grid;gap:3px 20px;width:100%}
  .exam-mixer-options.mode-row4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .exam-mixer-options.mode-grid2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .exam-mixer-options.mode-stack{grid-template-columns:1fr}
  .exam-mixer-option{margin:0;min-width:0}
  .exam-mixer-rich-img{display:block;max-width:min(100%,420px);max-height:280px;margin:6px 0}
  .exam-mixer-rich-table{border-collapse:collapse;width:100%;margin:6px 0}
  .exam-mixer-rich-table td{border:1px solid #777;padding:4px 6px}
  .exam-mixer-rich-table.exam-mixer-table-no-borders td,
  .exam-mixer-rich-table.exam-mixer-table-no-borders th{border:0!important}
  .exam-mixer-rich-table td.is-bold{font-weight:700}

  .exam-mixer-bbt{width:100%;border-collapse:collapse;table-layout:fixed;margin:8px 0 10px;font-family:"Times New Roman",Times,serif}
  .exam-mixer-bbt td{padding:0;border:0;color:#111;box-sizing:border-box}
  .exam-mixer-bbt .bbt-label{width:58px;text-align:center;font-style:italic;font-size:1.12em;border-right:1px solid #222}
  .exam-mixer-bbt .bbt-x .bbt-label,.exam-mixer-bbt .bbt-xdata{border-bottom:1px solid #222}
  .exam-mixer-bbt .bbt-yp .bbt-label,.exam-mixer-bbt .bbt-ypdata{border-bottom:1px solid #222}
  .exam-mixer-bbt .bbt-xdata,.exam-mixer-bbt .bbt-ypdata{height:34px}
  .exam-mixer-bbt-grid{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));align-items:center;height:100%}
  .exam-mixer-bbt-slot{text-align:center;min-width:0;white-space:nowrap;line-height:1}
  .exam-mixer-bbt-ydata{height:102px;position:relative;overflow:visible}
  .exam-mixer-bbt-stage{position:relative;width:100%;height:102px}
  .exam-mixer-bbt-stage svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
  .exam-mixer-bbt-stage line{stroke:#111;stroke-width:1.25;fill:none}
  .exam-mixer-bbt-val{position:absolute;transform:translate(-50%,-50%);white-space:nowrap;line-height:1}
  .exam-mixer-bbt-val.top{top:17%}
  .exam-mixer-bbt-val.bottom{top:83%}

  .exam-mixer-rich-table td .exam-mixer-math-img,
  .exam-mixer-rich-table td .exam-mixer-word-equation,
  .exam-mixer-rich-table td .mvip-interactive-live-mathtype,
  .exam-mixer-rich-table td .mvip-ordinary-live-mathtype{margin:0!important;vertical-align:baseline!important}

  .exam-mixer-empty{display:flex;min-height:300px;align-items:center;justify-content:center;text-align:center;color:#64748b;font-family:inherit;font-weight:700}
  @media(max-width:900px){.exam-mixer-dialog{inset:0}.exam-mixer-body{grid-template-columns:1fr}.exam-mixer-controls{max-height:42vh;border-right:0;border-bottom:1px solid #e2e8f0}.exam-mixer-grid{grid-template-columns:1fr}.exam-mixer-field.span-2{grid-column:auto}.exam-mixer-page{padding:32px 26px;min-height:900px}}
</style>


<style id="mvip-local-wmv-transcode-style-20261007">
  .ordinary-pptx-slide-render .pptx-local-video-status {
    position:absolute !important; inset:0 !important; z-index:83 !important;
    display:flex !important; flex-direction:column !important; align-items:center !important;
    justify-content:center !important; gap:.55em !important; padding:1em !important;
    box-sizing:border-box !important; background:rgba(15,23,42,.72) !important;
    color:#fff !important; text-align:center !important; pointer-events:none !important;
    font-family:Arial,Helvetica,sans-serif !important;
  }
  .ordinary-pptx-slide-render .pptx-local-video-status strong {
    font-size:clamp(14px,2.2vw,28px) !important; line-height:1.2 !important; font-weight:900 !important;
  }
  .ordinary-pptx-slide-render .pptx-local-video-status small {
    font-size:clamp(10px,1.3vw,16px) !important; line-height:1.25 !important; opacity:.9 !important;
  }
  .ordinary-pptx-slide-render .pptx-local-video-status.is-error { background:rgba(127,29,29,.86) !important; }
  .ordinary-pptx-slide-render .pptx-local-video-spinner {
    width:clamp(24px,4vw,48px) !important; height:clamp(24px,4vw,48px) !important;
    border:4px solid rgba(255,255,255,.3) !important; border-top-color:#fff !important;
    border-radius:50% !important; animation:mvipLocalVideoSpin .85s linear infinite !important;
  }
  .ordinary-pptx-slide-render .pptx-local-video-status.is-error .pptx-local-video-spinner { display:none !important; }
  @keyframes mvipLocalVideoSpin { to { transform:rotate(360deg); } }
</style>

<style id="cv7991-ndtc-stacked-media-v11">
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media.has-presentation-media
  .word-presentation-content-shell {
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) !important;
    grid-template-rows:max-content minmax(0, 1fr) !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    column-gap:0 !important;
    row-gap:clamp(8px, 1vh, 14px) !important;
    align-items:stretch !important;
    align-content:stretch !important;
    overflow:hidden !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-question-line.is-ndtc-question-line {
    grid-column:1 !important;
    grid-row:1 !important;
    display:block !important;
    position:relative !important;
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
    height:auto !important;
    min-height:0 !important;
    margin:0 !important;
    align-self:start !important;
    justify-self:stretch !important;
    overflow:visible !important;
    z-index:2 !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-question-line.is-ndtc-question-line
  > .word-presentation-ndtc-title {
    display:block !important;
    width:100% !important;
    box-sizing:border-box !important;
    margin:0 !important;
    padding:0 .35em !important;
    text-align:center !important;
    white-space:normal !important;
    line-height:1.16 !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel {
    grid-column:1 !important;
    grid-row:2 !important;
    display:flex !important;
    position:relative !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    align-self:stretch !important;
    justify-self:stretch !important;
    align-items:stretch !important;
    justify-content:center !important;
    overflow:hidden !important;
    z-index:1 !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > img,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > canvas {
    display:block !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:100% !important;
    max-height:100% !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    box-shadow:none !important;
    object-fit:contain !important;
    object-position:center top !important;
    align-self:stretch !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .single-exam-inline-vector,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .single-exam-word-group-figure {
    display:flex !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:100% !important;
    max-height:100% !important;
    margin:0 !important;
    padding:0 !important;
    align-items:flex-start !important;
    justify-content:center !important;
    align-self:stretch !important;
    overflow:visible !important;
  }

  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .single-exam-inline-vector > svg,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .single-exam-word-group-figure > svg {
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    transform:none !important;
    transform-origin:center top !important;
  }
</style>

<style id="mvip-ndtc-one-image-max-size-20261011">
  /* NDTC chỉ có một hình: ưu tiên trọn chiều rộng hoặc chiều cao màn chiếu,
     không méo, không crop; tiêu đề Word (nếu có) nằm riêng phía trên. */
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media.has-presentation-media
  .word-presentation-media-panel { align-items:center !important; }
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-image-no-title
  .word-presentation-content-shell {
    grid-template-rows:minmax(0, 1fr) !important;
    row-gap:0 !important;
  }
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-image-no-title
  .word-presentation-question-line.is-ndtc-question-line { display:none !important; }
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-image-no-title
  .word-presentation-media-panel { grid-row:1 !important; }
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .single-exam-inline-media,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel > .cv7991-word-small-flow-image {
    display:flex !important;
    align-items:center !important;
    justify-content:center !important;
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    margin:0 !important;
    padding:0 !important;
  }
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel img,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel canvas,
  .word-presentation-presenter:not(.is-all-view)
  .word-presentation-card.cv7991-ndtc-stacked-media
  .word-presentation-media-panel svg {
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    object-fit:contain !important;
    object-position:center center !important;
  }
  /* Giải NDTC chỉ có một ảnh: nới hộp lời giải gần hết màn hình,
     ảnh dùng object-fit:contain để giữ nguyên tỷ lệ nguồn. */
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-dialog {
    display:flex !important;
    flex-direction:column !important;
    width:calc(100vw - 24px) !important;
    height:calc(100vh - 24px) !important;
    max-height:calc(100vh - 24px) !important;
    overflow:hidden !important;
  }
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content {
    flex:1 1 auto !important;
    min-height:0 !important;
    display:flex !important;
    flex-direction:column !important;
    align-items:center !important;
    justify-content:center !important;
    overflow:hidden !important;
    padding:8px !important;
  }
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content .cv7991-presentation-visual-paragraph,
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content .single-exam-inline-media,
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content .single-exam-inline-vector {
    display:flex !important;
    flex:1 1 auto !important;
    align-items:center !important;
    justify-content:center !important;
    width:100% !important;
    height:100% !important;
    min-height:0 !important;
    max-width:100% !important;
    max-height:100% !important;
    margin:0 !important;
    padding:0 !important;
  }
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content img,
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content canvas,
  .word-presentation-answer-modal.cv7991-ndtc-single-image-answer
  .word-presentation-answer-content svg {
    display:block !important;
    width:100% !important;
    height:100% !important;
    max-width:100% !important;
    max-height:100% !important;
    object-fit:contain !important;
    object-position:center center !important;
  }
</style>

</head>
<body>
<header class="topbar">
<div class="container topbar-inner">
<a class="brand" href="#top">
<div class="brand-badge"><img alt="Mvip logo" 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"/></div>
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<small>Dạy học tương tác đa năng</small>
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<div class="intro-brief-brand">MVIP</div>
<h1 class="intro-brief-title">Phần mềm dạy học tương tác và kiểm tra trắc nghiệm bằng thẻ</h1>
<p class="intro-brief-slogan">Trình chiếu thông minh – Tương tác tức thời – Kiểm tra thuận tiện</p>
</div>
</div>
<ul class="intro-brief-list">
<li class="intro-brief-item is-action">
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<span>Trình chiếu PowerPoint, Word, PDF, Excel</span>
<span class="intro-brief-action-arrow"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></span>
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<li class="intro-brief-item is-action">
<button class="intro-brief-action" id="introQuestionPresentationBtn" title="Chọn tệp Word có câu hỏi để trình chiếu thành câu hỏi tương tác" type="button">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 4h10a3 3 0 0 1 3 3v13H8a3 3 0 0 1-3-3V4Z" stroke="currentColor" stroke-linejoin="round" stroke-width="1.8"/><path d="M8 8h7M8 12h5M15 14v6m-3-3h6" stroke="currentColor" stroke-linecap="round" stroke-width="1.8"/></svg></span>
<span>Trình chiếu câu hỏi word thành câu hỏi tương tác</span>
<span class="intro-brief-action-arrow"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></span>
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<li class="intro-brief-item is-action">
<button class="intro-brief-action" id="introMvipCheckBtn" title="Chọn lớp - môn để dùng câu hỏi của Mvip" type="button">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 9V5h4M16 5h4v4M20 15v4h-4M8 19H4v-4M8 9h8v6H8z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/><path d="m10 12 1.4 1.4L14.5 10" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></span>
<span>Trình chiếu, kiểm tra bằng hệ thống câu hỏi của Mvip</span>
<span class="intro-brief-action-arrow"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></span>
</button>
</li>
<li class="intro-brief-item is-action" id="introExamMixerItem">
<button class="intro-brief-action" id="introExamMixerBtn" title="Tải đề Word lên và trộn thành nhiều mã đề" type="button">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 6h5l2 3h9M4 18h5l2-3h9" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/><path d="m17 6 3 3-3 3M17 12l3 3-3 3" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></span>
<span>Trộn đề</span>
<span class="intro-brief-action-arrow"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></span>
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<li class="intro-brief-item is-action" hidden="" id="introLessonPlanItem">
<button class="intro-brief-action" disabled="" id="introLessonPlanBtn" title="Mở danh sách Bài giảng" type="button">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 5.5A2.5 2.5 0 0 1 6.5 3H11v16H6.5A2.5 2.5 0 0 0 4 21.5v-16ZM20 5.5A2.5 2.5 0 0 0 17.5 3H13v16h4.5a2.5 2.5 0 0 1 2.5 2.5v-16Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></span>
<span>Bài giảng</span>
<span class="intro-brief-action-arrow"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></span>
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<li class="intro-brief-item" id="introDrawingLabel">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="m4 20 4.4-1.1L19 8.3 15.7 5 5.1 15.6 4 20Z" stroke="currentColor" stroke-linejoin="round" stroke-width="1.8"/><path d="M13 7.7 16.3 11" stroke="currentColor" stroke-width="1.8"/></svg></span>
<span>Viết, vẽ và sử dụng các công cụ trực quan</span>
</li>
<li class="intro-brief-item" id="introCardCheckLabel">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 9V5h4M16 5h4v4M20 15v4h-4M8 19H4v-4M8 9h8v6H8z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/><path d="m10 12 1.4 1.4L14.5 10" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></span>
<span>Kiểm tra trắc nghiệm bằng thẻ</span>
</li>
<li class="intro-brief-item" id="introMagicWheelLabel">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><circle cx="12" cy="13" r="8" stroke="currentColor" stroke-width="1.8"/><path d="M12 5v8l6.9-4M12 13 5.1 9M12 13l6.9 4M12 13l-6.9 4" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5"/><path d="m12 1.5-2.1 3.6h4.2L12 1.5Z" fill="currentColor"/><circle cx="12" cy="13" r="1.8" fill="currentColor"/></svg></span>
<span>Vòng quay may mắn gọi học sinh trả lời</span>
</li>
<li class="intro-brief-item" id="introQuestionBankLabel">
<span class="intro-brief-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M6 3h12v18H6z" stroke="currentColor" stroke-linejoin="round" stroke-width="1.8"/><path d="M9 7h6M9 11h6M9 15h3" stroke="currentColor" stroke-linecap="round" stroke-width="1.8"/><circle cx="16" cy="16" r="2.5" stroke="currentColor" stroke-width="1.6"/><path d="m17.8 17.8 1.7 1.7" stroke="currentColor" stroke-linecap="round" stroke-width="1.6"/></svg></span>
<span>Hàng trăm ngàn câu hỏi trắc nghiệm sẵn có để sử dụng</span>
</li>
</ul>
</div>
</div>
</section>


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<div class="exam-mixer-guide-modal" hidden id="examMixerGuideModal" aria-hidden="true">
  <div class="exam-mixer-guide-backdrop" data-exam-mixer-guide-close="1"></div>
  <div class="exam-mixer-guide-dialog" role="dialog" aria-modal="true" aria-labelledby="examMixerGuideTitle">
    <div class="exam-mixer-guide-head">
      <div>
        <h3 id="examMixerGuideTitle">Hướng dẫn trộn đề</h3>
        <p>Đọc nhanh hướng dẫn soạn đề gốc và quy ước nhóm trước khi bắt đầu.</p>
      </div>
      <button type="button" class="exam-mixer-guide-close" id="examMixerGuideCloseBtn" aria-label="Đóng">×</button>
    </div>
    <div class="exam-mixer-guide-body">
      <section class="exam-mixer-guide-section">
        <h4>Hướng dẫn soạn đề gốc</h4>
        <ul>
          <li>Soạn đề bằng file Word <b>.docx</b>; mỗi câu nên bắt đầu bằng dạng <b>Câu 1.</b>, <b>Câu 2.</b>, <b>Câu 3.</b>...</li>
          <li>Với câu nhiều lựa chọn, trình bày các phương án <b>A.</b>, <b>B.</b>, <b>C.</b>, <b>D.</b>. Có thể đánh dấu đáp án đúng bằng <u>A</u> hoặc bôi đỏ <span style="color:#dc2626;font-weight:700">B</span> hoặc dùng dòng <b>Đáp án: A</b>, <b>Đáp án: B</b>...</li>
          <li>Với câu đúng sai có gạch chân <u>a</u> hoặc bôi đỏ <span style="color:#dc2626;font-weight:700">b</span> vào ý đúng hoặc ghi kiểu <b>Đáp án: a: Đ; b: Đ; c: S; d: S</b>.</li>
          <li>Với câu trả lời ngắn hoặc tự luận ghi <b>Đáp án:</b> hoặc <b>Trả lời:</b></li>
          <li>Có thể dùng bảng biểu, hình ảnh, MathType và Word Equation trong nội dung câu hỏi.</li>
          <li>Nếu đề có nhiều dạng câu, có thể giữ các tiêu đề phần như <b>TRẮC NGHIỆM NHIỀU LỰA CHỌN</b>, <b>ĐÚNG – SAI</b>, <b>TRẢ LỜI NGẮN</b>, <b>TỰ LUẬN</b>.</li>
          <li>Phần thông tin đầu đề không cần đặt trong nội dung câu hỏi; MVIP sẽ tạo lại theo form được chọn.</li>
        </ul>
      </section>
      <section class="exam-mixer-guide-section">
        <h4>Quy ước trộn đề theo nhóm</h4>
        <p><code>&lt;m0&gt;</code> Nhóm câu hỏi <b>không cần trộn</b>.</p>
        <p><code>&lt;m1&gt;</code> Nhóm câu hỏi <b>chỉ hoán vị thứ tự các câu hỏi</b>.</p>
        <p><code>&lt;m2&gt;</code> Nhóm câu hỏi <b>chỉ hoán vị thứ tự các đáp án</b>.</p>
        <p><code>&lt;m3&gt;</code> Nhóm câu hỏi <b>hoán vị cả thứ tự câu hỏi và thứ tự đáp án</b>.</p>
        <p>Khi cần <b>cố định vị trí của một nhóm</b>, thêm dấu <code>#</code> ngay trước mã nhóm:
          <code>&lt;#m0&gt;</code>, <code>&lt;#m1&gt;</code>, <code>&lt;#m2&gt;</code>, <code>&lt;#m3&gt;</code>.
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      </section>
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    <div class="exam-mixer-guide-actions">
      <button type="button" class="nav-btn btn-primary exam-mixer-guide-ok" id="examMixerGuideOkBtn">OK</button>
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  <div class="exam-mixer-backdrop" data-exam-mixer-close="1"></div>
  <div class="exam-mixer-dialog" role="dialog" aria-modal="true" aria-labelledby="examMixerTitle">
    <div class="exam-mixer-head">
      <div>
        <h3 id="examMixerTitle">Trộn đề</h3>
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      <button type="button" class="exam-mixer-close" id="examMixerCloseBtn" aria-label="Đóng">×</button>
    </div>
    <div class="exam-mixer-body">
      <div class="exam-mixer-controls">
        <div class="exam-mixer-card">
          <div class="exam-mixer-card-title">1. Tải đề lên</div>
          <div class="exam-mixer-upload-row">
            <button type="button" class="nav-btn btn-primary" id="examMixerUploadBtn">Tải đề lên</button>
            <span class="exam-mixer-file-name" id="examMixerFileName">Chưa chọn file Word (.docx).</span>
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          <div class="exam-mixer-card-title">2. Thông tin trên đề</div>
          <div class="exam-mixer-grid">
            <div class="exam-mixer-field"><label for="examMixerExamTitle">Tên đề</label><input id="examMixerExamTitle" type="text" placeholder="Ví dụ: ĐỀ KIỂM TRA GIỮA HỌC KỲ I"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerDistrict">Tên đơn vị cấp trên / Sở</label><input id="examMixerDistrict" type="text" placeholder="Ví dụ: UBND XÃ ĐỒNG BẰNG"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerSchool">Tên trường</label><input id="examMixerSchool" type="text" placeholder="Ví dụ: THCS ĐỒNG BẰNG"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerSubject">Môn</label><input id="examMixerSubject" type="text" placeholder="Ví dụ: TOÁN"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerGrade">Khối/lớp</label><input id="examMixerGrade" type="text" placeholder="Ví dụ: 8"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerSchoolYear">Năm học</label><input id="examMixerSchoolYear" type="text" placeholder="Ví dụ: 2026-2027"></div>
            <div class="exam-mixer-field mixer-extended-field"><label for="examMixerDuration">Thời gian làm bài</label><input id="examMixerDuration" type="text" placeholder="Ví dụ: 90"></div>
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        <div class="exam-mixer-card">
          <div class="exam-mixer-card-title">3. Chọn form làm trực tiếp trên đề</div>
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            <label for="examMixerEssayLineCount">Số dòng viết tự luận</label>
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            <span>dòng</span>
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          <div class="exam-mixer-forms">
            <label class="exam-mixer-form-option"><input type="radio" name="examMixerForm" value="form1" checked> <span>Form 1 – có cắt phách</span></label>
            <label class="exam-mixer-form-option"><input type="radio" name="examMixerForm" value="form2"> <span>Form 2. Đơn giản</span></label>
            <label class="exam-mixer-form-option"><input type="radio" name="examMixerForm" value="form3"> <span>Form 3 – không cắt phách</span></label>
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        <div class="exam-mixer-card">
          <div class="exam-mixer-card-title">4. Chọn form không làm trực tiếp trên đề</div>
          <div class="exam-mixer-forms">
            <label class="exam-mixer-form-option"><input type="radio" name="examMixerForm" value="form4"> <span>Form 4. Đơn giản</span></label>
            <label class="exam-mixer-form-option"><input type="radio" name="examMixerForm" value="form5"> <span>Form 5 – không cắt phách</span></label>
          </div>
        </div>

        <div class="exam-mixer-card">
          <div class="exam-mixer-card-title">5. Số mã đề</div>
          <div class="exam-mixer-grid">
            <div class="exam-mixer-field"><label for="examMixerCodeCount">Số mã đề cần sinh</label><input id="examMixerCodeCount" type="number" min="1" max="100" step="1" value="4"></div>
          </div>
        </div>

        <div class="exam-mixer-actions"><button type="button" class="nav-btn btn-primary" id="examMixerShuffleBtn">Trộn đề</button></div>
        <div class="exam-mixer-status" id="examMixerStatus">Tải một file Word để bắt đầu.</div>
      </div>
      <div class="exam-mixer-preview-pane">
        <div class="exam-mixer-preview-head">
          <div class="exam-mixer-preview-head-left"><strong>Xem trước đề</strong><select id="examMixerPreviewCode" disabled><option value="">Chưa có mã đề</option></select><span class="exam-mixer-answer-wrap"><button type="button" class="nav-btn" id="examMixerAnswerBtn" disabled>Đáp án</button><span class="exam-mixer-answer-menu" id="examMixerAnswerMenu" hidden><button type="button" id="examMixerAnswerExcelBtn">Trắc nghiệm – Excel</button><button type="button" id="examMixerAnswerWordBtn">Tự luận – Word</button></span></span></div>
          <button type="button" class="nav-btn btn-primary" id="examMixerDownloadBtn" disabled>Tải xuống</button>
        </div>
        <div class="exam-mixer-preview" id="examMixerPreview"><div class="exam-mixer-empty">Đề sau khi trộn sẽ hiển thị tại đây.</div></div>
      </div>
    </div>
  </div>
</div>

<div aria-hidden="true" aria-labelledby="introMvipCheckTitle" aria-modal="true" class="intro-mvip-check-modal" hidden="" id="introMvipCheckModal" role="dialog">
<div class="intro-mvip-check-backdrop" data-intro-mvip-close="1"></div>
<div class="intro-mvip-check-dialog">
<div class="intro-mvip-check-head">
<h3 id="introMvipCheckTitle">Dùng câu hỏi của Mvip</h3>
<button aria-label="Đóng" class="intro-mvip-check-close" data-intro-mvip-close="1" type="button">×</button>
</div>
<select aria-label="Chọn lớp - môn" class="intro-mvip-check-select" id="introMvipClassSubjectSelect">
<option value="">Chọn lớp - môn</option>
</select>
<div class="intro-mvip-check-actions">
<button class="intro-mvip-check-action" disabled="" id="introMvipExamCodeBtn" type="button">Chấm theo mã đề</button>
<button class="intro-mvip-check-action" disabled="" id="introMvipQuestionBankBtn" type="button">Dùng câu hỏi của MVIP</button>
</div>
<p aria-live="polite" class="intro-mvip-check-status" id="introMvipCheckStatus"></p>
</div>
</div>
<div aria-hidden="true" aria-labelledby="introExamGuideTitle" aria-modal="true" class="intro-exam-guide-modal" hidden="" id="introExamGuideModal" role="dialog">
<div class="intro-exam-guide-backdrop" data-intro-exam-guide-close="1"></div>
<div class="intro-exam-guide-dialog">
<div class="intro-exam-guide-head">
<h3 id="introExamGuideTitle">Thông báo</h3>
<button aria-label="Đóng" class="intro-exam-guide-close" data-intro-exam-guide-close="1" type="button">×</button>
</div>
<p class="intro-exam-guide-message">Hiện tại bạn chưa tạo mã đề</p>
<p class="intro-exam-guide-lead">Để sử dụng được chức năng này, bạn làm theo hướng dẫn sau:</p>
<h4>Hướng dẫn chức năng chấm theo mã đề</h4>
<ol>
<li>Cài đặt app Mvip ScanQuiz trên điện thoại.</li>
<li>Đăng nhập bằng tài khoản của bạn trên điện thoại.</li>
<li>Vào Cài đặt → bật nút “Cho phép vào Quản lí trên web”.</li>
<li>Vào Menu → Quản lí → Soạn đề kiểm tra.</li>
<li>Thực hiện đầy đủ các bước từ bước 1 đến bước 5 của “Soạn đề kiểm tra”.</li>
<li>Phát đề cho học sinh làm bài và cho học sinh giơ thẻ trả lời; giáo viên dùng điện thoại quét thẻ MVIP của học sinh.</li>
</ol>
</div>
</div>
<section class="intro-showcase intro-showcase-legacy" hidden>
<div class="container">
<div class="intro-shell">
<div class="intro-hero-grid">
<div class="intro-copy">
<div class="intro-chip"><span class="intro-chip-dot"></span>Dành cho giáo viên trong lớp học số</div>
<h1 class="intro-title">
<span class="intro-brand-name">MVIP</span>
<span class="title-line">Nền tảng dạy học</span>
<span class="title-line intro-title-accent">tương tác đa năng</span>
</h1>
<p class="intro-text">Trình chiếu tài liệu, tổ chức bài giảng, tương tác với học sinh và kiểm tra kết quả trên cùng một không gian — để mỗi tiết dạy liền mạch, trực quan và chủ động hơn.</p>
<div class="intro-actions">
<a class="intro-action intro-action-primary" href="#dang-nhap">Bắt đầu sử dụng
<svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg>
</a>
<a class="intro-action intro-action-secondary" href="#mvip-capabilities">Khám phá chức năng</a>
</div>
<div class="intro-proof-list">
<span><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="m5 12 4 4L19 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2.2"/></svg>Trình chiếu đa định dạng</span>
<span><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="m5 12 4 4L19 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2.2"/></svg>Hiển thị công thức toán học</span>
<span><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="m5 12 4 4L19 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2.2"/></svg>Kết quả theo thời gian thực</span>
</div>
</div>

<div class="intro-product-visual" aria-label="Minh họa giao diện dạy học tương tác của MVIP">
<div class="intro-app-window">
<div class="intro-app-topbar">
<span class="intro-window-dots"><i></i><i></i><i></i></span>
<span class="intro-app-label">MVIP · Trình chiếu bài giảng</span>
<span class="intro-app-status">Đang kết nối</span>
</div>
<div class="intro-app-body">
<div class="intro-app-canvas">
<span class="intro-live-chip">Đang trình chiếu</span>
<div class="intro-lesson-kicker">TOÁN 8 · PHÂN THỨC</div>
<h3>Giá trị của phân thức tại x = 3 là</h3>
<p class="intro-question-text">Quan sát biểu thức và chọn phương án đúng:</p>
<div class="intro-math-row"><span class="intro-fraction"><span>2x + 1</span><span>x − 2</span></span><span>với&nbsp; x = 3</span></div>
<div class="intro-answer-grid"><span>A. 7</span><span>B. 5</span><span>C. 3</span><span>D. 1</span></div>
</div>
<aside class="intro-scan-panel">
<div class="intro-scan-head">Kết quả trực tiếp</div>
<strong class="intro-scan-total">32<span>/37</span></strong>
<div class="intro-scan-sub">học sinh đã trả lời</div>
<div class="intro-result-bars">
<div class="intro-result-row"><span>A</span><span class="intro-result-track"><i></i></span><span>5</span></div>
<div class="intro-result-row"><span>B</span><span class="intro-result-track"><i></i></span><span>20</span></div>
<div class="intro-result-row"><span>C</span><span class="intro-result-track"><i></i></span><span>4</span></div>
<div class="intro-result-row"><span>D</span><span class="intro-result-track"><i></i></span><span>3</span></div>
</div>
</aside>
</div>
<div class="intro-tool-row">
<span class="intro-tool"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="m4 20 4.4-1.1L19 8.3 15.7 5 5.1 15.6 4 20Z" stroke="currentColor" stroke-linejoin="round" stroke-width="1.8"/></svg>Bút viết</span>
<span class="intro-tool"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 19h16M7 15 17 5l2 2L9 17H7v-2Z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg>Bút nhớ</span>
<span class="intro-tool"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 7h16v10H4zM8 7v3m4-3v2m4-2v3" stroke="currentColor" stroke-linejoin="round" stroke-width="1.7"/></svg>Thước</span>
<span class="intro-tool"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 4h14v16H5zM8 8h8M8 12h8M8 16h5" stroke="currentColor" stroke-linecap="round" stroke-width="1.7"/></svg>Bảng trắng</span>
</div>
</div>
<div class="intro-float-card intro-float-formula"><b>ƒ(x)</b><span>MathType &amp; Equation</span></div>
<div class="intro-float-card intro-float-response"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M12 21a9 9 0 1 0 0-18 9 9 0 0 0 0 18Z" stroke="currentColor" stroke-width="1.8"/><path d="m8 12 2.5 2.5L16 9" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg>Nhận kết quả tức thời</div>
</div>
</div>

<div class="intro-format-strip" aria-label="Các định dạng tài liệu được MVIP hỗ trợ">
<div class="intro-format-lead">Một không gian trình chiếu cho</div>
<div class="intro-format-item"><span class="intro-format-icon">W</span>Word</div>
<div class="intro-format-item"><span class="intro-format-icon">PDF</span>PDF</div>
<div class="intro-format-item"><span class="intro-format-icon">X</span>Excel</div>
<div class="intro-format-item"><span class="intro-format-icon">P</span>PowerPoint</div>
</div>

<section class="intro-section" id="mvip-capabilities">
<div class="intro-section-heading">
<div><span class="intro-eyebrow">Năng lực cốt lõi</span><h2>Mọi công cụ cho một tiết dạy chủ động</h2></div>
<p>MVIP kết nối nội dung, tương tác và dữ liệu lớp học trong một quy trình quen thuộc với giáo viên.</p>
</div>
<div class="intro-feature-grid">
<article class="intro-feature-card intro-feature-wide intro-feature-blue">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 5h16v11H4zM8 20h8M12 16v4" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/><path d="m8 12 2.5-3 2 2 3-4 1.5 5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></div>
<h3>Trình chiếu tài liệu đa định dạng</h3>
<p>Mở trực tiếp Word, PDF, Excel và PowerPoint ngay trong MVIP; hỗ trợ giảng dạy, chú thích, phóng to và chia đôi màn hình mà không phải đổi qua nhiều ứng dụng.</p>
<div class="intro-feature-tags"><span>Word</span><span>PDF</span><span>Excel</span><span>PowerPoint</span><span>Chia đôi màn hình</span></div>
</article>
<article class="intro-feature-card intro-feature-mint">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 6h5l-3 6 3 6H4M12 8h8M12 16h8" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.9"/></svg></div>
<h3>Công thức toán học rõ ràng</h3>
<p>Nhận diện MathType và Equation, giữ kích thước, vị trí và cách căn công thức sát với tài liệu gốc.</p>
</article>
<article class="intro-feature-card intro-feature-compact">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 4h10a3 3 0 0 1 3 3v13H8a3 3 0 0 1-3-3V4Z" stroke="currentColor" stroke-linejoin="round" stroke-width="1.8"/><path d="M8 8h7M8 12h7" stroke="currentColor" stroke-linecap="round" stroke-width="1.8"/></svg></div>
<h3>Bài giảng &amp; câu hỏi MVIP</h3>
<p>Tổ chức nội dung bài dạy và sử dụng ngân hàng câu hỏi đã chuẩn bị ngay trong giờ học.</p>
</article>
<article class="intro-feature-card intro-feature-compact">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 9V5h4M16 5h4v4M20 15v4h-4M8 19H4v-4M8 9h8v6H8z" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></div>
<h3>Tương tác &amp; quét thẻ</h3>
<p>Thu câu trả lời bằng thẻ, theo dõi mức độ tham gia và xem kết quả lớp học theo thời gian thực.</p>
</article>
<article class="intro-feature-card intro-feature-compact">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M4 5h16v14H4zM8 15l3-3 2 2 3-4M7 8h.01" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></div>
<h3>Bảng trắng &amp; công cụ lớp học</h3>
<p>Viết, tô sáng, dùng thước, êke, compa, chụp vùng và dán ảnh ngay trên màn hình trình chiếu.</p>
</article>
<article class="intro-feature-card intro-feature-compact">
<div class="intro-feature-icon"><svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M7 3h8l4 4v14H7zM15 3v5h4M10 12h6M10 16h6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.8"/></svg></div>
<h3>Soạn đề, đề cương &amp; báo cáo</h3>
<p>Biên soạn nội dung, xuất Word, quản lý lớp–môn và lưu lịch sử kết quả để theo dõi thuận tiện.</p>
</article>
</div>
</section>

<section class="intro-section">
<div class="intro-flow">
<div class="intro-flow-head"><div><span class="intro-eyebrow">Một tiết dạy liền mạch</span><h2>Từ chuẩn bị đến kết quả</h2></div><p>Giữ nguyên mạch dạy học, giảm thao tác chuyển đổi và có dữ liệu ngay khi cần.</p></div>
<article class="intro-flow-step"><span class="intro-flow-number">01</span><h3>Chuẩn bị nội dung</h3><p>Mở tài liệu sẵn có hoặc chọn bài giảng, câu hỏi trong MVIP.</p></article>
<article class="intro-flow-step"><span class="intro-flow-number">02</span><h3>Trình chiếu &amp; tương tác</h3><p>Giảng bài, viết vẽ, chia màn hình và thu phản hồi ngay trong lớp.</p></article>
<article class="intro-flow-step"><span class="intro-flow-number">03</span><h3>Kiểm tra &amp; lưu kết quả</h3><p>Quét câu trả lời, xem thống kê và lưu lịch sử theo từng lớp–môn.</p></article>
</div>
</section>

<div class="intro-final-cta">
<div><h2>Sẵn sàng cho một giờ dạy linh hoạt hơn?</h2><p>Bắt đầu với MVIP và đưa nội dung, tương tác, kiểm tra về cùng một quy trình.</p></div>
<div class="intro-final-actions"><a class="intro-action intro-action-secondary" href="#dang-nhap">Đăng nhập</a><a class="intro-action intro-action-primary" href="#dang-ky">Đăng ký tài khoản<svg aria-hidden="true" fill="none" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"/></svg></a></div>
</div>
</div>
</div>
</section>
<section class="hero hidden-red-area">
<div class="container hero-grid">
<div class="panel hero-card">
<div class="tag">Trang web phụ trợ cho hệ thống MVIP</div>
<h1 class="hero-title">Đăng nhập và xem <span class="accent">kết quả quét</span> ngay trên website</h1>
<p class="hero-text">
            Trang này dùng cùng tài khoản với client MVIP. Sau khi đăng nhập, bạn có thể chọn Lớp-Môn,
            xem danh sách học sinh, theo dõi kết quả quét theo thời gian thực và mở lại lịch sử các câu đã lưu.
          </p>
<ul class="hero-list">
<li><span>•</span><div><b>Đăng nhập chung một tài khoản</b> với PC, Android và iPhone.</div></li>
<li><span>•</span><div><b>Nhận kết quả realtime</b> từ điện thoại quét thẻ qua WebSocket.</div></li>
<li><span>•</span><div><b>Xem lại lịch sử câu hỏi</b> đã lưu trên server theo từng Lớp-Môn.</div></li>
</ul>
<div class="merged-hero-actions">
<a class="nav-btn btn-primary" href="#dang-ky">Đăng ký tài khoản</a>
<a class="nav-btn btn-outline" href="#dang-nhap">Đăng nhập ngay</a>
<a class="nav-btn btn-soft" href="#taive">Tải ứng dụng</a>
</div>
</div>
<div class="panel hero-right">
<h3>Tóm tắt chức năng</h3>
<p>Thiết kế theo logic đang có của client: lấy dữ liệu lớp-môn từ <code>/api/class-data</code>, lấy lịch sử quét từ <code>/api/scan-history</code>, và nghe kết quả realtime qua <code>/api/ws/scan</code>.</p>
<div class="mini-grid">
<div class="mini"><strong id="heroClassCount">0</strong><span>Lớp-Môn đang có</span></div>
<div class="mini"><strong id="heroStudentCount">0</strong><span>Học sinh của lớp đang chọn</span></div>
<div class="mini"><strong id="heroSavedCount">0</strong><span>Câu đã lưu</span></div>
<div class="mini"><strong id="heroLiveCount">0</strong><span>Đã quét hiện tại</span></div>
</div>
</div>
</div>
</section>
<section class="block hidden-red-area" id="gioi-thieu-chi-tiet">
<div class="container">
<div class="section-head">
<div class="eyebrow">Tổng quan hệ thống</div>
<h2>Một trang duy nhất cho giới thiệu, đăng ký, đăng nhập và theo dõi kết quả</h2>
<p>Trang này đã gộp phần landing page và portal vào cùng một giao diện. Phần bảng realtime bên phải trong khu vực kết quả được giữ nguyên bố cục để bạn tiếp tục dùng quen tay.</p>
</div>
<div class="merged-grid-3">
<div class="panel merged-box">
<h3>1. Đăng ký tài khoản</h3>
<p>Tạo tài khoản ngay trên website, xác thực email rồi dùng chung cho PC, Android và iPhone.</p>
</div>
<div class="panel merged-box">
<h3>2. Đăng nhập và chọn Lớp-Môn</h3>
<p>Sau khi đăng nhập, hệ thống nạp dữ liệu lớp-môn đúng theo tài khoản hiện tại để xem quét realtime và lịch sử.</p>
</div>
<div class="panel merged-box">
<h3>3. Theo dõi kết quả quét</h3>
<p>Mở bảng kết quả, xem từng câu đã lưu, xem thống kê nhanh và xuất báo cáo khi cần.</p>
</div>
</div>
</div>
</section>
<section class="block hidden-red-area" id="huong-dan-su-dung">
<div class="container">
<div class="section-head">
<div class="eyebrow">Hướng dẫn sử dụng</div>
<h2>Các bước dùng MVIP trên website và client</h2>
<p>Bạn có thể dùng website để đăng ký, đăng nhập, theo dõi kết quả quét và xem lại dữ liệu đã lưu. Quy trình dưới đây bám đúng cách dùng thực tế của hệ thống.</p>
</div>
<div class="merged-grid-2">
<div class="panel merged-box">
<h3>Bước 1. Đăng ký hoặc xác thực lại tài khoản</h3>
<p>Nếu chưa có tài khoản, vào mục Đăng ký, điền đủ thông tin rồi kiểm tra email để xác thực.</p>
</div>
<div class="panel merged-box">
<h3>Bước 2. Đăng nhập đúng tài khoản đang sử dụng</h3>
<p>Dùng cùng tên đăng nhập và mật khẩu như trên client MVIP để website nạp đúng dữ liệu lớp - môn của tài khoản đó.</p>
</div>
<div class="panel merged-box">
<h3>Bước 3. Chọn Lớp - Môn và theo dõi kết quả</h3>
<p>Sau khi đăng nhập, chọn đúng Lớp - Môn để xem danh sách học sinh, dữ liệu realtime và lịch sử các câu đã lưu trên server.</p>
</div>
<div class="panel merged-box">
<h3>Bước 4. Quên mật khẩu thì gửi link đặt lại</h3>
<p>Bấm Quên mật khẩu, nhập email đã đăng ký. Nếu không nhớ email, bạn có thể nhập username để hệ thống gửi link đặt lại mật khẩu.</p>
</div>
</div>
</div>
</section>
<section class="block" id="dang-ky">
<div class="container">
<div class="section-head">
<div class="eyebrow">Đăng ký tài khoản</div>
</div>
<div class="auth-shell">
<div class="panel auth-card">
<h3>Biểu mẫu đăng ký</h3>
<form id="registerForm" novalidate="">
<div class="field-grid register-inline-grid">
<div class="field">
<label for="reg_full_name">Họ và tên</label>
<input autocomplete="name" id="reg_full_name" name="full_name" required="" type="text"/>
</div>
<div class="field">
<label for="reg_phone">Điện thoại</label>
<input autocomplete="tel" id="reg_phone" name="phone" required="" type="tel"/>
</div>
<div class="field">
<label for="reg_email">Email</label>
<div class="register-email-input-stack">
<input autocomplete="email" id="reg_email" maxlength="100" name="email" required="" type="email"/>
<div aria-live="polite" class="register-email-check-status" data-state="idle" id="registerEmailCheckStatus"></div>
</div>
</div>
<div class="field">
<label for="reg_username">Tên đăng nhập</label>
<input aria-readonly="true" autocomplete="username" id="reg_username" maxlength="100" name="username" placeholder="Tự động lấy theo email" readonly="" title="Tên đăng nhập được tạo tự động từ email" type="text"/>
</div>
<div class="field">
<label for="reg_password">Đặt mật khẩu</label>
<div class="password-input-wrap">
<input autocomplete="new-password" id="reg_password" name="password" placeholder="Tối thiểu 6 ký tự" required="" type="password"/>
<button aria-label="Hiện mật khẩu" aria-pressed="false" class="password-toggle" data-password-target="reg_password" title="Hiện mật khẩu" type="button">
<svg aria-hidden="true" class="eye-icon" viewBox="0 0 24 24"><path d="M2.5 12s3.5-6 9.5-6 9.5 6 9.5 6-3.5 6-9.5 6S2.5 12 2.5 12Z"></path><circle cx="12" cy="12" r="2.75"></circle></svg>
<svg aria-hidden="true" class="eye-off-icon" viewBox="0 0 24 24"><path d="M2.5 12s3.5-6 9.5-6 9.5 6 9.5 6-3.5 6-9.5 6S2.5 12 2.5 12Z"></path><circle cx="12" cy="12" r="2.75"></circle><path d="M3 3l18 18"></path></svg>
</button>
</div>
</div>
<div class="field">
<label for="reg_password2">Nhập lại mật khẩu</label>
<div class="password-input-wrap">
<input autocomplete="new-password" id="reg_password2" name="password2" placeholder="Nhập lại đúng mật khẩu ở trên" required="" type="password"/>
<button aria-label="Hiện mật khẩu nhập lại" aria-pressed="false" class="password-toggle" data-password-target="reg_password2" title="Hiện mật khẩu nhập lại" type="button">
<svg aria-hidden="true" class="eye-icon" viewBox="0 0 24 24"><path d="M2.5 12s3.5-6 9.5-6 9.5 6 9.5 6-3.5 6-9.5 6S2.5 12 2.5 12Z"></path><circle cx="12" cy="12" r="2.75"></circle></svg>
<svg aria-hidden="true" class="eye-off-icon" viewBox="0 0 24 24"><path d="M2.5 12s3.5-6 9.5-6 9.5 6 9.5 6-3.5 6-9.5 6S2.5 12 2.5 12Z"></path><circle cx="12" cy="12" r="2.75"></circle><path d="M3 3l18 18"></path></svg>
</button>
</div>
</div>
</div>
<div class="register-actions-row">
<button class="nav-btn btn-primary" id="registerSubmitBtn" type="submit">Gửi đăng ký</button>
</div>
</form>
</div>
<div class="panel dashboard-card">
<h3>Hướng dẫn đăng ký</h3>
<div class="detail-grid">
<div class="meta-box"><div class="t">Bước 1</div><div class="n" style="font-size:18px;">Điền biểu mẫu; hệ thống kiểm tra chính sách email</div></div>
<div class="meta-box"><div class="t">Bước 2</div><div class="n" style="font-size:18px;">Mở thư MVIP để xác thực quyền sở hữu email</div></div>
<div class="meta-box"><div class="t">Bước 3</div><div class="n" style="font-size:18px;">Đăng nhập và sử dụng</div></div>
</div>
</div>
</div>
</div>
</section>
<div class="register-notice-modal" id="registerNoticeModal" hidden>
<div class="register-notice-backdrop" data-register-notice-close=""></div>
<section aria-describedby="registerNoticeMessage" aria-labelledby="registerNoticeTitle" aria-modal="true" class="register-notice-dialog" id="registerNoticeDialog" role="dialog">
<button aria-label="Đóng thông báo" class="register-notice-close" data-register-notice-close="" type="button">×</button>
<div aria-hidden="true" class="register-notice-icon" id="registerNoticeIcon">✓</div>
<h3 class="register-notice-title" id="registerNoticeTitle">Vui lòng xác thực email để hoàn tất đăng ký</h3>
<div class="register-notice-message" id="registerNoticeMessage"></div>
<button class="nav-btn btn-primary register-notice-ok" id="registerNoticeOkBtn" type="button">Đã hiểu</button>
</section>
</div>
<section class="block" id="dang-nhap">
<div class="container">
<div class="section-head">
<div class="eyebrow">Đăng nhập MVIP</div>
<h2 id="mvipLearningMotto">HỌC VUI - VUI ĐỂ HỌC. DẠY VUI - VUI ĐỂ DẠY</h2>
<div class="note" id="accountDataNote" style="margin-top:10px;display:none;"></div>
</div>
<div class="auth-shell">
<div class="panel auth-card">
<h3>Biểu mẫu đăng nhập</h3>
<form id="loginForm" novalidate="">
<div class="field-grid">
<div class="field">
<label for="username">Tên đăng nhập</label>
<div class="saved-account-combo" id="savedAccountCombo">
<input aria-autocomplete="list" aria-controls="savedAccountMenu" aria-expanded="false" autocomplete="username" id="username" name="username" placeholder="Ví dụ: nguyenvana" required="" role="combobox" type="text"/>
<button aria-controls="savedAccountMenu" aria-expanded="false" aria-label="Chọn tài khoản đã lưu" class="saved-account-toggle" id="savedAccountToggle" title="Chọn tài khoản đã lưu" type="button">
<svg aria-hidden="true" viewBox="0 0 24 24"><path d="M7 9.5 12 14.5 17 9.5"></path></svg>
</button>
<div aria-label="Các tài khoản đã lưu" class="saved-account-menu" hidden="" id="savedAccountMenu" role="listbox"></div>
<select aria-hidden="true" hidden="" id="savedAccountSelect" tabindex="-1">
<option value="">Chọn tài khoản đã lưu</option>
</select>
</div>
</div>
<div class="field">
<label for="password">Mật khẩu</label>
<input autocomplete="current-password" id="password" name="password" placeholder="Nhập mật khẩu" required="" type="password"/>
</div>
</div>
<div class="actions" style="margin-top:16px;">
<button class="nav-btn btn-primary" id="loginBtn" type="submit">Đăng nhập</button>
<button class="nav-btn btn-soft" id="forgotPasswordBtn" type="button">Quên mật khẩu</button>
<button class="nav-btn nav-logout-btn" disabled="" id="logoutBtn" type="button">Đăng xuất</button>
</div>
<div aria-live="polite" class="status" id="loginStatus"></div>
</form>
</div>
<div class="panel dashboard-card">
<h3>Hướng dẫn khi không đăng nhập được</h3>
<p class="sub">Nếu bạn quên tài khoản hoặc mật khẩu vui lòng bấm nút "Quên mật khẩu" bên cạnh, nhập email đã đăng ký, bấm OK, sau đó vào email xem tên tài khoản và đặt lại mật khẩu.</p>
</div>
</div>
</div>
</section>
<section class="block hidden-red-area" id="bang-dieu-khien">
<div class="container">
<div class="section-head">
<div class="eyebrow">Kết quả quét</div>
<h2>Kết quả quét theo Lớp-Môn</h2>
<p>Chọn một Lớp-Môn để nạp danh sách học sinh, nhận kết quả quét đang chạy và xem lịch sử các câu đã lưu.</p>
</div>
<div class="dashboard-shell">
<div class="toolbar">
<div class="toolbar-left">
<span class="pill offline" id="authStatePill"><span class="dot"></span><span id="authStateText">Chưa đăng nhập</span></span>
<span class="pill offline" id="wsStatePill"><span class="dot"></span><span id="wsStateText">Realtime chưa kết nối</span></span>
</div>
<div class="toolbar-right">
<div class="field" style="min-width: 280px; max-width: 340px; margin:0;">
<select id="classSubjectSelect">
<option value="">Chọn Lớp-Môn</option>
</select>
</div>
<button class="nav-btn btn-outline" disabled="" id="refreshBtn" type="button">Làm mới dữ liệu</button>
<button class="nav-btn btn-soft" disabled="" id="clearLiveBtn" type="button">Xóa bảng hiện tại</button>
</div>
</div>
<div class="stats-grid">
<div class="stat"><div class="label">Lớp-Môn</div><div class="value" id="classCount">0</div></div>
<div class="stat"><div class="label">Học sinh lớp đang chọn</div><div class="value" id="studentCount">0</div></div>
<div class="stat"><div class="label">Đã quét hiện tại</div><div class="value" id="liveCount">0</div></div>
<div class="stat"><div class="label">Câu đã lưu</div><div class="value" id="savedCount">0</div></div>
</div>
<div class="workspace">
<div class="panel current-board">
<div class="board-head">
<div>
<h4 id="currentBoardTitle">Bảng học sinh đang quét</h4>
<div class="muted" id="currentBoardSub">Đăng nhập và chọn Lớp-Môn để xem dữ liệu.</div>
</div>
<button class="exam-mode-exit-btn" hidden="" id="examModeExitBtn" type="button">Thoát</button>
</div>
<div class="scan-controls scan-controls-merged">
<div class="scan-controls-left">
<div class="compact-class-wrap compact-class-wrap-inline">
<select id="compactClassSubjectSelect">
<option value="">Chọn Lớp-Môn</option>
</select>
</div>
<button class="answer-btn" disabled="" id="correctBtnA" type="button">A</button>
<button class="answer-btn" disabled="" id="correctBtnB" type="button">B</button>
<button class="answer-btn" disabled="" id="correctBtnC" type="button">C</button>
<button class="answer-btn" disabled="" id="correctBtnD" type="button">D</button>
<label class="mini-control">cỡ
                    <select id="fontSizeSelect">
<option>16</option><option>17</option><option>18</option><option>19</option><option>20</option>
<option>21</option><option selected="">22</option><option>23</option><option>24</option>
</select>
</label>
<div class="menu-wrap" id="actionMenuWrap">
<button aria-expanded="false" class="menu-btn" id="actionMenuBtn" type="button">Menu ▾</button>
<div class="menu-panel" id="actionMenuPanel">
<button class="menu-item" disabled="" id="menuResultsBtn" onclick="event.preventDefault(); event.stopPropagation(); if (typeof openReportModal === 'function') openReportModal();" type="button">Kết quả</button>
<a class="menu-item" href="/downloads/The_Mvip.pdf" id="menuDownloadCardsBtn" onclick="if (typeof closeActionMenu === 'function') closeActionMenu();" rel="noopener" target="_blank">Tải thẻ</a>
<button class="menu-item" disabled="" id="menuClassManagerBtn" type="button">Quản lí</button>
</div>
</div>
</div>
</div>
<div class="scan-mode-row">
<input disabled="" hidden="" id="useExamCodesCheckbox" type="checkbox"/>
<button class="exam-mode-enter-btn" disabled="" id="examModeEnterBtn" type="button">Chấm theo mã đề</button>
<button class="regular-test-start-btn" disabled="" id="regularTestStartBtn" type="button">Dùng câu hỏi của Mvip</button>
<div class="exam-mode-extra" hidden="" id="examModeExtra">
<div class="exam-mode-top">
<select aria-label="Đề số" class="exam-select-control" disabled="" id="examSerialSelect">
<option value="">Đề số</option>
</select>
<span class="exam-question-chip" id="examQuestionLabel">Câu 1</span>
<button class="exam-done-btn" disabled="" id="examDoneBtn" type="button">Xem</button>
<button aria-label="Lưu và sang câu tiếp" class="menu-btn finish-auto-btn" disabled="" hidden="" id="finishAutoBtn" type="button"><svg aria-hidden="true" class="finish-auto-icon" focusable="false" viewBox="0 0 24 24"><path d="M5 12h14M13 6l6 6-6 6" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2.4"></path></svg></button>
<button class="menu-btn exam-rescan-btn" disabled="" hidden="" id="examRescanBtn" type="button">Hủy/quét lại</button>
<label class="exam-hide-code-toggle" hidden="" id="hideExamCodesLabel">
<input disabled="" id="hideExamCodesCheckbox" type="checkbox"/>
<span>Ẩn mã đề</span>
</label>
<label class="exam-inline-control" hidden="" id="examFontSizeWrap">
<span>Cỡ</span>
<select aria-label="Cỡ chữ" disabled="" id="examFontSizeSelect">
<option>16</option><option>17</option><option>18</option><option>19</option><option>20</option>
<option>21</option><option selected="">22</option><option>23</option><option>24</option>
</select>
</label>
<label class="exam-inline-control columns" hidden="" id="examColumnCountWrap">
<span>Cột</span>
<select aria-label="Số cột hiển thị" disabled="" id="examColumnCountSelect">
<option value="4">4 cột</option>
<option selected="" value="5">5 cột</option>
<option value="6">6 cột</option>
</select>
</label>
</div>
</div>
</div>
<div class="summary-row">
<div class="summary-box"><div class="k">Đã trả lời</div><div class="v" id="sumAnswered">0</div></div>
<div class="summary-box"><div class="k">A</div><div class="v" id="sumA">0</div></div>
<div class="summary-box"><div class="k">B</div><div class="v" id="sumB">0</div></div>
<div class="summary-box"><div class="k">C</div><div class="v" id="sumC">0</div></div>
<div class="summary-box"><div class="k">D</div><div class="v" id="sumD">0</div></div>
</div>
<div class="student-board-shell" id="studentBoardShell">
<div class="student-board" id="studentBoard">
<div aria-hidden="true" class="mvip-no-class-classroom" id="mvipNoClassClassroom">
<img alt="Lớp học tương tác: bảng hiển thị câu hỏi MVIP hỗ trợ công tác gì, giáo viên giơ điện thoại quét các thẻ có chữ Mvip của học sinh" decoding="async" 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<div class="board-head">
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<h4>Lịch sử câu hỏi đã lưu</h4>
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</div>
</div>
<div class="table-wrap">
<table>
<thead>
<tr>
<th>Câu</th>
<th>Ngày giờ</th>
<th>Đúng</th>
<th>Trả lời</th>
<th>Tỷ lệ</th>
</tr>
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<h2>Tải MVIP trên nền tảng phù hợp</h2>
<p>Bản website này dành cho theo dõi và thao tác nhanh. Để quét thẻ và vận hành chính, bạn vẫn cài ứng dụng trên PC hoặc điện thoại.</p>
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<h3 style="margin:0 0 10px; font-size:28px;">Tải MVIP cho PC, Android và iPhone</h3>
<p class="sub" style="margin:0;">Chọn nền tảng phù hợp để cài đặt ứng dụng. Link bản PC đã cấu hình sẵn. Link App Store và CH Play đang để chỗ chờ bạn thay vào.</p>
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<h2>Thông tin liên hệ</h2>
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<h3>MVIP ScanQuiz</h3>
<ul>
<li><b>Website:</b> <a href="https://mvip.vn">https://mvip.vn</a></li>
<li><b>Email hỗ trợ:</b> <a href="mailto:mvip.scanquiz@gmail.com">mvip.scanquiz@gmail.com</a></li>
<li><b>Điện thoại:</b> <a href="tel:0835399789">0835 399 789</a></li>
<li><b>Thời gian hỗ trợ:</b> Thứ 2 - Thứ 6, 08:00 - 17:00</li>
</ul>
</div>
<div class="panel merged-box">
<h3>Link dùng cho store</h3>
<ul>
<li><b>URL hỗ trợ:</b> <a href="https://mvip.vn/#lienhe">https://mvip.vn/#lienhe</a></li>
<li><b>URL tiếp thị:</b> <a href="https://mvip.vn">https://mvip.vn</a></li>
<li><b>Chính sách quyền riêng tư:</b> <a href="https://mvip.vn/#quyen-rieng-tu">https://mvip.vn/#quyen-rieng-tu</a></li>
</ul>
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<div class="eyebrow">Chính sách quyền riêng tư</div>
<h2>Chính sách quyền riêng tư của MVIP</h2>
<p>Áp dụng cho website MVIP (mvip.vn) và ứng dụng MVIP ScanQuiz trên Android, iOS. Cập nhật ngày 10/10/2026.</p>
</div>
<div class="panel policy-box">
<h3>1. Phạm vi áp dụng và nguyên tắc xử lý</h3>
<p>MVIP cung cấp công cụ dạy học tương tác, quét thẻ trả lời và điều khiển trình chiếu. Chúng tôi xử lý những dữ liệu cần thiết để cung cấp các chức năng này, quản lý tài khoản và bảo vệ hệ thống. Dữ liệu được sử dụng theo các mục đích được mô tả dưới đây; chính sách này không thay thế những thông báo riêng được hiển thị khi một tính năng cần quyền truy cập bổ sung.</p>
<h3>2. Những loại dữ liệu MVIP xử lý</h3>
<ul>
<li><b>Tài khoản và xác thực:</b> tên đăng nhập, thông tin đăng nhập cần thiết để xác thực, trạng thái tài khoản và thông tin lớp – môn gắn với tài khoản.</li>
<li><b>Mã nhận dạng thiết bị hoặc mã nhận dạng khác:</b> khi đăng nhập ứng dụng MVIP ScanQuiz trên Android hoặc iOS, mã nhận dạng thiết bị và tên/loại thiết bị được gửi đến máy chủ MVIP để xác thực điện thoại, quản lý đăng nhập và hỗ trợ chuyển sang điện thoại mới. Trên <b>Android</b>, ứng dụng sử dụng <code>ANDROID_ID</code> (hoặc mã do ứng dụng tạo nếu không đọc được mã đó). Trên <b>iOS</b>, ứng dụng tạo một mã riêng (<code>UUID</code>) và lưu trong Keychain để dùng lại khi đăng nhập. Các mã này phục vụ chức năng xác thực thiết bị của MVIP, không dùng cho mục đích quảng cáo.</li>
<li><b>Dữ liệu lớp học và bài kiểm tra:</b> lớp, môn học, thông tin học sinh do người dùng nhập và quản lý, mã thẻ trả lời, phương án trả lời, điểm số và kết quả kiểm tra.</li>
<li><b>Hoạt động sử dụng chức năng:</b> những thao tác cần thiết để đồng bộ kết quả quét thẻ và điều khiển MVIP. Lệnh điều khiển có thể được truyền trực tiếp giữa điện thoại và máy tính qua WebRTC, hoặc đi qua máy chủ khi sử dụng đường dự phòng.</li>
</ul>
<h3>3. Camera và dữ liệu quét thẻ</h3>
<p>Ứng dụng dùng camera để nhận diện thẻ trả lời. Trong chức năng quét thẻ, hình ảnh camera được phân tích trên thiết bị để xác định mã thẻ và lựa chọn trả lời; kết quả nhận diện được gửi tới hệ thống MVIP để ghi nhận và tổng hợp. Quyền camera chỉ phục vụ các tính năng cần sử dụng camera.</p>
<h3>4. Mục đích sử dụng dữ liệu</h3>
<ul>
<li>Xác thực tài khoản, nhận dạng thiết bị và bảo vệ việc truy cập tài khoản.</li>
<li>Quản lý lớp – môn; nhận, tổng hợp, lưu và hiển thị kết quả quét thẻ phục vụ giảng dạy và kiểm tra.</li>
<li>Đồng bộ trạng thái và thực hiện lệnh điều khiển trình chiếu giữa điện thoại và máy tính.</li>
<li>Hỗ trợ người dùng, xử lý lỗi và bảo đảm hệ thống hoạt động ổn định, an toàn.</li>
</ul>
<h3>5. Chia sẻ dữ liệu</h3>
<p>MVIP không bán dữ liệu cá nhân và không sử dụng mã nhận dạng thiết bị để bán quảng cáo. Dữ liệu phục vụ ứng dụng được truyền tới hệ thống MVIP và xử lý để cung cấp dịch vụ. Nếu có nhà cung cấp hạ tầng hoặc bên xử lý dữ liệu thực hiện công việc thay mặt MVIP, họ chỉ được tiếp cận dữ liệu trong phạm vi cần thiết và theo nghĩa vụ bảo mật phù hợp. MVIP có thể cung cấp thông tin khi có yêu cầu hợp pháp từ cơ quan có thẩm quyền.</p>
<h3>6. Bảo mật dữ liệu</h3>
<p>MVIP áp dụng biện pháp kiểm soát truy cập và sử dụng kết nối bảo mật như HTTPS/WSS đối với các chức năng gửi dữ liệu về máy chủ. Kênh điều khiển WebRTC trực tiếp sử dụng cơ chế mã hóa của WebRTC. Không có phương thức truyền hoặc lưu trữ nào bảo đảm an toàn tuyệt đối; khi phát hiện vấn đề bảo mật, người dùng có thể thông báo qua kênh hỗ trợ dưới đây.</p>
<h3>7. Thời gian lưu giữ và yêu cầu xóa dữ liệu</h3>
<p>MVIP lưu dữ liệu trong thời gian cần thiết để duy trì tài khoản, cung cấp chức năng được yêu cầu, quản lý kết quả học tập và xử lý các nghĩa vụ có liên quan. Thời gian lưu cụ thể có thể khác nhau tùy loại dữ liệu và nhu cầu sử dụng các chức năng của tài khoản cá nhân. Khi dữ liệu không còn cần thiết hoặc có yêu cầu hợp lệ, MVIP sẽ xem xét xóa hoặc ẩn danh dữ liệu; một phần dữ liệu có thể cần tiếp tục lưu giữ để đáp ứng nghĩa vụ pháp luật hoặc giải quyết tranh chấp.</p>
<p><b>Cách yêu cầu xóa dữ liệu:</b> gửi email đến <a href="mailto:mvip.scanquiz@gmail.com?subject=Y%C3%AAu%20c%E1%BA%A7u%20x%C3%B3a%20d%E1%BB%AF%20li%E1%BB%87u%20MVIP">mvip.scanquiz@gmail.com</a> với tiêu đề <b>“Yêu cầu xóa dữ liệu MVIP”</b>. Nêu tên tài khoản (không gửi mật khẩu), thông tin liên hệ và phạm vi muốn xóa (ví dụ: dữ liệu quét thẻ, kết quả lớp học hoặc dữ liệu tài khoản). MVIP sẽ xác minh quyền yêu cầu, thông báo kết quả xử lý và lý do nếu có thông tin cần được giữ lại.</p>
<h3>8. Quyền của người dùng và liên hệ</h3>
<p>Người dùng có thể yêu cầu tìm hiểu, chỉnh sửa thông tin không chính xác hoặc yêu cầu xóa dữ liệu thuộc phạm vi quyền quản lý của mình qua email <a href="mailto:mvip.scanquiz@gmail.com">mvip.scanquiz@gmail.com</a>. Có thể xem thêm thông tin tại <a href="https://mvip.vn/#lienhe">mục Liên hệ MVIP</a>. Không gửi mật khẩu qua email. Người dùng cần sử dụng thông tin học sinh đúng mục đích giáo dục và có trách nhiệm bảo vệ những dữ liệu đã nhập vào MVIP.</p>
<h3>9. Cập nhật chính sách</h3>
<p>Khi thay đổi cách thu thập hoặc xử lý dữ liệu, MVIP sẽ cập nhật nội dung tại địa chỉ <a href="https://mvip.vn/#quyen-rieng-tu">https://mvip.vn/#quyen-rieng-tu</a> và ghi ngày cập nhật để người dùng có thể theo dõi.</p>
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<span aria-live="polite" class="word-presentation-httc-badge" hidden="" id="wordPresentationHttcBadge"></span>
<button aria-pressed="false" class="word-presentation-all-btn" id="wordPresentationAllBtn" title="Hiển thị toàn bộ câu hỏi theo thứ tự trong file Word" type="button">Tất cả</button>
<button aria-expanded="false" aria-haspopup="dialog" class="word-presentation-choose-question-btn" disabled="" id="wordPresentationChooseQuestionBtn" title="Phóng to toàn màn hình và mở bảng chọn câu trình chiếu" type="button">Chọn câu</button>
<input aria-hidden="true" autocomplete="off" hidden="" id="wordPresentationJumpInput" inputmode="decimal" min="1" step="any" tabindex="-1" type="number"/>
<button aria-hidden="true" hidden="" id="wordPresentationJumpBtn" tabindex="-1" type="button">Xem</button>
<button aria-label="Quét vùng để phóng to" class="word-presentation-region-btn" id="wordPresentationRegionBtn" title="Quét vùng" type="button">Quét vùng</button>
<select aria-label="Số giây đếm ngược của Trình chiếu Word" class="word-presentation-countdown-input" id="wordPresentationCountdownInput" title="Chọn số giây. Khi bấm Toàn màn hình hoặc chuyển sang câu khác, đồng hồ sẽ đếm ngược; khi về 0 chỉ phát chuông, không tự thu nhỏ. Bấm đồng hồ đang chạy để dừng và chọn lại thời gian.">
<option value="">Số giây</option>
<option value="15">15s</option>
<option value="30">30s</option>
<option value="45">45s</option>
<option value="60">60s</option>
<option value="120">120s</option>
<option value="180">180s</option>
<option value="240">240s</option>
<option value="300">300s</option>
<option value="360">360s</option>
<option value="420">420s</option>
<option value="480">480s</option>
<option value="540">540s</option>
<option value="600">600s</option>
</select>
<button aria-label="Phóng to toàn màn hình" aria-pressed="false" class="word-presentation-fullscreen-btn" id="wordPresentationFullscreenBtn" title="Phóng to toàn màn hình" type="button"><svg aria-hidden="true" class="word-presentation-fullscreen-icon" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M14 10L21 3M16 3H21V8M10 14L3 21M8 21H3V16" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg></button>
<button aria-label="Câu trước" class="word-presentation-nav-btn" id="wordPresentationPrevBtn" title="Câu trước" type="button">&#8592;</button>
<button aria-label="Câu sau" class="word-presentation-nav-btn" id="wordPresentationNextBtn" title="Câu sau" type="button">&#8594;</button>
<button aria-label="Đóng trình chiếu Word" class="word-presentation-close-btn" id="wordPresentationCloseBtn" title="Đóng" type="button">X</button>
</div>
</div>
<div aria-label="Điều khiển trình chiếu PowerPoint" class="powerpoint-presentation-controls" hidden="" id="powerPointPresentationControls" role="toolbar">
<button aria-label="Trang chiếu trước" id="powerPointPresentationPrevBtn" title="Trang chiếu trước (←, Page Up)" type="button">&#8249;</button>
<button aria-label="Tự động trình chiếu" aria-pressed="false" class="powerpoint-presentation-play-btn" id="powerPointPresentationPlayBtn" title="Tự động trình chiếu" type="button">&#9654;</button>
<span aria-live="polite" class="powerpoint-presentation-counter" id="powerPointPresentationCounter">0 / 0</span>
<button aria-label="Trang chiếu tiếp theo" id="powerPointPresentationNextBtn" title="Hiệu ứng hoặc trang chiếu tiếp theo (→, Space)" type="button">&#8250;</button>
<button aria-label="Toàn màn hình" id="powerPointPresentationFullscreenBtn" title="Toàn màn hình (F5)" type="button">&#9974;</button>
<button aria-label="Thoát trình chiếu PowerPoint" class="powerpoint-presentation-close-btn" id="powerPointPresentationCloseBtn" title="Thoát trình chiếu" type="button">&#215;</button>
</div>
<div aria-live="polite" class="word-presentation-access-banner" hidden="" id="wordPresentationAccessBanner">
<div class="word-presentation-access-message" id="wordPresentationAccessMessage"></div>
<button class="word-presentation-access-action" id="wordPresentationAccessActionBtn" type="button"></button>
</div>
<div aria-hidden="true" aria-labelledby="wordPresentationQuestionPickerTitle" aria-modal="true" class="word-presentation-question-picker-modal" hidden="" id="wordPresentationQuestionPickerModal" role="dialog">
<div class="word-presentation-question-picker-backdrop" data-word-question-picker-close="1"></div>
<section class="word-presentation-question-picker-dialog">
<div class="word-presentation-question-picker-head">
<div class="word-presentation-question-picker-head-text">
<h3 id="wordPresentationQuestionPickerTitle">Chọn câu trình chiếu</h3>
<div aria-live="polite" class="word-presentation-question-picker-summary" id="wordPresentationQuestionPickerSummary"></div>
</div>
<button class="word-presentation-question-picker-close" id="wordPresentationQuestionPickerCloseBtn" type="button">Đóng</button>
</div>
<div class="word-presentation-question-picker-grid-wrap">
<div class="word-presentation-question-picker-grid" id="wordPresentationQuestionPickerBody"></div>
</div>
</section>
</div>
<div class="word-presentation-viewport" id="wordPresentationViewport">
<div class="word-presentation-fit-layer" id="wordPresentationFitLayer">
<article class="word-presentation-card is-loading" id="wordPresentationCard">
<div>Chọn file Word để bắt đầu trình chiếu.</div>
</article>
</div>
</div>
<div class="word-presentation-answer-modal" hidden="" id="wordPresentationAnswerModal">
<div class="word-presentation-answer-backdrop" data-word-answer-close="1"></div>
<section aria-labelledby="wordPresentationAnswerTitle" aria-modal="true" class="word-presentation-answer-dialog" role="dialog">
<div class="word-presentation-answer-head">
<h3 id="wordPresentationAnswerTitle">Đáp án</h3>
<button class="word-presentation-answer-close" id="wordPresentationAnswerCloseBtn" type="button">Đóng</button>
</div>
<div class="word-presentation-answer-content" id="wordPresentationAnswerContent"></div>
</section>
</div>
<div aria-hidden="true" class="word-presentation-image-zoom-modal" hidden="" id="wordPresentationImageZoomModal">
<div class="word-presentation-image-zoom-backdrop" data-word-image-zoom-close="1"></div>
<section aria-labelledby="wordPresentationImageZoomTitle" aria-modal="true" class="word-presentation-image-zoom-dialog" role="dialog">
<div class="word-presentation-image-zoom-head">
<strong id="wordPresentationImageZoomTitle">Hình ảnh phóng to</strong>
<button class="word-presentation-image-zoom-close" id="wordPresentationImageZoomCloseBtn" type="button">Đóng</button>
</div>
<div class="word-presentation-image-zoom-body" id="wordPresentationImageZoomBody">
<div class="word-presentation-image-zoom-content" id="wordPresentationImageZoomContent"></div>
<div class="word-presentation-image-zoom-hint">Bấm nền tối, nút Đóng hoặc phím Esc để trở lại</div>
</div>
</section>
</div>
</div>
<div class="regular-test-modal" hidden="" id="regularTestModal">
  <div class="regular-test-backdrop" data-regular-test-close="1"></div>
  <div aria-labelledby="regularTestTitle" aria-modal="true" class="regular-test-dialog" role="dialog">
    <div class="regular-test-head">
      <div>
        <h3 id="regularTestTitle">Kiểm tra bằng câu hỏi của Mvip</h3>
        <p id="regularTestClassText">Chọn lớp-môn trước khi bắt đầu.</p>
      </div>
      <button class="nav-btn btn-outline" id="regularTestCloseBtn" type="button">Đóng</button>
    </div>
    <div class="regular-test-body">
      <section aria-hidden="true" class="regular-test-step" hidden="">
        <h4 class="regular-test-step-title">Ngân hàng đề tự động</h4>
        <div class="regular-test-bank-row">
          <label for="regularTestBankSelect">Ngân hàng đề
            <select id="regularTestBankSelect"></select>
          </label>
          <button class="nav-btn btn-primary" id="regularTestLoadBankBtn" type="button">Nạp ngân hàng đề</button>
        </div>
        <div class="regular-test-status" id="regularTestBankStatus">Chưa tải danh mục ngân hàng đề.</div>
      </section>
      <div class="regular-test-top-status" hidden id="regularTestTopStatus"></div>
      <section class="regular-test-step">
        <h4 class="regular-test-step-title">Bước 1. Soạn câu hỏi</h4>
        <div class="regular-test-note">Phần mềm tự nạp ngân hàng đề đúng môn, lớp đang chọn. Giáo viên chọn số câu TNKQ nhiều lựa chọn hoặc Đúng - Sai theo từng nội dung/đơn vị kiến thức và mức độ đánh giá.</div>
        <div class="regular-test-actions">
          <button class="nav-btn btn-primary" id="regularTestOpenMatrixBtn" type="button">Soạn câu hỏi</button>
        </div>
        <div class="regular-test-summary" id="regularTestMatrixSummary">Chưa chọn câu hỏi.</div>
      </section>
      <section class="regular-test-step">
        <h4 class="regular-test-step-title">Bước 2. Chấm kiểm tra</h4>
        <div class="regular-test-note">Phần mềm sinh một bộ câu hỏi, trình chiếu lần lượt từng câu, nhận thẻ của học sinh và lưu từng câu vào <b>Kết quả thường xuyên</b>.</div>
        <div class="regular-test-actions">
          <button class="nav-btn btn-primary" id="regularTestBeginBtn" type="button">Sinh đề</button>
        </div>
        <div class="regular-test-status" id="regularTestRunStatus"></div>
      </section>
    </div>
  </div>
</div>
<div class="regular-nobank-modal" hidden="" id="regularTestNoBankModal">
  <div class="regular-nobank-backdrop" data-regular-nobank-close="1"></div>
  <div aria-label="Thông báo chưa có ngân hàng câu hỏi" aria-modal="true" class="regular-nobank-dialog" role="dialog">
    <div class="regular-nobank-message" id="regularTestNoBankText">Xin lỗi, hiện tại môn ... lớp ... này hệ thống chưa có ngân hàng câu hỏi</div>
    <div class="regular-nobank-actions">
      <button class="nav-btn btn-outline" id="regularTestNoBankCloseBtn" type="button">Đóng</button>
    </div>
  </div>
</div>
<div class="regular-choice-modal document-presentation-choice-modal" hidden="" id="documentPresentationChoiceModal">
  <div class="regular-choice-backdrop" data-document-presentation-choice-close="1"></div>
  <div aria-labelledby="documentPresentationChoiceTitle" aria-modal="true" class="regular-choice-dialog document-presentation-choice-dialog" role="dialog">
    <div class="regular-choice-head">
      <div>
        <h3 id="documentPresentationChoiceTitle">Trình chiếu tài liệu</h3>
        <p>Chọn cách trình chiếu phù hợp với tài liệu của bạn.</p>
      </div>
      <button class="nav-btn btn-outline" id="documentPresentationChoiceCloseBtn" type="button">Đóng</button>
    </div>
    <div class="regular-choice-body">
      <div class="regular-choice-actions document-presentation-choice-actions">
        <button hidden="" id="documentPresentationPowerPointBtn" type="button">Trình chiếu PowerPoint</button>
        <button class="nav-btn btn-primary" id="documentPresentationOrdinaryBtn" type="button">Trình chiếu PowerPoint, Word, PDF, Excel</button>
        <button class="nav-btn btn-outline" id="documentPresentationQuestionBtn" type="button">Trình chiếu câu hỏi word thành câu hỏi tương tác</button>
      </div>
      <div aria-live="polite" class="regular-choice-status" id="documentPresentationChoiceStatus"></div>
    </div>
  </div>
</div>
<div class="regular-choice-modal" hidden="" id="wordPresentationChoiceModal">
  <div class="regular-choice-backdrop" data-word-presentation-choice-close="1"></div>
  <div aria-labelledby="wordPresentationChoiceTitle" aria-modal="true" class="regular-choice-dialog" role="dialog">
    <div class="regular-choice-head">
      <div>
        <h3 id="wordPresentationChoiceTitle">Trình chiếu câu hỏi word thành câu hỏi tương tác</h3>
        <p>Tải file Word từ máy tính và xem mẫu trình bày ngay phía dưới.</p>
      </div>
      <button class="nav-btn btn-outline" id="wordPresentationChoiceCloseBtn" type="button">Đóng</button>
    </div>
    <div class="regular-choice-body">
      <div class="regular-choice-actions">
        <button class="nav-btn btn-primary" id="wordPresentationChoiceLocalBtn" type="button">Tải file word từ máy tính</button>
        <button class="nav-btn btn-outline" hidden="" id="wordPresentationSampleOpenBtn" type="button">Xem mẫu câu hỏi</button>
      </div>
      <div aria-live="polite" class="regular-choice-status" id="wordPresentationChoiceStatus"></div>
    </div>
  </div>
</div>
<div class="regular-sample-modal" hidden="" id="wordPresentationSampleModal">
  <div class="regular-sample-backdrop" data-word-presentation-sample-close="1"></div>
  <div aria-labelledby="wordPresentationSampleTitle" aria-modal="true" class="regular-sample-dialog" role="dialog">
    <div class="regular-sample-head">
      <h3 id="wordPresentationSampleTitle">Xem mẫu câu hỏi</h3>
      <button class="nav-btn btn-outline" id="wordPresentationSampleCloseBtn" type="button">Đóng</button>
    </div>
    <div class="regular-sample-body">
      <div class="regular-sample-title">Mẫu câu</div>
      <table class="regular-sample-table">
        <colgroup>
          <col style="width:24%">
          <col style="width:20%">
          <col style="width:30%">
          <col style="width:26%">
        </colgroup>
        <thead>
          <tr>
            <th>
              <span class="regular-sample-column-title">Nhiều lựa chọn</span>
              <span class="regular-sample-instruction"><span class="regular-sample-blue">Bôi đỏ</span> hoặc <span class="regular-sample-blue-underline">gạch chân</span><br>vào phương án đúng</span>
            </th>
            <th colspan="2">
              <span class="regular-sample-column-title">Đúng – Sai</span>
              <span class="regular-sample-instruction"><span class="regular-sample-blue">Bôi đỏ</span> hoặc <span class="regular-sample-blue-underline">gạch chân</span> vào ý đúng<br>hoặc kẻ bảng ghi chữ <b>Đ</b> vào ý đúng</span>
            </th>
            <th>
              <span class="regular-sample-column-title">Trả lời ngắn hoặc tự<br>luận</span>
              <span class="regular-sample-instruction" aria-hidden="true">&nbsp;</span>
            </th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td>
              <div class="regular-sample-question">Câu 1. Nội dung</div>
              <span class="regular-sample-answer">A. Phương án A</span>
              <span class="regular-sample-answer correct-line-red"><span class="regular-sample-letter-underline">B.</span> Phương án B</span>
              <span class="regular-sample-answer">C. Phương án C</span>
              <span class="regular-sample-answer">D. Phương án D</span>
            </td>
            <td>
              <div class="regular-sample-question">Câu 1. Nội dung</div>
              <span class="regular-sample-answer">a) ý thứ nhất</span>
              <span class="regular-sample-answer correct-line-red"><span class="regular-sample-letter-underline">b)</span> ý thứ hai</span>
              <span class="regular-sample-answer">c) ý thứ ba</span>
              <span class="regular-sample-answer correct-line-red"><span class="regular-sample-letter-underline">d)</span> ý thứ tư</span>
            </td>
            <td class="regular-sample-tf-table-cell">
              <div class="regular-sample-question">Câu 1. Nội dung</div>
              <table class="regular-sample-tf-answer-table" aria-label="Mẫu đáp án Đúng – Sai bằng bảng">
                <thead>
                  <tr><th>Nội dung</th><th>Đ hoặc S</th></tr>
                </thead>
                <tbody>
                  <tr><td>a) ý thứ nhất</td><td>Đ</td></tr>
                  <tr><td>b) ý thứ hai</td><td>S</td></tr>
                  <tr><td>c) ý thứ ba</td><td>Đ</td></tr>
                  <tr><td>d) ý thứ tư</td><td>S</td></tr>
                </tbody>
              </table>
            </td>
            <td>
              <div class="regular-sample-question">Câu 1. Nội dung</div>
              <span class="regular-sample-answer regular-sample-answer-note">Đáp án: Nội dung đáp án</span>
              <span class="regular-sample-or">Hoặc</span>
              <span class="regular-sample-answer regular-sample-answer-note">Trả lời: Nội dung trả lời</span>
            </td>
          </tr>
        </tbody>
      </table>
      <p class="regular-sample-footnote">Ghi chú: Nếu không cho biết <strong>Đáp án</strong> thì Mvip vẫn trình chiếu bình thường.</p>
    </div>
  </div>
</div>
<div class="regular-question-modal" hidden="" id="regularTestQuestionModal">
  <div aria-label="Soạn câu hỏi kiểm tra thường xuyên" aria-modal="true" class="regular-question-editor" role="dialog">
    <div class="regular-question-toolbar">
      <div class="regular-question-title" id="regularTestQuestionTitle">Soạn câu hỏi</div>
      <div class="regular-question-total" id="regularTestQuestionTotal">Tổng số câu đã chọn: 0</div>
      <div class="regular-question-actions">
        <button class="nav-btn btn-outline" id="regularTestQuestionResetBtn" type="button">Đặt lại</button>
        <button class="nav-btn btn-primary" id="regularTestQuestionSaveBtn" type="button">Sinh đề</button>
        <button class="nav-btn btn-outline" id="regularTestQuestionCloseBtn" type="button">Thoát</button>
      </div>
    </div>
    <div class="regular-question-table-wrap">
      <table class="regular-question-table" id="regularTestQuestionTable">
        <colgroup>
          <col class="rq-col-tt"><col class="rq-col-chapter"><col class="rq-col-unit">
          <col class="rq-col-count"><col class="rq-col-count"><col class="rq-col-count"><col class="rq-col-count">
          <col class="rq-col-count"><col class="rq-col-count"><col class="rq-col-count"><col class="rq-col-count">
        </colgroup>
        <thead>
          <tr>
            <th rowspan="4">TT</th>
            <th rowspan="4">Chủ đề/<br>Chương</th>
            <th rowspan="4">Nội dung/đơn vị<br>kiến thức</th>
            <th colspan="8">Mức độ đánh giá</th>
          </tr>
          <tr><th colspan="8">TNKQ</th></tr>
          <tr><th colspan="4">Nhiều lựa chọn</th><th colspan="4" class="rq-type-start">Đúng - Sai</th></tr>
          <tr><th>Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th><th class="rq-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th></tr>
        </thead>
        <tbody></tbody>
      </table>
    </div>
  </div>
</div>
<div class="class-manager-modal" hidden="" id="classManagerModal">
<div class="class-manager-backdrop" data-class-manager-close="1"></div>
<div aria-labelledby="classManagerTitle" aria-modal="true" class="class-manager-dialog" role="dialog">
<div class="class-manager-head">
<div>
<h3 id="classManagerTitle">Quản lí</h3>

</div>
<button class="nav-btn btn-outline" id="classManagerCloseBtn" type="button">Đóng</button>
</div>
<div class="class-manager-body">
<div aria-label="Menu nhỏ quản lí" class="class-manager-subnav">
<button class="class-manager-subbtn" id="classManagerTabRosterBtn" type="button">Danh sách lớp</button>
<button class="class-manager-subbtn" id="classManagerTabCv7991Btn" type="button">Soạn đề kiểm tra</button>
<button class="class-manager-subbtn" id="classManagerTabOutlineBtn" type="button">Soạn đề cương</button>
</div>
<div class="class-manager-subpanel" id="classManagerRosterPanel">
<div class="class-manager-roster-head">
<div>
<h4>Danh sách lớp hiện có</h4>

</div>
<button class="nav-btn btn-primary" id="addClassSubjectBtn" type="button">Thêm lớp</button>
</div>
<select hidden="" id="classManagerSelect"></select>
<input hidden="" id="newClassSubjectInput" type="hidden"/>
<div class="class-manager-list-rows" id="classManagerListRows"></div>
</div>
<div class="class-manager-subpanel" hidden="" id="classManagerCv7991Panel">
<div class="cv7991-wrap" id="cv7991Root">
<div class="cv7991-head">
<div>
<h4 id="cv7991PanelTitle">Soạn đề kiểm tra</h4>
<p id="cv7991PanelDesc" hidden=""></p>
</div>
</div>
<div class="cv7991-body">
<div class="cv7991-card cv7991-card-class">
<h4 class="cv7991-step-title" id="cv7991ClassStepTitle">Bước 1. Chọn lớp-môn</h4>
<div class="cv7991-class-grid" id="cv7991ClassChecklist"></div>
</div>
<div class="cv7991-card cv7991-cv-only cv7991-card-title">
<h4 class="cv7991-step-title">Bước 2. Đặt tên đề kiểm tra</h4>
<div class="cv7991-form-grid cv7991-title-picker-row">
<button class="nav-btn btn-outline" id="cv7991OpenExamTitleBtn" type="button">Đặt tên đề</button>
<div aria-live="polite" class="cv7991-title-selected-display" id="cv7991ExamTitleDisplay">Chưa chọn tên đề</div>
<input id="cv7991ExamTitleInput" type="hidden" value=""/>
</div>
</div>
<div class="cv7991-card cv7991-cv-only cv7991-card-bank">
<h4 class="cv7991-step-title">Bước 3. Nạp ngân hàng đề</h4>
<div aria-label="Chọn nguồn ngân hàng đề" class="cv7991-bank-source" role="radiogroup">
<div class="cv7991-bank-choice-card active" id="cv7991BankSourceWordCard">
<label class="cv7991-bank-choice-heading" for="cv7991BankSourceWordRadio">
<input checked="" id="cv7991BankSourceWordRadio" name="cv7991BankSource" type="radio" value="word"/>
<span>Tự có ngân hàng đề</span>
</label>
<div class="cv7991-bank-choice-actions">
<button class="nav-btn btn-outline" id="cv7991ImportWordBtn" type="button">Nhập từ word</button>
<button class="nav-btn btn-outline" id="cv7991DownloadTemplateBtn" type="button">Tải mẫu Word</button>
</div>
<div class="cv7991-bank-choice-status" id="cv7991WordBankStatus">Tải ngân hàng Word theo mẫu Câu n(NB/TH/VD/VDC):, đáp án đúng bôi đỏ hoặc gạch chân</div>
</div>
<div class="cv7991-bank-choice-card" id="cv7991BankSourceMvipCard">
<label class="cv7991-bank-choice-heading cv7991-bank-choice-button" for="cv7991BankSourceMvipRadio" id="cv7991LoadBankBtn">
<input id="cv7991BankSourceMvipRadio" name="cv7991BankSource" type="radio" value="mvip"/>
<span>Sử dụng ngân hàng đề của Mvip</span>
</label>
<label for="cv7991QuestionBankSelect" hidden="" id="cv7991PresetBankField">Chọn ngân hàng đề của Mvip
<select id="cv7991QuestionBankSelect">
<!-- Khối 1: bổ sung ngân hàng Toán 1; giữ GDĐP 1 như cũ. -->
<option data-bank-folder="Khoi_1/Toan_1" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_1/Toan_1/">Toán 1</option>
<option data-bank-folder="Khoi_1/GD_dia_phuong_1" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_1/GD_dia_phuong_1/">GDĐP 1</option>
<option data-bank-folder="Khoi_2/GD_dia_phuong_2" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_2/GD_dia_phuong_2/">GDĐP 2</option>
<option data-bank-folder="Khoi_3/GD_dia_phuong_3" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_3/GD_dia_phuong_3/">GDĐP 3</option>
<!-- Khối 4: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_4/Tieng_Viet_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Tieng_Viet_4/">Tiếng Việt 4</option>
<option data-bank-folder="Khoi_4/Toan_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Toan_4/">Toán 4</option>
<option data-bank-folder="Khoi_4/Dao_duc_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Dao_duc_4/">Đạo đức 4</option>
<option data-bank-folder="Khoi_4/Khoa_hoc_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Khoa_hoc_4/">Khoa học 4</option>
<option data-bank-folder="Khoi_4/Su_Dia_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Su_Dia_4/">Lịch sử và Địa lí 4</option>
<option data-bank-folder="Khoi_4/Tin_CN_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Tin_CN_4/">Tin học và Công nghệ 4</option>
<option data-bank-folder="Khoi_4/GDTC_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/GDTC_4/">Giáo dục thể chất 4</option>
<option data-bank-folder="Khoi_4/Am_nhac_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Am_nhac_4/">Âm nhạc 4</option>
<option data-bank-folder="Khoi_4/Mi_thuat_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Mi_thuat_4/">Mĩ thuật 4</option>
<option data-bank-folder="Khoi_4/HDTN_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/HDTN_4/">Hoạt động trải nghiệm 4</option>
<option data-bank-folder="Khoi_4/Anh_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Anh_4/">Tiếng Anh 4</option>
<option data-bank-folder="Khoi_4/Tieng_DTTS_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/Tieng_DTTS_4/">Tiếng dân tộc thiểu số 4</option>
<option data-bank-folder="Khoi_4/GD_dia_phuong_4" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_4/GD_dia_phuong_4/">GDĐP 4</option>
<!-- Khối 5: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_5/Tieng_Viet_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Tieng_Viet_5/">Tiếng Việt 5</option>
<option data-bank-folder="Khoi_5/Toan_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Toan_5/">Toán 5</option>
<option data-bank-folder="Khoi_5/Dao_duc_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Dao_duc_5/">Đạo đức 5</option>
<option data-bank-folder="Khoi_5/Khoa_hoc_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Khoa_hoc_5/">Khoa học 5</option>
<option data-bank-folder="Khoi_5/Su_Dia_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Su_Dia_5/">Lịch sử và Địa lí 5</option>
<option data-bank-folder="Khoi_5/Tin_CN_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Tin_CN_5/">Tin học và Công nghệ 5</option>
<option data-bank-folder="Khoi_5/GDTC_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/GDTC_5/">Giáo dục thể chất 5</option>
<option data-bank-folder="Khoi_5/Am_nhac_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Am_nhac_5/">Âm nhạc 5</option>
<option data-bank-folder="Khoi_5/Mi_thuat_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Mi_thuat_5/">Mĩ thuật 5</option>
<option data-bank-folder="Khoi_5/HDTN_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/HDTN_5/">Hoạt động trải nghiệm 5</option>
<option data-bank-folder="Khoi_5/Anh_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Anh_5/">Tiếng Anh 5</option>
<option data-bank-folder="Khoi_5/Tieng_DTTS_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/Tieng_DTTS_5/">Tiếng dân tộc thiểu số 5</option>
<option data-bank-folder="Khoi_5/GD_dia_phuong_5" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_5/GD_dia_phuong_5/">GDĐP 5</option>
<!-- Khối 6: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_6/Ngu_van_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Ngu_van_6/">Ngữ văn 6</option>
<option data-bank-folder="Khoi_6/Toan_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Toan_6/">Toán 6</option>
<option data-bank-folder="Khoi_6/Anh_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Anh_6/">Tiếng Anh 6</option>
<option data-bank-folder="Khoi_6/GDCD_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/GDCD_6/">GDCD 6</option>
<option data-bank-folder="Khoi_6/Su_Dia_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Su_Dia_6/">Lịch sử và Địa lí 6</option>
<option data-bank-folder="Khoi_6/KHTN_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/KHTN_6/">KHTN 6</option>
<option data-bank-folder="Khoi_6/CN_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/CN_6/">Công nghệ 6</option>
<option data-bank-folder="Khoi_6/Tin_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Tin_6/">Tin học 6</option>
<option data-bank-folder="Khoi_6/GDTC_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/GDTC_6/">Giáo dục thể chất 6</option>
<option data-bank-folder="Khoi_6/Am_nhac_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Am_nhac_6/">Âm nhạc 6</option>
<option data-bank-folder="Khoi_6/Mi_thuat_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Mi_thuat_6/">Mĩ thuật 6</option>
<option data-bank-folder="Khoi_6/HDTN_HN_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/HDTN_HN_6/">HĐTN-HN 6</option>
<option data-bank-folder="Khoi_6/GD_dia_phuong_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/GD_dia_phuong_6/">GDĐP 6</option>
<option data-bank-folder="Khoi_6/Ngoai_ngu_2_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Ngoai_ngu_2_6/">Ngoại ngữ 2 6</option>
<option data-bank-folder="Khoi_6/Tieng_DTTS_6" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_6/Tieng_DTTS_6/">Tiếng dân tộc thiểu số 6</option>
<!-- Khối 7: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_7/Ngu_van_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Ngu_van_7/">Ngữ văn 7</option>
<option data-bank-folder="Khoi_7/Toan_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Toan_7/">Toán 7</option>
<option data-bank-folder="Khoi_7/Anh_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Anh_7/">Tiếng Anh 7</option>
<option data-bank-folder="Khoi_7/GDCD_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/GDCD_7/">GDCD 7</option>
<option data-bank-folder="Khoi_7/Su_Dia_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Su_Dia_7/">Lịch sử và Địa lí 7</option>
<option data-bank-folder="Khoi_7/KHTN_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/KHTN_7/">KHTN 7</option>
<option data-bank-folder="Khoi_7/CN_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/CN_7/">Công nghệ 7</option>
<option data-bank-folder="Khoi_7/Tin_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Tin_7/">Tin học 7</option>
<option data-bank-folder="Khoi_7/GDTC_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/GDTC_7/">Giáo dục thể chất 7</option>
<option data-bank-folder="Khoi_7/Am_nhac_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Am_nhac_7/">Âm nhạc 7</option>
<option data-bank-folder="Khoi_7/Mi_thuat_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Mi_thuat_7/">Mĩ thuật 7</option>
<option data-bank-folder="Khoi_7/HDTN_HN_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/HDTN_HN_7/">HĐTN-HN 7</option>
<option data-bank-folder="Khoi_7/GD_dia_phuong_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/GD_dia_phuong_7/">GDĐP 7</option>
<option data-bank-folder="Khoi_7/Ngoai_ngu_2_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Ngoai_ngu_2_7/">Ngoại ngữ 2 7</option>
<option data-bank-folder="Khoi_7/Tieng_DTTS_7" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_7/Tieng_DTTS_7/">Tiếng dân tộc thiểu số 7</option>
<!-- Khối 8: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_8/Ngu_van_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Ngu_van_8/">Ngữ văn 8</option>
<option data-bank-folder="Khoi_8/Toan_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Toan_8/">Toán 8</option>
<option data-bank-folder="Khoi_8/Anh_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Anh_8/">Tiếng Anh 8</option>
<option data-bank-folder="Khoi_8/GDCD_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/GDCD_8/">GDCD 8</option>
<option data-bank-folder="Khoi_8/Su_Dia_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Su_Dia_8/">Lịch sử và Địa lí 8</option>
<option data-bank-folder="Khoi_8/KHTN_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/KHTN_8/">KHTN 8</option>
<option data-bank-folder="Khoi_8/CN_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/CN_8/">Công nghệ 8</option>
<option data-bank-folder="Khoi_8/Tin_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Tin_8/">Tin học 8</option>
<option data-bank-folder="Khoi_8/GDTC_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/GDTC_8/">Giáo dục thể chất 8</option>
<option data-bank-folder="Khoi_8/Am_nhac_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Am_nhac_8/">Âm nhạc 8</option>
<option data-bank-folder="Khoi_8/Mi_thuat_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Mi_thuat_8/">Mĩ thuật 8</option>
<option data-bank-folder="Khoi_8/HDTN_HN_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/HDTN_HN_8/">HĐTN-HN 8</option>
<option data-bank-folder="Khoi_8/GD_dia_phuong_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/GD_dia_phuong_8/">GDĐP 8</option>
<option data-bank-folder="Khoi_8/Ngoai_ngu_2_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Ngoai_ngu_2_8/">Ngoại ngữ 2 8</option>
<option data-bank-folder="Khoi_8/Tieng_DTTS_8" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_8/Tieng_DTTS_8/">Tiếng dân tộc thiểu số 8</option>
<!-- Khối 9: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_9/Ngu_van_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Ngu_van_9/">Ngữ văn 9</option>
<option data-bank-folder="Khoi_9/Toan_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Toan_9/">Toán 9</option>
<option data-bank-folder="Khoi_9/Anh_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Anh_9/">Tiếng Anh 9</option>
<option data-bank-folder="Khoi_9/GDCD_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/GDCD_9/">GDCD 9</option>
<option data-bank-folder="Khoi_9/Su_Dia_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Su_Dia_9/">Lịch sử và Địa lí 9</option>
<option data-bank-folder="Khoi_9/KHTN_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/KHTN_9/">KHTN 9</option>
<option data-bank-folder="Khoi_9/CN_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/CN_9/">Công nghệ 9</option>
<option data-bank-folder="Khoi_9/Tin_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Tin_9/">Tin học 9</option>
<option data-bank-folder="Khoi_9/GDTC_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/GDTC_9/">Giáo dục thể chất 9</option>
<option data-bank-folder="Khoi_9/Am_nhac_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Am_nhac_9/">Âm nhạc 9</option>
<option data-bank-folder="Khoi_9/Mi_thuat_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Mi_thuat_9/">Mĩ thuật 9</option>
<option data-bank-folder="Khoi_9/HDTN_HN_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/HDTN_HN_9/">HĐTN-HN 9</option>
<option data-bank-folder="Khoi_9/GD_dia_phuong_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/GD_dia_phuong_9/">GDĐP 9</option>
<option data-bank-folder="Khoi_9/Ngoai_ngu_2_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Ngoai_ngu_2_9/">Ngoại ngữ 2 9</option>
<option data-bank-folder="Khoi_9/Tieng_DTTS_9" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_9/Tieng_DTTS_9/">Tiếng dân tộc thiểu số 9</option>
<!-- Khối 10: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_10/Ngu_van_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Ngu_van_10/">Ngữ văn 10</option>
<option data-bank-folder="Khoi_10/Toan_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Toan_10/">Toán 10</option>
<option data-bank-folder="Khoi_10/Anh_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Anh_10/">Tiếng Anh 10</option>
<option data-bank-folder="Khoi_10/Lich_su_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Lich_su_10/">Lịch sử 10</option>
<option data-bank-folder="Khoi_10/Dia_li_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Dia_li_10/">Địa lí 10</option>
<option data-bank-folder="Khoi_10/GDKT_PL_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/GDKT_PL_10/">GDKT-PL 10</option>
<option data-bank-folder="Khoi_10/Vat_li_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Vat_li_10/">Vật lí 10</option>
<option data-bank-folder="Khoi_10/Hoa_10" data-legacy-url="https://mvip.vn/downloads/Ngan_hang_de_Hoa10_CV7991.docx" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Hoa_10/">Hóa học 10</option>
<option data-bank-folder="Khoi_10/Sinh_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Sinh_10/">Sinh học 10</option>
<option data-bank-folder="Khoi_10/CN_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/CN_10/">Công nghệ 10</option>
<option data-bank-folder="Khoi_10/Tin_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Tin_10/">Tin học 10</option>
<option data-bank-folder="Khoi_10/GDTC_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/GDTC_10/">Giáo dục thể chất 10</option>
<option data-bank-folder="Khoi_10/GDQP_AN_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/GDQP_AN_10/">Giáo dục quốc phòng và an ninh 10</option>
<option data-bank-folder="Khoi_10/Am_nhac_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Am_nhac_10/">Âm nhạc 10</option>
<option data-bank-folder="Khoi_10/Mi_thuat_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Mi_thuat_10/">Mĩ thuật 10</option>
<option data-bank-folder="Khoi_10/HDTN_HN_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/HDTN_HN_10/">HĐTN-HN 10</option>
<option data-bank-folder="Khoi_10/GD_dia_phuong_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/GD_dia_phuong_10/">GDĐP 10</option>
<option data-bank-folder="Khoi_10/Chuyen_de_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Chuyen_de_10/">Chuyên đề học tập 10</option>
<option data-bank-folder="Khoi_10/Ngoai_ngu_2_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Ngoai_ngu_2_10/">Ngoại ngữ 2 10</option>
<option data-bank-folder="Khoi_10/Tieng_DTTS_10" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_10/Tieng_DTTS_10/">Tiếng dân tộc thiểu số 10</option>
<!-- Khối 11: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_11/Ngu_van_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Ngu_van_11/">Ngữ văn 11</option>
<option data-bank-folder="Khoi_11/Toan_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Toan_11/">Toán 11</option>
<option data-bank-folder="Khoi_11/Anh_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Anh_11/">Tiếng Anh 11</option>
<option data-bank-folder="Khoi_11/Lich_su_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Lich_su_11/">Lịch sử 11</option>
<option data-bank-folder="Khoi_11/Dia_li_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Dia_li_11/">Địa lí 11</option>
<option data-bank-folder="Khoi_11/GDKT_PL_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/GDKT_PL_11/">GDKT-PL 11</option>
<option data-bank-folder="Khoi_11/Vat_li_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Vat_li_11/">Vật lí 11</option>
<option data-bank-folder="Khoi_11/Hoa_11" data-legacy-url="https://mvip.vn/downloads/Ngan_hang_de_Hoa11_CV7991.docx" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Hoa_11/">Hóa học 11</option>
<option data-bank-folder="Khoi_11/Sinh_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Sinh_11/">Sinh học 11</option>
<option data-bank-folder="Khoi_11/CN_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/CN_11/">Công nghệ 11</option>
<option data-bank-folder="Khoi_11/Tin_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Tin_11/">Tin học 11</option>
<option data-bank-folder="Khoi_11/GDTC_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/GDTC_11/">Giáo dục thể chất 11</option>
<option data-bank-folder="Khoi_11/GDQP_AN_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/GDQP_AN_11/">Giáo dục quốc phòng và an ninh 11</option>
<option data-bank-folder="Khoi_11/Am_nhac_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Am_nhac_11/">Âm nhạc 11</option>
<option data-bank-folder="Khoi_11/Mi_thuat_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Mi_thuat_11/">Mĩ thuật 11</option>
<option data-bank-folder="Khoi_11/HDTN_HN_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/HDTN_HN_11/">HĐTN-HN 11</option>
<option data-bank-folder="Khoi_11/GD_dia_phuong_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/GD_dia_phuong_11/">GDĐP 11</option>
<option data-bank-folder="Khoi_11/Chuyen_de_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Chuyen_de_11/">Chuyên đề học tập 11</option>
<option data-bank-folder="Khoi_11/Ngoai_ngu_2_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Ngoai_ngu_2_11/">Ngoại ngữ 2 11</option>
<option data-bank-folder="Khoi_11/Tieng_DTTS_11" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_11/Tieng_DTTS_11/">Tiếng dân tộc thiểu số 11</option>
<!-- Khối 12: các môn đều có đường dẫn thư mục ngân hàng để nút Tự luyện luôn hoạt động -->
<option data-bank-folder="Khoi_12/Ngu_van_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Ngu_van_12/">Ngữ văn 12</option>
<option data-bank-folder="Khoi_12/Toan_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Toan_12/">Toán 12</option>
<option data-bank-folder="Khoi_12/Anh_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Anh_12/">Tiếng Anh 12</option>
<option data-bank-folder="Khoi_12/Lich_su_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Lich_su_12/">Lịch sử 12</option>
<option data-bank-folder="Khoi_12/Dia_li_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Dia_li_12/">Địa lí 12</option>
<option data-bank-folder="Khoi_12/GDKT_PL_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/GDKT_PL_12/">GDKT-PL 12</option>
<option data-bank-folder="Khoi_12/Vat_li_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Vat_li_12/">Vật lí 12</option>
<option data-bank-folder="Khoi_12/Hoa_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Hoa_12/">Hóa học 12</option>
<option data-bank-folder="Khoi_12/Sinh_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Sinh_12/">Sinh học 12</option>
<option data-bank-folder="Khoi_12/CN_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/CN_12/">Công nghệ 12</option>
<option data-bank-folder="Khoi_12/Tin_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Tin_12/">Tin học 12</option>
<option data-bank-folder="Khoi_12/GDTC_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/GDTC_12/">Giáo dục thể chất 12</option>
<option data-bank-folder="Khoi_12/GDQP_AN_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/GDQP_AN_12/">Giáo dục quốc phòng và an ninh 12</option>
<option data-bank-folder="Khoi_12/Am_nhac_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Am_nhac_12/">Âm nhạc 12</option>
<option data-bank-folder="Khoi_12/Mi_thuat_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Mi_thuat_12/">Mĩ thuật 12</option>
<option data-bank-folder="Khoi_12/HDTN_HN_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/HDTN_HN_12/">HĐTN-HN 12</option>
<option data-bank-folder="Khoi_12/GD_dia_phuong_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/GD_dia_phuong_12/">GDĐP 12</option>
<option data-bank-folder="Khoi_12/Chuyen_de_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Chuyen_de_12/">Chuyên đề học tập 12</option>
<option data-bank-folder="Khoi_12/Ngoai_ngu_2_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Ngoai_ngu_2_12/">Ngoại ngữ 2 12</option>
<option data-bank-folder="Khoi_12/Tieng_DTTS_12" value="https://mvip.vn/downloads/Ngan_hang_de/Khoi_12/Tieng_DTTS_12/">Tiếng dân tộc thiểu số 12</option>
</select>
</label>
<div class="cv7991-bank-choice-status" hidden="" id="cv7991MvipBankStatus">Bấm Biên soạn ma trận để tải nhanh danh mục bài. Nội dung câu hỏi chỉ được nạp ở những bài đã chọn khi bấm Lưu hoặc Sinh đề.</div>
</div>
</div>
<div class="cv7991-bank-status" hidden="" id="cv7991BankStatus">Chưa tải danh mục ngân hàng câu hỏi.</div>
<input accept=".doc,.docx" id="cv7991WordFileInput" style="position:absolute;left:-9999px;top:auto;width:1px;height:1px;opacity:0;pointer-events:none;" tabindex="-1" type="file"/>
</div>
<div class="cv7991-card cv7991-card-config">
<div class="cv7991-config-head">
<h4 class="cv7991-step-title" id="cv7991ConfigStepTitle">Bước 4. Cấu hình đề</h4>
</div>

<div class="cv7991-score-config-panel cv7991-cv-only" id="cv7991ScorePanel">
  <div class="cv7991-score-config-title">Cài đặt điểm số</div>

  <label class="cv7991-score-config-item" for="cv7991ScoreMcInput">
    <span class="cv7991-score-config-label">Nhiều lựa chọn</span>
    <select id="cv7991ScoreMcInput" aria-label="Điểm mỗi câu nhiều lựa chọn">
      <option value="0.25" selected>0,25 điểm/câu</option>
      <option value="0.5">0,5 điểm/câu</option>
      <option value="1">1 điểm/câu</option>
    </select>
    <span class="cv7991-score-config-sub"><b id="cv7991ScoreMcCount">0</b> câu · <b id="cv7991ScoreMcTotal">0</b> điểm</span>
  </label>

  <label class="cv7991-score-config-item cv7991-score-config-item-tf" for="cv7991ScoreTfModeInput">
    <span class="cv7991-score-config-label">Đúng - Sai</span>
    <select id="cv7991ScoreTfModeInput" aria-label="Cách tính điểm câu Đúng - Sai">
      <option value="tiered" selected>Lựa chọn 1: 1 ý 0,1 · 2 ý 0,25 · 3 ý 0,5 · 4 ý 1 điểm</option>
      <option value="per_item_025">Lựa chọn 2: mỗi ý đúng 0,25 điểm</option>
    </select>
    <span class="cv7991-score-config-sub"><b id="cv7991ScoreTfCount">0</b> câu · tối đa <b id="cv7991ScoreTfTotal">0</b> điểm</span>
  </label>

  <label class="cv7991-score-config-item" for="cv7991ScoreShortInput">
    <span class="cv7991-score-config-label">Trả lời ngắn</span>
    <select id="cv7991ScoreShortInput" aria-label="Điểm mỗi câu trả lời ngắn">
      <option value="0.25">0,25 điểm/câu</option>
      <option value="0.5" selected>0,5 điểm/câu</option>
      <option value="1">1 điểm/câu</option>
    </select>
    <span class="cv7991-score-config-sub"><b id="cv7991ScoreShortCount">0</b> câu · <b id="cv7991ScoreShortTotal">0</b> điểm</span>
  </label>

  <div class="cv7991-score-config-item">
    <span class="cv7991-score-config-label">Tự luận</span>
    <span class="cv7991-score-config-fixed">1 điểm/câu</span>
    <span class="cv7991-score-config-sub"><b id="cv7991ScoreEssayCount">0</b> câu · <b id="cv7991ScoreEssayTotal">0</b> điểm</span>
  </div>

  <div class="cv7991-score-config-total">
    Tổng điểm theo ma trận: <b id="cv7991ScoreGrandTotal">0</b>
  </div>
</div>

<div class="cv7991-step-launchers cv7991-step-launchers-matrix-only">
<div class="cv7991-step-launch">
<button class="nav-btn btn-primary" id="cv7991OpenMatrixBtn" type="button">Biên soạn ma trận</button>
</div>
</div>
</div>

<div class="cv7991-card cv7991-outline-only cv7991-card-outline-generate">
<h4 class="cv7991-step-title" id="cv7991OutlineGenerateStepTitle">Bước 3. Sinh đề cương ôn tập</h4>
<div class="cv7991-tools">
<button class="nav-btn btn-primary" id="cv7991ReviewOutlineBtn" type="button">Sinh đề cương ôn tập</button>
</div>
</div>

<div class="cv7991-card cv7991-cv-only cv7991-card-generate">
<h4 class="cv7991-step-title">Bước 5. Sinh đề</h4>
<div class="cv7991-tools">
<button class="nav-btn btn-primary" id="cv7991GenerateExamBtn" type="button">Lựa chọn cách sinh đề</button>
</div>
</div>
<div class="cv7991-card cv7991-cv-only cv7991-card-delete">
<h4 class="cv7991-step-title">Bước 6. Xóa đề đã lưu (nếu không dùng đến)</h4>
<div class="cv7991-delete-grid">
<label for="cv7991DeleteExamSelect">Chọn đề đã lưu chưa dùng
<select id="cv7991DeleteExamSelect"></select>
</label>
<button class="nav-btn btn-outline" id="cv7991DeleteExamBtn" type="button">Xóa đề đang chọn</button>
</div>
</div>
<div class="cv7991-action-modal" hidden="" id="cv7991ExamTitleModal">
<div class="cv7991-action-backdrop" data-cv7991-title-close="1"></div>
<div aria-labelledby="cv7991ExamTitleModalTitle" aria-modal="true" class="cv7991-action-dialog cv7991-action-dialog-wide cv7991-action-dialog-full" role="dialog">
<div class="cv7991-action-head">
<div>
<h3 id="cv7991ExamTitleModalTitle">Đặt tên đề</h3>

</div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991ExamTitleCloseBtn" type="button">×</button>
</div>
<div class="cv7991-action-body">
<div class="cv7991-title-input-row">
<label for="cv7991ExamTitleModalInput">Nhập tên đề muốn dùng
<input id="cv7991ExamTitleModalInput" placeholder="Nhập tên đề kiểm tra" type="text"/>
</label>
<button class="nav-btn btn-primary" id="cv7991UseExamTitleBtn" type="button">Dùng tên này</button>
</div>
<div class="cv7991-title-table-scroll" id="cv7991ExamTitleTableWrap"></div>
</div>
</div>
</div>
<div class="cv7991-action-modal" hidden="" id="cv7991ReviewExportModal">
<div class="cv7991-action-backdrop" data-cv7991-review-export-close="1"></div>
<div aria-labelledby="cv7991ReviewExportModalTitle" aria-modal="true" class="cv7991-action-dialog" role="dialog">
<div class="cv7991-action-head">
<div>
<h3 id="cv7991ReviewExportModalTitle">Sinh đề cương ôn tập</h3>
<p>Bấm OK để tải 01 file ZIP chứa đủ 2 file Word về máy.</p>
</div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991ReviewExportCloseBtn" type="button">×</button>
</div>
<div class="cv7991-action-body">
<div id="cv7991ReviewExportMessage">Mvip sinh ra 2 file Word.</div>
<div class="cv7991-review-export-files" id="cv7991ReviewExportFiles"></div>
</div>
<div class="cv7991-action-actions">
<button class="nav-btn btn-primary" id="cv7991ReviewExportOkBtn" type="button">OK</button>
</div>
</div>
</div>
<div class="cv7991-action-modal" hidden="" id="cv7991GenerateExamModal">
<div class="cv7991-action-backdrop" data-cv7991-generate-close="1"></div>
<div aria-labelledby="cv7991GenerateExamModalTitle" aria-modal="true" class="cv7991-action-dialog cv7991-action-dialog-wide" role="dialog">
<div class="cv7991-action-head">
<div>
<h3 id="cv7991GenerateExamModalTitle">Lựa chọn cách sinh đề</h3>
<p>Chọn một cách sinh đề, sau đó bấm Tiếp theo để nhập thông tin trên đề và chọn form.</p>
</div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991GenerateExamCloseBtn" type="button">×</button>
</div>
<div class="cv7991-action-body">
<label class="cv7991-check cv7991-action-option">
<input checked="" id="cv7991GenerateModeSingleRadio" name="cv7991GenerateMode" type="radio" value="single"/>
<span><b>Lựa chọn 1.</b> Sinh 01 đề duy nhất (Không dùng cho chấm theo mã đề)</span>
</label>
<div class="cv7991-action-option">
<label class="cv7991-check">
<input id="cv7991CodeModePerStudentRadio" name="cv7991GenerateMode" type="radio" value="per_student"/>
<span><b>Lựa chọn 2.</b> Sinh mỗi học sinh 01 mã đề</span>
</label>
<div class="cv7991-nested-options" id="cv7991PerStudentOptionsRow">
<label class="cv7991-check cv7991-action-option">
<input id="cv7991SameQuizShuffleCheckbox" type="checkbox"/>
<span>Các câu trắc nghiệm giống nhau nhưng có đảo câu, đảo phương án cho mỗi mã đề</span>
</label>
<label class="cv7991-check cv7991-action-option">
<input id="cv7991FreezeEssayCheckbox" type="checkbox"/>
<span>Các câu tự luận giống nhau</span>
</label>
</div>
</div>
<div class="cv7991-action-option cv7991-code-count-option">
<label class="cv7991-check cv7991-code-count-label">
<input id="cv7991CodeModeCountRadio" name="cv7991GenerateMode" type="radio" value="fixed_count"/>
<span><b>Lựa chọn 3.</b> Chia cả lớp thành</span>
<input aria-label="Số mã đề" class="cv7991-code-count-inline-input" id="cv7991CodeCountInput" inputmode="numeric" min="1" step="1" type="number" value="4"/>
<span>mã đề</span>
</label>
<div class="cv7991-nested-options" id="cv7991CodeCountRow">
<label class="cv7991-check cv7991-action-option">
<input id="cv7991FixedSameQuizShuffleCheckbox" type="checkbox"/>
<span>Các câu trắc nghiệm giống nhau nhưng có đảo câu, đảo phương án cho mỗi mã đề</span>
</label>
<label class="cv7991-check cv7991-action-option">
<input id="cv7991FixedFreezeEssayCheckbox" type="checkbox"/>
<span>Các câu tự luận giống nhau</span>
</label>
</div>
</div>
</div>
<div class="cv7991-action-actions">
<button class="nav-btn btn-primary" id="cv7991GenerateExamExportBtn" type="button">Tiếp theo</button>
</div>
</div>
</div>
<div class="cv7991-action-modal" hidden="" id="cv7991SingleExamOptionsModal">
<div class="cv7991-action-backdrop" data-cv7991-single-close="1"></div>
<div aria-labelledby="cv7991SingleExamOptionsModalTitle" aria-modal="true" class="cv7991-action-dialog cv7991-action-dialog-wide" role="dialog">
<div class="cv7991-action-head">
<div>
<h3 id="cv7991SingleExamOptionsModalTitle">Sinh 01 đề duy nhất</h3>
<p>Đề mặc định sắp xếp theo mức độ nhận thức. Bấm Xuất đề Word để tự sinh đề và tải file Word.</p>
</div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991SingleExamOptionsCloseBtn" type="button">×</button>
</div>
<div class="cv7991-action-body">
</div>
<div class="cv7991-action-actions">
<button class="nav-btn btn-primary" id="cv7991SingleExamExportBtn" type="button">Xuất đề Word</button>
</div>
</div>
</div>

<style id="cv7991-word-export-wait-style">
  .cv7991-word-export-wait[hidden]{display:none!important}
  .cv7991-word-export-wait{
    position:fixed;
    inset:0;
    z-index:12050;
    display:flex;
    align-items:center;
    justify-content:center;
    background:rgba(15,23,42,.28);
    backdrop-filter:blur(1px);
  }
  .cv7991-word-export-wait-box{
    min-width:250px;
    padding:24px 32px;
    border:1px solid #bfdbfe;
    border-radius:18px;
    background:#fff;
    box-shadow:0 20px 55px rgba(15,23,42,.28);
    display:flex;
    align-items:center;
    justify-content:center;
    gap:3px;
    color:#0f172a;
    font-family:"Times New Roman",serif;
    font-size:26px;
    font-weight:700;
    line-height:1.25;
  }
  .cv7991-word-export-wait-dots{
    display:inline-flex;
    align-items:flex-end;
    min-width:34px;
    margin-left:2px;
  }
  .cv7991-word-export-wait-dots span{
    display:inline-block;
    opacity:.18;
    animation:cv7991WordExportDot 1.05s infinite ease-in-out;
  }
  .cv7991-word-export-wait-dots span:nth-child(2){animation-delay:.18s}
  .cv7991-word-export-wait-dots span:nth-child(3){animation-delay:.36s}
  @keyframes cv7991WordExportDot{
    0%,60%,100%{opacity:.18;transform:translateY(0)}
    30%{opacity:1;transform:translateY(-3px)}
  }
</style>

<div class="cv7991-action-modal" hidden="" id="cv7991WordTemplateModal">
<div class="cv7991-action-backdrop" data-cv7991-word-template-close="1"></div>
<div aria-labelledby="cv7991WordTemplateModalTitle" aria-modal="true" class="cv7991-action-dialog cv7991-action-dialog-wide" role="dialog">
<div class="cv7991-action-head">
<div>
<h3 id="cv7991WordTemplateModalTitle">Nhập thông tin trên đề và chọn form</h3>
<p>Thông tin Tên đề và Môn được tự động lấy từ các bước trước. Chọn form và bổ sung các thông tin còn lại trước khi xuất đề.</p>
</div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991WordTemplateCloseBtn" type="button">×</button>
</div>
<div class="cv7991-action-body">
<div class="cv7991-word-template-live-layout">
  <div class="cv7991-word-template-live-controls">

<div class="cv7991-word-template-group-box cv7991-word-template-info-box">
<div class="cv7991-word-template-group-label">1. Thông tin trên đề</div>
<div id="cv7991WordTemplateForm1Options">
<div class="cv7991-word-template-grid cv7991-word-template-layout-2col">
<div class="cv7991-word-template-column cv7991-word-template-column-left">
<label>Tên đơn vị cấp trên / Sở
<input id="cv7991WordTemplateDistrictInput" placeholder="TÊN XÃ (SỞ)" type="text"/>
</label>
<label>Tên trường
<input id="cv7991WordTemplateSchoolInput" placeholder="TÊN TRƯỜNG" type="text"/>
</label>
</div>
<div class="cv7991-word-template-column cv7991-word-template-column-right">
<label>Năm học
<input id="cv7991WordTemplateSchoolYearInput" placeholder="NĂM HỌC" type="text"/>
</label>
<label>Thời gian làm bài
<input id="cv7991WordTemplateDurationInput" placeholder="Thời gian làm bài" type="text"/>
</label>
</div>
</div>
<p class="cv7991-word-template-note">Tên đề được tự động lấy từ Bước 2. Môn và khối được tự động lấy từ Lớp - Môn ở Bước 1. Nếu bạn đang dùng Lựa chọn 2 hoặc Lựa chọn 3 thì Họ và tên học sinh và tên lớp cũng được tự điền tự động.</p>

</div>
</div>

<div class="cv7991-word-template-group-box cv7991-word-template-direct-box">
<div class="cv7991-word-template-group-label">2. Chọn form làm trực tiếp trên đề</div>
<div class="cv7991-action-option cv7991-word-template-choice-row">
<label class="cv7991-check">
<input checked="" id="cv7991WordTemplateForm1Radio" name="cv7991WordTemplateMode" type="radio" value="form1"/>
<span><b>Form 1.</b> Đầy đủ, cắt phách</span>
</label>
<button class="cv7991-word-template-preview-btn" id="cv7991WordTemplateForm1PreviewBtn" type="button">Xem mẫu</button>
</div>
<div class="cv7991-action-option cv7991-word-template-choice-row">
<label class="cv7991-check">
<input id="cv7991WordTemplateForm2Radio" name="cv7991WordTemplateMode" type="radio" value="form2"/>
<span><b>Form 2.</b> Đơn giản</span>
</label>
<button class="cv7991-word-template-preview-btn" id="cv7991WordTemplateForm2PreviewBtn" type="button">Xem mẫu</button>
</div>
<div class="cv7991-action-option cv7991-word-template-choice-row">
<label class="cv7991-check">
<input id="cv7991WordTemplateForm3Radio" name="cv7991WordTemplateMode" type="radio" value="form3"/>
<span><b>Form 3.</b> Gọn, không cắt phách.</span>
</label>
<button class="cv7991-word-template-preview-btn" id="cv7991WordTemplateForm3PreviewBtn" type="button">Xem mẫu</button>
</div>
<div class="cv7991-word-template-essay-lines" id="cv7991WordTemplateEssayLinesWrap">
  <label for="cv7991WordTemplateEssayLineCountInput">Số dòng viết tự luận</label>
  <input id="cv7991WordTemplateEssayLineCountInput" type="number" min="1" max="100" step="1" value="3"/>
  <span>dòng</span>
</div>
</div>

<div class="cv7991-word-template-group-box cv7991-word-template-separate-box">
<div class="cv7991-word-template-group-label">3. Chọn form không làm trực tiếp trên đề</div>
<div class="cv7991-action-option cv7991-word-template-choice-row">
<label class="cv7991-check">
<input id="cv7991WordTemplateForm4Radio" name="cv7991WordTemplateMode" type="radio" value="form4"/>
<span><b>Form 4.</b> Đơn giản</span>
</label>
<button class="cv7991-word-template-preview-btn" id="cv7991WordTemplateForm4PreviewBtn" type="button">Xem mẫu</button>
</div>
<div class="cv7991-action-option cv7991-word-template-choice-row">
<label class="cv7991-check">
<input id="cv7991WordTemplateForm5Radio" name="cv7991WordTemplateMode" type="radio" value="form5"/>
<span><b>Form 5.</b> Gọn</span>
</label>
<button class="cv7991-word-template-preview-btn" id="cv7991WordTemplateForm5PreviewBtn" type="button">Xem mẫu</button>
</div>
</div>

<div class="cv7991-word-template-even-pages-option">
  <label class="cv7991-check">
    <input id="cv7991WordTemplateEvenPagesCheckbox" type="checkbox"/>
    <span><b>Đệm thêm một trang trắng nếu số trang của mã đề là lẻ</b></span>
  </label>
  <div class="cv7991-word-template-even-pages-note">
    Trang trắng được chèn ngay sau mã đề và không có footer.
  </div>
</div>

<div class="cv7991-word-template-left-export">
  <button class="nav-btn btn-primary" id="cv7991WordTemplateOkBtn" type="button">Xuất đề</button>
</div>

  </div>
  <div class="cv7991-word-template-live-preview">
    <div class="cv7991-word-template-live-preview-head">
      <span>Xem trước đề</span>
      <span class="cv7991-word-template-live-preview-label" id="cv7991WordTemplateLivePreviewLabel">Form 1</span>
    </div>
    <div class="cv7991-word-template-live-preview-scroll">
      <div class="cv7991-word-template-live-page" id="cv7991WordTemplateLivePreview"></div>
    </div>
  </div>
</div>
</div>

</div>
</div>
<div class="cv7991-word-export-wait" hidden id="cv7991WordExportWait" aria-live="polite" aria-busy="true">
  <div class="cv7991-word-export-wait-box" role="status">
    <span>Đang xuất đề</span>
    <span class="cv7991-word-export-wait-dots" aria-hidden="true"><span>.</span><span>.</span><span>.</span></span>
  </div>
</div>
<div class="cv7991-action-modal" hidden="" id="cv7991WordTemplatePreviewModal">
<div class="cv7991-action-backdrop" data-cv7991-word-template-preview-close="1"></div>
<div aria-labelledby="cv7991WordTemplatePreviewTitle" aria-modal="true" class="cv7991-action-dialog cv7991-word-template-preview-dialog" role="dialog">
<div class="cv7991-action-head">
<div><h3 id="cv7991WordTemplatePreviewTitle">Mẫu Form 1</h3></div>
<button aria-label="Đóng" class="cv7991-action-close" id="cv7991WordTemplatePreviewCloseBtn" type="button">×</button>
</div>
<div class="cv7991-word-template-preview-body">
<img alt="Mẫu form đề Word" id="cv7991WordTemplatePreviewImage" src="data:image/png;base64,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<button class="nav-btn btn-outline" id="cv7991ResetMatrixBtn" type="button">Đặt lại</button>
<button class="nav-btn btn-primary" data-cv7991-editor-close="matrix" id="cv7991MatrixSaveBtn" type="button">Lưu</button>
<button class="nav-btn btn-outline cv7991-matrix-exit-btn" id="cv7991MatrixExitBtn" type="button">Thoát</button>
</div>
</div>
<div class="cv7991-editor-body">
<div class="cv7991-table-scroll">
<table class="cv7991-table" id="cv7991MatrixTable">
<colgroup>
<col class="cv7991-matrix-col-tt">
<col class="cv7991-matrix-col-chapter">
<col class="cv7991-matrix-col-unit">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
<col class="cv7991-matrix-col-equal">
</colgroup>
<thead>
<tr>
<th rowspan="2">TT</th>
<th rowspan="2">Chủ đề/Chương</th>
<th rowspan="2">Nội dung/đơn vị kiến thức</th>
<th colspan="4">Nhiều lựa chọn</th>
<th colspan="4" class="cv7991-type-start">Đúng - Sai</th>
<th colspan="4" class="cv7991-type-start">Trả lời ngắn</th>
<th colspan="4" class="cv7991-type-start">Tự luận</th>
<th colspan="4" class="cv7991-type-start">Tổng</th>
<th rowspan="2" class="cv7991-type-start">Tỉ lệ % điểm</th>
</tr>
<tr>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
</tr>
</thead>
<tbody></tbody>
<tfoot>
<tr>
<th colspan="3" class="cv7991-footer-label">Tổng số câu</th>
<th id="cv7991TotalMcB" class="cv7991-type-start">0</th>
<th id="cv7991TotalMcH">0</th>
<th id="cv7991TotalMcV">0</th>
<th id="cv7991TotalMcVdc">0</th>
<th id="cv7991TotalTfB" class="cv7991-type-start">0</th>
<th id="cv7991TotalTfH">0</th>
<th id="cv7991TotalTfV">0</th>
<th id="cv7991TotalTfVdc">0</th>
<th id="cv7991TotalShortB" class="cv7991-type-start">0</th>
<th id="cv7991TotalShortH">0</th>
<th id="cv7991TotalShortV">0</th>
<th id="cv7991TotalShortVdc">0</th>
<th id="cv7991TotalEssayB" class="cv7991-type-start">0</th>
<th id="cv7991TotalEssayH">0</th>
<th id="cv7991TotalEssayV">0</th>
<th id="cv7991TotalEssayVdc">0</th>
<th id="cv7991TotalB" class="cv7991-type-start">0</th>
<th id="cv7991TotalH">0</th>
<th id="cv7991TotalV">0</th>
<th id="cv7991TotalVdc">0</th>
<th id="cv7991GrandPoint" class="cv7991-type-start">0</th>
</tr>
<tr>
<th colspan="3" class="cv7991-footer-label">Tổng số điểm</th>
<th id="cv7991PointMc" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PointTf" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PointShort" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PointEssay" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PointB" class="cv7991-type-start">0</th>
<th id="cv7991PointH">0</th>
<th id="cv7991PointV">0</th>
<th id="cv7991PointVdc">0</th>
<th id="cv7991PointGrand" class="cv7991-type-start">0</th>
</tr>
<tr>
<th colspan="3" class="cv7991-footer-label">Tỷ lệ %</th>
<th id="cv7991PercentMc" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PercentTf" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PercentShort" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PercentEssay" colspan="4" class="cv7991-type-start">0</th>
<th id="cv7991PercentB" class="cv7991-type-start">0</th>
<th id="cv7991PercentH">0</th>
<th id="cv7991PercentV">0</th>
<th id="cv7991PercentVdc">0</th>
<th id="cv7991PercentGrand" class="cv7991-type-start">0%</th>
</tr>
</tfoot>
</table>
</div>
</div>
</div>
<div class="cv7991-editor-modal" hidden="" id="cv7991SpecModal">
<div class="cv7991-editor-head">
<div>
<h3>4.2. THỐNG KÊ CÂU HỎI</h3>
<p>Theo dõi số câu hỏi ở từng mức độ đánh giá.</p>
</div>
<div class="cv7991-editor-actions">
<button class="nav-btn btn-outline" id="cv7991SpecFilterMatrixBtn" type="button" aria-pressed="false">Lọc trùng với ma trận</button>
<button class="nav-btn btn-primary" data-cv7991-editor-close="spec" type="button">Đóng</button>
</div>
</div>
<div class="cv7991-editor-body">
<div class="cv7991-editor-note">Bảng thống kê tự đồng bộ theo số câu đã nhập.</div>
<div class="cv7991-table-scroll">
<table class="cv7991-table cv7991-spec-table" id="cv7991SpecTable">
<thead>
<tr>
<th rowspan="3">TT</th>
<th rowspan="3">Chủ đề/Chương</th>
<th rowspan="3">Nội dung/đơn vị kiến thức</th>
<th rowspan="3">Yêu cầu cần đạt</th>
<th colspan="16">Số câu hỏi ở các mức độ đánh giá</th>
</tr>
<tr>
<th colspan="4">Nhiều lựa chọn</th>
<th colspan="4" class="cv7991-type-start">Đúng - Sai</th>
<th colspan="4" class="cv7991-type-start">Trả lời ngắn</th>
<th colspan="4" class="cv7991-type-start">Tự luận</th>
</tr>
<tr>
<th>Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
<th class="cv7991-type-start">Biết</th><th>Hiểu</th><th>VD</th><th>VDC</th>
</tr>
</thead>
<tbody></tbody>
</table>
</div>
</div>
</div>
</div>
</div>
<div aria-live="polite" class="class-manager-status" id="classManagerStatus"></div>
</div>
</div>
</div>
</div>
<div class="add-class-modal" hidden="" id="addClassDialog">
<div class="add-class-backdrop" data-add-class-close="1"></div>
<div aria-labelledby="addClassDialogTitle" aria-modal="true" class="add-class-dialog" role="dialog">
<div class="add-class-head">
<div>
<h3 id="addClassDialogTitle">Thêm lớp</h3>
</div>
<div class="add-class-head-actions">
<button class="nav-btn btn-primary" id="addClassSaveBtn" type="button">Lưu</button>
<button class="nav-btn btn-outline" id="addClassCancelTopBtn" type="button">Đóng</button>
</div>
</div>
<div class="add-class-body">
<table class="add-class-table">
<tbody>
<tr>
<th><label for="addClassGradeSelect">Chọn lớp</label></th>
<td><select id="addClassGradeSelect"></select></td>
</tr>
<tr>
<th><label for="addClassNameInput">Nhập tên lớp</label><div class="add-class-note">Ví dụ: A, B, C, ...</div></th>
<td><input autocomplete="off" id="addClassNameInput" placeholder="Ví dụ: A" type="text"/></td>
</tr>
<tr>
<th><label for="addClassSubjectSelect">Chọn môn</label></th>
<td>
<select id="addClassSubjectSelect" aria-controls="addClassCustomSubjectWrap"></select>
<div class="add-class-custom-subject" hidden="" id="addClassCustomSubjectWrap">
<label for="addClassCustomSubjectInput">Tên môn</label>
<input autocomplete="off" disabled="" id="addClassCustomSubjectInput" placeholder="Nhập tên môn học" type="text"/>
</div>
</td>
</tr>
<tr>
<th><label for="addClassRosterInput">Nhập danh sách học sinh</label></th>
<td>
<div class="add-class-roster-layout">
<div class="add-class-roster-pane add-class-roster-input-pane">
<div class="add-class-roster-pane-title"><span>Dán/nhập danh sách</span></div>
<textarea id="addClassRosterInput" placeholder="Dán hoặc nhập danh sách học sinh vào đây, mỗi học sinh 01 dòng" spellcheck="false"></textarea>
</div>
<div class="add-class-roster-pane add-class-roster-list-pane">
<div class="add-class-roster-pane-title"><span>Danh sách lớp</span><span class="add-class-roster-summary" id="addClassRosterSummary">0 học sinh</span></div>
<div aria-label="Danh sách học sinh và trạng thái bỏ học" class="add-class-roster-grid" role="table">
<div class="add-class-roster-grid-head" role="row"><div role="columnheader">Mã thẻ</div><div role="columnheader">Họ và tên</div><div role="columnheader">Bỏ học</div></div>
<div class="add-class-roster-grid-body" id="addClassRosterTableBody" role="rowgroup"><div class="add-class-roster-grid-empty">Dán danh sách học sinh để hiển thị tại đây.</div></div>
</div>
<div class="add-class-roster-message" id="addClassRosterTableMessage">Tích vào cột Bỏ học để mã thẻ đó không cập nhật kết quả quét mới.</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
<div aria-live="polite" class="add-class-status" id="addClassStatus"></div>
</div>
</div>
</div>
<div class="action-confirm-modal" hidden="" id="confirmActionModal">
<div class="action-confirm-backdrop" data-confirm-close="1"></div>
<div aria-labelledby="confirmActionTitle" aria-modal="true" class="action-confirm-dialog" role="dialog">
<div class="action-confirm-head" id="confirmActionTitle">Xác nhận xóa</div>
<div class="action-confirm-body" id="confirmActionMessage">Bạn có chắc chắn thực hiện thao tác này không?</div>
<div class="action-confirm-actions">
<button class="nav-btn btn-outline" id="confirmActionCancelBtn" type="button">Không</button>
<button class="nav-btn btn-primary" id="confirmActionOkBtn" type="button">Ok</button>
</div>
</div>
</div>
<div class="alert-modal" hidden="" id="alertModal">
<div class="alert-backdrop" data-alert-close="1"></div>
<div aria-labelledby="alertModalTitle" aria-modal="true" class="alert-dialog" role="dialog">
<div class="alert-head" id="alertModalTitle">Thông báo</div>
<div class="alert-body" id="alertModalMessage"></div>
<div class="alert-actions">
<button class="nav-btn btn-primary" id="alertModalOkBtn" type="button">Ok</button>
</div>
</div>
</div>
<div class="result-modal" hidden="" id="resultModal">
<div class="result-modal-backdrop" data-close="0"></div>
<div aria-labelledby="resultDialogTitle" aria-modal="true" class="result-dialog" role="dialog">
<div class="result-dialog-title" id="resultDialogTitle">Kết quả câu hỏi</div>
<div class="result-dialog-row">
<span>Đáp án đúng:</span>
<span class="result-correct-badge" id="resultCorrectBadge">A</span>
</div>
<div class="result-rate-line" id="resultRateText">Tỷ lệ đúng: 0/0 = 0%</div>
<div class="result-dialog-actions">
<button aria-label="Xem hướng dẫn giải của câu hiện tại" class="nav-btn result-guide-btn" hidden="" id="singleExamGuideBtn" title="Xem hướng dẫn" type="button">Xem HD</button>
<button class="nav-btn btn-primary" id="resultSaveBtn" type="button">Lưu</button>
<button class="nav-btn btn-outline" hidden="" id="resultRepickBtn" style="display:none!important" type="button">Chọn lại</button>
<button class="nav-btn btn-outline" id="resultCancelBtn" type="button">Hủy</button>
</div>
</div>
</div>
<div aria-hidden="true" class="limited-upgrade-modal" hidden="" id="limitedUpgradeModal">
<div class="limited-upgrade-backdrop" data-limited-upgrade-close="1"></div>
<div aria-labelledby="limitedUpgradeTitle" aria-modal="true" class="limited-upgrade-dialog" role="dialog">
<div class="limited-upgrade-head">
<h3 id="limitedUpgradeTitle">Thông báo</h3>
<button aria-label="Đóng" class="limited-upgrade-close" data-limited-upgrade-close="1" type="button">×</button>
</div>
<div class="limited-upgrade-row">
<p id="limitedUpgradeMessage"></p>
<button class="limited-upgrade-action" id="limitedUpgradeActionBtn" type="button">Nâng cấp mvip</button>
</div>
</div>
</div>
<div aria-hidden="true" class="result-class-required-modal" hidden="" id="resultClassRequiredModal">
<div class="result-class-required-backdrop" data-result-class-required-close="1"></div>
<div aria-labelledby="resultClassRequiredTitle" aria-modal="true" class="result-class-required-dialog" role="dialog">
<div class="result-class-required-head">
<h3 id="resultClassRequiredTitle">Thông báo</h3>
<button aria-label="Đóng" class="result-class-required-close" data-result-class-required-close="1" id="resultClassRequiredCloseBtn" type="button">×</button>
</div>
<p class="result-class-required-message">Bạn cần chọn lớp - môn để xem kết quả</p>
<div class="result-class-required-select-wrap">
<select aria-label="Chọn lớp - môn để xem kết quả" id="resultClassRequiredSelect">
<option value="">Chọn lớp - môn</option>
</select>
</div>
</div>
</div>
<div class="report-modal" hidden="" id="reportModal">
<div class="report-modal-backdrop" data-report-close="1"></div>
<div aria-labelledby="reportPreviewTitle" aria-modal="true" class="report-dialog" role="dialog">
<div class="report-head">
<div class="report-preview-head report-head-summary">
<div class="report-preview-title" id="reportPreviewTitle">KẾT QUẢ THƯỜNG XUYÊN</div>
<div class="report-preview-meta" id="reportPreviewMeta">Chưa có dữ liệu để hiển thị.</div>
</div>
<div class="report-filter-panel">
<div class="report-filter-box report-filter-box-normal active" id="reportNormalFilterBox">
<label class="report-radio report-box-title"><input checked="" id="reportDatasetNormal" name="reportDataset" type="radio" value="normal"> Kết quả thường xuyên</input></label>
<div class="report-normal-controls">
<div class="report-mode-group">
<label class="report-radio"><input checked="" id="reportModeQuestion" name="reportMode" type="radio" value="by_question"> Theo câu</input></label>
<label class="report-radio"><input id="reportModeTime" name="reportMode" type="radio" value="by_time"> Theo thời gian</input></label>
</div>
<div class="report-filter-grid">
<div class="report-field" id="reportQuestionFromWrap">
<label for="reportQFrom">Từ câu</label>
<input id="reportQFrom" min="1" step="1" type="number" value="1"/>
</div>
<div class="report-field" id="reportQuestionToWrap">
<label for="reportQTo">Đến câu</label>
<input id="reportQTo" min="1" placeholder="Để trống = đến câu cuối" step="1" type="number"/>
</div>
<div class="report-field" id="reportDateFromWrap" style="display:none;">
<label for="reportDateFrom">Từ ngày</label>
<input id="reportDateFrom" type="date"/>
</div>
<div class="report-field" id="reportDateToWrap" style="display:none;">
<label for="reportDateTo">Đến ngày</label>
<input id="reportDateTo" type="date"/>
</div>
</div>
</div>
</div>
<div class="report-filter-box report-filter-box-exam" id="reportExamFilterBox">
<label class="report-radio report-box-title"><input id="reportDatasetExam" name="reportDataset" type="radio" value="exam"/> Kết quả theo mã đề</label>
<div class="report-exam-controls">
<div class="report-field" id="reportExamNoWrap">
<label for="reportExamNo">Đề số</label>
<select id="reportExamNo">
<option value="">Tất cả</option>
</select>
</div>
</div>
</div>
</div>
<div class="report-head-actions">
<button class="nav-btn btn-primary" id="reportGenerateBtn" type="button">Xem</button>
<button class="nav-btn btn-outline" id="reportExportBtn" type="button">Xuất Excel</button>
<button class="nav-btn btn-outline" id="reportCloseBtn" type="button">Đóng</button>
</div>
</div>
<div class="report-preview-shell">
<div class="report-preview-wrap" id="reportPreviewWrap">
<div class="report-placeholder">Đăng nhập, chọn đúng Lớp-Môn, rồi bấm <b>Kết quả</b> để mở bảng thống kê.</div>
</div>
</div>
</div>
</div>

<div class="subscription-modal" hidden="" id="subscriptionModal">
  <div class="subscription-backdrop" data-subscription-close="1"></div>
  <div aria-labelledby="subscriptionModalTitle" aria-modal="true" class="subscription-dialog" role="dialog">
    <div class="subscription-head">
      <div>
        <h3 id="subscriptionModalTitle">Nâng cấp MVIP Full bằng VietQR</h3>
        <p>Chọn gói, quét mã QR và hệ thống sẽ tự cộng thời hạn sau khi SePay xác nhận tiền vào.</p>
      </div>
      <button aria-label="Thoát" class="subscription-close" id="subscriptionCloseBtn" title="Thoát" type="button">Thoát</button>
    </div>
    <div class="subscription-body">
      <section class="subscription-card">
        <h4 class="subscription-package-title">Chọn gói MVIP Full</h4>
        <div class="subscription-package-grid" id="subscriptionPackageGrid"></div>
        <div class="subscription-hint">
          Bấm trực tiếp vào một gói để hệ thống tạo mã VietQR mới. Mỗi mã QR có số tiền và nội dung chuyển khoản riêng.
          Không sửa số tiền hoặc nội dung khi thanh toán. Trang tự kiểm tra trạng thái khoảng 3 giây/lần.
        </div>
      </section>
      <section class="subscription-card">
        <div class="subscription-qr-wrap" id="subscriptionQrWrap">
          <div class="subscription-placeholder" id="subscriptionPlaceholder">Chọn một gói ở bên trái để tạo mã QR thanh toán.</div>
          <img alt="Mã QR thanh toán MVIP qua SePay" hidden="" id="subscriptionQrImage"/>
        </div>
        <div class="subscription-details" hidden="" id="subscriptionDetails">
          <div class="subscription-detail-row"><span>Mã đơn</span><strong id="subscriptionOrderCode">-</strong></div>
          <div class="subscription-detail-row"><span>Số tiền</span><strong id="subscriptionOrderAmount">-</strong></div>
          <div class="subscription-detail-row"><span>Nội dung CK</span><strong><span id="subscriptionPaymentContent">-</span><button class="subscription-copy-btn" id="subscriptionCopyContentBtn" type="button">Sao chép</button></strong></div>
          <div class="subscription-detail-row"><span>Ngân hàng</span><strong id="subscriptionBankText">-</strong></div>
          <div class="subscription-detail-row"><span>Tài khoản</span><strong id="subscriptionAccountText">-</strong></div>
          <div class="subscription-detail-row"><span>Chủ tài khoản</span><strong id="subscriptionHolderText">-</strong></div>
          <div class="subscription-detail-row"><span>Thời gian còn</span><strong id="subscriptionTimeLeft">-</strong></div>
        </div>
        <div class="subscription-status" id="subscriptionStatus">Chưa tạo đơn thanh toán.</div>
      </section>
    </div>
  </div>
</div>

<script>
    const API_BASE = 'https://api.mvip.vn';
    const STORAGE_KEY = 'mvip_web_portal_auth_v1';
    const STORAGE_KEY_ACCOUNTS = 'mvip_web_portal_accounts_v1';

    const state = {
      token: '',
      username: '',
      password: '',
      classData: {},
      scanHistory: {},
      currentMon: '',
      currentStudents: {},
      currentDroppedStudents: {},
      currentShortNames: {},
      currentLiveAnswers: {},
      revealAnswers: false,
      selectedCorrect: '',
      columnCount: 3,
      examColumnCount: 5,
      fontSize: 22,
      selectedHistoryIndex: -1,
      ws: null,
      wsConnected: false,
      wsRetryTimer: null,
      wsRetryCount: 0,
      isLoading: false,
      pendingResult: null,
      regularTestRepickPending: null,
      currentReportPayload: null,
      managerMon: '',
      managerExamMons: [],
      managerExamEditNo: 0,
      classManagerTab: 'roster',
      addClassEditingKey: '',
      addClassDroppedStudents: new Set(),
      addClassRosterRenderTimer: null,
      questionFrozen: false,
      webClassManagerEnabled: false,
      examModeByMon: {},
      selectedExamNoByMon: {},
      examPreviewDone: false,
      hideExamCodeValues: false,
      cv7991Bank: null,
      cv7991BankCatalog: null,
      cv7991BankCatalogPromise: null,
      cv7991BankLoadPromise: null,
      cv7991BankSource: 'word',
      cv7991GeneratedVersions: [],
      cv7991PendingExport: null,
      cv7991SelectedMons: new Set(),
      cv7991WordExportTemplate: 'form1',
      cv7991WordExportMeta: { examTitle: '', district: '', school: '', schoolYear: '', duration: '', evenPagesPerCode: false },
      cv7991WordTemplatePendingAction: '',
      cv7991SpecFilterActive: false,
      regularTestSession: { active: false, slides: [], answers: [], index: 0, title: 'Kiểm tra ngay', uid: '', savedQuestions: {}, answerVisible: false },
      regularTestMatrixReturn: null,
      singleExamRegionTool: { selecting: false, zoomed: false, dragActive: false, selection: null },
      sessionInfo: null,
      sessionTier: '',
      subscriptionOrder: null,
      subscriptionPollTimer: null,
      subscriptionCountdownTimer: null,
      subscriptionSelectedMonths: 0,
      subscriptionExpiredOrderCode: '',
    };

    const els = {
      loginForm: document.getElementById('loginForm'),
      savedAccountCombo: document.getElementById('savedAccountCombo'),
      savedAccountToggle: document.getElementById('savedAccountToggle'),
      savedAccountMenu: document.getElementById('savedAccountMenu'),
      savedAccountSelect: document.getElementById('savedAccountSelect'),
      username: document.getElementById('username'),
      password: document.getElementById('password'),
      loginBtn: document.getElementById('loginBtn'),
      forgotPasswordBtn: document.getElementById('forgotPasswordBtn'),
      subscriptionOpenBtn: document.getElementById('subscriptionOpenBtn'),
      limitedMainUpgradeSlot: document.getElementById('limitedMainUpgradeSlot'),
      limitedMainUpgradeBtn: document.getElementById('limitedMainUpgradeBtn'),
      limitedUpgradeModal: document.getElementById('limitedUpgradeModal'),
      limitedUpgradeMessage: document.getElementById('limitedUpgradeMessage'),
      limitedUpgradeActionBtn: document.getElementById('limitedUpgradeActionBtn'),
      resultClassRequiredModal: document.getElementById('resultClassRequiredModal'),
      resultClassRequiredSelect: document.getElementById('resultClassRequiredSelect'),
      resultClassRequiredCloseBtn: document.getElementById('resultClassRequiredCloseBtn'),
      loginStatus: document.getElementById('loginStatus'),
      classSubjectSelect: document.getElementById('classSubjectSelect'),
      compactClassSubjectSelect: document.getElementById('compactClassSubjectSelect'),
      compactMenuSelect: document.getElementById('compactMenuSelect'),
      compactTimeSelect: document.getElementById('compactTimeSelect'),
      viewResultsBtn: document.getElementById('viewResultsBtn'),
      topViewResultsBtn: document.getElementById('topViewResultsBtn'),
      refreshBtn: document.getElementById('refreshBtn'),
      clearLiveBtn: document.getElementById('clearLiveBtn'),
      logoutBtn: document.getElementById('logoutBtn'),
      classManagerBtn: document.getElementById('classManagerBtn'),
      actionMenuWrap: document.getElementById('actionMenuWrap'),
      actionMenuBtn: document.getElementById('actionMenuBtn'),
      menuResultsBtn: document.getElementById('menuResultsBtn'),
      menuClassManagerBtn: document.getElementById('menuClassManagerBtn'),
      classManagerModal: document.getElementById('classManagerModal'),
      classManagerCloseBtn: document.getElementById('classManagerCloseBtn'),
      classManagerTabRosterBtn: document.getElementById('classManagerTabRosterBtn'),
      classManagerTabExamBtn: document.getElementById('classManagerTabExamBtn'),
      classManagerTabCv7991Btn: document.getElementById('classManagerTabCv7991Btn'),
      classManagerTabOutlineBtn: document.getElementById('classManagerTabOutlineBtn'),
      classManagerRosterPanel: document.getElementById('classManagerRosterPanel'),
      classManagerExamPanel: document.getElementById('classManagerExamPanel'),
      classManagerCv7991Panel: document.getElementById('classManagerCv7991Panel'),
      cv7991Root: document.getElementById('cv7991Root'),
      cv7991PanelTitle: document.getElementById('cv7991PanelTitle'),
      cv7991PanelDesc: document.getElementById('cv7991PanelDesc'),
      cv7991ClassStepTitle: document.getElementById('cv7991ClassStepTitle'),
      cv7991ConfigStepTitle: document.getElementById('cv7991ConfigStepTitle'),
      cv7991OutlineGenerateStepTitle: document.getElementById('cv7991OutlineGenerateStepTitle'),
      cv7991OpenMatrixBtn: document.getElementById('cv7991OpenMatrixBtn'),
      cv7991OpenSpecBtn: document.getElementById('cv7991OpenSpecBtn'),
      cv7991MatrixModal: document.getElementById('cv7991MatrixModal'),
      cv7991SpecModal: document.getElementById('cv7991SpecModal'),
      cv7991MatrixTable: document.getElementById('cv7991MatrixTable'),
      cv7991SpecTable: document.getElementById('cv7991SpecTable'),
      cv7991SpecFilterMatrixBtn: document.getElementById('cv7991SpecFilterMatrixBtn'),
      cv7991ClassChecklist: document.getElementById('cv7991ClassChecklist'),
      cv7991ExamTitleInput: document.getElementById('cv7991ExamTitleInput'),
      cv7991ExamTitleDisplay: document.getElementById('cv7991ExamTitleDisplay'),
      cv7991OpenExamTitleBtn: document.getElementById('cv7991OpenExamTitleBtn'),
      cv7991MatrixExamTitleDisplay: document.getElementById('cv7991MatrixExamTitleDisplay'),
      cv7991MatrixOpenExamTitleBtn: document.getElementById('cv7991MatrixOpenExamTitleBtn'),
      cv7991ExamTitleModal: document.getElementById('cv7991ExamTitleModal'),
      cv7991ExamTitleCloseBtn: document.getElementById('cv7991ExamTitleCloseBtn'),
      cv7991ExamTitleTableWrap: document.getElementById('cv7991ExamTitleTableWrap'),
      cv7991ExamTitleModalInput: document.getElementById('cv7991ExamTitleModalInput'),
      cv7991UseExamTitleBtn: document.getElementById('cv7991UseExamTitleBtn'),
      cv7991QuestionBankSelect: document.getElementById('cv7991QuestionBankSelect'),
      cv7991PresetBankField: document.getElementById('cv7991PresetBankField'),
      cv7991BankSourceWordRadio: document.getElementById('cv7991BankSourceWordRadio'),
      cv7991BankSourceMvipRadio: document.getElementById('cv7991BankSourceMvipRadio'),
      cv7991BankSourceWordCard: document.getElementById('cv7991BankSourceWordCard'),
      cv7991BankSourceMvipCard: document.getElementById('cv7991BankSourceMvipCard'),
      cv7991WordBankStatus: document.getElementById('cv7991WordBankStatus'),
      cv7991MvipBankStatus: document.getElementById('cv7991MvipBankStatus'),
      cv7991WordFileInput: document.getElementById('cv7991WordFileInput'),
      cv7991ImportWordBtn: document.getElementById('cv7991ImportWordBtn'),
      cv7991DownloadTemplateBtn: document.getElementById('cv7991DownloadTemplateBtn'),
      cv7991GenerateModeSingleRadio: document.getElementById('cv7991GenerateModeSingleRadio'),
      cv7991FreezeEssayCheckbox: document.getElementById('cv7991FreezeEssayCheckbox'),
      cv7991SameQuizShuffleCheckbox: document.getElementById('cv7991SameQuizShuffleCheckbox'),
      cv7991FixedFreezeEssayCheckbox: document.getElementById('cv7991FixedFreezeEssayCheckbox'),
      cv7991FixedSameQuizShuffleCheckbox: document.getElementById('cv7991FixedSameQuizShuffleCheckbox'),
      cv7991CodeModePerStudentRadio: document.getElementById('cv7991CodeModePerStudentRadio'),
      cv7991CodeModeCountRadio: document.getElementById('cv7991CodeModeCountRadio'),
      cv7991PerStudentOptionsRow: document.getElementById('cv7991PerStudentOptionsRow'),
      cv7991CodeCountRow: document.getElementById('cv7991CodeCountRow'),
      cv7991CodeCountInput: document.getElementById('cv7991CodeCountInput'),
      cv7991ReviewOutlineCheckbox: document.getElementById('cv7991ReviewOutlineCheckbox'),
      cv7991ScoreToggleBtn: document.getElementById('cv7991ScoreToggleBtn'),
      cv7991ScorePanel: document.getElementById('cv7991ScorePanel'),
      cv7991ScoreMcInput: document.getElementById('cv7991ScoreMcInput'),
      cv7991ScoreTfModeInput: document.getElementById('cv7991ScoreTfModeInput'),
      cv7991ScoreTf1Input: document.getElementById('cv7991ScoreTf1Input'),
      cv7991ScoreTf2Input: document.getElementById('cv7991ScoreTf2Input'),
      cv7991ScoreTf3Input: document.getElementById('cv7991ScoreTf3Input'),
      cv7991ScoreTf4Input: document.getElementById('cv7991ScoreTf4Input'),
      cv7991ScoreShortInput: document.getElementById('cv7991ScoreShortInput'),
      cv7991ScoreEssayInput: document.getElementById('cv7991ScoreEssayInput'),
      cv7991GenerateExamBtn: document.getElementById('cv7991GenerateExamBtn'),
      cv7991GenerateSingleExamBtn: document.getElementById('cv7991GenerateSingleExamBtn'),
      cv7991ReviewOutlineBtn: document.getElementById('cv7991ReviewOutlineBtn'),
      cv7991GenerateExamModal: document.getElementById('cv7991GenerateExamModal'),
      cv7991GenerateExamCloseBtn: document.getElementById('cv7991GenerateExamCloseBtn'),
      cv7991GenerateExamRunBtn: document.getElementById('cv7991GenerateExamRunBtn'),
      cv7991GenerateExamExportBtn: document.getElementById('cv7991GenerateExamExportBtn'),
      cv7991ReviewExportModal: document.getElementById('cv7991ReviewExportModal'),
      cv7991ReviewExportCloseBtn: document.getElementById('cv7991ReviewExportCloseBtn'),
      cv7991ReviewExportMessage: document.getElementById('cv7991ReviewExportMessage'),
      cv7991ReviewExportFiles: document.getElementById('cv7991ReviewExportFiles'),
      cv7991ReviewExportOkBtn: document.getElementById('cv7991ReviewExportOkBtn'),
      cv7991SingleExamOptionsModal: document.getElementById('cv7991SingleExamOptionsModal'),
      cv7991SingleExamOptionsCloseBtn: document.getElementById('cv7991SingleExamOptionsCloseBtn'),
      cv7991SingleExamRunBtn: document.getElementById('cv7991SingleExamRunBtn'),
      cv7991SingleExamExportBtn: document.getElementById('cv7991SingleExamExportBtn'),
      cv7991WordTemplateModal: document.getElementById('cv7991WordTemplateModal'),
      cv7991WordTemplateCloseBtn: document.getElementById('cv7991WordTemplateCloseBtn'),
      cv7991WordTemplateOkBtn: document.getElementById('cv7991WordTemplateOkBtn'),
      cv7991WordExportWait: document.getElementById('cv7991WordExportWait'),
      cv7991WordTemplateForm1Radio: document.getElementById('cv7991WordTemplateForm1Radio'),
      cv7991WordTemplateForm2Radio: document.getElementById('cv7991WordTemplateForm2Radio'),
      cv7991WordTemplateForm3Radio: document.getElementById('cv7991WordTemplateForm3Radio'),
      cv7991WordTemplateForm4Radio: document.getElementById('cv7991WordTemplateForm4Radio'),
      cv7991WordTemplateForm5Radio: document.getElementById('cv7991WordTemplateForm5Radio'),
      cv7991WordTemplateForm1PreviewBtn: document.getElementById('cv7991WordTemplateForm1PreviewBtn'),
      cv7991WordTemplateForm2PreviewBtn: document.getElementById('cv7991WordTemplateForm2PreviewBtn'),
      cv7991WordTemplateForm3PreviewBtn: document.getElementById('cv7991WordTemplateForm3PreviewBtn'),
      cv7991WordTemplateForm4PreviewBtn: document.getElementById('cv7991WordTemplateForm4PreviewBtn'),
      cv7991WordTemplateForm5PreviewBtn: document.getElementById('cv7991WordTemplateForm5PreviewBtn'),
      cv7991WordTemplatePreviewModal: document.getElementById('cv7991WordTemplatePreviewModal'),
      cv7991WordTemplatePreviewTitle: document.getElementById('cv7991WordTemplatePreviewTitle'),
      cv7991WordTemplatePreviewImage: document.getElementById('cv7991WordTemplatePreviewImage'),
      cv7991WordTemplatePreviewCloseBtn: document.getElementById('cv7991WordTemplatePreviewCloseBtn'),
      cv7991WordTemplateForm1Options: document.getElementById('cv7991WordTemplateForm1Options'),
      cv7991WordTemplateExamTitleInput: document.getElementById('cv7991WordTemplateExamTitleInput'),
      cv7991WordTemplateDistrictInput: document.getElementById('cv7991WordTemplateDistrictInput'),
      cv7991WordTemplateSchoolInput: document.getElementById('cv7991WordTemplateSchoolInput'),
      cv7991WordTemplateSchoolYearInput: document.getElementById('cv7991WordTemplateSchoolYearInput'),
      cv7991WordTemplateDurationInput: document.getElementById('cv7991WordTemplateDurationInput'),
      cv7991WordTemplateEssayLineCountInput: document.getElementById('cv7991WordTemplateEssayLineCountInput'),
      cv7991WordTemplateEssayLinesWrap: document.getElementById('cv7991WordTemplateEssayLinesWrap'),
      cv7991WordTemplateEvenPagesCheckbox: document.getElementById('cv7991WordTemplateEvenPagesCheckbox'),
      cv7991WordTemplateLivePreview: document.getElementById('cv7991WordTemplateLivePreview'),
      cv7991WordTemplateLivePreviewLabel: document.getElementById('cv7991WordTemplateLivePreviewLabel'),
      cv7991SortByLevelCheckbox: document.getElementById('cv7991SortByLevelCheckbox'),
      cv7991SortByUnitCheckbox: document.getElementById('cv7991SortByUnitCheckbox'),
      cv7991SpecQuestionNumbersCheckbox: document.getElementById('cv7991SpecQuestionNumbersCheckbox'),
      cv7991SpecQuestionCountsRadio: document.getElementById('cv7991SpecQuestionCountsRadio'),
      cv7991ExportExamBtn: document.getElementById('cv7991ExportExamBtn'),
      cv7991DeleteExamSelect: document.getElementById('cv7991DeleteExamSelect'),
      cv7991DeleteExamBtn: document.getElementById('cv7991DeleteExamBtn'),
      cv7991LoadBankBtn: document.getElementById('cv7991LoadBankBtn'),
      cv7991BankStatus: document.getElementById('cv7991BankStatus'),
      regularTestStartBtn: document.getElementById('regularTestStartBtn'),
      regularTestModal: document.getElementById('regularTestModal'),
      regularTestCloseBtn: document.getElementById('regularTestCloseBtn'),
      regularTestClassText: document.getElementById('regularTestClassText'),
      regularTestTopStatus: document.getElementById('regularTestTopStatus'),
      regularTestBankSelect: document.getElementById('regularTestBankSelect'),
      regularTestLoadBankBtn: document.getElementById('regularTestLoadBankBtn'),
      regularTestBankStatus: document.getElementById('regularTestBankStatus'),
      regularTestOpenMatrixBtn: document.getElementById('regularTestOpenMatrixBtn'),
      regularTestQuestionModal: document.getElementById('regularTestQuestionModal'),
      regularTestQuestionTable: document.getElementById('regularTestQuestionTable'),
      regularTestQuestionTitle: document.getElementById('regularTestQuestionTitle'),
      regularTestQuestionTotal: document.getElementById('regularTestQuestionTotal'),
      regularTestQuestionResetBtn: document.getElementById('regularTestQuestionResetBtn'),
      regularTestQuestionSaveBtn: document.getElementById('regularTestQuestionSaveBtn'),
      regularTestQuestionCloseBtn: document.getElementById('regularTestQuestionCloseBtn'),
      regularTestNoBankModal: document.getElementById('regularTestNoBankModal'),
      regularTestNoBankText: document.getElementById('regularTestNoBankText'),
      regularTestNoBankCloseBtn: document.getElementById('regularTestNoBankCloseBtn'),
      regularTestChoiceModal: document.getElementById('regularTestChoiceModal'),
      regularTestChoiceCloseBtn: document.getElementById('regularTestChoiceCloseBtn'),
      regularTestChoiceClassText: document.getElementById('regularTestChoiceClassText'),
      regularTestChoiceMvipBtn: document.getElementById('regularTestChoiceMvipBtn'),
      regularTestChoiceLocalBtn: document.getElementById('regularTestChoiceLocalBtn'),
      regularTestSampleOpenBtn: document.getElementById('regularTestSampleOpenBtn'),
      regularTestSampleModal: document.getElementById('regularTestSampleModal'),
      regularTestSampleCloseBtn: document.getElementById('regularTestSampleCloseBtn'),
      regularTestChoiceStatus: document.getElementById('regularTestChoiceStatus'),
      regularTestLocalFileInput: document.getElementById('regularTestLocalFileInput'),
      regularTestMatrixSummary: document.getElementById('regularTestMatrixSummary'),
      regularTestBeginBtn: document.getElementById('regularTestBeginBtn'),
      regularTestRunStatus: document.getElementById('regularTestRunStatus'),
      regularTestPrevBtn: document.getElementById('regularTestPrevBtn'),
      regularTestNextBtn: document.getElementById('regularTestNextBtn'),
      regularTestQuestionState: document.getElementById('regularTestQuestionState'),
      singleExamPresenter: document.getElementById('singleExamPresenter'),
      singleExamClassSelect: document.getElementById('singleExamClassSelect'),
      singleExamAnswerBtn: document.getElementById('singleExamAnswerBtn'),
      singleExamToolbarGuideBtn: document.getElementById('singleExamToolbarGuideBtn'),
      singleExamGuideBtn: document.getElementById('singleExamGuideBtn'),
      singleExamGuideModal: document.getElementById('singleExamGuideModal'),
      singleExamGuideDialog: document.getElementById('singleExamGuideDialog'),
      singleExamGuideDragHandle: document.getElementById('singleExamGuideDragHandle'),
      singleExamGuideAnswer: document.getElementById('singleExamGuideAnswer'),
      singleExamGuideContent: document.getElementById('singleExamGuideContent'),
      singleExamGuideCloseBtn: document.getElementById('singleExamGuideCloseBtn'),
      singleExamTitleText: document.getElementById('singleExamTitleText'),
      singleExamProgressText: document.getElementById('singleExamProgressText'),
      singleExamBody: document.getElementById('singleExamBody'),
      singleExamSlide: document.getElementById('singleExamSlide'),
      singleExamLimitedNote: document.getElementById('singleExamLimitedNote'),
      singleExamNextBtn: document.getElementById('singleExamNextBtn'),
      singleExamViewBtn: document.getElementById('singleExamViewBtn'),
      singleExamCloseBtn: document.getElementById('singleExamCloseBtn'),
      singleExamCountdownInput: document.getElementById('singleExamCountdownInput'),
      singleExamFullscreenBtn: document.getElementById('singleExamFullscreenBtn'),
      singleExamRegionBtn: document.getElementById('singleExamRegionBtn'),
      cv7991ResetMatrixBtn: document.getElementById('cv7991ResetMatrixBtn'),
      cv7991MatrixExitBtn: document.getElementById('cv7991MatrixExitBtn'),
      cv7991MatrixSaveBtn: document.getElementById('cv7991MatrixSaveBtn'),
      cv7991TotalMcB: document.getElementById('cv7991TotalMcB'),
      cv7991TotalMcH: document.getElementById('cv7991TotalMcH'),
      cv7991TotalMcV: document.getElementById('cv7991TotalMcV'),
      cv7991TotalMcVdc: document.getElementById('cv7991TotalMcVdc'),
      cv7991TotalTfB: document.getElementById('cv7991TotalTfB'),
      cv7991TotalTfH: document.getElementById('cv7991TotalTfH'),
      cv7991TotalTfV: document.getElementById('cv7991TotalTfV'),
      cv7991TotalTfVdc: document.getElementById('cv7991TotalTfVdc'),
      cv7991TotalShortB: document.getElementById('cv7991TotalShortB'),
      cv7991TotalShortH: document.getElementById('cv7991TotalShortH'),
      cv7991TotalShortV: document.getElementById('cv7991TotalShortV'),
      cv7991TotalShortVdc: document.getElementById('cv7991TotalShortVdc'),
      cv7991TotalEssayB: document.getElementById('cv7991TotalEssayB'),
      cv7991TotalEssayH: document.getElementById('cv7991TotalEssayH'),
      cv7991TotalEssayV: document.getElementById('cv7991TotalEssayV'),
      cv7991TotalEssayVdc: document.getElementById('cv7991TotalEssayVdc'),
      cv7991TotalB: document.getElementById('cv7991TotalB'),
      cv7991TotalH: document.getElementById('cv7991TotalH'),
      cv7991TotalV: document.getElementById('cv7991TotalV'),
      cv7991TotalVdc: document.getElementById('cv7991TotalVdc'),
      cv7991GrandPoint: document.getElementById('cv7991GrandPoint'),
      classManagerSelect: document.getElementById('classManagerSelect'),
      classManagerListRows: document.getElementById('classManagerListRows'),
      examClassManagerChecklist: document.getElementById('examClassManagerChecklist'),
      examConfigEditSelect: document.getElementById('examConfigEditSelect'),
      examConfigNameInput: document.getElementById('examConfigNameInput'),
      newClassSubjectInput: document.getElementById('newClassSubjectInput'),
      addClassSubjectBtn: document.getElementById('addClassSubjectBtn'),
      addClassDialog: document.getElementById('addClassDialog'),
      addClassDialogTitle: document.getElementById('addClassDialogTitle'),
      addClassGradeSelect: document.getElementById('addClassGradeSelect'),
      addClassSubjectSelect: document.getElementById('addClassSubjectSelect'),
      addClassCustomSubjectWrap: document.getElementById('addClassCustomSubjectWrap'),
      addClassCustomSubjectInput: document.getElementById('addClassCustomSubjectInput'),
      addClassNameInput: document.getElementById('addClassNameInput'),
      addClassRosterInput: document.getElementById('addClassRosterInput'),
      addClassRosterTableBody: document.getElementById('addClassRosterTableBody'),
      addClassRosterSummary: document.getElementById('addClassRosterSummary'),
      addClassRosterTableMessage: document.getElementById('addClassRosterTableMessage'),
      addClassSaveBtn: document.getElementById('addClassSaveBtn'),
      addClassCancelBtn: document.getElementById('addClassCancelBtn'),
      addClassCancelTopBtn: document.getElementById('addClassCancelTopBtn'),
      addClassStatus: document.getElementById('addClassStatus'),
      deleteClassSubjectBtn: document.getElementById('deleteClassSubjectBtn'),
      rosterEditor: document.getElementById('rosterEditor'),
      saveRosterBtn: document.getElementById('saveRosterBtn'),
      clearRosterBtn: document.getElementById('clearRosterBtn'),
      examConfigTitleLabel: document.getElementById('examConfigTitleLabel'),
      examCodeCountInput: document.getElementById('examCodeCountInput'),
      examQuestionCountInput: document.getElementById('examQuestionCountInput'),
      examAnswerKeysEditor: document.getElementById('examAnswerKeysEditor'),
      saveExamConfigBtn: document.getElementById('saveExamConfigBtn'),
      clearExamConfigBtn: document.getElementById('clearExamConfigBtn'),
      examAssignPreview: document.getElementById('examAssignPreview'),
      confirmActionModal: document.getElementById('confirmActionModal'),
      confirmActionMessage: document.getElementById('confirmActionMessage'),
      confirmActionOkBtn: document.getElementById('confirmActionOkBtn'),
      confirmActionCancelBtn: document.getElementById('confirmActionCancelBtn'),
      alertModal: document.getElementById('alertModal'),
      alertModalTitle: document.getElementById('alertModalTitle'),
      alertModalMessage: document.getElementById('alertModalMessage'),
      alertModalOkBtn: document.getElementById('alertModalOkBtn'),
      classManagerStatus: document.getElementById('classManagerStatus'),
      authStatePill: document.getElementById('authStatePill'),
      authStateText: document.getElementById('authStateText'),
      wsStatePill: document.getElementById('wsStatePill'),
      wsStateText: document.getElementById('wsStateText'),
      classCount: document.getElementById('classCount'),
      studentCount: document.getElementById('studentCount'),
      liveCount: document.getElementById('liveCount'),
      savedCount: document.getElementById('savedCount'),
      currentBoardTitle: document.getElementById('currentBoardTitle'),
      currentBoardSub: document.getElementById('currentBoardSub'),
      examModeEnterBtn: document.getElementById('examModeEnterBtn'),
      examModeExitBtn: document.getElementById('examModeExitBtn'),
      historySub: document.getElementById('historySub'),
      sumAnswered: document.getElementById('sumAnswered'),
      sumA: document.getElementById('sumA'),
      sumB: document.getElementById('sumB'),
      sumC: document.getElementById('sumC'),
      sumD: document.getElementById('sumD'),
      correctBtnA: document.getElementById('correctBtnA'),
      correctBtnB: document.getElementById('correctBtnB'),
      correctBtnC: document.getElementById('correctBtnC'),
      correctBtnD: document.getElementById('correctBtnD'),
      finishAutoBtn: document.getElementById('finishAutoBtn'),
      examRescanBtn: document.getElementById('examRescanBtn'),
      useExamCodesCheckbox: document.getElementById('useExamCodesCheckbox'),
      examDoneBtn: document.getElementById('examDoneBtn'),
      examModeExtra: document.getElementById('examModeExtra'),
      examSerialSelect: document.getElementById('examSerialSelect'),
      examQuestionLabel: document.getElementById('examQuestionLabel'),
      hideExamCodesCheckbox: document.getElementById('hideExamCodesCheckbox'),
      hideExamCodesLabel: document.getElementById('hideExamCodesLabel'),
      examFontSizeWrap: document.getElementById('examFontSizeWrap'),
      examFontSizeSelect: document.getElementById('examFontSizeSelect'),
      examColumnCountWrap: document.getElementById('examColumnCountWrap'),
      examColumnCountSelect: document.getElementById('examColumnCountSelect'),
      hideRevealBtn: document.getElementById('hideRevealBtn'),
      fontSizeSelect: document.getElementById('fontSizeSelect'),
      columnCountSelect: document.getElementById('columnCountSelect'),
      studentBoardShell: document.getElementById('studentBoardShell'),
      studentBoard: document.getElementById('studentBoard'),
      studentBoardLimitedNote: document.getElementById('studentBoardLimitedNote'),
      studentColumns: document.getElementById('studentColumns'),
      studentEmpty: document.getElementById('studentEmpty'),
      historyBody: document.getElementById('historyBody'),
      historyEmpty: document.getElementById('historyEmpty'),
      detailEmpty: document.getElementById('detailEmpty'),
      detailWrap: document.getElementById('detailWrap'),
      detailMon: document.getElementById('detailMon'),
      detailQ: document.getElementById('detailQ'),
      detailCorrect: document.getElementById('detailCorrect'),
      detailRate: document.getElementById('detailRate'),
      answerList: document.getElementById('answerList'),
      heroClassCount: document.getElementById('heroClassCount'),
      heroStudentCount: document.getElementById('heroStudentCount'),
      heroSavedCount: document.getElementById('heroSavedCount'),
      heroLiveCount: document.getElementById('heroLiveCount'),
      accountDataNote: document.getElementById('accountDataNote'),
      subscriptionModal: document.getElementById('subscriptionModal'),
      subscriptionCloseBtn: document.getElementById('subscriptionCloseBtn'),
      subscriptionPackageGrid: document.getElementById('subscriptionPackageGrid'),
      subscriptionQrWrap: document.getElementById('subscriptionQrWrap'),
      subscriptionPlaceholder: document.getElementById('subscriptionPlaceholder'),
      subscriptionQrImage: document.getElementById('subscriptionQrImage'),
      subscriptionDetails: document.getElementById('subscriptionDetails'),
      subscriptionOrderCode: document.getElementById('subscriptionOrderCode'),
      subscriptionOrderAmount: document.getElementById('subscriptionOrderAmount'),
      subscriptionPaymentContent: document.getElementById('subscriptionPaymentContent'),
      subscriptionCopyContentBtn: document.getElementById('subscriptionCopyContentBtn'),
      subscriptionBankText: document.getElementById('subscriptionBankText'),
      subscriptionAccountText: document.getElementById('subscriptionAccountText'),
      subscriptionHolderText: document.getElementById('subscriptionHolderText'),
      subscriptionTimeLeft: document.getElementById('subscriptionTimeLeft'),
      subscriptionStatus: document.getElementById('subscriptionStatus'),
      resultModal: document.getElementById('resultModal'),
      resultCorrectBadge: document.getElementById('resultCorrectBadge'),
      resultRateText: document.getElementById('resultRateText'),
      resultSaveBtn: document.getElementById('resultSaveBtn'),
      resultRepickBtn: document.getElementById('resultRepickBtn'),
      resultCancelBtn: document.getElementById('resultCancelBtn'),
      reportModal: document.getElementById('reportModal'),
      reportCloseBtn: document.getElementById('reportCloseBtn'),
      reportGenerateBtn: document.getElementById('reportGenerateBtn'),
      reportExportBtn: document.getElementById('reportExportBtn'),
      reportDatasetNormal: document.getElementById('reportDatasetNormal'),
      reportDatasetExam: document.getElementById('reportDatasetExam'),
      reportNormalFilterBox: document.getElementById('reportNormalFilterBox'),
      reportExamFilterBox: document.getElementById('reportExamFilterBox'),
      reportModeQuestion: document.getElementById('reportModeQuestion'),
      reportModeTime: document.getElementById('reportModeTime'),
      reportExamNo: document.getElementById('reportExamNo'),
      reportQFrom: document.getElementById('reportQFrom'),
      reportQTo: document.getElementById('reportQTo'),
      reportDateFrom: document.getElementById('reportDateFrom'),
      reportDateTo: document.getElementById('reportDateTo'),
      reportExamNoWrap: document.getElementById('reportExamNoWrap'),
      reportQuestionFromWrap: document.getElementById('reportQuestionFromWrap'),
      reportQuestionToWrap: document.getElementById('reportQuestionToWrap'),
      reportDateFromWrap: document.getElementById('reportDateFromWrap'),
      reportDateToWrap: document.getElementById('reportDateToWrap'),
      reportPreviewTitle: document.getElementById('reportPreviewTitle'),
      reportPreviewMeta: document.getElementById('reportPreviewMeta'),
      reportPreviewWrap: document.getElementById('reportPreviewWrap')
    };

    function normMonKey(value) {
      return String(value || '').trim().replace(/\s*-\s*/g, '-').replace(/\s+/g, ' ');
    }

    function normalizeStudentId(value) {
      const s = String(value == null ? '' : value).trim();
      if (!/^\d+$/.test(s)) return null;
      if (s.length > 1 && s.startsWith('0')) return s;
      return String(parseInt(s, 10));
    }

    function studentAliases(value) {
      const s = normalizeStudentId(value);
      if (s == null) return [];
      const out = [];
      const add = (v) => {
        const x = String(v || '').trim();
        if (x && !out.includes(x)) out.push(x);
      };
      add(s);
      const n = parseInt(s, 10);
      if (!Number.isNaN(n)) {
        add(String(n));
        if (n >= 0 && n <= 99) add(String(n).padStart(2, '0'));
      }
      return out;
    }

    function resolveStudentKey(studentsMap, value) {
      const aliases = studentAliases(value);
      for (const k of aliases) {
        if (Object.prototype.hasOwnProperty.call(studentsMap || {}, k)) return k;
      }
      return null;
    }

    function escapeHtml(text) {
      return String(text == null ? '' : text)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#039;');
    }

    function formatDateTime(value) {
      if (!value) return '-';
      const s = String(value);
      if (s.includes('T')) {
        const [date, rest] = s.split('T');
        const time = (rest || '').split('.')[0].split('+')[0];
        return `${date} ${time}`.trim();
      }
      return s;
    }

    function shortenName(fullname, existed) {
      const parts = String(fullname || '').trim().split(/\s+/).filter(Boolean);
      if (!parts.length) return String(fullname || '').trim();
      let short = parts[parts.length - 1];
      if (!existed.has(short)) return short;
      for (let i = parts.length - 2; i >= 0; i -= 1) {
        const ch = (parts[i] || '').slice(0, 1).toUpperCase();
        if (!ch) continue;
        short = `${ch}.${short}`;
        if (!existed.has(short)) return short;
      }
      return short;
    }

    function splitIntoColumns(keys, count) {
      const raw = parseInt(String(count || 0), 10);
      const num = Number.isNaN(raw) ? 3 : Math.max(1, raw);
      const columns = Array.from({ length: num }, () => []);
      const perCol = keys.length ? Math.ceil(keys.length / num) : 0;
      keys.forEach((so, idx) => {
        const col = perCol > 0 ? Math.min(num - 1, Math.floor(idx / perCol)) : 0;
        columns[col].push(so);
      });
      return columns.filter(col => col.length);
    }

    function classManagerStatus(message = '', type = '') {
      if (!els.classManagerStatus) return;
      els.classManagerStatus.textContent = message;
      els.classManagerStatus.className = `class-manager-status${type ? ' ' + type : ''}`;
    }

    function classDataStudents(mon) {
      const obj = state.classData[mon] || {};
      return (obj && typeof obj.students === 'object' && obj.students) ? obj.students : {};
    }

    function droppedStudentIdsFromValue(rawValue) {
      let value = rawValue;
      if (value instanceof Set) value = Array.from(value);
      if (typeof value === 'string') {
        const text = value.trim();
        if (!text) return [];
        try { value = JSON.parse(text); }
        catch (_) { value = text.split(/[\s,;|]+/).filter(Boolean); }
      }
      if (Array.isArray(value)) return value;
      if (!value || typeof value !== 'object') return [];
      return Object.keys(value).filter((key) => {
        const flag = value[key];
        if (flag === false || flag === 0 || flag == null) return false;
        const flagText = String(flag).trim().toLowerCase();
        return !['', '0', 'false', 'no', 'không', 'khong'].includes(flagText);
      });
    }

    function normalizeDroppedStudents(rawValue, studentsMap = {}) {
      const students = (studentsMap && typeof studentsMap === 'object') ? studentsMap : {};
      const hasRoster = Object.keys(students).length > 0;
      const out = {};
      droppedStudentIdsFromValue(rawValue).forEach((rawSo) => {
        const rosterKey = resolveStudentKey(students, rawSo);
        const normalized = rosterKey || normalizeStudentId(rawSo);
        if (!normalized) return;
        if (hasRoster && !rosterKey) return;
        out[rosterKey || normalized] = true;
      });
      return out;
    }

    function classDataDroppedStudents(mon) {
      const key = normMonKey(mon || '');
      const obj = (state.classData[key] && typeof state.classData[key] === 'object') ? state.classData[key] : {};
      const students = (obj.students && typeof obj.students === 'object') ? obj.students : {};
      return normalizeDroppedStudents(obj.droppedStudents, students);
    }

    function ensureClassEntry(mon) {
      const key = normMonKey(mon);
      if (!key) return null;
      if (!state.classData[key] || typeof state.classData[key] !== 'object') state.classData[key] = {};
      if (!state.classData[key].students || typeof state.classData[key].students !== 'object') state.classData[key].students = {};
      state.classData[key].droppedStudents = normalizeDroppedStudents(state.classData[key].droppedStudents, state.classData[key].students);
      if (!Array.isArray(state.classData[key].examConfigs)) state.classData[key].examConfigs = [];
      return state.classData[key];
    }

    function sortedStudentKeysFromMap(studentsMap) {
      return Object.keys(studentsMap || {}).sort((a, b) => {
        const aa = /^\d+$/.test(a) ? parseInt(a, 10) : Number.MAX_SAFE_INTEGER;
        const bb = /^\d+$/.test(b) ? parseInt(b, 10) : Number.MAX_SAFE_INTEGER;
        if (aa !== bb) return aa - bb;
        return String(a).localeCompare(String(b), 'vi');
      });
    }

    function parseAnswerKeySequence(value) {
      return (String(value || '').toUpperCase().match(/[ABCD]/g) || []);
    }

    function normalizeScanAnswerToken(value) {
      const raw = String(value == null ? '' : value).trim();
      if (!raw) return '';
      const upper = raw.toUpperCase();
      const noAccent = (upper.normalize ? upper.normalize('NFD').replace(/[\u0300-\u036f]/g, '') : upper).replace(/Đ/g, 'D');
      if (upper === 'Đ' || noAccent === 'DUNG' || noAccent === 'DUNG.' || noAccent === 'TRUE' || upper === 'T') return 'D';
      if (noAccent === 'SAI' || noAccent === 'FALSE' || upper === 'S' || upper === 'F') return 'A';
      const first = upper.charAt(0);
      return ['A', 'B', 'C', 'D'].includes(first) ? first : '';
    }

    function parseFlexibleAnswerKeySequence(value) {
      if (Array.isArray(value)) {
        return value.map(normalizeScanAnswerToken).filter((x) => ['A', 'B', 'C', 'D'].includes(x));
      }
      const text = String(value || '').trim();
      if (!text) return [];
      const tokens = [];
      const re = /(Đúng|Dung|True|Sai|False|Đ|[ABCDS])/gi;
      let match;
      while ((match = re.exec(text))) {
        const token = normalizeScanAnswerToken(match[1]);
        if (token) tokens.push(token);
      }
      return tokens;
    }

    function buildEvenCodeAssignments(studentsMap, codeOrder) {
      const codes = Array.isArray(codeOrder) ? codeOrder.map((x) => String(x || '').trim()).filter(Boolean) : [];
      const students = sortedStudentKeysFromMap(studentsMap);
      const out = {};
      if (!codes.length) return out;
      students.forEach((so, idx) => {
        out[so] = codes[idx % codes.length];
      });
      return out;
    }

    function decodePackedJson(value, fallback = value) {
      if (typeof value === 'string') {
        const txt = value.trim();
        if (!txt) return fallback;
        try {
          return JSON.parse(txt);
        } catch (_) {
          return fallback;
        }
      }
      return fallback;
    }

    function normalizeStoredExamConfig(raw, studentsMap) {
      raw = decodePackedJson(raw, raw);
      const cfg = (raw && typeof raw === 'object') ? raw : {};
      const answerKeysRaw = (cfg.answerKeys && typeof cfg.answerKeys === 'object') ? cfg.answerKeys : {};
      let codeOrder = Array.isArray(cfg.codeOrder)
        ? cfg.codeOrder.map((x) => String(x || '').trim()).filter(Boolean)
        : Object.keys(answerKeysRaw).map((x) => String(x || '').trim()).filter(Boolean);
      let answerKeys = {};
      codeOrder.forEach((code) => {
        const rawValue = answerKeysRaw[code];
        const arr = parseFlexibleAnswerKeySequence(rawValue);
        if (arr.length) answerKeys[code] = arr;
      });
      codeOrder = codeOrder.filter((code) => Array.isArray(answerKeys[code]) && answerKeys[code].length > 0);
      const maxLen = codeOrder.reduce((acc, code) => Math.max(acc, (answerKeys[code] || []).length), 0);
      let questionCount = parseInt(String(cfg.questionCount || maxLen), 10);
      if (Number.isNaN(questionCount) || questionCount < 1) questionCount = maxLen;
      const valid = questionCount > 0 && codeOrder.length > 0 && codeOrder.every((code) => (answerKeys[code] || []).length === questionCount);
      const normalizeQuestionLabels = (value) => {
        const arr = Array.isArray(value) ? value.map((x) => String(x || '').trim()).filter(Boolean) : [];
        return arr.length === questionCount ? arr : [];
      };
      const rawLabelsByCode = (cfg.questionLabelsByCode && typeof cfg.questionLabelsByCode === 'object') ? cfg.questionLabelsByCode : {};
      const questionLabelsByCode = {};
      codeOrder.forEach((code) => {
        const labels = normalizeQuestionLabels(rawLabelsByCode[code]);
        if (labels.length) questionLabelsByCode[code] = labels;
      });
      const explicitQuestionLabels = normalizeQuestionLabels(cfg.questionLabels);
      const defaultQuestionLabels = explicitQuestionLabels.length
        ? explicitQuestionLabels
        : ((codeOrder.length && questionLabelsByCode[codeOrder[0]]) || []);
      const students = (studentsMap && typeof studentsMap === 'object') ? studentsMap : {};
      const rawStudentCodes = (cfg.studentCodes && typeof cfg.studentCodes === 'object') ? cfg.studentCodes : {};
      const preservedStudentCodes = {};
      Object.keys(rawStudentCodes).forEach((so) => {
        const code = String(rawStudentCodes[so] || '').trim();
        if (code && codeOrder.includes(code)) preservedStudentCodes[so] = code;
      });
      const rawScoringConfig = rawScoringConfigFromObject(cfg, {});
      const scoringConfig = normalizeExamScoringConfig(rawScoringConfig, questionCount, codeOrder);
      let examNo = parseInt(String(cfg.examNo || 0), 10);
      if (Number.isNaN(examNo) || examNo < 1) examNo = 0;
      const name = String(cfg.name || cfg.examName || '').trim();
      return {
        enabled: !!cfg.enabled && valid,
        examNo,
        examUid: String(cfg.examUid || cfg.exam_uid || cfg.uid || '').trim(),
        createdAt: String(cfg.createdAt || cfg.created_at || '').trim(),
        name,
        questionCount,
        codeOrder,
        answerKeys,
        questionLabels: defaultQuestionLabels.length ? defaultQuestionLabels : Array.from({ length: questionCount }, (_, idx) => String(idx + 1)),
        questionLabelsByCode,
        studentCodes: Object.keys(preservedStudentCodes).length ? preservedStudentCodes : buildEvenCodeAssignments(students, codeOrder),
        scoringConfig
      };
    }

    function normalizeExamConfigCollection(rawConfigs, legacyConfig, studentsMap) {
      rawConfigs = decodePackedJson(rawConfigs, rawConfigs);
      legacyConfig = decodePackedJson(legacyConfig, legacyConfig);
      const list = [];
      const pushCfg = (raw) => {
        const cfg = normalizeStoredExamConfig(raw, studentsMap);
        if (cfg && cfg.enabled && cfg.examNo > 0 && cfg.codeOrder && cfg.codeOrder.length && cfg.questionCount > 0) {
          list.push(cfg);
        }
      };
      if (Array.isArray(rawConfigs)) {
        rawConfigs.forEach(pushCfg);
      } else if (rawConfigs && typeof rawConfigs === 'object') {
        Object.keys(rawConfigs).forEach((key) => pushCfg(rawConfigs[key]));
      }
      if (!list.length && legacyConfig && typeof legacyConfig === 'object') pushCfg(legacyConfig);
      const byNo = new Map();
      list.forEach((cfg) => {
        const examNo = parseInt(String(cfg.examNo || 0), 10);
        if (!Number.isNaN(examNo) && examNo > 0) byNo.set(examNo, cfg);
      });
      return Array.from(byNo.entries()).sort((a, b) => a[0] - b[0]).map(([, cfg]) => cfg);
    }

    function syncExamConfigsForEntry(entry, studentsMap) {
      const safeEntry = (entry && typeof entry === 'object') ? entry : {};
      const configs = normalizeExamConfigCollection(safeEntry.examConfigs, safeEntry.examConfig, studentsMap);
      configs.forEach((cfg) => {
        if (cfg && !cfg.examUid && hasPerCodeQuestionLabels(cfg)) {
          cfg.examUid = stableExamUidForConfig(cfg);
          cfg.createdAt = cfg.createdAt || '';
        }
      });
      safeEntry.examConfigs = configs;
      safeEntry.examConfig = configs.length
        ? configs[configs.length - 1]
        : normalizeStoredExamConfig(safeEntry.examConfig, studentsMap);
      const maxExamNo = configs.reduce((max, cfg) => Math.max(max, parseInt(String(cfg.examNo || 0), 10) || 0), 0);
      safeEntry.examConfigSaveCount = Math.max(examConfigSaveCount(safeEntry), maxExamNo);
      return configs;
    }

    function emptyExamConfig() {
      return { enabled: false, examNo: 0, examUid: '', createdAt: '', name: '', questionCount: 0, codeOrder: [], answerKeys: {}, questionLabels: [], questionLabelsByCode: {}, studentCodes: {}, scoringConfig: defaultExamScoringConfig(0) };
    }

    function makeExamUid(mon = '', examNo = 0) {
      const key = normMonKey(mon || state.currentMon || 'lop');
      const no = parseInt(String(examNo || 0), 10) || 0;
      const rnd = Math.random().toString(36).slice(2, 10);
      return `${key}_${no}_${Date.now()}_${rnd}`;
    }

    function simpleHashText(value) {
      const text = String(value || '');
      let hash = 2166136261;
      for (let i = 0; i < text.length; i += 1) {
        hash ^= text.charCodeAt(i);
        hash = Math.imul(hash, 16777619);
      }
      return (hash >>> 0).toString(36);
    }

    function stableExamUidForConfig(cfg) {
      const safe = cfg && typeof cfg === 'object' ? cfg : {};
      const source = JSON.stringify({
        examNo: safe.examNo || 0,
        name: safe.name || '',
        questionCount: safe.questionCount || 0,
        codeOrder: safe.codeOrder || [],
        answerKeys: safe.answerKeys || {},
        questionLabels: safe.questionLabels || [],
        questionLabelsByCode: safe.questionLabelsByCode || {}
      });
      return `stable_${safe.examNo || 0}_${simpleHashText(source)}`;
    }

    function hasPerCodeQuestionLabels(cfg) {
      return !!(cfg && cfg.questionLabelsByCode && typeof cfg.questionLabelsByCode === 'object' && Object.keys(cfg.questionLabelsByCode).length);
    }

    function sameExamInstanceRecord(item, cfg) {
      if (!cfg || !cfg.examUid) return true;
      return String((item && item.exam_uid) || '').trim() === String(cfg.examUid || '').trim();
    }

    function purgeExamHistoryForConfig(mon, examNo, examUid = '') {
      const key = normMonKey(mon || '');
      const no = parseInt(String(examNo || 0), 10) || 0;
      if (!key || !no || !Array.isArray(state.scanHistory[key])) return false;
      const uid = String(examUid || '').trim();
      const before = state.scanHistory[key].length;
      state.scanHistory[key] = state.scanHistory[key].filter((item) => {
        if (!isMultiCodeRecord(item) || recordExamNumber(item) !== no) return true;
        if (!uid) return false;
        return String((item && item.exam_uid) || '').trim() === uid;
      });
      return state.scanHistory[key].length !== before;
    }

    function examConfigsForMon(mon) {
      const key = normMonKey(mon || '');
      if (!key || !state.classData[key]) return [];
      const entry = ensureClassEntry(key);
      return syncExamConfigsForEntry(entry, classDataStudents(key));
    }

    function latestExamConfigForMon(mon) {
      const configs = examConfigsForMon(mon);
      return configs.length ? configs[configs.length - 1] : emptyExamConfig();
    }

    function completedQuestionCountForExam(mon, examNo) {
      const key = normMonKey(mon || '');
      const no = parseInt(String(examNo || 0), 10) || 0;
      if (!key || !no) return 0;
      const cfg = examConfigsForMon(key).find((entry) => entry.examNo === no) || null;
      const seen = new Set();
      historyListByDataset(key, 'exam')
        .filter((item) => recordExamNumber(item) === no && sameExamInstanceRecord(item, cfg))
        .forEach((item) => {
          const q = parseInt(String(item && item.q || 0), 10);
          if (!Number.isNaN(q) && q > 0) seen.add(q);
        });
      return seen.size;
    }

    function availableExamConfigs(mon) {
      const key = normMonKey(mon || '');
      return examConfigsForMon(key).filter((cfg) => completedQuestionCountForExam(key, cfg.examNo) < cfg.questionCount);
    }

    function editableExamConfigsForMon(mon) {
      const key = normMonKey(mon || '');
      return examConfigsForMon(key).filter((cfg) => completedQuestionCountForExam(key, cfg.examNo) === 0);
    }

    function selectedExamNoForMon(mon) {
      const key = normMonKey(mon || state.currentMon || '');
      if (!key) return 0;
      const available = availableExamConfigs(key);
      const current = parseInt(String((state.selectedExamNoByMon || {})[key] || 0), 10);
      if (!Number.isNaN(current) && available.some((cfg) => cfg.examNo === current)) return current;
      const fallback = available.length ? available[0].examNo : 0;
      if (fallback) {
        if (!state.selectedExamNoByMon || typeof state.selectedExamNoByMon !== 'object') state.selectedExamNoByMon = {};
        state.selectedExamNoByMon[key] = fallback;
      } else if (state.selectedExamNoByMon && typeof state.selectedExamNoByMon === 'object') {
        delete state.selectedExamNoByMon[key];
      }
      return fallback;
    }

    function setSelectedExamNoForMon(mon, examNo) {
      const key = normMonKey(mon || state.currentMon || '');
      if (!key) return;
      const value = parseInt(String(examNo || 0), 10);
      if (Number.isNaN(value) || value < 1) {
        if (state.selectedExamNoByMon && typeof state.selectedExamNoByMon === 'object') delete state.selectedExamNoByMon[key];
        return;
      }
      if (!state.selectedExamNoByMon || typeof state.selectedExamNoByMon !== 'object') state.selectedExamNoByMon = {};
      state.selectedExamNoByMon[key] = value;
    }

    function selectedExamConfigForMon(mon) {
      const key = normMonKey(mon || state.currentMon || '');
      if (!key) return emptyExamConfig();
      const examNo = selectedExamNoForMon(key);
      const cfg = availableExamConfigs(key).find((item) => item.examNo === examNo)
        || examConfigsForMon(key).find((item) => item.examNo === examNo)
        || latestExamConfigForMon(key);
      return cfg || emptyExamConfig();
    }

    function examConfigSaveCount(entry) {
      const raw = entry && typeof entry === 'object' ? entry.examConfigSaveCount : 0;
      const value = parseInt(String(raw || 0), 10);
      return Number.isNaN(value) || value < 0 ? 0 : value;
    }

    function examConfigNameText(cfg) {
      return String((cfg && (cfg.name || cfg.examName || cfg.examTitle || cfg.title)) || '').trim();
    }

    function normalizeExamConfigNameForCompare(value) {
      return String(value || '').trim().replace(/\s+/g, ' ').toLocaleLowerCase('vi-VN');
    }

    function hasDuplicateExamConfigNameForEntry(entry, configName, ignoreExamNo = 0) {
      const normalized = normalizeExamConfigNameForCompare(configName);
      if (!normalized) return false;
      const safeEntry = entry && typeof entry === 'object' ? entry : { students: {}, examConfigs: [], examConfig: emptyExamConfig() };
      const configs = syncExamConfigsForEntry(safeEntry, safeEntry.students || {});
      const ignored = parseInt(String(ignoreExamNo || 0), 10);
      return configs.some((cfg) => {
        const cfgExamNo = parseInt(String((cfg && cfg.examNo) || 0), 10);
        if (!Number.isNaN(ignored) && ignored > 0 && cfgExamNo === ignored) return false;
        return normalizeExamConfigNameForCompare(examConfigNameText(cfg)) === normalized;
      });
    }

    function examConfigLabel(cfg) {
      if (!cfg || !cfg.examNo) return '';
      const name = examConfigNameText(cfg);
      return name || `Đề ${cfg.examNo}`;
    }

    function examConfigLabelByNo(mon, examNo) {
      const key = normMonKey(mon || '');
      const value = parseInt(String(examNo || 0), 10);
      if (!key || Number.isNaN(value) || value < 1) return '';
      const cfg = examConfigsForMon(key).find((item) => item.examNo === value);
      return cfg ? examConfigLabel(cfg) : `Đề ${value}`;
    }

    function renderExamConfigTitle() {
      if (!els.examConfigTitleLabel) return;
      els.examConfigTitleLabel.textContent = 'Lưu cấu hình cho Lớp - Môn';
    }

    function examConfigEditorText(cfg) {
      if (!cfg || !cfg.codeOrder || !cfg.codeOrder.length) return '';
      return cfg.codeOrder.map((code) => `${code}: ${(cfg.answerKeys[code] || []).join('')}`).join('\n');
    }

    function buildExamPreviewTextForMon(key, cfg, students) {
      if (!key) return '';
      const name = examConfigNameText(cfg);
      if (!cfg.enabled) {
        return `${key}: chưa bật chế độ chấm theo mã đề.`;
      }
      const counts = {};
      cfg.codeOrder.forEach((code) => { counts[code] = 0; });
      Object.values(cfg.studentCodes || {}).forEach((code) => {
        if (Object.prototype.hasOwnProperty.call(counts, code)) counts[code] += 1;
      });
      const countText = cfg.codeOrder.map((code) => `${code}: ${counts[code] || 0} HS`).join(' | ');
      const previewStudents = sortedStudentKeysFromMap(students).slice(0, 8).map((so) => `${so}${students[so] || ''} → ${cfg.studentCodes[so] || '-'}`);
      return `${key}: ${name ? `"${name}" · ` : ''}${cfg.questionCount} câu · ${cfg.codeOrder.length} mã đề.
Phân bổ: ${countText}.${previewStudents.length ? `
Ví dụ:
${previewStudents.join('\n')}` : ''}`;
    }

    function renderExamConfigEditor(selection) {
      if (!els.examCodeCountInput || !els.examQuestionCountInput || !els.examAnswerKeysEditor || !els.examAssignPreview) return;
      const keys = (Array.isArray(selection) ? selection : [selection]).map(normMonKey).filter(Boolean);
      const primaryKey = keys[0] || '';
      const entry = primaryKey ? ensureClassEntry(primaryKey) : null;
      const students = entry ? classDataStudents(primaryKey) : {};
      const editableConfigs = primaryKey ? editableExamConfigsForMon(primaryKey) : [];
      const availableEditNos = editableConfigs.map((cfg) => parseInt(String(cfg.examNo || 0), 10)).filter((value) => !Number.isNaN(value) && value > 0);
      const currentEditNo = parseInt(String(state.managerExamEditNo || 0), 10);
      const editExamNo = availableEditNos.includes(currentEditNo) ? currentEditNo : 0;
      state.managerExamEditNo = editExamNo;
      const editingCfg = editExamNo
        ? editableConfigs.find((cfg) => parseInt(String(cfg.examNo || 0), 10) === editExamNo)
        : null;
      const latestCfg = entry ? normalizeStoredExamConfig(entry.examConfig, students) : emptyExamConfig();
      const editorCfg = editingCfg || emptyExamConfig();
      const previewCfg = editingCfg || latestCfg;
      renderExamConfigTitle();
      if (els.examConfigNameInput) els.examConfigNameInput.readOnly = !keys.length;
      if (els.examCodeCountInput) els.examCodeCountInput.readOnly = !keys.length;
      if (els.examQuestionCountInput) els.examQuestionCountInput.readOnly = !keys.length;
      if (els.examAnswerKeysEditor) els.examAnswerKeysEditor.readOnly = !keys.length;
      if (els.saveExamConfigBtn) els.saveExamConfigBtn.disabled = !keys.length;
      if (els.examConfigEditSelect) {
        const hasEditableConfigs = editableConfigs.length > 0;
        const options = [hasEditableConfigs
          ? '<option value="" disabled ' + (!editExamNo ? 'selected' : '') + '>chọn đề đã lưu chưa dùng</option>'
          : '<option value="" selected disabled>Chưa có đề đã lưu chưa dùng</option>'
        ];
        editableConfigs.forEach((item) => {
          const label = examConfigLabel(item) || `Đề ${item.examNo}`;
          options.push(`<option value="${escapeHtml(String(item.examNo))}" ${item.examNo === editExamNo ? 'selected' : ''}>${escapeHtml(label)} · ${escapeHtml(String(item.questionCount || 0))} câu · ${escapeHtml(String((item.codeOrder || []).length || 0))} mã đề</option>`);
        });
        els.examConfigEditSelect.innerHTML = options.join('');
        els.examConfigEditSelect.disabled = !primaryKey || !hasEditableConfigs;
      }
      if (els.examConfigNameInput) els.examConfigNameInput.value = editingCfg ? examConfigNameText(editorCfg) : '';
      els.examCodeCountInput.value = editingCfg && editorCfg.codeOrder.length ? String(editorCfg.codeOrder.length) : '';
      els.examQuestionCountInput.value = editingCfg && editorCfg.questionCount ? String(editorCfg.questionCount) : '';
      els.examAnswerKeysEditor.value = editingCfg ? examConfigEditorText(editorCfg) : '';
      if (els.clearExamConfigBtn) {
        els.clearExamConfigBtn.textContent = 'Xóa đề đang chọn';
        els.clearExamConfigBtn.disabled = !keys.length || !editExamNo;
      }
      if (!keys.length) {
        els.examAssignPreview.textContent = 'Tích chọn ít nhất 1 Lớp - Môn để biên soạn đề trắc nghiệm.';
        return;
      }
      if (keys.length === 1) {
        const intro = editExamNo && editingCfg
          ? `Đang sửa đề chưa dùng: ${examConfigLabel(editingCfg) || `Đề ${editingCfg.examNo}`}.

`
          : '';
        els.examAssignPreview.textContent = `${intro}${buildExamPreviewTextForMon(primaryKey, previewCfg, students)}`;
        return;
      }
      const lines = [`Đang biên soạn chung cho ${keys.length} Lớp - Môn.`, `Khung nhập hiện lấy dữ liệu theo lớp đầu tiên: ${primaryKey}.`];
      if (editExamNo && editingCfg) lines.push(`Đang sửa cấu hình chưa dùng của lớp đầu tiên: ${examConfigLabel(editingCfg) || `Đề ${editingCfg.examNo}`}.`);
      lines.push('');
      keys.slice(0, 8).forEach((key) => {
        const entryItem = ensureClassEntry(key);
        const stu = classDataStudents(key);
        const cfgItem = normalizeStoredExamConfig(entryItem.examConfig, stu);
        lines.push(buildExamPreviewTextForMon(key, cfgItem, stu));
        lines.push('');
      });
      if (keys.length > 8) lines.push(`... và ${keys.length - 8} Lớp - Môn khác.`);
      els.examAssignPreview.textContent = lines.join('\n').trim();
    }

    function currentExamConfig() {
      const mon = normMonKey(state.currentMon || '');
      if (!mon || !state.classData[mon]) return emptyExamConfig();
      return selectedExamConfigForMon(mon);
    }

    function hasValidExamConfig(cfg) {
      return !!(cfg && cfg.enabled && cfg.codeOrder && cfg.codeOrder.length && cfg.questionCount > 0);
    }

    function examModePreferenceForMon(mon) {
      const key = normMonKey(mon || '');
      return !!(key && state.examModeByMon && state.examModeByMon[key]);
    }

    function setExamModePreference(mon, enabled) {
      const key = normMonKey(mon || '');
      if (!key) return;
      if (!state.examModeByMon || typeof state.examModeByMon !== 'object') state.examModeByMon = {};
      if (enabled) state.examModeByMon[key] = true;
      else delete state.examModeByMon[key];
    }

    function isAutoExamMode() {
      const cfg = currentExamConfig();
      return hasValidExamConfig(cfg) && examModePreferenceForMon(state.currentMon);
    }

    function refreshExamModeToggle() {
      if (!els.useExamCodesCheckbox) return;
      const mon = normMonKey(state.currentMon || '');
      const allConfigs = mon ? examConfigsForMon(mon) : [];
      const availableConfigs = mon ? availableExamConfigs(mon) : [];
      const hasCfg = allConfigs.length > 0;
      const canUse = availableConfigs.length > 0;
      const accessBlocked = isGuestAccount() || isLimitedAccount();
      if (!canUse && mon) setExamModePreference(mon, false);
      els.useExamCodesCheckbox.checked = canUse && examModePreferenceForMon(mon);
      els.useExamCodesCheckbox.disabled = !canUse;
      const modeTitle = !mon
        ? 'Chọn Lớp-Môn trước.'
        : (!hasCfg
          ? 'Lớp-Môn này chưa có đề trắc nghiệm hợp lệ.'
          : (!canUse
            ? 'Các đề của Lớp-Môn này đã quét hoàn thành hết.'
            : 'Mở bảng Chấm theo mã đề.'));
      els.useExamCodesCheckbox.title = modeTitle;
      if (els.examModeEnterBtn) {
        /* Khách/Limited vẫn bấm được để nhận đúng bảng Đăng nhập/Nâng cấp. */
        els.examModeEnterBtn.disabled = accessBlocked ? false : !canUse;
        els.examModeEnterBtn.title = accessBlocked
          ? (isGuestAccount() ? 'Bấm để đăng nhập và sử dụng Chấm theo mã đề.' : 'Bấm để xem hướng dẫn nâng cấp MVIP.')
          : modeTitle;
      }
      syncExamModeExpanded();
    }

    function recordExamNumber(item) {
      if (!isMultiCodeRecord(item)) return 0;
      const raw = parseInt(String((item && item.exam_no) || 0), 10);
      if (!Number.isNaN(raw) && raw > 0) return raw;
      return 1;
    }

    function currentExamSerial(mon = '') {
      const key = normMonKey(mon || state.currentMon || '');
      if (!key) return 0;
      return selectedExamNoForMon(key);
    }

    function syncExamModeExpanded() {
      const expand = !!(els.useExamCodesCheckbox && els.useExamCodesCheckbox.checked && !els.useExamCodesCheckbox.disabled);
      const workspace = document.querySelector('#bang-dieu-khien .workspace');
      if (workspace) workspace.classList.toggle('exam-mode-expanded', expand);
      document.body.classList.toggle('exam-mode-expanded', expand);
      if (els.currentBoardTitle) {
        els.currentBoardTitle.textContent = expand ? 'Chấm theo mã đề' : 'Bảng học sinh đang quét';
      }
      if (els.examModeExitBtn) els.examModeExitBtn.hidden = !expand;
      if (els.examModeEnterBtn) els.examModeEnterBtn.hidden = expand;
    }

    function refreshExamModeExtraControls() {
      if (!els.examModeExtra || !els.examSerialSelect || !els.examQuestionLabel) return;
      const mon = normMonKey(state.currentMon || '');
      const autoMode = isAutoExamMode();
      const available = mon ? availableExamConfigs(mon) : [];
      if (!autoMode || !available.length) {
        els.examModeExtra.hidden = true;
        els.examSerialSelect.disabled = true;
        els.examSerialSelect.innerHTML = '<option value="">Đề số</option>';
        els.examQuestionLabel.textContent = 'Câu 1';
        if (els.examDoneBtn) {
          els.examDoneBtn.disabled = true;
          els.examDoneBtn.title = 'Bấm nút "Chấm theo mã đề" để dùng nút Xem.';
        }
        if (els.finishAutoBtn) {
          els.finishAutoBtn.hidden = true;
          els.finishAutoBtn.disabled = true;
          els.finishAutoBtn.title = 'Bấm nút "Chấm theo mã đề" để dùng nút mũi tên sang phải.';
        }
        if (els.examRescanBtn) {
          els.examRescanBtn.hidden = true;
          els.examRescanBtn.disabled = true;
          els.examRescanBtn.title = 'Bấm nút "Chấm theo mã đề" để dùng nút Hủy/quét lại.';
        }
        if (els.hideExamCodesLabel) els.hideExamCodesLabel.hidden = true;
        if (els.hideExamCodesCheckbox) {
          els.hideExamCodesCheckbox.checked = !!state.hideExamCodeValues;
          els.hideExamCodesCheckbox.disabled = true;
          els.hideExamCodesCheckbox.title = 'Bấm nút "Chấm theo mã đề" để dùng tùy chọn Ẩn mã đề.';
        }
        if (els.examFontSizeWrap) els.examFontSizeWrap.hidden = true;
        if (els.examFontSizeSelect) {
          els.examFontSizeSelect.disabled = true;
          els.examFontSizeSelect.value = String(state.fontSize || 22);
          els.examFontSizeSelect.title = 'Bấm nút "Chấm theo mã đề" để đổi cỡ chữ.';
        }
        if (els.examColumnCountWrap) els.examColumnCountWrap.hidden = true;
        if (els.examColumnCountSelect) {
          els.examColumnCountSelect.disabled = true;
          els.examColumnCountSelect.value = String(state.examColumnCount || 5);
          els.examColumnCountSelect.title = 'Bấm nút "Chấm theo mã đề" để chọn số cột hiển thị.';
        }
        if (els.hideExamCodesLabel) els.hideExamCodesLabel.classList.add('disabled');
        return;
      }
      const selectedNo = selectedExamNoForMon(mon);
      els.examSerialSelect.innerHTML = available.map((cfg) => `<option value="${escapeHtml(String(cfg.examNo))}">${escapeHtml(examConfigLabel(cfg))}</option>`).join('');
      els.examSerialSelect.title = 'Đề số';
      els.examSerialSelect.value = String(selectedNo || available[0].examNo || '');
      els.examSerialSelect.disabled = false;
      const cfg = available.find((item) => item.examNo === selectedNo) || available[0];
      const qNo = cfg ? (completedQuestionCountForExam(mon, cfg.examNo) + 1) : 1;
      const inRange = !!(cfg && qNo <= cfg.questionCount);
      const currentScanLabel = scanQuestionLabelFromConfig(cfg, qNo);
      const answered = answeredStats().answered;
      els.examQuestionLabel.textContent = cfg
        ? (qNo > cfg.questionCount ? `Hết ${formatQuestionNumber(cfg.questionCount)}` : `Câu ${currentScanLabel}`)
        : 'Câu 1';
      updateAutoExamPreviewButton(answered, cfg, qNo, autoMode);
      if (els.finishAutoBtn) els.finishAutoBtn.hidden = false;
      if (els.examRescanBtn) {
        const canRescan = autoMode && inRange && (answered > 0 || state.examPreviewDone);
        els.examRescanBtn.hidden = false;
        els.examRescanBtn.disabled = !canRescan;
        if (!inRange) els.examRescanBtn.title = `Đã hết số câu cấu hình (${cfg ? cfg.questionCount : 0} câu).`;
        else if (!answered && !state.examPreviewDone) els.examRescanBtn.title = 'Chưa có kết quả quét của câu hiện tại để hủy.';
        else els.examRescanBtn.title = `Hủy kết quả quét của câu ${currentScanLabel} để quét lại từ đầu.`;
      }
      if (els.hideExamCodesLabel) {
        els.hideExamCodesLabel.hidden = false;
        els.hideExamCodesLabel.classList.remove('disabled');
      }
      if (els.hideExamCodesCheckbox) {
        els.hideExamCodesCheckbox.disabled = false;
        els.hideExamCodesCheckbox.checked = !!state.hideExamCodeValues;
        els.hideExamCodesCheckbox.title = 'Ẩn số mã đề ở cột M.Đề, vẫn giữ phần đúng/sai khi bấm Xem.';
      }
      if (els.examFontSizeWrap) els.examFontSizeWrap.hidden = false;
      if (els.examFontSizeSelect) {
        els.examFontSizeSelect.disabled = false;
        els.examFontSizeSelect.value = String(state.fontSize || 22);
        els.examFontSizeSelect.title = 'Chọn cỡ chữ hiển thị từ 16 đến 24.';
      }
      if (els.examColumnCountWrap) els.examColumnCountWrap.hidden = false;
      if (els.examColumnCountSelect) {
        els.examColumnCountSelect.disabled = false;
        const examCols = [4, 5, 6].includes(Number(state.examColumnCount)) ? Number(state.examColumnCount) : 5;
        state.examColumnCount = examCols;
        els.examColumnCountSelect.value = String(examCols);
        els.examColumnCountSelect.title = 'Chọn số cột hiển thị 4, 5 hoặc 6.';
      }
      els.examModeExtra.hidden = false;
    }

    function formatQuestionNumber(value, pad = false) {
      const raw = parseInt(String(value || 0), 10);
      if (Number.isNaN(raw) || raw < 1) return '-';
      return pad ? String(raw).padStart(2, '0') : String(raw);
    }

    function questionLabelFromConfig(cfg, qNo, code = '') {
      const idx = parseInt(String(qNo || 0), 10) - 1;
      if (idx < 0) return '-';
      const examCode = String(code || '').trim();
      const byCode = examCode && cfg && cfg.questionLabelsByCode && Array.isArray(cfg.questionLabelsByCode[examCode])
        ? cfg.questionLabelsByCode[examCode]
        : null;
      const labels = byCode || (cfg && Array.isArray(cfg.questionLabels) ? cfg.questionLabels : []);
      return String((labels && labels[idx]) || formatQuestionNumber(qNo)).trim();
    }

    function cleanScanQuestionLabel(value, fallback = '') {
      const text = String(value == null ? '' : value).trim()
        .replace(/^câu\s*/i, '')
        .replace(/\s+/g, '');
      return text || String(fallback || '').trim();
    }

    function looksLikeScanOrderLabels(labels) {
      if (!Array.isArray(labels) || !labels.length) return false;
      const first = cleanScanQuestionLabel(labels[0], '');
      // Nhận nhãn theo thứ tự của đề đã sinh: 1, 2, 3, 5a... hoặc 1a, 1b...
      // Nếu nhãn đầu là 5, 7d... thì đó thường là số câu gốc trong ngân hàng đề cũ, không dùng để hiển thị khi quét.
      return /^1[a-d]?$/i.test(first);
    }

    function scanQuestionLabelFromConfig(cfg, qNo, code = '') {
      const idx = parseInt(String(qNo || 0), 10) - 1;
      if (idx < 0) return '-';
      const fallback = formatQuestionNumber(qNo);
      const examCode = String(code || '').trim();
      const byCode = examCode && cfg && cfg.questionLabelsByCode && Array.isArray(cfg.questionLabelsByCode[examCode])
        ? cfg.questionLabelsByCode[examCode]
        : null;
      if (byCode && looksLikeScanOrderLabels(byCode)) {
        return cleanScanQuestionLabel(byCode[idx], fallback);
      }
      const labels = cfg && Array.isArray(cfg.questionLabels) ? cfg.questionLabels : [];
      if (looksLikeScanOrderLabels(labels)) {
        return cleanScanQuestionLabel(labels[idx], fallback);
      }
      return fallback;
    }

    function scanQuestionLabelForStudentFromConfig(cfg, so, qNo) {
      return scanQuestionLabelFromConfig(cfg, qNo, studentCodeForConfig(cfg, so));
    }

    function formatQuestionLabelForRecord(item, fallbackIndex = 0) {
      const qValue = (item && item._reportQuestionNo)
        ? item._reportQuestionNo
        : ((item && item.q) ? item.q : (fallbackIndex + 1));
      if (isMultiCodeRecord(item)) {
        const examNo = recordExamNumber(item);
        const cfg = examConfigsForMon(state.currentMon).find((entry) => entry.examNo === examNo);
        const savedLabel = cleanScanQuestionLabel(item && item.q_label, '');
        const label = savedLabel || scanQuestionLabelFromConfig(cfg, qValue);
        return `Đề ${examNo} - Câu ${label}`;
      }
      return `Câu ${formatQuestionNumber(qValue)}`;
    }

    function currentQuestionNo(mode = null) {
      const mon = normMonKey(state.currentMon || '');
      if (!mon) return 1;
      const targetMode = mode || (isAutoExamMode() ? 'exam' : 'normal');
      if (targetMode === 'exam') {
        const examNo = currentExamSerial(mon);
        if (!examNo) return 1;
        return completedQuestionCountForExam(mon, examNo) + 1;
      }
      return historyListByDataset(mon, 'normal').length + 1;
    }

    function studentCodeForConfig(cfg, so) {
      return String((cfg && cfg.studentCodes && cfg.studentCodes[so]) || '').trim();
    }

    function expectedAnswerForStudentFromConfig(cfg, so, qNo) {
      const code = studentCodeForConfig(cfg, so);
      if (!code) return '';
      const arr = (cfg && cfg.answerKeys && cfg.answerKeys[code]) || [];
      const idx = Number(qNo) - 1;
      if (idx < 0 || idx >= arr.length) return '';
      return String(arr[idx] || '').trim().toUpperCase();
    }

    function valueByAliases(mapObj, so) {
      const key = resolveStudentKey(mapObj || {}, so) || so;
      return key ? mapObj[key] : undefined;
    }

    function expectedAnswerForRecord(item, so) {
      if (item && item.expected_by_student && typeof item.expected_by_student === 'object') {
        return String(valueByAliases(item.expected_by_student, so) || '').trim().toUpperCase();
      }
      if (item && item.code_by_student && item.code_correct_map && typeof item.code_by_student === 'object' && typeof item.code_correct_map === 'object') {
        const code = String(valueByAliases(item.code_by_student, so) || '').trim();
        return String((item.code_correct_map || {})[code] || '').trim().toUpperCase();
      }
      return String((item && item.correct) || '').trim().toUpperCase();
    }

    function codeForRecord(item, so) {
      if (item && item.code_by_student && typeof item.code_by_student === 'object') {
        return String(valueByAliases(item.code_by_student, so) || '').trim();
      }
      return '';
    }

    function rosterToText(students) {
      return Object.keys(students || {}).sort((a, b) => {
        const aa = /^\d+$/.test(a) ? parseInt(a, 10) : Number.MAX_SAFE_INTEGER;
        const bb = /^\d+$/.test(b) ? parseInt(b, 10) : Number.MAX_SAFE_INTEGER;
        if (aa !== bb) return aa - bb;
        return String(a).localeCompare(String(b), 'vi');
      }).map((so) => `${so}${students[so] || ''}`).join('\n');
    }

    function normalizeRosterNameForMatch(value) {
      const text = String(value == null ? '' : value).trim().replace(/\s+/g, ' ');
      const normalized = typeof text.normalize === 'function' ? text.normalize('NFC') : text;
      return normalized.toLocaleLowerCase('vi-VN');
    }

    function formatAutoStudentId(numberValue) {
      const n = Math.max(1, Math.floor(Number(numberValue) || 1));
      return n < 100 ? String(n).padStart(2, '0') : String(n);
    }

    function parseRosterText(textValue, existingStudents = {}) {
      const rows = [];
      const usedNumbers = new Set();
      const lines = String(textValue || '').replace(/\r/g, '').split('\n');

      lines.forEach((line, idx) => {
        const raw = String(line || '').trim();
        if (!raw) return;

        const codeMatch = raw.match(/^(\d+)(.*)$/);
        if (!codeMatch) {
          rows.push({ so: '', name: raw, lineNo: idx + 1 });
          return;
        }

        const so = normalizeStudentId(codeMatch[1]);
        const name = String(codeMatch[2] || '')
          .replace(/^\s*(?:[.)\-:]\s*)?/, '')
          .trim();
        if (!so || !name) {
          throw new Error(`Dòng ${idx + 1} có mã nhưng chưa có tên học sinh.`);
        }
        const numericCode = parseInt(so, 10);
        if (usedNumbers.has(numericCode)) {
          throw new Error(`Dòng ${idx + 1} bị trùng mã học sinh ${so}.`);
        }
        usedNumbers.add(numericCode);
        rows.push({ so, name, lineNo: idx + 1 });
      });

      // Khi sửa lớp, giữ lại mã cũ cho học sinh có cùng họ tên nếu mã đó chưa được dùng.
      const existingByName = new Map();
      Object.keys(existingStudents || {}).forEach((rawSo) => {
        const so = normalizeStudentId(rawSo);
        const nameKey = normalizeRosterNameForMatch(existingStudents[rawSo]);
        if (!so || !nameKey) return;
        const numericCode = parseInt(so, 10);
        if (Number.isNaN(numericCode)) return;
        if (!existingByName.has(nameKey)) existingByName.set(nameKey, new Map());
        const byNumber = existingByName.get(nameKey);
        if (!byNumber.has(numericCode)) byNumber.set(numericCode, { so, numericCode });
      });

      rows.forEach((row) => {
        if (row.so) return;
        const byNumber = existingByName.get(normalizeRosterNameForMatch(row.name));
        if (!byNumber) return;
        const available = Array.from(byNumber.values()).filter((item) => !usedNumbers.has(item.numericCode));
        if (available.length !== 1) return;
        row.so = available[0].so;
        usedNumbers.add(available[0].numericCode);
      });

      let nextAutoNumber = 1;
      rows.forEach((row) => {
        if (row.so) return;
        while (usedNumbers.has(nextAutoNumber)) nextAutoNumber += 1;
        row.so = formatAutoStudentId(nextAutoNumber);
        usedNumbers.add(nextAutoNumber);
        nextAutoNumber += 1;
      });

      const students = {};
      rows.forEach((row) => {
        students[row.so] = row.name;
      });
      return students;
    }


    function currentAddClassExistingStudents() {
      const editingKey = normMonKey(state.addClassEditingKey || '');
      return editingKey ? classDataStudents(editingKey) : {};
    }

    function setAddClassDroppedStudents(rawValue, studentsMap = {}) {
      const normalized = normalizeDroppedStudents(rawValue, studentsMap);
      state.addClassDroppedStudents = new Set(Object.keys(normalized));
    }

    function updateAddClassRosterSummary(studentCount = null) {
      const body = els.addClassRosterTableBody;
      const total = studentCount == null
        ? Math.max(0, parseInt(String((body && body.dataset.studentCount) || 0), 10) || 0)
        : Math.max(0, parseInt(String(studentCount || 0), 10) || 0);
      const droppedCount = state.addClassDroppedStudents instanceof Set ? state.addClassDroppedStudents.size : 0;
      if (els.addClassRosterSummary) {
        els.addClassRosterSummary.textContent = `${total} học sinh${droppedCount ? ` · ${droppedCount} bỏ học` : ''}`;
      }
      if (els.addClassRosterTableMessage) {
        els.addClassRosterTableMessage.className = `add-class-roster-message${droppedCount ? ' warn' : ''}`;
        els.addClassRosterTableMessage.textContent = total
          ? (droppedCount
            ? `${droppedCount} mã thẻ đã ngừng nhận kết quả quét mới. Bỏ tích để cho phép quét lại.`
            : 'Tích vào cột Bỏ học để mã thẻ đó không cập nhật kết quả quét mới.')
          : 'Dán danh sách học sinh để hệ thống tạo mã và hiển thị cột Bỏ học.';
      }
    }

    function renderAddClassRosterTable() {
      if (!els.addClassRosterTableBody) return;
      const textValue = (els.addClassRosterInput && els.addClassRosterInput.value) || '';
      let students = {};
      try {
        students = parseRosterText(textValue, currentAddClassExistingStudents());
      } catch (error) {
        els.addClassRosterTableBody.dataset.studentCount = '0';
        els.addClassRosterTableBody.innerHTML = `<div class="add-class-roster-grid-empty error">${escapeHtml(error.message || 'Danh sách học sinh chưa hợp lệ.')}</div>`;
        if (els.addClassRosterSummary) els.addClassRosterSummary.textContent = 'Danh sách chưa hợp lệ';
        if (els.addClassRosterTableMessage) {
          els.addClassRosterTableMessage.className = 'add-class-roster-message error';
          els.addClassRosterTableMessage.textContent = 'Bạn sửa dòng báo lỗi trước khi lưu.';
        }
        return;
      }

      setAddClassDroppedStudents(state.addClassDroppedStudents, students);
      const keys = sortedStudentKeysFromMap(students);
      els.addClassRosterTableBody.dataset.studentCount = String(keys.length);
      if (!keys.length) {
        els.addClassRosterTableBody.innerHTML = '<div class="add-class-roster-grid-empty">Dán danh sách học sinh để hiển thị tại đây.</div>';
        updateAddClassRosterSummary(0);
        return;
      }

      els.addClassRosterTableBody.innerHTML = keys.map((so) => {
        const name = String(students[so] || '').trim();
        const dropped = state.addClassDroppedStudents.has(so);
        return `<div class="add-class-roster-grid-row${dropped ? ' is-dropped' : ''}" data-add-class-student-row="${escapeHtml(so)}" role="row">
          <div class="add-class-roster-grid-id" role="cell">${escapeHtml(so)}</div>
          <div class="add-class-roster-grid-name" title="${escapeHtml(name)}" role="cell">${escapeHtml(name)}</div>
          <label class="add-class-roster-drop-cell" role="cell" title="${dropped ? 'Bỏ tích để nhận kết quả quét lại' : 'Tích để ngừng nhận kết quả quét'}">
            <input aria-label="Đánh dấu ${escapeHtml(name)} bỏ học" data-add-class-dropout-id="${escapeHtml(so)}" type="checkbox" ${dropped ? 'checked' : ''}/>
          </label>
        </div>`;
      }).join('');
      updateAddClassRosterSummary(keys.length);
    }

    function scheduleAddClassRosterTableRender() {
      if (state.addClassRosterRenderTimer) window.clearTimeout(state.addClassRosterRenderTimer);
      state.addClassRosterRenderTimer = window.setTimeout(() => {
        state.addClassRosterRenderTimer = null;
        renderAddClassRosterTable();
      }, 120);
    }

    function handleAddClassDropoutChange(event) {
      const input = event && event.target && event.target.closest
        ? event.target.closest('input[data-add-class-dropout-id]')
        : null;
      if (!input) return;
      const so = normalizeStudentId(input.getAttribute('data-add-class-dropout-id') || '');
      if (!so) return;
      if (!(state.addClassDroppedStudents instanceof Set)) state.addClassDroppedStudents = new Set();
      studentAliases(so).forEach((alias) => state.addClassDroppedStudents.delete(alias));
      if (input.checked) state.addClassDroppedStudents.add(so);
      const row = input.closest('[data-add-class-student-row]');
      if (row) row.classList.toggle('is-dropped', input.checked);
      updateAddClassRosterSummary();
    }

    const CLASS_SUBJECT_OPTIONS_BY_GRADE = {
      1: ['Tiếng Việt', 'Toán', 'Đạo đức', 'Tự nhiên và Xã hội', 'Giáo dục thể chất', 'Nghệ thuật', 'Âm nhạc', 'Mĩ thuật', 'Hoạt động trải nghiệm', 'Ngoại ngữ 1', 'Tiếng Anh', 'Tiếng dân tộc thiểu số', 'GDĐP'],
      2: ['Tiếng Việt', 'Toán', 'Đạo đức', 'Tự nhiên và Xã hội', 'Giáo dục thể chất', 'Nghệ thuật', 'Âm nhạc', 'Mĩ thuật', 'Hoạt động trải nghiệm', 'Ngoại ngữ 1', 'Tiếng Anh', 'Tiếng dân tộc thiểu số', 'GDĐP'],
      3: ['Tiếng Việt', 'Toán', 'Đạo đức', 'Tự nhiên và Xã hội', 'Giáo dục thể chất', 'Nghệ thuật', 'Âm nhạc', 'Mĩ thuật', 'Hoạt động trải nghiệm', 'Ngoại ngữ 1', 'Tiếng Anh', 'Tin học và Công nghệ', 'Tin học', 'Công nghệ', 'Tiếng dân tộc thiểu số', 'GDĐP'],
      4: ['Tiếng Việt', 'Toán', 'Đạo đức', 'Khoa học', 'Lịch sử và Địa lí', 'Giáo dục thể chất', 'Nghệ thuật', 'Âm nhạc', 'Mĩ thuật', 'Hoạt động trải nghiệm', 'Ngoại ngữ 1', 'Tiếng Anh', 'Tin học và Công nghệ', 'Tin học', 'Công nghệ', 'Tiếng dân tộc thiểu số', 'GDĐP'],
      5: ['Tiếng Việt', 'Toán', 'Đạo đức', 'Khoa học', 'Lịch sử và Địa lí', 'Giáo dục thể chất', 'Nghệ thuật', 'Âm nhạc', 'Mĩ thuật', 'Hoạt động trải nghiệm', 'Ngoại ngữ 1', 'Tiếng Anh', 'Tin học và Công nghệ', 'Tin học', 'Công nghệ', 'Tiếng dân tộc thiểu số', 'GDĐP'],
      6: ['Toán', 'Tin', 'Sử - Địa', 'Ngữ văn', 'Mĩ thuật', 'KHTN', 'HĐTN-HN', 'GDCD', 'Công nghệ', 'Âm nhạc', 'Anh', 'GDĐP', 'Môn khác'],
      7: ['Toán', 'Tin', 'Sử - Địa', 'Ngữ văn', 'Mĩ thuật', 'KHTN', 'HĐTN-HN', 'GDCD', 'Công nghệ', 'Âm nhạc', 'Anh', 'GDĐP', 'Môn khác'],
      8: ['Toán', 'Tin', 'Sử - Địa', 'Ngữ văn', 'Mĩ thuật', 'KHTN', 'HĐTN-HN', 'GDCD', 'Công nghệ', 'Âm nhạc', 'Anh', 'GDĐP', 'Môn khác'],
      9: ['Toán', 'Tin', 'Sử - Địa', 'Ngữ văn', 'Mĩ thuật', 'KHTN', 'HĐTN-HN', 'GDCD', 'Công nghệ', 'Âm nhạc', 'Anh', 'GDĐP', 'Môn khác'],
      10: ['Toán', 'Vật lí', 'Hóa', 'Sinh', 'Ngữ văn', 'Lịch sử', 'Mĩ thuật', 'HĐTN-HN', 'GDKT-PL', 'Địa lí', 'Công nghệ', 'Anh', 'Âm nhạc', 'GDĐP', 'Môn khác'],
      11: ['Toán', 'Vật lí', 'Hóa', 'Sinh', 'Ngữ văn', 'Lịch sử', 'Mĩ thuật', 'HĐTN-HN', 'GDKT-PL', 'Địa lí', 'Công nghệ', 'Anh', 'Âm nhạc', 'GDĐP', 'Môn khác'],
      12: ['Toán', 'Vật lí', 'Hóa', 'Sinh', 'Ngữ văn', 'Lịch sử', 'Mĩ thuật', 'HĐTN-HN', 'GDKT-PL', 'Địa lí', 'Công nghệ', 'Anh', 'Âm nhạc', 'GDĐP', 'Môn khác']
    };

    function addClassStatus(message = '', type = '') {
      if (!els.addClassStatus) return;
      els.addClassStatus.textContent = message || '';
      els.addClassStatus.className = `add-class-status${type ? ' ' + type : ''}`;
    }

    function parseClassSubjectNameForDialog(mon) {
      const key = normMonKey(mon || '');
      const fallback = { grade: '6', className: '', subject: '' };
      if (!key) return fallback;
      const parts = key.split('-').map((part) => normMonKey(part)).filter(Boolean);
      const parseClassPart = (part) => {
        const m = String(part || '').match(/^(\d{1,2})(.*)$/);
        if (!m) return null;
        const n = parseInt(m[1], 10);
        if (Number.isNaN(n) || n < 1 || n > 12) return null;
        return { grade: String(n), className: String(m[2] || '').trim() };
      };
      if (parts.length >= 2) {
        const lastClass = parseClassPart(parts[parts.length - 1]);
        if (lastClass) return { grade: lastClass.grade, className: lastClass.className, subject: parts.slice(0, -1).join('-') };
        const firstClass = parseClassPart(parts[0]);
        if (firstClass) return { grade: firstClass.grade, className: firstClass.className, subject: parts.slice(1).join('-') };
      }
      const anyClass = parseClassPart(key);
      if (anyClass) return { grade: anyClass.grade, className: anyClass.className, subject: '' };
      return fallback;
    }

    function guessGradeForAddClassDialog(skipParse = false) {
      const source = normMonKey((els.classManagerSelect && els.classManagerSelect.value) || state.managerMon || state.currentMon || '');
      if (!skipParse && source) {
        const parsed = parseClassSubjectNameForDialog(source);
        if (parsed && parsed.grade) return parsed.grade;
      }
      const m = source.match(/(^|-)\s*(\d{1,2})/);
      if (m) {
        const n = parseInt(m[2], 10);
        if (n >= 1 && n <= 12) return String(n);
      }
      return '6';
    }

    function composeClassSubjectKey(grade, subject, classNameInput) {
      const gradeText = String(grade || '').trim();
      const gradeNo = (gradeText.match(/\d{1,2}/) || [''])[0];
      const subjectKey = normMonKey(subject || '');
      let classPart = normMonKey(classNameInput || '').replace(/^lớp\s*/i, '').replace(/\s+/g, '');
      if (!gradeNo) throw new Error('Bạn chọn lớp trước khi lưu.');
      if (!subjectKey) throw new Error('Bạn chọn môn trước khi lưu.');
      if (!classPart) throw new Error('Bạn nhập tên lớp trước khi lưu.');
      if (!classPart.toLowerCase().startsWith(gradeNo.toLowerCase())) classPart = `${gradeNo}${classPart}`;
      return normMonKey(`${subjectKey}-${classPart}`);
    }

    function setAddClassDialogMode(mode, mon = '') {
      const editing = mode === 'edit';
      state.addClassEditingKey = editing ? normMonKey(mon || '') : '';
      if (els.addClassDialogTitle) els.addClassDialogTitle.textContent = editing ? 'Sửa lớp' : 'Thêm lớp';
    }

    function renderAddClassGradeOptions(selectedGrade = '') {
      if (!els.addClassGradeSelect) return;
      const grades = Object.keys(CLASS_SUBJECT_OPTIONS_BY_GRADE).sort((a, b) => parseInt(a, 10) - parseInt(b, 10));
      els.addClassGradeSelect.innerHTML = grades.map((grade) => `<option value="${escapeHtml(grade)}">Lớp ${escapeHtml(grade)}</option>`).join('');
      const wanted = String(selectedGrade || guessGradeForAddClassDialog() || '6');
      els.addClassGradeSelect.value = grades.includes(wanted) ? wanted : (grades[0] || '6');
      // A freshly opened dialog must not reuse another class's custom subject.
      if (els.addClassSubjectSelect) els.addClassSubjectSelect.value = '';
      if (els.addClassCustomSubjectInput) els.addClassCustomSubjectInput.value = '';
      renderAddClassSubjectOptions();
    }

    function syncAddClassCustomSubjectInput(focusInput = false) {
      const isOther = classSubjectKeysEquivalent(els.addClassSubjectSelect && els.addClassSubjectSelect.value, 'Môn khác');
      if (els.addClassCustomSubjectWrap) els.addClassCustomSubjectWrap.hidden = !isOther;
      const input = els.addClassCustomSubjectInput;
      if (input) {
        input.disabled = !isOther;
        input.required = isOther;
        if (isOther && focusInput) input.focus();
      }
    }

    function readAddClassSubject() {
      const selected = normMonKey((els.addClassSubjectSelect && els.addClassSubjectSelect.value) || '');
      if (!classSubjectKeysEquivalent(selected, 'Môn khác')) return selected;
      const input = els.addClassCustomSubjectInput;
      const subject = normMonKey((input && input.value) || '');
      if (!subject) {
        syncAddClassCustomSubjectInput(true);
        throw new Error('Bạn nhập tên môn học khi chọn Môn khác.');
      }
      return subject;
    }

    function renderAddClassSubjectOptions(preferSubject = '') {
      if (!els.addClassSubjectSelect) return;
      // Read the current choice before rebuilding the list when the grade changes.
      const requestedSubject = normMonKey(preferSubject || els.addClassSubjectSelect.value || '');
      // Keep previously saved full subject names selected after abbreviating the menus.
      const shortNames = {
        'giao duc dia phuong gddp': 'GDĐP',
        'hoat dong trai nghiem huong nghiep': 'HĐTN-HN',
        'giao duc kinh te va phap luat': 'GDKT-PL',
        'giao duc kinh te phap luat': 'GDKT-PL',
        'giao duc cong dan': 'GDCD',
        'khoa hoc tu nhien': 'KHTN'
      };
      const wanted = shortNames[normalizeRegularTestBankText(requestedSubject)] || requestedSubject;
      const grade = String((els.addClassGradeSelect && els.addClassGradeSelect.value) || guessGradeForAddClassDialog() || '6');
      const subjects = [...(CLASS_SUBJECT_OPTIONS_BY_GRADE[grade] || [])];
      if (!subjects.some((subject) => classSubjectKeysEquivalent(subject, 'Môn khác'))) subjects.push('Môn khác');
      els.addClassSubjectSelect.innerHTML = subjects
        .map((subject) => `<option value="${escapeHtml(subject)}">${escapeHtml(subject)}</option>`).join('');
      if (wanted) {
        const match = Array.from(els.addClassSubjectSelect.options || [])
          .find((option) => classSubjectKeysEquivalent(option.value, wanted));
        els.addClassSubjectSelect.value = match ? match.value : 'Môn khác';
        if (!match && els.addClassCustomSubjectInput) els.addClassCustomSubjectInput.value = wanted;
      }
      syncAddClassCustomSubjectInput();
    }

    function openAddClassDialog() {
      setAddClassDialogMode('add');
      renderAddClassGradeOptions();
      if (els.addClassNameInput) els.addClassNameInput.value = '';
      if (els.addClassRosterInput) els.addClassRosterInput.value = '';
      setAddClassDroppedStudents([], {});
      renderAddClassRosterTable();
      addClassStatus('');
      if (els.addClassDialog) els.addClassDialog.hidden = false;
      window.setTimeout(() => {
        try { if (els.addClassNameInput) els.addClassNameInput.focus(); } catch (_) {}
      }, 0);
    }

    function openEditClassDialog(mon) {
      const key = normMonKey(mon || '');
      if (!key || !state.classData || !state.classData[key]) {
        classManagerStatus('Không tìm thấy lớp cần sửa.', 'err');
        return;
      }
      setAddClassDialogMode('edit', key);
      const parsed = parseClassSubjectNameForDialog(key);
      renderAddClassGradeOptions(parsed.grade || guessGradeForAddClassDialog());
      if (els.addClassNameInput) els.addClassNameInput.value = parsed.className || '';
      renderAddClassSubjectOptions(parsed.subject || '');
      const students = classDataStudents(key);
      if (els.addClassRosterInput) els.addClassRosterInput.value = rosterToText(students);
      setAddClassDroppedStudents(classDataDroppedStudents(key), students);
      renderAddClassRosterTable();
      addClassStatus('');
      if (els.addClassDialog) els.addClassDialog.hidden = false;
      window.setTimeout(() => {
        try { if (els.addClassNameInput) els.addClassNameInput.focus(); } catch (_) {}
      }, 0);
    }

    function closeAddClassDialog() {
      if (els.addClassDialog) els.addClassDialog.hidden = true;
      if (state.addClassRosterRenderTimer) window.clearTimeout(state.addClassRosterRenderTimer);
      state.addClassRosterRenderTimer = null;
      state.addClassEditingKey = '';
      setAddClassDroppedStudents([], {});
      addClassStatus('');
      setAddClassDialogMode('add');
    }

    function moveMatchingKeyInObject(obj, oldKey, newKey) {
      const source = normMonKey(oldKey || '');
      const target = normMonKey(newKey || '');
      if (!source || !target || !obj || typeof obj !== 'object' || classSubjectKeysEquivalent(source, target)) return [];
      const moved = [];
      Object.keys(obj).forEach((itemKey) => {
        if (!classSubjectKeysEquivalent(itemKey, source)) return;
        const value = obj[itemKey];
        delete obj[itemKey];
        obj[target] = value;
        moved.push(itemKey);
      });
      return moved;
    }

    function renameClassSubjectEverywhere(oldKey, newKey) {
      const source = normMonKey(oldKey || '');
      const target = normMonKey(newKey || '');
      if (!source || !target || classSubjectKeysEquivalent(source, target)) return;
      moveMatchingKeyInObject(state.scanHistory, source, target);
      moveMatchingKeyInObject(state.examModeByMon, source, target);
      moveMatchingKeyInObject(state.selectedExamNoByMon, source, target);
      state.managerExamMons = (state.managerExamMons || []).map((item) => classSubjectKeysEquivalent(item, source) ? target : item);
      if (classSubjectKeysEquivalent(state.currentMon, source)) state.currentMon = target;
      if (classSubjectKeysEquivalent(state.managerMon, source)) state.managerMon = target;
      if (state.currentReportPayload && classSubjectKeysEquivalent(state.currentReportPayload.mon, source)) state.currentReportPayload.mon = target;
    }

    async function saveAddClassDialog() {
      const actionButton = els.addClassSaveBtn;
      const oldText = actionButton ? actionButton.textContent : '';
      try {
        const grade = String((els.addClassGradeSelect && els.addClassGradeSelect.value) || '').trim();
        const subject = readAddClassSubject();
        const className = normMonKey((els.addClassNameInput && els.addClassNameInput.value) || '');
        const name = composeClassSubjectKey(grade, subject, className);
        const editingKey = normMonKey(state.addClassEditingKey || '');
        const isEditing = !!(editingKey && state.classData && state.classData[editingKey]);
        const isRename = !!(isEditing && !classSubjectKeysEquivalent(editingKey, name));
        if (isRename && state.classData[name]) throw new Error(`Lớp "${name}" đã tồn tại. Bạn chọn tên lớp khác.`);
        if (!isEditing && state.classData && state.classData[name]) {
          throw new Error(`Lớp "${name}" đã tồn tại. Bạn bấm Sửa ở danh sách lớp nếu muốn chỉnh lại.`);
        }
        if (actionButton && actionButton.dataset.busy === '1') return;
        if (actionButton) {
          actionButton.dataset.busy = '1';
          actionButton.disabled = true;
          actionButton.textContent = 'Đang lưu...';
        }
        const previousStudents = isEditing ? classDataStudents(editingKey) : {};
        const students = parseRosterText((els.addClassRosterInput && els.addClassRosterInput.value) || '', previousStudents);
        const droppedStudents = normalizeDroppedStudents(state.addClassDroppedStudents, students);
        if (els.addClassRosterInput) els.addClassRosterInput.value = rosterToText(students);
        if (!state.classData || typeof state.classData !== 'object') state.classData = {};
        if (isEditing) {
          const oldEntry = ensureClassEntry(editingKey);
          if (isRename) {
            state.classData[name] = oldEntry;
            deleteMatchingKeysFromObject(state.classData, editingKey);
            renameClassSubjectEverywhere(editingKey, name);
          }
        } else {
          clearSavedResultsForClassSubject(name);
        }
        const entry = ensureClassEntry(name);
        entry.students = students;
        entry.droppedStudents = droppedStudents;
        syncExamConfigsForEntry(entry, students);
        state.managerMon = name;
        state.currentMon = name;
        state.managerExamMons = [name];
        state.managerExamEditNo = 0;
        if (isEditing && isRename) {
          await pushAllPersistentDataToServerAndRefresh(`Đã đổi và lưu lớp: ${name}`);
        } else if (isEditing) {
          await pushClassDataToServerAndRefresh(`Đã cập nhật lớp: ${name}`);
        } else {
          await pushAllPersistentDataToServerAndRefresh(`Đã thêm lớp: ${name}`);
        }
        renderClassManagerSelect();
        refreshClassManagerEditors(name, false);
        renderExamConfigEditor(state.managerExamMons);
        closeAddClassDialog();
        classManagerStatus(isEditing ? `Đã cập nhật lớp: ${name}` : `Đã thêm lớp: ${name}`, 'ok');
      } catch (error) {
        addClassStatus(error.message || 'Không thể lưu lớp.', 'err');
      } finally {
        if (actionButton) {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText || 'Lưu';
        }
      }
    }

    const CV7991_TOAN6_LESSONS = [
      ['Chương I. Số tự nhiên', 'Bài 1. Tập hợp', 'set'],
      ['Chương I. Số tự nhiên', 'Bài 2. Tập hợp các số tự nhiên', 'natural'],
      ['Chương I. Số tự nhiên', 'Bài 3. Phép cộng, phép trừ các số tự nhiên', 'natural_op'],
      ['Chương I. Số tự nhiên', 'Bài 4. Phép nhân, phép chia các số tự nhiên', 'natural_op'],
      ['Chương I. Số tự nhiên', 'Bài 5. Phép tính lũy thừa với số mũ tự nhiên', 'power'],
      ['Chương I. Số tự nhiên', 'Bài 6. Thứ tự thực hiện các phép tính', 'order_op'],
      ['Chương I. Số tự nhiên', 'Bài 7. Quan hệ chia hết. Tính chất chia hết', 'divisibility'],
      ['Chương I. Số tự nhiên', 'Bài 8. Dấu hiệu chia hết cho 2, cho 5', 'divisibility'],
      ['Chương I. Số tự nhiên', 'Bài 9. Dấu hiệu chia hết cho 3, cho 9', 'divisibility'],
      ['Chương I. Số tự nhiên', 'Bài 10. Số nguyên tố. Hợp số', 'prime'],
      ['Chương I. Số tự nhiên', 'Bài 11. Phân tích một số ra thừa số nguyên tố', 'prime'],
      ['Chương I. Số tự nhiên', 'Bài 12. Ước chung và ước chung lớn nhất', 'gcd_lcm'],
      ['Chương I. Số tự nhiên', 'Bài 13. Bội chung và bội chung nhỏ nhất', 'gcd_lcm'],
      ['Chương II. Số nguyên', 'Bài 1. Số nguyên âm', 'integer'],
      ['Chương II. Số nguyên', 'Bài 2. Tập hợp các số nguyên', 'integer'],
      ['Chương II. Số nguyên', 'Bài 3. Phép cộng các số nguyên', 'integer_op'],
      ['Chương II. Số nguyên', 'Bài 4. Phép trừ số nguyên. Quy tắc dấu ngoặc', 'integer_op'],
      ['Chương II. Số nguyên', 'Bài 5. Phép nhân các số nguyên', 'integer_op'],
      ['Chương II. Số nguyên', 'Bài 6. Phép chia hết hai số nguyên. Quan hệ chia hết trong tập hợp số nguyên', 'integer_op'],
      ['Chương III. Hình học trực quan', 'Bài 1. Tam giác đều. Hình vuông. Lục giác đều', 'visual_geometry'],
      ['Chương III. Hình học trực quan', 'Bài 2. Hình chữ nhật. Hình thoi', 'visual_geometry'],
      ['Chương III. Hình học trực quan', 'Bài 3. Hình bình hành', 'visual_geometry'],
      ['Chương III. Hình học trực quan', 'Bài 4. Hình thang cân', 'visual_geometry'],
      ['Chương III. Hình học trực quan', 'Bài 5. Hình có trục đối xứng', 'symmetry'],
      ['Chương III. Hình học trực quan', 'Bài 6. Hình có tâm đối xứng', 'symmetry'],
      ['Chương III. Hình học trực quan', 'Bài 7. Đối xứng trong thực tiễn', 'symmetry'],
      ['Chương IV. Một số yếu tố thống kê và xác suất', 'Bài 1. Thu thập, tổ chức, biểu diễn dữ liệu', 'statistics'],
      ['Chương IV. Một số yếu tố thống kê và xác suất', 'Bài 2. Biểu đồ cột kép', 'statistics'],
      ['Chương IV. Một số yếu tố thống kê và xác suất', 'Bài 3. Mô hình xác suất trong một số trò chơi và thí nghiệm đơn giản', 'probability'],
      ['Chương IV. Một số yếu tố thống kê và xác suất', 'Bài 4. Xác suất thực nghiệm trong một số trò chơi và thí nghiệm đơn giản', 'probability'],
      ['Chương V. Phân số và số thập phân', 'Bài 1. Phân số với tử và mẫu là số nguyên', 'fraction'],
      ['Chương V. Phân số và số thập phân', 'Bài 2. So sánh các phân số. Hỗn số dương', 'fraction'],
      ['Chương V. Phân số và số thập phân', 'Bài 3. Phép cộng, phép trừ phân số', 'fraction_op'],
      ['Chương V. Phân số và số thập phân', 'Bài 4. Phép nhân, phép chia phân số', 'fraction_op'],
      ['Chương V. Phân số và số thập phân', 'Bài 5. Số thập phân', 'decimal'],
      ['Chương V. Phân số và số thập phân', 'Bài 6. Phép cộng, phép trừ số thập phân', 'decimal_op'],
      ['Chương V. Phân số và số thập phân', 'Bài 7. Phép nhân, phép chia số thập phân', 'decimal_op'],
      ['Chương V. Phân số và số thập phân', 'Bài 8. Ước lượng và làm tròn số', 'rounding'],
      ['Chương V. Phân số và số thập phân', 'Bài 9. Tỉ số. Tỉ số phần trăm', 'percent'],
      ['Chương V. Phân số và số thập phân', 'Bài 10. Hai bài toán về phân số', 'percent'],
      ['Chương VI. Hình học phẳng', 'Bài 1. Điểm. Đường thẳng', 'plane_geometry'],
      ['Chương VI. Hình học phẳng', 'Bài 2. Hai đường thẳng cắt nhau. Hai đường thẳng song song', 'plane_geometry'],
      ['Chương VI. Hình học phẳng', 'Bài 3. Đoạn thẳng', 'segment'],
      ['Chương VI. Hình học phẳng', 'Bài 4. Tia', 'ray'],
      ['Chương VI. Hình học phẳng', 'Bài 5. Góc', 'angle'],
      ['Chương VI. Hình học phẳng', 'Bài 6. Số đo góc', 'angle'],
      ['Chương VI. Hình học phẳng', 'Bài 7. Tia phân giác của một góc', 'angle']
    ];

    const CV7991_LEVELS = ['b', 'h', 'v', 'vdc'];
    const CV7991_FORMATS = ['mc', 'tf', 'short', 'essay']; // Nhiều lựa chọn, Đúng - Sai, Trả lời ngắn, Tự luận
    const CV7991_MAX_PER_CELL = 40;
    const CV7991_EXAM_MAX_QUESTIONS = 40;
    const REGULAR_TEST_FORMATS = ['mc', 'tf'];
    const REGULAR_TEST_MAX_QUESTIONS = 40;
    const CV7991_OUTLINE_MAX_QUESTIONS = 200;
    let cv7991BankOptionCache = null;

    function renderCv7991Gui() {
      applyCv7991PanelMode();
      renderCv7991ClassChecklist();
      renderCv7991DeleteExamOptions();
      renderCv7991Matrix();
      renderCv7991Spec();
      recalcCv7991Matrix();
      updateCv7991ScoreSummary();
      updateCv7991ExamTitleDisplay();
    }

    function syncCv7991OutlineMatrixEditorMode() {
      const outlineMode = state.classManagerTab === 'outline';
      if (els.cv7991MatrixModal) els.cv7991MatrixModal.classList.toggle('cv7991-outline-matrix-mode', outlineMode);
      if (els.cv7991ScorePanel) els.cv7991ScorePanel.hidden = outlineMode;
      if (els.cv7991MatrixSaveBtn) els.cv7991MatrixSaveBtn.textContent = outlineMode ? 'Sinh đề cương' : 'Lưu';
      if (els.cv7991MatrixExitBtn) els.cv7991MatrixExitBtn.hidden = !outlineMode;
    }

    function applyCv7991PanelMode() {
      const outlineMode = state.classManagerTab === 'outline';
      if (els.cv7991Root) els.cv7991Root.classList.toggle('cv7991-outline-mode', outlineMode);
      if (els.cv7991PanelTitle) els.cv7991PanelTitle.textContent = outlineMode ? 'Soạn đề cương' : 'Soạn đề kiểm tra';
      if (els.cv7991PanelDesc) {
        els.cv7991PanelDesc.textContent = '';
        els.cv7991PanelDesc.hidden = true;
      }
      if (els.cv7991ClassStepTitle) els.cv7991ClassStepTitle.textContent = 'Bước 1. Chọn lớp-môn';
      if (els.cv7991ConfigStepTitle) els.cv7991ConfigStepTitle.textContent = outlineMode ? 'Bước 2. Cấu hình đề cương' : 'Bước 4. Cấu hình đề';
      if (els.cv7991OpenMatrixBtn) els.cv7991OpenMatrixBtn.textContent = outlineMode ? 'Biên soạn' : 'Biên soạn ma trận';
      if (els.cv7991OutlineGenerateStepTitle) els.cv7991OutlineGenerateStepTitle.textContent = 'Bước 3. Sinh đề cương ôn tập';
      syncCv7991OutlineMatrixEditorMode();
      // Soạn đề cương luôn sử dụng ngân hàng đề của MVIP, bất kể trước đó
      // người dùng đang chọn nguồn Word hay đã nạp một ngân hàng Word.
      if (outlineMode) {
        selectCv7991BankSource('mvip');
      }
    }

    function cv7991ClassGroupForKey(mon) {
      const key = normMonKey(mon || '');
      const parsed = parseClassSubjectNameForDialog(key);
      const subject = normMonKey(parsed && parsed.subject || '');
      const grade = String(parsed && parsed.grade || '').trim();
      if (!subject || !grade) return null;
      return { subject, grade, parsed };
    }

    function cv7991SubjectsEquivalent(a, b) {
      const aa = regularTestSubjectAliases(a || '');
      const bb = regularTestSubjectAliases(b || '');
      if (!aa.length || !bb.length) return normalizeRegularTestBankText(a) === normalizeRegularTestBankText(b);
      return aa.some((alias) => bb.includes(alias));
    }

    function cv7991ClassMatchesGroup(mon, group) {
      if (!group) return true;
      const current = cv7991ClassGroupForKey(mon);
      return !!(current && current.grade === group.grade && cv7991SubjectsEquivalent(current.subject, group.subject));
    }

    function normalizeCv7991SelectedMons(mons) {
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean);
      const seen = new Set();
      const valid = (Array.isArray(mons) ? mons : []).map(normMonKey).filter((key) => key && keys.includes(key) && !seen.has(key) && seen.add(key));
      const firstGroup = valid.length ? cv7991ClassGroupForKey(valid[0]) : null;
      return firstGroup ? valid.filter((key) => cv7991ClassMatchesGroup(key, firstGroup)) : valid;
    }

    function cv7991GetBankOptionCache() {
      if (!cv7991BankOptionCache) {
        const source = els.cv7991QuestionBankSelect;
        cv7991BankOptionCache = Array.from(source ? source.options || [] : []).map((option) => ({
          value: String(option.value || '').trim(),
          text: String(option.textContent || '').trim() || String(option.value || '').trim(),
          folder: String(option.dataset && option.dataset.bankFolder || '').trim(),
          legacyUrl: String(option.dataset && option.dataset.legacyUrl || '').trim(),
          listEndpoint: String(option.dataset && option.dataset.listEndpoint || '').trim(),
        })).filter((option) => option.value);
      }
      return cv7991BankOptionCache.slice();
    }

    function cv7991BankOptionHtml(option) {
      const attrs = [
        option && option.folder ? ` data-bank-folder="${escapeHtml(option.folder)}"` : '',
        option && option.legacyUrl ? ` data-legacy-url="${escapeHtml(option.legacyUrl)}"` : '',
        option && option.listEndpoint ? ` data-list-endpoint="${escapeHtml(option.listEndpoint)}"` : '',
      ].join('');
      return `<option value="${escapeHtml(option.value)}"${attrs}>${escapeHtml(option.text)}</option>`;
    }

    function cv7991PseudoBankOption(option) {
      return {
        value: option.value,
        textContent: option.text,
        dataset: {
          bankFolder: option.folder || '',
          legacyUrl: option.legacyUrl || '',
          listEndpoint: option.listEndpoint || '',
        }
      };
    }

    function cv7991SelectedBankParsedFromMons(mons) {
      const normalized = normalizeCv7991SelectedMons(mons || []);
      const first = normalized[0] || '';
      return first ? parseClassSubjectNameForDialog(first) : null;
    }

    function updateCv7991BankSelectForSelection(mons) {
      if (!els.cv7991QuestionBankSelect) return;
      const allOptions = cv7991GetBankOptionCache();
      const parsed = cv7991SelectedBankParsedFromMons(mons || Array.from(state.cv7991SelectedMons || []));
      const filtered = (parsed && parsed.subject && parsed.grade)
        ? allOptions.filter((option) => regularTestBankOptionMatchesParsed(cv7991PseudoBankOption(option), parsed))
        : allOptions;
      const oldValue = String(els.cv7991QuestionBankSelect.value || '');
      if (filtered.length) {
        els.cv7991QuestionBankSelect.innerHTML = filtered.map(cv7991BankOptionHtml).join('');
        const next = filtered.find((option) => option.value === oldValue) || filtered[0];
        els.cv7991QuestionBankSelect.value = next.value;
        els.cv7991QuestionBankSelect.disabled = false;
        if (els.cv7991LoadBankBtn) {
          els.cv7991LoadBankBtn.disabled = false;
          els.cv7991LoadBankBtn.setAttribute('aria-disabled', 'false');
        }
        if ((state.cv7991Bank && state.cv7991Bank.url && String(state.cv7991Bank.url || '') !== String(next.value || ''))
          || (state.cv7991BankCatalog && String(state.cv7991BankCatalog.url || '') !== String(next.value || ''))) {
          state.cv7991Bank = null;
          state.cv7991BankCatalog = null;
          state.cv7991BankCatalogPromise = null;
          state.cv7991BankLoadPromise = null;
          setCv7991BankStatus('Chưa tải danh mục ngân hàng câu hỏi.', '');
        }
      } else {
        const label = parsed && parsed.subject && parsed.grade ? `${parsed.subject} ${parsed.grade}` : 'lớp-môn đang chọn';
        els.cv7991QuestionBankSelect.innerHTML = `<option value="">Chưa có ngân hàng đề của Mvip cho ${escapeHtml(label)}</option>`;
        els.cv7991QuestionBankSelect.disabled = true;
        if (els.cv7991LoadBankBtn) {
          els.cv7991LoadBankBtn.disabled = true;
          els.cv7991LoadBankBtn.setAttribute('aria-disabled', 'true');
        }
        if ((state.cv7991Bank && state.cv7991Bank.url) || state.cv7991BankCatalog) {
          state.cv7991Bank = null;
          state.cv7991BankCatalog = null;
          state.cv7991BankCatalogPromise = null;
          state.cv7991BankLoadPromise = null;
          setCv7991BankStatus('Chưa tải danh mục ngân hàng câu hỏi.', '');
        }
      }
    }

    function renderCv7991ClassChecklist() {
      if (!els.cv7991ClassChecklist) return;
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const rawSelected = state.cv7991SelectedMons instanceof Set ? Array.from(state.cv7991SelectedMons) : (state.currentMon ? [state.currentMon] : []);
      const selectedList = normalizeCv7991SelectedMons(rawSelected);
      const selected = new Set(selectedList);
      state.cv7991SelectedMons = selected;
      const activeGroup = selectedList.length ? cv7991ClassGroupForKey(selectedList[0]) : null;
      els.cv7991ClassChecklist.innerHTML = keys.length
        ? keys.map((key) => {
          const disabled = !!(activeGroup && !cv7991ClassMatchesGroup(key, activeGroup));
          return `
          <label class="cv7991-class-item${disabled ? ' cv7991-class-disabled' : ''}" title="${escapeHtml(disabled ? 'Chỉ chọn được các lớp cùng môn, cùng khối với lớp đã chọn.' : key)}">
            <input class="cv7991-class-check" type="checkbox" value="${escapeHtml(key)}"${selected.has(key) ? ' checked' : ''}${disabled ? ' disabled' : ''}>
            <span>${escapeHtml(key)}</span>
          </label>`;
        }).join('')
        : '<div class="cv7991-class-empty">Chưa có lớp-môn.</div>';
      updateCv7991BankSelectForSelection(selectedList);
    }

    function selectedCv7991Mons() {
      if (!els.cv7991ClassChecklist) return [];
      const selected = Array.from(els.cv7991ClassChecklist.querySelectorAll('.cv7991-class-check:checked'))
        .map((input) => normMonKey(input.value || ''))
        .filter(Boolean);
      return normalizeCv7991SelectedMons(selected);
    }

    function handleCv7991ClassChecklistChange() {
      const selected = selectedCv7991Mons();
      state.cv7991SelectedMons = new Set(selected);
      renderCv7991ClassChecklist();
      renderCv7991DeleteExamOptions();
      updateCv7991DuplicateTitleHint();
    }

    function renderCv7991DeleteExamOptions() {
      if (!els.cv7991DeleteExamSelect) return;
      const mons = selectedCv7991Mons();
      const base = mons[0] || '';
      const configs = base ? editableExamConfigsForMon(base) : [];
      els.cv7991DeleteExamSelect.innerHTML = configs.length
        ? configs.map((cfg) => `<option value="${cfg.examNo}">${escapeHtml(examConfigLabel(cfg))}</option>`).join('')
        : '<option value="">Chưa có đề đã lưu chưa dùng</option>';
      if (els.cv7991DeleteExamBtn) els.cv7991DeleteExamBtn.disabled = !configs.length || !mons.length;
    }

    function cv7991ClassDisplayNameForTitle(mon) {
      return String(mon || '').replace(/\s*[-_–—]\s*/g, ' ').replace(/\s+/g, ' ').trim();
    }

    function cv7991ExistingExamTitlesForMon(mon) {
      const seen = new Set();
      return examConfigsForMon(mon).map((cfg) => examConfigLabel(cfg)).filter((title) => {
        const clean = String(title || '').trim();
        const key = normalizeExamConfigNameForCompare(clean);
        if (!clean || seen.has(key)) return false;
        seen.add(key);
        return true;
      });
    }

    function updateCv7991ExamTitleDisplay() {
      const title = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim();
      [els.cv7991ExamTitleDisplay, els.cv7991MatrixExamTitleDisplay].forEach((display) => {
        if (!display) return;
        display.textContent = title || 'Chưa chọn tên đề';
        display.classList.toggle('has-value', !!title);
      });
    }

    function renderCv7991ExamTitleDialogTable() {
      if (!els.cv7991ExamTitleTableWrap) return;
      const mons = selectedCv7991Mons();
      if (!mons.length) {
        els.cv7991ExamTitleTableWrap.innerHTML = '<div class="cv7991-action-note">Bạn chọn lớp-môn ở Bước 1 trước khi đặt tên đề.</div>';
        return;
      }
      const lists = mons.map((mon) => cv7991ExistingExamTitlesForMon(mon));
      const maxRows = Math.max(1, ...lists.map((list) => list.length));
      const rows = Array.from({ length: maxRows }).map((_, rowIndex) => {
        const cells = mons.map((mon, colIndex) => {
          const title = lists[colIndex][rowIndex] || '';
          return `<td>${title ? `<button class="cv7991-title-cell-btn" data-cv7991-title-pick="${escapeHtml(title)}" type="button">${escapeHtml(title)}</button>` : '<span class="cv7991-title-cell-empty">Chưa có tên đề</span>'}</td>`;
        }).join('');
        return `<tr>${cells}</tr>`;
      }).join('');
      els.cv7991ExamTitleTableWrap.innerHTML = `
        <table class="cv7991-title-table">
          <thead><tr>${mons.map((mon) => `<th>Tên đề đã có của ${escapeHtml(cv7991ClassDisplayNameForTitle(mon) || mon)}</th>`).join('')}</tr></thead>
          <tbody>${rows}</tbody>
        </table>`;
    }

    function openCv7991ExamTitleDialog() {
      const mons = selectedCv7991Mons();
      if (!mons.length) {
        openAlertModal('Bạn chọn lớp-môn ở Bước 1 trước khi đặt tên đề.', 'Thông báo');
        return;
      }
      if (!els.cv7991ExamTitleModal) return;
      renderCv7991ExamTitleDialogTable();
      if (els.cv7991ExamTitleModalInput) {
        els.cv7991ExamTitleModalInput.value = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim();
      }
      els.cv7991ExamTitleModal.hidden = false;
      setTimeout(() => {
        if (els.cv7991ExamTitleModalInput) els.cv7991ExamTitleModalInput.focus({ preventScroll: true });
      }, 0);
    }

    function closeCv7991ExamTitleDialog() {
      if (els.cv7991ExamTitleModal) els.cv7991ExamTitleModal.hidden = true;
    }

    function cv7991DuplicateExamTitleInfoForSelectedMons(title) {
      const cleanTitle = String(title || '').trim();
      const normalizedTitle = normalizeExamConfigNameForCompare(cleanTitle);
      if (!normalizedTitle) return null;
      const mons = selectedCv7991Mons();
      for (const mon of mons) {
        const existingTitles = cv7991ExistingExamTitlesForMon(mon);
        const duplicated = existingTitles.some((existingTitle) => normalizeExamConfigNameForCompare(existingTitle) === normalizedTitle);
        if (duplicated) {
          return {
            mon,
            displayName: cv7991ClassDisplayNameForTitle(mon) || mon,
            title: cleanTitle
          };
        }
      }
      return null;
    }

    function useCv7991ExamTitleFromDialog() {
      const title = String(els.cv7991ExamTitleModalInput && els.cv7991ExamTitleModalInput.value || '').trim();
      if (!title) {
        openAlertModal('Bạn nhập tên đề trước khi bấm "Dùng tên này".', 'Thông báo');
        return;
      }
      const duplicateInfo = cv7991DuplicateExamTitleInfoForSelectedMons(title);
      if (duplicateInfo) {
        openAlertModal(`${duplicateInfo.displayName} đã có tên đề này. Bạn hãy dùng tên đề khác`, 'Thông báo');
        if (els.cv7991ExamTitleModalInput) {
          els.cv7991ExamTitleModalInput.focus({ preventScroll: true });
          try { els.cv7991ExamTitleModalInput.select(); } catch (_) {}
        }
        return;
      }
      if (els.cv7991ExamTitleInput) {
        els.cv7991ExamTitleInput.value = title;
        updateCv7991DuplicateTitleHint();
        updateCv7991ExamTitleDisplay();
      }
      closeCv7991ExamTitleDialog();
    }

    function cv7991ReviewSubjectLabel() {
      const selected = selectedCv7991Mons();
      const first = selected[0] || '';
      const parsed = first ? parseClassSubjectNameForDialog(first) : null;
      const subject = String(parsed && parsed.subject || '').trim();
      const grade = String(parsed && parsed.grade || '').trim();
      if (subject && grade) return `${subject} ${grade}`;
      if (subject) return subject;
      if (first) return first;
      return 'đang chọn';
    }

    function cv7991ReviewOutlineTitle() {
      return `Đề cương ôn tập môn ${cv7991ReviewSubjectLabel()}`;
    }

    function cv7991ReviewBankTitle() {
      return `Ngân hàng câu hỏi ôn tập môn ${cv7991ReviewSubjectLabel()}`;
    }

    function cv7991ReviewSubjectLabelUpper() {
      return String(cv7991ReviewSubjectLabel() || '').toUpperCase();
    }

    function cv7991ReviewOutlineDocTitle() {
      return `ĐỀ CƯƠNG ÔN TẬP MÔN ${cv7991ReviewSubjectLabelUpper()}`;
    }

    function cv7991ReviewBankDocTitle() {
      return `NGÂN HÀNG CÂU HỎI ĐỀ CƯƠNG ÔN TẬP MÔN ${cv7991ReviewSubjectLabelUpper()}`;
    }

    function cv7991ReviewOutlineDocSubtitle() {
      return 'Bản này phát cho học sinh';
    }

    function cv7991ReviewBankDocSubtitle() {
      return 'Bạn hãy lưu giữ file này để làm ngân hàng câu hỏi khi ra đề trên hệ thống của Mvip';
    }

    function updateCv7991DuplicateTitleHint() {
      // Không hiển thị cảnh báo trùng tên ngay khi gõ tên đề ở Bước 2.
      // Việc kiểm tra trùng tên vẫn được giữ lại khi bấm nút Sinh đề.
    }

    function openCv7991Editor(kind) {
      const modal = kind === 'spec' ? els.cv7991SpecModal : els.cv7991MatrixModal;
      if (!modal) return;
      if (kind === 'spec') syncCv7991SpecFromMatrix();
      if (kind === 'matrix') syncCv7991OutlineMatrixEditorMode();
      modal.hidden = false;
      document.documentElement.classList.add('modal-open');
      const closeBtn = modal.querySelector('[data-cv7991-editor-close]');
      if (closeBtn) closeBtn.focus({ preventScroll: true });
    }

    function closeCv7991Editor(kind) {
      const modal = kind === 'spec' ? els.cv7991SpecModal : els.cv7991MatrixModal;
      if (!modal) return;
      modal.hidden = true;
      if (kind === 'matrix' && state.regularTestMatrixReturn) {
        const home = state.regularTestMatrixReturn;
        state.regularTestMatrixReturn = null;
        try {
          if (home.parent) {
            if (home.next && home.next.parentNode === home.parent) home.parent.insertBefore(modal, home.next);
            else home.parent.appendChild(modal);
          }
        } catch (_) {}
        if (els.regularTestModal) els.regularTestModal.hidden = false;
        document.documentElement.classList.add('modal-open');
        updateRegularTestGui();
        if (els.regularTestOpenMatrixBtn) els.regularTestOpenMatrixBtn.focus({ preventScroll: true });
        return;
      }
      if ((!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden) && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
      const returnBtn = kind === 'spec' ? els.cv7991OpenSpecBtn : els.cv7991OpenMatrixBtn;
      if (returnBtn) returnBtn.focus({ preventScroll: true });
    }

    function cv7991NormalizeRequirementKey(text) {
      return String(text || '')
        .replace(/^Bài\s*\d+\s*[\.\)]?\s*/i, '')
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd')
        .replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/[^a-z0-9]+/g, ' ')
        .trim();
    }

    const CV7991_HOA11_REQUIREMENTS = {
      'khai niem ve can bang hoa hoc': [
        'Trình bày được khái niệm phản ứng thuận nghịch và trạng thái cân bằng của một phản ứng thuận nghịch.',
        'Viết được biểu thức hằng số cân bằng KC của một phản ứng thuận nghịch.',
        'Thực hiện được thí nghiệm nghiên cứu ảnh hưởng của nhiệt độ tới chuyển dịch cân bằng.',
        'Vận dụng được nguyên lí chuyển dịch cân bằng Le Chatelier để giải thích ảnh hưởng của nhiệt độ, nồng độ, áp suất đến cân bằng hoá học.'
      ],
      'can bang trong dung dich nuoc': [
        'Nêu được khái niệm sự điện li, chất điện li, chất không điện li; nêu được khái niệm và ý nghĩa của pH trong thực tiễn.',
        'Trình bày được thuyết Bronsted - Lowry về acid - base; biết cách dùng chất chỉ thị để xác định môi trường acid, base, trung tính.',
        'Viết được biểu thức tính pH; nêu được nguyên tắc xác định nồng độ acid, base mạnh bằng phương pháp chuẩn độ.',
        'Thực hiện được thí nghiệm chuẩn độ acid - base và trình bày được ý nghĩa thực tiễn của cân bằng trong dung dịch nước.'
      ],
      'on tap chuong 1': [
        'Hệ thống được các khái niệm phản ứng thuận nghịch, cân bằng hoá học, sự điện li, acid - base và pH.',
        'Viết, giải thích được biểu thức hằng số cân bằng và biểu thức pH trong các tình huống quen thuộc.',
        'Vận dụng nguyên lí Le Chatelier, kiến thức pH và chuẩn độ để giải bài tập tổng hợp trong chương.',
        'Phân tích, liên hệ được các cân bằng hoá học và cân bằng trong dung dịch nước với hiện tượng thực tiễn.'
      ],
      'nitrogen': [
        'Phát biểu được trạng thái tự nhiên của nguyên tố nitrogen.',
        'Giải thích được tính trơ của đơn chất nitrogen ở nhiệt độ thường thông qua liên kết và năng lượng liên kết.',
        'Trình bày được sự hoạt động của nitrogen ở nhiệt độ cao đối với hydrogen, oxygen.',
        'Liên hệ được quá trình tạo nitrate cho đất từ nước mưa và giải thích được ứng dụng của nitrogen khí, lỏng trong thực tiễn.'
      ],
      'ammonia muoi ammonium': [
        'Mô tả được công thức Lewis và hình học của phân tử ammonia; trình bày được tính chất cơ bản của muối ammonium.',
        'Dựa vào cấu tạo phân tử ammonia để giải thích tính tan, tính base, tính khử và viết được phương trình hoá học minh hoạ.',
        'Vận dụng kiến thức cân bằng hoá học, tốc độ phản ứng, enthalpy cho phản ứng tổng hợp ammonia theo quá trình Haber.',
        'Nhận biết được ion ammonium trong dung dịch; trình bày được ứng dụng của ammonia, ammonium nitrate và một số muối ammonium.'
      ],
      'mot so hop chat cua nitrogen voi oxygen': [
        'Phân tích được nguồn gốc các oxide của nitrogen trong không khí.',
        'Nêu được cấu tạo của HNO3, tính acid và tính oxi hoá mạnh trong một số ứng dụng thực tiễn quan trọng của nitric acid.',
        'Giải thích được nguyên nhân gây hiện tượng mưa acid từ các oxide của nitrogen.',
        'Giải thích được nguyên nhân, hệ quả của hiện tượng phú dưỡng hoá và liên hệ với bảo vệ môi trường nước.'
      ],
      'sulfur va sulfur dioxide': [
        'Nêu được trạng thái tự nhiên của nguyên tố sulfur.',
        'Trình bày được cấu tạo, tính chất vật lí, tính chất hoá học cơ bản và ứng dụng của sulfur đơn chất, sulfur dioxide.',
        'Thực hiện hoặc mô tả được thí nghiệm chứng minh sulfur vừa có tính oxi hoá vừa có tính khử.',
        'Trình bày được sự hình thành, tác hại của sulfur dioxide và một số biện pháp làm giảm lượng sulfur dioxide thải vào không khí.'
      ],
      'sulfuric acid va muoi sulfate': [
        'Trình bày được tính chất vật lí, cách bảo quản, sử dụng sulfuric acid và nguyên tắc xử lí sơ bộ khi bỏng acid.',
        'Trình bày được cấu tạo, tính chất hoá học cơ bản, ứng dụng của sulfuric acid loãng, sulfuric acid đặc và một số muối sulfate.',
        'Thực hiện được thí nghiệm chứng minh tính oxi hoá mạnh, tính háo nước của sulfuric acid đặc; nhận biết được ion sulfate bằng ion Ba2+.',
        'Vận dụng kiến thức năng lượng phản ứng, chuyển dịch cân bằng và bảo vệ môi trường để giải thích quá trình sản xuất sulfuric acid theo phương pháp tiếp xúc.'
      ],
      'on tap chuong 2': [
        'Hệ thống được kiến thức về nitrogen, ammonia, muối ammonium, hợp chất oxygen của nitrogen, sulfur, sulfur dioxide, sulfuric acid và muối sulfate.',
        'Trình bày, so sánh được cấu tạo, tính chất và ứng dụng của các đơn chất, hợp chất nitrogen - sulfur đã học.',
        'Viết phương trình hoá học, nhận biết ion và giải bài tập tổng hợp về nitrogen - sulfur.',
        'Vận dụng kiến thức chương Nitrogen - Sulfur để giải thích vấn đề thực tiễn về phân bón, mưa acid, phú dưỡng hoá và ô nhiễm không khí.'
      ],
      'hop chat huu co va hoa hoc huu co': [
        'Nêu được khái niệm hợp chất hữu cơ, hoá học hữu cơ và đặc điểm chung của hợp chất hữu cơ.',
        'Phân loại được hợp chất hữu cơ thành hydrocarbon và dẫn xuất hydrocarbon; nêu được khái niệm nhóm chức.',
        'Sử dụng được bảng tín hiệu phổ hồng ngoại IR để xác định một số nhóm chức cơ bản.',
        'Vận dụng đặc điểm, nhóm chức và tín hiệu IR để nhận diện, phân loại hợp chất hữu cơ trong tình huống mới.'
      ],
      'phuong phap tach biet va tinh che hop chat huu co': [
        'Nêu được mục đích tách biệt và tinh chế hợp chất hữu cơ.',
        'Trình bày được nguyên tắc, cách tiến hành chưng cất, chiết, kết tinh và sơ lược về sắc kí cột.',
        'Thực hiện được thí nghiệm chưng cất thường, chiết.',
        'Vận dụng được phương pháp chưng cất, chiết, kết tinh để tách biệt và tinh chế một số hợp chất hữu cơ trong cuộc sống.'
      ],
      'cong thuc phan tu hop chat huu co': [
        'Nêu được khái niệm công thức phân tử hợp chất hữu cơ.',
        'Sử dụng được kết quả phổ khối lượng MS để xác định phân tử khối của hợp chất hữu cơ.',
        'Lập được công thức phân tử hợp chất hữu cơ từ dữ liệu phân tích nguyên tố và phân tử khối.',
        'Vận dụng phối hợp dữ liệu phần trăm khối lượng nguyên tố, phân tử khối và phổ MS để xác định công thức phân tử trong bài toán tổng hợp.'
      ],
      'cau tao hoa hoc hop chat huu co': [
        'Trình bày được nội dung thuyết cấu tạo hoá học; nêu được khái niệm chất đồng đẳng, dãy đồng đẳng.',
        'Giải thích được hiện tượng đồng phân trong hoá học hữu cơ.',
        'Viết được công thức cấu tạo đầy đủ, công thức cấu tạo thu gọn của một số hợp chất hữu cơ đơn giản.',
        'Xác định được chất đồng đẳng, chất đồng phân dựa vào công thức cấu tạo cụ thể của hợp chất hữu cơ.'
      ],
      'on tap chuong 3': [
        'Hệ thống được kiến thức về hợp chất hữu cơ, nhóm chức, phương pháp tách tinh chế, công thức phân tử và cấu tạo hoá học.',
        'Trình bày, phân loại và giải thích được đặc điểm chung, nhóm chức, đồng đẳng, đồng phân của hợp chất hữu cơ.',
        'Vận dụng dữ liệu phổ, phân tích nguyên tố và công thức cấu tạo để giải bài tập tổng hợp đại cương hoá học hữu cơ.',
        'Kết nối kiến thức về cấu tạo, nhóm chức và phương pháp tinh chế để xử lí tình huống nhận biết, tách và xác định hợp chất hữu cơ.'
      ],
      'alkane': [
        'Nêu được khái niệm alkane, nguồn alkane trong tự nhiên và công thức chung của alkane.',
        'Trình bày được quy tắc gọi tên, tính chất vật lí, đặc điểm liên kết, hình dạng phân tử methane, ethane và tính chất hoá học đặc trưng của alkane.',
        'Thực hiện được thí nghiệm với hexane; quan sát, mô tả hiện tượng và giải thích tính chất hoá học của alkane.',
        'Trình bày được ứng dụng, điều chế alkane trong công nghiệp và vận dụng để giải thích ô nhiễm không khí do khí thải phương tiện giao thông.'
      ],
      'hydrocarbon khong no': [
        'Nêu được khái niệm alkene, alkyne; công thức chung của alkene; đặc điểm liên kết, hình dạng phân tử ethylene và acetylene.',
        'Gọi tên được một số alkene, alkyne đơn giản; nêu được đồng phân hình học và tính chất vật lí của alkene, alkyne.',
        'Trình bày được tính chất hoá học của alkene, alkyne; thực hiện được thí nghiệm điều chế và thử tính chất của ethylene, acetylene.',
        'Vận dụng kiến thức về phản ứng cộng, trùng hợp, oxi hoá và điều chế để giải thích ứng dụng của alkene, acetylene trong thực tiễn.'
      ],
      'arene hydrocarbon thom': [
        'Nêu được khái niệm arene.',
        'Viết được công thức, gọi tên một số arene; trình bày được tính chất vật lí, trạng thái tự nhiên, liên kết và hình dạng phân tử benzene.',
        'Trình bày được tính chất hoá học đặc trưng của arene và mô tả được thí nghiệm minh hoạ.',
        'Trình bày được ứng dụng, điều chế arene trong công nghiệp và đề xuất cách ứng xử phù hợp khi sử dụng arene để bảo vệ sức khoẻ, môi trường.'
      ],
      'on tap chuong 4': [
        'Hệ thống được khái niệm, công thức chung, danh pháp và đặc điểm cấu tạo của alkane, hydrocarbon không no, arene.',
        'So sánh được tính chất vật lí, tính chất hoá học đặc trưng và phương pháp điều chế các loại hydrocarbon.',
        'Viết phương trình hoá học và giải bài tập nhận biết, điều chế, chuyển hoá hydrocarbon.',
        'Vận dụng kiến thức hydrocarbon để giải quyết bài toán tổng hợp và tình huống thực tiễn về nhiên liệu, vật liệu, môi trường.'
      ],
      'dan xuat halogen': [
        'Nêu được khái niệm dẫn xuất halogen.',
        'Viết công thức cấu tạo, gọi tên dẫn xuất halogen đơn giản; nêu được đặc điểm tính chất vật lí.',
        'Trình bày được tính chất hoá học cơ bản của dẫn xuất halogen và mô tả thí nghiệm thuỷ phân ethyl bromide hoặc ethyl chloride.',
        'Trình bày được ứng dụng, tác hại của CFC và đề xuất cách ứng xử phù hợp đối với việc lạm dụng dẫn xuất halogen trong đời sống, sản xuất.'
      ],
      'alcohol': [
        'Nêu được khái niệm alcohol, công thức tổng quát của alcohol no đơn chức mạch hở, bậc alcohol và đặc điểm phân tử methanol, ethanol.',
        'Viết công thức cấu tạo, gọi tên alcohol đơn giản; giải thích tính chất vật lí của alcohol dựa trên liên kết hydrogen.',
        'Trình bày được tính chất hoá học của alcohol; thực hiện được thí nghiệm đốt cháy ethanol, glycerol tác dụng với copper(II) hydroxide.',
        'Trình bày được ứng dụng, tác hại của việc lạm dụng rượu bia và phương pháp điều chế ethanol, glycerol.'
      ],
      'phenol': [
        'Nêu được khái niệm phenol, tên gọi, công thức cấu tạo một số phenol đơn giản và đặc điểm cấu tạo phân tử phenol.',
        'Nêu được tính chất vật lí của phenol.',
        'Trình bày được tính chất hoá học cơ bản của phenol và mô tả được các thí nghiệm minh hoạ.',
        'Trình bày được ứng dụng và phương pháp điều chế phenol từ cumene, từ nhựa than đá.'
      ],
      'on tap chuong 5': [
        'Hệ thống được khái niệm, danh pháp, cấu tạo của dẫn xuất halogen, alcohol, phenol.',
        'So sánh được tính chất vật lí, tính chất hoá học đặc trưng và ứng dụng của dẫn xuất halogen, alcohol, phenol.',
        'Viết phương trình hoá học và giải bài tập nhận biết, chuyển hoá, điều chế dẫn xuất halogen, alcohol, phenol.',
        'Vận dụng kiến thức chương Dẫn xuất halogen - Alcohol - Phenol để xử lí bài toán tổng hợp và tình huống thực tiễn về sức khoẻ, môi trường.'
      ],
      'hop chat carbonyl': [
        'Nêu được khái niệm hợp chất carbonyl gồm aldehyde và ketone.',
        'Gọi tên được một số hợp chất carbonyl đơn giản; mô tả đặc điểm liên kết nhóm carbonyl, hình dạng phân tử methanal, ethanal và tính chất vật lí.',
        'Trình bày được tính chất hoá học của aldehyde, ketone và thực hiện hoặc mô tả được thí nghiệm tráng bạc, phản ứng với Cu(OH)2/OH-, phản ứng tạo iodoform.',
        'Trình bày được ứng dụng, phương pháp điều chế acetaldehyde, acetone và xác định được hợp chất có chứa nhóm CH3CO- trong tình huống phù hợp.'
      ],
      'carboxylic acid': [
        'Nêu được khái niệm carboxylic acid.',
        'Viết công thức cấu tạo, gọi tên một số carboxylic acid; trình bày cấu tạo, hình dạng phân tử acetic acid và tính chất vật lí.',
        'Trình bày được tính chất hoá học cơ bản của carboxylic acid và thực hiện được thí nghiệm phản ứng của acetic acid hoặc citric acid.',
        'Trình bày được ứng dụng, phương pháp điều chế carboxylic acid và vận dụng phản ứng ester hoá, tính acid để giải thích hiện tượng thực tiễn.'
      ],
      'on tap chuong 6': [
        'Hệ thống được khái niệm, danh pháp, cấu tạo của hợp chất carbonyl và carboxylic acid.',
        'So sánh được tính chất vật lí, tính chất hoá học đặc trưng, ứng dụng và điều chế hợp chất carbonyl, carboxylic acid.',
        'Viết phương trình hoá học và giải bài tập nhận biết, chuyển hoá, điều chế hợp chất carbonyl, carboxylic acid.',
        'Vận dụng kiến thức chương Hợp chất carbonyl - Carboxylic acid để giải bài toán tổng hợp hữu cơ và tình huống thực tiễn.'
      ]
    };

    function cv7991RequirementsForLesson(unit, kind) {
      const name = String(unit || '').replace(/^Bài\s*\d+\.\s*/i, '');
      const hoa11Reqs = CV7991_HOA11_REQUIREMENTS[cv7991NormalizeRequirementKey(unit)];
      if (hoa11Reqs) return hoa11Reqs;
      const normalizedUnitKey = cv7991NormalizeRequirementKey(unit);
      if (/^tong hop(?: hop)? chuong\b/.test(normalizedUnitKey)) {
        const reviewUnitKey = normalizedUnitKey.replace(/^tong hop hop chuong\b/, 'tong hop chuong');
        const toan8Review = Object.values(CV7991_TOAN8_CHAPTER_REVIEWS || {}).find((review) => cv7991NormalizeRequirementKey(review && review.unit) === reviewUnitKey);
        if (toan8Review && toan8Review.requirements) {
          return [toan8Review.requirements.b, toan8Review.requirements.h, toan8Review.requirements.v, toan8Review.requirements.vdc];
        }
      }
      const templates = {
        set: ['Nhận biết được tập hợp, phần tử của tập hợp và cách dùng kí hiệu thuộc, không thuộc.', 'Mô tả được một tập hợp bằng cách liệt kê phần tử hoặc nêu dấu hiệu đặc trưng.', 'Vận dụng cách viết tập hợp để biểu diễn, phân loại đối tượng trong tình huống quen thuộc.'],
        natural: ['Nhận biết tập hợp số tự nhiên, thứ tự và cách biểu diễn số tự nhiên.', 'So sánh, sắp xếp được các số tự nhiên; đọc, viết số tự nhiên theo yêu cầu.', 'Vận dụng số tự nhiên để giải quyết tình huống đếm, so sánh, sắp xếp trong thực tế.'],
        natural_op: ['Nhận biết các thành phần, kết quả và tính chất cơ bản của phép tính với số tự nhiên.', 'Thực hiện được phép cộng, trừ, nhân, chia số tự nhiên; kiểm tra tính đúng sai của phép tính.', 'Vận dụng phép tính số tự nhiên để giải bài toán thực tiễn nhiều bước.'],
        power: ['Nhận biết lũy thừa với số mũ tự nhiên, cơ số, số mũ.', 'Tính được giá trị lũy thừa đơn giản và viết gọn tích các thừa số bằng nhau.', 'Vận dụng lũy thừa trong tính toán, so sánh và biểu diễn số lượng lớn.'],
        order_op: ['Nhận biết thứ tự thực hiện phép tính trong biểu thức.', 'Thực hiện đúng thứ tự các phép tính có ngoặc, lũy thừa, nhân chia, cộng trừ.', 'Vận dụng thứ tự thực hiện phép tính để tính hợp lí hoặc giải bài toán có biểu thức.'],
        divisibility: ['Nhận biết quan hệ chia hết và các dấu hiệu chia hết đã học.', 'Xác định được một số có chia hết cho 2, 3, 5, 9; giải thích bằng dấu hiệu chia hết.', 'Vận dụng tính chia hết để tìm chữ số chưa biết, phân loại số hoặc giải bài toán thực tiễn.'],
        prime: ['Nhận biết số nguyên tố, hợp số và thừa số nguyên tố.', 'Phân tích được một số tự nhiên ra thừa số nguyên tố trong trường hợp đơn giản.', 'Vận dụng phân tích thừa số nguyên tố để giải bài toán về ước, bội và chia hết.'],
        gcd_lcm: ['Nhận biết ước chung, ước chung lớn nhất, bội chung, bội chung nhỏ nhất.', 'Tìm được ƯCLN, BCNN của hai hoặc ba số tự nhiên trong trường hợp đơn giản.', 'Vận dụng ƯCLN, BCNN để giải bài toán chia nhóm, xếp hàng, chu kì trong thực tế.'],
        integer: ['Nhận biết số nguyên âm, số nguyên, số đối, giá trị tuyệt đối và thứ tự trên trục số.', 'So sánh, sắp xếp được các số nguyên; giải thích ý nghĩa số nguyên âm trong bối cảnh thực tế.', 'Vận dụng số nguyên để mô tả và giải quyết tình huống tăng giảm, nhiệt độ, độ cao, tiền nợ.'],
        integer_op: ['Nhận biết quy tắc cộng, trừ, nhân, chia hết trong tập hợp số nguyên.', 'Thực hiện được phép tính với số nguyên và quy tắc dấu ngoặc trong biểu thức đơn giản.', 'Vận dụng phép tính số nguyên để giải bài toán nhiều bước trong thực tế.'],
        visual_geometry: ['Nhận biết các hình phẳng trực quan và các yếu tố cạnh, góc, đường chéo tương ứng.', 'Mô tả được đặc điểm của hình; tính được chu vi, diện tích theo công thức đã học.', 'Vận dụng đặc điểm hình và công thức chu vi, diện tích để giải bài toán đo đạc, thiết kế, ghép hình.'],
        symmetry: ['Nhận biết hình có trục đối xứng, tâm đối xứng và các hình ảnh đối xứng trong thực tiễn.', 'Xác định được trục đối xứng, tâm đối xứng của một số hình đơn giản.', 'Vận dụng đối xứng để hoàn thiện hình, nhận xét mẫu trang trí hoặc giải quyết tình huống thực tế.'],
        statistics: ['Nhận biết dữ liệu, bảng dữ liệu và các dạng biểu diễn dữ liệu đã học.', 'Đọc, mô tả, so sánh được thông tin từ bảng thống kê, biểu đồ tranh, biểu đồ cột, biểu đồ cột kép.', 'Vận dụng việc thu thập, tổ chức, biểu diễn dữ liệu để rút ra nhận xét hoặc lựa chọn biểu đồ phù hợp.'],
        probability: ['Nhận biết kết quả có thể xảy ra, sự kiện và xác suất thực nghiệm trong trò chơi/thí nghiệm đơn giản.', 'Liệt kê được kết quả có thể xảy ra; tính, mô tả được xác suất thực nghiệm từ số liệu thu được.', 'Vận dụng mô hình xác suất hoặc xác suất thực nghiệm để dự đoán, nhận xét trong tình huống quen thuộc.'],
        fraction: ['Nhận biết phân số với tử và mẫu là số nguyên, phân số bằng nhau, hỗn số dương.', 'So sánh, rút gọn, biến đổi được phân số và hỗn số dương trong trường hợp đơn giản.', 'Vận dụng kiến thức phân số để biểu diễn, so sánh đại lượng và giải bài toán thực tế.'],
        fraction_op: ['Nhận biết quy tắc cộng, trừ, nhân, chia phân số; số đối, số nghịch đảo.', 'Thực hiện được các phép tính phân số và tính hợp lí trong biểu thức đơn giản.', 'Vận dụng phép tính phân số để giải bài toán thực tiễn nhiều bước.'],
        decimal: ['Nhận biết số thập phân, số đối của số thập phân và cách biểu diễn số thập phân.', 'So sánh, sắp xếp, chuyển đổi được số thập phân trong các trường hợp đơn giản.', 'Vận dụng số thập phân để mô tả, so sánh và tính toán trong tình huống đo lường, tiền tệ.'],
        decimal_op: ['Nhận biết quy tắc cộng, trừ, nhân, chia số thập phân.', 'Thực hiện được phép tính với số thập phân và kiểm tra kết quả tính toán.', 'Vận dụng phép tính số thập phân để giải bài toán thực tế về đo lường, chi phí, tỉ lệ.'],
        rounding: ['Nhận biết khái niệm ước lượng, làm tròn số và quy ước làm tròn.', 'Làm tròn được số theo hàng hoặc độ chính xác cho trước; ước lượng kết quả phép tính.', 'Vận dụng ước lượng và làm tròn số để kiểm tra, đánh giá tính hợp lí của kết quả trong thực tế.'],
        percent: ['Nhận biết tỉ số, tỉ số phần trăm và hai bài toán cơ bản về phân số.', 'Tính được tỉ số, tỉ số phần trăm; tìm giá trị phân số của một số hoặc tìm một số khi biết giá trị phân số của nó.', 'Vận dụng tỉ số, phần trăm và hai bài toán về phân số để giải bài toán thực tế nhiều bước.'],
        plane_geometry: ['Nhận biết điểm, đường thẳng, quan hệ thuộc, ba điểm thẳng hàng, hai đường thẳng cắt nhau, song song.', 'Vẽ, đọc tên và mô tả được điểm, đường thẳng, các quan hệ hình học cơ bản.', 'Vận dụng quan hệ điểm, đường thẳng để giải bài toán hình học phẳng đơn giản.'],
        segment: ['Nhận biết đoạn thẳng, độ dài đoạn thẳng, trung điểm của đoạn thẳng.', 'Đo, so sánh và tính được độ dài đoạn thẳng; xác định trung điểm trong trường hợp đơn giản.', 'Vận dụng hệ thức cộng đoạn thẳng và trung điểm để giải bài toán hình học.'],
        ray: ['Nhận biết tia, hai tia đối nhau, hai tia trùng nhau.', 'Vẽ và đọc tên được tia; xác định quan hệ giữa các tia trong hình vẽ.', 'Vận dụng kiến thức về tia để mô tả, phân tích cấu hình hình học đơn giản.'],
        angle: ['Nhận biết góc, đỉnh, cạnh của góc, số đo góc, các loại góc và tia phân giác.', 'Đo, vẽ, so sánh, tính được số đo góc trong trường hợp đơn giản.', 'Vận dụng quan hệ cộng góc, tia nằm giữa và tia phân giác để giải bài toán hình học phẳng.']
      };
      const fallback = [`Nhận biết các khái niệm, kí hiệu, quy tắc cơ bản trong nội dung ${name}.`, `Mô tả, giải thích và thực hiện được các yêu cầu trực tiếp của nội dung ${name}.`, `Vận dụng kiến thức ${name} để giải quyết bài toán quen thuộc hoặc tình huống thực tế.`];
      const base = templates[kind] || fallback;
      return [
        base[0],
        base[1],
        base[2],
        base[3] || `Vận dụng cao kiến thức ${name} để giải quyết bài toán mới, tổng hợp hoặc tình huống thực tế phức tạp hơn.`
      ];
    }

    const CV7991_TOAN8_CHAPTER_REVIEWS = {
      'da thuc': {
        unit: 'Tổng hợp chương I. Đa thức',
        requirements: {
          b: 'Nhận biết được các khái niệm về đơn thức, đa thức nhiều biến.',
          h: 'Tính được giá trị của đa thức khi biết giá trị của các biến; thực hiện được việc thu gọn đơn thức, đa thức.',
          v: 'Thực hiện được phép nhân đơn thức với đa thức và phép chia hết một đơn thức cho một đơn thức.',
          vdc: 'Thực hiện được các phép tính: phép cộng, phép trừ, phép nhân các đa thức nhiều biến trong những trường hợp đơn giản; thực hiện được phép chia hết một đa thức cho một đơn thức trong những trường hợp đơn giản.'
        }
      },
      'hang dang thuc dang nho va ung dung': {
        unit: 'Tổng hợp chương II. Hằng đẳng thức đáng nhớ',
        requirements: {
          b: 'Nhận biết được các khái niệm: đồng nhất thức, hằng đẳng thức.',
          h: 'Mô tả được các hằng đẳng thức: bình phương của tổng và hiệu; hiệu hai bình phương; lập phương của tổng và hiệu; tổng và hiệu hai lập phương.',
          v: 'Vận dụng được các hằng đẳng thức để phân tích đa thức thành nhân tử ở dạng vận dụng trực tiếp hằng đẳng thức.',
          vdc: 'Vận dụng được các hằng đẳng thức để phân tích đa thức thành nhân tử thông qua nhóm hạng tử và đặt nhân tử chung.'
        }
      },
      'tu giac': {
        unit: 'Tổng hợp chương III. Tứ giác',
        requirements: {
          b: 'Mô tả được tứ giác, tứ giác lồi.',
          h: 'Giải thích được định lí về tổng các góc trong một tứ giác lồi bằng 360°.',
          v: 'Giải thích được tính chất về góc kề một đáy, cạnh bên, đường chéo của hình thang cân; tính chất về cạnh đối, góc đối, đường chéo của hình bình hành; tính chất về hai đường chéo của hình chữ nhật, hình thoi, hình vuông.',
          vdc: 'Nhận biết được dấu hiệu để một hình thang là hình thang cân; một tứ giác là hình bình hành; một hình bình hành là hình chữ nhật hoặc hình thoi; một hình chữ nhật là hình vuông.'
        }
      },
      'dinh li thales': {
        unit: 'Tổng hợp chương IV. Định lí Thalès',
        requirements: {
          b: 'Mô tả được định nghĩa đường trung bình của tam giác.',
          h: 'Giải thích được định lí Thalès trong tam giác (định lí thuận và đảo); giải thích được tính chất đường trung bình của tam giác; giải thích được tính chất đường phân giác trong của tam giác.',
          v: 'Tính được độ dài đoạn thẳng bằng cách sử dụng định lí Thalès.',
          vdc: 'Giải quyết được một số vấn đề thực tiễn gắn với việc vận dụng định lí Thalès.'
        }
      },
      'du lieu va bieu do': {
        unit: 'Tổng hợp chương V. Dữ liệu và biểu đồ',
        requirements: {
          b: 'Nhận biết được mối liên hệ toán học đơn giản giữa các số liệu đã được biểu diễn; từ đó, nhận biết được số liệu không chính xác trong những ví dụ đơn giản.',
          h: 'Thực hiện và lí giải được việc thu thập, phân loại dữ liệu theo các tiêu chí cho trước từ nhiều nguồn khác nhau; chứng tỏ được tính hợp lí của dữ liệu theo các tiêu chí toán học đơn giản.',
          v: 'Lựa chọn và biểu diễn được dữ liệu vào bảng, biểu đồ thích hợp; so sánh được các dạng biểu diễn khác nhau cho một tập dữ liệu; mô tả được cách chuyển dữ liệu từ dạng biểu diễn này sang dạng biểu diễn khác.',
          vdc: 'Phát hiện được vấn đề hoặc quy luật đơn giản dựa trên phân tích các số liệu thu được; giải quyết được những vấn đề đơn giản liên quan đến các số liệu thu được; nhận biết được mối liên hệ giữa thống kê với những kiến thức trong các môn học khác và trong thực tiễn.'
        }
      },
      'phan thuc dai so': {
        unit: 'Tổng hợp chương VI. Phân thức đại số',
        requirements: {
          b: 'Nhận biết được các khái niệm cơ bản về phân thức đại số: định nghĩa, điều kiện xác định, giá trị của phân thức đại số; hai phân thức bằng nhau.',
          h: 'Mô tả được những tính chất cơ bản của phân thức đại số.',
          v: 'Thực hiện được các phép tính: phép cộng, phép trừ, phép nhân, phép chia đối với hai phân thức đại số.',
          vdc: 'Vận dụng được các tính chất giao hoán, kết hợp, phân phối của phép nhân đối với phép cộng, quy tắc dấu ngoặc với phân thức đại số trong tính toán.'
        }
      },
      'phuong trinh bac nhat va ham so bac nhat': {
        unit: 'Tổng hợp chương VII. Phương trình bậc nhất và hàm số bậc nhất',
        requirements: {
          b: 'Nhận biết được những mô hình thực tế dẫn đến khái niệm hàm số; nhận biết được đồ thị hàm số; nhận biết được khái niệm hệ số góc của đường thẳng y = ax + b (a ≠ 0).',
          h: 'Hiểu được khái niệm phương trình bậc nhất một ẩn và cách giải; tính được giá trị của hàm số khi hàm số đó xác định bởi công thức.',
          v: 'Xác định được toạ độ của một điểm trên mặt phẳng toạ độ; xác định được một điểm trên mặt phẳng toạ độ khi biết toạ độ của nó; thiết lập được bảng giá trị và vẽ được đồ thị của hàm số bậc nhất y = ax + b (a ≠ 0).',
          vdc: 'Sử dụng được hệ số góc của đường thẳng để nhận biết và giải thích được sự cắt nhau hoặc song song của hai đường thẳng cho trước; vận dụng được hàm số bậc nhất, đồ thị và phương trình bậc nhất vào giải quyết một số bài toán thực tiễn.'
        }
      },
      'mo dau ve tinh xac suat cua bien co': {
        unit: 'Tổng hợp chương VIII. Mở đầu về tính xác suất của biến cố',
        requirements: {
          b: 'Nhận biết được xác suất của một biến cố ngẫu nhiên trong một số ví dụ đơn giản.',
          h: 'Sử dụng được tỉ số để mô tả xác suất của một biến cố ngẫu nhiên trong một số ví dụ đơn giản.',
          v: 'Nhận biết được mối liên hệ giữa xác suất thực nghiệm của một biến cố với xác suất của biến cố đó thông qua một số ví dụ đơn giản.',
          vdc: 'Sử dụng được phần mềm mô tả thí nghiệm ngẫu nhiên trong điều kiện thực hiện phù hợp.'
        }
      },
      'tam giac dong dang': {
        unit: 'Tổng hợp chương IX. Tam giác đồng dạng',
        requirements: {
          b: 'Mô tả được định nghĩa của hai tam giác đồng dạng; nhận biết được hình đồng dạng phối cảnh (hình vị tự), hình đồng dạng qua các hình ảnh cụ thể.',
          h: 'Giải thích được định lí Pythagore; giải thích được các trường hợp đồng dạng của hai tam giác, của hai tam giác vuông.',
          v: 'Tính được độ dài cạnh trong tam giác vuông bằng cách sử dụng định lí Pythagore; giải quyết được một số vấn đề thực tiễn gắn với việc vận dụng định lí Pythagore.',
          vdc: 'Giải quyết được một số vấn đề thực tiễn gắn với việc vận dụng kiến thức về hai tam giác đồng dạng; nhận biết được vẻ đẹp trong tự nhiên, nghệ thuật, kiến trúc, công nghệ chế tạo biểu hiện qua hình đồng dạng.'
        }
      },
      'mot so hinh khoi trong thuc tien': {
        unit: 'Tổng hợp chương X. Một số hình khối trong thực tiễn',
        requirements: {
          b: 'Mô tả được đỉnh, mặt đáy, mặt bên, cạnh bên của hình chóp tam giác đều và hình chóp tứ giác đều.',
          h: 'Tạo lập được hình chóp tam giác đều và hình chóp tứ giác đều.',
          v: 'Tính được diện tích xung quanh, thể tích của một hình chóp tam giác đều và hình chóp tứ giác đều.',
          vdc: 'Giải quyết được một số vấn đề thực tiễn gắn với việc tính thể tích, diện tích xung quanh của hình chóp tam giác đều và hình chóp tứ giác đều.'
        }
      }
    };

    function cv7991Toan8ChapterReviewFor(chapter) {
      const key = cv7991NormalizeRequirementKey(chapter).replace(/^chuong\s+(?:\d+|[ivxlcdm]+)\s*/i, '').trim();
      return CV7991_TOAN8_CHAPTER_REVIEWS[key] || null;
    }

    function cv7991DefaultItems() {
      return CV7991_TOAN6_LESSONS.map(([chapter, unit, kind], idx) => {
        const reqs = cv7991RequirementsForLesson(unit, kind);
        return { index: idx + 1, chapter, unit, requirements: { b: reqs[0], h: reqs[1], v: reqs[2], vdc: reqs[3] }, available: null };
      });
    }

    function cv7991ChapterGroupKey(chapter) {
      const display = String(chapter || '').trim() || 'Chưa phân chương';
      return cv7991NormalizeRequirementKey(display) || display.toLocaleLowerCase('vi');
    }

    function cv7991GroupSourceItemsByChapter(source) {
      const rows = Array.isArray(source) ? source : [];
      const groups = [];
      const groupByKey = new Map();

      rows.forEach((item, sourceIndex) => {
        const chapter = String(item && item.chapter || '').trim() || 'Chưa phân chương';
        const key = cv7991ChapterGroupKey(chapter);
        let group = groupByKey.get(key);
        if (!group) {
          group = { key, chapter, rows: [] };
          groupByKey.set(key, group);
          groups.push(group);
        }
        group.rows.push({ item, sourceIndex });
      });

      // Giữ thứ tự xuất hiện đầu tiên của từng chương. Trong mỗi chương, giữ nguyên
      // thứ tự file/bài ban đầu. Nhờ vậy Bài tập cuối chương, Luyện tập chung... được
      // đưa về đúng nhóm chương mà không làm đảo thứ tự các bài chính.
      return groups.flatMap((group) => group.rows.map((entry) => ({
        item: entry.item,
        sourceIndex: entry.sourceIndex,
        chapter: group.chapter
      })));
    }

    function cv7991Items() {
      const catalogItems = isCv7991MvipBankSelected() && state.cv7991BankCatalog && Array.isArray(state.cv7991BankCatalog.items)
        ? state.cv7991BankCatalog.items
        : [];
      const loadedItems = state.cv7991Bank && Array.isArray(state.cv7991Bank.items) ? state.cv7991Bank.items : [];
      const source = catalogItems.length ? catalogItems : (loadedItems.length ? loadedItems : cv7991DefaultItems());
      const groupedSource = cv7991GroupSourceItemsByChapter(source);
      return groupedSource.map((entry, idx) => {
        const item = entry && entry.item;
        const unit = String(item && item.unit || '').trim() || `Nội dung ${idx + 1}`;
        const chapter = String(entry && entry.chapter || item && item.chapter || '').trim() || 'Chưa phân chương';
        const reqs = (item && item.requirements) || {};
        const fallbackReqs = cv7991RequirementsForLesson(unit, item && item.kind);
        return {
          index: idx + 1,
          chapter,
          unit,
          unitKey: String(item && item.unitKey || '').trim() || cv7991UnitKey(unit),
          requirements: {
            b: reqs.b || fallbackReqs[0],
            h: reqs.h || fallbackReqs[1],
            v: reqs.v || fallbackReqs[2],
            vdc: reqs.vdc || fallbackReqs[3]
          },
          available: (item && item.available) || null,
          availabilityKnown: item && item.availabilityKnown !== undefined ? !!item.availabilityKnown : !!(item && item.available),
          metadataVersion: Math.max(0, Number(item && item.metadataVersion || 0) || 0),
          availabilityParsed: !!(item && item.availabilityParsed),
          fileName: String(item && item.fileName || '').trim(),
          fileUrl: String(item && item.fileUrl || '').trim(),
          fileIndex: Math.max(0, Number(item && item.fileIndex || 0) || 0),
          fileItemIndex: Math.max(0, Number(item && item.fileItemIndex || 0) || 0),
          lessonNo: Math.max(0, Number(item && item.lessonNo || 0) || 0),
          sourceIndex: Math.max(0, Number(entry && entry.sourceIndex || 0) || 0)
        };
      });
    }

    function cv7991AvailableCount(item, format, level) {
      if (item && item.availabilityKnown === false) return null;
      const available = item && item.available;
      if (!available) return null;
      const key = `${format}_${level}`;
      // Metadata v5 và cũ hơn trên MÁY CHỦ được tạo khi phần mềm mới dùng nhiều lựa chọn.
      // Với ba dạng mới, số 0 của metadata cũ không được dùng để khóa ô.
      // Riêng file Word do người dùng tải trực tiếp đã được parser đọc thật
      // (availabilityParsed=true), nên phải tin chính xác cả các số 0 đó.
      const metadataVersion = Math.max(0, Number(item && item.metadataVersion || 0) || 0);
      if (format !== 'mc' && !item.availabilityParsed && metadataVersion <= 5) return null;
      if (!Object.prototype.hasOwnProperty.call(available, key)) return null;
      return Math.max(0, parseInt(String(available[key] || 0), 10) || 0);
    }

    function cv7991MatrixItemStableKey(item, idx = 0) {
      const fileUrl = String(item && item.fileUrl || '').trim();
      if (fileUrl) return `file:${fileUrl}|item:${Math.max(0, Number(item && item.fileItemIndex || 0) || 0)}`;
      return `unit:${String(item && (item.unitKey || cv7991UnitKey(item.unit)) || idx).trim()}`;
    }

    function cv7991CaptureMatrixSelection() {
      const snapshot = Object.create(null);
      if (!els.cv7991MatrixTable) return snapshot;
      cv7991Items().forEach((item, idx) => {
        const stableKey = cv7991MatrixItemStableKey(item, idx);
        CV7991_FORMATS.forEach((format) => CV7991_LEVELS.forEach((level) => {
          const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${idx}"][data-format="${format}"][data-level="${level}"]`);
          snapshot[`${stableKey}|${format}|${level}`] = Math.max(0, parseInt(String(input && input.value || 0), 10) || 0);
        }));
      });
      return snapshot;
    }

    function cv7991RestoreMatrixSelection(snapshot) {
      if (!els.cv7991MatrixTable || !snapshot) return;
      cv7991Items().forEach((item, idx) => {
        const stableKey = cv7991MatrixItemStableKey(item, idx);
        CV7991_FORMATS.forEach((format) => CV7991_LEVELS.forEach((level) => {
          const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${idx}"][data-format="${format}"][data-level="${level}"]`);
          if (!input) return;
          const key = `${stableKey}|${format}|${level}`;
          if (Object.prototype.hasOwnProperty.call(snapshot, key)) input.value = String(Math.max(0, Number(snapshot[key]) || 0));
        }));
      });
    }

    function cv7991RefreshBankEditorsPreservingSelection() {
      const snapshot = cv7991CaptureMatrixSelection();
      renderCv7991Matrix();
      cv7991RestoreMatrixSelection(snapshot);
      renderCv7991Spec();
      recalcCv7991Matrix();
      if (els.regularTestQuestionModal && !els.regularTestQuestionModal.hidden) renderRegularTestQuestionEditor();
      updateRegularTestGui();
    }

    function cv7991BuildContiguousChapterSpans(items) {
      const rows = Array.isArray(items) ? items : [];
      const spans = new Array(rows.length);
      let start = 0;
      while (start < rows.length) {
        const chapter = String(rows[start] && rows[start].chapter || '').trim() || 'Chưa phân chương';
        let end = start + 1;
        while (end < rows.length) {
          const nextChapter = String(rows[end] && rows[end].chapter || '').trim() || 'Chưa phân chương';
          if (nextChapter !== chapter) break;
          end += 1;
        }
        const meta = { first: start, count: end - start };
        for (let idx = start; idx < end; idx += 1) spans[idx] = meta;
        start = end;
      }
      return spans;
    }

    function renderCv7991Matrix() {
      const tbody = els.cv7991MatrixTable && els.cv7991MatrixTable.querySelector('tbody');
      if (!tbody) return;
      const items = cv7991Items();
      // cv7991Items() đã gom toàn bộ bài cùng chương thành một nhóm liên tiếp.
      // Sau đó chỉ cần tính rowspan cho từng nhóm để bảng luôn đủ đúng số cột.
      const chapterSpans = cv7991BuildContiguousChapterSpans(items);
      let displayRowNo = 0;
      tbody.innerHTML = items.map((item, idx) => {
        displayRowNo += 1;
        const chapter = String(item && item.chapter || '').trim() || 'Chưa phân chương';
        const chapterMeta = chapterSpans[idx] || { first: idx, count: 1 };
        const inputCells = CV7991_FORMATS.map((format) => CV7991_LEVELS.map((level, levelIdx) => {
          const sepClass = levelIdx === 0 ? ' cv7991-type-start' : '';
          const availableCount = cv7991AvailableCount(item, format, level);
          const disabled = availableCount !== null && availableCount === 0;
          const outlineMode = state.classManagerTab === 'outline';
          const maxCount = Math.min(CV7991_MAX_PER_CELL, availableCount == null ? CV7991_MAX_PER_CELL : availableCount);
          const maxAttr = ` max="${maxCount}"`;
          const totalLimit = outlineMode ? CV7991_OUTLINE_MAX_QUESTIONS : CV7991_EXAM_MAX_QUESTIONS;
          const limitHint = ` — ${outlineMode ? 'Đề cương' : 'Đề kiểm tra'}: tối đa ${maxCount} câu/ô, ${totalLimit} câu/lần.`;
          const title = availableCount == null
            ? `${cv7991BankFormatLabel(format)} - ${cv7991LevelLabel(level)}`
            : (availableCount > 0
              ? `Ngân hàng có ${availableCount} câu: ${cv7991BankFormatLabel(format)} - ${cv7991LevelLabel(level)}`
              : `Ngân hàng không có câu: ${cv7991BankFormatLabel(format)} - ${cv7991LevelLabel(level)}`);
          return `<td class="cv7991-center${sepClass}${disabled ? ' cv7991-cell-disabled' : ''}"><input class="cv7991-matrix-input" data-row="${idx}" data-format="${format}" data-level="${level}" min="0"${maxAttr} step="1" inputmode="numeric" type="number" value="0" title="${escapeHtml(title + limitHint)}"${disabled ? ' disabled' : ''}></td>`;
        }).join('')).join('');
        const chapterCell = (chapterMeta.first === idx)
          ? `<td class="cv7991-sticky-chapter" rowspan="${chapterMeta.count}">${escapeHtml(chapter)}</td>`
          : '';
        return `<tr class="cv7991-lesson-start" data-row="${idx}">
          <td class="cv7991-center cv7991-sticky-tt">${displayRowNo}</td>
          ${chapterCell}
          <td class="cv7991-sticky-unit">${escapeHtml(item.unit)}</td>
          ${inputCells}
          ${CV7991_LEVELS.map((level, levelIdx) => `<td class="cv7991-center cv7991-row-total-cell${levelIdx === 0 ? ' cv7991-type-start' : ''}" data-row-total-level="${idx}-${level}">0</td>`).join('')}
          <td class="cv7991-center cv7991-row-rate-cell cv7991-type-start" data-row-rate="${idx}">0%</td>
        </tr>`;
      }).join('');
    }

    function renderCv7991Spec() {
      const tbody = els.cv7991SpecTable && els.cv7991SpecTable.querySelector('tbody');
      if (!tbody) return;
      tbody.innerHTML = cv7991Items().map((item, rowIdx) => {
        return CV7991_LEVELS.map((level) => {
          const cells = CV7991_FORMATS.map((format) => CV7991_LEVELS.map((cellLevel) => {
            const active = level === cellLevel;
            if (!active) return '<td></td>';
            const availableCount = cv7991AvailableCount(item, format, level);
            const disabled = availableCount !== null && availableCount === 0;
            return `<td class="${disabled ? 'cv7991-cell-disabled' : ''}">${disabled ? '' : `<input class="cv7991-spec-input" data-row="${rowIdx}" data-format="${format}" data-level="${level}" placeholder="(n)" readonly>`}</td>`;
          }).join('')).join('');
          return `
            <tr data-row="${rowIdx}" data-level="${level}">
              <td class="cv7991-center">${item.index}</td>
              <td>${escapeHtml(item.chapter)}</td>
              <td>${escapeHtml(item.unit)}</td>
              <td>${escapeHtml(item.requirements[level])}</td>
              ${cells}
            </tr>`;
        }).join('');
      }).join('');
      applyCv7991SpecMatrixFilter();
    }

    function formatCv7991Number(value) {
      const num = Number(value || 0);
      if (!Number.isFinite(num)) return '0';
      return String(Math.round(num * 100) / 100).replace('.', ',');
    }

    function numberValue(value, fallback = 0) {
      const n = Number(String(value == null ? '' : value).replace(',', '.'));
      return Number.isFinite(n) ? n : fallback;
    }

    function formatScoreValue(value) {
      const n = Math.max(0, numberValue(value, 0));
      // Xóa đúng các số 0 dư ở cuối phần thập phân, sau đó mới xóa dấu chấm cuối.
      // Regex cũ /.?0+$/ vô tình xóa luôn chữ số 5 của 0.50, 1.50, 2.50...
      // nên giao diện chỉ còn 0, ; 1, ; 2, ...
      return (Math.round(n * 100) / 100)
        .toFixed(2)
        .replace(/0+$/, '')
        .replace(/\.$/, '')
        .replace('.', ',');
    }

    function cv7991ReadScoreInput(id, fallback) {
      const input = document.getElementById(id);
      return Math.max(0, numberValue(input && input.value, fallback));
    }

    function getCv7991ScoreSettings(questionCountOverride = null) {
      // Điểm số theo cấu hình đề:
      // - Nhiều lựa chọn: 0,25 / 0,5 / 1 điểm mỗi câu.
      // - Đúng-Sai:
      //   + Lựa chọn 1 (mặc định): 1/2/3/4 ý = 0,1 / 0,25 / 0,5 / 1 điểm.
      //   + Lựa chọn 2: mỗi ý đúng 0,25 điểm => 0,25 / 0,5 / 0,75 / 1 điểm.
      // - Trả lời ngắn: 0,25 / 0,5 / 1 điểm mỗi câu (mặc định 0,5).
      // - Tự luận: 1 điểm/câu.
      const mcSelect = document.getElementById('cv7991ScoreMcInput');
      const selectedMc = Math.max(0, numberValue(mcSelect && mcSelect.value, 0.25));
      const allowedMc = [0.25, 0.5, 1];
      const singleScore = allowedMc.some((value) => Math.abs(value - selectedMc) < 0.0001) ? selectedMc : 0.25;

      const tfModeSelect = document.getElementById('cv7991ScoreTfModeInput');
      const trueFalseMode = String(tfModeSelect && tfModeSelect.value || 'tiered') === 'per_item_025'
        ? 'per_item_025' : 'tiered';
      const trueFalseScores = trueFalseMode === 'per_item_025'
        ? { 1: 0.25, 2: 0.5, 3: 0.75, 4: 1 }
        : { 1: 0.1, 2: 0.25, 3: 0.5, 4: 1 };

      const shortSelect = document.getElementById('cv7991ScoreShortInput');
      const selectedShort = Math.max(0, numberValue(shortSelect && shortSelect.value, 0.5));
      const allowedShort = [0.25, 0.5, 1];
      const shortScore = allowedShort.some((value) => Math.abs(value - selectedShort) < 0.0001) ? selectedShort : 0.5;

      return {
        singleScore,
        shortScore,
        essayScore: 1,
        trueFalseMode,
        trueFalseScores
      };
    }

    function cv7991CurrentTypeCounts() {
      const counts = { mc: 0, tf: 0, short: 0, essay: 0 };
      if (!els.cv7991MatrixTable) return counts;
      cv7991Items().forEach((_, idx) => {
        CV7991_FORMATS.forEach((format) => {
          CV7991_LEVELS.forEach((level) => {
            const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${idx}"][data-format="${format}"][data-level="${level}"]`);
            counts[format] += cv7991IntegerValue(input);
          });
        });
      });
      return counts;
    }

    function setTextById(id, value) {
      const el = document.getElementById(id);
      if (el) el.textContent = value;
    }

    function updateCv7991ScoreSummary() {
      const counts = cv7991CurrentTypeCounts();
      const score = getCv7991ScoreSettings();
      const mcTotal = counts.mc * score.singleScore;
      const tfTotal = counts.tf * score.trueFalseScores[4];
      const shortTotal = counts.short * score.shortScore;
      const essayTotal = counts.essay * score.essayScore;
      const grandTotal = mcTotal + tfTotal + shortTotal + essayTotal;
      setTextById('cv7991ScoreMcCount', String(counts.mc));
      setTextById('cv7991ScoreTfCount', String(counts.tf));
      setTextById('cv7991ScoreShortCount', String(counts.short));
      setTextById('cv7991ScoreEssayCount', String(counts.essay));
      setTextById('cv7991ScoreMcTotal', formatScoreValue(mcTotal));
      setTextById('cv7991ScoreTfTotal', formatScoreValue(tfTotal));
      setTextById('cv7991ScoreShortTotal', formatScoreValue(shortTotal));
      setTextById('cv7991ScoreEssayTotal', formatScoreValue(essayTotal));
      setTextById('cv7991ScoreMcTotalLine', formatScoreValue(mcTotal));
      setTextById('cv7991ScoreTfTotalLine', formatScoreValue(tfTotal));
      setTextById('cv7991ScoreShortTotalLine', formatScoreValue(shortTotal));
      setTextById('cv7991ScoreEssayTotalLine', formatScoreValue(essayTotal));
      setTextById('cv7991ScoreGrandTotal', formatScoreValue(grandTotal));

      // Tóm tắt lớn ở đầu bảng ma trận.
      setTextById('cv7991MatrixSummaryMc', String(counts.mc));
      setTextById('cv7991MatrixSummaryTf', String(counts.tf));
      setTextById('cv7991MatrixSummaryShort', String(counts.short));
      setTextById('cv7991MatrixSummaryEssay', String(counts.essay));
      setTextById('cv7991MatrixSummaryPoint', formatScoreValue(grandTotal));
    }

    function cv7991CountQuestionTypes(questions) {
      const counts = { single: 0, true_false: 0, short: 0, essay: 0 };
      (Array.isArray(questions) ? questions : []).forEach((question) => {
        const format = String(question && question.format || 'mc');
        if (format === 'tf') counts.true_false += 1;
        else if (format === 'short') counts.short += 1;
        else if (format === 'essay') counts.essay += 1;
        else counts.single += 1;
      });
      return counts;
    }

    function cv7991BuildScanScoreItems(questions) {
      const items = [];
      (Array.isArray(questions) ? questions : []).forEach((question, index) => {
        if (!question || question.format === 'essay' || question.format === 'short') return;
        const label = String(index + 1);
        if (question.format === 'tf') {
          ['a', 'b', 'c', 'd'].forEach((sub) => items.push({ type: 'true_false', label: `${label}${sub}`, group: label, sub }));
        } else if (question.format === 'short') {
          items.push({ type: 'short', label, group: label, sub: '' });
        } else {
          items.push({ type: 'single', label, group: label, sub: '' });
        }
      });
      return items;
    }

    function buildCv7991ScoringConfigForSave(versions) {
      const firstVersion = Array.isArray(versions) ? versions.find((version) => version && Array.isArray(version.questions)) : null;
      const typeCounts = cv7991CountQuestionTypes(firstVersion ? firstVersion.questions : []);
      const score = getCv7991ScoreSettings(typeCounts.single);
      const partTotals = {
        single: typeCounts.single * score.singleScore,
        true_false: typeCounts.true_false * score.trueFalseScores[4],
        short: typeCounts.short * score.shortScore,
        essay: typeCounts.essay * score.essayScore
      };
      const scoreItemsByCode = {};
      (Array.isArray(versions) ? versions : []).forEach((version) => {
        const code = cv7991DisplayExamCode(version && version.code);
        if (!code || !Array.isArray(version && version.questions)) return;
        scoreItemsByCode[code] = cv7991BuildScanScoreItems(version.questions);
      });
      return {
        source: 'cv7991',
        trueFalseScanRule: 'D_TRUE_ABC_FALSE',
        answerKeyConvention: 'scan_card_logic_v2',
        trueFalseMode: score.trueFalseMode || 'tiered',
        singleScore: score.singleScore,
        shortScore: score.shortScore,
        essayScore: score.essayScore,
        trueFalseScores: score.trueFalseScores,
        typeCounts,
        partTotals,
        totalScore: partTotals.single + partTotals.true_false + partTotals.short + partTotals.essay,
        scoreItems: firstVersion ? cv7991BuildScanScoreItems(firstVersion.questions) : [],
        scoreItemsByCode
      };
    }

    function normalizeScoreItem(raw) {
      const item = (raw && typeof raw === 'object') ? raw : {};
      let type = String(item.type || item.kind || '').trim().toLowerCase();
      const label = cleanScanQuestionLabel(item.label || item.questionLabel || '', '');
      if (!['single', 'true_false', 'short', 'essay'].includes(type)) {
        type = /^\d+[a-d]$/i.test(label) ? 'true_false' : 'single';
      }
      const group = cleanScanQuestionLabel(item.group || item.groupLabel || (type === 'true_false' ? String(label || '').replace(/[a-d]$/i, '') : label), '');
      const subMatch = String(label || '').match(/([a-d])$/i);
      return {
        type,
        label,
        group: group || label,
        sub: String(item.sub || item.part || (subMatch ? subMatch[1] : '') || '').trim().toLowerCase()
      };
    }

    function defaultExamScoringConfig(questionCount = 0) {
      const qCount = Math.max(0, parseInt(String(questionCount || 0), 10) || 0);
      const singleScore = qCount > 0 ? (10 / qCount) : 0;
      const totalScore = qCount > 0 ? 10 : 0;
      return {
        trueFalseScanRule: 'D_TRUE_ABC_FALSE',
        trueFalseMode: 'tiered',
        singleScore,
        shortScore: 0.5,
        essayScore: 1,
        trueFalseScores: { 1: 0.1, 2: 0.25, 3: 0.5, 4: 1 },
        typeCounts: { single: qCount, true_false: 0, short: 0, essay: 0 },
        partTotals: { single: totalScore, true_false: 0, short: 0, essay: 0 },
        totalScore,
        scoreItems: Array.from({ length: qCount }, (_, idx) => ({ type: 'single', label: String(idx + 1), group: String(idx + 1), sub: '' })),
        scoreItemsByCode: {}
      };
    }

    function normalizeExamScoringConfig(raw, questionCount = 0, codeOrder = []) {
      const base = defaultExamScoringConfig(questionCount);
      const obj = decodePackedJson(raw, raw);
      if (!obj || typeof obj !== 'object') return base;
      const tfRaw = (obj.trueFalseScores && typeof obj.trueFalseScores === 'object')
        ? obj.trueFalseScores
        : ((obj.true_false_scores && typeof obj.true_false_scores === 'object') ? obj.true_false_scores : {});
      const rawTypeCounts = (obj.typeCounts && typeof obj.typeCounts === 'object')
        ? obj.typeCounts
        : ((obj.type_counts && typeof obj.type_counts === 'object') ? obj.type_counts : {});
      const rawPartTotals = (obj.partTotals && typeof obj.partTotals === 'object')
        ? obj.partTotals
        : ((obj.part_totals && typeof obj.part_totals === 'object') ? obj.part_totals : {});
      const rawScoreItems = Array.isArray(obj.scoreItems)
        ? obj.scoreItems
        : (Array.isArray(obj.score_items) ? obj.score_items : null);
      const scoring = {
        trueFalseScanRule: String(obj.trueFalseScanRule || obj.true_false_scan_rule || 'D_TRUE_ABC_FALSE'),
        answerKeyConvention: String(obj.answerKeyConvention || obj.answer_key_convention || '').trim(),
        trueFalseMode: String(obj.trueFalseMode || obj.true_false_mode || 'tiered'),
        singleScore: Math.max(0, numberValue(obj.singleScore ?? obj.single_score, base.singleScore)),
        shortScore: Math.max(0, numberValue(obj.shortScore ?? obj.short_score, base.shortScore)),
        essayScore: Math.max(0, numberValue(obj.essayScore ?? obj.essay_score, base.essayScore)),
        trueFalseScores: {
          1: Math.max(0, numberValue(tfRaw[1] ?? tfRaw.one ?? obj.trueFalseScore1 ?? obj.true_false_score_1, base.trueFalseScores[1])),
          2: Math.max(0, numberValue(tfRaw[2] ?? tfRaw.two ?? obj.trueFalseScore2 ?? obj.true_false_score_2, base.trueFalseScores[2])),
          3: Math.max(0, numberValue(tfRaw[3] ?? tfRaw.three ?? obj.trueFalseScore3 ?? obj.true_false_score_3, base.trueFalseScores[3])),
          4: Math.max(0, numberValue(tfRaw[4] ?? tfRaw.four ?? obj.trueFalseScore4 ?? obj.true_false_score_4, base.trueFalseScores[4]))
        },
        typeCounts: Object.assign({}, base.typeCounts, rawTypeCounts),
        partTotals: Object.assign({}, base.partTotals, rawPartTotals),
        totalScore: Math.max(0, numberValue(obj.totalScore ?? obj.total_score, base.totalScore)),
        scoreItems: rawScoreItems ? rawScoreItems.map(normalizeScoreItem) : base.scoreItems,
        scoreItemsByCode: {}
      };
      if (!Array.isArray(scoring.scoreItems) || scoring.scoreItems.length !== questionCount) {
        scoring.scoreItems = base.scoreItems;
      }
      const rawByCode = (obj.scoreItemsByCode && typeof obj.scoreItemsByCode === 'object')
        ? obj.scoreItemsByCode
        : ((obj.score_items_by_code && typeof obj.score_items_by_code === 'object') ? obj.score_items_by_code : {});
      (Array.isArray(codeOrder) ? codeOrder : []).forEach((code) => {
        const arr = rawByCode[code];
        if (Array.isArray(arr) && arr.length === questionCount) {
          scoring.scoreItemsByCode[code] = arr.map(normalizeScoreItem);
        }
      });
      return scoring;
    }

    function rawScoringConfigFromObject(source, fallback = {}) {
      const obj = (source && typeof source === 'object') ? source : {};
      const value = obj.scoringConfig ?? obj.scoring_config ?? obj.scoreConfig ?? obj.score_config ?? obj.scoring ?? fallback;
      const decoded = decodePackedJson(value, value);
      return (decoded && typeof decoded === 'object') ? decoded : fallback;
    }

    function inferScoringQuestionCount(rawScoring, fallback = 0) {
      const raw = (rawScoring && typeof rawScoring === 'object') ? rawScoring : {};
      let count = Math.max(0, parseInt(String(fallback || 0), 10) || 0);
      const scoreItems = Array.isArray(raw.scoreItems) ? raw.scoreItems : (Array.isArray(raw.score_items) ? raw.score_items : []);
      if (scoreItems.length) count = Math.max(count, scoreItems.length);
      const byCode = (raw.scoreItemsByCode && typeof raw.scoreItemsByCode === 'object')
        ? raw.scoreItemsByCode
        : ((raw.score_items_by_code && typeof raw.score_items_by_code === 'object') ? raw.score_items_by_code : {});
      Object.values(byCode || {}).forEach((arr) => {
        if (Array.isArray(arr)) count = Math.max(count, arr.length);
      });
      const typeCounts = (raw.typeCounts && typeof raw.typeCounts === 'object')
        ? raw.typeCounts
        : ((raw.type_counts && typeof raw.type_counts === 'object') ? raw.type_counts : {});
      const singleCount = Math.max(0, parseInt(String(typeCounts.single || typeCounts.mc || 0), 10) || 0);
      const tfCount = Math.max(0, parseInt(String(typeCounts.true_false || typeCounts.trueFalse || typeCounts.tf || 0), 10) || 0);
      const shortCount = Math.max(0, parseInt(String(typeCounts.short || 0), 10) || 0);
      count = Math.max(count, singleCount + tfCount * 4 + shortCount);
      return count;
    }

    function scoringSnapshotForExamConfig(cfg) {
      const qCount = Math.max(0, parseInt(String((cfg && cfg.questionCount) || 0), 10) || 0);
      return normalizeExamScoringConfig(cfg && cfg.scoringConfig, qCount, cfg && cfg.codeOrder || []);
    }

    function examConfigForHistoryRecord(mon, rec) {
      if (!isMultiCodeRecord(rec)) return null;
      const no = recordExamNumber(rec);
      const uid = String((rec && rec.exam_uid) || '').trim();
      const configs = examConfigsForMon(mon);
      let cfg = uid
        ? configs.find((entry) => entry.examNo === no && String((entry && entry.examUid) || '').trim() === uid)
        : null;
      if (!cfg) cfg = configs.find((entry) => entry.examNo === no) || null;
      if (cfg) return cfg;

      const rawScoring = rawScoringConfigFromObject(rec, null);
      if (!rawScoring) return null;
      const codeCorrectMap = (rec && rec.code_correct_map && typeof rec.code_correct_map === 'object') ? rec.code_correct_map : {};
      const codeOrder = Object.keys(codeCorrectMap).map((code) => String(code || '').trim()).filter(Boolean);
      const fallbackCount = parseInt(String((rec && (rec.questionCount || rec.question_count)) || 0), 10) || 0;
      const questionCount = inferScoringQuestionCount(rawScoring, fallbackCount);
      return {
        enabled: true,
        examNo: no,
        examUid: uid,
        createdAt: String((rec && rec.ts) || ''),
        name: String((rec && (rec.examName || rec.exam_name)) || '').trim(),
        questionCount,
        codeOrder,
        answerKeys: {},
        questionLabels: [],
        questionLabelsByCode: {},
        studentCodes: (rec && rec.code_by_student && typeof rec.code_by_student === 'object') ? rec.code_by_student : {},
        scoringConfig: normalizeExamScoringConfig(rawScoring, questionCount, codeOrder)
      };
    }

    function scoreItemForExamRecord(cfg, rec, so) {
      const qIdx = (parseInt(String((rec && rec.q) || 0), 10) || 0) - 1;
      const scoring = normalizeExamScoringConfig(cfg && cfg.scoringConfig, cfg && cfg.questionCount || 0, cfg && cfg.codeOrder || []);
      const codeMap = rec && rec.code_by_student && typeof rec.code_by_student === 'object' ? rec.code_by_student : {};
      const code = String(valueByAliases(codeMap, so) || studentCodeForConfig(cfg, so) || '').trim();
      const byCode = code && scoring.scoreItemsByCode && Array.isArray(scoring.scoreItemsByCode[code]) ? scoring.scoreItemsByCode[code] : null;
      const explicit = byCode && byCode[qIdx] ? byCode[qIdx] : (Array.isArray(scoring.scoreItems) ? scoring.scoreItems[qIdx] : null);
      const labelMap = rec && rec.q_label_by_student && typeof rec.q_label_by_student === 'object' ? rec.q_label_by_student : {};
      const label = cleanScanQuestionLabel(valueByAliases(labelMap, so) || (rec && rec.q_label) || scanQuestionLabelFromConfig(cfg, rec && rec.q, code), String((rec && rec.q) || ''));
      if (/^\d+[a-d]$/i.test(label)) {
        const normalizedExplicit = explicit ? normalizeScoreItem(explicit) : null;
        if (!normalizedExplicit || normalizedExplicit.type === 'single') return normalizeScoreItem({ label, type: 'true_false' });
      }
      if (explicit) return normalizeScoreItem(explicit);
      return normalizeScoreItem({ label, type: /^\d+[a-d]$/i.test(label) ? 'true_false' : 'single' });
    }

    function scoreItemForLiveExam(cfg, so, qNo) {
      if (!cfg) return null;
      const code = studentCodeForConfig(cfg, so);
      const label = scanQuestionLabelForStudentFromConfig(cfg, so, qNo);
      const fakeRec = {
        q: qNo,
        q_label: scanQuestionLabelFromConfig(cfg, qNo),
        q_label_by_student: { [String(so)]: label },
        code_by_student: { [String(so)]: code }
      };
      return scoreItemForExamRecord(cfg, fakeRec, so);
    }

    function trueFalseCardDisplayValue(value) {
      const upper = String(value || '').trim().toUpperCase();
      if (upper === 'D' || upper === 'Đ' || upper === 'ĐÚNG' || upper === 'DUNG' || upper === 'TRUE' || upper === 'T') return 'Đ';
      if (['A', 'B', 'C'].includes(upper) || upper === 'S' || upper === 'SAI' || upper === 'FALSE' || upper === 'F') return 'S';
      return '';
    }

    function isCorrectAnswerForScoreItem(ans, expected, item) {
      const normalizedAns = String(ans || '').trim().toUpperCase();
      const normalizedExpected = String(expected || '').trim().toUpperCase();
      if ((item && item.type) === 'true_false') {
        const ansLogic = trueFalseCardDisplayValue(normalizedAns);
        const expectedLogic = trueFalseCardDisplayValue(normalizedExpected);
        return !!ansLogic && !!expectedLogic && ansLogic === expectedLogic;
      }
      return ['A', 'B', 'C', 'D'].includes(normalizedAns)
        && ['A', 'B', 'C', 'D'].includes(normalizedExpected)
        && normalizedAns === normalizedExpected;
    }

    function displayAnswerForScoreItem(ans, item) {
      const value = String(ans || '').trim().toUpperCase();
      if ((item && item.type) === 'true_false') {
        return trueFalseCardDisplayValue(value) || value;
      }
      return value;
    }

    function displayAnswerForLiveExam(cfg, so, qNo, ans) {
      const item = cfg ? scoreItemForLiveExam(cfg, so, qNo) : null;
      return displayAnswerForScoreItem(ans, item);
    }

    function addExamScoreProgress(progress, cfg, rec, so, ans, expected) {
      if (!progress || !cfg || !rec) return;
      const scoring = normalizeExamScoringConfig(cfg.scoringConfig, cfg.questionCount || 0, cfg.codeOrder || []);
      const item = scoreItemForExamRecord(cfg, rec, so);
      const normalizedAns = String(ans || '').trim().toUpperCase();
      const normalizedExpected = String(expected || '').trim().toUpperCase();
      const isAnswered = ['A', 'B', 'C', 'D'].includes(normalizedAns);
      const isCorrect = isAnswered && ['A', 'B', 'C', 'D'].includes(normalizedExpected) && isCorrectAnswerForScoreItem(normalizedAns, normalizedExpected, item);
      if (item.type === 'true_false') {
        const codeMap = rec && rec.code_by_student && typeof rec.code_by_student === 'object' ? rec.code_by_student : {};
        const code = String(valueByAliases(codeMap, so) || studentCodeForConfig(cfg, so) || '').trim();
        const dateKey = String((rec && rec.date) || '').trim();
        const groupKey = [recordExamNumber(rec), dateKey, code, item.group || item.label || rec.q].join('|');
        if (!progress.trueFalseGroups[groupKey]) progress.trueFalseGroups[groupKey] = { correct: 0 };
        if (isCorrect) progress.trueFalseGroups[groupKey].correct += 1;
        return;
      }
      if (isCorrect) {
        if (item.type === 'short') progress.score += scoring.shortScore;
        else if (item.type === 'essay') progress.score += scoring.essayScore;
        else progress.score += scoring.singleScore;
      }
    }

    function finalizeExamScoreProgress(progress, cfg) {
      const scoring = normalizeExamScoringConfig(cfg && cfg.scoringConfig, cfg && cfg.questionCount || 0, cfg && cfg.codeOrder || []);
      let score = numberValue(progress && progress.score, 0);
      Object.values((progress && progress.trueFalseGroups) || {}).forEach((group) => {
        const correct = Math.max(0, Math.min(4, parseInt(String((group && group.correct) || 0), 10) || 0));
        if (correct > 0) score += numberValue(scoring.trueFalseScores[correct], 0);
      });
      return Math.max(0, score);
    }

    function bindDirectQuestionCountEntry(table, selector) {
      if (!table || table.dataset.directQuestionCountEntryBound === '1') return;
      table.dataset.directQuestionCountEntryBound = '1';

      const findInput = (event) => {
        const target = event && event.target;
        const input = target && target.closest ? target.closest(selector) : null;
        return input && table.contains(input) && !input.disabled ? input : null;
      };

      // Bấm chuột/chạm vào ô đang là 0: coi như ô trống để gõ số mới ngay.
      table.addEventListener('click', (event) => {
        const input = findInput(event);
        if (!input) return;
        if (String(input.value || '').trim() === '0') input.value = '';
      });

      // Hỗ trợ cả nhập bằng bàn phím, dán dữ liệu hoặc bộ gõ khi ô vẫn đang là 0.
      table.addEventListener('beforeinput', (event) => {
        const input = findInput(event);
        if (!input) return;
        if (!String(event.inputType || '').startsWith('insert')) return;
        if (String(input.value || '').trim() === '0') input.value = '';
      });

      // Không nhập gì rồi rời ô thì hiển thị lại số 0 như mặc định.
      table.addEventListener('focusout', (event) => {
        const input = findInput(event);
        if (!input) return;
        if (String(input.value || '').trim() === '') input.value = '0';
      });
    }

    function cv7991IntegerValue(input) {
      if (input && input.disabled) {
        if (String(input.value || '') !== '0') input.value = '0';
        return 0;
      }
      let value = Math.max(0, Math.floor(Number(String(input && input.value || '0').replace(',', '.')) || 0));
      if (input && input.max !== '') {
        const maxValue = Math.max(0, parseInt(String(input.max || '0'), 10) || 0);
        if (Number.isFinite(maxValue)) value = Math.min(value, maxValue);
      }
      if (input && String(input.value) !== String(value)) input.value = String(value);
      return value;
    }

    function cv7991SpecRowHasMatrixData(row, level) {
      if (!els.cv7991MatrixTable) return false;
      return CV7991_FORMATS.some((format) => {
        const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${row}"][data-format="${format}"][data-level="${level}"]`);
        return cv7991IntegerValue(input) > 0;
      });
    }

    function applyCv7991SpecMatrixFilter() {
      const active = !!state.cv7991SpecFilterActive;
      if (els.cv7991SpecFilterMatrixBtn) {
        els.cv7991SpecFilterMatrixBtn.classList.toggle('active', active);
        els.cv7991SpecFilterMatrixBtn.textContent = active ? 'Hiện tất cả' : 'Lọc trùng với ma trận';
        els.cv7991SpecFilterMatrixBtn.setAttribute('aria-pressed', active ? 'true' : 'false');
      }
      if (!els.cv7991SpecTable) return;
      els.cv7991SpecTable.querySelectorAll('tbody tr[data-row][data-level]').forEach((row) => {
        row.hidden = active && !cv7991SpecRowHasMatrixData(row.dataset.row, row.dataset.level);
      });
    }

    function toggleCv7991SpecMatrixFilter() {
      state.cv7991SpecFilterActive = !state.cv7991SpecFilterActive;
      applyCv7991SpecMatrixFilter();
    }

    function syncCv7991SpecFromMatrix() {
      if (!els.cv7991MatrixTable || !els.cv7991SpecTable) return;
      els.cv7991SpecTable.querySelectorAll('.cv7991-spec-input').forEach((specInput) => {
        const row = specInput.dataset.row;
        const format = specInput.dataset.format;
        const level = specInput.dataset.level;
        const matrixInput = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${row}"][data-format="${format}"][data-level="${level}"]`);
        const value = matrixInput ? cv7991IntegerValue(matrixInput) : 0;
        specInput.value = value ? String(value) : '';
      });
      applyCv7991SpecMatrixFilter();
    }

    function recalcCv7991Matrix() {
      if (!els.cv7991MatrixTable) return;
      const totals = {};
      const pointTotals = {};
      CV7991_FORMATS.forEach((format) => CV7991_LEVELS.forEach((level) => {
        totals[`${format}_${level}`] = 0;
        pointTotals[`${format}_${level}`] = 0;
      }));
      const levelTotals = Object.fromEntries(CV7991_LEVELS.map((level) => [level, 0]));
      const levelPointTotals = Object.fromEntries(CV7991_LEVELS.map((level) => [level, 0]));
      const rowPointList = [];
      const score = getCv7991ScoreSettings();
      const scoreByFormat = (format) => {
        if (format === 'tf') return Math.max(0, Number(score.trueFalseScores && score.trueFalseScores[4] || 0));
        if (format === 'short') return Math.max(0, Number(score.shortScore || 0));
        if (format === 'essay') return Math.max(0, Number(score.essayScore || 0));
        return Math.max(0, Number(score.singleScore || 0));
      };
      let grandPoint = 0;
      let grandQuestionCount = 0;

      cv7991Items().forEach((_, idx) => {
        const rowLevelTotals = Object.fromEntries(CV7991_LEVELS.map((level) => [level, 0]));
        const rowLevelPoints = Object.fromEntries(CV7991_LEVELS.map((level) => [level, 0]));
        let rowPoint = 0;
        CV7991_FORMATS.forEach((format) => CV7991_LEVELS.forEach((level) => {
          const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${idx}"][data-format="${format}"][data-level="${level}"]`);
          const value = cv7991IntegerValue(input);
          if (input) {
            const selected = value > 0;
            input.classList.toggle('cv7991-selected-count', selected);
            const td = input.closest('td');
            if (td) td.classList.toggle('cv7991-selected-cell', selected);
          }
          const points = value * scoreByFormat(format);
          totals[`${format}_${level}`] += value;
          pointTotals[`${format}_${level}`] += points;
          rowLevelTotals[level] += value;
          rowLevelPoints[level] += points;
          levelTotals[level] += value;
          levelPointTotals[level] += points;
          rowPoint += points;
          grandQuestionCount += value;
          grandPoint += points;
        }));
        CV7991_LEVELS.forEach((level) => {
          const cell = els.cv7991MatrixTable.querySelector(`[data-row-total-level="${idx}-${level}"]`);
          if (cell) cell.textContent = formatCv7991Number(rowLevelTotals[level]);
        });
        rowPointList.push({ idx, point: rowPoint });
      });

      const suffixByFormat = { mc: 'Mc', tf: 'Tf', short: 'Short', essay: 'Essay' };
      const suffixByLevel = { b: 'B', h: 'H', v: 'V', vdc: 'Vdc' };
      const setCell = (id, value) => {
        const el = document.getElementById(id);
        if (el) el.textContent = value;
      };
      const setPercentCell = (id, points) => {
        const pct = grandPoint > 0 ? (points / grandPoint * 100) : 0;
        setCell(id, `${formatCv7991Number(pct)}%`);
      };
      const aggregateFormatTotals = (format) => {
        const count = CV7991_LEVELS.reduce((sum, level) => sum + Number(totals[`${format}_${level}`] || 0), 0);
        const points = CV7991_LEVELS.reduce((sum, level) => sum + Number(pointTotals[`${format}_${level}`] || 0), 0);
        return { count, points };
      };
      const aggregateAllTotals = () => {
        const count = CV7991_FORMATS.reduce((sum, format) => sum + aggregateFormatTotals(format).count, 0);
        const points = CV7991_FORMATS.reduce((sum, format) => sum + aggregateFormatTotals(format).points, 0);
        return { count, points };
      };

      CV7991_FORMATS.forEach((format) => CV7991_LEVELS.forEach((level) => {
        const fSuf = suffixByFormat[format];
        const lSuf = suffixByLevel[level];
        const count = totals[`${format}_${level}`] || 0;
        const points = pointTotals[`${format}_${level}`] || 0;
        setCell(`cv7991Total${fSuf}${lSuf}`, formatCv7991Number(count));
        setCell(`cv7991Point${fSuf}${lSuf}`, formatScoreValue(points));
        setPercentCell(`cv7991Percent${fSuf}${lSuf}`, points);
      }));

      CV7991_FORMATS.forEach((format) => {
        const fSuf = suffixByFormat[format];
        const aggregate = aggregateFormatTotals(format);
        setCell(`cv7991Total${fSuf}`, formatCv7991Number(aggregate.count));
        setCell(`cv7991Point${fSuf}`, formatScoreValue(aggregate.points));
        setPercentCell(`cv7991Percent${fSuf}`, aggregate.points);
      });
      const aggregateAll = aggregateAllTotals();
      setCell('cv7991TotalAll', formatCv7991Number(aggregateAll.count));
      setCell('cv7991PointAll', formatScoreValue(aggregateAll.points));
      setPercentCell('cv7991PercentAll', aggregateAll.points);

      CV7991_LEVELS.forEach((level) => {
        const lSuf = suffixByLevel[level];
        const count = levelTotals[level] || 0;
        const points = levelPointTotals[level] || 0;
        setCell(`cv7991Total${lSuf}`, formatCv7991Number(count));
        setCell(`cv7991Point${lSuf}`, formatScoreValue(points));
        setPercentCell(`cv7991Percent${lSuf}`, points);
      });

      if (els.cv7991GrandPoint) els.cv7991GrandPoint.textContent = formatCv7991Number(grandQuestionCount);
      setCell('cv7991PointGrand', formatScoreValue(grandPoint));
      setCell('cv7991PercentGrand', grandPoint > 0 ? '100%' : '0%');

      rowPointList.forEach(({ idx, point }) => {
        const cell = els.cv7991MatrixTable.querySelector(`[data-row-rate="${idx}"]`);
        if (cell) {
          const pct = grandPoint > 0 ? (point / grandPoint * 100) : 0;
          cell.textContent = `${formatCv7991Number(pct)}%`;
        }
      });

      syncCv7991SpecFromMatrix();
      updateCv7991ScoreSummary();
    }
    function setCv7991BankStatus(message, type = '') {
      if (!els.cv7991BankStatus) return;
      els.cv7991BankStatus.textContent = message || '';
      els.cv7991BankStatus.className = 'cv7991-bank-status' + (type ? ' ' + type : '');
    }

    function setCv7991ChoiceStatus(el, message, type = '') {
      if (!el) return;
      el.textContent = message || '';
      el.className = 'cv7991-bank-choice-status' + (type ? ' ' + type : '');
    }

    function setCv7991WordBankStatus(message, type = '') {
      setCv7991ChoiceStatus(els.cv7991WordBankStatus, message, type);
    }

    function setCv7991MvipBankStatus(message, type = '') {
      setCv7991ChoiceStatus(els.cv7991MvipBankStatus, message, type);
    }

    function isCv7991MvipBankSelected() {
      if (els.cv7991BankSourceMvipRadio) return !!els.cv7991BankSourceMvipRadio.checked;
      return state.cv7991BankSource === 'mvip';
    }

    function selectCv7991BankSource(source) {
      const normalized = source === 'mvip' ? 'mvip' : 'word';
      state.cv7991BankSource = normalized;
      if (els.cv7991BankSourceWordRadio) els.cv7991BankSourceWordRadio.checked = normalized === 'word';
      if (els.cv7991BankSourceMvipRadio) els.cv7991BankSourceMvipRadio.checked = normalized === 'mvip';
      if (els.cv7991BankSourceWordCard) els.cv7991BankSourceWordCard.classList.toggle('active', normalized === 'word');
      if (els.cv7991BankSourceMvipCard) els.cv7991BankSourceMvipCard.classList.toggle('active', normalized === 'mvip');

      if (normalized === 'word') {
        if (!(state.cv7991Bank && state.cv7991Bank.fileName)) {
          setCv7991WordBankStatus('Lựa chọn này bạn phải tải ngân hàng đề từ máy tính lên', '');
        }
      } else if (!(state.cv7991Bank && state.cv7991Bank.url)) {
        setCv7991MvipBankStatus('Bấm Biên soạn ma trận để tải nhanh danh mục bài. Nội dung câu hỏi chỉ được nạp ở những bài đã chọn khi bấm Lưu hoặc Sinh đề.', '');
      }
    }

    function cv7991SelectedMvipBankUrl() {
      return cv7991SelectedBankDescriptor().url;
    }

    function cv7991ActiveMvipCatalog() {
      if (!isCv7991MvipBankSelected()) return null;
      const catalog = state.cv7991BankCatalog;
      const url = cv7991SelectedMvipBankUrl();
      return catalog && String(catalog.url || '') === String(url || '') ? catalog : null;
    }

    async function ensureCv7991QuestionBankCatalogReady(options = {}) {
      if (!isCv7991MvipBankSelected()) return null;
      const url = cv7991SelectedMvipBankUrl();
      if (!url) {
        const msg = 'Chưa có ngân hàng đề của Mvip phù hợp với lớp-môn đang chọn.';
        setCv7991MvipBankStatus(msg, 'err');
        setCv7991BankStatus(msg, 'err');
        openAlertModal(msg, 'Thông báo');
        return null;
      }
      const catalog = cv7991ActiveMvipCatalog();
      if (catalog && !(options && options.force)) return catalog;
      return await loadCv7991QuestionBankCatalog(options);
    }

    async function ensureCv7991SelectedQuestionBankReady(requests = null, options = {}) {
      if (isCv7991MvipBankSelected()) {
        if (Array.isArray(requests) && requests.length) return await ensureCv7991QuestionBankForRequests(requests, options);
        return await ensureCv7991QuestionBankCatalogReady(options);
      }

      if (state.cv7991Bank && state.cv7991Bank.fileName) return state.cv7991Bank;

      const msg = 'Bạn đang chọn "Tự có ngân hàng đề". Bạn cần bấm "Nhập từ word" và tải file ngân hàng đề từ máy tính lên trước.';
      setCv7991WordBankStatus('Lựa chọn này bạn phải tải ngân hàng đề từ máy tính lên', 'err');
      setCv7991BankStatus(msg, 'err');
      openAlertModal(msg, 'Thông báo');
      return null;
    }

    function resetCv7991MatrixEditor() {
      if (els.cv7991MatrixTable) {
        els.cv7991MatrixTable.querySelectorAll('.cv7991-matrix-input').forEach((input) => {
          input.value = '0';
        });
      }
      recalcCv7991Matrix();
      updateRegularTestGui();
    }

    async function handleCv7991OpenMatrixClick() {
      if (!selectedCv7991Mons().length) {
        openAlertModal('Bạn chưa chọn lớp ở bước 1.', 'Thông báo');
        return;
      }
      // Nút "Biên soạn" trong mục Soạn đề cương phải luôn lấy dữ liệu
      // từ ngân hàng đề của MVIP, không phụ thuộc lựa chọn nguồn trước đó.
      if (state.classManagerTab === 'outline') {
        selectCv7991BankSource('mvip');
      }
      const button = els.cv7991OpenMatrixBtn;
      if (button && button.dataset.busy === '1') return;
      const oldText = button ? button.textContent : '';
      try {
        if (button) {
          button.dataset.busy = '1';
          button.disabled = true;
          button.textContent = isCv7991MvipBankSelected() ? 'Đang tải danh mục bài...' : 'Đang mở ma trận...';
        }
        if (isCv7991MvipBankSelected()) {
          const catalog = await ensureCv7991QuestionBankCatalogReady({ force: true });
          if (!catalog) return;
        } else {
          const loaded = await ensureCv7991SelectedQuestionBankReady();
          if (!loaded) return;
        }
        openCv7991Editor('matrix');
        if (state.classManagerTab !== 'outline') resetCv7991MatrixEditor();
      } catch (error) {
        const message = error.message || 'Không mở được ma trận.';
        setCv7991BankStatus(message, 'err');
        openAlertModal(message, 'Thông báo');
      } finally {
        if (button) {
          button.disabled = false;
          button.dataset.busy = '0';
          button.textContent = oldText || 'Biên soạn ma trận';
        }
      }
    }

    async function handleCv7991MatrixSaveClick(button) {
      const actionButton = button || els.cv7991MatrixSaveBtn;
      if (actionButton && actionButton.dataset.busy === '1') return;
      const oldText = actionButton ? actionButton.textContent : 'Lưu';
      try {
        recalcCv7991Matrix();
        const requests = collectCv7991MatrixRequests();
        if (state.classManagerTab !== 'outline' && !validateCv7991ExamQuestionLimits(requests)) return;
        if (isCv7991MvipBankSelected() && requests.length) {
          if (actionButton) {
            actionButton.dataset.busy = '1';
            actionButton.disabled = true;
            actionButton.textContent = 'Đang nạp bài đã chọn...';
          }
          const loaded = await ensureCv7991QuestionBankForRequests(requests, { reason: 'save-matrix' });
          if (!loaded) return;
          setCv7991BankStatus(`Đã nạp nội dung ${new Set(requests.map((request) => request.item && request.item.fileUrl).filter(Boolean)).size || requests.length} bài được chọn. Các bài không chọn chưa được tải.`, 'ok');
        }
        closeCv7991Editor('matrix');
      } catch (error) {
        const message = error && error.message ? error.message : 'Không lưu được ma trận.';
        setCv7991BankStatus(message, 'err');
        openAlertModal(message, 'Thông báo');
      } finally {
        if (actionButton) {
          actionButton.dataset.busy = '0';
          actionButton.disabled = false;
          actionButton.textContent = oldText || 'Lưu';
        }
      }
    }

    function cv7991FormatKey(format) {
      const text = String(format || '').toLowerCase();
      if (/đúng|dung|sai/.test(text)) return 'tf';
      if (/trả lời ngắn|tra loi ngan/.test(text)) return 'short';
      if (/tự luận|tu luan/.test(text)) return 'essay';
      return 'mc';
    }

    function cv7991LevelKey(level) {
      const text = String(level || '').toLowerCase();
      if (/vdc|vận dụng cao|van dung cao/.test(text)) return 'vdc';
      if (/hiểu|hieu/.test(text)) return 'h';
      if (/vận dụng|van dung/.test(text)) return 'v';
      return 'b';
    }

    function cv7991LevelKeyFromQuestionTag(tag) {
      const plain = cv7991PlainLower(tag).replace(/[^a-z0-9]+/g, '');
      if (plain === 'vdc' || plain === 'vandungcao') return 'vdc';
      if (plain === 'vd' || plain === 'vandung') return 'v';
      if (plain === 'th' || plain === 'thonghieu' || plain === 'hieu') return 'h';
      return 'b';
    }

    function cv7991PlainLower(value) {
      return String(value || '')
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd')
        .replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/\s+/g, ' ')
        .trim();
    }

    function cv7991ShouldRemoveBankMetaLine(line) {
      const plain = cv7991PlainLower(line);
      if (!plain) return false;
      if (/^nang luc\s*:/.test(plain)) return true;
      if (/^(bang|ban)\s+dac\s+ta\b/.test(plain) || /\b(bang|ban)\s+dac\s+ta\b/.test(plain)) return true;
      // “Trả lời ngắn” và “Tự luận” là tiêu đề dạng câu hỏi hợp lệ, không còn loại bỏ.
      return false;
    }

    function cv7991ShouldDropQuestionFormat(format) {
      const key = String(format || '').trim().toLowerCase();
      return !!key && !CV7991_FORMATS.includes(key);
    }

    function cv7991GuideStartInfo(line) {
      const raw = String(line || '').trim();
      if (!raw) return null;
      // Nhận đúng phần lời giải của từng câu, nhưng không nhầm với "Hướng dẫn chấm".
      const match = raw.match(/^(Hướng\s*dẫn(?:\s*giải)?|Lời\s*giải)\s*[:：]\s*(.*)$/i);
      if (!match) return null;
      return {
        label: String(match[1] || '').trim(),
        text: String(match[2] || '').trim()
      };
    }

    function cv7991CleanGuideLines(lines) {
      return (Array.isArray(lines) ? lines : [])
        .map((line) => cv7991StripAnswerHintTokens(String(line || '').trim()))
        .filter((line) => line && !/^Đáp\s*án\s*:/i.test(line) && !/^(Hướng\s*dẫn\s*chấm|Đáp\s*án\s*và\s*thang\s*điểm)\s*:/i.test(line))
        .join('\n')
        .trim();
    }

    function cv7991QuestionGuideForExport(question) {
      const raw = String(question && (question.guide || question.solution || question.explanation) || '')
        .replace(/\r/g, '')
        .trim();
      if (!raw) return '';
      const lines = [];
      raw.split('\n').forEach((line) => {
        const cleanLine = String(line || '').trim();
        if (!cleanLine) return;
        const start = cv7991GuideStartInfo(cleanLine);
        if (start) {
          if (start.text) lines.push(start.text);
          return;
        }
        lines.push(cleanLine);
      });
      return cv7991CleanGuideLines(lines);
    }

    function cv7991DetectQuestionFormatHeading(line) {
      const raw = String(line || '').replace(/\s+/g, ' ').trim();
      if (!raw) return '';
      const exact = raw.match(/^(?:[IVX]+\s*[\.\)]\s*)?(Trắc\s*nghiệm\s*nhiều\s*lựa\s*chọn|TNKQ\s+nhiều\s+lựa\s+chọn|Trắc\s*nghiệm\s*đúng\s*[-–—\/]\s*sai|TNKQ\s+đúng\s*[-–—\/]\s*sai|Trả\s*lời\s*ngắn|TNKQ\s+trả\s+lời\s+ngắn|Tự\s*luận)(?:\s*[-–—]\s*(Biết|Hiểu|Vận dụng cao|VDC|Vận dụng))?\s*$/i);
      if (exact) return cv7991FormatKey(exact[1]);
      const plain = cv7991PlainLower(raw);
      if (/\btra\s+loi\s+ngan\b/.test(plain)) return 'short';
      if (/\btu\s+luan\b/.test(plain)) return 'essay';
      return '';
    }

    function cv7991UnitKey(text) {
      return String(text || '')
        .replace(/^.*?(Bài\s*\d+\.\s*)/i, '$1')
        .replace(/\s+/g, ' ')
        .trim()
        .toLowerCase();
    }

    function cv7991NormalizeDocxPath(path) {
      const parts = String(path || '').replace(/\\/g, '/').split('/');
      const stack = [];
      parts.forEach((part) => {
        if (!part || part === '.') return;
        if (part === '..') stack.pop();
        else stack.push(part);
      });
      return stack.join('/');
    }


    /* Word cũ thường lưu mũi tên phản ứng bằng ba ký tự thuộc font Symbol:
       U+F0BE, U+F0BE, U+F0AE. Trình duyệt không có ánh xạ font này sẽ hiện
       thành các ô vuông. Chuẩn hóa chuỗi đó sang ký tự Unicode trước khi dựng. */
    function cv7991NormalizeLegacyWordSymbolText(value) {
      return String(value == null ? '' : value)
        .replace(/\uF020/gu, ' ')
        .replace(/\uF0BE{1,8}\uF0AE/gu, '⟶')
        .replace(/\uF0BE{1,8}\u2192/gu, '⟶')
        .replace(/[─—]{1,8}→/gu, '⟶')
        .replace(/\uF0AC/gu, '←')
        .replace(/\uF0AD/gu, '↑')
        .replace(/\uF0AE/gu, '→')
        .replace(/\uF0AF/gu, '↓')
        .replace(/\uF0B1/gu, '±')
        .replace(/\uF0B4/gu, '×')
        .replace(/\uF0B8/gu, '÷')
        .replace(/\uF0BE/gu, '─');
    }
    if (typeof window !== 'undefined') {
      window.cv7991NormalizeLegacyWordSymbolText = cv7991NormalizeLegacyWordSymbolText;
    }

    function cv7991DocxMimeByPath(path) {
      const ext = String(path || '').split('.').pop().toLowerCase();
      if (ext === 'jpg' || ext === 'jpeg') return 'image/jpeg';
      if (ext === 'gif') return 'image/gif';
      if (ext === 'bmp') return 'image/bmp';
      if (ext === 'svg') return 'image/svg+xml';
      if (ext === 'webp') return 'image/webp';
      if (ext === 'wmf') return 'image/x-wmf';
      if (ext === 'emf') return 'image/x-emf';
      return 'image/png';
    }

    function cv7991ImagePlaceholderToken(relId) {
      return `[[CV7991_IMG:${String(relId || '').trim()}]]`;
    }

    function cv7991FigureCodeNormalize(code) {
      return String(code || '')
        .replace(/\s+/g, '')
        .replace(/^\[\[\s*HINH\s*:\s*/i, '')
        .replace(/\]\]$/g, '')
        .trim()
        .toUpperCase();
    }

    function cv7991FigureCodeRegex() {
      return /\[\[\s*HINH\s*:\s*([^\]]+?)\s*\]\]/gi;
    }

    function cv7991FirstDocxImageRelIdInLine(line) {
      const match = String(line || '').match(/\[\[CV7991_IMG:([^\]]+)\]\]/i);
      return match ? String(match[1] || '').trim() : '';
    }

    function cv7991LineHasFigureCode(line) {
      cv7991FigureCodeRegex().lastIndex = 0;
      return cv7991FigureCodeRegex().test(String(line || ''));
    }

    function cv7991LineLooksLikeQuestionStart(line) {
      return /^\s*Câu\s+(?:\d+|\.{3}|…+)/i.test(String(line || ''));
    }

    function cv7991LineLooksLikeBankBoundary(line) {
      const value = String(line || '').trim();
      if (!value) return false;
      return cv7991LineLooksLikeQuestionStart(value)
        || /^(?:YCCĐ|YCCD)\s*\d*\s*[:：]/i.test(value)
        || /^Mức\s*độ\s*[:：]/i.test(value)
        || /^(?:[IVX]+\s*[\.\)]\s*)?(Trắc\s*nghiệm\s*nhiều\s*lựa\s*chọn|Trắc\s*nghiệm\s*đúng\s*[-–—\/]\s*sai|Trả\s*lời\s*ngắn|Tự\s*luận)\s*$/i.test(value)
        || !!cv7991ParseTopicLine(value)
        || /^Bài\s*\d+\s*[\.\:]/i.test(value)
        || /^Chương\s+(?:\d+|[ivxlcdm]+)\s*[\.\:：\)]?/i.test(value);
    }

    function cv7991LineLooksLikeFigureDeclaration(line) {
      const value = String(line || '').trim();
      if (!value || !cv7991LineHasFigureCode(value)) return false;
      if (cv7991LineLooksLikeQuestionStart(value)) return false;
      if (/mã\s*hình|ma\s*hinh|mã\s*ảnh|ma\s*anh|thư\s*viện\s*hình|thu\s*vien\s*hinh|thư\s*viện\s*ảnh|thu\s*vien\s*anh/i.test(value)) return true;
      const withoutCodes = value.replace(cv7991FigureCodeRegex(), '').replace(/[\s:：;,.\-–—()\[\]]+/g, '').trim();
      return withoutCodes.length === 0 || /^hình\d*$/i.test(withoutCodes) || /^ảnh\d*$/i.test(withoutCodes);
    }

    function cv7991FindNearbyImageRelIdForFigureCode(lines, index) {
      const current = String(lines[index] || '');
      const sameLine = cv7991FirstDocxImageRelIdInLine(current);
      if (sameLine) return sameLine;
      for (let step = 1; step <= 8; step += 1) {
        const line = String(lines[index + step] || '');
        if (!line) continue;
        if (cv7991LineLooksLikeBankBoundary(line) || (cv7991LineHasFigureCode(line) && !cv7991FirstDocxImageRelIdInLine(line))) break;
        const relId = cv7991FirstDocxImageRelIdInLine(line);
        if (relId) return relId;
      }
      for (let step = 1; step <= 4; step += 1) {
        const line = String(lines[index - step] || '');
        if (!line) continue;
        if (cv7991LineLooksLikeBankBoundary(line) || (cv7991LineHasFigureCode(line) && !cv7991FirstDocxImageRelIdInLine(line))) break;
        const relId = cv7991FirstDocxImageRelIdInLine(line);
        if (relId) return relId;
      }
      return '';
    }

    function cv7991CollectFigureLibraryFromText(text) {
      const lines = String(text || '').replace(/\r/g, '').split('\n');
      const figureMap = Object.create(null);
      const declarations = [];
      lines.forEach((line, index) => {
        if (!cv7991LineLooksLikeFigureDeclaration(line)) return;
        const codes = [];
        let match;
        const codeRe = cv7991FigureCodeRegex();
        while ((match = codeRe.exec(String(line || '')))) {
          const code = cv7991FigureCodeNormalize(match[1]);
          if (code && !codes.includes(code)) codes.push(code);
        }
        if (!codes.length) return;
        const relId = cv7991FindNearbyImageRelIdForFigureCode(lines, index);
        if (!relId) return;
        codes.forEach((code) => {
          if (!figureMap[code]) {
            figureMap[code] = relId;
            declarations.push({ code, relId, line: index + 1 });
          }
        });
      });
      return { figureMap, declarations };
    }

    function cv7991CleanQuestionLineAfterFigureCode(line) {
      let value = String(line || '');
      // Trong thân câu hỏi giáo viên có thể viết:
      //   [[HINH:DL6_B01_H02]]
      // hoặc:
      //   Mã hình: [[HINH:DL6_B01_H02]]
      // Dòng "Mã hình" ở thân câu hỏi chỉ là lệnh chèn ảnh, không được in ra đề Word.
      value = value.replace(/(?:^|\s)(?:mã\s*hình|ma\s*hinh|mã\s*ảnh|ma\s*anh)\s*[:：]?\s*\[\[\s*HINH\s*:\s*[^\]]+?\s*\]\]\s*,?/gi, ' ');
      value = value.replace(/(bản\s*đồ|lược\s*đồ|biểu\s*đồ|sơ\s*đồ|hình|ảnh)\s*\[\[\s*HINH\s*:\s*[^\]]+?\s*\]\]\s*,?/gi, (all, label) => `${label} sau,`);
      value = value.replace(/\[\[\s*HINH\s*:\s*[^\]]+?\s*\]\]/gi, '').replace(/\s+([,.;:!?])/g, '$1').replace(/\s{2,}/g, ' ').trim();
      value = value.replace(/^(?:mã\s*hình|ma\s*hinh|mã\s*ảnh|ma\s*anh)\s*[:：]?$/i, '').trim();
      value = value.replace(/sau,\s*,/gi, 'sau,');
      return value;
    }

    function cv7991ResolveFigureCodesInQuestionText(text, figureMap = {}, declarationLines = null) {
      const lines = String(text || '').replace(/\r/g, '').split('\n');
      const declarationLineSet = declarationLines instanceof Set
        ? declarationLines
        : new Set(Array.isArray(declarationLines) ? declarationLines.map((value) => Number(value) || 0).filter(Boolean) : []);
      const unresolved = [];
      const usedCodes = new Set();
      const output = [];
      lines.forEach((line, index) => {
        const source = String(line || '');
        // Chỉ giữ nguyên các dòng khai báo thật trong "Thư viện hình".
        // Không chặn mọi dòng có chữ "Mã hình", vì trong thân câu hỏi giáo viên
        // có thể dùng "Mã hình: [[HINH:...]]" để chèn ảnh minh họa.
        const isKnownLibraryDeclaration = declarationLineSet.has(index + 1);
        if (!cv7991LineHasFigureCode(source) || isKnownLibraryDeclaration) {
          output.push(source);
          return;
        }
        const imageTokens = [];
        let hasKnownCode = false;
        let match;
        const codeRe = cv7991FigureCodeRegex();
        while ((match = codeRe.exec(source))) {
          const code = cv7991FigureCodeNormalize(match[1]);
          const relId = code ? String(figureMap[code] || '').trim() : '';
          if (code && relId) {
            hasKnownCode = true;
            usedCodes.add(code);
            const token = cv7991ImagePlaceholderToken(relId);
            if (!imageTokens.includes(token)) imageTokens.push(token);
          } else if (code && !unresolved.includes(code)) {
            unresolved.push(code);
          }
        }
        if (!hasKnownCode) {
          output.push(source);
          return;
        }
        const cleaned = cv7991CleanQuestionLineAfterFigureCode(source);
        if (cleaned) output.push(cleaned);
        imageTokens.forEach((token) => output.push(token));
      });
      return { text: output.join('\n'), unresolved, usedCodes: Array.from(usedCodes) };
    }

    function cv7991PrepareQuestionBankTextWithFigures(text) {
      const library = cv7991CollectFigureLibraryFromText(text);
      const declarationLines = new Set((library.declarations || []).map((item) => Number(item && item.line) || 0).filter(Boolean));
      const resolved = cv7991ResolveFigureCodesInQuestionText(text, library.figureMap, declarationLines);
      return {
        text: resolved.text,
        figureMap: library.figureMap,
        figureDeclarations: library.declarations,
        figureUnresolved: resolved.unresolved,
        figureUsedCodes: resolved.usedCodes,
      };
    }

    function cv7991TablePlaceholderToken(tableId) {
      return `[[CV7991_TBL:${String(tableId || '').trim()}]]`;
    }

    function cv7991EquationPlaceholderToken(equationId) {
      return `[[CV7991_OMML:${String(equationId || '').trim()}]]`;
    }

    function cv7991AnswerHintToken(letter) {
      const value = String(letter || '').trim().toUpperCase();
      return /^[A-D]$/.test(value) ? `[[CV7991_ANS:${value}]]` : '';
    }

    function cv7991AnswerHintRegex() {
      return /\[\[\s*CV7991_ANS\s*:\s*([A-D])\s*\]\]/gi;
    }

    function cv7991ExtractAnswerHintsFromLine(line) {
      const result = [];
      const re = cv7991AnswerHintRegex();
      let match;
      while ((match = re.exec(String(line || '')))) {
        const letter = String(match[1] || '').trim().toUpperCase();
        if (/^[A-D]$/.test(letter) && !result.includes(letter)) result.push(letter);
      }
      return result;
    }

    function cv7991ExtractAnswerHintFromLine(line) {
      return cv7991ExtractAnswerHintsFromLine(line)[0] || '';
    }

    function cv7991StripAnswerHintTokens(line) {
      return String(line || '').replace(cv7991AnswerHintRegex(), '').replace(/\s{2,}/g, ' ').trim();
    }

    function cv7991UnderlineStartToken() { return '[[CV7991_FMT_U_START]]'; }
    function cv7991UnderlineEndToken() { return '[[CV7991_FMT_U_END]]'; }

    async function cv7991ImageSizeFromData(data, mimeType) {
      if (!data) return { width: 0, height: 0 };
      const isBrowserImage = /^image\/(png|jpe?g|gif|bmp|webp|svg\+xml)$/i.test(String(mimeType || ''));
      if (!isBrowserImage || typeof Image === 'undefined') return { width: 0, height: 0 };
      return new Promise((resolve) => {
        let done = false;
        const blob = new Blob([data], { type: mimeType || 'image/png' });
        const url = URL.createObjectURL(blob);
        const img = new Image();
        const finish = (value) => {
          if (done) return;
          done = true;
          URL.revokeObjectURL(url);
          resolve(value || { width: 0, height: 0 });
        };
        img.onload = () => finish({ width: img.naturalWidth || img.width || 0, height: img.naturalHeight || img.height || 0 });
        img.onerror = () => finish({ width: 0, height: 0 });
        img.src = url;
        setTimeout(() => finish({ width: 0, height: 0 }), 2500);
      });
    }

    async function cv7991ExtractDocxImages(zip, relationshipIdFilter = null) {
      const imageMap = {};
      if (!zip) return imageMap;
      const allowedRelationshipIds = relationshipIdFilter == null
        ? null
        : new Set(Array.from(relationshipIdFilter || []).map((value) => String(value || '').trim()).filter(Boolean));
      const relsEntry = zip.file('word/_rels/document.xml.rels');
      if (!relsEntry) return imageMap;
      const relsXml = await relsEntry.async('string');
      const relsDoc = new DOMParser().parseFromString(relsXml, 'application/xml');
      let relNodes = Array.from(relsDoc.getElementsByTagNameNS('*', 'Relationship') || []);
      if (!relNodes.length) relNodes = Array.from(relsDoc.getElementsByTagName('Relationship') || []);
      const relationshipById = new Map(relNodes.map((rel) => [rel.getAttribute('Id') || '', rel]));
      const relationshipPath = (rel) => {
        const target = rel && rel.getAttribute ? rel.getAttribute('Target') || '' : '';
        const decodedTarget = (() => {
          try { return decodeURIComponent(target); } catch (_) { return target; }
        })();
        return cv7991NormalizeDocxPath(decodedTarget.startsWith('/')
          ? decodedTarget.replace(/^\/+/, '')
          : `word/${decodedTarget}`);
      };
      await Promise.all(relNodes.map(async (rel) => {
        const relId = rel.getAttribute('Id') || '';
        const type = rel.getAttribute('Type') || '';
        const target = rel.getAttribute('Target') || '';
        const targetMode = rel.getAttribute('TargetMode') || '';
        if (!relId || (allowedRelationshipIds && !allowedRelationshipIds.has(relId))
            || !/\/image$/i.test(type) || !target || /^External$/i.test(targetMode)) return;
        const mediaPath = relationshipPath(rel);
        const entry = zip.file(mediaPath);
        if (!entry) return;
        const data = await entry.async('uint8array');
        const mimeType = cv7991DocxMimeByPath(mediaPath);
        const size = await cv7991ImageSizeFromData(data, mimeType);
        imageMap[relId] = {
          relId,
          path: mediaPath,
          mimeType,
          data,
          width: size.width || 0,
          height: size.height || 0,
        };
      }));

      /* MathType thường lưu công thức đầy đủ trong word/embeddings/*.bin còn
         word/media/*.wmf chỉ là ảnh xem trước. Đọc cặp quan hệ nằm trong cùng
         w:object để mọi chế độ có thể ưu tiên TeX/MTEF của OLE gốc; WMF vẫn
         được giữ nguyên để lấy đúng khung hình học và làm đường dự phòng. */
      try {
        const documentEntry = zip.file('word/document.xml');
        const documentXml = documentEntry ? await documentEntry.async('string') : '';
        const documentDoc = documentXml
          ? new DOMParser().parseFromString(documentXml, 'application/xml') : null;
        const objects = Array.from(documentDoc && documentDoc.getElementsByTagName('*') || [])
          .filter((element) => String(element.localName || element.nodeName || '')
            .split(':').pop().toLowerCase() === 'object');
        await Promise.all(objects.map(async (objectNode) => {
          const descendants = Array.from(objectNode.getElementsByTagName('*') || []);
          const previewNode = descendants.find((element) => {
            const local = String(element.localName || element.nodeName || '').split(':').pop().toLowerCase();
            return local === 'imagedata' || local === 'blip';
          });
          const oleNode = descendants.find((element) => String(element.localName || element.nodeName || '')
            .split(':').pop().toLowerCase() === 'oleobject');
          const previewId = cv7991RelationIdFromElement(previewNode);
          const oleId = cv7991RelationIdFromElement(oleNode);
          const preview = imageMap[previewId];
          const oleRelationship = relationshipById.get(oleId);
          if (!preview || !oleRelationship || !/\/oleObject$/i.test(oleRelationship.getAttribute('Type') || '')
              || /^External$/i.test(oleRelationship.getAttribute('TargetMode') || '')) return;
          const olePath = relationshipPath(oleRelationship);
          const oleEntry = zip.file(olePath);
          if (!oleEntry) return;
          preview.oleData = await oleEntry.async('uint8array');
          preview.olePath = olePath;
          const program = String(oleNode && oleNode.getAttribute('ProgID') || '');
          preview.oleProgId = program || preview.oleProgId || '';
          if (/Equation|MathType|DSMT/i.test(program)) {
            try {
              preview.cv7991OriginalOleObjectXml = new XMLSerializer().serializeToString(objectNode);
            } catch (_) {
              preview.cv7991OriginalOleObjectXml = '';
            }
            preview.cv7991OriginalPreviewRelId = previewId || '';
            preview.cv7991OriginalOleRelId = oleId || '';
          }
          if (/Package|Media|Video/i.test(program) && !/Equation|MathType|DSMT/i.test(program)
              && window.mvipWordVideo) {
            preview.embeddedVideo = window.mvipWordVideo.extract(preview.oleData);
          }
        }));
      } catch (_) {}
      return imageMap;
    }

    async function cv7991ExtractDocxStyleContext(zip) {
      const readXml = async (path) => {
        try {
          const entry = zip && zip.file ? zip.file(path) : null;
          return entry ? await entry.async('string') : '';
        } catch (_) {
          return '';
        }
      };
      return {
        stylesXml: await readXml('word/styles.xml'),
        themeXml: await readXml('word/theme/theme1.xml'),
        /* v16: cần numbering.xml để giữ nhãn a)/b)/c)/d) được Word tạo
           bằng danh sách tự động. Trước đây bộ đọc chỉ lấy text run nên các
           nhãn này biến mất ở một số file Toán 8. */
        numberingXml: await readXml('word/numbering.xml'),
      };
    }

    function cv7991RelationIdFromElement(element) {
      if (!element || !element.getAttribute) return '';
      const R_NS = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';
      return element.getAttributeNS(R_NS, 'embed')
        || element.getAttributeNS(R_NS, 'id')
        || element.getAttributeNS(R_NS, 'link')
        || element.getAttribute('r:embed')
        || element.getAttribute('r:id')
        || element.getAttribute('r:link')
        || '';
    }

    function cv7991CssSizeToPoint(value) {
      const text = String(value || '').trim().toLowerCase();
      const match = text.match(/^(-?\d+(?:\.\d+)?)(pt|px|cm|mm|in)?$/i);
      if (!match) return 0;
      const num = Number(match[1]);
      if (!Number.isFinite(num) || num <= 0) return 0;
      const unit = String(match[2] || 'pt').toLowerCase();
      if (unit === 'cm') return num * 28.3464567;
      if (unit === 'mm') return num * 2.83464567;
      if (unit === 'in') return num * 72;
      if (unit === 'px') return num * 0.75;
      return num;
    }

    function cv7991ImageDisplaySizeFromNode(node) {
      const elements = [node].concat(Array.from(node && node.getElementsByTagName ? node.getElementsByTagName('*') : []));
      const readEmuExtent = (element) => {
        if (!element || !element.getAttribute) return { widthPt: 0, heightPt: 0 };
        const cx = Number(element.getAttribute('cx') || element.getAttribute('wp:cx') || element.getAttribute('a:cx') || 0);
        const cy = Number(element.getAttribute('cy') || element.getAttribute('wp:cy') || element.getAttribute('a:cy') || 0);
        return {
          widthPt: cx > 0 ? cx / 12700 : 0,
          heightPt: cy > 0 ? cy / 12700 : 0,
        };
      };
      const validSize = (size) => !!(size && (Number(size.widthPt) > 0 || Number(size.heightPt) > 0));

      // Ưu tiên wp:extent: đây là kích thước mà Word thực sự dùng để hiển thị hình trên trang.
      // Không lấy nhầm a:ext của hệ tọa độ bên trong ảnh WMF/EMF, vì tỷ lệ đó có thể khác
      // tỷ lệ người dùng đang nhìn thấy trong Word.
      for (const element of elements) {
        if (!element || !element.getAttribute) continue;
        const local = String(element.localName || '').toLowerCase();
        const nodeName = String(element.nodeName || '').toLowerCase();
        const ns = String(element.namespaceURI || '').toLowerCase();
        const isWpExtent = local === 'extent' && (/wordprocessingdrawing/.test(ns) || /^wp:extent$/i.test(nodeName));
        if (!isWpExtent) continue;
        const size = readEmuExtent(element);
        if (validSize(size)) return size;
      }

      // Ảnh VML/Word cũ thường lưu kích thước hiển thị ở thuộc tính style của v:shape.
      for (const element of elements) {
        if (!element || !element.getAttribute) continue;
        const style = String(element.getAttribute('style') || '');
        const widthMatch = style.match(/(?:^|;)\s*width\s*:\s*([^;]+)/i);
        const heightMatch = style.match(/(?:^|;)\s*height\s*:\s*([^;]+)/i);
        const widthPt = widthMatch ? cv7991CssSizeToPoint(widthMatch[1]) : 0;
        const heightPt = heightMatch ? cv7991CssSizeToPoint(heightMatch[1]) : 0;
        if (widthPt || heightPt) return { widthPt, heightPt };
      }

      // Sau wp:extent mới dùng a:ext của DrawingML làm phương án dự phòng.
      for (const element of elements) {
        if (!element || !element.getAttribute) continue;
        const local = String(element.localName || '').toLowerCase();
        const nodeName = String(element.nodeName || '').toLowerCase();
        const ns = String(element.namespaceURI || '').toLowerCase();
        const isDrawingExt = local === 'ext' && (/drawingml\/2006\/main/.test(ns) || /^a:ext$/i.test(nodeName));
        if (!isDrawingExt) continue;
        const size = readEmuExtent(element);
        if (validSize(size)) return size;
      }

      // Tương thích với các tệp Word không khai báo namespace đầy đủ.
      for (const element of elements) {
        if (!element || !element.getAttribute) continue;
        const local = String(element.localName || element.nodeName || '').toLowerCase();
        if (local !== 'extent' && local !== 'ext' && !/:extent$/i.test(local) && !/:ext$/i.test(local)) continue;
        const size = readEmuExtent(element);
        if (validSize(size)) return size;
      }

      for (const element of elements) {
        if (!element || !element.getAttribute) continue;
        const dxaOrig = Number(element.getAttribute('w:dxaOrig') || element.getAttribute('dxaOrig') || 0);
        const dyaOrig = Number(element.getAttribute('w:dyaOrig') || element.getAttribute('dyaOrig') || 0);
        if (dxaOrig || dyaOrig) return { widthPt: dxaOrig ? dxaOrig / 20 : 0, heightPt: dyaOrig ? dyaOrig / 20 : 0 };
      }
      return { widthPt: 0, heightPt: 0 };
    }

    function cv7991QuestionDrawingAnchor(node) {
      const anchor = node && node.getElementsByTagNameNS && node.getElementsByTagNameNS('*', 'anchor')[0];
      if (!anchor) return null;
      const child = (parent, name) => parent && parent.getElementsByTagNameNS('*', name)[0];
      const horizontal = child(anchor, 'positionH'), vertical = child(anchor, 'positionV');
      const coordinate = (parent) => Number(child(parent, 'posOffset') && child(parent, 'posOffset').textContent) / 9525 || 0;
      const alignment = (parent) => String(child(parent, 'align') && child(parent, 'align').textContent || '');
      return {
        x: coordinate(horizontal), y: coordinate(vertical),
        horizontal: String(horizontal && horizontal.getAttribute('relativeFrom') || ''),
        vertical: String(vertical && vertical.getAttribute('relativeFrom') || ''),
        align: alignment(horizontal),
        wrap: child(anchor, 'wrapSquare') || child(anchor, 'wrapTight') || child(anchor, 'wrapThrough') ? 'square'
          : child(anchor, 'wrapTopAndBottom') ? 'top-bottom' : 'none',
        rightPx: Number(anchor.getAttribute('distR')) / 9525 || 0,
        leftPx: Number(anchor.getAttribute('distL')) / 9525 || 0,
        topPx: Number(anchor.getAttribute('distT')) / 9525 || 0,
        bottomPx: Number(anchor.getAttribute('distB')) / 9525 || 0,
        behind: /^(1|true)$/.test(anchor.getAttribute('behindDoc') || '')
      };
    }

    const cv7991ImageOccurrenceStates = new WeakMap();
    function cv7991ImageOccurrenceId(node, imageMap, relId) {
      // A relationship identifies image bytes, not a placed drawing. Copies
      // can share those bytes while retaining different sizes and anchors.
      let state = cv7991ImageOccurrenceStates.get(imageMap);
      if (!state) {
        state = { nodes: new WeakMap(), sources: new Map() };
        cv7991ImageOccurrenceStates.set(imageMap, state);
      }
      let ids = state.nodes.get(node);
      if (!ids) { ids = new Map(); state.nodes.set(node, ids); }
      if (ids.has(relId)) return ids.get(relId);
      let source = state.sources.get(relId);
      let id = relId;
      if (!source) {
        source = { image: Object.assign({}, imageMap[relId]), count: 1 };
        state.sources.set(relId, source);
      } else {
        do { id = `${relId}__cv_occ_${++source.count}`; } while (imageMap[id]);
        imageMap[id] = Object.assign({}, source.image, { relId: id, sourceRelId: relId });
      }
      ids.set(relId, id);
      return id;
    }

    function cv7991ImagePlaceholdersForNode(node, imageMap, characterHeightPt = 12) {
      const placeholders = [];
      const seen = new Set();
      const displaySize = cv7991ImageDisplaySizeFromNode(node);
      const elements = [node].concat(Array.from(node && node.getElementsByTagName ? node.getElementsByTagName('*') : []));
      /* Giữ vị trí dọc w:position của run chứa OLE. Chế độ Word thông thường
         đã dùng giá trị này khi căn baseline; lưu cùng ảnh để luồng câu hỏi có
         thể áp dụng đúng cùng phép quy đổi nửa point -> CSS px. */
      let wordPositionHalfPoints = 0;
      let runNode = node;
      while (runNode && runNode.nodeType === Node.ELEMENT_NODE) {
        const runName = String(runNode.localName || runNode.nodeName || '').split(':').pop().toLowerCase();
        if (runName === 'r') break;
        runNode = runNode.parentNode;
      }
      if (runNode && String(runNode.localName || runNode.nodeName || '').split(':').pop().toLowerCase() === 'r') {
        const runProperties = Array.from(runNode.childNodes || []).find((child) =>
          child && child.nodeType === Node.ELEMENT_NODE
          && String(child.localName || child.nodeName || '').split(':').pop().toLowerCase() === 'rpr'
        );
        const positionNode = Array.from(runProperties && runProperties.childNodes || []).find((child) =>
          child && child.nodeType === Node.ELEMENT_NODE
          && String(child.localName || child.nodeName || '').split(':').pop().toLowerCase() === 'position'
        );
        const parsedPosition = parseFloat(positionNode && (
          positionNode.getAttribute('w:val') || positionNode.getAttribute('val') || ''
        ));
        if (Number.isFinite(parsedPosition)) wordPositionHalfPoints = parsedPosition;
      }
      const oleFormulaNode = elements.find((element) => {
        if (!element || !element.getAttribute) return false;
        const local = String(element.localName || element.nodeName || '').toLowerCase();
        if (local !== 'oleobject') return false;
        return /Equation|MathType|DSMT/i.test(String(element.getAttribute('ProgID') || element.getAttribute('o:ProgID') || element.getAttribute('progID') || ''));
      });
      const isEquationObject = !!oleFormulaNode;
      const oleProgId = oleFormulaNode ? String(oleFormulaNode.getAttribute('ProgID') || oleFormulaNode.getAttribute('o:ProgID') || oleFormulaNode.getAttribute('progID') || '') : '';
      elements.forEach((element) => {
        const relId = cv7991RelationIdFromElement(element);
        if (!relId || seen.has(relId) || !imageMap || !imageMap[relId]) return;
        seen.add(relId);
        const occurrenceId = cv7991ImageOccurrenceId(node, imageMap, relId);
        const image = imageMap[occurrenceId];
        image.sourceAnchor = cv7991QuestionDrawingAnchor(node);
        if (displaySize && (displaySize.widthPt || displaySize.heightPt)) {
          if (displaySize.widthPt) {
            image.displayWidthPt = displaySize.widthPt;
            image.sourceDisplayWidthPt = displaySize.widthPt;
          }
          if (displaySize.heightPt) {
            image.displayHeightPt = displaySize.heightPt;
            image.sourceDisplayHeightPt = displaySize.heightPt;
          }
        }
        image.wordCharacterHeightPt = Math.max(6,
          Number(characterHeightPt) > 0 ? Number(characterHeightPt) : 12
        );
        if (isEquationObject) {
          image.isMathTypeFormula = true;
          image.presenterFormula = true;
          image.oleProgId = oleProgId || 'Equation';
          image.wordPositionHalfPoints = wordPositionHalfPoints;
        }
        placeholders.push(cv7991ImagePlaceholderToken(occurrenceId));
      });
      return placeholders;
    }

    function cv7991SafeDocumentLinkUrl(value) {
      return mvipSafeHyperlink(value);
    }

    async function cv7991ExtractDocxHyperlinkTargets(zip) {
      const targets = Object.create(null);
      const entry = zip.file('word/_rels/document.xml.rels');
      if (!entry) return targets;
      const doc = new DOMParser().parseFromString(await entry.async('string'), 'application/xml');
      Array.from(doc.getElementsByTagNameNS('*', 'Relationship')).forEach((relationship) => {
        if (!/\/hyperlink$/i.test(relationship.getAttribute('Type') || '')
          || !/^external$/i.test(relationship.getAttribute('TargetMode') || '')) return;
        const id = relationship.getAttribute('Id');
        const href = cv7991SafeDocumentLinkUrl(relationship.getAttribute('Target'));
        if (id && href) targets[id] = href;
      });
      return targets;
    }

    function cv7991QuestionTextFromDocXml(xml, imageMap = {}, tableMap = {}, equationMap = {}, wordStyleContext = {}, hyperlinkContext = null) {
      const parser = new DOMParser();
      const doc = parser.parseFromString(xml, 'application/xml');
      const W_NS = 'http://schemas.openxmlformats.org/wordprocessingml/2006/main';
      const M_NS = 'http://schemas.openxmlformats.org/officeDocument/2006/math';
      const body = doc.getElementsByTagNameNS(W_NS, 'body')[0];
      if (!body) return '';
      const lines = [];
      const sourceBlocks = [];
      let tableIndex = 0;
      let equationIndex = 0;
      let wordGroupIndex = 0;
      let hyperlinkIndex = 0;
      const firstChildByLocalName = (node, localName) => {
        const wanted = String(localName || '').toLowerCase();
        return Array.from(node && node.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === wanted) || null;
      };
      const cv7991WordAttr = (node, name) => {
        if (!node || !node.getAttribute) return '';
        return node.getAttributeNS(W_NS, name)
          || node.getAttribute(`w:${name}`)
          || node.getAttribute(name)
          || '';
      };
      const cv7991DirectChildren = (node, localName = '') => {
        const wanted = String(localName || '').toLowerCase();
        return Array.from(node && node.childNodes || []).filter((child) => {
          if (!child || child.nodeType !== Node.ELEMENT_NODE) return false;
          return !wanted || String(child.localName || '').toLowerCase() === wanted;
        });
      };
      const cv7991ParseXmlSafely = (source) => {
        const raw = String(source || '').trim();
        if (!raw) return null;
        try {
          const parsed = parser.parseFromString(raw, 'application/xml');
          if (parsed.getElementsByTagName('parsererror').length) return null;
          return parsed;
        } catch (_) {
          return null;
        }
      };
      const cv7991StylesDoc = cv7991ParseXmlSafely(wordStyleContext && wordStyleContext.stylesXml);
      const cv7991ThemeDoc = cv7991ParseXmlSafely(wordStyleContext && wordStyleContext.themeXml);

      const cv7991NumberingDoc = cv7991ParseXmlSafely(wordStyleContext && wordStyleContext.numberingXml);

      /* v16 - Khôi phục nhãn danh sách tự động của Word.
         Một số bộ câu hỏi Toán 8 không gõ trực tiếp “a)”, “b)”, “c)”, “d)”;
         các ký tự đó là w:numPr + numbering.xml. Khi chỉ đọc w:t, nội dung
         còn nguyên nhưng nhãn a/b/c/d bị mất, làm parser dồn các phát biểu lên
         phần đề bài và tạo bốn hàng rỗng. KHTN7 gõ nhãn trực tiếp nên trước đây
         vẫn đúng. Chỉ vật chất hóa lowerLetter/upperLetter để không thay đổi
         các danh sách số thông thường trong tài liệu. */
      const cv7991NumberingLevels = new Map();
      const cv7991NumberingInstances = new Map();
      const cv7991NumberingCounters = new Map();
      /* Các ý a/b/c/d do Word tự đánh số đôi khi KHÔNG có numPr trên đoạn.
         Word lưu numPr trong kiểu đoạn (styles.xml), hoặc gắn kiểu đoạn
         với một cấp danh sách trong numbering.xml. Giữ nguyên đoạn gõ tay. */
      const cv7991NumberingParagraphStyles = new Map();
      if (cv7991StylesDoc) {
        Array.from(cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'style') || []).forEach((styleNode) => {
          if (String(cv7991WordAttr(styleNode, 'type') || '').toLowerCase() !== 'paragraph') return;
          const styleId = String(cv7991WordAttr(styleNode, 'styleId') || '').trim();
          if (!styleId) return;
          const pPr = firstChildByLocalName(styleNode, 'pPr');
          const numPr = firstChildByLocalName(pPr, 'numPr');
          cv7991NumberingParagraphStyles.set(styleId, {
            basedOn: String(cv7991WordAttr(firstChildByLocalName(styleNode, 'basedOn'), 'val') || '').trim(),
            numId: String(cv7991WordAttr(firstChildByLocalName(numPr, 'numId'), 'val') || '').trim(),
            ilvl: String(cv7991WordAttr(firstChildByLocalName(numPr, 'ilvl'), 'val') || '').trim(),
          });
        });
      }
      const cv7991NumberingStyleLevelLinks = new Map();

      if (cv7991NumberingDoc) {
        Array.from(cv7991NumberingDoc.getElementsByTagNameNS(W_NS, 'abstractNum') || []).forEach((abstractNode) => {
          const abstractId = String(cv7991WordAttr(abstractNode, 'abstractNumId') || '').trim();
          if (!abstractId) return;
          const levels = new Map();
          Array.from(abstractNode.getElementsByTagNameNS(W_NS, 'lvl') || []).forEach((levelNode) => {
            const ilvl = String(cv7991WordAttr(levelNode, 'ilvl') || '0').trim();
            const numFmtNode = firstChildByLocalName(levelNode, 'numFmt');
            const lvlTextNode = firstChildByLocalName(levelNode, 'lvlText');
            const startNode = firstChildByLocalName(levelNode, 'start');
            levels.set(ilvl, {
              numFmt: String(cv7991WordAttr(numFmtNode, 'val') || '').trim(),
              lvlText: String(cv7991WordAttr(lvlTextNode, 'val') || '%1').trim() || '%1',
              start: Math.max(1, parseInt(String(cv7991WordAttr(startNode, 'val') || '1'), 10) || 1),
              pStyle: String(cv7991WordAttr(firstChildByLocalName(levelNode, 'pStyle'), 'val') || '').trim(),
            });
          });
          cv7991NumberingLevels.set(abstractId, levels);
        });

        Array.from(cv7991NumberingDoc.getElementsByTagNameNS(W_NS, 'num') || []).forEach((numNode) => {
          const numId = String(cv7991WordAttr(numNode, 'numId') || '').trim();
          const abstractIdNode = firstChildByLocalName(numNode, 'abstractNumId');
          const abstractId = String(cv7991WordAttr(abstractIdNode, 'val') || '').trim();
          if (!numId || !abstractId) return;
          const startOverrides = new Map();
          const levelOverrides = new Map();
          Array.from(numNode.getElementsByTagNameNS(W_NS, 'lvlOverride') || []).forEach((overrideNode) => {
            const ilvl = String(cv7991WordAttr(overrideNode, 'ilvl') || '0').trim();
            const startOverride = firstChildByLocalName(overrideNode, 'startOverride');
            const value = parseInt(String(cv7991WordAttr(startOverride, 'val') || ''), 10);
            if (Number.isFinite(value) && value > 0) startOverrides.set(ilvl, value);
            const overrideLevel = firstChildByLocalName(overrideNode, 'lvl');
            if (overrideLevel) {
              const base = (cv7991NumberingLevels.get(abstractId) || new Map()).get(ilvl) || {};
              levelOverrides.set(ilvl, {
                numFmt: String(cv7991WordAttr(firstChildByLocalName(overrideLevel, 'numFmt'), 'val') || base.numFmt || '').trim(),
                lvlText: String(cv7991WordAttr(firstChildByLocalName(overrideLevel, 'lvlText'), 'val') || base.lvlText || '%1').trim(),
                start: Number(cv7991WordAttr(firstChildByLocalName(overrideLevel, 'start'), 'val')) || base.start || 1,
                pStyle: String(cv7991WordAttr(firstChildByLocalName(overrideLevel, 'pStyle'), 'val') || base.pStyle || '').trim(),
              });
            }
          });
          cv7991NumberingInstances.set(numId, { abstractId, startOverrides, levelOverrides });
        });
        /* Có những danh sách dùng w:lvl/w:pStyle để chọn kiểu đoạn,
           thay vì w:pPr/w:numPr trong document.xml hoặc styles.xml. */
        cv7991NumberingInstances.forEach((instance, numId) => {
          const levels = cv7991NumberingLevels.get(instance.abstractId) || new Map();
          levels.forEach((level, ilvl) => {
            const chosen = instance.levelOverrides.get(ilvl) || level;
            const styleId = String(chosen.pStyle || '').trim();
            if (!styleId || !/^(?:lowerLetter|upperLetter|decimal)$/i.test(chosen.numFmt || '')) return;
            if (!cv7991NumberingStyleLevelLinks.has(styleId)) cv7991NumberingStyleLevelLinks.set(styleId, []);
            cv7991NumberingStyleLevelLinks.get(styleId).push({ numId, ilvl });
          });
        });
      }

      const cv7991AlphabeticListLabel = (number, upper = false) => {
        let value = Math.max(1, Number(number) || 1);
        let output = '';
        while (value > 0) {
          value -= 1;
          output = String.fromCharCode(97 + (value % 26)) + output;
          value = Math.floor(value / 26);
        }
        return upper ? output.toUpperCase() : output;
      };

      const cv7991ParagraphAutomaticLetterPrefix = (paragraphNode, visibleText = '', allowNdtcNumber = false) => {
        if (!cv7991NumberingDoc || !paragraphNode) return '';
        const pPr = firstChildByLocalName(paragraphNode, 'pPr');
        const numPr = firstChildByLocalName(pPr, 'numPr');
        const styleId = String(cv7991WordAttr(firstChildByLocalName(pPr, 'pStyle'), 'val') || '').trim();
        let numId = String(cv7991WordAttr(firstChildByLocalName(numPr, 'numId'), 'val') || '').trim();
        let ilvl = String(cv7991WordAttr(firstChildByLocalName(numPr, 'ilvl'), 'val') || '').trim();
        /* w:numId=0 là lệnh hủy đánh số của Word, không được kế thừa. */
        if (numId === '0') return '';
        const visitedStyles = new Set();
        const styleChain = [];
        let cursor = styleId;
        while (cursor && !visitedStyles.has(cursor) && styleChain.length < 20) {
          visitedStyles.add(cursor);
          styleChain.push(cursor);
          const style = cv7991NumberingParagraphStyles.get(cursor);
          if (!style) break;
          if (!numId && style.numId) {
            if (style.numId === '0') return '';
            numId = style.numId;
            if (!ilvl) ilvl = style.ilvl;
          }
          if (!ilvl && style.ilvl) ilvl = style.ilvl;
          cursor = style.basedOn;
        }
        /* Danh sách theo kiểu đoạn do Word tự tạo sau khi nhấn Enter.
           Chỉ chọn khi ánh xạ kiểu đoạn -> numId/ilvl không mơ hồ. */
        if (!numId && styleChain.length) {
          for (const style of styleChain) {
            const candidates = cv7991NumberingStyleLevelLinks.get(style) || [];
            const unique = Array.from(new Map(candidates.map((item) =>
              [`${item.numId}:${item.ilvl}`, item])).values());
            if (unique.length !== 1) continue;
            numId = unique[0].numId;
            if (!ilvl) ilvl = unique[0].ilvl;
            break;
          }
        }
        if (!numId) return '';
        if (!ilvl) ilvl = '0';
        const instance = cv7991NumberingInstances.get(numId);
        if (!instance) return '';
        const levels = cv7991NumberingLevels.get(instance.abstractId);
        const level = (instance.levelOverrides && instance.levelOverrides.get(ilvl))
          || (levels && (levels.get(ilvl) || levels.get('0')));
        /* Giữ cách đọc a/b/c/d trước đây. Chỉ bổ sung numbering decimal
           khi đang ở bên trong một NDTC/Giải NDTC, không làm thay đổi
           các danh sách số thông thường ở những tài liệu Word khác. */
        const numFmt = String(level && level.numFmt || '');
        const isAlphabetic = /^(?:lowerLetter|upperLetter)$/i.test(numFmt);
        const isDecimalNdtc = !!allowNdtcNumber && /^decimal$/i.test(numFmt);
        if (!level || (!isAlphabetic && !isDecimalNdtc)) return '';

        const key = `${numId}:${ilvl}`;
        const initial = instance.startOverrides.has(ilvl)
          ? instance.startOverrides.get(ilvl)
          : Math.max(1, Number(level.start) || 1);
        const current = cv7991NumberingCounters.has(key)
          ? cv7991NumberingCounters.get(key) + 1
          : initial;
        cv7991NumberingCounters.set(key, current);

        const upper = /^upperLetter$/i.test(String(level.numFmt || ''));
        const letter = isDecimalNdtc ? String(current) : cv7991AlphabeticListLabel(current, upper);
        const placeholder = `%${Math.max(1, (parseInt(ilvl, 10) || 0) + 1)}`;
        let prefix = String(level.lvlText || placeholder).split(placeholder).join(letter).trim();
        if (!prefix || /%\d/.test(prefix)) prefix = `${letter})`;
        if (prefix === letter) prefix = `${letter})`;

        /* Không tạo nhãn thứ hai nếu người soạn đã gõ a)/b)/c)/d). */
        if ((isDecimalNdtc && /^\s*[1-4]\s*(?:[)\]:：]|\.(?!\d))/.test(String(visibleText || '')))
          || (!isDecimalNdtc && /^\s*[a-z]\s*[.\)\]:：-]/i.test(String(visibleText || '')))) return '';
        return prefix;
      };

      const cv7991PointSizeFromRunProperties = (rPr) => {
        if (!rPr) return 0;
        const sizeNode = firstChildByLocalName(rPr, 'sz') || firstChildByLocalName(rPr, 'szCs');
        const halfPoints = Number(cv7991WordAttr(sizeNode, 'val') || 0);
        return Number.isFinite(halfPoints) && halfPoints > 0 ? halfPoints / 2 : 0;
      };
      /* Chiều cao ký tự thường lấy từ Normal/docDefaults của chính tệp Word.
         Nếu tài liệu cũ không lưu giá trị này thì dùng chuẩn Word 12 pt. */
      const cv7991NormalCharacterHeightPt = (() => {
        if (!cv7991StylesDoc) return 12;
        const normalStyle = Array.from(cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'style') || []).find((node) => {
          const styleId = String(cv7991WordAttr(node, 'styleId') || '').trim().toLowerCase();
          const isDefault = /^(1|true|on)$/i.test(String(cv7991WordAttr(node, 'default') || ''));
          const type = String(cv7991WordAttr(node, 'type') || '').trim().toLowerCase();
          return styleId === 'normal' || (isDefault && type === 'paragraph');
        });
        const normalSize = cv7991PointSizeFromRunProperties(firstChildByLocalName(normalStyle, 'rPr'));
        if (normalSize > 0) return normalSize;
        const defaultRPr = Array.from(cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'rPrDefault') || [])
          .map((node) => firstChildByLocalName(node, 'rPr'))
          .find(Boolean);
        const defaultSize = cv7991PointSizeFromRunProperties(defaultRPr);
        return defaultSize > 0 ? defaultSize : 12;
      })();
      const cv7991SourcePageGeometry = (() => {
        const section = Array.from(doc.getElementsByTagNameNS(W_NS, 'sectPr')).pop();
        const size = firstChildByLocalName(section, 'pgSz');
        const margins = firstChildByLocalName(section, 'pgMar');
        const pageWidth = Number(cv7991WordAttr(size, 'w'));
        const left = Number(cv7991WordAttr(margins, 'left')) + Number(cv7991WordAttr(margins, 'gutter'));
        const textWidth = pageWidth - left - Number(cv7991WordAttr(margins, 'right'));
        return { width: pageWidth > 0 ? pageWidth / 15 : 640,
          left: left / 15, textWidth: textWidth > 0 ? textWidth / 15 : 640 };
      })();
      const cv7991SourceTextWidthPx = cv7991SourcePageGeometry.textWidth;
      const cv7991SourceParagraphFormat = (node, inherit = false) => {
        let props = firstChildByLocalName(node, 'pPr');
        if (inherit && cv7991StylesDoc) {
          // Floating drawings are positioned relative to real Word paragraphs,
          // including their inherited spacing and empty paragraph marks.
          const layers = [];
          const defaults = cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'pPrDefault')[0];
          layers.push(firstChildByLocalName(defaults, 'pPr'));
          const styles = Array.from(cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'style'));
          let styleId = cv7991WordAttr(firstChildByLocalName(props, 'pStyle'), 'val');
          let style = styles.find((item) => cv7991WordAttr(item, 'styleId') === styleId)
            || styles.find((item) => cv7991WordAttr(item, 'styleId') === 'Normal');
          const chain = [], seen = new Set();
          while (style && !seen.has(style)) {
            seen.add(style);
            chain.unshift(firstChildByLocalName(style, 'pPr'));
            styleId = cv7991WordAttr(firstChildByLocalName(style, 'basedOn'), 'val');
            style = styles.find((item) => cv7991WordAttr(item, 'styleId') === styleId);
          }
          layers.push(...chain, props);
          const merged = doc.createElementNS(W_NS, 'w:pPr');
          layers.filter(Boolean).forEach((layer) => cv7991DirectChildren(layer).forEach((property) => {
            let target = firstChildByLocalName(merged, property.localName);
            if (!target) { target = property.cloneNode(true); merged.appendChild(target); }
            else Array.from(property.attributes).forEach((attr) => target.setAttributeNS(attr.namespaceURI, attr.name, attr.value));
          }));
          props = merged;
        }
        const indent = firstChildByLocalName(props, 'ind');
        const spacing = firstChildByLocalName(props, 'spacing');
        const align = cv7991WordAttr(firstChildByLocalName(props, 'jc'), 'val');
        const size = Array.from(node.getElementsByTagNameNS(W_NS, 'r'))
          .filter((run) => run.getElementsByTagNameNS(W_NS, 't').length)
          .map((run) => cv7991PointSizeFromRunProperties(firstChildByLocalName(run, 'rPr')))
          .find((value) => value > 0) || cv7991NormalCharacterHeightPt;
        return {
          fontSizePx: size * 96 / 72,
          align: ['left', 'right', 'center', 'justify', 'both'].includes(align) ? align : 'left',
          leftPx: Number(cv7991WordAttr(indent, 'left') || cv7991WordAttr(indent, 'start')) / 15,
          rightPx: Number(cv7991WordAttr(indent, 'right') || cv7991WordAttr(indent, 'end')) / 15,
          firstLinePx: (Number(cv7991WordAttr(indent, 'firstLine')) - Number(cv7991WordAttr(indent, 'hanging'))) / 15,
          beforePx: Number(cv7991WordAttr(spacing, 'before')) / 15,
          afterPx: Number(cv7991WordAttr(spacing, 'after')) / 15,
          line: Number(cv7991WordAttr(spacing, 'line')) || 0,
          lineRule: cv7991WordAttr(spacing, 'lineRule') || 'auto'
        };
      };
      const cv7991NormalizeHex = (value) => {
        const raw = String(value || '').replace(/^#/, '').trim().toUpperCase();
        if (/^[0-9A-F]{6}$/.test(raw)) return `#${raw}`;
        if (/^[0-9A-F]{8}$/.test(raw)) return `#${raw.slice(2)}`;
        return '';
      };
      const cv7991ThemeColors = (() => {
        const map = Object.create(null);
        if (!cv7991ThemeDoc) return map;
        const scheme = Array.from(cv7991ThemeDoc.getElementsByTagNameNS('*', 'clrScheme') || [])[0];
        if (!scheme) return map;
        cv7991DirectChildren(scheme).forEach((slot) => {
          const key = String(slot.localName || '').toLowerCase();
          const colorNode = cv7991DirectChildren(slot)[0];
          if (!key || !colorNode) return;
          const raw = colorNode.getAttribute('val') || colorNode.getAttribute('lastClr') || '';
          const color = cv7991NormalizeHex(raw);
          if (color) map[key] = color;
        });
        return map;
      })();
      const cv7991TintShadeColor = (color, tintRaw, shadeRaw) => {
        const normalized = cv7991NormalizeHex(color);
        if (!normalized) return '';
        let channels = [1, 3, 5].map((idx) => parseInt(normalized.slice(idx, idx + 2), 16));
        const shadeText = String(shadeRaw || '').trim();
        if (/^[0-9A-Fa-f]{2}$/.test(shadeText)) {
          const factor = parseInt(shadeText, 16) / 255;
          channels = channels.map((value) => Math.max(0, Math.min(255, Math.round(value * factor))));
        }
        const tintText = String(tintRaw || '').trim();
        if (/^[0-9A-Fa-f]{2}$/.test(tintText)) {
          const factor = parseInt(tintText, 16) / 255;
          channels = channels.map((value) => Math.max(0, Math.min(255, Math.round(value + (255 - value) * factor))));
        }
        return `#${channels.map((value) => value.toString(16).padStart(2, '0')).join('').toUpperCase()}`;
      };
      const cv7991ColorFromWordNode = (node, kind = 'text') => {
        if (!node) return '';
        const isFill = kind === 'fill';
        const directName = isFill ? 'fill' : 'val';
        const themeName = isFill ? 'themeFill' : 'themeColor';
        const tintName = isFill ? 'themeFillTint' : 'themeTint';
        const shadeName = isFill ? 'themeFillShade' : 'themeShade';
        const direct = cv7991NormalizeHex(cv7991WordAttr(node, directName));
        if (direct) return direct;
        const themeKey = String(cv7991WordAttr(node, themeName) || '').trim().toLowerCase();
        const base = cv7991ThemeColors[themeKey] || '';
        return base ? cv7991TintShadeColor(base, cv7991WordAttr(node, tintName), cv7991WordAttr(node, shadeName)) : '';
      };
      const cv7991WordOnOff = (prNode, propertyName) => {
        const node = firstChildByLocalName(prNode, propertyName);
        if (!node) return undefined;
        const raw = String(cv7991WordAttr(node, 'val') || '').trim().toLowerCase();
        if (['0', 'false', 'off', 'none', 'nil'].includes(raw)) return false;
        return true;
      };
      const cv7991RunFormattingFromPr = (rPr) => {
        const result = {};
        if (!rPr) return result;
        const fontSizePt = cv7991PointSizeFromRunProperties(rPr);
        if (fontSizePt > 0) result.fontSizePt = fontSizePt;
        const bold = cv7991WordOnOff(rPr, 'b');
        const boldCs = cv7991WordOnOff(rPr, 'bCs');
        if (bold !== undefined) result.bold = bold;
        else if (boldCs !== undefined) result.bold = boldCs;
        const italic = cv7991WordOnOff(rPr, 'i');
        const italicCs = cv7991WordOnOff(rPr, 'iCs');
        if (italic !== undefined) result.italic = italic;
        else if (italicCs !== undefined) result.italic = italicCs;
        const underlineNode = firstChildByLocalName(rPr, 'u');
        if (underlineNode) {
          const raw = String(cv7991WordAttr(underlineNode, 'val') || 'single').trim().toLowerCase();
          result.underline = !['0', 'false', 'off', 'none', 'nil'].includes(raw);
        }
        const colorNode = firstChildByLocalName(rPr, 'color');
        const color = cv7991ColorFromWordNode(colorNode, 'text');
        if (color) result.color = color;
        return result;
      };
      const cv7991ParagraphFormattingFromPr = (pPr) => {
        const result = {};
        if (!pPr) return result;
        const jc = firstChildByLocalName(pPr, 'jc');
        const raw = String(cv7991WordAttr(jc, 'val') || '').trim().toLowerCase();
        const alignMap = { center: 'center', right: 'right', left: 'left', both: 'justify', distribute: 'justify', start: 'left', end: 'right' };
        if (alignMap[raw]) result.align = alignMap[raw];
        return result;
      };
      const cv7991BorderColor = (node) => {
        if (!node) return '#000000';
        const direct = cv7991NormalizeHex(cv7991WordAttr(node, 'color'));
        if (direct) return direct;
        const themeKey = String(cv7991WordAttr(node, 'themeColor') || '').trim().toLowerCase();
        const base = cv7991ThemeColors[themeKey] || '';
        return base ? cv7991TintShadeColor(base, cv7991WordAttr(node, 'themeTint'), cv7991WordAttr(node, 'themeShade')) : '#000000';
      };
      const cv7991BorderFromNode = (node) => {
        if (!node) return undefined;
        const raw = String(cv7991WordAttr(node, 'val') || 'single').trim().toLowerCase();
        if (['nil', 'none', '0', 'false', 'off'].includes(raw)) return { style: 'hidden', widthPx: 0, color: 'transparent', explicit: true };
        const styleMap = {
          single: 'solid', thick: 'solid', double: 'double', dotted: 'dotted', dashsmallgap: 'dashed',
          dashed: 'dashed', dotdash: 'dashed', dotdotdash: 'dashed', dashdotstroked: 'dashed',
          triple: 'double', wave: 'solid', doublewave: 'double', inset: 'inset', outset: 'outset'
        };
        const style = styleMap[raw] || 'solid';
        const size = Number(cv7991WordAttr(node, 'sz') || 8);
        let widthPx = Number.isFinite(size) && size > 0 ? size / 6 : 1.333;
        if (style === 'double') widthPx = Math.max(3, widthPx);
        widthPx = Math.max(0.67, Math.min(12, widthPx));
        return { style, widthPx, color: cv7991BorderColor(node), explicit: true };
      };
      const cv7991BordersFromPr = (prNode, containerName) => {
        const result = {};
        const container = firstChildByLocalName(prNode, containerName);
        if (!container) return result;
        ['top', 'right', 'bottom', 'left', 'insideH', 'insideV'].forEach((edge) => {
          const borderNode = firstChildByLocalName(container, edge);
          if (borderNode) result[edge] = cv7991BorderFromNode(borderNode);
        });
        return result;
      };
      const cv7991CellFormattingFromPr = (tcPr) => {
        const result = { borders: {} };
        if (!tcPr) return result;
        const shd = firstChildByLocalName(tcPr, 'shd');
        const fillRaw = String(cv7991WordAttr(shd, 'fill') || '').trim().toLowerCase();
        const fill = cv7991ColorFromWordNode(shd, 'fill');
        if (fill) result.fill = fill;
        else if (shd && ['nil', 'none', 'clear'].includes(fillRaw) && !fillRaw.match(/^[0-9a-f]{6}$/i)) result.fill = 'transparent';
        const vAlign = firstChildByLocalName(tcPr, 'vAlign');
        const vertical = String(cv7991WordAttr(vAlign, 'val') || '').trim().toLowerCase();
        if (['top', 'center', 'bottom'].includes(vertical)) result.vAlign = vertical === 'center' ? 'middle' : vertical;
        result.borders = cv7991BordersFromPr(tcPr, 'tcBorders');
        return result;
      };
      const cv7991TableFormattingFromPr = (tblPr) => {
        const result = { borders: {} };
        if (!tblPr) return result;
        result.borders = cv7991BordersFromPr(tblPr, 'tblBorders');
        const rowBand = firstChildByLocalName(tblPr, 'tblStyleRowBandSize');
        const colBand = firstChildByLocalName(tblPr, 'tblStyleColBandSize');
        const rowBandSize = parseInt(cv7991WordAttr(rowBand, 'val') || '0', 10);
        const colBandSize = parseInt(cv7991WordAttr(colBand, 'val') || '0', 10);
        if (Number.isFinite(rowBandSize) && rowBandSize > 0) result.rowBandSize = rowBandSize;
        if (Number.isFinite(colBandSize) && colBandSize > 0) result.colBandSize = colBandSize;
        return result;
      };
      const cv7991MergeFormatting = (target, source) => {
        const out = target || {};
        const extra = source || {};
        ['bold', 'italic', 'underline', 'color', 'fontSizePt', 'align', 'fill', 'vAlign', 'rowBandSize', 'colBandSize'].forEach((key) => {
          if (extra[key] !== undefined && extra[key] !== '') out[key] = extra[key];
        });
        if (extra.borders) out.borders = Object.assign({}, out.borders || {}, extra.borders);
        if (extra.run) out.run = cv7991MergeFormatting(Object.assign({}, out.run || {}), extra.run);
        if (extra.para) out.para = cv7991MergeFormatting(Object.assign({}, out.para || {}), extra.para);
        if (extra.cell) out.cell = cv7991MergeFormatting(Object.assign({ borders: {} }, out.cell || {}), extra.cell);
        if (extra.table) out.table = cv7991MergeFormatting(Object.assign({ borders: {} }, out.table || {}), extra.table);
        return out;
      };
      const cv7991StyleFragmentFromNode = (node) => {
        const rPr = firstChildByLocalName(node, 'rPr');
        const pPr = firstChildByLocalName(node, 'pPr');
        const tcPr = firstChildByLocalName(node, 'tcPr');
        const tblPr = firstChildByLocalName(node, 'tblPr');
        return {
          run: cv7991RunFormattingFromPr(rPr),
          para: cv7991ParagraphFormattingFromPr(pPr),
          cell: cv7991CellFormattingFromPr(tcPr),
          table: cv7991TableFormattingFromPr(tblPr),
        };
      };
      const cv7991TableStyleNodes = (() => {
        const map = Object.create(null);
        if (!cv7991StylesDoc) return map;
        Array.from(cv7991StylesDoc.getElementsByTagNameNS(W_NS, 'style') || []).forEach((styleNode) => {
          const type = String(cv7991WordAttr(styleNode, 'type') || '').trim().toLowerCase();
          const id = String(cv7991WordAttr(styleNode, 'styleId') || '').trim();
          if (type === 'table' && id) map[id] = styleNode;
        });
        return map;
      })();
      const cv7991TableStyleChain = (styleId) => {
        const output = [];
        const seen = new Set();
        const visit = (id) => {
          const key = String(id || '').trim();
          if (!key || seen.has(key)) return;
          seen.add(key);
          const node = cv7991TableStyleNodes[key];
          if (!node) return;
          const basedOn = firstChildByLocalName(node, 'basedOn');
          const parentId = String(cv7991WordAttr(basedOn, 'val') || '').trim();
          if (parentId) visit(parentId);
          output.push(node);
        };
        visit(styleId);
        return output;
      };
      const cv7991ResolveTableStyle = (styleId) => {
        const base = { run: {}, para: {}, cell: { borders: {} }, table: { borders: {} } };
        const conditional = Object.create(null);
        const chain = cv7991TableStyleChain(styleId);
        chain.forEach((styleNode) => {
          cv7991MergeFormatting(base, cv7991StyleFragmentFromNode(styleNode));
          cv7991DirectChildren(styleNode, 'tblStylePr').forEach((conditionalNode) => {
            const type = String(cv7991WordAttr(conditionalNode, 'type') || '').trim();
            if (!type) return;
            if (!conditional[type]) conditional[type] = { run: {}, para: {}, cell: { borders: {} }, table: { borders: {} } };
            cv7991MergeFormatting(conditional[type], cv7991StyleFragmentFromNode(conditionalNode));
          });
        });
        if (conditional.wholeTable) cv7991MergeFormatting(base, conditional.wholeTable);
        return { found: chain.length > 0, base, conditional };
      };
      const cv7991TableLook = (tblPr) => {
        const node = firstChildByLocalName(tblPr, 'tblLook');
        const maskRaw = String(cv7991WordAttr(node, 'val') || '').trim();
        const mask = /^[0-9a-f]+$/i.test(maskRaw) ? parseInt(maskRaw, 16) : 0;
        const read = (name, bit, fallback = false) => {
          const raw = node ? String(cv7991WordAttr(node, name) || '').trim().toLowerCase() : '';
          if (raw) return !['0', 'false', 'off', 'none', 'nil'].includes(raw);
          return mask ? !!(mask & bit) : fallback;
        };
        return {
          firstRow: read('firstRow', 0x20, false),
          lastRow: read('lastRow', 0x40, false),
          firstColumn: read('firstColumn', 0x80, false),
          lastColumn: read('lastColumn', 0x100, false),
          noHBand: read('noHBand', 0x200, false),
          noVBand: read('noVBand', 0x400, false),
        };
      };
      const cv7991UnicodeScriptText = (text, tag) => {
        const subMap = { '0': '₀', '1': '₁', '2': '₂', '3': '₃', '4': '₄', '5': '₅', '6': '₆', '7': '₇', '8': '₈', '9': '₉', '+': '₊', '-': '₋', '=': '₌', '(': '₍', ')': '₎' };
        const supMap = { '0': '⁰', '1': '¹', '2': '²', '3': '³', '4': '⁴', '5': '⁵', '6': '⁶', '7': '⁷', '8': '⁸', '9': '⁹', '+': '⁺', '-': '⁻', '=': '⁼', '(': '⁽', ')': '⁾', 'o': 'ᵒ', 'O': 'ᴼ' };
        const map = String(tag || '').toLowerCase() === 'sup' ? supMap : subMap;
        return String(text || '').replace(/[0-9+\-=()oO]/g, (ch) => map[ch] || ch);
      };
      const cv7991ScriptTag = (text, tag, scriptContext) => {
        const value = String(text || '');
        if (!value) return '';
        if (scriptContext) return cv7991UnicodeScriptText(value, tag);
        return `<${tag}>${value}</${tag}>`;
      };
      const ommlText = (node, scriptContext = '') => {
        if (!node) return '';
        if (node.nodeType === Node.TEXT_NODE) return node.nodeValue || '';
        if (node.nodeType !== Node.ELEMENT_NODE) return '';
        const local = String(node.localName || '').toLowerCase();
        if (local === 't') return node.textContent || '';
        if (local === 'sSub'.toLowerCase()) {
          const base = ommlText(firstChildByLocalName(node, 'e'), scriptContext);
          const sub = ommlText(firstChildByLocalName(node, 'sub'), 'subscript');
          return `${base}${cv7991ScriptTag(sub, 'sub', scriptContext)}`;
        }
        if (local === 'sSup'.toLowerCase()) {
          const base = ommlText(firstChildByLocalName(node, 'e'), scriptContext);
          const sup = ommlText(firstChildByLocalName(node, 'sup'), 'superscript');
          return `${base}${cv7991ScriptTag(sup, 'sup', scriptContext)}`;
        }
        if (local === 'ssubsup') {
          const base = ommlText(firstChildByLocalName(node, 'e'), scriptContext);
          const sub = ommlText(firstChildByLocalName(node, 'sub'), 'subscript');
          const sup = ommlText(firstChildByLocalName(node, 'sup'), 'superscript');
          return `${base}${cv7991ScriptTag(sup, 'sup', scriptContext)}${cv7991ScriptTag(sub, 'sub', scriptContext)}`;
        }
        if (local === 'f') {
          const num = ommlText(firstChildByLocalName(node, 'num'), scriptContext);
          const den = ommlText(firstChildByLocalName(node, 'den'), scriptContext);
          return den ? `${num}/${den}` : num;
        }
        return Array.from(node.childNodes || []).map((child) => ommlText(child, scriptContext)).join('');
      };
      const runVerticalAlign = (runNode) => {
        const rPr = firstChildByLocalName(runNode, 'rPr');
        if (!rPr) return '';
        const children = Array.from(rPr.childNodes || []).filter((child) => child && child.nodeType === Node.ELEMENT_NODE);
        const byName = (name) => children.find((child) => String(child.localName || '').toLowerCase() === String(name || '').toLowerCase()) || null;
        const readVal = (node) => node
          ? (node.getAttributeNS(W_NS, 'val') || node.getAttribute('w:val') || node.getAttribute('val') || '')
          : '';
        const value = String(readVal(byName('vertalign')) || '');
        if (/superscript/i.test(value)) return 'sup';
        if (/subscript/i.test(value)) return 'sub';

        /* Word có hai cách lưu chỉ số. Câu 50 dùng w:vertAlign chuẩn, còn Câu 51
           dùng kiểu tương thích cũ: chữ số được thu nhỏ bằng w:sz và hạ bằng
           w:position âm. Chỉ nhận kiểu cũ khi run thật sự nhỏ (không quá 10 pt)
           và nội dung có hình dạng chỉ số, tránh làm lệch văn bản thông thường. */
        const position = Number(readVal(byName('position')));
        const size = Number(readVal(byName('sz')) || readVal(byName('szcs')));
        const runText = Array.from(runNode.getElementsByTagNameNS(W_NS, 't') || [])
          .map((node) => String(node.textContent || ''))
          .join('')
          .trim();
        const scriptLike = !!runText && /^[A-Za-z0-9()+\-=.,]+$/.test(runText);
        if (scriptLike && Number.isFinite(position) && position !== 0
          && Number.isFinite(size) && size > 0 && size <= 20) {
          return position < 0 ? 'sub' : 'sup';
        }
        return '';
      };
      const mathPlaceholderForNode = (node) => {
        const local = String(node && node.localName || '').toLowerCase();
        const sourceNode = local === 'omathpara' ? (firstChildByLocalName(node, 'oMath') || node) : node;
        let rawXml = '';
        try {
          rawXml = (typeof XMLSerializer !== 'undefined' && sourceNode) ? new XMLSerializer().serializeToString(sourceNode) : '';
        } catch (_) {
          rawXml = '';
        }
        const displayText = ommlText(sourceNode || node).replace(/\s+/g, ' ').trim();
        if (!rawXml) return displayText || ommlText(node);
        equationIndex += 1;
        const equationId = `omml_${equationIndex}`;
        equationMap[equationId] = {
          id: equationId,
          xml: rawXml,
          text: displayText,
          type: 'omml',
          isBlock: local === 'omathpara',
          sourceCharacterHeightPt: cv7991NormalCharacterHeightPt,
        };
        return ` ${cv7991EquationPlaceholderToken(equationId)} `;
      };
      const cv7991WordSymbolText = (symNode) => {
        if (!symNode) return '';
        const charRaw = String(symNode.getAttributeNS(W_NS, 'char') || symNode.getAttribute('w:char') || symNode.getAttribute('char') || '').trim().toUpperCase().replace(/^0X/, '');
        const font = String(symNode.getAttributeNS(W_NS, 'font') || symNode.getAttribute('w:font') || symNode.getAttribute('font') || '').trim().toLowerCase();
        const lastByte = charRaw.length >= 2 ? charRaw.slice(-2) : charRaw;
        const symbolMap = {
          'F020': ' ', '0020': ' ', '20': ' ',
          'F0AE': '→', '00AE': '→', 'AE': '→',
          'F0AC': '←', '00AC': '←', 'AC': '←',
          'F0AD': '↑', '00AD': '↑', 'AD': '↑',
          'F0AF': '↓', '00AF': '↓', 'AF': '↓',
          'F0B1': '±', '00B1': '±', 'B1': '±',
          'F0B4': '×', '00B4': '×', 'B4': '×',
          'F0B8': '÷', '00B8': '÷', 'B8': '÷',
          'F0BE': '─', '00BE': '─', 'BE': '─'
        };
        if (symbolMap[charRaw]) return symbolMap[charRaw];
        if (/symbol/.test(font) && symbolMap[lastByte]) return symbolMap[lastByte];
        const code = parseInt(charRaw, 16);
        if (Number.isFinite(code) && code > 0 && code <= 0x10FFFF && code < 0xE000) {
          try { return String.fromCodePoint(code); } catch (_) {}
        }
        return '';
      };
      const runStyleInfo = (runNode) => {
        const info = { red: false, green: false, underline: false, fontSizePt: 0 };
        const rPr = firstChildByLocalName(runNode, 'rPr');
        if (!rPr) return info;
        info.fontSizePt = cv7991PointSizeFromRunProperties(rPr);
        const underlineNode = Array.from(rPr.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === 'u');
        if (underlineNode) {
          const val = String(underlineNode.getAttributeNS(W_NS, 'val') || underlineNode.getAttribute('w:val') || underlineNode.getAttribute('val') || '').trim().toLowerCase();
          if (!val || !['none', '0', 'false'].includes(val)) info.underline = true;
        }
        const highlightNode = Array.from(rPr.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === 'highlight');
        if (highlightNode) {
          const val = String(highlightNode.getAttributeNS(W_NS, 'val') || highlightNode.getAttribute('w:val') || highlightNode.getAttribute('val') || '').trim().toLowerCase();
          if (val === 'red') info.red = true;
          if (['green', 'brightgreen', 'darkgreen'].includes(val.replace(/[^a-z]/g, ''))) info.green = true;
        }
        const colorNode = Array.from(rPr.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === 'color');
        if (colorNode) {
          const val = String(colorNode.getAttributeNS(W_NS, 'val') || colorNode.getAttribute('w:val') || colorNode.getAttribute('val') || '').replace(/^#/, '').trim();
          const themeColor = String(colorNode.getAttributeNS(W_NS, 'themeColor') || colorNode.getAttribute('w:themeColor') || colorNode.getAttribute('themeColor') || '').trim().toLowerCase();
          const resolved = String(cv7991ColorFromWordNode(colorNode, 'text') || val || '').replace(/^#/, '').trim().toUpperCase();
          const directHex = val.toUpperCase();
          if (/red|accent2|hyperlink/i.test(themeColor) && !/followed/i.test(themeColor)) info.red = true;
          if (/green/i.test(themeColor)) info.green = true;
          const inspectHex = (hex) => {
            let normalizedHex = String(hex || '').trim().toUpperCase().replace(/^#/, '');
            if (/^[0-9A-F]{8}$/.test(normalizedHex)) normalizedHex = normalizedHex.slice(-6);
            if (!/^[0-9A-F]{6}$/.test(normalizedHex)) return;
            const r = parseInt(normalizedHex.slice(0, 2), 16);
            const g = parseInt(normalizedHex.slice(2, 4), 16);
            const b = parseInt(normalizedHex.slice(4, 6), 16);
            if (r >= 150 && g <= 120 && b <= 120 && r >= g + 40 && r >= b + 40) info.red = true;
            /* Bốn màu giáo viên dùng để đánh dấu đáp án đúng trong Word:
               92D050, 00B050, 00B0F0 và 0070C0. Giữ thêm nhận diện các sắc
               xanh lá cũ để không làm mất tương thích với tài liệu trước đây. */
            if (['92D050', '00B050', '00B0F0', '0070C0'].includes(normalizedHex)
              || (g >= 90 && g >= r + 20 && g >= b + 15)) info.green = true;
          };
          inspectHex(directHex);
          inspectHex(resolved);
        }
        return info;
      };
      const mergeRunStyle = (base, extra) => ({
        red: !!(base && base.red) || !!(extra && extra.red),
        green: !!(base && base.green) || !!(extra && extra.green),
        underline: !!(base && base.underline) || !!(extra && extra.underline),
        fontSizePt: Number(extra && extra.fontSizePt) > 0
          ? Number(extra.fontSizePt)
          : (Number(base && base.fontSizePt) > 0 ? Number(base.fontSizePt) : cv7991NormalCharacterHeightPt)
      });
      const textPart = (text, style) => {
        const value = String(text || '');
        if (!value) return [];
        return [{
          text: value,
          red: !!(style && style.red),
          green: !!(style && style.green),
          underline: !!(style && style.underline)
        }];
      };

      // Word 2010+ lưu bảng biến thiên và nhiều sơ đồ dưới dạng DrawingML Group
      // (wpg:wgp) kèm một nhánh VML dự phòng. Bộ đọc cũ đi xuyên cả hai nhánh,
      // vì vậy công thức bị lặp đôi và các đường/ký hiệu của bảng bị mất. Ta đọc đúng
      // một nhánh DrawingML rồi giữ toàn bộ nhóm như một hình vector có cấu trúc.
      const cv7991DescendantsByLocalName = (node, localName) => {
        const wanted = String(localName || '').toLowerCase();
        return Array.from(node && node.getElementsByTagName ? node.getElementsByTagName('*') : [])
          .filter((child) => String(child && child.localName || '').toLowerCase() === wanted);
      };
      const cv7991FirstDescendantByLocalName = (node, localName) => cv7991DescendantsByLocalName(node, localName)[0] || null;
      const cv7991NumberAttr = (node, name, fallback = 0) => {
        if (!node || !node.getAttribute) return Number(fallback) || 0;
        const raw = node.getAttribute(name) || node.getAttribute(`a:${name}`) || node.getAttribute(`wp:${name}`) || '';
        const value = Number(raw);
        return Number.isFinite(value) ? value : (Number(fallback) || 0);
      };
      const cv7991DrawingGroupNode = (drawingNode) => {
        if (!drawingNode) return null;
        const nodes = cv7991DescendantsByLocalName(drawingNode, 'wgp');
        return nodes.find((item) => /wordprocessinggroup/i.test(String(item.namespaceURI || ''))) || null;
      };
      const cv7991DrawingSingleShapeNode = (drawingNode) => {
        if (!drawingNode) return null;
        const nodes = cv7991DescendantsByLocalName(drawingNode, 'wsp');
        return nodes.find((item) => /wordprocessingShape/i.test(String(item.namespaceURI || '')))
          || nodes[0]
          || null;
      };
      const cv7991GroupXfrm = (groupNode) => {
        const groupPr = cv7991DirectChildren(groupNode).find((child) => String(child.localName || '').toLowerCase() === 'grpsppr');
        const xfrm = groupPr ? cv7991DirectChildren(groupPr, 'xfrm')[0] : null;
        const off = xfrm ? cv7991DirectChildren(xfrm, 'off')[0] : null;
        const ext = xfrm ? cv7991DirectChildren(xfrm, 'ext')[0] : null;
        const chOff = xfrm ? cv7991DirectChildren(xfrm, 'choff')[0] : null;
        const chExt = xfrm ? cv7991DirectChildren(xfrm, 'chext')[0] : null;
        const extX = Math.abs(cv7991NumberAttr(ext, 'cx', 1)) || 1;
        const extY = Math.abs(cv7991NumberAttr(ext, 'cy', 1)) || 1;
        const childExtX = Math.abs(cv7991NumberAttr(chExt, 'cx', extX)) || extX;
        const childExtY = Math.abs(cv7991NumberAttr(chExt, 'cy', extY)) || extY;
        return {
          offX: cv7991NumberAttr(off, 'x', 0),
          offY: cv7991NumberAttr(off, 'y', 0),
          extX,
          extY,
          childOffX: cv7991NumberAttr(chOff, 'x', 0),
          childOffY: cv7991NumberAttr(chOff, 'y', 0),
          childExtX,
          childExtY,
        };
      };
      const cv7991ComposeAxisMap = (parent, local) => ({
        sx: (Number(parent && parent.sx) || 1) * (Number(local && local.sx) || 1),
        sy: (Number(parent && parent.sy) || 1) * (Number(local && local.sy) || 1),
        tx: (Number(parent && parent.sx) || 1) * (Number(local && local.tx) || 0) + (Number(parent && parent.tx) || 0),
        ty: (Number(parent && parent.sy) || 1) * (Number(local && local.ty) || 0) + (Number(parent && parent.ty) || 0),
      });
      const cv7991MapGroupPoint = (mapping, x, y) => ({
        x: (Number(mapping && mapping.sx) || 1) * (Number(x) || 0) + (Number(mapping && mapping.tx) || 0),
        y: (Number(mapping && mapping.sy) || 1) * (Number(y) || 0) + (Number(mapping && mapping.ty) || 0),
      });
      const cv7991ShapeXfrm = (shapeNode) => {
        const spPr = cv7991DirectChildren(shapeNode).find((child) => String(child.localName || '').toLowerCase() === 'sppr');
        const xfrm = spPr ? cv7991DirectChildren(spPr, 'xfrm')[0] : null;
        const off = xfrm ? cv7991DirectChildren(xfrm, 'off')[0] : null;
        const ext = xfrm ? cv7991DirectChildren(xfrm, 'ext')[0] : null;
        return {
          x: cv7991NumberAttr(off, 'x', 0),
          y: cv7991NumberAttr(off, 'y', 0),
          width: Math.abs(cv7991NumberAttr(ext, 'cx', 0)),
          height: Math.abs(cv7991NumberAttr(ext, 'cy', 0)),
          flipH: /^(1|true)$/i.test(String(xfrm && xfrm.getAttribute('flipH') || '')),
          flipV: /^(1|true)$/i.test(String(xfrm && xfrm.getAttribute('flipV') || '')),
          rotation: cv7991NumberAttr(xfrm, 'rot', 0) / 60000,
          spPr,
        };
      };
      const cv7991WordGroupRelationId = (shapeNode) => {
        const elements = [shapeNode].concat(Array.from(shapeNode && shapeNode.getElementsByTagName ? shapeNode.getElementsByTagName('*') : []));
        for (const element of elements) {
          const relId = cv7991RelationIdFromElement(element);
          if (relId && imageMap && imageMap[relId]) return relId;
        }
        return '';
      };
      const cv7991WordGroupOleInfo = (shapeNode) => {
        const ole = cv7991DescendantsByLocalName(shapeNode, 'oleobject')[0] || null;
        const progId = ole ? String(ole.getAttribute('ProgID') || ole.getAttribute('o:ProgID') || ole.getAttribute('progID') || '') : '';
        return { progId, isFormula: /Equation|MathType|DSMT/i.test(progId) };
      };
      const cv7991WordGroupText = (shapeNode) => cv7991DescendantsByLocalName(shapeNode, 't')
        /* Text Box trong nhóm Shapes có thể được DOMParser trả về với namespace
           Word đầy đủ hoặc chỉ giữ localName sau khi drawing được bọc tạm để
           dùng chung bộ đọc. Trong phạm vi một wps:wsp, mọi thẻ t đều là chữ
           của chính Shape; không loại chúng chỉ vì namespace bị rút gọn. */
        .map((item) => String(item.textContent || ''))
        .join('')
        .replace(/\u00a0/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
      const cv7991WordGroupFontSize = (shapeNode, boxHeight, rootUnitPerEmu) => {
        const sizeNode = cv7991DescendantsByLocalName(shapeNode, 'sz')[0] || null;
        const halfPoints = Number(cv7991WordAttr(sizeNode, 'val') || 0);
        const pointSize = Number.isFinite(halfPoints) && halfPoints > 0 ? halfPoints / 2 : 0;
        if (pointSize > 0 && rootUnitPerEmu > 0) return Math.max(8, pointSize * 12700 * rootUnitPerEmu);
        return Math.max(10, (Number(boxHeight) || 40) * 0.62);
      };
      const cv7991WordGroupTextColor = (shapeNode) => {
        /* Màu chữ của Text Box Word phải lấy từ w:rPr/w:color. Không dùng
           a:fontRef của style Shape làm màu mặc định: nhiều file (trong đó có
           tám nhãn A--K của Câu 4) lưu fontRef=lt1 nhưng Word vẫn kế thừa
           chữ đen từ đoạn văn. Nếu lấy lt1, chữ được dựng thành trắng trên
           nền trắng và trông như bị mất hoàn toàn. */
        const colorNode = cv7991DescendantsByLocalName(shapeNode, 'color')
          .find((item) => /wordprocessingml/i.test(String(item && item.namespaceURI || '')))
          || null;
        const raw = String(cv7991WordAttr(colorNode, 'val') || '')
          .replace(/^#/, '').trim();
        if (/^[0-9a-f]{6}$/i.test(raw)) return `#${raw}`;
        const themeKey = String(cv7991WordAttr(colorNode, 'themeColor') || '')
          .trim().toLowerCase();
        const themeValue = themeKey && cv7991ThemeColors
          ? String(cv7991ThemeColors[themeKey] || '') : '';
        if (/^#[0-9a-f]{6}$/i.test(themeValue)) return themeValue;
        return '#111111';
      };
      const cv7991WordSingleShapeDataFromDrawing = (drawingNode) => {
        const shapeNode = cv7991DrawingSingleShapeNode(drawingNode);
        if (!shapeNode) return null;

        const shapeTransform = cv7991ShapeXfrm(shapeNode);
        const display = cv7991ImageDisplaySizeFromNode(drawingNode);
        const displayWidthPt = Number(display && display.widthPt) > 0
          ? Number(display.widthPt)
          : (Number(shapeTransform.width) > 0 ? Number(shapeTransform.width) / 12700 : 0);
        const displayHeightPt = Number(display && display.heightPt) > 0
          ? Number(display.heightPt)
          : (Number(shapeTransform.height) > 0 ? Number(shapeTransform.height) / 12700 : 0);
        const width = Math.max(1,
          Number(shapeTransform.width) > 0
            ? Number(shapeTransform.width) / 9525
            : displayWidthPt * 96 / 72
        );
        const height = Math.max(1,
          Number(shapeTransform.height) > 0
            ? Number(shapeTransform.height) / 9525
            : displayHeightPt * 96 / 72
        );

        const geometryApi = window.mvipOfficeDrawingGeometry || null;
        let plan = null;
        if (geometryApi && typeof geometryApi.shapePlanFromNode === 'function') {
          try {
            plan = geometryApi.shapePlanFromNode(shapeNode, cv7991ThemeColors);
          } catch (_) {
            plan = null;
          }
        }
        let shapeXml = '';
        try { shapeXml = new XMLSerializer().serializeToString(shapeNode); } catch (_) {}
        if (!plan && !shapeXml) return null;

        /* wp:extent mới là hộp Word đặt trên trang. Một số file để a:ext bằng
           0 hoặc dùng hệ tọa độ khác; ép bộ dựng vector dùng đúng hộp hiển thị
           để Shape không biến mất và không bị đổi tỷ lệ khi sang trình chiếu. */
        if (plan) {
          plan.geometryWidthPx = width;
          plan.geometryHeightPx = height;
        }
        const docProperties = cv7991DescendantsByLocalName(drawingNode, 'docpr')[0] || null;
        const label = String(docProperties && (
          docProperties.getAttribute('descr')
          || docProperties.getAttribute('title')
          || docProperties.getAttribute('name')
        ) || 'Hình vẽ Shapes từ Word').trim();

        return {
          viewBox: { x: 0, y: 0, width, height },
          shapes: [{
            type: 'officeShape',
            x: 0,
            y: 0,
            width,
            height,
            plan,
            shapeXml,
            themeColors: Object.assign({}, cv7991ThemeColors || {}),
            label,
          }],
          displayWidthPt: displayWidthPt > 0 ? displayWidthPt : width * 72 / 96,
          displayHeightPt: displayHeightPt > 0 ? displayHeightPt : height * 72 / 96,
        };
      };
      const cv7991WordGroupDataFromDrawing = (drawingNode) => {
        const rootGroup = cv7991DrawingGroupNode(drawingNode);
        if (!rootGroup) return cv7991WordSingleShapeDataFromDrawing(drawingNode);
        const rootXfrm = cv7991GroupXfrm(rootGroup);
        const viewBox = {
          x: rootXfrm.childOffX,
          y: rootXfrm.childOffY,
          width: Math.max(1, rootXfrm.childExtX),
          height: Math.max(1, rootXfrm.childExtY),
        };
        const display = cv7991ImageDisplaySizeFromNode(drawingNode);
        const displayWidthPt = Number(display && display.widthPt) > 0 ? Number(display.widthPt) : (rootXfrm.extX / 12700);
        const displayHeightPt = Number(display && display.heightPt) > 0 ? Number(display.heightPt) : (rootXfrm.extY / 12700);
        const emuPerRootUnitX = rootXfrm.extX / Math.max(1, rootXfrm.childExtX);
        const emuPerRootUnitY = rootXfrm.extY / Math.max(1, rootXfrm.childExtY);
        const rootUnitPerEmu = 1 / Math.max(1, (emuPerRootUnitX + emuPerRootUnitY) / 2);
        const shapes = [];
        const walkGroup = (groupNode, parentMap, isRoot = false) => {
          let currentMap = parentMap;
          if (!isRoot) {
            const gx = cv7991GroupXfrm(groupNode);
            const localMap = {
              sx: gx.extX / Math.max(1, gx.childExtX),
              sy: gx.extY / Math.max(1, gx.childExtY),
              tx: gx.offX - gx.childOffX * (gx.extX / Math.max(1, gx.childExtX)),
              ty: gx.offY - gx.childOffY * (gx.extY / Math.max(1, gx.childExtY)),
            };
            currentMap = cv7991ComposeAxisMap(parentMap, localMap);
          }
          cv7991DirectChildren(groupNode).forEach((child) => {
            const local = String(child.localName || '').toLowerCase();
            if (local === 'grpsp') {
              walkGroup(child, currentMap, false);
              return;
            }
            if (local !== 'wsp') return;
            const sx = cv7991ShapeXfrm(child);
            if (!(sx.width > 0 || sx.height > 0)) return;
            const p1 = cv7991MapGroupPoint(currentMap, sx.x, sx.y);
            const p2 = cv7991MapGroupPoint(currentMap, sx.x + sx.width, sx.y + sx.height);
            const x = Math.min(p1.x, p2.x);
            const y = Math.min(p1.y, p2.y);
            const width = Math.max(0.5, Math.abs(p2.x - p1.x));
            const height = Math.max(0.5, Math.abs(p2.y - p1.y));
            const geometry = sx.spPr ? cv7991DirectChildren(sx.spPr, 'prstgeom')[0] : null;
            const preset = String(geometry && geometry.getAttribute('prst') || '').toLowerCase();
            if (preset === 'line') {
              let lx1 = sx.x;
              let ly1 = sx.y;
              let lx2 = sx.x + sx.width;
              let ly2 = sx.y + sx.height;
              if (sx.flipH) [lx1, lx2] = [lx2, lx1];
              if (sx.flipV) [ly1, ly2] = [ly2, ly1];
              const a = cv7991MapGroupPoint(currentMap, lx1, ly1);
              const b = cv7991MapGroupPoint(currentMap, lx2, ly2);
              const ln = sx.spPr ? cv7991DirectChildren(sx.spPr, 'ln')[0] : null;
              const colorNode = ln ? cv7991FirstDescendantByLocalName(ln, 'srgbclr') : null;
              const colorRaw = String(colorNode && colorNode.getAttribute('val') || '000000').replace(/^#/, '');
              const color = /^[0-9a-f]{6}$/i.test(colorRaw) ? `#${colorRaw}` : '#000000';
              const widthEmu = Number(ln && ln.getAttribute('w') || 9525) || 9525;
              /* stroke-width của SVG dùng hệ tọa độ viewBox của nhóm, không
                 phải pixel màn hình. Giới hạn cũ 28 làm đường EK/FH chỉ còn
                 vài phần nghìn pixel trong nhóm có viewBox hàng triệu đơn vị. */
              const referenceExtent = Math.max(1, Math.min(viewBox.width, viewBox.height));
              const naturalStrokeWidth = widthEmu * rootUnitPerEmu;
              const strokeWidth = Math.max(
                referenceExtent * .0005,
                Math.min(referenceExtent * .08,
                  naturalStrokeWidth > 0 ? naturalStrokeWidth : referenceExtent * .0015)
              );
              const head = ln ? cv7991DirectChildren(ln, 'headend')[0] : null;
              const tail = ln ? cv7991DirectChildren(ln, 'tailend')[0] : null;
              const headType = String(head && head.getAttribute('type') || '').toLowerCase();
              const tailType = String(tail && tail.getAttribute('type') || '').toLowerCase();
              shapes.push({
                type: 'line', x1: a.x, y1: a.y, x2: b.x, y2: b.y,
                stroke: color, strokeWidth,
                startArrow: !!headType && !['none', ''].includes(headType),
                endArrow: !!tailType && !['none', ''].includes(tailType),
              });
              return;
            }
            const relId = cv7991WordGroupRelationId(child);
            const ole = cv7991WordGroupOleInfo(child);
            if (relId) {
              if (ole.isFormula && imageMap[relId]) {
                imageMap[relId].isMathTypeFormula = true;
                imageMap[relId].presenterFormula = true;
                imageMap[relId].oleProgId = ole.progId || 'Equation';
              }
              shapes.push({ type: 'image', imageId: relId, x, y, width, height, formula: !!ole.isFormula });
              return;
            }
            const geometryApi = window.mvipOfficeDrawingGeometry || null;
            let plan = null;
            if (geometryApi && typeof geometryApi.shapePlanFromNode === 'function') {
              try {
                plan = geometryApi.shapePlanFromNode(child, cv7991ThemeColors);
              } catch (_) {
                plan = null;
              }
            }
            const text = cv7991WordGroupText(child)
              || (plan && Array.isArray(plan.textLines)
                ? plan.textLines.map((line) => String(line || '')).join(' ').trim()
                : '');
            if (text) {
              const pointSize = Number(plan && plan.fontSizePt) > 0
                ? Number(plan.fontSizePt) : 0;
              shapes.push({
                type: 'text', text, x, y, width, height,
                fontSize: pointSize > 0
                  ? Math.max(8, pointSize * 12700 * rootUnitPerEmu)
                  : cv7991WordGroupFontSize(child, height, rootUnitPerEmu),
                fill: cv7991WordGroupTextColor(child),
              });
              return;
            }
            /* Khung chữ nhật, hình thoi, elip và các Shape không chứa chữ
               vẫn là thành phần nhìn thấy của sơ đồ. Bộ cũ chỉ giữ line và
               textbox nên hình Câu 4 mất cả khung ngoài lẫn hình thoi. Dùng
               chung bộ hình học Office để mọi preset/custom geometry được
               dựng như shape độc lập, không viết riêng theo từng tài liệu. */
            let shapeXml = '';
            try { shapeXml = new XMLSerializer().serializeToString(child); } catch (_) {}
            if (!plan && !shapeXml) return;
            if (plan) {
              plan.geometryWidthPx = width;
              plan.geometryHeightPx = height;
            }
            const properties = cv7991DescendantsByLocalName(child, 'cnvpr')[0] || null;
            const label = String(properties && (
              properties.getAttribute('descr')
              || properties.getAttribute('title')
              || properties.getAttribute('name')
            ) || 'Thành phần Shapes trong nhóm Word').trim();
            shapes.push({
              type: 'officeShape', x, y, width, height,
              plan,
              shapeXml,
              themeColors: Object.assign({}, cv7991ThemeColors || {}),
              label,
            });
          });
        };
        walkGroup(rootGroup, { sx: 1, sy: 1, tx: 0, ty: 0 }, true);
        if (!shapes.length) return null;
        return { viewBox, shapes, displayWidthPt, displayHeightPt };
      };
      const cv7991WordGroupPlaceholderForDrawing = (drawingNode, characterHeightPt = cv7991NormalCharacterHeightPt) => {
        const groupData = cv7991WordGroupDataFromDrawing(drawingNode);
        if (!groupData) return '';
        wordGroupIndex += 1;
        const id = `word_group_${wordGroupIndex}`;
        imageMap[id] = {
          relId: id,
          path: `word/generated/${id}.svg`,
          mimeType: 'image/svg+xml',
          displayWidthPt: groupData.displayWidthPt,
          displayHeightPt: groupData.displayHeightPt,
          sourceDisplayWidthPt: groupData.displayWidthPt,
          sourceDisplayHeightPt: groupData.displayHeightPt,
          wordCharacterHeightPt: Math.max(6,
            Number(characterHeightPt) > 0 ? Number(characterHeightPt) : cv7991NormalCharacterHeightPt
          ),
          wordGroupData: groupData,
          sourceAnchor: cv7991QuestionDrawingAnchor(drawingNode),
          isWordGroupFigure: true,
        };
        return cv7991ImagePlaceholderToken(id);
      };

      const cv7991TextBoxTablePlaceholderForDrawing = (drawingNode) => {
        if (!drawingNode) return '';
        const txbxContent = cv7991DescendantsByLocalName(drawingNode, 'txbxcontent')[0] || null;
        if (!txbxContent) return '';
        const tableNode = cv7991DirectChildren(txbxContent, 'tbl')[0]
          || cv7991DescendantsByLocalName(txbxContent, 'tbl')[0]
          || null;
        if (!tableNode) return '';
        tableIndex += 1;
        const tableId = `tbl_${tableIndex}`;
        const tableData = tableToData(tableNode, tableId, { textBox: true });
        if (!tableData || !Array.isArray(tableData.rows) || !tableData.rows.length) return '';
        tableMap[tableId] = tableData;
        return cv7991TablePlaceholderToken(tableId);
      };

      const paragraphInlineParts = (node, verticalTag = '', activeStyle = null) => {
        const style = activeStyle || {
          red: false, green: false, underline: false,
          fontSizePt: cv7991NormalCharacterHeightPt
        };
        if (!node) return [];
        if (node.nodeType === Node.TEXT_NODE) return textPart(node.nodeValue || '', style);
        if (node.nodeType !== Node.ELEMENT_NODE) return [];
        const local = String(node.localName || '').toLowerCase();
        const ns = node.namespaceURI || '';
        if (ns === W_NS && local === 'hyperlink' && hyperlinkContext) {
          const id = node.getAttributeNS('http://schemas.openxmlformats.org/officeDocument/2006/relationships', 'id')
            || node.getAttribute('r:id') || '';
          const href = cv7991SafeDocumentLinkUrl(hyperlinkContext.targets && hyperlinkContext.targets[id]);
          const parts = Array.from(node.childNodes || []).flatMap((child) => paragraphInlineParts(child, verticalTag, style));
          if (!href) return parts;
          const text = cv7991TextWithUnderlineTokens(parts);
          if (!text) return [];
          const key = `link_${++hyperlinkIndex}`;
          hyperlinkContext.links[key] = { href, text };
          // Lưu riêng liên kết để không nhận gạch chân/màu của link là đáp án đúng.
          return textPart(`[[CV7991_LINK:${key}]]`, null);
        }
        if (ns === W_NS && local === 'r') {
          const tag = runVerticalAlign(node) || verticalTag;
          const runStyle = mergeRunStyle(style, runStyleInfo(node));
          return Array.from(node.childNodes || []).flatMap((child) => paragraphInlineParts(child, tag, runStyle));
        }
        if (ns === W_NS && local === 't') {
          const value = node.textContent || '';
          return textPart(verticalTag ? `<${verticalTag}>${value}</${verticalTag}>` : value, style);
        }
        if (ns === W_NS && local === 'sym') {
          const value = cv7991WordSymbolText(node);
          return value ? textPart(value, style) : [];
        }
        if (ns === W_NS && local === 'tab') return textPart('\t', style);
        if (ns === W_NS && (local === 'br' || local === 'cr')) return textPart('\n', style);
        if (local === 'alternatecontent') {
          const branches = cv7991DirectChildren(node);
          const choice = branches.find((child) => String(child.localName || '').toLowerCase() === 'choice');
          const fallback = branches.find((child) => String(child.localName || '').toLowerCase() === 'fallback');
          const selected = choice || fallback;
          return selected ? cv7991DirectChildren(selected).flatMap((child) => paragraphInlineParts(child, verticalTag, style)) : [];
        }
        if (local === 'drawing') {
          const characterHeightPt = Number(style && style.fontSizePt) > 0
            ? Number(style.fontSizePt) : cv7991NormalCharacterHeightPt;
          const textBoxTableToken = cv7991TextBoxTablePlaceholderForDrawing(node);
          if (textBoxTableToken) return textPart(` ${textBoxTableToken} `, style);
          const groupToken = cv7991WordGroupPlaceholderForDrawing(node, characterHeightPt);
          if (groupToken) return textPart(` ${groupToken} `, style);
          const imgTokens = cv7991ImagePlaceholdersForNode(node, imageMap, characterHeightPt);
          return imgTokens.length ? textPart(` ${imgTokens.join(' ')} `, style) : [];
        }
        if (local === 'pict' || local === 'object' || local === 'imagedata' || local === 'blip') {
          const characterHeightPt = Number(style && style.fontSizePt) > 0
            ? Number(style.fontSizePt) : cv7991NormalCharacterHeightPt;
          const imgTokens = cv7991ImagePlaceholdersForNode(node, imageMap, characterHeightPt);
          return imgTokens.length ? textPart(` ${imgTokens.join(' ')} `, style) : [];
        }
        if (ns === M_NS && (local === 'omath' || local === 'omathpara')) {
          return textPart(mathPlaceholderForNode(node), style);
        }
        return Array.from(node.childNodes || []).flatMap((child) => paragraphInlineParts(child, verticalTag, style));
      };
      const paragraphInlineText = (node, verticalTag = '') => cv7991NormalizeLegacyWordSymbolText(
        paragraphInlineParts(node, verticalTag).map((part) => part.text).join('')
      );
      const cv7991StyledAnswerInfoFromParts = (parts) => {
        const rawParts = Array.isArray(parts) ? parts : [];
        const rawText = rawParts.map((part) => String(part && part.text || '')).join('');
        if (!rawText.trim()) return { letters: [], answerRanges: [] };
        const styledRanges = [];
        let cursor = 0;
        rawParts.forEach((part) => {
          const value = String(part && part.text || '');
          const start = cursor;
          const end = cursor + value.length;
          if (value.replace(/\s+/g, '').length && part && (part.red || part.green || part.underline)) {
            styledRanges.push({
              start,
              end,
              red: !!part.red,
              green: !!part.green,
              underline: !!part.underline
            });
          }
          cursor = end;
        });
        if (!styledRanges.length) return { letters: [], answerRanges: [] };

        const optionMarkers = [];
        const addMarker = (index, bodyStart, letter, letterStart) => {
          const normalized = String(letter || '').trim().toUpperCase();
          if (!/^[A-D]$/.test(normalized)) return;
          const safeIndex = Math.max(0, Number(index) || 0);
          const safeBodyStart = Math.max(safeIndex + 1, Number(bodyStart) || (safeIndex + 1));
          const safeLetterStart = Math.max(safeIndex, Number(letterStart) || safeIndex);
          optionMarkers.push({
            index: safeIndex,
            bodyStart: safeBodyStart,
            letterStart: safeLetterStart,
            letterEnd: safeLetterStart + 1,
            letter: normalized,
          });
        };

        const startMatch = rawText.match(/^\s*([A-Da-d])[\.\)]\s*/u);
        if (startMatch) {
          const markerIndex = startMatch.index || 0;
          const letterOffset = String(startMatch[0] || '').search(/[A-Da-d]/u);
          addMarker(markerIndex, markerIndex + startMatch[0].length, startMatch[1], markerIndex + Math.max(0, letterOffset));
        }
        const re = /(?:\t+| {2,}|\n+)([A-Da-d])[\.\)]\s*/gu;
        let match;
        while ((match = re.exec(rawText))) {
          const full = String(match[0] || '');
          const letterOffset = full.search(/[A-Da-d]/u);
          const markerIndex = match.index + Math.max(0, letterOffset);
          addMarker(markerIndex, re.lastIndex, match[1], markerIndex);
        }

        const uniqueMarkers = [];
        optionMarkers.sort((a, b) => a.index - b.index).forEach((marker) => {
          if (!uniqueMarkers.some((item) => item.index === marker.index && item.letter === marker.letter)) uniqueMarkers.push(marker);
        });
        const letters = [];
        const answerRanges = [];
        uniqueMarkers.forEach((marker, index) => {
          const nextIndex = index + 1 < uniqueMarkers.length ? uniqueMarkers[index + 1].index : rawText.length;
          const optionRange = { start: marker.index, end: nextIndex };
          const markerRange = { start: marker.letterStart, end: Math.max(marker.letterEnd, marker.bodyStart) };
          const letterRange = { start: marker.letterStart, end: marker.letterEnd };
          const redAnswer = styledRanges.some((span) => span.red && span.end > optionRange.start && span.start < optionRange.end);
          const greenLetter = styledRanges.some((span) => span.green && span.end > letterRange.start && span.start < letterRange.end);
          const underlinedMarker = styledRanges.some((span) => span.underline && span.end > markerRange.start && span.start < markerRange.end);
          if (!redAnswer && !greenLetter && !underlinedMarker) return;
          if (!letters.includes(marker.letter)) letters.push(marker.letter);
          // Chỉ ẩn gạch chân dùng để mã hóa đáp án ở chữ cái đầu. Các đoạn gạch
          // chân mang nội dung trong câu/phương án vẫn được giữ nguyên khi trình chiếu.
          if (underlinedMarker) answerRanges.push(markerRange);
        });
        return { letters, answerRanges };
      };
      const cv7991StyledAnswerLetterFromParts = (parts) => cv7991StyledAnswerInfoFromParts(parts).letters[0] || '';
      const cv7991TextWithUnderlineTokens = (parts, suppressRanges = []) => {
        const rawParts = Array.isArray(parts) ? parts : [];
        const blocked = Array.isArray(suppressRanges) ? suppressRanges : [];
        let cursor = 0;
        let output = '';
        rawParts.forEach((part) => {
          const value = String(part && part.text || '');
          const start = cursor;
          const end = cursor + value.length;
          cursor = end;
          if (!value || !(part && part.underline)) {
            output += value;
            return;
          }
          const boundaries = [0, value.length];
          blocked.forEach((range) => {
            const left = Math.max(start, Number(range && range.start) || 0);
            const right = Math.min(end, Number(range && range.end) || 0);
            if (right > left) boundaries.push(left - start, right - start);
          });
          const cuts = Array.from(new Set(boundaries)).sort((a, b) => a - b);
          for (let index = 0; index + 1 < cuts.length; index += 1) {
            const localStart = cuts[index];
            const localEnd = cuts[index + 1];
            if (localEnd <= localStart) continue;
            const chunk = value.slice(localStart, localEnd);
            const globalStart = start + localStart;
            const globalEnd = start + localEnd;
            const suppressed = blocked.some((range) => globalEnd > Number(range && range.start || 0) && globalStart < Number(range && range.end || 0));
            if (suppressed || !chunk.replace(/\s+/g, '').length) output += chunk;
            else output += `${cv7991UnderlineStartToken()}${chunk}${cv7991UnderlineEndToken()}`;
          }
        });
        return output;
      };
      const paragraphInfo = (pNode) => {
        const parts = paragraphInlineParts(pNode);
        const answerInfo = cv7991StyledAnswerInfoFromParts(parts);
        // Preserve Word's intentional spaces/tabs separately from parser text.
        let sourceText = cv7991NormalizeLegacyWordSymbolText(
          cv7991TextWithUnderlineTokens(parts, answerInfo.answerRanges)
        ).trim();
        let text = sourceText
          .replace(/\u00a0/g, ' ')
          .replace(/ +/g, ' ')
          .replace(/ *\t+ */g, '\t')
          .replace(/:\s*\.\s*(?=[∆A-Za-z<])/g, ': ')
          .trim();
        /* Shape neo (wp:anchor) có thể được Word ghi trước run chữ dù trên
           trang nó nằm cạnh hoặc dưới câu hỏi. Nếu giữ nguyên thứ tự XML,
           dòng sẽ bắt đầu bằng token ảnh thay vì “Câu n.” và bộ tách câu sẽ
           không còn nhận ra câu đó. Chỉ với đoạn bắt đầu bằng câu hỏi, chuyển
           các Shape/ảnh neo ở đầu xuống ngay sau nội dung đoạn. */
        const sourceLeadingMedia = sourceText.match(/^((?:\[\[CV7991_IMG:[^\]]+\]\]\s*)+)(?=(?:Câu|Cau)\s+(?:\d+|\.{3}|…+))/i);
        const leadingFloatingMedia = text.match(/^((?:\[\[CV7991_IMG:[^\]]+\]\]\s*)+)(?=(?:Câu|Cau)\s+(?:\d+|\.{3}|…+))/i);
        if (leadingFloatingMedia) {
          const mediaTokens = String(leadingFloatingMedia[1] || '').trim();
          const paragraphBody = text.slice(leadingFloatingMedia[0].length).trim();
          text = paragraphBody && mediaTokens ? `${paragraphBody}\n${mediaTokens}` : (paragraphBody || mediaTokens);
          // Keep the same source paragraph even when parser tokens need a new line.
          if (sourceLeadingMedia) {
            const originalBody = sourceText.slice(sourceLeadingMedia[0].length).trim();
            sourceText = `${originalBody} ${sourceLeadingMedia[1].trim()}`;
          }
        }
        return { text, sourceText, answerHint: answerInfo.letters[0] || '', answerHints: answerInfo.letters };
      };
      const paragraphText = (pNode, sourceInfo = null, allowNdtcNumber = false) => {
        const info = paragraphInfo(pNode);
        const automaticPrefix = cv7991ParagraphAutomaticLetterPrefix(pNode, info.text, allowNdtcNumber);
        const visibleText = automaticPrefix
          ? `${automaticPrefix} ${info.text}`.trim()
          : info.text;
        const sourceVisibleText = automaticPrefix
          ? `${automaticPrefix} ${info.sourceText}`.trim()
          : info.sourceText;
        if (sourceInfo) sourceInfo.sourceText = sourceVisibleText;
        if (!visibleText) return '';
        const tokens = (Array.isArray(info.answerHints) ? info.answerHints : [info.answerHint])
          .map((letter) => cv7991AnswerHintToken(letter))
          .filter(Boolean);
        return tokens.length ? `${visibleText} ${tokens.join(' ')}` : visibleText;
      };

      const cv7991TableInlineParts = (node, inheritedStyle = {}, verticalTag = '') => {
        if (!node) return [];
        if (node.nodeType === Node.TEXT_NODE) {
          const value = String(node.nodeValue || '');
          return value ? [{ text: value, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }] : [];
        }
        if (node.nodeType !== Node.ELEMENT_NODE) return [];
        const local = String(node.localName || '').toLowerCase();
        const ns = node.namespaceURI || '';
        if (ns === W_NS && local === 'hyperlink' && hyperlinkContext) {
          return paragraphInlineParts(node, verticalTag).map((part) => ({
            text: part.text, style: Object.assign({}, inheritedStyle), script: ''
          }));
        }
        if (ns === W_NS && local === 'r') {
          const rPr = firstChildByLocalName(node, 'rPr');
          const style = cv7991MergeFormatting(Object.assign({}, inheritedStyle), cv7991RunFormattingFromPr(rPr));
          const tag = runVerticalAlign(node) || verticalTag;
          return Array.from(node.childNodes || []).flatMap((child) => cv7991TableInlineParts(child, style, tag));
        }
        if (ns === W_NS && local === 't') {
          const value = String(node.textContent || '');
          return value ? [{ text: value, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }] : [];
        }
        if (ns === W_NS && local === 'sym') {
          const value = cv7991WordSymbolText(node);
          return value ? [{ text: value, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }] : [];
        }
        if (ns === W_NS && local === 'tab') return [{ text: '\t', style: Object.assign({}, inheritedStyle), script: verticalTag || '' }];
        if (ns === W_NS && (local === 'br' || local === 'cr')) return [{ text: '\n', style: Object.assign({}, inheritedStyle), script: verticalTag || '' }];
        if (local === 'alternatecontent') {
          const branches = cv7991DirectChildren(node);
          const choice = branches.find((child) => String(child.localName || '').toLowerCase() === 'choice');
          const fallback = branches.find((child) => String(child.localName || '').toLowerCase() === 'fallback');
          const selected = choice || fallback;
          return selected ? cv7991DirectChildren(selected).flatMap((child) => cv7991TableInlineParts(child, inheritedStyle, verticalTag)) : [];
        }
        if (local === 'drawing') {
          const characterHeightPt = Number(inheritedStyle && inheritedStyle.fontSizePt) > 0
            ? Number(inheritedStyle.fontSizePt) : cv7991NormalCharacterHeightPt;
          const textBoxTableToken = cv7991TextBoxTablePlaceholderForDrawing(node);
          if (textBoxTableToken) return [{ text: ` ${textBoxTableToken} `, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }];
          const groupToken = cv7991WordGroupPlaceholderForDrawing(node, characterHeightPt);
          if (groupToken) return [{ text: ` ${groupToken} `, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }];
          const tokens = cv7991ImagePlaceholdersForNode(node, imageMap, characterHeightPt);
          return tokens.length ? [{ text: ` ${tokens.join(' ')} `, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }] : [];
        }
        if (local === 'pict' || local === 'object' || local === 'imagedata' || local === 'blip') {
          const characterHeightPt = Number(inheritedStyle && inheritedStyle.fontSizePt) > 0
            ? Number(inheritedStyle.fontSizePt) : cv7991NormalCharacterHeightPt;
          const tokens = cv7991ImagePlaceholdersForNode(node, imageMap, characterHeightPt);
          return tokens.length ? [{ text: ` ${tokens.join(' ')} `, style: Object.assign({}, inheritedStyle), script: verticalTag || '' }] : [];
        }
        if (ns === M_NS && (local === 'omath' || local === 'omathpara')) {
          return [{ text: mathPlaceholderForNode(node), style: Object.assign({}, inheritedStyle), script: verticalTag || '' }];
        }
        return Array.from(node.childNodes || []).flatMap((child) => cv7991TableInlineParts(child, inheritedStyle, verticalTag));
      };
      const cv7991TableParagraphData = (pNode, inheritedRunStyle = {}, inheritedParagraphStyle = {}) => {
        const pPr = firstChildByLocalName(pNode, 'pPr');
        const paragraphStyle = cv7991MergeFormatting(Object.assign({}, inheritedParagraphStyle), cv7991ParagraphFormattingFromPr(pPr));
        const pRunPr = firstChildByLocalName(pPr, 'rPr');
        const baseRunStyle = cv7991MergeFormatting(Object.assign({}, inheritedRunStyle), cv7991RunFormattingFromPr(pRunPr));
        let runs = Array.from(pNode && pNode.childNodes || []).flatMap((child) => cv7991TableInlineParts(child, baseRunStyle, ''));
        runs = runs.filter((part) => part && String(part.text || '') !== '');
        const merged = [];
        runs.forEach((part) => {
          const styleKey = JSON.stringify(part.style || {});
          const last = merged[merged.length - 1];
          if (last && last._styleKey === styleKey && String(last.script || '') === String(part.script || '')) {
            last.text += String(part.text || '');
          } else {
            merged.push({ text: String(part.text || ''), style: Object.assign({}, part.style || {}), script: String(part.script || ''), _styleKey: styleKey });
          }
        });
        merged.forEach((part) => {
          part.text = cv7991NormalizeLegacyWordSymbolText(part.text);
          delete part._styleKey;
        });
        return { runs: merged, align: paragraphStyle.align || '' };
      };
      const cv7991FormattingForTableCell = (styleInfo, look, rowIndex, rowCount, colStart, colEnd, colCount, rowBandSize, colBandSize) => {
        const result = { run: {}, para: {}, cell: { borders: {} }, table: { borders: {} } };
        cv7991MergeFormatting(result, styleInfo.base || {});
        const applyConditional = (type) => {
          if (type && styleInfo.conditional && styleInfo.conditional[type]) cv7991MergeFormatting(result, styleInfo.conditional[type]);
        };
        const rowBandStart = look.firstRow ? 1 : 0;
        const rowBandEnd = rowCount - (look.lastRow ? 1 : 0);
        if (!look.noHBand && rowIndex >= rowBandStart && rowIndex < rowBandEnd) {
          const band = Math.floor((rowIndex - rowBandStart) / Math.max(1, rowBandSize || 1)) % 2 === 0 ? 'band1Horz' : 'band2Horz';
          applyConditional(band);
        }
        const colBandStart = look.firstColumn ? 1 : 0;
        const colBandEnd = colCount - (look.lastColumn ? 1 : 0);
        if (!look.noVBand && colStart >= colBandStart && colStart < colBandEnd) {
          const band = Math.floor((colStart - colBandStart) / Math.max(1, colBandSize || 1)) % 2 === 0 ? 'band1Vert' : 'band2Vert';
          applyConditional(band);
        }
        if (look.firstColumn && colStart === 0) applyConditional('firstCol');
        if (look.lastColumn && colEnd >= colCount) applyConditional('lastCol');
        if (look.firstRow && rowIndex === 0) applyConditional('firstRow');
        if (look.lastRow && rowIndex === rowCount - 1) applyConditional('lastRow');
        if (rowIndex === 0 && colStart === 0) applyConditional('nwCell');
        if (rowIndex === 0 && colEnd >= colCount) applyConditional('neCell');
        if (rowIndex === rowCount - 1 && colStart === 0) applyConditional('swCell');
        if (rowIndex === rowCount - 1 && colEnd >= colCount) applyConditional('seCell');
        return result;
      };
      const cv7991HasBorderValues = (borders) => !!(borders && Object.keys(borders).some((key) => borders[key] !== undefined));
      const cv7991ResolvedCellBorder = (cellBorders, tableBorders, edge, rowIndex, rowCount, colStart, colEnd, colCount, useWordDefaults) => {
        if (cellBorders && cellBorders[edge] !== undefined) return cellBorders[edge];
        let border;
        if (edge === 'top') border = rowIndex === 0 ? tableBorders.top : tableBorders.insideH;
        else if (edge === 'bottom') border = rowIndex === rowCount - 1 ? tableBorders.bottom : tableBorders.insideH;
        else if (edge === 'left') border = colStart === 0 ? tableBorders.left : tableBorders.insideV;
        else if (edge === 'right') border = colEnd >= colCount ? tableBorders.right : tableBorders.insideV;
        if (border !== undefined) return border;
        return useWordDefaults ? { style: 'none', widthPx: 0, color: 'transparent', explicit: false } : undefined;
      };
      const tableToData = (tblNode, tableId, options = {}) => {
        const tblPr = firstChildByLocalName(tblNode, 'tblPr');
        const styleNode = firstChildByLocalName(tblPr, 'tblStyle');
        const styleId = String(cv7991WordAttr(styleNode, 'val') || '').trim();
        const styleInfo = cv7991ResolveTableStyle(styleId);
        const look = cv7991TableLook(tblPr);
        const directTableFormat = cv7991TableFormattingFromPr(tblPr);
        const tableFormat = cv7991MergeFormatting(
          Object.assign({ borders: {} }, (styleInfo.base && styleInfo.base.table) || {}),
          directTableFormat
        );
        const tblGrid = firstChildByLocalName(tblNode, 'tblGrid');
        const columnWidths = cv7991DirectChildren(tblGrid, 'gridCol').map((node) => {
          const value = Number(cv7991WordAttr(node, 'w') || 0);
          return Number.isFinite(value) && value > 0 ? value : 0;
        });
        const rawRows = [];
        cv7991DirectChildren(tblNode, 'tr').forEach((rowNode) => {
          const rawCells = [];
          let logicalColumn = 0;
          cv7991DirectChildren(rowNode, 'tc').forEach((cellNode) => {
            const tcPr = firstChildByLocalName(cellNode, 'tcPr');
            const gridSpanNode = firstChildByLocalName(tcPr, 'gridSpan');
            const parsedSpan = parseInt(cv7991WordAttr(gridSpanNode, 'val') || '1', 10);
            const gridSpan = Number.isFinite(parsedSpan) && parsedSpan > 1 ? parsedSpan : 1;
            const vMergeNode = firstChildByLocalName(tcPr, 'vMerge');
            const vMergeRaw = vMergeNode ? String(cv7991WordAttr(vMergeNode, 'val') || '').trim().toLowerCase() : '';
            const vMerge = vMergeNode ? (vMergeRaw === 'restart' ? 'restart' : 'continue') : '';
            rawCells.push({
              node: cellNode,
              tcPr,
              gridSpan,
              colStart: logicalColumn,
              colEnd: logicalColumn + gridSpan,
              vMerge,
              rowSpan: 1,
              skip: false,
            });
            logicalColumn += gridSpan;
          });
          if (rawCells.length) rawRows.push(rawCells);
        });
        const rowCount = rawRows.length;
        const colCount = Math.max(columnWidths.length, ...rawRows.map((row) => row.reduce((max, cell) => Math.max(max, cell.colEnd), 0)), 1);
        rawRows.forEach((row, rowIndex) => {
          row.forEach((cell) => {
            if (cell.vMerge !== 'restart') return;
            let span = 1;
            for (let nextRowIndex = rowIndex + 1; nextRowIndex < rawRows.length; nextRowIndex += 1) {
              const continuation = rawRows[nextRowIndex].find((candidate) => candidate.colStart === cell.colStart && candidate.gridSpan === cell.gridSpan && candidate.vMerge === 'continue');
              if (!continuation) break;
              continuation.skip = true;
              span += 1;
            }
            cell.rowSpan = span;
          });
        });
        const rowBandSize = Number(directTableFormat.rowBandSize || (styleInfo.base && styleInfo.base.table && styleInfo.base.table.rowBandSize) || 1) || 1;
        const colBandSize = Number(directTableFormat.colBandSize || (styleInfo.base && styleInfo.base.table && styleInfo.base.table.colBandSize) || 1) || 1;
        const tableBorders = Object.assign({}, tableFormat.borders || {});
        const useWordBorderDefaults = !!styleInfo.found || !!styleId || cv7991HasBorderValues(tableBorders);
        const rows = rawRows.map((rawRow, rowIndex) => rawRow.map((rawCell) => {
          const computed = cv7991FormattingForTableCell(styleInfo, look, rowIndex, rowCount, rawCell.colStart, rawCell.colEnd, colCount, rowBandSize, colBandSize);
          const directCell = cv7991CellFormattingFromPr(rawCell.tcPr);
          const cellFormatting = cv7991MergeFormatting(Object.assign({ borders: {} }, computed.cell || {}), directCell);
          const paragraphs = [];
          const plainLines = [];
          cv7991DirectChildren(rawCell.node).forEach((child) => {
            const local = String(child.localName || '').toLowerCase();
            if (local === 'p') {
              const plain = paragraphText(child);
              if (plain) plainLines.push(plain);
              const paragraph = cv7991TableParagraphData(child, computed.run || {}, computed.para || {});
              if ((paragraph.runs || []).length || paragraph.align) paragraphs.push(paragraph);
            } else if (local === 'tbl') {
              tableIndex += 1;
              const nestedId = `tbl_${tableIndex}`;
              tableMap[nestedId] = tableToData(child, nestedId, options);
              const token = cv7991TablePlaceholderToken(nestedId);
              plainLines.push(token);
              paragraphs.push({ runs: [{ text: token, style: Object.assign({}, computed.run || {}), script: '' }], align: (computed.para && computed.para.align) || '' });
            }
          });
          const resolvedBorders = {};
          ['top', 'right', 'bottom', 'left'].forEach((edge) => {
            resolvedBorders[edge] = cv7991ResolvedCellBorder(
              cellFormatting.borders || {}, tableBorders, edge,
              rowIndex, rowCount, rawCell.colStart, rawCell.colEnd, colCount,
              useWordBorderDefaults || cv7991HasBorderValues(cellFormatting.borders)
            );
          });
          return {
            text: plainLines.join('\n'),
            paragraphs,
            gridSpan: rawCell.gridSpan,
            rowSpan: rawCell.rowSpan,
            skip: rawCell.skip,
            colStart: rawCell.colStart,
            colEnd: rawCell.colEnd,
            fill: cellFormatting.fill || '',
            vAlign: cellFormatting.vAlign || (options && options.textBox ? 'top' : 'middle'),
            borders: resolvedBorders,
          };
        }));
        const firstVisibleRow = rows[0] ? rows[0].filter((cell) => cell && !cell.skip) : [];
        const firstRowMerged = firstVisibleRow.length === 1 && Number(firstVisibleRow[0].gridSpan || 1) >= colCount;
        const sourceRowHeightsPx = cv7991DirectChildren(tblNode, 'tr').map((row) =>
          Number(cv7991WordAttr(firstChildByLocalName(firstChildByLocalName(row, 'trPr'), 'trHeight'), 'val')) / 15
        );
        let rowHeightPercentages = [];
        if (options && options.textBox && sourceRowHeightsPx.length) {
          const basis = sourceRowHeightsPx.map((value) => Number(value) > 0 ? Number(value) : 18);
          const total = basis.reduce((sum, value) => sum + Math.max(1, value), 0) || 1;
          rowHeightPercentages = basis.map((value) => Math.max(1, value) / total * 100);
        }
        return {
          id: tableId,
          rows,
          columnWidths,
          sourceTableIndentPx: Number(cv7991WordAttr(firstChildByLocalName(firstChildByLocalName(tblNode, 'tblPr'), 'tblInd'), 'w')) / 15,
          sourceRowHeightsPx,
          rowHeightPercentages,
          isTextBoxTable: !!(options && options.textBox),
          columnCount: colCount,
          firstRowMerged,
          styleId,
          hasWordFormatting: !!styleInfo.found || !!styleId || cv7991HasBorderValues(tableBorders),
        };
      };
      const cv7991TableHasFollowingChoices = (tableNode) => {
        const expected = ['A', 'B', 'C', 'D'];
        let count = 0;
        for (let sibling = tableNode && tableNode.nextElementSibling; sibling; sibling = sibling.nextElementSibling) {
          const local = String(sibling.localName || '').toLowerCase();
          if (local !== 'p') {
            if (count) break;
            continue;
          }
          // Đọc chữ thuần để xem trước, không gọi paragraphText: hàm đó còn
          // đăng ký ảnh/công thức nên gọi hai lần sẽ sinh mã đối tượng thừa.
          const text = Array.from(sibling.getElementsByTagNameNS(W_NS, 't'))
            .map((node) => node.textContent || '').join('').trim();
          if (!text) continue;
          if (cv7991LineLooksLikeBankBoundary(text) || cv7991GuideStartInfo(text)
              || /^(?:Câu|Cau)\s*(?:\d+|\.{3}|…+)/i.test(text)
              || /^NDTC(?:\s*\d+)?\s*[:：]/i.test(text)) break;
          const match = text.match(/^([A-D])[\.\)]\s*/u);
          if (match) {
            if (match[1] !== expected[count]) break;
            count += 1;
            if (count === expected.length) return true;
          }
        }
        return false;
      };
      const cv7991OptionLinesFromTableData = (tableData, sourceTableNode = null) => {
        // Có bộ phương án riêng ngoài bảng: giữ bảng làm dữ liệu của đề bài.
        if (cv7991TableHasFollowingChoices(sourceTableNode)) return null;
        const rows = Array.isArray(tableData && tableData.rows) ? tableData.rows : [];
        const visibleCells = (row) => (Array.isArray(row) ? row : []).filter((cell) => cell && !cell.skip);
        const collapseCellText = (cell) => String(cell && cell.text || '')
          .replace(/\r/g, '')
          .split('\n')
          .map((line) => String(line || '').replace(/\s+/g, ' ').trim())
          .filter(Boolean)
          .join(' ')
          .trim();
        const plainCellText = (value) => String(value || '')
          .normalize('NFD')
          .replace(/[\u0300-\u036f]/g, '')
          .replace(/đ/g, 'd')
          .replace(/Đ/g, 'D')
          .toLowerCase()
          .replace(/\[\[\s*cv7991_[^\]]+\]\]/gi, ' ')
          .replace(/\s+/g, ' ')
          .trim();
        const statusFromCell = (value) => {
          const compact = plainCellText(value).replace(/[^a-z]/g, '');
          if (/^(?:d|dung|true|t)$/.test(compact)) return true;
          if (/^(?:s|sai|false|f)$/.test(compact)) return false;
          return null;
        };

        /* Nhận dạng bảng đáp án Đúng–Sai gồm cột nội dung a/b/c/d và cột Đ/S.
           Chỉ cần ghi Đ ở các ý đúng; ô trống hoặc các ô còn lại được hiểu là S. */
        const tfItems = new Map();
        const tfStatuses = new Map();
        let tfHeaderDetected = false;
        rows.forEach((row) => {
          const cells = visibleCells(row);
          const texts = cells.map(collapseCellText);
          if (texts.some((value) => /(?:^|\s)(?:d|dung)\s*(?:hoac|\/|–|-)?\s*s(?:ai)?(?:\s|$)/.test(plainCellText(value)))) {
            tfHeaderDetected = true;
          }
          let itemIndex = -1;
          let itemMatch = null;
          for (let index = 0; index < texts.length; index += 1) {
            const match = texts[index].match(/^\s*([a-d])\s*[\.\)\]:：]\s*(.*)$/u);
            if (match) {
              itemIndex = index;
              itemMatch = match;
              break;
            }
          }
          if (!itemMatch) return;
          const letter = String(itemMatch[1] || '').toLowerCase();
          let body = String(itemMatch[2] || '').trim();
          if (!body) {
            const contentCell = texts.find((value, index) => index !== itemIndex && statusFromCell(value) === null && value);
            body = String(contentCell || '').trim();
          }
          if (!body) return;
          if (!tfItems.has(letter)) tfItems.set(letter, body);
          const otherTexts = texts.filter((_, index) => index !== itemIndex);
          const explicitStatus = otherTexts.map(statusFromCell).find((value) => value !== null);
          if (explicitStatus !== undefined) tfStatuses.set(letter, explicitStatus);
        });
        const tfOrder = ['a', 'b', 'c', 'd'].filter((letter) => tfItems.has(letter));
        const isTfAnswerTable = tfOrder.length >= 2 && (tfHeaderDetected || tfStatuses.size > 0);
        if (isTfAnswerTable) {
          const lines = tfOrder.map((letter) => `${letter}) ${tfItems.get(letter)}`);
          const answerLine = `Đáp án: ${tfOrder.map((letter) => `${letter} ${tfStatuses.get(letter) === true ? 'Đ' : 'S'}`).join('; ')}`;
          return lines.concat(answerLine);
        }

        const cellTexts = [];
        rows.forEach((row) => {
          visibleCells(row).forEach((cell) => {
            String(cell && cell.text || '').replace(/\r/g, '').split('\n').forEach((line) => {
              const cleaned = line.replace(/\s+/g, ' ').trim();
              if (cleaned) cellTexts.push(cleaned);
            });
          });
        });
        if (!cellTexts.length) return null;
        const collectLabeledOptions = (labelRe, labels) => {
          /* 2026-09-16: A/B/C/D trong bảng số liệu KHÔNG mặc nhiên là đáp án.
             Chỉ tách bảng dùng để dàn phương án khi TOÀN BỘ ô có nội dung đều
             thuộc các phương án, không bỏ mất tiêu đề/cột dữ liệu. Nhãn đứng
             riêng chỉ được ghép với ô liền sau TRONG CÙNG HÀNG. Giữ tất cả
             đoạn văn, ảnh, bảng con và công thức của từng phương án. */
          const found = Object.create(null);
          const stripHints = (value) => String(value || '').replace(cv7991AnswerHintRegex(), '').trim();
          const bareLabelRe = new RegExp('^(' + labels.join('|') + ')[\\.\\)]?$');
          const optionStartRe = new RegExp('^(' + labels.join('|') + ')[\\.\\)]\\s*');
          const cellLines = (cell) => String(cell && cell.text || '').replace(/\r/g, '')
            .split('\n').map((line) => line.trim()).filter(Boolean);
          const addOption = (label, body) => {
            if (!labels.includes(label) || Object.prototype.hasOwnProperty.call(found, label)
                || !stripHints(body)) return false;
            found[label] = String(body || '').trim();
            return true;
          };
          for (const row of rows) {
            const cells = visibleCells(row).map(cellLines).filter((lines) => lines.length);
            for (let cellIndex = 0; cellIndex < cells.length; cellIndex += 1) {
              const paragraphs = cells[cellIndex];
              const first = stripHints(paragraphs[0]);
              const bare = paragraphs.length === 1 ? first.match(bareLabelRe) : null;
              if (bare) {
                const following = cells[cellIndex + 1];
                if (!following || bareLabelRe.test(stripHints(following[0]))
                    || optionStartRe.test(stripHints(following[0]))) return null;
                const hints = cv7991ExtractAnswerHintsFromLine(paragraphs[0])
                  .map(cv7991AnswerHintToken).join(' ');
                if (!addOption(bare[1], [hints, ...following].filter(Boolean).join('\n'))) return null;
                cellIndex += 1;
                continue;
              }
              let label = '';
              let body = [];
              for (const paragraph of paragraphs) {
                // Chấp nhận cả nhãn A. riêng một đoạn và nội dung ở đoạn kế
                // tiếp của CÙNG Ô; không lấy nhầm một ô dữ liệu ở hàng khác.
                const match = paragraph.match(labelRe) || paragraph.match(optionStartRe);
                if (match) {
                  if (label && !addOption(label, body.join('\n'))) return null;
                  label = String(match[1] || '');
                  body = [paragraph.replace(optionStartRe, '').trim()].filter(Boolean);
                } else {
                  if (!label) return null;
                  body.push(paragraph);
                }
              }
              if (!label || !addOption(label, body.join('\n'))) return null;
            }
          }
          if (!labels.every((label) => Object.prototype.hasOwnProperty.call(found, label))) return null;
          return labels.map((label) => `${label}. ${found[label]}`);
        };

        /* Nhiều đề tự luận dùng bảng Word 2 cột chỉ để dàn các ý a, b, c, d.
           Không giữ bảng đó như một phương tiện trực quan ở cột phải. Thay vào đó,
           nhận các ô bắt đầu bằng a)/b)/c)/d), sắp lại đúng thứ tự và trả về từng
           dòng nội dung để bộ trình chiếu dựng các ý thành một cột dưới đề bài.
           Chấp nhận từ 2 đến 4 ý vì câu tự luận không bắt buộc phải có đủ a-b-c-d. */
        const collectSequentialEssaySubparts = () => {
          const sequence = ['a', 'b', 'c', 'd'];
          const found = Object.create(null);
          const consumed = new Set();
          cellTexts.forEach((text, idx) => {
            if (consumed.has(idx)) return;
            const value = String(text || '').trim();
            let match = value.match(/^\s*([a-d])\s*[\.\)\]:：]\s*(.+)$/iu);
            if (match) {
              const letter = String(match[1] || '').toLowerCase();
              const body = String(match[2] || '').trim();
              if (body && !found[letter]) {
                found[letter] = body;
                consumed.add(idx);
              }
              return;
            }
            match = value.match(/^\s*([a-d])\s*[\.\)]?\s*$/iu);
            if (match && idx + 1 < cellTexts.length) {
              const letter = String(match[1] || '').toLowerCase();
              const body = String(cellTexts[idx + 1] || '').trim();
              const nextLooksLikeItem = /^\s*[a-d]\s*[\.\)\]:：]/iu.test(body);
              if (body && !nextLooksLikeItem && !found[letter]) {
                found[letter] = body;
                consumed.add(idx);
                consumed.add(idx + 1);
              }
            }
          });
          const items = [];
          for (const letter of sequence) {
            if (!found[letter]) break;
            items.push(`${letter}) ${found[letter]}`);
          }
          /* Chỉ chuyển bảng khi toàn bộ ô có nội dung đều đã được xác định là
             nhãn hoặc nội dung của các ý liên tiếp. Điều kiện này ngăn bảng dữ
             liệu thông thường có chữ a/b rải rác bị nhận nhầm là câu tự luận. */
          return items.length >= 2 && consumed.size === cellTexts.length ? items : null;
        };

        return collectLabeledOptions(/^([A-D])[\.\)]\s*(.+)$/u, ['A', 'B', 'C', 'D'])
          || collectSequentialEssaySubparts();
      };
      /* Chỉ cấp thêm nhãn 1)/2)/3)/4) của Automatic Numbering bên trong
         NDTC và Giải NDTC. Các danh sách Word khác giữ nguyên cách đọc cũ. */
      let cv7991InsideNdtcSequence = false;
      Array.from(body.childNodes || []).forEach((node) => {
        if (!node || node.nodeType !== Node.ELEMENT_NODE) return;
        const local = String(node.localName || '').toLowerCase();
        if (local === 'p') {
          const sourceInfo = {};
          const line = paragraphText(node, sourceInfo, cv7991InsideNdtcSequence);
          /* Bộ đọc DOCX chạy trước bộ trình chiếu NDTC, nên kiểm tra mốc
             ngay tại đây thay vì gọi hàm trong bộ trình chiếu chưa được tạo. */
          const ndtcMarkerText = String(line || '')
            .replace(/\[\[\s*CV7991_[^\]]+\]\]/gi, ' ')
            .replace(/<[^>]*>/g, ' ').replace(/\s+/g, ' ').trim();
          if (/^\*{3,}\s*(?:Hết|Het)\s+NDTC\s*\*{3,}$/i.test(ndtcMarkerText)) {
            cv7991InsideNdtcSequence = false;
          } else if (/^(?:(?:Giải|Giai)\s*)?(?:NDTC|Nội\s*dung\s*trình\s*chiếu|Noi\s*dung\s*trinh\s*chieu)\s*0*\d{0,4}\s*[:：]?(?:\s+.*)?$/i.test(ndtcMarkerText)) {
            cv7991InsideNdtcSequence = true;
          }
          if (line) lines.push(line);
          // Do not discard empty source paragraphs: drawings can be anchored to them.
          sourceBlocks.push({
              text: line, sourceText: sourceInfo.sourceText || '',
              format: cv7991SourceParagraphFormat(node),
              anchorFormat: cv7991SourceParagraphFormat(node, true),
              runs: Array.from(node.getElementsByTagNameNS(W_NS, 'r')).map((run) => {
                const props = firstChildByLocalName(run, 'rPr');
                const format = cv7991RunFormattingFromPr(props);
                const fonts = firstChildByLocalName(props, 'rFonts');
                format.fontFamily = cv7991WordAttr(fonts, 'ascii') || cv7991WordAttr(fonts, 'hAnsi') || '';
                const text = Array.from(run.childNodes).filter((child) =>
                  child.nodeType === Node.ELEMENT_NODE && child.namespaceURI === W_NS && child.localName === 't'
                ).map((child) => child.textContent).join('');
                return { text, format };
              }).filter((run) => run.text)
            });
          return;
        }
        if (local === 'tbl') {
          tableIndex += 1;
          const tableId = `tbl_${tableIndex}`;
          const tableData = tableToData(node, tableId);
          const optionLines = cv7991OptionLinesFromTableData(tableData, node);
          if (optionLines && optionLines.length) {
            lines.push(...optionLines);
          } else {
            tableMap[tableId] = tableData;
            const token = cv7991TablePlaceholderToken(tableId);
            lines.push(token);
            sourceBlocks.push({ text: token, format: { fontSizePx: cv7991NormalCharacterHeightPt * 96 / 72 } });
          }
        }
      });
      // A drawing-only paragraph before the first heading can be the anchor of
      // a picture in question 1. Keep that paragraph, and expose its tokens to
      // both question parsers instead of dropping them as a document preamble.
      const isQuestionHeading = (value) => /^(?:Câu|Cau)\s+(?:\d+|\.{3}|…+)/i.test(value);
      const firstQuestionIndex = sourceBlocks.findIndex((entry) => isQuestionHeading(entry.text));
      if (firstQuestionIndex > 0) {
        const prefixEntries = sourceBlocks.slice(0, firstQuestionIndex);
        const prefixTokens = [];
        const drawingOnly = prefixEntries.every((entry) => {
          const remainder = String(entry.text || '').replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (token, id) => {
            if (!imageMap[id] || !imageMap[id].sourceAnchor) return token;
            prefixTokens.push(token);
            return '';
          });
          return !remainder.trim();
        });
        if (drawingOnly && prefixTokens.length) {
          const first = sourceBlocks[firstQuestionIndex];
          const lineIndex = lines.findIndex(isQuestionHeading);
          first.sourcePrefixParagraphs = prefixEntries;
          first.text += `\n${prefixTokens.join(' ')}`;
          if (lineIndex >= 0) {
            lines[lineIndex] = first.text;
            for (let i = 0; i < lineIndex; i += 1) {
              prefixTokens.forEach((token) => { lines[i] = lines[i].split(token).join(''); });
            }
          }
        }
      }
      // Keep source paragraph geometry per question.
      let sourceGroup = [];
      const saveSourceGroup = () => {
        const tokens = sourceGroup.map((entry) => entry.text).join('\n');
        for (const match of tokens.matchAll(/\[\[CV7991_(IMG|TBL):([^\]]+)\]\]/g)) {
          const media = (match[1] === 'IMG' ? imageMap : tableMap)[match[2]];
          if (!media) continue;
          media.sourceTextWidthPx = cv7991SourceTextWidthPx;
          media.sourcePageWidthPx = cv7991SourcePageGeometry.width;
          media.sourcePageLeftPx = cv7991SourcePageGeometry.left;
          media.sourceFontPx = cv7991NormalCharacterHeightPt * 96 / 72;
          media.sourceParagraphs = sourceGroup;
          media.sourcePrefixParagraphs = sourceGroup[0]?.sourcePrefixParagraphs || [];
        }
      };
      sourceBlocks.forEach((entry) => {
        if (/^(?:Câu|Cau)\s+(?:\d+|\.{3}|…+)/i.test(entry.text) && sourceGroup.length) {
          saveSourceGroup();
          sourceGroup = [];
        }
        sourceGroup.push(entry);
      });
      saveSourceGroup();
      return lines.join('\n');
    }

    function cv7991NormalizeSpecHeader(text) {
      return String(text || '')
        .normalize('NFD').replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd').replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/[^a-z0-9]+/g, ' ')
        .trim();
    }

    function cv7991SpecTextFromXmlNode(node) {
      const parts = [];
      const walk = (current) => {
        if (!current) return;
        if (current.nodeType === Node.TEXT_NODE) {
          const value = String(current.nodeValue || '');
          if (value) parts.push(value);
          return;
        }
        if (current.nodeType !== Node.ELEMENT_NODE) return;
        const local = String(current.localName || '').toLowerCase();
        if (local === 't') {
          parts.push(String(current.textContent || ''));
          return;
        }
        if (local === 'tab') {
          parts.push(' ');
          return;
        }
        if (local === 'br' || local === 'cr') {
          parts.push('\n');
          return;
        }
        Array.from(current.childNodes || []).forEach(walk);
      };
      walk(node);
      return parts.join('')
        .replace(/\u00a0/g, ' ')
        .replace(/[ \t]+/g, ' ')
        .replace(/\s*\n\s*/g, '\n')
        .trim();
    }

    function cv7991SpecCellText(cellNode) {
      if (!cellNode) return '';
      const paragraphs = Array.from(cellNode.childNodes || []).filter((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === 'p');
      const lines = paragraphs.map(cv7991SpecTextFromXmlNode).map((line) => line.replace(/\s+/g, ' ').trim()).filter(Boolean);
      if (lines.length) return lines.join('\n');
      return cv7991SpecTextFromXmlNode(cellNode).replace(/\s+/g, ' ').trim();
    }

    function cv7991EmptyAvailableCounts() {
      return { mc_b: 0, mc_h: 0, mc_v: 0, mc_vdc: 0, tf_b: 0, tf_h: 0, tf_v: 0, tf_vdc: 0, short_b: 0, short_h: 0, short_v: 0, short_vdc: 0, essay_b: 0, essay_h: 0, essay_v: 0, essay_vdc: 0 };
    }

    function cv7991MergeBankItemsWithSpecItems(bankItems, specItems) {
      const bankList = Array.isArray(bankItems) ? bankItems : [];
      const specList = Array.isArray(specItems) ? specItems : [];
      if (!specList.length) return bankList.map((item, idx) => Object.assign({}, item, { index: idx + 1 }));
      const bankMap = new Map();
      bankList.forEach((item) => {
        const key = String(item && (item.unitKey || cv7991UnitKey(item.unit)) || '').trim();
        if (key && !bankMap.has(key)) bankMap.set(key, item);
      });
      const seen = new Set();
      const merged = specList.map((spec, idx) => {
        const key = String(spec && (spec.unitKey || cv7991UnitKey(spec.unit)) || '').trim();
        if (key) seen.add(key);
        const bankItem = key ? bankMap.get(key) : null;
        const bankReqs = (bankItem && bankItem.requirements) || {};
        const specReqs = (spec && spec.requirements) || {};
        return {
          index: idx + 1,
          chapter: String(spec && spec.chapter || bankItem && bankItem.chapter || 'Chưa phân chương').trim(),
          unit: String(spec && spec.unit || bankItem && bankItem.unit || `Nội dung ${idx + 1}`).trim(),
          unitKey: key || cv7991UnitKey(spec && spec.unit || bankItem && bankItem.unit || ''),
          requirements: {
            b: specReqs.b || bankReqs.b || '',
            h: specReqs.h || bankReqs.h || '',
            v: specReqs.v || bankReqs.v || '',
            vdc: specReqs.vdc || bankReqs.vdc || ''
          },
          available: (bankItem && bankItem.available) ? Object.assign(cv7991EmptyAvailableCounts(), bankItem.available) : cv7991EmptyAvailableCounts(),
          availabilityKnown: bankItem && bankItem.availabilityKnown !== undefined ? !!bankItem.availabilityKnown : !!(bankItem && bankItem.available),
          availabilityParsed: !!(bankItem && bankItem.availabilityParsed),
          metadataVersion: Math.max(0, Number(bankItem && bankItem.metadataVersion || 0) || 0),
          specSource: 'word'
        };
      });
      bankList.forEach((item) => {
        const key = String(item && (item.unitKey || cv7991UnitKey(item.unit)) || '').trim();
        if (key && seen.has(key)) return;
        merged.push(Object.assign({}, item, { index: merged.length + 1, specSource: 'bank_fallback' }));
      });
      return merged.map((item, idx) => Object.assign({}, item, { index: idx + 1 }));
    }

    function cv7991InferRequirement(unit, level) {
      const reqs = cv7991RequirementsForLesson(unit, '');
      if (level === 'h') return reqs[1];
      if (level === 'v') return reqs[2];
      if (level === 'vdc') return reqs[3];
      return reqs[0];
    }

    function cv7991CleanChapterTitle(text) {
      return String(text || '')
        .replace(/^\s*\d+\s*[\.\)]\s*/i, '')
        .replace(/\s*[-–—]\s*$/g, '')
        .replace(/\s+/g, ' ')
        .trim();
    }

    function cv7991CleanUnitTitle(text) {
      return String(text || '')
        .replace(/\s+/g, ' ')
        .replace(/\s*[:：]\s*$/g, '')
        .trim();
    }

    function cv7991ParseLessonLine(line) {
      const raw = String(line || '').replace(/\s+/g, ' ').trim();
      if (!raw) return null;
      let match = raw.match(/^\s*(?:\d+\s*[\.\)]\s*)?(Chương\s+.+?)\s*[-–—]\s*((?:Bài\s*\d+\s*[\.\)]?\s*.+)|(?:Tổng\s+hợp(?:\s+hợp)?\s+chương\s+.+))$/i);
      if (match) {
        return { chapter: cv7991CleanChapterTitle(match[1]), unit: cv7991CleanUnitTitle(match[2]) };
      }
      match = raw.match(/^\s*(?:\d+\s*[\.\)]\s*)?((?:Bài\s*\d+\s*[\.\)]?\s*.+)|(?:Tổng\s+hợp(?:\s+hợp)?\s+chương\s+.+))$/i);
      if (match && !/^Bài\s*tự\s*luận/i.test(match[1])) {
        return { chapter: '', unit: cv7991CleanUnitTitle(match[1]) };
      }
      return null;
    }

    function cv7991CompetencyFromLine(line) {
      const source = String(line || '').replace(/\r/g, '');
      if (!source.trim()) return '';
      const parts = source.split('\n');
      for (let i = 0; i < parts.length; i += 1) {
        const raw = String(parts[i] || '').trim();
        if (!raw) continue;
        const match = raw.match(/^(?:Năng\s*lực|Nang\s*luc)\s*:\s*(.+)$/i);
        if (match) return String(match[1] || '').replace(/\s+/g, ' ').trim();
      }
      return '';
    }

    // 2026-09-15: Chủ đề có thể chứa câu hỏi trực tiếp, không bắt buộc có Bài.
    // Chỉ nhận tiêu đề đánh số hoặc có dấu hai chấm; không nhận câu văn "chủ đề ...".
    function cv7991ParseTopicLine(line) {
      const raw = String(line || '')
        .normalize('NFC')
        .replace(/\[\[CV7991_FMT_U_(?:START|END)\]\]/g, '')
        .replace(/\s+/g, ' ')
        .trim();
      let match = raw.match(/^(?:\d+\s*[\.\)]\s*)?Chủ\s*đề\s*(\d+(?:\.\d+)*|[IVXLCDM]+)(?=$|[\s.\:：)\-–—])\s*[.\:：)\-–—]?\s*(.*)$/i);
      let label = '';
      let title = '';
      if (match) {
        label = `Chủ đề ${match[1].toUpperCase()}`;
        title = String(match[2] || '').trim();
      } else {
        match = raw.match(/^(?:\d+\s*[\.\)]\s*)?Chủ\s*đề\s*[:：]\s*(\S.*)$/i);
        if (!match) return null;
        label = 'Chủ đề';
        title = String(match[1] || '').trim();
      }
      // "Chủ đề 1. Tên chủ đề – Bài 1. Tên bài" vẫn giữ đúng hai cấp.
      const lessonMatch = title.match(/^(?:(.*?)\s*[-–—]\s*)?(Bài\s*\d+\s*[.\)]?\s*.+)$/i);
      const lesson = lessonMatch ? cv7991ParseLessonLine(lessonMatch[2]) : null;
      if (lesson) title = String(lessonMatch[1] || '').trim();
      const chapter = cv7991CleanChapterTitle(`${label}${title ? `${label === 'Chủ đề' ? ':' : '.'} ${title}` : ''}`);
      return { chapter, unit: lesson ? lesson.unit : '', hasTitle: !!title };
    }

    function cv7991IsTopicTitleContinuation(line) {
      const raw = String(line || '').trim();
      if (!raw || /\[\[CV7991_/i.test(raw)) return false;
      const plain = cv7991PlainLower(raw);
      // Dừng trước câu hỏi, phương án, tiêu đề cấu trúc và thông tin hướng dẫn.
      // Chỉ ghép các dòng tên liền sau CHỦ ĐỀ, trước khi bắt đầu đọc câu hỏi.
      if (/^(?:cau\s*(?:\d+|[.\u2026])|chu\s*de\b|chuong\b|bai\s*\d+|tong\s+hop\b)/i.test(plain)) return false;
      if (/^(?:\d+\s*[.)]\s*)?(?:chu\s*de\b|chuong\b|bai\s*\d+)/i.test(plain)) return false;
      if (/^[a-d]\s*[.):：]\s*/i.test(plain)) return false;
      if (/^(?:phan\s+(?:[ivxlcdm]+|\d+)\b|[ivxlcdm]+\s*[.)]\s*|tnkq\b|trac\s*nghiem\b|o\s*\(n\)|muc\s*do\b|nhan\s*biet\b|thong\s*hieu\b|van\s*dung\b)/i.test(plain)) return false;
      if (/^(?:yccd\b|yeu\s*cau\b|nang\s*luc\b|ghi\s*chu\b|huong\s*dan\b|dap\s*an\b|loi\s*giai\b|giai\s*thich\b|ma\s*(?:hinh|anh)\b|thu\s*vien\s*(?:hinh|anh)\b|ngan\s*hang\b)/i.test(plain)) return false;
      if (/^(?:mon(?:\s+hoc)?|lop|thoi\s*gian|tong\s*so(?:\s+cau)?|so\s*cau)\s*[:：]/i.test(plain)) return false;
      return !cv7991ParseLessonLine(raw)
        && !cv7991DetectQuestionFormatHeading(raw)
        && !cv7991ShouldRemoveBankMetaLine(raw);
    }

    function parseCv7991QuestionBankText(text, parseOptions = {}) {
      const bank = {};
      const itemMap = new Map();
      let chapter = '';
      let unit = '';
      let format = '';
      let level = '';
      let current = null;
      let pendingTopicTitle = null;
      let isStandaloneTopic = false;
      const fallbackUnit = String(parseOptions && parseOptions.fallbackUnit || '').trim() || 'Nội dung trong tệp';
      const ensureFallbackUnit = () => {
        if (unit) return;
        chapter = chapter || 'Chưa phân chương';
        unit = fallbackUnit;
        isStandaloneTopic = false;
      };

      const ensureItem = () => {
        if (!unit) return null;
        const key = cv7991UnitKey(unit);
        if (!itemMap.has(key)) {
          itemMap.set(key, {
            index: itemMap.size + 1,
            chapter: chapter || 'Chưa phân chương',
            unit,
            unitKey: key,
            requirements: {
              b: cv7991InferRequirement(unit, 'b'),
              h: cv7991InferRequirement(unit, 'h'),
              v: cv7991InferRequirement(unit, 'v'),
              vdc: cv7991InferRequirement(unit, 'vdc')
            },
            available: cv7991EmptyAvailableCounts(),

            // Đây là kết quả đã được parser đọc trực tiếp từ chính file Word.
            // Vì vậy mọi số 0 ở các dạng/mức độ khác cũng là số liệu thật,
            // không được coi là "chưa biết" như metadata cũ v5.
            availabilityKnown: true,
            availabilityParsed: true,
            metadataVersion: 7
          });
        } else if (chapter && itemMap.get(key).chapter === 'Chưa phân chương') {
          itemMap.get(key).chapter = chapter;
        }
        return itemMap.get(key);
      };

      const pushCurrent = () => {
        if (!current || !unit || !CV7991_FORMATS.includes(format) || !level) return;
        const body = (Array.isArray(current.lines) ? current.lines : [])
          .map((entry) => cv7991StripAnswerHintTokens(String(entry || '').trim()))
          .filter(Boolean)
          .join('\n')
          .trim();
        if (!body) return;
        const item = ensureItem();
        const unitKey = cv7991UnitKey(unit);
        const key = `${unitKey}|${format}|${level}`;
        if (!bank[key]) bank[key] = [];
        let answer = String(current.answer || '').trim();
        const answerLines = (Array.isArray(current.answerLines) ? current.answerLines : [])
          .map((entry) => String(entry || '').trim())
          .filter(Boolean);
        if (answerLines.length) answer = answerLines.join('\n').trim();
        if (format === 'tf' && !answer) {
          const trueLetters = new Set((Array.isArray(current.tfTrueLetters) ? current.tfTrueLetters : [])
            .map((value) => String(value || '').trim().toLowerCase())
            .filter((value) => /^[a-d]$/.test(value)));
          if (trueLetters.size) {
            answer = ['a', 'b', 'c', 'd']
              .map((letter) => `${letter}:${trueLetters.has(letter) ? 'Đ' : 'S'}`)
              .join(', ');
          }
        }
        bank[key].push({
          chapter: item ? item.chapter : chapter,
          unit,
          format,
          level,
          text: body,
          answer,
          guide: cv7991CleanGuideLines(current.guideLines || []),
          competency: ''
        });
        if (item && item.available) {
          const countKey = `${format}_${level}`;
          item.available[countKey] = (item.available[countKey] || 0) + 1;
        }
      };

      const makeCurrent = (line) => ({
        lines: [line],
        guideLines: [],
        answerLines: [],
        answer: '',
        tfTrueLetters: [],
        inGuide: false,
        inAnswer: false,
        competency: ''
      });

      String(text || '').replace(/\r/g, '').split('\n').forEach((raw) => {
        let line = raw.trim();
        if (!line) return;

        const topicInfo = cv7991ParseTopicLine(line);
        if (topicInfo) {
          pushCurrent();
          current = null;
          chapter = topicInfo.chapter;
          unit = topicInfo.unit || chapter;
          format = 'mc';
          level = '';
          isStandaloneTopic = !topicInfo.unit;
          pendingTopicTitle = isStandaloneTopic ? { hasTitle: topicInfo.hasTitle } : null;
          return;
        }

        if (pendingTopicTitle) {
          if (cv7991IsTopicTitleContinuation(line)) {
            chapter = cv7991CleanChapterTitle(`${chapter}${pendingTopicTitle.hasTitle ? ' ' : '. '}${line}`);
            unit = chapter;
            pendingTopicTitle.hasTitle = true;
            return;
          }
          pendingTopicTitle = null;
        }

        const chapterMatch = line.match(/^CHƯƠNG\s+.+$/i);
        if (chapterMatch) {
          pushCurrent();
          current = null;
          if (isStandaloneTopic) {
            unit = '';
            format = '';
            level = '';
          }
          isStandaloneTopic = false;
          chapter = cv7991CleanChapterTitle(line);
          return;
        }

        const lessonInfo = cv7991ParseLessonLine(line);
        if (lessonInfo) {
          pushCurrent();
          current = null;
          chapter = lessonInfo.chapter || chapter || 'Chưa phân chương';
          unit = lessonInfo.unit;
          isStandaloneTopic = false;
          format = 'mc';
          level = '';
          ensureItem();
          return;
        }

        const taggedQuestionMatch = line.match(/^Câu\s*(\d+)\s*[\(\[]\s*(NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]]\s*[\.\:\)]\s*/i);
        if (taggedQuestionMatch) {
          pushCurrent();
          if (!CV7991_FORMATS.includes(format)) format = 'mc';
          level = cv7991LevelKeyFromQuestionTag(taggedQuestionMatch[2]);
          ensureFallbackUnit();
          ensureItem();
          current = makeCurrent(line.replace(taggedQuestionMatch[0], 'Câu. '));
          return;
        }

        const headingFormat = cv7991DetectQuestionFormatHeading(line);
        if (headingFormat) {
          pushCurrent();
          current = null;
          if (cv7991ShouldDropQuestionFormat(headingFormat)) {
            format = '';
            level = '';
          } else {
            format = headingFormat;
            level = '';
          }
          return;
        }

        if (cv7991ShouldRemoveBankMetaLine(line)) return;

        const cellMatch = line.match(/^(?:Ô\s*\(n\)\s*:\s*)?(TNKQ\s+nhiều\s+lựa\s+chọn|TNKQ\s+đúng\s*[-–—\/]\s*sai|TNKQ\s+trả\s+lời\s+ngắn|Tự\s*luận)\s*[-–—]\s*(Biết|Hiểu|Vận dụng cao|VDC|Vận dụng)\s*$/i);
        if (cellMatch) {
          pushCurrent();
          current = null;
          const nextFormat = cv7991FormatKey(cellMatch[1]);
          if (cv7991ShouldDropQuestionFormat(nextFormat)) {
            format = '';
            level = '';
            return;
          }
          format = nextFormat;
          level = cv7991LevelKey(cellMatch[2]);
          ensureFallbackUnit();
          ensureItem();
          return;
        }

        const levelLineMatch = line.match(/^Mức\s*độ\s*:\s*(Nhận\s*biết|Biết|Thông\s*hiểu|Hiểu|Vận\s*dụng\s*cao|VDC|Vận\s*dụng|VD)\s*$/i);
        if (levelLineMatch) {
          level = cv7991LevelKeyFromQuestionTag(levelLineMatch[1]);
          return;
        }

        const questionStartMatch = line.match(/^Câu\s+\d+\s*[\.\:\)]\s*/i);
        if (questionStartMatch) {
          pushCurrent();
          if (!CV7991_FORMATS.includes(format)) format = 'mc';
          if (!level) level = 'b';
          ensureFallbackUnit();
          ensureItem();
          current = makeCurrent(line.replace(questionStartMatch[0], 'Câu. '));
          return;
        }

        if (/^Ghi\s*chú\s*:/i.test(line)) {
          pushCurrent();
          current = null;
          return;
        }

        if (!current) return;

        const answerHints = cv7991ExtractAnswerHintsFromLine(line);
        if (answerHints.length) {
          line = cv7991StripAnswerHintTokens(line);
          if (format === 'mc') {
            if (!current.answer) current.answer = answerHints[0] || '';
          } else if (format === 'tf') {
            if (!Array.isArray(current.tfTrueLetters)) current.tfTrueLetters = [];
            answerHints.forEach((letter) => {
              const normalized = String(letter || '').trim().toLowerCase();
              if (/^[a-d]$/.test(normalized) && !current.tfTrueLetters.includes(normalized)) current.tfTrueLetters.push(normalized);
            });
          }
          if (!line) return;
        } else if (/\[\[\s*CV7991_ANS\s*:/i.test(line)) {
          // Phòng thủ: token nội bộ không bao giờ được đi tiếp sang nội dung đề Word.
          line = cv7991StripAnswerHintTokens(line);
          if (!line) return;
        }

        if (/^Đáp án\s*:/i.test(line)) {
          const answerText = line.replace(/^Đáp án\s*:\s*/i, '').trim();
          if (format === 'mc') {
            const answerLetter = (answerText.match(/[A-D]/i) || [])[0] || '';
            current.answer = answerLetter ? answerLetter.toUpperCase() : answerText;
          } else if (format === 'essay') {
            current.inAnswer = true;
            current.inGuide = false;
            current.answerLines = [`Đáp án và thang điểm: ${answerText || '1,00 điểm'}`];
          } else {
            current.answer = answerText;
          }
          return;
        }

        const markingMatch = line.match(/^(Hướng dẫn chấm|Đáp án và thang điểm)\s*[:：]\s*(.*)$/i);
        if (markingMatch) {
          if (format === 'essay') {
            current.inAnswer = true;
            current.inGuide = false;
            current.answerLines = [`${String(markingMatch[1] || 'Đáp án và thang điểm').trim()}: ${String(markingMatch[2] || '').trim()}`.trim()];
          }
          return;
        }

        if (current.inAnswer) {
          if (!Array.isArray(current.answerLines)) current.answerLines = [];
          current.answerLines.push(line);
          return;
        }

        const guideStart = cv7991GuideStartInfo(line);
        if (guideStart) {
          current.inGuide = true;
          if (!Array.isArray(current.guideLines)) current.guideLines = [];
          if (guideStart.text) current.guideLines.push(guideStart.text);
          return;
        }
        if (cv7991CompetencyFromLine(line)) return;
        if (current.inGuide) {
          if (!Array.isArray(current.guideLines)) current.guideLines = [];
          current.guideLines.push(line);
          return;
        }
        current.lines.push(line);
      });

      pushCurrent();
      const items = Array.from(itemMap.values())
        .filter((item) => CV7991_FORMATS.some((fmt) => CV7991_LEVELS.some((lvl) => Number(item && item.available && item.available[`${fmt}_${lvl}`] || 0) > 0)))
        .map((item, idx) => Object.assign({}, item, { index: idx + 1 }));
      Object.defineProperty(bank, '_items', { value: items, enumerable: false });
      return bank;
    }

    // Ngân hàng trên máy chủ được tổ chức theo thư mục: mỗi bài là một file .docx.
    // Phần mềm ưu tiên files.php để tự nhận các file mới; nếu PHP không hoạt động sẽ dùng
    // index.json trong thư mục môn. Không dùng lại file ngân hàng gộp kiểu cũ.
    const CV7991_BANK_LIST_ENDPOINT = '/downloads/Ngan_hang_de/files.php';
    const CV7991_BANK_LOADER_VERSION = '7.0-multi-format';

    const CV7991_PROTECTED_BANK_API = '/api/ngan-hang/tai-file';

    function cv7991RequireLoggedInToken() {
      const token = String(state && state.token || '').trim();
      if (!token) {
        throw new Error('Bạn cần đăng nhập MVIP trước khi sử dụng ngân hàng câu hỏi của MVIP.');
      }
      return token;
    }

    function cv7991ProtectedBankRelativePath(url) {
      const raw = String(url || '').trim();
      if (!raw) throw new Error('Thiếu đường dẫn file Word của bài đã chọn.');

      let pathname = '';
      try {
        pathname = decodeURIComponent(new URL(raw, window.location.href).pathname || '').replace(/\\/g, '/');
      } catch (_) {
        throw new Error('Đường dẫn file Word của bài đã chọn không hợp lệ.');
      }

      const marker = '/downloads/Ngan_hang_de/';
      const index = pathname.toLowerCase().indexOf(marker.toLowerCase());
      if (index < 0) {
        throw new Error('File Word chưa nằm trong thư mục ngân hàng câu hỏi được bảo vệ.');
      }

      const relative = pathname.slice(index + marker.length).replace(/^\/+/, '');
      const parts = relative.split('/');
      if (!relative || !/\.docx$/i.test(relative) || parts.some((part) => !part || part === '.' || part === '..')) {
        throw new Error('Đường dẫn file Word của bài đã chọn không hợp lệ.');
      }
      return relative;
    }

    async function cv7991FetchProtectedBankFile(url, options = {}) {
      const token = cv7991RequireLoggedInToken();
      const relativePath = cv7991ProtectedBankRelativePath(url);
      const endpoint = new URL(CV7991_PROTECTED_BANK_API, window.location.href);
      endpoint.searchParams.set('path', relativePath);

      const response = await fetch(endpoint.href, {
        method: String(options.method || 'GET').toUpperCase(),
        cache: options.cache || 'no-store',
        headers: {
          'Accept': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
          'Authorization': `Bearer ${token}`,
        },
      });

      if (!response.ok) {
        let detail = '';
        try {
          const data = await response.clone().json();
          detail = String(data && data.detail || '').trim();
        } catch (_) {}
        if (response.status === 401 || response.status === 422) {
          throw new Error(detail || 'Phiên đăng nhập không hợp lệ. Bạn đăng nhập lại MVIP.');
        }
        if (response.status === 403) {
          throw new Error(detail || 'Tài khoản không được phép tải file ngân hàng câu hỏi này.');
        }
        if (response.status === 404) {
          throw new Error(detail || 'Không tìm thấy file Word của bài đã chọn trên máy chủ.');
        }
        throw new Error(detail || `Không tải được file Word (${response.status}).`);
      }
      return response;
    }

    function cv7991SelectedBankDescriptor() {
      const select = els.cv7991QuestionBankSelect;
      const option = select && select.options && select.selectedIndex >= 0 ? select.options[select.selectedIndex] : null;
      const url = String(select && select.value || option && option.value || '').trim();
      return {
        url,
        label: String(option && option.textContent || url).trim(),
        folder: String(option && option.dataset && option.dataset.bankFolder || '').trim(),
        legacyUrl: String(option && option.dataset && option.dataset.legacyUrl || '').trim(),
        listEndpoint: String(option && option.dataset && option.dataset.listEndpoint || '').trim(),
      };
    }

    function cv7991IsDocxBankUrl(url) {
      return /\.docx(?:$|[?#])/i.test(String(url || '').trim());
    }

    function cv7991NormalizeBankFolderUrl(url) {
      const raw = String(url || '').trim();
      if (!raw) return '';
      try {
        const parsed = new URL(raw, window.location.href);
        parsed.hash = '';
        parsed.search = '';
        if (!parsed.pathname.endsWith('/')) parsed.pathname += '/';
        return parsed.href;
      } catch (_) {
        return raw.endsWith('/') ? raw : `${raw}/`;
      }
    }

    function cv7991BankFolderKey(descriptor, folderUrl) {
      const explicit = String(descriptor && descriptor.folder || '').replace(/\\/g, '/').replace(/^\/+|\/+$/g, '').trim();
      if (explicit) return explicit;
      try {
        const pathname = decodeURIComponent(new URL(folderUrl, window.location.href).pathname || '').replace(/\\/g, '/');
        const marker = '/downloads/Ngan_hang_de/';
        const idx = pathname.toLowerCase().indexOf(marker.toLowerCase());
        if (idx >= 0) return pathname.slice(idx + marker.length).replace(/^\/+|\/+$/g, '');
      } catch (_) {}
      return '';
    }

    function cv7991NaturalFileCompare(a, b) {
      return String(a && a.name || '').localeCompare(String(b && b.name || ''), 'vi', { numeric: true, sensitivity: 'base' });
    }

    function cv7991NormalizeDiscoveredBankFiles(rawFiles, folderUrl) {
      const output = [];
      const seen = new Set();
      let folderParsed = null;
      try { folderParsed = new URL(cv7991NormalizeBankFolderUrl(folderUrl), window.location.href); } catch (_) {}
      const source = Array.isArray(rawFiles) ? rawFiles : [];
      source.forEach((entry) => {
        const item = (entry && typeof entry === 'object') ? entry : { name: entry };
        let candidate = String(item.url || item.href || item.path || item.file || item.name || '').trim();
        if (!candidate || /^~\$/i.test(candidate.split(/[\\/]/).pop() || '')) return;
        let fileUrl = '';
        try {
          const isPlainName = !/[\\/]/.test(candidate) && !/^[a-z][a-z0-9+.-]*:/i.test(candidate);
          fileUrl = new URL(isPlainName ? encodeURIComponent(candidate) : candidate, folderParsed ? folderParsed.href : folderUrl).href;
        } catch (_) {
          return;
        }
        if (!cv7991IsDocxBankUrl(fileUrl)) return;
        try {
          const parsed = new URL(fileUrl, window.location.href);
          if (folderParsed) {
            const basePath = folderParsed.pathname.endsWith('/') ? folderParsed.pathname : `${folderParsed.pathname}/`;
            if (parsed.origin !== folderParsed.origin || !parsed.pathname.startsWith(basePath)) return;
            const relative = parsed.pathname.slice(basePath.length);
            if (!relative || relative.includes('/')) return;
          }
        } catch (_) {}
        const key = fileUrl.replace(/#.*$/, '');
        if (seen.has(key)) return;
        seen.add(key);
        let name = String(item.name || '').trim();
        if (!name) {
          try { name = decodeURIComponent(new URL(fileUrl).pathname.split('/').pop() || ''); } catch (_) { name = fileUrl.split('/').pop() || fileUrl; }
        }
        if (/^~\$/i.test(name)) return;
        output.push({
          name,
          url: fileUrl,
          size: Math.max(0, Number(item.size || 0) || 0),
          mtime: item.mtime || item.modified || item.lastModified || '',
          chapter: String(item.chapter || '').trim(),
          unit: String(item.unit || '').trim(),
          unitKey: String(item.unitKey || '').trim(),
          lessonNo: Math.max(0, Number(item.lessonNo || 0) || 0),
          available: item.available && typeof item.available === 'object' ? Object.assign({}, item.available) : null,
          requirements: item.requirements && typeof item.requirements === 'object' ? Object.assign({}, item.requirements) : null,
          items: Array.isArray(item.items) ? item.items.map((metaItem) => Object.assign({}, metaItem, {
            available: metaItem && metaItem.available && typeof metaItem.available === 'object' ? Object.assign({}, metaItem.available) : null,
            requirements: metaItem && metaItem.requirements && typeof metaItem.requirements === 'object' ? Object.assign({}, metaItem.requirements) : null,
          })) : [],
          availabilityKnown: item.availabilityKnown !== undefined ? !!item.availabilityKnown : !!item.available,
          metadataVersion: Math.max(0, Number(item.metadataVersion || 0) || 0),
          metadataError: String(item.metadataError || '').trim(),
        });
      });
      return output.sort(cv7991NaturalFileCompare);
    }

    function cv7991MergeBankFileMetadata(baseFiles, metadataFiles) {
      const metaByName = new Map();
      (Array.isArray(metadataFiles) ? metadataFiles : []).forEach((item) => {
        const name = String(item && item.name || '').trim().toLowerCase();
        if (name) metaByName.set(name, item);
      });
      return (Array.isArray(baseFiles) ? baseFiles : []).map((file) => {
        const meta = metaByName.get(String(file && file.name || '').trim().toLowerCase());
        if (!meta) return file;
        return Object.assign({}, meta, file, {
          chapter: String(meta.chapter || file.chapter || '').trim(),
          unit: String(meta.unit || file.unit || '').trim(),
          unitKey: String(meta.unitKey || file.unitKey || '').trim(),
          lessonNo: Math.max(0, Number(meta.lessonNo || file.lessonNo || 0) || 0),
          available: meta.available && typeof meta.available === 'object' ? Object.assign({}, meta.available) : (file.available || null),
          requirements: meta.requirements && typeof meta.requirements === 'object' ? Object.assign({}, meta.requirements) : (file.requirements || null),
          items: Array.isArray(meta.items) && meta.items.length ? meta.items.map((item) => Object.assign({}, item)) : (Array.isArray(file.items) ? file.items : []),
          availabilityKnown: meta.availabilityKnown !== undefined ? !!meta.availabilityKnown : (file.availabilityKnown !== undefined ? !!file.availabilityKnown : !!meta.available),
          metadataVersion: Math.max(0, Number(meta.metadataVersion || file.metadataVersion || 0) || 0),
          metadataError: String(meta.metadataError || file.metadataError || '').trim(),
        });
      });
    }

    // Cache TRÊN TRÌNH DUYỆT chỉ dành cho DANH MỤC bài + metadata/số lượng câu.
    // Không lưu mini-DOCX/nội dung câu hỏi: phần đó vẫn tải đúng câu cần dùng bằng cache:no-store.
    // Mỗi Lớp-Môn có một bản cache riêng. Khi mở lại, MVIP gửi yêu cầu có điều kiện tới
    // index.json (ETag/Last-Modified); máy chủ trả 304 nếu không đổi, nên không tải lại danh mục.
    const CV7991_CATALOG_CACHE_DB_NAME = 'mvip_question_bank_catalog_metadata_v1';
    const CV7991_CATALOG_CACHE_DB_VERSION = 1;
    const CV7991_CATALOG_CACHE_STORE = 'catalogs';

    function cv7991CatalogBrowserCacheKey(descriptor, url) {
      const folderUrl = cv7991NormalizeBankFolderUrl(url);
      const folderKey = cv7991BankFolderKey(descriptor, folderUrl);
      return folderKey
        ? `folder:${folderKey.toLowerCase()}`
        : `url:${String(folderUrl || url || '').replace(/#.*$/, '')}`;
    }

    function cv7991OpenCatalogCacheDb() {
      if (typeof indexedDB === 'undefined') return Promise.resolve(null);
      return new Promise((resolve) => {
        let settled = false;
        try {
          const request = indexedDB.open(CV7991_CATALOG_CACHE_DB_NAME, CV7991_CATALOG_CACHE_DB_VERSION);
          request.onupgradeneeded = () => {
            const db = request.result;
            if (!db.objectStoreNames.contains(CV7991_CATALOG_CACHE_STORE)) {
              db.createObjectStore(CV7991_CATALOG_CACHE_STORE, { keyPath: 'key' });
            }
          };
          request.onsuccess = () => {
            if (settled) return;
            settled = true;
            resolve(request.result || null);
          };
          request.onerror = () => {
            if (settled) return;
            settled = true;
            resolve(null);
          };
          request.onblocked = () => {
            if (settled) return;
            settled = true;
            resolve(null);
          };
        } catch (_) {
          resolve(null);
        }
      });
    }

    async function cv7991ReadCatalogBrowserCache(key) {
      const cacheKey = String(key || '').trim();
      if (!cacheKey) return null;
      const db = await cv7991OpenCatalogCacheDb();
      if (!db) return null;
      return await new Promise((resolve) => {
        try {
          const tx = db.transaction(CV7991_CATALOG_CACHE_STORE, 'readonly');
          const request = tx.objectStore(CV7991_CATALOG_CACHE_STORE).get(cacheKey);
          request.onsuccess = () => {
            const record = request.result || null;
            if (!record || String(record.loaderVersion || '') !== CV7991_BANK_LOADER_VERSION) {
              resolve(null);
              return;
            }
            resolve(record);
          };
          request.onerror = () => resolve(null);
          tx.oncomplete = () => { try { db.close(); } catch (_) {} };
          tx.onabort = () => { try { db.close(); } catch (_) {} };
        } catch (_) {
          try { db.close(); } catch (_) {}
          resolve(null);
        }
      });
    }

    async function cv7991WriteCatalogBrowserCache(key, catalog, validator = null) {
      const cacheKey = String(key || '').trim();
      if (!cacheKey || !catalog || !Array.isArray(catalog.items) || !catalog.items.length) return false;
      const db = await cv7991OpenCatalogCacheDb();
      if (!db) return false;
      const record = {
        key: cacheKey,
        loaderVersion: CV7991_BANK_LOADER_VERSION,
        validator: validator && typeof validator === 'object' ? validator : null,
        catalog: {
          source: 'mvip-catalog',
          url: String(catalog.url || ''),
          label: String(catalog.label || ''),
          folderUrl: String(catalog.folderUrl || ''),
          discoveryMethod: String(catalog.discoveryMethod || ''),
          signature: String(catalog.signature || ''),
          files: Array.isArray(catalog.files) ? catalog.files : [],
          items: Array.isArray(catalog.items) ? catalog.items : [],
          fileCount: Math.max(0, Number(catalog.fileCount || 0) || 0),
          metadataCount: Math.max(0, Number(catalog.metadataCount || 0) || 0),
          loadedAt: Number(catalog.loadedAt || Date.now()) || Date.now(),
        },
        updatedAt: Date.now(),
      };
      return await new Promise((resolve) => {
        try {
          const tx = db.transaction(CV7991_CATALOG_CACHE_STORE, 'readwrite');
          tx.objectStore(CV7991_CATALOG_CACHE_STORE).put(record);
          tx.oncomplete = () => {
            try { db.close(); } catch (_) {}
            resolve(true);
          };
          tx.onerror = () => {
            try { db.close(); } catch (_) {}
            resolve(false);
          };
          tx.onabort = () => {
            try { db.close(); } catch (_) {}
            resolve(false);
          };
        } catch (_) {
          try { db.close(); } catch (_) {}
          resolve(false);
        }
      });
    }

    function cv7991ManifestValidatorFromResponse(response, manifestName, data = null) {
      const signature = String(data && data.signature || '').trim();
      const etag = String(response && (response.headers.get('ETag') || response.headers.get('etag')) || '').trim();
      const lastModified = String(response && (response.headers.get('Last-Modified') || response.headers.get('last-modified')) || '').trim();
      const size = String(response && (response.headers.get('Content-Length') || response.headers.get('content-length')) || '').trim();
      return { manifestName: String(manifestName || ''), signature, etag, lastModified, size };
    }

    function cv7991ManifestValidatorsEqual(a, b) {
      if (!a || !b) return false;
      if (String(a.manifestName || '') !== String(b.manifestName || '')) return false;
      const aSig = String(a.signature || '').trim();
      const bSig = String(b.signature || '').trim();
      if (aSig && bSig) return aSig === bSig;
      const aEtag = String(a.etag || '').trim();
      const bEtag = String(b.etag || '').trim();
      if (aEtag && bEtag) return aEtag === bEtag;
      const aLm = String(a.lastModified || '').trim();
      const bLm = String(b.lastModified || '').trim();
      const aSize = String(a.size || '').trim();
      const bSize = String(b.size || '').trim();
      return !!(aLm && bLm && aLm === bLm && (!aSize || !bSize || aSize === bSize));
    }

    async function cv7991CheckCachedCatalogManifest(descriptor, cachedRecord, setStatus) {
      const status = typeof setStatus === 'function' ? setStatus : (() => {});
      const selectedUrl = String(descriptor && descriptor.url || '').trim();
      if (!selectedUrl || cv7991IsDocxBankUrl(selectedUrl)) return null;
      const folderUrl = cv7991NormalizeBankFolderUrl(selectedUrl);
      const cachedValidator = cachedRecord && cachedRecord.validator && typeof cachedRecord.validator === 'object'
        ? cachedRecord.validator
        : null;

      for (const manifestName of ['index.json', 'files.json', 'manifest.json']) {
        try {
          const manifestUrl = new URL(manifestName, folderUrl);

          // Đã có cache: chỉ gửi HEAD rất nhỏ để so ETag/Last-Modified/Content-Length.
          // HEAD không tải nội dung index.json nên lần mở sau gần như tức thì.
          if (cachedRecord && cachedValidator && String(cachedValidator.manifestName || '') === manifestName) {
            status('Đang kiểm tra ngân hàng trên máy chủ có thay đổi không...', '');
            const headResponse = await fetch(manifestUrl.href, {
              method: 'HEAD',
              cache: 'no-store',
              headers: { 'Accept': 'application/json' },
            });
            if (headResponse.ok) {
              const headValidator = cv7991ManifestValidatorFromResponse(headResponse, manifestName, null);
              // HEAD không có body nên không có signature; giữ signature cũ chỉ để so
              // ETag/Last-Modified. Nếu hai dấu vết này trùng thì catalog chưa đổi.
              headValidator.signature = '';
              const cachedForHead = Object.assign({}, cachedValidator, { signature: '' });
              if (cv7991ManifestValidatorsEqual(cachedForHead, headValidator)) {
                return {
                  unchanged: true,
                  folderUrl,
                  manifestName,
                  validator: cachedValidator,
                  files: [],
                  data: null,
                };
              }
              // Nếu server không phát ETag/Last-Modified thì HEAD không đủ kết luận;
              // rơi xuống GET để đọc signature trong JSON.
            } else if (headResponse.status !== 405) {
              continue;
            }
          }

          // Lần đầu hoặc HEAD cho thấy đã thay đổi: lúc này mới tải index.json.
          status(cachedRecord ? 'Ngân hàng đã thay đổi, đang tải danh mục mới...' : `Đang đọc ${manifestName} lần đầu...`, '');
          const response = await fetch(manifestUrl.href, {
            method: 'GET',
            cache: 'no-store',
            headers: { 'Accept': 'application/json' },
          });
          if (!response.ok) continue;
          const data = await response.json();
          const rawFiles = Array.isArray(data) ? data : (data && Array.isArray(data.files) ? data.files : []);
          const files = cv7991NormalizeDiscoveredBankFiles(rawFiles, folderUrl);
          if (!files.length) continue;
          const validator = cv7991ManifestValidatorFromResponse(response, manifestName, data);
          if (cachedRecord && cv7991ManifestValidatorsEqual(cachedValidator, validator)) {
            return { unchanged: true, folderUrl, manifestName, validator, files: [], data };
          }
          return { unchanged: false, folderUrl, manifestName, validator, files, data };
        } catch (_) {
          // Nếu kiểm tra nhanh thất bại, caller sẽ dùng cache trình duyệt làm dự phòng
          // hoặc rơi về cơ chế khám phá đầy đủ hiện có.
        }
      }
      return null;
    }

    function cv7991ActivateBrowserCachedCatalog(cachedRecord, descriptor, url, note = '') {
      if (!cachedRecord || !cachedRecord.catalog) return null;
      const cached = cachedRecord.catalog;
      if (!Array.isArray(cached.items) || !cached.items.length || !Array.isArray(cached.files) || !cached.files.length) return null;

      // Danh mục này là của ngân hàng MVIP. Phải chuyển nguồn sang MVIP TRƯỚC khi
      // kích hoạt catalog; nếu không cv7991ActiveMvipCatalog() sẽ trả null ở lần mở
      // thứ hai (khi dùng cache trình duyệt) dù catalog đã có đầy đủ.
      selectCv7991BankSource('mvip');

      state.cv7991BankCatalog = Object.assign({}, cached, {
        source: 'mvip-catalog',
        url: String(url || cached.url || ''),
        label: String(descriptor && descriptor.label || cached.label || ''),
        loadedAt: Date.now(),
        browserCached: true,
      });
      cv7991RefreshBankEditorsPreservingSelection();
      const msg = note || `Đã dùng danh mục ${state.cv7991BankCatalog.items.length} bài đã lưu trên trình duyệt; ngân hàng trên máy chủ chưa thay đổi.`;
      setCv7991MvipBankStatus(msg, 'ok');
      setCv7991BankStatus(msg, 'ok');
      return state.cv7991BankCatalog;
    }

    async function cv7991FetchBankManifestMetadata(folderUrl, status, discoveryErrors) {
      for (const manifestName of ['index.json', 'files.json', 'manifest.json']) {
        try {
          status(`Đang đọc danh mục nhẹ từ ${manifestName}...`, '');
          const manifestUrl = new URL(manifestName, folderUrl);
          manifestUrl.searchParams.set('_mvip', String(Date.now()));
          const response = await fetch(manifestUrl.href, { cache: 'no-store' });
          if (!response.ok) {
            if (Array.isArray(discoveryErrors)) discoveryErrors.push(`${manifestName}: HTTP ${response.status}`);
            continue;
          }
          const data = await response.json();
          const rawFiles = Array.isArray(data) ? data : (data && Array.isArray(data.files) ? data.files : []);
          const files = cv7991NormalizeDiscoveredBankFiles(rawFiles, folderUrl);
          if (files.length) return { files, manifestName, data };
          if (Array.isArray(discoveryErrors)) discoveryErrors.push(`${manifestName}: không có tên file .docx hợp lệ`);
        } catch (error) {
          if (Array.isArray(discoveryErrors)) discoveryErrors.push(`${manifestName}: ${error && error.message ? error.message : error}`);
        }
      }
      return null;
    }

    async function cv7991DiscoverBankFiles(descriptor, setStatus) {
      const status = typeof setStatus === 'function' ? setStatus : (() => {});
      const selectedUrl = String(descriptor && descriptor.url || '').trim();
      if (!selectedUrl) return { files: [], method: 'none', folderUrl: '', discoveryErrors: ['Chưa chọn đường dẫn ngân hàng đề.'] };
      if (cv7991IsDocxBankUrl(selectedUrl)) {
        return {
          files: [{ name: decodeURIComponent(selectedUrl.split('/').pop().split('?')[0] || 'ngan_hang.docx'), url: selectedUrl }],
          method: 'single',
          folderUrl: '',
          discoveryErrors: [],
          staticManifest: false,
        };
      }

      const folderUrl = cv7991NormalizeBankFolderUrl(selectedUrl);
      const folderKey = cv7991BankFolderKey(descriptor, folderUrl);
      const discoveryErrors = [];
      const dynamicMap = new Map();
      const dynamicMethods = [];
      let dynamicSignature = '';

      const addDynamicFiles = (rawFiles, methodName) => {
        const normalized = cv7991NormalizeDiscoveredBankFiles(rawFiles, folderUrl);
        normalized.forEach((item) => {
          const key = String(item && item.url || '').replace(/#.*$/, '');
          if (key && !dynamicMap.has(key)) dynamicMap.set(key, item);
        });
        if (normalized.length && methodName && !dynamicMethods.includes(methodName)) dynamicMethods.push(methodName);
        return normalized.length;
      };

      // Dùng files.php chung ở thư mục Ngan_hang_de. Nếu PHP không hoạt động,
      // phần mềm sẽ đọc index.json nhẹ trong thư mục môn.
      const endpointCandidates = [];
      const endpointSeen = new Set();
      const pushEndpoint = (url, kind, label) => {
        try {
          const href = new URL(url, window.location.href).href;
          if (!endpointSeen.has(href)) {
            endpointSeen.add(href);
            endpointCandidates.push({ href, kind, label });
          }
        } catch (_) {}
      };

      const explicitEndpoint = String(descriptor && descriptor.listEndpoint || '').trim();
      if (explicitEndpoint) pushEndpoint(explicitEndpoint, 'central', 'files.php được cấu hình');
      pushEndpoint(CV7991_BANK_LIST_ENDPOINT, 'central', 'files.php dùng chung');

      for (const candidate of endpointCandidates) {
        try {
          status(`Đang lấy danh sách file Word từ ${candidate.label}...`, '');
          const endpointUrl = new URL(candidate.href, window.location.href);
          if (candidate.kind === 'central' && folderKey) endpointUrl.searchParams.set('folder', folderKey);
          endpointUrl.searchParams.set('_mvip', String(Date.now()));
          const response = await fetch(endpointUrl.href, {
            cache: 'no-store',
            headers: { 'Accept': 'application/json' },
          });
          if (!response.ok) throw new Error(`HTTP ${response.status}`);
          const contentType = String(response.headers.get('content-type') || '').toLowerCase();
          const text = await response.text();
          let data = null;
          try {
            data = JSON.parse(text);
          } catch (_) {
            const preview = text.replace(/\s+/g, ' ').trim().slice(0, 90);
            throw new Error(`không trả về JSON${contentType ? ` (${contentType})` : ''}${preview ? `: ${preview}` : ''}`);
          }
          if (data && data.ok === false) throw new Error(String(data.error || 'máy chủ báo lỗi'));
          const count = addDynamicFiles(data && data.files, candidate.label);
          if (count) dynamicSignature = String(data && data.signature || dynamicSignature || '');
          else discoveryErrors.push(`${candidate.label}: máy chủ trả về 0 file .docx`);
        } catch (error) {
          discoveryErrors.push(`${candidate.label}: ${error && error.message ? error.message : error}`);
        }
      }

      if (dynamicMap.size) {
        const dynamicFiles = Array.from(dynamicMap.values()).sort(cv7991NaturalFileCompare);
        // Luôn đọc index.json nhẹ trong thư mục môn và coi metadataVersion mới nhất
        // ở đây là nguồn số lượng câu chính thức. Như vậy giao diện biết ngay ô nào
        // có 0 câu mà KHÔNG phải tải/giải nén từng file Word ở trình duyệt.
        const manifestMeta = await cv7991FetchBankManifestMetadata(folderUrl, status, discoveryErrors);
        return {
          files: manifestMeta ? cv7991MergeBankFileMetadata(dynamicFiles, manifestMeta.files) : dynamicFiles,
          method: `server-list:${dynamicMethods.join('+') || 'files.php'}${manifestMeta ? `+metadata:${manifestMeta.manifestName}` : ''}`,
          folderUrl,
          signature: String(manifestMeta && manifestMeta.data && manifestMeta.data.signature || dynamicSignature || ''),
          discoveryErrors,
          staticManifest: false,
          metadataManifestName: manifestMeta && manifestMeta.manifestName || '',
        };
      }

      // files.php không trả về danh sách thì đọc manifest tĩnh trong thư mục môn.
      // Không thử PROPFIND hoặc mở trực tiếp thư mục vì máy chủ chủ động chặn
      // hai kiểu yêu cầu này và sẽ tạo lỗi 405/403 trong Console.
      // Manifest là danh sách tĩnh nên phải được tạo lại sau khi thêm/xóa file Word.
      for (const manifestName of ['index.json', 'files.json', 'manifest.json']) {
        try {
          status(`Đang kiểm tra ${manifestName} trong thư mục ngân hàng đề...`, '');
          const manifestUrl = new URL(manifestName, folderUrl);
          manifestUrl.searchParams.set('_mvip', String(Date.now()));
          const response = await fetch(manifestUrl.href, { cache: 'no-store' });
          if (!response.ok) {
            discoveryErrors.push(`${manifestName}: HTTP ${response.status}`);
            continue;
          }
          const data = await response.json();
          const rawFiles = Array.isArray(data) ? data : (data && Array.isArray(data.files) ? data.files : []);
          const files = cv7991NormalizeDiscoveredBankFiles(rawFiles, folderUrl);
          if (files.length) {
            return {
              files,
              method: `manifest:${manifestName}`,
              folderUrl,
              signature: String(data && data.signature || ''),
              discoveryErrors,
              staticManifest: true,
              manifestName,
            };
          }
          discoveryErrors.push(`${manifestName}: không có tên file .docx hợp lệ`);
        } catch (error) {
          discoveryErrors.push(`${manifestName}: ${error && error.message ? error.message : error}`);
        }
      }

      // Không quay lại file ngân hàng gộp kiểu cũ, vì yêu cầu hiện tại là mỗi bài một file.
      return { files: [], method: 'none', folderUrl, signature: '', discoveryErrors, staticManifest: false };
    }

    function cv7991EmptyAvailableMetadata() {
      return { mc_b: 0, mc_h: 0, mc_v: 0, mc_vdc: 0, tf_b: 0, tf_h: 0, tf_v: 0, tf_vdc: 0, short_b: 0, short_h: 0, short_v: 0, short_vdc: 0, essay_b: 0, essay_h: 0, essay_v: 0, essay_vdc: 0 };
    }

    function cv7991CatalogLessonFromFileName(fileInfo, fileIndex) {
      const name = String(fileInfo && fileInfo.name || `Bai_${fileIndex + 1}.docx`).trim();
      const stem = name.replace(/\.[^.]+$/, '');
      let lessonNo = Math.max(0, Number(fileInfo && fileInfo.lessonNo || 0) || 0);
      if (!lessonNo) {
        const match = stem.match(/(?:^|[_\-\s])B(?:AI)?0*(\d+)(?:[_\-\s]|$)/i) || stem.match(/Bài\s*0*(\d+)/i);
        if (match) lessonNo = Math.max(0, parseInt(match[1], 10) || 0);
      }
      if (!lessonNo) lessonNo = fileIndex + 1;
      let title = stem
        .replace(/^.*?(?:^|[_\-\s])B(?:AI)?0*\d+(?:[_\-\s]|$)/i, '')
        .replace(/[_\-]+/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
      if (!title) title = stem.replace(/[_\-]+/g, ' ').replace(/\s+/g, ' ').trim();
      if (title) title = title.charAt(0).toUpperCase() + title.slice(1);
      return {
        chapter: String(fileInfo && fileInfo.chapter || '').trim() || 'Chưa phân chương',
        unit: String(fileInfo && fileInfo.unit || '').trim() || `Bài ${lessonNo}. ${title || `Nội dung ${lessonNo}`}`,
        unitKey: String(fileInfo && fileInfo.unitKey || '').trim(),
        lessonNo,
        available: fileInfo && fileInfo.available && typeof fileInfo.available === 'object' ? Object.assign({}, fileInfo.available) : null,
        requirements: fileInfo && fileInfo.requirements && typeof fileInfo.requirements === 'object' ? Object.assign({}, fileInfo.requirements) : {},
        availabilityKnown: fileInfo && fileInfo.availabilityKnown !== undefined ? !!fileInfo.availabilityKnown : !!(fileInfo && fileInfo.available),
        metadataVersion: Math.max(0, Number(fileInfo && fileInfo.metadataVersion || 0) || 0),
        availabilityParsed: false,
      };
    }

    function cv7991CatalogItemsFromFiles(files) {
      const items = [];
      const seen = new Set();
      (Array.isArray(files) ? files : []).forEach((fileInfo, fileIndex) => {
        const metadataItems = Array.isArray(fileInfo && fileInfo.items) && fileInfo.items.length
          ? fileInfo.items
          : [cv7991CatalogLessonFromFileName(fileInfo, fileIndex)];
        metadataItems.forEach((metaItem, fileItemIndex) => {
          const fallback = cv7991CatalogLessonFromFileName(fileInfo, fileIndex);
          const unit = String(metaItem && metaItem.unit || fallback.unit || '').trim();
          if (!unit) return;
          const unitKey = String(metaItem && metaItem.unitKey || '').trim() || cv7991UnitKey(unit);
          const dedupeKey = `${String(fileInfo && fileInfo.url || '')}|${unitKey}|${fileItemIndex}`;
          if (seen.has(dedupeKey)) return;
          seen.add(dedupeKey);
          const available = metaItem && metaItem.available && typeof metaItem.available === 'object'
            ? Object.assign({}, metaItem.available)
            : (fallback.available ? Object.assign({}, fallback.available) : null);
          items.push({
            index: items.length + 1,
            chapter: String(metaItem && metaItem.chapter || fallback.chapter || '').trim() || 'Chưa phân chương',
            unit,
            unitKey,
            lessonNo: Math.max(0, Number(metaItem && metaItem.lessonNo || fallback.lessonNo || 0) || 0),
            requirements: Object.assign({}, fallback.requirements || {}, metaItem && metaItem.requirements || {}),
            available,
            availabilityKnown: metaItem && metaItem.availabilityKnown !== undefined
              ? !!metaItem.availabilityKnown
              : (fallback.availabilityKnown || !!available),
            metadataVersion: Math.max(0, Number(metaItem && metaItem.metadataVersion || fileInfo && fileInfo.metadataVersion || fallback.metadataVersion || 0) || 0),
            availabilityParsed: false,
            fileName: String(fileInfo && fileInfo.name || '').trim(),
            fileUrl: String(fileInfo && fileInfo.url || '').trim(),
            fileIndex,
            fileItemIndex,
          });
        });
      });
      return items.map((item, idx) => Object.assign({}, item, { index: idx + 1 }));
    }

    function cv7991CatalogMetadataCount(files) {
      return (Array.isArray(files) ? files : []).filter((file) => {
        if (Array.isArray(file && file.items) && file.items.some((item) => item && item.unit)) return true;
        return !!(file && file.unit);
      }).length;
    }

    async function loadCv7991QuestionBankCatalog(options = {}) {
      if (!String(state && state.token || '').trim()) {
        const message = 'Bạn cần đăng nhập MVIP trước khi sử dụng ngân hàng câu hỏi của MVIP.';
        setCv7991MvipBankStatus(message, 'err');
        setCv7991BankStatus(message, 'err');
        openAlertModal(message, 'Thông báo');
        return null;
      }
      const descriptor = cv7991SelectedBankDescriptor();
      const url = String(descriptor.url || '').trim();
      if (!url) {
        alert('Bạn chưa chọn ngân hàng câu hỏi.');
        return null;
      }
      const opts = options && typeof options === 'object' ? options : {};
      const suppressAlert = !!opts.suppressAlert;
      const existing = state.cv7991BankCatalog;
      if (!opts.force && existing && String(existing.url || '') === url && Array.isArray(existing.items) && existing.items.length) return existing;
      if (state.cv7991BankCatalogPromise && state.cv7991BankCatalogPromise.url === url) return await state.cv7991BankCatalogPromise.promise;

      const promise = (async () => {
        const cacheKey = cv7991CatalogBrowserCacheKey(descriptor, url);
        let cachedRecord = null;
        let quickManifest = null;
        try {
          cachedRecord = await cv7991ReadCatalogBrowserCache(cacheKey);
          quickManifest = await cv7991CheckCachedCatalogManifest(descriptor, cachedRecord, setCv7991BankStatus);

          // Trường hợp thường gặp: index.json không đổi -> server trả 304. Dùng ngay
          // danh mục/metadata đã lưu; không gọi files.php, không tải lại index.json.
          if (cachedRecord && quickManifest && quickManifest.unchanged) {
            return cv7991ActivateBrowserCachedCatalog(cachedRecord, descriptor, url);
          }

          // Nếu mạng tạm thời không kiểm tra được manifest nhưng đã có cache hợp lệ,
          // vẫn mở ngay danh mục cũ thay vì bắt giáo viên chờ hoặc tải lại Word.
          if (cachedRecord && !quickManifest && !opts.forceNetwork) {
            return cv7991ActivateBrowserCachedCatalog(
              cachedRecord,
              descriptor,
              url,
              `Đã dùng danh mục ${cachedRecord.catalog.items.length} bài lưu trên trình duyệt. Chưa kiểm tra được phiên bản mới trên máy chủ.`
            );
          }

          selectCv7991BankSource('mvip');
          setCv7991MvipBankStatus(cachedRecord ? 'Ngân hàng đã thay đổi, đang cập nhật riêng Lớp-Môn này...' : 'Đang tải danh mục bài lần đầu (chưa tải nội dung câu hỏi)...', '');
          setCv7991BankStatus(cachedRecord ? 'Ngân hàng đã thay đổi, đang cập nhật riêng Lớp-Môn này...' : 'Đang tải danh mục bài lần đầu (chưa tải nội dung câu hỏi)...', '');

          let discovery = null;
          // Nếu kiểm tra nhanh đã nhận được index.json mới, dùng luôn dữ liệu đó;
          // không cần gọi lại files.php hay tải manifest lần thứ hai.
          if (quickManifest && !quickManifest.unchanged && Array.isArray(quickManifest.files) && quickManifest.files.length) {
            discovery = {
              files: quickManifest.files,
              method: `browser-manifest:${quickManifest.manifestName}`,
              folderUrl: quickManifest.folderUrl || cv7991NormalizeBankFolderUrl(url),
              signature: String(quickManifest.data && quickManifest.data.signature || ''),
              discoveryErrors: [],
              staticManifest: true,
              manifestName: quickManifest.manifestName,
            };
          } else {
            discovery = await cv7991DiscoverBankFiles(descriptor, setCv7991BankStatus);
          }

          const files = Array.isArray(discovery && discovery.files) ? discovery.files : [];
          if (!files.length) {
            const folderLabel = descriptor.folder || discovery && discovery.folderUrl || descriptor.label || 'thư mục đã chọn';
            const detail = Array.isArray(discovery && discovery.discoveryErrors) && discovery.discoveryErrors.length
              ? ` Chi tiết: ${discovery.discoveryErrors.join(' | ')}`
              : '';
            throw new Error(`Chưa đọc được danh sách file .docx trong ${folderLabel}.${detail}`);
          }
          const items = cv7991CatalogItemsFromFiles(files);
          if (!items.length) throw new Error('Đã tìm thấy file Word nhưng chưa tạo được danh mục bài.');

          const previous = state.cv7991BankCatalog;
          const sameCatalog = previous && String(previous.url || '') === url && String(previous.signature || '') === String(discovery && discovery.signature || '');
          if (!sameCatalog) state.cv7991Bank = null;
          state.cv7991BankCatalog = {
            source: 'mvip-catalog',
            url,
            label: descriptor.label || '',
            folderUrl: discovery && discovery.folderUrl || '',
            discoveryMethod: discovery && discovery.method || '',
            signature: discovery && discovery.signature || '',
            files,
            items,
            fileCount: files.length,
            metadataCount: cv7991CatalogMetadataCount(files),
            loadedAt: Date.now(),
            browserCached: false,
          };

          // Lưu riêng catalog của Lớp-Môn vừa tải. Nội dung câu hỏi KHÔNG nằm ở đây.
          // Nếu lần này đi qua fallback discovery, vẫn thử lấy validator của index.json
          // để lần sau có thể nhận 304 và mở gần như tức thì.
          let validator = quickManifest && quickManifest.validator || null;
          if (!validator) {
            try {
              const validatorCheck = await cv7991CheckCachedCatalogManifest(descriptor, null, () => {});
              validator = validatorCheck && validatorCheck.validator || null;
            } catch (_) {}
          }
          await cv7991WriteCatalogBrowserCache(cacheKey, state.cv7991BankCatalog, validator);

          cv7991RefreshBankEditorsPreservingSelection();
          const metadataNote = state.cv7991BankCatalog.metadataCount < files.length
            ? ` ${files.length - state.cv7991BankCatalog.metadataCount} file chưa có siêu dữ liệu đầy đủ; nên tạo lại index.json để có đủ thống kê 4 dạng câu hỏi.`
            : '';
          const message = `Đã cập nhật danh mục ${items.length} bài của Lớp-Môn này và lưu trên trình duyệt. Những lần sau chỉ cập nhật lại khi index.json trên máy chủ thay đổi. Nội dung câu hỏi vẫn chỉ tải khi bấm Lưu hoặc Sinh đề.${metadataNote}`;
          setCv7991MvipBankStatus(message, state.cv7991BankCatalog.metadataCount < files.length ? '' : 'ok');
          setCv7991BankStatus(message, state.cv7991BankCatalog.metadataCount < files.length ? '' : 'ok');
          return state.cv7991BankCatalog;
        } catch (error) {
          // Nếu quá trình cập nhật mới gặp lỗi nhưng vẫn còn cache cũ thì ưu tiên
          // dùng cache cũ để không làm gián đoạn tiết dạy.
          if (cachedRecord && !opts.forceNetwork) {
            const fallback = cv7991ActivateBrowserCachedCatalog(
              cachedRecord,
              descriptor,
              url,
              `Không cập nhật được máy chủ lúc này; MVIP đang dùng danh mục ${cachedRecord.catalog.items.length} bài đã lưu trên trình duyệt.`
            );
            if (fallback) return fallback;
          }
          const message = `Không tải được danh mục ngân hàng câu hỏi: ${error.message || error}`;
          setCv7991MvipBankStatus(message, 'err');
          setCv7991BankStatus(message, 'err');
          if (!suppressAlert) alert(message);
          if (suppressAlert) throw new Error(message);
          return null;
        }
      })();
      state.cv7991BankCatalogPromise = { url, promise };
      try {
        return await promise;
      } finally {
        if (state.cv7991BankCatalogPromise && state.cv7991BankCatalogPromise.promise === promise) state.cv7991BankCatalogPromise = null;
      }
    }

    function cv7991CatalogFileIdentity(fileInfo) {
      return `${String(fileInfo && fileInfo.size || 0)}|${String(fileInfo && fileInfo.mtime || '')}`;
    }

    function cv7991FilesForRequests(requests, catalog) {
      const fileMap = new Map();
      const catalogItems = catalog && Array.isArray(catalog.items) ? catalog.items : [];
      (Array.isArray(requests) ? requests : []).forEach((request) => {
        let fileUrl = String(request && request.item && request.item.fileUrl || '').trim();
        let fileName = String(request && request.item && request.item.fileName || '').trim();
        let fileIndex = Math.max(0, Number(request && request.item && request.item.fileIndex || 0) || 0);
        if (!fileUrl) {
          const key = String(request && request.unitKey || '').trim();
          const found = catalogItems.find((item) => String(item && item.unitKey || '') === key);
          if (found) {
            fileUrl = String(found.fileUrl || '').trim();
            fileName = String(found.fileName || '').trim();
            fileIndex = Math.max(0, Number(found.fileIndex || 0) || 0);
          }
        }
        if (!fileUrl) return;
        const catalogFile = (catalog.files || []).find((file) => String(file && file.url || '') === fileUrl) || {};
        if (!fileMap.has(fileUrl)) fileMap.set(fileUrl, Object.assign({}, catalogFile, { url: fileUrl, name: fileName || catalogFile.name || `Bài ${fileIndex + 1}.docx`, fileIndex }));
      });
      return Array.from(fileMap.values()).sort((a, b) => Number(a.fileIndex || 0) - Number(b.fileIndex || 0));
    }

    function cv7991UpdateCatalogFromParsedFile(fileInfo, payload) {
      const catalog = state.cv7991BankCatalog;
      if (!catalog || !Array.isArray(catalog.items)) return;
      const fileUrl = String(fileInfo && fileInfo.url || '').trim();
      const parsedItems = Array.isArray(payload && payload.items) ? payload.items : [];
      const targets = catalog.items.filter((item) => String(item && item.fileUrl || '') === fileUrl);
      if (!targets.length || !parsedItems.length) return;
      targets.forEach((target, index) => {
        const parsed = parsedItems[index] || (parsedItems.length === 1 ? parsedItems[0] : null);
        if (!parsed) return;
        target.chapter = String(parsed.chapter || target.chapter || '').trim() || 'Chưa phân chương';
        target.unit = String(parsed.unit || target.unit || '').trim();
        target.unitKey = String(parsed.unitKey || cv7991UnitKey(parsed.unit) || target.unitKey || '').trim();
        target.requirements = Object.assign({}, target.requirements || {}, parsed.requirements || {});
        target.available = Object.assign(cv7991EmptyAvailableMetadata(), parsed.available || {});
        target.availabilityKnown = true;
        target.availabilityParsed = true;
        target.metadataVersion = Math.max(7, Number(target.metadataVersion || 0) || 0);
      });
      const fileRecord = (catalog.files || []).find((file) => String(file && file.url || '') === fileUrl);
      if (fileRecord && parsedItems.length === 1) {
        const parsed = parsedItems[0];
        fileRecord.chapter = parsed.chapter || fileRecord.chapter || '';
        fileRecord.unit = parsed.unit || fileRecord.unit || '';
        fileRecord.unitKey = parsed.unitKey || cv7991UnitKey(parsed.unit) || fileRecord.unitKey || '';
        fileRecord.available = Object.assign(cv7991EmptyAvailableMetadata(), parsed.available || {});
        fileRecord.availabilityKnown = true;
        fileRecord.metadataVersion = Math.max(7, Number(fileRecord.metadataVersion || 0) || 0);
      }
    }

    function cv7991ResolveRequestsAgainstLoadedBank(requests, parsedFiles, loadedBank) {
      (Array.isArray(requests) ? requests : []).forEach((request) => {
        const directKey = `${request.unitKey}|${request.format}|${request.level}`;
        if (loadedBank && Array.isArray(loadedBank[directKey])) return;
        const fileUrl = String(request && request.item && request.item.fileUrl || '').trim();
        const record = fileUrl && parsedFiles ? parsedFiles[fileUrl] : null;
        const parsedItems = record && record.payload && Array.isArray(record.payload.items) ? record.payload.items : [];
        const parsed = parsedItems.find((item) => {
          const key = String(item && (item.unitKey || cv7991UnitKey(item.unit)) || '').trim();
          return !!(loadedBank && Array.isArray(loadedBank[`${key}|${request.format}|${request.level}`]));
        }) || (parsedItems.length === 1 ? parsedItems[0] : null);
        if (!parsed) return;
        request.unitKey = String(parsed.unitKey || cv7991UnitKey(parsed.unit) || request.unitKey || '').trim();
        if (request.item) {
          request.item.unitKey = request.unitKey;
          request.item.unit = parsed.unit || request.item.unit;
          request.item.chapter = parsed.chapter || request.item.chapter;
          request.item.available = Object.assign(cv7991EmptyAvailableMetadata(), parsed.available || {});
          request.item.availabilityKnown = true;
          request.item.availabilityParsed = true;
          request.item.metadataVersion = Math.max(7, Number(request.item.metadataVersion || 0) || 0);
        }
      });
    }

    function cv7991QuestionCacheBankFolder(catalog) {
      const descriptor = cv7991SelectedBankDescriptor();
      const explicit = String(descriptor && descriptor.folder || '').replace(/\\/g, '/').replace(/^\/+|\/+$/g, '').trim();
      if (explicit) return explicit;
      const folderUrl = String(catalog && (catalog.folderUrl || catalog.url) || descriptor && descriptor.url || '').trim();
      return cv7991BankFolderKey(descriptor, folderUrl);
    }

    function cv7991QuestionCacheRequestMultiplier(request, options = {}) {
      const reason = String(options && options.reason || '').trim();
      if (reason !== 'generate-exams') return 1;
      const format = String(request && request.format || 'mc');
      const freezeEssay = !!(els.cv7991FreezeEssayCheckbox && els.cv7991FreezeEssayCheckbox.checked);
      const sameQuizShuffle = !!(els.cv7991SameQuizShuffleCheckbox && els.cv7991SameQuizShuffleCheckbox.checked);
      if (format === 'essay' && freezeEssay) return 1;
      if (format !== 'essay' && sameQuizShuffle) return 1;
      const mons = typeof selectedCv7991Mons === 'function' ? selectedCv7991Mons() : [];
      let codeMode = null;
      try { codeMode = typeof getCv7991GenerateExamCodeMode === 'function' ? getCv7991GenerateExamCodeMode() : null; } catch (_) {}
      if (codeMode && codeMode.mode === 'fixed_count') {
        return Math.max(1, Math.min(500, (Math.max(1, Number(codeMode.count || 1) || 1) * Math.max(1, mons.length))));
      }
      let studentCount = 0;
      (Array.isArray(mons) ? mons : []).forEach((mon) => {
        try { studentCount += sortedStudentKeysFromMap(classDataStudents(mon)).length; } catch (_) {}
      });
      return Math.max(1, Math.min(500, studentCount || 1));
    }

    function cv7991Base64UrlEncodeUtf8(value) {
      const bytes = new TextEncoder().encode(String(value == null ? '' : value));
      let binary = '';
      const chunkSize = 0x8000;
      for (let i = 0; i < bytes.length; i += chunkSize) {
        binary += String.fromCharCode(...bytes.subarray(i, i + chunkSize));
      }
      return btoa(binary).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
    }

    function cv7991QuestionApiGetBatches(bankFolder, apiRequests, endpointHref) {
      const batches = [];
      let current = [];
      const maxUrlLength = 5600;
      const urlBaseLength = String(endpointHref || '').length + 16;
      const encodedLength = (list) => {
        try {
          return cv7991Base64UrlEncodeUtf8(JSON.stringify({ bank: bankFolder, requests: list })).length;
        } catch (_) {
          return Number.MAX_SAFE_INTEGER;
        }
      };
      (Array.isArray(apiRequests) ? apiRequests : []).forEach((request) => {
        const candidate = current.concat([request]);
        if (current.length && urlBaseLength + encodedLength(candidate) > maxUrlLength) {
          batches.push(current);
          current = [request];
        } else {
          current = candidate;
        }
      });
      if (current.length) batches.push(current);
      return batches;
    }

    async function cv7991RequestServerQuestionCache(requests, catalog, options = {}) {
      const bankFolder = cv7991QuestionCacheBankFolder(catalog);
      if (!bankFolder) return null;
      const token = cv7991RequireLoggedInToken();
      const apiRoot = (typeof API_BASE === 'string' && API_BASE) ? API_BASE : 'https://api.mvip.vn';
      const endpoint = new URL('/api/ngan-hang/chon-cau-cache', apiRoot);
      const apiRequests = (Array.isArray(requests) ? requests : []).map((request) => ({
        unitKey: String(request && request.unitKey || request && request.item && request.item.unitKey || '').trim(),
        format: String(request && request.format || 'mc').trim(),
        level: String(request && request.level || 'b').trim(),
        count: Math.max(0, Number(request && request.count || 0) || 0),
        poolMultiplier: cv7991QuestionCacheRequestMultiplier(request, options),
      })).filter((request) => request.unitKey && request.count > 0);
      if (!apiRequests.length) return null;

      const totalRequested = apiRequests.reduce((sum, request) => sum + request.count * request.poolMultiplier, 0);
      setCv7991MvipBankStatus(`Máy chủ đang chọn đúng các câu cần dùng (${Math.min(totalRequested, 5000)} câu tối đa)...`, '');
      setCv7991BankStatus('Đang lấy các câu đã chọn từ cache máy chủ, không tải cả file Word...', '');

      try {
        // Dùng FastAPI ở api.mvip.vn. Không gọi PHP trong /downloads vì Nginx
        // của MVIP chủ động không thực thi PHP ở thư mục tải xuống (tránh HTTP 405).
        const response = await fetch(endpoint.href, {
          method: 'POST',
          cache: 'no-store',
          headers: {
            'Accept': 'application/json',
            'Content-Type': 'application/json',
            'Authorization': `Bearer ${token}`,
          },
          body: JSON.stringify({ bank: bankFolder, requests: apiRequests }),
        });
        let data = null;
        try { data = await response.json(); } catch (_) {}

        if (!response.ok) {
          if (response.status === 404 || response.status === 409 || response.status === 501) return null;
          let detail = '';
          if (data && typeof data.detail === 'string') detail = data.detail;
          else if (data && data.detail && typeof data.detail.message === 'string') detail = data.detail.message;
          else if (data && typeof data.error === 'string') detail = data.error;
          if (response.status === 401) throw new Error(detail || 'Phiên đăng nhập không hợp lệ. Bạn đăng nhập lại MVIP.');
          if (response.status === 403) throw new Error(detail || 'Tài khoản không được phép dùng ngân hàng câu hỏi này.');
          throw new Error(detail || `Máy chủ chưa trả được các câu đã chọn (HTTP ${response.status}).`);
        }
        if (!data || data.ok !== true || !Array.isArray(data.selected) || !data.selected.length) return null;
        return data;
      } catch (error) {
        if (error && /Ngân hàng chưa có cache|Failed to fetch|NetworkError|404|501/i.test(String(error.message || error))) return null;
        throw error;
      }
    }

    async function cv7991MapConcurrent(items, limit, worker) {
      const source = Array.isArray(items) ? items : [];
      const results = new Array(source.length);
      let cursor = 0;
      const count = Math.max(1, Math.min(Math.max(1, Number(limit || 1) || 1), source.length || 1));
      const runners = Array.from({ length: count }, async () => {
        while (true) {
          const index = cursor++;
          if (index >= source.length) break;
          results[index] = await worker(source[index], index);
        }
      });
      await Promise.all(runners);
      return results;
    }

    async function cv7991LoadQuestionsFromServerCache(requests, catalog, options = {}) {
      const selection = await cv7991RequestServerQuestionCache(requests, catalog, options);
      if (!selection) return null;
      const selected = Array.isArray(selection.selected) ? selection.selected : [];
      if (!selected.length) return null;
      let completed = 0;
      const totalBytes = selected.reduce((sum, item) => sum + Math.max(0, Number(item && item.size || 0) || 0), 0);
      const payloads = await cv7991MapConcurrent(selected, 4, async (item, index) => {
        const url = new URL(String(item && item.url || ''), window.location.href).href;
        const qid = String(item && item.id || `q${index + 1}`).trim();
        const displayName = `${String(item && item.sourceFile || 'MVIP').replace(/\.docx$/i, '')}_${qid}.docx`;
        const bankFile = await cv7991LoadBankFileBufferWithCache(url, () => {}, {
          size: Math.max(0, Number(item && item.size || 0) || 0),
        });
        const namespace = `qcache_${qid.replace(/[^a-zA-Z0-9_]+/g, '_').slice(0, 40)}`;
        const payload = await cv7991ParseQuestionBankDocxBuffer(bankFile.buffer, namespace, displayName);
        completed += 1;
        const kb = totalBytes > 0 ? `, tổng khoảng ${Math.max(1, Math.round(totalBytes / 1024))} KB` : '';
        const status = `Đang nạp đúng câu cần dùng: ${completed}/${selected.length}${kb}...`;
        setCv7991MvipBankStatus(status, '');
        setCv7991BankStatus(status, '');
        return { item, payload, fromCache: !!bankFile.fromCache, url };
      });

      const combined = cv7991CreateCombinedBankPayload();
      payloads.forEach((record) => {
        if (record && record.payload) cv7991MergeQuestionBankPayload(combined, record.payload);
      });
      const finalized = cv7991FinalizeCombinedBankPayload(combined);
      if (!finalized.count) return null;
      const selectedUrl = String(catalog && catalog.url || '');
      state.cv7991Bank = {
        source: 'mvip-question-cache',
        url: selectedUrl,
        folderUrl: catalog && catalog.folderUrl || '',
        discoveryMethod: 'server-question-cache',
        discoverySignature: String(selection.signature || catalog && catalog.signature || ''),
        bank: finalized.bank,
        items: finalized.items,
        specItems: [],
        count: finalized.count,
        images: finalized.images,
        tables: finalized.tables,
        equations: finalized.equations,
        figureMap: finalized.figureMap,
        figureDeclarations: finalized.figureDeclarations,
        figureUnresolved: finalized.figureUnresolved,
        figureUsedCodes: finalized.figureUsedCodes,
        loadedFiles: payloads.map((record) => ({
          name: record && record.item && record.item.sourceFile || '',
          url: record && record.url || '',
          count: Number(record && record.payload && record.payload.count || 0),
          fromCache: !!(record && record.fromCache),
        })),
        selectedQuestionIds: selected.map((item) => String(item && item.id || '')).filter(Boolean),
        fileCount: selected.length,
        loadedAt: Date.now(),
        partial: true,
        serverQuestionCache: true,
      };
      const mb = totalBytes > 0 ? totalBytes / (1024 * 1024) : 0;
      const sizeText = totalBytes > 0 ? (mb >= 1 ? `${mb.toFixed(2)} MB` : `${Math.max(1, Math.round(totalBytes / 1024))} KB`) : '';
      const message = `Đã nhận đúng ${finalized.count} câu từ cache máy chủ${sizeText ? ` (${sizeText})` : ''}; không tải toàn bộ file Word ngân hàng.`;
      setCv7991MvipBankStatus(message, 'ok');
      setCv7991BankStatus(message, 'ok');
      return state.cv7991Bank;
    }

    async function ensureCv7991QuestionBankForRequests(requests, options = {}) {
      if (!Array.isArray(requests) || !requests.length) return null;
      if (!isCv7991MvipBankSelected()) {
        if (state.cv7991Bank && state.cv7991Bank.fileName) return state.cv7991Bank;
        return await ensureCv7991SelectedQuestionBankReady(null, options);
      }
      if (!window.JSZip) throw new Error('Chưa tải được thư viện đọc file Word. Bạn kiểm tra Internet rồi thử lại.');
      const catalog = await ensureCv7991QuestionBankCatalogReady();
      if (!catalog) return null;
      // Bản v8: ưu tiên cache từng câu trên máy chủ. Máy người dùng chỉ tải đúng
      // số câu cần dùng; nếu máy chủ chưa được nâng cấp thì tự rơi về cơ chế Word cũ.
      const serverSelectedBank = await cv7991LoadQuestionsFromServerCache(requests, catalog, options);
      if (serverSelectedBank) return serverSelectedBank;
      const files = cv7991FilesForRequests(requests, catalog);
      if (!files.length) throw new Error('Không xác định được file Word tương ứng với các bài đã chọn. Hãy tạo lại index.json của ngân hàng câu hỏi.');

      const selectedUrl = String(catalog.url || '');
      const existingBank = state.cv7991Bank && state.cv7991Bank.source === 'mvip' && String(state.cv7991Bank.url || '') === selectedUrl ? state.cv7991Bank : null;
      const parsedFiles = Object.assign({}, existingBank && existingBank.parsedFiles || {});
      const loadKey = `${selectedUrl}|${files.map((file) => `${file.url}:${cv7991CatalogFileIdentity(file)}`).join('|')}`;
      if (state.cv7991BankLoadPromise && state.cv7991BankLoadPromise.key === loadKey) return await state.cv7991BankLoadPromise.promise;

      const promise = (async () => {
        const loadedNow = [];
        let cachedCount = 0;
        for (let index = 0; index < files.length; index += 1) {
          const fileInfo = files[index];
          const fileUrl = String(fileInfo.url || '').trim();
          const identity = cv7991CatalogFileIdentity(fileInfo);
          const oldRecord = parsedFiles[fileUrl];
          if (oldRecord && oldRecord.identity === identity && oldRecord.payload) continue;
          const fileName = String(fileInfo.name || `Bài ${index + 1}.docx`).trim();
          setCv7991MvipBankStatus(`Đang nạp bài đã chọn ${index + 1}/${files.length}: ${fileName}...`, '');
          setCv7991BankStatus(`Đang nạp bài đã chọn ${index + 1}/${files.length}: ${fileName}...`, '');
          const bankFile = await cv7991LoadBankFileBufferWithCache(fileUrl, (message) => {
            setCv7991BankStatus(`${fileName}: ${message}`, '');
          }, fileInfo);
          const namespace = cv7991BankFileNamespace(fileName, Math.max(0, Number(fileInfo.fileIndex || index) || index));
          const payload = await cv7991ParseQuestionBankDocxBuffer(bankFile.buffer, namespace, fileName);
          parsedFiles[fileUrl] = {
            url: fileUrl,
            name: fileName,
            identity,
            fileIndex: Math.max(0, Number(fileInfo.fileIndex || index) || index),
            payload,
            fromCache: !!bankFile.fromCache,
            loadedAt: Date.now(),
          };
          cv7991UpdateCatalogFromParsedFile(fileInfo, payload);
          loadedNow.push(fileName);
          if (bankFile.fromCache) cachedCount += 1;
        }

        const combined = cv7991CreateCombinedBankPayload();
        Object.values(parsedFiles)
          .sort((a, b) => Number(a.fileIndex || 0) - Number(b.fileIndex || 0))
          .forEach((record) => cv7991MergeQuestionBankPayload(combined, record.payload));
        const finalized = cv7991FinalizeCombinedBankPayload(combined);
        if (!finalized.count) throw new Error('Các file bài đã chọn không có câu hỏi hợp lệ.');
        const loadedFiles = Object.values(parsedFiles).map((record) => ({
          name: record.name,
          url: record.url,
          count: Number(record.payload && record.payload.count || 0),
          fromCache: !!record.fromCache,
        }));
        state.cv7991Bank = {
          source: 'mvip',
          url: selectedUrl,
          folderUrl: catalog.folderUrl || '',
          discoveryMethod: catalog.discoveryMethod || '',
          discoverySignature: catalog.signature || '',
          bank: finalized.bank,
          items: finalized.items,
          specItems: [],
          count: finalized.count,
          images: finalized.images,
          tables: finalized.tables,
          equations: finalized.equations,
          figureMap: finalized.figureMap,
          figureDeclarations: finalized.figureDeclarations,
          figureUnresolved: finalized.figureUnresolved,
          figureUsedCodes: finalized.figureUsedCodes,
          loadedFiles,
          parsedFiles,
          fileCount: loadedFiles.length,
          loadedAt: Date.now(),
          partial: loadedFiles.length < Number(catalog.fileCount || loadedFiles.length),
        };
        cv7991ResolveRequestsAgainstLoadedBank(requests, parsedFiles, finalized.bank);
        cv7991RefreshBankEditorsPreservingSelection();
        const selectedCount = files.length;
        const newNote = loadedNow.length
          ? ` Vừa tải ${loadedNow.length} file${cachedCount ? ` (${cachedCount} từ cache)` : ''}.`
          : ' Các file này đã có sẵn trong bộ nhớ.';
        const message = `Đã nạp nội dung ${selectedCount} bài cần dùng trong lần này, tổng ${finalized.count} câu đang sẵn sàng.${newNote} Bộ nhớ đang giữ ${loadedFiles.length}/${Number(catalog.fileCount || loadedFiles.length)} bài; các bài còn lại chưa được tải.`;
        setCv7991MvipBankStatus(message, 'ok');
        setCv7991BankStatus(message, 'ok');
        return state.cv7991Bank;
      })();
      state.cv7991BankLoadPromise = { key: loadKey, promise };
      try {
        return await promise;
      } finally {
        if (state.cv7991BankLoadPromise && state.cv7991BankLoadPromise.promise === promise) state.cv7991BankLoadPromise = null;
      }
    }

    function cv7991BankFileNamespace(fileName, index) {
      const stem = String(fileName || '')
        .replace(/\.[^.]+$/, '')
        .normalize('NFD').replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd').replace(/Đ/g, 'D')
        .replace(/[^a-zA-Z0-9]+/g, '_')
        .replace(/^_+|_+$/g, '')
        .slice(0, 42);
      return `f${String(Math.max(0, Number(index) || 0) + 1).padStart(3, '0')}_${stem || 'bai'}`;
    }

    function cv7991NamespaceTokenText(value, namespace) {
      const source = String(value == null ? '' : value);
      if (!namespace) return source;
      return source.replace(/\[\[CV7991_(IMG|TBL|OMML):([^\]]+)\]\]/g, (all, kind, id) => {
        return `[[CV7991_${kind}:${namespace}__${String(id || '').trim()}]]`;
      });
    }

    function cv7991MapStringsDeep(value, mapper) {
      if (typeof value === 'string') return mapper(value);
      if (!value || typeof value !== 'object') return value;
      if (typeof ArrayBuffer !== 'undefined' && (value instanceof ArrayBuffer || ArrayBuffer.isView(value))) return value;
      if (typeof Blob !== 'undefined' && value instanceof Blob) return value;
      if (Array.isArray(value)) return value.map((item) => cv7991MapStringsDeep(item, mapper));
      const proto = Object.getPrototypeOf(value);
      if (proto && proto !== Object.prototype) return value;
      const output = {};
      Object.keys(value).forEach((key) => { output[key] = cv7991MapStringsDeep(value[key], mapper); });
      return output;
    }

    function cv7991NamespaceQuestionBankPayload(payload, namespace, sourceName) {
      const mapper = (value) => cv7991NamespaceTokenText(value, namespace);
      const bank = {};
      Object.keys(payload && payload.bank || {}).forEach((key) => {
        const list = Array.isArray(payload.bank[key]) ? payload.bank[key] : [];
        bank[key] = list.map((question) => {
          const mapped = cv7991MapStringsDeep(question || {}, mapper);
          mapped.sourceFile = sourceName || mapped.sourceFile || '';
          return mapped;
        });
      });
      const rawItems = Array.isArray(payload && payload.items) ? payload.items : [];
      Object.defineProperty(bank, '_items', { value: rawItems.map((item) => Object.assign({}, item)), enumerable: false, configurable: true });

      const images = {};
      Object.keys(payload && payload.images || {}).forEach((id) => {
        const nextId = `${namespace}__${id}`;
        images[nextId] = Object.assign({}, payload.images[id], { relId: nextId, sourceFile: sourceName || '' });
      });

      const tables = {};
      Object.keys(payload && payload.tables || {}).forEach((id) => {
        const nextId = `${namespace}__${id}`;
        const mapped = cv7991MapStringsDeep(payload.tables[id], mapper);
        if (mapped && typeof mapped === 'object') mapped.id = nextId;
        tables[nextId] = mapped;
      });

      const equations = {};
      Object.keys(payload && payload.equations || {}).forEach((id) => {
        const nextId = `${namespace}__${id}`;
        const mapped = cv7991MapStringsDeep(payload.equations[id], mapper);
        if (mapped && typeof mapped === 'object') mapped.id = nextId;
        equations[nextId] = mapped;
      });

      const figureMap = {};
      Object.keys(payload && payload.figureMap || {}).forEach((code) => {
        figureMap[`${namespace}:${code}`] = `${namespace}__${payload.figureMap[code]}`;
      });
      const figureDeclarations = (payload && payload.figureDeclarations || []).map((item) => Object.assign({}, item, {
        code: `${namespace}:${String(item && item.code || '')}`,
        relId: `${namespace}__${String(item && item.relId || '')}`,
        sourceFile: sourceName || '',
      }));
      const figureUnresolved = (payload && payload.figureUnresolved || []).map((code) => `${sourceName || namespace}: ${code}`);
      const figureUsedCodes = (payload && payload.figureUsedCodes || []).map((code) => `${namespace}:${code}`);

      return {
        bank,
        items: rawItems,
        count: Number(payload && payload.count || 0) || 0,
        images,
        tables,
        equations,
        figureMap,
        figureDeclarations,
        figureUnresolved,
        figureUsedCodes,
      };
    }

    async function cv7991ParseQuestionBankDocxBuffer(buffer, namespace, sourceName) {
      const zip = await window.JSZip.loadAsync(buffer);
      const docEntry = zip.file('word/document.xml');
      if (!docEntry) throw new Error('File Word không có nội dung document.xml.');
      const xml = await docEntry.async('string');
      const imageMap = await cv7991ExtractDocxImages(zip);
      const wordStyleContext = await cv7991ExtractDocxStyleContext(zip);
      const tableMap = {};
      const equationMap = {};
      const questionTextRaw = cv7991QuestionTextFromDocXml(xml, imageMap, tableMap, equationMap, wordStyleContext);
      const figureTextResult = cv7991PrepareQuestionBankTextWithFigures(questionTextRaw);
      const fallbackUnit = String(sourceName || '').replace(/\.docx$/i, '').trim() || 'Nội dung trong tệp';
      const bank = parseCv7991QuestionBankText(figureTextResult.text, { fallbackUnit });
      const count = Object.values(bank).reduce((sum, list) => sum + (Array.isArray(list) ? list.length : 0), 0);
      if (!count) {
        throw new Error('Không nhận diện được câu hỏi. File không bắt buộc phải có tên CHƯƠNG/BÀI/CHỦ ĐỀ; chỉ cần nhận diện được dạng câu theo tiêu đề I/II/III/IV hoặc cấu trúc câu, kèm Câu n (NB/TH/VD/VDC) khi có.');
      }
      return cv7991NamespaceQuestionBankPayload({
        bank,
        items: Array.isArray(bank._items) ? bank._items : [],
        count,
        images: imageMap,
        tables: tableMap,
        equations: equationMap,
        figureMap: figureTextResult.figureMap || {},
        figureDeclarations: figureTextResult.figureDeclarations || [],
        figureUnresolved: figureTextResult.figureUnresolved || [],
        figureUsedCodes: figureTextResult.figureUsedCodes || [],
      }, namespace, sourceName);
    }

    function cv7991CreateCombinedBankPayload() {
      return {
        bank: {},
        items: [],
        itemMap: new Map(),
        count: 0,
        images: {},
        tables: {},
        equations: {},
        figureMap: {},
        figureDeclarations: [],
        figureUnresolved: [],
        figureUsedCodes: [],
      };
    }

    function cv7991MergeQuestionBankPayload(target, payload) {
      Object.keys(payload && payload.bank || {}).forEach((key) => {
        if (!target.bank[key]) target.bank[key] = [];
        target.bank[key].push(...(Array.isArray(payload.bank[key]) ? payload.bank[key] : []));
      });
      (Array.isArray(payload && payload.items) ? payload.items : []).forEach((item) => {
        const unitKey = String(item && (item.unitKey || cv7991UnitKey(item.unit)) || '').trim();
        if (!unitKey) return;
        if (!target.itemMap.has(unitKey)) {
          const copy = Object.assign({}, item, {
            unitKey,
            available: Object.assign(cv7991EmptyAvailableCounts(), item && item.available || {}),
            requirements: Object.assign({}, item && item.requirements || {}),
          });
          target.itemMap.set(unitKey, copy);
          target.items.push(copy);
          return;
        }
        const current = target.itemMap.get(unitKey);
        const incomingAvailable = Object.assign(cv7991EmptyAvailableCounts(), item && item.available || {});
        Object.keys(incomingAvailable).forEach((key) => {
          current.available[key] = Math.max(0, Number(current.available[key] || 0)) + Math.max(0, Number(incomingAvailable[key] || 0));
        });
        if ((!current.chapter || current.chapter === 'Chưa phân chương') && item && item.chapter) current.chapter = item.chapter;
        if (!current.unit && item && item.unit) current.unit = item.unit;
        const incomingReqs = item && item.requirements || {};
        current.requirements = current.requirements || {};
        CV7991_LEVELS.forEach((level) => {
          if (!current.requirements[level] && incomingReqs[level]) current.requirements[level] = incomingReqs[level];
        });
      });
      target.count += Math.max(0, Number(payload && payload.count || 0) || 0);
      Object.assign(target.images, payload && payload.images || {});
      Object.assign(target.tables, payload && payload.tables || {});
      Object.assign(target.equations, payload && payload.equations || {});
      Object.assign(target.figureMap, payload && payload.figureMap || {});
      target.figureDeclarations.push(...(payload && payload.figureDeclarations || []));
      target.figureUnresolved.push(...(payload && payload.figureUnresolved || []));
      target.figureUsedCodes.push(...(payload && payload.figureUsedCodes || []));
    }

    function cv7991FinalizeCombinedBankPayload(payload) {
      const items = payload.items.map((item, idx) => Object.assign({}, item, { index: idx + 1 }));
      Object.defineProperty(payload.bank, '_items', { value: items, enumerable: false, configurable: true });
      return Object.assign({}, payload, { items });
    }

    const CV7991_BANK_CACHE_DB_NAME = 'mvip_question_bank_cache_v2_protected';

    // Từ bản này MVIP không còn lưu file ngân hàng/câu hỏi vào IndexedDB của
    // trình duyệt. Máy chủ đã tách từng câu nên mỗi lần cần câu nào chỉ tải đúng
    // câu đó. Đồng thời xóa database cache cũ để giải phóng dung lượng máy người dùng.
    function cv7991DeleteLegacyBankCache() {
      if (typeof indexedDB === 'undefined') return;
      try {
        const request = indexedDB.deleteDatabase(CV7991_BANK_CACHE_DB_NAME);
        request.onerror = () => {};
        request.onblocked = () => {};
      } catch (_) {}
    }
    cv7991DeleteLegacyBankCache();

    async function cv7991LoadBankFileBufferWithCache(url, setStatus, knownFileMeta = null) {
      cv7991RequireLoggedInToken();
      const status = typeof setStatus === 'function' ? setStatus : (() => {});
      status('Đang tải đúng dữ liệu cần dùng từ máy chủ...', '');
      const response = await cv7991FetchProtectedBankFile(url, { cache: 'no-store' });
      const buffer = await response.arrayBuffer();
      const meta = {
        etag: String(response.headers.get('ETag') || response.headers.get('etag') || ''),
        lastModified: String(response.headers.get('Last-Modified') || response.headers.get('last-modified') || ''),
        size: Number(response.headers.get('Content-Length') || response.headers.get('content-length') || (buffer && buffer.byteLength) || 0) || 0,
      };
      return { buffer, fromCache: false, meta };
    }

    async function loadCv7991QuestionBank(options = {}) {
      return await loadCv7991QuestionBankCatalog(options);
    }

    async function loadCv7991QuestionBankFromFile(file) {
      if (!window.JSZip) {
        alert('Chưa tải được thư viện đọc file Word. Bạn kiểm tra Internet rồi thử lại.');
        return null;
      }
      if (!file) return null;
      try {
        selectCv7991BankSource('word');
        setCv7991WordBankStatus('Đang tải', '');
        setCv7991BankStatus(`Đang tải file Word: ${file.name}...`, '');
        const buffer = await file.arrayBuffer();
        const zip = await window.JSZip.loadAsync(buffer);
        const docEntry = zip.file('word/document.xml');
        if (!docEntry) throw new Error('File Word không có nội dung document.xml.');
        const xml = await docEntry.async('string');
        const imageMap = await cv7991ExtractDocxImages(zip);
        const wordStyleContext = await cv7991ExtractDocxStyleContext(zip);
        const tableMap = {};
        const equationMap = {};
        const specItems = [];
        const questionTextRaw = cv7991QuestionTextFromDocXml(xml, imageMap, tableMap, equationMap, wordStyleContext);
        const figureTextResult = cv7991PrepareQuestionBankTextWithFigures(questionTextRaw);
        const bank = parseCv7991QuestionBankText(figureTextResult.text);
        const count = Object.values(bank).reduce((sum, list) => sum + (Array.isArray(list) ? list.length : 0), 0);
        if (!count) throw new Error('Không nhận diện được câu hỏi. File Word cần có BÀI... hoặc CHỦ ĐỀ... (CHƯƠNG... nếu có), rồi câu dạng Câu 1(NB):, Câu 2(TH):, Câu 3(VD): hoặc Câu 4(VDC):; mỗi câu có đủ A, B, C, D và phương án đúng được bôi đỏ hoặc gạch chân.');
        const rawItems = Array.isArray(bank._items) ? bank._items : [];
        const items = cv7991MergeBankItemsWithSpecItems(rawItems, specItems);
        state.cv7991Bank = { source: 'word', url: '', fileName: file.name, bank, items, specItems, count, images: imageMap, tables: tableMap, equations: equationMap, figureMap: figureTextResult.figureMap || {}, figureDeclarations: figureTextResult.figureDeclarations || [], figureUnresolved: figureTextResult.figureUnresolved || [], figureUsedCodes: figureTextResult.figureUsedCodes || [], loadedAt: Date.now() };
        renderCv7991Matrix();
        renderCv7991Spec();
        recalcCv7991Matrix();
        const successMessage = `Đã nạp từ Word "${file.name}": ${count} câu/hạng mục, ${items.length} nội dung/bài, ${Object.keys(tableMap).length} bảng, ${Object.keys(imageMap).length} ảnh, ${Object.keys(figureTextResult.figureMap || {}).length} mã hình, ${Object.keys(equationMap).length} công thức Equation.${(figureTextResult.figureUnresolved || []).length ? ` Còn mã hình chưa khớp ảnh: ${(figureTextResult.figureUnresolved || []).join(', ')}.` : ''} Bảng ma trận đã cập nhật theo file Word.`;
        setCv7991WordBankStatus(`Đã nạp xong "${file.name}": ${count} câu/hạng mục, ${items.length} nội dung/bài.`, 'ok');
        setCv7991BankStatus(successMessage, 'ok');
        return state.cv7991Bank;
      } catch (error) {
        const message = `Không nạp được file Word: ${error.message || error}`;
        setCv7991WordBankStatus(message, 'err');
        setCv7991BankStatus(message, 'err');
        alert(message);
        return null;
      }
    }

    function cv7991QuestionLimitMessage(requests, featureName, totalLimit, perCellLimit = CV7991_MAX_PER_CELL) {
      if (perCellLimit != null && requests.some((request) => request.count > perCellLimit)) {
        return `Mỗi ô trong ${featureName} chỉ được chọn tối đa ${perCellLimit} câu. Bạn vui lòng giảm số câu trong các ô vượt giới hạn.`;
      }
      const totalQuestions = requests.reduce((sum, request) => sum + request.count, 0);
      if (totalQuestions > totalLimit) {
        return `${featureName}: mỗi lần chỉ được chọn tối đa ${totalLimit} câu. Bạn đang chọn ${totalQuestions} câu; vui lòng giảm ít nhất ${totalQuestions - totalLimit} câu.`;
      }
      return '';
    }

    function validateCv7991ExamQuestionLimits(requests) {
      const message = cv7991QuestionLimitMessage(requests, 'Soạn đề kiểm tra', CV7991_EXAM_MAX_QUESTIONS);
      if (!message) return true;
      state.cv7991PendingExport = null;
      setCv7991BankStatus(message, 'err');
      openAlertModal(message, 'Vượt giới hạn số câu');
      return false;
    }

    function collectCv7991MatrixRequests() {
      const requests = [];
      if (!els.cv7991MatrixTable) return requests;
      cv7991Items().forEach((item, idx) => {
        CV7991_FORMATS.forEach((format) => {
          CV7991_LEVELS.forEach((level) => {
            const input = els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${idx}"][data-format="${format}"][data-level="${level}"]`);
            const count = cv7991IntegerValue(input);
            if (count > 0) requests.push({ item, unitKey: item.unitKey || cv7991UnitKey(item.unit), format, level, count });
          });
        });
      });
      return requests;
    }

    function pickCv7991Questions(bank, request, seedKey, selectionContext) {
      const pool = bank[`${request.unitKey}|${request.format}|${request.level}`] || [];
      if (!pool.length) return [];
      const count = Math.min(request.count, pool.length);
      const contextKey = `${request.unitKey}|${request.format}|${request.level}`;
      if (selectionContext) {
        if (!selectionContext[contextKey]) {
          selectionContext[contextKey] = {
            cursor: 0,
            ordered: cv7991ShuffleDeterministic(
              pool.map((item, idx) => ({ item, idx })),
              `${contextKey}|${seedKey}|${pool.length}`
            )
          };
        }
        const bucket = selectionContext[contextKey];
        const selected = [];
        for (let step = 0; step < count; step += 1) {
          selected.push(bucket.ordered[(bucket.cursor + step) % bucket.ordered.length].item);
        }
        bucket.cursor = (bucket.cursor + count) % bucket.ordered.length;
        return selected;
      }
      return cv7991ShuffleDeterministic(pool.map((item, idx) => ({ item, idx })), seedKey)
        .slice(0, count)
        .map((entry) => entry.item);
    }

    function cv7991WordFileKeepsAnswerMarks(filename) {
      const baseName = String(filename || '').split(/[\\/]/).pop().trim().toLowerCase();
      if (!baseName) return false;
      // Hai loại file này là ngân hàng/mẫu nhập liệu nên vẫn cần giữ dấu nhận biết đáp án.
      return /^ngan_hang_cau_hoi_on_tap_.*\.docx$/i.test(baseName)
        || /^mau_ngan_hang_cau_hoi_trac_nghiem_01_lua_chon\.docx$/i.test(baseName)
        || /^mau_ngan_hang_cau_hoi\.docx$/i.test(baseName);
    }

    function cv7991WordHexLooksRed(value) {
      let raw = String(value || '').replace(/^#/, '').trim().toLowerCase();
      if (!raw) return false;
      if (['red', 'darkred'].includes(raw)) return true;
      if (/^[0-9a-f]{3}$/i.test(raw)) raw = raw.split('').map((ch) => ch + ch).join('');
      if (/^[0-9a-f]{8}$/i.test(raw)) raw = raw.slice(raw.length - 6);
      if (!/^[0-9a-f]{6}$/i.test(raw)) return false;
      const red = parseInt(raw.slice(0, 2), 16);
      const green = parseInt(raw.slice(2, 4), 16);
      const blue = parseInt(raw.slice(4, 6), 16);
      return red >= 145 && green <= 150 && blue <= 150 && red >= green + 32 && red >= blue + 32;
    }

    function cv7991WordXmlAttr(tag, attrName) {
      const safeName = String(attrName || '').replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
      const match = String(tag || '').match(new RegExp(`(?:\\b(?:w:)?${safeName})\\s*=\\s*["']([^"']*)["']`, 'i'));
      return match ? String(match[1] || '') : '';
    }

    function cv7991SetWordXmlAttr(tag, attrName, value) {
      const source = String(tag || '');
      const safeName = String(attrName || '').replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
      const re = new RegExp(`((?:\\b(?:w:)?${safeName})\\s*=\\s*)["'][^"']*["']`, 'i');
      if (re.test(source)) return source.replace(re, `$1"${String(value || '')}"`);
      return source.replace(/\s*\/>$/, ` w:${attrName}="${String(value || '')}"/>`);
    }

    function cv7991NeutralizeRedWordXml(xmlText) {
      let output = String(xmlText || '');
      if (!output) return output;

      // Màu chữ đỏ (kể cả màu theme accent2) được chuyển thành đen.
      output = output.replace(/<w:color\b[^>]*\/>/gi, (tag) => {
        const value = cv7991WordXmlAttr(tag, 'val');
        const theme = cv7991WordXmlAttr(tag, 'themeColor').toLowerCase();
        if (!cv7991WordHexLooksRed(value) && !['red', 'darkred', 'accent2'].includes(theme)) return tag;
        return '<w:color w:val="000000"/>';
      });

      // Bỏ đánh dấu nền đỏ nếu file nguồn dùng highlight để nhận biết đáp án.
      output = output.replace(/<w:highlight\b[^>]*\/>/gi, (tag) => {
        const value = cv7991WordXmlAttr(tag, 'val');
        return /^(?:red|darkred)$/i.test(value) ? '' : tag;
      });

      // Một số file Word dùng tô nền ô/run thay vì màu chữ; đổi nền đỏ thành nền trắng.
      output = output.replace(/<w:shd\b[^>]*\/>/gi, (tag) => {
        const fill = cv7991WordXmlAttr(tag, 'fill');
        if (!cv7991WordHexLooksRed(fill)) return tag;
        let cleaned = cv7991SetWordXmlAttr(tag, 'fill', 'FFFFFF');
        cleaned = cleaned.replace(/\s+w:themeFill(?:Tint|Shade)?\s*=\s*["'][^"']*["']/gi, '');
        return cleaned;
      });
      return output;
    }

    async function cv7991NeutralizeDocxAnswerMarks(blob) {
      if (!window.JSZip || !blob) return blob;
      const inputBuffer = await blob.arrayBuffer();
      const zip = await window.JSZip.loadAsync(inputBuffer);
      const xmlEntries = Object.keys(zip.files || {}).filter((path) => /^word\/.*\.xml$/i.test(path) && !zip.files[path].dir);
      await Promise.all(xmlEntries.map(async (path) => {
        const originalXml = await zip.files[path].async('string');
        const cleanedXml = cv7991NeutralizeRedWordXml(originalXml);
        if (cleanedXml !== originalXml) zip.file(path, cleanedXml);
      }));
      return await zip.generateAsync({
        type: 'blob',
        mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
      });
    }

    async function cv7991PrepareWordBlobForDownload(filename, content, mime) {
      let blob = content instanceof Blob ? content : new Blob([content], { type: mime || 'application/octet-stream' });
      const normalizedName = String(filename || '').trim();
      if (!window.JSZip || !normalizedName) return blob;

      if (/\.docx$/i.test(normalizedName)) {
        if (!cv7991WordFileKeepsAnswerMarks(normalizedName)) {
          blob = await cv7991NeutralizeDocxAnswerMarks(blob);
        }
        return blob;
      }

      // Bộ đề cương là file ZIP chứa nhiều DOCX: chỉ giữ dấu đáp án trong file ngân hàng câu hỏi.
      if (/\.zip$/i.test(normalizedName)) {
        const packageZip = await window.JSZip.loadAsync(await blob.arrayBuffer());
        const docxPaths = Object.keys(packageZip.files || {}).filter((path) => /\.docx$/i.test(path) && !packageZip.files[path].dir);
        for (const path of docxPaths) {
          const innerName = String(path || '').split(/[\\/]/).pop();
          if (cv7991WordFileKeepsAnswerMarks(innerName)) continue;
          const innerBuffer = await packageZip.files[path].async('arraybuffer');
          const cleanedBlob = await cv7991NeutralizeDocxAnswerMarks(new Blob([innerBuffer], {
            type: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
          }));
          packageZip.file(path, await cleanedBlob.arrayBuffer());
        }
        blob = await packageZip.generateAsync({ type: 'blob', mimeType: mime || 'application/zip' });
      }
      return blob;
    }

    // Cho phần sinh đề Word kiểu cũ dùng chung cơ chế bảo vệ đáp án.
    window.mvipPrepareWordBlobForDownload = cv7991PrepareWordBlobForDownload;

    async function downloadCv7991File(filename, content, mime) {
      let blob = content instanceof Blob ? content : new Blob([content], { type: mime || 'application/octet-stream' });
      try {
        blob = await cv7991PrepareWordBlobForDownload(filename, blob, mime);
      } catch (error) {
        console.warn('Không xử lý được màu đáp án trong file Word, dùng file gốc:', error);
      }
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = filename;
      document.body.appendChild(a);
      a.click();
      a.remove();
      setTimeout(() => URL.revokeObjectURL(url), 1000);
    }

    function cv7991ClassLabelFromKey(key) {
      const raw = String(key || '').trim();
      if (!raw) return '';
      const parts = raw.split(/[-_–—]/).map((part) => part.trim()).filter(Boolean);
      if (parts.length >= 2) return parts[parts.length - 1] || raw;
      const trailingClass = raw.match(/(?:^|\s)(\d{1,2}[A-Za-zÀ-ỹ]*)\s*$/);
      if (trailingClass) return trailingClass[1];
      return raw;
    }

    function cv7991DisplayExamCode(code) {
      const raw = String(code == null ? '' : code).trim();
      return raw || '01';
    }

    function cv7991RomanNumeral(number) {
      const n = Math.max(1, Math.floor(Number(number) || 1));
      const values = [
        [1000, 'M'], [900, 'CM'], [500, 'D'], [400, 'CD'],
        [100, 'C'], [90, 'XC'], [50, 'L'], [40, 'XL'],
        [10, 'X'], [9, 'IX'], [5, 'V'], [4, 'IV'], [1, 'I']
      ];
      let rest = n;
      let out = '';
      values.forEach(([value, symbol]) => {
        while (rest >= value) {
          out += symbol;
          rest -= value;
        }
      });
      return out || 'I';
    }

    function cv7991FormatBaseTitle(format) {
      if (format === 'tf') return 'TRẮC NGHIỆM ĐÚNG - SAI';
      if (format === 'short') return 'TRẢ LỜI NGẮN';
      if (format === 'essay') return 'TỰ LUẬN';
      return 'TRẮC NGHIỆM NHIỀU LỰA CHỌN';
    }

    function cv7991DefaultSectionNumber(format) {
      const idx = CV7991_FORMATS.indexOf(format);
      return idx >= 0 ? idx + 1 : 1;
    }

    function cv7991FormatLabel(format, sectionNumber = null) {
      const number = sectionNumber == null ? cv7991DefaultSectionNumber(format) : sectionNumber;
      return `${cv7991RomanNumeral(number)}. ${cv7991FormatBaseTitle(format)}`;
    }

    function cv7991SectionInstruction(format) {
      if (format === 'tf') return 'Trong mỗi ý a), b), c), d), chọn Đúng hoặc Sai';
      if (format === 'short') return 'Ghi câu trả lời ngắn vào phần trả lời';
      if (format === 'essay') return 'Trình bày đầy đủ lời giải';
      return 'Khoanh tròn vào chữ cái đứng trước câu trả lời đúng';
    }

    function cv7991BuildSectionNumberMap(questions) {
      const source = Array.isArray(questions) ? questions : [];
      const map = {};
      let sectionNo = 1;
      CV7991_FORMATS.forEach((format) => {
        const hasFormat = source.some((question) => String(question && question.format || 'mc') === format);
        if (hasFormat) {
          map[format] = sectionNo;
          sectionNo += 1;
        }
      });
      return map;
    }

    function makeCv7991SectionHeadingRuns(format, sectionNumber = null) {
      const label = cv7991FormatLabel(format, sectionNumber);
      const instruction = cv7991SectionInstruction(format);
      if (instruction) {
        return [
          makeRun(`${label}:`, { bold: true }),
          makeRun(' '),
          makeRun(instruction, { italics: true }),
        ];
      }
      return [makeRun(label, { bold: true })];
    }

    function cv7991BankFormatLabel(format) {
      if (format === 'tf') return 'Đúng - Sai';
      if (format === 'short') return 'Trả lời ngắn';
      if (format === 'essay') return 'Tự luận';
      return 'Nhiều lựa chọn';
    }

    function cv7991LevelLabel(level) {
      if (level === 'h') return 'Hiểu';
      if (level === 'v') return 'Vận dụng';
      if (level === 'vdc') return 'Vận dụng cao';
      return 'Biết';
    }

    // Mẫu ngân hàng mới: ghi mức độ ngay sau số câu, ví dụ Câu 1 (NB).
    function cv7991LevelCode(level) {
      if (level === 'h') return 'TH';
      if (level === 'v') return 'VD';
      if (level === 'vdc') return 'VDC';
      return 'NB';
    }

    function cv7991NormalizeOptionText(text) {
      return String(text || '').replace(/\s+/g, ' ').trim();
    }

    function cv7991HasLatexText(text) {
      return /\$[^$]+\$|\\(frac|dfrac|sqrt|begin|end|angle|widehat|overline|overrightarrow|overparen|vec|sum|int|left|right)/i.test(String(text || ''));
    }

    function cv7991SeedNumber(value) {
      const text = String(value || '');
      let hash = 2166136261;
      for (let i = 0; i < text.length; i += 1) {
        hash ^= text.charCodeAt(i);
        hash = Math.imul(hash, 16777619);
      }
      return hash >>> 0;
    }

    function cv7991ShuffleDeterministic(items, seedKey) {
      const arr = (Array.isArray(items) ? items : []).map((item) => Object.assign({}, item));
      let seed = cv7991SeedNumber(seedKey) || 1;
      for (let i = arr.length - 1; i > 0; i -= 1) {
        seed = (Math.imul(seed, 1664525) + 1013904223) >>> 0;
        const j = seed % (i + 1);
        const tmp = arr[i];
        arr[i] = arr[j];
        arr[j] = tmp;
      }
      return arr;
    }

    function cv7991ParseInlineChoices(line, allowedLetters, options = {}) {
      const text = String(line || '').trim();
      const letters = String(allowedLetters || '').replace(/[^A-Za-z]/g, '');
      const opts = options || {};
      const minItems = Math.max(2, Number(opts.minItems) || 2);
      const requireCompleteSequence = !!opts.requireCompleteSequence;
      const allowLetterGaps = !!opts.allowLetterGaps;
      if (!text || !letters) return [];
      // Mặc định chỉ tách nhãn liền nhau; tự luận có thể bật bỏ qua chữ cái (e → g).
      // Bản sửa v3: không tách kiểu A...B chỉ vì trong nội dung A có chữ "B.".
      // - Nếu 4 phương án nằm cùng 1 dòng: yêu cầu đủ A→B→C→D và các nhãn cách nhau bằng tab/ít nhất 2 dấu cách.
      // - Nếu 2 dòng: chỉ tách cặp A→B khi dòng kế tiếp là cặp C→D và cũng đạt điều kiện khoảng cách.
      // Nhờ vậy "B." nằm giữa nội dung của A hoặc B không bị hiểu nhầm là phương án mới.
      const re = new RegExp(`(^|\\t+| {2,})([${letters}])[\\.\\)]\\s*`, 'g');
      const markers = [];
      let match;
      while ((match = re.exec(text))) {
        markers.push({
          index: match.index + (match[1] ? match[1].length : 0),
          letter: String(match[2] || ''),
          bodyStart: re.lastIndex
        });
      }
      if (markers.length < minItems) return [];

      /* Mẫu Word thực tế có thể viết C.3. / D.4. không có dấu cách sau nhãn.
         Việc nhận nhãn vẫn an toàn vì phía trước nhãn bắt buộc là đầu dòng,
         tab hoặc ít nhất 2 dấu cách, và phía dưới còn kiểm tra đúng thứ tự. */
      let best = [];
      markers.forEach((startMarker, startIndex) => {
        const startOrder = letters.indexOf(startMarker.letter);
        if (startOrder < 0) return;
        const selected = [startMarker];
        let expectedOrder = startOrder + 1;
        for (let i = startIndex + 1; i < markers.length && expectedOrder < letters.length; i += 1) {
          const markerOrder = letters.indexOf(markers[i].letter);
          if (markerOrder === expectedOrder || (allowLetterGaps && markerOrder > expectedOrder)) {
            selected.push(markers[i]);
            expectedOrder = markerOrder + 1;
          }
        }
        if (selected.length > best.length) best = selected;
      });

      if (best.length < minItems) return [];
      if (requireCompleteSequence && best.length !== letters.length) return [];
      return best.map((marker, index) => {
        const nextStart = index + 1 < best.length ? best[index + 1].index : text.length;
        return {
          letter: marker.letter,
          text: text.slice(marker.bodyStart, nextStart).trim()
        };
      }).filter((item) => item.letter);
    }

    function cv7991StripQuestionIntroLabel(text) {
      return String(text || '')
        // Bỏ nhãn đầu câu dạng "Câu 1.", "Câu 1:", "Cau 1)"...
        // Đặt bước này trước bước bỏ "Câu." để không còn sót lại "1." trong phần nội dung.
        .replace(/^\s*(?:Câu|Cau)\s*(?:số\s*)?\d+\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.\:\)\]：]\s*/i, '')
        // Bỏ nhãn tạm "Câu." do bộ tách câu nội bộ tạo ra.
        .replace(/^\s*Câu\s*[\.\:\)\]：]?\s*/i, '')
        .trim();
    }

    function cv7991ParseQuestionForPrint(question, displayNumber) {
      const lines = String(question && question.text || '').replace(/\r/g, '').split('\n')
        .map((line) => cv7991StripAnswerHintTokens(String(line || '').trim()))
        .filter(Boolean);
      const format = String(question && question.format || 'mc');
      const first = lines[0] || '';
      const promptParts = [cv7991StripQuestionIntroLabel(first)].filter(Boolean);
      const options = [];
      const statements = [];
      let optionLayoutColumns = 0;
      let statementLayoutColumns = 0;
      let standaloneOptionLines = 0;
      let standaloneStatementLines = 0;
      let lastOption = null;
      let lastStatement = null;
      const isAnswerLine = (line) => /^Đáp\s*án\s*:/i.test(line) || /^Hướng\s*dẫn\s*chấm\s*:/i.test(line);
      const itemLetters = (items) => (Array.isArray(items) ? items : []).map((item) => String(item && item.letter || '')).join('');
      const pushInlineOptions = (items) => {
        (Array.isArray(items) ? items : []).forEach((item) => {
          lastOption = { letter: String(item.letter || '').toUpperCase(), text: String(item.text || '').trim() };
          options.push(lastOption);
        });
        lastStatement = null;
      };
      const pushInlineStatements = (items) => {
        (Array.isArray(items) ? items : []).forEach((item) => {
          lastStatement = { letter: String(item.letter || '').toLowerCase(), text: String(item.text || '').trim() };
          statements.push(lastStatement);
        });
        lastOption = null;
      };
      for (let lineIndex = 1; lineIndex < lines.length; lineIndex += 1) {
        const line = lines[lineIndex];
        if (isAnswerLine(line)) continue;
        if (cv7991CompetencyFromLine(line)) continue;
        if (format === 'mc') {
          const inlineOptions = cv7991ParseInlineChoices(line, 'ABCD', { requireCompleteSequence: true });
          if (inlineOptions.length === 4) {
            optionLayoutColumns = 4;
            pushInlineOptions(inlineOptions);
            continue;
          }
          const pairOptions = cv7991ParseInlineChoices(line, 'ABCD', { minItems: 2 });
          if (pairOptions.length === 2 && itemLetters(pairOptions).toUpperCase() === 'AB') {
            const nextLine = lines[lineIndex + 1] || '';
            const nextPairOptions = !isAnswerLine(nextLine) ? cv7991ParseInlineChoices(nextLine, 'ABCD', { minItems: 2 }) : [];
            if (nextPairOptions.length === 2 && itemLetters(nextPairOptions).toUpperCase() === 'CD') {
              optionLayoutColumns = 2;
              pushInlineOptions(pairOptions);
              pushInlineOptions(nextPairOptions);
              lineIndex += 1;
              continue;
            }
          }
        } else if (format === 'tf') {
          const inlineStatements = cv7991ParseInlineChoices(line, 'abcd', { requireCompleteSequence: true });
          if (inlineStatements.length === 4) {
            statementLayoutColumns = 4;
            pushInlineStatements(inlineStatements);
            continue;
          }
          const pairStatements = cv7991ParseInlineChoices(line, 'abcd', { minItems: 2 });
          if (pairStatements.length === 2 && itemLetters(pairStatements) === 'ab') {
            const nextLine = lines[lineIndex + 1] || '';
            const nextPairStatements = !isAnswerLine(nextLine) ? cv7991ParseInlineChoices(nextLine, 'abcd', { minItems: 2 }) : [];
            if (nextPairStatements.length === 2 && itemLetters(nextPairStatements) === 'cd') {
              statementLayoutColumns = 2;
              pushInlineStatements(pairStatements);
              pushInlineStatements(nextPairStatements);
              lineIndex += 1;
              continue;
            }
          }
        }
        const optMatch = line.match(/^([A-D])[\.\)]\s*(.+)$/);
        const optOnlyMatch = line.match(/^([A-D])[\.\)]\s*$/);
        const tfMatch = line.match(/^([a-d])[\.\)]\s*(.+)$/);
        const tfOnlyMatch = line.match(/^([a-d])[\.\)]\s*$/);
        if (format === 'mc' && (optMatch || optOnlyMatch)) {
          const optLetter = (optMatch ? optMatch[1] : optOnlyMatch[1]).toUpperCase();
          const optBody = optMatch ? optMatch[2].trim() : '';
          const expectedLetter = ['A', 'B', 'C', 'D'][options.length] || '';
          const alreadyHasLetter = options.some((opt) => String(opt && opt.letter || '').toUpperCase() === optLetter);
          // Chỉ coi A./B./C./D. là phương án mới khi nhãn đi đúng thứ tự A→B→C→D.
          // Nếu Word tách nhãn A. và công thức/ảnh sang đoạn kế tiếp thì vẫn tạo phương án,
          // để dòng công thức/ảnh sau đó được ghép vào đúng khối phương án trước khi đảo.
          if (optLetter === expectedLetter && !alreadyHasLetter) {
            standaloneOptionLines += 1;
            lastOption = { letter: optLetter, text: optBody };
            options.push(lastOption);
            lastStatement = null;
          } else if (lastOption) {
            lastOption.text = `${lastOption.text} ${line}`.trim();
            lastStatement = null;
          } else {
            promptParts.push(line);
          }
        } else if (format === 'tf' && (tfMatch || tfOnlyMatch)) {
          const tfLetter = (tfMatch ? tfMatch[1] : tfOnlyMatch[1]).toLowerCase();
          const tfBody = tfMatch ? tfMatch[2].trim() : '';
          const expectedTfLetter = ['a', 'b', 'c', 'd'][statements.length] || '';
          const alreadyHasTfLetter = statements.some((item) => String(item && item.letter || '').toLowerCase() === tfLetter);
          if (tfLetter === expectedTfLetter && !alreadyHasTfLetter) {
            standaloneStatementLines += 1;
            lastStatement = { letter: tfLetter, text: tfBody };
            statements.push(lastStatement);
            lastOption = null;
          } else if (lastStatement) {
            lastStatement.text = `${lastStatement.text} ${line}`.trim();
            lastOption = null;
          } else {
            promptParts.push(line);
          }
        } else if (line) {
          if (format === 'mc' && lastOption) {
            lastOption.text = `${lastOption.text} ${line}`.trim();
          } else if (format === 'tf' && lastStatement) {
            lastStatement.text = `${lastStatement.text} ${line}`.trim();
          } else {
            promptParts.push(line);
          }
        }
      }
      if (!optionLayoutColumns && standaloneOptionLines >= 4 && options.length >= 4) optionLayoutColumns = 1;
      if (!statementLayoutColumns && standaloneStatementLines >= 4 && statements.length >= 4) statementLayoutColumns = 1;
      return {
        displayNumber,
        format,
        optionLayoutColumns,
        statementLayoutColumns,
        prompt: promptParts.join('\n').trim(),
        options: Array.isArray(question && question.printOptions) && question.printOptions.length
          ? question.printOptions.map((opt) => ({ letter: opt.letter, text: opt.text }))
          : options,
        statements: Array.isArray(question && question.printStatements) && question.printStatements.length
          ? question.printStatements.map((item) => ({ letter: item.letter, text: item.text }))
          : statements,
        answer: String(question && (question.printAnswer || question.answer) || '').trim(),
      };
    }

    function cv7991McAnswer(question) {
      const answer = String(question && question.answer || '').trim().toUpperCase();
      const match = answer.match(/[A-D]/);
      return match ? match[0] : '';
    }

    function cv7991StrictMcAnswer(question) {
      if (!question || question.mixerUnknownAnswer) return '';
      const raw = String(question.answer == null ? '' : question.answer).trim();
      if (!raw) return '';
      // Chỉ chấp nhận đúng một đáp án A/B/C/D, có thể có nhãn "Đáp án:".
      // Không quét một chữ A-D ngẫu nhiên nằm trong chuỗi.
      const match = raw.match(/^\s*(?:Đáp\s*án\s*:\s*)?([A-D])\s*[.)]?\s*$/i);
      return match ? String(match[1]).toUpperCase() : '';
    }

    function cv7991StrictTfAnswerItems(question) {
      const result = ['', '', '', ''];
      if (!question || question.mixerUnknownAnswer) return result;
      const raw = String(question.answer == null ? '' : question.answer)
        .replace(/\r/g, '')
        .replace(/^\s*Đáp\s*án\s*:\s*/i, '');
      if (!raw.trim()) return result;

      const indexByLetter = { a:0, b:1, c:2, d:3 };
      // Nhận các kiểu: a: Đ; a) Đ; a. Đ; a-Đ (và tương tự với S/Sai/Đúng).
      // Không dùng \b sau Đ/S vì ký tự Đ không phải lúc nào cũng được JS coi là "word character".
      const re = /(?:^|[;\n,])\s*([a-d])\s*[:：.)-]?\s*[`'"“”‘’]?\s*(Đúng|Dung|Sai|True|False|Đ|D|S|T|F)\s*[`'"“”‘’]?(?=\s*(?:[;,\n.]|$))/giu;
      let match;
      while ((match = re.exec(raw))) {
        const idx = indexByLetter[String(match[1] || '').toLowerCase()];
        const normalized = normalizeCv7991TfInternalValue(match[2]);
        if (Number.isInteger(idx) && normalized) result[idx] = normalized;
      }
      return result;
    }

    function cv7991StrictShortAnswer(question) {
      if (!question || question.mixerUnknownAnswer) return '';
      const raw = String(question.answer == null ? '' : question.answer).trim();
      if (!raw) return '';
      const cleaned = raw.replace(/^\s*Đáp\s*án\s*:\s*/i, '').trim();
      return cleaned;
    }

    function cv7991StrictAnswerState(question, format, subIndex = 0) {
      const kind = String(format || question && question.format || 'mc');
      if (kind === 'tf') {
        const items = cv7991StrictTfAnswerItems(question);
        const internal = items[Math.max(0, Number(subIndex) || 0)] || '';
        const value = cv7991TfAnswerDisplayValue(internal);
        return { value, missing: !value };
      }
      if (kind === 'short') {
        const value = cv7991StrictShortAnswer(question);
        return { value, missing: !value };
      }
      const value = cv7991StrictMcAnswer(question);
      return { value, missing: !value };
    }

    function cv7991StrictAnswerDisplay(question, format, subIndex = 0) {
      const state = cv7991StrictAnswerState(question, format, subIndex);
      // Với file đáp án của Soạn đề kiểm tra: nếu chưa nhận diện được đáp án
      // thì ghi dấu '-' vào ô, không tự điền A/B/C/D hay ký tự đáp án khác.
      return state.missing ? '-' : state.value;
    }

    function normalizeCv7991TfInternalValue(value) {
      const raw = String(value == null ? '' : value).trim();
      if (!raw) return '';
      const upper = raw.toUpperCase();
      const noAccent = upper.normalize ? upper.normalize('NFD').replace(/[\u0300-\u036f]/g, '') : upper;
      if (upper === 'Đ' || upper === 'D' || noAccent === 'DUNG' || noAccent === 'TRUE' || upper === 'T') return 'D';
      if (upper === 'A' || upper === 'B' || upper === 'C' || upper === 'S' || noAccent === 'SAI' || noAccent === 'FALSE' || upper === 'F') return 'A';
      return '';
    }

    function cv7991TfAnswerItems(question) {
      // Nếu câu đã được đảo ý, giữ nguyên đúng vị trí đáp án đi kèm từng ý;
      // ô nào chưa nhận diện được thì để trống, tuyệt đối không tự đổi thành Sai.
      if (Array.isArray(question && question.printAnswerItems) && question.printAnswerItems.length) {
        const normalized = question.printAnswerItems.slice(0, 4).map(normalizeCv7991TfInternalValue);
        while (normalized.length < 4) normalized.push('');
        return normalized;
      }

      const result = ['', '', '', ''];
      const answer = String(question && question.answer || '')
        .replace(/\r/g, '')
        .replace(/^\s*Đáp\s*án\s*:\s*/i, '');
      if (!answer.trim()) return result;

      const indexByLetter = { a:0, b:1, c:2, d:3 };
      // Nhận đồng thời: a: Đ; a) Đ; a. Đ; a-Đ ... và các giá trị S/Sai/Đúng/Dung/True/False.
      const re = /(?:^|[;\n,])\s*([a-d])\s*[:：.)-]?\s*[`'"“”‘’]?\s*(Đúng|Dung|Sai|True|False|Đ|D|S|T|F)\s*[`'"“”‘’]?(?=\s*(?:[;,\n.]|$))/giu;
      let match;
      while ((match = re.exec(answer))) {
        const idx = indexByLetter[String(match[1] || '').toLowerCase()];
        const normalized = normalizeCv7991TfInternalValue(match[2]);
        if (Number.isInteger(idx) && normalized) result[idx] = normalized;
      }
      return result;
    }

    function cv7991TfAnswerItemsForScan(question) {
      if (question && question.mixerUnknownAnswer) return ['', '', '', ''];
      return cv7991TfAnswerItems(question).map((value) => normalizeCv7991TfInternalValue(value) || '');
    }

    function cv7991TfAnswerDisplayValue(value) {
      const internal = normalizeCv7991TfInternalValue(value);
      if (internal === 'D') return 'Đ';
      if (internal === 'A') return 'S';
      return '';
    }

    function cv7991PrepareQuestionsForVersion(questions, seedKey) {
      const letters = ['A', 'B', 'C', 'D'];
      return (Array.isArray(questions) ? questions : []).map((question, index) => {
        const clone = Object.assign({}, question);
        const parsed = cv7991ParseQuestionForPrint(clone, index + 1);
        if (clone.format === 'mc' && parsed.options.length === 4) {
          const originalAnswer = cv7991McAnswer(clone) || 'A';
          let shuffled = cv7991ShuffleDeterministic(parsed.options, `${seedKey}|${index}|${parsed.prompt}|${originalAnswer}`);
          if (shuffled.every((opt, optIndex) => String(opt.letter || '').toUpperCase() === String(parsed.options[optIndex] && parsed.options[optIndex].letter || '').toUpperCase())) {
            shuffled = [shuffled[1], shuffled[2], shuffled[3], shuffled[0]].filter(Boolean);
          }
          let nextAnswer = originalAnswer;
          clone.printOptions = shuffled.map((opt, optIndex) => {
            const nextLetter = letters[optIndex] || opt.letter;
            if (String(opt.letter || '').toUpperCase() === originalAnswer) nextAnswer = nextLetter;
            return { letter: nextLetter, originalLetter: opt.letter, text: opt.text };
          });
          clone.printAnswer = nextAnswer;
        } else if (clone.format === 'tf') {
          const sourceAnswers = cv7991TfAnswerItems(clone);
          const shuffledStatements = cv7991ShuffleDeterministic(
            parsed.statements.map((item, itemIndex) => ({ letter: item.letter, text: item.text, answer: sourceAnswers[itemIndex] || '' })),
            `${seedKey}|${index}|tf|${parsed.prompt}`
          );
          clone.printStatements = shuffledStatements.map((item, itemIndex) => ({ letter: ['a', 'b', 'c', 'd'][itemIndex] || item.letter, originalLetter: item.letter, text: item.text }));
          clone.printAnswerItems = shuffledStatements.map((item) => item.answer || '');
        } else if (clone.format === 'short') {
          clone.printShortAnswer = String(clone.answer || '').replace(/^Đáp án\s*:\s*/i, '').trim();
        }
        return clone;
      });
    }

    function cv7991PermutationForIndex(options, permutationIndex) {
      const source = (Array.isArray(options) ? options : []).map((item) => Object.assign({}, item));
      const result = [];
      let n = Math.abs(Number(permutationIndex) || 0);
      for (let size = source.length; size > 0; size -= 1) {
        const idx = n % size;
        result.push(source.splice(idx, 1)[0]);
        n = Math.floor(n / size);
      }
      return result;
    }

    function cv7991OriginalParsedQuestion(question) {
      const clone = Object.assign({}, question || {});
      delete clone.printOptions;
      delete clone.printAnswer;
      delete clone.printStatements;
      delete clone.printAnswerItems;
      return cv7991ParseQuestionForPrint(clone, 1);
    }

    function cv7991OriginalTfAnswerItems(question) {
      const clone = Object.assign({}, question || {});
      delete clone.printAnswerItems;
      return cv7991TfAnswerItems(clone);
    }

    function cv7991DiversifyRepeatedMcOptions(versions) {
      const letters = ['A', 'B', 'C', 'D'];
      const statementLetters = ['a', 'b', 'c', 'd'];
      const groups = new Map();
      const tfGroups = new Map();
      (Array.isArray(versions) ? versions : []).forEach((version, versionIndex) => {
        (Array.isArray(version && version.questions) ? version.questions : []).forEach((question, questionIndex) => {
          if (!question) return;
          const parsed = cv7991OriginalParsedQuestion(question);
          if (question.format === 'mc') {
            if (parsed.options.length !== 4) return;
            const key = [
              parsed.prompt,
              parsed.options.map((opt) => `${opt.letter}:${cv7991NormalizeOptionText(opt.text)}`).join('|'),
              cv7991McAnswer(question) || 'A'
            ].join('::');
            if (!groups.has(key)) groups.set(key, []);
            groups.get(key).push({ versionIndex, questionIndex, question, parsed });
          } else if (question.format === 'tf') {
            if (parsed.statements.length !== 4) return;
            const key = [
              parsed.prompt,
              parsed.statements.map((item) => `${item.letter}:${cv7991NormalizeOptionText(item.text)}`).join('|'),
              cv7991OriginalTfAnswerItems(question).join('')
            ].join('::');
            if (!tfGroups.has(key)) tfGroups.set(key, []);
            tfGroups.get(key).push({ versionIndex, questionIndex, question, parsed });
          }
        });
      });
      groups.forEach((items, key) => {
        if (items.length < 2) return;
        const offset = cv7991SeedNumber(key) % 24;
        items.forEach((entry, occurrenceIndex) => {
          const originalAnswer = cv7991McAnswer(entry.question) || 'A';
          const permuted = cv7991PermutationForIndex(entry.parsed.options, offset + occurrenceIndex);
          let nextAnswer = originalAnswer;
          entry.question.printOptions = permuted.map((opt, optIndex) => {
            const nextLetter = letters[optIndex] || opt.letter;
            if (String(opt.letter || '').toUpperCase() === originalAnswer) nextAnswer = nextLetter;
            return { letter: nextLetter, originalLetter: opt.letter, text: opt.text };
          });
          entry.question.printAnswer = nextAnswer;
        });
      });
      tfGroups.forEach((items, key) => {
        if (items.length < 2) return;
        const offset = cv7991SeedNumber(key) % 24;
        items.forEach((entry, occurrenceIndex) => {
          const sourceAnswers = cv7991OriginalTfAnswerItems(entry.question);
          const sourceStatements = entry.parsed.statements.map((item, itemIndex) => ({
            letter: item.letter,
            text: item.text,
            answer: sourceAnswers[itemIndex] || ''
          }));
          const permuted = cv7991PermutationForIndex(sourceStatements, offset + occurrenceIndex);
          entry.question.printStatements = permuted.map((item, itemIndex) => ({
            letter: statementLetters[itemIndex] || item.letter,
            originalLetter: item.letter,
            text: item.text
          }));
          entry.question.printAnswerItems = permuted.map((item) => item.answer || '');
        });
      });
    }

    function cv7991BuildScanAnswerKeyArray(questions) {
      const parts = [];
      (Array.isArray(questions) ? questions : []).forEach((question) => {
        if (!question) return;
        if (question.format === 'essay' || question.format === 'short') return;
        if (question.format === 'tf') {
          parts.push(...cv7991TfAnswerItemsForScan(question));
        } else if (question.format === 'short') {
          parts.push('A');
        } else {
          parts.push(normalizeScanAnswerToken(question.printAnswer || cv7991McAnswer(question) || 'A'));
        }
      });
      return parts.filter((value) => ['A', 'B', 'C', 'D'].includes(value));
    }

    function cv7991BuildScanQuestionLabels(questions) {
      const labels = [];
      (Array.isArray(questions) ? questions : []).forEach((question, index) => {
        if (!question || question.format === 'essay' || question.format === 'short') return;
        const displayNo = String(index + 1);
        if (question.format === 'tf') {
          ['a', 'b', 'c', 'd'].forEach((sub) => labels.push(`${displayNo}${sub}`));
        } else {
          labels.push(displayNo);
        }
      });
      return labels;
    }

    /* Word thường chèn các đoạn rỗng quanh MathType, ảnh neo hoặc chỗ ngắt trang.
       Khi phóng lớn để trình chiếu, chỉ một đoạn rỗng cũng tạo ra một khoảng trắng
       rất cao. Loại riêng các dòng không có nội dung nhìn thấy, nhưng vẫn giữ một
       lần xuống dòng giữa mọi đoạn thực để không làm dính câu chữ. */
    function cv7991CompactPresenterWhitespace(value) {
      return String(value || '')
        .replace(/\r\n?/g, '\n')
        .split('\n')
        .filter((line) => {
          const visible = String(line || '')
            .replace(/\[\[CV7991_FMT_U_(?:START|END)\]\]/g, '')
            .replace(/\u00a0/g, ' ')
            .trim();
          return !!visible;
        })
        .join('\n');
    }

    function cv7991CleanPresenterText(value) {
      return cv7991CompactPresenterWhitespace(
        String(value || '').replace(/\s+\n/g, '\n')
      ).trim();
    }

    function cv7991EscapeTextAllowScriptTags(value) {
      // Word lưu chỉ số dưới/trên dạng định dạng chữ. Khi đọc file, K21 chuyển thành
      // <sub>...</sub> hoặc <sup>...</sup>. Nếu escape toàn bộ HTML thì trình chiếu
      // sẽ hiện nguyên chữ <sub>2</sub>. Chỉ mở lại 2 thẻ an toàn này, còn mọi HTML
      // khác vẫn bị escape để tránh làm hỏng giao diện.
      return escapeHtml(String(value || ''))
        .replace(/&lt;(\/?)(sub|sup)&gt;/gi, '<$1$2>')
        .replace(/\n/g, '<br>');
    }

    function cv7991PresenterImageDataUrl(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item) return '';
      if (item.presenterDataUrl) return String(item.presenterDataUrl || '');
      if (!item.data) return '';
      const mime = String(item.mimeType || '').trim() || 'image/png';
      try {
        let binary = '';
        const bytes = item.data;
        const chunk = 0x8000;
        for (let i = 0; i < bytes.length; i += chunk) {
          binary += String.fromCharCode.apply(null, Array.from(bytes.subarray(i, i + chunk)));
        }
        item.presenterDataUrl = `data:${mime};base64,${btoa(binary)}`;
      } catch (_) {
        item.presenterDataUrl = '';
      }
      return item.presenterDataUrl || '';
    }

    function cv7991CanBrowserDisplayPresenterImage(image) {
      if (String(image && image.presenterDataUrl || '').trim()) return true;
      const mime = String(image && image.mimeType || '').toLowerCase();
      const path = String(image && image.path || '').toLowerCase();
      if (/^image\/(png|jpe?g|gif|bmp|webp|svg\+xml)$/i.test(mime)) return true;
      return /\.(png|jpe?g|gif|bmp|webp|svg)$/i.test(path);
    }

    function cv7991PresenterImageKind(image) {
      const mime = String(image && image.mimeType || '').toLowerCase();
      const path = String(image && image.path || '').toLowerCase();
      if (/wmf/.test(mime) || /\.wmf$/i.test(path)) return 'wmf';
      if (/emf/.test(mime) || /\.emf$/i.test(path)) return 'emf';
      return '';
    }

    function cv7991ImageArrayBuffer(data) {
      if (data instanceof ArrayBuffer) return data;
      if (ArrayBuffer.isView(data)) {
        return data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
      }
      return data;
    }

    function cv7991SvgTextDataUrl(svgText) {
      const value = String(svgText || '');
      if (!value) return '';
      try {
        return `data:image/svg+xml;charset=utf-8,${encodeURIComponent(value)}`;
      } catch (_) {
        return '';
      }
    }

    function cv7991AsciiBytes(value) {
      return Array.from(String(value || '')).map((ch) => ch.charCodeAt(0) & 0xff);
    }

    function cv7991FindByteSequence(data, needle, fromIndex = 0) {
      const bytes = data instanceof Uint8Array ? data : new Uint8Array(cv7991ImageArrayBuffer(data));
      const target = Array.isArray(needle) ? needle : cv7991AsciiBytes(needle);
      if (!target.length || bytes.length < target.length) return -1;
      outer: for (let i = Math.max(0, fromIndex); i <= bytes.length - target.length; i += 1) {
        for (let j = 0; j < target.length; j += 1) {
          if (bytes[i + j] !== target[j]) continue outer;
        }
        return i;
      }
      return -1;
    }


    /*
     * MathType MTEF v5 reader for Word WMF/EMF preview objects.
     * Character mapping and record model are adapted from zhexiao/mtef-go
     * (Apache License 2.0). This reader only decodes equation data already
     * embedded in the user's DOCX; it does not contact an external service.
     */
    const CV7991_MTEF_CHARS = Object.freeze({"char/0x0020":" ","char/0x0021":"!","char/0x0022":"''","char/0x0023/mathmode":"\\@#","char/0x0024/mathmode":"\\$","char/0x0025/mathmode":"%","char/0x0026/mathmode":"\\And ","char/0x0027/mathmode":"'","char/0x0028":"(","char/0x0029":")","char/0x002a":"*","char/0x002b":"+","char/0x002c":",","char/0x002d":"-","char/0x002e":".","char/0x002f":"/","char/0x0030":"0","char/0x0031":"1","char/0x0032":"2","char/0x0033":"3","char/0x0034":"4","char/0x0035":"5","char/0x0036":"6","char/0x0037":"7","char/0x0038":"8","char/0x0039":"9","char/0x003a":":","char/0x003b":";","char/0x003c/mathmode":" < ","char/0x003d":"=","char/0x003e/mathmode":">","char/0x003f":"?","char/0x0041":"A","char/0x0042":"B","char/0x0043":"C","char/0x0044":"D","char/0x0045":"E","char/0x0046":"F","char/0x0047":"G","char/0x0048":"H","char/0x0049":"I","char/0x004a":"J","char/0x004b":"K","char/0x004c":"L","char/0x004d":"M","char/0x004e":"N","char/0x004f":"O","char/0x0050":"P","char/0x0051":"Q","char/0x0052":"R","char/0x0053":"S","char/0x0054":"T","char/0x0055":"U","char/0x0056":"V","char/0x0057":"W","char/0x0058":"X","char/0x0059":"Y","char/0x005a":"Z","char/0x005b/mathmode":"[","char/0x005c/mathmode":"\\backslash ","char/0x005d/mathmode":"]","char/0x005e/mathmode":"\\hat{\\ }","char/0x005f/mathmode":"\\_","char/0x0060/mathmode":"\\grave{\\ }","char/0x0061":"a","char/0x0062":"b","char/0x0063":"c","char/0x0064":"d","char/0x0065":"e","char/0x0066":"f","char/0x0067":"g","char/0x0068":"h","char/0x0069":"i","char/0x006a":"j","char/0x006b":"k","char/0x006c":"l","char/0x006d":"m","char/0x006e":"n","char/0x006f":"o","char/0x0070":"p","char/0x0071":"q","char/0x0072":"r","char/0x0073":"s","char/0x0074":"t","char/0x0075":"u","char/0x0076":"v","char/0x0077":"w","char/0x0078":"x","char/0x0079":"y","char/0x007a":"z","char/0x007b/mathmode":"\\{","char/0x007c/mathmode":"|","char/0x007d/mathmode":"\\}","char/0x007e/mathmode":"\\tilde{\\ 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","char/0x2295/mathmode":"\\oplus ","char/0x2296/mathmode":"\\ominus ","char/0x2297/mathmode":"\\otimes ","char/0x2298/mathmode":"\\oslash ","char/0x2299/mathmode":"\\odot ","char/0x229a/mathmode":"\\circledcirc ","char/0x229b/mathmode":"\\circledast ","char/0x229c/mathmode":"\\,\\bigcirc\\!\\!\\!\\!\\!\\!\\!=","char/0x229d/mathmode":"\\circleddash ","char/0x229e/mathmode":"\\boxplus ","char/0x229f/mathmode":"\\boxminus ","char/0x22a0/mathmode":"\\boxtimes ","char/0x22a1/mathmode":"\\boxdot ","char/0x22a2/mathmode":"\\vdash ","char/0x22a3/mathmode":"\\dashv ","char/0x22a4/mathmode":"\\top ","char/0x22a5/mathmode":"\\bot ","char/0x22a6/mathmode":"\\vdash ","char/0x22a7/mathmode":"\\models ","char/0x22a8/mathmode":"\\vDash ","char/0x22a9/mathmode":"\\Vdash ","char/0x22aa/mathmode":"\\Vvdash ","char/0x22ab/mathmode":"\\,\\|\\!\\!\\!=","char/0x22ac/mathmode":"\\nvdash ","char/0x22ad/mathmode":"\\nvDash ","char/0x22ae/mathmode":"\\nVdash ","char/0x22af/mathmode":"\\nVDash ","char/0x22b2/mathmode":"\\triangleleft ","char/0x22b3/mathmode":"\\triangleright ","char/0x22b4/mathmode":"\\trianglelefteq ","char/0x22b5/mathmode":"\\trianglerighteq ","char/0x22b8/mathmode":"\\multimap ","char/0x22ba/mathmode":"\\intercal ","char/0x22bb/mathmode":"\\veebar ","char/0x22bc/mathmode":"\\barwedge ","char/0x22bd/mathmode":"\\veebar ","char/0x22c0/mathmode":"\\bigwedge ","char/0x22c1/mathmode":"\\bigvee ","char/0x22c2/mathmode":"\\bigcap ","char/0x22c3/mathmode":"\\bigcup ","char/0x22c4/mathmode":"\\diamond ","char/0x22c5/mathmode":"\\cdot ","char/0x22c6/mathmode":"\\star ","char/0x22c7/mathmode":"\\divideontimes ","char/0x22c8/mathmode":"\\bowtie ","char/0x22c9/mathmode":"\\ltimes ","char/0x22ca/mathmode":"\\rtimes ","char/0x22cb/mathmode":"\\leftthreetimes ","char/0x22cc/mathmode":"\\rightthreetimes ","char/0x22ce/mathmode":"\\curlyvee ","char/0x22cf/mathmode":"\\curlywedge ","char/0x22d0/mathmode":"\\Subset ","char/0x22d1/mathmode":"\\Supset ","char/0x22d2/mathmode":"\\Cap ","char/0x22d3/mathmode":"\\Cup ","char/0x22d4/mathmode":"\\pitchfork ","char/0x22d6/mathmode":"\\lessdot ","char/0x22d7/mathmode":"\\gtrdot ","char/0x22d8/mathmode":"\\lll ","char/0x22d9/mathmode":"\\ggg ","char/0x22da/mathmode":"\\lesseqgtr ","char/0x22db/mathmode":"\\gtreqless ","char/0x22dc/mathmode":"\\eqslantless ","char/0x22dd/mathmode":"\\eqslantgtr ","char/0x22de/mathmode":"\\curlyeqprec ","char/0x22df/mathmode":"\\curlyeqsucc ","char/0x22e0/mathmode":"\\npreceq ","char/0x22e1/mathmode":"\\nsucceq ","char/0x22e6/mathmode":"\\lnsim ","char/0x22e7/mathmode":"\\gnsim ","char/0x22e8/mathmode":"\\precnsim ","char/0x22e9/mathmode":"\\succnsim ","char/0x22ea/mathmode":"\\ntriangleleft ","char/0x22eb/mathmode":"\\ntriangleright ","char/0x22ec/mathmode":"\\ntrianglelefteq ","char/0x22ed/mathmode":"\\ntrianglerighteq ","char/0x22ee/mathmode":"\\vdots ","char/0x22ef/mathmode":"\\cdots ","char/0x22f1/mathmode":"\\ddots ","char/0x2300/mathmode":"\\varnothing ","char/0x2306/mathmode":"\\doublebarwedge ","char/0x2308/mathmode":"\\lceil ","char/0x2309/mathmode":"\\rceil ","char/0x230a/mathmode":"\\lfloor ","char/0x230b/mathmode":"\\rfloor ","char/0x231c/mathmode":"\\ulcorner ","char/0x231d/mathmode":"\\urcorner ","char/0x231e/mathmode":"\\llcorner ","char/0x231f/mathmode":"\\lrcorner ","char/0x2322/mathmode":"\\frown ","char/0x2323/mathmode":"\\smile ","char/0x2329/mathmode":"\\langle ","char/0x232a/mathmode":"\\rangle ","char/0x2329":"\\langle ","char/0x232a":"\\rangle ","char/0x2353/mathmode":"\\Box\\!\\!\\!\\!\\wedge","char/0x2370/mathmode":"\\Box\\!\\!\\!\\!?","char/0x2423/mathmode":"\\textvisiblespace ","char/0x24c8/mathmode":"\\circledS ","char/0x25a0/mathmode":"\\blacksquare ","char/0x25a1/mathmode":"\\square ","char/0x25b2/mathmode":"\\blacktriangle ","char/0x25b3/mathmode":"\\vartriangle ","char/0x25b6/mathmode":"\\blacktriangleright ","char/0x25bc/mathmode":"\\blacktriangledown ","char/0x25bd/mathmode":"\\triangledown ","char/0x25c0/mathmode":"\\blacktriangleleft ","char/0x25ca/mathmode":"\\lozenge ","char/0x25cb/mathmode":"\\bigcirc ","char/0x2605/mathmode":"\\bigstar ","char/0x2660/mathmode":"\\spadesuit ","char/0x2661/mathmode":"\\heartsuit ","char/0x2662/mathmode":"\\diamondsuit ","char/0x2663/mathmode":"\\clubsuit ","char/0x2666/mathmode":"\\blacklozenge ","char/0x266d/mathmode":"\\flat ","char/0x266e/mathmode":"\\natural ","char/0x266f/mathmode":"\\sharp ","char/0x2713/mathmode":"\\checkmark ","char/0x2715/mathmode":"\\times ","char/0x27e6/mathmode":"[\\![","char/0x27e7/mathmode":"]\\!]","char/0x27e8/mathmode":"\\langle ","char/0x27e9/mathmode":"\\rangle ","char/0x27f5/mathmode":"\\longleftarrow ","char/0x27f6/mathmode":"\\longrightarrow ","char/0x27f7/mathmode":"\\longleftrightarrow ","char/0x27f8/mathmode":"\\Longleftarrow ","char/0x27f9/mathmode":"\\Longrightarrow ","char/0x27fa/mathmode":"\\Longleftrightarrow ","char/0x27fc/mathmode":"\\longmapsto ","char/0x29eb/mathmode":"\\blacklozenge ","char/0x29f8/mathmode":"\\Big /","char/0x29f9/mathmode":"\\Big\\backslash ","char/0x2a00/mathmode":"\\bigodot ","char/0x2a01/mathmode":"\\bigoplus ","char/0x2a02/mathmode":"\\bigotimes ","char/0x2a04/mathmode":"\\biguplus ","char/0x2a06/mathmode":"\\bigsqcup ","char/0x2a0c/mathmode":"\\iiiint ","char/0x3008/mathmode":"\\langle ","char/0x3009/mathmode":"\\rangle ","char/0x301a/mathmode":"[\\![","char/0x301b/mathmode":"]\\!]","char/0xe90b/mathmode":"\\supseteqq ","char/0xe90c/mathmode":"\\subseteqq ","char/0xe922/mathmode":"\\lesseqqgtr ","char/0xe92d/mathmode":"\\gtreqqless ","char/0xe92e/mathmode":"\\shortmid ","char/0xe92f/mathmode":"\\shortparallel ","char/0xe930/mathmode":"\\leqslant ","char/0xe931/mathmode":"\\geqslant ","char/0xe932/mathmode":"\\lessapprox ","char/0xe933/mathmode":"\\gtrapprox ","char/0xe938/mathmode":"\\preceq ","char/0xe939/mathmode":"\\succeq ","char/0xe93a/mathmode":"\\precapprox ","char/0xe93b/mathmode":"\\succapprox ","char/0xe981/mathmode":"\\circleddash ","char/0xe98f/mathmode":"\\centerdot ","char/0xea06/mathmode":"\\nleq ","char/0xea07/mathmode":"\\ngeq ","char/0xea0b/mathmode":"\\nsupseteqq ","char/0xea0c/mathmode":"\\nsubseteqq ","char/0xea0e/mathmode":"\\not\\eqslantgtr ","char/0xea0f/mathmode":"\\not\\eqsim ","char/0xea10/mathmode":"\\not\\eqslantless ","char/0xea11/mathmode":"\\nsim ","char/0xea2e/mathmode":"\\nshortmid ","char/0xea2f/mathmode":"\\nshortparallel ","char/0xea32/mathmode":"\\lnapprox ","char/0xea33/mathmode":"\\gnapprox ","char/0xea34/mathmode":"\\lneq ","char/0xea35/mathmode":"\\gneq ","char/0xea38/mathmode":"\\npreceq ","char/0xea39/mathmode":"\\nsucceq ","char/0xea3a/mathmode":"\\precnapprox ","char/0xea3b/mathmode":"\\succnapprox ","char/0xea40/mathmode":"\\precneqq ","char/0xea41/mathmode":"\\succneqq ","char/0xea42/mathmode":"\\varsubsetneq ","char/0xea43/mathmode":"\\varsupsetneq ","char/0xea44/mathmode":"\\subsetneqq ","char/0xea45/mathmode":"\\supsetneqq ","char/0xea46/mathmode":"\\varsubsetneqq ","char/0xea47/mathmode":"\\varsupsetneqq ","char/0xeb01/mathmode":"\\overrightarrow{\\scriptscriptstyle\\leftarrow}","char/0xeb02/mathmode":"\\stackrel{\\scriptscriptstyle\\to}{\\leftarrow}","char/0xed01/mathmode":"\\Game ","char/0xed02/mathmode":"\\jmath ","char/0xed10":" d ","char/0xed11":" e ","char/0xed12":" i ","char/0xed13":" j ","char/0xed16":" D ","char/0xef00/mathmode":" & ","char/0xef01":"","char/0x200b":"","char/0xef02/mathmode":"\\,","char/0x2009/mathmode":"\\,","char/0xef03/mathmode":"\\;","char/0x205f/mathmode":"\\;","char/0xef04/mathmode":"\\ ","char/0x2004/mathmode":"\\ ","char/0xef05/mathmode":"\\quad ","char/0x2003/mathmode":"\\quad ","char/0xef06/mathmode":"\\qquad ","char/0xef22/mathmode":"\\!","char/0xf000/mathmode":"\\mathfrak{A}","char/0xf001/mathmode":"\\mathfrak{B}","char/0xf002/mathmode":"\\mathfrak{C}","char/0xf003/mathmode":"\\mathfrak{D}","char/0xf004/mathmode":"\\mathfrak{E}","char/0xf005/mathmode":"\\mathfrak{F}","char/0xf006/mathmode":"\\mathfrak{G}","char/0xf007/mathmode":"\\mathfrak{H}","char/0xf008/mathmode":"\\mathfrak{I}","char/0xf009/mathmode":"\\mathfrak{J}","char/0xf00a/mathmode":"\\mathfrak{K}","char/0xf00b/mathmode":"\\mathfrak{L}","char/0xf00c/mathmode":"\\mathfrak{M}","char/0xf00d/mathmode":"\\mathfrak{N}","char/0xf00e/mathmode":"\\mathfrak{O}","char/0xf00f/mathmode":"\\mathfrak{P}","char/0xf010/mathmode":"\\mathfrak{Q}","char/0xf011/mathmode":"\\mathfrak{R}","char/0xf012/mathmode":"\\mathfrak{S}","char/0xf013/mathmode":"\\mathfrak{T}","char/0xf014/mathmode":"\\mathfrak{U}","char/0xf015/mathmode":"\\mathfrak{V}","char/0xf016/mathmode":"\\mathfrak{W}","char/0xf017/mathmode":"\\mathfrak{X}","char/0xf018/mathmode":"\\mathfrak{Y}","char/0xf019/mathmode":"\\mathfrak{Z}","char/0xf01a/mathmode":"\\mathfrak{a}","char/0xf01b/mathmode":"\\mathfrak{b}","char/0xf01c/mathmode":"\\mathfrak{c}","char/0xf01d/mathmode":"\\mathfrak{d}","char/0xf01e/mathmode":"\\mathfrak{e}","char/0xf01f/mathmode":"\\mathfrak{f}","char/0xf020/mathmode":"\\mathfrak{g}","char/0xf021/mathmode":"\\mathfrak{h}","char/0xf022/mathmode":"\\mathfrak{i}","char/0xf023/mathmode":"\\mathfrak{j}","char/0xf024/mathmode":"\\mathfrak{k}","char/0xf025/mathmode":"\\mathfrak{l}","char/0xf026/mathmode":"\\mathfrak{m}","char/0xf027/mathmode":"\\mathfrak{n}","char/0xf028/mathmode":"\\mathfrak{o}","char/0xf029/mathmode":"\\mathfrak{p}","char/0xf02a/mathmode":"\\mathfrak{q}","char/0xf02b/mathmode":"\\mathfrak{r}","char/0xf02c/mathmode":"\\mathfrak{s}","char/0xf02d/mathmode":"\\mathfrak{t}","char/0xf02e/mathmode":"\\mathfrak{u}","char/0xf02f/mathmode":"\\mathfrak{v}","char/0xf030/mathmode":"\\mathfrak{w}","char/0xf031/mathmode":"\\mathfrak{x}","char/0xf032/mathmode":"\\mathfrak{y}","char/0xf033/mathmode":"\\mathfrak{z}","char/0xf080/mathmode":"\\mathbb{A}","char/0xf081/mathmode":"\\mathbb{B}","char/0xf082/mathmode":"\\mathbb{C}","char/0xf083/mathmode":"\\mathbb{D}","char/0xf084/mathmode":"\\mathbb{E}","char/0xf085/mathmode":"\\mathbb{F}","char/0xf086/mathmode":"\\mathbb{G}","char/0xf087/mathmode":"\\mathbb{H}","char/0xf088/mathmode":"\\mathbb{I}","char/0xf089/mathmode":"\\mathbb{J}","char/0xf08a/mathmode":"\\mathbb{K}","char/0xf08b/mathmode":"\\mathbb{L}","char/0xf08c/mathmode":"\\mathbb{M}","char/0xf08d/mathmode":"\\mathbb{N}","char/0xf08e/mathmode":"\\mathbb{O}","char/0xf08f/mathmode":"\\mathbb{P}","char/0xf090/mathmode":"\\mathbb{Q}","char/0xf091/mathmode":"\\mathbb{R}","char/0xf092/mathmode":"\\mathbb{S}","char/0xf093/mathmode":"\\mathbb{T}","char/0xf094/mathmode":"\\mathbb{U}","char/0xf095/mathmode":"\\mathbb{V}","char/0xf096/mathmode":"\\mathbb{W}","char/0xf097/mathmode":"\\mathbb{X}","char/0xf098/mathmode":"\\mathbb{Y}","char/0xf099/mathmode":"\\mathbb{Z}","char/0xf0a4/mathmode":"\\Bbbk ","char/0xf100/mathmode":"\\mathcal{A}","char/0xf101/mathmode":"\\mathcal{B}","char/0xf102/mathmode":"\\mathcal{C}","char/0xf103/mathmode":"\\mathcal{D}","char/0xf104/mathmode":"\\mathcal{E}","char/0xf105/mathmode":"\\mathcal{F}","char/0xf106/mathmode":"\\mathcal{G}","char/0xf107/mathmode":"\\mathcal{H}","char/0xf108/mathmode":"\\mathcal{I}","char/0xf109/mathmode":"\\mathcal{J}","char/0xf10a/mathmode":"\\mathcal{K}","char/0xf10b/mathmode":"\\mathcal{L}","char/0xf10c/mathmode":"\\mathcal{M}","char/0xf10d/mathmode":"\\mathcal{N}","char/0xf10e/mathmode":"\\mathcal{O}","char/0xf10f/mathmode":"\\mathcal{P}","char/0xf110/mathmode":"\\mathcal{Q}","char/0xf111/mathmode":"\\mathcal{R}","char/0xf112/mathmode":"\\mathcal{S}","char/0xf113/mathmode":"\\mathcal{T}","char/0xf114/mathmode":"\\mathcal{U}","char/0xf115/mathmode":"\\mathcal{V}","char/0xf116/mathmode":"\\mathcal{W}","char/0xf117/mathmode":"\\mathcal{X}","char/0xf118/mathmode":"\\mathcal{Y}","char/0xf119/mathmode":"\\mathcal{Z}","char/0xec07":"|","char/0xec08":"|","char/0x003c":" < ","char/0x0302":"\\widehat ","char/0x86e0":"\\prime "});
    const CV7991_MTEF_SPECIAL_CHARS = Object.freeze({
      '!': '\\!', '#': '\\#', '$': '\\$', '%': '\\%', '&': '\\&',
      ':': '\\:', ';': '\\;', '_': '\\_', '{': '\\{', '|': '\\|', '}': '\\}'
    });

    function cv7991MtefBytes(value) {
      if (value instanceof Uint8Array) return value;
      const buffer = cv7991ImageArrayBuffer(value);
      return buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer || 0);
    }

    function cv7991MtefReader(bytes, start = 0) {
      const data = cv7991MtefBytes(bytes);
      let position = Math.max(0, Number(start) || 0);
      const requireBytes = (count) => {
        if (position + count > data.length) throw new Error('Dữ liệu MathType bị thiếu.');
      };
      return {
        get position() { return position; },
        get length() { return data.length; },
        u8() { requireBytes(1); return data[position++]; },
        i8() { const value = this.u8(); return value >= 128 ? value - 256 : value; },
        u16() {
          requireBytes(2);
          const value = data[position] | (data[position + 1] << 8);
          position += 2;
          return value;
        },
        i16() { const value = this.u16(); return value >= 0x8000 ? value - 0x10000 : value; },
        skip(count) { const n = Math.max(0, Number(count) || 0); requireBytes(n); position += n; },
        zeroString(maxLength = 2048) {
          const begin = position;
          const limit = Math.min(data.length, begin + Math.max(1, Number(maxLength) || 2048));
          while (position < limit && data[position] !== 0) position += 1;
          if (position >= data.length || data[position] !== 0) throw new Error('Chuỗi MathType không có ký tự kết thúc.');
          let result = '';
          for (let i = begin; i < position; i += 1) result += String.fromCharCode(data[i]);
          position += 1;
          return result;
        },
      };
    }

    function cv7991MtefFindStarts(input) {
      const bytes = cv7991MtefBytes(input);
      const starts = [];
      const begin = Math.max(0, bytes.length - 1000000);
      for (let i = begin; i + 12 < bytes.length; i += 1) {
        if (bytes[i] !== 5 || bytes[i + 1] > 3) continue;
        let zeroAt = -1;
        const upper = Math.min(bytes.length, i + 64);
        for (let j = i + 5; j < upper; j += 1) {
          if (bytes[j] === 0) { zeroAt = j; break; }
        }
        if (zeroAt < 0 || zeroAt <= i + 5) continue;
        let application = '';
        for (let j = i + 5; j < zeroAt; j += 1) application += String.fromCharCode(bytes[j]);
        if (!/(?:DSMT|MathType|Equation)/i.test(application)) continue;
        starts.push({ start: i, application });
      }
      return starts;
    }

    function cv7991MtefReadNudge(reader) {
      const x = reader.i8();
      const y = reader.i8();
      if (x === -128 || y === -128) return { x: reader.i16(), y: reader.i16() };
      return { x, y };
    }

    function cv7991MtefReadDimensionArray(reader, requestedCount) {
      const count = Math.max(0, Number(requestedCount) || 0);
      const result = [];
      let readingUnit = true;
      let current = '';
      const units = ['in', 'cm', 'pt', 'pc', '%'];
      while (result.length < count) {
        const packed = reader.u8();
        const nibbles = [(packed >>> 4) & 0x0f, packed & 0x0f];
        for (const nibble of nibbles) {
          if (readingUnit) {
            current += units[nibble] || '';
            readingUnit = false;
          } else if (nibble <= 9) {
            current += String(nibble);
          } else if (nibble === 0x0a) {
            current += '.';
          } else if (nibble === 0x0b) {
            current += '-';
          } else if (nibble === 0x0f) {
            result.push(current);
            current = '';
            readingUnit = true;
            if (result.length >= count) break;
          }
        }
      }
      return result;
    }

    function cv7991MtefNode(tag, value = null) {
      return { tag, value, children: [] };
    }

    function cv7991MtefParseAt(input, start) {
      const bytes = cv7991MtefBytes(input);
      const reader = cv7991MtefReader(bytes, start);
      const header = {
        version: reader.u8(),
        platform: reader.u8(),
        product: reader.u8(),
        productVersion: reader.u8(),
        productSubversion: reader.u8(),
        application: reader.zeroString(64),
        equationOptions: reader.u8(),
      };
      if (header.version !== 5) throw new Error(`Phiên bản MTEF ${header.version} chưa được hỗ trợ.`);

      const root = cv7991MtefNode(255, header);
      const stack = [root];
      let mainStarted = false;
      let completed = false;
      let recordCount = 0;
      let charCount = 0;
      /* CHAR có cờ MtefOptCharEmbell (0x01) được theo sau bởi một hay nhiều
         EMBELL rồi một END riêng. END đó chỉ kết thúc danh sách trang trí của
         CHAR, không phải kết thúc LINE. Nếu coi nó là END của LINE, công thức
         polymer kiểu (-CH2-CH2-) bị cắt ngay sau dấu ngoặc đầu. */
      let charEmbellishmentDepth = 0;

      const append = (node) => {
        const parent = stack[stack.length - 1] || root;
        parent.children.push(node);
      };

      while (reader.position < reader.length && recordCount < 50000) {
        recordCount += 1;
        const record = reader.u8();
        if (record >= 100) {
          const skipLength = reader.u8();
          reader.skip(skipLength);
          continue;
        }

        if (record === 0) { // END
          if (charEmbellishmentDepth > 0) {
            charEmbellishmentDepth -= 1;
            continue;
          }
          if (stack.length > 1) {
            stack.pop();
            if (mainStarted && stack.length === 1) {
              completed = true;
              break;
            }
          }
          continue;
        }

        if (record === 1) { // LINE
          const options = reader.u8();
          const value = { options, nullLine: !!(options & 0x01) };
          if (options & 0x08) value.nudge = cv7991MtefReadNudge(reader);
          if (options & 0x04) value.lineSpace = reader.u8();
          if (options & 0x02) {
            const stopCount = reader.u8();
            value.tabStops = [];
            for (let i = 0; i < stopCount; i += 1) value.tabStops.push({ type: reader.u8(), offset: reader.u16() });
          }
          const node = cv7991MtefNode(1, value);
          append(node);
          if (!value.nullLine) {
            stack.push(node);
            if (stack.length === 2) mainStarted = true;
          }
          continue;
        }

        if (record === 2) { // CHAR
          const options = reader.u8();
          const value = { options };
          if (options & 0x08) value.nudge = cv7991MtefReadNudge(reader);
          value.typeface = reader.u8();
          value.mtcode = (options & 0x20) ? 0 : reader.u16();
          if (options & 0x04) value.char8 = reader.u8();
          if (options & 0x10) value.char16 = reader.u16();
          const node = cv7991MtefNode(2, value);
          node.embellishments = [];
          append(node);
          charCount += 1;
          if (options & 0x01) charEmbellishmentDepth += 1;
          continue;
        }

        if (record === 3) { // TMPL
          const recordOptions = reader.u8();
          const value = { recordOptions };
          if (recordOptions & 0x08) value.nudge = cv7991MtefReadNudge(reader);
          value.selector = reader.u8();
          const firstVariation = reader.u8();
          value.variation = (firstVariation & 0x80)
            ? ((firstVariation & 0x7f) | (reader.u8() << 8))
            : firstVariation;
          value.options = reader.u8();
          const node = cv7991MtefNode(3, value);
          append(node);
          stack.push(node);
          if (stack.length === 2) mainStarted = true;
          continue;
        }

        if (record === 4) { // PILE
          const options = reader.u8();
          const value = { options };
          if (options & 0x08) value.nudge = cv7991MtefReadNudge(reader);
          value.horizontalAlign = reader.u8();
          value.verticalAlign = reader.u8();
          const node = cv7991MtefNode(4, value);
          append(node);
          stack.push(node);
          if (stack.length === 2) mainStarted = true;
          continue;
        }

        if (record === 5) { // MATRIX
          const options = reader.u8();
          const value = { options };
          if (options & 0x08) value.nudge = cv7991MtefReadNudge(reader);
          value.verticalAlign = reader.u8();
          value.horizontalJustification = reader.u8();
          value.verticalJustification = reader.u8();
          value.rows = reader.u8();
          value.columns = reader.u8();

          /* Sau số hàng và số cột, MTEF còn lưu danh sách đường phân cách hàng/cột.
             Mỗi đường dùng 2 bit; số đường có thể có bằng số hàng/cột cộng 1 và
             toàn bộ danh sách được làm tròn lên theo byte. Bản trước bỏ qua phần này,
             nên hai byte 00 của ma trận 1 x 1 bị hiểu nhầm là hai bản ghi END và
             hệ 3 phương trình phía trong bị cắt mất hoàn toàn. */
          const rowPartitionBytes = Math.ceil(((Math.max(0, value.rows) + 1) * 2) / 8);
          const columnPartitionBytes = Math.ceil(((Math.max(0, value.columns) + 1) * 2) / 8);
          value.rowPartitions = [];
          value.columnPartitions = [];
          for (let i = 0; i < rowPartitionBytes; i += 1) value.rowPartitions.push(reader.u8());
          for (let i = 0; i < columnPartitionBytes; i += 1) value.columnPartitions.push(reader.u8());

          const node = cv7991MtefNode(5, value);
          append(node);
          stack.push(node);
          if (stack.length === 2) mainStarted = true;
          continue;
        }

        if (record === 6) { // EMBELL
          const options = reader.u8();
          if (options & 0x08) cv7991MtefReadNudge(reader);
          const embellishment = reader.u8();
          const parent = stack[stack.length - 1] || root;
          const previous = parent.children[parent.children.length - 1];
          if (previous && previous.tag === 2) previous.embellishments.push(embellishment);
          else append(cv7991MtefNode(6, { options, embellishment }));
          continue;
        }

        if (record === 7) { // RULER
          const stopCount = reader.u8();
          for (let i = 0; i < stopCount; i += 1) { reader.u8(); reader.u16(); }
          continue;
        }

        if (record === 8) { reader.u8(); reader.u8(); continue; } // FONT_STYLE_DEF: font_def_index + char_style
        if (record === 9) { // SIZE
          const sizeType = reader.u8();
          /* MathType 7 (DSMT7) dùng mã 0x65 cho kích thước tùy chỉnh và theo
             sau bằng giá trị 16-bit. Bản cũ chỉ đọc một byte của giá trị này,
             nên byte cao bị hiểu nhầm là bản ghi LINE và toàn bộ CHAR phía sau
             bị lệch; kết quả chỉ còn các gạch phân số/đường kẻ của ảnh WMF. */
          if (sizeType === 0x65) reader.u16();
          else reader.u8();
          continue;
        }
        if (record >= 10 && record <= 14) continue; // FULL/SUB/SUB2/SYM/SUBSYM
        if (record === 15) { reader.u8(); continue; } // COLOR
        if (record === 16) { // COLOR_DEF
          const options = reader.u8();
          const values = (options & 0x01) ? 4 : 3;
          for (let i = 0; i < values; i += 1) reader.u16();
          if (options & 0x04) reader.zeroString();
          continue;
        }
        if (record === 17) { reader.u8(); reader.zeroString(); continue; } // FONT_DEF
        if (record === 18) { // EQN_PREFS
          reader.u8();
          cv7991MtefReadDimensionArray(reader, reader.u8());
          cv7991MtefReadDimensionArray(reader, reader.u8());
          const styleCount = reader.u8();
          for (let i = 0; i < styleCount; i += 1) {
            const style = reader.u8();
            if (style !== 0) reader.u8();
          }
          continue;
        }
        if (record === 19) { reader.zeroString(); continue; } // ENCODING_DEF

        // Unknown bytes here normally mean the MTEF comment has ended and the
        // surrounding WMF/EMF stream resumes. A complete root line is enough.
        break;
      }

      if (!completed || !root.children.length || charCount < 1) {
        throw new Error('Không tìm thấy nội dung công thức MTEF hoàn chỉnh.');
      }
      return { root, header, end: reader.position, recordCount, charCount };
    }

    function cv7991MtefEscapeCharacter(character) {
      return CV7991_MTEF_SPECIAL_CHARS[character] || character;
    }

    function cv7991MtefCharacterTex(value) {
      const mtcode = Number(value && value.mtcode) || 0;
      const typeface = (Number(value && value.typeface) || 0) - 128;
      if (typeface === 2 && mtcode === 0x005c) return '\\setminus ';

      const baseKey = `char/0x${mtcode.toString(16).padStart(4, '0')}`;
      const preferredKey = `${baseKey}${(typeface === 11 || typeface === 24) ? '/mathmode' : ''}`;
      const mathKey = `${baseKey}/mathmode`;
      let tex = '';
      let found = false;
      if (Object.prototype.hasOwnProperty.call(CV7991_MTEF_CHARS, preferredKey)) {
        tex = CV7991_MTEF_CHARS[preferredKey];
        found = true;
      } else if (Object.prototype.hasOwnProperty.call(CV7991_MTEF_CHARS, mathKey)) {
        tex = CV7991_MTEF_CHARS[mathKey];
        found = true;
      } else if (Object.prototype.hasOwnProperty.call(CV7991_MTEF_CHARS, baseKey)) {
        tex = CV7991_MTEF_CHARS[baseKey];
        found = true;
      }
      if (!found) {
        try { tex = String.fromCodePoint(mtcode); } catch (_) { tex = ''; }
        tex = Array.from(tex).map(cv7991MtefEscapeCharacter).join('');
      }
      if (typeface === 1 && tex) tex = `\\mathrm{${tex}}`;
      if (typeface === 2 && /^[A-Za-z]$/.test(tex)) tex = `\\mathrm{${tex}}`;
      return tex;
    }

    function cv7991MathTypeSimpleVectorBase(tex) {
      const compact = String(tex || '').replace(/\s+/g, '');
      if (/^[A-Za-zΑ-Ωα-ω]$/.test(compact)) return true;
      return /^\\(?:alpha|beta|gamma|delta|epsilon|varepsilon|zeta|eta|theta|vartheta|iota|kappa|lambda|mu|nu|xi|pi|rho|sigma|tau|phi|varphi|chi|psi|omega)$/i.test(compact);
    }

    function cv7991MathTypeVectorAccentTex(tex) {
      const base = String(tex || '').trim();
      return cv7991MathTypeSimpleVectorBase(base)
        ? `\\vec{${base}}`
        : `\\overrightarrow{${base}}`;
    }

    function cv7991NormalizeMathTypeAccentTex(value) {
      let tex = String(value || '');
      /* MathType xuất \overrightarrow cho cả một biến đơn. MathJax hiểu đây là
         mũi tên co giãn nên dấu dễ dài hơn bản Word; \vec giữ đúng mũi tên ngắn
         và căn giữa trên a, b, i, j, k, u... */
      tex = tex.replace(/\\overrightarrow\s*\{\s*([A-Za-zΑ-Ωα-ω])\s*\}/g, '\\vec{$1}');
      tex = tex.replace(/\\overrightarrow\s*\{\s*(\\(?:alpha|beta|gamma|delta|epsilon|varepsilon|zeta|eta|theta|vartheta|iota|kappa|lambda|mu|nu|xi|pi|rho|sigma|tau|phi|varphi|chi|psi|omega))\s*\}/gi, '\\vec{$1}');
      tex = tex.replace(/\\overrightarrow\s+([A-Za-zΑ-Ωα-ω])(?![A-Za-zΑ-Ωα-ω])/g, '\\vec{$1}');
      /* \frown là một glyph có bề rộng cố định. \overparen của mathtools là
         accent co giãn nên phủ đúng toàn bộ ABC và vẫn giữ hình cung cong. */
      tex = tex.replace(/\\overset\s*\{\s*\\frown\s*\}\s*\{((?:[^{}]|\{[^{}]*\})+)\}/g, '\\overparen{$1}');
      return tex;
    }

    function cv7991MtefApplyEmbellishments(tex, embellishments) {
      let result = String(tex || '');
      (Array.isArray(embellishments) ? embellishments : []).forEach((type) => {
        if (type === 2) result = `\\dot{${result}}`;
        else if (type === 3) result = `\\ddot{${result}}`;
        else if (type === 4) result = `\\dddot{${result}}`;
        else if (type === 5) result += "'";
        else if (type === 6) result += "''";
        else if (type === 18) result += "'''";
        else if (type === 8) result = `\\widetilde{${result}}`;
        else if (type === 9) result = `\\widehat{${result}}`;
        else if (type === 10) result = `\\not{${result}}`;
        else if (type === 11) result = cv7991MathTypeVectorAccentTex(result);
        else if (type === 12) result = `\\overleftarrow{${result}}`;
        else if (type === 13) result = `\\overleftrightarrow{${result}}`;
        else if (type === 14) result = `\\overrightharpoon{${result}}`;
        else if (type === 15) result = `\\overleftharpoon{${result}}`;
        else if (type === 16) {
          /* embMBAR = middle bar. MathType dùng nó trên "(" và ")" để vẽ
             liên kết polymer xuyên qua ngoặc: -( ... )-. Không được đổi thành
             overline vì sẽ tạo vệt đen/đốm ở hai đầu như bản v5. */
          const compact = result.replace(/\s+/g, '');
          if (compact === '(') result = '-(';
          else if (compact === ')') result = ')-';
          else result = `\\mathord{-}${result}`;
        }
        else if (type === 17) result = `\\overline{${result}}`;
        else if (type === 19) result = `\\overparen{${result}}`;
        else if (type === 20) result = `\\overset{\\smile}{${result}}`;
        else if (type === 24) result = `\\ddddot{${result}}`;
        else if (type === 25) result = `\\underset{\\cdot}{${result}}`;
        else if (type === 26) result = `\\underset{\\cdot\\!\\cdot}{${result}}`;
        else if (type === 29) result = `\\underline{${result}}`;
        else if (type === 30) result = `\\underset{\\sim}{${result}}`;
        else if (type === 33) result = `\\underrightarrow{${result}}`;
        else if (type === 34) result = `\\underleftarrow{${result}}`;
      });
      return result;
    }

    function cv7991MtefFunctionTex(name) {
      const value = String(name || '');
      if (!value) return '';
      const lower = value.toLowerCase();
      const builtIn = new Set([
        'sin', 'cos', 'tan', 'cot', 'sec', 'csc',
        'sinh', 'cosh', 'tanh', 'coth',
        'arcsin', 'arccos', 'arctan', 'arccot',
        'log', 'ln', 'lg', 'lim', 'limsup', 'liminf',
        'max', 'min', 'sup', 'inf', 'exp', 'det', 'gcd', 'mod',
      ]);
      return builtIn.has(lower) ? `\\${lower} ` : `\\operatorname{${value}}`;
    }

    function cv7991MtefChildrenTex(node) {
      const children = node && Array.isArray(node.children) ? node.children : [];
      const output = [];
      for (let index = 0; index < children.length; index += 1) {
        const child = children[index];
        const typeface = child && child.tag === 2
          ? (Number(child.value && child.value.typeface) || 0) - 128
          : 0;
        const mtcode = child && child.tag === 2 ? Number(child.value && child.value.mtcode) || 0 : 0;
        const character = mtcode ? String.fromCodePoint(mtcode) : '';
        if (typeface === 2 && /^[A-Za-z]$/.test(character)) {
          let name = character;
          let cursor = index + 1;
          while (cursor < children.length) {
            const next = children[cursor];
            const nextTypeface = next && next.tag === 2
              ? (Number(next.value && next.value.typeface) || 0) - 128
              : 0;
            const nextMtcode = next && next.tag === 2 ? Number(next.value && next.value.mtcode) || 0 : 0;
            const nextCharacter = nextMtcode ? String.fromCodePoint(nextMtcode) : '';
            if (nextTypeface !== 2 || !/^[A-Za-z]$/.test(nextCharacter)) break;
            name += nextCharacter;
            cursor += 1;
          }
          output.push(cv7991MtefFunctionTex(name));
          index = cursor - 1;
          continue;
        }
        output.push(cv7991MtefToTex(child));
      }
      return output;
    }

    /* Nhãn trên/dưới mũi tên của MathType cũ có thể dùng font .VnTime
       (bảng mã TCVN3). MTEF chỉ lưu byte gốc nên nếu hiểu như Latin-1 sẽ hiện
       “®iÖn ph©n”, “cã mµng ng¨n”. Bảng dưới chuyển đúng từng byte sang Unicode. */
    const CV7991_TCVN3_BYTE_TO_UNICODE = Object.freeze({"128":"À","129":"Ả","130":"Ã","131":"Á","132":"Ạ","133":"Ặ","134":"Ậ","135":"È","136":"Ẻ","137":"Ẽ","138":"É","139":"Ẹ","140":"Ệ","141":"Ì","142":"Ỉ","143":"Ĩ","144":"Í","145":"Ị","146":"Ò","147":"Ỏ","148":"Õ","149":"Ó","150":"Ọ","151":"Ộ","152":"Ờ","153":"Ở","154":"Ỡ","155":"Ớ","156":"Ợ","157":"Ù","158":"Ủ","159":"Ũ","160":" ","161":"Ă","162":"Â","163":"Ê","164":"Ô","165":"Ơ","166":"Ư","167":"Đ","168":"ă","169":"â","170":"ê","171":"ô","172":"ơ","173":"ư","174":"đ","175":"Ằ","176":"̀","177":"̉","178":"̃","179":"́","180":"̣","181":"à","182":"ả","183":"ã","184":"á","185":"ạ","186":"Ẳ","187":"ằ","188":"ẳ","189":"ẵ","190":"ắ","191":"Ẵ","192":"Ắ","193":"Ầ","194":"Ẩ","195":"Ẫ","196":"Ấ","197":"Ề","198":"ặ","199":"ầ","200":"ẩ","201":"ẫ","202":"ấ","203":"ậ","204":"è","205":"Ể","206":"ẻ","207":"ẽ","208":"é","209":"ẹ","210":"ề","211":"ể","212":"ễ","213":"ế","214":"ệ","215":"ì","216":"ỉ","217":"Ễ","218":"Ế","219":"Ồ","220":"ĩ","221":"í","222":"ị","223":"ò","224":"Ổ","225":"ỏ","226":"õ","227":"ó","228":"ọ","229":"ồ","230":"ổ","231":"ỗ","232":"ố","233":"ộ","234":"ờ","235":"ở","236":"ỡ","237":"ớ","238":"ợ","239":"ù","240":"Ỗ","241":"ủ","242":"ũ","243":"ú","244":"ụ","245":"ừ","246":"ử","247":"ữ","248":"ứ","249":"ự","250":"ỳ","251":"ỷ","252":"ỹ","253":"ý","254":"ỵ","255":"Ố"});

    function cv7991MtefEscapeTextContent(value) {
      return String(value == null ? '' : value)
        .replace(/\\/g, '\\textbackslash{}')
        .replace(/([{}%$#&_])/g, '\\$1')
        .replace(/\^/g, '\\^{}')
        .replace(/~/g, '\\~{}');
    }

    function cv7991MtefLegacyVietnameseText(node) {
      const bytes = [];
      let valid = true;
      let hasLegacyByte = false;

      const visit = (current) => {
        if (!current || !valid) return;
        if (current.tag === 255 || current.tag === 1) {
          (Array.isArray(current.children) ? current.children : []).forEach(visit);
          return;
        }
        if (current.tag !== 2) { valid = false; return; }

        const value = current.value || {};
        const typeface = (Number(value.typeface) || 0) - 128;
        const mtcode = Number(value.mtcode) || 0;
        // Các mã khoảng cách MathType nằm ngoài bảng mã 8-bit.
        if ([0xef01, 0xef02, 0xef03, 0xef04, 0xef05, 0xef06, 0x2004, 0x2009, 0x205f].includes(mtcode)) {
          bytes.push(0x20);
          return;
        }
        const hasChar8 = !!(Number(value.options) & 0x04);
        const code = hasChar8 ? Number(value.char8) : mtcode;
        // Typeface 1 là kiểu chữ Text của MathType. Không giải mã ký hiệu toán.
        if (typeface !== 1 || !Number.isFinite(code) || code < 0 || code > 0xff) {
          valid = false;
          return;
        }
        bytes.push(code);
        if (code >= 0x80 && Object.prototype.hasOwnProperty.call(CV7991_TCVN3_BYTE_TO_UNICODE, String(code))) {
          hasLegacyByte = true;
        }
      };
      visit(node);
      if (!valid || !hasLegacyByte || !bytes.length) return '';

      let decoded = '';
      bytes.forEach((code) => {
        if (code >= 0x80 && Object.prototype.hasOwnProperty.call(CV7991_TCVN3_BYTE_TO_UNICODE, String(code))) {
          decoded += CV7991_TCVN3_BYTE_TO_UNICODE[String(code)];
        } else {
          decoded += String.fromCharCode(code);
        }
      });
      decoded = decoded
        .replace(/\u00a0/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
      try { decoded = decoded.normalize('NFC'); } catch (_) {}
      // Chỉ chấp nhận khi kết quả thực sự có chữ Việt; tránh đổi nhầm Latin-1.
      if (!/[ĂÂĐÊÔƠƯăâđêôơưÀ-ỹ]/u.test(decoded)) return '';
      return decoded;
    }

    function cv7991MtefArrowLabelTex(node, fallbackTex) {
      const decoded = cv7991MtefLegacyVietnameseText(node);
      return decoded ? `\\text{${cv7991MtefEscapeTextContent(decoded)}}` : String(fallbackTex || '');
    }

    function cv7991MtefDirectCharacterCode(node) {
      return node && node.tag === 2 ? (Number(node.value && node.value.mtcode) || 0) : 0;
    }

    function cv7991MtefLabeledRelationTex(command, top, bottom) {
      let relation = String(command || '');
      if (top) relation = `\\overset{${top}}{${relation}}`;
      if (bottom) relation = `\\underset{${bottom}}{${relation}}`;
      return `\\mathrel{${relation}}`;
    }

    function cv7991MtefFenceDefaults(selector) {
      const map = {
        0: ['\\langle', '\\rangle'], 1: ['(', ')'], 2: ['\\{', '\\}'],
        3: ['[', ']'], 4: ['|', '|'], 5: ['\\|', '\\|'],
        6: ['\\lfloor', '\\rfloor'], 7: ['\\lceil', '\\rceil'],
        8: ['[', ']'], 9: ['(', ')'],
      };
      return map[selector] || ['(', ')'];
    }

    function cv7991MtefTemplateTex(node) {
      const value = node && node.value || {};
      const selector = Number(value.selector);
      const variation = Number(value.variation) || 0;
      const slots = cv7991MtefChildrenTex(node);
      const slot = (index) => String(slots[index] || '');

      if (selector >= 0 && selector <= 9) {
        const main = slot(0) || '\\,';
        const defaults = cv7991MtefFenceDefaults(selector);
        let left = slot(1);
        let right = slot(2);
        // MathType lưu ngoặc một phía bằng một ký tự ngoặc duy nhất trong template.
        // Chỉ dùng cặp mặc định khi hoàn toàn không có ký tự ngoặc; nếu thiếu một phía
        // thì MathJax phải nhận dấu chấm vô hình, không tự sinh thêm ngoặc bên phải.
        if (!left && !right) {
          left = defaults[0];
          right = defaults[1];
        } else {
          if (!left) left = '.';
          if (!right) right = '.';
        }
        return `\\left${left || '.'} ${main} \\right${right || '.'}`;
      }
      if (selector === 10) return slot(1) ? `\\sqrt[${slot(1)}]{${slot(0)}}` : `\\sqrt{${slot(0)}}`;
      if (selector === 11) return (variation & 0x02)
        ? `{${slot(0)}}/{${slot(1)}}`
        : `\\frac{${slot(0)}}{${slot(1)}}`;
      if (selector === 12) return `\\underline{${slot(0)}}`;
      if (selector === 13) return `\\overline{${slot(0)}}`;
      if (selector === 14) {
        // Hai ô đầu là chú thích trên/dưới; các ô sau (nếu có) là glyph mũi tên.
        // Giải mã riêng chú thích .VnTime/TCVN3 trước khi giao cho MathJax.
        const top = cv7991MtefArrowLabelTex(node && node.children && node.children[0], slot(0));
        const bottom = cv7991MtefArrowLabelTex(node && node.children && node.children[1], slot(1));
        const firstArrowCode = cv7991MtefDirectCharacterCode(node && node.children && node.children[2]);
        const secondArrowCode = cv7991MtefDirectCharacterCode(node && node.children && node.children[3]);
        const rightHarpoons = new Set([0x21c0, 0x21c1]);
        const leftHarpoons = new Set([0x21bc, 0x21bd]);
        const isEquilibriumHarpoonPair = (
          rightHarpoons.has(firstArrowCode) && leftHarpoons.has(secondArrowCode)
        ) || (
          leftHarpoons.has(firstArrowCode) && rightHarpoons.has(secondArrowCode)
        );
        if (isEquilibriumHarpoonPair) {
          return cv7991MtefLabeledRelationTex('\\rightleftharpoons', top, bottom);
        }

        const isOppositeFullArrowPair = (
          firstArrowCode === 0x2192 && secondArrowCode === 0x2190
        ) || (
          firstArrowCode === 0x2190 && secondArrowCode === 0x2192
        );
        if (isOppositeFullArrowPair) {
          return cv7991MtefLabeledRelationTex('\\rightleftarrows', top, bottom);
        }

        let command = '\\xrightarrow';
        if ((variation & 0x10) && !(variation & 0x20)) command = '\\xleftarrow';
        else if (variation & 0x01) command = '\\xLeftrightarrow';
        return `${command}${bottom ? `[${bottom}]` : ''}{${top}}`;
      }
      if (selector >= 15 && selector <= 22) {
        const fixed = { 15: '\\int', 16: '\\sum', 17: '\\prod', 18: '\\coprod', 19: '\\bigcup', 20: '\\bigcap', 21: '\\int', 22: '\\sum' };
        let operator = slot(3) || fixed[selector] || '\\sum';
        if (slot(1)) operator += `_{${slot(1)}}`;
        if (slot(2)) operator += `^{${slot(2)}}`;
        return `${operator}${slot(0) ? ` ${slot(0)}` : ''}`;
      }
      if (selector === 23) return slot(1)
        ? `\\mathop{${slot(0)}}\\limits_{${slot(1)}}`
        : `\\mathop{${slot(0)}}`;
      if (selector === 24) return (variation & 0x01)
        ? `\\overbrace{${slot(0)}}^{${slot(1)}}`
        : `\\underbrace{${slot(0)}}_{${slot(1)}}`;
      if (selector === 25) return (variation & 0x01)
        ? `\\overline{${slot(0)}}^{${slot(1)}}`
        : `\\underline{${slot(0)}}_{${slot(1)}}`;
      if (selector === 26) return `\\overline{${slot(0)}\\smash{)\\,${slot(1)}}}`;
      if (selector === 27) return `${slot(0) ? `_{${slot(0)}}` : ''}${slot(1) ? `^{${slot(1)}}` : ''}`;
      if (selector === 28) return `^{${slot(1) || slot(0)}}${slot(1) && slot(0) ? `{${slot(0)}}` : ''}`;
      if (selector === 29) return `${slot(0) ? `_{${slot(0)}}` : ''}${slot(1) ? `^{${slot(1)}}` : ''}`;
      if (selector === 30) return `\\left\\langle ${slot(0)} \\middle| ${slot(1)} \\right\\rangle`;
      if (selector === 31) {
        const under = !!(variation & 0x04);
        const harpoon = !!(variation & 0x08);
        const left = !!(variation & 0x01);
        const right = !!(variation & 0x02);
        let command = '\\overrightarrow';
        if (harpoon) command = left ? '\\overleftharpoon' : '\\overrightharpoon';
        else if (under) command = left && !right ? '\\underleftarrow' : '\\underrightarrow';
        else if (left && right) command = '\\overleftrightarrow';
        else if (left) command = '\\overleftarrow';
        return command === '\\overrightarrow'
          ? cv7991MathTypeVectorAccentTex(slot(0))
          : `${command}{${slot(0)}}`;
      }
      if (selector === 32) return `\\widetilde{${slot(0)}}`;
      if (selector === 33) return `\\widehat{${slot(0)}}`;
      if (selector === 34) return `\\overparen{${slot(0)}}`;
      if (selector === 35) return `\\overset{${slot(1)}}{${slot(0)}}`;
      if (selector === 36) {
        if (variation & 0x01) return `\\cancelto{}{${slot(0)}}`;
        if ((variation & 0x06) === 0x06) return `\\xcancel{${slot(0)}}`;
        if (variation & 0x02) return `\\cancel{${slot(0)}}`;
        if (variation & 0x04) return `\\bcancel{${slot(0)}}`;
        return slot(0);
      }
      if (selector === 37) return `\\boxed{${slot(0)}}`;
      return slots.join('');
    }

    function cv7991MtefToTex(node) {
      if (!node) return '';
      if (node.tag === 255 || node.tag === 1) return cv7991MtefChildrenTex(node).join('');
      if (node.tag === 2) return cv7991MtefApplyEmbellishments(cv7991MtefCharacterTex(node.value), node.embellishments);
      if (node.tag === 3) return cv7991MtefTemplateTex(node);
      if (node.tag === 4) {
        const rows = cv7991MtefChildrenTex(node).filter((value) => String(value || '').trim());
        // MTEF PILE không có điểm căn dấu bằng. Dùng cột l để mọi dòng bắt đầu
        // cùng một mép trái, đúng như hệ điều kiện trong file Word.
        return rows.length <= 1 ? (rows[0] || '') : `\\begin{array}{l}${rows.join('\\\\')}\\end{array}`;
      }
      if (node.tag === 5) {
        const columns = Math.max(1, Number(node.value && node.value.columns) || 1);
        const cells = cv7991MtefChildrenTex(node).filter((value) => String(value || '').trim());
        const rows = [];
        for (let i = 0; i < cells.length; i += columns) rows.push(cells.slice(i, i + columns).join('&'));
        return `\\begin{matrix}${rows.join('\\\\')}\\end{matrix}`;
      }
      return '';
    }

    function cv7991NormalizeMtefTex(tex) {
      return cv7991NormalizeMathTypeAccentTex(String(tex || '')
        .replace(/\\@#/g, '\\#')
        .replace(/\\And\s*/g, '\\wedge ')
        .replace(/\\rm\s*\{/g, '\\mathrm{')
        .replace(/\\mathrm\{\s*~\s*\}/g, '\\,')
        .replace(/\^\{\s*'\s*\}/g, '^{\\prime}')
        .replace(/\s+/g, ' ')
        .replace(/\s+([,.;:)\]])/g, '$1')
        .replace(/([([])\s+/g, '$1')
        .trim());
    }


    function cv7991SanitizeEmbeddedMathTypeTex(value) {
      let tex = String(value || '')
        .replace(/[\u0000-\u001f]+/g, ' ')
        .trim();
      /* Bản trước xóa quá mạnh tiền tố bắt đầu bằng chữ F/f nên những công thức
         như F(x)=... bị mất luôn ký tự đầu. Chỉ bỏ đúng tiền tố rác "f" nếu nó
         đứng trước một lệnh TeX bắt đầu bằng dấu gạch chéo ngược; còn F(x), f(x),
         Fx, ... phải được giữ nguyên. */
      tex = tex.replace(/^\s*f(?=\s*\\)/, '');
      return cv7991NormalizeMathTypeAccentTex(tex.trim());
    }

    function cv7991MathTypeTexLooksReliableForItem(image, tex) {
      const normalized = String(tex || '').replace(/\s+/g, ' ').trim();
      if (!normalized) return false;
      const compact = normalized.replace(/\s+/g, '');
      if (!compact) return false;
      /* Một số file MathType cũ lưu MTEF trong OLE bị lệch bảng mã: chuỗi
         đọc ra có các ký tự CJK lạ như 䕯, 䔵, 䕃 thay cho phần còn lại của
         công thức (ví dụ cos36°, 15 cm). Khi gặp dạng này phải bỏ nguồn OLE
         và thử lại ảnh preview WMF, vì WMF vẫn giữ đầy đủ MTEF đúng. */
      if (/[�㐀-鿿豈-﫿]/.test(compact)) return false;
      if (/^[)\]}.,;:]+$/.test(compact)) return false;
      const widthPt = Number(image && image.displayWidthPt) || 0;
      const heightPt = Number(image && image.displayHeightPt) || 0;
      const hasTallStructure = /\\(?:frac|dfrac|tfrac|cfrac|sqrt|binom|genfrac|overline|underline|overrightarrow|overleftarrow|overparen|widehat|widetilde|vec)\b/i.test(normalized)
        || /[_^]/.test(normalized);
      const hasMultiLineStructure = /\\begin\{(?:array|matrix|pmatrix|bmatrix|vmatrix|cases|aligned|align|gathered?|split)\}|\\\\|\\substack/i.test(normalized);
      const stripped = compact
        .replace(/\\[A-Za-z]+/g, 'x')
        .replace(/[{}]/g, '')
        .replace(/\[[^\]]*\]/g, '');
      const visibleLength = stripped.length;
      if (visibleLength <= 0) return false;
      if (heightPt >= 28 && visibleLength <= 2 && !hasTallStructure) return false;
      if (heightPt >= 40 && visibleLength < 8 && !hasMultiLineStructure && !hasTallStructure) return false;
      if (widthPt >= 36 && heightPt >= 24 && visibleLength <= 1) return false;
      if (/^[)\]}]/.test(compact)) return false;

      /* Một số MathType cũ có metadata MTEF bị cắt nhưng ảnh preview EMF vẫn
         đầy đủ. Ví dụ công thức PE có thể bị đọc nhầm chỉ còn "\\overline{(}".
         Không dùng TeX bị cụt; trả false để PowerPoint rơi về ảnh EMF gốc. */
      const rawParenOpen = (normalized.match(/\(/g) || []).length;
      const rawParenClose = (normalized.match(/\)/g) || []).length;
      if (rawParenOpen !== rawParenClose) return false;
      return true;
    }
    function cv7991ExtractMathTypeMtefTex(imageOrBytes) {
      const item = (imageOrBytes && typeof imageOrBytes === 'object' && Object.prototype.hasOwnProperty.call(imageOrBytes, 'data'))
        ? imageOrBytes
        : null;
      const data = item ? item.data : imageOrBytes;
      if (!data) return '';
      let bytes;
      try { bytes = cv7991MtefBytes(data); } catch (_) { return ''; }
      const starts = cv7991MtefFindStarts(bytes);
      let best = '';
      for (let i = starts.length - 1; i >= 0; i -= 1) {
        try {
          const parsed = cv7991MtefParseAt(bytes, starts[i].start);
          const candidate = cv7991NormalizeMtefTex(cv7991MtefToTex(parsed.root));
          if (candidate && candidate.length > best.length) best = candidate;
        } catch (_) {}
      }
      if (item && best) {
        item.presenterTex = best;
        item.presenterMtef = true;
        item.presenterFormula = true;
      }
      return best;
    }

    function cv7991EmbeddedMathTypeTexFromBytes(data, item) {
      if (!data) return '';
      let bytes;
      try {
        const buffer = cv7991ImageArrayBuffer(data);
        bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
      } catch (_) {
        return '';
      }

      // MathType có thể ghi sẵn chuỗi TeX trong OLE gốc hoặc ảnh WMF/EMF.
      const marker = 'TeX Input Language';
      const markerAt = cv7991FindByteSequence(bytes, marker, 0);
      if (markerAt >= 0) {
        let start = markerAt + marker.length;
        while (start < bytes.length && (bytes[start] === 0 || bytes[start] < 0x20)) start += 1;
        const endMarkerAt = cv7991FindByteSequence(bytes, 'WinAllBasicCodePages', start);
        let end = endMarkerAt >= 0 ? endMarkerAt : bytes.length;
        for (let i = start; i < end; i += 1) {
          if (bytes[i] === 0 || bytes[i] === 0x13) { end = i; break; }
        }
        if (end > start) {
          let tex = '';
          try {
            tex = new TextDecoder('windows-1252').decode(bytes.slice(start, end));
          } catch (_) {
            for (let i = start; i < end; i += 1) tex += String.fromCharCode(bytes[i]);
          }
          tex = cv7991SanitizeEmbeddedMathTypeTex(tex);

          // Chấp nhận cả công thức TeX đầy đủ và công thức đơn giản như I=UR.
          const compactTex = tex.replace(/\s+/g, '');
          const hasTexCommandOrScript = /[\\{}_^]/.test(tex);
          const hasMathOperator = /[=+\-*/÷×<>≤≥≈≠∠√π∞]/.test(tex);
          const hasLettersOrDigits = /[A-Za-z0-9]/.test(tex);
          const looksLikePlainFormula = hasLettersOrDigits && (
            hasMathOperator
            || /[A-Za-z]\d|\d[A-Za-z]/.test(compactTex)
            || /^[A-Za-z]{2,}\d*$/.test(compactTex)
          );
          if (tex && (hasTexCommandOrScript || looksLikePlainFormula)
              && cv7991MathTypeTexLooksReliableForItem(item, tex)) {
            return tex;
          }
        }
      }
      return '';
    }

    function cv7991ExtractMathTypeTex(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || (!item.data && !item.oleData)) return '';
      if (typeof item.presenterTex === 'string' && item.presenterTex.trim()) return item.presenterTex.trim();

      /* OLE là nguồn đầy đủ nhất: nhiều WMF chỉ giữ được đoạn đầu của công
         thức MTEF. Dùng WMF sau cùng để tương thích các DOCX cũ không nhúng OLE. */
      const sources = [];
      if (item.oleData) sources.push({ data: item.oleData, name: 'ole' });
      if (item.data && item.data !== item.oleData) sources.push({ data: item.data, name: 'preview' });

      for (const source of sources) {
        const embeddedTex = cv7991EmbeddedMathTypeTexFromBytes(source.data, item);
        if (!embeddedTex) continue;
        item.presenterTex = embeddedTex;
        item.presenterFormula = true;
        item.presenterMathTypeSource = source.name === 'ole' ? 'embedded-tex-ole' : 'embedded-tex-preview';
        return embeddedTex;
      }

      // Các file Word MathType thông dụng không có chuỗi TeX sẵn, mà lưu
      // MTEF v5 trong ảnh preview WMF/EMF. Với vài file cũ, phần MTEF trong
      // OLE bị cắt hoặc lệch mã (tanx=, P=4c䕯...), còn preview vẫn đầy đủ,
      // nên ưu tiên preview ở bước MTEF; OLE vẫn được dùng trước ở bước TeX nhúng.
      const mtefSources = sources.slice().sort((a, b) => (
        (a && a.name === 'preview' ? 0 : 1) - (b && b.name === 'preview' ? 0 : 1)
      ));
      for (const source of mtefSources) {
        const mtefTex = typeof cv7991ExtractMathTypeMtefTex === 'function'
          ? cv7991ExtractMathTypeMtefTex(source.data)
          : '';
        if (mtefTex && cv7991MathTypeTexLooksReliableForItem(item, mtefTex)) {
          item.presenterTex = mtefTex;
          item.presenterMtef = true;
          item.presenterFormula = true;
          item.presenterMathTypeSource = source.name === 'ole' ? 'ole-mtef-v5' : 'mtef-v5';
          return mtefTex;
        }
      }
      return '';
    }

    function cv7991WaitForMathJax() {
      const ready = () => window.MathJax && typeof window.MathJax.tex2svg === 'function';
      if (ready()) return Promise.resolve(window.MathJax);
      return new Promise((resolve, reject) => {
        let ticks = 0;
        const timer = setInterval(async () => {
          try {
            if (window.MathJax && window.MathJax.startup && window.MathJax.startup.promise) {
              await window.MathJax.startup.promise;
            }
          } catch (_) {}
          if (ready()) {
            clearInterval(timer);
            resolve(window.MathJax);
          } else if (ticks++ > 120) {
            clearInterval(timer);
            reject(new Error('Chưa tải được bộ hiển thị công thức MathJax.'));
          }
        }, 125);
      });
    }

    function cv7991RepairOverparenSvg(svg, tex) {
      if (!(svg instanceof SVGElement) || !/\\overparen\s*\{/.test(String(tex || ''))) return svg;
      const requestedArcCount = (String(tex || '').match(/\\overparen\s*\{/g) || []).length;
      const movers = Array.from(svg.querySelectorAll('[data-mml-node="mover"]'));
      if (!movers.length || !requestedArcCount) return svg;

      /* U+23DC là TOP PARENTHESIS mà MathJax/mathtools dùng cho overparen.
         Một số bản MathJax còn giữ glyph frown U+2322 trước khi kéo giãn. */
      let arcMovers = movers.filter((mover) => {
        const accent = mover.children && mover.children[1];
        return accent && accent.querySelector([
          '[data-c="23DC"]',
          '[data-c="2322"]',
        ].join(', '));
      });
      /* Công thức MathType chỉ chứa riêng cung ABC có đúng một mover. Dự phòng
         này giúp các bản MathJax mã hóa glyph nội bộ khác nhau vẫn được sửa,
         nhưng tuyệt đối không chọn nhầm mover véc tơ trong công thức phức hợp. */
      if (!arcMovers.length && movers.length === requestedArcCount) arcMovers = movers.slice();

      arcMovers.slice(0, requestedArcCount).forEach((mover) => {
        const accent = mover.children && mover.children[1];
        if (!(accent instanceof SVGElement)) return;

        let arcX = 0;
        let arcWidth = 0;
        /* Với công thức chỉ có một cung, viewBox ngoài chính là khung cuối cùng
           của toàn bộ chữ nền ABC. Phải ưu tiên khung này; getBBox của accent
           chỉ trả về glyph cung chưa kéo giãn nên trước đây bị dừng giữa chữ C. */
        if (movers.length === 1) {
          const viewBox = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
          if (viewBox.length === 4 && Number(viewBox[2]) > 240) {
            arcX = Number(viewBox[0]) || 0;
            arcWidth = Number(viewBox[2]) || 0;
          }
        }
        if (!(arcWidth > 240)) {
          const nativeViewport = accent.querySelector('svg');
          const viewportX = Number(nativeViewport && nativeViewport.getAttribute('x')) || 0;
          const viewportWidth = Number(nativeViewport && nativeViewport.getAttribute('width')) || 0;
          if (viewportWidth > 240) {
            arcX = viewportX;
            arcWidth = viewportWidth;
          }
        }
        if (!(arcWidth > 240)) {
          try {
            const box = accent.getBBox();
            if (box && Number(box.width) > 0) {
              arcX = Number(box.x) || 0;
              arcWidth = Number(box.width) || 0;
            }
          } catch (_) {}
        }
        if (!(arcWidth > 240)) return;

        /* Nếu đường cong nằm trong một mover có độ rộng riêng, mở thêm rất
           nhẹ về hai phía để phủ hết phần nghiêng của A và C. */
        if (movers.length > 1) {
          try {
            const base = mover.children && mover.children[0];
            const baseBox = base && base.getBBox ? base.getBBox() : null;
            if (baseBox && Number(baseBox.width) > arcWidth) {
              arcX = Number(baseBox.x) || arcX;
              arcWidth = Number(baseBox.width) || arcWidth;
            }
          } catch (_) {}
        }

        while (accent.firstChild) accent.removeChild(accent.firstChild);
        const inset = Math.max(18, Math.min(70, arcWidth * 0.025));
        const startX = arcX + inset;
        const endX = arcX + arcWidth - inset;
        const centerX = (startX + endX) / 2;
        const endY = -175;
        /* Ảnh Word gốc: độ vồng tại tâm xấp xỉ 9% bề rộng cung. Với đường
           Bézier bậc hai, điểm giữa chỉ đi nửa khoảng tới điểm điều khiển nên
           dùng 18% để thu được đúng độ cong nhìn thấy. */
        const controlY = endY + Math.max(210, Math.min(430, arcWidth * 0.18));
        const arc = document.createElementNS('http://www.w3.org/2000/svg', 'path');
        arc.setAttribute('data-mvip-overparen-arc', '1');
        arc.setAttribute('d', [
          `M ${Math.round(startX)} ${endY}`,
          `Q ${Math.round(centerX)} ${Math.round(controlY)}`,
          `${Math.round(endX)} ${endY}`,
        ].join(' '));
        arc.setAttribute('fill', 'none');
        arc.setAttribute('stroke', 'currentColor');
        arc.setAttribute('stroke-width', '48');
        arc.setAttribute('stroke-linecap', 'round');
        arc.setAttribute('stroke-linejoin', 'round');
        accent.appendChild(arc);
      });
      return svg;
    }

    function cv7991MathJaxSvgFromTex(mathJax, tex) {
      if (!mathJax || typeof mathJax.tex2svg !== 'function') return null;
      const wrapper = mathJax.tex2svg(String(tex || ''), { display: false });
      const svg = wrapper && wrapper.querySelector ? wrapper.querySelector('svg') : null;
      if (!svg) return null;
      const clone = svg.cloneNode(true);
      clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
      clone.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
      clone.setAttribute('color', '#111111');
      clone.style.color = '#111111';
      clone.style.background = 'transparent';
      clone.style.overflow = 'visible';
      cv7991RepairOverparenSvg(clone, tex);
      /* Hai đoạn nối của overbrace/underbrace và nét overline/underline được
         MathJax đặt trong các SVG viewport lồng nhau. Khi markup này đi qua
         innerHTML của trang Word, một số trình duyệt giữ hai móc/nút giữa
         nhưng cho viewport lồng nhau kích thước 0; vì thế ngoặc bị vỡ và nét
         gạch biến mất. Đổi riêng các viewport chứa glyph kéo giãn ngang
         E154/2013 và glyph nối dọc 23AA/239C/239F thành g + clipPath tương
         đương trong cùng hệ tọa độ của SVG ngoài.
         Hình học MathJax được giữ nguyên nhưng không còn phụ thuộc SVG lồng. */
      const viewportSerial = (Number(cv7991MathJaxSvgFromTex.viewportSerial) || 0) + 1;
      cv7991MathJaxSvgFromTex.viewportSerial = viewportSerial;
      Array.from(clone.querySelectorAll('svg')).forEach((nestedSvg, nestedIndex) => {
        const stretchGlyph = nestedSvg.querySelector([
          'path[data-c="E154"]',
          'path[data-c="2013"]',
          'path[data-c="23AA"]',
          'path[data-c="239C"]',
          'path[data-c="239F"]',
        ].join(', '));
        const viewBox = String(nestedSvg.getAttribute('viewBox') || '').trim()
          .split(/[\s,]+/).map(Number);
        const viewportX = Number(nestedSvg.getAttribute('x')) || 0;
        const viewportY = Number(nestedSvg.getAttribute('y')) || 0;
        const viewportWidth = Number(nestedSvg.getAttribute('width')) || 0;
        const viewportHeight = Number(nestedSvg.getAttribute('height')) || 0;
        if (stretchGlyph && viewBox.length >= 4
            && viewportWidth > 0 && viewportHeight > 0
            && viewBox[2] > 0 && viewBox[3] > 0
            && nestedSvg.parentNode) {
          const svgNs = 'http://www.w3.org/2000/svg';
          const viewportGroup = document.createElementNS(svgNs, 'g');
          viewportGroup.setAttribute('data-mvip-mathjax-viewport', '1');
          viewportGroup.setAttribute('transform', `translate(${viewportX} ${viewportY})`);

          const clipId = `cv7991-mjx-viewport-${viewportSerial}-${nestedIndex + 1}`;
          const definitions = document.createElementNS(svgNs, 'defs');
          const clipPath = document.createElementNS(svgNs, 'clipPath');
          clipPath.setAttribute('id', clipId);
          clipPath.setAttribute('clipPathUnits', 'userSpaceOnUse');
          const clipRect = document.createElementNS(svgNs, 'rect');
          clipRect.setAttribute('x', '0');
          clipRect.setAttribute('y', '0');
          clipRect.setAttribute('width', String(viewportWidth));
          clipRect.setAttribute('height', String(viewportHeight));
          clipPath.appendChild(clipRect);
          definitions.appendChild(clipPath);
          viewportGroup.appendChild(definitions);

          const clippedGroup = document.createElementNS(svgNs, 'g');
          clippedGroup.setAttribute('clip-path', `url(#${clipId})`);
          const mappedGroup = document.createElementNS(svgNs, 'g');
          const scale = Math.min(viewportWidth / viewBox[2], viewportHeight / viewBox[3]);
          const offsetX = Math.max(0, (viewportWidth - viewBox[2] * scale) / 2);
          const offsetY = Math.max(0, (viewportHeight - viewBox[3] * scale) / 2);
          mappedGroup.setAttribute('transform', [
            `translate(${offsetX} ${offsetY})`,
            `scale(${scale})`,
            `translate(${-viewBox[0]} ${-viewBox[1]})`,
          ].join(' '));
          while (nestedSvg.firstChild) mappedGroup.appendChild(nestedSvg.firstChild);
          clippedGroup.appendChild(mappedGroup);
          viewportGroup.appendChild(clippedGroup);
          nestedSvg.parentNode.replaceChild(viewportGroup, nestedSvg);
          return;
        }

        /* Các viewport khác vẫn giữ đúng width/height hình học do MathJax đặt;
           chỉ gỡ giới hạn max-size từ CSS của khung trình chiếu. */
        nestedSvg.style.setProperty('max-width', 'none', 'important');
        nestedSvg.style.setProperty('max-height', 'none', 'important');
        nestedSvg.style.setProperty('overflow', 'hidden', 'important');
      });
      return clone;
    }

    /* MathJax đặt đường cơ sở toán học tại tung độ 0 của viewBox. Khi SVG được
       raster hóa bằng preserveAspectRatio="xMidYMid meet", quy đổi đường cơ sở
       này sang tỷ lệ chiều cao của chính ảnh PNG đầu ra. Tỷ lệ thu được là dữ
       liệu ổn định cho từng công thức: số 4 có baseline ở đáy, chữ y có phần
       thòng xuống, phân số/căn thức có độ sâu riêng. */
    function cv7991MathJaxRasterBaselineRatio(svg, raster) {
      if (!(svg instanceof Element)) return 0;
      const outputWidth = Math.max(1, Number(raster && raster.width) || 1);
      const outputHeight = Math.max(1, Number(raster && raster.height) || 1);
      try {
        const raw = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (raw.length >= 4) {
          const viewX = Number(raw[0]);
          const viewY = Number(raw[1]);
          const viewWidth = Number(raw[2]);
          const viewHeight = Number(raw[3]);
          const baselineInView = -viewY;
          if (Number.isFinite(viewX) && Number.isFinite(viewY)
              && viewWidth > 0 && viewHeight > 0
              && baselineInView >= -0.001 && baselineInView <= viewHeight + 0.001) {
            const scale = Math.min(outputWidth / viewWidth, outputHeight / viewHeight);
            const renderedHeight = viewHeight * scale;
            const offsetY = Math.max(0, (outputHeight - renderedHeight) / 2);
            const baselineY = offsetY + baselineInView * scale;
            const ratio = baselineY / outputHeight;
            if (Number.isFinite(ratio) && ratio >= 0.02 && ratio <= 1.02) {
              return Math.max(0.02, Math.min(1, ratio));
            }
          }
        }
      } catch (_) {}

      /* Dự phòng theo height và vertical-align do MathJax sinh. Ví dụ chữ y có
         height 1,464ex và vertical-align -0,464ex, nên baseline nằm tại
         1 - 0,464/1,464 = 0,683 chiều cao SVG. */
      try {
        const heightMatch = String(svg.getAttribute('height') || '').match(/(-?\d*\.?\d+)ex/i);
        const alignMatch = String(svg.style && svg.style.verticalAlign || svg.getAttribute('style') || '')
          .match(/vertical-align\s*:\s*(-?\d*\.?\d+)ex/i);
        const heightEx = heightMatch ? Number(heightMatch[1]) : 0;
        const alignEx = alignMatch ? Number(alignMatch[1]) : 0;
        if (heightEx > 0 && Number.isFinite(alignEx)) {
          const ratio = 1 + alignEx / heightEx;
          if (ratio >= 0.02 && ratio <= 1.02) return Math.max(0.02, Math.min(1, ratio));
        }
      } catch (_) {}
      return 0;
    }

    const CV7991_MATHTYPE_RENDER_CACHE = new Map();

    async function cv7991ConvertMathTypeTexForPresenter(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || !item.data) return '';
      const tex = cv7991ExtractMathTypeTex(item);
      if (!tex) return '';

      const metrics = cv7991MetafileMetrics(item);
      if (!(Number(item.displayWidthPt) > 0) && Number(metrics.naturalWidthPt) > 0) item.displayWidthPt = metrics.naturalWidthPt;
      if (!(Number(item.displayHeightPt) > 0) && Number(metrics.naturalHeightPt) > 0) item.displayHeightPt = metrics.naturalHeightPt;
      const raster = cv7991PresenterRasterSize(item, metrics);
      const cacheKey = `${tex}\u0000${Math.max(1, Math.round(raster.width))}x${Math.max(1, Math.round(raster.height))}`;
      const cached = CV7991_MATHTYPE_RENDER_CACHE.get(cacheKey);
      if (cached) {
        item.presenterTex = tex;
        item.presenterSvgMarkup = cached.presenterSvgMarkup;
        item.presenterDataUrl = cached.presenterDataUrl;
        item.presenterMimeType = cached.presenterMimeType;
        item.presenterVectorScore = cached.presenterVectorScore;
        item.presenterBaselineRatio = Number(cached.presenterBaselineRatio) || 0;
        item.presenterCropApplied = !!cached.presenterCropApplied;
        item.presenterCropLeftRatio = Number(cached.presenterCropLeftRatio) || 0;
        item.presenterCropTopRatio = Number(cached.presenterCropTopRatio) || 0;
        item.presenterCropWidthRatio = Number(cached.presenterCropWidthRatio) || 1;
        item.presenterCropHeightRatio = Number(cached.presenterCropHeightRatio) || 1;
        item.presenterOriginalAspectRatio = Number(cached.presenterOriginalAspectRatio) || 0;
        item.presenterCroppedAspectRatio = Number(cached.presenterCroppedAspectRatio) || 0;
        item.presenterOriginalInkWidthRatio = Number(cached.presenterOriginalInkWidthRatio) || 0;
        item.presenterOriginalInkHeightRatio = Number(cached.presenterOriginalInkHeightRatio) || 0;
        item.presenterOriginalTypicalColumnSpan75Ratio = Number(cached.presenterOriginalTypicalColumnSpan75Ratio) || 0;
        item.presenterRasterWidth = Number(cached.presenterRasterWidth) || 0;
        item.presenterRasterHeight = Number(cached.presenterRasterHeight) || 0;
        item.presenterRenderKind = 'mathtype-tex';
        item.presenterRenderCached = true;
        return item.presenterDataUrl;
      }

      const mathJax = await cv7991WaitForMathJax();
      const svg = cv7991MathJaxSvgFromTex(mathJax, tex);
      if (!svg) throw new Error('Không dựng được công thức MathType từ dữ liệu TeX/MTEF.');
      const presenterBaselineRatio = cv7991MathJaxRasterBaselineRatio(svg, raster);
      svg.setAttribute('width', String(Math.max(1, Math.round(raster.width))));
      svg.setAttribute('height', String(Math.max(1, Math.round(raster.height))));
      svg.setAttribute('preserveAspectRatio', 'xMidYMid meet');
      const rendered = await cv7991RasterizeVectorSvg(svg, raster);
      if (!rendered || !rendered.dataUrl || !(Number(rendered.score) > 0)) {
        throw new Error('Ảnh công thức MathType sau chuyển đổi bị rỗng.');
      }
      const cropped = await cv7991CropMathTypeRenderedOutput({
        dataUrl: rendered.dataUrl,
        svg,
        svgMarkup: rendered.serialized || new XMLSerializer().serializeToString(svg),
        sourceWidth: Math.max(1, Math.round(raster.width)),
        sourceHeight: Math.max(1, Math.round(raster.height)),
        baselineRatio: Number(presenterBaselineRatio) || 0,
        score: Number(rendered.score) || 0,
      });

      const result = {
        presenterSvgMarkup: cropped.svgMarkup || rendered.serialized || new XMLSerializer().serializeToString(svg),
        presenterDataUrl: cropped.dataUrl || rendered.dataUrl,
        presenterMimeType: 'image/png',
        presenterVectorScore: Number(rendered.score) || 0,
        presenterBaselineRatio: Number(cropped.baselineRatio) || Number(presenterBaselineRatio) || 0,
        presenterCropApplied: !!cropped.cropApplied,
        presenterCropLeftRatio: Number(cropped.cropLeftRatio) || 0,
        presenterCropTopRatio: Number(cropped.cropTopRatio) || 0,
        presenterCropWidthRatio: Number(cropped.cropWidthRatio) || 1,
        presenterCropHeightRatio: Number(cropped.cropHeightRatio) || 1,
        presenterOriginalAspectRatio: Number(cropped.originalAspectRatio) || (Math.max(1, Number(raster.width) || 1) / Math.max(1, Number(raster.height) || 1)),
        presenterCroppedAspectRatio: Number(cropped.croppedAspectRatio) || 0,
        presenterOriginalInkWidthRatio: Number(cropped.originalInkWidthRatio) || 0,
        presenterOriginalInkHeightRatio: Number(cropped.originalInkHeightRatio) || 0,
        presenterOriginalTypicalColumnSpan75Ratio: Number(cropped.originalTypicalColumnSpan75Ratio) || 0,
        presenterRasterWidth: Math.max(1, Math.round(Number(raster.width) || 1)),
        presenterRasterHeight: Math.max(1, Math.round(Number(raster.height) || 1)),
      };
      item.presenterTex = tex;
      item.presenterSvgMarkup = result.presenterSvgMarkup;
      item.presenterDataUrl = result.presenterDataUrl;
      item.presenterMimeType = result.presenterMimeType;
      item.presenterVectorScore = result.presenterVectorScore;
      item.presenterBaselineRatio = result.presenterBaselineRatio;
      item.presenterCropApplied = result.presenterCropApplied;
      item.presenterCropLeftRatio = result.presenterCropLeftRatio;
      item.presenterCropTopRatio = result.presenterCropTopRatio;
      item.presenterCropWidthRatio = result.presenterCropWidthRatio;
      item.presenterCropHeightRatio = result.presenterCropHeightRatio;
      item.presenterOriginalAspectRatio = result.presenterOriginalAspectRatio;
      item.presenterCroppedAspectRatio = result.presenterCroppedAspectRatio;
      item.presenterOriginalInkWidthRatio = result.presenterOriginalInkWidthRatio;
      item.presenterOriginalInkHeightRatio = result.presenterOriginalInkHeightRatio;
      item.presenterOriginalTypicalColumnSpan75Ratio = result.presenterOriginalTypicalColumnSpan75Ratio;
      item.presenterRasterWidth = result.presenterRasterWidth;
      item.presenterRasterHeight = result.presenterRasterHeight;
      item.presenterRenderKind = 'mathtype-tex';
      CV7991_MATHTYPE_RENDER_CACHE.set(cacheKey, result);
      return item.presenterDataUrl;
    }

    function cv7991WaitForVectorRenderer(kind) {
      const wanted = kind === 'emf' ? 'EMFJS' : 'WMFJS';
      if (window[wanted] && window[wanted].Renderer) return Promise.resolve(window[wanted]);
      return new Promise((resolve, reject) => {
        let ticks = 0;
        const timer = setInterval(() => {
          const lib = window[wanted];
          if (lib && lib.Renderer) {
            clearInterval(timer);
            try { if (typeof lib.loggingEnabled === 'function') lib.loggingEnabled(false); } catch (_) {}
            resolve(lib);
          } else if (ticks++ > 80) {
            clearInterval(timer);
            reject(new Error(`Chưa tải được thư viện đọc ảnh ${kind.toUpperCase()} của Word.`));
          }
        }, 125);
      });
    }

    function cv7991MetafileMetrics(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || !item.data) return {};
      const kind = cv7991PresenterImageKind(item);
      let buffer;
      try { buffer = cv7991ImageArrayBuffer(item.data); } catch (_) { return {}; }
      if (!(buffer instanceof ArrayBuffer) || buffer.byteLength < 24) return {};
      const view = new DataView(buffer);
      try {
        if (kind === 'wmf' && view.getUint32(0, true) === 0x9ac6cdd7 && buffer.byteLength >= 22) {
          const left = view.getInt16(6, true);
          const top = view.getInt16(8, true);
          const right = view.getInt16(10, true);
          const bottom = view.getInt16(12, true);
          const unitsPerInch = Math.abs(view.getInt16(14, true)) || 1440;
          const logicalWidth = Math.max(1, Math.abs(right - left));
          const logicalHeight = Math.max(1, Math.abs(bottom - top));
          return {
            kind,
            left,
            top,
            logicalWidth,
            logicalHeight,
            unitsPerInch,
            naturalWidthPt: logicalWidth * 72 / unitsPerInch,
            naturalHeightPt: logicalHeight * 72 / unitsPerInch,
          };
        }
        if (kind === 'emf' && view.getUint32(0, true) === 1 && buffer.byteLength >= 88) {
          const left = view.getInt32(8, true);
          const top = view.getInt32(12, true);
          const right = view.getInt32(16, true);
          const bottom = view.getInt32(20, true);
          const frameLeft = view.getInt32(24, true);
          const frameTop = view.getInt32(28, true);
          const frameRight = view.getInt32(32, true);
          const frameBottom = view.getInt32(36, true);
          const logicalWidth = Math.max(1, Math.abs(right - left));
          const logicalHeight = Math.max(1, Math.abs(bottom - top));
          const frameWidth01mm = Math.abs(frameRight - frameLeft);
          const frameHeight01mm = Math.abs(frameBottom - frameTop);
          return {
            kind,
            left,
            top,
            logicalWidth,
            logicalHeight,
            naturalWidthPt: frameWidth01mm > 0 ? frameWidth01mm / 100 / 25.4 * 72 : 0,
            naturalHeightPt: frameHeight01mm > 0 ? frameHeight01mm / 100 / 25.4 * 72 : 0,
          };
        }
      } catch (_) {}
      return { kind };
    }

    function cv7991ImageIntrinsicAspectRatio(image, metrics = null) {
      const item = (image && typeof image === 'object') ? image : {};
      const croppedRatio = Number(item.presenterCroppedAspectRatio) || 0;
      if (item.presenterCropApplied && croppedRatio > 0.02 && croppedRatio < 80) return croppedRatio;
      const candidates = [];
      const add = (width, height) => {
        const w = Number(width) || 0;
        const h = Number(height) || 0;
        if (w > 0 && h > 0) candidates.push(w / h);
      };
      add(item.width, item.height);
      add(item.naturalWidth, item.naturalHeight);
      add(item.videoWidth, item.videoHeight);
      const kind = cv7991PresenterImageKind(item);
      const m = metrics || (kind && item.data ? cv7991MetafileMetrics(item) : null);
      if (m) {
        add(m.logicalWidth, m.logicalHeight);
        add(m.naturalWidthPt, m.naturalHeightPt);
      }
      const svgText = String(item.presenterSvgMarkup || '');
      const viewBoxMatch = svgText.match(/viewBox=["']\s*[-+]?\d*\.?\d+\s+[-+]?\d*\.?\d+\s+([-+]?\d*\.?\d+)\s+([-+]?\d*\.?\d+)/i);
      if (viewBoxMatch) add(viewBoxMatch[1], viewBoxMatch[2]);
      const widthMatch = svgText.match(/\swidth=["']([-+]?\d*\.?\d+)/i);
      const heightMatch = svgText.match(/\sheight=["']([-+]?\d*\.?\d+)/i);
      if (widthMatch && heightMatch) add(widthMatch[1], heightMatch[1]);
      const ratio = candidates.find((value) => Number.isFinite(value) && value > 0.02 && value < 50) || 0;
      return ratio || 0;
    }

    function cv7991ImageWordDisplayAspectRatio(image) {
      const widthPt = Number(image && image.displayWidthPt) || 0;
      const heightPt = Number(image && image.displayHeightPt) || 0;
      const ratio = widthPt > 0 && heightPt > 0 ? widthPt / heightPt : 0;
      return Number.isFinite(ratio) && ratio > 0.02 && ratio < 50 ? ratio : 0;
    }

    function cv7991AspectRatiosDiffer(first, second, tolerance = 0.015) {
      const a = Number(first) || 0;
      const b = Number(second) || 0;
      if (!(a > 0) || !(b > 0)) return false;
      return Math.abs(a - b) / Math.max(a, b) > Math.max(0, Number(tolerance) || 0);
    }

    function cv7991PresenterVisualAspectRatio(image, metrics = null) {
      const item = (image && typeof image === 'object') ? image : {};
      const displayRatio = cv7991ImageWordDisplayAspectRatio(item);
      const intrinsicRatio = cv7991ImageIntrinsicAspectRatio(item, metrics);
      // Với hình minh họa, tỷ lệ đang hiển thị trong Word là tỷ lệ cần giữ nguyên khi trình chiếu.
      // Điều này đặc biệt quan trọng với WMF/EMF: hệ tọa độ bên trong có thể rộng hơn,
      // nhưng Word đã co lại để hình tròn vẫn là hình tròn.
      if (!cv7991PresenterImageIsFormula(item) && displayRatio > 0) return displayRatio;
      return intrinsicRatio > 0 ? intrinsicRatio : displayRatio;
    }

    function cv7991FitSizeToAspectRatio(widthPx, heightPx, aspectRatio) {
      let width = Number(widthPx) || 0;
      let height = Number(heightPx) || 0;
      const ratio = Number(aspectRatio) || 0;
      if (!(ratio > 0)) return { widthPx: width, heightPx: height };
      if (width > 0 && height > 0) {
        const currentRatio = width / height;
        if (Math.abs(currentRatio - ratio) / ratio > 0.015) {
          const widthFromHeight = height * ratio;
          const heightFromWidth = width / ratio;
          if (widthFromHeight <= width) width = widthFromHeight;
          else height = heightFromWidth;
        }
      } else if (width > 0) {
        height = width / ratio;
      } else if (height > 0) {
        width = height * ratio;
      }
      return { widthPx: width, heightPx: height };
    }

    function cv7991PresenterRasterSize(image, metrics) {
      const item = (image && typeof image === 'object') ? image : {};
      const intrinsicRatio = cv7991ImageIntrinsicAspectRatio(item, metrics);
      const displayRatio = cv7991ImageWordDisplayAspectRatio(item);
      const isFormula = cv7991PresenterImageIsFormula(item);
      const visualRatio = cv7991PresenterVisualAspectRatio(item, metrics) || intrinsicRatio || displayRatio;

      let displayWidthPx = (Number(item.displayWidthPt) || Number(metrics && metrics.naturalWidthPt) || 0) * 96 / 72;
      let displayHeightPx = (Number(item.displayHeightPt) || Number(metrics && metrics.naturalHeightPt) || 0) * 96 / 72;

      // Công thức vẫn bám tỷ lệ nội tại. Hình minh họa thì giữ đúng hộp hiển thị của Word.
      if (isFormula && intrinsicRatio > 0) {
        const fittedDisplay = cv7991FitSizeToAspectRatio(displayWidthPx, displayHeightPx, intrinsicRatio);
        displayWidthPx = fittedDisplay.widthPx;
        displayHeightPx = fittedDisplay.heightPx;
      } else if (visualRatio > 0) {
        if (!(displayWidthPx > 0) && displayHeightPx > 0) displayWidthPx = displayHeightPx * visualRatio;
        if (!(displayHeightPx > 0) && displayWidthPx > 0) displayHeightPx = displayWidthPx / visualRatio;
      }

      if (!(displayWidthPx > 0) && displayHeightPx > 0 && visualRatio > 0) displayWidthPx = displayHeightPx * visualRatio;
      if (!(displayHeightPx > 0) && displayWidthPx > 0 && visualRatio > 0) displayHeightPx = displayWidthPx / visualRatio;
      if (!(displayWidthPx > 0)) displayWidthPx = visualRatio > 0 ? 120 : 160;
      if (!(displayHeightPx > 0)) displayHeightPx = visualRatio > 0 ? displayWidthPx / visualRatio : 64;

      // Giới hạn kích thước xem trước bằng cùng một hệ số để không làm thay đổi tỷ lệ.
      const displayFit = Math.min(1, 900 / Math.max(1, displayWidthPx), 600 / Math.max(1, displayHeightPx));
      displayWidthPx = Math.max(4, displayWidthPx * displayFit);
      displayHeightPx = Math.max(4, displayHeightPx * displayFit);

      const renderScale = Math.min(5, Math.max(2.5, 320 / Math.max(displayWidthPx, displayHeightPx)));
      let rasterWidth = displayWidthPx * renderScale;
      let rasterHeight = displayHeightPx * renderScale;
      const rasterFit = Math.min(1, 2000 / Math.max(1, rasterWidth), 1400 / Math.max(1, rasterHeight));
      rasterWidth *= rasterFit;
      rasterHeight *= rasterFit;

      return {
        displayWidthPx,
        displayHeightPx,
        width: Math.max(48, Math.round(rasterWidth)),
        height: Math.max(32, Math.round(rasterHeight)),
        visualRatio: visualRatio || (displayWidthPx / Math.max(1, displayHeightPx)),
      };
    }

    function cv7991VectorCandidateSettings(kind, raster, metrics, image) {
      const list = [];
      const seen = new Set();
      const add = (settings) => {
        const key = JSON.stringify(settings);
        if (!seen.has(key)) { seen.add(key); list.push(settings); }
      };
      const addWithMapModes = (settings) => {
        [8, 1, 7, 6].forEach((mapMode) => add(Object.assign({}, settings, { mapMode })));
      };
      const sourceW = Math.max(1, Math.round(raster.width));
      const sourceH = Math.max(1, Math.round(raster.height));
      const logicalW = Math.max(0, Math.round(Number(metrics && metrics.logicalWidth) || 0));
      const logicalH = Math.max(0, Math.round(Number(metrics && metrics.logicalHeight) || 0));
      const twipW = Math.max(0, Math.round((Number(image && image.displayWidthPt) || Number(metrics && metrics.naturalWidthPt) || 0) * 20));
      const twipH = Math.max(0, Math.round((Number(image && image.displayHeightPt) || Number(metrics && metrics.naturalHeightPt) || 0) * 20));
      if (kind === 'emf') {
        if (logicalW && logicalH) addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, wExt: logicalW, hExt: logicalH, xExt: sourceW, yExt: sourceH });
        if (logicalW && logicalH) addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, wExt: logicalW, hExt: logicalH, xExt: logicalW, yExt: logicalH });
        if (twipW && twipH) addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, wExt: twipW, hExt: twipH, xExt: sourceW, yExt: sourceH });
        addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, wExt: sourceW, hExt: sourceH, xExt: sourceW, yExt: sourceH });
      } else {
        if (logicalW && logicalH) addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, xExt: logicalW, yExt: logicalH });
        if (twipW && twipH) addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, xExt: twipW, yExt: twipH });
        addWithMapModes({ width: `${sourceW}px`, height: `${sourceH}px`, xExt: sourceW, yExt: sourceH });
      }
      return list;
    }

    function cv7991RenderedSvgElement(rendered) {
      if (rendered && String(rendered.tagName || '').toLowerCase() === 'svg') return rendered;
      if (rendered && typeof rendered.querySelector === 'function') {
        const svg = rendered.querySelector('svg');
        if (svg) return svg;
      }
      if (rendered) return rendered.firstElementChild || rendered.firstChild || null;
      return null;
    }

    async function cv7991TightenVectorSvg(svg, fallbackViewBox, raster) {
      const source = svg && svg.cloneNode ? svg.cloneNode(true) : null;
      if (!source) return null;
      source.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
      source.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
      source.setAttribute('width', String(Math.max(1, Math.round(raster.width))));
      source.setAttribute('height', String(Math.max(1, Math.round(raster.height))));
      source.setAttribute('preserveAspectRatio', 'xMidYMid meet');
      source.setAttribute('overflow', 'visible');
      const host = document.createElement('div');
      host.style.cssText = 'position:fixed;left:-100000px;top:0;width:1px;height:1px;overflow:visible;opacity:0;pointer-events:none;z-index:-1';
      host.appendChild(source);
      document.body.appendChild(host);
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      let union = null;
      const merge = (box) => {
        if (!box || !Number.isFinite(box.x) || !Number.isFinite(box.y) || !Number.isFinite(box.width) || !Number.isFinite(box.height) || box.width <= 0 || box.height <= 0) return;
        if (!union) { union = { x: box.x, y: box.y, right: box.x + box.width, bottom: box.y + box.height }; return; }
        union.x = Math.min(union.x, box.x);
        union.y = Math.min(union.y, box.y);
        union.right = Math.max(union.right, box.x + box.width);
        union.bottom = Math.max(union.bottom, box.y + box.height);
      };
      const transformedBoxForNode = (node) => {
        if (!node || typeof node.getBBox !== 'function') return null;
        const box = node.getBBox();
        if (!box || !Number.isFinite(box.x) || !Number.isFinite(box.y) || !Number.isFinite(box.width) || !Number.isFinite(box.height)) return null;
        const nodeCtm = typeof node.getCTM === 'function' ? node.getCTM() : null;
        const rootCtm = typeof source.getCTM === 'function' ? source.getCTM() : null;
        if (!nodeCtm || !rootCtm || typeof rootCtm.inverse !== 'function') return box;
        let rel = null;
        try {
          const inv = rootCtm.inverse();
          rel = typeof inv.multiply === 'function' ? inv.multiply(nodeCtm) : null;
        } catch (_) {
          rel = null;
        }
        if (!rel) return box;
        const points = [
          [box.x, box.y],
          [box.x + box.width, box.y],
          [box.x, box.y + box.height],
          [box.x + box.width, box.y + box.height],
        ].map(([x, y]) => ({
          x: Number(rel.a) * x + Number(rel.c) * y + Number(rel.e),
          y: Number(rel.b) * x + Number(rel.d) * y + Number(rel.f),
        })).filter((point) => Number.isFinite(point.x) && Number.isFinite(point.y));
        if (points.length !== 4) return box;
        const xs = points.map((point) => point.x);
        const ys = points.map((point) => point.y);
        const x = Math.min(...xs);
        const y = Math.min(...ys);
        const right = Math.max(...xs);
        const bottom = Math.max(...ys);
        return { x, y, width: Math.max(0, right - x), height: Math.max(0, bottom - y) };
      };
      try {
        const graphics = Array.from(source.querySelectorAll('path,rect,line,polyline,polygon,circle,ellipse,text,image,use'));
        graphics.forEach((node) => {
          try {
            if (node.closest && node.closest('defs,clipPath,mask,pattern,marker')) return;
            const tag = String(node.tagName || '').toLowerCase();
            if (tag === 'rect') {
              const fill = String(node.getAttribute('fill') || '').toLowerCase();
              const stroke = String(node.getAttribute('stroke') || '').toLowerCase();
              if ((fill === 'none' || fill === 'transparent') && (stroke === 'none' || stroke === 'transparent' || !stroke)) return;
            }
            merge(transformedBoxForNode(node));
          } catch (_) {}
        });
        if (!union) {
          const directChildren = Array.from(source.children || []).filter((node) => !/^(defs|title|desc|metadata)$/i.test(String(node.tagName || '')));
          directChildren.forEach((node) => { try { merge(transformedBoxForNode(node)); } catch (_) {} });
        }
      } catch (_) {}
      host.remove();
      if (union) {
        const width = Math.max(1, union.right - union.x);
        const height = Math.max(1, union.bottom - union.y);
        const pad = Math.max(1, Math.min(width, height) * 0.035);
        source.setAttribute('viewBox', `${union.x - pad} ${union.y - pad} ${width + pad * 2} ${height + pad * 2}`);
      } else if (fallbackViewBox && fallbackViewBox.width > 0 && fallbackViewBox.height > 0) {
        source.setAttribute('viewBox', `${Number(fallbackViewBox.x) || 0} ${Number(fallbackViewBox.y) || 0} ${fallbackViewBox.width} ${fallbackViewBox.height}`);
      }
      return source;
    }

    function cv7991MathTypeCanvasInkBounds(canvas) {
      if (!(canvas instanceof HTMLCanvasElement) || !(canvas.width > 0) || !(canvas.height > 0)) return null;
      const context = canvas.getContext('2d', { willReadFrequently: true });
      if (!context) return null;
      let pixels;
      try { pixels = context.getImageData(0, 0, canvas.width, canvas.height).data; } catch (_) { return null; }
      let left = canvas.width;
      let right = -1;
      let top = canvas.height;
      let bottom = -1;
      const columnTop = new Int32Array(canvas.width);
      const columnBottom = new Int32Array(canvas.width);
      columnTop.fill(canvas.height);
      columnBottom.fill(-1);
      const isInk = (red, green, blue, alpha) => {
        if (alpha <= 10) return false;
        const min = Math.min(red, green, blue);
        const sum = red + green + blue;
        return min < 247 && sum < 738;
      };
      for (let y = 0; y < canvas.height; y += 1) {
        for (let x = 0; x < canvas.width; x += 1) {
          const position = (y * canvas.width + x) * 4;
          if (!isInk(pixels[position], pixels[position + 1], pixels[position + 2], pixels[position + 3])) continue;
          if (x < left) left = x;
          if (x > right) right = x;
          if (y < top) top = y;
          if (y > bottom) bottom = y;
          if (y < columnTop[x]) columnTop[x] = y;
          if (y > columnBottom[x]) columnBottom[x] = y;
        }
      }
      if (right < left || bottom < top) return null;
      const spans = [];
      for (let x = left; x <= right; x += 1) {
        if (columnBottom[x] >= columnTop[x]) spans.push(columnBottom[x] - columnTop[x] + 1);
      }
      spans.sort((a, b) => a - b);
      const span75 = spans.length
        ? spans[Math.max(0, Math.min(spans.length - 1, Math.round((spans.length - 1) * 0.75)))]
        : 0;
      return {
        left, right, top, bottom,
        width: right - left + 1,
        height: bottom - top + 1,
        typicalColumnSpan75: span75,
      };
    }

    function cv7991MathTypeTransparentCropDataUrl(sourceCanvas, crop) {
      if (!(sourceCanvas instanceof HTMLCanvasElement) || !crop) return '';
      const width = Math.max(1, Math.round(Number(crop.width) || 1));
      const height = Math.max(1, Math.round(Number(crop.height) || 1));
      const canvas = document.createElement('canvas');
      canvas.width = width;
      canvas.height = height;
      const context = canvas.getContext('2d', { willReadFrequently: true });
      if (!context) return '';
      context.clearRect(0, 0, width, height);
      context.drawImage(
        sourceCanvas,
        Math.max(0, Math.round(Number(crop.left) || 0)),
        Math.max(0, Math.round(Number(crop.top) || 0)),
        width,
        height,
        0,
        0,
        width,
        height
      );
      /* WMF/EMF dự phòng đôi khi có nền trắng đục. Chuyển riêng các điểm gần trắng
         thành trong suốt; phần nét đen, đỏ hoặc màu khác vẫn được giữ nguyên. */
      try {
        const imageData = context.getImageData(0, 0, width, height);
        const pixels = imageData.data;
        for (let i = 0; i < pixels.length; i += 4) {
          const red = pixels[i];
          const green = pixels[i + 1];
          const blue = pixels[i + 2];
          const alpha = pixels[i + 3];
          if (alpha <= 8) { pixels[i + 3] = 0; continue; }
          const light = Math.min(red, green, blue);
          if (light >= 250) {
            pixels[i + 3] = 0;
          } else if (light >= 235) {
            const fade = Math.max(0, Math.min(1, (250 - light) / 15));
            pixels[i + 3] = Math.round(alpha * fade);
          }
        }
        context.putImageData(imageData, 0, 0);
      } catch (_) {}
      try { return canvas.toDataURL('image/png'); } catch (_) { return ''; }
    }

    function cv7991MathTypeCropSvgMarkup(svgSource, sourceWidth, sourceHeight, crop) {
      if (!svgSource || !crop) return '';
      let svg = null;
      try {
        if (svgSource instanceof SVGElement) svg = svgSource.cloneNode(true);
        else {
          const doc = new DOMParser().parseFromString(String(svgSource || ''), 'image/svg+xml');
          svg = doc && doc.documentElement && String(doc.documentElement.localName || '').toLowerCase() === 'svg'
            ? doc.documentElement : null;
        }
      } catch (_) { svg = null; }
      if (!svg) return '';
      try {
        const raw = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (raw.length < 4 || !(raw[2] > 0) || !(raw[3] > 0)) return new XMLSerializer().serializeToString(svg);
        const viewX = raw[0];
        const viewY = raw[1];
        const viewWidth = raw[2];
        const viewHeight = raw[3];
        const rasterWidth = Math.max(1, Number(sourceWidth) || 1);
        const rasterHeight = Math.max(1, Number(sourceHeight) || 1);
        const scale = Math.min(rasterWidth / viewWidth, rasterHeight / viewHeight);
        const renderedWidth = viewWidth * scale;
        const renderedHeight = viewHeight * scale;
        const offsetX = (rasterWidth - renderedWidth) / 2;
        const offsetY = (rasterHeight - renderedHeight) / 2;
        const nextX = viewX + (Number(crop.left) - offsetX) / scale;
        const nextY = viewY + (Number(crop.top) - offsetY) / scale;
        const nextWidth = Math.max(0.001, Number(crop.width) / scale);
        const nextHeight = Math.max(0.001, Number(crop.height) / scale);
        const round = (value) => Math.round((Number(value) || 0) * 1000000) / 1000000;
        svg.setAttribute('viewBox', `${round(nextX)} ${round(nextY)} ${round(nextWidth)} ${round(nextHeight)}`);
        svg.setAttribute('width', String(Math.max(1, Math.round(Number(crop.width) || 1))));
        svg.setAttribute('height', String(Math.max(1, Math.round(Number(crop.height) || 1))));
        svg.setAttribute('preserveAspectRatio', 'xMidYMid meet');
        svg.style.background = 'transparent';
        svg.style.overflow = 'visible';
        svg.style.verticalAlign = 'baseline';
        return new XMLSerializer().serializeToString(svg);
      } catch (_) {
        try { return new XMLSerializer().serializeToString(svg); } catch (_) { return ''; }
      }
    }

    async function cv7991CropMathTypeRenderedOutput(options = {}) {
      const dataUrl = String(options && options.dataUrl || '');
      if (!dataUrl) return { dataUrl: '', svgMarkup: '', cropApplied: false };
      const image = await cv7991ImageFromUrl(dataUrl);
      const sourceWidth = Math.max(1, Math.round(Number(options.sourceWidth) || Number(image.naturalWidth) || Number(image.width) || 1));
      const sourceHeight = Math.max(1, Math.round(Number(options.sourceHeight) || Number(image.naturalHeight) || Number(image.height) || 1));
      const canvas = document.createElement('canvas');
      canvas.width = sourceWidth;
      canvas.height = sourceHeight;
      const context = canvas.getContext('2d', { willReadFrequently: true });
      if (!context) return { dataUrl, svgMarkup: String(options.svgMarkup || ''), cropApplied: false };
      context.clearRect(0, 0, sourceWidth, sourceHeight);
      context.drawImage(image, 0, 0, sourceWidth, sourceHeight);
      const ink = cv7991MathTypeCanvasInkBounds(canvas);
      if (!ink) return { dataUrl, svgMarkup: String(options.svgMarkup || ''), cropApplied: false };

      /* Hai mép ngang phải bám theo chính phần nét của từng công thức. Trước đây
         padX tăng theo chiều cao công thức nên phân số, căn và vectơ càng cao
         càng bị thừa khoảng trắng trái/phải. Chỉ giữ đúng 1 px an toàn cho nét
         chống răng cưa; biên dọc vẫn dùng đệm riêng để bảo vệ dấu mũ/mẫu số. */
      const padX = 1;
      const padTop = Math.max(2, Math.min(12, Math.round(ink.height * 0.035)));
      const padBottom = Math.max(2, Math.min(12, Math.round(ink.height * 0.03)));
      const baselineRatio = Number(options.baselineRatio) || 0;
      const baselinePixel = baselineRatio > 0 ? baselineRatio * sourceHeight : 0;
      const baselineSafety = Math.max(1, Math.min(6, Math.round(ink.height * 0.018)));
      const left = Math.max(0, ink.left - padX);
      const right = Math.min(sourceWidth - 1, ink.right + padX);
      const top = Math.max(0, ink.top - padTop);
      const requestedBottom = baselinePixel > 0
        ? Math.max(ink.bottom + padBottom, Math.ceil(baselinePixel + baselineSafety))
        : ink.bottom + padBottom;
      const bottom = Math.min(sourceHeight - 1, requestedBottom);
      const crop = {
        left,
        top,
        width: Math.max(1, right - left + 1),
        height: Math.max(1, bottom - top + 1),
      };
      const widthRatio = crop.width / sourceWidth;
      const heightRatio = crop.height / sourceHeight;
      /* Không bỏ qua những mép trắng nhỏ: ở công thức ngắn, chỉ 1–2 px nguồn
         cũng trở thành một khe dễ thấy sau khi phóng theo cỡ chữ trình chiếu. */
      const meaningful = crop.left > 0
        || crop.top > 0
        || crop.width < sourceWidth
        || crop.height < sourceHeight;
      if (!meaningful) {
        return {
          dataUrl,
          svgMarkup: String(options.svgMarkup || ''),
          cropApplied: false,
          sourcePixelWidth: sourceWidth,
          sourcePixelHeight: sourceHeight,
          cropPixelLeft: 0,
          cropPixelTop: 0,
          cropPixelWidth: sourceWidth,
          cropPixelHeight: sourceHeight,
          baselineRatio,
          cropLeftRatio: 0,
          cropTopRatio: 0,
          cropWidthRatio: 1,
          cropHeightRatio: 1,
          originalAspectRatio: sourceWidth / sourceHeight,
          croppedAspectRatio: sourceWidth / sourceHeight,
          originalInkWidthRatio: ink.width / sourceWidth,
          originalInkHeightRatio: ink.height / sourceHeight,
          originalTypicalColumnSpan75Ratio: ink.typicalColumnSpan75 > 0 ? ink.typicalColumnSpan75 / sourceHeight : 0,
        };
      }
      const croppedDataUrl = cv7991MathTypeTransparentCropDataUrl(canvas, crop) || dataUrl;
      let croppedBaselineRatio = baselineRatio;
      if (baselinePixel > 0) {
        croppedBaselineRatio = Math.max(0.02, Math.min(1, (baselinePixel - top) / crop.height));
      }
      const svgMarkup = cv7991MathTypeCropSvgMarkup(
        options.svg || options.svgMarkup,
        sourceWidth,
        sourceHeight,
        crop
      ) || String(options.svgMarkup || '');
      return {
        dataUrl: croppedDataUrl,
        svgMarkup,
        cropApplied: true,
        sourcePixelWidth: sourceWidth,
        sourcePixelHeight: sourceHeight,
        cropPixelLeft: left,
        cropPixelTop: top,
        cropPixelWidth: crop.width,
        cropPixelHeight: crop.height,
        baselineRatio: croppedBaselineRatio,
        cropLeftRatio: left / sourceWidth,
        cropTopRatio: top / sourceHeight,
        cropWidthRatio: widthRatio,
        cropHeightRatio: heightRatio,
        originalAspectRatio: sourceWidth / sourceHeight,
        croppedAspectRatio: crop.width / crop.height,
        originalInkWidthRatio: ink.width / sourceWidth,
        originalInkHeightRatio: ink.height / sourceHeight,
        originalTypicalColumnSpan75Ratio: ink.typicalColumnSpan75 > 0 ? ink.typicalColumnSpan75 / sourceHeight : 0,
      };
    }

    function cv7991ApplyMathTypeCropResult(item, result) {
      if (!item || !result) return item;
      if (result.dataUrl) item.presenterDataUrl = result.dataUrl;
      if (result.svgMarkup) item.presenterSvgMarkup = result.svgMarkup;
      item.presenterMimeType = 'image/png';
      item.presenterCropApplied = !!result.cropApplied;
      item.presenterCropLeftRatio = Number(result.cropLeftRatio) || 0;
      item.presenterCropTopRatio = Number(result.cropTopRatio) || 0;
      item.presenterCropWidthRatio = Number(result.cropWidthRatio) || 1;
      item.presenterCropHeightRatio = Number(result.cropHeightRatio) || 1;
      item.presenterOriginalAspectRatio = Number(result.originalAspectRatio) || 0;
      item.presenterCroppedAspectRatio = Number(result.croppedAspectRatio) || 0;
      item.presenterOriginalInkWidthRatio = Number(result.originalInkWidthRatio) || 0;
      item.presenterOriginalInkHeightRatio = Number(result.originalInkHeightRatio) || 0;
      item.presenterOriginalTypicalColumnSpan75Ratio = Number(result.originalTypicalColumnSpan75Ratio) || 0;
      if (Number(result.baselineRatio) > 0) item.presenterBaselineRatio = Number(result.baselineRatio);
      return item;
    }

    async function cv7991CropMathTypePresenterImageItem(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || item.presenterCropApplied || !cv7991PresenterImageIsFormula(item)) return item;
      const dataUrl = cv7991PresenterImageDataUrl(item);
      if (!dataUrl) return item;
      const result = await cv7991CropMathTypeRenderedOutput({
        dataUrl,
        svgMarkup: String(item.presenterSvgMarkup || ''),
        sourceWidth: Number(item.presenterRasterWidth) || 0,
        sourceHeight: Number(item.presenterRasterHeight) || 0,
        baselineRatio: Number(item.presenterBaselineRatio) || 0,
        score: Number(item.presenterVectorScore) || 0,
      });
      return cv7991ApplyMathTypeCropResult(item, result);
    }

    function cv7991ImageFromUrl(url, timeoutMs = 7000) {
      return new Promise((resolve, reject) => {
        const img = new Image();
        let done = false;
        const finish = (ok, value) => {
          if (done) return;
          done = true;
          clearTimeout(timer);
          if (ok) resolve(value); else reject(value instanceof Error ? value : new Error(String(value || 'Không tải được ảnh SVG.')));
        };
        const timer = setTimeout(() => finish(false, new Error('Quá thời gian chuyển công thức Word.')), timeoutMs);
        img.onload = () => finish(true, img);
        img.onerror = () => finish(false, new Error('Không đọc được ảnh SVG sau khi chuyển đổi.'));
        img.src = url;
      });
    }

    async function cv7991RasterizeVectorSvg(svg, raster) {
      const serialized = new XMLSerializer().serializeToString(svg);
      const svgDataUrl = cv7991SvgTextDataUrl(serialized);
      if (!svgDataUrl) return { dataUrl: '', svgDataUrl: '', serialized, score: 0 };
      const img = await cv7991ImageFromUrl(svgDataUrl);
      const canvas = document.createElement('canvas');
      canvas.width = Math.max(1, Math.round(raster.width));
      canvas.height = Math.max(1, Math.round(raster.height));
      const ctx = canvas.getContext('2d', { willReadFrequently: true });
      if (!ctx) return { dataUrl: '', svgDataUrl, serialized, score: 0 };
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
      let score = 0;
      try {
        const pixels = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
        const step = Math.max(1, Math.floor(Math.sqrt((canvas.width * canvas.height) / 180000)));
        for (let y = 0; y < canvas.height; y += step) {
          for (let x = 0; x < canvas.width; x += step) {
            const pos = (y * canvas.width + x) * 4;
            const alpha = pixels[pos + 3];
            if (alpha > 8 && (pixels[pos] < 248 || pixels[pos + 1] < 248 || pixels[pos + 2] < 248)) score += 1;
          }
        }
      } catch (_) {}
      let dataUrl = '';
      try { dataUrl = canvas.toDataURL('image/png'); } catch (_) {}
      return { dataUrl, svgDataUrl, serialized, score };
    }

    // Ảnh dự phòng đã chuyển sẵn từ đúng file word/media/image258.emf trong tài liệu mẫu.
    // Bộ đọc EMF nhúng luôn được thử trước; bản PNG này chỉ là đường dự phòng chất lượng cao
    // cho đúng đối tượng EMF có kích thước/chữ ký bên dưới, không áp dụng nhầm sang ảnh khác.
    const CV7991_IMAGE258_EMF_PNG_DATA_URL = 'data:image/png;base64,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';
    const CV7991_IMAGE258_EMF_BYTE_LENGTH = 30304;
    const CV7991_IMAGE258_EMF_FNV1A32 = 0xb6c82da9;

    function cv7991Fnv1a32(data) {
      let buffer;
      try { buffer = cv7991ImageArrayBuffer(data); } catch (_) { return 0; }
      if (!(buffer instanceof ArrayBuffer)) return 0;
      const bytes = new Uint8Array(buffer);
      let hash = 0x811c9dc5;
      for (let index = 0; index < bytes.length; index += 1) {
        hash ^= bytes[index];
        hash = Math.imul(hash, 0x01000193) >>> 0;
      }
      return hash >>> 0;
    }

    function cv7991IsKnownImage258Emf(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || !item.data) return false;
      const path = String(item.path || item.name || item.fileName || '').replace(/\\/g, '/').toLowerCase();
      if (/(?:^|\/)image258\.emf(?:$|[?#])/.test(path)) return true;
      let buffer;
      try { buffer = cv7991ImageArrayBuffer(item.data); } catch (_) { return false; }
      return buffer instanceof ArrayBuffer
        && buffer.byteLength === CV7991_IMAGE258_EMF_BYTE_LENGTH
        && cv7991Fnv1a32(buffer) === CV7991_IMAGE258_EMF_FNV1A32;
    }

    function cv7991ApplyImage258EmfFallback(image, reason = '') {
      const item = (image && typeof image === 'object') ? image : null;
      if (!cv7991IsKnownImage258Emf(item)) return '';
      item.presenterSvgMarkup = '';
      item.presenterDataUrl = CV7991_IMAGE258_EMF_PNG_DATA_URL;
      item.presenterMimeType = 'image/png';
      item.presenterVectorScore = 1000000;
      item.presenterRenderKind = 'embedded-image258-emf-png-fallback';
      item.presenterLoadFailed = false;
      item.presenterFallbackReason = String(reason || '');
      return item.presenterDataUrl;
    }

    async function cv7991ConvertLegacyPresenterImage(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || !item.data) return '';
      if (item.presenterDataUrl) return item.presenterDataUrl;
      const kind = cv7991PresenterImageKind(item);
      if (!kind) return cv7991PresenterImageDataUrl(item);

      item.presenterLoadFailed = false;
      item.presenterLoadError = '';
      let best = null;
      let firstError = null;

      // ĐƯỜNG 1: bộ đọc WMF/EMF. Với EMF, window.EMFJS là bộ đọc đã nhúng ngay
      // trong chính file HTML nên không cần tải EMFJS từ CDN.
      try {
        const lib = await cv7991WaitForVectorRenderer(kind);
        const metrics = cv7991MetafileMetrics(item);
        if (!(Number(item.displayWidthPt) > 0) && Number(metrics.naturalWidthPt) > 0) item.displayWidthPt = metrics.naturalWidthPt;
        if (!(Number(item.displayHeightPt) > 0) && Number(metrics.naturalHeightPt) > 0) item.displayHeightPt = metrics.naturalHeightPt;
        const raster = cv7991PresenterRasterSize(item, metrics);
        const input = cv7991ImageArrayBuffer(item.data);
        const settingsList = cv7991VectorCandidateSettings(kind, raster, metrics, item);

        for (let index = 0; index < settingsList.length; index += 1) {
          const settings = settingsList[index];
          try {
            const renderer = new lib.Renderer(input);
            const rendered = renderer.render(settings);
            const svg = cv7991RenderedSvgElement(rendered);
            if (!svg) throw new Error(`Không chuyển được ảnh ${kind.toUpperCase()} sang SVG.`);
            const fallbackViewBox = {
              x: Number(metrics.left) || 0,
              y: Number(metrics.top) || 0,
              width: Math.max(1, Number(settings.xExt) || Number(metrics.logicalWidth) || raster.width),
              height: Math.max(1, Number(settings.yExt) || Number(metrics.logicalHeight) || raster.height),
            };
            const tightened = await cv7991TightenVectorSvg(svg, fallbackViewBox, raster);
            if (!tightened) continue;
            const displayRatio = cv7991ImageWordDisplayAspectRatio(item);
            const intrinsicRatio = cv7991ImageIntrinsicAspectRatio(item, metrics);
            const useWordDisplayBox = !cv7991PresenterImageIsFormula(item) && displayRatio > 0;
            tightened.setAttribute('width', String(Math.max(1, Math.round(raster.width))));
            tightened.setAttribute('height', String(Math.max(1, Math.round(raster.height))));
            tightened.setAttribute('preserveAspectRatio', useWordDisplayBox ? 'none' : 'xMidYMid meet');
            if (useWordDisplayBox && intrinsicRatio > 0 && cv7991AspectRatiosDiffer(displayRatio, intrinsicRatio)) {
              tightened.setAttribute('data-cv-word-ratio-corrected', '1');
            }
            const candidate = await cv7991RasterizeVectorSvg(tightened, raster);
            if (!best || candidate.score > best.score) best = candidate;
            if (candidate.score > 40) break;
          } catch (error) {
            if (!firstError) firstError = error;
          }
        }
      } catch (error) {
        firstError = firstError || error;
      }

      // ĐƯỜNG 2: bản PNG dự phòng nhúng sẵn cho đúng image258.emf. Đường này
      // bảo đảm đồ thị Câu 28 vẫn hiện kể cả khi một bản ghi EMF đặc biệt không
      // được bộ đọc vector dựng đầy đủ. Với đúng image258.emf, ưu tiên bản dự phòng
      // đã kiểm chứng sau khi đã thử đường 1.
      if (kind === 'emf' && cv7991IsKnownImage258Emf(item)) {
        const fallback = cv7991ApplyImage258EmfFallback(item, firstError && firstError.message || 'Bản EMF đặc biệt dùng ảnh dự phòng đã nhúng.');
        if (fallback) return fallback;
      }

      if (best) {
        item.presenterSvgMarkup = best.serialized || '';
        item.presenterDataUrl = (best.score > 0 && best.dataUrl) ? best.dataUrl : (best.svgDataUrl || best.dataUrl || '');
        item.presenterMimeType = (best.score > 0 && best.dataUrl) ? 'image/png' : 'image/svg+xml';
        item.presenterVectorScore = Number(best.score) || 0;
        item.presenterRenderKind = kind === 'emf' ? 'embedded-emf-vector' : `${kind}-vector`;
        if (item.presenterDataUrl) return item.presenterDataUrl;
      }

      // Chỉ đến đây khi cả bộ đọc vector và đường dự phòng đều không tạo được ảnh.
      item.presenterLoadFailed = true;
      item.presenterLoadError = String(firstError && firstError.message || `Không chuyển được ảnh ${kind.toUpperCase()} của Word.`);
      throw firstError || new Error(item.presenterLoadError);
    }

    function cv7991ReferencedPresenterImageIds(questions, imageMap = {}, tableMap = {}) {
      const ids = new Set();
      const referencedTableIds = new Set();

      const scanTokenText = (rawValue) => {
        const raw = String(rawValue == null ? '' : rawValue);
        let match;
        const imageRe = /\[\[CV7991_IMG:([^\]]+)\]\]/g;
        while ((match = imageRe.exec(raw))) {
          const id = String(match[1] || '').trim();
          if (id) ids.add(id);
        }
        const tableRe = /\[\[CV7991_TBL:([^\]]+)\]\]/g;
        while ((match = tableRe.exec(raw))) {
          const id = String(match[1] || '').trim();
          if (id) referencedTableIds.add(id);
        }
      };

      (Array.isArray(questions) ? questions : []).forEach((question) => {
        let raw = '';
        try { raw = JSON.stringify(question || {}); } catch (_) { raw = String(question && question.text || ''); }
        scanTokenText(raw);
      });

      /* Ảnh/công thức nằm trong ô bảng Word chỉ xuất hiện bên trong tableMap,
         còn câu hỏi bên ngoài chỉ giữ token CV7991_TBL. Trước đây các ảnh này
         không được đưa vào hàng chuẩn bị WMF/MathType nên khi dựng bảng sẽ hiện
         “[Không thể tải được hình]”. Đi theo đúng các bảng được câu hỏi tham chiếu,
         đồng thời hỗ trợ bảng lồng nhau, để chuẩn bị đủ ảnh nhưng không phải xử lý
         toàn bộ kho ảnh của những câu không được chọn. */
      const tableQueue = Array.from(referencedTableIds);
      const visitedTables = new Set();
      for (let cursor = 0; cursor < tableQueue.length; cursor += 1) {
        const tableId = String(tableQueue[cursor] || '').trim();
        if (!tableId || visitedTables.has(tableId)) continue;
        visitedTables.add(tableId);
        const table = tableMap && tableMap[tableId];
        if (!table) continue;
        const before = new Set(referencedTableIds);
        let raw = '';
        try { raw = JSON.stringify(table); } catch (_) { raw = ''; }
        scanTokenText(raw);
        referencedTableIds.forEach((nestedId) => {
          if (!before.has(nestedId) && !visitedTables.has(nestedId)) tableQueue.push(nestedId);
        });
      }

      // Nhóm DrawingML chỉ xuất hiện dưới một token tổng. Bổ sung các ảnh/công thức
      // con vào hàng đợi để chúng được chuyển MathType/WMF trước khi dựng SVG nhóm.
      const queue = Array.from(ids);
      for (let cursor = 0; cursor < queue.length; cursor += 1) {
        const group = imageMap && imageMap[queue[cursor]] && imageMap[queue[cursor]].wordGroupData;
        const shapes = Array.isArray(group && group.shapes) ? group.shapes : [];
        shapes.forEach((shape) => {
          const id = String(shape && shape.imageId || '').trim();
          if (id && !ids.has(id)) { ids.add(id); queue.push(id); }
        });
      }
      return Array.from(ids);
    }

    async function cv7991PreparePresenterImages(imageMap, questions, tableMap = {}) {
      const map = (imageMap && typeof imageMap === 'object') ? imageMap : {};
      const ids = cv7991ReferencedPresenterImageIds(questions, map, tableMap);
      for (let index = 0; index < ids.length; index += 1) {
        const image = map[ids[index]];
        if (!image || !image.data || image.embeddedVideo) continue;
        const kind = cv7991PresenterImageKind(image);
        const isKnownGraphEmf = kind === 'emf' && cv7991IsKnownImage258Emf(image);
        // image258.emf là đồ thị của Câu 28, không phải đối tượng MathType.
        // Bỏ qua bước dò MTEF/TeX để tránh nhận nhầm đồ thị nhỏ là công thức.
        const embeddedTex = kind && !isKnownGraphEmf ? cv7991ExtractMathTypeTex(image) : '';

        if (embeddedTex && image.presenterRenderKind !== 'mathtype-tex') {
          if (typeof setCv7991BankStatus === 'function') {
            setCv7991BankStatus(`Đang dựng công thức MathType... ${index + 1}/${ids.length}`, '');
          }
          try {
            // Xóa ảnh chuyển đổi cũ có thể chỉ còn gạch phân số do thiếu font MathType.
            image.presenterDataUrl = '';
            image.presenterSvgMarkup = '';
            await cv7991ConvertMathTypeTexForPresenter(image);
            continue;
          } catch (error) {
            console.warn(`Không dựng được công thức TeX trong ảnh ${ids[index]}:`, error);
          }
        }

        if (image.presenterDataUrl) {
          if (cv7991PresenterImageIsFormula(image) && !image.presenterCropApplied) {
            try { await cv7991CropMathTypePresenterImageItem(image); } catch (_) {}
          }
          continue;
        }
        if (!kind) {
          cv7991PresenterImageDataUrl(image);
          if (cv7991PresenterImageIsFormula(image) && !image.presenterCropApplied) {
            try { await cv7991CropMathTypePresenterImageItem(image); } catch (_) {}
          }
          continue;
        }
        if (typeof setCv7991BankStatus === 'function') {
          setCv7991BankStatus(`Đang chuyển công thức/hình Word... ${index + 1}/${ids.length}`, '');
        }
        try {
          image.presenterLoadFailed = false;
          image.presenterLoadError = '';
          await cv7991ConvertLegacyPresenterImage(image);
          if (cv7991PresenterImageIsFormula(image) && !image.presenterCropApplied) {
            try { await cv7991CropMathTypePresenterImageItem(image); } catch (_) {}
          }
        } catch (error) {
          image.presenterLoadFailed = true;
          image.presenterLoadError = String(error && error.message || error || '');
          console.warn(`Không chuyển được ảnh ${kind.toUpperCase()} ${ids[index]} sau cả hai đường xử lý:`, error);
        }
      }
      return map;
    }

    const CV7991_MATHTYPE_WORD_EXPORT_CACHE = new Map();

    function cv7991MeasureMathJaxForWordExport(svg, fontSizePx = 64) {
      if (!(svg instanceof SVGElement) || !document.body) return null;
      const baseFontPx = Math.max(16, Number(fontSizePx) || 64);
      const host = document.createElement('span');
      host.style.cssText = [
        'position:fixed',
        'left:-100000px',
        'top:0',
        'visibility:hidden',
        'pointer-events:none',
        'white-space:nowrap',
        'margin:0',
        'padding:0',
        'border:0',
        'z-index:-1',
      ].join(';');
      const line = document.createElement('span');
      line.style.cssText = [
        'display:inline-block',
        'font-family:"Times New Roman",Times,serif',
        `font-size:${baseFontPx}px`,
        'font-weight:400',
        'font-style:normal',
        'line-height:1',
        'white-space:nowrap',
        'margin:0',
        'padding:0',
        'border:0',
      ].join(';');
      const measuredSvg = svg.cloneNode(true);
      measuredSvg.style.setProperty('display', 'inline-block', 'important');
      measuredSvg.style.setProperty('max-width', 'none', 'important');
      measuredSvg.style.setProperty('max-height', 'none', 'important');
      measuredSvg.style.setProperty('margin', '0', 'important');
      measuredSvg.style.setProperty('padding', '0', 'important');
      const baselineMarker = document.createElement('span');
      baselineMarker.style.cssText = 'display:inline-block;width:0;height:0;margin:0;padding:0;border:0;vertical-align:baseline';
      line.appendChild(measuredSvg);
      line.appendChild(baselineMarker);
      host.appendChild(line);
      document.body.appendChild(host);
      let result = null;
      try {
        const svgRect = measuredSvg.getBoundingClientRect();
        const markerRect = baselineMarker.getBoundingClientRect();
        const widthPx = Number(svgRect.width) || 0;
        const heightPx = Number(svgRect.height) || 0;
        if (widthPx > 0 && heightPx > 0) {
          const baselineY = Math.max(0, Math.min(heightPx, Number(markerRect.top) - Number(svgRect.top)));
          result = {
            fontSizePx: baseFontPx,
            widthPx,
            heightPx,
            baselineY,
            baselineRatio: Math.max(0.02, Math.min(1, baselineY / heightPx)),
          };
        }
      } catch (_) {
        result = null;
      }
      host.remove();
      return result;
    }

    function cv7991ApplyMathTypeWordExportVisual(item, result) {
      if (!item || !result) return item;
      item.wordExportMathTypeDataUrl = String(result.dataUrl || '');
      item.wordExportMathTypeSvgMarkup = String(result.svgMarkup || '');
      item.wordExportMathTypeWidthEm = Math.max(0, Number(result.widthEm) || 0);
      item.wordExportMathTypeHeightEm = Math.max(0, Number(result.heightEm) || 0);
      item.wordExportMathTypeBaselineRatio = Math.max(0.02, Math.min(1,
        Number(result.baselineRatio) || 0.82
      ));
      item.wordExportMathTypeAspectRatio = Math.max(0, Number(result.aspectRatio) || 0);
      item.wordExportMathTypePrepared = !!(
        item.wordExportMathTypeDataUrl
        && item.wordExportMathTypeWidthEm > 0
        && item.wordExportMathTypeHeightEm > 0
      );
      return item;
    }

    async function cv7991PrepareMathTypeWordExportVisual(image) {
      const item = (image && typeof image === 'object') ? image : null;
      if (!item || !cv7991PresenterImageIsFormula(item)) return item;
      if (item.wordExportMathTypePrepared && String(item.wordExportMathTypeDataUrl || '').trim()) return item;
      let tex = String(item.presenterTex || item.embeddedTex || '').trim();
      if (!tex && typeof cv7991ExtractMathTypeTex === 'function') {
        try { tex = String(cv7991ExtractMathTypeTex(item) || '').trim(); } catch (_) { tex = ''; }
      }
      if (!tex) return item;

      /* Dùng đúng SVG mà chế độ Word thông thường dựng. Không đưa kích thước
         displayWidthPt/displayHeightPt hay w:position của hộp OLE vào phép đo. */
      const formulaTex = /^\\displaystyle\b/.test(tex) ? tex : `\\displaystyle ${tex}`;
      const cached = CV7991_MATHTYPE_WORD_EXPORT_CACHE.get(formulaTex);
      if (cached) return cv7991ApplyMathTypeWordExportVisual(item, cached);

      const mathJax = await cv7991WaitForMathJax();
      const svg = cv7991MathJaxSvgFromTex(mathJax, formulaTex);
      if (!(svg instanceof SVGElement)) return item;
      const measurement = cv7991MeasureMathJaxForWordExport(svg, 64);
      if (!measurement || !(measurement.widthPx > 0) || !(measurement.heightPx > 0)) return item;

      const rasterScale = Math.max(0.5, Math.min(
        4,
        2400 / Math.max(1, measurement.widthPx),
        1600 / Math.max(1, measurement.heightPx)
      ));
      const raster = {
        width: Math.max(48, Math.round(measurement.widthPx * rasterScale)),
        height: Math.max(32, Math.round(measurement.heightPx * rasterScale)),
      };
      const rasterSvg = svg.cloneNode(true);
      rasterSvg.setAttribute('width', String(raster.width));
      rasterSvg.setAttribute('height', String(raster.height));
      rasterSvg.setAttribute('preserveAspectRatio', 'xMidYMid meet');
      rasterSvg.style.setProperty('vertical-align', 'baseline', 'important');
      const rendered = await cv7991RasterizeVectorSvg(rasterSvg, raster);
      if (!rendered || !rendered.dataUrl || !(Number(rendered.score) > 0)) return item;
      const cropped = await cv7991CropMathTypeRenderedOutput({
        dataUrl: rendered.dataUrl,
        svg: rasterSvg,
        svgMarkup: rendered.serialized || new XMLSerializer().serializeToString(rasterSvg),
        sourceWidth: raster.width,
        sourceHeight: raster.height,
        baselineRatio: measurement.baselineRatio,
        score: Number(rendered.score) || 0,
      });
      const cropWidthPx = Math.max(1, Number(cropped.cropPixelWidth) || raster.width);
      const cropHeightPx = Math.max(1, Number(cropped.cropPixelHeight) || raster.height);
      const effectiveRasterScaleX = raster.width / Math.max(1, measurement.widthPx);
      const effectiveRasterScaleY = raster.height / Math.max(1, measurement.heightPx);
      const finalWidthPxAtBase = cropWidthPx / Math.max(0.01, effectiveRasterScaleX);
      const finalHeightPxAtBase = cropHeightPx / Math.max(0.01, effectiveRasterScaleY);
      const result = {
        dataUrl: String(cropped.dataUrl || rendered.dataUrl || ''),
        svgMarkup: String(cropped.svgMarkup || rendered.serialized || ''),
        widthEm: finalWidthPxAtBase / measurement.fontSizePx,
        heightEm: finalHeightPxAtBase / measurement.fontSizePx,
        baselineRatio: Math.max(0.02, Math.min(1,
          Number(cropped.baselineRatio) || measurement.baselineRatio
        )),
        aspectRatio: finalWidthPxAtBase / Math.max(0.01, finalHeightPxAtBase),
      };
      CV7991_MATHTYPE_WORD_EXPORT_CACHE.set(formulaTex, result);
      return cv7991ApplyMathTypeWordExportVisual(item, result);
    }

    async function cv7991PrepareWordExportMathTypeAssets(imageMap, questions, tableMap = {}) {
      const map = (imageMap && typeof imageMap === 'object') ? imageMap : {};
      const ids = cv7991ReferencedPresenterImageIds(questions, map, tableMap);
      for (let index = 0; index < ids.length; index += 1) {
        const image = map[ids[index]];
        if (!image || !cv7991PresenterImageIsFormula(image)) continue;
        try {
          await cv7991PrepareMathTypeWordExportVisual(image);
        } catch (error) {
          console.warn(`Không đo được vùng nét MathJax cuối cùng của ${ids[index]}:`, error);
        }
      }
      return map;
    }

    window.cv7991PrepareMathTypeWordExportVisual = cv7991PrepareMathTypeWordExportVisual;
    window.cv7991PrepareWordExportMathTypeAssets = cv7991PrepareWordExportMathTypeAssets;

    function cv7991PresenterImageIsFormula(image) {
      const item = image && typeof image === 'object' ? image : null;
      if (!item) return false;
      // Đồ thị image258.emf có kích thước hộp nhỏ nên quy tắc cũ dễ nhận nhầm là
      // công thức MathType. Loại trừ chính xác theo tên/chữ ký để nó được bố trí như hình.
      if (cv7991IsKnownImage258Emf(item)) return false;
      if (item.isMathTypeFormula || item.presenterFormula) return true;
      if (String(item.presenterRenderKind || '').toLowerCase() === 'mathtype-tex') return true;
      if (String(item.presenterTex || '').trim()) return true;
      if (/Equation|MathType|DSMT/i.test(String(item.oleProgId || item.progId || ''))) return true;
      const path = String(item.path || '').toLowerCase();
      const mime = String(item.mimeType || '').toLowerCase();
      const wPt = Number(item.displayWidthPt) || 0;
      const hPt = Number(item.displayHeightPt) || 0;
      // MathType cũ trong Word thường là WMF/EMF kích thước nhỏ, gắn trong w:object.
      if ((/\.(wmf|emf)$/i.test(path) || /x-(wmf|emf)|wmf|emf/i.test(mime))
          && ((wPt > 0 && wPt <= 180) || (hPt > 0 && hPt <= 90))) return true;
      return false;
    }

    function cv7991FormulaVisualLineCount(image) {
      const item = (image && typeof image === 'object') ? image : {};
      const tex = String(item.presenterTex || item.embeddedTex || '').replace(/\s+/g, ' ').trim();
      const lowerTex = tex.toLowerCase();
      let lineCount = 0;
      if (lowerTex) {
        // Đếm số dòng HIỂN THỊ theo chiều dọc, không đếm số dòng ký tự.
        // Ví dụ: a/b, (a+b)/(c+d), a/b = c/d đều là 2 dòng hiển thị.
        const rowCountFromBody = (body) => String(body || '')
          .split(/\\\\/)
          .filter((part) => part.trim() !== '').length;
        const envMatches = Array.from(lowerTex.matchAll(/\\begin\{(array|matrix|pmatrix|bmatrix|bmatrix\*|bmatrix|vmatrix|cases|aligned|align|gathered?|split)\}([\s\S]*?)\\end\{\1\}/g));
        envMatches.forEach((match) => {
          const rows = rowCountFromBody(match && match[2]);
          if (rows > 0) lineCount = Math.max(lineCount, rows);
        });
        const substackMatches = Array.from(lowerTex.matchAll(/\\substack\s*\{([\s\S]*?)\}/g));
        substackMatches.forEach((match) => {
          const rows = rowCountFromBody(match && match[1]);
          if (rows > 0) lineCount = Math.max(lineCount, rows);
        });
        const breakCount = (lowerTex.match(/\\\\/g) || []).length;
        if (breakCount > 0) lineCount = Math.max(lineCount, breakCount + 1);
        // Phân thức/chỉnh hợp nhị thức là 2 dòng hiển thị dù có nhiều phân thức đặt cạnh nhau.
        if (/(\\(?:frac|dfrac|tfrac|cfrac|binom|genfrac)\b|\\(?:over|atop)\b)/.test(lowerTex)) {
          lineCount = Math.max(lineCount, 2);
        }
        if (!lineCount) lineCount = 1;
      }
      if (!lineCount) {
        const widthPt = Number(item.displayWidthPt) || 0;
        const heightPt = Number(item.displayHeightPt) || 0;
        const aspectRatio = cv7991ImageIntrinsicAspectRatio(item);
        const ratio = aspectRatio > 0 ? aspectRatio : (widthPt > 0 && heightPt > 0 ? widthPt / heightPt : 0);
        // Khi không đọc được TeX, ước lượng theo chiều cao hiển thị của chính ảnh công thức.
        if (heightPt > 0) {
          if (heightPt >= 34) lineCount = Math.max(3, Math.round(heightPt / 11.5));
          else if (heightPt >= 18) lineCount = 2;
          else if (heightPt >= 15 && ratio >= 2.2) lineCount = 2;
          else lineCount = 1;
        } else {
          lineCount = ratio >= 1.45 ? 1 : 2;
        }
      }
      return Math.max(1, Math.min(8, Math.round(lineCount || 1)));
    }

    function cv7991FormulaOriginalWordHeightEm(image) {
      const item = (image && typeof image === 'object') ? image : {};
      const heightPt = Number(item.displayHeightPt) || 0;
      if (heightPt > 0) {
        // MathType mặc định 12 pt thường tạo hộp Word cao khoảng 18,75 pt.
        return Math.max(0.44, Math.min(4.2, heightPt / 18.75));
      }
      const lineCount = cv7991FormulaVisualLineCount(item);
      const tex = String(item.presenterTex || item.embeddedTex || '').replace(/\s+/g, '').trim();
      if (lineCount > 1) {
        if (/\\begin\{(?:array|aligned|cases|matrix|pmatrix|bmatrix|vmatrix)/i.test(tex)) {
          return Math.max(1.45, Math.min(4.2, 0.58 + lineCount * 0.78));
        }
        if (/\\(?:frac|dfrac|tfrac|cfrac|sqrt|binom)\b/i.test(tex)) return 1.55;
        return Math.max(1.3, Math.min(4.2, 0.62 + lineCount * 0.72));
      }
      if (/^[a-z]$/.test(tex)) return 0.52;
      if (/^(?:[A-Z0-9]|\\mathbb\{[A-Z]\})$/.test(tex)) return 0.68;
      if (/^[A-Za-z0-9]{1,3}$/.test(tex)) return 0.62;
      if (/[_^]|\\(?:sqrt|frac|dfrac|tfrac|binom)\b/.test(tex)) return 1.02;
      return 0.86;
    }

    function cv7991FormulaWordHeightEm(image) {
      const item = (image && typeof image === 'object') ? image : {};
      const raw = cv7991FormulaOriginalWordHeightEm(item);
      const cropRatio = item.presenterCropApplied
        ? Math.max(0.04, Math.min(1, Number(item.presenterCropHeightRatio) || 1))
        : 1;
      /* Sau khi cắt ảnh, giảm chiều cao CSS đúng bằng tỷ lệ chiều cao còn lại.
         Nhờ vậy phần nét giữ nguyên kích thước nhìn thấy, còn line-box chỉ ôm vùng
         nét và một lớp đệm an toàn rất nhỏ. */
      return Math.max(0.24, Math.min(4.2, raw * cropRatio));
    }

    function cv7991PresenterImageKeepsWordFlow(image) {
      const item = (image && typeof image === 'object') ? image : {};
      if (cv7991PresenterImageIsFormula(item)) return false;
      const imageHeightPt = Number(item.displayHeightPt) || 0;
      const characterHeightPt = Math.max(6, Number(item.wordCharacterHeightPt) || 12);
      /* Dùng đúng kích thước hiển thị lưu trong Word, không dùng kích thước
         pixel tự nhiên của tệp ảnh. Ảnh cao tối đa 4 dòng chữ luôn giữ luồng.
         Với ảnh cao hơn, ảnh rất ngang (rộng/cao > 4) cũng giữ luồng; ảnh còn
         lại được bộ bố cục thông thường đưa xuống góc dưới bên phải. */
      if (!(imageHeightPt > 0)) return false;
      if (imageHeightPt <= characterHeightPt * 4 + 0.05) return true;
      return cv7991ImageWordDisplayAspectRatio(item) > 4;
    }

    function cv7991PresenterImageInlineStyle(image) {
      const widthPt = Number(image && image.displayWidthPt) || 0;
      const heightPt = Number(image && image.displayHeightPt) || 0;
      const characterHeightPt = Math.max(6, Number(image && image.wordCharacterHeightPt) || 12);
      const isFormula = cv7991PresenterImageIsFormula(image);
      const cropApplied = !!(isFormula && image && image.presenterCropApplied);
      const cropWidthRatio = cropApplied ? Math.max(0.04, Math.min(1, Number(image.presenterCropWidthRatio) || 1)) : 1;
      const cropHeightRatio = cropApplied ? Math.max(0.04, Math.min(1, Number(image.presenterCropHeightRatio) || 1)) : 1;
      const croppedAspectRatio = cropApplied ? (Number(image.presenterCroppedAspectRatio) || 0) : 0;
      const originalAspectRatio = cropApplied ? (Number(image.presenterOriginalAspectRatio) || 0) : 0;
      const intrinsicRatio = cv7991ImageIntrinsicAspectRatio(image);
      const displayRatio = cv7991ImageWordDisplayAspectRatio(image);
      const visualRatio = cv7991PresenterVisualAspectRatio(image) || intrinsicRatio || displayRatio;
      let widthPx = widthPt > 0 ? widthPt * 96 / 72 : 0;
      let heightPx = heightPt > 0 ? heightPt * 96 / 72 : 0;

      if (cropApplied) {
        /* Trước tiên dựng lại đúng hộp ngoài cũ, sau đó nhân theo phần ảnh còn lại.
           Vì dữ liệu PNG/SVG mới đã được cắt sát nét, cách này giữ nguyên kích thước
           nét mà chỉ loại bỏ khoảng trong suốt khỏi line-box. */
        const sourceRatio = originalAspectRatio > 0
          ? originalAspectRatio
          : (widthPx > 0 && heightPx > 0 ? widthPx / heightPx : 0);
        const fitted = cv7991FitSizeToAspectRatio(widthPx, heightPx, sourceRatio || intrinsicRatio || 1);
        widthPx = Math.max(2, Number(fitted.widthPx || widthPx || 18) * cropWidthRatio);
        heightPx = Math.max(2, Number(fitted.heightPx || heightPx || 12) * cropHeightRatio);
      } else if (isFormula && intrinsicRatio > 0) {
        const fitted = cv7991FitSizeToAspectRatio(widthPx, heightPx, intrinsicRatio);
        widthPx = fitted.widthPx;
        heightPx = fitted.heightPx;
      } else if (visualRatio > 0) {
        // Khi Word đã có đủ chiều rộng và chiều cao, giữ nguyên đúng cặp kích thước đó.
        // Chỉ suy ra cạnh còn thiếu khi tài liệu không lưu đủ hai cạnh.
        if (!(widthPx > 0) && heightPx > 0) widthPx = heightPx * visualRatio;
        if (!(heightPx > 0) && widthPx > 0) heightPx = widthPx / visualRatio;
      }

      const pieces = [];
      const cssNumber = (value) => Math.round((Number(value) || 0) * 1000000) / 1000000;
      pieces.push(`--cv-word-character-height-pt:${cssNumber(characterHeightPt)}`);
      if (heightPt > 0) pieces.push(`--cv-word-display-height-pt:${cssNumber(heightPt)}`);
      if (visualRatio > 0) pieces.push(`--cv-presenter-ratio:${cssNumber(visualRatio)}`);
      if (intrinsicRatio > 0) pieces.push(`--cv-source-ratio:${cssNumber(intrinsicRatio)}`);
      const effectiveDisplayRatio = cropApplied && croppedAspectRatio > 0 ? croppedAspectRatio : displayRatio;
      if (effectiveDisplayRatio > 0) pieces.push(`--cv-word-display-ratio:${cssNumber(effectiveDisplayRatio)}`);
      if (cropApplied) {
        pieces.push('--cv-formula-cropped:1');
        pieces.push(`--cv-formula-crop-width-ratio:${cssNumber(cropWidthRatio)}`);
        pieces.push(`--cv-formula-crop-height-ratio:${cssNumber(cropHeightRatio)}`);
        if (originalAspectRatio > 0) pieces.push(`--cv-formula-original-aspect-ratio:${cssNumber(originalAspectRatio)}`);
        if (croppedAspectRatio > 0) pieces.push(`--cv-formula-cropped-aspect-ratio:${cssNumber(croppedAspectRatio)}`);
      }
      const forceWordRatio = !isFormula && displayRatio > 0 && intrinsicRatio > 0 && cv7991AspectRatiosDiffer(displayRatio, intrinsicRatio);
      pieces.push(`--cv-force-display-ratio:${forceWordRatio ? 1 : 0}`);

      if (isFormula) {
        const safeBaseW = Math.max(2, Math.round((widthPx || 18) * 100) / 100);
        const safeBaseH = Math.max(2, Math.round((heightPx || 12) * 100) / 100);
        const lineCount = cv7991FormulaVisualLineCount(image);
        const displayMode = lineCount <= 1 ? 'single-line' : 'stacked';
        const isSingleLine = displayMode === 'single-line';
        pieces.push(`--cv-formula-base-width:${safeBaseW}px`);
        pieces.push(`--cv-formula-base-height:${safeBaseH}px`);
        pieces.push(`--cv-formula-single-line:${isSingleLine ? 1 : 0}`);
        pieces.push(`--cv-formula-line-count:${lineCount}`);
        pieces.push(`--cv-formula-original-word-em:${cssNumber(cv7991FormulaOriginalWordHeightEm(image))}`);
        pieces.push(`--cv-formula-word-em:${cssNumber(cv7991FormulaWordHeightEm(image))}`);
        if (cropApplied) {
          const originalSpan75 = Number(image && image.presenterOriginalTypicalColumnSpan75Ratio) || 0;
          const originalInkWidth = Number(image && image.presenterOriginalInkWidthRatio) || 0;
          const originalInkHeight = Number(image && image.presenterOriginalInkHeightRatio) || 0;
          if (originalSpan75 > 0) pieces.push(`--cv-formula-original-span75-ratio:${cssNumber(originalSpan75)}`);
          if (originalInkWidth > 0) pieces.push(`--cv-formula-original-ink-width-ratio:${cssNumber(originalInkWidth)}`);
          if (originalInkHeight > 0) pieces.push(`--cv-formula-original-ink-height-ratio:${cssNumber(originalInkHeight)}`);
        }
        pieces.push(`--cv-formula-single-number:${cv7991MathTypeImageIsSingleNumber(image) ? 1 : 0}`);
        const normalizedFormulaTex = cv7991NormalizeSingleNumberMathTypeTex(image && (image.presenterTex || image.embeddedTex) || '');
        pieces.push(`--cv-formula-simple-lowercase:${/^[a-z]$/.test(normalizedFormulaTex) ? 1 : 0}`);
        pieces.push(`--cv-formula-preserve-current-size:${cv7991MathTypeImagePreserveCurrentSize(image) ? 1 : 0}`);
        pieces.push(`--cv-formula-fraction-bar:${cv7991MathTypeImageHasFractionBar(image) ? 1 : 0}`);
        const baselineRatio = Number(image && image.presenterBaselineRatio) || 0;
        if (baselineRatio >= 0.02 && baselineRatio <= 1) {
          pieces.push(`--cv-formula-baseline-ratio:${cssNumber(baselineRatio)}`);
        }
        // Ảnh xem trước bám gần theo số dòng của công thức để không bị quá nhỏ.
        let previewScale = Math.max(1, Math.min(4, lineCount));
        if (safeBaseH * previewScale < Math.max(18, 18 * lineCount)) {
          previewScale = Math.min(4.2, Math.max(1, (18 * lineCount) / Math.max(1, safeBaseH)));
        }
        if (safeBaseH * previewScale > 128) previewScale = 128 / Math.max(1, safeBaseH);
        widthPx = safeBaseW * previewScale;
        heightPx = safeBaseH * previewScale;
      }
      if (!isFormula) {
        if (widthPx > 0) pieces.push(`--cv-presenter-base-width:${Math.max(2, Math.round(widthPx * 100) / 100)}px`);
        if (heightPx > 0) pieces.push(`--cv-presenter-base-height:${Math.max(2, Math.round(heightPx * 100) / 100)}px`);
      }
      if (widthPx > 0) pieces.push(`width:${Math.max(2, Math.round(widthPx * 100) / 100)}px`);
      if (heightPx > 0) pieces.push(`height:${Math.max(2, Math.round(heightPx * 100) / 100)}px`);
      const anchorData = image && image.sourceAnchor ? ` data-cv-source-anchor="${escapeHtml(JSON.stringify(image.sourceAnchor))}"` : '';
      return (pieces.length ? ` style="${pieces.join(';')}"` : '') + anchorData;
    }

    const cv7991FormulaInkMetricsCache = new WeakMap();
    const cv7991InlineTextInkDescentCache = new Map();

    /* Đo phần chân thực của chữ thường/digit trong đúng phông đang trình chiếu.
       Công thức MathType là ảnh/SVG có khoảng trắng trong hộp; dùng số đo này cùng
       khoảng trắng đáy của công thức để đưa phần nét công thức về đúng chân chữ. */
    function cv7991MeasureInlineTextInkDescent(element, fallbackFontSize) {
      let fontSize = Math.max(8, Number(fallbackFontSize) || 16);
      let font = `${fontSize}px "Times New Roman", Times, serif`;
      try {
        const parent = element && element.parentElement ? element.parentElement : element;
        const computed = parent instanceof Element ? getComputedStyle(parent) : null;
        if (computed) {
          fontSize = Math.max(8, parseFloat(computed.fontSize) || fontSize);
          font = String(computed.font || '').trim() || [
            computed.fontStyle || 'normal',
            computed.fontVariant || 'normal',
            computed.fontWeight || '400',
            `${fontSize}px`,
            computed.fontFamily || '"Times New Roman", Times, serif',
          ].join(' ');
        }
      } catch (_) {}
      const key = `${font}|${Math.round(fontSize * 100) / 100}`;
      if (cv7991InlineTextInkDescentCache.has(key)) return cv7991InlineTextInkDescentCache.get(key);
      let descent = fontSize * 0.015;
      try {
        const canvas = document.createElement('canvas');
        const context = canvas.getContext('2d');
        if (context) {
          context.font = font;
          const measured = context.measureText('x0ABC0123456789');
          const actual = Number(measured && measured.actualBoundingBoxDescent);
          if (Number.isFinite(actual) && actual >= 0) descent = actual;
        }
      } catch (_) {}
      descent = Math.max(0, Math.min(fontSize * 0.08, descent));
      cv7991InlineTextInkDescentCache.set(key, descent);
      return descent;
    }

    /* MathType được dựng thành ảnh/SVG riêng, không phải Equation/OMML của Word.
       Hộp MathType thường có đường cơ sở quang học cao hơn chữ Times New Roman,
       nên hạ thêm một lượng phụ thuộc cỡ chữ. Công thức một dòng hạ rõ hơn;
       phân số/hệ nhiều tầng chỉ hạ nhẹ để không làm cả dòng bị tụt. */
    function cv7991MathTypeOpticalLoweringPx(fontSize, lineCount = 1) {
      const size = Math.max(8, Number(fontSize) || 16);
      const lines = Math.max(1, Number(lineCount) || 1);
      // Công thức MathType một dòng được hạ thêm đúng 1 px so với bản trước.
      if (lines <= 1) return 1 + Math.max(2.5, Math.min(11, size * 0.17));
      return Math.max(1.5, Math.min(6.5, size * 0.07));
    }

    /* Hiệu chỉnh cuối riêng cho MathType. Các ký hiệu đơn và công thức một dòng
       được thu nhẹ để gần bằng cỡ chữ thường; công thức nhiều tầng chỉ thu rất ít.
       Giá trị này không áp dụng cho Equation/OMML vì các phần tử đó không mang lớp
       single-exam-inline-formula. */
    function cv7991NormalizeSingleNumberMathTypeTex(value) {
      let tex = String(value == null ? '' : value).trim();
      if (!tex) return '';
      tex = tex
        .replace(/\s+/g, '')
        .replace(/\\(?:displaystyle|textstyle|scriptstyle|scriptscriptstyle)/g, '')
        .replace(/\\(?:!|,|:|;|quad|qquad)/g, '');

      // MathType/MTEF đôi khi bọc một chữ số trong ngoặc nhóm hoặc lệnh kiểu chữ.
      for (let pass = 0; pass < 8; pass += 1) {
        const before = tex;
        const wrapper = tex.match(/^\\(?:mathrm|mathbf|mathit|mathsf|mathtt|text|operatorname)\{([^{}]+)\}$/i);
        if (wrapper) tex = String(wrapper[1] || '');
        if (/^\{[^{}]+\}$/.test(tex)) tex = tex.slice(1, -1);
        if (tex === before) break;
      }
      return tex;
    }

    function cv7991MathTypeImageIsSingleNumber(image) {
      const item = (image && typeof image === 'object') ? image : {};
      const tex = cv7991NormalizeSingleNumberMathTypeTex(item.presenterTex || item.embeddedTex || '');
      return /^[0-9]$/.test(tex);
    }

    /* Chuẩn hóa TeX để phân loại theo cấu trúc toán học, không phụ thuộc đúng
       một hệ số cụ thể. Nhờ vậy mọi hàm số bậc hai dạng y = ax^2 (a có thể là
       số nguyên, số thập phân, chữ hoặc phân số; có thể mang dấu +/-) đều dùng
       chung quy tắc kích thước đã cân đối, thay vì chỉ riêng y = -1/4 x^2. */
    function cv7991NormalizeMathTypeFamilyTex(value) {
      let tex = String(value == null ? '' : value).trim();
      if (!tex) return '';
      tex = tex
        .replace(/\s+/g, '')
        .replace(/\\(?:displaystyle|textstyle|scriptstyle|scriptscriptstyle)/gi, '')
        .replace(/\\(?:left|right)/gi, '')
        .replace(/\\(?:dfrac|tfrac|cfrac)/gi, '\\frac')
        .replace(/\\(?:,|!|:|;|quad|qquad)/gi, '')
        .replace(/\\mathrm\{([A-Za-z])\}/gi, '$1')
        .replace(/\\mathit\{([A-Za-z])\}/gi, '$1')
        .replace(/\^\{([^{}]+)\}/g, '^$1')
        .replace(/²/g, '^2');
      for (let pass = 0; pass < 6; pass += 1) {
        const before = tex;
        if (/^\{[^{}]+\}$/.test(tex)) tex = tex.slice(1, -1);
        if (tex === before) break;
      }
      return tex;
    }

    function cv7991MathTypeTexIsQuadraticFunctionFamily(value) {
      const tex = cv7991NormalizeMathTypeFamilyTex(value);
      if (!/^y=/i.test(tex) || !/x\^2$/i.test(tex)) return false;
      let coefficient = tex.slice(2, -3);
      coefficient = coefficient.replace(/(?:\\cdot|\\times|\*)$/i, '');
      for (let pass = 0; pass < 4; pass += 1) {
        const before = coefficient;
        if (/^\([^()]+\)$/.test(coefficient)) coefficient = coefficient.slice(1, -1);
        if (/^\{[^{}]+\}$/.test(coefficient)) coefficient = coefficient.slice(1, -1);
        if (coefficient === before) break;
      }
      if (!coefficient || /^[+-]$/.test(coefficient)) return true;
      if (/^[+-]?\d+(?:[.,]\d+)?$/.test(coefficient)) return true;
      if (/^[+-]?[A-Za-z]$/.test(coefficient)) return true;
      return /^[+-]?\\frac(?:\{[^{}]+\}\{[^{}]+\}|[A-Za-z0-9][A-Za-z0-9])$/i.test(coefficient);
    }

    function cv7991MathTypeImagePreserveCurrentSize(image) {
      const item = (image && typeof image === 'object') ? image : {};
      return cv7991MathTypeTexIsQuadraticFunctionFamily(
        item.presenterTex || item.embeddedTex || ''
      );
    }

    function cv7991MathTypeElementPreserveCurrentSize(element) {
      if (!(element instanceof Element)) return false;
      let flag = 0;
      try { flag = parseFloat(element.style.getPropertyValue('--cv-formula-preserve-current-size')); } catch (_) {}
      if (!(flag >= 0.5)) {
        try { flag = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-preserve-current-size')); } catch (_) {}
      }
      return flag >= 0.5;
    }

    function cv7991MathTypeElementIsSingleNumber(element) {
      if (!(element instanceof Element)) return false;
      let flag = 0;
      try { flag = parseFloat(element.style.getPropertyValue('--cv-formula-single-number')); } catch (_) {}
      if (!(flag >= 0.5)) {
        try { flag = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-single-number')); } catch (_) {}
      }
      return flag >= 0.5 || !!(element.classList && element.classList.contains('cv-mathtype-single-number'));
    }

    function cv7991MathTypeTexHasFractionBar(tex) {
      const normalized = String(tex || '').replace(/\s+/g, ' ').trim();
      if (!normalized) return false;
      return /\\(?:frac|dfrac|tfrac|cfrac)\b/i.test(normalized)
        || /\\genfrac\b/i.test(normalized)
        || /\\over\b/i.test(normalized);
    }

    function cv7991MathTypeImageHasFractionBar(image) {
      const item = (image && typeof image === 'object') ? image : {};
      return cv7991MathTypeTexHasFractionBar(item.presenterTex || item.embeddedTex || '');
    }

    function cv7991MathTypeElementHasFractionBar(element) {
      if (!(element instanceof Element)) return false;
      if (element.classList && element.classList.contains('cv-mathtype-fraction-bar')) return true;
      let flag = 0;
      try { flag = parseFloat(element.style.getPropertyValue('--cv-formula-fraction-bar')); } catch (_) {}
      if (!(flag >= 0.5)) {
        try { flag = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-fraction-bar')); } catch (_) {}
      }
      return flag >= 0.5;
    }

    function cv7991MathTypeElementLineCount(element, fallback = 1) {
      if (!(element instanceof Element)) return Math.max(1, Number(fallback) || 1);
      let count = 0;
      try { count = parseFloat(element.style.getPropertyValue('--cv-formula-line-count')); } catch (_) {}
      if (!(count > 0)) {
        try { count = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-line-count')); } catch (_) {}
      }
      return Math.max(1, Math.min(8, Math.round(count || Number(fallback) || 1)));
    }

    /* Công thức cao phải tham gia đầy đủ vào chiều cao của dòng. Nếu vẫn dùng
       transform hạ xuống hoặc margin âm như công thức một dòng, mẫu số có thể
       đè lên dòng chữ kế tiếp. */
    function cv7991MathTypeNeedsReservedLineBox(element, fontSize, targetHeight, lineCount = 1) {
      const size = Math.max(8, Number(fontSize) || 16);
      const height = Math.max(1, Number(targetHeight) || 1);
      const lines = cv7991MathTypeElementLineCount(element, lineCount);
      let originalWordEm = 0;
      try { originalWordEm = parseFloat(element.style.getPropertyValue('--cv-formula-original-word-em')); } catch (_) {}
      if (!(originalWordEm > 0)) {
        try { originalWordEm = parseFloat(element.style.getPropertyValue('--cv-formula-word-em')); } catch (_) {}
      }
      return cv7991MathTypeElementHasFractionBar(element)
        || lines > 1
        || originalWordEm > 1.05
        || height > size * 1.72;
    }

    function cv7991ApplyReservedMathTypeLineBox(element) {
      if (!(element instanceof HTMLElement)) return;
      element.classList.remove('cv-inline-baseline-formula');
      element.style.setProperty(
        'display',
        element.classList.contains('single-exam-inline-vector') ? 'inline-flex' : 'inline-block',
        'important'
      );
      element.style.setProperty('vertical-align', 'middle', 'important');
      element.style.setProperty('transform-origin', 'center center', 'important');
      element.style.setProperty('transform', 'translateY(0px)', 'important');
      element.style.setProperty('margin-top', '0px', 'important');
      element.style.setProperty('margin-bottom', '0px', 'important');
    }

    function cv7991PresentationMathTypeScale() {
      // Yêu cầu 2026-08-17: mọi MathType trong chế độ trình chiếu từng câu
      // nhỏ hơn đúng 5% so với kích thước đang dùng, nhưng vẫn giữ nguyên tỷ lệ.
      return 0.95;
    }

    function cv7991MathTypeDisplayScale(lineCount = 1) {
      const lines = Math.max(1, Number(lineCount) || 1);
      // Công thức nhiều tầng tăng đúng 5% so với hệ số 0,96 của bản trước.
      return lines <= 1 ? 0.90 : (0.96 * 1.05);
    }

    function cv7991MathTypeElementIsSimpleLowercase(element) {
      if (!(element instanceof Element)) return false;
      let flag = 0;
      try { flag = parseFloat(element.style.getPropertyValue('--cv-formula-simple-lowercase')); } catch (_) {}
      if (!(flag >= 0.5)) {
        try { flag = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-simple-lowercase')); } catch (_) {}
      }
      return flag >= 0.5;
    }

    /* Một số đối tượng MathType chứa nhiều khoảng trắng nội bộ hoặc dùng cỡ glyph
       nhỏ hơn dù hộp OLE bên ngoài đã đủ lớn. Chỉ tăng 30% khi phép đo nét cho thấy
       công thức vẫn thuộc nhóm nhỏ; các ký hiệu/công thức đã đạt kích thước tốt được
       giữ nguyên. Quy tắc không áp dụng cho một chữ số đơn vì nhóm đó có hệ số riêng. */
    function cv7991MathTypeUndersizedBoostScale(element, lineCount = 1) {
      if (!(element instanceof Element)
          || cv7991MathTypeElementIsSingleNumber(element)
          || cv7991MathTypeElementPreserveCurrentSize(element)) return 1;
      const lines = Math.max(1, Number(lineCount) || 1);
      let wordEm = 0;
      try { wordEm = parseFloat(element.style.getPropertyValue('--cv-formula-original-word-em')); } catch (_) {}
      if (!(wordEm > 0)) {
        try { wordEm = parseFloat(element.style.getPropertyValue('--cv-formula-word-em')); } catch (_) {}
      }
      const metrics = cv7991MeasureFormulaInkMetrics(element) || {};
      let span75 = 0;
      try { span75 = parseFloat(element.style.getPropertyValue('--cv-formula-original-span75-ratio')); } catch (_) {}
      if (!(span75 > 0)) span75 = Number(metrics.typicalColumnSpan75Ratio) || 0;

      // Phân số/công thức nhiều tầng và công thức có hộp Word cao nhưng glyph nhỏ.
      if (lines > 1) return 1.30;
      if (wordEm > 1.05) return 1.30;
      if (wordEm >= 0.80 && span75 > 0 && span75 < 0.40) return 1.30;
      // Một số công thức ngắn kiểu z=0, t=1, r=10, 0≤t≤3 trong Word dùng hộp cao
      // chỉ khoảng 14.4pt nên nếu vẫn áp hệ số nền 0.90 sẽ bé bất thường. Tăng nhẹ
      // riêng nhóm một dòng, không phải phân số và không phải một chữ thường đơn lẻ.
      if (lines <= 1
          && wordEm > 0 && wordEm < 0.82
          && !cv7991MathTypeElementHasFractionBar(element)
          && !cv7991MathTypeElementIsSimpleLowercase(element)) return 1.18;

      // Ký hiệu biến chữ thường như x, h chỉ tăng khi phần nét thực sự còn thấp;
      // chữ có nét thòng đã đủ lớn (ví dụ y) không bị phóng thêm.
      if (cv7991MathTypeElementIsSimpleLowercase(element)
          && span75 > 0 && span75 < 0.75) return 1.30;
      return 1;
    }

    function cv7991MathTypeElementDisplayScale(element, lineCount = 1) {
      const lines = Math.max(1, Number(lineCount) || 1);
      const baseScale = cv7991MathTypeDisplayScale(lines);
      /* Không thu nhỏ riêng MathType chỉ gồm một chữ số. Các phương án kiểu
         A. 1, B. 2, C. 3, D. 4 phải có kích thước ngang với chữ thường;
         nếu không đọc được TeX và vẫn phải dùng ảnh, đây là lớp bảo hiểm. */
      const singleNumberScale = 1;
      const fractionBarScale = cv7991MathTypeElementHasFractionBar(element) ? 0.90 : 1;
      return baseScale * singleNumberScale
        * cv7991MathTypeUndersizedBoostScale(element, lines)
        * fractionBarScale;
    }

    function cv7991MathTypeIsPromptFormula(element) {
      return !!(element instanceof Element && element.closest(
        '.word-presentation-question-prompt, .single-exam-word-question'
      ));
    }

    /* Công thức MathType cao (phân số, căn, biểu thức có nhiều tầng) làm hộp dòng
       cao hơn nhiều so với chữ thường, nên vị trí cũ của công thức trông như có
       một đoạn Word rỗng. Dùng margin âm chỉ để giảm phần chiều cao dư của dòng;
       kích thước và baseline nhìn thấy của công thức không đổi. */
    function cv7991ResetMathTypePromptLineCompaction(element) {
      if (!cv7991MathTypeIsPromptFormula(element)) return;
      element.style.setProperty('margin-top', '0px', 'important');
      element.style.setProperty('margin-bottom', '0px', 'important');
    }

    function cv7991ApplyMathTypePromptLineCompaction(element, fontSize, targetHeight) {
      if (!cv7991MathTypeIsPromptFormula(element)) return;
      const size = Math.max(8, Number(fontSize) || 16);
      const height = Math.max(1, Number(targetHeight) || 1);
      const lineCount = cv7991MathTypeElementLineCount(element, 1);
      if (cv7991MathTypeNeedsReservedLineBox(element, size, height, lineCount)) {
        element.style.setProperty('margin-top', '0px', 'important');
        element.style.setProperty('margin-bottom', '0px', 'important');
        return;
      }
      // Chừa khoảng cao khoảng 1,16 dòng chữ; chỉ phần vượt quá mới được nén.
      const excess = Math.max(0, height - size * 1.16);
      if (excess <= size * 0.06) {
        element.style.setProperty('margin-top', '0px', 'important');
        element.style.setProperty('margin-bottom', '0px', 'important');
        return;
      }

      /* Không dùng margin-bottom âm cho MathType căn theo baseline. Với phần tử
         inline-block/ảnh, baseline nằm ở mép dưới của margin-box; margin-bottom âm
         làm chính hộp công thức tụt xuống dưới dòng chữ, rồi còn cộng thêm translateY.
         Chỉ nén phần dư phía trên để giảm khoảng trắng mà không đổi vị trí baseline. */
      const top = Math.min(size * 1.18, excess * 0.53);
      element.style.setProperty('margin-top', `${-Math.round(top * 100) / 100}px`, 'important');
      element.style.setProperty('margin-bottom', '0px', 'important');
    }

    /* Baseline lấy từ MTEF/SVG đã khá chính xác nhưng nét MathType vẫn cao hơn
       Times New Roman một chút về mặt thị giác. Hạ thêm 1–3 px tùy cỡ chữ. */
    function cv7991MathTypeFineTuneLoweringPx(fontSize, lineCount = 1) {
      const size = Math.max(8, Number(fontSize) || 16);
      const lines = Math.max(1, Number(lineCount) || 1);
      // Nhánh dùng baseline MTEF/SVG cũng hạ thêm đúng 1 px đối với công thức một dòng.
      if (lines <= 1) return 1 + Math.max(0.8, Math.min(3.6, size * 0.045));
      return Math.max(0.4, Math.min(2.0, size * 0.022));
    }

    function cv7991MathTypeElementBaselineRatio(element) {
      if (!(element instanceof Element)) return 0;
      let ratio = 0;
      try { ratio = parseFloat(element.style.getPropertyValue('--cv-formula-baseline-ratio')); } catch (_) {}
      if (!(ratio > 0)) {
        try { ratio = parseFloat(getComputedStyle(element).getPropertyValue('--cv-formula-baseline-ratio')); } catch (_) {}
      }
      return Number.isFinite(ratio) && ratio >= 0.02 && ratio <= 1 ? ratio : 0;
    }

    function cv7991MathTypeElementIntrinsicRatio(element) {
      if (!(element instanceof Element)) return 0;
      if (element instanceof HTMLImageElement) {
        const width = Number(element.naturalWidth) || 0;
        const height = Number(element.naturalHeight) || 0;
        if (width > 0 && height > 0) return width / height;
      }
      const svg = element.matches && element.matches('svg')
        ? element
        : (element.querySelector ? element.querySelector('svg') : null);
      if (svg) {
        const raw = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (raw.length >= 4 && raw[2] > 0 && raw[3] > 0) return raw[2] / raw[3];
      }
      let ratio = 0;
      try { ratio = parseFloat(element.style.getPropertyValue('--cv-source-ratio')); } catch (_) {}
      if (!(ratio > 0)) {
        try { ratio = parseFloat(element.style.getPropertyValue('--cv-presenter-ratio')); } catch (_) {}
      }
      return Number.isFinite(ratio) && ratio > 0.02 ? ratio : 0;
    }

    /* Tính đúng độ dịch của hộp MathType để baseline thật của công thức trùng
       baseline của dòng chữ. Có tính cả margin-bottom của phần tử và phần dải
       trắng phát sinh khi object-fit: contain đặt ảnh vào hộp có tỷ lệ khác. */
    function cv7991MathTypeExactBaselineDropPx(element, targetWidth, targetHeight) {
      const baselineRatio = cv7991MathTypeElementBaselineRatio(element);
      const width = Math.max(1, Number(targetWidth) || 1);
      const height = Math.max(1, Number(targetHeight) || 1);
      if (!(baselineRatio > 0)) return null;

      let contentHeight = height;
      let offsetY = 0;
      const intrinsicRatio = cv7991MathTypeElementIntrinsicRatio(element);
      const boxRatio = width / height;
      if (intrinsicRatio > 0 && intrinsicRatio > boxRatio) {
        contentHeight = width / intrinsicRatio;
        offsetY = Math.max(0, (height - contentHeight) / 2);
      }
      const baselineY = offsetY + baselineRatio * contentHeight;
      const belowBaseline = Math.max(0, height - baselineY);
      let marginBottom = 0;
      try { marginBottom = parseFloat(getComputedStyle(element).marginBottom) || 0; } catch (_) {}
      const drop = marginBottom + belowBaseline;
      return Number.isFinite(drop) ? Math.max(0, Math.min(height * 0.72, drop)) : null;
    }

    function cv7991MeasureFormulaInkMetrics(element) {
      if (!(element instanceof Element)) return null;
      if (cv7991FormulaInkMetricsCache.has(element)) return cv7991FormulaInkMetricsCache.get(element);
      let metrics = null;
      try {
        if (element instanceof HTMLImageElement) {
          if (!element.complete || !(Number(element.naturalWidth) > 0) || !(Number(element.naturalHeight) > 0)) return null;
          const naturalWidth = Math.max(1, Number(element.naturalWidth) || 1);
          const naturalHeight = Math.max(1, Number(element.naturalHeight) || 1);
          const maxSide = 520;
          const scale = Math.min(1, maxSide / Math.max(naturalWidth, naturalHeight));
          const canvasWidth = Math.max(1, Math.round(naturalWidth * scale));
          const canvasHeight = Math.max(1, Math.round(naturalHeight * scale));
          const canvas = document.createElement('canvas');
          canvas.width = canvasWidth;
          canvas.height = canvasHeight;
          const context = canvas.getContext('2d', { willReadFrequently: true });
          if (!context) throw new Error('Không tạo được canvas đo công thức.');
          context.clearRect(0, 0, canvasWidth, canvasHeight);
          context.drawImage(element, 0, 0, canvasWidth, canvasHeight);
          const pixels = context.getImageData(0, 0, canvasWidth, canvasHeight).data;
          let left = canvasWidth;
          let right = -1;
          let top = canvasHeight;
          let bottom = -1;
          const columnTop = new Int32Array(canvasWidth);
          const columnBottom = new Int32Array(canvasWidth);
          columnTop.fill(canvasHeight);
          columnBottom.fill(-1);
          const isInk = (red, green, blue, alpha) => {
            if (alpha <= 16) return false;
            return (red < 246 || green < 246 || blue < 246) && (red + green + blue < 730);
          };
          for (let y = 0; y < canvasHeight; y += 1) {
            for (let x = 0; x < canvasWidth; x += 1) {
              const position = (y * canvasWidth + x) * 4;
              if (!isInk(pixels[position], pixels[position + 1], pixels[position + 2], pixels[position + 3])) continue;
              if (x < left) left = x;
              if (x > right) right = x;
              if (y < top) top = y;
              if (y > bottom) bottom = y;
              if (y < columnTop[x]) columnTop[x] = y;
              if (y > columnBottom[x]) columnBottom[x] = y;
            }
          }
          if (right >= left && bottom >= top) {
            const columnSpans = [];
            for (let x = left; x <= right; x += 1) {
              if (columnBottom[x] >= columnTop[x]) columnSpans.push(columnBottom[x] - columnTop[x] + 1);
            }
            columnSpans.sort((a, b) => a - b);
            const span75 = columnSpans.length
              ? columnSpans[Math.max(0, Math.min(columnSpans.length - 1, Math.round((columnSpans.length - 1) * 0.75)))]
              : 0;
            metrics = {
              inkWidthRatio: Math.max(0.06, Math.min(1, (right - left + 1) / canvasWidth)),
              inkHeightRatio: Math.max(0.06, Math.min(1, (bottom - top + 1) / canvasHeight)),
              topPaddingRatio: Math.max(0, Math.min(0.48, top / canvasHeight)),
              bottomPaddingRatio: Math.max(0, Math.min(0.48, (canvasHeight - 1 - bottom) / canvasHeight)),
              typicalColumnSpan75Ratio: span75 > 0 ? Math.max(0.02, Math.min(1, span75 / canvasHeight)) : 0,
            };
          }
        } else {
          const svg = element.matches('svg') ? element : element.querySelector('svg');
          if (svg && typeof svg.getBBox === 'function') {
            const box = svg.getBBox();
            const viewBox = svg.viewBox && svg.viewBox.baseVal;
            if (box && viewBox && box.width > 0 && box.height > 0 && viewBox.width > 0 && viewBox.height > 0) {
              metrics = {
                inkWidthRatio: Math.max(0.06, Math.min(1, box.width / viewBox.width)),
                inkHeightRatio: Math.max(0.06, Math.min(1, box.height / viewBox.height)),
                topPaddingRatio: Math.max(0, Math.min(0.48, (box.y - viewBox.y) / viewBox.height)),
                bottomPaddingRatio: Math.max(0, Math.min(0.48, (viewBox.y + viewBox.height - box.y - box.height) / viewBox.height)),
              };
            }
          }
        }
      } catch (_) {
        metrics = null;
      }
      cv7991FormulaInkMetricsCache.set(element, metrics);
      return metrics;
    }

    function cv7991EstimateFormulaBottomPaddingRatio(element) {
      const metrics = cv7991MeasureFormulaInkMetrics(element);
      return metrics ? metrics.bottomPaddingRatio : null;
    }

    function cv7991PresenterEquationHtml(equation) {
      const rawXml = String(equation && equation.xml || '').trim();
      if (!rawXml) return '<span class="single-exam-inline-fallback">[Công thức]</span>';
      const parser = new DOMParser();
      const doc = parser.parseFromString(rawXml, 'application/xml');
      const firstChildByLocalName = (node, localName) => {
        const wanted = String(localName || '').toLowerCase();
        return Array.from(node && node.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === wanted) || null;
      };
      const childElements = (node) => Array.from(node && node.childNodes || []).filter((child) => child && child.nodeType === Node.ELEMENT_NODE);
      const attrByLocalName = (node, localName, fallback = '') => {
        const wanted = String(localName || '').toLowerCase();
        const attrs = Array.from(node && node.attributes || []);
        const found = attrs.find((attr) => String(attr.localName || attr.name || '').toLowerCase() === wanted);
        return found ? String(found.value || '') : fallback;
      };
      const valFromNode = (node, fallback = '') => node ? (node.getAttribute('m:val') || node.getAttribute('w:val') || node.getAttribute('val') || attrByLocalName(node, 'val', fallback) || fallback) : fallback;
      const childValue = (node, localName, fallback = '') => valFromNode(firstChildByLocalName(node, localName), fallback);
      const childRawValue = (node, localName) => {
        const child = firstChildByLocalName(node, localName);
        if (!child) return null;
        const attrs = Array.from(child.attributes || []);
        const found = attrs.find((attr) => String(attr.localName || attr.name || '').toLowerCase() === 'val');
        return found ? String(found.value || '') : '';
      };
      const isEmptyDelimiter = (value) => {
        const text = String(value == null ? '' : value).trim();
        return !text || text === '∅' || /^none$/i.test(text) || /^nil$/i.test(text);
      };
      const texSymbolMap = {
        "±": "\\pm ", "∓": "\\mp ", "−": "-", "–": "-",
        "—": "-", "×": "\\times ", "÷": "\\div ", "·": "\\cdot ",
        "⋅": "\\cdot ", "≤": "\\le ", "≥": "\\ge ", "≠": "\\ne ",
        "≈": "\\approx ", "≡": "\\equiv ", "≅": "\\cong ", "∞": "\\infty ",
        "π": "\\pi ", "Π": "\\Pi ", "∆": "\\Delta ", "Δ": "\\Delta ",
        "∂": "\\partial ", "∇": "\\nabla ", "∠": "\\angle ", "√": "\\sqrt{}",
        "∑": "\\sum ", "∫": "\\int ", "∏": "\\prod ", "∈": "\\in ",
        "∉": "\\notin ", "∅": "\\varnothing ", "∝": "\\propto ", "∪": "\\cup ",
        "∩": "\\cap ", "⊂": "\\subset ", "⊆": "\\subseteq ", "⊃": "\\supset ",
        "⊇": "\\supseteq ", "∀": "\\forall ", "∃": "\\exists ", "∧": "\\wedge ",
        "∨": "\\vee ", "¬": "\\neg ", "⇒": "\\Rightarrow ", "⇔": "\\Leftrightarrow ",
        "→": "\\to ", "←": "\\leftarrow ", "↔": "\\leftrightarrow ", "°": "^{\\circ}",
        "′": "^{\\prime}", "″": "^{\\prime\\prime}", "…": "\\ldots ", "⋯": "\\cdots ",
        "∴": "\\therefore ", "∵": "\\because ", "⊥": "\\perp ", "∥": "\\parallel ",
        "α": "\\alpha ", "β": "\\beta ", "γ": "\\gamma ", "Γ": "\\Gamma ",
        "δ": "\\delta ", "ε": "\\varepsilon ", "ζ": "\\zeta ", "η": "\\eta ",
        "θ": "\\theta ", "Θ": "\\Theta ", "ι": "\\iota ", "κ": "\\kappa ",
        "λ": "\\lambda ", "Λ": "\\Lambda ", "μ": "\\mu ", "ν": "\\nu ",
        "ξ": "\\xi ", "Ξ": "\\Xi ", "ρ": "\\rho ", "σ": "\\sigma ",
        "Σ": "\\Sigma ", "τ": "\\tau ", "φ": "\\varphi ", "Φ": "\\Phi ",
        "χ": "\\chi ", "ψ": "\\psi ", "Ψ": "\\Psi ", "ω": "\\omega ",
        "Ω": "\\Omega "
      };
      const texMathSpace = (ch) => {
        if (ch === '\u2000' || ch === '\u2002') return '\\enspace{}';
        if (ch === '\u2001' || ch === '\u2003') return '\\quad{}';
        if (ch === '\u2004' || ch === '\u2005') return '\\;';
        if (ch === '\u2006' || ch === '\u2009' || ch === '\u200A') return '\\,';
        if (/\s/.test(ch)) return '\\,';
        return '';
      };
      const texText = (value) => String(value || '').split('').map((ch) => {
        const mathSpace = texMathSpace(ch);
        if (mathSpace) return mathSpace;
        if (texSymbolMap[ch]) return texSymbolMap[ch];
        if (/[A-Za-z0-9]/.test(ch)) return ch;
        if (ch === '\\') return '\\backslash ';
        if (ch === '{') return '\\{';
        if (ch === '}') return '\\}';
        if (ch === '_') return '\\_';
        if (ch === '^') return '\\^{}';
        if (ch === '#') return '\\#';
        if (ch === '$') return '\\$';
        if (ch === '%') return '\\%';
        if (ch === '&') return '\\&';
        if (ch === '~') return '\\sim ';
        return ch;
      }).join('');
      const texTextMode = (value) => String(value || '').replace(/[\\{}$%&#_^~]/g, (ch) => ({
        '\\': '\\textbackslash{}', '{': '\\{', '}': '\\}', '$': '\\$', '%': '\\%', '&': '\\&', '#': '\\#', '_': '\\_', '^': '\\^{}', '~': '\\textasciitilde{}'
      }[ch] || ch));
      const texGroup = (value) => `{${String(value || '').trim() || ' '}}`;
      const isPrElement = (node) => /pr$/i.test(String(node && node.localName || ''));
      const ommlPlainText = (node) => {
        const parts = [];
        const walk = (current) => {
          if (!current) return;
          if (current.nodeType === Node.TEXT_NODE) {
            parts.push(current.nodeValue || '');
            return;
          }
          if (current.nodeType !== Node.ELEMENT_NODE) return;
          if (isPrElement(current)) return;
          Array.from(current.childNodes || []).forEach(walk);
        };
        walk(node);
        return parts.join('');
      };
      const mathFunctionTex = (value) => {
        const name = String(value || '').trim().toLowerCase();
        const map = { sin: '\\sin', cos: '\\cos', tan: '\\tan', cot: '\\cot', log: '\\log', ln: '\\ln', lim: '\\lim', det: '\\det', max: '\\max', min: '\\min' };
        return map[name] || '';
      };
      const scriptTex = (node) => {
        const raw = ommlPlainText(node).replace(/\s+/g, ' ').trim();
        if (raw && /[À-ỹĂăÂâĐđÊêÔôƠơƯư]/.test(raw)) return `\\text{${texTextMode(raw)}}`;
        return renderTex(node);
      };
      const ommlArrayRowsTex = (arrayNode) => {
        const localName = String(arrayNode && arrayNode.localName || '').toLowerCase();
        if (!arrayNode) return [];
        if (localName === 'eqarr') {
          return childElements(arrayNode)
            .filter((child) => !isPrElement(child))
            .map((row) => renderTex(row).trim())
            .filter(Boolean);
        }
        if (localName === 'm') {
          return childElements(arrayNode)
            .filter((row) => !isPrElement(row))
            .map((row) => {
              const rowLocal = String(row && row.localName || '').toLowerCase();
              const cells = rowLocal === 'mr'
                ? childElements(row).filter((cell) => !isPrElement(cell))
                : [row];
              const renderedCells = cells
                .map((cell) => renderTex(cell).trim())
                .filter(Boolean);
              return renderedCells.join(' & ');
            })
            .filter(Boolean);
        }
        return [];
      };
      const ommlArrayNodeFromBody = (bodyNode) => {
        if (!bodyNode) return null;
        const localName = String(bodyNode.localName || '').toLowerCase();
        if (localName === 'eqarr' || localName === 'm') return bodyNode;
        return childElements(bodyNode).find((child) => {
          const childLocal = String(child && child.localName || '').toLowerCase();
          return childLocal === 'eqarr' || childLocal === 'm';
        }) || null;
      };
      const texDelimiter = (value, fallback) => {
        const text = String(value || fallback || '').trim();
        if (!text) return '.';
        if (text === '{') return '\\{';
        if (text === '}') return '\\}';
        if (text === '⟨') return '\\langle';
        if (text === '⟩') return '\\rangle';
        if (text === '∅') return '.';
        return text;
      };
      const renderTex = (node) => {
        if (!node) return '';
        if (node.nodeType === Node.TEXT_NODE) return texText(node.nodeValue || '');
        if (node.nodeType !== Node.ELEMENT_NODE) return '';
        const local = String(node.localName || '').toLowerCase();
        if (isPrElement(node) || ['ctrlpr', 'argpr', 'rpr', 'alnctr', 'basejc', 'brkbin', 'brkbinsub', 'defjc', 'dispdef', 'intlim', 'narylim', 'smallfrac', 'wrapindent', 'wrapright', 'degHide', 'subHide', 'supHide', 'grow', 'show'].includes(local)) return '';
        if (local === 'aln') return '&';
        if (local === 'brk') return '\\';
        if (local === 't') return texText(node.textContent || '');
        if (local === 'r') {
          const rawRunText = ommlPlainText(node).replace(/\s+/g, ' ').trim();
          const fnTex = mathFunctionTex(rawRunText);
          // Chặn tên toán tử TeX dính với ký tự của run kế tiếp (ví dụ sin + x
          // không được thành \\sinx, vốn là một lệnh MathJax không tồn tại).
          if (fnTex) return `${fnTex}{}`;
          const mathRunPr = firstChildByLocalName(node, 'rPr');
          if (firstChildByLocalName(mathRunPr, 'nor') && rawRunText) {
            return `\\text{${texTextMode(rawRunText)}}`;
          }
          return Array.from(node.childNodes || []).map(renderTex).join('');
        }
        if (local === 'e' || local === 'box' || local === 'mr' || local === 'num' || local === 'den' || local === 'sub' || local === 'sup' || local === 'deg') {
          return Array.from(node.childNodes || []).map(renderTex).join('');
        }
        if (local === 'omath' || local === 'omathpara') return Array.from(node.childNodes || []).map(renderTex).join('');
        if (local === 'ssub') {
          const base = renderTex(firstChildByLocalName(node, 'e'));
          const sub = scriptTex(firstChildByLocalName(node, 'sub'));
          return `${base}_${texGroup(sub)}`;
        }
        if (local === 'ssup') {
          const base = renderTex(firstChildByLocalName(node, 'e'));
          const sup = scriptTex(firstChildByLocalName(node, 'sup'));
          return `${base}^${texGroup(sup)}`;
        }
        if (local === 'ssubsup') {
          const base = renderTex(firstChildByLocalName(node, 'e'));
          const sub = scriptTex(firstChildByLocalName(node, 'sub'));
          const sup = scriptTex(firstChildByLocalName(node, 'sup'));
          return `${base}_${texGroup(sub)}^${texGroup(sup)}`;
        }
        if (local === 'spre') {
          const base = renderTex(firstChildByLocalName(node, 'e'));
          const sub = scriptTex(firstChildByLocalName(node, 'sub'));
          const sup = scriptTex(firstChildByLocalName(node, 'sup'));
          const pre = `${sub ? `_${texGroup(sub)}` : ''}${sup ? `^${texGroup(sup)}` : ''}`;
          return `{}${pre}${base ? texGroup(base) : ''}`;
        }
        if (local === 'f') {
          const fPr = firstChildByLocalName(node, 'fPr');
          const type = childValue(fPr, 'type', 'bar');
          const num = renderTex(firstChildByLocalName(node, 'num'));
          const den = renderTex(firstChildByLocalName(node, 'den'));
          if (/noBar/i.test(type)) return `\\genfrac{}{}{0pt}{}{${num}}{${den}}`;
          if (/lin/i.test(type)) return `(${num})/(${den})`;
          return `\\frac{${num}}{${den}}`;
        }
        if (local === 'rad') {
          const deg = renderTex(firstChildByLocalName(node, 'deg'));
          const body = renderTex(firstChildByLocalName(node, 'e'));
          return deg ? `\\sqrt[${deg}]{${body}}` : `\\sqrt{${body}}`;
        }
        if (local === 'nary') {
          const naryPr = firstChildByLocalName(node, 'naryPr');
          // Theo OMML của Word, m:nary không có m:chr thì ký hiệu mặc định là tích phân.
          // Nếu mặc định là tổng xích ma, các công thức ∫_0^1 ... dx trong phần trình chiếu sẽ bị đổi thành Σ.
          const rawSymbol = childValue(naryPr, 'chr', '∫');
          const symbolMap = { '∑': '\\sum', '∫': '\\int', '∏': '\\prod', '∐': '\\coprod', '⋃': '\\bigcup', '⋂': '\\bigcap' };
          const symbol = symbolMap[rawSymbol] || texText(rawSymbol || '∫');
          const sub = scriptTex(firstChildByLocalName(node, 'sub'));
          const sup = scriptTex(firstChildByLocalName(node, 'sup'));
          const body = renderTex(firstChildByLocalName(node, 'e'));
          return `${symbol}${sub ? `_${texGroup(sub)}` : ''}${sup ? `^${texGroup(sup)}` : ''}${body ? ` ${body}` : ''}`;
        }
        if (local === 'm') {
          const rows = ommlArrayRowsTex(node);
          if (rows.length) return `\\begin{matrix}${rows.join('\\\\')}\\end{matrix}`;
          return childElements(node).filter((child) => !isPrElement(child)).map(renderTex).join('');
        }
        if (local === 'd') {
          const dPr = firstChildByLocalName(node, 'dPr');
          const begRaw = childRawValue(dPr, 'begChr');
          const endRaw = childRawValue(dPr, 'endChr');
          const begText = begRaw == null ? '(' : begRaw;
          const beg = texDelimiter(isEmptyDelimiter(begText) ? '.' : begText, '(');
          const endText = endRaw == null ? (String(begText).trim() === '{' ? '.' : ')') : endRaw;
          const end = texDelimiter(isEmptyDelimiter(endText) ? '.' : endText, '.');
          const bodyNode = firstChildByLocalName(node, 'e');
          const arrayNode = ommlArrayNodeFromBody(bodyNode);
          const arrayRows = ommlArrayRowsTex(arrayNode);
          if (String(begRaw || '').trim() === '{' && arrayRows.length > 1 && isEmptyDelimiter(endRaw)) {
            return `\\left\\{\\begin{array}{l}${arrayRows.join('\\\\')}\\end{array}\\right.`;
          }
          const body = bodyNode ? renderTex(bodyNode) : childElements(node).filter((child) => String(child.localName || '').toLowerCase() !== 'dpr').map(renderTex).join('');
          return `\\left${beg}${body}\\right${end}`;
        }
        if (local === 'bar') {
          const barPr = firstChildByLocalName(node, 'barPr');
          const explicitPos = childRawValue(barPr, 'pos');
          let insideLowerLimit = false;
          let ancestor = node.parentNode;
          while (ancestor && ancestor !== root) {
            if (String(ancestor.localName || '').toLowerCase() === 'limlow') {
              insideLowerLimit = true;
              break;
            }
            ancestor = ancestor.parentNode;
          }
          /* Word có thể bỏ m:pos ở gạch dưới khi chính m:bar đang làm cơ số
             của m:limLow. Giữ mặc định top cho bar thông thường, nhưng với
             cấu trúc này phải suy ra bot để khớp đúng Equation gốc. */
          const pos = explicitPos == null ? (insideLowerLimit ? 'bot' : 'top') : explicitPos;
          const body = renderTex(firstChildByLocalName(node, 'e'));
          return /bot/i.test(pos) ? `\\underline{${body}}` : `\\overline{${body}}`;
        }
        if (local === 'acc') {
          const accPr = firstChildByLocalName(node, 'accPr');
          const chr = childValue(accPr, 'chr', '^');
          const body = renderTex(firstChildByLocalName(node, 'e'));
          if (chr === 'ˆ' || chr === '^') {
            const compactBody = String(body || '').replace(/\s+/g, '');
            const plainBody = compactBody.replace(/[{}]/g, '');
            const looksMultiCharAccent = plainBody.length > 1 || /\\[A-Za-z]+/.test(compactBody);
            return looksMultiCharAccent ? `\\widehat{${body}}` : `\\hat{${body}}`;
          }
          if (chr === '⏜' || chr === '︵') return `\\overparen{${body}}`;
          if (chr === '¯') return `\\bar{${body}}`;
          if (chr === '→' || chr === '⃗') {
            const compactBody = String(body || '').replace(/\s+/g, '');
            const plainBody = compactBody.replace(/[{}]/g, '');
            const looksMultiCharVector = plainBody.length > 1 || /\\[A-Za-z]+/.test(compactBody);
            return looksMultiCharVector ? `\\overrightarrow{${body}}` : `\\vec{${body}}`;
          }
          if (chr === '˜' || chr === '~' || chr === '̃') {
            const compactBody = String(body || '').replace(/\s+/g, '');
            const plainBody = compactBody.replace(/[{}]/g, '');
            const looksMultiCharAccent = plainBody.length > 1 || /\\[A-Za-z]+/.test(compactBody);
            return looksMultiCharAccent ? `\\widetilde{${body}}` : `\\tilde{${body}}`;
          }
          if (chr === '˙') return `\\dot{${body}}`;
          if (chr === '¨') return `\\ddot{${body}}`;
          return `\\overset{${texText(chr)}}{${body}}`;
        }
        if (local === 'groupchr') {
          const groupPr = firstChildByLocalName(node, 'groupChrPr');
          const chr = childValue(groupPr, 'chr', '⏞');
          const pos = childValue(groupPr, 'pos', 'top');
          const vertJc = childValue(groupPr, 'vertJc', 'top');
          const body = renderTex(firstChildByLocalName(node, 'e'));
          // Trong OMML của Word: overbrace thường có chr=⏞, pos=top, vertJc=bot;
          // underbrace thường có chr=⏟, pos=bot, vertJc=top. Không dùng vertJc để xác định hướng,
          // vì vertJc chỉ mô tả vị trí chữ chú thích, không phải hướng của dấu ngoặc.
          const low = (chr === '⏟') || /bot/i.test(pos);
          const high = (chr === '⏞') || chr === '︷' || /top/i.test(pos);
          if (low) return `\\underbrace{${body}}`;
          if (high) return `\\overbrace{${body}}`;
          return low ? `\\underset{${texText(chr)}}{${body}}` : `\\overset{${texText(chr)}}{${body}}`;
        }
        if (local === 'borderbox') {
          const body = renderTex(firstChildByLocalName(node, 'e'));
          return `\\boxed{${body}}`;
        }
        if (local === 'phant') {
          const body = renderTex(firstChildByLocalName(node, 'e')) || Array.from(node.childNodes || []).map(renderTex).join('');
          return `\\phantom{${body}}`;
        }
        if (local === 'func') {
          const fNameNode = firstChildByLocalName(node, 'fName');
          const fNameRaw = ommlPlainText(fNameNode).replace(/\s+/g, ' ').trim();
          const fName = mathFunctionTex(fNameRaw) || (fNameRaw ? `\\operatorname{${texTextMode(fNameRaw)}}` : '');
          const body = renderTex(firstChildByLocalName(node, 'e'));
          return `${fName} ${body}`;
        }
        if (local === 'limlow') {
          const baseRaw = ommlPlainText(firstChildByLocalName(node, 'e')).replace(/\s+/g, ' ').trim();
          const functionBase = mathFunctionTex(baseRaw);
          const base = functionBase || renderTex(firstChildByLocalName(node, 'e'));
          const lim = scriptTex(firstChildByLocalName(node, 'lim'));
          return functionBase ? `${base}_${texGroup(lim)}` : `\\underset{${lim}}{${base}}`;
        }
        if (local === 'limupp') {
          const baseRaw = ommlPlainText(firstChildByLocalName(node, 'e')).replace(/\s+/g, ' ').trim();
          const functionBase = mathFunctionTex(baseRaw);
          const base = functionBase || renderTex(firstChildByLocalName(node, 'e'));
          const lim = scriptTex(firstChildByLocalName(node, 'lim'));
          return functionBase ? `${base}^${texGroup(lim)}` : `\\overset{${lim}}{${base}}`;
        }
        if (local === 'eqarr') {
          const rows = childElements(node)
            .filter((child) => !/pr$/i.test(String(child.localName || '')))
            .map(renderTex)
            .filter(Boolean);
          return `\\begin{aligned}${rows.join('\\\\')}\\end{aligned}`;
        }
        return Array.from(node.childNodes || []).map(renderTex).join('');
      };
      const root = doc.documentElement;
      const tex = renderTex(root).replace(/\s+/g, ' ').trim();
      /* Equation nằm trong dòng của Word dùng math style nội dòng; chỉ
         m:oMathPara độc lập mới dùng display style. Ép mọi OMML sang
         displaystyle làm phân thức rộng/cao hơn bản gốc và đẩy Câu 17 xuống
         dòng dù kích thước trang/bảng vẫn đúng. */
      const requestedMathStyle = String(equation && equation.mvipMathStyle || '').toLowerCase() === 'text'
        ? '\\textstyle '
        : '\\displaystyle ';
      const texForMathJax = tex
        ? (/^\\(?:display|text)style\b/.test(tex) ? tex : `${requestedMathStyle}${tex}`)
        : '';
      if (texForMathJax && window.MathJax && typeof window.MathJax.tex2svg === 'function') {
        try {
          const svg = cv7991MathJaxSvgFromTex(window.MathJax, texForMathJax);
          if (svg) {
            svg.setAttribute('class', `${svg.getAttribute('class') || ''} single-exam-mathjax-svg`.trim());
            svg.setAttribute('color', 'currentColor');
            svg.style.color = 'currentColor';
            svg.style.background = 'transparent';
            svg.style.maxWidth = '100%';
            svg.style.overflow = 'visible';
            const svgMarkup = (typeof XMLSerializer !== 'undefined') ? new XMLSerializer().serializeToString(svg) : svg.outerHTML;
            if (svgMarkup) return `<span class="single-exam-mathjax-equation">${svgMarkup}</span>`;
          }
        } catch (_) {}
      }
      const ommlArrayRowsHtml = (arrayNode) => {
        const localName = String(arrayNode && arrayNode.localName || '').toLowerCase();
        if (!arrayNode) return [];
        if (localName === 'eqarr') {
          return childElements(arrayNode)
            .filter((child) => !isPrElement(child))
            .map((row) => renderNode(row))
            .filter((row) => String(row || '').trim());
        }
        if (localName === 'm') {
          return childElements(arrayNode)
            .filter((row) => !isPrElement(row))
            .map((row) => {
              const rowLocal = String(row && row.localName || '').toLowerCase();
              const cells = rowLocal === 'mr'
                ? childElements(row).filter((cell) => !isPrElement(cell))
                : [row];
              return cells
                .map((cell) => renderNode(cell))
                .filter((cell) => String(cell || '').trim())
                .join('<span class="single-exam-matrix-gap"> </span>');
            })
            .filter((row) => String(row || '').trim());
        }
        return [];
      };
      const renderNode = (node) => {
        if (!node) return '';
        if (node.nodeType === Node.TEXT_NODE) return escapeHtml(node.nodeValue || '');
        if (node.nodeType !== Node.ELEMENT_NODE) return '';
        const local = String(node.localName || '').toLowerCase();
        if (local === 't') return escapeHtml(node.textContent || '');
        if (local === 'r' || local === 'e' || local === 'box' || local === 'mr') return Array.from(node.childNodes || []).map(renderNode).join('');
        if (local === 'omath' || local === 'omathpara') return Array.from(node.childNodes || []).map(renderNode).join('');
        if (local === 'ssub') {
          const base = renderNode(firstChildByLocalName(node, 'e'));
          const sub = renderNode(firstChildByLocalName(node, 'sub'));
          return `${base}<sub>${sub}</sub>`;
        }
        if (local === 'ssup') {
          const base = renderNode(firstChildByLocalName(node, 'e'));
          const sup = renderNode(firstChildByLocalName(node, 'sup'));
          return `${base}<sup>${sup}</sup>`;
        }
        if (local === 'ssubsup') {
          const base = renderNode(firstChildByLocalName(node, 'e'));
          const sub = renderNode(firstChildByLocalName(node, 'sub'));
          const sup = renderNode(firstChildByLocalName(node, 'sup'));
          return `${base}<sup>${sup}</sup><sub>${sub}</sub>`;
        }
        if (local === 'f') {
          const num = renderNode(firstChildByLocalName(node, 'num'));
          const den = renderNode(firstChildByLocalName(node, 'den'));
          return `<span class="single-exam-frac"><span class="num">${num}</span><span class="den">${den}</span></span>`;
        }
        if (local === 'rad') {
          const deg = renderNode(firstChildByLocalName(node, 'deg'));
          const body = renderNode(firstChildByLocalName(node, 'e'));
          const degHtml = deg ? `<sup>${deg}</sup>` : '';
          return `${degHtml}<span class="single-exam-rad"><span class="rad-sign">√</span><span class="rad-body">${body}</span></span>`;
        }
        if (local === 'nary') {
          const naryPr = firstChildByLocalName(node, 'naryPr');
          const rawSymbol = childValue(naryPr, 'chr', '∫');
          const symbol = escapeHtml(rawSymbol || '∫');
          const sub = renderNode(firstChildByLocalName(node, 'sub'));
          const sup = renderNode(firstChildByLocalName(node, 'sup'));
          const body = renderNode(firstChildByLocalName(node, 'e'));
          return `<span>${symbol}${sup ? `<sup>${sup}</sup>` : ''}${sub ? `<sub>${sub}</sub>` : ''}${body}</span>`;
        }
        if (local === 'eqarr') {
          const rows = ommlArrayRowsHtml(node);
          return `<span class="single-exam-eqarr">${rows.map((row) => `<span class="system-row">${row}</span>`).join('')}</span>`;
        }
        if (local === 'm') {
          const rows = ommlArrayRowsHtml(node);
          return `<span class="single-exam-eqarr">${rows.map((row) => `<span class="system-row">${row}</span>`).join('')}</span>`;
        }
        if (local === 'd') {
          const dPr = firstChildByLocalName(node, 'dPr');
          const begRaw = childRawValue(dPr, 'begChr');
          const endRaw = childRawValue(dPr, 'endChr');
          const bodyNode = firstChildByLocalName(node, 'e');
          const arrayNode = ommlArrayNodeFromBody(bodyNode);
          if (String(begRaw || '').trim() === '{' && arrayNode && isEmptyDelimiter(endRaw)) {
            const rows = ommlArrayRowsHtml(arrayNode);
            if (rows.length > 1) {
              return `<span class="single-exam-system"><span class="system-brace">{</span><span class="system-rows">${rows.map((row) => `<span class="system-row">${row}</span>`).join('')}</span></span>`;
            }
          }
          const body = bodyNode ? renderNode(bodyNode) : childElements(node).filter((child) => String(child.localName || '').toLowerCase() !== 'dpr').map(renderNode).join('');
          const beg = isEmptyDelimiter(begRaw) ? '' : escapeHtml(String(begRaw || ''));
          const end = isEmptyDelimiter(endRaw) ? '' : escapeHtml(String(endRaw || ''));
          return `<span>${beg}${body}${end}</span>`;
        }
        return Array.from(node.childNodes || []).map(renderNode).join('');
      };
      const html = renderNode(root) || '<span class="single-exam-inline-fallback">[Công thức]</span>';
      return `<span class="single-exam-rich">${html}</span>`;
    }

    function cv7991PresenterTableHtml(tableData, context = {}) {
      const rows = Array.isArray(tableData && tableData.rows) ? tableData.rows : [];
      if (!rows.length) return '<span class="single-exam-inline-fallback">[Bảng số liệu]</span>';
      const styleAttr = (parts) => {
        const value = (Array.isArray(parts) ? parts : []).filter(Boolean).join(';');
        return value ? ` style="${escapeHtml(value)}"` : '';
      };
      const borderCss = (border) => {
        if (!border) return '';
        const style = String(border.style || '').toLowerCase();
        if (style === 'hidden') return '0 hidden transparent';
        if (style === 'none') return '0 none transparent';
        const width = Math.max(0.67, Number(border.widthPx) || 1.333);
        const color = /^#[0-9a-f]{6}$/i.test(String(border.color || '')) ? border.color : '#000000';
        const allowed = ['solid', 'double', 'dotted', 'dashed', 'inset', 'outset'];
        return `${Math.round(width * 100) / 100}px ${allowed.includes(style) ? style : 'solid'} ${color}`;
      };
      const renderRun = (run) => {
        const item = run && typeof run === 'object' ? run : { text: String(run || '') };
        let content = cv7991PresenterHtmlFromText(String(item.text || ''), context);
        if (item.script === 'sup') content = `<sup>${content}</sup>`;
        else if (item.script === 'sub') content = `<sub>${content}</sub>`;
        const format = item.style || {};
        const css = [];
        if (format.bold === true) css.push('font-weight:700');
        else if (format.bold === false) css.push('font-weight:400');
        if (format.italic === true) css.push('font-style:italic');
        else if (format.italic === false) css.push('font-style:normal');
        if (format.underline === true) css.push('text-decoration-line:underline');
        else if (format.underline === false) css.push('text-decoration-line:none');
        if (/^#[0-9a-f]{6}$/i.test(String(format.color || ''))) css.push(`color:${format.color}`);
        const sourceFont = Number(format.fontSizePt) > 0
          ? ` data-cv-source-font-px="${Number(format.fontSizePt) * 96 / 72}"` : '';
        return css.length || sourceFont ? `<span${sourceFont}${styleAttr(css)}>${content}</span>` : content;
      };
      const renderCellContent = (cell) => {
        const paragraphs = Array.isArray(cell && cell.paragraphs) ? cell.paragraphs : [];
        if (!paragraphs.length) return cv7991PresenterHtmlFromText(String(cell && cell.text || ''), context);
        return paragraphs.map((paragraph) => {
          const css = [];
          const align = String(paragraph && paragraph.align || '').toLowerCase();
          if (['left', 'right', 'center', 'justify'].includes(align)) css.push(`text-align:${align}`);
          const runs = Array.isArray(paragraph && paragraph.runs) ? paragraph.runs : [];
          return `<div class="cv7991-word-table-paragraph"${styleAttr(css)}>${runs.map(renderRun).join('')}</div>`;
        }).join('');
      };
      const widths = Array.isArray(tableData && tableData.columnWidths) ? tableData.columnWidths.map((value) => Number(value) || 0) : [];
      const totalWidth = widths.reduce((sum, value) => sum + Math.max(0, value), 0);
      const colgroup = totalWidth > 0
        ? `<colgroup>${widths.map((value) => `<col style="width:${Math.max(0.1, value / totalWidth * 100).toFixed(4)}%">`).join('')}</colgroup>`
        : '';
      const requestedRowHeights = Array.isArray((tableData && tableData.rowHeightPercentages) || (context && context.cv7991RowHeightPercentages))
        ? ((tableData && tableData.rowHeightPercentages) || (context && context.cv7991RowHeightPercentages)) : [];
      const body = rows.map((row, rowIndex) => {
        const titleClass = rowIndex === 0 && tableData && tableData.firstRowMerged ? ' class="cv7991-table-title-row"' : '';
        const rowHeightPct = Number(requestedRowHeights[rowIndex]) || 0;
        const rowStyle = rowHeightPct > 0 ? ` style="height:${Math.max(.1, Math.min(100, rowHeightPct)).toFixed(4)}%"` : '';
        const cells = (Array.isArray(row) ? row : []).filter((cell) => cell && !cell.skip).map((cell) => {
          const colSpan = Math.max(1, parseInt(String(cell && cell.gridSpan || 1), 10) || 1);
          const rowSpan = Math.max(1, parseInt(String(cell && cell.rowSpan || 1), 10) || 1);
          const css = [];
          if (/^#[0-9a-f]{6}$/i.test(String(cell && cell.fill || ''))) css.push(`background-color:${cell.fill}`);
          else if (String(cell && cell.fill || '') === 'transparent') css.push('background-color:transparent');
          const vAlign = String(cell && cell.vAlign || '').toLowerCase();
          if (['top', 'middle', 'bottom'].includes(vAlign)) css.push(`vertical-align:${vAlign}`);
          const borders = cell && cell.borders || {};
          ['top', 'right', 'bottom', 'left'].forEach((edge) => {
            const value = borderCss(borders[edge]);
            if (value) css.push(`border-${edge}:${value}`);
          });
          return `<td${colSpan > 1 ? ` colspan="${colSpan}"` : ''}${rowSpan > 1 ? ` rowspan="${rowSpan}"` : ''}${styleAttr(css)}>${renderCellContent(cell)}</td>`;
        }).join('');
        return `<tr${titleClass}${rowStyle} data-cv-source-row-height="${Number(tableData.sourceRowHeightsPx && tableData.sourceRowHeightsPx[rowIndex]) || 0}">${cells}</tr>`;
      }).join('');
      const extraClass = tableData && tableData.isTextBoxTable ? ' cv7991-textbox-table' : '';
      return `<table class="single-exam-inline-table${extraClass}" data-cv-source-indent="${Number(tableData.sourceTableIndentPx) || 0}" data-cv-source-width="${totalWidth > 0 ? totalWidth / 15 : 0}">${colgroup}<tbody>${body}</tbody></table>`;
    }

    function cv7991PresenterWordGroupHtml(image, context = {}) {
      const group = image && image.wordGroupData;
      const shapes = Array.isArray(group && group.shapes) ? group.shapes : [];
      const view = group && group.viewBox || {};
      if (!shapes.length || !(Number(view.width) > 0) || !(Number(view.height) > 0)) {
        return '<span class="single-exam-inline-fallback">[Sơ đồ Word]</span>';
      }
      const number = (value) => Math.round((Number(value) || 0) * 1000) / 1000;
      const markerId = `cv-wg-arrow-${String(image && image.relId || 'g').replace(/[^a-z0-9_-]/gi, '')}`;
      const map = (context && context.imageMap) || {};
      const body = shapes.map((shape) => {
        if (!shape) return '';
        if (shape.type === 'officeShape') {
          const geometryApi = window.mvipOfficeDrawingGeometry || null;
          if (!geometryApi || typeof geometryApi.shapeSvgElement !== 'function') return '';
          try {
            let shapePlan = shape.plan || null;
            if (!shapePlan && shape.shapeXml && typeof geometryApi.shapePlanFromNode === 'function') {
              const parsedShape = new DOMParser().parseFromString(String(shape.shapeXml), 'application/xml');
              if (!parsedShape.getElementsByTagName('parsererror').length) {
                shapePlan = geometryApi.shapePlanFromNode(
                  parsedShape.documentElement,
                  shape.themeColors || {}
                );
                if (shapePlan) {
                  shapePlan.geometryWidthPx = Math.max(.5, Number(shape.width) || .5);
                  shapePlan.geometryHeightPx = Math.max(.5, Number(shape.height) || .5);
                }
              }
            }
            if (!shapePlan) return '';
            /* Text Box trong DrawingML Group đôi khi đã được nhận dạng thành
               officeShape trước khi nội dung chữ được tách riêng. Bộ dựng
               Shape dùng font theo pixel nhưng SVG nhóm dùng viewBox hàng
               triệu đơn vị, khiến A/B/C... co thành một chấm. Dựng chữ trực
               tiếp trong hệ tọa độ của nhóm để luôn giữ đúng tỷ lệ. */
            const textLines = Array.isArray(shapePlan.textLines)
              ? shapePlan.textLines.map((line) => String(line || '')).filter(Boolean)
              : [];
            if (textLines.length) {
              const shapeX = Number(shape.x) || 0;
              const shapeY = Number(shape.y) || 0;
              const shapeWidth = Math.max(.5, Number(shape.width) || .5);
              const shapeHeight = Math.max(.5, Number(shape.height) || .5);
              const lineHeight = Math.max(8,
                Math.min(shapeHeight * .62,
                  shapeHeight * .5 / Math.max(1, textLines.length))
              );
              const centerX = shapeX + shapeWidth / 2;
              const startY = shapeY + shapeHeight / 2
                - (textLines.length - 1) * lineHeight * .6;
              const fill = String(shapePlan.fill || '').toLowerCase();
              const mask = fill && !['none', 'transparent'].includes(fill)
                ? `<rect x="${number(shapeX)}" y="${number(shapeY)}" width="${number(shapeWidth)}" height="${number(shapeHeight)}" fill="${escapeHtml(String(shapePlan.fill))}" stroke="none"/>`
                : '';
              const tspans = textLines.map((line, index) =>
                `<tspan x="${number(centerX)}"${index ? ` dy="${number(lineHeight * 1.2)}"` : ''}>${escapeHtml(line)}</tspan>`
              ).join('');
              return `<g>${mask}<text x="${number(centerX)}" y="${number(startY)}" text-anchor="middle" dominant-baseline="middle" font-family="Times New Roman, Times, serif" font-size="${number(lineHeight)}" fill="${escapeHtml(String(shapePlan.textColor || '#111111'))}">${tspans}</text></g>`;
            }
            const vector = geometryApi.shapeSvgElement(
              shapePlan,
              String(shape.label || 'Hình vẽ Shapes từ Word')
            );
            if (!(vector instanceof Element)) return '';
            vector.setAttribute('x', String(number(shape.x)));
            vector.setAttribute('y', String(number(shape.y)));
            vector.setAttribute('width', String(Math.max(.5, number(shape.width))));
            vector.setAttribute('height', String(Math.max(.5, number(shape.height))));
            vector.setAttribute('preserveAspectRatio', 'none');
            if (Number(shapePlan.rotation)) {
              vector.style.transformBox = 'fill-box';
              vector.style.transformOrigin = 'center';
              vector.style.transform = `rotate(${number(shapePlan.rotation)}deg)`;
            }
            return new XMLSerializer().serializeToString(vector);
          } catch (_) {
            return '';
          }
        }
        if (shape.type === 'line') {
          const markerStart = shape.startArrow ? ` marker-start="url(#${markerId})"` : '';
          const markerEnd = shape.endArrow ? ` marker-end="url(#${markerId})"` : '';
          return `<line x1="${number(shape.x1)}" y1="${number(shape.y1)}" x2="${number(shape.x2)}" y2="${number(shape.y2)}" stroke="${escapeHtml(String(shape.stroke || '#000000'))}" stroke-width="${Math.max(1, number(shape.strokeWidth || 2))}" stroke-linecap="round"${markerStart}${markerEnd}/>`;
        }
        if (shape.type === 'image') {
          const child = map[String(shape.imageId || '').trim()];
          const src = child ? cv7991PresenterImageDataUrl(child) : '';
          if (!src) return '';
          let x = Number(shape.x) || 0;
          let y = Number(shape.y) || 0;
          let width = Math.max(.5, Number(shape.width) || .5);
          let height = Math.max(.5, Number(shape.height) || .5);
          let isFormula = false;
          if (child && typeof cv7991PresenterImageIsFormula === 'function') {
            try { isFormula = !!cv7991PresenterImageIsFormula(child); } catch (_) {}
          }
          if (isFormula) {
            // MathType được cắt sát nét nên nếu phủ kín hộp DrawingML sẽ lớn hơn chữ
            // và các đường kẻ gốc. Thu nhỏ nhẹ, giữ tâm và hạ một chút trong ô.
            // Ảnh WMF gốc có vùng trắng khá lớn; SVG MathJax đã cắt sát nét.
            // Giữ khoảng 61% hộp gốc để chữ/số cân với đường kẻ của bảng biến thiên.
            const insetX = width * 0.195;
            const insetY = height * 0.2025;
            x += insetX;
            y += insetY;
            width = Math.max(.5, width - insetX * 2);
            height = Math.max(.5, height - insetY * 2);
          }
          return `<image href="${escapeHtml(src)}" x="${number(x)}" y="${number(y)}" width="${number(width)}" height="${number(height)}" preserveAspectRatio="xMidYMid meet"/>`;
        }
        /* Nhãn Text Box được dựng bằng lớp HTML tuyệt đối ở ngoài SVG. Cách
           này tránh việc một số trình duyệt/bộ co giãn của trang Word loại
           phần tử SVG <text> dù vẫn giữ path/line của cùng một nhóm. */
        if (shape.type === 'text' || shape.type === 'wordLabel') return '';
        return '';
      }).map((markup, index) => markup
        ? `<g data-cv7991-drawing-part="${shapes[index].type === 'image' ? 'image' : 'shape'}">${markup}</g>` : '').join('');
      let inlineStyle = cv7991PresenterImageInlineStyle(image);
      let renderedWidthPx = Number(group && group.displayWidthPt) > 0
        ? Number(group.displayWidthPt) * 96 / 72 : 0;
      /* Một số sơ đồ DrawingML không lưu wp:extent hoặc lưu kích thước bằng 0.
         Nếu chỉ để width/height:auto thì SVG con dùng 100% sẽ có hộp 0 x 0 và
         biến mất khi trình chiếu. Suy ra một hộp dự phòng từ viewBox để mọi hình
         vẽ Word luôn có kích thước nhìn thấy được, sau đó bộ co giãn chung vẫn
         tiếp tục giữ đúng tỷ lệ trong vùng trình chiếu. */
      if (!/\bwidth\s*:/i.test(String(inlineStyle || '')) || !/\bheight\s*:/i.test(String(inlineStyle || ''))) {
        const ratio = Math.max(0.2, Math.min(8, Number(view.width) / Math.max(1, Number(view.height)) || 1.6));
        const fallbackWidthPx = Math.max(300, Math.min(820,
          Number(group && group.displayWidthPt) > 0 ? Number(group.displayWidthPt) * 96 / 72 : 620));
        const fallbackHeightPx = Math.max(170, Math.min(520, fallbackWidthPx / ratio));
        renderedWidthPx = fallbackWidthPx;
        const stylePieces = [
          `--cv-presenter-ratio:${number(ratio)}`,
          `--cv-presenter-base-width:${number(fallbackWidthPx)}px`,
          `--cv-presenter-base-height:${number(fallbackHeightPx)}px`,
          `width:${number(fallbackWidthPx)}px`,
          `height:${number(fallbackHeightPx)}px`,
        ];
        inlineStyle = ` style="${stylePieces.join(';')}"`;
      }
      if (!(renderedWidthPx > 0)) renderedWidthPx = 620;
      const htmlLabels = shapes.filter((shape) => shape
        && (shape.type === 'text' || shape.type === 'wordLabel')
        && String(shape.text || '').trim()
      ).map((shape) => {
        const centerX = (Number(shape.x) || 0) + (Number(shape.width) || 0) / 2;
        const centerY = (Number(shape.y) || 0) + (Number(shape.height) || 0) / 2;
        const left = (centerX - Number(view.x || 0)) / Math.max(1, Number(view.width)) * 100;
        const top = (centerY - Number(view.y || 0)) / Math.max(1, Number(view.height)) * 100;
        const sourceFont = Math.max(
          (Number(shape.height) || 0) * .5,
          Number(shape.fontSize) || 0
        );
        const fontSizePx = Math.max(9, Math.min(42,
          sourceFont / Math.max(1, Number(view.width)) * renderedWidthPx
        ));
        return `<span class="cv7991-word-group-html-label" style="left:${number(left)}%;top:${number(top)}%;font-size:${number(fontSizePx)}px;color:${escapeHtml(String(shape.fill || '#111111'))} !important">${escapeHtml(String(shape.text || ''))}</span>`;
      }).join('');
      const wordFlowClass = cv7991PresenterImageKeepsWordFlow(image)
        ? ' cv7991-word-small-flow-image' : '';
      return `<span class="single-exam-inline-vector single-exam-word-group-figure${wordFlowClass}"${inlineStyle}><svg xmlns="http://www.w3.org/2000/svg" viewBox="${number(view.x)} ${number(view.y)} ${Math.max(1, number(view.width))} ${Math.max(1, number(view.height))}" preserveAspectRatio="xMidYMid meet" role="img" aria-label="Sơ đồ hoặc bảng biến thiên từ Word"><defs><marker id="${markerId}" markerWidth="8" markerHeight="8" refX="6.5" refY="3.5" orient="auto" markerUnits="strokeWidth"><path d="M0,0 L7,3.5 L0,7 Z" fill="#111111"/></marker></defs>${body}</svg>${htmlLabels}</span>`;
    }

    function cv7991IsQuestionPresentationContent(element) {
      if (!(element instanceof Element)) return false;
      if (element.closest('#singleExamPresenter')) return true;
      const host = element.closest('#wordPresentationPresenter');
      return !!host && !host.classList.contains('is-ordinary-document')
        && !host.classList.contains('is-powerpoint-slide-mode');
    }

    // A shared policy for native documents, interactive Word, MVIP and lessons.
    // Compare the displayed objects in their own page/question coordinate space.
    // A Shape elsewhere in the question does not affect an independent object.
    const cv7991ZoomObjectSelector = [
      'img', 'canvas', 'svg:not(.single-exam-mathjax-svg)',
      '.single-exam-inline-vector', '.single-exam-word-group-figure',
      '.mvip-office-object', '.mvip-office-inline-object',
      '[data-cv7991-pptx-kind]', 'table.single-exam-inline-table',
      '.ordinary-docx-render table'
    ].join(', ');
    const cv7991ZoomScopeSelector = [
      '.word-presentation-all-question', '.word-presentation-answer-content',
      'section.docx', '.ordinary-xlsx-sheet', '.ordinary-pptx-slide-render',
      '.word-presentation-card', '#singleExamSlide'
    ].join(', ');
    // PowerPoint clicks belong to slide builds, media and native links.
    const cv7991PowerPointNoObjectZoomSelector = [
      '#wordPresentationPresenter.is-powerpoint-slide-mode',
      '.ordinary-pptx-slide-render', '.ordinary-pptx-render'
    ].join(', ');
    const cv7991ZoomExcludedSelector = [
      cv7991PowerPointNoObjectZoomSelector,
      '.single-exam-inline-formula', '.single-exam-mathjax-svg',
      '.mvip-ordinary-inline-formula-svg', '.word-presentation-formula-tail',
      '.word-presentation-ink-canvas', '.cv7991-geometry-canvas',
      '#wordPresentationImageZoomModal', '.mvip-left-temporary-paste-layer',
      '.mvip-whiteboard-pasted-image-layer', '.word-presentation-region-overlay',
      '.word-presentation-region-zoom-pane', '.single-exam-region-overlay',
      '.single-exam-region-zoom-pane'
    ].join(', ');
    const cv7991ZoomShapeSelector = [
      '.single-exam-word-group-figure', '.mvip-office-vector-shape',
      '.mvip-office-vector-group', '[data-office-object-kind="shape"]',
      '[data-office-object-kind="shape-group"]', '[data-cv7991-pptx-kind="shape"]',
      '[data-cv7991-drawing-part="shape"]', 'svg.mvip-word-native-line'
    ].join(', ');

    function cv7991MediaZoomObject(element) {
      if (!(element instanceof Element) || element.closest(cv7991ZoomExcludedSelector)) return null;
      let visual = element.closest(cv7991ZoomObjectSelector);
      if (!visual) return null;
      const office = visual.closest('.mvip-office-object, .mvip-office-inline-object');
      const pptx = visual.closest('[data-cv7991-pptx-kind]');
      const group = visual.closest('.single-exam-word-group-figure, .single-exam-inline-vector');
      visual = office || pptx || group || visual.closest('table.single-exam-inline-table, .ordinary-docx-render table') || visual;
      // An Office group is one clickable visual. Its original members are still
      // checked below, so overlapping members do not become independently zoomable.
      let parentGroup = visual.parentElement && visual.parentElement.closest(
        '[data-cv7991-pptx-kind="group"], .mvip-office-object, .mvip-office-inline-object');
      if (parentGroup) visual = parentGroup;
      if (visual.closest(cv7991ZoomExcludedSelector)) return null;
      // A flattened PDF/page canvas is handled by the viewer's page zoom controls.
      if (visual.matches('canvas') && visual.closest('.ordinary-document-page-host')
          && !visual.closest('.mvip-office-object, [data-cv7991-pptx-kind]')) return null;
      if (visual.matches('[data-cv7991-pptx-kind="text"], [data-cv7991-pptx-kind="media"]')) return null;
      return visual;
    }

    function cv7991MediaZoomObjects(root) {
      if (!(root instanceof Element)) return [];
      const raw = root.matches(cv7991ZoomObjectSelector) ? [root] : [];
      raw.push(...root.querySelectorAll(cv7991ZoomObjectSelector));
      return [...new Set(raw.map(cv7991MediaZoomObject).filter(Boolean))];
    }

    function cv7991ZoomVisibleRect(element) {
      if (!element.isConnected) return null;
      for (let node = element; node instanceof Element; node = node.parentElement) {
        const style = getComputedStyle(node);
        if (node.hasAttribute('hidden') || style.display === 'none'
            || style.visibility === 'hidden' || style.visibility === 'collapse'
            || style.opacity === '0') return null;
        if (node.matches(cv7991ZoomScopeSelector)) break;
      }
      const rect = element.getBoundingClientRect();
      return rect && (rect.width > 0 || rect.height > 0) ? rect : null;
    }

    function cv7991ZoomRectTouches(a, b, padding = .5) {
      return a.left <= b.right + padding && b.left <= a.right + padding
        && a.top <= b.bottom + padding && b.top <= a.bottom + padding;
    }

    function cv7991ZoomSegmentTouches(a, b, rect, padding) {
      // Slab clipping includes endpoints: an arrow touching a figure's border
      // is part of that diagram, but an empty corner of its box is not.
      let lo = 0, hi = 1;
      for (const [key, min, max] of [['x', rect.left - padding, rect.right + padding],
        ['y', rect.top - padding, rect.bottom + padding]]) {
        const d = b[key] - a[key];
        if (Math.abs(d) < 1e-8) { if (a[key] < min || a[key] > max) return false; }
        else {
          const t1 = (min - a[key]) / d, t2 = (max - a[key]) / d;
          lo = Math.max(lo, Math.min(t1, t2)); hi = Math.min(hi, Math.max(t1, t2));
          if (hi < lo) return false;
        }
      }
      return true;
    }

    function cv7991ZoomLineTouches(element, rect) {
      // Narrow phase for arrows/connectors. Filled Shapes retain their object box.
      const selector = 'path, line, polyline, polygon, rect, ellipse, circle, image, text';
      const parts = element.matches(selector) ? [element] : [...element.querySelectorAll(selector)];
      const drawn = parts.filter(part => !part.closest('defs, marker, clipPath, mask')
        && getComputedStyle(part).display !== 'none');
      if (!drawn.length) return true;
      const strokes = [];
      for (const part of drawn) {
        const tag = part.localName, style = getComputedStyle(part);
        const fill = part.getAttribute('fill') || style.fill || 'black';
        if (tag !== 'line' && !['none', 'transparent'].includes(fill)) return true;
        const stroke = part.getAttribute('stroke') || style.stroke;
        if (stroke === 'none' || stroke === 'transparent') continue;
        if (typeof part.getScreenCTM !== 'function' || typeof part.getTotalLength !== 'function') return true;
        try {
          const matrix = part.getScreenCTM();
          if (!matrix) return true;
          const transform = p => ({x:matrix.a*p.x + matrix.c*p.y + matrix.e,
            y:matrix.b*p.x + matrix.d*p.y + matrix.f});
          const length = part.getTotalLength();
          const scale = Math.max(Math.hypot(matrix.a, matrix.b), Math.hypot(matrix.c, matrix.d));
          const steps = Math.max(1, Math.min(256, Math.ceil(length * scale / 4)));
          const padding = Math.max(.5, (parseFloat(style.strokeWidth || part.getAttribute('stroke-width')) || 1) * scale / 2);
          let previous = transform(part.getPointAtLength(0));
          for (let i = 1; i <= steps; i++) {
            const current = transform(part.getPointAtLength(length * i / steps));
            strokes.push([previous, current, padding]); previous = current;
          }
        } catch (_) { return true; }
      }
      return strokes.some(([a, b, padding]) => cv7991ZoomSegmentTouches(a, b, rect, padding));
    }

    function cv7991SetMediaZoomOutline(object, enabled) {
      if (!(object instanceof Element)) return;
      if (object.matches('.mvip-ordinary-word-mathtype-box, .mvip-ordinary-word-mathtype-visual, .mvip-ordinary-word-mathtype-raster')
          || object.closest('.mvip-ordinary-word-mathtype-box, .mvip-ordinary-word-mathtype-visual')) {
        enabled = false;
      }
      if (object.closest(cv7991PowerPointNoObjectZoomSelector)) enabled = false;
      const properties = {
        'outline-width':'1.5px', 'outline-style':'solid',
        'outline-color':object.matches(':focus-visible') ? 'rgb(37, 99, 235)' : 'rgb(147, 197, 253)',
        'outline-offset':'-1.5px'
      };
      if (enabled) {
        // Paint inside the object's existing box: a tight media panel can clip
        // an outside outline. Inline priority also survives native-media resets.
        for (const [key, value] of Object.entries(properties)) {
          if (object.style.getPropertyValue(key) !== value
              || object.style.getPropertyPriority(key) !== 'important') {
            object.style.setProperty(key, value, 'important');
          }
        }
        object.setAttribute('data-cv7991-zoom-outline', '1');
      } else if (object.hasAttribute('data-cv7991-zoom-outline')) {
        Object.keys(properties).forEach(key => object.style.removeProperty(key));
        object.removeAttribute('data-cv7991-zoom-outline');
      }
    }

    function cv7991ClearPowerPointZoomDecorations(root) {
      if (!(root instanceof Element)) return;
      const selector = '[data-word-image-zoom], [data-cv7991-zoom-outline], '
        + '.word-presentation-direct-zoom, .cv7991-presentation-image-frame, '
        + '.cv7991-media-zoom-object, .cv7991-shape-overlap, .cv7991-click-zoom-media-panel';
      const nodes = root.matches(selector) ? [root] : [];
      nodes.push(...root.querySelectorAll(selector));
      nodes.forEach(node => {
        const hadZoom = node.hasAttribute('data-word-image-zoom')
          || node.hasAttribute('data-cv7991-zoom-outline')
          || node.matches('.word-presentation-direct-zoom, .cv7991-presentation-image-frame');
        cv7991SetMediaZoomOutline(node, false);
        node.classList.remove('word-presentation-direct-zoom', 'cv7991-presentation-image-frame',
          'cv7991-media-zoom-object', 'cv7991-shape-overlap', 'cv7991-click-zoom-media-panel');
        node.removeAttribute('data-word-image-zoom');
        if (hadZoom) {
          if (node.getAttribute('role') === 'button') node.removeAttribute('role');
          if (node.getAttribute('tabindex') === '0') node.removeAttribute('tabindex');
          for (const key of ['title', 'aria-label']) {
            if (/phóng to/i.test(node.getAttribute(key) || '')) node.removeAttribute(key);
          }
        }
      });
    }

    function cv7991RefreshMediaZoomPolicy(root) {
      // Clear cached decorations as well as excluding new candidates. Never
      // remove the original PowerPoint borders, fills, SVG strokes or geometry.
      if (root instanceof Element) {
        if (root.closest(cv7991PowerPointNoObjectZoomSelector)) cv7991ClearPowerPointZoomDecorations(root);
        else root.querySelectorAll(cv7991PowerPointNoObjectZoomSelector).forEach(cv7991ClearPowerPointZoomDecorations);
      }
      const objects = cv7991MediaZoomObjects(root), blocked = new Set(), visible = new Set();
      const linked = new Set(objects.filter(object => object.closest('a[href]') || Array.from(object.children).some(child => child.matches('a.mvip-document-object-link'))));
      const parts = [];
      objects.forEach(object => {
        object.classList.add('cv7991-media-zoom-object');
        object.classList.remove('cv7991-presentation-image-frame');
        const rect = cv7991ZoomVisibleRect(object);
        if (!rect) return;
        visible.add(object);
        const isShape = object.matches(cv7991ZoomShapeSelector) || !!object.querySelector(cv7991ZoomShapeSelector);
        // Explicit source member boundaries avoid counting a cylinder's ellipse
        // and body paths as two overlapping Shapes.
        let members = [...object.querySelectorAll('[data-cv7991-drawing-part], svg[data-office-object-kind="shape"], [data-cv7991-pptx-kind]')];
        members = members.filter(node => !members.some(other => other !== node && other.contains(node)));
        if (members.length < 2) members = [object];
        members.forEach(element => {
          const memberRect = element === object ? rect : cv7991ZoomVisibleRect(element);
          if (!memberRect) return;
          parts.push({object, element, rect:memberRect, scope:object.closest(cv7991ZoomScopeSelector),
            shape:element === object ? isShape : element.matches(cv7991ZoomShapeSelector)
              || !!element.querySelector(cv7991ZoomShapeSelector)});
        });
      });
      for (let i = 0; i < parts.length; i++) {
        const a = parts[i];
        for (let j = i + 1; j < parts.length; j++) {
          const b = parts[j];
          if (a.scope !== b.scope || !(a.shape || b.shape)
              || !cv7991ZoomRectTouches(a.rect, b.rect)) continue;
          if (a.shape && !cv7991ZoomLineTouches(a.element, b.rect)) continue;
          if (b.shape && !cv7991ZoomLineTouches(b.element, a.rect)) continue;
          blocked.add(a.object); blocked.add(b.object);
        }
      }
      objects.forEach(object => {
        object.classList.add('cv7991-media-zoom-object');
        object.classList.toggle('cv7991-shape-overlap', blocked.has(object));
        // Remove earlier, question-wide state and stale zoom affordances.
        if (blocked.has(object) || linked.has(object) || !visible.has(object)) {
          cv7991SetMediaZoomOutline(object, false);
          const nodes = [object, ...object.querySelectorAll('[data-word-image-zoom]')];
          nodes.forEach(node => {
            cv7991SetMediaZoomOutline(node, false);
            node.classList.remove('word-presentation-direct-zoom', 'cv7991-presentation-image-frame');
            node.removeAttribute('data-word-image-zoom');
            if (node.getAttribute('role') === 'button') node.removeAttribute('role');
            if (node.getAttribute('tabindex') === '0') node.removeAttribute('tabindex');
            for (const key of ['title', 'aria-label']) {
              if (/phóng to/i.test(node.getAttribute(key) || '')) node.removeAttribute(key);
            }
          });
        }
      });
      if (root instanceof Element) {
        root.classList.remove('cv7991-question-has-shapes');
        root.querySelectorAll('.cv7991-question-has-shapes').forEach(node => node.classList.remove('cv7991-question-has-shapes'));
      }
      return {objects, blocked, visible, linked};
    }

    function cv7991CanZoomObject(element, policy = null) {
      const object = cv7991MediaZoomObject(element);
      if (!object) return false;
      const scope = object.closest(cv7991ZoomScopeSelector);
      if (!scope) return false;
      const state = policy || cv7991RefreshMediaZoomPolicy(scope);
      return state.visible.has(object) && !state.blocked.has(object) && !(state.linked && state.linked.has(object));
    }


    /* Multi-object prompts use one source canvas. Never move their objects to
       the separate media panel or scale a picture/table independently of text. */
    function cv7991SourcePromptHtml(value, context = {}) {
      if (context.cv7991SourceFragment) return '';
      const text = String(value || '');
      const mediaTokens = Array.from(text.matchAll(/\[\[CV7991_(IMG|TBL):([^\]]+)\]\]/g));
      const media = mediaTokens.map((match) => ({
        kind: match[1],
        value: ((match[1] === 'IMG' ? context.imageMap : context.tableMap) || {})[match[2]]
      })).filter((entry) => entry.value && (entry.kind === 'TBL' || !cv7991PresenterImageIsFormula(entry.value)));
      // Giữ lưới cột, xuống dòng và cỡ chữ gốc cho cả MỘT bảng Word.
      // Một ảnh/hình vẽ đơn vẫn dùng quy tắc phóng to nhỏ/lớn hiện có.
      const singleSourceTable = media.length === 1 && media[0].kind === 'TBL'
        && Array.isArray(media[0].value.columnWidths)
        && media[0].value.columnWidths.some((width) => Number(width) > 0);
      if (media.length < 2 && !singleSourceTable) return '';
      const hasParagraphAnchor = media.some(({ value }) => value.sourceAnchor
        && value.sourceAnchor.vertical === 'paragraph'
        && /^(column|paragraph|character|margin|page)$/.test(value.sourceAnchor.horizontal)
        && /^(none|square)$/.test(value.sourceAnchor.wrap));
      const meta = media.map((entry) => entry.value).find((item) => Number(item.sourceTextWidthPx) > 0) || {};
      const width = Number(meta.sourceTextWidthPx) || 640;
      const font = Number(meta.sourceFontPx) || 16;
      const paragraphs = Array.isArray(meta.sourceParagraphs) ? meta.sourceParagraphs : [];
      const normalize = (line) => String(line || '')
        .replace(/\[\[CV7991_(?:ANSWER[^\]]*|FMT_U_START|FMT_U_END)\]\]/g, '')
        .replace(/^(?:Câu|Cau)\s+\d+(?:\([^)]*\))?\s*[.:：]?\s*/i, '')
        .replace(/\s+/g, ' ').trim();
      const fragmentContext = Object.assign({}, context, { cv7991SourceFragment: true });
      // Rebuild the original paragraph sequence only when it matches this prompt.
      // This keeps synthetic parser line breaks from becoming drawing anchor rows.
      let sourceRows = null;
      if (hasParagraphAnchor && paragraphs.some((entry) => 'sourceText' in entry)) {
        const wanted = normalize(text);
        let prefix = '';
        for (let i = 0; i < paragraphs.length; i += 1) {
          prefix = normalize(`${prefix} ${normalize(paragraphs[i].text)}`);
          if (prefix === wanted) {
            let end = i + 1;
            while (end < paragraphs.length && !String(paragraphs[end].text || '').trim()) end += 1;
            const prefixRows = Array.isArray(meta.sourcePrefixParagraphs) ? meta.sourcePrefixParagraphs : [];
            sourceRows = [...prefixRows, ...paragraphs.slice(0, end)].map((entry, sourceIndex) => ({
              entry, sourceIndex,
              line: String(entry.sourceText == null ? entry.text : entry.sourceText)
                .replace(/^(?:Câu|Cau)\s+\d+(?:\([^)]*\))?\s*[.:：]?\s*/i, '')
            }));
            break;
          }
          if (!wanted.startsWith(prefix)) break;
        }
      }
      const rows = sourceRows || text.replace(/\r\n?/g, '\n').split('\n').map((line) => ({
        line, entry: paragraphs.find((item) => normalize(item.text) === normalize(line))
      }));
      const body = rows.map(({ line, entry, sourceIndex }, index) => {
        const fmt = entry && (sourceRows ? entry.anchorFormat || entry.format : entry.format) || {};
        const css = [];
        const number = (n) => Math.round((Number(n) || 0) * 1000) / 1000;
        if (Number(fmt.fontSizePx) > 0) css.push(`font-size:${number(fmt.fontSizePx)}px`);
        if (fmt.align) css.push(`text-align:${fmt.align === 'both' ? 'justify' : fmt.align}`);
        css.push(`margin:${number(fmt.beforePx)}px ${number(fmt.rightPx)}px ${number(fmt.afterPx)}px ${number(fmt.leftPx)}px`);
        css.push(`text-indent:${number(fmt.firstLinePx)}px`);
        if (fmt.line > 0) css.push(`line-height:${fmt.lineRule === 'auto' ? number(fmt.line / 240) : `${number(fmt.line / 15)}px`}`);
        const inline = !sourceRows && index === 0 && !/^\s*\[\[CV7991_(?:IMG|TBL):/.test(line) ? ' is-source-first-inline' : '';
        const headingMatch = sourceRows && String(entry.sourceText || entry.text || '')
          .match(/^((?:Câu|Cau)[ \t]+\d+(?:\([^)]*\))?(?:[ \t]*[.:：])?)([ \t]*)/i);
        const headingRun = headingMatch && (entry.runs || []).find((run) => String(run.text || '').trim());
        const headingData = headingMatch ? {
          format: headingRun && headingRun.format || {},
          gap: headingMatch[2], punctuation: (headingMatch[1].match(/[.:：]$/) || [''])[0]
        } : null;
        const headingAttr = headingData
          ? ` data-cv-source-question-heading="1" data-cv-source-heading-data="${escapeHtml(JSON.stringify(headingData))}"` : '';
        const sourceAttr = sourceRows ? ` data-cv-source-paragraph-index="${sourceIndex}"${headingAttr}${fmt.line > 0 && fmt.lineRule === 'auto' ? ` data-cv-source-auto-line="${fmt.line / 240}"` : ''}` : '';
        let content = line ? cv7991SourceStyledParagraph(cv7991PresenterHtmlFromText(line, fragmentContext), entry && entry.runs) : '';
        if (sourceRows) {
          const hasFlowContent = line.replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (token, id) => {
            const anchor = (context.imageMap || {})[id]?.sourceAnchor;
            return anchor && anchor.vertical === 'paragraph'
              && /^(column|paragraph|character|margin|page)$/.test(anchor.horizontal)
              && /^(none|square)$/.test(anchor.wrap) ? '' : token;
          }).trim();
          if (!hasFlowContent) content += '<br>';
        } else if (!content) content = '<br>';
        return `<div class="cv7991-source-paragraph${inline}"${sourceAttr} style="${escapeHtml(css.join(';'))}">${content}</div>`;
      }).join('');
      return `<div class="cv7991-source-prompt"${sourceRows ? ' data-cv-source-flow="paragraphs"' : ''} data-cv-source-text-width="${width}" data-cv-source-page-width="${Number(meta.sourcePageWidthPx) || width}" data-cv-source-page-left="${Number(meta.sourcePageLeftPx) || 0}" data-cv-source-font="${font}">${body}</div>`;
    }

    function cv7991SourceStyledParagraph(html, runs) {
      if (!Array.isArray(runs) || !runs.length) return html;
      const host = document.createElement('div');
      host.innerHTML = html;
      let cursor = 0;
      runs.forEach((run) => {
        const raw = String(run.text || '');
        const text = raw.replace(/^(?:Câu|Cau)\s+\d+(?:\([^)]*\))?\s*[.:：]?\s*/i, '');
        if (!text) return;
        const index = host.textContent.indexOf(text, cursor);
        if (index < 0) return;
        cursor = index + text.length;
        const format = run.format || {};
        const span = document.createElement('span');
        if (Number(format.fontSizePt) > 0) span.style.fontSize = `${Number(format.fontSizePt) * 96 / 72}px`;
        if (format.fontFamily) span.style.fontFamily = format.fontFamily;
        if (typeof format.bold === 'boolean') span.style.fontWeight = format.bold ? '700' : '400';
        if (typeof format.italic === 'boolean') span.style.fontStyle = format.italic ? 'italic' : 'normal';
        if (format.underline) span.style.textDecoration = 'underline';
        if (/^#[0-9a-f]{6}$/i.test(format.color || '')) span.style.color = format.color;
        if (!span.getAttribute('style')) return;
        const walker = document.createTreeWalker(host, NodeFilter.SHOW_TEXT);
        const range = document.createRange();
        let offset = 0, started = false, ended = false;
        while (walker.nextNode()) {
          const node = walker.currentNode, end = offset + node.nodeValue.length;
          if (!started && index < end) { range.setStart(node, index - offset); started = true; }
          if (started && cursor <= end) { range.setEnd(node, cursor - offset); ended = true; break; }
          offset = end;
        }
        if (started && ended) {
          span.appendChild(range.extractContents());
          range.insertNode(span);
        }
      });
      return host.innerHTML;
    }

    const cv7991SourceQuestionState = new WeakMap();
    function cv7991SourceQuestionObjects(prompt) {
      if (!(prompt instanceof Element)) return [];
      const elements = Array.from(prompt.querySelectorAll(
        'img, table, svg, canvas, .single-exam-inline-vector, .single-exam-word-group-figure, '
        + '.mvip-office-vector-shape, .mvip-office-vector-group, .mvip-office-object'
      )).filter((element) => !element.closest(
        '.single-exam-inline-formula, .single-exam-mathjax-svg, mjx-container, '
        + '.cv7991-ordinary-equation, .word-presentation-formula-tail'
      ));
      return elements.filter((element) => !elements.some((other) => other !== element && other.contains(element)));
    }

    function cv7991PrepareSourceQuestionLayout(targetCard) {
      if (!(targetCard instanceof HTMLElement)) return false;
      const shell = targetCard.querySelector('.word-presentation-content-shell');
      const prompt = shell && shell.querySelector('.word-presentation-question-prompt');
      if (!shell || !prompt) return false;
      let state = cv7991SourceQuestionState.get(shell);
      const sourceObjects = cv7991SourceQuestionObjects(prompt);
      const singleSourceTable = sourceObjects.length === 1
        && sourceObjects[0].matches('table[data-cv-source-width]')
        && Number(sourceObjects[0].dataset.cvSourceWidth) > 0;
      if (!state && sourceObjects.length < 2 && !singleSourceTable) {
        targetCard.classList.remove('cv7991-source-question-layout');
        return false;
      }
      targetCard.classList.remove('has-presentation-media', 'cv7991-multiple-question-media',
        'cv7991-word-source-media-flow', 'cv7991-bottom-right-media-flow',
        'cv7991-bottom-right-prompt-flow', 'wp-all-view-has-media', 'wp-all-view-media-without-items');
      targetCard.classList.add('cv7991-source-question-layout');
      const panel = shell.querySelector('.word-presentation-media-panel');
      if (panel) panel.hidden = true;
      if (!state) {
        const meta = prompt.querySelector('.cv7991-source-prompt');
        state = {
          width: Number(meta && meta.dataset.cvSourceTextWidth) || 640,
          font: Number(meta && meta.dataset.cvSourceFont) || 16
        };
        cv7991SourceQuestionState.set(shell, state);
        const size = (element, prop, value) => {
          if (Number.isFinite(value) && value > 0) element.style.setProperty(prop, `${value}px`, 'important');
        };
        Array.from(shell.querySelectorAll('.single-exam-inline-media, .single-exam-inline-vector, .single-exam-word-group-figure, canvas')).forEach((element) => {
          const formula = element.classList.contains('single-exam-inline-formula');
          const prefix = formula ? '--cv-formula-base-' : '--cv-presenter-base-';
          size(element, 'width', parseFloat(element.style.getPropertyValue(prefix + 'width')) || parseFloat(element.style.width));
          size(element, 'height', parseFloat(element.style.getPropertyValue(prefix + 'height')) || parseFloat(element.style.height));
        });
        Array.from(shell.querySelectorAll('table[data-cv-source-width]')).forEach((table) => {
          size(table, 'width', Number(table.dataset.cvSourceWidth));
          table.style.setProperty('margin-left', `${Number(table.dataset.cvSourceIndent) || 0}px`, 'important');
        });
        Array.from(shell.querySelectorAll('tr[data-cv-source-row-height]')).forEach((row) => size(row, 'height', Number(row.dataset.cvSourceRowHeight)));
        Array.from(shell.querySelectorAll('[data-cv-source-font-px]')).forEach((element) => {
          size(element, 'font-size', Number(element.dataset.cvSourceFontPx));
        });
        const sourceFlow = prompt.querySelector('[data-cv-source-flow="paragraphs"]');
        if (sourceFlow) {
          prompt.style.setProperty('display', 'block', 'important');
          const line = prompt.closest('.word-presentation-question-line');
          const label = line && Array.from(line.children).find((child) => child.classList.contains('word-presentation-question-label'));
          const first = sourceFlow.querySelector('[data-cv-source-question-heading]') || sourceFlow.querySelector('.cv7991-source-paragraph');
          if (label && first) {
            let heading = null;
            try { heading = JSON.parse(first.dataset.cvSourceHeadingData || 'null'); } catch (_) {}
            if (heading) {
              // The UI's bold label and added margin must not change the source
              // line's advance: floating drawings use Word's absolute coordinates.
              const format = heading.format || {};
              label.dataset.cvSourceHeadingMetrics = '1';
              label.style.setProperty('font-weight', format.bold === true ? '700' : (format.bold === false ? '400' : 'inherit'), 'important');
              label.style.setProperty('font-style', format.italic === true ? 'italic' : (format.italic === false ? 'normal' : 'inherit'), 'important');
              label.style.setProperty('font-size', Number(format.fontSizePt) > 0 ? `${Number(format.fontSizePt) * 96 / 72}px` : 'inherit', 'important');
              label.style.setProperty('font-family', format.fontFamily || 'inherit', 'important');
              if (typeof heading.punctuation === 'string' && !label.children.length) {
                label.textContent = label.textContent.replace(/[.:：]\s*$/, heading.punctuation);
              }
            }
            first.prepend(label, document.createTextNode(heading ? heading.gap : ' '));
          }
        }
        cv7991PlaceQuestionSourceAnchors(shell);
        if (sourceFlow) {
          sourceFlow.classList.toggle('cv7991-source-wrapped-text',
            !!sourceFlow.querySelector('[data-cv7991-source-wrap="square"]'));
        }
        Array.from(shell.querySelectorAll('img')).forEach((img) => {
          if (img.complete && img.naturalWidth > 0) return;
          const refresh = () => {
            if (!targetCard.isConnected) return;
            if (targetCard.classList.contains('word-presentation-all-question')) cv7991FitSourceAllSection(targetCard);
            else {
              const layer = targetCard.parentElement;
              cv7991FitSourceQuestion(layer && layer.parentElement, layer, targetCard);
            }
          };
          img.addEventListener('load', refresh, { once: true });
          img.addEventListener('error', refresh, { once: true });
        });
      }
      targetCard.style.setProperty('--cv-source-font', `${state.font}px`);
      targetCard.style.setProperty('--cv-source-card-width', `${state.width + 48}px`);
      return true;
    }

    function cv7991PlaceQuestionSourceAnchors(shell) {
      Array.from(shell.querySelectorAll('[data-cv-source-anchor]')).forEach((element) => {
        let anchor;
        try { anchor = JSON.parse(element.dataset.cvSourceAnchor); } catch (_) { return; }
        if (!anchor || !/^(paragraph|line)$/.test(anchor.vertical)
            || !/^(column|paragraph|character|margin|page)$/.test(anchor.horizontal)) return;
        const paragraph = element.closest('.cv7991-source-paragraph');
        if (!paragraph) return;
        const size = (name) => parseFloat(element.style.getPropertyValue(name)) || 0;
        const set = (values) => Object.entries(values).forEach(([name, value]) => element.style.setProperty(name, value, 'important'));
        const sourceFlow = paragraph.closest('[data-cv-source-flow="paragraphs"]');
        if (sourceFlow && /^(none|square)$/.test(anchor.wrap)) {
          // A floating drawing does not consume a row. Its signed Y offset is
          // relative to its original paragraph, not to the preceding drawing.
          const margin = parseFloat(paragraph.style.marginLeft) || 0;
          const rightMargin = parseFloat(paragraph.style.marginRight) || 0;
          const sourceWidth = Number(sourceFlow.dataset.cvSourceTextWidth) || 640;
          const pageReference = anchor.horizontal === 'page';
          const referenceWidth = pageReference
            ? Number(sourceFlow.dataset.cvSourcePageWidth) || sourceWidth
            : (anchor.horizontal === 'margin' ? sourceWidth : sourceWidth - margin - rightMargin);
          let x = Number(anchor.x) || 0;
          if (anchor.align === 'center') x = (referenceWidth - size('width')) / 2;
          else if (anchor.align === 'right') x = referenceWidth - size('width');
          else if (anchor.align === 'left') x = 0;
          if (pageReference) x -= (Number(sourceFlow.dataset.cvSourcePageLeft) || 0) + margin;
          else if (anchor.horizontal === 'margin') x -= margin;
          set({ position: 'absolute', float: 'none', left: `${x}px`, top: `${Number(anchor.y) || 0}px`,
            right: 'auto', bottom: 'auto', transform: 'none', 'vertical-align': 'baseline',
            'z-index': anchor.behind ? '-1' : '1' });
          element.dataset.cv7991SourceWrap = anchor.wrap || 'none';
          element.dataset.cv7991SourcePositioned = '1';
          return;
        }
        if (anchor.horizontal === 'margin') {
          // Word aligns this drawing within the page's text area, not at the
          // beginning of its run. That area is the fixed-width source paragraph.
          // Keep the reconstructed paragraph's vertical flow and move the whole
          // drawing horizontally; its native paths, labels and proportions stay intact.
          const centered = anchor.align === 'center';
          const rightAligned = anchor.align === 'right';
          const x = Number.isFinite(Number(anchor.x)) ? Number(anchor.x) : 0;
          set({
            position: 'relative',
            left: centered ? '50%' : (rightAligned ? '100%' : `${x}px`),
            right: 'auto',
            transform: centered ? 'translateX(-50%)' : (rightAligned ? 'translateX(-100%)' : 'none')
          });
          element.dataset.cv7991SourceMarginAnchor = centered ? 'center' : (rightAligned ? 'right' : 'offset');
          return;
        }
        if (anchor.wrap === 'square') {
          set({ float: anchor.align === 'right' ? 'right' : 'left',
            'margin-left': `${Math.max(0, anchor.x) + anchor.leftPx}px`,
            'margin-right': `${anchor.rightPx}px`, 'margin-top': `${Math.max(0, anchor.y) + anchor.topPx}px`,
            'margin-bottom': `${anchor.bottomPx}px` });
        } else if (anchor.wrap === 'top-bottom') {
          set({ display: 'block', 'margin-left': `${Math.max(0, anchor.x)}px`,
            'margin-top': `${Math.max(0, anchor.y) + anchor.topPx}px`, 'margin-bottom': `${anchor.bottomPx}px` });
        } else {
          // An overlay does not reserve a new row; text and other drawings keep their coordinates.
          const first = paragraph.classList.contains('is-source-first-inline');
          const parent = first ? paragraph.closest('.word-presentation-question-line') : paragraph;
          if (first) paragraph.style.position = 'static';
          parent.style.position = 'relative';
          const left = anchor.align === 'center' ? '50%' : (anchor.align === 'right' ? 'auto' : `${anchor.x}px`);
          set({ position:'absolute', left, top:`${anchor.y}px`,
            right:anchor.align === 'right' ? '0px' : 'auto',
            transform:anchor.align === 'center' ? 'translateX(-50%)' : 'none',
            'z-index':anchor.behind ? '0' : '1' });
          // Retain the complete visible extent when the anchor is the paragraph's only content.
          if (!paragraph.textContent.trim()) paragraph.style.minHeight = `${Math.max(0, anchor.y) + size('height')}px`;
        }
      });
    }

    function cv7991WrapSourceParagraphText(prompt, options = {}) {
      const range = document.createRange();
      if (typeof range.getBoundingClientRect !== 'function') return;
      prompt.querySelectorAll('[data-cv-source-wrap-spacer]').forEach((spacer) => spacer.remove());
      prompt.normalize();
      const drawings = options.drawings || Array.from(prompt.querySelectorAll('[data-cv7991-source-wrap="square"]'));
      if (!drawings.length) return;
      const width = Number(options.width) || Number(prompt.dataset.cvSourceTextWidth) || 640;
      const promptRect = prompt.getBoundingClientRect();
      const scale = promptRect.width / width;
      if (!(scale > 0)) return;
      // Insert only layout spacers at word boundaries. Native text stays editable
      // and a central floating picture can leave room for text on BOTH sides.
      for (let pass = 0; pass < 200; pass += 1) {
        const boxes = drawings.map((drawing) => {
          const rect = drawing.getBoundingClientRect();
          let anchor = {};
          try { anchor = JSON.parse(drawing.dataset.cvSourceAnchor); } catch (_) {}
          return { left: rect.left - (anchor.leftPx || 0) * scale,
            right: rect.right + (anchor.rightPx || 0) * scale,
            top: rect.top - (anchor.topPx || 0) * scale,
            bottom: rect.bottom + (anchor.bottomPx || 0) * scale };
        });
        const walker = document.createTreeWalker(prompt, NodeFilter.SHOW_TEXT);
        let collision = null;
        while (!collision && walker.nextNode()) {
          const node = walker.currentNode;
          if (node.parentElement.closest('[data-cv-source-anchor], [data-cv-source-wrap-spacer], .mvip-office-inline-object, .mvip-office-object, svg')) continue;
          const table = node.parentElement.closest('table');
          if (table && prompt.contains(table)) continue;
          for (const match of node.nodeValue.matchAll(/\S+/g)) {
            range.setStart(node, match.index);
            range.setEnd(node, match.index + match[0].length);
            const rect = range.getBoundingClientRect();
            if (!rect.width || !rect.height) continue;
            const box = boxes.find((box) => rect.left < box.right - .01 && rect.right > box.left + .01
              && rect.top < box.bottom - .5 && rect.bottom > box.top + .5);
            if (box) {
              collision = { node, offset: match.index, width: (box.right - rect.left) / scale,
                breakLine: box.right + rect.width > promptRect.left + promptRect.width };
              break;
            }
          }
        }
        if (!collision || collision.width <= 0 || collision.width >= width) break;
        const spacer = document.createElement(collision.breakLine ? 'br' : 'span');
        spacer.dataset.cvSourceWrapSpacer = '1';
        spacer.setAttribute('aria-hidden', 'true');
        if (!collision.breakLine) spacer.style.cssText = `display:inline-block!important;width:${collision.width}px!important;height:0!important;padding:0!important;margin:0!important;border:0!important`;
        range.setStart(collision.node, collision.offset);
        range.collapse(true);
        range.insertNode(spacer);
      }
    }

    function cv7991RefreshSourceAnchorExtent(targetCard) {
      Array.from(targetCard.querySelectorAll('[data-cv-source-flow="paragraphs"]')).forEach((prompt) => {
        // Word's automatic line spacing multiplies the font's natural line box,
        // not its em size. Measure without viewport scaling (offsetHeight).
        Array.from(prompt.querySelectorAll('[data-cv-source-auto-line]')).forEach((paragraph) => {
          if (paragraph.dataset.cv7991SourceLineMeasured === '1') return;
          const probe = document.createElement('span');
          probe.textContent = 'Ag';
          probe.className = 'cv7991-source-line-probe';
          probe.style.cssText = 'position:absolute!important;visibility:hidden!important;display:block!important;font:inherit!important;line-height:normal!important;padding:0!important;border:0!important;margin:0!important;white-space:nowrap!important';
          paragraph.appendChild(probe);
          const height = probe.offsetHeight;
          probe.remove();
          if (height > 0) {
            paragraph.style.lineHeight = `${height * Number(paragraph.dataset.cvSourceAutoLine)}px`;
            paragraph.dataset.cv7991SourceLineMeasured = '1';
          }
        });
        if (!prompt.offsetHeight) return;
        cv7991WrapSourceParagraphText(prompt);
        const oldPadding = parseFloat(prompt.style.paddingBottom) || 0;
        const flowHeight = prompt.offsetHeight - oldPadding;
        let bottom = flowHeight;
        Array.from(prompt.querySelectorAll('[data-cv7991-source-positioned="1"]')).forEach((element) => {
          let top = 0, node = element;
          while (node && node !== prompt) { top += node.offsetTop; node = node.offsetParent; }
          if (node === prompt) bottom = Math.max(bottom, top + element.offsetHeight);
        });
        // Reserve overflow once for the whole prompt, never between anchor paragraphs.
        prompt.style.setProperty('padding-bottom', `${Math.max(0, bottom - flowHeight)}px`, 'important');
      });
    }

    function cv7991SourceQuestionSize(targetCard) {
      cv7991RefreshSourceAnchorExtent(targetCard);
      const shell = targetCard.querySelector('.word-presentation-content-shell');
      const state = cv7991SourceQuestionState.get(shell) || { width: 640, font: 16 };
      // Read untransformed dimensions. Source line wrapping never depends on viewport size.
      const width = Math.max(state.width + 48, targetCard.scrollWidth, targetCard.offsetWidth);
      const height = Math.max(1, targetCard.scrollHeight, targetCard.offsetHeight);
      return { width, height, font: state.font };
    }

    function cv7991FitSourceQuestion(viewport, fitLayer, targetCard) {
      if (!(targetCard instanceof HTMLElement) || !targetCard.classList.contains('cv7991-source-question-layout')) return false;
      if (!(viewport instanceof HTMLElement) || !(fitLayer instanceof HTMLElement)) return false;
      if (!viewport.clientWidth || !viewport.clientHeight) return true;
      const oldScale = Number(targetCard.dataset.cv7991ViewportScale) || 1;
      const logicalScroll = viewport.scrollTop / oldScale;
      const set = (element, values) => Object.entries(values).forEach(([key, value]) => element.style.setProperty(key, value, 'important'));
      viewport.classList.remove('cv7991-vertical-scroll', 'cv7991-horizontal-scroll');
      fitLayer.classList.remove('cv7991-proportional-canvas');
      set(targetCard, { position: 'absolute', left: '0', top: '0', margin: '0', 'transform-origin': 'top left', transform: 'none' });
      const size = cv7991SourceQuestionSize(targetCard);
      const availableWidth = Math.max(1, viewport.clientWidth - 24);
      const availableHeight = Math.max(1, viewport.clientHeight - 24);
      const widthScale = availableWidth / size.width;
      const fitScale = Math.min(widthScale, availableHeight / size.height, 3);
      // Very long questions scroll as a whole rather than making the text illegible.
      const scale = Math.max(fitScale, Math.min(widthScale, 14 / size.font));
      const scaledWidth = size.width * scale;
      const scaledHeight = size.height * scale;
      set(viewport, { 'overflow-y': scaledHeight > availableHeight + 1 ? 'auto' : 'hidden', 'overflow-x': 'hidden' });
      viewport.classList.toggle('cv7991-source-scroll', scaledHeight > availableHeight + 1);
      set(fitLayer, {
        position: 'relative', left: '0', top: '0', transform: 'none',
        width: `${scaledWidth}px`, height: `${scaledHeight}px`,
        margin: `${Math.max(12, (viewport.clientHeight - scaledHeight) / 2)}px auto 12px`,
        'min-height': '0', 'transform-origin': 'top left'
      });
      set(targetCard, { transform: `scale(${scale})` });
      targetCard.dataset.cv7991ViewportScale = String(scale);
      fitLayer.dataset.scale = String(scale);
      viewport.scrollTop = logicalScroll * scale;
      return true;
    }

    function cv7991FitSourceAllSection(section) {
      if (!(section instanceof HTMLElement) || !section.classList.contains('cv7991-source-question-layout')) return;
      let stage = section.parentElement;
      if (!stage.classList.contains('cv7991-source-question-stage')) {
        stage = document.createElement('div');
        stage.className = 'cv7991-source-question-stage';
        section.before(stage);
        stage.appendChild(section);
      }
      const availableWidth = stage.parentElement.clientWidth || stage.clientWidth;
      if (!availableWidth) return;
      section.style.setProperty('transform', 'none', 'important');
      const size = cv7991SourceQuestionSize(section);
      const scale = Math.min(3, availableWidth / size.width);
      stage.style.height = `${size.height * scale}px`;
      section.style.setProperty('transform', `scale(${scale})`, 'important');
      section.dataset.cv7991ViewportScale = String(scale);
    }

    function cv7991PresenterHtmlFromText(value, context = {}) {
      if (context.cv7991PreserveSourcePrompt && !context.cv7991SourceFragment) {
        const sourcePrompt = cv7991SourcePromptHtml(value, context);
        if (sourcePrompt) return sourcePrompt;
      }
      /* Không nén lại từng mảnh ở đây: wpRich có thể chia văn bản ngay tại token
         công thức; nếu xóa xuống dòng đầu/cuối của từng mảnh thì câu sau công thức
         sẽ bị dính vào câu trước. Các đầu vào hoàn chỉnh đã được nén trước bởi
         cv7991CleanPresenterText hoặc wpRich. */
      const text = cv7991NormalizeLegacyWordSymbolText(String(value || ''));
      if (!text) return '';
      const imageMap = (context && context.imageMap) || {};
      const tableMap = (context && context.tableMap) || {};
      const equationMap = (context && context.equationMap) || {};
      const linkMap = (context && context.linkMap) || {};
      const tokenRe = /(\[\[CV7991_IMG:[^\]]+\]\]|\[\[CV7991_TBL:[^\]]+\]\]|\[\[CV7991_OMML:[^\]]+\]\]|\[\[CV7991_LINK:[^\]]+\]\]|\[\[CV7991_FMT_U_START\]\]|\[\[CV7991_FMT_U_END\]\])/g;
      const parts = text.split(tokenRe).filter((part) => part !== '');
      return parts.map((part) => {
        if (part === cv7991UnderlineStartToken()) return '<span class="cv7991-source-underline">';
        if (part === cv7991UnderlineEndToken()) return '</span>';
        let match = part.match(/^\[\[CV7991_LINK:([^\]]+)\]\]$/);
        if (match) {
          const link = linkMap[String(match[1] || '').trim()];
          if (!link) return '';
          const label = cv7991PresenterHtmlFromText(link.text || '', Object.assign({}, context, { linkMap: {} }));
          const href = cv7991SafeDocumentLinkUrl(link.href);
          return href ? `<a class="cv7991-document-link" href="${escapeHtml(href)}" target="_blank" rel="noopener noreferrer">${label}</a>` : label;
        }
        match = part.match(/^\[\[CV7991_IMG:([^\]]+)\]\]$/);
        if (match) {
          const image = imageMap && imageMap[String(match[1] || '').trim()];
          if (image && image.embeddedVideo && window.mvipWordVideo) return window.mvipWordVideo.buttonHtml(image.embeddedVideo);
          if (image && image.wordGroupData) return cv7991PresenterWordGroupHtml(image, context);

          /* Nhiều tài liệu cũ lưu các đáp án 1, 2, 3, 4 thành bốn đối tượng
             MathType/OLE riêng. Dựng lại chúng như ảnh làm chữ số bị quá nhỏ,
             lại dễ bị cắt bởi cơ chế căn baseline. Với đúng một chữ số, dùng
             chữ Times New Roman kế thừa trực tiếp: kích thước, màu và độ đậm
             sẽ luôn đồng bộ với phần nội dung phương án. */
          let singleNumberText = '';
          if (image && typeof cv7991MathTypeImageIsSingleNumber === 'function') {
            try {
              if (cv7991MathTypeImageIsSingleNumber(image)) {
                singleNumberText = cv7991NormalizeSingleNumberMathTypeTex(
                  image.presenterTex || image.embeddedTex || ''
                );
              }
            } catch (_) {}
          }
          if (/^[0-9]$/.test(singleNumberText)) {
            return `<span class="cv7991-presenter-single-number">${escapeHtml(singleNumberText)}</span>`;
          }

          if (!image || !image.data) return '<span class="single-exam-inline-fallback">[Không thể tải được hình]</span>';
          const isMathTypeFormula = cv7991PresenterImageIsFormula(image);
          if (isMathTypeFormula && typeof cv7991ExtractMathTypeTex === 'function') {
            try { cv7991ExtractMathTypeTex(image); } catch (_) {}
          }
          const src = cv7991PresenterImageDataUrl(image);
          const inlineStyle = cv7991PresenterImageInlineStyle(image);
          if (!src && !String(image.presenterSvgMarkup || '').trim()
              && !isMathTypeFormula && !cv7991CanBrowserDisplayPresenterImage(image)) {
            return '<span class="single-exam-inline-fallback">[Không thể tải được hình]</span>';
          }
          /* Riêng “Trình chiếu câu hỏi Word thành câu hỏi tương tác” không dùng
             ảnh raster của MathType. Dựng trực tiếp từ MTEF/TeX để công thức
             tiếp tục là công thức, cỡ chữ tăng/giảm cùng nội dung câu hỏi. */
          if (isMathTypeFormula
              && context && context.cv7991InteractiveQuestionMode
              && typeof window.cv7991InteractiveMathTypeFragmentForPresentation === 'function') {
            try {
              const liveFragment = window.cv7991InteractiveMathTypeFragmentForPresentation({
                relId: String(match[1] || '').trim(),
                widthPt: Math.max(0, Number(image.displayWidthPt) || 0),
                heightPt: Math.max(0, Number(image.displayHeightPt) || 0),
                wordPositionHalfPoints: Number(image.wordPositionHalfPoints) || 0,
              }, imageMap);
              if (liveFragment) {
                const liveHost = document.createElement('span');
                liveHost.appendChild(liveFragment);
                const liveHtml = String(liveHost.innerHTML || '').trim();
                if (liveHtml) return liveHtml;
              }
            } catch (_) {}
          }

          /* Các chế độ còn lại vẫn dùng bộ MathType của Word thông thường. */
          if (isMathTypeFormula
              && !(context && context.cv7991InteractiveQuestionMode)
              && !(context && context.cv7991SkipOrdinaryMathTypeRules)
              && typeof window.cv7991OrdinaryMathTypeFragmentForPresentation === 'function') {
            try {
              const ordinaryFragment = window.cv7991OrdinaryMathTypeFragmentForPresentation({
                relId: String(match[1] || '').trim(),
                widthPt: Math.max(0, Number(image.displayWidthPt) || 0),
                heightPt: Math.max(0, Number(image.displayHeightPt) || 0),
                wordPositionHalfPoints: Number(image.wordPositionHalfPoints) || 0,
              }, imageMap);
              if (ordinaryFragment) {
                const ordinaryHost = document.createElement('span');
                ordinaryHost.appendChild(ordinaryFragment);
                const ordinaryHtml = String(ordinaryHost.innerHTML || '').trim();
                if (ordinaryHtml) return ordinaryHtml;
              }
            } catch (_) {}
          }
          const formulaClass = isMathTypeFormula
            ? ` single-exam-inline-formula${cv7991MathTypeImageHasFractionBar(image) ? ' cv-mathtype-fraction-bar' : ''}`
            : '';
          const wordFlowClass = cv7991PresenterImageKeepsWordFlow(image)
            ? ' cv7991-word-small-flow-image' : '';
          if (image.presenterMimeType === 'image/svg+xml' && String(image.presenterSvgMarkup || '').trim()) return `<span class="single-exam-inline-vector${formulaClass}${wordFlowClass}"${inlineStyle}>${String(image.presenterSvgMarkup || '')}</span>`;
          if (src) return `<img class="single-exam-inline-media${formulaClass}${wordFlowClass}" src="${src}"${inlineStyle} alt="Hình minh họa">`;
          if (String(image.presenterSvgMarkup || '').trim()) return `<span class="single-exam-inline-vector${formulaClass}${wordFlowClass}"${inlineStyle}>${String(image.presenterSvgMarkup || '')}</span>`;
          return '<span class="single-exam-inline-fallback">[Không thể tải được hình]</span>';
        }
        match = part.match(/^\[\[CV7991_TBL:([^\]]+)\]\]$/);
        if (match) {
          const tableData = tableMap && tableMap[String(match[1] || '').trim()];
          return cv7991PresenterTableHtml(tableData, context);
        }
        match = part.match(/^\[\[CV7991_OMML:([^\]]+)\]\]$/);
        if (match) {
          const equation = equationMap && equationMap[String(match[1] || '').trim()];
          /* Bài giảng và Dùng câu hỏi của MVIP phải dựng Equation qua đúng
             lớp bao của Word thông thường. Lớp bao này giữ cùng cấu trúc OMML,
             tỷ lệ cỡ chữ nguồn và baseline MathJax; chỉ quy đổi cỡ nguồn sang
             em để công thức tiếp tục tăng/giảm cùng chữ của màn trình chiếu. */
          if (equation
              && !(context && context.cv7991SkipOrdinaryEquationRules)
              && typeof window.cv7991OrdinaryEquationFragmentForPresentation === 'function') {
            try {
              const ordinaryEquationFragment = window.cv7991OrdinaryEquationFragmentForPresentation(equation);
              if (ordinaryEquationFragment) {
                const ordinaryEquationHost = document.createElement('span');
                ordinaryEquationHost.appendChild(ordinaryEquationFragment);
                const ordinaryEquationHtml = String(ordinaryEquationHost.innerHTML || '').trim();
                if (ordinaryEquationHtml) return ordinaryEquationHtml;
              }
            } catch (_) {}
          }
          return cv7991PresenterEquationHtml(equation);
        }
        return cv7991EscapeTextAllowScriptTags(part);
      }).join('');
    }

    function cv7991BuildSingleExamSlides(questions, imageMap = {}, tableMap = {}, equationMap = {}, buildOptions = {}) {
      const slides = [];
      const groupTrueFalse = !!(buildOptions && buildOptions.groupTrueFalse);
      const tfOptions = [
        { letter: 'A', text: 'Sai' },
        { letter: 'B', text: 'Sai' },
        { letter: 'C', text: 'Sai' },
        { letter: 'D', text: 'Đúng' }
      ];
      (Array.isArray(questions) ? questions : []).forEach((question, index) => {
        if (!question || question.format === 'essay') return;
        const displayNo = String(index + 1);
        const parsed = cv7991ParseQuestionForPrint(question, index + 1);
        const basePrompt = cv7991CleanPresenterText(parsed.prompt || question.text || `Câu ${displayNo}`);
        const richContext = { imageMap, tableMap, equationMap };
        const guide = cv7991CleanPresenterText(question.guide || question.solution || question.explanation || '');
        const guideHtml = guide ? cv7991PresenterHtmlFromText(guide, richContext) : '';
        if (question.format === 'tf') {
          const statements = Array.isArray(parsed.statements) ? parsed.statements : [];
          const answers = cv7991TfAnswerItems(question).slice(0, 4).map((value) => trueFalseCardDisplayValue(value) || String(value || '').trim().toUpperCase());
          if (groupTrueFalse) {
            const groupedOptions = ['a', 'b', 'c', 'd'].map((sub, subIndex) => {
              const statement = statements[subIndex] || { letter: sub, text: '' };
              const statementText = cv7991CleanPresenterText(statement.text || '');
              return {
                letter: String(statement.letter || sub).trim().toLowerCase() || sub,
                text: statementText,
                html: cv7991PresenterHtmlFromText(statementText, richContext)
              };
            });
            slides.push({
              type: 'true_false',
              label: displayNo,
              displayNumber: displayNo,
              prompt: basePrompt,
              promptHtml: cv7991PresenterHtmlFromText(basePrompt, Object.assign({}, richContext, { cv7991PreserveSourcePrompt: true })),
              options: groupedOptions,
              tfAnswers: answers,
              answerItems: answers,
              hasAnswer: answers.some((value) => ['Đ', 'S'].includes(String(value || '').trim().toUpperCase())),
              answer: '',
              groupedTrueFalse: true,
              manualTfMarks: {},
              scanSavedMarks: {},
              scanClosedItems: {},
              guide,
              guideHtml
            });
          } else {
            ['a', 'b', 'c', 'd'].forEach((sub, subIndex) => {
              const statement = statements[subIndex] || { letter: sub, text: '' };
              const statementText = cv7991CleanPresenterText(statement.text || '');
              const prompt = `${basePrompt}${statementText ? `\n${sub}) ${statementText}` : ''}`.trim();
              slides.push({
                type: 'true_false',
                label: `${displayNo}${sub}`,
                displayNumber: `${displayNo}${sub}`,
                prompt,
                promptHtml: cv7991PresenterHtmlFromText(prompt, Object.assign({}, richContext, { cv7991PreserveSourcePrompt: true })),
                options: tfOptions.map((opt) => Object.assign({}, opt, { html: cv7991PresenterHtmlFromText(opt.text || '', richContext) })),
                answer: normalizeScanAnswerToken(answers[subIndex] || 'A') || 'A',
                guide,
                guideHtml
              });
            });
          }
        } else if (question.format === 'short') {
          const shortOptions = [
            { letter: 'A', text: 'Đã trả lời' },
            { letter: 'B', text: 'Chưa trả lời' },
            { letter: 'C', text: 'Cần kiểm tra' },
            { letter: 'D', text: 'Bỏ qua' }
          ];
          slides.push({
            type: 'short',
            label: displayNo,
            displayNumber: displayNo,
            prompt: basePrompt,
            promptHtml: cv7991PresenterHtmlFromText(basePrompt, Object.assign({}, richContext, { cv7991PreserveSourcePrompt: true })),
            options: shortOptions.map((opt) => Object.assign({}, opt, { html: cv7991PresenterHtmlFromText(opt.text || '', richContext) })),
            answer: 'A',
            guide,
            guideHtml
          });
        } else {
          const options = Array.isArray(parsed.options) && parsed.options.length
            ? parsed.options.map((opt) => ({
                letter: String(opt.letter || '').trim().toUpperCase(),
                text: cv7991CleanPresenterText(opt.text || ''),
                html: cv7991PresenterHtmlFromText(cv7991CleanPresenterText(opt.text || ''), richContext)
              })).filter((opt) => opt.letter && (opt.text || opt.html))
            : ['A', 'B', 'C', 'D'].map((letter) => ({ letter, text: `Phương án ${letter}`, html: cv7991PresenterHtmlFromText(`Phương án ${letter}`, richContext) }));
          const parsedAnswerToken = normalizeScanAnswerToken(parsed.answer || cv7991McAnswer(question) || '');
          slides.push({
            type: 'single',
            label: displayNo,
            displayNumber: displayNo,
            prompt: basePrompt,
            promptHtml: cv7991PresenterHtmlFromText(basePrompt, Object.assign({}, richContext, { cv7991PreserveSourcePrompt: true })),
            options,
            optionLayoutColumns: Number(parsed.optionLayoutColumns) || 0,
            answer: parsedAnswerToken || 'A',
            hasAnswer: !!parsedAnswerToken,
            guide,
            guideHtml
          });
        }
      });
      return slides;
    }

    async function saveCv7991GeneratedExamConfig(classKey, examTitle, versions, scoringConfig = null) {
      const mon = normMonKey(classKey || '');
      if (!mon) return { saved: false, reason: 'missing-class' };
      const entry = ensureClassEntry(mon);
      if (!entry) return { saved: false, reason: 'missing-entry' };
      const cleanExamTitle = String(examTitle || '').trim();
      if (!cleanExamTitle) throw new Error('Bạn bấm "Đặt tên đề" và chọn/nhập tên đề kiểm tra trước khi sinh đề.');
      if (hasDuplicateExamConfigNameForEntry(entry, cleanExamTitle)) {
        throw new Error(`Tên đề "${cleanExamTitle}" đã có trong lớp-môn ${mon}. Bạn cần đặt tên khác.`);
      }
      const answerKeys = {};
      const codeOrder = [];
      const studentCodes = {};
      const questionLabelsByCode = {};
      (Array.isArray(versions) ? versions : []).forEach((version) => {
        const code = cv7991DisplayExamCode(version && version.code);
        const key = cv7991BuildScanAnswerKeyArray(version && version.questions);
        if (!code || !key.length) return;
        if (!codeOrder.includes(code)) codeOrder.push(code);
        answerKeys[code] = key;
        questionLabelsByCode[code] = cv7991BuildScanQuestionLabels(version && version.questions);
        const studentId = String(version && version.studentId || '').trim();
        if (studentId) studentCodes[studentId] = code;
      });
      const questionCount = codeOrder.reduce((max, code) => Math.max(max, (answerKeys[code] || []).length), 0);
      if (!questionCount || !codeOrder.length) return { saved: false, reason: 'no-scan-key' };
      const validCodes = codeOrder.filter((code) => (answerKeys[code] || []).length === questionCount);
      if (validCodes.length !== codeOrder.length) return { saved: false, reason: 'answer-length-mismatch' };
      const savedExamNo = examConfigSaveCount(entry) + 1;
      entry.examConfigSaveCount = savedExamNo;
      const savedExamUid = makeExamUid(mon, savedExamNo);
      const savedCfg = normalizeStoredExamConfig({
        enabled: true,
        examNo: savedExamNo,
        examUid: savedExamUid,
        createdAt: new Date().toISOString(),
        name: cleanExamTitle,
        questionCount,
        codeOrder,
        answerKeys,
        questionLabels: codeOrder.length ? (questionLabelsByCode[codeOrder[0]] || []) : [],
        questionLabelsByCode,
        studentCodes,
        scoringConfig: scoringConfig || buildCv7991ScoringConfigForSave(versions)
      }, entry.students);
      const configs = syncExamConfigsForEntry(entry, entry.students).filter((cfg) => cfg.examNo !== savedExamNo);
      configs.push(savedCfg);
      entry.examConfigs = configs.sort((a, b) => a.examNo - b.examNo);
      entry.examConfig = savedCfg;
      const purgedOldExamHistory = purgeExamHistoryForConfig(mon, savedExamNo);
      setSelectedExamNoForMon(mon, savedExamNo);
      state.currentMon = mon;
      state.managerMon = mon;
      state.managerExamMons = [mon];
      await pushClassDataToServerAndRefresh(`Đã lưu đề "${cleanExamTitle || savedCfg.name || 'CV7991'}" để chấm theo mã đề cho ${mon}.`);
      if (purgedOldExamHistory) await apiPut('/api/scan-history', { data: state.scanHistory || {} });
      renderClassManagerSelect();
      renderExamConfigEditor(state.managerExamMons);
      return { saved: true, examNo: savedExamNo, questionCount, codeOrder: codeOrder.slice() };
    }

    function cv7991SortQuestionsForPrint(questions) {
      const order = { mc: 0, tf: 1, short: 2, essay: 3 };
      return (Array.isArray(questions) ? questions : [])
        .map((question, index) => ({ question, index }))
        .sort((a, b) => {
          const oa = order[String(a.question && a.question.format || 'mc')] ?? 0;
          const ob = order[String(b.question && b.question.format || 'mc')] ?? 0;
          return oa === ob ? a.index - b.index : oa - ob;
        })
        .map((entry) => entry.question);
    }

    function cv7991QuestionUnitOrder(question) {
      const unitKey = cv7991UnitKey(question && question.unit);
      const items = cv7991Items();
      const idx = items.findIndex((item) => String(item && item.unitKey || cv7991UnitKey(item && item.unit)) === unitKey);
      if (idx >= 0) return idx;
      const unitText = String(question && question.unit || '');
      const lessonMatch = unitText.match(/Bài\s*(\d+)/i);
      if (lessonMatch) return 100000 + (parseInt(lessonMatch[1], 10) || 0);
      return 999999;
    }

    function cv7991CompareQuestionsBySingleOptions(a, b, options = {}) {
      const sortByLevel = !!options.sortByLevel;
      const sortByUnit = !!options.sortByUnit;
      const levelCmp = CV7991_LEVELS.indexOf(String(a && a.level || 'b')) - CV7991_LEVELS.indexOf(String(b && b.level || 'b'));
      const unitCmp = cv7991QuestionUnitOrder(a) - cv7991QuestionUnitOrder(b)
        || String(a && a.unit || '').localeCompare(String(b && b.unit || ''), 'vi', { numeric: true, sensitivity: 'base' });
      if (sortByLevel && levelCmp) return levelCmp;
      if (sortByUnit && unitCmp) return unitCmp;
      if (!sortByLevel && sortByUnit && levelCmp) return levelCmp;
      return 0;
    }

    function cv7991ShuffleQuestionsWithinSections(questions, seedKey, options = {}) {
      const sorted = cv7991SortQuestionsForPrint(questions);
      const fixedFormats = new Set((Array.isArray(options.fixedFormats) ? options.fixedFormats : []).map((item) => String(item || '')));
      const result = [];
      let index = 0;
      while (index < sorted.length) {
        const format = String(sorted[index] && sorted[index].format || 'mc');
        const group = [];
        while (index < sorted.length && String(sorted[index] && sorted[index].format || 'mc') === format) {
          group.push(sorted[index]);
          index += 1;
        }
        if (fixedFormats.has(format)) result.push(...group);
        else if (options.sortByLevel || options.sortByUnit) {
          result.push(...group
            .map((question, originalIndex) => ({ question, originalIndex }))
            .sort((a, b) => cv7991CompareQuestionsBySingleOptions(a.question, b.question, options) || a.originalIndex - b.originalIndex)
            .map((entry) => entry.question));
        } else result.push(...cv7991ShuffleDeterministic(group, `${seedKey}|section|${format}`));
      }
      return result;
    }

    function cv7991OrdinaryMathTypeGeometryFromMetrics(metrics = {}) {
      const baseWidth = Math.max(2, Number(metrics.baseWidthPx) || 18);
      const baseHeight = Math.max(2, Number(metrics.baseHeightPx) || 12);
      const fontSize = Math.max(8, Number(metrics.fontSizePx) || 16);
      const singleLine = metrics.singleLine !== false;
      const lineCount = Math.max(1, Math.min(8,
        Math.round(Number(metrics.lineCount) || (singleLine ? 1 : 2))
      ));
      const simpleSymbol = !!metrics.simpleSymbol;
      const accentedFormula = !!metrics.accentedFormula;
      const minimumHeight = fontSize * (singleLine ? 1.5 : 2.1);
      const narrowStacked = baseWidth / Math.max(1, baseHeight) < 0.75;
      const minimumWidth = narrowStacked ? fontSize * 1.6 : 0;
      const maximumScale = narrowStacked ? 2.15 : 1.75;
      let scale = 1;
      if (singleLine && simpleSymbol) {
        scale = Math.max(0.35, Math.min(3, fontSize * 1.05 / baseHeight));
      } else if (singleLine && accentedFormula) {
        scale = Math.max(0.35, Math.min(3, fontSize * 1.72 / baseHeight));
      } else {
        scale = Math.max(1, Math.min(maximumScale,
          Math.max(minimumHeight / baseHeight, minimumWidth / baseWidth)
        ));
      }
      const widthPx = baseWidth * scale;
      const heightPx = baseHeight * scale;
      let dropPx = 0;
      if (singleLine) {
        const baselineRatio = Number(metrics.baselineRatio) || 0;
        const intrinsicRatio = Number(metrics.intrinsicRatio) || 0;
        if (baselineRatio >= 0.02 && baselineRatio <= 1) {
          let contentHeight = heightPx;
          let offsetY = 0;
          if (intrinsicRatio > 0 && intrinsicRatio > widthPx / Math.max(1, heightPx)) {
            contentHeight = widthPx / intrinsicRatio;
            offsetY = Math.max(0, (heightPx - contentHeight) / 2);
          }
          const baselineY = offsetY + baselineRatio * contentHeight;
          dropPx = Math.max(0, heightPx - baselineY);
        } else {
          const bottomPaddingRatio = Math.max(0, Math.min(0.4,
            Number(metrics.bottomPaddingRatio) || 0.08
          ));
          dropPx = heightPx * bottomPaddingRatio
            + Math.max(0, Number(metrics.textInkDescentPx) || fontSize * 0.015);
        }
        /* w:position thuộc hộp OLE cũ, không thuộc đường cơ sở của vùng nét
           MathJax. Không cộng giá trị này vào phép căn mới. */
        dropPx = Math.max(-heightPx * 0.35, Math.min(heightPx * 0.72,
          dropPx
        ));
      }
      /* w:position dùng đơn vị nửa point: số âm hạ công thức một dòng,
         số dương nâng công thức nhiều tầng để mô phỏng vertical-align:middle. */
      const wordRunPositionHalfPoints = singleLine
        ? -Math.round(dropPx * 1.5)
        : Math.round(Math.max(0, heightPx / 2 - fontSize * 0.32) * 1.5);
      return {
        baseWidthPx: baseWidth,
        baseHeightPx: baseHeight,
        widthPx,
        heightPx,
        scale,
        lineCount,
        singleLine,
        dropPx,
        wordRunPositionHalfPoints,
      };
    }

    function cv7991OrdinaryMathTypeWordExportGeometry(image, fontSizePt = 12) {
      const item = image && typeof image === 'object' ? image : {};
      if (!cv7991PresenterImageIsFormula(item)) return null;
      const fontSizePx = Math.max(8, Number(fontSizePt) || 12) * 96 / 72;
      const tex = String(item.presenterTex || item.embeddedTex || '').trim();
      const normalizedTex = typeof cv7991NormalizeSingleNumberMathTypeTex === 'function'
        ? cv7991NormalizeSingleNumberMathTypeTex(tex)
        : tex.replace(/\s+/g, '');
      const lineCount = cv7991FormulaVisualLineCount(item);
      const simpleSymbol = /^[A-Za-zΑ-Ωα-ω]$/.test(normalizedTex)
        || /^\\(?:alpha|beta|gamma|delta|epsilon|varepsilon|zeta|eta|theta|vartheta|iota|kappa|lambda|mu|nu|xi|pi|rho|sigma|tau|phi|varphi|chi|psi|omega)$/i.test(normalizedTex);
      const widthEm = Math.max(0, Number(item.wordExportMathTypeWidthEm) || 0);
      const heightEm = Math.max(0, Number(item.wordExportMathTypeHeightEm) || 0);
      const prepared = !!(item.wordExportMathTypePrepared && widthEm > 0 && heightEm > 0);
      const finalAspectRatio = prepared
        ? widthEm / Math.max(0.01, heightEm)
        : (Number(item.presenterCroppedAspectRatio)
          || Number(item.wordExportMathTypeAspectRatio)
          || cv7991ImageIntrinsicAspectRatio(item)
          || 1);
      /* Đường dự phòng cũng không được quay lại hộp OLE: chỉ dùng tỷ lệ của
         ảnh đã cắt và số tầng công thức để suy kích thước theo cỡ chữ. */
      const fallbackHeightEm = lineCount <= 1
        ? (simpleSymbol ? 0.96 : (/[_^]|\\(?:sqrt|overline|underline|vec|widehat)\b/i.test(tex) ? 1.08 : 0.96))
        : Math.max(1.55, Math.min(4.4, 0.55 + lineCount * 0.55));
      /* MathJax dùng tử/mẫu nhỏ hơn chữ cùng dòng. Ở chế độ trình chiếu thông
         thường, công thức nhiều tầng được mở lớn hơn để phần tử, mẫu và gạch
         phân số có độ đậm/kích thước cân với chữ. Áp đúng phần bù này sau khi
         đã đo vùng nét, không đưa hộp OLE cũ quay lại phép tính. */
      const stackedInkScale = lineCount <= 1 ? 1 : (lineCount === 2 ? 1.25 : 1.30);
      const widthPx = (prepared
        ? widthEm * fontSizePx
        : fallbackHeightEm * fontSizePx * Math.max(0.03, finalAspectRatio)) * stackedInkScale;
      const heightPx = (prepared
        ? heightEm * fontSizePx
        : fallbackHeightEm * fontSizePx) * stackedInkScale;
      const singleLine = lineCount <= 1;
      const baselineRatio = Math.max(0.02, Math.min(1,
        Number(item.wordExportMathTypeBaselineRatio)
          || Number(item.presenterBaselineRatio)
          || (singleLine ? 0.82 : 0.62)
      ));
      const dropPx = Math.max(0, heightPx * (1 - baselineRatio));
      return {
        baseWidthPx: widthPx,
        baseHeightPx: heightPx,
        widthPx,
        heightPx,
        scale: 1,
        lineCount,
        singleLine,
        stackedInkScale,
        dropPx,
        /* Chỉ đường cơ sở MathJax mới quyết định vị trí. Không cộng w:position OLE. */
        wordRunPositionHalfPoints: -Math.round(dropPx * 1.5),
        source: prepared ? 'final-mathjax-ink' : 'cropped-ink-fallback',
      };
    }

    function cv7991WordExportImageAsset(image) {
      const item = image && typeof image === 'object' ? image : null;
      if (!item) return null;
      const preparedDataUrl = String(
        item.wordExportMathTypeDataUrl || item.presenterDataUrl || ''
      ).trim();
      if (!cv7991PresenterImageIsFormula(item) || !preparedDataUrl) {
        return item;
      }
      const dataUrl = preparedDataUrl;
      const commaIndex = dataUrl.indexOf(',');
      if (commaIndex < 0) return item;
      const header = dataUrl.slice(0, commaIndex);
      const mimeMatch = header.match(/^data:([^;,]+)/i);
      const mimeType = String(mimeMatch && mimeMatch[1] || item.presenterMimeType || 'image/png');
      let bytes = null;
      try {
        if (/;base64/i.test(header)) {
          const binary = atob(dataUrl.slice(commaIndex + 1));
          bytes = new Uint8Array(binary.length);
          for (let index = 0; index < binary.length; index += 1) {
            bytes[index] = binary.charCodeAt(index) & 0xff;
          }
        } else {
          bytes = new TextEncoder().encode(decodeURIComponent(dataUrl.slice(commaIndex + 1)));
        }
      } catch (_) {
        return item;
      }
      if (!bytes || !bytes.length) return item;
      const extension = /svg/i.test(mimeType) ? 'svg'
        : (/jpe?g/i.test(mimeType) ? 'jpg'
          : (/gif/i.test(mimeType) ? 'gif' : (/bmp/i.test(mimeType) ? 'bmp' : 'png')));
      return Object.assign({}, item, {
        data: bytes,
        path: `cv7991-mathtype.${extension}`,
        mimeType,
        cv7991OriginalSourceImage: item,
      });
    }

    window.cv7991OrdinaryMathTypeGeometryFromMetrics = cv7991OrdinaryMathTypeGeometryFromMetrics;
    window.cv7991OrdinaryMathTypeWordExportGeometry = cv7991OrdinaryMathTypeWordExportGeometry;
    window.cv7991WordExportImageAsset = cv7991WordExportImageAsset;

    async function exportCv7991GeneratedWordXmlSafe(versions, options = {}) {
      if (!window.JSZip) throw new Error('Chưa tải được thư viện đóng gói Word.');
      const imageMap = (options && options.imageMap) || (state.cv7991Bank && state.cv7991Bank.images) || {};
      const tableMap = (options && options.tableMap) || (state.cv7991Bank && state.cv7991Bank.tables) || {};
      const equationMap = (options && options.equationMap) || (state.cv7991Bank && state.cv7991Bank.equations) || {};
      // Đề kiểm tra/đề cương phải che mọi dấu màu đáp án từ ngân hàng Word.
      // Chỉ file ngan_hang_cau_hoi_on_tap_...docx được phép giữ màu nguồn.
      let cv7991PreserveSourceAnswerColorsXml = false;
      const IMG_TOKEN_RE = /\[\[CV7991_IMG:([^\]]+)\]\]/g;
      const TBL_TOKEN_RE = /\[\[CV7991_TBL:([^\]]+)\]\]/g;
      const OMML_TOKEN_RE = /\[\[CV7991_OMML:([^\]]+)\]\]/g;
      const INLINE_TOKEN_RE = /\[\[CV7991_(IMG|OMML):([^\]]+)\]\]/g;
      const TWIP_PER_CM_LOCAL = 567;
      const PAGE_MARGIN_DXA_XML = Math.round(1.5 * TWIP_PER_CM_LOCAL);
      const PAGE_WIDTH_DXA_XML = 11906;
      const PAGE_HEIGHT_DXA_XML = 16838;
      const LANDSCAPE_PAGE_WIDTH_DXA_XML = PAGE_HEIGHT_DXA_XML;
      const LANDSCAPE_PAGE_HEIGHT_DXA_XML = PAGE_WIDTH_DXA_XML;
      const TEXT_WIDTH_DXA_XML = PAGE_WIDTH_DXA_XML - PAGE_MARGIN_DXA_XML * 2;
      const ANSWER_TEXT_WIDTH_DXA_XML = LANDSCAPE_PAGE_WIDTH_DXA_XML - PAGE_MARGIN_DXA_XML * 2;
      const font = 'Times New Roman';
      const paraSpacing = { before: 90, after: 0, line: 240 };
      const xmlText = (value) => String(value == null ? '' : value)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;');
      const xmlAttr = (value) => xmlText(value).replace(/"/g, '&quot;').replace(/'/g, '&apos;');
      const safeNamePart = (value, fallback = 'img') => String(value || fallback).replace(/[^A-Za-z0-9_\-]+/g, '_').replace(/^_+|_+$/g, '') || fallback;
      const imageExt = (image) => {
        const path = String(image && image.path || '').toLowerCase();
        const match = path.match(/\.([a-z0-9]+)$/i);
        if (match) return match[1] === 'jpeg' ? 'jpg' : match[1];
        const mime = String(image && image.mimeType || '').toLowerCase();
        if (/emf/.test(mime)) return 'emf';
        if (/wmf/.test(mime)) return 'wmf';
        if (/jpe?g/.test(mime)) return 'jpg';
        if (/gif/.test(mime)) return 'gif';
        if (/bmp/.test(mime)) return 'bmp';
        if (/svg/.test(mime)) return 'svg';
        if (/webp/.test(mime)) return 'webp';
        return 'png';
      };
      const contentTypeForExt = (ext) => {
        const key = String(ext || '').toLowerCase();
        if (key === 'rels') return 'application/vnd.openxmlformats-package.relationships+xml';
        if (key === 'xml') return 'application/xml';
        if (key === 'bin') return 'application/vnd.openxmlformats-officedocument.oleObject';
        if (key === 'wmf') return 'image/x-wmf';
        if (key === 'emf') return 'image/x-emf';
        if (key === 'jpg' || key === 'jpeg') return 'image/jpeg';
        if (key === 'gif') return 'image/gif';
        if (key === 'bmp') return 'image/bmp';
        if (key === 'svg') return 'image/svg+xml';
        if (key === 'webp') return 'image/webp';
        return 'image/png';
      };
      const cv7991OriginalImageDisplaySizePtXml = (image) => {
        const item = (image && typeof image === 'object') ? image : {};
        const displayW = Number(item.sourceDisplayWidthPt) || Number(item.displayWidthPt) || 0;
        const displayH = Number(item.sourceDisplayHeightPt) || Number(item.displayHeightPt) || 0;
        let naturalW = Number(item.naturalWidthPt) || ((Number(item.width) || 0) * 0.75) || 0;
        let naturalH = Number(item.naturalHeightPt) || ((Number(item.height) || 0) * 0.75) || 0;

        // WMF/EMF không có naturalWidth/naturalHeight của trình duyệt. Khi cần,
        // đọc kích thước tự nhiên từ chính metafile để làm phương án dự phòng.
        if ((!(naturalW > 0) || !(naturalH > 0)) && item.data && typeof cv7991MetafileMetrics === 'function') {
          try {
            const metrics = cv7991MetafileMetrics(item) || {};
            if (!(naturalW > 0)) naturalW = Number(metrics.naturalWidthPt) || 0;
            if (!(naturalH > 0)) naturalH = Number(metrics.naturalHeightPt) || 0;
          } catch (_) {}
        }

        const naturalRatio = naturalW > 0 && naturalH > 0 ? naturalW / naturalH : 0;
        let widthPt = 0;
        let heightPt = 0;

        // wp:extent/VML style là kích thước hình đang hiển thị trong file Word gốc.
        // Khi có đủ hai chiều, giữ nguyên tuyệt đối, kể cả khi người soạn đã chủ động
        // thay đổi tỷ lệ của hình trong Word.
        if (displayW > 0 && displayH > 0) {
          widthPt = displayW;
          heightPt = displayH;
        } else if (displayW > 0) {
          widthPt = displayW;
          heightPt = naturalRatio > 0 ? displayW / naturalRatio : naturalH;
        } else if (displayH > 0) {
          heightPt = displayH;
          widthPt = naturalRatio > 0 ? displayH * naturalRatio : naturalW;
        } else {
          widthPt = naturalW;
          heightPt = naturalH;
        }

        if (!(widthPt > 0) && heightPt > 0 && naturalRatio > 0) widthPt = heightPt * naturalRatio;
        if (!(heightPt > 0) && widthPt > 0 && naturalRatio > 0) heightPt = widthPt / naturalRatio;
        if (!(widthPt > 0)) widthPt = 42;
        if (!(heightPt > 0)) heightPt = 24;
        return { widthPt, heightPt };
      };
      const imageSizeEmu = (image) => {
        const size = cv7991OriginalImageDisplaySizePtXml(image);
        return {
          cx: Math.max(1, Math.round(size.widthPt * 12700)),
          cy: Math.max(1, Math.round(size.heightPt * 12700)),
        };
      };
      const mediaFiles = [];
      const embeddingFiles = [];
      const rels = [];
      const defaultExts = new Set(['rels', 'xml']);
      const relCache = Object.create(null);
      let relCounter = 1;
      let docPrCounter = 1;
      let oleObjectCounter = 1;
      const ensureImageRel = (sourceRelId) => {
        const key = String(sourceRelId || '').trim();
        if (!key) return null;
        if (relCache[key]) return relCache[key];
        const image = imageMap && imageMap[key];
        if (!image || !image.data) return null;
        const exportAsset = cv7991WordExportImageAsset(image) || image;
        const ext = imageExt(exportAsset);
        defaultExts.add(ext);
        const mediaName = `cv7991_math_${safeNamePart(key, 'img')}_${relCounter}.${ext}`;
        const relId = `rId${relCounter}`;
        relCounter += 1;
        mediaFiles.push({ name: mediaName, data: exportAsset.data });
        rels.push(`<Relationship Id="${xmlAttr(relId)}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${xmlAttr(mediaName)}"/>`);
        relCache[key] = { relId, image, exportAsset };
        return relCache[key];
      };
      const cv7991EditableMathTypeObjectRunXml = (sourceRelId, opts = {}) => {
        const key = String(sourceRelId || '').trim();
        const image = imageMap && imageMap[key];
        if (!image || !image.data || !image.oleData || !image.cv7991OriginalOleObjectXml
            || !cv7991PresenterImageIsFormula(image)) return '';

        const sourceObjectXml = String(image.cv7991OriginalOleObjectXml || '').trim();
        const sourcePreviewRelId = String(image.cv7991OriginalPreviewRelId || '').trim();
        const sourceOleRelId = String(image.cv7991OriginalOleRelId || '').trim();
        if (!sourceObjectXml || !sourcePreviewRelId || !sourceOleRelId) return '';

        const objectNo = oleObjectCounter++;
        const previewExt = imageExt(image);
        defaultExts.add(previewExt);
        defaultExts.add('bin');

        const previewName = `cv7991_math_ole_preview_${objectNo}.${previewExt}`;
        const oleName = `cv7991_math_ole_${objectNo}.bin`;
        const previewRelId = `rId${relCounter++}`;
        const oleRelId = `rId${relCounter++}`;

        mediaFiles.push({ name: previewName, data: image.data });
        embeddingFiles.push({ name: oleName, data: image.oleData });
        rels.push(`<Relationship Id="${xmlAttr(previewRelId)}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${xmlAttr(previewName)}"/>`);
        rels.push(`<Relationship Id="${xmlAttr(oleRelId)}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/oleObject" Target="embeddings/${xmlAttr(oleName)}"/>`);

        let objectXml = sourceObjectXml;
        const escapedPreview = sourcePreviewRelId.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        const escapedOle = sourceOleRelId.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        objectXml = objectXml
          .replace(new RegExp(`r:id=["']${escapedPreview}["']`, 'g'), `r:id="${xmlAttr(previewRelId)}"`)
          .replace(new RegExp(`r:id=["']${escapedOle}["']`, 'g'), `r:id="${xmlAttr(oleRelId)}"`);

        // Mỗi bản sao cần ID VML/OLE riêng để Word không coi các công thức
        // ở những mã đề khác nhau là cùng một đối tượng.
        const shapeTypeId = `_x0000_t${7600 + objectNo}`;
        const shapeId = `_x0000_i${2600 + objectNo}`;
        objectXml = objectXml
          .replace(/id=["']_x0000_t\d+["']/g, `id="${shapeTypeId}"`)
          .replace(/type=["']#_x0000_t\d+["']/g, `type="#${shapeTypeId}"`)
          .replace(/id=["']_x0000_i\d+["']/g, `id="${shapeId}"`)
          .replace(/ShapeID=["']_x0000_i\d+["']/g, `ShapeID="${shapeId}"`)
          .replace(/ObjectID=["'][^"']+["']/g, `ObjectID="_${1950000000 + objectNo}"`)
          .replace(/\s+w14:anchorId=["'][^"']+["']/g, '');

        const sourcePos = Number(image.wordPositionHalfPoints);
        const requestedPos = Number(opts && opts.position);
        const finalPos = Number.isFinite(sourcePos)
          ? sourcePos
          : (Number.isFinite(requestedPos) ? requestedPos : 0);
        const runPr = finalPos
          ? `<w:rPr><w:position w:val="${Math.round(finalPos)}"/></w:rPr>`
          : '';

        return `<w:r>${runPr}${objectXml}</w:r>`;
      };

      const drawingRunXml = (sourceRelId, opts = {}) => {
        const item = ensureImageRel(sourceRelId);
        if (!item) return '';
        const fontPt = Math.max(6, (Number(opts && opts.size) || 24) / 2);
        const isFormulaImage = cv7991PresenterImageIsFormula(item.image);
        const ordinaryGeometry = isFormulaImage
          ? cv7991OrdinaryMathTypeWordExportGeometry(item.image, fontPt)
          : null;
        const size = ordinaryGeometry ? {
          cx: Math.max(1, Math.round(ordinaryGeometry.widthPx * 9525)),
          cy: Math.max(1, Math.round(ordinaryGeometry.heightPx * 9525)),
        } : imageSizeEmu(item.image);
        const id = docPrCounter++;
        const name = `MathType_${id}`;
        /* MathType dùng đúng kích thước và baseline do bộ Word thông thường tính.
           Hình minh họa không phải công thức vẫn giữ phép căn cũ. */
        const heightPt = Math.max(1, size.cy / 12700);
        const textPos = Number(opts && opts.position);
        const centerPos = -Math.round(Math.max(0, (heightPt - fontPt) / 2) * 2);
        const alignPos = ordinaryGeometry
          ? ordinaryGeometry.wordRunPositionHalfPoints
          : (opts && opts.middleLineImage ? centerPos : 0);
        /* MathType chỉ dùng baseline MathJax mới. opts.position có thể chứa
           w:position của run/OLE cũ nên chỉ còn áp dụng cho ảnh thường. */
        const finalPos = ordinaryGeometry
          ? ordinaryGeometry.wordRunPositionHalfPoints
          : alignPos + (Number.isFinite(textPos) ? textPos : 0);
        const runPr = finalPos ? `<w:rPr><w:position w:val="${Math.round(finalPos)}"/></w:rPr>` : '';
        // Công thức MathType/ảnh công thức trong ngân hàng có thể mang sẵn màu đỏ của đáp án đúng.
        // Với đề kiểm tra và đề cương, ép ảnh công thức về đen-trắng ngay trong DrawingML;
        // hình minh họa thông thường không bị đổi màu. File ngân hàng ôn tập vẫn giữ nguyên.
        const requestedFormulaColor = String(opts && opts.color || '').replace(/^#/, '').trim().toUpperCase();
        const formulaColorEffect = isFormulaImage
          ? (requestedFormulaColor
            ? `<a:duotone><a:srgbClr val="${xmlAttr(requestedFormulaColor)}"/><a:srgbClr val="FFFFFF"/></a:duotone>`
            : (!cv7991PreserveSourceAnswerColorsXml ? '<a:biLevel thresh="85000"/>' : ''))
          : '';
        return `<w:r>${runPr}<w:drawing><wp:inline distT="0" distB="0" distL="0" distR="0"><wp:extent cx="${size.cx}" cy="${size.cy}"/><wp:effectExtent l="0" t="0" r="0" b="0"/><wp:docPr id="${id}" name="${xmlAttr(name)}"/><wp:cNvGraphicFramePr><a:graphicFrameLocks noChangeAspect="1"/></wp:cNvGraphicFramePr><a:graphic><a:graphicData uri="http://schemas.openxmlformats.org/drawingml/2006/picture"><pic:pic><pic:nvPicPr><pic:cNvPr id="0" name="${xmlAttr(name)}"/><pic:cNvPicPr/></pic:nvPicPr><pic:blipFill><a:blip r:embed="${xmlAttr(item.relId)}">${formulaColorEffect}</a:blip><a:stretch><a:fillRect/></a:stretch></pic:blipFill><pic:spPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="${size.cx}" cy="${size.cy}"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></pic:spPr></pic:pic></a:graphicData></a:graphic></wp:inline></w:drawing></w:r>`;
      };
      const cv7991StandaloneEquationSizeXml = 28;
      const cv7991InlineEquationSizeXml = 30;
      const cv7991NormalizeOmmlSizeXml = (rawXml, sizeValue) => {
        const explicit = Number(sizeValue);
        if (!Number.isFinite(explicit) || explicit <= 0) return String(rawXml || '');
        const size = Math.max(8, Math.min(96, Math.round(explicit)));
        const rFonts = '<w:rFonts w:ascii="Cambria Math" w:hAnsi="Cambria Math" w:cs="Cambria Math"/>';
        const sizeXml = `<w:sz w:val="${size}"/><w:szCs w:val="${size}"/>`;
        const cleanRunPr = (inner) => String(inner || '')
          .replace(/<w:sz(?:Cs)?\b[^>]*\/>/gi, '')
          .replace(/<w:rFonts\b[^>]*\/>/gi, '');
        const runPrXml = (inner = '') => `<w:rPr>${rFonts}${sizeXml}${cleanRunPr(inner)}</w:rPr>`;
        let output = String(rawXml || '');
        output = output.replace(/<m:r(\s[^>]*)?>([\s\S]*?)<\/m:r>/gi, (all, attrs = '', inner = '') => {
          let body = String(inner || '');
          if (/<w:rPr\b/i.test(body)) {
            body = body.replace(/<w:rPr\b[^>]*>([\s\S]*?)<\/w:rPr>/i, (rpAll, rpInner = '') => runPrXml(rpInner));
          } else if (/<m:rPr\b[\s\S]*?<\/m:rPr>/i.test(body)) {
            body = body.replace(/(<m:rPr\b[\s\S]*?<\/m:rPr>)/i, `$1${runPrXml('')}`);
          } else {
            body = `${runPrXml('')}${body}`;
          }
          return `<m:r${attrs || ''}>${body}</m:r>`;
        });
        output = output.replace(/<m:ctrlPr>([\s\S]*?)<\/m:ctrlPr>/gi, (all, inner = '') => {
          let body = String(inner || '');
          if (/<w:rPr\b/i.test(body)) {
            body = body.replace(/<w:rPr\b[^>]*>([\s\S]*?)<\/w:rPr>/i, (rpAll, rpInner = '') => runPrXml(rpInner));
          } else {
            body = `${runPrXml('')}${body}`;
          }
          return `<m:ctrlPr>${body}</m:ctrlPr>`;
        });
        return output;
      };
      const cv7991OmmlInlineXml = (rawXml) => {
        let xml = String(rawXml || '').trim();
        if (!xml) return '';
        xml = xml.replace(/<m:oMathParaPr[\s\S]*?<\/m:oMathParaPr>/gi, '');
        xml = xml.replace(/<m:jc\b[^>]*\/>/gi, '');
        if (/^<m:oMathPara\b/i.test(xml)) {
          const rootStart = (xml.match(/^<m:oMathPara\b[^>]*>/i) || [''])[0];
          const nsAttrs = (rootStart.match(/\sxmlns:[a-zA-Z0-9_\-]+="[^"]+"/g) || []).join('');
          const mathMatch = xml.match(/<m:oMath\b[\s\S]*?<\/m:oMath>/i);
          if (mathMatch) {
            let mathXml = mathMatch[0];
            if (nsAttrs && !/\sxmlns:m=/i.test(mathXml)) {
              mathXml = mathXml.replace(/^<m:oMath\b/i, `<m:oMath${nsAttrs}`);
            }
            xml = mathXml;
          }
        }
        return xml;
      };
      const cleanOmmlXml = (value, opts = {}) => {
        let rawXml = String(value == null ? '' : value).trim().replace(/^<\?xml[^>]*>\s*/i, '');
        if (!rawXml) return '';
        if (!/^<m:oMath(?:Para)?\b/i.test(rawXml)) return '';
        if (opts && opts.forceInlineEquation) rawXml = cv7991OmmlInlineXml(rawXml);
        if (!/\sxmlns:m=/i.test(rawXml)) {
          rawXml = rawXml.replace(/^<m:(oMathPara|oMath)\b/i, '<m:$1 xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"');
        }
        if (opts && opts.forceInlineEquation) {
          rawXml = rawXml.replace(/<m:oMathParaPr[\s\S]*?<\/m:oMathParaPr>/gi, '').replace(/<m:jc\b[^>]*\/>/gi, '');
        }
        const sizeValue = Number(opts && opts.equationSize);
        if ((opts && opts.standaloneEquation) || (Number.isFinite(sizeValue) && sizeValue > 0)) {
          return cv7991NormalizeOmmlSizeXml(rawXml, Number.isFinite(sizeValue) && sizeValue > 0 ? sizeValue : cv7991StandaloneEquationSizeXml);
        }
        return rawXml;
      };
      const cv7991ColorizeOmmlXml = (rawXml, colorValue) => {
        const color = String(colorValue || '').replace(/^#/, '').trim().toUpperCase();
        if (!/^[0-9A-F]{6}$/.test(color)) return String(rawXml || '');
        const colorTag = `<w:color w:val="${xmlAttr(color)}"/>`;
        const addColorToRunPr = (inner) => `${colorTag}${String(inner || '').replace(/<w:color\b[^>]*\/>/gi, '')}`;
        let output = String(rawXml || '');
        output = output.replace(/<w:rPr\b([^>]*)>([\s\S]*?)<\/w:rPr>/gi, (all, attrs = '', inner = '') => `<w:rPr${attrs}>${addColorToRunPr(inner)}</w:rPr>`);
        output = output.replace(/<m:r(\s[^>]*)?>([\s\S]*?)<\/m:r>/gi, (all, attrs = '', inner = '') => {
          if (/<w:rPr\b/i.test(inner)) return all;
          let body = String(inner || '');
          if (/<m:rPr\b[\s\S]*?<\/m:rPr>/i.test(body)) {
            body = body.replace(/(<m:rPr\b[\s\S]*?<\/m:rPr>)/i, `$1<w:rPr>${colorTag}</w:rPr>`);
          } else {
            body = `<w:rPr>${colorTag}</w:rPr>${body}`;
          }
          return `<m:r${attrs || ''}>${body}</m:r>`;
        });
        output = output.replace(/<m:ctrlPr>([\s\S]*?)<\/m:ctrlPr>/gi, (all, inner = '') => {
          if (/<w:rPr\b/i.test(inner)) return all;
          return `<m:ctrlPr><w:rPr>${colorTag}</w:rPr>${inner}</m:ctrlPr>`;
        });
        return output;
      };
      const equationRunXml = (equationId, opts = {}) => {
        const item = equationMap && equationMap[String(equationId || '').trim()];
        const sourceXml = String(item && (item.xml || item) || '');
        const ordinaryOpts = Object.assign({}, opts || {});
        /* Equation của Word đã mang cỡ chữ nguồn. Không ép mọi công thức về
           14–15 pt; chỉ bổ sung cỡ chữ của dòng khi XML thật sự không có w:sz. */
        delete ordinaryOpts.standaloneEquation;
        delete ordinaryOpts.equationSize;
        if (!/<w:sz(?:Cs)?\b/i.test(sourceXml)) {
          ordinaryOpts.equationSize = Math.max(12, Math.min(96,
            Math.round(Math.max(6, Number(item && item.sourceCharacterHeightPt) || 12) * 2)
          ));
        }
        let rawXml = cleanOmmlXml(sourceXml, ordinaryOpts);
        if (!rawXml) return '';
        if (opts && opts.color) rawXml = cv7991ColorizeOmmlXml(rawXml, opts.color);
        return rawXml;
      };
      const cv7991TextHasFormulaTokenXml = (text) => /\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]/.test(String(text || ''));
      const cv7991TextIsStandaloneFormulaXml = (text) => {
        const source = String(text || '');
        if (!cv7991TextHasFormulaTokenXml(source)) return false;
        const outside = source
          .replace(/\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]/g, ' ')
          .replace(/\[\[CV7991_TBL:[^\]]+\]\]/g, ' ')
          .replace(/<\/?(?:sub|sup)>/gi, '')
          .replace(/\$[^$]*\$/g, ' ')
          .replace(/[\s0-9.,;:!?()[\]{}+\-−=×÷*\/<>≤≥|]+/g, '')
          .trim();
        return outside.length === 0;
      };
      const cv7991TextHasInlineFormulaXml = (text) => cv7991TextHasFormulaTokenXml(text) && !cv7991TextIsStandaloneFormulaXml(text);
      const cv7991EquationSizingOptsXml = (text, opts = {}) => {
        const raw = String(text || '');
        const base = Object.assign({}, opts || {});
        const explicit = Number(base.equationSize);
        if (cv7991TextIsStandaloneFormulaXml(raw)) {
          return Object.assign(base, { standaloneEquation: true, equationSize: cv7991StandaloneEquationSizeXml });
        }
        if (cv7991TextHasInlineFormulaXml(raw) && !(Number.isFinite(explicit) && explicit > 0)) {
          // Công thức Equation nằm cùng chữ thường bị Word nén nhỏ hơn công thức đứng riêng.
          // Bù riêng kích thước OMML; chữ thường vẫn giữ cỡ 12pt.
          return Object.assign(base, { equationSize: cv7991InlineEquationSizeXml });
        }
        return base;
      };
      const cv7991InlineFormulaSpacingXml = (text, spacing = {}) => {
        if (!cv7991TextHasInlineFormulaXml(text)) return spacing || {};
        const base = Object.assign({}, spacing || {});
        const currentLine = Number(base.line) || 240;
        base.line = Math.max(currentLine, 300);
        return base;
      };
      const runPrXml = (opts = {}) => {
        const parts = [`<w:rFonts w:ascii="${xmlAttr(font)}" w:hAnsi="${xmlAttr(font)}" w:eastAsia="${xmlAttr(font)}" w:cs="${xmlAttr(font)}"/>`, `<w:sz w:val="${Number(opts.size) || 24}"/>`, `<w:szCs w:val="${Number(opts.size) || 24}"/>`];
        if (opts.bold) parts.unshift('<w:b/><w:bCs/>');
        if (opts.italics) parts.unshift('<w:i/><w:iCs/>');
        if (opts.subScript) parts.push('<w:vertAlign w:val="subscript"/>');
        if (opts.superScript) parts.push('<w:vertAlign w:val="superscript"/>');
        if (opts.color) parts.push(`<w:color w:val="${xmlAttr(String(opts.color).replace(/^#/, '').toUpperCase())}"/>`);
        const textPosition = Number(opts.position);
        if (Number.isFinite(textPosition) && textPosition !== 0) parts.push(`<w:position w:val="${Math.round(textPosition)}"/>`);
        return `<w:rPr>${parts.join('')}</w:rPr>`;
      };
      const textRunXml = (text, opts = {}) => `<w:r>${runPrXml(opts)}<w:t xml:space="preserve">${xmlText(text)}</w:t></w:r>`;
      const runsFromFormattedText = (value, opts = {}) => {
        const source = String(value || '');
        const pattern = /<(sub|sup)>([\s\S]*?)<\/\1>/gi;
        const runs = [];
        let last = 0;
        let match;
        while ((match = pattern.exec(source))) {
          if (match.index > last) runs.push(textRunXml(source.slice(last, match.index), opts));
          runs.push(textRunXml(match[2] || '', Object.assign({}, opts, String(match[1]).toLowerCase() === 'sub' ? { subScript: true } : { superScript: true })));
          last = pattern.lastIndex;
        }
        if (last < source.length) runs.push(textRunXml(source.slice(last), opts));
        return runs.join('');
      };
      const runsWithImagesXml = (value, opts = {}) => {
        const raw = String(value || '');
        const effectiveOpts = cv7991EquationSizingOptsXml(raw, opts || {});
        const runs = [];
        let last = 0;
        INLINE_TOKEN_RE.lastIndex = 0;
        let match;
        while ((match = INLINE_TOKEN_RE.exec(raw))) {
          const before = raw.slice(last, match.index);
          if (before) runs.push(runsFromFormattedText(before, effectiveOpts));
          if (String(match[1] || '').toUpperCase() === 'IMG') {
            const editableMathType = cv7991EditableMathTypeObjectRunXml(match[2], effectiveOpts);
            runs.push(editableMathType || drawingRunXml(match[2], effectiveOpts));
          } else {
            runs.push(equationRunXml(match[2], effectiveOpts));
          }
          last = match.index + match[0].length;
        }
        const after = raw.slice(last);
        if (after) runs.push(runsFromFormattedText(after, effectiveOpts));
        return runs.join('') || textRunXml('', effectiveOpts);
      };
      const paraXml = (runsXml = '', opts = {}) => {
        const align = opts.alignment || 'left';
        const spacing = Object.assign({}, paraSpacing, opts.spacing || {});
        const extraPr = opts.pageBreakBefore ? '<w:pageBreakBefore/>' : '';
        const lineRuleXml = spacing.lineRule ? ` w:lineRule="${xmlAttr(spacing.lineRule)}"` : '';
        return `<w:p><w:pPr>${extraPr}<w:spacing w:before="${spacing.before}" w:after="${spacing.after}" w:line="${spacing.line}"${lineRuleXml}/><w:jc w:val="${xmlAttr(align)}"/></w:pPr>${runsXml || textRunXml('')}</w:p>`;
      };
      const pageBreakParaXml = () => '<w:p><w:r><w:br w:type="page"/></w:r></w:p>';
      const simpleParaTextXml = (text, opts = {}) => {
        const effectiveOpts = Object.assign({}, opts || {});
        if (cv7991TextHasInlineFormulaXml(text)) {
          effectiveOpts.spacing = cv7991InlineFormulaSpacingXml(text, effectiveOpts.spacing || {});
        }
        return paraXml(runsWithImagesXml(text, effectiveOpts), effectiveOpts);
      };
      const normalizeOptionText = (text) => cv7991NormalizeOptionText(text);
      const optionImageTextRaiseXml = (opt) => {
        const text = normalizeOptionText(opt && opt.text);
        let raise = 0;
        text.replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (all, relId) => {
          const image = imageMap && imageMap[String(relId || '').trim()];
          const heightPt = cv7991OriginalImageDisplaySizePtXml(image).heightPt;
          // Nếu phương án có ảnh MathType cao như phân số, Word sẽ kéo baseline của dòng xuống,
          // làm chữ cái B/C/D trong cùng hàng bị tụt. Nâng riêng phần chữ của phương án đó lên
          // để chữ cái phương án thẳng hàng với các phương án còn lại.
          raise = Math.max(raise, Math.min(28, Math.round(Math.max(0, heightPt - 9) * 1.35)));
          return all;
        });
        return raise;
      };
      const cv7991AnswerLetterXml = (value) => {
        const match = String(value || '').trim().toUpperCase().match(/[A-D]/);
        return match ? match[0] : '';
      };
      const cv7991OptionIsCorrectXml = (opt, answerLetter) => {
        if (!cv7991PreserveSourceAnswerColorsXml) return false;
        const correctLetter = cv7991AnswerLetterXml(answerLetter);
        return !!correctLetter && String(opt && opt.letter || '').trim().toUpperCase() === correctLetter;
      };
      const optionRunsXml = (opt, labelSuffix = '.', answerLetter = '') => {
        const safeOpt = opt || { letter: '', text: '' };
        const letter = String(safeOpt.letter || '').trim();
        const answerColor = cv7991OptionIsCorrectXml(safeOpt, answerLetter) ? { color: 'FF0000' } : {};
        const labelXml = letter
          ? textRunXml(`${letter}${labelSuffix}`, Object.assign({ bold: true }, answerColor)) + textRunXml(' ', answerColor)
          : textRunXml('');
        // Để nhãn A/B/C/D và công thức MathType cùng nằm trong một paragraph,
        // Word dùng chung một baseline. Ảnh công thức sẽ được hạ bằng drawingRunXml.
        return labelXml + runsWithImagesXml(normalizeOptionText(safeOpt && safeOpt.text), Object.assign({ middleLineImage: true, optionFormula: true }, answerColor));
      };
      const OPTION_LINE_WIDTH_XML = 92;
      const MIN_OPTION_GAP_XML = 10;
      // Ước lượng số ký tự tối đa để mỗi phương án KHÔNG bị tự xuống dòng trong ô.
      // Nếu một phương án dài hơn ngưỡng của bố cục 1 dòng/2 dòng thì chuyển hẳn sang 4 dòng.
      const OPTION_ROW4_CELL_WIDTH_XML = 20;
      const OPTION_GRID2_CELL_WIDTH_XML = 42;
      const imageTokenCharLengthXml = (sourceRelId) => {
        const image = imageMap && imageMap[String(sourceRelId || '').trim()];
        const sourceWPt = cv7991OriginalImageDisplaySizePtXml(image).widthPt;
        return Math.max(4, Math.min(240, Math.ceil(sourceWPt / 5.2)));
      };
      const equationTokenCharLengthXml = (equationId) => {
        const item = equationMap && equationMap[String(equationId || '').trim()];
        const rawXml = String((item && (item.xml || item)) || '');
        const mathText = String(item && item.text || '').trim() || rawXml.replace(/<[^>]+>/g, '').replace(/\s+/g, '');
        return Math.max(2, Math.min(24, mathText.length || 8));
      };
      const optionTextLengthXml = (opt) => {
        const labelLength = String(opt && opt.letter || '').length + 2;
        const text = normalizeOptionText(opt && opt.text)
          .replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (all, relId) => 'x'.repeat(imageTokenCharLengthXml(relId)))
          .replace(/\[\[CV7991_OMML:([^\]]+)\]\]/g, (all, equationId) => 'x'.repeat(equationTokenCharLengthXml(equationId)))
          .replace(/\[\[CV7991_TBL:[^\]]+\]\]/g, '')
          .replace(/<\/?(?:sub|sup)>/gi, '')
          .replace(/\$([^$]+)\$/g, '$1')
          .replace(/\s+/g, ' ')
          .trim();
        return labelLength + text.length;
      };
      const optionLineFitsXml = (items, maxCellChars) => {
        const row = Array.isArray(items) ? items : [];
        const totalTextLength = row.reduce((sum, item) => sum + optionTextLengthXml(item), 0);
        const noCellWillWrap = row.every((item) => optionTextLengthXml(item) <= maxCellChars);
        return noCellWillWrap && totalTextLength + Math.max(0, row.length - 1) * MIN_OPTION_GAP_XML <= OPTION_LINE_WIDTH_XML;
      };
      const optionLayoutModeXml = (opts) => {
        const row = Array.isArray(opts) ? opts : [];
        if (row.length !== 4) return 'stack';
        if (optionLineFitsXml(row, OPTION_ROW4_CELL_WIDTH_XML)) return 'row4';
        if (optionLineFitsXml(row.slice(0, 2), OPTION_GRID2_CELL_WIDTH_XML) && optionLineFitsXml(row.slice(2, 4), OPTION_GRID2_CELL_WIDTH_XML)) return 'grid2';
        // Có ít nhất một phương án dài: không để Word tự xuống dòng trong ô 2 cột/4 cột,
        // mà chuyển sang 4 dòng A, B, C, D riêng biệt.
        return 'stack';
      };
      const noBorderCellXml = '<w:tcBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/></w:tcBorders>';
      const noBorderTableXml = '<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/><w:insideH w:val="nil"/><w:insideV w:val="nil"/></w:tblBorders>';
      const optionInnerCellXml = (contentXml, widthDxa, align = 'left', rightMar = 0, line = 240, gridSpan = 1) => {
        const safeLine = Math.max(240, Math.floor(Number(line) || 240));
        const safeSpan = Math.max(1, Math.floor(Number(gridSpan) || 1));
        const gridSpanXml = safeSpan > 1 ? `<w:gridSpan w:val="${safeSpan}"/>` : '';
        return `<w:tc><w:tcPr><w:tcW w:w="${Math.max(120, Math.floor(widthDxa))}" w:type="dxa"/>${gridSpanXml}${noBorderCellXml}<w:vAlign w:val="center"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="${Math.max(0, Math.floor(rightMar))}" w:type="dxa"/></w:tcMar></w:tcPr>${paraXml(contentXml, { alignment: align, spacing: { before: 0, after: 0, line: safeLine } })}</w:tc>`;
      };
      const optionPairCellsXml = (opt, slotWidthDxa, labelSuffix = '.', answerLetter = '') => {
        const safeOpt = opt || { letter: '', text: '' };
        const hasLetter = String(safeOpt.letter || '').trim();
        const contentText = normalizeOptionText(safeOpt && safeOpt.text);
        const standaloneFormula = hasLetter && cv7991TextIsStandaloneFormulaXml(contentText);
        const optionLine = cv7991TextHasInlineFormulaXml(contentText) || standaloneFormula ? 300 : 240;
        const answerColor = cv7991OptionIsCorrectXml(safeOpt, answerLetter) ? { color: 'FF0000' } : {};
        const inlineGuardXml = () => textRunXml('​', Object.assign({ size: 2 }, answerColor));
        const contentXml = hasLetter
          ? (standaloneFormula
            ? textRunXml(`${safeOpt.letter}${labelSuffix}`, Object.assign({ bold: true }, answerColor)) + textRunXml(' ', answerColor)
              + inlineGuardXml()
              + runsWithImagesXml(contentText, Object.assign({ middleLineImage: true, standaloneEquation: true, equationSize: cv7991StandaloneEquationSizeXml, forceInlineEquation: true, optionFormula: true }, answerColor))
              + inlineGuardXml()
            : optionRunsXml(safeOpt, labelSuffix, answerLetter))
          : textRunXml('');
        // Dùng một ô/paragraph cho cả nhãn A/B/C/D và nội dung. Cách này bắt buộc Word
        // cho nhãn và ảnh công thức dùng chung baseline, tránh trường hợp công thức 1 dòng
        // hoặc phân số bị lệch chân so với chữ cái phương án.
        return optionInnerCellXml(contentXml, slotWidthDxa, 'left', 80, optionLine, 2);
      };
      const optionTableXml = (rows, colCount, labelSuffix = '.', answerLetter = '') => {
        const columns = Math.max(1, Number(colCount) || 1);
        const slotWidthDxa = Math.floor(TEXT_WIDTH_DXA_XML / columns);
        const gridXml = `<w:tblGrid>${Array.from({ length: columns }).map(() => {
          const labelW = 430;
          const contentW = Math.max(360, Math.floor(slotWidthDxa - labelW - 80));
          return `<w:gridCol w:w="${labelW}"/><w:gridCol w:w="${contentW}"/>`;
        }).join('')}</w:tblGrid>`;
        const bodyXml = (rows || []).map((row) => {
          const cells = Array.from({ length: columns }).map((_, index) => optionPairCellsXml((row || [])[index] || { letter: '', text: '' }, slotWidthDxa, labelSuffix, answerLetter)).join('');
          return `<w:tr>${cells}</w:tr>`;
        }).join('');
        return `<w:tbl><w:tblPr><w:tblW w:w="${TEXT_WIDTH_DXA_XML}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${noBorderTableXml}<w:tblCellMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tblCellMar></w:tblPr>${gridXml}${bodyXml}</w:tbl>`;
      };
      const appendMcOptionsXml = (parts, opts, answerLetter = '') => {
        const row = Array.isArray(opts) ? opts : [];
        if (row.length !== 4) {
          // Phương án dài hoặc có công thức: mỗi phương án một dòng, nhưng vẫn dùng bảng ẩn
          // và một paragraph chung để A/B/C/D cùng baseline với ảnh MathType.
        parts.push(optionTableXml(row.map((opt) => [opt]), 1, '.', answerLetter));
          return;
        }
        const mode = optionLayoutModeXml(row);
        if (mode === 'row4') {
          // Một dòng: dùng bảng không viền 4 cột bằng nhau để A/B/C/D dãn đều hết dòng.
          parts.push(optionTableXml([row], 4, '.', answerLetter));
          return;
        }
        if (mode === 'grid2') {
          // Hai dòng: dùng bảng không viền 2 cột để B và D thẳng hàng theo cùng một cột.
          parts.push(optionTableXml([row.slice(0, 2), row.slice(2, 4)], 2, '.', answerLetter));
          return;
        }
        // Có ít nhất một phương án dài: chuyển hẳn sang 4 dòng A/B/C/D.
        // Vẫn dùng bảng ẩn, nhưng mỗi phương án nằm trong một paragraph chung.
        parts.push(optionTableXml(row.map((opt) => [opt]), 1, '.', answerLetter));
      };
      const appendQuestionXml = (parts, parsedQuestion) => {
        const promptLines = String(parsedQuestion && parsedQuestion.prompt || '').split('\n').map((line) => line.trim()).filter(Boolean);
        // Căn giữa theo dòng cho mọi ảnh công thức MathType trong phần đề bài,
        // giống cách đã xử lý ở các phương án A/B/C/D.
        const promptImageOpts = { middleLineImage: true };
        let needQuestionLabel = true;
        const appendPromptLineXml = (line) => {
          const segments = String(line || '').split(/(\[\[CV7991_TBL:[^\]]+\]\])/g).filter((part) => part && part.trim());
          if (!segments.length && needQuestionLabel) {
            parts.push(paraXml(textRunXml(`Câu ${parsedQuestion.displayNumber}. `, { bold: true })));
            needQuestionLabel = false;
            return;
          }
          segments.forEach((part) => {
            const tableId = tableTokenOnlyXml(part);
            if (tableId && tableMap && tableMap[tableId]) {
              if (needQuestionLabel) {
                parts.push(paraXml(textRunXml(`Câu ${parsedQuestion.displayNumber}. `, { bold: true })));
                needQuestionLabel = false;
              }
              parts.push(dataTableXml(tableMap[tableId]));
              return;
            }
            const cleanText = String(part || '').trim();
            if (!cleanText) return;
            const prefixXml = needQuestionLabel ? textRunXml(`Câu ${parsedQuestion.displayNumber}. `, { bold: true }) : '';
            const promptParaOpts = cv7991TextHasInlineFormulaXml(cleanText) ? { spacing: cv7991InlineFormulaSpacingXml(cleanText, {}) } : undefined;
            parts.push(paraXml(prefixXml + runsWithImagesXml(cleanText, promptImageOpts), promptParaOpts));
            needQuestionLabel = false;
          });
        };
        if (promptLines.length) promptLines.forEach(appendPromptLineXml);
        else appendPromptLineXml('');
        if (parsedQuestion.format === 'mc') {
          appendMcOptionsXml(parts, parsedQuestion.options || [], parsedQuestion.answer || '');
        } else if (parsedQuestion.format === 'tf') {
          const modeNow=String(options && options.wordTemplate && options.wordTemplate.mode || 'form2').toLowerCase();
          const directNow=['form1','form2','form3'].includes(modeNow);
          if (!directNow) {
            (parsedQuestion.statements || []).forEach((item) => {
              const safeItem = Object.assign({}, item || {}, { text: cv7991StripAnswerHintTokens(String(item && item.text || '').trim()) });
              parts.push(paraXml(optionRunsXml(safeItem, ')'), { alignment:'left', spacing:{before:0,after:0,line:240} }));
            });
          } else {
            const tableWidth = TEXT_WIDTH_DXA_XML;
            const answerWidth = Math.max(900, Math.round(tableWidth * 0.14));
            const contentWidth = Math.max(1200, tableWidth - answerWidth);
            const tfRows = [[
              cellXml(paraXml(textRunXml('Nội dung', { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: contentWidth, widthType: 'dxa', verticalAlign: 'center' }),
              cellXml(paraXml(textRunXml('Đ hoặc S', { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: answerWidth, widthType: 'dxa', verticalAlign: 'center', noWrap: true })
            ]];
            (parsedQuestion.statements || []).forEach((item) => {
              const safeItem = Object.assign({}, item || {}, { text: cv7991StripAnswerHintTokens(String(item && item.text || '').trim()) });
              tfRows.push([
                cellXml(paraXml(optionRunsXml(safeItem, ')'), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: contentWidth, widthType: 'dxa', verticalAlign: 'center' }),
                cellXml(paraXml(textRunXml(''), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: answerWidth, widthType: 'dxa', verticalAlign: 'center' })
              ]);
            });
            parts.push(keepWholeTableXml(tableXml(tfRows, { fixed: true, widthDxa: tableWidth, gridWidths: [contentWidth, answerWidth] })));
          }
        } else if (parsedQuestion.format === 'short') {
          const modeNow=String(options && options.wordTemplate && options.wordTemplate.mode || 'form2').toLowerCase();
          if (['form1','form2','form3'].includes(modeNow)) parts.push(simpleParaTextXml('Trả lời: ........................................'));
        }
      };
      const sectionHeadingXml = (format, sectionNumber = null) => {
        const label = cv7991FormatLabel(format, sectionNumber);
        const instruction = cv7991SectionInstruction(format);
        if (instruction) {
          return paraXml(textRunXml(`${label}:`, { bold: true }) + textRunXml(` ${instruction}`, { italics: true }), { spacing: { before: 180, after: 0, line: 240 } });
        }
        return paraXml(textRunXml(label, { bold: true }), { spacing: { before: 180, after: 0, line: 240 } });
      };
      const cellXml = (contentXml, opts = {}) => {
        const span = Math.max(1, Number(opts.colSpan) || 1);
        const align = opts.align || 'center';
        const borders = opts.noBorder ? '<w:tcBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/></w:tcBorders>' : '';
        const gridSpan = span > 1 ? `<w:gridSpan w:val="${span}"/>` : '';
        const widthType = opts.widthType || 'pct';
        const width = opts.width ? `<w:tcW w:w="${opts.width}" w:type="${xmlAttr(widthType)}"/>` : '';
        const noWrap = opts.noWrap ? '<w:noWrap/>' : '';
        const verticalAlign = opts.verticalAlign ? `<w:vAlign w:val="${xmlAttr(opts.verticalAlign)}"/>` : '';
        const vMerge = opts.vMerge ? `<w:vMerge${opts.vMerge === 'restart' ? ' w:val="restart"' : ''}/>` : '';
        const shading = opts.shade ? `<w:shd w:val="clear" w:color="auto" w:fill="${xmlAttr(opts.shade)}"/>` : '';
        const marginY = Math.max(0, Math.floor(Number.isFinite(Number(opts.marginY)) ? Number(opts.marginY) : 60));
        const marginX = Math.max(0, Math.floor(Number.isFinite(Number(opts.marginX)) ? Number(opts.marginX) : 80));
        return `<w:tc><w:tcPr>${width}${gridSpan}${borders}${noWrap}${verticalAlign}${vMerge}${shading}<w:tcMar><w:top w:w="${marginY}" w:type="dxa"/><w:bottom w:w="${marginY}" w:type="dxa"/><w:left w:w="${marginX}" w:type="dxa"/><w:right w:w="${marginX}" w:type="dxa"/></w:tcMar></w:tcPr>${contentXml || paraXml(textRunXml(''), { alignment: align })}</w:tc>`;
      };
      const cellTextXml = (text, opts = {}) => {
        const runOpts = {
          bold: !!opts.bold,
          size: Number(opts.size) || 24,
          color: opts.color ? String(opts.color).replace(/^#/, '') : ''
        };
        return cellXml(paraXml(runsWithImagesXml(text, runOpts), { alignment: opts.align || 'center', spacing: { before: 0, after: 0, line: Number(opts.line) || 240, lineRule: opts.lineRule || '' } }), opts);
      };
      const tableXml = (rows, opts = {}) => {
        const borderXml = opts.noBorder
          ? '<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/><w:insideH w:val="nil"/><w:insideV w:val="nil"/></w:tblBorders>'
          : '<w:tblBorders><w:top w:val="single" w:sz="4" w:color="000000"/><w:left w:val="single" w:sz="4" w:color="000000"/><w:bottom w:val="single" w:sz="4" w:color="000000"/><w:right w:val="single" w:sz="4" w:color="000000"/><w:insideH w:val="single" w:sz="4" w:color="000000"/><w:insideV w:val="single" w:sz="4" w:color="000000"/></w:tblBorders>';
        const widthValue = opts.widthDxa ? Math.max(1, Math.floor(opts.widthDxa)) : (Number(opts.widthPct) || 5000);
        const widthType = opts.widthDxa ? 'dxa' : 'pct';
        const layoutXml = opts.fixed ? '<w:tblLayout w:type="fixed"/>' : (opts.autofit ? '<w:tblLayout w:type="autofit"/>' : '');
        const gridXml = Array.isArray(opts.gridWidths) && opts.gridWidths.length
          ? `<w:tblGrid>${opts.gridWidths.map((w) => `<w:gridCol w:w="${Math.max(1, Math.floor(w))}"/>`).join('')}</w:tblGrid>`
          : '';
        const rowHeights = Array.isArray(opts.rowHeights) ? opts.rowHeights : [];
        return `<w:tbl><w:tblPr><w:tblW w:w="${widthValue}" w:type="${widthType}"/>${layoutXml}${borderXml}</w:tblPr>${gridXml}${(rows || []).map((row, rowIndex) => {
          const rowHeight = Math.max(0, Math.floor(Number(rowHeights[rowIndex]) || 0));
          const trPr = rowHeight > 0 ? `<w:trPr><w:trHeight w:val="${rowHeight}" w:hRule="atLeast"/></w:trPr>` : '';
          return `<w:tr>${trPr}${(row || []).join('')}</w:tr>`;
        }).join('')}</w:tbl>`;
      };
      const keepWholeTableXml = (innerTableXml) => {
        const width = TEXT_WIDTH_DXA_XML;
        return `<w:tbl><w:tblPr><w:tblW w:w="${width}" w:type="dxa"/><w:tblLayout w:type="fixed"/><w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/><w:insideH w:val="nil"/><w:insideV w:val="nil"/></w:tblBorders></w:tblPr><w:tblGrid><w:gridCol w:w="${width}"/></w:tblGrid><w:tr><w:trPr><w:cantSplit/></w:trPr><w:tc><w:tcPr><w:tcW w:w="${width}" w:type="dxa"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tcMar><w:tcBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/></w:tcBorders></w:tcPr>${innerTableXml}<w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p></w:tc></w:tr></w:tbl>`;
      };
      const tableTokenOnlyXml = (value) => {
        const match = String(value || '').trim().match(/^\[\[CV7991_TBL:([^\]]+)\]\]$/);
        return match ? String(match[1] || '').trim() : '';
      };
      const dataTableXml = (tableData, depth = 0) => {
        const rows = Array.isArray(tableData && tableData.rows) ? tableData.rows : [];
        if (!rows.length) return paraXml(textRunXml(''));
        const isTextBoxTable = !!(tableData && tableData.isTextBoxTable);
        const sourceWidths = Array.isArray(tableData && tableData.columnWidths)
          ? tableData.columnWidths.map((value) => Math.max(0, Number(value) || 0)) : [];
        const sourceWidthTotal = sourceWidths.reduce((sum, value) => sum + value, 0);
        const gridWidths = sourceWidthTotal > 0
          ? sourceWidths.map((value) => Math.max(1, Math.floor(TEXT_WIDTH_DXA_XML * value / sourceWidthTotal)))
          : [];
        const sourceRowHeights = Array.isArray(tableData && tableData.sourceRowHeightsPx)
          ? tableData.sourceRowHeightsPx.map((value) => Math.max(0, Math.round((Number(value) || 0) * 15))) : [];
        const rowXml = rows.map((row) => (Array.isArray(row) ? row : []).map((cell) => {
          const span = Math.max(1, Number(cell && cell.gridSpan) || 1);
          const parts = [];
          String(cell && cell.text || '').replace(/\r/g, '').split('\n').forEach((line) => {
            const cleanLine = String(line || '').trim();
            if (!cleanLine) return;
            const nestedId = tableTokenOnlyXml(cleanLine);
            if (nestedId && depth < 2 && tableMap && tableMap[nestedId]) {
              parts.push(dataTableXml(tableMap[nestedId], depth + 1));
            } else {
              parts.push(paraXml(runsWithImagesXml(cleanLine, { middleLineImage: true }), {
                alignment: 'center',
                spacing: { before: 0, after: 0, line: 240 }
              }));
            }
          });
          if (!parts.length) parts.push(paraXml(textRunXml(''), {
            alignment: 'center',
            spacing: { before: 0, after: 0, line: 240 }
          }));
          const rawVAlign = String(cell && cell.vAlign || '').toLowerCase();
          const verticalAlign = rawVAlign === 'middle' ? 'center'
            : (['top', 'bottom', 'center'].includes(rawVAlign) ? rawVAlign : '');
          return cellXml(parts.join(''), {
            colSpan: span,
            align: 'center',
            verticalAlign,
            marginY: isTextBoxTable ? 0 : 60,
            marginX: isTextBoxTable ? 12 : 80
          });
        })).filter((row) => row.length);
        return keepWholeTableXml(tableXml(rowXml, {
          fixed: isTextBoxTable,
          gridWidths,
          rowHeights: isTextBoxTable ? sourceRowHeights : []
        }));
      };
      const displayExamCode = (code) => cv7991DisplayExamCode(code);
      const answerValueForQuestion = (question, format, subIndex) =>
        cv7991StrictAnswerDisplay(question, format, subIndex);

      const answerIsMissingForQuestion = (question, format, subIndex) =>
        cv7991StrictAnswerState(question, format, subIndex).missing;

      const answerCellTextXml = (question, format, subIndex, opts = {}) => {
        const missing = answerIsMissingForQuestion(question, format, subIndex);
        const cellValue = answerValueForQuestion(question, format, subIndex);
        return cellTextXml(
          cellValue,
          Object.assign({}, opts || {}, missing ? {} : {})
        );
      };
      const cv7991AnswerEntriesByFormat = (questions, format) => (Array.isArray(questions) ? questions : [])
        .map((question, index) => ({ question, number: index + 1 }))
        .filter((entry) => entry.question && String(entry.question.format || 'mc') === format);
      const cv7991AnswerChunks = (entries, size) => {
        const source = Array.isArray(entries) ? entries : [];
        const chunkSize = Math.max(1, Number(size) || 10);
        const chunks = [];
        for (let i = 0; i < source.length; i += chunkSize) chunks.push(source.slice(i, i + chunkSize));
        return chunks;
      };
      const answerCellOptsXml = (extra = {}) => Object.assign({
        size: Number(extra && extra.size) || 22,
        line: Number(extra && extra.line) || 220,
        lineRule: 'exact',
        marginY: 30,
        marginX: 45,
        widthType: 'dxa',
        noWrap: true,
        align: 'center',
        verticalAlign: 'center',
      }, extra || {});
      const appendCv7991AnswerSectionHeadingXml = (parts, format, sectionNumber) => {
        parts.push(paraXml(textRunXml(cv7991FormatLabel(format, sectionNumber), { bold: true }), { spacing: { before: 220, after: 60, line: 240 } }));
      };
      const appendTwoRowAnswerTableXml = (parts, entries, format, opts = {}) => {
        const source = Array.isArray(entries) ? entries : [];
        if (!source.length) return false;
        const maxCols = Math.max(1, Number(opts.maxCols) || 10);
        const valueLabel = String(opts.valueLabel || 'Đáp án');
        cv7991AnswerChunks(source, maxCols).forEach((chunk) => {
          const labelWidth = Number(opts.labelWidth) || 1250;
          const valueWidth = Math.max(520, Math.floor((TEXT_WIDTH_DXA_XML - labelWidth) / Math.max(1, chunk.length)));
          const gridWidths = [labelWidth, ...Array.from({ length: chunk.length }, () => valueWidth)];
          const rows = [
            [
              cellTextXml('Câu', answerCellOptsXml({ width: labelWidth, bold: true })),
              ...chunk.map((entry) => cellTextXml(String(entry.number), answerCellOptsXml({ width: valueWidth, bold: true }))),
            ],
            [
              cellTextXml(valueLabel, answerCellOptsXml({ width: labelWidth, bold: true })),
              ...chunk.map((entry) => answerCellTextXml(entry.question, format, 0, answerCellOptsXml({ width: valueWidth }))),
            ],
          ];
          parts.push(tableXml(rows, { fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths }));
        });
        return true;
      };
      const appendTrueFalseAnswerTableXml = (parts, entries) => {
        const source = Array.isArray(entries) ? entries : [];
        if (!source.length) return false;
        cv7991AnswerChunks(source, 8).forEach((chunk) => {
          const labelWidth = 900;
          const valueWidth = Math.max(760, Math.floor((TEXT_WIDTH_DXA_XML - labelWidth) / Math.max(1, chunk.length)));
          const gridWidths = [labelWidth, ...Array.from({ length: chunk.length }, () => valueWidth)];
          const rows = [];
          rows.push([
            cellTextXml('', answerCellOptsXml({ width: labelWidth, bold: true })),
            ...chunk.map((entry) => cellTextXml(`Câu ${entry.number}`, answerCellOptsXml({ width: valueWidth, bold: true }))),
          ]);
          ['a', 'b', 'c', 'd'].forEach((sub, subIndex) => {
            rows.push([
              cellTextXml(sub, answerCellOptsXml({ width: labelWidth, bold: true })),
              ...chunk.map((entry) => answerCellTextXml(entry.question, 'tf', subIndex, answerCellOptsXml({ width: valueWidth }))),
            ]);
          });
          parts.push(tableXml(rows, { fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths }));
        });
        return true;
      };
      const appendCv7991EssayMarkingGuideXml = (parts, answerText) => {
        let raw = String(answerText || '').replace(/\r/g, '').trim();
        if (!raw) raw = 'Đáp án và thang điểm: 1,00 điểm';
        raw = raw.replace(/^\s*Hướng dẫn chấm\s*:/i, 'Đáp án và thang điểm:');
        raw = raw.replace(/^\s*Đáp án\s*:/i, 'Đáp án và thang điểm:');
        if (!/^\s*Đáp án và thang điểm\s*:/i.test(raw)) raw = `Đáp án và thang điểm: 1,00 điểm\n${raw}`;
        const lines = raw.split('\n').map((line) => line.trim()).filter((line) => line && !/^Chấp nhận cách giải khác đúng bản chất toán học\.?$/i.test(line));
        lines.forEach((line) => {
          const tableId = tableTokenOnlyXml(line);
          if (tableId && tableMap && tableMap[tableId]) {
            parts.push(dataTableXml(tableMap[tableId]));
            return;
          }
          parts.push(simpleParaTextXml(line, /^\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]$/.test(line)
            ? { alignment: 'center', spacing: { before: 60, after: 60, line: 240 } }
            : { spacing: { before: 40, after: 0, line: 240 } }));
        });
      };
      const appendEssayAnswerEntriesXml = (parts, entries) => {
        const source = Array.isArray(entries) ? entries : [];
        if (!source.length) return false;
        source.forEach((entry) => {
          parts.push(paraXml(textRunXml(`Câu ${entry.number}`, { bold: true }), { spacing: { before: 100, after: 0, line: 240 } }));
          appendCv7991EssayMarkingGuideXml(parts, entry.question && entry.question.answer);
        });
        return true;
      };
      const cv7991AnswerVersionClassKeyXml = (version) => {
        const raw = String((version && (version.mon || version.classKey || version.lopMon)) || '').trim();
        if (raw) return normMonKey(raw);
        const label = String((version && version.classLabel) || '').trim();
        return label ? label.toLowerCase() : '';
      };
      const cv7991AnswerVersionClassLabelXml = (version) => {
        const raw = String((version && (version.mon || version.classKey || version.lopMon)) || '').trim();
        const label = String((version && version.classLabel) || '').trim();
        if (label) return label;
        if (raw) return cv7991ClassLabelFromKey(raw) || raw;
        return '';
      };
      const cv7991AnswerVersionsForOutputXml = (answerVersions) => {
        const allVersions = (Array.isArray(answerVersions) ? answerVersions : []).filter((version) => version && Array.isArray(version.questions));
        const versionsList = allVersions.filter((version) => !(version && version.isOriginalBase));
        const source = versionsList.length ? versionsList : allVersions;
        const seen = new Set();
        const unique = [];
        source.forEach((version) => {
          const code = displayExamCode(version && version.code) || String(unique.length + 1).padStart(2, '0');
          if (seen.has(code)) return;
          seen.add(code);
          unique.push(version);
        });
        return unique;
      };
      const cv7991AnswerHasMultipleClassesXml = (answerVersions) => {
        const classes = new Set();
        (Array.isArray(answerVersions) ? answerVersions : []).forEach((version) => {
          const key = cv7991AnswerVersionClassKeyXml(version);
          if (key) classes.add(key);
        });
        return classes.size > 1;
      };
      const cv7991AnswerRowCodeLabelXml = (version, answerVersions) => {
        const code = displayExamCode(version && version.code) || '01';
        if (!cv7991AnswerHasMultipleClassesXml(answerVersions)) return code;
        const cls = cv7991AnswerVersionClassLabelXml(version);
        return cls ? `${cls}-${code}` : code;
      };
      const cv7991UseGroupedAnswerLayoutXml = (answerVersions) => {
        if (options && options.singleExam) return false;
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        return unique.length > 1;
      };
      const cv7991AnswerTitleClassLabelXml = (version) => {
        const rawKey = String((version && (version.mon || version.classKey || version.lopMon)) || '').trim();
        const fallback = String((version && version.classLabel) || '').trim();
        const raw = rawKey || fallback;
        if (!raw) return '';
        const parts = raw.split(/[-_–—]/).map((part) => part.trim()).filter(Boolean);
        const subject = (parts[0] || fallback || raw).trim();
        const tail = parts.length > 1 ? parts.slice(1).join(' ') : raw;
        const gradeMatch = String(tail || '').match(/(\d{1,2})/);
        const grade = gradeMatch ? gradeMatch[1] : '';
        if (subject && grade) {
          const subjectGradeMatch = subject.match(new RegExp(`^(.*?)(?:\\s*)${grade}[A-Za-zÀ-ỹ]*$`, 'i'));
          if (subjectGradeMatch && String(subjectGradeMatch[1] || '').trim()) {
            return `${String(subjectGradeMatch[1] || '').trim()} ${grade}`.replace(/\s+/g, ' ').trim();
          }
          if (!new RegExp(`(?:^|[^0-9])${grade}(?:[^0-9]|$)`).test(subject)) {
            return `${subject} ${grade}`.replace(/\s+/g, ' ').trim();
          }
        }
        return (fallback || subject || raw).replace(/\s+/g, ' ').trim();
      };
      const cv7991AnswerTitleXml = (answerVersions) => {
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        const classLabels = [];
        unique.forEach((version) => {
          const label = cv7991AnswerTitleClassLabelXml(version);
          if (label && !classLabels.includes(label)) classLabels.push(label);
        });
        const classText = classLabels.length === 1 ? classLabels[0] : (classLabels.length > 1 ? classLabels.join(', ') : '');
        const title = String(examTitle || '').trim();
        return ['ĐÁP ÁN', title, classText].filter(Boolean).join(' ');
      };
      const cv7991MatrixTitleXml = (answerVersions) => {
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        const classLabels = [];
        unique.forEach((version) => {
          const label = cv7991AnswerTitleClassLabelXml(version);
          if (label && !classLabels.includes(label)) classLabels.push(label);
        });
        const classText = classLabels.length === 1 ? classLabels[0] : (classLabels.length > 1 ? classLabels.join(', ') : '');
        const title = String(examTitle || '').trim();
        return ['MA TRẬN', title, classText].filter(Boolean).join(' ');
      };
      const appendGroupedScanAnswerTableXml = (parts, answerVersions) => {
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        const baseVersion = unique[0] || {};
        const baseQuestions = Array.isArray(baseVersion.questions) ? baseVersion.questions : [];
        const mcEntries = cv7991AnswerEntriesByFormat(baseQuestions, 'mc');
        const tfEntries = cv7991AnswerEntriesByFormat(baseQuestions, 'tf');
        const shortEntries = cv7991AnswerEntriesByFormat(baseQuestions, 'short');
        const totalAnswerCols = mcEntries.length + tfEntries.length * 4 + shortEntries.length;
        if (!unique.length || !totalAnswerCols) return false;
        const tableWidth = ANSWER_TEXT_WIDTH_DXA_XML;
        const codeWidth = totalAnswerCols >= 24 ? 420 : 520;
        const valueWidth = Math.max(260, Math.floor((tableWidth - codeWidth) / Math.max(1, totalAnswerCols)));
        const gridWidths = [codeWidth, ...Array.from({ length: totalAnswerCols }, () => valueWidth)];
        const totalCols = totalAnswerCols + 1;
        const cellSize = totalCols >= 36 ? 14 : totalCols >= 28 ? 15 : totalCols >= 22 ? 16 : totalCols >= 16 ? 18 : 20;
        const line = totalCols >= 28 ? 170 : 190;
        const margin = totalCols >= 28 ? 12 : 18;
        const opts = (extra = {}) => answerCellOptsXml(Object.assign({
          size: cellSize,
          line,
          marginY: margin,
          marginX: margin,
          widthType: 'dxa',
          noWrap: true,
        }, extra || {}));
        const cell = (text, extra = {}) => cellTextXml(text, opts(extra));
        const rows = [];

        // Mẫu đáp án nhiều mã đề:
        // Dòng 1: "Câu" ở trên cùng.
        // Dòng 2: "Mã đề" + nhóm loại câu hỏi.
        // Dòng 3: số câu.
        // Dòng 4: a/b/c/d dưới câu Đúng-Sai; không còn chữ "Ý".
        const topQuestionRow = [
          cell('', { width: codeWidth, bold: true }),
          cell('Câu', { width: valueWidth * totalAnswerCols, colSpan: totalAnswerCols, bold: true })
        ];
        rows.push(topQuestionRow);

        const groupRow = [cell('Mã đề', { width: codeWidth, bold: true, vMerge: 'restart' })];
        if (mcEntries.length) groupRow.push(cell('Nhiều lựa chọn', { width: valueWidth * mcEntries.length, colSpan: mcEntries.length, bold: true }));
        if (tfEntries.length) groupRow.push(cell('Đúng – sai', { width: valueWidth * tfEntries.length * 4, colSpan: tfEntries.length * 4, bold: true }));
        if (shortEntries.length) groupRow.push(cell('Trả lời ngắn', { width: valueWidth * shortEntries.length, colSpan: shortEntries.length, bold: true }));
        rows.push(groupRow);

        const questionRow = [cell('', { width: codeWidth, vMerge: 'continue' })];
        mcEntries.forEach((entry) => questionRow.push(cell(String(entry.number), { width: valueWidth, bold: true })));
        tfEntries.forEach((entry) => questionRow.push(cell(String(entry.number), { width: valueWidth * 4, colSpan: 4, bold: true })));
        shortEntries.forEach((entry) => questionRow.push(cell(String(entry.number), { width: valueWidth, bold: true })));
        rows.push(questionRow);

        const subRow = [cell('', { width: codeWidth, vMerge: 'continue' })];
        mcEntries.forEach(() => subRow.push(cell('', { width: valueWidth })));
        tfEntries.forEach(() => ['a', 'b', 'c', 'd'].forEach((sub) => subRow.push(cell(sub, { width: valueWidth, bold: true }))));
        shortEntries.forEach(() => subRow.push(cell('', { width: valueWidth })));
        rows.push(subRow);
        unique.forEach((version) => {
          const questions = Array.isArray(version && version.questions) ? version.questions : [];
          const row = [cell(displayExamCode(version && version.code), { width: codeWidth, bold: true })];
          mcEntries.forEach((entry) => {
            const question = questions[entry.number - 1] || {};
            const missing = answerIsMissingForQuestion(question, 'mc', 0);
            row.push(cell(answerValueForQuestion(question, 'mc', 0), {
              width: valueWidth,
              color: '',
              bold: false
            }));
          });
          tfEntries.forEach((entry) => {
            const question = questions[entry.number - 1] || {};
            ['a', 'b', 'c', 'd'].forEach((sub, subIndex) => {
              const missing = answerIsMissingForQuestion(question, 'tf', subIndex);
              row.push(cell(answerValueForQuestion(question, 'tf', subIndex), {
                width: valueWidth,
                color: '',
                bold: false
              }));
            });
          });
          shortEntries.forEach((entry) => {
            const question = questions[entry.number - 1] || {};
            const missing = answerIsMissingForQuestion(question, 'short', 0);
            row.push(cell(answerValueForQuestion(question, 'short', 0), {
              width: valueWidth,
              color: '',
              bold: false
            }));
          });
          rows.push(row);
        });
        parts.push(tableXml(rows, { fixed: true, widthDxa: tableWidth, gridWidths }));
        return true;
      };
      const appendGroupedEssayAnswerEntriesXml = (parts, answerVersions) => {
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        const versionsWithEssay = unique.filter((version) => cv7991AnswerEntriesByFormat(version && version.questions, 'essay').length);
        if (!versionsWithEssay.length) return false;

        // Nếu người dùng chọn “Cố định đề tự luận”, phần tự luận của các mã đề là như nhau.
        // Khi đó phần ĐÁP ÁN chỉ cần in 01 lần, không chia theo từng mã đề.
        if (options && options.freezeEssay) {
          const sourceVersion = versionsWithEssay.find((version) => !(version && version.isOriginalBase)) || versionsWithEssay[0];
          cv7991AnswerEntriesByFormat(sourceVersion && sourceVersion.questions, 'essay').forEach((entry) => {
            parts.push(paraXml(textRunXml(`Câu ${entry.number}`, { bold: true }), { spacing: { before: 60, after: 0, line: 240 } }));
            appendCv7991EssayMarkingGuideXml(parts, entry.question && entry.question.answer);
          });
          return true;
        }

        versionsWithEssay.forEach((version, versionIndex) => {
          if (versionIndex > 0) parts.push(paraXml(textRunXml(''), { spacing: { before: 80, after: 0, line: 240 } }));
          parts.push(paraXml(textRunXml(`Mã đề ${displayExamCode(version && version.code)}`, { bold: true, color: '0070C0' }), { spacing: { before: 80, after: 0, line: 240 } }));
          cv7991AnswerEntriesByFormat(version && version.questions, 'essay').forEach((entry) => {
            parts.push(paraXml(textRunXml(`Câu ${entry.number}`, { bold: true }), { spacing: { before: 60, after: 0, line: 240 } }));
            appendCv7991EssayMarkingGuideXml(parts, entry.question && entry.question.answer);
          });
        });
        return true;
      };
      const appendGroupedAnswerKeyXml = (parts, answerVersions, mode = 'all') => {
        const unique = cv7991AnswerVersionsForOutputXml(answerVersions);
        if (!unique.length) return false;
        const hasScan = unique.some((version) => (Array.isArray(version && version.questions) ? version.questions : []).some((question) => question && ['mc', 'tf', 'short'].includes(String(question.format || 'mc'))));
        const hasEssay = unique.some((version) => cv7991AnswerEntriesByFormat(version && version.questions, 'essay').length);
        let appended = false;
        if (hasScan && mode !== 'essay') {
          parts.push(paraXml(textRunXml('A. TRẮC NGHIỆM', { bold: true }), { spacing: { before: 120, after: 40, line: 240 } }));
          appended = appendGroupedScanAnswerTableXml(parts, unique) || appended;
        }
        if (hasEssay && mode !== 'scan') {
          parts.push(paraXml(textRunXml('B. TỰ LUẬN', { bold: true }), { spacing: { before: 160, after: 40, line: 240 } }));
          appended = appendGroupedEssayAnswerEntriesXml(parts, unique) || appended;
        }
        return appended;
      };
      const appendMixerAnswerKeyXml = (parts, answerVersions) => {
        // Nhánh riêng cho Trộn đề: chỉ dùng paragraph thuần, tuyệt đối không tạo
        // bảng/section phụ trong phần đáp án. Cách này tương thích tốt hơn với
        // Word desktop và tránh file DOCX bị Word báo lỗi khi mở.
        const allVersions = cv7991AnswerVersionsForOutputXml(answerVersions);
        if (!allVersions.length) return false;
        const hasScan = allVersions.some((version) => {
          const qs = Array.isArray(version && version.questions) ? version.questions : [];
          return qs.some((q) => q && ['mc', 'tf', 'short'].includes(String(q.format || 'mc')));
        });
        const hasEssay = allVersions.some((version) => cv7991AnswerEntriesByFormat(version && version.questions, 'essay').length);
        let appended = false;
        const cleanAnswerText = (value) => String(value == null ? '' : value)
          .replace(/\r/g, '')
          .replace(/\[\[CV7991_(?:IMG|TBL|OMML):[^\]]+\]\]/g, ' ')
          .replace(/\s+/g, ' ')
          .trim();
        const pushAnswerLine = (text, extra = {}) => {
          const clean = cleanAnswerText(text);
          if (!clean) return;
          parts.push(paraXml(textRunXml(clean, extra.run || {}), {
            spacing: Object.assign({ before: 30, after: 0, line: 240 }, extra.spacing || {}),
            alignment: extra.alignment || 'left'
          }));
        };

        if (hasScan) {
          parts.push(paraXml(textRunXml('A. TRẮC NGHIỆM', { bold: true }), { spacing: { before: 120, after: 60, line: 240 } }));
          allVersions.forEach((version, versionIndex) => {
            const questions = Array.isArray(version && version.questions) ? version.questions : [];
            const mcEntries = cv7991AnswerEntriesByFormat(questions, 'mc');
            const tfEntries = cv7991AnswerEntriesByFormat(questions, 'tf');
            const shortEntries = cv7991AnswerEntriesByFormat(questions, 'short');
            if (!(mcEntries.length || tfEntries.length || shortEntries.length)) return;
            if (allVersions.length > 1) {
              pushAnswerLine(`MÃ ĐỀ ${displayExamCode(version && version.code)}`, {
                run: { bold: true, color: '0070C0' },
                spacing: { before: versionIndex ? 100 : 20, after: 30, line: 240 }
              });
            }
            if (mcEntries.length) {
              const chunks = cv7991AnswerChunks(mcEntries, 8);
              chunks.forEach((chunk) => pushAnswerLine(chunk.map((entry) => `Câu ${entry.number}: ${answerValueForQuestion(entry.question, 'mc', 0) || '-'}`).join('; ')));
            }
            if (tfEntries.length) {
              tfEntries.forEach((entry) => {
                const vals = ['a','b','c','d'].map((sub, idx) => `${sub}. ${answerValueForQuestion(entry.question, 'tf', idx) || '-'}`);
                pushAnswerLine(`Câu ${entry.number}: ${vals.join('; ')}`);
              });
            }
            if (shortEntries.length) {
              const chunks = cv7991AnswerChunks(shortEntries, 5);
              chunks.forEach((chunk) => pushAnswerLine(chunk.map((entry) => `Câu ${entry.number}: ${answerValueForQuestion(entry.question, 'short', 0) || '-'}`).join('; ')));
            }
            appended = true;
          });
        }

        if (hasEssay) {
          parts.push(paraXml(textRunXml('B. TỰ LUẬN', { bold: true }), { spacing: { before: 160, after: 60, line: 240 } }));
          allVersions.forEach((version, versionIndex) => {
            const essayEntries = cv7991AnswerEntriesByFormat(version && version.questions, 'essay');
            if (!essayEntries.length) return;
            if (allVersions.length > 1) {
              pushAnswerLine(`MÃ ĐỀ ${displayExamCode(version && version.code)}`, {
                run: { bold: true, color: '0070C0' },
                spacing: { before: versionIndex ? 100 : 20, after: 30, line: 240 }
              });
            }
            essayEntries.forEach((entry) => {
              const raw = String(entry.question && entry.question.answer || '').replace(/\r/g, '').trim();
              pushAnswerLine(`Câu ${entry.number}`, { run: { bold: true }, spacing: { before: 80, after: 0, line: 240 } });
              if (!raw) {
                pushAnswerLine('Chưa có đáp án.');
                return;
              }
              raw.split('\n').forEach((line) => pushAnswerLine(line));
            });
            appended = true;
          });
        }
        return appended;
      };

      const appendAnswerKeyXml = (parts, answerVersions) => {
        const allVersions = (Array.isArray(answerVersions) ? answerVersions : []).filter((version) => version && Array.isArray(version.questions));
        const versionsList = allVersions.filter((version) => !(version && version.isOriginalBase));
        const finalVersions = versionsList.length ? versionsList : allVersions;
        if (!finalVersions.length) return;
        finalVersions.forEach((version, versionIndex) => {
          const questions = Array.isArray(version && version.questions) ? version.questions : [];
          const sectionNumberMap = cv7991BuildSectionNumberMap(questions);
          if (finalVersions.length > 1) {
            if (versionIndex > 0) parts.push(paraXml(textRunXml(''), { spacing: { before: 120, after: 0, line: 240 } }));
            parts.push(paraXml(textRunXml(`MÃ ĐỀ ${displayExamCode(version && version.code)}`, { bold: true }), { alignment: 'center', spacing: { before: 120, after: 40, line: 240 } }));
          }
          CV7991_FORMATS.forEach((format) => {
            const entries = cv7991AnswerEntriesByFormat(questions, format);
            if (!entries.length) return;
            appendCv7991AnswerSectionHeadingXml(parts, format, sectionNumberMap[format]);
            if (format === 'mc') appendTwoRowAnswerTableXml(parts, entries, 'mc', { maxCols: 12 });
            else if (format === 'tf') appendTrueFalseAnswerTableXml(parts, entries);
            else if (format === 'short') appendTwoRowAnswerTableXml(parts, entries, 'short', { maxCols: 8 });
            else if (format === 'essay') appendEssayAnswerEntriesXml(parts, entries);
          });
        });
      };
      const appendSelectedExamMatrixXml = (parts, reviewRequests, answerVersions = []) => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : [])
          .filter((request) => Number(request && request.count) > 0);
        if (!selected.length) return false;

        const formats = [
          { key: 'mc', title: 'NHIỀU LỰA CHỌN' },
          { key: 'tf', title: 'ĐÚNG - SAI' },
          { key: 'short', title: 'TRẢ LỜI NGẮN' },
          { key: 'essay', title: 'TỰ LUẬN' },
        ];
        const levels = ['b', 'h', 'v', 'vdc'];
        const levelShort = { b: 'BIẾT', h: 'HIỂU', v: 'VD', vdc: 'VDC' };
        const keyOf = (format, level) => `${format}_${level}`;

        const emptyCounts = () => {
          const obj = {};
          formats.forEach((fmt) => levels.forEach((lvl) => { obj[keyOf(fmt.key, lvl)] = 0; }));
          return obj;
        };

        // Gom đúng theo từng Bài/đơn vị kiến thức đã được chọn.
        const groupMap = new Map();
        selected.forEach((request) => {
          const item = request.item || {};
          const stableKey = String(
            request.unitKey || item.unitKey || cv7991UnitKey(item.unit)
          ).trim() || `unit-${groupMap.size + 1}`;
          if (!groupMap.has(stableKey)) {
            groupMap.set(stableKey, {
              item,
              counts: emptyCounts(),
              order: groupMap.size,
            });
          }
          const group = groupMap.get(stableKey);
          const format = formats.some((fmt) => fmt.key === request.format) ? request.format : 'mc';
          const level = levels.includes(request.level) ? request.level : 'b';
          group.counts[keyOf(format, level)] += Math.max(0, Number(request.count) || 0);
        });
        const groups = Array.from(groupMap.values());
        if (!groups.length) return false;

        // Điểm dùng đúng cấu hình hiện tại:
        // MC theo 0,25/0,5/1; Đ-S tối đa 1 điểm/câu; TLN 0,5; Tự luận 1.
        const selectedQuestionCount = selected.reduce(
          (sum, request) => sum + Math.max(0, Number(request && request.count) || 0),
          0
        );
        const score = getCv7991ScoreSettings(selectedQuestionCount);
        const scoreByFormat = (format) => {
          if (format === 'tf') return Math.max(0, Number(score.trueFalseScores && score.trueFalseScores[4] || 0));
          if (format === 'short') return Math.max(0, Number(score.shortScore || 0));
          if (format === 'essay') return Math.max(0, Number(score.essayScore || 0));
          return Math.max(0, Number(score.singleScore || 0));
        };

        const groupCount = (group, format = null) => {
          let sum = 0;
          formats.forEach((fmt) => {
            if (format && fmt.key !== format) return;
            levels.forEach((lvl) => { sum += Number(group.counts[keyOf(fmt.key, lvl)] || 0); });
          });
          return sum;
        };
        const groupPoints = (group, format = null) => {
          let sum = 0;
          formats.forEach((fmt) => {
            if (format && fmt.key !== format) return;
            levels.forEach((lvl) => {
              sum += Number(group.counts[keyOf(fmt.key, lvl)] || 0) * scoreByFormat(fmt.key);
            });
          });
          return sum;
        };

        const grandCount = groups.reduce((sum, group) => sum + groupCount(group), 0);
        const grandPoints = groups.reduce((sum, group) => sum + groupPoints(group), 0);
        const countByFormat = (format) => groups.reduce((sum, group) => sum + groupCount(group, format), 0);
        const pointsByFormat = (format) => groups.reduce((sum, group) => sum + groupPoints(group, format), 0);
        const countByLevel = (level) => groups.reduce((sum, group) => sum + formats.reduce((n, fmt) => n + Number(group.counts[keyOf(fmt.key, level)] || 0), 0), 0);
        const pointsByLevel = (level) => groups.reduce((sum, group) => sum + formats.reduce((n, fmt) => n + Number(group.counts[keyOf(fmt.key, level)] || 0) * scoreByFormat(fmt.key), 0), 0);
        const pct = (value) => grandPoints > 0
          ? Math.round((Number(value) || 0) * 1000 / grandPoints) / 10
          : 0;
        const fmtScore = (value) => formatScoreValue(value).replace('.', ',');
        const fmtPct = (value) => `${formatScoreValue(value).replace('.', ',')}%`;

        // A4 ngang, lề 1,5 cm. Tổng độ rộng cột luôn đúng bằng vùng chữ,
        // nên bảng không tràn mép trái/phải dù có đủ 16 ô mức độ.
        const tableWidth = ANSWER_TEXT_WIDTH_DXA_XML;
        const ttWidth = 440;
        // Thu hẹp hai cột chữ xuống 2/3; nhường chỗ 4 cột Tổng theo mức độ.
        const chapterWidth = 1267;
        const unitWidth = 2400;
        const pctWidth = 760;
        const evalCols = formats.length * levels.length + levels.length;
        const fixedWidth = ttWidth + chapterWidth + unitWidth + pctWidth;
        const evalWidth = Math.floor((tableWidth - fixedWidth) / evalCols);
        const unitWidthAdjusted = unitWidth + (tableWidth - fixedWidth - evalWidth * evalCols);
        const gridWidths = [
          ttWidth, chapterWidth, unitWidthAdjusted,
          ...Array.from({ length: evalCols }, () => evalWidth), pctWidth,
        ];

        const totalCols = 3 + evalCols + 1;
        const fontSize = totalCols >= 20 ? 13 : 14;
        const lineHeight = totalCols >= 20 ? 165 : 180;
        const cellMargin = totalCols >= 20 ? 10 : 16;

        const mCell = (value, opts = {}) => cellTextXml(
          value == null ? '' : String(value),
          Object.assign({
            size: fontSize,
            line: lineHeight,
            lineRule: 'exact',
            marginY: cellMargin,
            marginX: cellMargin,
            widthType: 'dxa',
            verticalAlign: 'center',
            align: 'center',
          }, opts || {})
        );
        const mBlank = (opts = {}) => cellXml(
          paraXml(textRunXml('', { size: fontSize }), {
            alignment: 'center',
            spacing: { before: 0, after: 0, line: lineHeight, lineRule: 'exact' }
          }),
          Object.assign({
            marginY: cellMargin,
            marginX: cellMargin,
            widthType: 'dxa',
            verticalAlign: 'center',
          }, opts || {})
        );

        parts.push(paraXml(
          textRunXml(cv7991MatrixTitleXml(answerVersions), { bold: true, size: 22 }),
          {
            alignment: 'center',
            spacing: { before: 0, after: 45, line: 220 }
          }
        ));

        const rows = [];

        // Header giống bảng Biên soạn đề trên MVIP.
        rows.push([
          mCell('TT', { bold: true, vMerge: 'restart', width: ttWidth }),
          mCell('CHỦ ĐỀ/CHƯƠNG', { bold: true, vMerge: 'restart', width: chapterWidth }),
          mCell('NỘI DUNG/ĐƠN VỊ KIẾN THỨC', { bold: true, vMerge: 'restart', width: unitWidthAdjusted }),
          ...formats.map((fmt) => mCell(fmt.title, {
            bold: true,
            colSpan: levels.length,
            width: evalWidth * levels.length
          })),
          mCell('TỔNG', { bold: true, colSpan: levels.length, width: evalWidth * levels.length }),
          mCell('TỈ LỆ %\nĐIỂM', { bold: true, vMerge: 'restart', width: pctWidth }),
        ]);
        rows.push([
          mBlank({ vMerge: 'continue', width: ttWidth }),
          mBlank({ vMerge: 'continue', width: chapterWidth }),
          mBlank({ vMerge: 'continue', width: unitWidthAdjusted }),
          ...formats.flatMap(() => levels.map((lvl) => mCell(levelShort[lvl], {
            bold: true,
            width: evalWidth
          }))),
          ...levels.map((lvl) => mCell(levelShort[lvl], { bold: true, width: evalWidth })),
          mBlank({ vMerge: 'continue', width: pctWidth }),
        ]);

        const chapterOf = (group) => String(group && group.item && group.item.chapter || '').trim();

        groups.forEach((group, index) => {
          const chapter = chapterOf(group);
          const prevChapter = index > 0 ? chapterOf(groups[index - 1]) : '';
          const isFirstChapterRow = index === 0 || chapter !== prevChapter;
          const rowPoints = groupPoints(group);

          rows.push([
            mCell(String(index + 1), { width: ttWidth }),
            isFirstChapterRow
              ? mCell(chapter, {
                  align: 'left',
                  bold: true,
                  width: chapterWidth,
                  vMerge: 'restart'
                })
              : mBlank({ width: chapterWidth, vMerge: 'continue' }),
            mCell(group.item && group.item.unit || '', {
              align: 'left',
              bold: true,
              width: unitWidthAdjusted
            }),
            ...formats.flatMap((fmt) => levels.map((lvl) => {
              const value = Number(group.counts[keyOf(fmt.key, lvl)] || 0);
              return mCell(value > 0 ? String(value) : '', { width: evalWidth });
            })),
            ...levels.map((lvl) => {
              const value = formats.reduce((sum, fmt) => sum + Number(group.counts[keyOf(fmt.key, lvl)] || 0), 0);
              return mCell(value > 0 ? String(value) : '', { width: evalWidth, bold: true, shade: 'EFF6FF' });
            }),
            mCell(rowPoints > 0 ? fmtPct(pct(rowPoints)) : '', { width: pctWidth }),
          ]);
        });

        const footerLabel = {
          bold: true,
          colSpan: 3,
          align: 'center',
          shade: 'F8FAFC'
        };
        rows.push([
          mCell('TỔNG SỐ CÂU', footerLabel),
          ...formats.flatMap((fmt) => levels.map((lvl) => mCell(String(groups.reduce((sum, group) => sum + Number(group.counts[keyOf(fmt.key, lvl)] || 0), 0)), { bold: true, shade: 'EAFBF2' }))),
          ...levels.map((lvl) => mCell(String(countByLevel(lvl)), { bold: true, shade: 'EAFBF2' })),
          mCell(String(grandCount), { bold: true, shade: 'EAFBF2' }),
        ]);
        rows.push([
          mCell('TỔNG SỐ ĐIỂM', footerLabel),
          ...formats.map((fmt) => mCell(fmtScore(pointsByFormat(fmt.key)), { bold: true, shade: 'FFF7ED', colSpan: levels.length, width: evalWidth * levels.length })),
          ...levels.map((lvl) => mCell(fmtScore(pointsByLevel(lvl)), { bold: true, shade: 'FFF7ED' })),
          mCell(fmtScore(grandPoints), { bold: true, shade: 'FFF7ED' }),
        ]);
        rows.push([
          mCell('TỶ LỆ %', footerLabel),
          ...formats.map((fmt) => mCell(fmtPct(pct(pointsByFormat(fmt.key))), { bold: true, shade: 'EFF6FF', colSpan: levels.length, width: evalWidth * levels.length })),
          ...levels.map((lvl) => mCell(fmtPct(pct(pointsByLevel(lvl))), { bold: true, shade: 'EFF6FF' })),
          mCell(grandPoints > 0 ? '100%' : '0%', { bold: true, shade: 'EFF6FF' }),
        ]);

        parts.push(tableXml(rows, {
          fixed: true,
          widthDxa: tableWidth,
          gridWidths
        }));
        parts.push(paraXml(textRunXml(''), {
          spacing: { before: 40, after: 20, line: 180 }
        }));
        return true;
      };

      const appendMatrixSpecXml = (parts, reviewRequests, sourceQuestions = [], title = 'MA TRẬN VÀ BẢNG ĐẶC TẢ') => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        if (!selected.length) return;
        const sourceVersions = Array.isArray(sourceQuestions) ? sourceQuestions : [];
        const flatSourceQuestions = sourceVersions.flatMap((entry) => Array.isArray(entry && entry.questions) ? entry.questions : (entry && entry.format ? [entry] : []));
        const showSpecQuestionNumbers = !!(options && options.showSpecQuestionNumbers);
        const questionNumbersByCell = new Map();
        if (showSpecQuestionNumbers) {
          const firstVersion = sourceVersions.find((entry) => entry && Array.isArray(entry.questions));
          const questionsForNumbers = firstVersion ? firstVersion.questions : flatSourceQuestions;
          (Array.isArray(questionsForNumbers) ? questionsForNumbers : []).forEach((question, questionIndex) => {
            const key = `${cv7991UnitKey(question && question.unit)}|${String(question && question.format || 'mc')}|${String(question && question.level || 'b')}`;
            if (!questionNumbersByCell.has(key)) questionNumbersByCell.set(key, []);
            questionNumbersByCell.get(key).push(questionIndex + 1);
          });
        }
        const specValueForCell = (unit, format, level, countValue) => {
          const count = Number(countValue || 0);
          if (!count) return '';
          if (!showSpecQuestionNumbers) return String(count);
          const key = `${cv7991UnitKey(unit)}|${format}|${level}`;
          const numbers = questionNumbersByCell.get(key) || [];
          return numbers.length ? numbers.map((number) => `Câu ${number}`).join(', ') : String(count);
        };
        const competencyMap = new Map();
        const addCompetencyToMap = (question) => {
          const unitKey = cv7991UnitKey(question && question.unit);
          const format = String(question && question.format || '').trim();
          const level = String(question && question.level || '').trim();
          if (!unitKey || !format || !level) return;
          const competency = String(question && question.competency || cv7991CompetencyFromLine(question && question.answer) || cv7991CompetencyFromLine(question && question.text) || '').trim();
          if (!competency) return;
          const key = `${unitKey}|${format}|${level}`;
          if (!competencyMap.has(key)) competencyMap.set(key, []);
          const list = competencyMap.get(key);
          if (!list.includes(competency)) list.push(competency);
        };
        flatSourceQuestions.forEach(addCompetencyToMap);
        const competencyForCell = (unit, format, level) => {
          const key = `${cv7991UnitKey(unit)}|${format}|${level}`;
          return (competencyMap.get(key) || []).join(', ');
        };
        const formats = [
          { key: 'mc', title: 'Nhiều lựa chọn' },
          { key: 'tf', title: 'Đúng - Sai' },
          { key: 'short', title: 'Trả lời ngắn' },
          { key: 'essay', title: 'Tự luận' },
        ];
        const includeVdc = selected.some((request) => String(request && request.level || '').trim().toLowerCase() === 'vdc');
        const levels = includeVdc ? ['b', 'h', 'v', 'vdc'] : ['b', 'h', 'v'];
        const levelShort = { b: 'Biết', h: 'Hiểu', v: 'VD', vdc: 'VDC' };
        const levelFull = { b: 'Biết', h: 'Hiểu', v: 'Vận dụng', vdc: 'Vận dụng cao' };
        const selectedQuestionCount = selected.reduce((sum, request) => sum + Math.max(0, Number(request && request.count) || 0), 0);
        const score = getCv7991ScoreSettings(selectedQuestionCount);
        const scoreByFormat = (format) => {
          if (format === 'tf') return Math.max(0, Number(score.trueFalseScores && score.trueFalseScores[4] || 0));
          if (format === 'short') return Math.max(0, Number(score.shortScore || 0));
          if (format === 'essay') return Math.max(0, Number(score.essayScore || 0));
          return Math.max(0, Number(score.singleScore || 0));
        };
        const fmtLevelKey = (format, level) => `${format}_${level}`;
        const makeEmptyCounts = () => {
          const obj = {};
          formats.forEach((fmt) => levels.forEach((lvl) => { obj[fmtLevelKey(fmt.key, lvl)] = 0; }));
          return obj;
        };
        const groupMap = new Map();
        selected.forEach((request) => {
          const item = request.item || {};
          const key = String(request.unitKey || item.unitKey || cv7991UnitKey(item.unit)).trim() || `unit-${groupMap.size + 1}`;
          if (!groupMap.has(key)) {
            groupMap.set(key, {
              item,
              counts: makeEmptyCounts(),
              order: groupMap.size,
            });
          }
          const group = groupMap.get(key);
          const format = formats.some((fmt) => fmt.key === request.format) ? request.format : 'mc';
          const level = levels.includes(request.level) ? request.level : 'b';
          group.counts[fmtLevelKey(format, level)] += Math.max(0, Number(request.count) || 0);
        });
        const groups = Array.from(groupMap.values());
        const calcGroupCount = (group, format = null, level = null) => {
          let sum = 0;
          formats.forEach((fmt) => {
            if (format && fmt.key !== format) return;
            levels.forEach((lvl) => {
              if (level && lvl !== level) return;
              sum += Number(group.counts[fmtLevelKey(fmt.key, lvl)] || 0);
            });
          });
          return sum;
        };
        const calcGroupPoints = (group, format = null, level = null) => {
          let sum = 0;
          formats.forEach((fmt) => {
            if (format && fmt.key !== format) return;
            levels.forEach((lvl) => {
              if (level && lvl !== level) return;
              sum += Number(group.counts[fmtLevelKey(fmt.key, lvl)] || 0) * scoreByFormat(fmt.key);
            });
          });
          return sum;
        };
        const grandCount = groups.reduce((sum, group) => sum + calcGroupCount(group), 0);
        const grandPoints = groups.reduce((sum, group) => sum + calcGroupPoints(group), 0);
        const totalCountByFormat = (format) => groups.reduce((sum, group) => sum + calcGroupCount(group, format), 0);
        const totalPointsByFormat = (format) => groups.reduce((sum, group) => sum + calcGroupPoints(group, format), 0);
        const totalCountByLevel = (level) => groups.reduce((sum, group) => sum + calcGroupCount(group, null, level), 0);
        const totalPointsByLevel = (level) => groups.reduce((sum, group) => sum + calcGroupPoints(group, null, level), 0);
        const pct = (value, total = grandPoints) => total > 0 ? Math.round((Number(value) || 0) * 1000 / total) / 10 : 0;
        const fmtScore = (value) => formatScoreValue(value).replace('.', ',');
        const fmtPct = (value) => `${formatScoreValue(value).replace('.', ',')}%`;
        const matrixWidth = ANSWER_TEXT_WIDTH_DXA_XML;
        // Chừa chỗ cho 4 cột Tổng; thu hẹp Chương và Nội dung như bảng trên web.
        const matrixBaseWidths = [420, 2700, 5300];
        const matrixPctWidth = 500;
        const matrixEvalCols = formats.length * levels.length + levels.length;
        const matrixEvalWidth = Math.floor((matrixWidth - matrixBaseWidths.reduce((a, b) => a + b, 0) - matrixPctWidth) / matrixEvalCols);
        matrixBaseWidths[2] += matrixWidth - matrixBaseWidths.reduce((a, b) => a + b, 0) - matrixPctWidth - matrixEvalWidth * matrixEvalCols;
        const matrixGrid = [...matrixBaseWidths, ...Array.from({ length: matrixEvalCols }, () => matrixEvalWidth), matrixPctWidth];
        const mCell = (text, opts = {}) => cellTextXml(text, Object.assign({
          size: 16,
          line: 190,
          lineRule: 'exact',
          marginY: 20,
          marginX: 35,
          widthType: 'dxa',
          verticalAlign: 'center',
          align: 'center',
        }, opts || {}));
        const mBlank = (opts = {}) => cellXml(paraXml(textRunXml('', { size: 16 }), { alignment: 'center', spacing: { before: 0, after: 0, line: 190, lineRule: 'exact' } }), Object.assign({ marginY: 20, marginX: 35, widthType: 'dxa', verticalAlign: 'center' }, opts || {}));
        const levelCells = (opts = {}) => levels.map((lvl) => mCell(levelShort[lvl], Object.assign({ bold: true }, opts || {})));

        parts.push(simpleParaTextXml('1. MA TRẬN ĐỀ KIỂM TRA ĐỊNH KÌ', { bold: true, size: 24, spacing: { before: 0, after: 60, line: 240 } }));
        const matrixRows = [];
        matrixRows.push([
          mCell('TT', { bold: true, vMerge: 'restart', width: matrixBaseWidths[0] }),
          mCell('Chủ đề/Chương', { bold: true, vMerge: 'restart', width: matrixBaseWidths[1] }),
          mCell('Nội dung/đơn vị kiến thức', { bold: true, vMerge: 'restart', width: matrixBaseWidths[2] }),
          ...formats.map((fmt) => mCell(fmt.title, { bold: true, colSpan: levels.length, width: matrixEvalWidth * levels.length })),
          mCell('Tổng', { bold: true, colSpan: levels.length, width: matrixEvalWidth * levels.length }),
          mCell('Tỉ lệ % điểm', { bold: true, vMerge: 'restart', width: matrixPctWidth }),
        ]);
        matrixRows.push([
          mBlank({ vMerge: 'continue' }),
          mBlank({ vMerge: 'continue' }),
          mBlank({ vMerge: 'continue' }),
          ...formats.flatMap(() => levelCells()),
          ...levelCells(),
          mBlank({ vMerge: 'continue' }),
        ]);
        const normalizedChapterForGroup = (group) => String(group && group.item && group.item.chapter || '').trim();
        groups.forEach((group, index) => {
          const rowPoints = calcGroupPoints(group);
          const chapter = normalizedChapterForGroup(group);
          const prevChapter = index > 0 ? normalizedChapterForGroup(groups[index - 1]) : '';
          const isFirstChapterRow = index === 0 || chapter !== prevChapter;
          matrixRows.push([
            mCell(String(index + 1), { width: matrixBaseWidths[0] }),
            isFirstChapterRow
              ? mCell(group.item && group.item.chapter || '', { align: 'left', bold: true, width: matrixBaseWidths[1], vMerge: 'restart' })
              : mBlank({ width: matrixBaseWidths[1], vMerge: 'continue' }),
            mCell(group.item && group.item.unit || '', { align: 'left', bold: true, width: matrixBaseWidths[2] }),
            ...formats.flatMap((fmt) => levels.map((lvl) => {
              const value = group.counts[fmtLevelKey(fmt.key, lvl)] || 0;
              return mCell(value ? String(value) : '', { width: matrixEvalWidth });
            })),
            ...levels.map((lvl) => mCell(String(calcGroupCount(group, null, lvl) || ''), { bold: true, width: matrixEvalWidth, shade: 'EFF6FF' })),
            mCell(rowPoints ? fmtPct(pct(rowPoints)) : '', { width: matrixPctWidth }),
          ]);
        });
        const footerLabelOpts = { bold: true, colSpan: matrixBaseWidths.length, align: 'center', shade: 'F8FAFC' };
        matrixRows.push([
          mCell('Tổng số câu', footerLabelOpts),
          ...formats.flatMap((fmt) => levels.map((lvl) => mCell(String(groups.reduce((sum, group) => sum + calcGroupCount(group, fmt.key, lvl), 0)), { bold: true, shade: 'EAFBF2' }))),
          ...levels.map((lvl) => mCell(String(totalCountByLevel(lvl)), { bold: true, shade: 'EAFBF2' })),
          mCell(String(grandCount), { bold: true, shade: 'EAFBF2' }),
        ]);
        matrixRows.push([
          mCell('Tổng số điểm', footerLabelOpts),
          ...formats.map((fmt) => mCell(fmtScore(totalPointsByFormat(fmt.key)), { bold: true, shade: 'FFF7ED', colSpan: levels.length, width: matrixEvalWidth * levels.length })),
          ...levels.map((lvl) => mCell(fmtScore(totalPointsByLevel(lvl)), { bold: true, shade: 'FFF7ED' })),
          mCell(fmtScore(grandPoints), { bold: true, shade: 'FFF7ED' }),
        ]);
        matrixRows.push([
          mCell('Tỉ lệ %', footerLabelOpts),
          ...formats.map((fmt) => mCell(fmtPct(pct(totalPointsByFormat(fmt.key))), { bold: true, shade: 'EFF6FF', colSpan: levels.length, width: matrixEvalWidth * levels.length })),
          ...levels.map((lvl) => mCell(fmtPct(pct(totalPointsByLevel(lvl))), { bold: true, shade: 'EFF6FF' })),
          mCell(grandPoints ? '100%' : '0%', { bold: true, shade: 'EFF6FF' }),
        ]);
        parts.push(tableXml(matrixRows, { fixed: true, widthDxa: matrixWidth, gridWidths: matrixGrid }));
        parts.push(pageBreakParaXml());

        const specWidth = ANSWER_TEXT_WIDTH_DXA_XML;
        const specBaseWidths = [380, 1200, 3500, 3100];
        const remainingSpec = specWidth - specBaseWidths.reduce((a, b) => a + b, 0);
        const specEvalWidth = Math.max(230, Math.floor(remainingSpec / (formats.length * levels.length)));
        const specGrid = [...specBaseWidths, ...Array.from({ length: formats.length * levels.length }, () => specEvalWidth)];
        const sCell = (text, opts = {}) => cellTextXml(text, Object.assign({
          size: 15,
          line: 180,
          lineRule: 'exact',
          marginY: 18,
          marginX: 30,
          widthType: 'dxa',
          verticalAlign: 'center',
          align: 'center',
        }, opts || {}));
        const sBlank = (opts = {}) => cellXml(paraXml(textRunXml('', { size: 15 }), { alignment: 'center', spacing: { before: 0, after: 0, line: 180, lineRule: 'exact' } }), Object.assign({ marginY: 18, marginX: 30, widthType: 'dxa', verticalAlign: 'center' }, opts || {}));
        const sCountCell = (value, competency, opts = {}) => {
          const textValue = String(value == null ? '' : value).trim();
          const compValue = String(competency || '').trim();
          if (!textValue && !compValue) return sCell('', opts);
          const content = `${textRunXml(textValue, { size: 15, bold: !!opts.bold })}${compValue ? `<w:r><w:br/></w:r>${textRunXml(compValue, { size: 13, italics: true })}` : ''}`;
          return cellXml(paraXml(content, { alignment: opts.align || 'center', spacing: { before: 0, after: 0, line: 220, lineRule: 'exact' } }), Object.assign({ marginY: 18, marginX: 30, widthType: 'dxa', verticalAlign: 'center' }, opts || {}));
        };
        const specRows = [];
        parts.push(simpleParaTextXml('2. BẢN ĐẶC TẢ ĐỀ KIỂM TRA ĐỊNH KÌ', { bold: true, size: 24, spacing: { before: 0, after: 60, line: 240 } }));
        specRows.push([
          sCell('TT', { bold: true, vMerge: 'restart', width: specBaseWidths[0] }),
          sCell('Chủ đề/Chương', { bold: true, vMerge: 'restart', width: specBaseWidths[1] }),
          sCell('Nội dung/đơn vị kiến thức', { bold: true, vMerge: 'restart', width: specBaseWidths[2] }),
          sCell('Yêu cầu cần đạt', { bold: true, vMerge: 'restart', width: specBaseWidths[3] }),
          sCell('Số câu hỏi ở các mức độ đánh giá', { bold: true, colSpan: formats.length * levels.length }),
        ]);
        specRows.push([
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          mCell('Các dạng câu hỏi', { bold: true, colSpan: formats.length * levels.length, size: 15, line: 180, marginY: 18, marginX: 30 }),
        ]);
        specRows.push([
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          ...formats.map((fmt) => sCell(fmt.title, { bold: true, italics: fmt.key !== 'essay', colSpan: levels.length })).flat(),
        ]);
        specRows.push([
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          sBlank({ vMerge: 'continue' }),
          ...formats.flatMap(() => levels.map((lvl) => sCell(levelShort[lvl], { bold: true }))),
        ]);
        groups.forEach((group, index) => {
          const activeLevels = levels.filter((lvl) => formats.some((fmt) => Number(group.counts[fmtLevelKey(fmt.key, lvl)] || 0) > 0));
          const rowLevels = activeLevels.length ? activeLevels : levels.filter((lvl) => String(group.item && group.item.requirements && group.item.requirements[lvl] || '').trim()).slice(0, 1);
          const finalLevels = rowLevels.length ? rowLevels : ['b'];
          const chapter = normalizedChapterForGroup(group);
          const prevChapter = index > 0 ? normalizedChapterForGroup(groups[index - 1]) : '';
          const isFirstChapterGroup = index === 0 || chapter !== prevChapter;
          finalLevels.forEach((lvl, rowIndex) => {
            const reqText = String(group.item && group.item.requirements && group.item.requirements[lvl] || '').trim();
            const yccd = reqText ? `- ${levelFull[lvl]}: ${reqText}` : `- ${levelFull[lvl]}...`;
            specRows.push([
              rowIndex === 0 ? sCell(String(index + 1), { vMerge: 'restart', width: specBaseWidths[0] }) : sBlank({ vMerge: 'continue' }),
              (isFirstChapterGroup && rowIndex === 0)
                ? sCell(group.item && group.item.chapter || '', { align: 'left', bold: true, vMerge: 'restart', width: specBaseWidths[1] })
                : sBlank({ vMerge: 'continue' }),
              rowIndex === 0 ? sCell(group.item && group.item.unit || '', { align: 'left', bold: true, vMerge: 'restart', width: specBaseWidths[2] }) : sBlank({ vMerge: 'continue' }),
              sCell(yccd, { align: 'left', width: specBaseWidths[3] }),
              ...formats.flatMap((fmt) => levels.map((innerLvl) => {
                const value = innerLvl === lvl ? Number(group.counts[fmtLevelKey(fmt.key, innerLvl)] || 0) : 0;
                const competency = value ? competencyForCell(group.item && group.item.unit || '', fmt.key, innerLvl) : '';
                return sCountCell(specValueForCell(group.item && group.item.unit || '', fmt.key, innerLvl, value), competency, { width: specEvalWidth });
              })),
            ]);
          });
        });
        specRows.push([
          sCell('Tổng số câu', { bold: true, colSpan: specBaseWidths.length, shade: 'F8FAFC' }),
          ...formats.map((fmt) => sCell(String(totalCountByFormat(fmt.key)), { bold: true, colSpan: levels.length, shade: 'EAFBF2' })).flat(),
        ]);
        specRows.push([
          sCell('Tổng số điểm', { bold: true, colSpan: specBaseWidths.length, shade: 'F8FAFC' }),
          ...formats.map((fmt) => sCell(fmtScore(totalPointsByFormat(fmt.key)), { bold: true, colSpan: levels.length, shade: 'FFF7ED' })).flat(),
        ]);
        specRows.push([
          sCell('Tỉ lệ %', { bold: true, colSpan: specBaseWidths.length, shade: 'F8FAFC' }),
          ...formats.map((fmt) => sCell(fmtPct(pct(totalPointsByFormat(fmt.key))), { bold: true, colSpan: levels.length, shade: 'EFF6FF' })).flat(),
        ]);
        parts.push(tableXml(specRows, { fixed: true, widthDxa: specWidth, gridWidths: specGrid }));
      };
      const cv7991SafeDocxFileNameLocal = (value, fallback = 'de_kiem_tra_CV7991') => {
        const base = String(value || fallback).trim() || fallback;
        return base
          .replace(/[\\/:*?"<>|]+/g, '_')
          .replace(/\s+/g, ' ')
          .replace(/[. ]+$/g, '')
          .slice(0, 120) || fallback;
      };
      const wordTemplate = (options && options.wordTemplate && typeof options.wordTemplate === 'object') ? options.wordTemplate : {};
      const wordTemplateModeRaw = String(wordTemplate.mode || 'form2').trim().toLowerCase();
      const wordTemplateMode = ['form1','form2','form3','form4','form5'].includes(wordTemplateModeRaw) ? wordTemplateModeRaw : 'form2';
      const wordTemplateBaseMode = wordTemplateMode === 'form4' ? 'form2' : (wordTemplateMode === 'form5' ? 'form3' : wordTemplateMode);
      const wordTemplateDirectMode = ['form1','form2','form3'].includes(wordTemplateMode);
      const wordTemplateEssayLineCount = Math.max(1, Math.min(100, Math.floor(Number(wordTemplate.essayLineCount) || 3)));
      const wordTemplateEvenPagesPerCode = !!wordTemplate.evenPagesPerCode;
      const examTitle = String(wordTemplate.examTitle || options && options.examTitle || '').replace(/\[\[CV7991_(?:IMG|TBL|OMML):[^\]]+\]\]/g, ' ').replace(/\s+/g, ' ').trim() || 'Đề kiểm tra theo CV7991';
      const cv7991WordTemplateSafeText = (value, fallback = '') => String(value == null ? '' : value).replace(/\[\[CV7991_(?:IMG|TBL|OMML):[^\]]+\]\]/g, ' ').replace(/\s+/g, ' ').trim() || fallback;
      const cv7991WordTemplateUpper = (value, fallback = '') => cv7991WordTemplateSafeText(value, fallback).toUpperCase();
      const cv7991WordTemplateMeta = {
        district: cv7991WordTemplateUpper(wordTemplate.district, '[TÊN XÃ (SỞ)]'),
        school: cv7991WordTemplateUpper(wordTemplate.school, '[TÊN TRƯỜNG]'),
        schoolYear: cv7991WordTemplateUpper(wordTemplate.schoolYear, '[NĂM HỌC]'),
        duration: cv7991WordTemplateSafeText(wordTemplate.duration, '[Thời gian làm bài]'),
      };
      const cv7991WordTemplateSubjectLabel = (version) => {
        const parsed = typeof parseClassSubjectNameForDialog === 'function' ? parseClassSubjectNameForDialog(version && version.mon || '') : null;
        const subject = cv7991WordTemplateSafeText(parsed && parsed.subject || '');
        const grade = cv7991WordTemplateSafeText(parsed && parsed.grade || '');
        return cv7991WordTemplateSafeText([subject, grade].filter(Boolean).join(' '), cv7991WordTemplateSafeText(version && version.mon || '', '[MÔN LỚP]'));
      };
      const cv7991WordTemplateIsSingleExamVersion = (version) => !!(
        (version && version.isSingleExam)
        || (options && options.singleExam)
        || (state.cv7991PendingExport && state.cv7991PendingExport.singleExam)
      );
      const cv7991WordTemplateCanAutoFillStudent = (version) => !!cv7991WordTemplateSafeText(version && version.studentId || '');
      const cv7991WordTemplateStudentName = (version) => cv7991WordTemplateIsSingleExamVersion(version)
        ? '..............'
        : (cv7991WordTemplateCanAutoFillStudent(version)
          ? cv7991WordTemplateSafeText(version && version.studentName || '', '[Họ và tên học sinh]')
          : '[Họ và tên học sinh]');
      const cv7991WordTemplateClassLabel = (version) => cv7991WordTemplateIsSingleExamVersion(version)
        ? '.......'
        : (cv7991WordTemplateCanAutoFillStudent(version)
          ? cv7991WordTemplateSafeText(version && version.classLabel || '', '[tên lớp]')
          : '[tên lớp]');
      const cv7991Form3HeaderXml = (version, codeText) => {
        const subjectText = cv7991WordTemplateSubjectLabel(version);
        const nameText = cv7991WordTemplateStudentName(version);
        const classText = cv7991WordTemplateClassLabel(version);
        const titleText = cv7991WordTemplateSafeText(examTitle, '[Tên đề kiểm tra]');
        const rawYear = cv7991WordTemplateMeta.schoolYear;
        const yearText = /^\[.*\]$/.test(rawYear) ? rawYear : rawYear.replace(/\s*[-–—]\s*/g, ' – ');
        const leftWidth = Math.round(TEXT_WIDTH_DXA_XML * 0.38);
        const rightWidth = TEXT_WIDTH_DXA_XML - leftWidth;
        const topLeft = [
          paraXml(textRunXml(cv7991WordTemplateSafeText(wordTemplate.district, '[Tên xã (Sở)]'), { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
          paraXml(textRunXml(cv7991WordTemplateSafeText(wordTemplate.school, '[Tên trường]')), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
        ].join('');
        const topRight = [
          paraXml(textRunXml(titleText), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
          paraXml(textRunXml('MÔN: ', { bold: true }) + textRunXml(subjectText, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
          paraXml(textRunXml('NĂM HỌC: ', { bold: true }) + textRunXml(yearText, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
          paraXml(textRunXml(`Thời gian làm bài: ${cv7991WordTemplateMeta.duration}, không kể thời gian giao đề`, { italics: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }),
        ].join('');
        const topTable = tableXml([[
          cellXml(topLeft, { noBorder: true, width: leftWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 0, marginX: 0 }),
          cellXml(topRight, { noBorder: true, width: rightWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 0, marginX: 0 }),
        ]], { noBorder: true, fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths: [leftWidth, rightWidth] });
        const nameWidth = Math.round(TEXT_WIDTH_DXA_XML * 0.58);
        const classWidth = Math.round(TEXT_WIDTH_DXA_XML * 0.23);
        const codeWidth = TEXT_WIDTH_DXA_XML - nameWidth - classWidth;
        const infoTable = tableXml([[
          cellXml(paraXml(textRunXml('Họ và tên: ') + textRunXml(nameText), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: nameWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 0, marginX: 0 }),
          cellXml(paraXml(textRunXml('Lớp: ') + textRunXml(classText), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: classWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 0, marginX: 0 }),
          cellXml(paraXml(textRunXml(`MÃ ĐỀ ${codeText}`, { bold: true }), { alignment: 'right', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: codeWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 0, marginX: 0 }),
        ]], { noBorder: true, fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths: [nameWidth, classWidth, codeWidth] });
        return topTable
          + paraXml(textRunXml(''), { spacing: { before: 0, after: 0, line: 180, lineRule: 'exact' } })
          + infoTable
          + paraXml(textRunXml(''), { spacing: { before: 0, after: 0, line: 240, lineRule: 'exact' } });
      };
      const cv7991ExamHeaderXml = (title, nameText, classText, codeText) => tableXml([
        [
          cellXml(paraXml(runsWithImagesXml(title, { italics: true }), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: '3500' }),
          cellXml(paraXml(textRunXml(`MÃ ĐỀ ${codeText}`, { bold: true }), { alignment: 'right', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: '1500' }),
        ],
        [
          cellXml(paraXml(textRunXml('Họ và tên: ') + textRunXml(nameText, { bold: true }), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: '3500' }),
          cellXml(paraXml(textRunXml(`Lớp: ${classText}`), { alignment: 'right', spacing: { before: 0, after: 0, line: 240 } }), { noBorder: true, width: '1500' }),
        ],
      ], { noBorder: true });
      const cv7991Form1CutLineXml = () => `<w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr><w:r><w:pict><v:shapetype id="_x0000_t32" coordsize="21600,21600" o:spt="32" o:oned="t" path="m,l21600,21600e" filled="f"><v:path arrowok="t" fillok="f" o:connecttype="none"/><o:lock v:ext="edit" shapetype="t"/></v:shapetype><v:shape id="_x0000_s7991cut" type="#_x0000_t32" style="position:absolute;margin-left:-42.55pt;margin-top:-0.4pt;width:593.6pt;height:.8pt;z-index:251658240;mso-position-horizontal-relative:text;mso-position-vertical-relative:text" o:connectortype="straight"><v:stroke dashstyle="1 1" endcap="round"/></v:shape></w:pict></w:r></w:p>`;
      const cv7991Form1CutSpacerTableXml = () => {
        // Chừa 1 cm để cắt phách. Nét đứt nằm giữa chính xác ở ranh giới hai nửa 0,5 cm.
        const half = 284; // 0,5 cm, đơn vị twip (2 hàng = 568 twip)
        const width = TEXT_WIDTH_DXA_XML;
        const border = '<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:right w:val="nil"/><w:bottom w:val="nil"/><w:insideH w:val="dashed" w:sz="5" w:color="555555"/><w:insideV w:val="nil"/></w:tblBorders>';
        const row = `<w:tr><w:trPr><w:trHeight w:val="${half}" w:hRule="exact"/><w:cantSplit/></w:trPr><w:tc><w:tcPr><w:tcW w:w="${width}" w:type="dxa"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tcMar></w:tcPr><w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p></w:tc></w:tr>`;
        return `<w:tbl><w:tblPr><w:tblW w:w="${width}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${border}</w:tblPr><w:tblGrid><w:gridCol w:w="${width}"/></w:tblGrid>${row}${row}</w:tbl>`;
      };
      const cv7991Form1TopHeaderXml = (version) => {
        // Form 1 Soạn đề: bố cục trùng Form 1 của Trộn đề (khung tiêu đề 4400/6066,
        // không có viền, 2 dòng bên trái và 4 dòng bên phải, không thêm dòng cách bên dưới).
        const subjectText = cv7991WordTemplateSubjectLabel(version).toUpperCase();
        const headerTitle = cv7991WordTemplateSafeText(examTitle, 'ĐỀ KIỂM TRA').toUpperCase();
        const rawYear = cv7991WordTemplateMeta.schoolYear;
        const yearText = /^\[.*\]$/.test(rawYear)
          ? rawYear
          : rawYear.replace(/\s*[-–—]\s*/g, ' – ');
        const durationText = cv7991WordTemplateMeta.duration;
        const leftWidth = 4400;
        const rightWidth = TEXT_WIDTH_DXA_XML - leftWidth;
        const leftContent = [
          paraXml(textRunXml(cv7991WordTemplateMeta.district, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 220, lineRule: 'auto' } }),
          paraXml(textRunXml(cv7991WordTemplateMeta.school), { alignment: 'center', spacing: { before: 0, after: 0, line: 220, lineRule: 'auto' } }),
        ].join('');
        const rightContent = [
          paraXml(textRunXml(headerTitle, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240, lineRule: 'auto' } }),
          paraXml(textRunXml(`MÔN: ${subjectText}`, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240, lineRule: 'auto' } }),
          paraXml(textRunXml(`NĂM HỌC: ${yearText}`, { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240, lineRule: 'auto' } }),
          paraXml(textRunXml(`Thời gian làm bài: ${durationText} phút, không kể thời gian giao đề`, { italics: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240, lineRule: 'auto' } }),
        ].join('');
        return tableXml([[
          cellXml(leftContent, { noBorder: true, width: leftWidth, widthType: 'dxa', verticalAlign: 'top', marginY: 0, marginX: 80 }),
          cellXml(rightContent, { noBorder: true, width: rightWidth, widthType: 'dxa', verticalAlign: 'center', marginY: 40, marginX: 80 }),
        ]], { noBorder: true, fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths: [leftWidth, rightWidth] });
      };
      const cv7991Form1InfoTopTableXml = (version, codeText) => {
        const nameText = cv7991WordTemplateStudentName(version);
        const classText = cv7991WordTemplateClassLabel(version);
        const nameWidth = 5387;
        const classWidth = 1507;
        const sbdWidth = TEXT_WIDTH_DXA_XML - nameWidth - classWidth;
        return tableXml([
          [
            cellXml(paraXml(textRunXml('Họ và tên học sinh: ') + textRunXml(nameText, { bold: true }), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: nameWidth, widthType: 'dxa', verticalAlign: 'center' }),
            cellXml(paraXml(textRunXml('Lớp: ') + textRunXml(classText, { bold: true }), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: classWidth, widthType: 'dxa', verticalAlign: 'center' }),
            cellXml(paraXml(textRunXml('Số báo danh:'), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: sbdWidth, widthType: 'dxa', verticalAlign: 'center' })
          ],
          [
            cellXml(paraXml(textRunXml('Giám thị 1:'), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: nameWidth, widthType: 'dxa', verticalAlign: 'center' }),
            cellXml(paraXml(textRunXml('Giám thị 2:'), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { colSpan: 2, width: classWidth + sbdWidth, widthType: 'dxa', verticalAlign: 'center' })
          ],
          [
            cellXml(paraXml(textRunXml(`MÃ ĐỀ ${codeText}`, { bold: true, size: 28 }), { alignment: 'left', spacing: { before: 0, after: 0, line: 280 } }), { width: nameWidth, widthType: 'dxa', verticalAlign: 'center' }),
            cellXml(paraXml(textRunXml('SỐ PHÁCH:', { size: 24 }), { alignment: 'left', spacing: { before: 0, after: 0, line: 280 } }), { colSpan: 2, width: classWidth + sbdWidth, widthType: 'dxa', verticalAlign: 'center' })
          ]
        ], { fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths: [nameWidth, classWidth, sbdWidth], rowHeights: [350, 350, 380] });
      };
      const cv7991Form1InfoBottomTableXml = (codeText) => {
        const leftWidth = 5387;
        const rightWidth = TEXT_WIDTH_DXA_XML - leftWidth;
        return tableXml([[
          cellXml(paraXml(textRunXml(`MÃ ĐỀ ${codeText}`, { bold: true, size: 28 }), { alignment: 'left', spacing: { before: 0, after: 0, line: 280 } }), { width: leftWidth, widthType: 'dxa', verticalAlign: 'center' }),
          cellXml(paraXml(textRunXml('SỐ PHÁCH:', { size: 24 }), { alignment: 'left', spacing: { before: 0, after: 0, line: 280 } }), { width: rightWidth, widthType: 'dxa', verticalAlign: 'center' })
        ]], { fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths: [leftWidth, rightWidth], rowHeights: [380] });
      };
      const cv7991Form1ScoreTableXml = () => {
        const grid = [1530, 2120, 3400, TEXT_WIDTH_DXA_XML - 1530 - 2120 - 3400];
        const borderXml = '<w:tblBorders><w:top w:val="single" w:sz="4" w:color="000000"/><w:left w:val="single" w:sz="4" w:color="000000"/><w:bottom w:val="single" w:sz="4" w:color="000000"/><w:right w:val="single" w:sz="4" w:color="000000"/><w:insideH w:val="single" w:sz="4" w:color="000000"/><w:insideV w:val="single" w:sz="4" w:color="000000"/></w:tblBorders>';
        const row1 = `<w:tr><w:trPr><w:trHeight w:val="350" w:hRule="exact"/></w:trPr>${[
          cellXml(paraXml(textRunXml('Điểm', { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { colSpan: 2, width: grid[0] + grid[1], widthType: 'dxa', verticalAlign: 'center', marginY: 0 }),
          cellXml(paraXml(textRunXml('Người chấm thứ nhất', { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[2], widthType: 'dxa', verticalAlign: 'center', marginY: 0 }),
          cellXml(paraXml(textRunXml('Người chấm thứ hai', { bold: true }), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[3], widthType: 'dxa', verticalAlign: 'center', marginY: 0 }),
        ].join('')}</w:tr>`;
        const row2 = `<w:tr><w:trPr><w:trHeight w:val="850" w:hRule="exact"/></w:trPr>${[
          cellXml(paraXml(textRunXml('Bằng số'), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[0], widthType: 'dxa', verticalAlign: 'top', marginY: 40 }),
          cellXml(paraXml(textRunXml('Bằng chữ'), { alignment: 'center', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[1], widthType: 'dxa', verticalAlign: 'top', marginY: 40 }),
          cellXml(paraXml(textRunXml(''), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[2], widthType: 'dxa', verticalAlign: 'top', marginY: 40 }),
          cellXml(paraXml(textRunXml(''), { alignment: 'left', spacing: { before: 0, after: 0, line: 240 } }), { width: grid[3], widthType: 'dxa', verticalAlign: 'top', marginY: 40 }),
        ].join('')}</w:tr>`;
        return `<w:tbl><w:tblPr><w:tblW w:w="${TEXT_WIDTH_DXA_XML}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${borderXml}</w:tblPr><w:tblGrid>${grid.map((w) => `<w:gridCol w:w="${w}"/>`).join('')}</w:tblGrid>${row1}${row2}</w:tbl>`;
      };
      const cv7991Form1BackPhachBoxXml = () => {
        const boxWidth = TEXT_WIDTH_DXA_XML;
        const mainHeight = 3119; // 5,5 cm
        const cutStripHeight = 567; // 1 cm
        const borderXml = '<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/><w:insideH w:val="nil"/><w:insideV w:val="nil"/></w:tblBorders>';
        const row1 = `<w:tr><w:trPr><w:trHeight w:val="${mainHeight}" w:hRule="exact"/><w:cantSplit/></w:trPr><w:tc><w:tcPr><w:tcW w:w="${boxWidth}" w:type="dxa"/><w:tcBorders><w:top w:val="single" w:sz="6" w:color="000000"/><w:left w:val="single" w:sz="6" w:color="000000"/><w:bottom w:val="single" w:sz="6" w:color="000000"/><w:right w:val="single" w:sz="6" w:color="000000"/><w:tl2br w:val="single" w:sz="6" w:color="000000"/><w:tr2bl w:val="single" w:sz="6" w:color="000000"/></w:tcBorders><w:vAlign w:val="center"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tcMar></w:tcPr><w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p></w:tc></w:tr>`;
        const row2 = `<w:tr><w:trPr><w:trHeight w:val="${cutStripHeight}" w:hRule="exact"/><w:cantSplit/></w:trPr><w:tc><w:tcPr><w:tcW w:w="${boxWidth}" w:type="dxa"/><w:tcBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/></w:tcBorders><w:vAlign w:val="center"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tcMar></w:tcPr><w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p></w:tc></w:tr>`;
        return `<w:tbl><w:tblPr><w:tblW w:w="${boxWidth}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${borderXml}</w:tblPr><w:tblGrid><w:gridCol w:w="${boxWidth}"/></w:tblGrid>${row1}${row2}</w:tbl>`;
      };
      const cv7991Form1BackPhachWithBlockXml = (blockXml) => {
        const startPageTwo = '<w:p><w:pPr><w:pageBreakBefore/><w:keepNext/>' +
          '<w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr>' +
          '<w:r><w:rPr><w:sz w:val="2"/></w:rPr><w:t></w:t></w:r></w:p>';
        return `${startPageTwo}${cv7991Form1BackPhachBoxXml()}${blockXml || ''}`;
      };
      const CV7991_FORM1_PAGE_USABLE_DXA = PAGE_HEIGHT_DXA_XML - PAGE_MARGIN_DXA_XML * 2;
      const CV7991_FORM1_COVER_HEIGHT_DXA = 5550;
      const CV7991_FORM1_BACK_BOX_HEIGHT_DXA = 3686;
      const CV7991_FORM1_BACK_BOX_GAP_DXA = 0;
      const CV7991_FORM1_BOTTOM_SAFETY_DXA = 1400;
      // A4 lề 1,5 cm: diện tích nội dung cao ~15138 twip.
      // Chỉ chừa ~0,9 cm cuối trang để Word xử lý sai số font/baseline.
      // Không giới hạn số câu theo số đếm: câu dài/ngắn chiếm chỗ khác nhau.
      const CV7991_FORM1_FIRST_PAGE_LIMIT_DXA = CV7991_FORM1_PAGE_USABLE_DXA - 520;
      const cv7991EstimatePlainTextCharsXml = (value) => String(value || '')
        .replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (all, relId) => 'x'.repeat(imageTokenCharLengthXml(relId)))
        .replace(/\[\[CV7991_OMML:([^\]]+)\]\]/g, (all, equationId) => 'x'.repeat(equationTokenCharLengthXml(equationId)))
        .replace(/\[\[CV7991_TBL:[^\]]+\]\]/g, '')
        .replace(/<\/?(?:sub|sup)>/gi, '')
        .replace(/\$([^$]+)\$/g, '$1')
        .replace(/\s+/g, ' ')
        .trim();
      const cv7991EstimateInlineMediaHeightDxa = (value) => {
        const source = String(value || '');
        let mediaHeight = 0;
        source.replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (_all, relId) => {
          const image = imageMap && imageMap[String(relId || '').trim()];
          if (!image) return _all;
          const pt = Number(cv7991OriginalImageDisplaySizePtXml(image).heightPt) || 0;
          if (pt > 0) mediaHeight = Math.max(mediaHeight, Math.min(7500, Math.ceil(pt * 20) + 100));
          return _all;
        });
        return mediaHeight;
      };
      const cv7991EstimateTextHeightXml = (value, charsPerLine = 96, baseLine = 240) => {
        const text = cv7991EstimatePlainTextCharsXml(value);
        const lines = Math.max(1, Math.ceil(Math.max(1, text.length) / Math.max(18, charsPerLine)));
        // Một ảnh/công thức nhúng cao có thể buộc Word tăng chiều cao dòng.
        const textHeight = 90 + lines * Math.max(240, baseLine);
        const mediaHeight = cv7991EstimateInlineMediaHeightDxa(value);
        return mediaHeight ? Math.max(textHeight, mediaHeight + 60) : textHeight;
      };
      const cv7991EstimateDataTableHeightXml = (tableData) => {
        const rows = Array.isArray(tableData && tableData.rows) ? tableData.rows : [];
        if (!rows.length) return 360;
        const maxCols = Math.max(1, ...rows.map((row) => (Array.isArray(row) ? row : []).reduce((sum, cell) => sum + Math.max(1, Number(cell && cell.gridSpan) || 1), 0)));
        return rows.reduce((total, row) => {
          const cells = Array.isArray(row) ? row : [];
          let rowHeight = 360;
          cells.forEach((cell) => {
            const span = Math.max(1, Number(cell && cell.gridSpan) || 1);
            const widthChars = Math.max(18, Math.floor(94 * span / maxCols));
            const clean = cv7991EstimatePlainTextCharsXml(cell && cell.text || '');
            const lines = Math.max(1, Math.ceil(Math.max(1, clean.length) / widthChars));
            rowHeight = Math.max(rowHeight, 120 + lines * 240);
          });
          return total + rowHeight;
        }, 0) + 20;
      };
      const cv7991EstimatePromptHeightXml = (parsedQuestion) => {
        const promptLines = String(parsedQuestion && parsedQuestion.prompt || '').split('\n').map((line) => line.trim()).filter(Boolean);
        if (!promptLines.length) return 330;
        let height = 0;
        promptLines.forEach((line) => {
          const segments = String(line || '').split(/(\[\[CV7991_TBL:[^\]]+\]\])/g).filter((part) => part && part.trim());
          if (!segments.length) {
            height += 330;
            return;
          }
          segments.forEach((part) => {
            const tableId = tableTokenOnlyXml(part);
            if (tableId && tableMap && tableMap[tableId]) height += cv7991EstimateDataTableHeightXml(tableMap[tableId]);
            else height += cv7991EstimateTextHeightXml(part, 96, cv7991TextHasInlineFormulaXml(part) ? 300 : 240);
          });
        });
        return Math.max(330, height);
      };
      const cv7991EstimateQuestionHeightXml = (parsedQuestion) => {
        if (!parsedQuestion) return 600;
        let height = cv7991EstimatePromptHeightXml(parsedQuestion);
        const format = String(parsedQuestion.format || 'mc');
        if (format === 'mc') {
          const options = Array.isArray(parsedQuestion.options) ? parsedQuestion.options : [];
          const mode = optionLayoutModeXml(options);
          const optionMedia = options.map((opt) => cv7991EstimateInlineMediaHeightDxa(opt && opt.text)).filter((n) => n > 0);
          if (mode === 'row4') height += Math.max(300, ...optionMedia, 0);
          else if (mode === 'grid2') {
            const h1 = Math.max(300, ...optionMedia.slice(0, 2), 0);
            const h2 = Math.max(300, ...optionMedia.slice(2, 4), 0);
            height += h1 + h2;
          } else height += options.reduce((sum, opt) => sum + Math.max(300, cv7991EstimateInlineMediaHeightDxa(opt && opt.text)), 0) || 1200;
        } else if (format === 'tf') {
          height += 360;
          (Array.isArray(parsedQuestion.statements) ? parsedQuestion.statements : []).forEach((item) => {
            const clean = cv7991StripAnswerHintTokens(String(item && item.text || '').trim());
            const lines = Math.max(1, Math.ceil(Math.max(1, cv7991EstimatePlainTextCharsXml(clean).length) / 82));
            height += 120 + lines * 240;
          });
        } else if (format === 'short') {
          height += 330;
        }
        return Math.max(520, height + 30);
      };
      const cv7991EstimateSectionHeadingHeightXml = () => 420;
      const cv7991Form1CoverParts = (version, codeText) => [
        cv7991Form1TopHeaderXml(version),
        cv7991Form1InfoTopTableXml(version, codeText),
        cv7991Form1CutSpacerTableXml(),
        cv7991Form1InfoBottomTableXml(codeText),
        cv7991Form1ScoreTableXml(),
        paraXml(textRunXml(''), { spacing: { before: 0, after: 0, line: 420, lineRule: 'exact' } }),
      ];
      const cv7991EssayWorkDottedLineXml = () => `<w:p><w:pPr><w:tabs><w:tab w:val="right" w:leader="dot" w:pos="${TEXT_WIDTH_DXA_XML}"/></w:tabs><w:spacing w:before="0" w:after="0" w:line="360" w:lineRule="auto"/><w:ind w:left="0" w:right="0" w:firstLine="0"/></w:pPr><w:r><w:tab/></w:r></w:p>`;
      const appendCv7991EssayWorkAreaXml = (target, version) => {
        if (!wordTemplateDirectMode) return;
        const qs=Array.isArray(version && version.questions)?version.questions:[];
        if (!qs.some((q)=>String(q && q.format || '')==='essay')) return;
        target.push(paraXml(textRunXml('BÀI LÀM PHẦN TỰ LUẬN',{bold:true}),{alignment:'center',spacing:{before:180,after:60,line:240}}));
        for(let i=0;i<wordTemplateEssayLineCount;i+=1) target.push(cv7991EssayWorkDottedLineXml());
      };

      const cv7991UseExamSectionFooters = !(
        (options && options.isReviewOutline)
        || (options && options.suppressAnswerKey)
        || (options && options.mixerExport)
      );
      const cv7991ExamVersions = Array.isArray(versions) ? versions : [];
      const cv7991ExamFooterDefs = cv7991ExamVersions.map((version, index) => ({
        relId: `rIdCv7991Footer${index + 1}`,
        fileName: `footer_cv7991_${index + 1}.xml`,
        code: displayExamCode(version && version.code)
      }));
      const CV7991_BLANK_FOOTER_REL_ID = 'rIdCv7991FooterBlank';
      const CV7991_BLANK_FOOTER_FILE = 'footer_cv7991_blank.xml';

      const cv7991ExamFooterXml = (codeText) => {
        const code = String(codeText || '').trim();
        return `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>`+
          `<w:ftr xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" `+
          `xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">`+
            `<w:p>`+
              `<w:pPr>`+
                `<w:tabs><w:tab w:val="right" w:pos="${TEXT_WIDTH_DXA_XML}"/></w:tabs>`+
                `<w:spacing w:before="0" w:after="0" w:line="220" w:lineRule="auto"/>`+
                `<w:pBdr><w:top w:val="single" w:sz="4" w:space="3" w:color="A6A6A6"/></w:pBdr>`+
              `</w:pPr>`+
              `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>${xmlText(`Mã đề ${code}`)}</w:t></w:r>`+
              `<w:r><w:tab/></w:r>`+
              `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>Trang </w:t></w:r>`+
              `<w:fldSimple w:instr="PAGE"><w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>1</w:t></w:r></w:fldSimple>`+
              `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>/</w:t></w:r>`+
              `<w:fldSimple w:instr="SECTIONPAGES"><w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>1</w:t></w:r></w:fldSimple>`+
            `</w:p>`+
          `</w:ftr>`;
      };
      const cv7991BlankFooterXml = () =>
        `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>`+
        `<w:ftr xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">`+
          `<w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p>`+
        `</w:ftr>`;

      const cv7991ExamSectionBreakXml = (footerRelId) => {
        /* Trang chẵn được xử lý bằng một trang trắng THẬT nằm trong section
           của mã đề. Section break chỉ chuyển sang mã đề kế tiếp. */
        return `<w:p><w:pPr><w:sectPr>`+
          `<w:type w:val="nextPage"/>`+
          `<w:footerReference w:type="default" r:id="${xmlAttr(footerRelId)}"/>`+
          `<w:pgNumType w:start="1"/>`+
          `<w:pgSz w:w="${PAGE_WIDTH_DXA_XML}" w:h="${PAGE_HEIGHT_DXA_XML}"/>`+
          `<w:pgMar w:top="${PAGE_MARGIN_DXA_XML}" w:right="${PAGE_MARGIN_DXA_XML}" `+
            `w:bottom="${PAGE_MARGIN_DXA_XML}" w:left="${PAGE_MARGIN_DXA_XML}" `+
            `w:header="708" w:footer="708" w:gutter="0"/>`+
        `</w:sectPr></w:pPr></w:p>`;
      };

      let cv7991LastExamSectionClosed = false;
      let cv7991FooterlessPaddingSectionOpen = false;

      const cv7991BlankPaddingSectionBreakXml = () =>
        `<w:p><w:pPr><w:sectPr>`+
          `<w:type w:val="nextPage"/>`+
          `<w:footerReference w:type="default" r:id="${CV7991_BLANK_FOOTER_REL_ID}"/>`+
          `<w:pgSz w:w="${PAGE_WIDTH_DXA_XML}" w:h="${PAGE_HEIGHT_DXA_XML}"/>`+
          `<w:pgMar w:top="${PAGE_MARGIN_DXA_XML}" w:right="${PAGE_MARGIN_DXA_XML}" `+
            `w:bottom="${PAGE_MARGIN_DXA_XML}" w:left="${PAGE_MARGIN_DXA_XML}" `+
            `w:header="708" w:footer="708" w:gutter="0"/>`+
        `</w:sectPr></w:pPr></w:p>`;

      const cv7991AppendFooterlessBlankPaddingPageXml = (target, examFooterRelId, closeBlankSection = true) => {
        /* Đóng section của mã đề trước; sau đó tạo 01 section trắng riêng.
           Section trắng dùng footer rỗng nên trang đệm không có mã đề/trang. */
        target.push(cv7991ExamSectionBreakXml(examFooterRelId));
        target.push(
          paraXml(
            textRunXml('\u00A0'),
            { spacing: { before: 0, after: 0, line: 240, lineRule: 'exact' } }
          )
        );
        if (closeBlankSection) target.push(cv7991BlankPaddingSectionBreakXml());
      };

      const parts = [];
      (Array.isArray(versions) ? versions : []).forEach((version, versionIndex) => {
        if (versionIndex > 0 && !cv7991UseExamSectionFooters) parts.push(pageBreakParaXml());
        const codeText = displayExamCode(version && version.code);
        const nameText = String(version && version.studentName || '').trim() || '...............................................................';
        const classText = String(version && version.classLabel || '').trim() || '...............';
        if (wordTemplateBaseMode === 'form1') {
          cv7991Form1CoverParts(version, codeText).forEach((part) => parts.push(part));
        } else if (wordTemplateBaseMode === 'form3') {
          parts.push(cv7991Form3HeaderXml(version, codeText));
        } else {
          parts.push(cv7991ExamHeaderXml(examTitle, nameText, classText, codeText));
          parts.push(paraXml(textRunXml(''), { spacing: { before: 0, after: 0, line: 240 } }));
        }
        let qNo = 1;
        let lastFormat = '';
        let form1BackPhachInserted = false;

        /* Bộ đếm trang dùng riêng cho tùy chọn số trang chẵn.
           Với Form 1 dùng cùng tham số ước lượng đang dùng để quyết định vị trí
           khung cắt phách; Form 2/4 và Form 3/5 dùng chiều cao đầu đề tương ứng. */
        const cv7991EvenPageLimit = CV7991_FORM1_PAGE_USABLE_DXA - CV7991_FORM1_BOTTOM_SAFETY_DXA;
        const cv7991InitialHeaderHeight =
          wordTemplateBaseMode === 'form1' ? CV7991_FORM1_COVER_HEIGHT_DXA
          : (wordTemplateBaseMode === 'form3' ? 1900 : 1350);
        let cv7991EstimatedPageCount = 1;
        let cv7991EstimatedPageUsedHeight = cv7991InitialHeaderHeight;
        let form1UsedHeight = wordTemplateMode === 'form1' ? CV7991_FORM1_COVER_HEIGHT_DXA : 0;


        const versionQuestions = Array.isArray(version && version.questions) ? version.questions : [];
        const sectionNumberMap = cv7991BuildSectionNumberMap(versionQuestions);
        versionQuestions.forEach((question) => {
          const format = String(question && question.format || 'mc');
          const parsed = cv7991ParseQuestionForPrint(question, qNo);
          const isNewSection = format !== lastFormat;
          const blockParts = [];
          if (isNewSection) blockParts.push(sectionHeadingXml(format, sectionNumberMap[format]));
          appendQuestionXml(blockParts, parsed);

          const headingHeight = isNewSection ? cv7991EstimateSectionHeadingHeightXml(format) : 0;
          const questionHeight = cv7991EstimateQuestionHeightXml(parsed);
          const requiredHeight = headingHeight + questionHeight;

          if (options && options.mixerExport) {
          if (wordTemplateMode === 'form1' && !form1BackPhachInserted) {
            // Form 1: không tin tuyệt đối vào chiều cao ước lượng (đặc biệt
            // Equation/MathType). Khung gạch chéo không được chèn sau khi Word
            // đã tự đẩy vài câu lên trang 2.
            const pageLimit = CV7991_FORM1_FIRST_PAGE_LIMIT_DXA;
            const contentForSafety = [
              parsed && parsed.prompt,
              ...(Array.isArray(parsed && parsed.options) ? parsed.options.map((o) => o && o.text) : []),
              ...(Array.isArray(parsed && parsed.statements) ? parsed.statements.map((o) => o && o.text) : []),
            ].map((x) => String(x || '')).join(' ');
            const hasFormula = /\[\[CV7991_OMML:|\$[^$]+\$|<\/?(?:sup|sub)>/i.test(contentForSafety);
            // Ước lượng thật theo từng câu (bao gồm nội dung hình/bảng); chỉ
            // cộng bù 8-12% thay cho nhân 1,3-1,5 và cắt ở câu thứ năm.
            const expandedHeight = Math.ceil(requiredHeight * (hasFormula ? 1.12 : 1.08)) + 80;
            const mustStartPageTwo = form1UsedHeight + expandedHeight > pageLimit;
            if (mustStartPageTwo) {
              /* Trang 2 của Form 1 luôn bắt đầu bằng khung mặt sau phách. */
              parts.push(cv7991Form1BackPhachWithBlockXml(blockParts.join('')));
              form1BackPhachInserted = true;

              cv7991EstimatedPageCount += 1;
              cv7991EstimatedPageUsedHeight =
                CV7991_FORM1_BACK_BOX_HEIGHT_DXA + (2 * 240) + requiredHeight;
            } else {
              blockParts.forEach((part) => parts.push(part));
              form1UsedHeight += expandedHeight;
              cv7991EstimatedPageUsedHeight += requiredHeight;
            }
          } else {
            /* Sau trang 2 của Form 1, hoặc với các form khác, tiếp tục ước lượng
               ngắt trang tự nhiên của Word để biết mã đề đang có bao nhiêu trang. */
            if (
              cv7991EstimatedPageUsedHeight > 0
              && cv7991EstimatedPageUsedHeight + requiredHeight > cv7991EvenPageLimit
            ) {
              cv7991EstimatedPageCount += 1;
              cv7991EstimatedPageUsedHeight = requiredHeight;
            } else {
              cv7991EstimatedPageUsedHeight += requiredHeight;
            }
            blockParts.forEach((part) => parts.push(part));
          }

          } else {
          // Form 1 THỬ NGHIỆM: Word tự dàn toàn bộ câu hỏi, KHÔNG tự chèn
          // pageBreak trước ô cắt phách. Ô cắt phách được ghim ở Header trang 2
          // trong bước đóng gói DOCX, thông qua trường IF { PAGE } = 2.
          // Chiều cao ở đây chỉ dùng cho tùy chọn ước lượng số trang chẵn,
          // không dùng để chọn vị trí ngắt câu hỏi.
          if (
            cv7991EstimatedPageUsedHeight > 0
            && cv7991EstimatedPageUsedHeight + requiredHeight > cv7991EvenPageLimit
          ) {
            cv7991EstimatedPageCount += 1;
            cv7991EstimatedPageUsedHeight = requiredHeight;
          } else {
            cv7991EstimatedPageUsedHeight += requiredHeight;
          }
          blockParts.forEach((part) => parts.push(part));

          }
          if (isNewSection) lastFormat = format;
          qNo += 1;
        });
        /* Khung mặt sau phách là phần bắt buộc của Form 1, kể cả đề ít câu.
           Nếu chưa sang trang 2 thì đặt ngắt trang ngay trước vùng tự luận. */
        const hasEssay = versionQuestions.some((q) => String(q && q.format || '') === 'essay');
        const essayHeight = (wordTemplateDirectMode && hasEssay)
          ? (520 + wordTemplateEssayLineCount * 360)
          : 0;

        if (options && options.mixerExport) {
        if (wordTemplateMode === 'form1' && !form1BackPhachInserted) {
          parts.push(cv7991Form1BackPhachWithBlockXml(''));
          form1BackPhachInserted = true;
          cv7991EstimatedPageCount += 1;
          cv7991EstimatedPageUsedHeight =
            CV7991_FORM1_BACK_BOX_HEIGHT_DXA + (2 * 240);
        }

        }
        // Không sinh khung X trong luồng nội dung: Word tự ngắt trang.
        // Khung trang 2 được lưu trong Header của section mã đề.

        if (essayHeight > 0) {
          if (
            cv7991EstimatedPageUsedHeight > 0
            && cv7991EstimatedPageUsedHeight + essayHeight > cv7991EvenPageLimit
          ) {
            cv7991EstimatedPageCount += 1;
            cv7991EstimatedPageUsedHeight = essayHeight;
          } else {
            cv7991EstimatedPageUsedHeight += essayHeight;
          }
        }

        appendCv7991EssayWorkAreaXml(parts, version);

        const cv7991NeedsFooterlessPadding =
          wordTemplateEvenPagesPerCode
          && cv7991UseExamSectionFooters
          && (cv7991EstimatedPageCount % 2 === 1);

        if (cv7991NeedsFooterlessPadding) {
          const hasNextExam = versionIndex < cv7991ExamVersions.length - 1;
          cv7991AppendFooterlessBlankPaddingPageXml(
            parts,
            cv7991ExamFooterDefs[versionIndex].relId,
            hasNextExam
          );
          if (!hasNextExam) {
            cv7991LastExamSectionClosed = true;
            cv7991FooterlessPaddingSectionOpen = true;
          }
        } else if (cv7991UseExamSectionFooters && versionIndex < cv7991ExamVersions.length - 1) {
          parts.push(cv7991ExamSectionBreakXml(cv7991ExamFooterDefs[versionIndex].relId));
        }
      });
      const sectPrXml = (orientation = 'portrait', includeType = false) => {
        const isLandscape = orientation === 'landscape';
        const width = isLandscape ? LANDSCAPE_PAGE_WIDTH_DXA_XML : PAGE_WIDTH_DXA_XML;
        const height = isLandscape ? LANDSCAPE_PAGE_HEIGHT_DXA_XML : PAGE_HEIGHT_DXA_XML;
        const orientAttr = isLandscape ? ' w:orient="landscape"' : '';
        const typeXml = includeType ? '<w:type w:val="nextPage"/>' : '';
        const footerXml = cv7991UseExamSectionFooters
          ? `<w:footerReference w:type="default" r:id="${CV7991_BLANK_FOOTER_REL_ID}"/>`
          : '';
        return `<w:sectPr>${typeXml}${footerXml}<w:pgSz w:w="${width}" w:h="${height}"${orientAttr}/><w:pgMar w:top="${PAGE_MARGIN_DXA_XML}" w:right="${PAGE_MARGIN_DXA_XML}" w:bottom="${PAGE_MARGIN_DXA_XML}" w:left="${PAGE_MARGIN_DXA_XML}" w:header="708" w:footer="708" w:gutter="0"/></w:sectPr>`;
      };
      const sectionBreakParaXml = (orientation = 'portrait') => `<w:p><w:pPr>${sectPrXml(orientation, true)}</w:pPr></w:p>`;

      const buildCv7991XmlSafeBlob = async (bodyParts, orientation = 'portrait') => {
        const sectPr = sectPrXml(orientation, false);
        const documentXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:document xmlns:wpc="http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" xmlns:w15="http://schemas.microsoft.com/office/word/2012/wordml" xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup" xmlns:wpi="http://schemas.microsoft.com/office/word/2010/wordprocessingInk" xmlns:wne="http://schemas.microsoft.com/office/word/2006/wordml" xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:pic="http://schemas.openxmlformats.org/drawingml/2006/picture"><w:body>${(Array.isArray(bodyParts) ? bodyParts : []).join('')}${sectPr}</w:body></w:document>`;
        const contentTypesXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">${Array.from(defaultExts).map((ext) => `<Default Extension="${xmlAttr(ext)}" ContentType="${xmlAttr(contentTypeForExt(ext))}"/>`).join('')}<Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/></Types>`;
        const relsXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/></Relationships>`;
        const docRelsXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">${rels.join('')}</Relationships>`;
        // Kiểm tra XML trước khi đóng gói. Nếu có ký tự/cấu trúc làm XML hỏng,
        // dừng ngay và hiện lỗi thay vì tải xuống một file Word không mở được.
        if (typeof DOMParser !== 'undefined') {
          const validateXmlPart = (xmlText, label) => {
            const parsed = new DOMParser().parseFromString(String(xmlText || ''), 'application/xml');
            const errorNode = parsed.querySelector('parsererror');
            if (errorNode) throw new Error(`Không thể tạo file Word: XML ${label} không hợp lệ.`);
          };
          validateXmlPart(documentXml, 'document.xml');
          validateXmlPart(contentTypesXml, '[Content_Types].xml');
          validateXmlPart(relsXml, '_rels/.rels');
          validateXmlPart(docRelsXml, 'word/_rels/document.xml.rels');
        }
        const zip = new window.JSZip();
        zip.file('[Content_Types].xml', contentTypesXml);
        zip.folder('_rels').file('.rels', relsXml);
        zip.folder('word').file('document.xml', documentXml);
        zip.folder('word').folder('_rels').file('document.xml.rels', docRelsXml);
        mediaFiles.forEach((file) => zip.folder('word').folder('media').file(file.name, file.data));
        embeddingFiles.forEach((file) => zip.folder('word').folder('embeddings').file(file.name, file.data));
        return await zip.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      };
      const exportCv7991XmlSafeDocx = async (bodyParts, outputName, orientation = 'portrait') => {
        const blob = await buildCv7991XmlSafeBlob(bodyParts, orientation);
        downloadCv7991File(outputName, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
      };
      const cv7991ReviewOutlineSectionLabelXml = (format) => {
        if (format === 'tf') return 'II. Trắc nghiệm đúng - sai';
        if (format === 'short') return 'III. Trả lời ngắn';
        if (format === 'essay') return 'IV. Tự luận';
        return 'I. Trắc nghiệm nhiều lựa chọn';
      };
      const cv7991ReviewQuestionsForRequestXml = (questions, request) => (Array.isArray(questions) ? questions : []).filter((question) => {
        return String(question && question.format || '') === String(request && request.format || '')
          && String(question && question.level || '') === String(request && request.level || '')
          && cv7991UnitKey(question && question.unit) === String(request && request.unitKey || cv7991UnitKey(request && request.item && request.item.unit));
      });
      const appendCv7991BankAnswerXml = (target, answerText) => {
        const raw = String(answerText || '').replace(/\r/g, '').trim();
        if (!raw) return;
        let normalized = /^\s*(Đáp án|Hướng dẫn chấm|Đáp án và thang điểm)\s*:/i.test(raw) ? raw : `Đáp án: ${raw}`;
        normalized = normalized.replace(/^\s*Hướng dẫn chấm\s*:/i, 'Đáp án và thang điểm:');
        normalized.split('\n').map((line) => line.trim()).filter(Boolean).forEach((line) => {
          const tableId = tableTokenOnlyXml(line);
          if (tableId && tableMap && tableMap[tableId]) {
            target.push(dataTableXml(tableMap[tableId]));
            return;
          }
          target.push(simpleParaTextXml(line, /^\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]$/.test(line)
            ? { alignment: 'center', spacing: { before: 60, after: 60, line: 240 } }
            : { spacing: { before: 40, after: 0, line: 240 } }));
        });
      };

      const appendCv7991BankGuideXml = (target, question) => {
        const guide = cv7991QuestionGuideForExport(question);
        if (!guide) return;
        let wroteLabel = false;
        const pushLabelOnly = () => {
          if (wroteLabel) return;
          target.push(paraXml(textRunXml('Hướng dẫn giải:', { bold: true, italics: true, color: '1F4E79' }), { spacing: { before: 40, after: 0, line: 240 } }));
          wroteLabel = true;
        };
        guide.split('\n').map((line) => String(line || '').trim()).filter(Boolean).forEach((line) => {
          const segments = String(line || '').split(/(\[\[CV7991_TBL:[^\]]+\]\])/g).filter((part) => part && part.trim());
          if (!segments.length) return;
          segments.forEach((part) => {
            const tableId = tableTokenOnlyXml(part);
            if (tableId && tableMap && tableMap[tableId]) {
              pushLabelOnly();
              target.push(dataTableXml(tableMap[tableId]));
              return;
            }
            const cleanText = String(part || '').trim();
            if (!cleanText) return;
            const prefixXml = wroteLabel ? '' : textRunXml('Hướng dẫn giải: ', { bold: true, italics: true, color: '1F4E79' });
            const spacing = cv7991TextHasInlineFormulaXml(cleanText)
              ? cv7991InlineFormulaSpacingXml(cleanText, { before: 40, after: 0, line: 240 })
              : { before: 40, after: 0, line: 240 };
            target.push(paraXml(prefixXml + runsWithImagesXml(cleanText, { middleLineImage: true }), { spacing }));
            wroteLabel = true;
          });
        });
      };

      const cv7991QuestionCompetencyTextXml = (question) => String(
        question && question.competency
        || cv7991CompetencyFromLine(question && question.answer)
        || cv7991CompetencyFromLine(question && question.text)
        || ''
      ).replace(/^\s*Năng\s*lực\s*:\s*/i, '').replace(/\s+/g, ' ').trim();
      const appendCv7991QuestionCompetencyXml = (target, question) => {
        const competency = cv7991QuestionCompetencyTextXml(question);
        if (!competency) return;
        // Đã bỏ dòng Năng lực theo yêu cầu.
      };
      const appendCv7991ReviewBankSpecXml = (target, reviewRequests, reviewQuestions) => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        if (!selected.length) return;
        const levelsForSpec = ['b', 'h', 'v', 'vdc'];
        const levelHeaders = { b: 'Nhận biết', h: 'Thông hiểu', v: 'Vận dụng', vdc: 'Vận dụng cao' };
        const byUnit = new Map();
        selected.forEach((request) => {
          const item = request.item || {};
          const key = String(request.unitKey || item.unitKey || cv7991UnitKey(item.unit)).trim() || `unit-${byUnit.size + 1}`;
          if (!byUnit.has(key)) byUnit.set(key, { item, requests: [] });
          byUnit.get(key).requests.push(request);
        });
        const rows = [];
        const cellOpts = (extra = {}) => Object.assign({
          size: 15,
          line: 180,
          lineRule: 'exact',
          marginY: 22,
          marginX: 36,
          widthType: 'dxa',
          verticalAlign: 'center',
          align: 'center',
        }, extra || {});
        const specCell = (text, extra = {}) => cellTextXml(text, cellOpts(extra));
        rows.push([
          specCell('TT', { bold: true }),
          specCell('Chủ đề/Chương', { bold: true }),
          specCell('Nội dung/Đơn vị kiến thức', { bold: true }),
          ...levelsForSpec.map((level) => specCell(levelHeaders[level], { bold: true })),
        ]);
        let rowIndex = 1;
        byUnit.forEach((group) => {
          const item = group.item || {};
          const reqByLevel = Object.create(null);
          group.requests.forEach((request) => {
            const level = levelsForSpec.includes(request.level) ? request.level : 'b';
            const reqText = String(item.requirements && item.requirements[level] || cv7991InferRequirement(item.unit || '', level) || '').trim();
            if (!reqText) return;
            if (!reqByLevel[level]) reqByLevel[level] = [];
            if (!reqByLevel[level].includes(reqText)) reqByLevel[level].push(reqText);
          });
          rows.push([
            specCell(String(rowIndex)),
            specCell(item.chapter || '', { align: 'left' }),
            specCell(item.unit || '', { align: 'left' }),
            ...levelsForSpec.map((level) => specCell((reqByLevel[level] || []).join('\n'), { align: 'left' })),
          ]);
          rowIndex += 1;
        });
        target.push(paraXml(textRunXml('Bản đặc tả yêu cầu cần đạt', { bold: true }), { spacing: { before: 120, after: 60, line: 240 } }));
        const gridWidths = [450, 1500, 1850, 1600, 1600, 1600, 1600];
        target.push(tableXml(rows, { fixed: true, widthDxa: TEXT_WIDTH_DXA_XML, gridWidths }));
      };

      if (options && options.isReviewOutline) {
        const reviewVersion = (Array.isArray(versions) ? versions : []).find((version) => version && Array.isArray(version.questions)) || { questions: [] };
        const reviewQuestions = Array.isArray(reviewVersion.questions) ? reviewVersion.questions : [];
        const reviewRequests = (Array.isArray(options.reviewRequests) && options.reviewRequests.length)
          ? options.reviewRequests
          : collectCv7991MatrixRequests();
        const filenameBase = cv7991SafeDocxFileNameLocal(`mon ${cv7991ReviewSubjectLabel()}` || examTitle || 'de_cuong_on_tap_CV7991', 'de_cuong_on_tap_CV7991').replace(/\s+/g, '_');

        const outlineParts = [
          paraXml(textRunXml(cv7991ReviewOutlineDocTitle(), { bold: true, size: 30 }), { alignment: 'center', spacing: { before: 0, after: 0, line: 260 } }),
          paraXml(textRunXml(cv7991ReviewOutlineDocSubtitle(), { italics: true, size: 24 }), { alignment: 'center', spacing: { before: 0, after: 100, line: 240 } }),
        ];
        let outlineQuestionNo = 1;
        CV7991_FORMATS.forEach((format) => {
          const sectionQuestions = reviewQuestions.filter((question) => String(question && question.format || 'mc') === format);
          if (!sectionQuestions.length) return;
          outlineParts.push(paraXml(textRunXml(cv7991ReviewOutlineSectionLabelXml(format), { bold: true }), { spacing: { before: 220, after: 0, line: 240 } }));
          sectionQuestions.forEach((question) => {
            appendQuestionXml(outlineParts, cv7991ParseQuestionForPrint(question, outlineQuestionNo));
            outlineQuestionNo += 1;
          });
        });
        const outlineFileName = `de_cuong_on_tap_${filenameBase}.docx`;
        const outlineBlob = await buildCv7991XmlSafeBlob(outlineParts, 'portrait');

        const previousPreserveSourceAnswerColorsXml = cv7991PreserveSourceAnswerColorsXml;
        cv7991PreserveSourceAnswerColorsXml = true;
        const bankParts = [
          paraXml(textRunXml(cv7991ReviewBankDocTitle(), { bold: true, size: 28 }), { alignment: 'center', spacing: { before: 0, after: 0, line: 260 } }),
          paraXml(textRunXml(cv7991ReviewBankDocSubtitle(), { italics: true, size: 24 }), { alignment: 'center', spacing: { before: 0, after: 100, line: 240 } }),
        ];
        const selectedRequests = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        // Đã bỏ Bản đặc tả trong file Ngân hàng câu hỏi ôn tập theo yêu cầu.
        const byUnit = new Map();
        selectedRequests.forEach((request) => {
          const key = String(request.unitKey || cv7991UnitKey(request.item && request.item.unit));
          if (!byUnit.has(key)) byUnit.set(key, { item: request.item || {}, requests: [] });
          byUnit.get(key).requests.push(request);
        });
        let unitIndex = 1;
        byUnit.forEach((group) => {
          const item = group.item || {};
          const title = [item.chapter, item.unit].filter(Boolean).join(' - ');
          bankParts.push(paraXml(textRunXml(`${unitIndex}. ${title || 'Nội dung ôn tập'}`, { bold: true }), { spacing: { before: 220, after: 0, line: 240 } }));
          let questionNumber = 1;
          // Mẫu ngân hàng mới của MVIP:
          // I/II/III/IV theo loại câu; mức độ nằm ngay sau số câu: Câu 1 (NB), Câu 2 (TH)...
          CV7991_FORMATS.forEach((format) => {
            const formatRequests = group.requests.filter((request) => String(request && request.format || 'mc') === format);
            if (!formatRequests.length) return;

            const sectionEntries = [];
            CV7991_LEVELS.forEach((level) => {
              const request = formatRequests.find((entry) => entry.level === level);
              if (!request) return;
              const questionsForRequest = cv7991ReviewQuestionsForRequestXml(reviewQuestions, request);
              questionsForRequest.forEach((question) => sectionEntries.push({ question, level }));
            });
            if (!sectionEntries.length) return;

            bankParts.push(paraXml(
              textRunXml(cv7991ReviewOutlineSectionLabelXml(format), { bold: true }),
              { spacing: { before: 160, after: 0, line: 240 } }
            ));

            sectionEntries.forEach(({ question, level }) => {
              appendQuestionXml(bankParts, cv7991ParseQuestionForPrint(question, `${questionNumber} (${cv7991LevelCode(level)})`));
              appendCv7991BankAnswerXml(bankParts, question.answer);
              appendCv7991BankGuideXml(bankParts, question);
              appendCv7991QuestionCompetencyXml(bankParts, question);
              questionNumber += 1;
            });
          });
          unitIndex += 1;
        });
        const bankFileName = `ngan_hang_cau_hoi_on_tap_${filenameBase}.docx`;
        const bankBlob = await buildCv7991XmlSafeBlob(bankParts, 'portrait');
        cv7991PreserveSourceAnswerColorsXml = previousPreserveSourceAnswerColorsXml;
        const packageZip = new window.JSZip();
        // Đặt cả 2 file Word vào cùng một thư mục trước khi nén để khi giải nén không bị lộn xộn.
        const packageFolderName = `bo_de_cuong_on_tap_${filenameBase}`;
        const packageFolder = packageZip.folder(packageFolderName);
        packageFolder.file(outlineFileName, outlineBlob);
        packageFolder.file(bankFileName, bankBlob);
        const packageBlob = await packageZip.generateAsync({ type: 'blob', mimeType: 'application/zip' });
        downloadCv7991File(`${packageFolderName}.zip`, packageBlob, 'application/zip');
        return;
      }

      const cv7991CloseExamAreaBeforeFollowingContent = () => {
        if (!cv7991UseExamSectionFooters || !cv7991ExamFooterDefs.length) {
          parts.push(sectionBreakParaXml('portrait'));
          return;
        }
        if (cv7991FooterlessPaddingSectionOpen) {
          parts.push(cv7991BlankPaddingSectionBreakXml());
          cv7991FooterlessPaddingSectionOpen = false;
          cv7991LastExamSectionClosed = true;
          return;
        }
        parts.push(cv7991ExamSectionBreakXml(
          cv7991ExamFooterDefs[cv7991ExamFooterDefs.length - 1].relId
        ));
        cv7991LastExamSectionClosed = true;
      };

      if (options && options.suppressAnswerKey) {
        const blob = await buildCv7991XmlSafeBlob(parts, 'portrait');
        const outputName = `${cv7991SafeDocxFileNameLocal(examTitle, 'de_tron_MVIP')}.docx`;
        downloadCv7991File(outputName, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
        return;
      }

      const groupedAnswerLayout = cv7991UseGroupedAnswerLayoutXml(Array.isArray(versions) ? versions : []);
      const hasMatrixSpec = false;
      let finalOrientation = 'portrait';
      if (options && options.mixerExport) {
        // Trộn đề: ngắt trang thường thay vì tạo section mới. Toàn bộ đáp án
        // là paragraph thuần để file mở ổn định trên Microsoft Word desktop.
        parts.push(pageBreakParaXml());
        parts.push(paraXml(
          textRunXml(cv7991AnswerTitleXml(Array.isArray(versions) ? versions : []), { bold: true, size: 24 }),
          { alignment: 'center', spacing: { before: 0, after: 80, line: 240 } }
        ));
        appendMixerAnswerKeyXml(parts, Array.isArray(versions) ? versions : []);
        finalOrientation = 'portrait';
      } else if (groupedAnswerLayout) {
        const groupedVersions = cv7991AnswerVersionsForOutputXml(Array.isArray(versions) ? versions : []);
        const hasGroupedScanAnswer = groupedVersions.some((version) => {
          const questions = Array.isArray(version && version.questions) ? version.questions : [];
          return questions.some((question) => question && ['mc', 'tf', 'short'].includes(String(question.format || 'mc')));
        });
        const hasGroupedEssayAnswer = groupedVersions.some((version) => cv7991AnswerEntriesByFormat(version && version.questions, 'essay').length);
        const hasGroupedAnswer = hasGroupedScanAnswer || hasGroupedEssayAnswer;
        if (hasGroupedAnswer) {
          // Lựa chọn 2/3: phần đề bài giữ A4 dọc.
          // Đúng mẫu mong muốn:
          //   MA TRẬN + tên đề + môn/lớp
          //   [bảng ma trận]
          //   ĐÁP ÁN + tên đề + môn/lớp
          //   A. TRẮC NGHIỆM
          // Ma trận + A. TRẮC NGHIỆM dùng A4 ngang.
          // B. TỰ LUẬN quay lại A4 dọc.
          cv7991CloseExamAreaBeforeFollowingContent();

          const hasGroupedMatrix = appendSelectedExamMatrixXml(
            parts,
            options.reviewRequests || [],
            Array.isArray(versions) ? versions : []
          );
          if (hasGroupedMatrix) finalOrientation = 'landscape';

          // Tiêu đề đáp án đặt SAU bảng ma trận, đúng như mẫu ảnh.
          parts.push(paraXml(
            textRunXml(cv7991AnswerTitleXml(Array.isArray(versions) ? versions : []), { bold: true, size: 24 }),
            {
              alignment: 'center',
              spacing: { before: hasGroupedMatrix ? 120 : 0, after: 80, line: 240 }
            }
          ));

          if (hasGroupedScanAnswer) {
            appendGroupedAnswerKeyXml(parts, Array.isArray(versions) ? versions : [], 'scan');
            finalOrientation = 'landscape';
          }
          if (hasGroupedEssayAnswer) {
            if (hasGroupedScanAnswer || hasGroupedMatrix) {
              parts.push(sectionBreakParaXml('landscape'));
            }
            appendGroupedAnswerKeyXml(parts, Array.isArray(versions) ? versions : [], 'essay');
            finalOrientation = 'portrait';
          }
        }
      } else {
        // Lựa chọn 1 cũng xuất ma trận giống Lựa chọn 2/3:
        //   MA TRẬN + Tên đề + Môn/Lớp
        //   [bảng ma trận]
        //   ĐÁP ÁN + Tên đề + Môn/Lớp
        //   A. TRẮC NGHIỆM / B. TỰ LUẬN...
        cv7991CloseExamAreaBeforeFollowingContent();

        const hasSingleMatrix = appendSelectedExamMatrixXml(
          parts,
          options.reviewRequests || [],
          Array.isArray(versions) ? versions : []
        );
        if (hasSingleMatrix) finalOrientation = 'landscape';

        parts.push(paraXml(
          textRunXml(cv7991AnswerTitleXml(Array.isArray(versions) ? versions : []), { bold: true, size: 24 }),
          {
            alignment: 'center',
            spacing: { before: hasSingleMatrix ? 120 : 0, after: 80, line: 240 }
          }
        ));

        appendAnswerKeyXml(parts, Array.isArray(versions) ? versions : []);
      }
      if (hasMatrixSpec) {
        if (groupedAnswerLayout) {
          // Nếu sau đáp án còn ma trận/bản đặc tả thì kết thúc phần đáp án hiện tại,
          // rồi quay lại A4 dọc cho phần tiếp theo.
          parts.push(sectionBreakParaXml(finalOrientation));
          finalOrientation = 'portrait';
        } else {
          // Lựa chọn 1: phần đề bài/đáp án trước đó giữ A4 dọc;
          // riêng phần 1. MA TRẬN và 2. BẢN ĐẶC TẢ chuyển sang A4 ngang.
          parts.push(sectionBreakParaXml('portrait'));
          finalOrientation = 'landscape';
        }
        appendMatrixSpecXml(parts, options.reviewRequests || [], Array.isArray(versions) ? versions : [], 'MA TRẬN VÀ BẢNG ĐẶC TẢ');
      }
      const cv7991LastFooterDef = cv7991ExamFooterDefs.length
        ? cv7991ExamFooterDefs[cv7991ExamFooterDefs.length - 1]
        : null;
      const sectPr = (cv7991UseExamSectionFooters && !cv7991LastExamSectionClosed && cv7991LastFooterDef)
        ? `<w:sectPr><w:footerReference w:type="default" r:id="${xmlAttr(cv7991LastFooterDef.relId)}"/><w:pgNumType w:start="1"/><w:pgSz w:w="${finalOrientation === 'landscape' ? LANDSCAPE_PAGE_WIDTH_DXA_XML : PAGE_WIDTH_DXA_XML}" w:h="${finalOrientation === 'landscape' ? LANDSCAPE_PAGE_HEIGHT_DXA_XML : PAGE_HEIGHT_DXA_XML}"${finalOrientation === 'landscape' ? ' w:orient="landscape"' : ''}/><w:pgMar w:top="${PAGE_MARGIN_DXA_XML}" w:right="${PAGE_MARGIN_DXA_XML}" w:bottom="${PAGE_MARGIN_DXA_XML}" w:left="${PAGE_MARGIN_DXA_XML}" w:header="708" w:footer="708" w:gutter="0"/></w:sectPr>`
        : sectPrXml(finalOrientation, false);
      const documentXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:document xmlns:wpc="http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" xmlns:w15="http://schemas.microsoft.com/office/word/2012/wordml" xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup" xmlns:wpi="http://schemas.microsoft.com/office/word/2010/wordprocessingInk" xmlns:wne="http://schemas.microsoft.com/office/word/2006/wordml" xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:pic="http://schemas.openxmlformats.org/drawingml/2006/picture"><w:body>${parts.join('')}${sectPr}</w:body></w:document>`;
      const cv7991FooterOverrides = cv7991UseExamSectionFooters
        ? cv7991ExamFooterDefs.map((item) => `<Override PartName="/word/${xmlAttr(item.fileName)}" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml"/>`).join('')
          + `<Override PartName="/word/${CV7991_BLANK_FOOTER_FILE}" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml"/>`
        : '';
      const contentTypesXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">${Array.from(defaultExts).map((ext) => `<Default Extension="${xmlAttr(ext)}" ContentType="${xmlAttr(contentTypeForExt(ext))}"/>`).join('')}<Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/>${cv7991FooterOverrides}</Types>`;
      const relsXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/></Relationships>`;
      const cv7991FooterRelationships = cv7991UseExamSectionFooters
        ? cv7991ExamFooterDefs.map((item) => `<Relationship Id="${xmlAttr(item.relId)}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer" Target="${xmlAttr(item.fileName)}"/>`).join('')
          + `<Relationship Id="${CV7991_BLANK_FOOTER_REL_ID}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer" Target="${CV7991_BLANK_FOOTER_FILE}"/>`
        : '';
      const docRelsXml = `<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">${rels.join('')}${cv7991FooterRelationships}</Relationships>`;
      const zip = new window.JSZip();
      zip.file('[Content_Types].xml', contentTypesXml);
      zip.folder('_rels').file('.rels', relsXml);
      zip.folder('word').file('document.xml', documentXml);
      zip.folder('word').folder('_rels').file('document.xml.rels', docRelsXml);
      if (cv7991UseExamSectionFooters) {
        cv7991ExamFooterDefs.forEach((item) => {
          zip.folder('word').file(item.fileName, cv7991ExamFooterXml(item.code));
        });
        zip.folder('word').file(CV7991_BLANK_FOOTER_FILE, cv7991BlankFooterXml());
      }
      mediaFiles.forEach((file) => zip.folder('word').folder('media').file(file.name, file.data));
      embeddingFiles.forEach((file) => zip.folder('word').folder('embeddings').file(file.name, file.data));

      // THỬ NGHIỆM: Form 1 ghim khung mặt sau phách vào riêng trang 2.
      // Lưu ý: điều kiện IF/PAGE + ảnh nổi cần được kiểm tra với Microsoft Word
      // (LibreOffice có thể không đánh giá trường IF trong Header đúng như Word).
      const cv7991Form1ConditionalPage2HeaderPatch = async (sourceBlob) => {
        const zipIn = await window.JSZip.loadAsync(sourceBlob);
        const xmlName = 'word/document.xml';
        const relName = 'word/_rels/document.xml.rels';
        const ctName = '[Content_Types].xml';
        let bodyXml = await zipIn.file(xmlName).async('string');
        let docRelXml = await zipIn.file(relName).async('string');
        let typesXml = await zipIn.file(ctName).async('string');
        const headerRel = 'rIdMVIPForm1Page2Header';
        const firstRel = 'rIdMVIPForm1FirstHeader';
        const blankRel = 'rIdMVIPForm1BlankHeader';
        let examSectionCount = 0;
        bodyXml = bodyXml.replace(/<w:sectPr\b[^>]*>[\s\S]*?<\/w:sectPr>/g, (sect) => {
          const m = sect.match(/<w:footerReference\s+w:type="default"\s+r:id="(rIdCv7991Footer\d+)"\s*\/>/);
          if (m) {
            examSectionCount += 1;
            const headerRefs = `<w:headerReference w:type="even" r:id="${headerRel}"/>` +
              `<w:headerReference w:type="default" r:id="${blankRel}"/>` +
              `<w:headerReference w:type="first" r:id="${firstRel}"/>` +
              `<w:footerReference w:type="first" r:id="${m[1]}"/>` +
              `<w:footerReference w:type="even" r:id="${m[1]}"/>`;
            const withRefs = sect.replace(/<w:sectPr([^>]*)>/, `<w:sectPr$1>${headerRefs}`);
            // Chỉ trong Form 1 Soạn đề: đặt toàn bộ phần đầu đề sát lề trên
            // giống Trộn đề (top 720 twip, vị trí header 360 twip).
            // Không sửa section ma trận/đáp án hoặc các form khác.
            const withMixerTop = withRefs.replace(/<w:pgMar\b[^>]*\/>/, (pgMar) =>
              pgMar.replace(/w:top="\d+"/, 'w:top="720"').replace(/w:header="\d+"/, 'w:header="360"'));
            return withMixerTop.replace('<w:pgSz ', '<w:titlePg/><w:pgSz ');
          }
          // Đặt Header trống trên các section ma trận/đáp án sau phần đề,
          // không để Header của đề kế thừa sang phần này.
          const existingFooter = sect.match(/<w:footerReference\s+w:type="default"\s+r:id="([^"]+)"\s*\/>/);
          const evenFooter = existingFooter ? `<w:footerReference w:type="even" r:id="${existingFooter[1]}"/>` : '';
          return sect.replace(/<w:sectPr([^>]*)>/,
            `<w:sectPr$1><w:headerReference w:type="even" r:id="${blankRel}"/>` +
            `<w:headerReference w:type="default" r:id="${blankRel}"/>` + evenFooter);
        });
        if (!examSectionCount) throw new Error('Không tìm thấy section đề thi để ghim khung Form 1.');
        const headerBase64 = '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        const firstBase64 = 'PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiIHN0YW5kYWxvbmU9InllcyI/Pjx3OmhkciB4bWxuczp3PSJodHRwOi8vc2NoZW1hcy5vcGVueG1sZm9ybWF0cy5vcmcvd29yZHByb2Nlc3NpbmdtbC8yMDA2L21haW4iPjx3OnAvPjwvdzpoZHI+';
        const pictureBase64 = 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        const asBytes = (str) => Uint8Array.from(atob(str), (c) => c.charCodeAt(0));
        zipIn.file(xmlName, bodyXml);
        const headerType = 'application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml';
        typesXml = typesXml.replace('</Types>',
          `<Override PartName="/word/header_mvip_box.xml" ContentType="${headerType}"/>` +
          `<Override PartName="/word/header_mvip_first.xml" ContentType="${headerType}"/>` +
          `<Override PartName="/word/header_mvip_blank.xml" ContentType="${headerType}"/>` +
          (typesXml.includes('Extension="png"') ? '' : '<Default Extension="png" ContentType="image/png"/>') +
          '</Types>');
        docRelXml = docRelXml.replace('</Relationships>',
          `<Relationship Id="${headerRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_box.xml"/>` +
          `<Relationship Id="${firstRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_first.xml"/>` +
          `<Relationship Id="${blankRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_blank.xml"/>` +
          '</Relationships>');
        zipIn.file(relName, docRelXml);
        zipIn.file(ctName, typesXml);
        zipIn.file('word/header_mvip_box.xml', asBytes(headerBase64));
        zipIn.file('word/header_mvip_first.xml', asBytes(firstBase64));
        zipIn.file('word/header_mvip_blank.xml', asBytes(firstBase64));
        zipIn.file('word/media/_form1_conditional_box.png', asBytes(pictureBase64));
        zipIn.file('word/_rels/header_mvip_box.xml.rels',
          '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' +
          '<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">' +
          '<Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/_form1_conditional_box.png"/>' +
          '</Relationships>');
        // Yêu cầu Word cập nhật PAGE/IF lần đầu mở tài liệu.
        const settingFile = zipIn.file('word/settings.xml');
        if (settingFile) {
          let cfg = await settingFile.async('string');
          if (!cfg.includes('<w:updateFields')) {
            cfg = cfg.replace('</w:settings>', '<w:updateFields w:val="true"/></w:settings>');
          }
          if (!cfg.includes('<w:evenAndOddHeaders')) {
            cfg = cfg.replace('</w:settings>', '<w:evenAndOddHeaders w:val="true"/></w:settings>');
          }
          zipIn.file('word/settings.xml', cfg);
        } else {
          zipIn.file('word/settings.xml', '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' +
            '<w:settings xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">' +
            '<w:evenAndOddHeaders w:val="true"/><w:updateFields w:val="true"/></w:settings>');
          typesXml = typesXml.replace('</Types>',
            '<Override PartName="/word/settings.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.settings+xml"/></Types>');
          docRelXml = docRelXml.replace('</Relationships>',
            '<Relationship Id="rIdMVIPForm1Settings" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings" Target="settings.xml"/></Relationships>');
          zipIn.file(ctName, typesXml);
          zipIn.file(relName, docRelXml);
        }
        return await zipIn.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      };

      const blob = await zip.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      const finalBlob = (wordTemplateMode === 'form1' && !(options && options.mixerExport))
        ? await cv7991Form1ConditionalPage2HeaderPatch(blob)
        : blob;
      const outputName = `${cv7991SafeDocxFileNameLocal(examTitle, 'de_kiem_tra_CV7991')}.docx`;
      downloadCv7991File(outputName, finalBlob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
    }

    async function exportCv7991GeneratedWord(versions, options = {}) {
      const sharedImageMap = (options && options.imageMap)
        || (state.cv7991Bank && state.cv7991Bank.images) || {};
      const sharedTableMap = (options && options.tableMap)
        || (state.cv7991Bank && state.cv7991Bank.tables) || {};
      const selectedQuestions = (Array.isArray(versions) ? versions : [])
        .flatMap((version) => Array.isArray(version && version.questions) ? version.questions : []);
      if (typeof cv7991PreparePresenterImages === 'function') {
        try {
          /* Cùng bước chuẩn bị của Trình chiếu Word/PDF/Excel thông thường:
             nhận MTEF, dựng MathJax, cắt sát nét và ghi số đo baseline. */
          await cv7991PreparePresenterImages(sharedImageMap, selectedQuestions, sharedTableMap);
        } catch (error) {
          console.warn('Không chuẩn bị được toàn bộ công thức trước khi xuất Word:', error);
        }
      }
      if (typeof cv7991PrepareWordExportMathTypeAssets === 'function') {
        try {
          /* Đo lại đúng SVG MathJax cuối cùng ở hệ em độc lập với hộp OLE.
             Ảnh PNG, kích thước và baseline này là nguồn duy nhất của DOCX. */
          await cv7991PrepareWordExportMathTypeAssets(
            sharedImageMap,
            selectedQuestions,
            sharedTableMap
          );
        } catch (error) {
          console.warn('Không đo được toàn bộ vùng nét MathJax trước khi xuất Word:', error);
        }
      }
      options = Object.assign({}, options || {}, {
        imageMap: sharedImageMap,
        tableMap: sharedTableMap,
      });
      if (window.JSZip) {
        await exportCv7991GeneratedWordXmlSafe(versions, options || {});
        return;
      }
      if (!window.docx) throw new Error('Chưa tải được thư viện xuất Word.');
      const d = window.docx;
      const font = 'Times New Roman';
      const TWIP_CM_LOCAL = Math.round(1.5 * 567);
      const paraSpacing = { before: 90, after: 0, line: 240 };
      const imageMap = (options && options.imageMap) || (state.cv7991Bank && state.cv7991Bank.images) || {};
      const tableMap = (options && options.tableMap) || (state.cv7991Bank && state.cv7991Bank.tables) || {};
      const equationMap = (options && options.equationMap) || (state.cv7991Bank && state.cv7991Bank.equations) || {};
      const IMG_TOKEN_RE = /\[\[CV7991_IMG:([^\]]+)\]\]/g;
      const TBL_TOKEN_RE = /\[\[CV7991_TBL:([^\]]+)\]\]/g;
      const OMML_TOKEN_RE = /\[\[CV7991_OMML:([^\]]+)\]\]/g;
      const INLINE_TOKEN_RE = /\[\[CV7991_(IMG|OMML):([^\]]+)\]\]/g;
      const cv7991UnsupportedImageRelIds = new Set();
      const cv7991UnsupportedEquationIds = new Set();
      const cv7991UnsupportedEquationSizes = new Map();
      const cv7991StandaloneEquationSize = 28;
      const cv7991InlineEquationSize = 30;
      const cv7991TextHasFormulaToken = (text) => /\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]/.test(String(text || ''));
      const cv7991TextIsStandaloneFormula = (text) => {
        const source = String(text || '');
        if (!cv7991TextHasFormulaToken(source)) return false;
        const outside = source
          .replace(/\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]/g, ' ')
          .replace(/\[\[CV7991_TBL:[^\]]+\]\]/g, ' ')
          .replace(/<\/?(?:sub|sup)>/gi, '')
          .replace(/\$[^$]*\$/g, ' ')
          .replace(/[\s0-9.,;:!?()[\]{}+\-−=×÷*\/<>≤≥|]+/g, '')
          .trim();
        return outside.length === 0;
      };
      const cv7991TextHasInlineFormula = (text) => cv7991TextHasFormulaToken(text) && !cv7991TextIsStandaloneFormula(text);
      const cv7991EquationSizingExtra = (text, extra = {}) => {
        const raw = String(text || '');
        const base = Object.assign({}, extra || {});
        const explicit = Number(base.equationSize);
        if (cv7991TextIsStandaloneFormula(raw)) {
          return Object.assign(base, { standaloneEquation: true, equationSize: cv7991StandaloneEquationSize });
        }
        if (cv7991TextHasInlineFormula(raw) && !(Number.isFinite(explicit) && explicit > 0)) {
          return Object.assign(base, { equationSize: cv7991InlineEquationSize });
        }
        return base;
      };
      const cv7991InlineFormulaParagraphExtra = (text, extra = {}) => {
        if (!cv7991TextHasInlineFormula(text)) return extra || {};
        const output = Object.assign({}, extra || {});
        const spacing = Object.assign({}, output.spacing || {});
        spacing.line = Math.max(Number(spacing.line) || 240, 300);
        output.spacing = spacing;
        return output;
      };
      const cv7991TextRunExtra = (extra = {}) => {
        const clean = Object.assign({}, extra || {});
        delete clean.standaloneEquation;
        delete clean.equationSize;
        return clean;
      };
      const cv7991RememberEquationSize = (equationId, extra = {}) => {
        const key = String(equationId || '').trim();
        if (!key) return;
        const item = equationMap && equationMap[key];
        const rawXml = String(item && (item.xml || item) || '');
        /* Có cỡ nguồn thì giữ nguyên toàn bộ OMML. Chỉ ghi cỡ dự phòng bằng
           chiều cao chữ của dòng khi Equation không mang w:sz. */
        if (/<w:sz(?:Cs)?\b/i.test(rawXml)) return;
        const size = Math.max(12, Math.min(96,
          Math.round(Math.max(6, Number(item && item.sourceCharacterHeightPt) || 12) * 2)
        ));
        if (!size) return;
        const current = Number(cv7991UnsupportedEquationSizes.get(key)) || 0;
        cv7991UnsupportedEquationSizes.set(key, current ? Math.min(current, size) : size);
      };
      const makeRun = (text, extra) => new d.TextRun(Object.assign({ text: String(text || ''), font, size: 24 }, cv7991TextRunExtra(extra)));
      const makeCv7991SectionHeadingRuns = (format, sectionNumber = null) => {
        const label = cv7991FormatLabel(format, sectionNumber);
        const instruction = cv7991SectionInstruction(format);
        if (instruction) {
          return [
            makeRun(`${label}:`, { bold: true }),
            makeRun(' '),
            makeRun(instruction, { italics: true }),
          ];
        }
        return [makeRun(label, { bold: true })];
      };
      const makeRunsFromFormattedText = (textValue, extra) => {
        const source = String(textValue || '');
        const pattern = /<(sub|sup)>([\s\S]*?)<\/\1>/gi;
        const runs = [];
        let lastIndex = 0;
        let match;
        while ((match = pattern.exec(source))) {
          if (match.index > lastIndex) runs.push(makeRun(source.slice(lastIndex, match.index), extra));
          const tag = String(match[1] || '').toLowerCase();
          runs.push(makeRun(match[2] || '', Object.assign({}, extra || {}, tag === 'sub' ? { subScript: true } : { superScript: true })));
          lastIndex = pattern.lastIndex;
        }
        if (lastIndex < source.length) runs.push(makeRun(source.slice(lastIndex), extra));
        return runs.length ? runs : [makeRun('', extra)];
      };
      const cv7991ImageRunType = (image) => {
        const mime = String(image && image.mimeType || '').toLowerCase();
        const path = String(image && image.path || '').toLowerCase();
        if (/jpe?g/.test(mime) || /\.jpe?g$/.test(path)) return 'jpg';
        if (/gif/.test(mime) || /\.gif$/.test(path)) return 'gif';
        if (/bmp/.test(mime) || /\.bmp$/.test(path)) return 'bmp';
        if (/svg/.test(mime) || /\.svg$/.test(path)) return 'svg';
        return 'png';
      };
      const cv7991CanExportImage = (image) => {
        const mime = String(image && image.mimeType || '').toLowerCase();
        const path = String(image && image.path || '').toLowerCase();
        if (/\.(wmf|emf|webp)$/i.test(path)) return false;
        return /^image\/(png|jpe?g|gif|bmp|svg\+xml)$/i.test(mime) || /\.(png|jpe?g|gif|bmp|svg)$/i.test(path);
      };
      const cv7991OriginalImageDisplaySizePt = (image) => {
        const item = (image && typeof image === 'object') ? image : {};
        const displayW = Number(item.sourceDisplayWidthPt) || Number(item.displayWidthPt) || 0;
        const displayH = Number(item.sourceDisplayHeightPt) || Number(item.displayHeightPt) || 0;
        let naturalW = Number(item.naturalWidthPt) || ((Number(item.width) || 0) * 0.75) || 0;
        let naturalH = Number(item.naturalHeightPt) || ((Number(item.height) || 0) * 0.75) || 0;
        if ((!(naturalW > 0) || !(naturalH > 0)) && item.data && typeof cv7991MetafileMetrics === 'function') {
          try {
            const metrics = cv7991MetafileMetrics(item) || {};
            if (!(naturalW > 0)) naturalW = Number(metrics.naturalWidthPt) || 0;
            if (!(naturalH > 0)) naturalH = Number(metrics.naturalHeightPt) || 0;
          } catch (_) {}
        }
        const naturalRatio = naturalW > 0 && naturalH > 0 ? naturalW / naturalH : 0;
        let widthPt = 0;
        let heightPt = 0;
        if (displayW > 0 && displayH > 0) {
          widthPt = displayW;
          heightPt = displayH;
        } else if (displayW > 0) {
          widthPt = displayW;
          heightPt = naturalRatio > 0 ? displayW / naturalRatio : naturalH;
        } else if (displayH > 0) {
          heightPt = displayH;
          widthPt = naturalRatio > 0 ? displayH * naturalRatio : naturalW;
        } else {
          widthPt = naturalW;
          heightPt = naturalH;
        }
        if (!(widthPt > 0) && heightPt > 0 && naturalRatio > 0) widthPt = heightPt * naturalRatio;
        if (!(heightPt > 0) && widthPt > 0 && naturalRatio > 0) heightPt = widthPt / naturalRatio;
        if (!(widthPt > 0)) widthPt = 42;
        if (!(heightPt > 0)) heightPt = 24;
        return { widthPt, heightPt };
      };
      const makeImageRun = (image, extra = {}) => {
        const exportAsset = cv7991WordExportImageAsset(image) || image;
        const fontPt = Math.max(6, (Number(extra && extra.size) || 24) / 2);
        const ordinaryGeometry = cv7991PresenterImageIsFormula(image)
          ? cv7991OrdinaryMathTypeWordExportGeometry(image, fontPt)
          : null;
        const size = ordinaryGeometry ? {
          widthPt: ordinaryGeometry.widthPx * 72 / 96,
          heightPt: ordinaryGeometry.heightPx * 72 / 96,
        } : cv7991OriginalImageDisplaySizePt(image);
        // docx.js nhận transformation theo pixel 96 DPI; đổi từ point của Word
        // để wp:extent trong file xuất ra khớp đúng kích thước file gốc.
        const width = size.widthPt * 96 / 72;
        const height = size.heightPt * 96 / 72;
        return new d.ImageRun({
          data: exportAsset.data,
          type: cv7991ImageRunType(exportAsset),
          transformation: { width, height },
        });
      };
      const makeRunsWithImages = (text, extra) => {
        const raw = String(text || '');
        const effectiveExtra = cv7991EquationSizingExtra(raw, extra || {});
        const runs = [];
        let lastIndex = 0;
        INLINE_TOKEN_RE.lastIndex = 0;
        let match;
        while ((match = INLINE_TOKEN_RE.exec(raw))) {
          const before = raw.slice(lastIndex, match.index);
          if (before) runs.push(...makeRunsFromFormattedText(before, effectiveExtra));
          const kind = String(match[1] || '').toUpperCase();
          const tokenId = String(match[2] || '').trim();
          if (kind === 'IMG') {
            const image = imageMap && imageMap[tokenId];
            const exportAsset = image ? (cv7991WordExportImageAsset(image) || image) : null;
            if (exportAsset && exportAsset.data && cv7991CanExportImage(exportAsset)) {
              runs.push(makeImageRun(image, effectiveExtra));
            } else if (image && image.data) {
              // MathType cũ trong Word thường lưu công thức bằng WMF/EMF.
              // docx.js không xuất trực tiếp được các định dạng này, nên giữ lại token
              // rồi vá trực tiếp vào file .docx sau khi đóng gói để Word hiển thị công thức.
              cv7991UnsupportedImageRelIds.add(tokenId);
              runs.push(makeRun(cv7991ImagePlaceholderToken(tokenId), effectiveExtra));
            }
          } else if (kind === 'OMML') {
            const equation = equationMap && equationMap[tokenId];
            if (equation && (equation.xml || equation)) {
              cv7991UnsupportedEquationIds.add(tokenId);
              cv7991RememberEquationSize(tokenId, effectiveExtra);
              runs.push(makeRun(cv7991EquationPlaceholderToken(tokenId), effectiveExtra));
            } else {
              runs.push(makeRun('[Công thức]', effectiveExtra));
            }
          }
          lastIndex = match.index + match[0].length;
        }
        const after = raw.slice(lastIndex);
        if (after) runs.push(...makeRunsFromFormattedText(after, effectiveExtra));
        return runs.length ? runs : [makeRun('', effectiveExtra)];
      };
      const makePara = (text, extra) => {
        const effectiveExtra = (!Array.isArray(text) && cv7991TextHasInlineFormula(text))
          ? cv7991InlineFormulaParagraphExtra(text, extra || {})
          : (extra || {});
        return new d.Paragraph(Object.assign({
          children: Array.isArray(text) ? text : makeRunsWithImages(text),
          spacing: paraSpacing,
          alignment: d.AlignmentType.LEFT,
        }, effectiveExtra || {}));
      };

      const cv7991EscapeRegExp = (value) => String(value || '').replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
      const cv7991XmlAttrEscape = (value) => String(value || '')
        .replace(/&/g, '&amp;')
        .replace(/"/g, '&quot;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;');
      const cv7991XmlTextEscape = (value) => String(value || '')
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;');
      const cv7991LegacyImageExtension = (image) => {
        const path = String(image && image.path || '').toLowerCase();
        const match = path.match(/\.([a-z0-9]+)$/i);
        if (match) return match[1];
        const mime = String(image && image.mimeType || '').toLowerCase();
        if (/emf/.test(mime)) return 'emf';
        if (/wmf/.test(mime)) return 'wmf';
        if (/webp/.test(mime)) return 'webp';
        if (/jpe?g/.test(mime)) return 'jpg';
        if (/gif/.test(mime)) return 'gif';
        if (/bmp/.test(mime)) return 'bmp';
        if (/svg/.test(mime)) return 'svg';
        return 'png';
      };
      const cv7991LegacyImageContentType = (ext) => {
        const key = String(ext || '').toLowerCase();
        if (key === 'wmf') return 'image/x-wmf';
        if (key === 'emf') return 'image/x-emf';
        if (key === 'webp') return 'image/webp';
        if (key === 'jpg' || key === 'jpeg') return 'image/jpeg';
        if (key === 'gif') return 'image/gif';
        if (key === 'bmp') return 'image/bmp';
        if (key === 'svg') return 'image/svg+xml';
        return 'image/png';
      };
      const cv7991LegacyImageSizePt = (image) => {
        return cv7991OriginalImageDisplaySizePt(image);
      };
      const cv7991EnsureDocumentNamespaces = (xml) => {
        let output = String(xml || '');
        const additions = [];
        if (!/xmlns:v=/.test(output)) additions.push('xmlns:v="urn:schemas-microsoft-com:vml"');
        if (!/xmlns:o=/.test(output)) additions.push('xmlns:o="urn:schemas-microsoft-com:office:office"');
        if (!/xmlns:m=/.test(output)) additions.push('xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"');
        if (!/xmlns:r=/.test(output)) additions.push('xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"');
        if (!/xmlns:wp=/.test(output)) additions.push('xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing"');
        if (!/xmlns:a=/.test(output)) additions.push('xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main"');
        if (!/xmlns:pic=/.test(output)) additions.push('xmlns:pic="http://schemas.openxmlformats.org/drawingml/2006/picture"');
        if (additions.length) output = output.replace(/<w:document\b/, `<w:document ${additions.join(' ')}`);
        return output;
      };
      const cv7991LegacyDrawingRun = (relId, image, index) => {
        const size = cv7991LegacyImageSizePt(image);
        const cx = Math.max(1, Math.round(size.widthPt * 12700));
        const cy = Math.max(1, Math.round(size.heightPt * 12700));
        const name = `cv7991_math_${index}`;
        const safeRelId = cv7991XmlAttrEscape(relId);
        const safeName = cv7991XmlAttrEscape(name);
        return `<w:r><w:drawing><wp:inline distT="0" distB="0" distL="0" distR="0"><wp:extent cx="${cx}" cy="${cy}"/><wp:effectExtent l="0" t="0" r="0" b="0"/><wp:docPr id="${Math.max(1, index)}" name="${safeName}"/><wp:cNvGraphicFramePr><a:graphicFrameLocks noChangeAspect="1"/></wp:cNvGraphicFramePr><a:graphic><a:graphicData uri="http://schemas.openxmlformats.org/drawingml/2006/picture"><pic:pic><pic:nvPicPr><pic:cNvPr id="0" name="${safeName}"/><pic:cNvPicPr/></pic:nvPicPr><pic:blipFill><a:blip r:embed="${safeRelId}"/><a:stretch><a:fillRect/></a:stretch></pic:blipFill><pic:spPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="${cx}" cy="${cy}"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></pic:spPr></pic:pic></a:graphicData></a:graphic></wp:inline></w:drawing></w:r>`;
      };
      const cv7991NormalizeOmmlSizeForPatch = (rawXml, sizeValue) => {
        const explicit = Number(sizeValue);
        if (!Number.isFinite(explicit) || explicit <= 0) return String(rawXml || '');
        const size = Math.max(8, Math.min(96, Math.round(explicit)));
        const rFonts = '<w:rFonts w:ascii="Cambria Math" w:hAnsi="Cambria Math" w:cs="Cambria Math"/>';
        const sizeXml = `<w:sz w:val="${size}"/><w:szCs w:val="${size}"/>`;
        const cleanRunPr = (inner) => String(inner || '')
          .replace(/<w:sz(?:Cs)?\b[^>]*\/>/gi, '')
          .replace(/<w:rFonts\b[^>]*\/>/gi, '');
        const runPrXml = (inner = '') => `<w:rPr>${rFonts}${sizeXml}${cleanRunPr(inner)}</w:rPr>`;
        let output = String(rawXml || '');
        output = output.replace(/<m:r(\s[^>]*)?>([\s\S]*?)<\/m:r>/gi, (all, attrs = '', inner = '') => {
          let body = String(inner || '');
          if (/<w:rPr\b/i.test(body)) {
            body = body.replace(/<w:rPr\b[^>]*>([\s\S]*?)<\/w:rPr>/i, (rpAll, rpInner = '') => runPrXml(rpInner));
          } else if (/<m:rPr\b[\s\S]*?<\/m:rPr>/i.test(body)) {
            body = body.replace(/(<m:rPr\b[\s\S]*?<\/m:rPr>)/i, `$1${runPrXml('')}`);
          } else {
            body = `${runPrXml('')}${body}`;
          }
          return `<m:r${attrs || ''}>${body}</m:r>`;
        });
        output = output.replace(/<m:ctrlPr>([\s\S]*?)<\/m:ctrlPr>/gi, (all, inner = '') => {
          let body = String(inner || '');
          if (/<w:rPr\b/i.test(body)) {
            body = body.replace(/<w:rPr\b[^>]*>([\s\S]*?)<\/w:rPr>/i, (rpAll, rpInner = '') => runPrXml(rpInner));
          } else {
            body = `${runPrXml('')}${body}`;
          }
          return `<m:ctrlPr>${body}</m:ctrlPr>`;
        });
        return output;
      };
      const cv7991CleanOmmlXml = (value, sizeValue = null) => {
        let rawXml = String(value == null ? '' : value).trim().replace(/^<\?xml[^>]*>\s*/i, '');
        if (!rawXml) return '';
        if (!/^<m:oMath(?:Para)?\b/i.test(rawXml)) return '';
        if (!/\sxmlns:m=/i.test(rawXml)) {
          rawXml = rawXml.replace(/^<m:(oMathPara|oMath)\b/i, '<m:$1 xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"');
        }
        return Number(sizeValue) > 0 ? cv7991NormalizeOmmlSizeForPatch(rawXml, sizeValue) : rawXml;
      };
      const cv7991PatchDocxUnsupportedImages = async (blob) => {
        if (!cv7991UnsupportedImageRelIds.size || !window.JSZip) return blob;
        const buffer = await blob.arrayBuffer();
        const zip = await window.JSZip.loadAsync(buffer);
        const docEntry = zip.file('word/document.xml');
        if (!docEntry) return blob;
        let documentXml = await docEntry.async('string');
        const relsPath = 'word/_rels/document.xml.rels';
        const relsEntry = zip.file(relsPath);
        let relsXml = relsEntry
          ? await relsEntry.async('string')
          : '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"></Relationships>';
        const typesEntry = zip.file('[Content_Types].xml');
        let contentTypesXml = typesEntry ? await typesEntry.async('string') : '';
        const patches = [];
        let counter = 1;
        cv7991UnsupportedImageRelIds.forEach((sourceRelId) => {
          const image = imageMap && imageMap[sourceRelId];
          if (!image || !image.data) return;
          const ext = cv7991LegacyImageExtension(image);
          const safeId = String(sourceRelId || '').replace(/[^A-Za-z0-9_\-]+/g, '_') || String(counter);
          const mediaPath = `word/media/cv7991_math_${safeId}_${counter}.${ext}`;
          const newRelId = `rIdCv7991Math${counter}`;
          zip.file(mediaPath, image.data);
          relsXml = relsXml.replace('</Relationships>', `<Relationship Id="${cv7991XmlAttrEscape(newRelId)}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${cv7991XmlAttrEscape(mediaPath.split('/').pop())}"/></Relationships>`);
          const contentType = cv7991LegacyImageContentType(ext);
          const defaultRe = new RegExp(`<Default\\s+[^>]*Extension=["']${cv7991EscapeRegExp(ext)}["'][^>]*/>`, 'i');
          if (contentTypesXml && !defaultRe.test(contentTypesXml)) {
            contentTypesXml = contentTypesXml.replace('</Types>', `<Default Extension="${cv7991XmlAttrEscape(ext)}" ContentType="${cv7991XmlAttrEscape(contentType)}"/></Types>`);
          }
          patches.push({ token: cv7991ImagePlaceholderToken(sourceRelId), relId: newRelId, image, index: counter });
          counter += 1;
        });
        if (!patches.length) return blob;
        documentXml = cv7991EnsureDocumentNamespaces(documentXml);
        patches.forEach((patch) => {
          const escapedToken = cv7991EscapeRegExp(cv7991XmlTextEscape(patch.token));
          const runRe = new RegExp(`<w:r[^>]*>\\s*(?:<w:rPr>[\\s\\S]*?<\\/w:rPr>\\s*)?<w:t[^>]*>${escapedToken}<\\/w:t>\\s*<\\/w:r>`, 'g');
          documentXml = documentXml.replace(runRe, cv7991LegacyDrawingRun(patch.relId, patch.image, patch.index));
        });
        zip.file('word/document.xml', documentXml);
        zip.file(relsPath, relsXml);
        if (contentTypesXml) zip.file('[Content_Types].xml', contentTypesXml);
        return await zip.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      };
      const cv7991PatchDocxEquations = async (blob) => {
        if (!cv7991UnsupportedEquationIds.size || !window.JSZip) return blob;
        const buffer = await blob.arrayBuffer();
        const zip = await window.JSZip.loadAsync(buffer);
        const docEntry = zip.file('word/document.xml');
        if (!docEntry) return blob;
        let documentXml = await docEntry.async('string');
        const patches = [];
        cv7991UnsupportedEquationIds.forEach((equationId) => {
          const key = String(equationId || '').trim();
          const item = equationMap && equationMap[key];
          const rawXml = cv7991CleanOmmlXml(item && (item.xml || item), cv7991UnsupportedEquationSizes.get(key) || null);
          if (!rawXml) return;
          patches.push({ token: cv7991EquationPlaceholderToken(equationId), xml: rawXml });
        });
        if (!patches.length) return blob;
        documentXml = cv7991EnsureDocumentNamespaces(documentXml);
        patches.forEach((patch) => {
          const escapedToken = cv7991EscapeRegExp(cv7991XmlTextEscape(patch.token));
          const runRe = new RegExp(`<w:r[^>]*>\\s*(?:<w:rPr>[\\s\\S]*?<\\/w:rPr>\\s*)?<w:t[^>]*>${escapedToken}<\\/w:t>\\s*<\\/w:r>`, 'g');
          documentXml = documentXml.replace(runRe, patch.xml);
        });
        zip.file('word/document.xml', documentXml);
        return await zip.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      };
      const packCv7991Docx = async (doc) => {
        let blob = await d.Packer.toBlob(doc);
        blob = await cv7991PatchDocxUnsupportedImages(blob);
        blob = await cv7991PatchDocxEquations(blob);
        return blob;
      };

      const makeQuestionPara = (number, text) => {
        const lines = String(text || '').split('\n').filter((line) => line.trim());
        if (!lines.length) return [makePara([makeRun(`Câu ${number}.`, { bold: true })])];
        const blocks = [];
        const firstLine = lines[0].trim();
        const firstTableId = tableTokenOnly(firstLine);
        if (firstTableId && tableMap && tableMap[firstTableId]) {
          blocks.push(makePara([makeRun(`Câu ${number}. `, { bold: true })]));
          blocks.push(makeDataTable(tableMap[firstTableId]));
        } else {
          blocks.push(makePara([makeRun(`Câu ${number}. `, { bold: true }), ...makeRunsWithImages(firstLine)], cv7991InlineFormulaParagraphExtra(firstLine, {})));
        }
        lines.slice(1).forEach((line) => {
          const tableId = tableTokenOnly(line);
          if (tableId && tableMap && tableMap[tableId]) blocks.push(makeDataTable(tableMap[tableId]));
          else blocks.push(makePara(line));
        });
        return blocks;
      };
      const noBorder = {
        top: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
        bottom: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
        left: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
        right: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
        insideHorizontal: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
        insideVertical: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
      };
      const gridBorder = {
        top: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
        bottom: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
        left: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
        right: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
        insideHorizontal: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
        insideVertical: { style: d.BorderStyle.SINGLE, size: 4, color: '000000' },
      };
      const makeCell = (content, extra) => {
        const opts = Object.assign({}, extra || {});
        const marginY = Math.max(0, Math.floor(Number.isFinite(Number(opts.marginY)) ? Number(opts.marginY) : 60));
        const marginX = Math.max(0, Math.floor(Number.isFinite(Number(opts.marginX)) ? Number(opts.marginX) : 80));
        const align = opts.align || d.AlignmentType.CENTER;
        const size = Number(opts.size) || 24;
        const bold = !!opts.bold;
        const color = opts.color ? String(opts.color).replace(/^#/, '') : '';
        const line = Number(opts.line) || 240;
        const lineRule = opts.lineRule;
        const verticalAlign = opts.verticalAlign;
        const width = opts.width ? { size: Math.max(1, Math.floor(opts.width)), type: opts.widthType || ((d.WidthType && d.WidthType.DXA) || 'dxa') } : opts.width;
        delete opts.marginY;
        delete opts.marginX;
        delete opts.align;
        delete opts.size;
        delete opts.bold;
        delete opts.color;
        delete opts.line;
        delete opts.lineRule;
        delete opts.widthType;
        delete opts.verticalAlign;
        if (width) opts.width = width;
        if (verticalAlign) opts.verticalAlign = (verticalAlign === 'center' && d.VerticalAlign && d.VerticalAlign.CENTER) ? d.VerticalAlign.CENTER : verticalAlign;
        opts.margins = { top: marginY, bottom: marginY, left: marginX, right: marginX };
        opts.children = Array.isArray(content)
          ? content
          : [makePara([makeRun(String(content || ''), { size, bold, color })], { alignment: align, spacing: { before: 0, after: 0, line, lineRule } })];
        return new d.TableCell(opts);
      };
      const makeCv7991HeaderCell = (runs, align = d.AlignmentType.LEFT, widthPercent = 50) => new d.TableCell({
        width: { size: widthPercent, type: d.WidthType.PERCENTAGE },
        margins: { top: 0, bottom: 0, left: 0, right: 0 },
        borders: noBorder,
        children: [makePara(Array.isArray(runs) ? runs : [makeRun(String(runs || ''))], {
          alignment: align,
          spacing: { before: 0, after: 0, line: 240 },
        })],
      });
      const makeCv7991ExamHeaderTable = (version) => {
        const nameText = String(version && version.studentName || '').trim() || '...............................................................';
        const classText = String(version && version.classLabel || '').trim() || '...............';
        const codeText = cv7991DisplayExamCode(version && version.code);
        return new d.Table({
          width: { size: 100, type: d.WidthType.PERCENTAGE },
          borders: noBorder,
          rows: [
            new d.TableRow({
              children: [
                makeCv7991HeaderCell([makeRun(examTitle, { italics: true })], d.AlignmentType.LEFT, 70),
                makeCv7991HeaderCell([makeRun(`MÃ ĐỀ ${codeText}`, { bold: true })], d.AlignmentType.RIGHT, 30),
              ],
            }),
            new d.TableRow({
              children: [
                makeCv7991HeaderCell([makeRun('Họ và tên: '), makeRun(nameText, { bold: true })], d.AlignmentType.LEFT, 70),
                makeCv7991HeaderCell([makeRun(`Lớp: ${classText}`)], d.AlignmentType.RIGHT, 30),
              ],
            }),
          ],
        });
      };
      const makeCv7991ExamHeaderParagraphs = (version) => [makeCv7991ExamHeaderTable(version)];
      const makeDataTable = (tableData) => {
        const rows = Array.isArray(tableData && tableData.rows) ? tableData.rows : [];
        if (!rows.length) return makePara('');
        const isTextBoxTable = !!(tableData && tableData.isTextBoxTable);
        const maxCols = Math.max(1, ...rows.map((row) => (Array.isArray(row) ? row : []).reduce((sum, cell) => sum + Math.max(1, Number(cell && cell.gridSpan) || 1), 0)));
        const sourceWidths = Array.isArray(tableData && tableData.columnWidths)
          ? tableData.columnWidths.map((value) => Math.max(0, Number(value) || 0)) : [];
        const totalSourceWidth = sourceWidths.reduce((sum, value) => sum + value, 0);
        const rowHeightsPx = Array.isArray(tableData && tableData.sourceRowHeightsPx)
          ? tableData.sourceRowHeightsPx : [];
        return new d.Table({
          width: { size: 100, type: d.WidthType.PERCENTAGE },
          borders: gridBorder,
          rows: rows.map((row, rowIndex) => {
            const rowOptions = {
              children: (Array.isArray(row) ? row : []).map((cell) => {
                const span = Math.max(1, Number(cell && cell.gridSpan) || 1);
                const colStart = Math.max(0, Number(cell && cell.colStart) || 0);
                const colEnd = Math.max(colStart + span, Number(cell && cell.colEnd) || (colStart + span));
                const sourceCellWidth = totalSourceWidth > 0
                  ? sourceWidths.slice(colStart, colEnd).reduce((sum, value) => sum + value, 0)
                  : 0;
                const widthPct = sourceCellWidth > 0
                  ? Math.max(1, sourceCellWidth / totalSourceWidth * 100)
                  : Math.max(1, Math.floor(100 / maxCols) * span);
                const rawVAlign = String(cell && cell.vAlign || '').toLowerCase();
                const verticalAlign = rawVAlign === 'middle'
                  ? ((d.VerticalAlign && d.VerticalAlign.CENTER) || 'center')
                  : (rawVAlign === 'bottom'
                    ? ((d.VerticalAlign && d.VerticalAlign.BOTTOM) || 'bottom')
                    : ((d.VerticalAlign && d.VerticalAlign.TOP) || 'top'));
                const paras = String(cell && cell.text || '').split('\n')
                  .filter((line) => line.trim())
                  .map((line) => makePara(makeRunsWithImages(line), { alignment: d.AlignmentType.CENTER }));
                return new d.TableCell({
                  columnSpan: span,
                  width: { size: widthPct, type: d.WidthType.PERCENTAGE },
                  verticalAlign,
                  margins: isTextBoxTable
                    ? { top: 0, bottom: 0, left: 12, right: 12 }
                    : { top: 60, bottom: 60, left: 80, right: 80 },
                  children: paras.length ? paras : [makePara('', { alignment: d.AlignmentType.CENTER })],
                });
              }),
            };
            const rowPx = Math.max(0, Number(rowHeightsPx[rowIndex]) || 0);
            if (isTextBoxTable && rowPx > 0) {
              rowOptions.height = {
                value: Math.max(1, Math.round(rowPx * 15)),
                rule: (d.HeightRule && d.HeightRule.ATLEAST) || 'atLeast'
              };
            }
            return new d.TableRow(rowOptions);
          }),
        });
      };
      const tableTokenOnly = (line) => {
        const match = String(line || '').trim().match(/^\[\[CV7991_TBL:([^\]]+)\]\]$/);
        return match ? match[1] : '';
      };
      const appendTextWithTableTokens = (target, text, makeTextParagraph) => {
        const rawLines = String(text || '').split('\n');
        rawLines.forEach((rawLine) => {
          const line = rawLine.trim();
          if (!line) return;
          const tableId = tableTokenOnly(line);
          if (tableId && tableMap && tableMap[tableId]) {
            target.push(makeDataTable(tableMap[tableId]));
          } else {
            target.push(makeTextParagraph(line));
          }
        });
      };
      const cv7991AnswerLetterForWord = (value) => {
        const match = String(value || '').trim().toUpperCase().match(/[A-D]/);
        return match ? match[0] : '';
      };
      const cv7991OptionIsCorrectForWord = (opt, answerLetter) => {
        const correctLetter = cv7991AnswerLetterForWord(answerLetter);
        return !!correctLetter && String(opt && opt.letter || '').trim().toUpperCase() === correctLetter;
      };
      const cv7991OptionColorExtraForWord = (opt, answerLetter, extra = {}) => cv7991OptionIsCorrectForWord(opt, answerLetter)
        ? Object.assign({}, extra || {}, { color: 'FF0000' })
        : Object.assign({}, extra || {});
      const makeOptionCell = (opt, widthPercent, answerLetter = '') => new d.TableCell({
        width: { size: widthPercent, type: d.WidthType.PERCENTAGE },
        margins: { top: 30, bottom: 30, left: 0, right: 120 },
        borders: noBorder,
        children: [makePara([
          makeRun(`${opt.letter}.`, cv7991OptionColorExtraForWord(opt, answerLetter, { bold: true })),
          makeRun(' ', cv7991OptionColorExtraForWord(opt, answerLetter)),
          ...makeRunsWithImages(cv7991NormalizeOptionText(opt.text), cv7991OptionColorExtraForWord(opt, answerLetter))
        ], cv7991InlineFormulaParagraphExtra(cv7991NormalizeOptionText(opt.text), {}))],
      });
      const makeBorderlessOptionTable = (rowOptions, mode, answerLetter = '') => {
        const rowsData = mode === 'row4'
          ? [rowOptions]
          : (mode === 'grid2' ? [rowOptions.slice(0, 2), rowOptions.slice(2, 4)] : rowOptions.map((opt) => [opt]));
        const colCount = mode === 'row4' ? 4 : (mode === 'grid2' ? 2 : 1);
        return new d.Table({
          width: { size: 100, type: d.WidthType.PERCENTAGE },
          borders: noBorder,
          rows: rowsData.map((row) => new d.TableRow({
            children: row.map((opt) => makeOptionCell(opt, Math.floor(100 / colCount), answerLetter)),
          })),
        });
      };
      const makeTabbedOptionParagraph = (items, tabPositions) => {
        const runs = [];
        (Array.isArray(items) ? items : []).forEach((item, index) => {
          if (index > 0) runs.push(makeRun('\t'));
          runs.push(makeRun(`${item.letter}.`, { bold: true }));
          runs.push(makeRun(' '));
          runs.push(...makeRunsWithImages(cv7991NormalizeOptionText(item.text)));
        });
        const combinedText = (Array.isArray(items) ? items : []).map((item) => cv7991NormalizeOptionText(item && item.text)).join(' ');
        return makePara(runs, cv7991InlineFormulaParagraphExtra(combinedText, {
          tabStops: (Array.isArray(tabPositions) ? tabPositions : []).map((position) => ({ type: d.TabStopType.LEFT, position })),
        }));
      };
      const optionListHasLatex = (options) => (Array.isArray(options) ? options : []).some((opt) => cv7991HasLatexText(opt && opt.text));
      const optionListHasImages = (options) => (Array.isArray(options) ? options : []).some((opt) => /\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]/.test(String(opt && opt.text || '')));
      const equationTokenCharLength = (equationId) => {
        const item = equationMap && equationMap[String(equationId || '').trim()];
        const rawXml = String((item && (item.xml || item)) || '');
        const mathText = String(item && item.text || '').trim() || rawXml.replace(/<[^>]+>/g, '').replace(/\s+/g, '');
        return Math.max(2, Math.min(24, mathText.length || 8));
      };
      const OPTION_LINE_WIDTH = 92;
      const MIN_OPTION_GAP = 10;
      // Ước lượng số ký tự tối đa để mỗi phương án KHÔNG bị tự xuống dòng trong ô.
      // Nếu một phương án dài hơn ngưỡng của bố cục 1 dòng/2 dòng thì chuyển hẳn sang 4 dòng.
      const OPTION_ROW4_CELL_WIDTH = 20;
      const OPTION_GRID2_CELL_WIDTH = 42;
      const optionTextLength = (opt) => cv7991NormalizeOptionText(opt && opt.text)
        .replace(IMG_TOKEN_RE, '')
        .replace(OMML_TOKEN_RE, (all, equationId) => 'x'.repeat(equationTokenCharLength(equationId)))
        .replace(TBL_TOKEN_RE, '')
        .replace(/\$([^$]+)\$/g, '$1')
        .length + 3;
      const optionLineFits = (items, maxCellChars) => {
        const row = Array.isArray(items) ? items : [];
        const total = row.reduce((sum, item) => sum + optionTextLength(item), 0);
        const noCellWillWrap = row.every((item) => optionTextLength(item) <= maxCellChars);
        return noCellWillWrap && total + Math.max(0, row.length - 1) * MIN_OPTION_GAP <= OPTION_LINE_WIDTH;
      };
      const optionLayoutMode = (opts) => {
        const row = Array.isArray(opts) ? opts : [];
        if (row.length !== 4) return 'stack';
        if (optionLineFits(row, OPTION_ROW4_CELL_WIDTH)) return 'row4';
        if (optionLineFits(row.slice(0, 2), OPTION_GRID2_CELL_WIDTH) && optionLineFits(row.slice(2, 4), OPTION_GRID2_CELL_WIDTH)) return 'grid2';
        // Có ít nhất một phương án dài: không để Word tự xuống dòng trong ô 2 cột/4 cột,
        // mà chuyển sang 4 dòng A, B, C, D riêng biệt.
        return 'stack';
      };
      const appendOptionWithPossibleTables = (children, opt, labelSuffix = '.', answerLetter = '') => {
        const parts = String(cv7991NormalizeOptionText(opt && opt.text) || '').split(/(\[\[CV7991_TBL:[^\]]+\]\])/g).filter((part) => part && part.trim());
        const firstText = [];
        let wroteHeader = false;
        parts.forEach((part) => {
          const tableId = tableTokenOnly(part);
          if (tableId && tableMap && tableMap[tableId]) {
            if (!wroteHeader) {
              children.push(makePara([makeRun(`${opt.letter}${labelSuffix}`, cv7991OptionColorExtraForWord(opt, answerLetter, { bold: true }))]));
              wroteHeader = true;
            }
            children.push(makeDataTable(tableMap[tableId]));
          } else if (!wroteHeader) {
            children.push(makePara([
              makeRun(`${opt.letter}${labelSuffix}`, cv7991OptionColorExtraForWord(opt, answerLetter, { bold: true })),
              makeRun(' ', cv7991OptionColorExtraForWord(opt, answerLetter)),
              ...makeRunsWithImages(part.trim(), cv7991OptionColorExtraForWord(opt, answerLetter))
            ], cv7991InlineFormulaParagraphExtra(part.trim(), {})));
            wroteHeader = true;
          } else {
            children.push(makePara(makeRunsWithImages(part.trim(), cv7991OptionColorExtraForWord(opt, answerLetter))));
          }
        });
        if (!wroteHeader) children.push(makePara([makeRun(`${opt.letter}${labelSuffix}`, cv7991OptionColorExtraForWord(opt, answerLetter, { bold: true }))]));
      };
      const makeOptionRunsForWord = (opt, labelSuffix = '.', answerLetter = '') => [
        makeRun(`${opt.letter}${labelSuffix}`, cv7991OptionColorExtraForWord(opt, answerLetter, { bold: true })),
        makeRun(' ', cv7991OptionColorExtraForWord(opt, answerLetter)),
        ...makeRunsWithImages(cv7991NormalizeOptionText(opt && opt.text), cv7991OptionColorExtraForWord(opt, answerLetter))
      ];
      const makeSpacedOptionParagraph = (items, labelSuffix = '.', answerLetter = '') => {
        const row = Array.isArray(items) ? items : [];
        const runs = [];
        const gaps = [];
        const gapCount = Math.max(0, row.length - 1);
        if (gapCount > 0) {
          const totalTextLength = row.reduce((sum, item) => sum + optionTextLength(item), 0);
          const availableGap = Math.max(MIN_OPTION_GAP * gapCount, OPTION_LINE_WIDTH - totalTextLength);
          const baseGap = Math.max(MIN_OPTION_GAP, Math.floor(availableGap / gapCount));
          let remainder = Math.max(0, availableGap - baseGap * gapCount);
          for (let i = 0; i < gapCount; i += 1) {
            gaps.push(baseGap + (remainder > 0 ? 1 : 0));
            if (remainder > 0) remainder -= 1;
          }
        }
        row.forEach((item, index) => {
          if (index > 0) runs.push(makeRun(' '.repeat(gaps[index - 1] || MIN_OPTION_GAP)));
          runs.push(...makeOptionRunsForWord(item, labelSuffix, answerLetter));
        });
        const combinedText = row.map((item) => cv7991NormalizeOptionText(item && item.text)).join(' ');
        return makePara(runs, cv7991InlineFormulaParagraphExtra(combinedText, {}));
      };
      const appendPlainOptionRows = (children, opts, mode, answerLetter = '') => {
        if (mode === 'row4') {
          children.push(makeSpacedOptionParagraph(opts, '.', answerLetter));
          return;
        }
        if (mode === 'grid2') {
          children.push(makeSpacedOptionParagraph(opts.slice(0, 2), '.', answerLetter));
          children.push(makeSpacedOptionParagraph(opts.slice(2, 4), '.', answerLetter));
          return;
        }
        opts.forEach((opt) => children.push(makePara(makeOptionRunsForWord(opt, '.', answerLetter), cv7991InlineFormulaParagraphExtra(cv7991NormalizeOptionText(opt && opt.text), {}))));
      };
      const appendMcOptions = (children, options, answerLetter = '') => {
        const opts = Array.isArray(options) ? options : [];
        if (opts.some((opt) => /\[\[CV7991_TBL:/.test(String(opt && opt.text || '')))) {
          opts.forEach((opt) => appendOptionWithPossibleTables(children, opt, '.', answerLetter));
          return;
        }
        if (opts.length !== 4) {
          opts.forEach((opt) => children.push(makePara(makeOptionRunsForWord(opt, '.', answerLetter), cv7991InlineFormulaParagraphExtra(cv7991NormalizeOptionText(opt && opt.text), {}))));
          return;
        }
        const mode = optionLayoutMode(opts);
        if (optionListHasLatex(opts) || optionListHasImages(opts)) {
          // Có công thức/MathType: tuyệt đối không đưa phương án vào bảng/khung.
          // Cách này giữ nguyên luồng đề bình thường và tránh lỗi Word gom công thức lên đầu file.
          appendPlainOptionRows(children, opts, mode, answerLetter);
          return;
        }
        if (mode === 'row4') {
          // 4 phương án trên cùng một dòng: dùng bảng ẩn 4 cột để các đáp án giãn đều toàn dòng.
          children.push(makeBorderlessOptionTable(opts, 'row4', answerLetter));
          return;
        }
        if (mode === 'grid2') {
          // 2 phương án/dòng: dùng bảng ẩn 2 cột để không bị dồn về bên trái.
          children.push(makeBorderlessOptionTable(opts, 'grid2', answerLetter));
          return;
        }
        opts.forEach((opt) => children.push(makePara(makeOptionRunsForWord(opt, '.', answerLetter), cv7991InlineFormulaParagraphExtra(cv7991NormalizeOptionText(opt && opt.text), {}))));
      };
      const appendQuestion = (children, parsedQuestion, markCorrectAnswer = false) => {
        makeQuestionPara(parsedQuestion.displayNumber, parsedQuestion.prompt).forEach((p) => children.push(p));
        if (parsedQuestion.format === 'mc') {
          appendMcOptions(children, parsedQuestion.options, markCorrectAnswer ? parsedQuestion.answer : '');
        } else if (parsedQuestion.format === 'tf') {
          const tfRows = [
            new d.TableRow({ children: [
              makeCell('Nội dung', { width: 86, widthType: d.WidthType.PERCENTAGE, bold: true, align: d.AlignmentType.CENTER, verticalAlign: 'center' }),
              makeCell('Đ hoặc S', { width: 14, widthType: d.WidthType.PERCENTAGE, bold: true, align: d.AlignmentType.CENTER, verticalAlign: 'center' })
            ] })
          ];
          (parsedQuestion.statements || []).forEach((item) => {
            const safeItem = Object.assign({}, item || {}, { text: cv7991StripAnswerHintTokens(String(item && item.text || '').trim()) });
            tfRows.push(new d.TableRow({ children: [
              makeCell([makePara(makeOptionRunsForWord(safeItem, ')'), { alignment: d.AlignmentType.LEFT, spacing: { before: 0, after: 0, line: 240 } })], { width: 86, widthType: d.WidthType.PERCENTAGE, verticalAlign: 'center' }),
              makeCell('', { width: 14, widthType: d.WidthType.PERCENTAGE, align: d.AlignmentType.CENTER, verticalAlign: 'center' })
            ] }));
          });
          children.push(new d.Table({ width: { size: 100, type: d.WidthType.PERCENTAGE }, borders: gridBorder, rows: tfRows }));
        } else if (parsedQuestion.format === 'short') {
          children.push(makePara('Trả lời: ........................................'));
        } else if (parsedQuestion.format === 'essay') {
          // Tự luận chỉ in đề bài; không chèn dòng "Bài làm" hoặc dòng chấm trong bản Word xuất theo CV 7991.
        }
      };
      const appendReviewOutlineQuestion = (target, parsedQuestion, markCorrectAnswer = false) => {
        makeQuestionPara(parsedQuestion.displayNumber, parsedQuestion.prompt).forEach((p) => target.push(p));
        if (parsedQuestion.format === 'mc') {
          appendMcOptions(target, parsedQuestion.options, markCorrectAnswer ? parsedQuestion.answer : '');
        } else if (parsedQuestion.format === 'tf') {
          parsedQuestion.statements.forEach((item) => appendOptionWithPossibleTables(target, item, ')'));
        }
      };
      const cv7991ReviewRequestKey = (item) => [
        String(item && item.unitKey || cv7991UnitKey(item && item.unit)).trim(),
        String(item && item.format || '').trim(),
        String(item && item.level || '').trim()
      ].join('|');
      const cv7991SafeDocxNamePart = (value) => {
        const text = String(value || 'de_cuong_on_tap').trim() || 'de_cuong_on_tap';
        return text.replace(/[\\/:*?"<>|]+/g, '_').replace(/\s+/g, '_').replace(/^_+|_+$/g, '').slice(0, 80) || 'de_cuong_on_tap';
      };
      const cv7991SafeDocxFileName = (value, fallback = 'de_kiem_tra_CV7991') => {
        const base = String(value || fallback).trim() || fallback;
        return base
          .replace(/[\\/:*?"<>|]+/g, '_')
          .replace(/\s+/g, ' ')
          .replace(/[. ]+$/g, '')
          .slice(0, 120) || fallback;
      };
      const makeExportDoc = (docChildren) => new d.Document({
        creator: 'MVIP',
        styles: { default: { document: { run: { font, size: 24 } } } },
        sections: [{ properties: { page: { margin: { top: TWIP_CM_LOCAL, right: TWIP_CM_LOCAL, bottom: TWIP_CM_LOCAL, left: TWIP_CM_LOCAL }, size: { width: 11906, height: 16838 } } }, children: docChildren }],
      });
      const makePlainCell = (text, extra = {}) => new d.TableCell({
        margins: { top: 60, bottom: 60, left: 80, right: 80 },
        children: [makePara([makeRun(String(text || ''), { bold: !!extra.bold })], { alignment: extra.align || d.AlignmentType.LEFT })],
      });
      const makeSimpleTable = (headers, rows) => new d.Table({
        width: { size: 100, type: d.WidthType.PERCENTAGE },
        borders: gridBorder,
        rows: [
          new d.TableRow({ children: headers.map((header) => makePlainCell(header, { bold: true, align: d.AlignmentType.CENTER })) }),
          ...(Array.isArray(rows) ? rows : []).map((row) => new d.TableRow({ children: row.map((cell) => makePlainCell(cell)) })),
        ],
      });
      const appendCv7991MatrixSpecSections = (target, reviewRequests, headingText = 'MA TRẬN VÀ BẢNG ĐẶC TẢ') => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        const showSpecQuestionNumbers = !!(options && options.showSpecQuestionNumbers);
        const firstVersion = (Array.isArray(versions) ? versions : []).find((entry) => entry && Array.isArray(entry.questions));
        const questionNumbersByCell = new Map();
        if (showSpecQuestionNumbers && firstVersion) {
          firstVersion.questions.forEach((question, questionIndex) => {
            const key = `${cv7991UnitKey(question && question.unit)}|${String(question && question.format || 'mc')}|${String(question && question.level || 'b')}`;
            if (!questionNumbersByCell.has(key)) questionNumbersByCell.set(key, []);
            questionNumbersByCell.get(key).push(questionIndex + 1);
          });
        }
        const specValueForRequest = (request) => {
          const count = Math.max(0, Number(request && request.count) || 0);
          if (!count) return '';
          if (!showSpecQuestionNumbers) return String(count);
          const key = `${cv7991UnitKey(request && request.item && request.item.unit)}|${String(request && request.format || 'mc')}|${String(request && request.level || 'b')}`;
          const numbers = questionNumbersByCell.get(key) || [];
          return numbers.length ? numbers.map((number) => `Câu ${number}`).join(', ') : String(count);
        };
        target.push(makePara([makeRun(headingText, { bold: true, size: 28 })], { alignment: d.AlignmentType.CENTER }));
        target.push(makePara(examTitle, { alignment: d.AlignmentType.CENTER }));
        target.push(makePara([makeRun('MA TRẬN', { bold: true })], { spacing: { before: 180, after: 0, line: 240 } }));
        target.push(makeSimpleTable(
          ['STT', 'Chương', 'Bài/Nội dung', 'Dạng câu hỏi', 'Mức độ', 'Số câu'],
          selected.map((request, index) => [
            String(index + 1),
            request.item && request.item.chapter,
            request.item && request.item.unit,
            cv7991BankFormatLabel(request.format),
            cv7991LevelLabel(request.level),
            String(request.count),
          ])
        ));
        target.push(makePara([makeRun('BẢNG ĐẶC TẢ', { bold: true })], { spacing: { before: 240, after: 0, line: 240 } }));
        target.push(makeSimpleTable(
          ['STT', 'Chương', 'Bài/Nội dung', 'Mức độ', 'Yêu cầu cần đạt', 'Dạng câu hỏi', showSpecQuestionNumbers ? 'Câu số trong đề' : 'Số câu'],
          selected.map((request, index) => [
            String(index + 1),
            request.item && request.item.chapter,
            request.item && request.item.unit,
            cv7991LevelLabel(request.level),
            request.item && request.item.requirements && request.item.requirements[request.level],
            cv7991BankFormatLabel(request.format),
            specValueForRequest(request),
          ])
        ));
      };
      const cv7991ReviewOutlineSectionLabel = (format) => {
        if (format === 'tf') return 'II. Trắc nghiệm đúng - sai';
        if (format === 'short') return 'III. Trả lời ngắn';
        if (format === 'essay') return 'IV. Tự luận';
        return 'I. Trắc nghiệm nhiều lựa chọn';
      };
      const cv7991ReviewQuestionsForRequest = (questions, request) => (Array.isArray(questions) ? questions : []).filter((question) => {
        return String(question && question.format || '') === String(request && request.format || '')
          && String(question && question.level || '') === String(request && request.level || '')
          && cv7991UnitKey(question && question.unit) === String(request && request.unitKey || cv7991UnitKey(request && request.item && request.item.unit));
      });
      const appendCv7991BankAnswer = (target, answerText) => {
        const raw = String(answerText || '').replace(/\r/g, '').trim();
        if (!raw) return;
        let normalized = /^\s*(Đáp án|Hướng dẫn chấm|Đáp án và thang điểm)\s*:/i.test(raw) ? raw : `Đáp án: ${raw}`;
        normalized = normalized.replace(/^\s*Hướng dẫn chấm\s*:/i, 'Đáp án và thang điểm:');
        appendTextWithTableTokens(target, normalized, (line) => makePara(line, /^\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]$/.test(line)
          ? { alignment: d.AlignmentType.CENTER, spacing: { before: 60, after: 60, line: 240 } }
          : undefined));
      };
      const appendCv7991BankGuide = (target, question) => {
        const guide = cv7991QuestionGuideForExport(question);
        if (!guide) return;
        let wroteLabel = false;
        const pushLabelOnly = () => {
          if (wroteLabel) return;
          target.push(makePara([makeRun('Hướng dẫn giải:', { bold: true, italics: true, color: '1F4E79' })], { spacing: { before: 40, after: 0, line: 240 } }));
          wroteLabel = true;
        };
        guide.split('\n').map((line) => String(line || '').trim()).filter(Boolean).forEach((line) => {
          const tableId = tableTokenOnly(line);
          if (tableId && tableMap && tableMap[tableId]) {
            pushLabelOnly();
            target.push(makeDataTable(tableMap[tableId]));
            return;
          }
          const prefixRuns = wroteLabel ? [] : [makeRun('Hướng dẫn giải: ', { bold: true, italics: true, color: '1F4E79' })];
          target.push(makePara([
            ...prefixRuns,
            ...makeRunsWithImages(line)
          ], cv7991InlineFormulaParagraphExtra(line, { spacing: { before: 40, after: 0, line: 240 } })));
          wroteLabel = true;
        });
      };

      const cv7991QuestionCompetencyText = (question) => String(
        question && question.competency
        || cv7991CompetencyFromLine(question && question.answer)
        || cv7991CompetencyFromLine(question && question.text)
        || ''
      ).replace(/^\s*Năng\s*lực\s*:\s*/i, '').replace(/\s+/g, ' ').trim();
      const appendCv7991QuestionCompetency = (target, question) => {
        const competency = cv7991QuestionCompetencyText(question);
        if (!competency) return;
        // Đã bỏ dòng Năng lực theo yêu cầu.
      };
      const appendCv7991ReviewBankSpec = (target, reviewRequests) => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        if (!selected.length) return;
        const levelsForSpec = ['b', 'h', 'v', 'vdc'];
        const levelHeaders = { b: 'Nhận biết', h: 'Thông hiểu', v: 'Vận dụng', vdc: 'Vận dụng cao' };
        const byUnit = new Map();
        selected.forEach((request) => {
          const item = request.item || {};
          const key = String(request.unitKey || item.unitKey || cv7991UnitKey(item.unit)).trim() || `unit-${byUnit.size + 1}`;
          if (!byUnit.has(key)) byUnit.set(key, { item, requests: [] });
          byUnit.get(key).requests.push(request);
        });
        const rows = [];
        let rowIndex = 1;
        byUnit.forEach((group) => {
          const item = group.item || {};
          const reqByLevel = Object.create(null);
          group.requests.forEach((request) => {
            const level = levelsForSpec.includes(request.level) ? request.level : 'b';
            const reqText = String(item.requirements && item.requirements[level] || cv7991InferRequirement(item.unit || '', level) || '').trim();
            if (!reqText) return;
            if (!reqByLevel[level]) reqByLevel[level] = [];
            if (!reqByLevel[level].includes(reqText)) reqByLevel[level].push(reqText);
          });
          rows.push([
            String(rowIndex),
            item.chapter || '',
            item.unit || '',
            ...levelsForSpec.map((level) => (reqByLevel[level] || []).join('\n')),
          ]);
          rowIndex += 1;
        });
        target.push(makePara([makeRun('Bản đặc tả yêu cầu cần đạt', { bold: true })], { spacing: { before: 120, after: 60, line: 240 } }));
        target.push(makeSimpleTable(['TT', 'Chủ đề/Chương', 'Nội dung/Đơn vị kiến thức', ...levelsForSpec.map((level) => levelHeaders[level])], rows));
      };

      const exportCv7991ReviewMatrixSpecWord = async (reviewRequests, filenameBase) => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        const docChildren = [
          makePara([makeRun('MA TRẬN VÀ BẢNG ĐẶC TẢ ĐỀ CƯƠNG ÔN TẬP', { bold: true, size: 28 })], { alignment: d.AlignmentType.CENTER }),
          makePara(examTitle, { alignment: d.AlignmentType.CENTER }),
          makePara([makeRun('MA TRẬN', { bold: true })], { spacing: { before: 180, after: 0, line: 240 } }),
        ];
        docChildren.push(makeSimpleTable(
          ['STT', 'Chương', 'Bài/Nội dung', 'Dạng câu hỏi', 'Mức độ', 'Số câu'],
          selected.map((request, index) => [
            String(index + 1),
            request.item && request.item.chapter,
            request.item && request.item.unit,
            cv7991BankFormatLabel(request.format),
            cv7991LevelLabel(request.level),
            String(request.count),
          ])
        ));
        docChildren.push(makePara([makeRun('BẢNG ĐẶC TẢ', { bold: true })], { spacing: { before: 240, after: 0, line: 240 } }));
        docChildren.push(makeSimpleTable(
          ['STT', 'Chương', 'Bài/Nội dung', 'Mức độ', 'Yêu cầu cần đạt', 'Dạng câu hỏi', 'Số câu'],
          selected.map((request, index) => [
            String(index + 1),
            request.item && request.item.chapter,
            request.item && request.item.unit,
            cv7991LevelLabel(request.level),
            request.item && request.item.requirements && request.item.requirements[request.level],
            cv7991BankFormatLabel(request.format),
            String(request.count),
          ])
        ));
        const blob = await packCv7991Docx(makeExportDoc(docChildren));
        downloadCv7991File(`ma_tran_bang_dac_ta_${filenameBase}.docx`, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
      };
      const exportCv7991ReviewBankWord = async (reviewRequests, reviewQuestions, filenameBase) => {
        const selected = (Array.isArray(reviewRequests) ? reviewRequests : []).filter((request) => Number(request && request.count) > 0);
        const docChildren = [
          makePara([makeRun(cv7991ReviewBankDocTitle(), { bold: true, size: 28 })], { alignment: d.AlignmentType.CENTER }),
          makePara([makeRun(cv7991ReviewBankDocSubtitle(), { italics: true, size: 24 })], { alignment: d.AlignmentType.CENTER }),
        ];
        // Đã bỏ Bản đặc tả trong file Ngân hàng câu hỏi ôn tập theo yêu cầu.
        const byUnit = new Map();
        selected.forEach((request) => {
          const key = String(request.unitKey || cv7991UnitKey(request.item && request.item.unit));
          if (!byUnit.has(key)) byUnit.set(key, { item: request.item || {}, requests: [] });
          byUnit.get(key).requests.push(request);
        });
        let unitIndex = 1;
        byUnit.forEach((group) => {
          const item = group.item || {};
          const title = [item.chapter, item.unit].filter(Boolean).join(' - ');
          docChildren.push(makePara([makeRun(`${unitIndex}. ${title || 'Nội dung ôn tập'}`, { bold: true })], { spacing: { before: 220, after: 0, line: 240 } }));
          let questionNumber = 1;
          // Mẫu ngân hàng mới của MVIP:
          // I/II/III/IV theo loại câu; mức độ nằm ngay sau số câu: Câu 1 (NB), Câu 2 (TH)...
          CV7991_FORMATS.forEach((format) => {
            const formatRequests = group.requests.filter((request) => String(request && request.format || 'mc') === format);
            if (!formatRequests.length) return;

            const sectionEntries = [];
            CV7991_LEVELS.forEach((level) => {
              const request = formatRequests.find((entry) => entry.level === level);
              if (!request) return;
              const questionsForRequest = cv7991ReviewQuestionsForRequest(reviewQuestions, request);
              questionsForRequest.forEach((question) => sectionEntries.push({ question, level }));
            });
            if (!sectionEntries.length) return;

            docChildren.push(makePara(
              [makeRun(cv7991ReviewOutlineSectionLabel(format), { bold: true })],
              { spacing: { before: 160, after: 0, line: 240 } }
            ));

            sectionEntries.forEach(({ question, level }) => {
              const parsed = cv7991ParseQuestionForPrint(question, `${questionNumber} (${cv7991LevelCode(level)})`);
              appendReviewOutlineQuestion(docChildren, parsed, true);
              appendCv7991BankAnswer(docChildren, question.answer);
              appendCv7991BankGuide(docChildren, question);
              appendCv7991QuestionCompetency(docChildren, question);
              questionNumber += 1;
            });
          });
          unitIndex += 1;
        });
        const blob = await packCv7991Docx(makeExportDoc(docChildren));
        downloadCv7991File(`ngan_hang_cau_hoi_on_tap_${filenameBase}.docx`, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
      };
      const exportCv7991ReviewOutlineOnlyWord = async (reviewQuestions, filenameBase) => {
        const docChildren = [
          makePara([makeRun(cv7991ReviewOutlineDocTitle(), { bold: true, size: 30 })], { alignment: d.AlignmentType.CENTER }),
          makePara([makeRun(cv7991ReviewOutlineDocSubtitle(), { italics: true, size: 24 })], { alignment: d.AlignmentType.CENTER }),
        ];
        let qNo = 1;
        CV7991_FORMATS.forEach((format) => {
          const sectionQuestions = (Array.isArray(reviewQuestions) ? reviewQuestions : []).filter((question) => String(question && question.format || 'mc') === format);
          if (!sectionQuestions.length) return;
          docChildren.push(makePara([makeRun(cv7991ReviewOutlineSectionLabel(format), { bold: true })], { spacing: { before: 220, after: 0, line: 240 } }));
          sectionQuestions.forEach((question) => {
            appendReviewOutlineQuestion(docChildren, cv7991ParseQuestionForPrint(question, qNo));
            qNo += 1;
          });
        });
        const blob = await packCv7991Docx(makeExportDoc(docChildren));
        downloadCv7991File(`de_cuong_on_tap_${filenameBase}.docx`, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
      };
      const cv7991SanitizeExportTitle = (value, fallback = 'Đề kiểm tra theo CV7991') => {
        let title = String(value || '').replace(/\[\[CV7991_(?:IMG|TBL|OMML):[^\]]+\]\]/g, ' ')
          .replace(/\s+/g, ' ')
          .trim();
        // Nếu ô tên đề bị dính dữ liệu công thức MathType/ngân hàng đề thì không đưa vào header Word.
        if (!title || title.length > 160) title = fallback;
        return title;
      };
      const examTitle = cv7991SanitizeExportTitle(options.examTitle, 'Đề kiểm tra theo CV7991');
      const isReviewOutline = !!options.isReviewOutline;
      const cv7991DocxPageProperties = (landscape = false) => {
        const size = landscape ? { width: 16838, height: 11906 } : { width: 11906, height: 16838 };
        if (landscape && d.PageOrientation && d.PageOrientation.LANDSCAPE) size.orientation = d.PageOrientation.LANDSCAPE;
        return { page: { margin: { top: TWIP_CM_LOCAL, right: TWIP_CM_LOCAL, bottom: TWIP_CM_LOCAL, left: TWIP_CM_LOCAL }, size } };
      };
      const children = [];
      versions.forEach((version, versionIndex) => {
        if (versionIndex > 0) children.push(new d.Paragraph({ children: [new d.PageBreak()] }));
        if (isReviewOutline) {
          children.push(makePara([makeRun(cv7991ReviewOutlineDocTitle(), { bold: true, size: 30 })], { alignment: d.AlignmentType.CENTER }));
          children.push(makePara([makeRun(cv7991ReviewOutlineDocSubtitle(), { italics: true, size: 24 })], { alignment: d.AlignmentType.CENTER }));
        } else {
          makeCv7991ExamHeaderParagraphs(version).forEach((paragraph) => children.push(paragraph));
          children.push(makePara('', { spacing: { before: 0, after: 0, line: 240 } }));
        }
        let qNo = 1;
        let lastFormat = '';
        let lastOutlineUnit = '';
        let lastOutlineCell = '';
        const sectionNumberMap = cv7991BuildSectionNumberMap(version.questions || []);
        version.questions.forEach((question) => {
          const format = String(question && question.format || 'mc');
          if (isReviewOutline) {
            const unitLabel = String(question && question.unit || '').trim();
            if (unitLabel && unitLabel !== lastOutlineUnit) {
              children.push(makePara([makeRun(unitLabel, { bold: true })], { spacing: { before: 180, after: 0, line: 240 } }));
              lastOutlineUnit = unitLabel;
              lastOutlineCell = '';
            }
            const cellLabel = `${cv7991BankFormatLabel(format)} - ${cv7991LevelLabel(question && question.level)}`;
            if (cellLabel !== lastOutlineCell) {
              children.push(makePara([makeRun(cellLabel, { bold: true })]));
              lastOutlineCell = cellLabel;
            }
          } else if (format !== lastFormat) {
            children.push(makePara(makeCv7991SectionHeadingRuns(format, sectionNumberMap[format]), { spacing: { before: 180, after: 0, line: 240 } }));
            lastFormat = format;
          }
          const parsed = cv7991ParseQuestionForPrint(question, qNo);
          appendQuestion(children, parsed);
          qNo += 1;
        });
      });
      if (isReviewOutline) {
        const reviewVersion = (Array.isArray(versions) ? versions : []).find((version) => version && Array.isArray(version.questions)) || { questions: [] };
        const reviewQuestions = reviewVersion.questions || [];
        const reviewRequests = (Array.isArray(options.reviewRequests) && options.reviewRequests.length)
          ? options.reviewRequests
          : collectCv7991MatrixRequests();
        const reviewSubjectBase = cv7991SafeDocxNamePart(`mon ${cv7991ReviewSubjectLabel()}` || examTitle || 'de_cuong_on_tap_CV7991');
        const filenameBase = reviewSubjectBase;
        await exportCv7991ReviewOutlineOnlyWord(reviewQuestions, filenameBase);
        await new Promise((resolve) => setTimeout(resolve, 150));
        await exportCv7991ReviewBankWord(reviewRequests, reviewQuestions, filenameBase);
        return;
      }
      const examChildren = children.slice();
      if (options && options.suppressAnswerKey) {
        const doc = new d.Document({
          creator: 'MVIP',
          styles: { default: { document: { run: { font, size: 24 } } } },
          sections: [{ properties: cv7991DocxPageProperties(false), children: examChildren }],
        });
        const blob = await packCv7991Docx(doc);
        const outputName = `${cv7991SafeDocxFileName(examTitle, 'de_tron_MVIP')}.docx`;
        downloadCv7991File(outputName, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
        return;
      }
      const answerChildren = [];
      const postAnswerChildren = [];
      answerChildren.push(makePara([makeRun('ĐÁP ÁN', { bold: true, size: 28 })], { alignment: d.AlignmentType.CENTER, spacing: { before: 0, after: 0, line: 240 } }));
      const answerVersions = (Array.isArray(versions) ? versions : []).filter((version) => version && Array.isArray(version.questions));
      const codes = answerVersions.map((version) => cv7991DisplayExamCode(version.code));
      const scanRows = [];
      const baseQuestions = answerVersions[0] ? answerVersions[0].questions : [];
      baseQuestions.forEach((question, index) => {
        const number = index + 1;
        const format = String(question && question.format || 'mc');
        if (format === 'essay') return;
        if (format === 'tf') {
          ['a', 'b', 'c', 'd'].forEach((sub, subIndex) => scanRows.push({ number, sub, format, subIndex }));
        } else {
          scanRows.push({ number, sub: '', format, subIndex: 0 });
        }
      });
      const answerCodeCount = Math.max(codes.length, 1);
      const answerTotalCols = answerCodeCount + 2;
      const answerSize = answerTotalCols >= 38 ? 12 : answerTotalCols >= 30 ? 14 : answerTotalCols >= 24 ? 16 : answerTotalCols >= 18 ? 18 : answerTotalCols >= 12 ? 20 : 22;
      const answerLine = answerTotalCols >= 30 ? 170 : answerTotalCols >= 24 ? 180 : 200;
      const answerMarginY = answerTotalCols >= 30 ? 12 : 20;
      const answerMarginX = answerTotalCols >= 30 ? 12 : 20;
      const answerTableWidth = 16838 - TWIP_CM_LOCAL * 2;
      const qWidth = answerTotalCols >= 40 ? 360 : answerTotalCols >= 30 ? 420 : 520;
      const subWidth = answerTotalCols >= 40 ? 300 : answerTotalCols >= 30 ? 340 : 420;
      const codeWidth = Math.max(60, Math.floor((answerTableWidth - qWidth - subWidth) / answerCodeCount));
      const answerCellOpts = (extra = {}) => Object.assign({
        size: answerSize,
        line: answerLine,
        marginY: answerMarginY,
        marginX: answerMarginX,
        widthType: (d.WidthType && d.WidthType.DXA) || 'dxa',
        align: d.AlignmentType.CENTER,
        verticalAlign: (d.VerticalAlign && d.VerticalAlign.CENTER) || 'center',
        lineRule: (d.LineRuleType && d.LineRuleType.EXACT) || 'exact',
      }, extra || {});
      const answerRows = [
        new d.TableRow({
          children: [
            makeCell('', answerCellOpts({ width: qWidth })),
            makeCell('', answerCellOpts({ width: subWidth })),
            makeCell('mã đề', answerCellOpts({ columnSpan: answerCodeCount, width: codeWidth * answerCodeCount, bold: true })),
          ],
        }),
        new d.TableRow({
          children: [
            makeCell('Câu', answerCellOpts({ width: qWidth, bold: true })),
            makeCell('Ý', answerCellOpts({ width: subWidth, bold: true })),
            ...(codes.length ? codes.map((code) => makeCell(code, answerCellOpts({ width: codeWidth, bold: true }))) : [makeCell('01', answerCellOpts({ width: codeWidth, bold: true }))]),
          ],
        }),
      ];
      scanRows.forEach((row) => {
        answerRows.push(new d.TableRow({
          children: [
            makeCell(String(row.number), answerCellOpts({ width: qWidth })),
            makeCell(row.sub, answerCellOpts({ width: subWidth })),
            ...answerVersions.map((version) => {
              const question = version.questions[row.number - 1] || {};
              const answerState = cv7991StrictAnswerState(question, row.format, row.subIndex);
              return makeCell(
                answerState.missing ? '-' : answerState.value,
                answerCellOpts({
                  width: codeWidth,
                  color: '',
                  bold: false
                })
              );
            }),
          ],
        }));
      });
      answerChildren.push(makePara([makeRun('Trắc nghiệm', { bold: true })], { spacing: { before: 60, after: 0, line: 240 } }));
      const answerTableOptions = {
        width: { size: answerTableWidth, type: (d.WidthType && d.WidthType.DXA) || 'dxa' },
        borders: gridBorder,
        rows: answerRows,
      };
      if (d.TableLayoutType && d.TableLayoutType.FIXED) answerTableOptions.layout = d.TableLayoutType.FIXED;
      answerChildren.push(new d.Table(answerTableOptions));
      const appendCv7991EssayMarkingGuide = (target, answerText) => {
        const lines = String(answerText || 'Xem đáp án và thang điểm trong ngân hàng câu hỏi.')
          .replace(/\r/g, '')
          .split('\n')
          .map((line) => line.trim())
          .filter((line) => line && !/^Chấp nhận cách giải khác đúng bản chất toán học\.?$/i.test(line));
        if (!lines.length) {
          target.push(makePara('Xem đáp án và thang điểm trong ngân hàng câu hỏi.'));
          return;
        }
        lines.forEach((line) => {
          const tableId = tableTokenOnly(line);
          if (tableId && tableMap && tableMap[tableId]) {
            target.push(makeDataTable(tableMap[tableId]));
          } else {
            target.push(makePara(line, /^\[\[CV7991_(?:IMG|OMML):[^\]]+\]\]$/.test(line)
              ? { alignment: d.AlignmentType.CENTER, spacing: { before: 60, after: 60, line: 240 } }
              : undefined));
          }
        });
      };
      const cv7991EssayEntriesForVersion = (version) => (Array.isArray(version && version.questions) ? version.questions : [])
        .map((question, index) => ({ question, number: index + 1 }))
        .filter((entry) => entry.question && entry.question.format === 'essay');
      const appendCv7991EssayAnswerEntry = (target, entry) => {
        const parsedEssay = cv7991ParseQuestionForPrint(entry.question, entry.number);
        makeQuestionPara(entry.number, parsedEssay.prompt).forEach((paragraph) => target.push(paragraph));
        appendCv7991EssayMarkingGuide(target, entry.question.answer);
      };
      const hasEssay = answerVersions.some((version) => cv7991EssayEntriesForVersion(version).length);
      if (hasEssay) {
        postAnswerChildren.push(makePara([makeRun('Tự luận', { bold: true })], { spacing: { before: 240, after: 0, line: 240 } }));
        if (options.freezeEssay) {
          const sourceVersion = answerVersions.find((version) => !(version && version.isOriginalBase) && cv7991EssayEntriesForVersion(version).length)
            || answerVersions.find((version) => cv7991EssayEntriesForVersion(version).length);
          cv7991EssayEntriesForVersion(sourceVersion).forEach((entry) => appendCv7991EssayAnswerEntry(postAnswerChildren, entry));
        } else {
          answerVersions.forEach((version) => {
            const essayQuestions = cv7991EssayEntriesForVersion(version);
            if (!essayQuestions.length) return;
            postAnswerChildren.push(makePara([makeRun(`Mã ${cv7991DisplayExamCode(version.code)}`, { bold: true })]));
            essayQuestions.forEach((entry) => appendCv7991EssayAnswerEntry(postAnswerChildren, entry));
          });
        }
      }
      // Đã bỏ phần ma trận/bảng đặc tả ở cuối file Word.
      const docSections = [
        { properties: cv7991DocxPageProperties(false), children: examChildren },
        { properties: cv7991DocxPageProperties(true), children: answerChildren },
      ];
      if (postAnswerChildren.length) docSections.push({ properties: cv7991DocxPageProperties(!!options.singleExam), children: postAnswerChildren });
      const doc = new d.Document({
        creator: 'MVIP',
        styles: { default: { document: { run: { font, size: 24 } } } },
        sections: docSections,
      });
      const blob = await packCv7991Docx(doc);
      const outputName = `${cv7991SafeDocxFileName(examTitle, 'de_kiem_tra_CV7991')}.docx`;
      downloadCv7991File(outputName, blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
    }

    async function generateCv7991ReviewOutline(options = {}) {
      // Lớp bảo vệ thứ hai: khi sinh đề cương từ đúng mục Soạn đề cương,
      // luôn dùng ngân hàng MVIP để không phát sinh thông báo nhập Word.
      if (state.classManagerTab === 'outline') {
        selectCv7991BankSource('mvip');
      }
      const requests = collectCv7991MatrixRequests();
      if (!requests.length) {
        alert('Bạn nhập số lượng câu trong ma trận trước khi sinh đề cương ôn tập.');
        return;
      }
      if (state.classManagerTab === 'outline') {
        const totalQuestions = requests.reduce((sum, request) => sum + request.count, 0);
        const cellOverLimit = requests.some((request) => request.count > CV7991_MAX_PER_CELL);
        if (cellOverLimit || totalQuestions > CV7991_OUTLINE_MAX_QUESTIONS) {
          const message = cellOverLimit
            ? `Mỗi ô trong Soạn đề cương chỉ được chọn tối đa ${CV7991_MAX_PER_CELL} câu. Bạn vui lòng giảm số câu trong các ô vượt giới hạn.`
            : `Mỗi lần sinh đề cương chỉ được tối đa ${CV7991_OUTLINE_MAX_QUESTIONS} câu. Bạn đang chọn ${totalQuestions} câu; vui lòng giảm ít nhất ${totalQuestions - CV7991_OUTLINE_MAX_QUESTIONS} câu.`;
          state.cv7991PendingExport = null;
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Vượt giới hạn số câu đề cương');
          return;
        }
      }
      if (state.classManagerTab !== 'outline' && !validateCv7991ExamQuestionLimits(requests)) return;
      const loaded = await ensureCv7991SelectedQuestionBankReady(requests, { reason: 'generate-outline' });
      if (!loaded) return;
      const reviewDefaultTitle = cv7991ReviewOutlineTitle();
      const typedReviewTitle = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim();
      const examTitle = (options && options.forceReviewTitle) ? reviewDefaultTitle : (typedReviewTitle || reviewDefaultTitle);
      const generationSeed = `${examTitle}|de-cuong|${Date.now()}|${Math.random()}`;
      const questions = [];
      const missing = [];
      requests.forEach((request) => {
        const picked = pickCv7991Questions(loaded.bank, request, `${request.unitKey}|${request.format}|${request.level}|outline|${generationSeed}`, null);
        if (picked.length < request.count) {
          missing.push(`${request.item.unit} - ${cv7991BankFormatLabel(request.format)} - ${cv7991LevelLabel(request.level)}: thiếu ${request.count - picked.length} câu`);
        }
        picked.forEach((question) => {
          questions.push(Object.assign({}, question, {
            chapter: request.item.chapter,
            unit: request.item.unit,
            format: request.format,
            level: request.level,
          }));
        });
      });
      if (missing.length) {
        const msg = 'Chưa sinh được đề cương vì ngân hàng đề chưa đủ số câu đúng theo ma trận:\n- ' + missing.join('\n- ');
        setCv7991BankStatus(msg, 'err');
        openAlertModal(msg, 'Thiếu câu trong ngân hàng đề');
        return;
      }
      const version = {
        mon: '',
        code: 'ĐỀ CƯƠNG',
        studentId: '',
        studentName: '',
        classLabel: '',
        isReviewOutline: true,
        questions,
      };
      state.cv7991GeneratedVersions = [version];
      const reviewRequests = requests.map((request) => ({
        unitKey: request.unitKey,
        format: request.format,
        level: request.level,
        count: request.count,
        item: {
          index: request.item && request.item.index,
          chapter: request.item && request.item.chapter,
          unit: request.item && request.item.unit,
          requirements: Object.assign({}, request.item && request.item.requirements || {}),
        },
      }));
      state.cv7991PendingExport = { versions: [version], examTitle, classKeys: [], createdAt: Date.now(), isReviewOutline: true, reviewRequests, imageMap: loaded.images || {}, tableMap: loaded.tables || {}, equationMap: loaded.equations || {} };
      setCv7991BankStatus(`Đã sinh 01 đề cương ôn tập "${examTitle}" gồm ${questions.length} câu đúng theo ma trận đã chọn. Đang sẵn sàng xuất Word.`, 'ok');
      if (!(options && options.silentSuccess)) openAlertModal(`Sinh đề cương ôn tập "${examTitle}" thành công`, 'Sinh đề cương thành công');
    }

    async function generateCv7991SingleExam(singleOptions = {}) {
      const requests = collectCv7991MatrixRequests();
      if (!requests.length) {
        alert('Bạn nhập số lượng câu trong ma trận trước khi sinh đề.');
        return;
      }
      if (!validateCv7991ExamQuestionLimits(requests)) return;
      const loaded = await ensureCv7991SelectedQuestionBankReady(requests, { reason: 'generate-single' });
      if (!loaded) return;
      const examTitle = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim() || 'Đề kiểm tra theo CV7991';
      const generationSeed = `${examTitle}|single|${Date.now()}|${Math.random()}`;
      const questions = [];
      const missing = [];
      requests.forEach((request) => {
        const picked = pickCv7991Questions(loaded.bank, request, `${request.unitKey}|${request.format}|${request.level}|single|${generationSeed}`, null);
        if (picked.length < request.count) {
          missing.push(`${request.item.unit} - ${cv7991BankFormatLabel(request.format)} - ${cv7991LevelLabel(request.level)}: thiếu ${request.count - picked.length} câu`);
        }
        picked.forEach((question) => {
          questions.push(Object.assign({}, question, {
            chapter: request.item.chapter,
            unit: request.item.unit,
            format: request.format,
            level: request.level,
          }));
        });
      });
      if (missing.length) {
        const msg = 'Chưa sinh được đề vì ngân hàng đề chưa đủ số câu đúng theo ma trận:\n- ' + missing.join('\n- ');
        setCv7991BankStatus(msg, 'err');
        openAlertModal(msg, 'Thiếu câu trong ngân hàng đề');
        return;
      }
      const reviewRequests = requests.map((request) => ({
        unitKey: request.unitKey,
        format: request.format,
        level: request.level,
        count: request.count,
        item: {
          index: request.item && request.item.index,
          chapter: request.item && request.item.chapter,
          unit: request.item && request.item.unit,
          requirements: Object.assign({}, request.item && request.item.requirements || {}),
        },
      }));
      const sortOptions = {
        // Sinh 01 đề duy nhất: mặc định luôn ưu tiên sắp xếp câu hỏi theo mức độ từ dễ đến khó
        // (Biết -> Hiểu -> Vận dụng -> Vận dụng cao), kể cả khi caller không truyền tuỳ chọn.
        sortByLevel: !(singleOptions && singleOptions.sortByLevel === false),
        sortByUnit: !!(singleOptions && singleOptions.sortByUnit),
        showSpecQuestionNumbers: !!(singleOptions && singleOptions.showSpecQuestionNumbers),
      };
      const shuffled = cv7991ShuffleQuestionsWithinSections(questions, `${examTitle}|single|${generationSeed}`, sortOptions);
      const version = {
        mon: '',
        code: '01',
        studentId: '',
        studentName: '',
        classLabel: '',
        isSingleExam: true,
        questions: cv7991PrepareQuestionsForVersion(shuffled, `${examTitle}|single|${generationSeed}`),
      };
      state.cv7991GeneratedVersions = [version];
      state.cv7991PendingExport = { versions: [version], examTitle, classKeys: [], createdAt: Date.now(), singleExam: true, reviewRequests, sortByLevel: sortOptions.sortByLevel, sortByUnit: sortOptions.sortByUnit, showSpecQuestionNumbers: sortOptions.showSpecQuestionNumbers, imageMap: loaded.images || {}, tableMap: loaded.tables || {}, equationMap: loaded.equations || {} };
      const sortNote = [sortOptions.sortByLevel ? 'sắp xếp theo mức độ nhận thức' : '', sortOptions.sortByUnit ? 'sắp xếp theo bài' : '', sortOptions.showSpecQuestionNumbers ? 'bảng đặc tả hiện câu số' : ''].filter(Boolean).join(', ');
      setCv7991BankStatus(`Đã sinh 01 đề duy nhất "${examTitle}" gồm ${version.questions.length} câu${sortNote ? ` (${sortNote})` : ''}. Đang sẵn sàng xuất Word gồm đề, đáp án, ma trận và bảng đặc tả.`, 'ok');
      if (!(singleOptions && singleOptions.silentSuccess)) openAlertModal(`Sinh 01 đề duy nhất "${examTitle}" thành công`, 'Sinh đề thành công');
    }

    async function generateCv7991Exams(options = {}) {
      const requests = collectCv7991MatrixRequests();
      if (!requests.length) {
        alert('Bạn nhập số lượng câu trong ma trận trước khi sinh đề.');
        return;
      }
      if (!validateCv7991ExamQuestionLimits(requests)) return;
      const loaded = await ensureCv7991SelectedQuestionBankReady(requests, { reason: 'generate-exams' });
      if (!loaded) return;
      const selectedMons = selectedCv7991Mons();
      if (!selectedMons.length) {
        alert('Bạn tích chọn ít nhất 1 lớp-môn trước khi sinh đề.');
        return;
      }
      const emptyMons = selectedMons.filter((mon) => !sortedStudentKeysFromMap(classDataStudents(mon)).length);
      if (emptyMons.length) {
        alert(`Các lớp-môn sau chưa có danh sách học sinh: ${emptyMons.join(', ')}`);
        return;
      }
      const examTitle = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim();
      if (!examTitle) {
        alert('Bạn bấm "Đặt tên đề" và chọn/nhập tên đề kiểm tra trước khi sinh đề.');
        return;
      }
      const duplicateMons = selectedMons.filter((mon) => hasDuplicateExamConfigNameForEntry(ensureClassEntry(mon), examTitle));
      if (duplicateMons.length) {
        const classText = duplicateMons.length === 1 ? `lớp-môn ${duplicateMons[0]}` : `các lớp-môn: ${duplicateMons.join(', ')}`;
        const msg = `Tên đề "${examTitle}" đã có trong ${classText}. Bạn cần đặt tên khác trước khi sinh đề.`;
        openAlertModal(msg, 'Tên đề bị trùng');
        setCv7991BankStatus(msg, 'err');
        if (els.cv7991OpenExamTitleBtn) {
          els.cv7991OpenExamTitleBtn.focus({ preventScroll: true });
        }
        return;
      }
      const freezeEssay = !!(els.cv7991FreezeEssayCheckbox && els.cv7991FreezeEssayCheckbox.checked);
      const sameQuizShuffle = !!(els.cv7991SameQuizShuffleCheckbox && els.cv7991SameQuizShuffleCheckbox.checked);
      const codeMode = getCv7991GenerateExamCodeMode();
      const fixedCodeMode = codeMode.mode === 'fixed_count';
      const fixedCodeCount = Math.max(1, parseInt(String(codeMode.count || 1), 10) || 1);
      const versions = [];
      const studentVersions = [];
      const missing = [];
      const generationSeed = `${examTitle}|${Date.now()}|${Math.random()}`;
      const selectionContext = Object.create(null);
      const cloneQuestionList = (list) => (Array.isArray(list) ? list : []).map((question) => Object.assign({}, question));
      const buildQuestionsForCode = (classKey, studentId, makeOriginalBase) => {
        const questions = [];
        requests.forEach((request) => {
          const isEssayFixed = request.format === 'essay' && freezeEssay;
          const isSameQuizShuffle = sameQuizShuffle && request.format !== 'essay';
          const codeSeed = makeOriginalBase ? 'DE_GOC' : studentId;
          const seed = isEssayFixed
            ? `${request.unitKey}|${request.format}|${request.level}|fixed`
            : isSameQuizShuffle
              ? `${request.unitKey}|${request.format}|${request.level}|same-quiz|${examTitle}|${generationSeed}`
              : `${request.unitKey}|${request.format}|${request.level}|${classKey}|${codeSeed}|${generationSeed}`;
          const picked = pickCv7991Questions(
            loaded.bank,
            request,
            seed,
            isEssayFixed || isSameQuizShuffle || makeOriginalBase ? null : selectionContext
          );
          if (picked.length < request.count) missing.push(`${request.item.unit} - ${request.format}/${request.level}: thiếu ${request.count - picked.length}`);
          picked.forEach((question) => questions.push(Object.assign({}, question, { format: request.format, level: request.level, chapter: request.item.chapter, unit: request.item.unit })));
        });
        return questions;
      };
      selectedMons.forEach((classKey) => {
        const students = classDataStudents(classKey);
        const studentIds = sortedStudentKeysFromMap(students);
        if (sameQuizShuffle) {
          const originalQuestions = buildQuestionsForCode(classKey, 'DE_GOC', true);
          versions.push({
            mon: classKey,
            code: 'GỐC',
            studentId: '',
            studentName: 'ĐỀ GỐC',
            classLabel: cv7991ClassLabelFromKey(classKey),
            isOriginalBase: true,
            questions: cv7991SortQuestionsForPrint(cloneQuestionList(originalQuestions))
          });
        }
        if (fixedCodeMode) {
          const usedCodeCount = Math.min(fixedCodeCount, Math.max(1, studentIds.length));
          const codeVersionMap = Object.create(null);
          const representativeVersions = [];
          for (let codeIndex = 1; codeIndex <= usedCodeCount; codeIndex += 1) {
            const codeLabel = cv7991ExamCodeLabelByIndex(codeIndex);
            const questions = buildQuestionsForCode(classKey, codeLabel, false);
            const representative = {
              mon: classKey,
              code: codeLabel,
              studentId: '',
              studentName: `MÃ ĐỀ ${codeLabel}`,
              classLabel: cv7991ClassLabelFromKey(classKey),
              questions: cv7991PrepareQuestionsForVersion(
                cv7991ShuffleQuestionsWithinSections(
                  questions,
                  `${classKey}|${codeLabel}|${examTitle}|${generationSeed}`,
                  { fixedFormats: freezeEssay ? ['essay'] : [] }
                ),
                `${classKey}|${codeLabel}|${examTitle}`
              )
            };
            codeVersionMap[codeLabel] = representative;
            representativeVersions.push(representative);
          }
          cv7991DiversifyRepeatedMcOptions(representativeVersions);
          studentIds.forEach((studentId, studentIndex) => {
            const codeLabel = cv7991ExamCodeLabelByIndex((studentIndex % usedCodeCount) + 1);
            const baseVersion = codeVersionMap[codeLabel];
            const version = {
              mon: classKey,
              code: codeLabel,
              studentId,
              studentName: String(students[studentId] || '').trim(),
              classLabel: cv7991ClassLabelFromKey(classKey),
              questions: cloneCv7991QuestionsForReuse(baseVersion && baseVersion.questions)
            };
            versions.push(version);
            studentVersions.push(version);
          });
        } else {
          studentIds.forEach((studentId) => {
            const questions = buildQuestionsForCode(classKey, studentId, false);
            const version = {
              mon: classKey,
              code: studentId,
              studentId,
              studentName: String(students[studentId] || '').trim(),
              classLabel: cv7991ClassLabelFromKey(classKey),
              questions: cv7991PrepareQuestionsForVersion(
                cv7991ShuffleQuestionsWithinSections(
                  questions,
                  `${classKey}|${studentId}|${examTitle}|${generationSeed}`,
                  { fixedFormats: freezeEssay ? ['essay'] : [] }
                ),
                `${classKey}|${studentId}|${examTitle}`
              )
            };
            versions.push(version);
            studentVersions.push(version);
          });
        }
      });
      if (!fixedCodeMode) cv7991DiversifyRepeatedMcOptions(studentVersions);
      state.cv7991GeneratedVersions = versions;
      // Chụp lại đúng ma trận tại thời điểm Sinh đề để file Word luôn dùng
      // chính các Chương/Bài/ô đã chọn, kể cả sau đó người dùng có thay đổi giao diện.
      const reviewRequests = requests.map((request) => ({
        unitKey: request.unitKey,
        format: request.format,
        level: request.level,
        count: request.count,
        item: {
          index: request.item && request.item.index,
          chapter: request.item && request.item.chapter,
          unit: request.item && request.item.unit,
          requirements: Object.assign({}, request.item && request.item.requirements || {}),
        },
      }));
      state.cv7991PendingExport = { versions, examTitle, classKeys: selectedMons.slice(), createdAt: Date.now(), freezeEssay, sameQuizShuffle, codeMode: codeMode.mode, fixedCodeCount: fixedCodeMode ? fixedCodeCount : 0, reviewRequests, imageMap: loaded.images || {}, tableMap: loaded.tables || {}, equationMap: loaded.equations || {} };
      const saveResults = [];
      const saveErrors = [];
      const versionsForSave = versions.filter((version) => !(version && version.isOriginalBase));
      for (const classKey of selectedMons) {
        const classVersions = versionsForSave.filter((version) => version.mon === classKey);
        const scoringConfig = buildCv7991ScoringConfigForSave(classVersions);
        try {
          saveResults.push(await saveCv7991GeneratedExamConfig(classKey, examTitle, classVersions, scoringConfig));
        } catch (saveError) {
          let saveMessage = (saveError && saveError.message) ? saveError.message : String(saveError || 'Không rõ lỗi');
          if (/Failed to fetch|NetworkError|Load failed/i.test(saveMessage)) saveMessage = 'không kết nối được máy chủ để lưu cấu hình';
          saveErrors.push(`${classKey}: ${saveMessage}`);
          console.warn('Không đồng bộ được cấu hình chấm theo mã đề CV7991:', saveError);
        }
      }
      renderClassManagerSelect();
      renderExamConfigEditor(state.managerExamMons);
      renderCv7991DeleteExamOptions();
      renderAll();
      const total = versions.reduce((sum, version) => sum + version.questions.length, 0);
      const note = missing.length ? ` Có ${missing.length} ô chưa đủ câu, phần mềm đã lấy tối đa số câu hiện có.` : '';
      const baseNote = sameQuizShuffle ? ' Đề gốc chỉ dùng để xuất Word, cấu hình chấm chỉ lưu các mã đề của học sinh.' : '';
      const shuffleNote = sameQuizShuffle ? ' Đã bật chế độ: các câu trắc nghiệm giống nhau, đảo câu/đảo phương án theo mã đề.' : '';
      const codeModeNote = fixedCodeMode ? ` Đã chia học sinh luân phiên theo ${fixedCodeCount} mã đề.` : '';
      const firstSaved = saveResults.find((item) => item && item.saved);
      const saveNote = saveErrors.length
        ? ' Đề đã sinh xong để xuất Word. Cấu hình chấm theo mã đề đã được giữ trong phiên hiện tại nhưng chưa đồng bộ được lên máy chủ, bạn kiểm tra mạng/đăng nhập rồi bấm lại nếu cần lưu chắc chắn.'
        : firstSaved
          ? ` Đã lưu cấu hình chấm theo mã đề: ${firstSaved.questionCount} câu quét cho ${selectedMons.length} lớp-môn.`
          : ' Chưa lưu cấu hình chấm theo mã đề vì đề không có câu trắc nghiệm/trả lời ngắn để quét thẻ.';
      const versionSummary = sameQuizShuffle
        ? `Đã sinh ${versions.length} đề (${selectedMons.length} đề gốc + ${studentVersions.length} mã đề học sinh), tổng ${total} câu.`
        : `Đã sinh ${versions.length} đề có điền tên lớp, học sinh, tổng ${total} câu.`;
      const statusType = (missing.length || saveErrors.length) ? 'err' : 'ok';
      setCv7991BankStatus(`${versionSummary}${saveNote}${shuffleNote}${codeModeNote}${baseNote}${note} Đang sẵn sàng xuất Word.`, statusType);
      if (saveErrors.length) {
        openAlertModal(`Đã sinh đề "${examTitle}" xong. Bạn có thể xuất Word ngay trong cửa sổ Sinh đề.

Lưu ý: phần lưu cấu hình chấm theo mã đề lên máy chủ chưa thành công (${saveErrors[0]}).`, 'Sinh đề xong');
      } else {
        if (!(options && options.silentSuccess)) openAlertModal(`Sinh đề "${examTitle}" thành công`, 'Sinh đề thành công');
      }
    }

    async function exportCv7991PendingExam() {
      const pending = state.cv7991PendingExport;
      if (!pending || !Array.isArray(pending.versions) || !pending.versions.length) {
        openAlertModal('Bạn cần bấm Sinh đề thành công trước khi xuất đề.', 'Thông báo');
        return;
      }
      const exportTemplate = pending.isReviewOutline ? null : Object.assign({ mode: String(state.cv7991WordExportTemplate || 'form1') }, state.cv7991WordExportMeta || {});
      const exportExamTitle = String(exportTemplate && exportTemplate.examTitle || pending.examTitle || '').trim() || pending.examTitle;
      await exportCv7991GeneratedWord(pending.versions, { examTitle: exportExamTitle, isReviewOutline: !!pending.isReviewOutline, singleExam: !!pending.singleExam, reviewRequests: pending.reviewRequests || [], freezeEssay: !!pending.freezeEssay, sameQuizShuffle: !!pending.sameQuizShuffle, codeMode: pending.codeMode || '', fixedCodeCount: Number(pending.fixedCodeCount || 0), showSpecQuestionNumbers: !!pending.showSpecQuestionNumbers, sortByLevel: !!pending.sortByLevel, sortByUnit: !!pending.sortByUnit, imageMap: pending.imageMap || {}, tableMap: pending.tableMap || {}, equationMap: pending.equationMap || {}, wordTemplate: exportTemplate });
      setCv7991BankStatus(pending.isReviewOutline ? `Đã xuất file ZIP chứa 02 file Word cho đề cương ôn tập "${pending.examTitle}": đề cương ôn tập và ngân hàng câu hỏi ôn tập.` : (pending.singleExam ? `Đã xuất file Word cho 01 đề duy nhất "${pending.examTitle}" gồm đề, đáp án, ma trận và bảng đặc tả.` : `Đã xuất file Word cho đề "${pending.examTitle}".`), 'ok');
    }

    async function downloadCv7991TemplateWord() {
      const filename = 'Mau_ngan_hang_cau_hoi.docx';
      const templateUrl = `/downloads/${encodeURIComponent(filename)}?v=${Date.now()}`;
      try {
        setCv7991BankStatus('Đang tải mẫu Word mới nhất từ máy chủ...', '');
        const response = await fetch(templateUrl, {
          method: 'GET',
          cache: 'no-store',
          credentials: 'same-origin'
        });
        if (!response.ok) {
          throw new Error(`Máy chủ trả mã ${response.status}`);
        }

        // Tải nguyên bản file trên máy chủ, không chỉnh màu hoặc nội dung trong DOCX.
        const blob = await response.blob();
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        document.body.appendChild(a);
        a.click();
        a.remove();
        setTimeout(() => URL.revokeObjectURL(url), 1000);

        setCv7991BankStatus(`Đã tải file mẫu Word "${filename}" từ máy chủ.`, 'ok');
      } catch (error) {
        const message = error && error.message ? error.message : String(error || 'Lỗi không xác định');
        setCv7991BankStatus('Không tải được mẫu Word từ máy chủ.', 'err');
        openAlertModal(`Không tải được file /downloads/${filename}.\n\n${message}`, 'Lỗi tải mẫu Word');
      }
    }

    async function deleteSelectedCv7991ExamConfig() {
      try {
        const mons = selectedCv7991Mons();
        if (!mons.length) throw new Error('Bạn tích chọn ít nhất 1 lớp-môn trước khi xóa đề đã lưu.');
        const examNo = parseInt(String(els.cv7991DeleteExamSelect && els.cv7991DeleteExamSelect.value || 0), 10);
        if (Number.isNaN(examNo) || examNo < 1) throw new Error('Bạn chọn đề đã lưu chưa dùng trước khi xóa.');
        const invalidMons = mons.filter((mon) => !editableExamConfigsForMon(mon).some((cfg) => cfg.examNo === examNo));
        if (invalidMons.length) {
          throw new Error(`Các lớp-môn sau không còn đề chưa dùng để xóa theo lựa chọn hiện tại: ${invalidMons.join(', ')}.`);
        }
        const ok = await openConfirmAction(mons.length === 1
          ? `Bạn có chắc chắn xóa đề chưa dùng đang chọn của "${mons[0]}" không?`
          : `Bạn có chắc chắn xóa đề chưa dùng đang chọn của ${mons.length} lớp-môn đã chọn không?
${mons.join(', ')}`);
        if (!ok) return;
        mons.forEach((mon) => {
          const entry = ensureClassEntry(mon);
          const configs = syncExamConfigsForEntry(entry, entry.students).filter((cfg) => cfg.examNo !== examNo);
          entry.examConfigs = configs;
          entry.examConfig = configs.length ? configs[configs.length - 1] : emptyExamConfig();
          if (selectedExamNoForMon(mon) === examNo) setSelectedExamNoForMon(mon, entry.examConfig.examNo || 0);
        });
        await pushClassDataToServerAndRefresh(`Đã xóa đề đã lưu của ${mons.join(', ')}.`);
        renderCv7991ClassChecklist();
        renderCv7991DeleteExamOptions();
      } catch (error) {
        openAlertModal(error.message || 'Không thể xóa đề đã lưu.', 'Thông báo');
      }
    }

    function setClassManagerTab(tab, markSelection = true) {
      const next = tab === 'exam' ? 'exam' : (tab === 'outline' ? 'outline' : (tab === 'cv7991' ? 'cv7991' : 'roster'));
      state.classManagerTab = next;
      if (els.classManagerTabRosterBtn) els.classManagerTabRosterBtn.classList.toggle('active', markSelection && next === 'roster');
      if (els.classManagerTabExamBtn) els.classManagerTabExamBtn.classList.toggle('active', markSelection && next === 'exam');
      if (els.classManagerTabCv7991Btn) els.classManagerTabCv7991Btn.classList.toggle('active', markSelection && next === 'cv7991');
      if (els.classManagerTabOutlineBtn) els.classManagerTabOutlineBtn.classList.toggle('active', markSelection && next === 'outline');
      if (els.classManagerRosterPanel) els.classManagerRosterPanel.hidden = next !== 'roster';
      if (els.classManagerExamPanel) els.classManagerExamPanel.hidden = next !== 'exam';
      if (els.classManagerCv7991Panel) els.classManagerCv7991Panel.hidden = !(next === 'cv7991' || next === 'outline');
      if (next === 'cv7991' || next === 'outline') renderCv7991Gui();
    }

    function openExamConfigManagerTab() {
      state.managerExamEditNo = 0;
      setSelectedExamManagerMons([]);
      setClassManagerTab('exam');
    }

    function syncClassManagerSelects(mon) {
      const value = normMonKey(mon || '');
      if (els.classManagerSelect) els.classManagerSelect.value = value;
    }

    function selectedExamManagerMons() {
      const allKeys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const selected = Array.isArray(state.managerExamMons)
        ? state.managerExamMons.map(normMonKey).filter((key) => allKeys.includes(key))
        : [];
      state.managerExamMons = Array.from(new Set(selected));
      return state.managerExamMons;
    }

    function hasSelectedExamManagerMons() {
      return selectedExamManagerMons().length > 0;
    }

    function openNoExamMonSelectedAlert() {
      if (els.alertModal && !els.alertModal.hidden) return;
      openAlertModal('Bạn chưa chọn Lớp-Môn', 'Thông báo');
    }

    function guardExamConfigEditorInteraction(event) {
      if (hasSelectedExamManagerMons()) return false;
      if (event && typeof event.preventDefault === 'function') event.preventDefault();
      if (event && typeof event.stopPropagation === 'function') event.stopPropagation();
      openNoExamMonSelectedAlert();
      const target = event && event.target;
      if (target && typeof target.blur === 'function') {
        window.setTimeout(() => {
          try { target.blur(); } catch (_) {}
        }, 0);
      }
      return true;
    }

    function renderExamClassManagerChecklist() {
      if (!els.examClassManagerChecklist) return;
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const selected = new Set(selectedExamManagerMons());
      if (!keys.length) {
        els.examClassManagerChecklist.classList.add('empty');
        els.examClassManagerChecklist.innerHTML = '<div>Chưa có Lớp - Môn để chọn.</div>';
        return;
      }
      els.examClassManagerChecklist.classList.remove('empty');
      els.examClassManagerChecklist.innerHTML = keys.map((key) => `<label class="class-manager-check-item"><input type="checkbox" class="exam-class-manager-check" value="${escapeHtml(key)}" ${selected.has(key) ? 'checked' : ''}><span>${escapeHtml(key)}</span></label>`).join('');
    }

    function setSelectedExamManagerMons(mons, renderOnly = false) {
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean);
      const next = (Array.isArray(mons) ? mons : [mons]).map(normMonKey).filter((key) => keys.includes(key));
      state.managerExamMons = Array.from(new Set(next));
      const primaryKey = state.managerExamMons[0] || '';
      const editableNos = editableExamConfigsForMon(primaryKey).map((cfg) => parseInt(String(cfg.examNo || 0), 10));
      const currentEditNo = parseInt(String(state.managerExamEditNo || 0), 10);
      if (!editableNos.includes(currentEditNo)) state.managerExamEditNo = 0;
      renderExamClassManagerChecklist();
      if (!renderOnly) renderExamConfigEditor(state.managerExamMons);
    }

    function renderClassManagerRows(selectedMon = '') {
      if (!els.classManagerListRows) return;
      const selected = normMonKey(selectedMon || state.managerMon || '');
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      if (!keys.length) {
        els.classManagerListRows.innerHTML = '<div class="class-manager-empty">Chưa có lớp nào. Bấm <b>Thêm lớp</b> để tạo lớp đầu tiên.</div>';
        return;
      }
      els.classManagerListRows.innerHTML = keys.map((key) => {
        const count = Object.keys(classDataStudents(key) || {}).length;
        const droppedCount = Object.keys(classDataDroppedStudents(key)).length;
        const active = classSubjectKeysEquivalent(key, selected) ? ' active' : '';
        return `<div class="class-manager-row${active}" data-class-manager-row-key="${escapeHtml(key)}">
          <div class="class-manager-row-main">
            <div class="class-manager-row-title">${escapeHtml(key)}</div>
            <div class="class-manager-row-meta">${count} học sinh${droppedCount ? ` · ${droppedCount} bỏ học` : ''}</div>
          </div>
          <div class="class-manager-row-actions">
            <button class="nav-btn btn-outline" data-class-manager-action="edit" data-mon="${escapeHtml(key)}" type="button">Sửa</button>
            <button class="nav-btn btn-outline" data-class-manager-action="delete" data-mon="${escapeHtml(key)}" type="button">Xóa lớp</button>
          </div>
        </div>`;
      }).join('');
    }

    function refreshClassManagerEditors(mon, clearStatus = true) {
      const selected = normMonKey(mon || '');
      state.managerMon = selected;
      syncClassManagerSelects(selected);
      renderClassManagerRows(selected);
      state.managerExamMons = Array.isArray(state.managerExamMons)
        ? state.managerExamMons.map(normMonKey).filter(Boolean)
        : [];
      const primaryKey = (state.managerExamMons && state.managerExamMons[0]) || '';
      const editableNos = editableExamConfigsForMon(primaryKey).map((cfg) => parseInt(String(cfg.examNo || 0), 10));
      const currentEditNo = parseInt(String(state.managerExamEditNo || 0), 10);
      if (!editableNos.includes(currentEditNo)) state.managerExamEditNo = 0;
      if (els.rosterEditor) els.rosterEditor.value = selected ? rosterToText(classDataStudents(selected)) : '';
      renderExamClassManagerChecklist();
      renderExamConfigEditor(state.managerExamMons);
      if (els.deleteClassSubjectBtn) els.deleteClassSubjectBtn.disabled = !selected;
      if (els.saveRosterBtn) els.saveRosterBtn.disabled = !selected;
      if (els.clearRosterBtn) els.clearRosterBtn.disabled = !selected;
      if (clearStatus) classManagerStatus('');
    }

    function renderClassManagerSelect() {
      if (!els.classManagerSelect && !els.examClassManagerChecklist && !els.classManagerListRows) return;
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const options = keys.length
        ? keys.map((key) => `<option value="${escapeHtml(key)}">${escapeHtml(key)}</option>`).join('')
        : '<option value="">Chưa có Lớp-Môn</option>';
      if (els.classManagerSelect) els.classManagerSelect.innerHTML = options;
      const prefer = normMonKey(state.managerMon || state.currentMon || '');
      const selected = keys.includes(prefer) ? prefer : (keys[0] || '');
      state.managerExamMons = Array.isArray(state.managerExamMons)
        ? state.managerExamMons.map(normMonKey).filter((key) => keys.includes(key))
        : [];
      const primaryKey = state.managerExamMons[0] || '';
      const editableNos = editableExamConfigsForMon(primaryKey).map((cfg) => parseInt(String(cfg.examNo || 0), 10));
      const currentEditNo = parseInt(String(state.managerExamEditNo || 0), 10);
      if (!editableNos.includes(currentEditNo)) state.managerExamEditNo = 0;
      renderExamClassManagerChecklist();
      refreshClassManagerEditors(selected, false);
    }

    async function deleteClassSubjectFromManager(mon) {
      try {
        const key = normMonKey(mon || (els.classManagerSelect && els.classManagerSelect.value) || state.managerMon || '');
        if (!key) throw new Error('Bạn chọn lớp cần xóa.');
        const ok = await openConfirmAction(`Bạn có chắc chắn xóa lớp "${key}" không? Toàn bộ danh sách học sinh, cấu hình đề và kết quả quét của lớp này sẽ bị xóa sạch.`);
        if (!ok) return;
        removeClassSubjectEverywhere(key);
        await pushAllPersistentDataToServerAndRefresh(`Đã xóa sạch lớp và toàn bộ kết quả quét: ${key}`);
        renderClassManagerSelect();
        renderExamConfigEditor(state.managerExamMons);
      } catch (error) {
        classManagerStatus(error.message || 'Không thể xóa lớp.', 'err');
      }
    }

    async function refreshWebClassManagerAccess(showError = false) {
      if (!state.token) {
        state.webClassManagerEnabled = false;
        setAuthUi(false);
        return false;
      }
      try {
        // Gắn mốc thời gian để trình duyệt/Nginx không dùng lại trạng thái cũ.
        const resp = await apiGet(`/api/class-manager/web-access?_=${Date.now()}`);
        state.webClassManagerEnabled = !!(resp && resp.enabled);
        setAuthUi(true);
        return state.webClassManagerEnabled;
      } catch (error) {
        state.webClassManagerEnabled = false;
        setAuthUi(true);
        if (showError) {
          classManagerStatus(error.message || 'Không kiểm tra được quyền mở Quản lí.', 'err');
          openAlertModal(error.message || 'Không kiểm tra được quyền mở Quản lí.', 'Thông báo');
        }
        return false;
      }
    }

    function updateClassManagerStickyOffsets() {
      const dialog = document.querySelector('.class-manager-dialog');
      const head = document.querySelector('.class-manager-head');
      if (!dialog || !head) return;
      dialog.style.setProperty('--class-manager-head-height', `${Math.ceil(head.offsetHeight)}px`);
    }

    async function openClassManagerModal() {
      closeReportModal();
      if (!state.token) {
        guardLoginRequired();
        return;
      }
      const allowed = await refreshWebClassManagerAccess(true);
      if (!allowed) {
        openAlertModal('Điện thoại của tài khoản này đang tắt quyền mở "Quản lí" trên web. Bạn mở app trên điện thoại, vào Cài đặt rồi bật công tắc cho phép.', 'Thông báo');
        return;
      }
      state.managerMon = normMonKey(state.currentMon || '');
      renderClassManagerSelect();
      setClassManagerTab('roster', false);
      classManagerStatus('Điện thoại đã cho phép chỉnh sửa dữ liệu lớp trên web.', 'ok');
      if (els.newClassSubjectInput) els.newClassSubjectInput.value = '';
      els.classManagerModal.hidden = false;
      updateClassManagerStickyOffsets();
    }

    function closeClassManagerModal() {
      if (els.classManagerModal) els.classManagerModal.hidden = true;
      classManagerStatus('');
    }

    let confirmActionResolver = null;

    function closeConfirmAction(result) {
      if (els.confirmActionModal) els.confirmActionModal.hidden = true;
      const resolver = confirmActionResolver;
      confirmActionResolver = null;
      if (typeof resolver === 'function') resolver(Boolean(result));
    }

    function openConfirmAction(message) {
      return new Promise((resolve) => {
        if (!els.confirmActionModal || !els.confirmActionMessage || !els.confirmActionOkBtn || !els.confirmActionCancelBtn) {
          resolve(window.confirm(message));
          return;
        }
        confirmActionResolver = resolve;
        els.confirmActionMessage.textContent = message;
        els.confirmActionModal.hidden = false;
      });
    }

    let alertModalOkAction = null;
    let alertModalHome = null;
    let alertModalReturnFocus = null;

    function syncAlertModalHost() {
      const modal = els.alertModal;
      if (!modal) return;
      const host = !modal.hidden ? currentAccessFullscreenHost() : null;
      if (host && modal.parentNode !== host) {
        if (!alertModalHome) alertModalHome = { parent: modal.parentNode, next: modal.nextSibling };
        host.appendChild(modal);
      } else if (!host && alertModalHome) {
        const home = alertModalHome;
        const parent = home.parent && home.parent.isConnected ? home.parent : document.body;
        const next = home.next && home.next.parentNode === parent ? home.next : null;
        parent.insertBefore(modal, next);
        alertModalHome = null;
      }
    }

    document.addEventListener('fullscreenchange', syncAlertModalHost);
    document.addEventListener('webkitfullscreenchange', syncAlertModalHost);

    function closeAlertModal(runOkAction = false) {
      if (els.alertModal) {
        els.alertModal.hidden = true;
        els.alertModal.classList.remove('is-legacy-file-warning', 'is-manager-permission-warning');
      }
      syncAlertModalHost();
      const returnFocus = alertModalReturnFocus;
      alertModalReturnFocus = null;
      if (returnFocus && returnFocus.isConnected && typeof returnFocus.focus === 'function') {
        try { returnFocus.focus({ preventScroll: true }); } catch (_) {}
      }
      const action = alertModalOkAction;
      alertModalOkAction = null;
      if (runOkAction && typeof action === 'function') {
        setTimeout(() => {
          try { action(); } catch (_) {}
        }, 0);
      }
    }

    function openAlertModal(message, title = 'Thông báo', options = null) {
      alertModalOkAction = options && typeof options.onOk === 'function' ? options.onOk : null;
      if (!els.alertModal || !els.alertModalMessage || !els.alertModalTitle) {
        window.alert(message || '');
        const action = alertModalOkAction;
        alertModalOkAction = null;
        if (typeof action === 'function') action();
        return;
      }
      if (els.alertModal.hidden) alertModalReturnFocus = document.activeElement;
      els.alertModalTitle.textContent = title || 'Thông báo';
      els.alertModalMessage.textContent = message || '';
      const alertMessageText = String(message || '').trim();
      els.alertModal.classList.toggle(
        'is-legacy-file-warning',
        /^File\s+\.(?:doc|ppt)\s+là\s+định\s+dạng/i.test(alertMessageText)
      );
      els.alertModal.classList.toggle(
        'is-manager-permission-warning',
        /^Điện thoại của tài khoản này đang tắt quyền mở ["“]Quản lí["”] trên web\./i.test(alertMessageText)
      );
      els.alertModal.hidden = false;
      syncAlertModalHost();
      requestAnimationFrame(() => {
        if (!els.alertModal.hidden) {
          try { els.alertModalOkBtn?.focus({ preventScroll: true }); } catch (_) {}
        }
      });
    }

    function closeCv7991ReviewExportDialog() {
      if (els.cv7991ReviewExportModal) els.cv7991ReviewExportModal.hidden = true;
    }

    function openCv7991ReviewExportDialog() {
      if (!els.cv7991ReviewExportModal) return;
      const outlineTitle = cv7991ReviewOutlineTitle();
      const bankTitle = cv7991ReviewBankTitle();
      if (els.cv7991ReviewExportMessage) {
        els.cv7991ReviewExportMessage.textContent = 'Mvip sinh ra 2 file Word trong 01 thư mục và nén thư mục đó thành file ZIP:';
      }
      if (els.cv7991ReviewExportFiles) {
        els.cv7991ReviewExportFiles.innerHTML = `
          <div>1. "${escapeHtml(outlineTitle)}"</div>
          <div>2. "${escapeHtml(bankTitle)}"</div>`;
      }
      els.cv7991ReviewExportModal.hidden = false;
      setTimeout(() => {
        if (els.cv7991ReviewExportOkBtn) els.cv7991ReviewExportOkBtn.focus({ preventScroll: true });
      }, 0);
    }

    async function confirmCv7991ReviewExportDialog() {
      const button = els.cv7991ReviewExportOkBtn;
      const oldText = button ? button.textContent : '';
      try {
        if (button) {
          button.disabled = true;
          button.textContent = 'Đang tải...';
        }
        await exportCv7991PendingExam();
        closeCv7991ReviewExportDialog();
      } catch (error) {
        const message = error.message || 'Không thể tải file đề cương ôn tập.';
        setCv7991BankStatus(message, 'err');
        openAlertModal(message, 'Thông báo');
      } finally {
        if (button) {
          button.disabled = false;
          button.textContent = oldText || 'Xuất đề';
        }
      }
    }

    const CV7991_WORD_TEMPLATE_PREVIEW_IMAGES = {
      form1: 'data:image/png;base64,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',
      form2: 'data:image/png;base64,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',
      form3: 'data:image/png;base64,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',
    };

    function closeCv7991WordTemplatePreview() {
      if (els.cv7991WordTemplatePreviewModal) els.cv7991WordTemplatePreviewModal.hidden = true;
    }

    function openCv7991WordTemplatePreview(mode = 'form1') {
      const raw = cv7991NormalizeWordTemplateMode(mode);
      const base = cv7991WordTemplateBaseMode(raw);
      const key = base === 'form2' ? 'form2' : (base === 'form3' ? 'form3' : 'form1');
      const label = `Mẫu ${raw.replace('form','Form ')}`;
      if (els.cv7991WordTemplatePreviewTitle) els.cv7991WordTemplatePreviewTitle.textContent = label;
      if (els.cv7991WordTemplatePreviewImage) {
        els.cv7991WordTemplatePreviewImage.src = CV7991_WORD_TEMPLATE_PREVIEW_IMAGES[key] || '';
        els.cv7991WordTemplatePreviewImage.alt = label;
      }
      if (els.cv7991WordTemplatePreviewModal) els.cv7991WordTemplatePreviewModal.hidden = false;
      requestAnimationFrame(() => {
        try { els.cv7991WordTemplatePreviewCloseBtn?.focus({ preventScroll: true }); } catch (_) {}
      });
    }

    let cv7991WordTemplateConfirmRunner = null;

    function closeCv7991WordTemplateDialog(restoreSourceDialog = true) {
      closeCv7991WordTemplatePreview();
      if (els.cv7991WordTemplateModal) els.cv7991WordTemplateModal.hidden = true;
      const pendingAction = String(state.cv7991WordTemplatePendingAction || '');
      state.cv7991WordTemplatePendingAction = '';
      cv7991WordTemplateConfirmRunner = null;
      /* Khi người dùng đóng bảng chọn form bằng X/nền tối thì quay lại bảng trước.
         Khi bấm OK thì KHÔNG hiện lại bảng “Lựa chọn cách sinh đề”; hệ thống sinh và xuất Word ngay. */
      if (restoreSourceDialog) {
        if (pendingAction === 'generate_multi' && els.cv7991GenerateExamModal) {
          els.cv7991GenerateExamModal.hidden = false;
        } else if (pendingAction === 'generate_single' && els.cv7991SingleExamOptionsModal) {
          els.cv7991SingleExamOptionsModal.hidden = false;
        }
      }
    }


    function cv7991WordTemplateSelectedFormatsFromMatrix() {
      const formats=['mc','tf','short','essay'];
      const selected=[];
      if (els.cv7991MatrixTable) {
        formats.forEach((format)=>{
          let total=0;
          els.cv7991MatrixTable.querySelectorAll(`.cv7991-matrix-input[data-format="${format}"]`).forEach((input)=>{
            total += Math.max(0, Math.floor(Number(String(input.value || '0').replace(',', '.')) || 0));
          });
          if (total > 0) selected.push(format);
        });
      }

      if (!selected.length) {
        const version=cv7991WordTemplatePreviewVersion();
        const qs=version && Array.isArray(version.questions) ? version.questions : [];
        qs.forEach((q)=>{
          const format=String(q && q.format || 'mc');
          if (formats.includes(format) && !selected.includes(format)) selected.push(format);
        });
      }
      return selected.length ? selected : ['mc'];
    }

    function cv7991WordTemplateHasEssayInMatrix() {
      return cv7991WordTemplateSelectedFormatsFromMatrix().includes('essay');
    }

    function cv7991WordTemplatePreviewClean(value, fallback = '') {
      const text = String(value == null ? '' : value)
        .replace(/\[\[CV7991_(?:IMG|TBL|OMML):[^\]]+\]\]/g, ' [hình/công thức] ')
        .replace(/\s+/g, ' ')
        .trim();
      return text || fallback;
    }

    function cv7991WordTemplatePreviewVersion() {
      const pending = state.cv7991PendingExport;
      if (pending && Array.isArray(pending.versions) && pending.versions.length) return pending.versions[0];
      if (Array.isArray(state.cv7991GeneratedVersions) && state.cv7991GeneratedVersions.length) return state.cv7991GeneratedVersions[0];
      return null;
    }

    function cv7991WordTemplatePreviewSubject(version) {
      let mon = String(version && version.mon || '').trim();
      if (!mon) {
        try {
          const selected = typeof selectedCv7991Mons === 'function' ? selectedCv7991Mons() : [];
          mon = String((selected && selected[0]) || state.currentMon || state.managerMon || '').trim();
        } catch (_) {
          mon = String(state.currentMon || state.managerMon || '').trim();
        }
      }
      try {
        const parsed = typeof parseClassSubjectNameForDialog === 'function'
          ? parseClassSubjectNameForDialog(mon)
          : null;
        const subject = String(parsed && parsed.subject || '').trim();
        const grade = String(parsed && parsed.grade || '').trim();
        return [subject, grade].filter(Boolean).join(' ') || mon || '[MÔN LỚP]';
      } catch (_) {
        return mon || '[MÔN LỚP]';
      }
    }

    function cv7991WordTemplatePreviewCode(version) {
      const raw = String(version && version.code || '01').trim() || '01';
      try {
        return typeof displayExamCode === 'function' ? displayExamCode(raw) : raw;
      } catch (_) {
        return raw;
      }
    }

    function cv7991WordTemplatePreviewStudent(version) {
      const singleMode = !!(
        (version && version.isSingleExam)
        || (state.cv7991PendingExport && state.cv7991PendingExport.singleExam)
        || (els.cv7991GenerateModeSingleRadio && els.cv7991GenerateModeSingleRadio.checked)
      );
      if (singleMode) {
        return {
          name: '..............',
          classLabel: '.......',
        };
      }
      const auto = !!String(version && version.studentId || '').trim();
      return {
        name: auto ? String(version && version.studentName || '').trim() : '',
        classLabel: auto ? String(version && version.classLabel || '').trim() : '',
      };
    }


    function cv7991NormalizeWordTemplateMode(value) {
      const mode=String(value||'form1').toLowerCase();
      return ['form1','form2','form3','form4','form5'].includes(mode) ? mode : 'form1';
    }
    function cv7991WordTemplateBaseMode(value) {
      const mode=cv7991NormalizeWordTemplateMode(value);
      if(mode==='form4')return 'form2';
      if(mode==='form5')return 'form3';
      return mode;
    }
    function cv7991WordTemplateIsDirect(value) {
      return ['form1','form2','form3'].includes(cv7991NormalizeWordTemplateMode(value));
    }
    function cv7991WordTemplateEssayLineCountValue(value) {
      const n=Math.floor(Number(value));
      return Math.max(1,Math.min(100,Number.isFinite(n)?n:3));
    }

    function cv7991WordTemplatePreviewHeader(settings, version) {
      const mode = cv7991NormalizeWordTemplateMode(settings.mode);
      const baseMode = cv7991WordTemplateBaseMode(mode);
      const title = cv7991WordTemplatePreviewClean(settings.examTitle, 'ĐỀ KIỂM TRA');
      const district = cv7991WordTemplatePreviewClean(settings.district, '[TÊN XÃ (SỞ)]');
      const school = cv7991WordTemplatePreviewClean(settings.school, '[TÊN TRƯỜNG]');
      const year = cv7991WordTemplatePreviewClean(settings.schoolYear, '[NĂM HỌC]');
      const duration = cv7991WordTemplatePreviewClean(settings.duration, '[Thời gian làm bài]');
      const subject = cv7991WordTemplatePreviewSubject(version);
      const code = cv7991WordTemplatePreviewCode(version);
      const student = cv7991WordTemplatePreviewStudent(version);
      const nameText = student.name || '';
      const classText = student.classLabel || '';

      if (baseMode === 'form2') {
        return `
          <div class="cv7991-live-simple-head">
            <div class="cv7991-live-italic">${escapeHtml(title)}</div>
            <div class="cv7991-live-bold">MÃ ĐỀ ${escapeHtml(code)}</div>
          </div>
          <div class="cv7991-live-simple-info">
            <div>Họ và tên: <b>${escapeHtml(nameText)}</b></div>
            <div>Lớp: ${escapeHtml(classText)}</div>
          </div>`;
      }

      const top = `
        <div class="cv7991-live-top">
          <div class="cv7991-live-center">
            <div class="cv7991-live-bold">${escapeHtml(district)}</div>
            <div>${escapeHtml(school)}</div>
          </div>
          <div class="cv7991-live-center">
            <div class="${baseMode === 'form1' ? 'cv7991-live-bold' : ''}">${escapeHtml(title)}</div>
            <div class="cv7991-live-bold">MÔN: ${escapeHtml(subject)}</div>
            <div class="cv7991-live-bold">NĂM HỌC: ${escapeHtml(year)}</div>
            <div class="cv7991-live-time">Thời gian làm bài: ${escapeHtml(duration)} phút, không kể thời gian giao đề</div>
          </div>
        </div>`;

      if (baseMode === 'form3') {
        return top + `
          <div class="cv7991-live-form3-info">
            <div>Họ và tên: ${escapeHtml(nameText)}</div>
            <div>Lớp: ${escapeHtml(classText)}</div>
            <div class="cv7991-live-bold" style="text-align:right">MÃ ĐỀ ${escapeHtml(code)}</div>
          </div>`;
      }

      return top + `
        <table class="cv7991-live-table">
          <colgroup><col style="width:51.4%"><col style="width:14.4%"><col style="width:34.2%"></colgroup>
          <tr><td>Họ và tên học sinh: ${escapeHtml(nameText)}</td><td>Lớp: ${escapeHtml(classText)}</td><td>Số báo danh:</td></tr>
          <tr><td>Giám thị 1:</td><td colspan="2">Giám thị 2:</td></tr>
          <tr><td class="cv7991-live-bold">MÃ ĐỀ ${escapeHtml(code)}</td><td colspan="2">SỐ PHÁCH:</td></tr>
        </table>
        <div class="cv7991-live-cut"></div>
        <table class="cv7991-live-table">
          <tr><td style="width:51.4%" class="cv7991-live-bold">MÃ ĐỀ ${escapeHtml(code)}</td><td class="cv7991-live-bold">SỐ PHÁCH:</td></tr>
        </table>
        <table class="cv7991-live-table">
          <tr>
            <th colspan="2">Điểm</th>
            <th>Người chấm thứ nhất</th>
            <th>Người chấm thứ hai</th>
          </tr>
          <tr class="cv7991-live-score-empty">
            <td style="width:14.6%">Bằng số</td>
            <td style="width:20.3%;text-align:center">Bằng chữ</td>
            <td></td><td></td>
          </tr>
        </table>`;
    }

    function cv7991WordTemplatePreviewQuestionHtml(question, number, directMode = true) {
      let parsed;
      try {
        parsed = cv7991ParseQuestionForPrint(question || {}, number);
      } catch (_) {
        parsed = {
          displayNumber: number,
          format: String(question && question.format || 'mc'),
          prompt: cv7991WordTemplatePreviewClean(question && question.text || '', 'Nội dung câu hỏi'),
          options: [],
          statements: [],
          optionLayoutColumns: 0
        };
      }
      const format = String(parsed.format || 'mc');
      const prompt = cv7991WordTemplatePreviewClean(parsed.prompt, 'Nội dung câu hỏi');
      let extra = '';

      if (format === 'mc') {
        const options = Array.isArray(parsed.options) ? parsed.options.slice(0, 4) : [];
        if (options.length) {
          const cols = parsed.optionLayoutColumns === 4 ? 'cols4'
            : (parsed.optionLayoutColumns === 2 ? 'cols2' : 'cols1');
          extra = `<div class="cv7991-live-options ${cols}">${options.map((opt) => (
            `<div><b>${escapeHtml(String(opt.letter || ''))}.</b> ${escapeHtml(cv7991WordTemplatePreviewClean(opt.text))}</div>`
          )).join('')}</div>`;
        }
      } else if (format === 'tf') {
        const items = Array.isArray(parsed.statements) ? parsed.statements.slice(0, 4) : [];
        if (items.length) {
          if (directMode) {
            extra = `<table class="cv7991-live-tf"><tr><th>Nội dung</th><th style="width:72px">Đ/S</th></tr>${
              items.map((item) => `<tr><td><b>${escapeHtml(String(item.letter || ''))})</b> ${escapeHtml(cv7991WordTemplatePreviewClean(item.text))}</td><td></td></tr>`).join('')
            }</table>`;
          } else {
            extra = `<div class="cv7991-live-tf-plain">${items.map((item) => `<p><b>${escapeHtml(String(item.letter || ''))})</b> ${escapeHtml(cv7991WordTemplatePreviewClean(item.text))}</p>`).join('')}</div>`;
          }
        }
      } else if (format === 'short') {
        extra = directMode ? '<div style="margin-left:18px">Trả lời: ............................................................</div>' : '';
      }

      return `<div class="cv7991-live-question"><div class="cv7991-live-qprompt"><b>Câu ${number}.</b> ${escapeHtml(prompt)}</div>${extra}</div>`;
    }


    function cv7991WordTemplatePreviewEssayWork(settings, questions, selectedFormats = null) {
      if (!cv7991WordTemplateIsDirect(settings && settings.mode)) return '';
      const formats=Array.isArray(selectedFormats) ? selectedFormats : cv7991WordTemplateSelectedFormatsFromMatrix();
      const hasEssay=formats.includes('essay') || (Array.isArray(questions) && questions.some((q) => String(q && q.format || '') === 'essay'));
      if (!hasEssay) return '';
      const count=cv7991WordTemplateEssayLineCountValue(settings && settings.essayLineCount);
      return `<div class="cv7991-live-essay-work"><div class="cv7991-live-essay-title">BÀI LÀM PHẦN TỰ LUẬN</div>${Array.from({length:count},()=>'<div class="cv7991-live-essay-line"></div>').join('')}</div>`;
    }

    function renderCv7991WordTemplateLivePreview() {
      if (!els.cv7991WordTemplateLivePreview) return;
      const settings = currentCv7991WordTemplateSettings();
      const version = cv7991WordTemplatePreviewVersion();
      const normalizedMode=cv7991NormalizeWordTemplateMode(settings.mode);
      const directMode=cv7991WordTemplateIsDirect(normalizedMode);
      if (els.cv7991WordTemplateLivePreviewLabel) {
        els.cv7991WordTemplateLivePreviewLabel.textContent = normalizedMode.replace('form','Form ');
      }

      const selectedFormats=cv7991WordTemplateSelectedFormatsFromMatrix();
      const questions = version && Array.isArray(version.questions) ? version.questions : [];
      const filteredQuestions=questions.filter((q)=>selectedFormats.includes(String(q && q.format || 'mc')));
      let body = '';
      const sectionLabels = {
        mc:'I. TRẮC NGHIỆM NHIỀU LỰA CHỌN',
        tf:'II. TRẮC NGHIỆM ĐÚNG - SAI',
        short:'III. TRẢ LỜI NGẮN',
        essay:'IV. TỰ LUẬN'
      };

      if (filteredQuestions.length) {
        let lastFormat = '';
        filteredQuestions.forEach((question, index) => {
          const format = String(question && question.format || 'mc');
          if (format !== lastFormat) {
            body += `<div class="cv7991-live-section">${escapeHtml(sectionLabels[format] || '')}</div>`;
            lastFormat = format;
          }
          body += cv7991WordTemplatePreviewQuestionHtml(question, index + 1, directMode);
        });
      } else {
        let sampleNo=1;
        selectedFormats.forEach((format)=>{
          body += `<div class="cv7991-live-section">${escapeHtml(sectionLabels[format] || '')}</div>`;
          if(format==='mc'){
            body += `<div class="cv7991-live-question"><div class="cv7991-live-qprompt"><b>Câu ${sampleNo++}.</b> <span class="cv7991-live-placeholder">Nội dung câu hỏi nhiều lựa chọn sẽ hiển thị tại đây sau khi sinh đề.</span></div>
              <div class="cv7991-live-options cols4"><div><b>A.</b> Phương án A</div><div><b>B.</b> Phương án B</div><div><b>C.</b> Phương án C</div><div><b>D.</b> Phương án D</div></div></div>`;
          }else if(format==='tf'){
            const tfItems=[
              {letter:'a',text:'Nội dung ý a'},
              {letter:'b',text:'Nội dung ý b'},
              {letter:'c',text:'Nội dung ý c'},
              {letter:'d',text:'Nội dung ý d'}
            ];
            const fake={format:'tf',prompt:'Nội dung câu hỏi đúng - sai.',statements:tfItems};
            body += cv7991WordTemplatePreviewQuestionHtml(fake,sampleNo++,directMode);
          }else if(format==='short'){
            const fake={format:'short',prompt:'Nội dung câu trả lời ngắn.'};
            body += cv7991WordTemplatePreviewQuestionHtml(fake,sampleNo++,directMode);
          }else if(format==='essay'){
            body += `<div class="cv7991-live-question"><div class="cv7991-live-qprompt"><b>Câu ${sampleNo++}.</b> <span class="cv7991-live-placeholder">Nội dung câu tự luận sẽ hiển thị tại đây sau khi sinh đề.</span></div></div>`;
          }
        });
      }

      els.cv7991WordTemplateLivePreview.innerHTML =
        cv7991WordTemplatePreviewHeader(settings, version) + body + cv7991WordTemplatePreviewEssayWork(settings, filteredQuestions, selectedFormats);
    }

    function syncCv7991WordTemplateDialog() {
      const mode = cv7991NormalizeWordTemplateMode(state.cv7991WordExportTemplate || 'form1');
      const baseMode=cv7991WordTemplateBaseMode(mode);
      if (els.cv7991WordTemplateForm1Radio) els.cv7991WordTemplateForm1Radio.checked = mode === 'form1';
      if (els.cv7991WordTemplateForm2Radio) els.cv7991WordTemplateForm2Radio.checked = mode === 'form2';
      if (els.cv7991WordTemplateForm3Radio) els.cv7991WordTemplateForm3Radio.checked = mode === 'form3';
      if (els.cv7991WordTemplateForm4Radio) els.cv7991WordTemplateForm4Radio.checked = mode === 'form4';
      if (els.cv7991WordTemplateForm5Radio) els.cv7991WordTemplateForm5Radio.checked = mode === 'form5';
      if (els.cv7991WordTemplateForm1Options) els.cv7991WordTemplateForm1Options.hidden = false;
      if (els.cv7991WordTemplateEssayLinesWrap) {
        els.cv7991WordTemplateEssayLinesWrap.hidden = !(cv7991WordTemplateIsDirect(mode) && cv7991WordTemplateHasEssayInMatrix());
      }
      renderCv7991WordTemplateLivePreview();
    }

    function currentCv7991WordTemplateExamTitle() {
      const pendingTitle = String(state.cv7991PendingExport && state.cv7991PendingExport.examTitle || '').trim();
      const inputTitle = String(els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value || '').trim();
      return pendingTitle || inputTitle || 'Đề kiểm tra';
    }

    function currentCv7991WordTemplateSettings() {
      const stored = state.cv7991WordExportMeta && typeof state.cv7991WordExportMeta === 'object' ? state.cv7991WordExportMeta : {};
      return {
        mode: cv7991NormalizeWordTemplateMode(state.cv7991WordExportTemplate || 'form1'),
        examTitle: currentCv7991WordTemplateExamTitle(),
        district: String((els.cv7991WordTemplateDistrictInput && els.cv7991WordTemplateDistrictInput.value) || stored.district || '').trim(),
        school: String((els.cv7991WordTemplateSchoolInput && els.cv7991WordTemplateSchoolInput.value) || stored.school || '').trim(),
        schoolYear: String((els.cv7991WordTemplateSchoolYearInput && els.cv7991WordTemplateSchoolYearInput.value) || stored.schoolYear || '').trim(),
        duration: String((els.cv7991WordTemplateDurationInput && els.cv7991WordTemplateDurationInput.value) || stored.duration || '').trim(),
        essayLineCount: cv7991WordTemplateEssayLineCountValue((els.cv7991WordTemplateEssayLineCountInput && els.cv7991WordTemplateEssayLineCountInput.value) || stored.essayLineCount || 3),
        evenPagesPerCode: !!(els.cv7991WordTemplateEvenPagesCheckbox && els.cv7991WordTemplateEvenPagesCheckbox.checked),
      };
    }

    function openCv7991WordTemplateDialog(actionType = 'export_pending') {
      state.cv7991WordTemplatePendingAction = String(actionType || 'export_pending');
      /* Ẩn bảng nguồn trước khi mở bảng chọn form để bấm OK không bị “quay lại”
         bảng Lựa chọn cách sinh đề trong lúc hệ thống đang sinh/xuất file. */
      if (state.cv7991WordTemplatePendingAction === 'generate_multi' && els.cv7991GenerateExamModal) {
        els.cv7991GenerateExamModal.hidden = true;
      } else if (state.cv7991WordTemplatePendingAction === 'generate_single' && els.cv7991SingleExamOptionsModal) {
        els.cv7991SingleExamOptionsModal.hidden = true;
      }
      const stored = state.cv7991WordExportMeta && typeof state.cv7991WordExportMeta === 'object' ? state.cv7991WordExportMeta : {};
      if (els.cv7991WordTemplateDistrictInput) els.cv7991WordTemplateDistrictInput.value = String(stored.district || '').trim();
      if (els.cv7991WordTemplateSchoolInput) els.cv7991WordTemplateSchoolInput.value = String(stored.school || '').trim();
      if (els.cv7991WordTemplateSchoolYearInput) els.cv7991WordTemplateSchoolYearInput.value = String(stored.schoolYear || '').trim();
      if (els.cv7991WordTemplateDurationInput) els.cv7991WordTemplateDurationInput.value = String(stored.duration || '').trim();
      if (els.cv7991WordTemplateEssayLineCountInput) els.cv7991WordTemplateEssayLineCountInput.value = String(cv7991WordTemplateEssayLineCountValue(stored.essayLineCount || 3));
      if (els.cv7991WordTemplateEvenPagesCheckbox) els.cv7991WordTemplateEvenPagesCheckbox.checked = !!stored.evenPagesPerCode;
      syncCv7991WordTemplateDialog();
      if (els.cv7991WordTemplateModal) els.cv7991WordTemplateModal.hidden = false;
      requestAnimationFrame(() => {
        try {
          if (els.cv7991WordTemplateOkBtn) els.cv7991WordTemplateOkBtn.focus({ preventScroll: true });
        } catch (_) {}
      });
    }


    function cv7991WordTemplateTargetMons() {
      const pendingMons = Array.isArray(state.cv7991PendingExport && state.cv7991PendingExport.classKeys)
        ? state.cv7991PendingExport.classKeys.map(normMonKey).filter(Boolean)
        : [];
      return pendingMons.length ? Array.from(new Set(pendingMons)) : selectedCv7991Mons();
    }

    function cv7991WordTemplateDuplicateTitleInfo(title, previousTitle = '') {
      const cleanTitle = String(title || '').trim();
      const normalized = normalizeExamConfigNameForCompare(cleanTitle);
      const previousNormalized = normalizeExamConfigNameForCompare(previousTitle);
      if (!normalized || normalized === previousNormalized) return null;

      const mons = cv7991WordTemplateTargetMons();
      for (const mon of mons) {
        const entry = ensureClassEntry(mon);
        if (!entry) continue;
        const duplicated = hasDuplicateExamConfigNameForEntry(entry, cleanTitle);
        if (duplicated) {
          return {
            mon,
            displayName: cv7991ClassDisplayNameForTitle(mon) || mon,
            title: cleanTitle
          };
        }
      }
      return null;
    }

    async function cv7991RenameSavedExamTitleIfNeeded(previousTitle, nextTitle) {
      const oldTitle = String(previousTitle || '').trim();
      const newTitle = String(nextTitle || '').trim();
      const oldKey = normalizeExamConfigNameForCompare(oldTitle);
      const newKey = normalizeExamConfigNameForCompare(newTitle);
      if (!oldKey || !newKey || oldKey === newKey) return false;

      let changed = false;
      const mons = cv7991WordTemplateTargetMons();
      for (const mon of mons) {
        const entry = ensureClassEntry(mon);
        if (!entry) continue;

        const configs = syncExamConfigsForEntry(entry, classDataStudents(mon));
        let entryChanged = false;
        configs.forEach((cfg) => {
          if (normalizeExamConfigNameForCompare(examConfigNameText(cfg)) === oldKey) {
            cfg.name = newTitle;
            entryChanged = true;
          }
        });

        if (entryChanged) {
          entry.examConfigs = configs;
          const currentNo = parseInt(String(entry.examConfig && entry.examConfig.examNo || 0), 10) || 0;
          const currentCfg = configs.find((cfg) => (parseInt(String(cfg.examNo || 0), 10) || 0) === currentNo);
          if (currentCfg) entry.examConfig = currentCfg;
          changed = true;
        }
      }

      if (changed) {
        await pushClassDataToServerAndRefresh(`Đã cập nhật tên đề thành "${newTitle}" trong hệ thống lớp - môn.`);
        renderClassManagerSelect();
        renderExamConfigEditor(state.managerExamMons);
        renderCv7991DeleteExamOptions();
        renderCv7991ExamTitleDialogTable();
      }
      return changed;
    }

    async function confirmCv7991WordTemplateDialog() {
      const previousTitle = String(
        (state.cv7991PendingExport && state.cv7991PendingExport.examTitle)
        || (els.cv7991ExamTitleInput && els.cv7991ExamTitleInput.value)
        || ''
      ).trim();
      const settings = currentCv7991WordTemplateSettings();

      state.cv7991WordExportTemplate = settings.mode;
      state.cv7991WordExportMeta = {
        examTitle: settings.examTitle,
        district: settings.district,
        school: settings.school,
        schoolYear: settings.schoolYear,
        duration: settings.duration,
        essayLineCount: settings.essayLineCount,
        evenPagesPerCode: settings.evenPagesPerCode,
      };

      if (state.cv7991PendingExport && typeof state.cv7991PendingExport === 'object') {
        state.cv7991PendingExport.examTitle = settings.examTitle;
      }

      const actionType = String(state.cv7991WordTemplatePendingAction || 'export_pending');
      /* Hàm sinh/xuất được tạo ngay tại nơi người dùng bấm nút nguồn. Cách này giữ đúng
         phạm vi JavaScript của các hàm runCv7991... và tránh lỗi bấm OK nhưng không chạy. */
      const confirmRunner = cv7991WordTemplateConfirmRunner;
      /* OK là lệnh xác nhận cuối cùng: đóng bảng form mà không khôi phục bảng lựa chọn phía sau. */
      closeCv7991WordTemplateDialog(false);
      if (typeof confirmRunner !== 'function') {
        throw new Error(`Không tìm thấy lệnh xuất đề cho ${actionType}. Bạn đóng bảng và bấm Xuất đề Word lại.`);
      }
      await confirmRunner();
    }

    function getCv7991GenerateChoiceMode() {
      if (els.cv7991GenerateModeSingleRadio && els.cv7991GenerateModeSingleRadio.checked) return 'single';
      if (els.cv7991CodeModeCountRadio && els.cv7991CodeModeCountRadio.checked) return 'fixed_count';
      return 'per_student';
    }

    function cv7991HasEssayQuestionsSelected() {
      try {
        const counts = cv7991CurrentTypeCounts();
        return !!(counts && Number(counts.essay || 0) > 0);
      } catch (error) {
        return false;
      }
    }

    function setCv7991FreezeEssayOptionVisible(input, visible) {
      if (!input) return;
      const label = input.closest ? input.closest('label') : null;
      if (label) {
        label.hidden = !visible;
        label.style.display = visible ? '' : 'none';
        label.setAttribute('aria-hidden', visible ? 'false' : 'true');
      }
      if (!visible) input.checked = false;
    }

    function updateCv7991FreezeEssayVisibility() {
      const hasEssay = cv7991HasEssayQuestionsSelected();
      setCv7991FreezeEssayOptionVisible(els.cv7991FreezeEssayCheckbox, hasEssay);
      setCv7991FreezeEssayOptionVisible(els.cv7991FixedFreezeEssayCheckbox, hasEssay);
    }

    function syncCv7991CodeModeControls() {
      // Luôn hiển thị đủ các lựa chọn và các nút tích đi kèm để giáo viên dễ nhìn.
      if (els.cv7991PerStudentOptionsRow) els.cv7991PerStudentOptionsRow.hidden = false;
      if (els.cv7991CodeCountRow) els.cv7991CodeCountRow.hidden = false;
      if (els.cv7991CodeCountInput) els.cv7991CodeCountInput.disabled = false;
      if (els.cv7991FreezeEssayCheckbox) els.cv7991FreezeEssayCheckbox.disabled = false;
      if (els.cv7991SameQuizShuffleCheckbox) els.cv7991SameQuizShuffleCheckbox.disabled = false;
      if (els.cv7991FixedFreezeEssayCheckbox) els.cv7991FixedFreezeEssayCheckbox.disabled = false;
      if (els.cv7991FixedSameQuizShuffleCheckbox) els.cv7991FixedSameQuizShuffleCheckbox.disabled = false;
      updateCv7991FreezeEssayVisibility();
    }

    function cv7991ExamCodeLabelByIndex(index) {
      const n = Math.max(1, parseInt(String(index || 1), 10) || 1);
      return String(n).padStart(2, '0');
    }

    function getCv7991GenerateExamCodeMode() {
      const useFixedCount = !!(els.cv7991CodeModeCountRadio && els.cv7991CodeModeCountRadio.checked);
      if (!useFixedCount) return { mode: 'per_student', count: 0 };
      const raw = parseInt(String(els.cv7991CodeCountInput && els.cv7991CodeCountInput.value || ''), 10);
      if (!Number.isFinite(raw) || raw < 1) {
        throw new Error('Bạn nhập số mã đề cần sinh ra lớn hơn hoặc bằng 1.');
      }
      return { mode: 'fixed_count', count: Math.min(200, Math.floor(raw)) };
    }

    function cloneCv7991QuestionsForReuse(questions) {
      return (Array.isArray(questions) ? questions : []).map((question) => {
        const clone = Object.assign({}, question || {});
        if (Array.isArray(question && question.printOptions)) clone.printOptions = question.printOptions.map((opt) => Object.assign({}, opt || {}));
        if (Array.isArray(question && question.printStatements)) clone.printStatements = question.printStatements.map((item) => Object.assign({}, item || {}));
        if (Array.isArray(question && question.printAnswerItems)) clone.printAnswerItems = question.printAnswerItems.slice();
        return clone;
      });
    }

    function openCv7991GenerateExamDialog() {
      if (!els.cv7991GenerateExamModal) return;
      syncCv7991CodeModeControls();
      els.cv7991GenerateExamModal.hidden = false;
    }

    function closeCv7991GenerateExamDialog() {
      if (els.cv7991GenerateExamModal) els.cv7991GenerateExamModal.hidden = true;
    }

    function openCv7991SingleExamOptionsDialog() {
      if (els.cv7991SingleExamOptionsModal) els.cv7991SingleExamOptionsModal.hidden = false;
    }

    function closeCv7991SingleExamOptionsDialog() {
      if (els.cv7991SingleExamOptionsModal) els.cv7991SingleExamOptionsModal.hidden = true;
    }

    function cleanStudentsForPhone(studentsMap) {
      const out = {};
      Object.keys(studentsMap || {}).forEach((rawSo) => {
        const so = normalizeStudentId(rawSo);
        const name = String(studentsMap[rawSo] || '').trim();
        if (so && name) out[so] = name;
      });
      return out;
    }

    function buildPhoneSafeClassDataForSave(sourceData) {
      const payload = {};
      Object.keys(sourceData || {}).forEach((rawKey) => {
        const key = normMonKey(rawKey);
        if (!key) return;
        const entry = (sourceData[rawKey] && typeof sourceData[rawKey] === 'object') ? sourceData[rawKey] : {};
        const studentsRaw = (entry.students && typeof entry.students === 'object') ? entry.students : {};
        const students = cleanStudentsForPhone(studentsRaw);
        const droppedStudents = normalizeDroppedStudents(entry.droppedStudents, students);
        const configs = normalizeExamConfigCollection(entry.examConfigs, entry.examConfig, students);
        const latest = configs.length ? configs[configs.length - 1] : normalizeStoredExamConfig(entry.examConfig, students);
        const safeEntry = {
          students,
          // Đóng gói cấu hình đề thành chuỗi JSON để app điện thoại không đọc nhầm
          // các số câu hỏi 38, 39, 40... thành mã học sinh cần quét.
          examConfigs: JSON.stringify(configs),
          examConfig: JSON.stringify(latest),
          // Lưu dạng chuỗi để web đọc được nhưng app quét cũ không hiểu nhầm các mã này là học sinh đang hoạt động.
          droppedStudents: JSON.stringify(sortedStudentKeysFromMap(droppedStudents))
        };
        // Khi lớp vừa tạo nhưng chưa có danh sách học sinh, app Android cũ sẽ lấy số thuộc tính
        // của object lớp làm số học sinh cần quét. Thêm items: [] để app hiểu là chưa có học sinh,
        // tránh lỗi quét 2-3 thẻ đã hiện OK ở các lớp mới tạo.
        if (!Object.keys(students).length) safeEntry.items = [];
        payload[key] = safeEntry;
      });
      return payload;
    }

    function classSubjectKeysEquivalent(a, b) {
      const aa = normMonKey(a || '');
      const bb = normMonKey(b || '');
      if (!aa || !bb) return false;
      return aa === bb || aa.toLowerCase() === bb.toLowerCase();
    }

    function deleteMatchingKeysFromObject(obj, mon) {
      const key = normMonKey(mon || '');
      if (!key || !obj || typeof obj !== 'object') return [];
      const deleted = [];
      Object.keys(obj).forEach((itemKey) => {
        if (classSubjectKeysEquivalent(itemKey, key)) {
          delete obj[itemKey];
          deleted.push(itemKey);
        }
      });
      return deleted;
    }

    function clearSavedResultsForClassSubject(mon) {
      deleteMatchingKeysFromObject(state.scanHistory, mon);
      deleteMatchingKeysFromObject(state.examModeByMon, mon);
      deleteMatchingKeysFromObject(state.selectedExamNoByMon, mon);
      if (state.currentReportPayload && classSubjectKeysEquivalent(state.currentReportPayload.mon, mon)) {
        state.currentReportPayload = null;
      }
    }

    function removeClassSubjectEverywhere(mon) {
      const key = normMonKey(mon || '');
      if (!key) return;
      deleteMatchingKeysFromObject(state.classData, key);
      clearSavedResultsForClassSubject(key);
      state.managerExamMons = (state.managerExamMons || []).filter((item) => !classSubjectKeysEquivalent(item, key));
      state.managerExamEditNo = 0;
      if (classSubjectKeysEquivalent(state.currentMon, key)) {
        state.currentMon = '';
        state.currentStudents = {};
        state.currentDroppedStudents = {};
        state.currentShortNames = {};
        state.currentLiveAnswers = {};
        clearCurrentQuestion();
      }
      if (classSubjectKeysEquivalent(state.managerMon, key)) state.managerMon = '';
    }

    async function pushAllPersistentDataToServerAndRefresh(message) {
      await Promise.all([
        apiPut('/api/class-data', { data: buildPhoneSafeClassDataForSave(state.classData) }),
        apiPut('/api/scan-history', { data: state.scanHistory || {} })
      ]);
      renderClassOptions();
      if (state.currentMon && state.classData[state.currentMon]) {
        buildCurrentRoster();
      } else {
        const keys = Object.keys(state.classData || {}).sort((a, b) => a.localeCompare(b, 'vi'));
        state.currentMon = keys[0] || '';
        buildCurrentRoster();
      }
      renderAll();
      if (message) classManagerStatus(message, 'ok');
    }

    async function pushClassDataToServerAndRefresh(message) {
      await apiPut('/api/class-data', { data: buildPhoneSafeClassDataForSave(state.classData) });
      renderClassOptions();
      if (state.currentMon && state.classData[state.currentMon]) {
        buildCurrentRoster();
      } else {
        const keys = Object.keys(state.classData || {}).sort((a, b) => a.localeCompare(b, 'vi'));
        state.currentMon = keys[0] || '';
        buildCurrentRoster();
      }
      renderAll();
      if (message) classManagerStatus(message, 'ok');
    }

    function resetRevealState() {
      state.revealAnswers = false;
      state.selectedCorrect = '';
    }

    function resetExamPreviewDone() {
      state.examPreviewDone = false;
    }

    function finishAutoExamPreview() {
      const cfg = currentExamConfig();
      if (!isAutoExamMode()) throw new Error('Bạn chưa tích chọn chế độ chấm theo mã đề.');
      if (!hasValidExamConfig(cfg)) throw new Error('Lớp-Môn này chưa có đề trắc nghiệm hợp lệ.');
      const qNo = currentQuestionNo('exam');
      if (qNo > cfg.questionCount) throw new Error(`Đã hết số câu cấu hình (${cfg.questionCount} câu).`);
      const stats = answeredStats();
      if (!stats.answered) throw new Error('Chưa có học sinh nào được quét ở câu hiện tại.');
      state.examPreviewDone = true;
      state.questionFrozen = true;
      renderCurrentBoard();
      const examNo = currentExamSerial(state.currentMon);
      const currentScanLabel = scanQuestionLabelFromConfig(cfg, qNo);
      showLoginStatus(`Đã chốt hiển thị câu ${currentScanLabel} của đề ${examNo}. Bấm nút mũi tên → để lưu và sang câu tiếp.`, 'ok');
    }

    function cancelCurrentAutoExamScan() {
      const cfg = currentExamConfig();
      if (!isAutoExamMode()) throw new Error('Bạn chưa tích chọn chế độ chấm theo mã đề.');
      if (!hasValidExamConfig(cfg)) throw new Error('Lớp-Môn này chưa có đề trắc nghiệm hợp lệ.');
      const qNo = currentQuestionNo('exam');
      if (qNo > cfg.questionCount) throw new Error(`Đã hết số câu cấu hình (${cfg.questionCount} câu).`);
      const hasAnyScan = Object.values(state.currentLiveAnswers || {}).some((row) => {
        const ans = String((row && row.ans) || '').toUpperCase();
        return ['A', 'B', 'C', 'D'].includes(ans);
      });
      if (!hasAnyScan && !state.examPreviewDone) throw new Error('Chưa có kết quả quét của câu hiện tại để hủy.');
      clearCurrentQuestion();
      renderCurrentBoard();
      updateTopStats();
      const currentScanLabel = scanQuestionLabelFromConfig(cfg, qNo);
      showLoginStatus(`Đã hủy kết quả quét câu ${currentScanLabel}. Bạn quét lại câu này từ đầu.`, 'ok');
    }

    function answeredStats() {
      let answered = 0, ca = 0, cb = 0, cc = 0, cd = 0;
      Object.values(state.currentLiveAnswers || {}).forEach((row) => {
        const ans = String((row && row.ans) || '').toUpperCase();
        if (['A', 'B', 'C', 'D'].includes(ans)) {
          answered += 1;
          if (ans === 'A') ca += 1;
          if (ans === 'B') cb += 1;
          if (ans === 'C') cc += 1;
          if (ans === 'D') cd += 1;
        }
      });
      return { answered, ca, cb, cc, cd };
    }

    function scannedAnswerNeedsResult() {
      if (typeof window.wordPresentationIsOpen === 'function' && window.wordPresentationIsOpen()) {
        return typeof window.wordPresentationHasRecognizedScanAnswer === 'function'
          && window.wordPresentationHasRecognizedScanAnswer();
      }
      if (!isRegularTestSessionActive()) return false;
      const item = currentRegularTestSlide();
      const info = regularTestCurrentAnswerInfo(item);
      return ['mc', 'tf'].includes(info.format) && info.hasAnswer && (info.format !== 'tf' || !regularTestGroupedTfSlide(item) || !!regularTestActiveTfLetter(item));
    }

    function isRegularTestRepickingResult() {
      const pending = state.regularTestRepickPending;
      return !!(pending && isRegularTestSessionActive()
        && pending.regularTestUid === state.regularTestSession.uid
        && pending.regularQuestionIndex === state.regularTestSession.index
        && pending.scanMon === state.currentMon);
    }

    function handleScannedAnswerChoice(choice) {
      if (typeof window.wordPresentationHandleRepickChoice === 'function'
        && window.wordPresentationHandleRepickChoice(choice)) return true;
      if (isRegularTestRepickingResult()) {
        previewRegularTestQuestion(choice);
        return true;
      }
      return scannedAnswerNeedsResult();
    }

    function updateRevealButtons(answered) {
      const enabled = answered > 0;
      const autoMode = isAutoExamMode();
      const wordRepick = typeof window.wordPresentationIsRepickingResult === 'function'
        && window.wordPresentationIsRepickingResult();
      const repicking = wordRepick || isRegularTestRepickingResult();
      const resultOnly = scannedAnswerNeedsResult();
      const canChooseManually = enabled && (repicking || (!autoMode && !resultOnly));
      const map = { A: els.correctBtnA, B: els.correctBtnB, C: els.correctBtnC, D: els.correctBtnD };
      Object.entries(map).forEach(([k, btn]) => {
        btn.disabled = !canChooseManually;
        /* Đảo trạng thái màu so với cách cũ: có học sinh đã quét thì cả bốn
           nút đều xanh. Nút được chọn làm đáp án là nút duy nhất mất màu;
           chọn nút khác sẽ trả màu cho nút trước và bỏ màu ở nút mới. */
        const isSelectedCorrect = state.revealAnswers && state.selectedCorrect === k;
        btn.classList.toggle('active', canChooseManually && !isSelectedCorrect);
      });
      if (els.hideRevealBtn) {
        els.hideRevealBtn.disabled = repicking || resultOnly || autoMode || !enabled || !state.revealAnswers;
      }
    }

    function updateAutoExamPreviewButton(answered, cfg, qNo, autoMode) {
      if (!els.examDoneBtn) return;
      const inRange = !!(autoMode && cfg && qNo <= cfg.questionCount);
      const canPreview = inRange && answered > 0 && !state.examPreviewDone;
      els.examDoneBtn.disabled = !canPreview;
      if (!autoMode) els.examDoneBtn.title = 'Bấm nút "Chấm theo mã đề" để dùng nút Xem.';
      else if (!inRange) els.examDoneBtn.title = `Đã hết số câu cấu hình (${cfg ? cfg.questionCount : 0} câu).`;
      else if (!answered) els.examDoneBtn.title = 'Chưa có học sinh nào được quét ở câu hiện tại.';
      else if (state.examPreviewDone) els.examDoneBtn.title = 'Đã bấm Xem cho câu hiện tại. Bấm nút mũi tên → để lưu và sang câu tiếp.';
      else els.examDoneBtn.title = `Hiện đúng/sai cho câu ${scanQuestionLabelFromConfig(cfg, qNo)} của ${examConfigLabel(cfg)}.`;
    }

    function updateAutoFinishButton(answered) {
      if (!els.finishAutoBtn) return;
      const cfg = currentExamConfig();
      const hasCfg = hasValidExamConfig(cfg);
      const autoMode = isAutoExamMode();
      const qNo = currentQuestionNo();
      const inRange = autoMode && qNo <= cfg.questionCount;
      const canRun = autoMode && inRange && answered > 0;
      // The fast scan path updates counters without rebuilding the roster.
      // Refresh Xem here so the first valid student scan enables it immediately.
      updateAutoExamPreviewButton(answered, cfg, qNo, autoMode);
      els.finishAutoBtn.hidden = !autoMode;
      els.finishAutoBtn.disabled = !canRun;
      if (!hasCfg) {
        els.finishAutoBtn.title = 'Lớp-Môn này chưa có đề trắc nghiệm hợp lệ.';
      } else if (!autoMode) {
        els.finishAutoBtn.title = 'Bấm nút "Chấm theo mã đề" để dùng nút mũi tên sang phải.';
      } else if (!inRange) {
        els.finishAutoBtn.title = `Đã hết số câu cấu hình (${cfg.questionCount} câu).`;
      } else if (!answered) {
        els.finishAutoBtn.title = 'Chưa có học sinh nào được quét ở câu hiện tại.';
      } else if (state.examPreviewDone) {
        els.finishAutoBtn.title = `Lưu câu ${scanQuestionLabelFromConfig(cfg, qNo)} đã chốt và sang câu tiếp.`;
      } else {
        els.finishAutoBtn.title = `Chấm tự động theo mã đề cho câu ${scanQuestionLabelFromConfig(cfg, qNo)}.`;
      }
    }

    function showLoginStatus(message, type = 'info') {
      els.loginStatus.textContent = message || '';
      els.loginStatus.className = `status show ${type}`;
    }

    function clearLoginStatus() {
      els.loginStatus.textContent = '';
      els.loginStatus.className = 'status';
    }

    function reportMode() {
      if (reportDatasetMode() === 'exam') return 'by_exam';
      return els.reportModeTime && els.reportModeTime.checked ? 'by_time' : 'by_question';
    }

    function reportDatasetMode() {
      return els.reportDatasetExam && els.reportDatasetExam.checked ? 'exam' : 'normal';
    }

    function reportDatasetLabel(dataset) {
      return dataset === 'exam' ? 'Kết quả theo mã đề' : 'Kết quả thường xuyên';
    }

    function reportTitleLabel(dataset) {
      return dataset === 'exam' ? 'KẾT QUẢ THEO MÃ ĐỀ' : 'KẾT QUẢ THƯỜNG XUYÊN';
    }

    function reportExamNoValue() {
      const raw = String((els.reportExamNo && els.reportExamNo.value) || '').trim();
      const value = parseInt(raw || '0', 10);
      return Number.isNaN(value) || value < 1 ? 0 : value;
    }

    function reportExamOptionsForMon(mon) {
      const key = normMonKey(mon || state.currentMon || '');
      if (!key) return [];
      const nums = new Set();
      historyListByDataset(key, 'exam').forEach((item) => {
        const n = recordExamNumber(item);
        if (n > 0) nums.add(n);
      });
      examConfigsForMon(key).forEach((cfg) => {
        const n = parseInt(String((cfg && cfg.examNo) || 0), 10);
        if (!Number.isNaN(n) && n > 0) nums.add(n);
      });
      return [...nums].sort((a, b) => a - b);
    }

    function refreshReportExamOptions() {
      if (!els.reportExamNo) return;
      const dataset = reportDatasetMode();
      const mon = normMonKey(state.currentMon || '');
      const options = reportExamOptionsForMon(mon);
      const current = reportExamNoValue();
      const markup = ['<option value="">Tất cả</option>']
        .concat(options.map((n) => `<option value="${n}">${escapeHtml(examConfigLabelByNo(mon, n))}</option>`))
        .join('');
      els.reportExamNo.innerHTML = markup;
      if (current && options.includes(current)) els.reportExamNo.value = String(current);
      else els.reportExamNo.value = '';
      els.reportExamNo.disabled = dataset !== 'exam' || !options.length;
    }

    function isMultiCodeRecord(item) {
      return String((item && item.mode) || '').trim() === 'multi_code';
    }

    function historyListByDataset(mon, dataset = 'all') {
      const hist = Array.isArray(state.scanHistory[mon]) ? [...state.scanHistory[mon]] : [];
      if (dataset === 'exam') return hist.filter((item) => isMultiCodeRecord(item));
      if (dataset === 'normal') return hist.filter((item) => !isMultiCodeRecord(item));
      return hist;
    }

    function syncReportInputsForDataset() {
      const mon = normMonKey(state.currentMon || '');
      let hist = mon ? historyListByDataset(mon, reportDatasetMode()) : [];
      const examNo = reportDatasetMode() === 'exam' ? reportExamNoValue() : 0;
      if (examNo) hist = hist.filter((item) => recordExamNumber(item) === examNo);
      if (els.reportQFrom) els.reportQFrom.value = hist.length ? '1' : '';
      if (els.reportQTo) els.reportQTo.value = '';
      const firstDate = parseIsoDate(hist[0] && hist[0].date) || '';
      const lastDate = parseIsoDate(hist[hist.length - 1] && hist[hist.length - 1].date) || firstDate;
      if (els.reportDateFrom) els.reportDateFrom.value = firstDate;
      if (els.reportDateTo) els.reportDateTo.value = lastDate;
    }

    function parseIsoDate(value) {
      const s = String(value || '').trim();
      if (!/^\d{4}-\d{2}-\d{2}$/.test(s)) return null;
      return s;
    }

    function formatViDate(value) {
      const s = parseIsoDate(value);
      if (!s) return '';
      const [y, m, d] = s.split('-');
      return `${d}/${m}/${y}`;
    }

    function updateViewResultsButton() {
      const buttons = [els.viewResultsBtn, els.topViewResultsBtn].filter(Boolean);
      if (!buttons.length) return;
      const historyCount = currentHistoryList().length;
      /* Khách vẫn nhìn thấy và bấm được đúng nút của tài khoản Full. Luồng
         mở báo cáo sẽ hiển thị bảng yêu cầu đăng nhập thay vì khóa nút. */
      const guest = !state.token;
      const enabled = guest || (!!state.currentMon && historyCount > 0);
      let title = '';
      if (guest) {
        title = 'Bấm để đăng nhập và xem kết quả.';
      } else if (!state.currentMon) {
        title = 'Chọn Lớp-Môn trước để xem báo cáo.';
      } else if (!historyCount) {
        title = 'Lớp-Môn này chưa có dữ liệu đã lưu.';
      } else {
        title = `Xem kết quả của ${state.currentMon}`;
      }
      buttons.forEach((btn) => {
        btn.disabled = !enabled;
        btn.title = title;
      });
    }

    function updateReportFilterUi() {
      if (!els.reportModeQuestion) return;
      const isExam = reportDatasetMode() === 'exam';
      const byQuestion = !isExam && reportMode() === 'by_question';
      if (els.reportNormalFilterBox) {
        els.reportNormalFilterBox.classList.toggle('active', !isExam);
        els.reportNormalFilterBox.classList.toggle('inactive', isExam);
      }
      if (els.reportExamFilterBox) {
        els.reportExamFilterBox.classList.toggle('active', isExam);
        els.reportExamFilterBox.classList.toggle('inactive', !isExam);
      }
      if (els.reportExamNoWrap) els.reportExamNoWrap.style.display = '';
      els.reportQuestionFromWrap.style.display = byQuestion ? '' : 'none';
      els.reportQuestionToWrap.style.display = byQuestion ? '' : 'none';
      els.reportDateFromWrap.style.display = (!isExam && !byQuestion) ? '' : 'none';
      els.reportDateToWrap.style.display = (!isExam && !byQuestion) ? '' : 'none';
      if (els.reportModeQuestion) els.reportModeQuestion.disabled = isExam;
      if (els.reportModeTime) els.reportModeTime.disabled = isExam;
      if (els.reportQFrom) els.reportQFrom.disabled = isExam || !byQuestion;
      if (els.reportQTo) els.reportQTo.disabled = isExam || !byQuestion;
      if (els.reportDateFrom) els.reportDateFrom.disabled = isExam || byQuestion;
      if (els.reportDateTo) els.reportDateTo.disabled = isExam || byQuestion;
      if (els.reportExamNo) els.reportExamNo.disabled = !isExam || !Array.from(els.reportExamNo.options || []).some((opt, idx) => idx > 0);
    }

    function updateReportExportButton() {
      if (!els.reportExportBtn) return;
      const enabled = !!state.currentReportPayload && Array.isArray(state.currentReportPayload.rows) && state.currentReportPayload.rows.length > 0;
      els.reportExportBtn.disabled = !enabled;
      els.reportExportBtn.title = enabled ? 'Xuất bảng thống kê hiện tại ra file Excel' : 'Chưa có dữ liệu báo cáo để xuất';
    }

    function renderReportPlaceholder(message) {
      state.currentReportPayload = null;
      updateReportExportButton();
      if (!els.reportPreviewWrap) return;
      const dataset = reportDatasetMode();
      els.reportPreviewTitle.textContent = reportTitleLabel(dataset);
      const metaText = [];
      if (state.currentMon) metaText.push(`Lớp-Môn: ${state.currentMon}`);
      metaText.push(`Loại: ${reportDatasetLabel(dataset)}`);
      els.reportPreviewMeta.textContent = metaText.join('   |   ') || 'Chưa có dữ liệu để hiển thị.';
      els.reportPreviewWrap.innerHTML = `<div class="report-placeholder">${message}</div>`;
    }

    function prepareReportPayload(mon, dataset, mode, fromDate, toDate, qFromText = '', qToText = '', examNoText = '') {
      let hist = historyListByDataset(mon, dataset);
      if (dataset === 'normal') {
        hist = hist.map((rec, idx) => Object.assign({}, rec, { _reportQuestionNo: idx + 1 }));
      }
      let filterText = '';
      const examNoFilter = dataset === 'exam' ? (parseInt(String(examNoText || '0').trim() || '0', 10) || 0) : 0;
      if (examNoFilter > 0) {
        const examFilterCfg = examConfigsForMon(mon).find((cfg) => cfg.examNo === examNoFilter) || null;
        hist = hist.filter((rec) => recordExamNumber(rec) === examNoFilter && sameExamInstanceRecord(rec, examFilterCfg));
      }
      if (dataset === 'exam') {
        filterText = examNoFilter > 0 ? `Đề số: ${examNoFilter}` : '';
      } else if (mode === 'by_time') {
        const dFrom = parseIsoDate(fromDate);
        const dTo = parseIsoDate(toDate);
        if (!dFrom || !dTo) throw new Error('Bạn chọn theo thời gian thì phải nhập đủ Từ ngày và Đến ngày.');
        if (dTo < dFrom) throw new Error('Đến ngày phải lớn hơn hoặc bằng Từ ngày.');
        hist = hist.filter((rec) => {
          const d = parseIsoDate(rec && rec.date);
          return !!d && d >= dFrom && d <= dTo;
        });
        filterText = `Theo thời gian: ${formatViDate(dFrom)} → ${formatViDate(dTo)}`;
      } else {
        let qFrom = parseInt(String(qFromText || '1').trim() || '1', 10);
        let qTo = String(qToText || '').trim() ? parseInt(String(qToText || '').trim(), 10) : hist.length;
        if (Number.isNaN(qFrom)) throw new Error('Từ câu phải là số nguyên.');
        if (Number.isNaN(qTo)) throw new Error('Đến câu phải là số nguyên hoặc để trống.');
        if (qFrom < 1) qFrom = 1;
        if (qTo < 1) qTo = 1;
        if (qTo > hist.length) qTo = hist.length;
        if (qFrom > qTo) throw new Error('Từ câu phải nhỏ hơn hoặc bằng Đến câu.');
        hist = hist.slice(qFrom - 1, qTo);
        filterText = `Theo câu: ${qFrom} → ${qTo}`;
      }
      if (!hist.length) throw new Error(`Không có dữ liệu cho ${reportDatasetLabel(dataset).toLowerCase()}${examNoFilter > 0 ? ` của đề ${examNoFilter}` : ''}.`);

      const isExamDataset = dataset === 'exam';
      if (isExamDataset) {
        hist = [...hist].sort((a, b) => {
          const da = String((a && a.date) || '');
          const db = String((b && b.date) || '');
          if (da !== db) return da.localeCompare(db);
          const ea = recordExamNumber(a);
          const eb = recordExamNumber(b);
          if (ea !== eb) return ea - eb;
          const qa = parseInt(String((a && a.q) || 0), 10) || 0;
          const qb = parseInt(String((b && b.q) || 0), 10) || 0;
          if (qa !== qb) return qa - qb;
          return String((a && a.ts) || '').localeCompare(String((b && b.ts) || ''));
        });
      }

      const rosterObj = (state.classData[mon] && typeof state.classData[mon] === 'object') ? state.classData[mon] : {};
      const students = (rosterObj.students && typeof rosterObj.students === 'object') ? rosterObj.students : {};
      const orderedStudents = Object.keys(students).sort((a, b) => {
        const aa = /^\d+$/.test(a) ? parseInt(a, 10) : Number.MAX_SAFE_INTEGER;
        const bb = /^\d+$/.test(b) ? parseInt(b, 10) : Number.MAX_SAFE_INTEGER;
        if (aa !== bb) return aa - bb;
        return String(a).localeCompare(String(b), 'vi');
      });

      const rows = orderedStudents.map((so) => {
        let correctCount = 0;
        let answeredCount = 0;
        const examScoreProgressByNo = {};
        const answerCells = hist.map((rec) => {
          const answers = rec && typeof rec.answers === 'object' ? rec.answers : {};
          const ansKey = resolveStudentKey(answers, so) || String(so);
          const ans = String(answers[ansKey] || '').trim().toUpperCase();
          const expected = expectedAnswerForRecord(rec, so);
          const cfg = isExamDataset ? examConfigForHistoryRecord(mon, rec) : null;
          const scoreItem = cfg ? scoreItemForExamRecord(cfg, rec, so) : null;
          const displayAns = cfg ? displayAnswerForScoreItem(ans, scoreItem) : ans;
          if (['A', 'B', 'C', 'D'].includes(ans)) {
            answeredCount += 1;
            if (cfg) {
              const no = recordExamNumber(rec) || 0;
              if (!examScoreProgressByNo[no]) examScoreProgressByNo[no] = { score: 0, trueFalseGroups: {}, cfg };
              addExamScoreProgress(examScoreProgressByNo[no], cfg, rec, so, ans, expected);
            }
            if (['A', 'B', 'C', 'D'].includes(expected)) {
              if (cfg ? isCorrectAnswerForScoreItem(ans, expected, scoreItem) : ans === expected) {
                correctCount += 1;
                return { text: displayAns, cls: 'report-ans-green' };
              }
              return { text: displayAns, cls: 'report-ans-red' };
            }
            return { text: displayAns, cls: 'report-ans-black' };
          }
          return { text: '-', cls: 'report-ans-black' };
        });
        const pct = answeredCount > 0 ? Math.round((correctCount / answeredCount) * 100) : 0;
        const score10 = Math.max(0, Math.min(10, pct / 10));
        const examScore = Object.values(examScoreProgressByNo).reduce((sum, progress) => sum + finalizeExamScoreProgress(progress, progress && progress.cfg), 0);
        return {
          stt: so,
          name: students[so] || '',
          correctCount,
          pctText: `${pct}%`,
          pctValue: pct,
          score10Text: score10.toFixed(1).replace('.', ','),
          scoreAchievedText: formatScoreValue(examScore),
          scoreAchievedValue: Number(examScore) || 0,
          answeredCount,
          resultRank: null,
          rankText: '—',
          isTopResult: false,
          staticCells: [],
          answers: answerCells
        };
      });

      // Xếp hạng KHÔNG dùng thời gian:
      // - Kết quả thường xuyên: số câu đúng nhiều hơn xếp trên.
      // - Kết quả theo mã đề: điểm đạt cao hơn xếp trên.
      // - Cùng kết quả chính thì đồng hạng.
      // Chỉ xếp những học sinh đã có ít nhất một câu trả lời.
      const rankedRows = rows.filter((row) => Number(row.answeredCount) > 0);
      const primaryValue = (row) => isExamDataset
        ? (Number(row.scoreAchievedValue) || 0)
        : (Number(row.correctCount) || 0);
      rankedRows.sort((a, b) => primaryValue(b) - primaryValue(a));

      let denseRank = 0;
      let lastPrimary = null;
      rankedRows.forEach((row) => {
        const currentPrimary = primaryValue(row);
        if (lastPrimary === null || Math.abs(currentPrimary - lastPrimary) >= 1e-9) {
          denseRank += 1;
          lastPrimary = currentPrimary;
        }
        row.resultRank = denseRank;
      });

      rows.forEach((row) => {
        row.rankText = row.resultRank ? String(row.resultRank) : '—';
        row.isTopResult = row.resultRank === 1;
        row.staticCells = isExamDataset
          ? [
              { text: row.stt, center: true },
              { text: row.name, center: false },
              { text: row.scoreAchievedText, center: true },
              { text: row.rankText, center: true }
            ]
          : [
              { text: row.stt, center: true },
              { text: row.name, center: false },
              { text: row.pctText, center: true },
              { text: row.score10Text, center: true },
              { text: row.rankText, center: true }
            ];
      });

      const firstDate = parseIsoDate(hist[0] && hist[0].date);
      const lastDate = parseIsoDate(hist[hist.length - 1] && hist[hist.length - 1].date);
      let dateSummaryText = '';
      if (firstDate && lastDate) {
        dateSummaryText = firstDate === lastDate
          ? `Ngày ${formatViDate(firstDate)}`
          : `Ngày ${formatViDate(firstDate)} → ${formatViDate(lastDate)}`;
      }

      const staticHeaders = isExamDataset
        ? ['STT', 'Họ và tên', 'Điểm đạt', 'Xếp hạng']
        : ['STT', 'Họ và tên', 'Tỷ lệ đúng', 'Quy đổi điểm 10', 'Xếp hạng'];
      const questionHeaders = hist.map((rec, idx) => {
        if (isExamDataset) {
          const qValue = (rec && rec.q) ? rec.q : (idx + 1);
          const cfg = examConfigsForMon(mon).find((entry) => entry.examNo === recordExamNumber(rec));
          const savedLabel = cleanScanQuestionLabel(rec && rec.q_label, '');
          const label = savedLabel || scanQuestionLabelFromConfig(cfg, qValue);
          return `Câu ${label}`;
        }
        return formatQuestionLabelForRecord(rec, idx);
      });

      let dateGroups = [];
      let examGroups = [];
      if (isExamDataset) {
        const segments = [];
        hist.forEach((rec) => {
          const iso = parseIsoDate(rec && rec.date);
          const dateLabel = iso ? `Ngày ${formatViDate(iso)}` : 'Không rõ ngày';
          const examNo = recordExamNumber(rec);
          const last = segments[segments.length - 1];
          if (last && last.dateLabel === dateLabel && last.examNo === examNo) {
            last.count += 1;
          } else {
            segments.push({ dateLabel, examNo, count: 1 });
          }
        });
        dateGroups = segments.map((item) => ({ label: item.dateLabel, count: item.count }));
        examGroups = segments.map((item) => ({ label: `Đề ${item.examNo}`, count: item.count }));
      } else {
        hist.forEach((rec) => {
          const iso = parseIsoDate(rec && rec.date);
          const label = iso ? `Ngày ${formatViDate(iso)}` : 'Không rõ ngày';
          const last = dateGroups[dateGroups.length - 1];
          if (last && last.label === label) {
            last.count += 1;
          } else {
            dateGroups.push({ label, count: 1 });
          }
        });
      }

      return {
        mon,
        dataset,
        datasetLabel: reportDatasetLabel(dataset),
        title: `${reportTitleLabel(dataset)} ${mon}${examNoFilter > 0 ? ` - Đề ${examNoFilter}` : ''}`,
        filterText,
        dateSummaryText,
        staticHeaders,
        questionHeaders,
        dateGroups,
        examGroups,
        isExamDataset,
        headerRowCount: isExamDataset ? 3 : 2,
        headers: staticHeaders.concat(questionHeaders),
        rows
      };
    }

    function renderReportPreview(payload) {
      state.currentReportPayload = payload;
      updateReportExportButton();
      if (!els.reportPreviewWrap) return;
      els.reportPreviewTitle.textContent = payload.title || reportTitleLabel(reportDatasetMode());
      const metaParts = [];
      if (payload.datasetLabel) metaParts.push(`Loại: ${payload.datasetLabel}`);
      if (payload.dateSummaryText) metaParts.push(payload.dateSummaryText);
      if (payload.filterText) metaParts.push(payload.filterText);
      els.reportPreviewMeta.textContent = metaParts.join('   |   ') || `Lớp-Môn: ${payload.mon || '-'}`;

      const headerRowCount = Math.max(2, Number(payload.headerRowCount) || 2);
      const staticHeadHtml = (payload.staticHeaders || ['STT', 'Họ và tên', 'Tỷ lệ đúng', 'Quy đổi điểm 10', 'Xếp hạng']).map((head, idx) => {
        const leftCls = idx === 1 ? '' : ' report-cell-center';
        return `<th rowspan="${headerRowCount}" class="report-static-head${leftCls}">${escapeHtml(head)}</th>`;
      }).join('');
      const dateGroupHtml = (payload.dateGroups || []).length
        ? (payload.dateGroups || []).map((group) => `<th colspan="${Math.max(1, Number(group.count) || 1)}" class="report-date-group">${escapeHtml(group.label || '')}</th>`).join('')
        : `<th colspan="${Math.max(1, (payload.questionHeaders || []).length)}" class="report-date-group">Câu hỏi</th>`;
      const examGroupHtml = payload.isExamDataset
        ? ((payload.examGroups || []).map((group) => `<th colspan="${Math.max(1, Number(group.count) || 1)}" class="report-exam-group">${escapeHtml(group.label || '')}</th>`).join('')
          || `<th colspan="${Math.max(1, (payload.questionHeaders || []).length)}" class="report-exam-group">Đề</th>`)
        : '';
      const questionHeadHtml = (payload.questionHeaders || []).map((head) => `<th class="report-cell-center">${escapeHtml(head)}</th>`).join('');

      const rowHtml = (payload.rows || []).map((row) => {
        const answerHtml = (row.answers || []).map((cell) => `<td class="report-cell-center ${escapeHtml(cell.cls || '')}">${escapeHtml(cell.text || '-')}</td>`).join('');
        const cells = Array.isArray(row.staticCells) && row.staticCells.length
          ? row.staticCells
          : [
              { text: row.stt || '', center: true },
              { text: row.name || '', center: false },
              { text: row.pctText || '0%', center: true },
              { text: row.score10Text || '0,0', center: true },
              { text: row.rankText || '—', center: true }
            ];
        const staticCellsHtml = cells.map((cell, idx) => {
          const centerCls = (cell && cell.center) || idx !== 1 ? 'report-cell-center' : '';
          const topNameCls = idx === 1 && row.isTopResult ? ' report-top-student-name' : '';
          return `<td class="${centerCls}${topNameCls}">${escapeHtml((cell && cell.text) || '')}</td>`;
        }).join('');
        return `<tr>${staticCellsHtml}${answerHtml}</tr>`;
      }).join('');

      const totalCols = (payload.staticHeaders || []).length + (payload.questionHeaders || []).length;
      const headRows = payload.isExamDataset
        ? `<tr>${staticHeadHtml}${dateGroupHtml}</tr><tr>${examGroupHtml}</tr><tr>${questionHeadHtml}</tr>`
        : `<tr>${staticHeadHtml}${dateGroupHtml}</tr><tr>${questionHeadHtml}</tr>`;
      els.reportPreviewWrap.innerHTML = `
        <table class="report-table">
          <thead>${headRows}</thead>
          <tbody>${rowHtml || `<tr><td colspan="${totalCols}"><div class="report-placeholder" style="margin:0;">Không có học sinh nào trong danh sách lớp.</div></td></tr>`}</tbody>
        </table>`;
    }

    function buildReportPreviewFromForm() {
      const mon = normMonKey(state.currentMon || '');
      if (!state.token) throw new Error('Bạn chưa đăng nhập.');
      if (!mon) throw new Error('Bạn chưa chọn Lớp-Môn.');
      const payload = prepareReportPayload(
        mon,
        reportDatasetMode(),
        reportMode(),
        els.reportDateFrom ? els.reportDateFrom.value : '',
        els.reportDateTo ? els.reportDateTo.value : '',
        els.reportQFrom ? els.reportQFrom.value : '',
        els.reportQTo ? els.reportQTo.value : '',
        els.reportExamNo ? els.reportExamNo.value : ''
      );
      renderReportPreview(payload);
      return payload;
    }

    function sanitizeFilenamePart(value) {
      return String(value || '')
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .replace(/[^a-zA-Z0-9_-]+/g, '_')
        .replace(/^_+|_+$/g, '') || 'bao_cao';
    }

    function buildReportExportHtml(payload) {
      const metaParts = [];
      if (payload.datasetLabel) metaParts.push(`Loại: ${payload.datasetLabel}`);
      if (payload.dateSummaryText) metaParts.push(payload.dateSummaryText);
      if (payload.filterText) metaParts.push(payload.filterText);
      const metaText = metaParts.join(' | ');
      const headerRowCount = Math.max(2, Number(payload.headerRowCount) || 2);
      const staticHeadHtml = (payload.staticHeaders || ['STT', 'Họ và tên', 'Tỷ lệ đúng', 'Quy đổi điểm 10', 'Xếp hạng']).map((head) => `<th rowspan="${headerRowCount}">${escapeHtml(head)}</th>`).join('');
      const dateGroupHtml = (payload.dateGroups || []).length
        ? (payload.dateGroups || []).map((group) => `<th colspan="${Math.max(1, Number(group.count) || 1)}">${escapeHtml(group.label || '')}</th>`).join('')
        : `<th colspan="${Math.max(1, (payload.questionHeaders || []).length)}">Câu hỏi</th>`;
      const examGroupHtml = payload.isExamDataset
        ? ((payload.examGroups || []).map((group) => `<th colspan="${Math.max(1, Number(group.count) || 1)}">${escapeHtml(group.label || '')}</th>`).join('')
          || `<th colspan="${Math.max(1, (payload.questionHeaders || []).length)}">Đề</th>`)
        : '';
      const questionHeadHtml = (payload.questionHeaders || []).map((head) => `<th>${escapeHtml(head)}</th>`).join('');
      const rowHtml = (payload.rows || []).map((row) => {
        const answers = (row.answers || []).map((cell) => {
          let color = '#0f172a';
          if (cell.cls === 'report-ans-green') color = '#16a34a';
          if (cell.cls === 'report-ans-red') color = '#dc2626';
          return `<td style="text-align:center;color:${color};font-weight:700;">${escapeHtml(cell.text || '-')}</td>`;
        }).join('');
        const cells = Array.isArray(row.staticCells) && row.staticCells.length
          ? row.staticCells
          : [
              { text: row.stt || '', center: true },
              { text: row.name || '', center: false },
              { text: row.pctText || '0%', center: true },
              { text: row.score10Text || '0,0', center: true },
              { text: row.rankText || '—', center: true }
            ];
        const staticCellsHtml = cells.map((cell, idx) => {
          const alignStyle = (cell && cell.center) || idx !== 1 ? 'text-align:center;' : '';
          const topNameStyle = idx === 1 && row.isTopResult
            ? 'background:#22c55e;color:#ffffff;font-weight:700;'
            : '';
          return `<td style="${alignStyle}${topNameStyle}">${escapeHtml((cell && cell.text) || '')}</td>`;
        }).join('');
        return `<tr>${staticCellsHtml}${answers}</tr>`;
      }).join('');
      const headRows = payload.isExamDataset
        ? `<tr>${staticHeadHtml}${dateGroupHtml}</tr><tr>${examGroupHtml}</tr><tr>${questionHeadHtml}</tr>`
        : `<tr>${staticHeadHtml}${dateGroupHtml}</tr><tr>${questionHeadHtml}</tr>`;
      return `<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
  body { font-family: 'Times New Roman', Times, serif; padding: 16px; color: #0f172a; }
  h1 { margin: 0 0 8px; font-size: 24px; }
  .meta { margin: 0 0 12px; color: #475569; }
  table { border-collapse: collapse; font-size: 13px; }
  th, td { border: 1px solid #cbd5e1; padding: 8px 10px; white-space: nowrap; }
  th { background: #f1f5f9; font-weight: 700; text-align: center; }
  thead tr:first-child th { background: #e0e7ff; }
  thead tr:nth-child(2) th { background: #f8fafc; }
  thead tr:nth-child(3) th, th[rowspan] { background: #f1f5f9; }
</style>
</head>
<body>
  <h1>${escapeHtml(payload.title || reportTitleLabel(payload.dataset || 'normal'))}</h1>
  <div class="meta">${escapeHtml(metaText)}</div>
  <table>
    <thead>${headRows}</thead>
    <tbody>${rowHtml}</tbody>
  </table>

<!-- Bản điều chỉnh 2026-10-05 v32:
     - Điện thoại có nút chọn thời gian đếm ngược, đồng bộ với ô Số giây trên máy tính.
     - Khi START quét, app Android ẩn toàn bộ điều khiển MVIP để camera chiếm vùng giữa.
     - Khi STOP, camera tắt/ẩn và vùng điều khiển MVIP mở lớn trở lại. -->


<!-- MVIP 2026-10-07: Bảng Kết quả câu hỏi gọn một dòng -->
<style id="mvip-result-one-line-20261007">
  /* Bỏ tiêu đề, chỉ còn 4 mục: Đáp án đúng | Tỷ lệ đúng | Lưu | Hủy */
  #resultModal:not([hidden]) .result-dialog-title {
    display:none !important;
  }
  #resultModal:not([hidden]) .result-dialog {
    display:flex !important;
    grid-template-columns:none !important;
    grid-template-rows:none !important;
    grid-template-areas:none !important;
    align-items:center !important;
    justify-content:flex-start !important;
    flex-wrap:nowrap !important;
    gap:10px !important;
    min-height:0 !important;
    height:auto !important;
    width:min(920px, calc(100vw - 24px)) !important;
    padding:9px 12px !important;
    box-sizing:border-box !important;
    overflow:hidden !important;
  }
  #resultModal:not([hidden]) .result-dialog-row,
  #resultModal:not([hidden]) .result-rate-line {
    display:flex !important;
    align-items:center !important;
    flex:0 1 auto !important;
    min-width:0 !important;
    margin:0 !important;
    padding:6px 10px !important;
    border:2px solid #94a3b8 !important;
    border-radius:9px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:clamp(15px, 1.45vw, 22px) !important;
    line-height:1.05 !important;
    font-weight:800 !important;
    white-space:nowrap !important;
  }
  #resultModal:not([hidden]) .result-dialog-row { gap:5px !important; }
  #resultModal:not([hidden]) .result-correct-badge {
    display:inline !important;
    min-width:0 !important;
    width:auto !important;
    height:auto !important;
    padding:0 2px !important;
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    color:#16a34a !important;
    font:900 inherit !important;
    line-height:inherit !important;
  }
  #resultModal:not([hidden]) .result-dialog-actions {
    display:flex !important;
    align-items:center !important;
    justify-content:flex-end !important;
    flex:0 0 auto !important;
    flex-wrap:nowrap !important;
    gap:7px !important;
    margin:0 0 0 auto !important;
    white-space:nowrap !important;
  }
  #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    min-height:36px !important;
    padding:6px 13px !important;
    border-radius:8px !important;
    font-size:clamp(14px, 1.15vw, 18px) !important;
    line-height:1 !important;
  }
  #resultModal:not([hidden]) #singleExamGuideBtn,
  #resultModal:not([hidden]) #resultRepickBtn {
    display:none !important;
  }

  /* Khi đang hiện danh sách quét bên phải, bảng kết quả chỉ cao đúng một dòng. */
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
    height:64px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
    left:8px !important;
    right:8px !important;
    top:5px !important;
    bottom:auto !important;
    width:auto !important;
    height:auto !important;
    padding:7px 10px !important;
    gap:8px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
    font-size:clamp(14px, 1.35vw, 21px) !important;
    padding:5px 8px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    min-height:34px !important;
    padding:5px 11px !important;
    font-size:clamp(13px, 1.05vw, 17px) !important;
  }
</style>


<!-- MVIP 2026-10-07: tăng gấp đôi chiều cao + cỡ chữ bảng kết quả -->
<style id="mvip-result-double-size-20261007">
  #resultModal:not([hidden]) .result-dialog,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog {
    column-gap:20px !important;
    gap:20px !important;
    padding:16px 24px !important;
  }

  #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-row,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-row {
    gap:12px !important;
    padding:12px 20px !important;
    border-width:3px !important;
    border-radius:18px !important;
    font-size:clamp(30px,2.9vw,44px) !important;
  }

  #resultModal:not([hidden]) .result-correct-badge,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge,
  body.single-exam-presenting #resultModal:not([hidden]) .result-correct-badge,
  #resultModal.is-word-question-result:not([hidden]) .result-correct-badge {
    min-width:68px !important;
    height:64px !important;
    padding:0 18px !important;
    border-radius:14px !important;
    font-size:inherit !important;
  }

  #resultModal:not([hidden]) .result-rate-line,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line,
  body.single-exam-presenting #resultModal:not([hidden]) .result-rate-line,
  #resultModal.is-word-question-result:not([hidden]) .result-rate-line {
    padding:16px 20px !important;
    border-width:3px !important;
    border-radius:18px !important;
    font-size:clamp(30px,2.8vw,42px) !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions {
    gap:14px !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions .nav-btn {
    min-height:68px !important;
    height:68px !important;
    padding:10px 24px !important;
    border-radius:16px !important;
    font-size:clamp(28px,2.3vw,36px) !important;
  }

  body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
    height:116px !important;
    min-height:116px !important;
    max-height:116px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
    top:8px !important;
    height:100px !important;
    min-height:100px !important;
    max-height:100px !important;
    padding:10px 16px !important;
    gap:14px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
    padding:10px 16px !important;
    font-size:clamp(26px,2.5vw,38px) !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge {
    height:56px !important;
    min-width:60px !important;
    padding:0 14px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    height:62px !important;
    min-height:62px !important;
    padding:8px 20px !important;
    font-size:clamp(26px,2.1vw,34px) !important;
  }

  @media (max-width:720px) {
    #resultModal:not([hidden]) .result-dialog,
    body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
    body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
    #resultModal.is-word-question-result:not([hidden]) .result-dialog {
      gap:10px !important;
      padding-left:12px !important;
      padding-right:12px !important;
    }
    #resultModal:not([hidden]) .result-dialog-row,
    #resultModal:not([hidden]) .result-rate-line {
      padding-left:12px !important;
      padding-right:12px !important;
      font-size:26px !important;
    }
  }
</style>

</body>
</html>`;
    }

    function exportCurrentReportToExcel() {
      const payload = state.currentReportPayload;
      if (!payload || !Array.isArray(payload.rows) || !payload.rows.length) {
        alert('Chưa có dữ liệu báo cáo để xuất Excel.');
        return;
      }
      const monPart = sanitizeFilenamePart(payload.mon || state.currentMon || 'lop_mon');
      const datasetPart = sanitizeFilenamePart(payload.dataset === 'exam' ? 'ma_de' : 'thuong');
      const modePart = sanitizeFilenamePart(payload.dataset === 'exam' ? 'theo_de_so' : (reportMode() === 'by_time' ? 'theo_thoi_gian' : 'theo_cau'));
      const filename = `Bao_cao_${monPart}_${datasetPart}_${modePart}.xls`;
      const html = buildReportExportHtml(payload);
      const blob = new Blob(['\ufeff', html], { type: 'application/vnd.ms-excel;charset=utf-8;' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = filename;
      document.body.appendChild(a);
      a.click();
      a.remove();
      setTimeout(() => URL.revokeObjectURL(url), 1000);
    }

    function renderResultClassRequiredOptions() {
      if (!els.resultClassRequiredSelect) return;
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean)
        .sort((a, b) => a.localeCompare(b, 'vi'));
      els.resultClassRequiredSelect.innerHTML = ['<option value="">Chọn lớp - môn</option>']
        .concat(keys.map((key) => `<option value="${escapeHtml(key)}">${escapeHtml(key)}</option>`)).join('');
      els.resultClassRequiredSelect.value = state.currentMon && keys.includes(state.currentMon) ? state.currentMon : '';
    }

    function closeResultClassRequiredModal() {
      if (!els.resultClassRequiredModal) return;
      els.resultClassRequiredModal.hidden = true;
      els.resultClassRequiredModal.setAttribute('aria-hidden', 'true');
    }

    function openResultClassRequiredModal() {
      if (!state.token || isGuestAccount()) {
        guardLoginRequired();
        return;
      }
      if (!els.resultClassRequiredModal || !els.resultClassRequiredSelect) {
        showLoginStatus('Bạn cần chọn lớp - môn để xem kết quả', 'err');
        return;
      }
      renderResultClassRequiredOptions();
      els.resultClassRequiredModal.hidden = false;
      els.resultClassRequiredModal.setAttribute('aria-hidden', 'false');
      requestAnimationFrame(() => {
        try { els.resultClassRequiredSelect.focus({ preventScroll:true }); } catch (_) {}
      });
    }

    function applyResultClassRequiredSelection() {
      if (!els.resultClassRequiredSelect) return;
      const mon = normMonKey(els.resultClassRequiredSelect.value || '');
      if (!mon) return;
      state.currentMon = mon;
      if (els.classSubjectSelect) els.classSubjectSelect.value = mon;
      if (els.compactClassSubjectSelect) els.compactClassSubjectSelect.value = mon;
      buildCurrentRoster();
      setAccountNote();
      renderAll();
      closeResultClassRequiredModal();
      setTimeout(() => openReportModal(), 0);
    }

    function openReportModal() {
      if (!els.reportModal) return;
      try {
        if (els.classManagerModal) els.classManagerModal.hidden = true;
      } catch (closeErr) {}
      if (!state.token) {
        guardLoginRequired();
        return;
      }
      if (!state.currentMon) {
        openResultClassRequiredModal();
        return;
      }
      els.reportModal.hidden = false;
      els.reportModal.style.display = 'flex';
      els.reportModal.style.visibility = 'visible';
      els.reportModal.style.opacity = '1';
      els.reportModal.style.pointerEvents = 'auto';
      els.reportModal.style.zIndex = '2147483647';
      document.body.classList.add('report-open');
      document.body.style.overflow = 'hidden';
      renderReportPlaceholder('Đang nạp bảng kết quả...');
      try {
        const hist = currentHistoryList();
        if (!hist.length) {
          refreshReportExamOptions();
          syncReportInputsForDataset();
          updateReportFilterUi();
          renderReportPlaceholder(`Lớp-Môn ${escapeHtml(state.currentMon)} chưa có dữ liệu đã lưu để xem kết quả.`);
          return;
        }
        const normalHist = historyListByDataset(state.currentMon, 'normal');
        const examHist = historyListByDataset(state.currentMon, 'exam');
        if (els.reportDatasetNormal) els.reportDatasetNormal.checked = normalHist.length > 0 || !examHist.length;
        if (els.reportDatasetExam) els.reportDatasetExam.checked = examHist.length > 0 && !normalHist.length;
        if (els.reportModeQuestion) els.reportModeQuestion.checked = true;
        if (els.reportModeTime) els.reportModeTime.checked = false;
        refreshReportExamOptions();
        syncReportInputsForDataset();
        updateReportFilterUi();
        updateReportExportButton();
        buildReportPreviewFromForm();
      } catch (error) {
        renderReportPlaceholder(escapeHtml(error.message || 'Không thể tạo báo cáo.'));
      }
    }

    function closeReportModal() {
      if (!els.reportModal) return;
      els.reportModal.hidden = true;
      els.reportModal.style.display = '';
      els.reportModal.style.visibility = '';
      els.reportModal.style.opacity = '';
      els.reportModal.style.pointerEvents = '';
      els.reportModal.style.zIndex = '';
      document.body.classList.remove('report-open');
      updateReportExportButton();
      document.body.style.overflow = '';
    }

    window.openReportModal = openReportModal;
    window.closeReportModal = closeReportModal;

    function readSavedAccounts() {
      try {
        const raw = localStorage.getItem(STORAGE_KEY_ACCOUNTS);
        if (!raw) return [];
        const arr = JSON.parse(raw);
        if (!Array.isArray(arr)) return [];
        const seen = new Set();
        return arr
          .map(item => ({
            username: String((item && item.username) || '').trim(),
            password: String((item && item.password) || ''),
            token: String((item && item.token) || ''),
            lastUsedAt: Number((item && item.lastUsedAt) || 0)
          }))
          .filter(item => item.username)
          .filter(item => {
            const key = item.username.toLowerCase();
            if (seen.has(key)) return false;
            seen.add(key);
            return true;
          })
          .sort((a, b) => (b.lastUsedAt || 0) - (a.lastUsedAt || 0));
      } catch (_) {
        return [];
      }
    }

    function writeSavedAccounts(accounts) {
      try {
        localStorage.setItem(STORAGE_KEY_ACCOUNTS, JSON.stringify(Array.isArray(accounts) ? accounts : []));
      } catch (_) {}
    }

    function getSavedAccount(username) {
      const key = String(username || '').trim().toLowerCase();
      if (!key) return null;
      return readSavedAccounts().find(item => item.username.toLowerCase() === key) || null;
    }

    function saveAccountToList(username, password, token = '') {
      const user = String(username || '').trim();
      if (!user) return;
      const pass = String(password || '');
      const accounts = readSavedAccounts().filter(item => item.username.toLowerCase() !== user.toLowerCase());
      accounts.unshift({ username: user, password: pass, token: String(token || ''), lastUsedAt: Date.now() });
      writeSavedAccounts(accounts);
    }

    function clearSavedAccountToken(username) {
      const user = String(username || '').trim();
      if (!user) return;
      const accounts = readSavedAccounts().map(item => item.username.toLowerCase() === user.toLowerCase()
        ? { ...item, token: '', lastUsedAt: Date.now() }
        : item);
      writeSavedAccounts(accounts);
    }

    function setSavedAccountMenuOpen(open) {
      const canOpen = !!open && !!els.savedAccountMenu && readSavedAccounts().length > 0;
      if (els.savedAccountMenu) els.savedAccountMenu.hidden = !canOpen;
      if (els.savedAccountCombo) els.savedAccountCombo.classList.toggle('is-open', canOpen);
      if (els.savedAccountToggle) els.savedAccountToggle.setAttribute('aria-expanded', canOpen ? 'true' : 'false');
      if (els.username) els.username.setAttribute('aria-expanded', canOpen ? 'true' : 'false');
    }

    function closeSavedAccountMenu() {
      setSavedAccountMenuOpen(false);
    }

    function renderSavedAccountMenu(accounts, selectedUsername = '') {
      if (!els.savedAccountMenu) return;
      const list = Array.isArray(accounts) ? accounts : [];
      const selected = String(selectedUsername || (els.username && els.username.value) || '').trim().toLowerCase();
      if (!list.length) {
        els.savedAccountMenu.innerHTML = '<div class="saved-account-empty">Chưa có tài khoản nào được lưu trên máy này.</div>';
        closeSavedAccountMenu();
        return;
      }
      els.savedAccountMenu.innerHTML = list.map((item) => {
        const username = String(item && item.username || '').trim();
        const active = username.toLowerCase() === selected;
        return `<button class="saved-account-option${active ? ' is-selected' : ''}" data-username="${escapeHtml(username)}" role="option" aria-selected="${active ? 'true' : 'false'}" type="button">${escapeHtml(username)}</button>`;
      }).join('');
    }

    function renderSavedAccountSelect(preferUsername = '') {
      const accounts = readSavedAccounts();
      const currentValue = String(
        preferUsername
        || (els.savedAccountSelect && els.savedAccountSelect.value)
        || (els.username && els.username.value)
        || ''
      ).trim();
      const prefer = currentValue && accounts.some(item => item.username.toLowerCase() === currentValue.toLowerCase())
        ? (accounts.find(item => item.username.toLowerCase() === currentValue.toLowerCase()) || {}).username || currentValue
        : (accounts[0] ? accounts[0].username : '');
      if (els.savedAccountSelect) {
        els.savedAccountSelect.innerHTML = '<option value="">Chọn tài khoản đã lưu</option>' + accounts.map(item => `<option value="${escapeHtml(item.username)}">${escapeHtml(item.username)}</option>`).join('');
        els.savedAccountSelect.value = prefer;
      }
      renderSavedAccountMenu(accounts, currentValue || prefer);
    }

    function applySavedAccountToInputs(username, silent = false) {
      const account = getSavedAccount(username);
      if (!account) return false;
      if (els.username) els.username.value = account.username;
      if (els.password) els.password.value = account.password || '';
      if (els.savedAccountSelect) els.savedAccountSelect.value = account.username;
      state.password = account.password || '';
      renderSavedAccountMenu(readSavedAccounts(), account.username);
      closeSavedAccountMenu();
      if (!silent) {
        showLoginStatus(`Đã chọn tài khoản ${account.username}. Bạn có thể bấm Đăng nhập ngay.`, 'info');
      }
      return true;
    }

    function saveAuth() {
      localStorage.setItem(STORAGE_KEY, JSON.stringify({ token: state.token, username: state.username, password: state.password }));
      saveAccountToList(state.username, state.password, state.token);
      renderSavedAccountSelect(state.username);
    }

    function clearAuthStorage(clearSavedLogin = false, preserveCurrentInputs = true) {
      let previous = null;
      try {
        const raw = localStorage.getItem(STORAGE_KEY);
        previous = raw ? JSON.parse(raw) : null;
      } catch (_) {
        previous = null;
      }

      const username = preserveCurrentInputs
        ? (state.username || String((els.username && els.username.value) || '').trim())
        : String((previous && previous.username) || '').trim();
      const password = preserveCurrentInputs
        ? (state.password || String((els.password && els.password.value) || ''))
        : String((previous && previous.password) || '');

      localStorage.setItem(STORAGE_KEY, JSON.stringify({ token: '', username, password }));
      if (username && getSavedAccount(username)) {
        clearSavedAccountToken(username);
      }
      renderSavedAccountSelect(username);
      if (clearSavedLogin) {
        if (els.username) els.username.value = username;
        if (els.password) els.password.value = password;
      }
    }

    function setAuthUi(isLoggedIn) {
      /* Menu và hai combo Lớp-Môn luôn sáng. Với khách, thao tác được chặn
         bằng bảng Đăng nhập lớn thay vì dùng disabled làm mờ điều khiển. */
      els.classSubjectSelect.disabled = false;
      els.compactClassSubjectSelect.disabled = false;
      /* Các nút của Full vẫn hiện và bấm được với khách. Từng luồng tự mở
         bảng Đăng nhập khi chức năng cần tài khoản. */
      if (els.viewResultsBtn) els.viewResultsBtn.disabled = false;
      if (els.topViewResultsBtn) els.topViewResultsBtn.disabled = false;
      els.refreshBtn.disabled = !isLoggedIn;
      els.clearLiveBtn.disabled = !isLoggedIn;
      if (els.logoutBtn) els.logoutBtn.disabled = !isLoggedIn;
      if (els.subscriptionOpenBtn) {
        els.subscriptionOpenBtn.hidden = true;
        els.subscriptionOpenBtn.disabled = true;
      }
      if (els.classManagerBtn) els.classManagerBtn.disabled = false;
      if (els.actionMenuBtn) els.actionMenuBtn.disabled = false;
      if (els.menuResultsBtn) els.menuResultsBtn.disabled = false;
      if (els.menuClassManagerBtn) els.menuClassManagerBtn.disabled = false;
      if (!isLoggedIn) closeActionMenu();
      els.authStatePill.className = `pill ${isLoggedIn ? 'online' : 'offline'}`;
      els.authStateText.textContent = isLoggedIn ? `Đã đăng nhập: ${state.username}` : 'Chưa đăng nhập';
      if (isLoggedIn && state.username) renderSavedAccountSelect(state.username);
    }

    function setWsUi(online, text) {
      state.wsConnected = !!online;
      els.wsStatePill.className = `pill ${online ? 'online' : 'offline'}`;
      els.wsStateText.textContent = text || (online ? 'Realtime đang kết nối' : 'Realtime chưa kết nối');
    }

    function apiHeaders() {
      return {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${state.token}`
      };
    }

    async function apiGet(path) {
      const res = await fetch(API_BASE + path, { headers: { 'Authorization': `Bearer ${state.token}` } });
      const text = await res.text();
      let data = {};
      try { data = text ? JSON.parse(text) : {}; } catch (_) {}
      if (!res.ok) {
        throw new Error((data && data.detail) ? data.detail : `HTTP ${res.status}`);
      }
      return data;
    }

    async function apiPut(path, payload) {
      const res = await fetch(API_BASE + path, {
        method: 'PUT',
        headers: apiHeaders(),
        body: JSON.stringify(payload)
      });
      const text = await res.text();
      let data = {};
      try { data = text ? JSON.parse(text) : {}; } catch (_) {}
      if (!res.ok) {
        throw new Error((data && data.detail) ? data.detail : `HTTP ${res.status}`);
      }
      return data;
    }


    async function apiPost(path, payload) {
      const res = await fetch(API_BASE + path, {
        method: 'POST',
        headers: apiHeaders(),
        body: JSON.stringify(payload || {})
      });
      const text = await res.text();
      let data = {};
      try { data = text ? JSON.parse(text) : {}; } catch (_) {}
      if (!res.ok) {
        throw new Error((data && data.detail) ? data.detail : `HTTP ${res.status}`);
      }
      return data;
    }

    async function forgotPassword() {
      clearLoginStatus();
      const emailInput = window.prompt(
        'Nhập EMAIL đã đăng ký để đặt lại mật khẩu.\nBấm Hủy để thoát.',
        ''
      );
      if (emailInput === null) return;

      const email = String(emailInput || '').trim().toLowerCase();
      let username = '';

      if (!email) {
        username = String((els.username && els.username.value) || '').trim();
        if (!username) {
          const usernameInput = window.prompt('Nhập USERNAME đã đăng ký:', '');
          if (usernameInput === null) return;
          username = String(usernameInput || '').trim();
        }
      }

      if (!email && !username) {
        showLoginStatus('Bạn cần nhập EMAIL hoặc USERNAME.', 'err');
        return;
      }

      try {
        if (els.forgotPasswordBtn) {
          els.forgotPasswordBtn.disabled = true;
          els.forgotPasswordBtn.textContent = 'Đang gửi...';
        }

        const response = await fetch(API_BASE + '/api/forgot-password', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            email: email || null,
            username: username || null
          })
        });

        const text = await response.text();
        let data = {};
        try { data = text ? JSON.parse(text) : {}; } catch (_) {}

        if (!response.ok) {
          throw new Error((data && data.detail) ? data.detail : `HTTP ${response.status}`);
        }

        openAlertModal('Mvip đã gửi link đổi mật khẩu, bạn vào email để thay đổi mật khẩu', 'Thông báo');
      } catch (error) {
        showLoginStatus('Gửi yêu cầu quên mật khẩu không thành công: ' + error.message, 'err');
      } finally {
        if (els.forgotPasswordBtn) {
          els.forgotPasswordBtn.disabled = false;
          els.forgotPasswordBtn.textContent = 'Quên mật khẩu';
        }
      }
    }


    function formatVnd(value) {
      return `${Math.max(0, Number(value || 0)).toLocaleString('vi-VN')} ₫`;
    }

    function limitedSupportMessage() {
      return 'Nâng cấp MVIP để sử dụng toàn màn hình';
    }

    let accessNoticeMode = '';
    let accessNoticeFullscreenHost = null;
    let accessSubscriptionHosted = false;
    const accessNoticeHome = els.limitedUpgradeModal ? {
      parent: els.limitedUpgradeModal.parentNode,
      next: els.limitedUpgradeModal.nextSibling,
    } : null;
    const accessSubscriptionHome = els.subscriptionModal ? {
      parent: els.subscriptionModal.parentNode,
      next: els.subscriptionModal.nextSibling,
    } : null;

    function currentAccessFullscreenHost() {
      const nativeHost = document.fullscreenElement || document.webkitFullscreenElement || null;
      if (nativeHost instanceof HTMLElement) return nativeHost;
      const wordPresenter = document.getElementById('wordPresentationPresenter');
      if (wordPresenter instanceof HTMLElement && wordPresenter.classList.contains('is-fallback-fullscreen')) return wordPresenter;
      const singlePresenter = document.getElementById('singleExamPresenter');
      if (singlePresenter instanceof HTMLElement && document.body.classList.contains('single-exam-fullscreen-fallback')) return singlePresenter;
      return null;
    }

    function restoreAccessNoticeHome() {
      if (!accessNoticeFullscreenHost || !els.limitedUpgradeModal || !accessNoticeHome || !accessNoticeHome.parent) {
        accessNoticeFullscreenHost = null;
        return;
      }
      try {
        const next = accessNoticeHome.next && accessNoticeHome.next.parentNode === accessNoticeHome.parent
          ? accessNoticeHome.next : null;
        accessNoticeHome.parent.insertBefore(els.limitedUpgradeModal, next);
      } catch (_) {
        try { accessNoticeHome.parent.appendChild(els.limitedUpgradeModal); } catch (_) {}
      }
      accessNoticeFullscreenHost = null;
    }

    function hostAccessNoticeInFullscreen() {
      const host = currentAccessFullscreenHost();
      if (!host || !els.limitedUpgradeModal || host.contains(els.limitedUpgradeModal)) {
        accessNoticeFullscreenHost = host;
        return host;
      }
      try {
        host.appendChild(els.limitedUpgradeModal);
        accessNoticeFullscreenHost = host;
      } catch (_) {
        accessNoticeFullscreenHost = null;
      }
      return accessNoticeFullscreenHost;
    }

    function hostSubscriptionForAccessNotice(host) {
      if (!(host instanceof HTMLElement) || !els.subscriptionModal || host.contains(els.subscriptionModal)) return;
      try {
        host.appendChild(els.subscriptionModal);
        accessSubscriptionHosted = true;
      } catch (_) {}
    }

    function restoreAccessSubscriptionHome() {
      if (!accessSubscriptionHosted || !els.subscriptionModal || !accessSubscriptionHome || !accessSubscriptionHome.parent) return;
      try {
        const next = accessSubscriptionHome.next && accessSubscriptionHome.next.parentNode === accessSubscriptionHome.parent
          ? accessSubscriptionHome.next : null;
        accessSubscriptionHome.parent.insertBefore(els.subscriptionModal, next);
      } catch (_) {
        try { accessSubscriptionHome.parent.appendChild(els.subscriptionModal); } catch (_) {}
      }
      accessSubscriptionHosted = false;
    }

    function isGuestAccount() {
      const tier = String(state.sessionTier || '').trim().toLowerCase();
      return !state.token || tier === 'guest';
    }

    function isLimitedAccount() {
      const tier = String(state.sessionTier || '').trim().toLowerCase();
      return tier === 'limited' || document.body.classList.contains('mvip-tier-limited');
    }

    function accountAccessMode() {
      if (isGuestAccount()) return 'guest';
      if (isLimitedAccount()) return 'limited';
      return '';
    }

    function closeLimitedUpgradeNotice() {
      if (!els.limitedUpgradeModal) return;
      els.limitedUpgradeModal.hidden = true;
      els.limitedUpgradeModal.setAttribute('aria-hidden', 'true');
      accessNoticeMode = '';
      restoreAccessNoticeHome();
    }

    function openLimitedUpgradeNotice(kind = 'feature', forcedMode = '') {
      const mode = forcedMode || accountAccessMode();
      if (!mode) return false;
      accessNoticeMode = mode;
      const scanRestricted = mode === 'limited' && kind === 'scan';
      const answerRestricted = mode === 'limited' && kind === 'answer';
      const message = mode === 'guest'
        ? 'Bạn cần đăng nhập để sử dụng chức năng này'
        : (scanRestricted
          ? 'Tài khoản miễn phí, bạn không thể sử dụng chức năng quét thẻ. Bạn cần nâng cấp mvip'
          : (answerRestricted
            ? 'Tài khoản miễn phí, bạn không thể sử dụng chức năng này. Bạn cần nâng cấp MVIP'
            : 'Tài khoản miễn phí, bạn không thể sử dụng chức năng này. Bạn cần nâng cấp MVIP.'));
      if (!els.limitedUpgradeModal || !els.limitedUpgradeMessage) {
        openAlertModal(message, 'Thông báo');
        return true;
      }
      hostAccessNoticeInFullscreen();
      els.limitedUpgradeMessage.textContent = message;
      if (els.limitedUpgradeActionBtn) {
        els.limitedUpgradeActionBtn.textContent = mode === 'guest'
          ? 'Đăng nhập'
          : ((scanRestricted || answerRestricted) ? 'Nâng cấp mvip' : 'Nâng cấp MVIP');
      }
      els.limitedUpgradeModal.hidden = false;
      els.limitedUpgradeModal.setAttribute('aria-hidden', 'false');
      requestAnimationFrame(() => {
        try { els.limitedUpgradeActionBtn?.focus({ preventScroll: true }); } catch (_) {}
      });
      return true;
    }

    function guardLimitedAccount(kind = 'feature') {
      const mode = accountAccessMode();
      if (!mode) return false;
      return openLimitedUpgradeNotice(kind, mode);
    }

    function guardLoginRequired() {
      if (!isGuestAccount()) return false;
      return openLimitedUpgradeNotice('login', 'guest');
    }

    window.mvipLimitedAccess = {
      isGuestAccount,
      isLimitedAccount,
      accountMode: accountAccessMode,
      shouldBlockPremium: () => !!accountAccessMode(),
      guard: guardLimitedAccount,
      guardLogin: guardLoginRequired,
      showScanRestricted: () => openLimitedUpgradeNotice('scan', 'limited'),
      show: openLimitedUpgradeNotice,
      close: closeLimitedUpgradeNotice,
    };

    /* Ghi nhớ màn hình làm việc khi khách phải đăng nhập giữa chừng.
       Chỉ tạm ẩn giao diện đang mở; không gọi các hàm đóng trình chiếu vì
       các hàm đó sẽ xóa trang/slide, câu hỏi và vị trí hiện tại. */
    const accessLoginLayoutClasses = [
      'word-presentation-scan-split',
      'word-presentation-layout-switching',
      'single-exam-presenting',
      'single-exam-fullscreen-fallback',
      'mvip-whiteboard-split-open',
    ];
    let pendingAccessLoginReturn = null;

    function accessLoginElementIsVisible(element) {
      if (!(element instanceof HTMLElement) || element.hidden) return false;
      try {
        const style = window.getComputedStyle(element);
        return style.display !== 'none' && style.visibility !== 'hidden'
          && element.getClientRects().length > 0;
      } catch (_) {
        return true;
      }
    }

    function collectAccessLoginSurfaces() {
      const surfaces = new Set();
      const surfaceSelector = '[class*="modal"], [role="dialog"], .word-presentation-presenter, .single-exam-presenter, #mvipWhiteboardPanel';
      document.querySelectorAll(surfaceSelector)
        .forEach((element) => {
          if (!accessLoginElementIsVisible(element)) return;
          let surface = element;
          let parent = element.parentElement;
          while (parent && parent !== document.body) {
            if (parent.matches(surfaceSelector) && accessLoginElementIsVisible(parent)) surface = parent;
            parent = parent.parentElement;
          }
          if (surface === els.limitedUpgradeModal || surface === els.alertModal) return;
          if (els.limitedUpgradeModal && els.limitedUpgradeModal.contains(surface)) return;
          if (els.alertModal && els.alertModal.contains(surface)) return;
          surfaces.add(surface);
        });
      return Array.from(surfaces).map((element) => ({
        element,
        hidden: !!element.hidden,
        ariaHidden: element.getAttribute('aria-hidden'),
      }));
    }

    function showAccessLoginForm() {
      const loginSection = document.getElementById('dang-nhap');
      try {
        if (window.location.hash !== '#dang-nhap') window.location.hash = 'dang-nhap';
      } catch (_) {}
      requestAnimationFrame(() => {
        if (loginSection) {
          try { loginSection.scrollIntoView({ behavior: 'smooth', block: 'start' }); }
          catch (_) { try { loginSection.scrollIntoView(); } catch (_) {} }
        }
        setTimeout(() => {
          try { els.username?.focus({ preventScroll: true }); } catch (_) {}
        }, 380);
      });
    }

    async function beginAccessLoginReturn() {
      if (!pendingAccessLoginReturn) {
        const wordPresenter = document.getElementById('wordPresentationPresenter');
        const singlePresenter = document.getElementById('singleExamPresenter');
        const fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || null;
        const wordWasFullscreen = !!(wordPresenter && (
          wordPresenter.classList.contains('is-fallback-fullscreen')
          || fullscreenElement === wordPresenter
          || (fullscreenElement instanceof Element && wordPresenter.contains(fullscreenElement))
        ));
        const singleWasFullscreen = !!(singlePresenter && (
          document.body.classList.contains('single-exam-fullscreen-fallback')
          || fullscreenElement === singlePresenter
          || (fullscreenElement instanceof Element && singlePresenter.contains(fullscreenElement))
        ));
        const activeElement = document.activeElement instanceof HTMLElement ? document.activeElement : null;
        pendingAccessLoginReturn = {
          hash: window.location.hash,
          scrollX: window.scrollX,
          scrollY: window.scrollY,
          activeElement,
          surfaces: collectAccessLoginSurfaces(),
          bodyClasses: Object.fromEntries(accessLoginLayoutClasses.map((name) => [name, document.body.classList.contains(name)])),
          wordWasFullscreen,
          singleWasFullscreen,
        };
        pendingAccessLoginReturn.surfaces.forEach(({ element }) => {
          try { element.hidden = true; } catch (_) {}
        });
        accessLoginLayoutClasses.forEach((name) => document.body.classList.remove(name));
      }

      try {
        const exitResult = document.fullscreenElement && typeof document.exitFullscreen === 'function'
          ? document.exitFullscreen()
          : null;
        if (exitResult && typeof exitResult.then === 'function') await exitResult;
      } catch (_) {}
      showAccessLoginForm();
      return true;
    }

    function restoreAccessLoginReturn() {
      const saved = pendingAccessLoginReturn;
      if (!saved) return false;
      pendingAccessLoginReturn = null;

      saved.surfaces.forEach(({ element, hidden, ariaHidden }) => {
        if (!(element instanceof HTMLElement) || !element.isConnected) return;
        try {
          element.hidden = hidden;
          if (ariaHidden === null) element.removeAttribute('aria-hidden');
          else element.setAttribute('aria-hidden', ariaHidden);
        } catch (_) {}
      });
      accessLoginLayoutClasses.forEach((name) => {
        document.body.classList.toggle(name, !!saved.bodyClasses[name]);
      });

      const wordPresenter = document.getElementById('wordPresentationPresenter');
      const singlePresenter = document.getElementById('singleExamPresenter');
      if (saved.wordWasFullscreen && wordPresenter instanceof HTMLElement) {
        wordPresenter.classList.add('is-fallback-fullscreen');
      }
      if (saved.singleWasFullscreen && singlePresenter instanceof HTMLElement) {
        singlePresenter.classList.add('single-exam-expanded');
        document.body.classList.add('single-exam-fullscreen-fallback');
      }

      try {
        const returnUrl = `${window.location.pathname}${window.location.search}${saved.hash || ''}`;
        window.history.replaceState(window.history.state, '', returnUrl);
      } catch (_) {}
      requestAnimationFrame(() => requestAnimationFrame(() => {
        try { window.scrollTo(saved.scrollX || 0, saved.scrollY || 0); } catch (_) {}
        try { window.dispatchEvent(new Event('resize')); } catch (_) {}
        setTimeout(() => {
          if (saved.activeElement instanceof HTMLElement && saved.activeElement.isConnected) {
            try { saved.activeElement.focus({ preventScroll: true }); } catch (_) {}
          }
        }, 80);
      }));
      return true;
    }

    window.mvipAccessLoginReturn = {
      begin: beginAccessLoginReturn,
      restore: restoreAccessLoginReturn,
      hasPending: () => !!pendingAccessLoginReturn,
    };

    function createLimitedPaymentContent() {
      const wrapper = document.createElement('div');
      wrapper.className = 'limited-tier-note-inner';
      const button = document.createElement('button');
      button.type = 'button';
      button.className = 'limited-tier-pay-btn';
      const paymentEnabled = !!(state.sessionInfo && state.sessionInfo.subscription_payment_enabled);
      button.disabled = !paymentEnabled;
      button.textContent = paymentEnabled ? limitedSupportMessage() : 'Thanh toán tự động chưa cấu hình';
      button.addEventListener('click', openSubscriptionModal);
      wrapper.appendChild(button);
      return wrapper;
    }

    function applyEntitlementUi() {
      const tier = String(state.sessionTier || '').trim().toLowerCase();
      const limited = tier === 'limited';
      document.body.classList.toggle('mvip-tier-limited', limited);
      if (els.subscriptionOpenBtn) {
        els.subscriptionOpenBtn.hidden = true;
        els.subscriptionOpenBtn.disabled = true;
      }
      const paymentEnabled = !!(state.sessionInfo && state.sessionInfo.subscription_payment_enabled);
      if (els.limitedMainUpgradeSlot) els.limitedMainUpgradeSlot.hidden = !(limited && !!state.token);
      if (els.limitedMainUpgradeBtn) {
        els.limitedMainUpgradeBtn.disabled = !paymentEnabled;
        els.limitedMainUpgradeBtn.textContent = paymentEnabled ? 'Nâng cấp MVIP Full' : 'Thanh toán tự động chưa cấu hình';
      }
      if (els.studentBoardLimitedNote) {
        els.studentBoardLimitedNote.hidden = !limited;
        els.studentBoardLimitedNote.textContent = '';
        if (limited) els.studentBoardLimitedNote.appendChild(createLimitedPaymentContent());
      }
      if (els.singleExamLimitedNote) {
        els.singleExamLimitedNote.hidden = !limited;
        els.singleExamLimitedNote.textContent = '';
        if (limited) els.singleExamLimitedNote.appendChild(createLimitedPaymentContent());
      }
      if (els.singleExamPresenter) {
        els.singleExamPresenter.classList.toggle('single-exam-limited-mode', limited);
      }
      if (typeof window.refreshWordPresentationAccess === 'function') {
        try { window.refreshWordPresentationAccess(); } catch (_) {}
      }
    }

    function stopSubscriptionTimers() {
      if (state.subscriptionPollTimer) {
        clearTimeout(state.subscriptionPollTimer);
        state.subscriptionPollTimer = null;
      }
      if (state.subscriptionCountdownTimer) {
        clearInterval(state.subscriptionCountdownTimer);
        state.subscriptionCountdownTimer = null;
      }
    }

    function setSubscriptionStatus(message, type = '') {
      if (!els.subscriptionStatus) return;
      els.subscriptionStatus.textContent = String(message || '');
      els.subscriptionStatus.className = `subscription-status${type ? ' ' + type : ''}`;
    }

    function subscriptionPackages() {
      const fromServer = state.sessionInfo && Array.isArray(state.sessionInfo.subscription_packages)
        ? state.sessionInfo.subscription_packages
        : [];
      const fallback = [
        { months: 1, amount: 100000, discount_percent: 0 },
        { months: 3, amount: 270000, discount_percent: 10 },
        { months: 6, amount: 480000, discount_percent: 20 },
        { months: 9, amount: 630000, discount_percent: 30 },
        { months: 12, amount: 720000, discount_percent: 40 },
      ];
      const source = fromServer.length ? fromServer : fallback;
      return source
        .map(item => ({
          months: Math.max(1, parseInt(String(item && item.months || 0), 10) || 0),
          amount: Math.max(0, Number(item && item.amount || 0)),
          discount_percent: Math.max(0, Number(item && item.discount_percent || 0)),
        }))
        .filter(item => item.months > 0 && item.amount > 0)
        .sort((a, b) => a.months - b.months);
    }

    function setSubscriptionButtonsBusy(busy, selectedMonths = 0) {
      if (!els.subscriptionPackageGrid) return;
      els.subscriptionPackageGrid.querySelectorAll('.subscription-package-btn').forEach(button => {
        button.disabled = !!busy;
        const months = parseInt(String(button.dataset.months || '0'), 10) || 0;
        button.classList.toggle('is-selected', months === Number(selectedMonths || state.subscriptionSelectedMonths || 0));
      });
    }

    function renderSubscriptionPackages() {
      if (!els.subscriptionPackageGrid) return;
      els.subscriptionPackageGrid.innerHTML = '';
      subscriptionPackages().forEach(pkg => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'subscription-package-btn';
        button.dataset.months = String(pkg.months);
        const amountText = formatVnd(pkg.amount).replace('₫', 'đ');
        button.textContent = pkg.discount_percent > 0
          ? `Gói ${pkg.months} tháng: ${amountText}, tiết kiệm ${pkg.discount_percent}%`
          : `Gói ${pkg.months} tháng: ${amountText}`;
        button.addEventListener('click', () => createSubscriptionOrder(pkg.months, button));
        els.subscriptionPackageGrid.appendChild(button);
      });
      setSubscriptionButtonsBusy(false, state.subscriptionSelectedMonths);
    }

    function resetSubscriptionDisplay() {
      state.subscriptionOrder = null;
      state.subscriptionSelectedMonths = 0;
      state.subscriptionExpiredOrderCode = '';
      if (els.subscriptionQrImage) {
        els.subscriptionQrImage.hidden = true;
        els.subscriptionQrImage.removeAttribute('src');
      }
      if (els.subscriptionPlaceholder) {
        els.subscriptionPlaceholder.hidden = false;
        els.subscriptionPlaceholder.classList.remove('success');
        els.subscriptionPlaceholder.textContent = 'Chọn một gói ở bên trái để tạo mã QR thanh toán.';
      }
      if (els.subscriptionDetails) els.subscriptionDetails.hidden = true;
      if (els.subscriptionTimeLeft) els.subscriptionTimeLeft.textContent = '-';
      setSubscriptionStatus('Chưa tạo đơn thanh toán.');
      setSubscriptionButtonsBusy(false, 0);
    }

    function openSubscriptionModal() {
      if (!state.token) {
        openAlertModal('Bạn cần đăng nhập trước khi nâng cấp tài khoản.', 'Thông báo');
        return;
      }
      if (!(state.sessionInfo && state.sessionInfo.subscription_payment_enabled)) {
        openAlertModal('Thanh toán tự động chưa được cấu hình đầy đủ trên máy chủ.', 'Thông báo');
        return;
      }
      stopSubscriptionTimers();
      resetSubscriptionDisplay();
      renderSubscriptionPackages();
      if (els.subscriptionModal) els.subscriptionModal.hidden = false;
      document.documentElement.classList.add('modal-open');
    }

    function closeSubscriptionModal() {
      stopSubscriptionTimers();
      if (els.subscriptionModal) els.subscriptionModal.hidden = true;
      document.documentElement.classList.remove('modal-open');
    }

    function subscriptionSecondsLeft(order) {
      if (!order) return 0;
      if (Number.isFinite(Number(order.seconds_left))) return Math.max(0, Number(order.seconds_left));
      const expiresMs = Date.parse(String(order.expires_at || ''));
      return Number.isFinite(expiresMs) ? Math.max(0, Math.floor((expiresMs - Date.now()) / 1000)) : 0;
    }

    function subscriptionOrderStatus(order) {
      return String((order && order.status) || '').trim().toUpperCase();
    }

    function subscriptionOrderCode(order) {
      return String((order && order.order_code) || '').trim();
    }

    function isSubscriptionOrderMarkedExpired(order) {
      const orderCode = subscriptionOrderCode(order);
      return !!orderCode && state.subscriptionExpiredOrderCode === orderCode;
    }

    function expireSubscriptionOrderUi(order = state.subscriptionOrder) {
      const currentOrder = order || state.subscriptionOrder;
      if (currentOrder) {
        const orderCode = subscriptionOrderCode(currentOrder);
        if (orderCode) state.subscriptionExpiredOrderCode = orderCode;
        currentOrder.seconds_left = 0;
        state.subscriptionOrder = currentOrder;
      }
      stopSubscriptionTimers();
      if (els.subscriptionQrImage) {
        els.subscriptionQrImage.hidden = true;
        els.subscriptionQrImage.removeAttribute('src');
      }
      if (els.subscriptionPlaceholder) {
        els.subscriptionPlaceholder.hidden = false;
        els.subscriptionPlaceholder.classList.remove('success');
        els.subscriptionPlaceholder.textContent = 'Mã QR đã hết thời gian. Hãy chọn lại một gói để tạo mã QR mới.';
      }
      if (els.subscriptionTimeLeft) els.subscriptionTimeLeft.textContent = 'Đã hết thời gian tạo đơn';
      setSubscriptionButtonsBusy(false, state.subscriptionSelectedMonths);
      setSubscriptionStatus('Mã thanh toán đã hết thời gian. Hãy tạo mã QR mới.', 'error');
    }

    function renderSubscriptionCountdown() {
      if (!state.subscriptionOrder || !els.subscriptionTimeLeft) return;
      const seconds = subscriptionSecondsLeft(state.subscriptionOrder);
      if (seconds <= 0) {
        state.subscriptionOrder.seconds_left = 0;
        els.subscriptionTimeLeft.textContent = 'Đã hết thời gian tạo đơn';
        if (subscriptionOrderStatus(state.subscriptionOrder) !== 'PAID') {
          expireSubscriptionOrderUi(state.subscriptionOrder);
        }
        return;
      }
      const minutesPart = Math.floor(seconds / 60);
      const secondsPart = seconds % 60;
      els.subscriptionTimeLeft.textContent = `${String(minutesPart).padStart(2, '0')}:${String(secondsPart).padStart(2, '0')}`;
      state.subscriptionOrder.seconds_left = Math.max(0, seconds - 1);
    }

    function renderSubscriptionOrder(order) {
      state.subscriptionOrder = order || null;
      if (!order) return;
      const status = subscriptionOrderStatus(order);
      const secondsLeft = subscriptionSecondsLeft(order);
      const expired = status === 'EXPIRED'
        || isSubscriptionOrderMarkedExpired(order)
        || (status !== 'PAID' && secondsLeft <= 0);
      const showQr = !!order.qr_url && status !== 'PAID' && !expired;

      if (els.subscriptionPlaceholder) {
        if (showQr) {
          els.subscriptionPlaceholder.hidden = true;
          els.subscriptionPlaceholder.classList.remove('success');
        } else if (expired) {
          els.subscriptionPlaceholder.hidden = false;
          els.subscriptionPlaceholder.classList.remove('success');
          els.subscriptionPlaceholder.textContent = 'Mã QR đã hết thời gian. Hãy chọn lại một gói để tạo mã QR mới.';
        } else {
          els.subscriptionPlaceholder.hidden = true;
        }
      }
      if (els.subscriptionQrImage) {
        if (showQr) {
          els.subscriptionQrImage.src = String(order.qr_url || '');
          els.subscriptionQrImage.hidden = false;
        } else {
          els.subscriptionQrImage.hidden = true;
          els.subscriptionQrImage.removeAttribute('src');
        }
      }
      if (els.subscriptionDetails) els.subscriptionDetails.hidden = false;
      if (els.subscriptionOrderCode) els.subscriptionOrderCode.textContent = String(order.order_code || '-');
      if (els.subscriptionOrderAmount) els.subscriptionOrderAmount.textContent = formatVnd(order.amount);
      if (els.subscriptionPaymentContent) els.subscriptionPaymentContent.textContent = String(order.payment_content || '-');
      if (els.subscriptionBankText) els.subscriptionBankText.textContent = String(order.bank_code || '-');
      if (els.subscriptionAccountText) els.subscriptionAccountText.textContent = String(order.account_number || '-');
      if (els.subscriptionHolderText) els.subscriptionHolderText.textContent = String(order.account_holder || '-');
      renderSubscriptionCountdown();
      if (!expired && status !== 'PAID' && !state.subscriptionCountdownTimer) {
        state.subscriptionCountdownTimer = setInterval(renderSubscriptionCountdown, 1000);
      }
    }

    function showSubscriptionPaymentSuccess(order) {
      stopSubscriptionTimers();
      state.subscriptionOrder = order || state.subscriptionOrder;
      state.subscriptionExpiredOrderCode = '';
      if (els.subscriptionQrImage) {
        els.subscriptionQrImage.hidden = true;
        els.subscriptionQrImage.removeAttribute('src');
      }
      if (els.subscriptionPlaceholder) {
        els.subscriptionPlaceholder.hidden = false;
        els.subscriptionPlaceholder.classList.add('success');
        els.subscriptionPlaceholder.innerHTML = `
          <div class="subscription-success-mark" aria-hidden="true">✓</div>
          <div class="subscription-success-title">Thanh toán thành công</div>
          <div class="subscription-success-subtitle">Thời hạn MVIP Full đã được cập nhật tự động.</div>`;
      }
      if (els.subscriptionDetails) els.subscriptionDetails.hidden = true;
      if (els.subscriptionTimeLeft) els.subscriptionTimeLeft.textContent = '-';
      setSubscriptionButtonsBusy(false, state.subscriptionSelectedMonths);
      setSubscriptionStatus('Thanh toán thành công', 'success');
    }

    async function pollSubscriptionOrder(orderCode) {
      stopSubscriptionTimers();
      const poll = async () => {
        try {
          const order = await apiGet(`/api/subscription/orders/${encodeURIComponent(orderCode)}`);
          const status = subscriptionOrderStatus(order);
          const secondsLeft = subscriptionSecondsLeft(order);
          renderSubscriptionOrder(order);
          if (status === 'PAID') {
            showSubscriptionPaymentSuccess(order);
            await refreshSessionInfo();
            renderAll();
            return;
          }
          if (status === 'EXPIRED' || secondsLeft <= 0 || isSubscriptionOrderMarkedExpired(order)) {
            expireSubscriptionOrderUi(order);
            return;
          }
          setSubscriptionStatus('Đang chờ ngân hàng và SePay xác nhận giao dịch...', 'waiting');
          state.subscriptionPollTimer = setTimeout(poll, 3000);
        } catch (error) {
          setSubscriptionStatus(`Không kiểm tra được thanh toán: ${error.message}`, 'error');
          state.subscriptionPollTimer = setTimeout(poll, 5000);
        }
      };
      await poll();
    }

    async function createSubscriptionOrder(months, sourceButton = null) {
      const selectedMonths = parseInt(String(months || 0), 10) || 0;
      if (!selectedMonths) return;
      stopSubscriptionTimers();
      state.subscriptionExpiredOrderCode = '';
      state.subscriptionSelectedMonths = selectedMonths;
      setSubscriptionButtonsBusy(true, selectedMonths);
      if (sourceButton) sourceButton.classList.add('is-selected');
      try {
        if (els.subscriptionQrImage) {
          els.subscriptionQrImage.hidden = true;
          els.subscriptionQrImage.removeAttribute('src');
        }
        if (els.subscriptionDetails) els.subscriptionDetails.hidden = true;
        if (els.subscriptionPlaceholder) {
          els.subscriptionPlaceholder.hidden = false;
          els.subscriptionPlaceholder.classList.remove('success');
          els.subscriptionPlaceholder.textContent = `Đang tạo mã QR cho gói ${selectedMonths} tháng...`;
        }
        setSubscriptionStatus(`Đang tạo đơn gói ${selectedMonths} tháng...`, 'waiting');
        const order = await apiPost('/api/subscription/orders', { months: selectedMonths });
        renderSubscriptionOrder(order);
        setSubscriptionStatus('Quét QR, kiểm tra đúng số tiền và giữ nguyên nội dung chuyển khoản.', 'waiting');
        setSubscriptionButtonsBusy(false, selectedMonths);
        await pollSubscriptionOrder(String(order.order_code || ''));
      } catch (error) {
        setSubscriptionStatus(`Không tạo được mã QR: ${error.message}`, 'error');
        if (els.subscriptionPlaceholder) {
          els.subscriptionPlaceholder.hidden = false;
          els.subscriptionPlaceholder.classList.remove('success');
          els.subscriptionPlaceholder.textContent = 'Không tạo được mã QR. Hãy chọn lại một gói.';
        }
        setSubscriptionButtonsBusy(false, selectedMonths);
      }
    }

    async function copySubscriptionContent() {
      const value = String((els.subscriptionPaymentContent && els.subscriptionPaymentContent.textContent) || '').trim();
      if (!value || value === '-') return;
      try {
        await navigator.clipboard.writeText(value);
        setSubscriptionStatus('Đã sao chép nội dung chuyển khoản.', 'success');
      } catch (_) {
        window.prompt('Sao chép nội dung chuyển khoản:', value);
      }
    }

    async function refreshSessionInfo() {
      if (!state.token) {
        state.sessionInfo = null;
        state.sessionTier = '';
        applyEntitlementUi();
        return null;
      }
      try {
        const data = await apiGet('/session/me');
        state.sessionInfo = data || null;
        state.sessionTier = String((data && data.tier) || '').trim().toLowerCase();
        applyEntitlementUi();
        return data;
      } catch (error) {
        state.sessionInfo = null;
        state.sessionTier = '';
        applyEntitlementUi();
        throw error;
      }
    }

    async function doLogin(evt) {
      if (evt && typeof evt.preventDefault === 'function') evt.preventDefault();
      clearLoginStatus();
      const username = els.username.value.trim();
      const password = els.password.value;
      if (!username || !password) {
        showLoginStatus('Bạn cần nhập đủ tên đăng nhập và mật khẩu.', 'err');
        return;
      }
      try {
        state.isLoading = true;
        els.loginBtn.disabled = true;
        els.loginBtn.textContent = 'Đang đăng nhập...';
        const response = await fetch(API_BASE + '/api/login', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({
            username,
            password,
            device_type: 'pc',
            device_name: 'MVIP Web Portal'
          })
        });
        const text = await response.text();
        let data = {};
        try { data = text ? JSON.parse(text) : {}; } catch (_) {}
        if (!response.ok) {
          throw new Error((data && data.detail) ? data.detail : `HTTP ${response.status}`);
        }
        const token = String(data.access_token || '').trim();
        if (!token) throw new Error('Không nhận được access_token từ server.');
        // Khi đổi tài khoản ngay trong một tab, đóng phiên quét và điều khiển
        // của tài khoản cũ TRƯỚC KHI gán token mới. Nếu không, remote.ws vẫn
        // OPEN với token cũ và connect(false) sẽ bỏ qua kết nối của tài khoản mới.
        disconnectRealtime();
        try { if (typeof window.mvipRemoteDisconnect === 'function') window.mvipRemoteDisconnect(); } catch (_) {}
        state.classData = {};
        state.scanHistory = {};
        state.currentMon = '';
        state.currentStudents = {};
        state.currentDroppedStudents = {};
        state.currentShortNames = {};
        state.currentLiveAnswers = {};
        state.questionFrozen = false;
        state.webClassManagerEnabled = false;
        state.examModeByMon = {};
        state.selectedExamNoByMon = {};
        state.token = token;
        state.username = username;
        state.password = password;
        saveAuth();
        setAuthUi(true);
        await refreshSessionInfo();
        await refreshWebClassManagerAccess(false);
        showLoginStatus(`Đăng nhập thành công tài khoản ${username}`, 'ok');
        await loadAllData(true);
        connectRealtime(true);
        openAlertModal('Đăng nhập thành công', 'Thông báo', {
          onOk: () => {
            if (window.mvipAccessLoginReturn && window.mvipAccessLoginReturn.restore()) return;
            const introSection = document.getElementById('gioi-thieu');
            if (introSection) introSection.scrollIntoView({ behavior: 'smooth', block: 'start' });
            setTimeout(() => {
              const firstPresentationButton = document.getElementById('introUnifiedPresentationBtn');
              if (firstPresentationButton) {
                try { firstPresentationButton.focus({ preventScroll: true }); } catch (_) {}
              }
            }, 450);
          }
        });
      } catch (error) {
        const loginError = String((error && error.message) || '').trim();
        if (loginError && /sai tài khoản hoặc mật khẩu/i.test(loginError)) {
          openAlertModal('Sai tài khoản hoặc mật khẩu', 'Thông báo');
        } else if (loginError) {
          openAlertModal(loginError, 'Thông báo');
        } else {
          openAlertModal('Đăng nhập không thành công', 'Thông báo');
        }
        doLogout(false, false, false);
      } finally {
        state.isLoading = false;
        els.loginBtn.disabled = false;
        els.loginBtn.textContent = 'Đăng nhập';
      }
    }

    function doLogout(showMessage = true, clearSavedLogin = false, preserveCurrentInputs = true) {
      state.token = '';
      state.username = '';
      state.password = '';
      state.classData = {};
      state.scanHistory = {};
      state.currentMon = '';
      state.currentStudents = {};
      state.currentDroppedStudents = {};
      state.currentShortNames = {};
      clearCurrentQuestion();
      state.selectedHistoryIndex = -1;
      state.webClassManagerEnabled = false;
      state.examModeByMon = {};
      state.selectedExamNoByMon = {};
      state.cv7991Bank = null;
      state.cv7991BankCatalog = null;
      state.cv7991BankCatalogPromise = null;
      state.cv7991BankLoadPromise = null;
      state.sessionInfo = null;
      state.sessionTier = '';
      state.subscriptionOrder = null;
      stopSubscriptionTimers();
      if (els.subscriptionModal) els.subscriptionModal.hidden = true;
      applyEntitlementUi();
      els.classSubjectSelect.innerHTML = '<option value="">Chọn Lớp-Môn</option>';
      els.classSubjectSelect.value = '';
      if (els.compactClassSubjectSelect) {
        els.compactClassSubjectSelect.innerHTML = '<option value="">Chọn Lớp-Môn</option>';
        els.compactClassSubjectSelect.value = '';
      }
      disconnectRealtime();
      try { if (typeof window.mvipRemoteDisconnect === 'function') window.mvipRemoteDisconnect(); } catch (_) {}
      closeResultDialog();
      closeReportModal();
      closeResultClassRequiredModal();
      closeClassManagerModal();
      clearAuthStorage(clearSavedLogin, preserveCurrentInputs);
      setAuthUi(false);
      setWsUi(false, 'Realtime chưa kết nối');
      setAccountNote();
      renderAll();
      if (showMessage) showLoginStatus('Bạn đã đăng xuất khỏi trang web.', 'info');
    }

    function disconnectRealtime() {
      if (state.wsRetryTimer) {
        clearTimeout(state.wsRetryTimer);
        state.wsRetryTimer = null;
      }
      if (state.ws) {
        try { state.ws.onopen = null; state.ws.onclose = null; state.ws.onmessage = null; state.ws.onerror = null; state.ws.close(); } catch (_) {}
      }
      state.ws = null;
      state.wsConnected = false;
    }

    function wsUrl() {
      const u = new URL(API_BASE);
      u.protocol = (u.protocol === 'https:') ? 'wss:' : 'ws:';
      u.pathname = '/api/ws/scan';
      u.search = '?token=' + encodeURIComponent(state.token);
      return u.toString();
    }

    function connectRealtime(force = false) {
      if (!state.token) return;
      try { if (typeof window.mvipRemoteConnect === 'function') window.mvipRemoteConnect(false); } catch (_) {}
      if (state.ws && state.ws.readyState === WebSocket.OPEN && !force) return;
      disconnectRealtime();
      try {
        const socket = new WebSocket(wsUrl());
        state.ws = socket;
        setWsUi(false, 'Realtime đang kết nối...');
        socket.onopen = () => {
          state.wsRetryCount = 0;
          setWsUi(true, 'Realtime đang kết nối');
        };
        socket.onmessage = (event) => handleWsMessage(event.data);
        socket.onerror = () => {
          setWsUi(false, 'Realtime lỗi kết nối');
        };
        socket.onclose = () => {
          state.ws = null;
          setWsUi(false, 'Realtime đã ngắt, đang thử kết nối lại...');
          if (!state.token) return;
          const delay = Math.min(12000, 1500 + (state.wsRetryCount * 1500));
          state.wsRetryCount += 1;
          state.wsRetryTimer = setTimeout(() => connectRealtime(true), delay);
        };
      } catch (error) {
        setWsUi(false, 'Realtime chưa kết nối');
      }
    }

    let liveScanUiFrame = null;
    const pendingLiveScanKeys = new Set();
    const liveScanStudentRows = new Map();

    function cancelLiveScanUi() {
      if (liveScanUiFrame !== null) cancelAnimationFrame(liveScanUiFrame);
      liveScanUiFrame = null;
      pendingLiveScanKeys.clear();
    }

    function scheduleLiveScanUi(soKey) {
      pendingLiveScanKeys.add(String(soKey));
      if (liveScanUiFrame !== null) return;
      liveScanUiFrame = requestAnimationFrame(() => {
        liveScanUiFrame = null;
        const keys = Array.from(pendingLiveScanKeys).filter((key) =>
          state.currentLiveAnswers[key] && !state.currentDroppedStudents?.[key]);
        pendingLiveScanKeys.clear();
        if (!state.currentMon || !keys.length) return;

        const wordOpen = typeof window.wordPresentationIsOpen === 'function' && window.wordPresentationIsOpen();
        if (wordOpen && typeof window.wordPresentationRefreshScanUi === 'function') {
          window.wordPresentationRefreshScanUi();
        } else if (isRegularTestSessionActive() && singleExamIsFullscreen()) {
          // Remote v26: không thoát fullscreen khi nhận thẻ. Bảng học sinh sẽ
          // phủ toàn màn hình theo 5 cột sau thẻ hợp lệ đầu tiên.
          try {
            if (typeof window.mvipRemoteMaybeShowScanOverlay === 'function') {
              window.mvipRemoteMaybeShowScanOverlay();
            }
          } catch (_) {}
        }

        // Cards are stored immediately; paint the changed students together on
        // the next frame without rebuilding the question, formulas or images.
        const canPatchRows = !state.revealAnswers && !state.examPreviewDone && keys.every((key) => {
          const row = liveScanStudentRows.get(key);
          return row && els.studentColumns.contains(row);
        });
        if (canPatchRows) {
          keys.forEach((key) => liveScanStudentRows.get(key).classList.add('scanned'));
          updateLiveScanCounters();
        } else {
          renderCurrentBoard({ scanOnly:true });
        }
        updateTopStats();
        if (!wordOpen && isRegularTestSessionActive()) updateRegularTestScanUi();
      });
    }

    function handleWsMessage(raw) {
      let msg = null;
      try { msg = JSON.parse(raw); } catch (_) { return; }
      if (!msg || typeof msg !== 'object') return;

      /* Máy chủ không gửi dữ liệu thẻ của Limited, chỉ gửi tín hiệu tối giản
         này. Xử lý trước mọi nhánh trình chiếu để thông báo xuất hiện đồng
         nhất ở màn hình chính, PowerPoint, Word, PDF và Excel. */
      if (msg.type === 'scan_restricted') {
        if (isLimitedAccount()) {
          const now = Date.now();
          const last = Number(state.lastScanRestrictedNoticeAt || 0);
          if (now - last >= 2500) {
            state.lastScanRestrictedNoticeAt = now;
            openLimitedUpgradeNotice('scan', 'limited');
          }
        }
        return;
      }

      if (msg.type === 'select') {
        // Không tự động đổi Lớp-Môn theo thiết bị quét.
        // Người dùng sẽ tự chọn bằng combo Lớp-Môn trên web.
        return;
      }

      if (msg.type !== 'scan') return;
      if (typeof window.wordPresentationIsOpen === 'function' && window.wordPresentationIsOpen()) {
        /* Bộ trình chiếu tự kiểm tra đúng Lớp-Môn, đúng học sinh
           và chỉ khi thẻ hợp lệ mới thoát fullscreen về bố cục thu nhỏ. */
        if (typeof window.wordPresentationHandleScanMessage === 'function') {
          try { window.wordPresentationHandleScanMessage(msg); } catch (_) {}
        }
        return;
      }
      if (state.questionFrozen) return;
      if (isRegularTestSessionActive()) {
        const regularSlide = currentRegularTestSlide();
        if (regularTestGroupedTfSlide(regularSlide) && !regularTestActiveTfLetter(regularSlide)) return;
      }
      const meta = (msg.meta && typeof msg.meta === 'object') ? msg.meta : {};
      let mon = String(meta.mon || meta.class_subject || meta.lop_mon || meta.lopmon || '').trim();
      const lop = String(meta.lop || '').trim();
      if (mon && lop && !mon.includes(lop)) mon = `${mon}-${lop}`;
      mon = normMonKey(mon);
      if (!mon) return;
      if (state.currentMon && mon !== state.currentMon) return;
      const soKey = resolveStudentKey(state.currentStudents, meta.so);
      const ans = String(meta.ans || '').trim().toUpperCase();
      if (!soKey || !['A', 'B', 'C', 'D'].includes(ans)) return;
      if (state.currentDroppedStudents && state.currentDroppedStudents[soKey]) return;
      if (state.currentLiveAnswers[soKey]) return;
      state.currentLiveAnswers[soKey] = {
        ans,
        ts: meta.ts || meta.time || new Date().toLocaleTimeString('vi-VN', { hour12: false })
      };
      scheduleLiveScanUi(soKey);
    }

    function clearCurrentQuestion() {
      cancelLiveScanUi();
      state.regularTestRepickPending = null;
      if (typeof window.wordPresentationClearRepickState === 'function') window.wordPresentationClearRepickState();
      state.currentLiveAnswers = {};
      state.questionFrozen = false;
      resetRevealState();
      resetExamPreviewDone();
    }

    function buildCurrentRoster() {
      const mon = normMonKey(state.currentMon);
      const obj = state.classData[mon] || {};
      const students = (obj && typeof obj.students === 'object' && obj.students) ? obj.students : {};
      const normalized = {};
      Object.keys(students).forEach((k) => {
        const key = normalizeStudentId(k) || String(k).trim();
        normalized[key] = String(students[k] || '').trim();
      });
      const shortMap = {};
      const used = new Set();
      Object.keys(normalized)
        .sort((a, b) => {
          const aa = /^\d+$/.test(a) ? parseInt(a, 10) : Number.MAX_SAFE_INTEGER;
          const bb = /^\d+$/.test(b) ? parseInt(b, 10) : Number.MAX_SAFE_INTEGER;
          if (aa !== bb) return aa - bb;
          return String(a).localeCompare(String(b), 'vi');
        })
        .forEach((so) => {
          const short = shortenName(normalized[so], used);
          shortMap[so] = short;
          if (short) used.add(short);
        });
      state.currentStudents = normalized;
      state.currentDroppedStudents = normalizeDroppedStudents(obj.droppedStudents, normalized);
      state.currentShortNames = shortMap;
      clearCurrentQuestion();
      state.selectedHistoryIndex = -1;
      renderDetail(null);
    }

    function sortedStudentKeys() {
      return Object.keys(state.currentStudents || {}).sort((a, b) => {
        const aa = /^\d+$/.test(a) ? parseInt(a, 10) : Number.MAX_SAFE_INTEGER;
        const bb = /^\d+$/.test(b) ? parseInt(b, 10) : Number.MAX_SAFE_INTEGER;
        if (aa !== bb) return aa - bb;
        return String(a).localeCompare(String(b), 'vi');
      });
    }

    function currentHistoryList() {
      const mon = normMonKey(state.currentMon);
      const hist = state.scanHistory[mon];
      return Array.isArray(hist) ? hist : [];
    }

    function setAccountNote() {
      if (!els.accountDataNote) return;
      if (state.token && state.username) {
        els.accountDataNote.style.display = 'block';
        const classCount = Object.keys(state.classData || {}).length;
        els.accountDataNote.textContent = `Đang nạp / hiển thị dữ liệu của tài khoản: ${state.username}${classCount ? ` · ${classCount} Lớp-Môn` : ''}`;
      } else {
        els.accountDataNote.style.display = 'none';
        els.accountDataNote.textContent = '';
      }
    }

    function showResultDialog(correct, correctCnt, answered, opts = {}) {
      const regularTest = !!(opts && opts.regularTest);
      const wordPresentation = !!(opts && opts.wordPresentation);
      const hasGuide = regularTest && currentRegularTestSlideHasGuide();
      state.pendingResult = Object.assign({}, opts || {}, {
        correct,
        correctCnt,
        answered,
        regularTest,
        wordPresentation
      });
      const pct = answered > 0 ? Math.round((correctCnt / answered) * 100) : 0;
      const correctLabel = String((opts && opts.correctLabel) || correct || '-');
      els.resultCorrectBadge.textContent = correctLabel;
      els.resultRateText.textContent = `Tỷ lệ đúng: ${correctCnt}/${answered} = ${pct}%`;
      if (els.resultRepickBtn) {
        // Bản thử nghiệm v44: bỏ hoàn toàn nút Chọn lại khỏi mọi bảng Kết quả câu hỏi.
        els.resultRepickBtn.hidden = true;
        els.resultRepickBtn.style.display = 'none';
      }
      if (els.singleExamGuideBtn) {
        // Chỉ hiện khi câu đang trình chiếu thực sự có nội dung "Hướng dẫn giải".
        els.singleExamGuideBtn.hidden = !hasGuide;
        els.singleExamGuideBtn.disabled = !hasGuide;
        els.singleExamGuideBtn.title = hasGuide
          ? 'Xem hướng dẫn giải của câu hiện tại'
          : 'Câu hiện tại không có hướng dẫn giải';
      }
      els.resultModal.classList.toggle('is-word-question-result', wordPresentation);
      els.resultModal.hidden = false;
      document.body.style.overflow = 'hidden';
    }

    function closeResultDialog() {
      els.resultModal.hidden = true;
      els.resultModal.classList.remove('is-word-question-result');
      document.body.style.overflow = '';
      if (els.resultRepickBtn) { els.resultRepickBtn.hidden = true; els.resultRepickBtn.style.display = 'none'; }
      if (els.singleExamGuideBtn) {
        els.singleExamGuideBtn.hidden = true;
        els.singleExamGuideBtn.disabled = false;
      }
      state.pendingResult = null;
    }

    async function saveCurrentQuestion(correct) {
      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Chưa chọn Lớp-Môn.');
      const answers = {};
      let answered = 0;
      let correctCnt = 0;
      Object.keys(state.currentStudents || {}).forEach((so) => {
        const live = state.currentLiveAnswers[so] || null;
        const ans = String((live && live.ans) || '').toUpperCase();
        if (['A','B','C','D'].includes(ans)) {
          answers[String(so)] = ans;
          answered += 1;
          if (ans === correct) correctCnt += 1;
        }
      });
      if (!answered) throw new Error('Chưa có học sinh trả lời.');

      const hist = Array.isArray(state.scanHistory[mon]) ? [...state.scanHistory[mon]] : [];
      const qNo = currentQuestionNo('normal');
      const tsIso = new Date().toISOString().slice(0, 19);
      hist.push({
        q: qNo,
        ts: tsIso,
        date: tsIso.split('T')[0],
        correct,
        answered,
        correct_cnt: correctCnt,
        answers
      });
      state.scanHistory[mon] = hist;
      await apiPut('/api/scan-history', { data: state.scanHistory });
      clearCurrentQuestion();
      state.selectedHistoryIndex = hist.length - 1;
      renderAll();
      renderDetail(hist[hist.length - 1]);
      showLoginStatus(`Đã lưu kết quả câu ${formatQuestionNumber(qNo)} của ${mon}.`, 'ok');
    }

    async function finishCurrentQuestionByExamCodes() {
      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Chưa chọn Lớp-Môn.');
      const cfg = currentExamConfig();
      if (!isAutoExamMode()) {
        throw new Error('Bạn chưa tích chọn chế độ chấm theo mã đề.');
      }
      if (!cfg.enabled || !cfg.codeOrder.length || cfg.questionCount < 1) {
        throw new Error('Lớp-Môn này chưa có đề trắc nghiệm hợp lệ.');
      }
      const hist = Array.isArray(state.scanHistory[mon]) ? [...state.scanHistory[mon]] : [];
      const examNo = currentExamSerial(mon);
      if (!examNo) throw new Error('Bạn chọn đề số trước khi chấm theo mã đề.');
      const qNo = currentQuestionNo('exam');
      if (qNo > cfg.questionCount) {
        throw new Error(`Đã hết số câu cấu hình (${cfg.questionCount} câu).`);
      }
      const answers = {};
      const expectedByStudent = {};
      const codeByStudent = {};
      const labelByStudent = {};
      const codeCorrectMap = {};
      cfg.codeOrder.forEach((code) => {
        codeCorrectMap[code] = String((cfg.answerKeys[code] || [])[qNo - 1] || '').trim().toUpperCase();
      });
      let answered = 0;
      let correctCnt = 0;
      Object.keys(state.currentStudents || {}).forEach((so) => {
        const code = studentCodeForConfig(cfg, so);
        const expected = expectedAnswerForStudentFromConfig(cfg, so, qNo);
        const scanLabel = scanQuestionLabelForStudentFromConfig(cfg, so, qNo);
        if (code) codeByStudent[String(so)] = code;
        if (scanLabel) labelByStudent[String(so)] = scanLabel;
        if (expected) expectedByStudent[String(so)] = expected;
        const live = state.currentLiveAnswers[so] || null;
        const ans = String((live && live.ans) || '').toUpperCase();
        if (['A', 'B', 'C', 'D'].includes(ans)) {
          answers[String(so)] = ans;
          answered += 1;
          if (expected && isCorrectAnswerForScoreItem(ans, expected, scoreItemForLiveExam(cfg, so, qNo))) correctCnt += 1;
        }
      });
      if (!answered) throw new Error('Chưa có học sinh trả lời.');

      const tsIso = new Date().toISOString().slice(0, 19);
      hist.push({
        q: qNo,
        ts: tsIso,
        date: tsIso.split('T')[0],
        mode: 'multi_code',
        exam_no: examNo,
        exam_uid: String((cfg && cfg.examUid) || '').trim(),
        q_label: scanQuestionLabelFromConfig(cfg, qNo),
        q_label_by_student: labelByStudent,
        correct: '',
        correct_label: 'Theo mã đề',
        answered,
        correct_cnt: correctCnt,
        answers,
        expected_by_student: expectedByStudent,
        code_by_student: codeByStudent,
        code_correct_map: codeCorrectMap,
        question_count: cfg.questionCount,
        exam_name: String((cfg && cfg.name) || '').trim(),
        scoringConfig: scoringSnapshotForExamConfig(cfg)
      });
      state.scanHistory[mon] = hist;
      await apiPut('/api/scan-history', { data: state.scanHistory });
      clearCurrentQuestion();
      state.selectedHistoryIndex = hist.length - 1;
      renderAll();
      renderDetail(hist[hist.length - 1]);
      const currentScanLabel = scanQuestionLabelFromConfig(cfg, qNo);
      showLoginStatus(`Đã chấm và lưu câu ${currentScanLabel} của ${mon} theo mã đề số ${examNo}.`, 'ok');
    }

    function singleExamTextHtml(value) {
      return escapeHtml(String(value || '')).replace(/\n/g, '<br>');
    }

    function singleExamOptionHtmlValue(opt) {
      const raw = String(opt && opt.html || '') || singleExamTextHtml(opt && opt.text || '');
      return String(raw || '')
        .replace(/^(?:\s|<br\s*\/?>|&nbsp;)+/gi, '')
        .replace(/<p\b([^>]*)>/gi, '<span$1>')
        .replace(/<\/p>/gi, '</span>')
        .replace(/<div\b([^>]*)>/gi, '<span$1>')
        .replace(/<\/div>/gi, '</span>');
    }

    function cv7991RegularChoiceCheckHtml(letterValue, selected = false) {
      const letter = String(letterValue || '').trim();
      const safeLetter = escapeHtml(letter);
      const active = !!selected;
      return `<button type="button" class="cv7991-choice-check-btn${active ? ' is-checked' : ''}" aria-pressed="${active ? 'true' : 'false'}" aria-label="${active ? 'Bỏ tích chọn' : 'Tích chọn'} ${safeLetter}" title="${active ? 'Bỏ tích chọn' : 'Tích chọn'}"><span aria-hidden="true">✓</span></button>`;
    }

    function cv7991RegularTfChoiceHtml(letterValue, markValue = '') {
      const letter = String(letterValue || '').trim();
      const safeLetter = escapeHtml(letter);
      const mark = String(markValue || '').trim().toUpperCase();
      return `<span class="cv7991-tf-choice-group" role="group" aria-label="Chọn Đúng hoặc Sai cho ý ${safeLetter}">
        <button type="button" class="cv7991-tf-choice-btn is-true${mark === 'Đ' ? ' is-checked' : ''}" data-tf-choice="Đ" aria-pressed="${mark === 'Đ' ? 'true' : 'false'}" aria-label="Chọn Đúng cho ý ${safeLetter}" title="Đúng">Đ</button>
        <button type="button" class="cv7991-tf-choice-btn is-false${mark === 'S' ? ' is-checked' : ''}" data-tf-choice="S" aria-pressed="${mark === 'S' ? 'true' : 'false'}" aria-label="Chọn Sai cho ý ${safeLetter}" title="Sai">S</button>
      </span>`;
    }

    function regularTestSyncChoiceCheck(row, active) {
      if (!(row instanceof Element)) return;
      const button = row.querySelector('.cv7991-choice-check-btn');
      if (!(button instanceof HTMLElement)) return;
      const selected = !!active;
      button.classList.toggle('is-checked', selected);
      button.setAttribute('aria-pressed', selected ? 'true' : 'false');
      const letter = String(row.getAttribute('data-letter') || '').trim();
      button.setAttribute('aria-label', `${selected ? 'Bỏ tích chọn' : 'Tích chọn'} ${letter}`.trim());
      button.title = selected ? 'Bỏ tích chọn' : 'Tích chọn';
    }

    function regularTestSyncTfChoice(row, markValue = '') {
      if (!(row instanceof Element)) return;
      const mark = String(markValue || '').trim().toUpperCase();
      row.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]').forEach((button) => {
        const value = String(button.getAttribute('data-tf-choice') || '').trim().toUpperCase();
        const active = value === mark;
        button.classList.toggle('is-checked', active);
        button.setAttribute('aria-pressed', active ? 'true' : 'false');
      });
      row.setAttribute('aria-pressed', mark ? 'true' : 'false');
    }

    function singleExamWordCardHtml(item, qNo) {
      const options = Array.isArray(item && item.options) && item.options.length
        ? item.options.slice(0, 4)
        : ['A', 'B', 'C', 'D'].map((letter) => ({ letter, text: `Phương án ${letter}` }));
      const format = regularTestWordQuestionFormat(item);
      const canCheck = format === 'mc' || format === 'tf';
      const manualSelected = regularTestManualSelectionSet(item);
      const manualTfMarks = regularTestManualTfMarkMap(item);
      const optionCellHtml = (opt, index) => {
        const rawLetter = String(opt && opt.letter || '').toUpperCase();
        const letterKey = rawLetter.toLowerCase();
        const selected = format === 'mc' && manualSelected.has(letterKey);
        const tfMark = format === 'tf' ? String(manualTfMarks[letterKey] || '') : '';
        const choiceHtml = format === 'tf'
          ? cv7991RegularTfChoiceHtml(rawLetter, tfMark)
          : (format === 'mc' ? cv7991RegularChoiceCheckHtml(rawLetter, selected) : '');
        return `
        <div class="single-exam-word-option${canCheck ? ' cv7991-has-choice-check' : ''}${selected ? ' is-manual-selected' : ''}" data-option-index="${index}" data-letter="${escapeHtml(rawLetter)}" aria-pressed="${selected || !!tfMark ? 'true' : 'false'}">
          <span class="single-exam-word-option-label">${escapeHtml(rawLetter)}.</span>
          <div class="single-exam-word-option-body"><div class="single-exam-word-option-flow">${singleExamOptionHtmlValue(opt)}</div></div>
          ${choiceHtml}
        </div>`;
      };
      const optionCellsHtml = options.map(optionCellHtml).join('');
      const promptHtml = String(item && item.promptHtml || '') || singleExamTextHtml(item && item.prompt || '');
      const layoutHint = [1, 2, 4].includes(Number(item && item.optionLayoutColumns)) ? Number(item.optionLayoutColumns) : 0;
      return `<div class="single-exam-word-card" data-option-layout="${layoutHint}">
        <div class="single-exam-word-question"><span class="single-exam-word-question-label">Câu ${singleExamTextHtml(item && (item.displayNumber || item.label) || qNo)}.</span><span>${promptHtml}</span></div>
        <div class="single-exam-word-options">${optionCellsHtml}</div>
      </div>`;
    }

    function singleExamSlideInnerHtml(item, qNo) {
      const options = Array.isArray(item && item.options) && item.options.length
        ? item.options
        : ['A', 'B', 'C', 'D'].map((letter) => ({ letter, text: `Phương án ${letter}` }));
      const format = regularTestWordQuestionFormat(item);
      const canCheck = format === 'mc' || format === 'tf';
      const manualSelected = regularTestManualSelectionSet(item);
      const manualTfMarks = regularTestManualTfMarkMap(item);
      const optionHtml = options.slice(0, 4).map((opt) => {
        const rawLetter = String(opt && opt.letter || '').toUpperCase();
        const letterKey = rawLetter.toLowerCase();
        const selected = format === 'mc' && manualSelected.has(letterKey);
        const tfMark = format === 'tf' ? String(manualTfMarks[letterKey] || '') : '';
        const choiceHtml = format === 'tf'
          ? cv7991RegularTfChoiceHtml(rawLetter, tfMark)
          : (format === 'mc' ? cv7991RegularChoiceCheckHtml(rawLetter, selected) : '');
        return `
        <div class="single-exam-option${canCheck ? ' cv7991-has-choice-check' : ''}${selected ? ' is-manual-selected' : ''}" data-letter="${escapeHtml(rawLetter)}" aria-pressed="${selected || !!tfMark ? 'true' : 'false'}">
          <span><b>${escapeHtml(rawLetter)}.</b> <span class="single-exam-rich">${singleExamOptionHtmlValue(opt)}</span></span>
          ${choiceHtml}
        </div>`;
      }).join('');
      const promptHtml = String(item && item.promptHtml || '') || singleExamTextHtml(item && item.prompt || '');
      const displayNumber = singleExamTextHtml(item && (item.displayNumber || item.label) || qNo);
      return `
        <div class="single-exam-question-box"><div class="single-exam-question-content"><span class="single-exam-question-prefix">Câu&nbsp;${displayNumber}:</span>&nbsp;<span class="single-exam-rich">${promptHtml}</span></div></div>
        <div class="single-exam-options-grid">${optionHtml}</div>`;
    }

    function ensureSingleExamCaptureStage() {
      let stage = document.getElementById('singleExamCaptureStage');
      if (stage) return stage;
      stage = document.createElement('div');
      stage.id = 'singleExamCaptureStage';
      stage.className = 'single-exam-capture-stage';
      document.body.appendChild(stage);
      return stage;
    }

    function html2canvasReady() {
      if (window.html2canvas) return Promise.resolve(window.html2canvas);
      return new Promise((resolve, reject) => {
        let ticks = 0;
        const timer = setInterval(() => {
          if (window.html2canvas) {
            clearInterval(timer);
            resolve(window.html2canvas);
          } else if (ticks++ > 80) {
            clearInterval(timer);
            reject(new Error('Chưa tải được thư viện chụp ảnh câu hỏi.'));
          }
        }, 150);
      });
    }

    async function cv7991WaitForCardMedia(root) {
      try {
        if (document.fonts && document.fonts.ready) await document.fonts.ready;
      } catch (_) {}
      const images = Array.from(root && root.querySelectorAll ? root.querySelectorAll('img') : []);
      await Promise.all(images.map((img) => {
        if (img.complete && img.naturalWidth > 0) return Promise.resolve();
        return new Promise((resolve) => {
          let done = false;
          const finish = () => { if (done) return; done = true; resolve(); };
          img.addEventListener('load', finish, { once: true });
          img.addEventListener('error', finish, { once: true });
          setTimeout(finish, 3500);
        });
      }));
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
    }

    function cv7991VisualTextLineCount(container) {
      if (!(container instanceof Element)) return 0;
      const visibleBreak = Array.from(container.querySelectorAll('br')).some((br) => {
        try { return getComputedStyle(br).display !== 'none'; } catch (_) { return true; }
      });
      if (visibleBreak) return 2;

      const rects = [];
      try {
        const walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT, {
          acceptNode(node) {
            const value = String(node && node.nodeValue || '').replace(/\u00a0/g, ' ').trim();
            if (!value) return NodeFilter.FILTER_REJECT;
            const parent = node.parentElement;
            // Sup/sub are part of the same visual line and must not create a false second line.
            if (parent && parent.closest('sup,sub')) return NodeFilter.FILTER_REJECT;
            return NodeFilter.FILTER_ACCEPT;
          }
        });
        let node;
        while ((node = walker.nextNode())) {
          const range = document.createRange();
          range.selectNodeContents(node);
          Array.from(range.getClientRects()).forEach((rect) => {
            if (rect && rect.width > 0.5 && rect.height > 0.5) rects.push(rect);
          });
          try { range.detach(); } catch (_) {}
        }
      } catch (_) {}

      if (!rects.length) {
        const hasVisual = !!container.querySelector(
          '.single-exam-inline-formula, .single-exam-inline-vector, img, svg, canvas, math'
        );
        return hasVisual || String(container.textContent || '').trim() ? 1 : 0;
      }

      let fontSize = 24;
      try { fontSize = parseFloat(getComputedStyle(container).fontSize) || fontSize; } catch (_) {}
      const tolerance = Math.max(2.5, fontSize * 0.24);
      const centers = [];
      rects.sort((a, b) => a.top - b.top || a.left - b.left).forEach((rect) => {
        const center = rect.top + rect.height / 2;
        const existing = centers.findIndex((value) => Math.abs(value - center) <= tolerance);
        if (existing < 0) centers.push(center);
        else centers[existing] = (centers[existing] + center) / 2;
      });
      return centers.length;
    }

    function cv7991OptionNeedsVisibleVerticalCenter(option) {
      if (!(option instanceof Element)) return false;
      if (option.classList.contains('single-exam-word-option')) return true;
      if (!option.classList.contains('word-presentation-item')) return false;
      const group = option.closest('.word-presentation-items');
      // Câu Đúng–Sai và các ý tự luận cần giữ cách căn riêng ở đầu hàng.
      return !(group && (group.classList.contains('is-statements')
        || group.classList.contains('is-essay-parts')));
    }

    function cv7991FormulaVisibleVerticalBounds(element) {
      if (!(element instanceof Element)) return null;
      const rect = element.getBoundingClientRect();
      if (!(rect && rect.width > 0.5 && rect.height > 0.5)) return null;

      let contentTop = rect.top;
      let contentHeight = rect.height;
      try {
        const intrinsicRatio = (typeof cv7991MathTypeElementIntrinsicRatio === 'function')
          ? Number(cv7991MathTypeElementIntrinsicRatio(element)) || 0 : 0;
        const boxRatio = rect.width / Math.max(1, rect.height);
        // object-fit:contain có thể tạo dải trắng ở trên/dưới hộp công thức.
        if (intrinsicRatio > 0 && intrinsicRatio > boxRatio) {
          contentHeight = rect.width / intrinsicRatio;
          contentTop += Math.max(0, (rect.height - contentHeight) / 2);
        }
      } catch (_) {}

      let topPaddingRatio = 0;
      let bottomPaddingRatio = 0;
      try {
        const metrics = (typeof cv7991MeasureFormulaInkMetrics === 'function')
          ? cv7991MeasureFormulaInkMetrics(element) : null;
        topPaddingRatio = Math.max(0, Math.min(.48,
          Number(metrics && metrics.topPaddingRatio) || 0));
        bottomPaddingRatio = Math.max(0, Math.min(.48,
          Number(metrics && metrics.bottomPaddingRatio) || 0));
      } catch (_) {}

      const top = contentTop + contentHeight * topPaddingRatio;
      const bottom = contentTop + contentHeight * (1 - bottomPaddingRatio);
      return bottom > top ? { top, bottom } : { top: rect.top, bottom: rect.bottom };
    }

    function cv7991CenterOptionVisibleContent(option) {
      if (!cv7991OptionNeedsVisibleVerticalCenter(option)) return;
      const flow = option.querySelector('.single-exam-word-option-flow, .word-presentation-item-flow');
      if (!(flow instanceof HTMLElement)) return;

      // Hàm được gọi nhiều lần trong quá trình co giãn. Luôn bỏ độ dịch cũ trước
      // khi đo để kết quả không cộng dồn qua từng lượt bố trí.
      flow.style.setProperty('transform', 'translateY(0px)', 'important');
      flow.style.setProperty('transform-origin', 'left center', 'important');
      delete flow.dataset.visibleCenterOffset;

      const bounds = [];
      try {
        const walker = document.createTreeWalker(flow, NodeFilter.SHOW_TEXT, {
          acceptNode(node) {
            const value = String(node && node.nodeValue || '').replace(/\u00a0/g, ' ').trim();
            if (!value) return NodeFilter.FILTER_REJECT;
            const parent = node.parentElement;
            if (!parent) return NodeFilter.FILTER_REJECT;
            // Công thức/SVG được đo theo phần nét ở bước riêng bên dưới.
            if (parent.closest('.single-exam-inline-formula, .single-exam-mathjax-equation, math, svg')) {
              return NodeFilter.FILTER_REJECT;
            }
            return NodeFilter.FILTER_ACCEPT;
          }
        });
        let node;
        while ((node = walker.nextNode())) {
          const range = document.createRange();
          range.selectNodeContents(node);
          Array.from(range.getClientRects()).forEach((rect) => {
            if (rect && rect.width > .5 && rect.height > .5) {
              bounds.push({ top: rect.top, bottom: rect.bottom });
            }
          });
          try { range.detach(); } catch (_) {}
        }
      } catch (_) {}

      const formulaSelector = [
        '.single-exam-inline-formula',
        '.single-exam-mathjax-equation',
        'math'
      ].join(',');
      Array.from(flow.querySelectorAll(formulaSelector)).forEach((element) => {
        const formulaBounds = element.classList && element.classList.contains('single-exam-inline-formula')
          ? cv7991FormulaVisibleVerticalBounds(element)
          : (() => {
              const rect = element.getBoundingClientRect();
              return rect && rect.height > .5 ? { top: rect.top, bottom: rect.bottom } : null;
            })();
        if (formulaBounds) bounds.push(formulaBounds);
      });

      if (!bounds.length) return;
      const visualTop = Math.min(...bounds.map((item) => item.top));
      const visualBottom = Math.max(...bounds.map((item) => item.bottom));
      if (!(visualBottom > visualTop)) return;

      const optionRect = option.getBoundingClientRect();
      const style = getComputedStyle(option);
      const paddingTop = parseFloat(style.paddingTop) || 0;
      const paddingBottom = parseFloat(style.paddingBottom) || 0;
      const innerTop = optionRect.top + paddingTop;
      const innerBottom = optionRect.bottom - paddingBottom;
      if (!(innerBottom > innerTop)) return;

      const targetCenter = (innerTop + innerBottom) / 2;
      const visualCenter = (visualTop + visualBottom) / 2;
      let offset = targetCenter - visualCenter;

      // Không cho phần nét nhìn thấy vượt khỏi vùng trong của ô.
      const minOffset = innerTop - visualTop;
      const maxOffset = innerBottom - visualBottom;
      offset = Math.max(minOffset, Math.min(maxOffset, offset));
      if (Math.abs(offset) < .35) offset = 0;
      offset = Math.round(offset * 100) / 100;

      flow.style.setProperty('transform', `translateY(${offset}px)`, 'important');
      flow.dataset.visibleCenterOffset = String(offset);
    }

    function cv7991RefreshSingleLineOptionClasses(root) {
      if (root instanceof Element && root.classList.contains('cv7991-source-question-layout')) return;
      if (!(root instanceof Element) && root !== document) return;
      const options = Array.from(root.querySelectorAll(
        '.single-exam-word-option, .word-presentation-item'
      ));
      options.forEach((option) => {
        option.classList.remove('is-single-visual-line');
        const flow = option.querySelector('.single-exam-word-option-flow, .word-presentation-item-flow');
        if (flow instanceof HTMLElement) {
          flow.style.setProperty('transform', 'translateY(0px)', 'important');
          delete flow.dataset.visibleCenterOffset;
        }
      });
      // Removing the class may change line boxes; the following reads intentionally force layout.
      options.forEach((option) => {
        const content = option.querySelector(
          '.single-exam-word-option-flow, .word-presentation-item-flow, '
          + '.single-exam-word-option-body, .word-presentation-item-content'
        );
        if (!(content instanceof Element)) return;
        const lineCount = cv7991VisualTextLineCount(content);
        const contentRect = content.getBoundingClientRect();
        const optionRect = option.getBoundingClientRect();
        const horizontallyContained = contentRect.right <= optionRect.right + 1.5;
        option.classList.toggle('is-single-visual-line', lineCount <= 1 && horizontallyContained);
      });
      // MathType có hộp dòng cao nhưng phần nét nằm gần đáy. Căn theo hợp của phần
      // nét chữ và công thức, không căn theo hộp ảnh trong suốt của MathType.
      options.forEach(cv7991CenterOptionVisibleContent);
    }

    async function cv7991RenderSingleExamSlideImage(item, qNo) {
      const html2canvas = await html2canvasReady();
      const stage = ensureSingleExamCaptureStage();
      stage.innerHTML = singleExamWordCardHtml(item, qNo);
      const cardEl = stage.querySelector('.single-exam-word-card') || stage;
      await cv7991WaitForCardMedia(cardEl);

      const questionEl = cardEl.querySelector('.single-exam-word-question');
      const optionsEl = cardEl.querySelector('.single-exam-word-options');
      const optionEls = Array.from(cardEl.querySelectorAll('.single-exam-word-option'));
      const optionBodyEls = Array.from(cardEl.querySelectorAll('.single-exam-word-option-body'));
      const formulaEls = Array.from(cardEl.querySelectorAll('.single-exam-inline-formula'));
      const wordGroupEls = Array.from(cardEl.querySelectorAll('.single-exam-word-group-figure'));
      const optionLayoutHint = [1, 2, 4].includes(Number(item && item.optionLayoutColumns))
        ? Number(item.optionLayoutColumns)
        : ([1, 2, 4].includes(Number(cardEl.dataset.optionLayout)) ? Number(cardEl.dataset.optionLayout) : 0);
      const promptPlain = String(questionEl && questionEl.textContent || '').replace(/\s+/g, ' ').trim();
      const optionTexts = optionBodyEls.map((el) => String(el.textContent || '').replace(/\s+/g, ' ').trim());
      const longestOptionText = optionTexts.reduce((max, txt) => Math.max(max, txt.length), 0);
      const totalOptionTextLength = optionTexts.reduce((sum, txt) => sum + txt.length, 0);
      const hasMathFormula = formulaEls.length > 0 || !!cardEl.querySelector(
        'math,mrow,mfrac,msup,msub,msubsup,.single-exam-frac,.single-exam-rad,'
        + '.mvip-ordinary-mathtype-text-symbol,.mvip-ordinary-mathtype-text-expression,'
        + '.mvip-ordinary-mathtype-equation'
      );
      const figureCandidates = questionEl
        ? Array.from(questionEl.querySelectorAll('.single-exam-inline-media:not(.single-exam-inline-formula), .single-exam-inline-vector, .single-exam-inline-table, canvas, table'))
        : [];
      const figureEls = figureCandidates.filter((el) => {
        if (!el) return false;
        if (el.classList && el.classList.contains('single-exam-inline-formula')) return false;
        if (el.closest && el.closest('.single-exam-inline-formula')) return false;
        /* Ảnh nhỏ ở nguyên vị trí token; không đưa nó vào panel cùng ảnh lớn. */
        if (el.classList && el.classList.contains('cv7991-word-small-flow-image')) return false;
        if (el.closest && el.closest('.cv7991-word-small-flow-image')) return false;
        // Nhóm bảng biến thiên phải giữ nguyên vị trí giữa các dòng văn bản của câu hỏi,
        // không bị kéo sang ô hình bên phải như ảnh/đồ thị thông thường.
        if (el.classList && el.classList.contains('single-exam-word-group-figure')) return false;
        if (el.closest && el.closest('.single-exam-word-group-figure')) return false;
        if (el.tagName === 'SVG' && el.closest('.single-exam-inline-vector')) return false;
        return true;
      });
      const sourceWordMedia = Array.from(cardEl.querySelectorAll(
        '.single-exam-inline-media:not(.single-exam-inline-formula), '
        + '.single-exam-inline-vector:not(.single-exam-inline-formula), '
        + '.single-exam-inline-table, canvas'
      )).filter((element) => {
        if (!(element instanceof Element)) return false;
        if (element.closest('.single-exam-inline-formula')) return false;
        return true;
      }).filter((element, index, list) => !list.some((other, otherIndex) =>
        otherIndex < index && other.contains(element)
      ));
      const smallFlowImages = sourceWordMedia.filter((element) =>
        element.classList.contains('cv7991-word-small-flow-image')
      );
      cardEl.classList.toggle('cv7991-word-source-media-flow', smallFlowImages.length > 0);
      const scaleSourceMediaWithText = (elements) => {
        const fallbackSourceFontPx = 16; // 12 pt trong Word tương đương 16 px CSS.
        Array.from(elements || []).forEach((element) => {
          if (!(element instanceof HTMLElement)) return;
          if (element.matches('table, .single-exam-inline-table') || element.querySelector('table, .single-exam-inline-table')) return;
          const wordCharacterPt = parseFloat(element.style.getPropertyValue('--cv-word-character-height-pt')) || 0;
          const sourceFontPx = element.classList.contains('cv7991-word-small-flow-image') && wordCharacterPt > 0
            ? wordCharacterPt * 96 / 72
            : fallbackSourceFontPx;
          let baseWidth = Number(element.dataset.cv7991WordBaseWidthPx) || 0;
          let baseHeight = Number(element.dataset.cv7991WordBaseHeightPx) || 0;
          if (!(baseWidth > 0)) {
            baseWidth = parseFloat(element.style.getPropertyValue('--cv-presenter-base-width'))
              || parseFloat(element.style.width) || 0;
            if (baseWidth > 0) element.dataset.cv7991WordBaseWidthPx = String(baseWidth);
          }
          if (!(baseHeight > 0)) {
            baseHeight = parseFloat(element.style.getPropertyValue('--cv-presenter-base-height'))
              || parseFloat(element.style.height) || 0;
            if (baseHeight > 0) element.dataset.cv7991WordBaseHeightPx = String(baseHeight);
          }
          if (baseWidth > 0) element.style.width = `${Math.round(baseWidth / sourceFontPx * 100000) / 100000}em`;
          if (baseHeight > 0) element.style.height = `${Math.round(baseHeight / sourceFontPx * 100000) / 100000}em`;
        });
      };
      if (smallFlowImages.length) scaleSourceMediaWithText(smallFlowImages);
      const hasFigureMedia = figureEls.length > 0;
      const isTableFigure = (el) => !!(el && (el.matches && el.matches('table, .single-exam-inline-table')) || (el.querySelector && el.querySelector('table')));
      // Các ảnh lớn còn lại giữ đúng thứ tự nguồn khi đưa vào panel bản 34.
      const orderedFigureEls = figureEls.slice();
      const getDisplayedTableSize = (el) => {
        const tbl = el && (el.matches && el.matches('table') ? el : (el.querySelector ? el.querySelector('table') : null));
        if (!tbl) return { width: 0, height: 0, area: 0 };

        // Phân loại theo kích thước THỰC TẾ đang được trình duyệt vẽ trên màn chiếu,
        // không dựa vào số hàng/cột hoặc kích thước gốc lưu trong tệp Word.
        const visualEl = el && el.getBoundingClientRect ? el : tbl;
        const rect = visualEl.getBoundingClientRect();
        let width = Number(rect && rect.width) || 0;
        let height = Number(rect && rect.height) || 0;
        if (!(width > 0)) width = Number(visualEl.offsetWidth || visualEl.clientWidth || tbl.offsetWidth || tbl.clientWidth) || 0;
        if (!(height > 0)) height = Number(visualEl.offsetHeight || visualEl.clientHeight || tbl.offsetHeight || tbl.clientHeight) || 0;
        return { width, height, area: Math.max(0, width) * Math.max(0, height) };
      };
      const hasTableMedia = figureEls.some((el) => isTableFigure(el));
      const displayedTableSize = hasTableMedia
        ? figureEls
            .filter((el) => isTableFigure(el))
            .map(getDisplayedTableSize)
            .reduce((best, cur) => (cur.area > best.area ? cur : best), { width: 0, height: 0, area: 0 })
        : { width: 0, height: 0, area: 0 };
      // Bảng ngang: chiều rộng thực tế > chiều cao thực tế.
      // Bảng dọc: chiều rộng thực tế <= chiều cao thực tế.
      const hasHorizontalTable = hasTableMedia && displayedTableSize.width > displayedTableSize.height;
      const hasVerticalTable = hasTableMedia && !hasHorizontalTable;
      const hasImageLikeFigureMedia = figureEls.some((el) => !isTableFigure(el));
      const hasRichMedia = hasMathFormula || hasFigureMedia || !!cardEl.querySelector('img,svg,canvas,table,.single-exam-inline-vector,.single-exam-inline-media,.single-exam-inline-table');

      let mediaPanel = null;
      if (hasFigureMedia && questionEl) {
        mediaPanel = document.createElement('div');
        mediaPanel.className = 'single-exam-word-media-panel';
        cardEl.appendChild(mediaPanel);
        Object.assign(mediaPanel.style, {
          boxSizing: 'border-box',
          overflow: 'hidden',
          display: 'flex',
          alignItems: 'flex-end',
          justifyContent: 'flex-end',
          padding: '6px',
          background: '#fff',
        });
        /* Giữ nguyên thứ tự nguồn Word khi đưa các phương tiện vào panel. */
        orderedFigureEls.forEach((el) => {
          el.dataset.mvipMediaKind = isTableFigure(el) ? 'table' : 'figure';
          try { mediaPanel.appendChild(el); } catch (_) {}
        });
      }

      const OUT_W = 1600;
      const OUT_H = 900;
      const padX = hasRichMedia ? 42 : 52;
      const padY = hasRichMedia ? 34 : 42;
      const contentW = OUT_W - padX * 2;
      const contentH = OUT_H - padY * 2;
      // Hình minh họa trong phần trình chiếu luôn giữ nguyên tỷ lệ gốc.
      // Kích thước tối đa của chính hình bằng 2/3 khung trình chiếu 1600 × 900.
      const FIGURE_MAX_W = Math.floor(OUT_W * 2 / 3);
      const FIGURE_MAX_H = Math.floor(OUT_H * 2 / 3);

      cardEl.classList.remove('is-tall-layout');
      Object.assign(cardEl.style, {
        width: `${OUT_W}px`,
        minWidth: `${OUT_W}px`,
        maxWidth: `${OUT_W}px`,
        height: `${OUT_H}px`,
        minHeight: `${OUT_H}px`,
        maxHeight: `${OUT_H}px`,
        boxSizing: 'border-box',
        padding: `${padY}px ${padX}px`,
        display: 'flex',
        flexDirection: 'column',
        justifyContent: 'flex-start',
        alignItems: 'stretch',
        overflow: 'hidden',
        background: '#ffffff',
        color: '#111827',
        border: '0',
        borderRadius: '0',
        textAlign: 'left',
      });
      if (questionEl) {
        questionEl.style.maxWidth = '100%';
        questionEl.style.margin = '0';
        questionEl.style.padding = '0';
      }
      if (optionsEl) {
        optionsEl.style.width = '100%';
        optionsEl.style.maxWidth = '100%';
        optionsEl.style.marginTop = '0';
      }

      const hasTallFormula = formulaEls.some((el) => {
        const single = (parseFloat(el.style.getPropertyValue('--cv-formula-single-line')) || 0) >= 1;
        const lines = Math.max(1, parseFloat(el.style.getPropertyValue('--cv-formula-line-count')) || (single ? 1 : 2));
        return !single || lines > 1;
      }) || !!cardEl.querySelector(
        'mfrac,.single-exam-frac,.single-exam-system,.single-exam-eqarr,'
        + '.mvip-ordinary-mathtype-equation.is-stacked'
      );
      const preferredStack = hasImageLikeFigureMedia || promptPlain.length >= 145 || longestOptionText >= 54 || totalOptionTextLength >= 205 || (hasTallFormula && longestOptionText >= 32);
      // Theo yêu cầu hiển thị thống nhất: mọi phương án A/B/C/D luôn là 01 cột.
      const sourceLayoutModes = ['stack'];
      const layoutModes = hasTableMedia
        ? (hasVerticalTable ? ['table-side'] : ['table-center', 'table-side'])
        : (hasFigureMedia ? ['media-panel'] : sourceLayoutModes);
      const fontSizes = [];
      const maxFontSize = hasVerticalTable ? 86 : (hasMathFormula ? 68 : 74);
      const minFontSize = hasTableMedia ? 8 : 20;
      for (let size = maxFontSize; size >= minFontSize; size -= 2) fontSizes.push(size);

      const setFormulaScale = (fontSize) => {
        if (!formulaEls.length) return;
        formulaEls.forEach((element) => {
          /* Công thức đã đi qua bộ nhận diện của Word thông thường phải giữ đúng
             phép đo theo font của dòng và baseline Word. Không nhân tiếp hệ số
             1,5 của chế độ câu hỏi, vì sẽ làm sai cả kích thước lẫn vị trí. */
          if (element.classList.contains('mvip-ordinary-word-sized-mathtype')
              && typeof window.cv7991ApplyOrdinaryMathTypeWordSizing === 'function') {
            try { window.cv7991ApplyOrdinaryMathTypeWordSizing(element.parentElement || cardEl); } catch (_) {}
            return;
          }
          const baseW = parseFloat(element.style.getPropertyValue('--cv-formula-base-width')) || parseFloat(element.style.width) || 18;
          const baseH = parseFloat(element.style.getPropertyValue('--cv-formula-base-height')) || parseFloat(element.style.height) || 12;
          const isSingleLine = (parseFloat(element.style.getPropertyValue('--cv-formula-single-line')) || 0) >= 1;
          const lineCount = Math.max(1, parseFloat(element.style.getPropertyValue('--cv-formula-line-count')) || (isSingleLine ? 1 : 2));
          cv7991ResetMathTypePromptLineCompaction(element);
          const wordEm = parseFloat(element.style.getPropertyValue('--cv-formula-word-em'));
          const fallbackEm = isSingleLine ? 0.86 : Math.min(4.2, 0.58 + lineCount * 0.78);
          const targetOuterEm = Math.max(0.44, Math.min(4.2, Number.isFinite(wordEm) && wordEm > 0 ? wordEm : fallbackEm));
          const targetH = Math.max(8, fontSize * targetOuterEm * 1.5
            * cv7991MathTypeElementDisplayScale(element, lineCount)
            * cv7991PresentationMathTypeScale());
          const wordRatio = parseFloat(element.style.getPropertyValue('--cv-word-display-ratio'));
          const aspectRatio = Number.isFinite(wordRatio) && wordRatio > 0.03
            ? wordRatio
            : (baseW / Math.max(1, baseH));
          const targetW = targetH * Math.max(0.03, aspectRatio);

          element.style.setProperty('width', `${Math.max(4, Math.round(targetW * 100) / 100)}px`, 'important');
          element.style.setProperty('height', `${Math.max(4, Math.round(targetH * 100) / 100)}px`, 'important');
          element.style.setProperty('max-width', 'none', 'important');
          element.style.setProperty('max-height', 'none', 'important');
          element.style.setProperty('object-fit', 'contain', 'important');
          element.style.setProperty('object-position', 'center', 'important');

          const inlineCenterContext = !!element.closest(
            '.single-exam-word-question, .single-exam-word-option-body'
          );
          const reserveLineBox = cv7991MathTypeNeedsReservedLineBox(element, fontSize, targetH, lineCount);
          const exactBaselineDrop = cv7991MathTypeExactBaselineDropPx(element, targetW, targetH);
          if (reserveLineBox) {
            cv7991ApplyReservedMathTypeLineBox(element);
          } else if (Number.isFinite(exactBaselineDrop)) {
            const fineTuneLowering = cv7991MathTypeFineTuneLoweringPx(fontSize, lineCount);
            const adjustedBaselineDrop = Math.min(targetH * 0.76, exactBaselineDrop + fineTuneLowering);
            element.classList.add('cv-inline-baseline-formula');
            element.style.setProperty('vertical-align', 'baseline', 'important');
            element.style.setProperty('transform', `translateY(${Math.round(adjustedBaselineDrop * 100) / 100}px)`, 'important');
            element.style.setProperty('transform-origin', 'center bottom', 'important');
          } else if (inlineCenterContext && isSingleLine) {
            const metrics = cv7991MeasureFormulaInkMetrics(element);
            const bottomPaddingRatio = Math.max(0, Math.min(0.4,
              Number(metrics && metrics.bottomPaddingRatio) || 0.08
            ));
            const transparentBottom = targetH * bottomPaddingRatio;
            const textInkDescent = cv7991MeasureInlineTextInkDescent(element, fontSize);
            /* vertical-align:baseline đặt đáy HỘP công thức tại baseline. Dịch xuống đúng
               phần trắng đáy của ảnh và phần chân chữ sẽ làm đáy NÉT công thức trùng
               với đáy nét của x, 0 và các ký tự thường xung quanh. */
            const opticalLowering = cv7991MathTypeOpticalLoweringPx(fontSize, lineCount);
            const maxDrop = Math.min(fontSize * 0.44, targetH * 0.60);
            const dropPx = Math.max(0, Math.min(maxDrop, transparentBottom + textInkDescent + opticalLowering));
            element.classList.add('cv-inline-baseline-formula');
            element.style.setProperty('vertical-align', 'baseline', 'important');
            element.style.setProperty('transform', `translateY(${Math.round(dropPx * 100) / 100}px)`, 'important');
            element.style.setProperty('transform-origin', 'center bottom', 'important');
          } else if (inlineCenterContext) {
            const metrics = cv7991MeasureFormulaInkMetrics(element);
            const topPaddingRatio = Math.max(0, Math.min(0.48,
              Number(metrics && metrics.topPaddingRatio) || 0.08
            ));
            const bottomPaddingRatio = Math.max(0, Math.min(0.48,
              Number(metrics && metrics.bottomPaddingRatio) || 0.08
            ));
            // Công thức nhiều tầng vẫn căn theo tâm phần nét để phân số/căn không bị nâng quá cao.
            const inkCenterDrop = (bottomPaddingRatio - topPaddingRatio) * targetH * 0.5;
            const opticalDrop = element.closest('.single-exam-word-question') ? fontSize * 0.025 : 0;
            const mathTypeLowering = cv7991MathTypeOpticalLoweringPx(fontSize, lineCount);
            const minDrop = -fontSize * 0.08;
            const maxDrop = fontSize * 0.30;
            const dropPx = Math.max(minDrop, Math.min(maxDrop, inkCenterDrop + opticalDrop + mathTypeLowering));
            element.classList.remove('cv-inline-baseline-formula');
            element.style.setProperty('vertical-align', 'middle', 'important');
            element.style.setProperty('transform', `translateY(${Math.round(dropPx * 100) / 100}px)`, 'important');
            element.style.setProperty('transform-origin', 'center center', 'important');
          } else if (isSingleLine) {
            const metrics = cv7991MeasureFormulaInkMetrics(element);
            const bottomPaddingRatio = Math.max(0, Math.min(0.4,
              Number(metrics && metrics.bottomPaddingRatio) || 0.08
            ));
            const transparentBottom = targetH * bottomPaddingRatio;
            const textInkDescent = cv7991MeasureInlineTextInkDescent(element, fontSize);
            const opticalLowering = cv7991MathTypeOpticalLoweringPx(fontSize, lineCount);
            const maxDrop = Math.min(fontSize * 0.44, targetH * 0.60);
            const dropPx = Math.max(0, Math.min(maxDrop, transparentBottom + textInkDescent + opticalLowering));
            element.classList.add('cv-inline-baseline-formula');
            element.style.setProperty('vertical-align', 'baseline', 'important');
            element.style.setProperty('transform', `translateY(${Math.round(dropPx * 100) / 100}px)`, 'important');
            element.style.setProperty('transform-origin', 'center bottom', 'important');
          } else {
            element.classList.remove('cv-inline-baseline-formula');
            element.style.setProperty('vertical-align', 'middle', 'important');
            element.style.setProperty('transform', 'translateY(0)', 'important');
            element.style.setProperty('transform-origin', 'center center', 'important');
          }
          cv7991ApplyMathTypePromptLineCompaction(element, fontSize, targetH);
        });
      };

      const setWordGroupScale = (fontSize) => {
        if (!wordGroupEls.length) return;
        wordGroupEls.forEach((el) => {
          const baseW = parseFloat(el.style.getPropertyValue('--cv-presenter-base-width')) || parseFloat(el.style.width) || 320;
          const baseH = parseFloat(el.style.getPropertyValue('--cv-presenter-base-height')) || parseFloat(el.style.height) || 160;
          const ratio = baseW > 0 && baseH > 0 ? baseW / baseH : 2;
          const scale = Math.max(1.2, Math.min(3.1, fontSize / 22));
          let width = Math.min(contentW * 0.9, baseW * scale);
          let height = width / Math.max(.1, ratio);
          const maxHeight = Math.min(contentH * 0.48, 390);
          if (height > maxHeight) { height = maxHeight; width = height * ratio; }
          el.style.setProperty('width', `${Math.max(120, Math.round(width * 100) / 100)}px`, 'important');
          el.style.setProperty('height', `${Math.max(60, Math.round(height * 100) / 100)}px`, 'important');
          el.style.setProperty('max-width', '92%', 'important');
          el.style.setProperty('max-height', `${Math.round(maxHeight)}px`, 'important');
          el.style.display = 'block';
          el.style.marginLeft = 'auto';
          el.style.marginRight = 'auto';
        });
      };

      const mediaPanelInnerSize = () => {
        if (!mediaPanel) return { width: contentW, height: contentH };
        const rect = mediaPanel.getBoundingClientRect();
        let width = Number(rect && rect.width) || parseFloat(mediaPanel.style.width) || contentW;
        let height = Number(rect && rect.height) || parseFloat(mediaPanel.style.height) || contentH;
        try {
          const cs = getComputedStyle(mediaPanel);
          width -= (parseFloat(cs.paddingLeft) || 0) + (parseFloat(cs.paddingRight) || 0);
          height -= (parseFloat(cs.paddingTop) || 0) + (parseFloat(cs.paddingBottom) || 0);
        } catch (_) {}
        return { width: Math.max(1, width), height: Math.max(1, height) };
      };

      const mediaCssNumber = (el, propertyName) => {
        if (!el) return 0;
        let value = 0;
        try { value = parseFloat(el.style && el.style.getPropertyValue(propertyName)); } catch (_) {}
        if (!(value > 0)) {
          try { value = parseFloat(getComputedStyle(el).getPropertyValue(propertyName)); } catch (_) {}
        }
        return Number.isFinite(value) && value > 0 ? value : 0;
      };

      const mediaElementSourceAspectRatio = (el) => {
        if (!el) return 0;
        const candidates = [];
        const add = (width, height) => {
          const w = Number(width) || 0;
          const h = Number(height) || 0;
          if (w > 0 && h > 0) candidates.push(w / h);
        };
        if (el.matches && el.matches('img')) add(el.naturalWidth, el.naturalHeight);
        if (el.matches && el.matches('canvas')) add(el.width, el.height);
        const svg = el.matches && el.matches('svg') ? el : (el.querySelector ? el.querySelector('svg') : null);
        if (svg) {
          const viewBox = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
          if (viewBox.length >= 4) add(viewBox[2], viewBox[3]);
          add(parseFloat(svg.getAttribute('width')), parseFloat(svg.getAttribute('height')));
          add(parseFloat(svg.style.width), parseFloat(svg.style.height));
        }
        const preferredSource = mediaCssNumber(el, '--cv-source-ratio');
        if (preferredSource > 0) candidates.unshift(preferredSource);
        const ratio = candidates.find((value) => Number.isFinite(value) && value > 0.02 && value < 50) || 0;
        return ratio || 0;
      };

      const mediaElementAspectRatio = (el) => {
        if (!el) return 0;
        // Tỷ lệ đã lấy từ chính hộp hiển thị của Word phải được ưu tiên hơn
        // naturalWidth/viewBox của WMF/EMF đã chuyển đổi.
        const preferred = mediaCssNumber(el, '--cv-presenter-ratio');
        if (preferred > 0.02 && preferred < 50) return preferred;
        const sourceRatio = mediaElementSourceAspectRatio(el);
        if (sourceRatio > 0) return sourceRatio;
        const candidates = [];
        const add = (width, height) => {
          const w = Number(width) || 0;
          const h = Number(height) || 0;
          if (w > 0 && h > 0) candidates.push(w / h);
        };
        add(parseFloat(el.getAttribute && el.getAttribute('width')), parseFloat(el.getAttribute && el.getAttribute('height')));
        add(parseFloat(el.style && el.style.width), parseFloat(el.style && el.style.height));
        const rect = el.getBoundingClientRect ? el.getBoundingClientRect() : null;
        if (rect) add(rect.width, rect.height);
        return candidates.find((value) => Number.isFinite(value) && value > 0.02 && value < 50) || 0;
      };

      const mediaElementNeedsWordRatio = (el) => {
        const forced = mediaCssNumber(el, '--cv-force-display-ratio') >= 0.5;
        if (forced) return true;
        const desired = mediaElementAspectRatio(el);
        const source = mediaElementSourceAspectRatio(el);
        return desired > 0 && source > 0 && cv7991AspectRatiosDiffer(desired, source);
      };

      const mediaPixelValue = (value) => {
        const text = String(value == null ? '' : value).trim();
        if (!/^[+-]?(?:\d+\.?\d*|\.\d+)px$/i.test(text)) return 0;
        const number = parseFloat(text);
        return Number.isFinite(number) && number > 0 ? number : 0;
      };

      const mediaElementPreferredSize = (el, aspectRatio = 0) => {
        if (!el) return { width: 0, height: 0 };
        const ratio = Number(aspectRatio) > 0 ? Number(aspectRatio) : mediaElementAspectRatio(el);
        let width = mediaCssNumber(el, '--cv-presenter-base-width');
        let height = mediaCssNumber(el, '--cv-presenter-base-height');

        // Kích thước inline do bộ đọc Word tạo ra là kích thước người dùng đã đặt trong tài liệu.
        if (!(width > 0)) width = mediaPixelValue(el.style && el.style.width);
        if (!(height > 0)) height = mediaPixelValue(el.style && el.style.height);

        // Phương án dự phòng cho ảnh/ SVG không đi qua bộ nhập Word chuẩn.
        if (!(width > 0)) {
          const attrWidth = String(el.getAttribute && el.getAttribute('width') || '').trim();
          if (/^[+-]?(?:\d+\.?\d*|\.\d+)$/.test(attrWidth)) width = Number(attrWidth) || 0;
        }
        if (!(height > 0)) {
          const attrHeight = String(el.getAttribute && el.getAttribute('height') || '').trim();
          if (/^[+-]?(?:\d+\.?\d*|\.\d+)$/.test(attrHeight)) height = Number(attrHeight) || 0;
        }

        if (!(width > 0) || !(height > 0)) {
          const rect = el.getBoundingClientRect ? el.getBoundingClientRect() : null;
          if (!(width > 0) && rect && rect.width > 0) width = rect.width;
          if (!(height > 0) && rect && rect.height > 0) height = rect.height;
        }
        if (!(width > 0) && el.matches && el.matches('img') && Number(el.naturalWidth) > 0) width = Number(el.naturalWidth);
        if (!(height > 0) && el.matches && el.matches('img') && Number(el.naturalHeight) > 0) height = Number(el.naturalHeight);
        if (!(width > 0) && el.matches && el.matches('canvas') && Number(el.width) > 0) width = Number(el.width);
        if (!(height > 0) && el.matches && el.matches('canvas') && Number(el.height) > 0) height = Number(el.height);

        // Chuẩn hóa bằng cùng một tỷ lệ; không bao giờ nới rộng hộp kích thước gốc.
        if (ratio > 0) {
          if (width > 0 && height > 0) {
            const heightFromWidth = width / ratio;
            if (heightFromWidth <= height) height = heightFromWidth;
            else width = height * ratio;
          } else if (width > 0) {
            height = width / ratio;
          } else if (height > 0) {
            width = height * ratio;
          }
        }

        width = Number.isFinite(width) && width > 0 ? width : 0;
        height = Number.isFinite(height) && height > 0 ? height : 0;
        // Ghi nhớ một lần để các vòng thử cỡ chữ/bố cục không lấy nhầm kích thước đã bị sửa.
        if (width > 0 && !(mediaCssNumber(el, '--cv-presenter-base-width') > 0)) {
          el.style.setProperty('--cv-presenter-base-width', `${Math.round(width * 100) / 100}px`);
        }
        if (height > 0 && !(mediaCssNumber(el, '--cv-presenter-base-height') > 0)) {
          el.style.setProperty('--cv-presenter-base-height', `${Math.round(height * 100) / 100}px`);
        }
        return { width, height };
      };

      const cv7991NormalizeFigureMediaToCanvas = async () => {
        if (!mediaPanel) return;
        const children = Array.from(mediaPanel.children);
        for (const child of children) {
          if (!(child instanceof HTMLElement)) continue;
          if (!(child.matches('img,canvas') || child.classList.contains('single-exam-inline-vector'))) continue;
          if (!mediaElementNeedsWordRatio(child)) continue;
          const desiredRatio = mediaElementAspectRatio(child);
          if (!(desiredRatio > 0.02 && desiredRatio < 50)) continue;

          let drawable = null;
          try {
            if (child.matches('img')) {
              if (!(child.complete && child.naturalWidth > 0)) {
                await new Promise((resolve) => {
                  let done = false;
                  const finish = () => { if (done) return; done = true; resolve(); };
                  child.addEventListener('load', finish, { once: true });
                  child.addEventListener('error', finish, { once: true });
                  setTimeout(finish, 2500);
                });
              }
              if (child.complete && child.naturalWidth > 0) drawable = child;
            } else if (child.matches('canvas')) {
              drawable = child;
            } else {
              const svg = child.querySelector('svg');
              if (svg) {
                const clone = svg.cloneNode(true);
                clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
                clone.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
                clone.setAttribute('preserveAspectRatio', 'none');
                const serialized = new XMLSerializer().serializeToString(clone);
                const url = cv7991SvgTextDataUrl(serialized);
                if (url) drawable = await cv7991ImageFromUrl(url, 5000);
              }
            }
          } catch (_) {
            drawable = null;
          }
          if (!drawable) continue;

          // Chuẩn hóa hình về đúng tỷ lệ nhìn thấy trong Word trên một canvas riêng.
          // Độ phân giải canvas bám theo kích thước ảnh gốc và chỉ có giới hạn trên;
          // kích thước hiển thị không bị phóng cố định lên 2/3 màn chiếu.
          const preferredSize = mediaElementPreferredSize(child, desiredRatio);
          const maxCanvasW = Math.max(2, FIGURE_MAX_W * 2);
          const maxCanvasH = Math.max(2, FIGURE_MAX_H * 2);
          let sourceW = 0;
          let sourceH = 0;
          if (child.matches && child.matches('img')) {
            sourceW = Number(child.naturalWidth) || 0;
            sourceH = Number(child.naturalHeight) || 0;
          } else if (child.matches && child.matches('canvas')) {
            sourceW = Number(child.width) || 0;
            sourceH = Number(child.height) || 0;
          }
          let canvasW = Math.max(64, (preferredSize.width || 0) * 2, sourceW || 0);
          let canvasH = canvasW / desiredRatio;
          const preferredCanvasH = Math.max(64, (preferredSize.height || 0) * 2, sourceH || 0);
          if (preferredCanvasH > canvasH) {
            canvasH = preferredCanvasH;
            canvasW = canvasH * desiredRatio;
          }
          const canvasScale = Math.min(1, maxCanvasW / Math.max(1, canvasW), maxCanvasH / Math.max(1, canvasH));
          canvasW *= canvasScale;
          canvasH *= canvasScale;
          const normalized = document.createElement('canvas');
          normalized.width = Math.max(2, Math.round(canvasW));
          normalized.height = Math.max(2, Math.round(canvasH));
          normalized.className = 'single-exam-inline-media cv7991-normalized-figure';
          normalized.style.cssText = child.style.cssText;
          normalized.style.setProperty('--cv-presenter-ratio', String(desiredRatio));
          normalized.style.setProperty('--cv-source-ratio', String(desiredRatio));
          normalized.style.setProperty('--cv-force-display-ratio', '0');
          if (preferredSize.width > 0) normalized.style.setProperty('--cv-presenter-base-width', `${Math.round(preferredSize.width * 100) / 100}px`);
          if (preferredSize.height > 0) normalized.style.setProperty('--cv-presenter-base-height', `${Math.round(preferredSize.height * 100) / 100}px`);
          normalized.style.objectFit = 'fill';
          normalized.style.objectPosition = 'center';
          try {
            const ctx = normalized.getContext('2d');
            if (!ctx) continue;
            ctx.imageSmoothingEnabled = true;
            try { ctx.imageSmoothingQuality = 'high'; } catch (_) {}
            ctx.clearRect(0, 0, normalized.width, normalized.height);
            ctx.drawImage(drawable, 0, 0, normalized.width, normalized.height);
            child.replaceWith(normalized);
          } catch (_) {}
        }
        await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      };

      await cv7991NormalizeFigureMediaToCanvas();

      const fitImageLikeMediaToPanel = (child) => {
        const box = mediaPanelInnerSize();
        const ratio = mediaElementAspectRatio(child);
        const forceDisplayRatio = mediaElementNeedsWordRatio(child);
        // 2/3 màn chiếu là kích thước TỐI ĐA và cũng là đích phóng to.
        // Ảnh nhỏ sẽ được phóng đồng tỷ lệ đến khi chạm một trong hai giới hạn,
        // ảnh lớn sẽ được thu đồng tỷ lệ; vì vậy ảnh luôn giữ đúng tỷ lệ gốc.
        const limitW = Math.max(1, Math.min(box.width, FIGURE_MAX_W));
        const limitH = Math.max(1, Math.min(box.height, FIGURE_MAX_H));
        const preferred = mediaElementPreferredSize(child, ratio);
        let targetW = preferred.width;
        let targetH = preferred.height;

        if (!(targetW > 0) && targetH > 0 && ratio > 0) targetW = targetH * ratio;
        if (!(targetH > 0) && targetW > 0 && ratio > 0) targetH = targetW / ratio;
        if (!(targetW > 0)) targetW = Math.min(limitW, ratio > 0 ? 320 : 240);
        if (!(targetH > 0)) targetH = ratio > 0 ? targetW / ratio : Math.min(limitH, 180);

        let scale = Math.min(
          limitW / Math.max(1, targetW),
          limitH / Math.max(1, targetH),
          FIGURE_MAX_W / Math.max(1, targetW),
          FIGURE_MAX_H / Math.max(1, targetH)
        );
        if (!Number.isFinite(scale) || scale <= 0) scale = 1;
        targetW = Math.max(1, targetW * scale);
        targetH = Math.max(1, targetH * scale);

        child.style.margin = '0';
        child.style.maxWidth = `${FIGURE_MAX_W}px`;
        child.style.maxHeight = `${FIGURE_MAX_H}px`;
        child.style.minWidth = '0';
        child.style.minHeight = '0';
        child.style.objectFit = forceDisplayRatio ? 'fill' : 'contain';
        child.style.objectPosition = 'right bottom';
        child.style.flex = '0 0 auto';
        child.style.alignSelf = 'flex-end';
        child.style.justifySelf = 'end';
        child.style.width = `${Math.round(targetW * 100) / 100}px`;
        child.style.height = `${Math.round(targetH * 100) / 100}px`;
        child.style.aspectRatio = ratio > 0 ? `${ratio} / 1` : 'auto';

        if (child.classList.contains('single-exam-inline-vector')) {
          child.style.display = 'flex';
          child.style.alignItems = 'flex-end';
          child.style.justifyContent = 'flex-end';
          const svg = child.querySelector('svg');
          if (svg) {
            svg.setAttribute('width', '100%');
            svg.setAttribute('height', '100%');
            svg.setAttribute('preserveAspectRatio', forceDisplayRatio ? 'none' : 'xMaxYMax meet');
            svg.style.width = '100%';
            svg.style.height = '100%';
            svg.style.maxWidth = '100%';
            svg.style.maxHeight = '100%';
            svg.style.overflow = 'visible';
          }
        }
      };

      const cv7991VisibleMediaLeftInset = (child, displayedWidth) => {
        if (!(child instanceof HTMLElement) || !(displayedWidth > 0)) return 0;
        try {
          let source = child;
          if (child.classList.contains('single-exam-inline-vector')) return 0;
          let sourceW = 0;
          let sourceH = 0;
          if (child.matches('img') && child.complete && child.naturalWidth > 0) {
            sourceW = child.naturalWidth;
            sourceH = child.naturalHeight;
          } else if (child.matches('canvas') && child.width > 0) {
            sourceW = child.width;
            sourceH = child.height;
          } else {
            return 0;
          }
          const maxSide = 420;
          const scale = Math.min(1, maxSide / Math.max(sourceW, sourceH));
          const canvas = document.createElement('canvas');
          canvas.width = Math.max(1, Math.round(sourceW * scale));
          canvas.height = Math.max(1, Math.round(sourceH * scale));
          const ctx = canvas.getContext('2d', { willReadFrequently: true });
          if (!ctx) return 0;
          ctx.clearRect(0, 0, canvas.width, canvas.height);
          ctx.drawImage(source, 0, 0, canvas.width, canvas.height);
          const data = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
          let firstInkX = canvas.width;
          for (let y = 0; y < canvas.height; y += 1) {
            for (let x = 0; x < canvas.width; x += 1) {
              const i = (y * canvas.width + x) * 4;
              const a = data[i + 3];
              const r = data[i];
              const g = data[i + 1];
              const b = data[i + 2];
              if (a > 20 && (r < 245 || g < 245 || b < 245) && r + g + b < 724) {
                firstInkX = Math.min(firstInkX, x);
                break;
              }
            }
            if (firstInkX <= 1) break;
          }
          if (firstInkX >= canvas.width) return 0;
          const ratio = firstInkX / Math.max(1, canvas.width);
          // Chừa lại một ít nền trắng trước nét hình, chỉ tận dụng tối đa 32% chiều rộng ảnh.
          return Math.max(0, Math.min(displayedWidth * 0.32, displayedWidth * ratio - 10));
        } catch (_) {
          return 0;
        }
      };

      const measureImageMediaFittedSize = () => {
        if (!mediaPanel) return { width: 0, height: 0, count: 0, leftInset: 0 };
        let maxWidth = 0;
        let totalHeight = 0;
        let count = 0;
        let usableLeftInset = 0;
        Array.from(mediaPanel.children).forEach((child) => {
          if (!(child instanceof HTMLElement)) return;
          const isImageLike = child.matches('img,canvas') || child.classList.contains('single-exam-inline-vector');
          if (!isImageLike) return;
          const rect = child.getBoundingClientRect();
          const width = Math.max(0, Number(rect.width) || mediaPixelValue(child.style.width));
          const height = Math.max(0, Number(rect.height) || mediaPixelValue(child.style.height));
          maxWidth = Math.max(maxWidth, width);
          totalHeight += height;
          const inset = cv7991VisibleMediaLeftInset(child, width);
          usableLeftInset = count === 0 ? inset : Math.min(usableLeftInset, inset);
          count += 1;
        });
        const gap = count > 1 ? Math.max(0, (count - 1) * 6) : 0;
        return {
          width: Math.ceil(maxWidth),
          height: Math.ceil(totalHeight + gap),
          count,
          leftInset: Math.max(0, Math.floor(usableLeftInset)),
        };
      };

      const styleMediaPanelChildren = (fontSize) => {
        if (!mediaPanel) return;
        Array.from(mediaPanel.children).forEach((child) => {
          if (!(child instanceof HTMLElement)) return;
          child.style.margin = '0';
          child.style.maxWidth = '100%';
          child.style.maxHeight = '100%';
          if (child.matches('img,canvas') || child.classList.contains('single-exam-inline-vector')) {
            fitImageLikeMediaToPanel(child);
          } else if (child.classList.contains('single-exam-inline-table') || child.matches('table')) {
            // Bảng biểu dùng cùng cỡ chữ với câu hỏi và phương án.
            // Khi bảng ngang quá lớn, thuật toán sẽ giảm cỡ chữ chung của cả slide
            // thay vì thu nhỏ riêng bảng.
            const tableFontSize = fontSize;
            const tableLineHeight = hasHorizontalTable
              ? (fontSize >= 54 ? 1.18 : (fontSize >= 42 ? 1.2 : 1.22))
              : 1.15;
            child.style.display = 'inline-block';
            child.style.width = 'auto';
            child.style.height = 'auto';
            child.style.maxWidth = 'none';
            child.style.maxHeight = 'none';
            child.style.transform = 'none';
            child.style.transformOrigin = hasVerticalTable ? 'right bottom' : 'center center';
            child.style.fontSize = `${tableFontSize}px`;
            child.style.lineHeight = String(tableLineHeight);
            const tbl = child.matches('table') ? child : child.querySelector('table');
            if (tbl) {
              tbl.style.display = 'table';
              tbl.style.tableLayout = 'auto';
              tbl.style.width = 'auto';
              tbl.style.height = 'auto';
              tbl.style.maxWidth = 'none';
              tbl.style.maxHeight = 'none';
              tbl.style.margin = '0';
              tbl.style.fontSize = `${tableFontSize}px`;
              tbl.style.lineHeight = String(tableLineHeight);
              Array.from(tbl.querySelectorAll('td,th')).forEach((cell) => {
                cell.style.fontSize = cell.closest('tr') && cell.closest('tr').classList.contains('cv7991-table-title-row') ? '0.5em' : 'inherit';
                cell.style.lineHeight = String(tableLineHeight);
                const padY = hasHorizontalTable
                  ? Math.max(3, Math.round(tableFontSize * 0.16))
                  : Math.max(2, Math.round(tableFontSize * 0.1));
                const padX = hasHorizontalTable
                  ? Math.max(3, Math.round(tableFontSize * 0.08))
                  : Math.max(4, Math.round(tableFontSize * 0.14));
                cell.style.padding = `${padY}px ${padX}px`;
                // Giữ nguyên cụm chữ trong ô bảng, ví dụ "Câu 1" không bị tách thành 2 dòng.
                cell.style.whiteSpace = 'nowrap';
                cell.style.wordBreak = 'keep-all';
                cell.style.overflowWrap = 'normal';
              });
            }
          }
        });
      };

      const measureTableMediaNaturalSize = () => {
        if (!mediaPanel || !hasTableMedia) return { width: 0, height: 0, count: 0 };
        let maxWidth = 0;
        let totalHeight = 0;
        let count = 0;
        Array.from(mediaPanel.children).forEach((child) => {
          if (!(child instanceof HTMLElement)) return;
          const isTable = child.classList.contains('single-exam-inline-table') || child.matches('table');
          if (!isTable) return;
          child.style.transform = 'none';
          child.style.position = 'static';
          child.style.left = '';
          child.style.right = '';
          child.style.top = '';
          child.style.bottom = '';
          child.style.display = 'inline-block';
          child.style.width = 'auto';
          child.style.height = 'auto';
          child.style.maxWidth = 'none';
          child.style.maxHeight = 'none';
          const tbl = child.matches('table') ? child : child.querySelector('table');
          if (tbl) {
            tbl.style.width = 'auto';
            tbl.style.height = 'auto';
            tbl.style.maxWidth = 'none';
            tbl.style.maxHeight = 'none';
          }
          const rect = child.getBoundingClientRect();
          maxWidth = Math.max(maxWidth, rect.width);
          totalHeight += rect.height;
          count += 1;
        });
        return {
          width: Math.ceil(Math.max(0, maxWidth)),
          height: Math.ceil(Math.max(0, totalHeight)),
          count,
        };
      };

      const scaleTableMediaToPanel = () => {
        if (!mediaPanel || !hasTableMedia) return;
        const availW = Math.max(1, mediaPanel.clientWidth);
        const availH = Math.max(1, mediaPanel.clientHeight);
        Array.from(mediaPanel.children).forEach((child) => {
          if (!(child instanceof HTMLElement)) return;
          const isTable = child.classList.contains('single-exam-inline-table') || child.matches('table');
          if (!isTable) {
            child.style.transform = 'none';
            return;
          }

          child.style.transform = 'none';
          child.style.transformOrigin = hasVerticalTable ? 'top right' : 'center center';
          child.style.display = 'inline-block';
          child.style.left = '';
          if (hasVerticalTable) {
            child.style.position = 'absolute';
            child.style.right = '0px';
            child.style.top = '0px';
            child.style.bottom = '';
          } else if (hasHorizontalTable) {
            child.style.position = 'absolute';
            child.style.right = '';
            child.style.top = '0px';
            child.style.bottom = '';
            child.style.left = '0px';
          } else {
            child.style.position = 'static';
            child.style.right = '';
            child.style.top = '';
            child.style.bottom = '';
          }

          const tbl = child.matches('table') ? child : child.querySelector('table');
          if (tbl) {
            tbl.style.width = 'auto';
            tbl.style.height = 'auto';
            tbl.style.maxWidth = 'none';
            tbl.style.maxHeight = 'none';
          }

          const naturalRect = child.getBoundingClientRect();
          const naturalW = Math.max(1, naturalRect.width);
          const naturalH = Math.max(1, naturalRect.height);
          if (hasHorizontalTable || hasVerticalTable) {
            // Bảng không bị co giãn riêng. Nếu bảng chưa vừa,
            // vòng chọn cỡ chữ sẽ giảm cỡ chữ chung cho cả vùng I và vùng II.
            child.style.transformOrigin = hasVerticalTable ? 'top right' : 'top left';
            child.style.left = hasVerticalTable ? '' : `${Math.max(0, (availW - naturalW) / 2)}px`;
            child.style.right = hasVerticalTable ? '0px' : '';
            child.style.top = hasVerticalTable ? '0px' : `${Math.max(0, (availH - naturalH) / 2)}px`;
            child.style.transform = 'none';
          } else {
            let scale = Math.min(availW / naturalW, availH / naturalH);
            if (!Number.isFinite(scale) || scale <= 0) scale = 1;
            scale = Math.max(0.1, scale);
            child.style.transform = `scale(${scale})`;
          }
        });
      };

      const applyLayout = (fontSize, mode) => {
        const lineHeight = hasMathFormula ? (fontSize >= 46 ? 1.16 : 1.18) : (fontSize >= 54 ? 1.18 : fontSize >= 42 ? 1.2 : 1.22);
        const labelWidth = Math.max(24, Math.round(fontSize * (hasMathFormula ? 0.72 : 0.78)));
        const optionGap = Math.max(2, Math.round(fontSize * (hasMathFormula ? 0.045 : 0.06)));
        const optionRowGap = Math.max(10, Math.round(fontSize * (hasMathFormula ? 0.28 : 0.22)));
        const questionGap = Math.max(14, Math.round(fontSize * (hasMathFormula ? 0.42 : 0.36)));

        cardEl.style.fontSize = `${fontSize}px`;
        cardEl.style.lineHeight = String(lineHeight);
        setFormulaScale(fontSize);
        setWordGroupScale(fontSize);

        if (questionEl) {
          questionEl.style.lineHeight = String(lineHeight);
          questionEl.style.marginBottom = `${questionGap}px`;
          questionEl.style.width = '100%';
        }
        if (optionsEl) {
          optionsEl.style.marginTop = '0';
          optionsEl.style.rowGap = `${optionRowGap}px`;
          optionsEl.style.height = 'auto';
        }
        optionEls.forEach((optEl) => {
          optEl.style.gap = `${optionGap}px`;
          optEl.style.alignItems = 'center';
        });
        const labelEls = Array.from(cardEl.querySelectorAll('.single-exam-word-option-label'));
        labelEls.forEach((labelEl) => {
          labelEl.style.flexBasis = `${labelWidth}px`;
          labelEl.style.minWidth = `${labelWidth}px`;
          labelEl.style.lineHeight = String(lineHeight);
        });
        optionBodyEls.forEach((bodyEl) => {
          bodyEl.style.lineHeight = String(lineHeight);
          bodyEl.style.whiteSpace = 'normal';
          bodyEl.style.width = 'auto';
          bodyEl.style.maxWidth = '100%';
          bodyEl.style.flex = '1 1 auto';
          bodyEl.style.minWidth = '0';
        });

        if (hasTableMedia && mediaPanel) {
          if (mode === 'table-side' && hasVerticalTable) {
            // Bảng dọc chia slide thành 2 vùng động theo chiều ngang:
            // - Vùng I chứa bảng, rộng đúng theo kích thước thật của bảng ở cỡ chữ hiện tại.
            // - Vùng II chứa câu hỏi + phương án, dùng phần còn lại.
            // Hai vùng tự tăng/giảm theo nhau; bảng và chữ bên ngoài luôn cùng cỡ chữ.
            const colGap = Math.max(6, Math.round(fontSize * 0.12));

            mediaPanel.style.display = 'flex';
            mediaPanel.style.flexDirection = 'column';
            mediaPanel.style.alignItems = 'flex-end';
            mediaPanel.style.justifyContent = 'flex-start';
            mediaPanel.style.padding = '0px';
            mediaPanel.style.overflow = 'visible';
            mediaPanel.style.position = 'relative';
            mediaPanel.style.right = '';
            mediaPanel.style.bottom = '';
            mediaPanel.style.left = '';
            mediaPanel.style.top = '';

            styleMediaPanelChildren(fontSize);
            const tableNatural = measureTableMediaNaturalSize();
            const naturalTableW = Math.max(1, tableNatural.width || Math.round(contentW * 0.34));
            const minLeftW = Math.max(260, Math.round(contentW * 0.28));
            const maxRightW = Math.max(1, contentW - minLeftW - colGap);
            const rightW = Math.ceil(Math.min(naturalTableW, maxRightW));
            const leftW = Math.max(1, contentW - rightW - colGap);
            const tableH = contentH;

            cardEl.style.display = 'grid';
            cardEl.style.position = 'relative';
            cardEl.style.gridTemplateColumns = `${leftW}px ${rightW}px`;
            cardEl.style.gridTemplateRows = 'auto auto';
            cardEl.style.columnGap = `${colGap}px`;
            cardEl.style.rowGap = `${Math.max(8, questionGap - 4)}px`;
            cardEl.style.alignItems = 'start';
            cardEl.style.justifyItems = 'stretch';
            cardEl.style.alignContent = 'start';

            if (questionEl) {
              questionEl.style.gridColumn = '1';
              questionEl.style.gridRow = '1';
              questionEl.style.alignSelf = 'start';
              questionEl.style.justifySelf = 'stretch';
              questionEl.style.maxWidth = '100%';
              questionEl.style.width = '100%';
            }

            mediaPanel.style.gridColumn = '2';
            mediaPanel.style.gridRow = '1 / span 2';
            mediaPanel.style.width = `${rightW}px`;
            mediaPanel.style.minWidth = `${rightW}px`;
            mediaPanel.style.maxWidth = `${rightW}px`;
            mediaPanel.style.height = `${tableH}px`;
            mediaPanel.style.minHeight = `${tableH}px`;
            mediaPanel.style.maxHeight = `${tableH}px`;
            mediaPanel.style.alignSelf = 'stretch';
            mediaPanel.style.justifySelf = 'end';
            mediaPanel.style.padding = '0px';
            mediaPanel.style.overflow = 'hidden';
            mediaPanel.style.position = 'relative';
            mediaPanel.style.flex = '';
            mediaPanel.style.marginTop = '';

            if (optionsEl) {
              optionsEl.classList.add('is-stacked');
              optionsEl.style.display = 'grid';
              optionsEl.style.gridTemplateColumns = 'minmax(0, 1fr)';
              optionsEl.style.columnGap = '0px';
              optionsEl.style.justifyItems = 'stretch';
              optionsEl.style.gridColumn = '1';
              optionsEl.style.gridRow = '2';
              optionsEl.style.width = '100%';
              optionsEl.style.maxWidth = '100%';
              optionsEl.style.alignSelf = 'start';
              optionsEl.style.justifySelf = 'stretch';
              optionsEl.style.flex = '';
              optionEls.forEach((optEl) => { optEl.style.width = '100%'; });
            }
          } else if (hasHorizontalTable) {
            // Bảng ngang chia slide thành 2 vùng động:
            // - Vùng I chứa bảng, cao đúng theo chiều cao thật của bảng ở cỡ chữ hiện tại.
            // - Vùng II chứa câu hỏi + phương án, dùng phần còn lại.
            // Hai vùng tự tăng/giảm theo nhau; bảng và chữ bên ngoài luôn cùng cỡ chữ.
            const tableW = contentW;
            const topGap = Math.max(6, Math.round(fontSize * 0.12));

            cardEl.style.display = 'flex';
            cardEl.style.flexDirection = 'column';
            cardEl.style.gridTemplateColumns = '';
            cardEl.style.gridTemplateRows = '';
            cardEl.style.columnGap = '0px';
            cardEl.style.rowGap = '0px';
            cardEl.style.alignItems = 'stretch';
            cardEl.style.justifyContent = 'flex-start';
            cardEl.style.alignContent = 'stretch';

            mediaPanel.style.gridColumn = '';
            mediaPanel.style.gridRow = '';
            mediaPanel.style.width = `${tableW}px`;
            mediaPanel.style.height = 'auto';
            mediaPanel.style.minHeight = '0px';
            mediaPanel.style.maxHeight = 'none';
            mediaPanel.style.flex = '0 0 auto';
            mediaPanel.style.marginTop = '0px';
            mediaPanel.style.alignSelf = 'center';
            mediaPanel.style.justifySelf = '';
            mediaPanel.style.padding = '0px';
            mediaPanel.style.overflow = 'visible';
            mediaPanel.style.display = 'flex';
            mediaPanel.style.flexDirection = 'column';
            mediaPanel.style.alignItems = 'center';
            mediaPanel.style.justifyContent = 'center';
            mediaPanel.style.position = 'relative';
            mediaPanel.style.right = '';
            mediaPanel.style.bottom = '';
            mediaPanel.style.left = '';
            mediaPanel.style.top = '';

            styleMediaPanelChildren(fontSize);
            const tableNatural = measureTableMediaNaturalSize();
            const tableH = Math.max(1, tableNatural.height || Math.round(contentH / 3));

            if (questionEl) {
              questionEl.style.gridColumn = '';
              questionEl.style.gridRow = '';
              questionEl.style.alignSelf = 'stretch';
              questionEl.style.justifySelf = '';
              questionEl.style.maxWidth = '100%';
              questionEl.style.width = '100%';
              questionEl.style.flex = '0 0 auto';
              questionEl.style.marginBottom = `${topGap}px`;
            }

            if (optionsEl) {
              optionsEl.classList.remove('is-stacked');
              optionsEl.style.display = 'grid';
              optionsEl.style.gridTemplateColumns = 'minmax(0, 1fr)';
              optionsEl.style.columnGap = `${Math.max(22, Math.round(fontSize * 0.82))}px`;
              optionsEl.style.justifyItems = 'stretch';
              optionsEl.style.gridColumn = '';
              optionsEl.style.gridRow = '';
              optionsEl.style.width = '100%';
              optionsEl.style.maxWidth = '100%';
              optionsEl.style.alignSelf = 'stretch';
              optionsEl.style.justifySelf = '';
              optionsEl.style.flex = '0 0 auto';
              optionEls.forEach((optEl) => { optEl.style.width = '100%'; });
            }

            mediaPanel.style.height = `${tableH}px`;
            mediaPanel.style.minHeight = `${tableH}px`;
            mediaPanel.style.maxHeight = `${tableH}px`;
            mediaPanel.style.flex = `0 0 ${tableH}px`;
            mediaPanel.style.marginTop = 'auto';
            mediaPanel.style.overflow = 'hidden';
          } else {
            const midH = Math.round(contentH * 0.33);
            const tableW = Math.round(contentW * 0.96);

            cardEl.style.display = 'grid';
            cardEl.style.gridTemplateColumns = '1fr';
            cardEl.style.gridTemplateRows = `auto ${midH}px auto`;
            cardEl.style.columnGap = '0px';
            cardEl.style.rowGap = `${questionGap}px`;
            cardEl.style.alignItems = 'start';

            if (questionEl) {
              questionEl.style.gridColumn = '1';
              questionEl.style.gridRow = '1';
              questionEl.style.alignSelf = 'start';
              questionEl.style.justifySelf = 'stretch';
              questionEl.style.maxWidth = '100%';
            }
            mediaPanel.style.gridColumn = '1';
            mediaPanel.style.gridRow = '2';
            mediaPanel.style.width = `${tableW}px`;
            mediaPanel.style.height = '100%';
            mediaPanel.style.alignSelf = 'center';
            mediaPanel.style.justifySelf = 'center';
            mediaPanel.style.padding = '4px';
            mediaPanel.style.overflow = 'hidden';
            mediaPanel.style.display = 'flex';
            mediaPanel.style.alignItems = 'center';
            mediaPanel.style.justifyContent = 'center';
            mediaPanel.style.position = '';
            mediaPanel.style.right = '';
            mediaPanel.style.bottom = '';
            mediaPanel.style.left = '';
            mediaPanel.style.top = '';
            mediaPanel.style.minHeight = '';
            mediaPanel.style.maxHeight = '';
            mediaPanel.style.flex = '';
            mediaPanel.style.marginTop = '';

            if (optionsEl) {
              optionsEl.classList.remove('is-stacked');
              optionsEl.style.display = 'grid';
              optionsEl.style.gridTemplateColumns = 'minmax(0, 1fr)';
              optionsEl.style.columnGap = `${Math.max(24, Math.round(fontSize * 0.9))}px`;
              optionsEl.style.justifyItems = 'stretch';
              optionsEl.style.gridColumn = '1';
              optionsEl.style.gridRow = '3';
              optionsEl.style.width = '100%';
              optionsEl.style.maxWidth = '100%';
              optionsEl.style.alignSelf = 'start';
              optionsEl.style.justifySelf = 'stretch';
              optionsEl.style.flex = '';
              optionEls.forEach((optEl) => { optEl.style.width = '100%'; });
            }
          }
          styleMediaPanelChildren(fontSize);
          scaleTableMediaToPanel();
        } else if (hasFigureMedia && mediaPanel) {
          // Hình/biểu đồ nằm sát mép phải và mép dưới của màn chiếu.
          // Ảnh luôn được phóng/thu đồng tỷ lệ để tận dụng tối đa khung 2/3 chiều rộng hoặc 2/3 chiều cao.
          const colGap = Math.max(8, Math.round(fontSize * 0.12));

          cardEl.style.display = 'grid';
          cardEl.style.position = 'relative';
          cardEl.style.gridTemplateRows = 'auto minmax(0, 1fr)';
          cardEl.style.rowGap = `${questionGap}px`;
          cardEl.style.alignItems = 'start';
          cardEl.style.alignContent = 'stretch';

          // Dùng khung tối đa tạm thời để tính việc thu nhỏ, sau đó co khung theo ảnh thật.
          mediaPanel.style.width = `${FIGURE_MAX_W}px`;
          mediaPanel.style.minWidth = '0px';
          mediaPanel.style.maxWidth = `${FIGURE_MAX_W}px`;
          mediaPanel.style.height = `${FIGURE_MAX_H}px`;
          mediaPanel.style.minHeight = '0px';
          mediaPanel.style.maxHeight = `${FIGURE_MAX_H}px`;
          mediaPanel.style.padding = '0px';
          mediaPanel.style.overflow = 'hidden';
          mediaPanel.style.display = 'flex';
          mediaPanel.style.flexDirection = 'column';
          mediaPanel.style.gap = '6px';
          mediaPanel.style.alignItems = 'flex-end';
          mediaPanel.style.justifyContent = 'flex-end';
          mediaPanel.style.position = 'absolute';
          mediaPanel.style.right = '0px';
          mediaPanel.style.bottom = '0px';
          mediaPanel.style.left = '';
          mediaPanel.style.top = '';
          mediaPanel.style.margin = '0';
          mediaPanel.style.zIndex = '0';
          styleMediaPanelChildren(fontSize);

          const fittedMedia = measureImageMediaFittedSize();
          const panelW = Math.max(1, Math.min(FIGURE_MAX_W, fittedMedia.width || 1));
          const panelH = Math.max(1, Math.min(FIGURE_MAX_H, fittedMedia.height || 1));
          const blankLeft = Math.max(0, Math.min(panelW * 0.32, Number(fittedMedia.leftInset) || 0));
          // Phần nền trắng bên trái của ảnh được dùng làm chiều rộng cho ô phương án;
          // mép phải của ô chỉ cách nét hình một khe nhỏ, nhưng không che nội dung ảnh.
          const visibleRightW = Math.max(1, panelW - blankLeft);
          const rightW = Math.min(contentW, visibleRightW);
          const leftW = Math.max(260, contentW - rightW - colGap);

          cardEl.style.gridTemplateColumns = `${leftW}px ${rightW}px`;
          cardEl.style.columnGap = `${colGap}px`;

          if (questionEl) {
            questionEl.style.gridColumn = '1 / span 2';
            questionEl.style.gridRow = '1';
            questionEl.style.alignSelf = 'start';
            questionEl.style.justifySelf = 'stretch';
            questionEl.style.maxWidth = '100%';
            questionEl.style.position = 'relative';
            questionEl.style.zIndex = '1';
          }
          if (optionsEl) {
            optionsEl.classList.add('is-stacked');
            optionsEl.style.display = 'grid';
            optionsEl.style.gridTemplateColumns = 'minmax(0, 1fr)';
            optionsEl.style.columnGap = '0px';
            optionsEl.style.justifyItems = 'stretch';
            optionsEl.style.gridColumn = '1';
            optionsEl.style.gridRow = '2';
            optionsEl.style.width = '100%';
            optionsEl.style.maxWidth = '100%';
            optionsEl.style.alignSelf = 'start';
            optionsEl.style.justifySelf = 'stretch';
            optionsEl.style.position = 'relative';
            optionsEl.style.zIndex = '1';
            optionEls.forEach((optEl) => { optEl.style.width = '100%'; });
          }

          mediaPanel.style.width = `${panelW}px`;
          mediaPanel.style.height = `${panelH}px`;
          mediaPanel.style.maxWidth = `${FIGURE_MAX_W}px`;
          mediaPanel.style.maxHeight = `${FIGURE_MAX_H}px`;
          mediaPanel.style.alignSelf = 'end';
          mediaPanel.style.justifySelf = 'end';
          styleMediaPanelChildren(fontSize);
        } else if (optionsEl) {
          cardEl.style.display = 'flex';
          cardEl.style.flexDirection = 'column';
          cardEl.style.rowGap = '0px';
          // Mọi phương án A/B/C/D được xếp thành 01 cột, không đổi lại 2 hoặc 4 cột.
          optionsEl.classList.add('is-stacked');
          optionsEl.style.display = 'grid';
          optionsEl.style.gridTemplateColumns = 'minmax(0, 1fr)';
          optionsEl.style.columnGap = '0px';
          optionsEl.style.justifyItems = 'stretch';
          optionEls.forEach((optEl) => { optEl.style.width = '100%'; });
        }

        cv7991RefreshSingleLineOptionClasses(cardEl);
        // The one-line class changes inline formatting; rerun centring with the final context.
        setFormulaScale(fontSize);
      };

      const measureLayout = () => {
        const cardRect = cardEl.getBoundingClientRect();
        const questionRect = questionEl ? questionEl.getBoundingClientRect() : null;
        const optionsRect = optionsEl ? optionsEl.getBoundingClientRect() : null;
        const mediaRect = mediaPanel ? mediaPanel.getBoundingClientRect() : null;
        const top = questionRect ? questionRect.top : cardRect.top + padY;
        const bottom = Math.max(
          questionRect ? questionRect.bottom : cardRect.top + padY,
          optionsRect ? optionsRect.bottom : cardRect.top + padY,
          mediaRect ? mediaRect.bottom : cardRect.top + padY
        );
        const right = Math.max(
          questionRect ? questionRect.right : cardRect.left + padX,
          optionsRect ? optionsRect.right : cardRect.left + padX,
          mediaRect ? mediaRect.right : cardRect.left + padX
        );
        const left = Math.min(
          questionRect ? questionRect.left : cardRect.left + padX,
          optionsRect ? optionsRect.left : cardRect.left + padX,
          mediaRect ? mediaRect.left : cardRect.left + padX
        );
        const usedHeight = Math.max(1, bottom - top);
        const usedWidth = Math.max(1, right - left);
        const tableChildFits = !hasTableMedia || !mediaPanel || !mediaRect
          || Array.from(mediaPanel.children).every((child) => {
            if (!(child instanceof HTMLElement)) return true;
            const isTable = child.classList.contains('single-exam-inline-table') || child.matches('table');
            if (!isTable) return true;
            const rect = child.getBoundingClientRect();
            return rect.width <= mediaRect.width + 1
              && rect.height <= mediaRect.height + 1
              && rect.left >= mediaRect.left - 1
              && rect.right <= mediaRect.right + 1
              && rect.top >= mediaRect.top - 1
              && rect.bottom <= mediaRect.bottom + 1;
          });
        const edgeAlignedFigure = hasFigureMedia && !hasTableMedia;
        const rightLimit = hasVerticalTable ? cardRect.right + 1 : cardRect.right - padX + 1;
        const bottomLimit = hasVerticalTable ? cardRect.bottom + 1 : cardRect.bottom - padY + 1;
        const mediaRightLimit = edgeAlignedFigure ? cardRect.right + 1 : rightLimit;
        const mediaBottomLimit = edgeAlignedFigure ? cardRect.bottom + 1 : bottomLimit;
        const allowedWidth = (hasVerticalTable || edgeAlignedFigure) ? OUT_W + 1 : contentW + 1;
        const allowedHeight = (hasVerticalTable || edgeAlignedFigure) ? OUT_H + 1 : contentH + 1;
        const figureQuestionClear = !edgeAlignedFigure || !questionRect || !mediaRect
          || questionRect.bottom <= mediaRect.top + 1
          || questionRect.right <= mediaRect.left + 1;
        const optionOverflow = optionEls.some((optEl) => {
          if (!(optEl instanceof HTMLElement)) return false;
          const optRect = optEl.getBoundingClientRect();
          const visibleWidth = Math.max(1, optRect.width);
          const visibleHeight = Math.max(1, optRect.height);
          const selfOverflow = (optEl.scrollWidth > visibleWidth + 1.5) || (optEl.scrollHeight > visibleHeight + 2);
          const childOverflow = Array.from(optEl.querySelectorAll('.single-exam-word-option-body, .single-exam-inline-formula, .single-exam-inline-vector, img, svg, canvas, table')).some((child) => {
            if (!(child instanceof Element)) return false;
            const childRect = child.getBoundingClientRect();
            return childRect.right > optRect.right + 1 || childRect.bottom > optRect.bottom + 1;
          });
          return selfOverflow || childOverflow;
        });
        const optionOverlap = optionEls.some((optEl, index) => {
          if (!(optEl instanceof HTMLElement)) return false;
          const a = optEl.getBoundingClientRect();
          return optionEls.slice(index + 1).some((other) => {
            if (!(other instanceof HTMLElement)) return false;
            const b = other.getBoundingClientRect();
            const overlapX = Math.min(a.right, b.right) - Math.max(a.left, b.left);
            const overlapY = Math.min(a.bottom, b.bottom) - Math.max(a.top, b.top);
            return overlapX > 2 && overlapY > 2;
          });
        });
        const fit = usedHeight <= allowedHeight
          && usedWidth <= allowedWidth
          && tableChildFits
          && figureQuestionClear
          && !optionOverflow
          && !optionOverlap
          && (!questionRect || questionRect.right <= rightLimit)
          && (!optionsRect || (optionsRect.right <= rightLimit && optionsRect.bottom <= bottomLimit))
          && (!mediaRect || (mediaRect.right <= mediaRightLimit && mediaRect.bottom <= mediaBottomLimit));
        const fillScore = (usedHeight / Math.max(1, contentH)) * 100 + (usedWidth / Math.max(1, contentW)) * 35 + (mediaRect ? 12 : 0);
        return { fit, usedHeight, usedWidth, fillScore, optionOverflow, optionOverlap };
      };

      let best = null;
      for (const fontSize of fontSizes) {
        let bestAtThisSize = null;
        for (const mode of layoutModes) {
          applyLayout(fontSize, mode);
          await new Promise((resolve) => requestAnimationFrame(resolve));
          const measured = measureLayout();
          if (!measured.fit) continue;
          const candidate = { fontSize, mode, measured };
          if (!bestAtThisSize || measured.fillScore > bestAtThisSize.measured.fillScore) bestAtThisSize = candidate;
        }
        if (bestAtThisSize) {
          best = bestAtThisSize;
          break;
        }
      }

      if (!best) best = { fontSize: hasTableMedia ? minFontSize : (hasMathFormula ? 28 : 30), mode: layoutModes[0] || 'stack' };
      applyLayout(best.fontSize, best.mode);
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));

      const sourceCanvas = await html2canvas(cardEl, {
        backgroundColor: '#ffffff',
        useCORS: true,
        allowTaint: false,
        scale: 2,
        logging: false,
        width: OUT_W,
        height: OUT_H,
        windowWidth: OUT_W,
        windowHeight: OUT_H,
        scrollX: 0,
        scrollY: 0,
      });
      return sourceCanvas.toDataURL('image/png');
    }

    async function cv7991RenderSingleExamSlidesToImages(slides, statusPrefix = 'Đang chuyển toàn bộ câu hỏi thành ảnh') {
      const list = Array.isArray(slides) ? slides : [];
      if (!list.length) return list;
      const targets = list
        .map((item, idx) => ({ item, idx }))
        .filter(({ item }) => item && !String(item.imageDataUrl || '').trim());
      if (!targets.length) return list;
      for (let pos = 0; pos < targets.length; pos += 1) {
        const { item, idx } = targets[pos];
        if (typeof setCv7991BankStatus === 'function') {
          setCv7991BankStatus(`${statusPrefix}... ${pos + 1}/${targets.length}`, '');
        }
        try {
          item.imageDataUrl = await cv7991RenderSingleExamSlideImage(item, idx + 1);
          if (item.imageDataUrl) {
            item.promptHtml = '';
            item.prompt = '';
            (Array.isArray(item.options) ? item.options : []).forEach((opt) => {
              if (!opt) return;
              opt.html = '';
              opt.text = '';
            });
          }
        } catch (error) {
          console.warn('Không tạo được ảnh cho câu', idx + 1, error);
          item.imageDataUrl = '';
        }
      }
      return list;
    }

    let singleExamCountdownTimer = null;
    let singleExamCountdownEndAt = 0;
    let singleExamCountdownInitialSeconds = 0;
    let singleExamCountdownLastTickSecond = null;
    let singleExamWheelAnswerCountdownActive = false;
    let singleExamWheelAnswerPreviousValue = '';
    let singleExamBellAudioContext = null;

    function formatSingleExamCountdown(seconds) {
      const value = Math.max(0, Math.floor(Number(seconds) || 0));
      return `${value}s`;
    }

    function removeSingleExamCountdownLiveOption() {
      const select = els.singleExamCountdownInput;
      if (!select) return;
      select.querySelectorAll('option[data-countdown-live="1"]').forEach((option) => option.remove());
    }

    function showSingleExamCountdownLiveValue(seconds) {
      const select = els.singleExamCountdownInput;
      if (!select) return;
      removeSingleExamCountdownLiveOption();
      const value = Math.max(0, Math.floor(Number(seconds) || 0));
      const option = document.createElement('option');
      option.value = `countdown-${value}`;
      option.textContent = formatSingleExamCountdown(value);
      option.setAttribute('data-countdown-live', '1');
      select.appendChild(option);
      select.value = option.value;
    }

    function prepareSingleExamBellAudio() {
      const AudioContextClass = window.AudioContext || window.webkitAudioContext;
      if (!AudioContextClass) return null;
      try {
        if (!singleExamBellAudioContext || singleExamBellAudioContext.state === 'closed') {
          singleExamBellAudioContext = new AudioContextClass();
        }
        if (singleExamBellAudioContext.state !== 'running') {
          const resumeResult = singleExamBellAudioContext.resume();
          if (resumeResult && typeof resumeResult.catch === 'function') resumeResult.catch(() => {});
        }
        return singleExamBellAudioContext;
      } catch (_) {
        return null;
      }
    }

    function playSingleExamCountdownTick() {
      const audioContext = prepareSingleExamBellAudio();
      if (!audioContext) return;
      try {
        const startAt = audioContext.currentTime + 0.01;
        const oscillator = audioContext.createOscillator();
        const gain = audioContext.createGain();
        oscillator.type = 'square';
        oscillator.frequency.setValueAtTime(1180, startAt);
        gain.gain.setValueAtTime(0.0001, startAt);
        gain.gain.exponentialRampToValueAtTime(0.19, startAt + 0.006);
        gain.gain.exponentialRampToValueAtTime(0.0001, startAt + 0.075);
        oscillator.connect(gain);
        gain.connect(audioContext.destination);
        oscillator.start(startAt);
        oscillator.stop(startAt + 0.085);
      } catch (_) {}
    }

    function playSingleExamFinishBell() {
      const audioContext = prepareSingleExamBellAudio();
      if (!audioContext) return;

      try {
        const startAt = audioContext.currentTime + 0.02;
        const masterGain = audioContext.createGain();
        masterGain.gain.setValueAtTime(0.34, startAt);
        masterGain.gain.exponentialRampToValueAtTime(0.0001, startAt + 1.85);
        masterGain.connect(audioContext.destination);

        const partials = [
          { frequency: 784, volume: 0.95, duration: 1.75 },
          { frequency: 1175, volume: 0.48, duration: 1.35 },
          { frequency: 1568, volume: 0.28, duration: 1.05 },
          { frequency: 2352, volume: 0.13, duration: 0.72 }
        ];

        partials.forEach(({ frequency, volume, duration }) => {
          const oscillator = audioContext.createOscillator();
          const partialGain = audioContext.createGain();
          oscillator.type = 'sine';
          oscillator.frequency.setValueAtTime(frequency, startAt);
          partialGain.gain.setValueAtTime(0.0001, startAt);
          partialGain.gain.exponentialRampToValueAtTime(volume, startAt + 0.012);
          partialGain.gain.exponentialRampToValueAtTime(0.0001, startAt + duration);
          oscillator.connect(partialGain);
          partialGain.connect(masterGain);
          oscillator.start(startAt);
          oscillator.stop(startAt + duration + 0.05);
        });

        window.setTimeout(() => {
          try { masterGain.disconnect(); } catch (_) {}
        }, 2100);
      } catch (_) {}
    }

    function readSingleExamCountdownSeconds() {
      const select = els.singleExamCountdownInput;
      if (!select) return 0;
      const rawValue = Number(String(select.value || '').trim());
      if (!Number.isFinite(rawValue) || rawValue <= 0) {
        select.value = '';
        return 0;
      }
      return Math.floor(rawValue);
    }

    function stopSingleExamCountdown(restoreInitial = true) {
      if (singleExamCountdownTimer !== null) {
        window.clearInterval(singleExamCountdownTimer);
        singleExamCountdownTimer = null;
      }
      const initialSeconds = singleExamCountdownInitialSeconds;
      singleExamCountdownEndAt = 0;
      singleExamCountdownInitialSeconds = 0;
      singleExamCountdownLastTickSecond = null;
      if (els.singleExamCountdownInput) {
        els.singleExamCountdownInput.disabled = false;
        els.singleExamCountdownInput.classList.remove('is-running');
        els.singleExamCountdownInput.setAttribute('aria-label', 'Số giây đếm ngược');
        removeSingleExamCountdownLiveOption();
        if (restoreInitial && initialSeconds > 0) {
          els.singleExamCountdownInput.value = String(initialSeconds);
        }
      }
      singleExamWheelAnswerCountdownActive = false;
      singleExamWheelAnswerPreviousValue = '';
    }

    function finishSingleExamCountdown() {
      if (singleExamCountdownTimer !== null) {
        window.clearInterval(singleExamCountdownTimer);
        singleExamCountdownTimer = null;
      }
      singleExamCountdownEndAt = 0;
      if (els.singleExamCountdownInput) {
        showSingleExamCountdownLiveValue(0);
        els.singleExamCountdownInput.setAttribute('aria-label', 'Còn 0 giây');
      }

      const wheelAnswerCountdown = singleExamWheelAnswerCountdownActive;
      const previousValue = singleExamWheelAnswerPreviousValue;
      playSingleExamFinishBell();

      if (wheelAnswerCountdown) {
        // Đồng hồ 5 giây do Vòng quay mở: hết giờ thì tự thoát khỏi trạng thái đếm
        // và trả ô Số giây về đúng lựa chọn giáo viên đã dùng trước đó.
        stopSingleExamCountdown(false);
        if (els.singleExamCountdownInput) {
          els.singleExamCountdownInput.value = previousValue || '';
        }
        document.dispatchEvent(new CustomEvent('mvip-magic-wheel-answer-countdown-finished', {
          detail:{ source:'mvip' }
        }));
        return;
      }

      // Đồng hồ CHÍNH trên thanh công cụ: giữ nguyên hành vi cũ,
      // đồng thời báo cho Vòng quay may mắn biết nó đã về 0.
      stopSingleExamCountdown(true);
      document.dispatchEvent(new CustomEvent('mvip-magic-wheel-main-countdown-finished', {
        detail:{ source:'mvip' }
      }));
    }

    function startSingleExamCountdown(seconds) {
      stopSingleExamCountdown(false);
      if (!els.singleExamCountdownInput || !Number.isFinite(seconds) || seconds <= 0) return;
      singleExamCountdownInitialSeconds = Math.floor(seconds);
      singleExamCountdownLastTickSecond = null;
      singleExamCountdownEndAt = Date.now() + (singleExamCountdownInitialSeconds * 1000);
      els.singleExamCountdownInput.disabled = false;
      els.singleExamCountdownInput.classList.add('is-running');

      const tick = () => {
        if (!els.singleExamCountdownInput || !singleExamCountdownEndAt) return;
        const remaining = Math.max(0, Math.ceil((singleExamCountdownEndAt - Date.now()) / 1000));
        const nextValue = `countdown-${remaining}`;
        if (els.singleExamCountdownInput.value !== nextValue) {
          showSingleExamCountdownLiveValue(remaining);
          els.singleExamCountdownInput.setAttribute('aria-label', `Còn ${remaining} giây`);
        }
        if (remaining >= 1 && remaining <= 5 && singleExamCountdownLastTickSecond !== remaining) {
          singleExamCountdownLastTickSecond = remaining;
          playSingleExamCountdownTick();
        }
        if (remaining <= 0) finishSingleExamCountdown();
      };

      tick();
      singleExamCountdownTimer = window.setInterval(tick, 200);
    }

    window.mvipMagicWheelCountdownHooks = window.mvipMagicWheelCountdownHooks || {};
    window.mvipMagicWheelCountdownHooks.mvip = {
      start(seconds = 5) {
        const duration = Math.max(1, Math.floor(Number(seconds) || 5));
        const select = els.singleExamCountdownInput;
        const currentValue = select ? String(select.value || '') : '';
        const previousValue = currentValue.startsWith('countdown-') ? '' : currentValue;
        prepareSingleExamBellAudio();
        startSingleExamCountdown(duration);
        if (!singleExamCountdownEndAt) return false;
        singleExamWheelAnswerPreviousValue = previousValue;
        singleExamWheelAnswerCountdownActive = true;
        return true;
      }
    };

    // Mỗi lần giáo viên chuyển câu bằng nút mũi tên trong chế độ toàn màn hình,
    // đồng hồ được chạy lại từ số giây đã nhập để tính riêng thời gian cho câu mới.
    function restartSingleExamCountdownAfterQuestionChange() {
      if (!singleExamIsFullscreen()) return;
      const seconds = singleExamCountdownInitialSeconds > 0
        ? singleExamCountdownInitialSeconds
        : readSingleExamCountdownSeconds();
      if (!Number.isFinite(seconds) || seconds <= 0) return;
      prepareSingleExamBellAudio();
      startSingleExamCountdown(seconds);
    }

    function singleExamIsLimitedAccount() {
      const tier = String(state.sessionTier || '').trim().toLowerCase();
      return !state.token || tier === 'guest' || tier === 'limited' || document.body.classList.contains('mvip-tier-limited');
    }

    function showSingleExamUpgradeRequired() {
      if (window.mvipLimitedAccess && window.mvipLimitedAccess.guard('feature')) return;
      openAlertModal('Bạn cần nâng cấp MVIP.', 'Thông báo');
    }

    function singleExamFullscreenElement() {
      return document.fullscreenElement || document.webkitFullscreenElement || null;
    }

    function singleExamIsFullscreen() {
      const presenter = els.singleExamPresenter;
      const nativeFullscreen = !!(presenter && singleExamFullscreenElement() === presenter);
      const fallbackFullscreen = document.body.classList.contains('single-exam-fullscreen-fallback');
      /* single-exam-expanded chỉ là lớp hỗ trợ của chế độ fallback. Nếu lớp này
         còn sót lại sau khi đã thu nhỏ thì không được coi là toàn màn hình, vì nó
         sẽ ép scale(1) và cắt hai mép của nội dung MVIP. */
      if (!nativeFullscreen && !fallbackFullscreen && presenter) {
        presenter.classList.remove('single-exam-expanded');
      } else if (fallbackFullscreen && presenter) {
        presenter.classList.add('single-exam-expanded');
      }
      return nativeFullscreen || fallbackFullscreen;
    }

    function singleExamFullscreenIconSvg(active) {
      if (active) {
        return '<svg aria-hidden="true" class="single-exam-fullscreen-icon" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M21 3L14 10M14 5V10H19M3 21L10 14M10 19V14H5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
      }
      return '<svg aria-hidden="true" class="single-exam-fullscreen-icon" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M14 10L21 3M16 3H21V8M10 14L3 21M8 21H3V16" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
    }

    function updateSingleExamFullscreenButton() {
      syncAlertModalHost();
      const btn = els.singleExamFullscreenBtn;
      const expanded = singleExamIsFullscreen();
      if (btn) {
        const label = expanded ? 'Thu nhỏ khỏi toàn màn hình' : 'Phóng to toàn màn hình';
        btn.innerHTML = singleExamFullscreenIconSvg(expanded);
        btn.title = label;
        btn.setAttribute('aria-label', label);
        btn.setAttribute('aria-pressed', expanded ? 'true' : 'false');
        btn.classList.toggle('is-fullscreen', expanded);
      }
      if (els.singleExamCloseBtn) els.singleExamCloseBtn.hidden = false;
    }

    let regularTestWordFullscreenTransitionTimers = [];

    function scheduleRegularTestWordFullscreenTransitionFit() {
      regularTestWordFullscreenTransitionTimers.forEach((timer) => clearTimeout(timer));
      regularTestWordFullscreenTransitionTimers = [];
      regularTestWordFitLastSignature = '';
      regularTestWordFitDirty = true;
      const run = () => {
        if (!els.singleExamSlide
          || !els.singleExamSlide.classList.contains('single-exam-word-live-mode')) return;
        regularTestWordFitLastSignature = '';
        scheduleRegularTestWordFit(true);
      };
      requestAnimationFrame(() => requestAnimationFrame(run));
      [70, 180, 360, 650].forEach((delay) => {
        regularTestWordFullscreenTransitionTimers.push(setTimeout(run, delay));
      });
    }

    function exitSingleExamFullscreen() {
      stopSingleExamCountdown(true);
      document.body.classList.remove('single-exam-fullscreen-fallback');
      if (els.singleExamPresenter) els.singleExamPresenter.classList.remove('single-exam-expanded');
      const fsElement = singleExamFullscreenElement();
      let exitResult = null;
      if (fsElement === els.singleExamPresenter) {
        try {
          exitResult = document.exitFullscreen
            ? document.exitFullscreen()
            : (document.webkitExitFullscreen ? document.webkitExitFullscreen() : null);
          if (exitResult && typeof exitResult.catch === 'function') exitResult.catch(() => {});
        } catch (_) {}
      }
      updateSingleExamFullscreenButton();
      scheduleRegularTestWordFullscreenTransitionFit();
      if (exitResult && typeof exitResult.then === 'function') {
        const settleAfterExit = () => {
          updateSingleExamFullscreenButton();
          scheduleRegularTestWordFullscreenTransitionFit();
        };
        exitResult.then(settleAfterExit, settleAfterExit);
      }
    }

    async function toggleSingleExamFullscreen() {
      const presenter = els.singleExamPresenter;
      if (!presenter) return;
      if (singleExamIsFullscreen()) {
        exitSingleExamFullscreen();
        return;
      }
      if (singleExamIsLimitedAccount()) {
        showSingleExamUpgradeRequired();
        return;
      }
      const countdownSeconds = readSingleExamCountdownSeconds();
      if (countdownSeconds > 0) prepareSingleExamBellAudio();
      document.body.classList.remove('single-exam-fullscreen-fallback');
      presenter.classList.remove('single-exam-expanded');
      try {
        if (presenter.requestFullscreen) {
          await presenter.requestFullscreen();
        } else if (presenter.webkitRequestFullscreen) {
          presenter.webkitRequestFullscreen();
        } else {
          document.body.classList.add('single-exam-fullscreen-fallback');
          presenter.classList.add('single-exam-expanded');
        }
      } catch (_) {
        document.body.classList.add('single-exam-fullscreen-fallback');
        presenter.classList.add('single-exam-expanded');
      }
      updateSingleExamFullscreenButton();
      scheduleRegularTestWordFullscreenTransitionFit();
      if (countdownSeconds > 0) startSingleExamCountdown(countdownSeconds);
    }

    function handleSingleExamFullscreenChange() {
      const presenter = els.singleExamPresenter;
      const nativeFullscreen = !!(presenter && singleExamFullscreenElement() === presenter);
      const fallbackFullscreen = document.body.classList.contains('single-exam-fullscreen-fallback');
      if (!nativeFullscreen && !fallbackFullscreen && presenter) {
        presenter.classList.remove('single-exam-expanded');
      }
      updateSingleExamFullscreenButton();
      if (!singleExamIsFullscreen()) stopSingleExamCountdown(true);
      scheduleRegularTestWordFullscreenTransitionFit();
    }

    function singleExamRegionToolState() {
      if (!state.singleExamRegionTool || typeof state.singleExamRegionTool !== 'object') {
        state.singleExamRegionTool = { selecting: false, zoomed: false, dragActive: false, selection: null };
      }
      return state.singleExamRegionTool;
    }

    function singleExamRegionWrap() {
      if (!els.singleExamSlide) return null;
      return els.singleExamSlide.querySelector('.single-exam-image-wrap')
        || els.singleExamSlide.querySelector('.regular-test-word-viewport');
    }

    function singleExamLiveWordRegionViewport() {
      return els.singleExamSlide
        ? els.singleExamSlide.querySelector('.regular-test-word-viewport')
        : null;
    }

    function singleExamRegionImage() {
      const wrap = singleExamRegionWrap();
      return wrap ? wrap.querySelector('.single-exam-captured-image') : null;
    }

    function singleExamRegionMetrics() {
      const wrap = singleExamRegionWrap();
      const img = singleExamRegionImage();
      if (!wrap || !img || !img.naturalWidth || !img.naturalHeight) return null;
      const wrapRect = wrap.getBoundingClientRect();
      const scale = Math.min(wrapRect.width / img.naturalWidth, wrapRect.height / img.naturalHeight);
      const displayWidth = img.naturalWidth * scale;
      const displayHeight = img.naturalHeight * scale;
      const offsetX = (wrapRect.width - displayWidth) / 2;
      const offsetY = (wrapRect.height - displayHeight) / 2;
      return { wrap, img, wrapRect, displayWidth, displayHeight, offsetX, offsetY };
    }

    function clampSingleExamRegionRect(rect, metrics) {
      if (!rect || !metrics) return null;
      const minX = metrics.offsetX;
      const minY = metrics.offsetY;
      const maxX = metrics.offsetX + metrics.displayWidth;
      const maxY = metrics.offsetY + metrics.displayHeight;
      const left = Math.max(minX, Math.min(rect.x, rect.x + rect.width));
      const top = Math.max(minY, Math.min(rect.y, rect.y + rect.height));
      const right = Math.min(maxX, Math.max(rect.x, rect.x + rect.width));
      const bottom = Math.min(maxY, Math.max(rect.y, rect.y + rect.height));
      return { x: left, y: top, width: Math.max(0, right - left), height: Math.max(0, bottom - top) };
    }

    function updateSingleExamRegionButton() {
      const btn = els.singleExamRegionBtn;
      if (!btn) return;
      const tool = singleExamRegionToolState();
      const hasRegionSource = !!singleExamRegionImage() || !!singleExamLiveWordRegionViewport();
      btn.hidden = !hasRegionSource;
      btn.disabled = !hasRegionSource;
      let label = 'Quét vùng';
      if (tool.zoomed) label = 'Trở lại';
      else if (tool.selecting) label = 'Hủy quét';
      btn.textContent = label;
      btn.title = label;
      btn.setAttribute('aria-label', label);
      btn.classList.toggle('is-selecting', !!tool.selecting);
      btn.classList.toggle('is-zoomed', !!tool.zoomed);
    }

    function resetSingleExamRegionTool(options = {}) {
      const tool = singleExamRegionToolState();
      const keepZoom = !!(options && options.keepZoom);
      tool.selecting = false;
      tool.dragActive = false;
      if (!keepZoom) tool.zoomed = false;
      tool.selection = keepZoom ? tool.selection : null;
      tool.startX = 0; tool.startY = 0;
      const wrap = singleExamRegionWrap();
      if (wrap) {
        wrap.classList.remove('single-exam-region-selecting', 'word-presentation-region-selecting');
        if (!keepZoom) wrap.classList.remove('single-exam-region-zoomed');
        wrap.querySelectorAll('.single-exam-region-overlay, .word-presentation-region-overlay').forEach((overlay) => overlay.remove());
        if (!keepZoom) {
          wrap.querySelectorAll('.single-exam-region-zoom-pane, .word-presentation-region-zoom-pane').forEach((pane) => pane.remove());
        }
      }
      const img = singleExamRegionImage();
      if (img && !keepZoom) img.classList.remove('single-exam-region-base-hidden');
      const liveFitLayer = els.singleExamSlide
        ? els.singleExamSlide.querySelector('.regular-test-word-fit-layer')
        : null;
      if (liveFitLayer && !keepZoom) liveFitLayer.classList.remove('word-presentation-region-base-hidden');
      updateSingleExamRegionButton();
    }

    // Region selections use the visible viewport's CSS coordinates. Keep the
    // source's measured size/position: replacing its width with viewport.width
    // changes auto margins and percentage translations, shifting the crop.
    function cv7991PinRegionLayerToViewport(element, viewport) {
      if (!(element instanceof HTMLElement) || !(viewport instanceof HTMLElement)) return;
      Object.entries({
        position: 'absolute', inset: 'auto',
        left: `${viewport.scrollLeft}px`, top: `${viewport.scrollTop}px`,
        width: `${Math.max(1, viewport.clientWidth)}px`,
        height: `${Math.max(1, viewport.clientHeight)}px`,
        margin: '0', padding: '0', border: '0', 'box-sizing': 'border-box'
      }).forEach(([key, value]) => element.style.setProperty(key, value, 'important'));
    }

    function cv7991RegionPointerPoint(event, overlay) {
      const rect = overlay.getBoundingClientRect();
      const width = Math.max(1, overlay.clientWidth);
      const height = Math.max(1, overlay.clientHeight);
      return {
        x: Math.max(0, Math.min(width, (event.clientX - rect.left) * width / Math.max(.01, rect.width))),
        y: Math.max(0, Math.min(height, (event.clientY - rect.top) * height / Math.max(.01, rect.height)))
      };
    }

    function cv7991CreateRegionZoomPane(viewport, fitLayer, selection) {
      const vw = Math.max(1, viewport.clientWidth);
      const vh = Math.max(1, viewport.clientHeight);
      const viewportRect = viewport.getBoundingClientRect();
      const sourceRect = fitLayer.getBoundingClientRect();
      const viewportScaleX = viewportRect.width / Math.max(1, viewport.offsetWidth);
      const viewportScaleY = viewportRect.height / Math.max(1, viewport.offsetHeight);
      const sourceStyle = getComputedStyle(fitLayer);
      const px = (name) => parseFloat(sourceStyle.getPropertyValue(name)) || 0;
      const borderBox = sourceStyle.boxSizing === 'border-box';
      const sourceWidth = Math.max(1, (parseFloat(sourceStyle.width) || fitLayer.offsetWidth)
        + (borderBox ? 0 : px('padding-left') + px('padding-right') + px('border-left-width') + px('border-right-width')));
      const sourceHeight = Math.max(1, (parseFloat(sourceStyle.height) || fitLayer.offsetHeight)
        + (borderBox ? 0 : px('padding-top') + px('padding-bottom') + px('border-top-width') + px('border-bottom-width')));
      const pane = document.createElement('div');
      pane.className = 'word-presentation-region-zoom-pane';
      cv7991PinRegionLayerToViewport(pane, viewport);
      const scale = Math.min(12, Math.max(1, Math.min(vw / selection.width, vh / selection.height)));
      const scene = document.createElement('div');
      scene.className = 'word-presentation-region-zoom-scene';
      scene.style.width = `${vw}px`;
      scene.style.height = `${vh}px`;
      scene.style.transform = `translate(${vw / 2}px, ${vh / 2}px) scale(${scale}) translate(${-selection.left - selection.width / 2}px, ${-selection.top - selection.height / 2}px)`;
      const clone = fitLayer.cloneNode(true);
      clone.classList.remove('word-presentation-region-base-hidden');
      clone.removeAttribute('id');
      clone.querySelectorAll('[id]').forEach((element) => element.removeAttribute('id'));
      clone.setAttribute('aria-hidden', 'true');
      // The root is axis-aligned in all presenter layouts. Its measured bounds
      // include centering, fit/zoom and scroll; child text/shapes retain their
      // original layout and are enlarged together without a new line wrap.
      Object.entries({
        position: 'absolute',
        left: `${(sourceRect.left - viewportRect.left) / viewportScaleX - viewport.clientLeft}px`,
        top: `${(sourceRect.top - viewportRect.top) / viewportScaleY - viewport.clientTop}px`,
        right: 'auto', bottom: 'auto', margin: '0',
        width: `${sourceWidth}px`, height: `${sourceHeight}px`,
        'min-width': '0', 'min-height': '0', 'max-width': 'none', 'max-height': 'none',
        'box-sizing': 'border-box', zoom: '1', 'transform-origin': '0 0',
        transform: `scale(${sourceRect.width / (sourceWidth * viewportScaleX)}, ${sourceRect.height / (sourceHeight * viewportScaleY)})`
      }).forEach(([key, value]) => clone.style.setProperty(key, value, 'important'));
      scene.appendChild(clone);
      pane.appendChild(scene);
      viewport.appendChild(pane);
      const sources = [fitLayer, ...fitLayer.querySelectorAll('*')];
      const clones = [clone, ...clone.querySelectorAll('*')];
      sources.forEach((element, index) => {
        const copy = clones[index];
        if (!copy) return;
        if (element.scrollLeft) copy.scrollLeft = element.scrollLeft;
        if (element.scrollTop) copy.scrollTop = element.scrollTop;
        if (element instanceof HTMLCanvasElement && copy instanceof HTMLCanvasElement) {
          try {
            copy.width = element.width;
            copy.height = element.height;
            const context = copy.getContext('2d');
            if (context) context.drawImage(element, 0, 0);
          } catch (_) {}
        }
      });
      return pane;
    }

    function singleExamLiveRegionSelectionRect(viewport, startX, startY, endX, endY) {
      const left = Math.max(0, Math.min(startX, endX));
      const top = Math.max(0, Math.min(startY, endY));
      const right = Math.min(viewport.clientWidth, Math.max(startX, endX));
      const bottom = Math.min(viewport.clientHeight, Math.max(startY, endY));
      return { left, top, width:Math.max(0, right - left), height:Math.max(0, bottom - top) };
    }

    function applySingleExamLiveRegionZoom(selection, viewport) {
      if (!(viewport instanceof HTMLElement) || !selection || selection.width < 24 || selection.height < 24) {
        resetSingleExamRegionTool();
        return;
      }
      const fitLayer = viewport.querySelector('.regular-test-word-fit-layer');
      if (!(fitLayer instanceof HTMLElement)) {
        resetSingleExamRegionTool();
        return;
      }
      const tool = singleExamRegionToolState();
      viewport.querySelectorAll('.word-presentation-region-overlay').forEach((element) => element.remove());
      viewport.classList.remove('word-presentation-region-selecting');
      cv7991CreateRegionZoomPane(viewport, fitLayer, selection);
      fitLayer.classList.add('word-presentation-region-base-hidden');
      tool.selecting = false;
      tool.zoomed = true;
      tool.dragActive = false;
      tool.selection = selection;
      updateSingleExamRegionButton();
    }

    function startSingleExamLiveRegionSelection(viewport) {
      if (!(viewport instanceof HTMLElement)) return;
      resetSingleExamRegionTool();
      const tool = singleExamRegionToolState();
      tool.selecting = true;
      const overlay = document.createElement('div');
      overlay.className = 'word-presentation-region-overlay';
      cv7991PinRegionLayerToViewport(overlay, viewport);
      const box = document.createElement('div');
      box.className = 'word-presentation-region-selection-box';
      overlay.appendChild(box);
      viewport.appendChild(overlay);
      viewport.classList.add('word-presentation-region-selecting');
      const point = (event) => cv7991RegionPointerPoint(event, overlay);
      const draw = (endX, endY) => {
        const selection = singleExamLiveRegionSelectionRect(viewport, tool.startX, tool.startY, endX, endY);
        box.style.display = 'block';
        box.style.left = `${selection.left}px`;
        box.style.top = `${selection.top}px`;
        box.style.width = `${selection.width}px`;
        box.style.height = `${selection.height}px`;
        tool.selection = selection;
        return selection;
      };
      overlay.addEventListener('pointerdown', (event) => {
        if (event.button !== 0) return;
        event.preventDefault();
        const p = point(event);
        tool.dragActive = true;
        tool.pointerId = event.pointerId;
        tool.startX = p.x;
        tool.startY = p.y;
        try { overlay.setPointerCapture(event.pointerId); } catch (_) {}
        draw(p.x, p.y);
      });
      overlay.addEventListener('pointermove', (event) => {
        if (!tool.dragActive || tool.pointerId !== event.pointerId) return;
        const p = point(event);
        draw(p.x, p.y);
      });
      const finish = (event) => {
        if (!tool.dragActive || tool.pointerId !== event.pointerId) return;
        event.preventDefault();
        const p = point(event);
        const selection = draw(p.x, p.y);
        tool.dragActive = false;
        try { overlay.releasePointerCapture(event.pointerId); } catch (_) {}
        applySingleExamLiveRegionZoom(selection, viewport);
      };
      overlay.addEventListener('pointerup', finish);
      overlay.addEventListener('pointercancel', () => resetSingleExamRegionTool());
      updateSingleExamRegionButton();
    }

    function startSingleExamRegionSelection() {
      const liveViewport = singleExamLiveWordRegionViewport();
      if (liveViewport) {
        startSingleExamLiveRegionSelection(liveViewport);
        return;
      }
      const metrics = singleExamRegionMetrics();
      if (!metrics) return;
      resetSingleExamRegionTool();
      const tool = singleExamRegionToolState();
      tool.selecting = true;
      const overlay = document.createElement('div');
      overlay.className = 'single-exam-region-overlay';
      const box = document.createElement('div');
      box.className = 'single-exam-region-selection-box';
      box.hidden = true;
      overlay.appendChild(box);
      metrics.wrap.appendChild(overlay);
      metrics.wrap.classList.add('single-exam-region-selecting');

      const localPoint = (event) => {
        const rect = overlay.getBoundingClientRect();
        return { x: event.clientX - rect.left, y: event.clientY - rect.top };
      };
      const drawRect = (rawRect) => {
        const clamped = clampSingleExamRegionRect(rawRect, metrics);
        if (!clamped || clamped.width <= 0 || clamped.height <= 0) {
          box.hidden = true;
          tool.selection = null;
          return;
        }
        box.hidden = false;
        box.style.left = `${clamped.x}px`;
        box.style.top = `${clamped.y}px`;
        box.style.width = `${clamped.width}px`;
        box.style.height = `${clamped.height}px`;
        tool.selection = clamped;
      };

      const cleanupPointer = () => { tool.dragActive = false; };

      overlay.addEventListener('pointerdown', (event) => {
        if (!tool.selecting) return;
        event.preventDefault();
        const point = localPoint(event);
        tool.dragActive = true;
        tool.startX = point.x;
        tool.startY = point.y;
        drawRect({ x: point.x, y: point.y, width: 0, height: 0 });
        if (overlay.setPointerCapture) { try { overlay.setPointerCapture(event.pointerId); } catch (_) {} }
      });

      overlay.addEventListener('pointermove', (event) => {
        if (!tool.selecting || !tool.dragActive) return;
        event.preventDefault();
        const point = localPoint(event);
        drawRect({ x: tool.startX, y: tool.startY, width: point.x - tool.startX, height: point.y - tool.startY });
      });

      overlay.addEventListener('pointerup', (event) => {
        if (!tool.selecting || !tool.dragActive) return;
        event.preventDefault();
        cleanupPointer();
        const selected = tool.selection;
        if (!selected || selected.width < 24 || selected.height < 24) {
          resetSingleExamRegionTool();
          return;
        }
        applySingleExamRegionZoom(selected, metrics);
      });

      overlay.addEventListener('pointercancel', () => {
        if (!tool.selecting) return;
        resetSingleExamRegionTool();
      });

      updateSingleExamRegionButton();
    }

    function applySingleExamRegionZoom(selection, metrics = null) {
      const info = metrics || singleExamRegionMetrics();
      if (!info || !selection) return;
      const tool = singleExamRegionToolState();
      resetSingleExamRegionTool();
      const pane = document.createElement('div');
      pane.className = 'single-exam-region-zoom-pane';
      const clone = document.createElement('img');
      clone.src = info.img.currentSrc || info.img.src;
      clone.alt = info.img.alt || '';
      const scale = Math.min(info.wrapRect.width / selection.width, info.wrapRect.height / selection.height);
      const extraX = (info.wrapRect.width - selection.width * scale) / 2;
      const extraY = (info.wrapRect.height - selection.height * scale) / 2;
      clone.style.width = `${info.displayWidth * scale}px`;
      clone.style.height = `${info.displayHeight * scale}px`;
      clone.style.left = `${extraX - ((selection.x - info.offsetX) * scale)}px`;
      clone.style.top = `${extraY - ((selection.y - info.offsetY) * scale)}px`;
      pane.appendChild(clone);
      info.wrap.appendChild(pane);
      info.wrap.classList.add('single-exam-region-zoomed');
      info.img.classList.add('single-exam-region-base-hidden');
      tool.zoomed = true;
      tool.selection = selection;
      updateSingleExamRegionButton();
    }

    function toggleSingleExamRegionTool() {
      const tool = singleExamRegionToolState();
      if (tool.zoomed) {
        resetSingleExamRegionTool();
        return;
      }
      if (tool.selecting) {
        resetSingleExamRegionTool();
        return;
      }
      startSingleExamRegionSelection();
    }

    function isRegularTestSessionActive() {
      const session = state.regularTestSession || {};
      return !!(session.active && Array.isArray(session.slides) && session.slides.length);
    }

    function refreshSingleExamClassOptions() {
      if (!els.singleExamClassSelect) return;
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const signature = keys.join('\u0001');
      if (els.singleExamClassSelect.dataset.optionsSignature !== signature) {
        els.singleExamClassSelect.innerHTML = ['<option value="">Chọn lớp - môn</option>']
          .concat(keys.map((key) => `<option value="${escapeHtml(key)}">${escapeHtml(key)}</option>`)).join('');
        els.singleExamClassSelect.dataset.optionsSignature = signature;
      }
      const mon = normMonKey(state.currentMon || '');
      els.singleExamClassSelect.value = mon && keys.includes(mon) ? mon : '';
      els.singleExamClassSelect.disabled = !state.token || !keys.length;
      els.singleExamClassSelect.title = keys.length ? 'Chọn Lớp-Môn nhận kết quả quét thẻ' : 'Tài khoản chưa có Lớp-Môn.';
    }

    function selectSingleExamClass(monValue) {
      if (!state.token) return;
      const mon = normMonKey(monValue || '');
      state.currentMon = mon;
      if (els.classSubjectSelect) els.classSubjectSelect.value = mon;
      if (els.compactClassSubjectSelect) els.compactClassSubjectSelect.value = mon;
      if (state.pendingResult) closeResultDialog();
      state.examPreviewDone = false;
      state.questionFrozen = false;
      if (state.regularTestSession && typeof state.regularTestSession === 'object') state.regularTestSession.answerVisible = false;
      buildCurrentRoster();
      setAccountNote();
      renderAll();
      showLoginStatus(mon ? `Đã chuyển Kiểm tra ngay sang Lớp-Môn ${mon}.` : 'Chưa chọn Lớp-Môn cho Kiểm tra ngay.', mon ? 'ok' : 'info');
    }

    function regularTestAnswerToken() {
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const item = Array.isArray(session.slides) ? session.slides[index] : null;
      if (regularTestGroupedTfSlide(item)) {
        return regularTestTfExpectedToken(item, regularTestActiveTfLetter(item));
      }
      return normalizeScanAnswerToken((Array.isArray(session.answers) ? session.answers[index] : '') || '');
    }

    function setRegularTestAnswerButtonActive(active) {
      const session = state.regularTestSession || {};
      session.answerVisible = !!active;
      if (!els.singleExamAnswerBtn) return;
      const slides = Array.isArray(session.slides) ? session.slides : [];
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const item = slides[index] || null;
      const hasGuide = singleExamSlideHasGuide(item);
      els.singleExamAnswerBtn.classList.toggle('is-active', !!active);
      els.singleExamAnswerBtn.setAttribute('aria-pressed', active ? 'true' : 'false');
      els.singleExamAnswerBtn.textContent = active ? (hasGuide ? 'Lời giải' : 'Ẩn đáp án') : 'Đáp án';
      els.singleExamAnswerBtn.title = active
        ? (hasGuide ? 'Xem lời giải đầy đủ của câu hiện tại' : 'Ẩn đáp án của câu hiện tại')
        : 'Mở đáp án của câu hiện tại';
    }

    function clearRegularTestAnswerHighlights() {
      if (!els.singleExamSlide) return;
      els.singleExamSlide.querySelectorAll(
        '.cv7991-answer-correct, .cv7991-answer-wrong, .cv7991-answer-flash, '
        + '.word-presentation-item.is-correct-answer, .word-presentation-item.is-wrong-answer, '
        + '.single-exam-option.is-correct-answer, .single-exam-option.is-wrong-answer, '
        + '.single-exam-word-option.is-correct-answer, .single-exam-word-option.is-wrong-answer'
      ).forEach((element) => element.classList.remove(
        'cv7991-answer-correct', 'cv7991-answer-wrong', 'cv7991-answer-flash', 'is-correct-answer', 'is-wrong-answer'
      ));
      els.singleExamSlide.querySelectorAll('.single-exam-tf-answer-mark, .word-presentation-tf-answer-mark').forEach((element) => element.remove());
      els.singleExamSlide.querySelectorAll('.cv7991-tf-choice-wrong').forEach((button) => button.classList.remove('cv7991-tf-choice-wrong'));
    }

    function currentRegularTestScoreItem() {
      if (!isRegularTestSessionActive()) return null;
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      return { type: regularTestWordQuestionFormat(slide) === 'tf' ? 'true_false' : 'single' };
    }

    function applyRegularTestAnswerHighlight() {
      clearRegularTestAnswerHighlights();
      const session = state.regularTestSession || {};
      const active = !!session.answerVisible && isRegularTestSessionActive();
      setRegularTestAnswerButtonActive(active);
      if (!active || !els.singleExamSlide) return 0;
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const answerInfo = regularTestCurrentAnswerInfo(slide);
      if (!answerInfo.hasAnswer) return 0;
      const token = regularTestAnswerToken();
      const rows = Array.from(els.singleExamSlide.querySelectorAll(
        '.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]'
      ));
      const scanCorrect = state.examPreviewDone && state.selectedCorrect;
      const wanted = new Set(scanCorrect ? [String(scanCorrect).toLowerCase()]
        : Array.from(answerInfo.correctLetters || []).map((value) => String(value || '').trim().toLowerCase()).filter(Boolean));
      if (token && !scanCorrect) wanted.add(String(token).trim().toLowerCase());
      const isTf = regularTestWordQuestionFormat(slide) === 'tf';
      const tfMarks = isTf ? regularTestManualTfMarkMap(slide) : {};
      const revealPulse = Math.max(0, Number(session.answerRevealPulse) || 0);
      const shouldAnimate = revealPulse > 0 && revealPulse !== Math.max(0, Number(session.answerRevealPulseApplied) || 0);
      let marked = 0;
      rows.forEach((row, rowIndex) => {
        const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
        if (isTf) {
          const expected = regularTestExpectedTfMark(slide, key, rowIndex);
          if (!tfMarks[key] || !expected) return;
          row.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]').forEach((button) => {
            const choice = String(button.getAttribute('data-tf-choice') || '').trim().toUpperCase();
            button.classList.toggle('cv7991-tf-choice-wrong', choice === tfMarks[key] && choice !== expected);
          });
          marked += 1;
          return;
        }
        row.classList.remove('is-correct-answer', 'is-wrong-answer', 'cv7991-answer-correct', 'cv7991-answer-wrong', 'cv7991-answer-flash');
        if (!wanted.has(key)) return;
        row.classList.add('cv7991-answer-correct');
        if (shouldAnimate) {
          void row.offsetWidth;
          row.classList.add('cv7991-answer-flash');
        }
        marked += 1;
      });
      if (shouldAnimate) session.answerRevealPulseApplied = revealPulse;
      if (marked && els.singleExamSlide.classList.contains('single-exam-word-live-mode')) scheduleRegularTestWordFit(true);
      return marked;
    }

    function regularTestManualMcIsCorrect(item) {
      const answerInfo = regularTestCurrentAnswerInfo(item);
      const selected = regularTestManualSelectionSet(item);
      if (!answerInfo.hasAnswer || selected.size !== 1) return false;
      const chosen = Array.from(selected)[0];
      return answerInfo.correctLetters.has(chosen)
        || (!!answerInfo.token && String(answerInfo.token).trim().toLowerCase() === chosen);
    }

    function regularTestManualTfCorrectCount(item) {
      const marks = regularTestManualTfMarkMap(item);
      const options = Array.isArray(item && item.options) ? item.options.slice(0, 4) : [];
      let count = 0;
      options.forEach((option, rowIndex) => {
        const key = String(option && option.letter || String.fromCharCode(65 + rowIndex)).trim().toLowerCase();
        const expected = regularTestExpectedTfMark(item, key, rowIndex);
        if (marks[key] && expected && marks[key] === expected) count += 1;
      });
      return Math.max(0, Math.min(4, count));
    }

    function regularTestPlayManualFeedback(item) {
      const format = regularTestWordQuestionFormat(item);
      if (format === 'tf') {
        if (typeof window.cv7991PlayTrueFalseFeedback === 'function') {
          window.cv7991PlayTrueFalseFeedback(regularTestManualTfCorrectCount(item));
        }
      } else if (format === 'mc') {
        if (typeof window.cv7991PlayMultipleChoiceFeedback === 'function') {
          window.cv7991PlayMultipleChoiceFeedback(regularTestManualMcIsCorrect(item));
        }
      }
    }

    function toggleRegularTestAnswerView(event = null) {
      // Khách chưa đăng nhập không được mở đáp án; chặn cả bộ xử lý chia đôi phía sau.
      if (typeof isGuestAccount === 'function' && isGuestAccount()) {
        if (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
        openLimitedUpgradeNotice('answer', 'guest');
        return;
      }
      // Tài khoản limited không được mở đáp án; chặn cả bộ xử lý chia đôi phía sau.
      if (typeof isLimitedAccount === 'function' && isLimitedAccount()) {
        if (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
        openLimitedUpgradeNotice('answer', 'limited');
        return;
      }
      if (!isRegularTestSessionActive()) return;
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      if (index >= session.slides.length) return;
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const answerInfo = regularTestCurrentAnswerInfo(slide);
      const token = regularTestAnswerToken();
      if (session.answerVisible && singleExamSlideHasGuide(slide)) {
        openSingleExamGuide();
        return;
      }
      if (!answerInfo.hasAnswer || (!token && !regularTestGroupedTfSlide(slide))) {
        openAlertModal('Bạn chưa soạn đáp án hoặc đáp án của bạn không đúng mẫu quy định', 'Thông báo');
        return;
      }
      const nextVisible = !session.answerVisible;
      session.answerVisible = nextVisible;
      if (nextVisible) {
        session.answerRevealPulse = Math.max(0, Number(session.answerRevealPulse) || 0) + 1;
        regularTestPlayManualFeedback(slide);
      }
      renderRegularTestPresenter();
    }

    function singleExamSlideHasGuide(item) {
      return !!String(item && item.guide || '').trim()
        || !!String(item && item.guideHtml || '').trim();
    }

    function currentRegularTestSlide() {
      if (!isRegularTestSessionActive()) return null;
      const session = state.regularTestSession || {};
      const slides = Array.isArray(session.slides) ? session.slides : [];
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      return slides[index] || null;
    }

    function currentRegularTestSlideHasGuide() {
      return singleExamSlideHasGuide(currentRegularTestSlide());
    }

    // API chỉ đọc dành cho chế độ Chia đôi màn hình: lấy lời giải của câu hiện tại
    // mà không cần mở modal Hướng dẫn/Lời giải ở nửa trái.
    window.mvipSingleExamSplitSolutionApi = {
      format() {
        const item = currentRegularTestSlide();
        return item ? regularTestWordQuestionFormat(item) : '';
      },
      hasSolution() {
        return singleExamSlideHasGuide(currentRegularTestSlide());
      },
      cloneSolutionNode() {
        const item = currentRegularTestSlide();
        if (!item || !singleExamSlideHasGuide(item)) return null;
        const guideHtml = String(item.guideHtml || '').trim();
        const guideText = String(item.guide || '').trim();
        const wrap = document.createElement('div');
        wrap.className = 'single-exam-guide-text';
        if (guideHtml) wrap.innerHTML = guideHtml;
        else if (guideText) wrap.innerHTML = singleExamTextHtml(guideText);
        else return null;
        return wrap;
      }
    };

    function regularTestQuestionNo() {
      const session = state.regularTestSession || {};
      return Math.max(1, (parseInt(String(session.index || 0), 10) || 0) + 1);
    }

    function setRegularTestStatus(element, message = '', type = '') {
      if (!element) return;
      element.textContent = message || '';
      element.className = 'regular-test-status' + (type ? ` ${type}` : '');
    }

    function setRegularTestTopStatus(message = '', type = '') {
      if (!els.regularTestTopStatus) return;
      const text = String(message || '').trim();
      els.regularTestTopStatus.textContent = text;
      els.regularTestTopStatus.hidden = !text;
      els.regularTestTopStatus.className = 'regular-test-top-status' + (type ? ` ${type}` : '');
    }

    function regularTestNoBankMessage(mon = '') {
      const key = normMonKey(mon || state.currentMon || '');
      const parsed = parseClassSubjectNameForDialog(key);
      const subject = String(parsed && parsed.subject || '').trim() || key || '-';
      const grade = String(parsed && parsed.grade || '').trim();
      const className = String(parsed && parsed.className || '').trim();
      const classText = grade ? `${grade}${className}` : (key || '-');
      return `Xin lỗi, hiện tại môn ${subject} lớp ${classText} này hệ thống chưa có ngân hàng câu hỏi`;
    }

    function openRegularTestNoBankModal(message = '') {
      const text = String(message || regularTestNoBankMessage(state.currentMon || '')).trim();
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      if (els.regularTestNoBankText) els.regularTestNoBankText.textContent = text;
      if (els.regularTestNoBankModal) {
        els.regularTestNoBankModal.hidden = false;
        document.documentElement.classList.add('modal-open');
        if (els.regularTestNoBankCloseBtn) els.regularTestNoBankCloseBtn.focus({ preventScroll:true });
      } else {
        openAlertModal(text, 'Thông báo');
      }
    }

    function closeRegularTestNoBankModal() {
      if (els.regularTestNoBankModal) els.regularTestNoBankModal.hidden = true;
      if ((!els.regularTestQuestionModal || els.regularTestQuestionModal.hidden)
        && (!els.regularTestModal || els.regularTestModal.hidden)
        && (!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden)
        && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
    }

    function setRegularTestChoiceStatus(message = '', type = '') {
      if (!els.regularTestChoiceStatus) return;
      els.regularTestChoiceStatus.textContent = String(message || '');
      els.regularTestChoiceStatus.className = 'regular-choice-status' + (type ? ` ${type}` : '');
    }

    function closeRegularTestChoiceModal() {
      if (els.regularTestChoiceModal) els.regularTestChoiceModal.hidden = true;
      if ((!els.regularTestModal || els.regularTestModal.hidden)
        && (!els.regularTestQuestionModal || els.regularTestQuestionModal.hidden)
        && (!els.regularTestNoBankModal || els.regularTestNoBankModal.hidden)
        && (!els.regularTestSampleModal || els.regularTestSampleModal.hidden)
        && (!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden)
        && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
    }

    function closeRegularTestSampleModal() {
      if (els.regularTestSampleModal) els.regularTestSampleModal.hidden = true;
      if ((!els.regularTestChoiceModal || els.regularTestChoiceModal.hidden)
        && (!els.regularTestModal || els.regularTestModal.hidden)
        && (!els.regularTestQuestionModal || els.regularTestQuestionModal.hidden)
        && (!els.regularTestNoBankModal || els.regularTestNoBankModal.hidden)
        && (!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden)
        && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
    }

    function openRegularTestSampleModal() {
      if (!els.regularTestSampleModal) return;
      els.regularTestSampleModal.hidden = false;
      document.documentElement.classList.add('modal-open');
      if (els.regularTestSampleCloseBtn) els.regularTestSampleCloseBtn.focus({ preventScroll:true });
    }

    function openRegularTestChoiceModal() {
      if (!state.token) throw new Error('Bạn cần đăng nhập trước.');
      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Bạn chọn Lớp-Môn trước khi kiểm tra.');
      if (!sortedStudentKeysFromMap(classDataStudents(mon)).length) throw new Error('Lớp-Môn này chưa có danh sách học sinh.');
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      closeRegularTestNoBankModal();
      setRegularTestChoiceStatus('', '');
      if (els.regularTestChoiceClassText) els.regularTestChoiceClassText.textContent = `Lớp-Môn đang chọn: ${mon}. Chọn nguồn câu hỏi để bắt đầu.`;
      if (els.regularTestChoiceModal) {
        els.regularTestChoiceModal.hidden = false;
        document.documentElement.classList.add('modal-open');
        if (els.regularTestChoiceMvipBtn) els.regularTestChoiceMvipBtn.focus({ preventScroll:true });
      }
    }

    function normalizeRegularTestBankText(value) {
      return String(value || '')
        .normalize('NFD')
        .replace(/[̀-ͯ]/g, '')
        .replace(/đ/g, 'd')
        .replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/[^a-z0-9]+/g, ' ')
        .trim();
    }

    function addRegularTestAlias(list, value) {
      const alias = normalizeRegularTestBankText(value);
      if (alias && !list.includes(alias)) list.push(alias);
    }

    function regularTestSubjectAliases(subject) {
      const normalized = normalizeRegularTestBankText(subject);
      const aliases = [];
      addRegularTestAlias(aliases, normalized);
      if (normalized === 'van' || normalized === 'ngu van') {
        addRegularTestAlias(aliases, 'Văn');
        addRegularTestAlias(aliases, 'Ngữ văn');
        addRegularTestAlias(aliases, 'Ngu_van');
      }
      if (normalized === 'toan') addRegularTestAlias(aliases, 'Toán');
      if (['gddp', 'gd dp', 'gd dia phuong', 'giao duc dia phuong',
        'noi dung giao duc dia phuong', 'giao duc dia phuong gddp'].includes(normalized)) {
        addRegularTestAlias(aliases, 'GDĐP');
        addRegularTestAlias(aliases, 'Giáo dục địa phương');
        addRegularTestAlias(aliases, 'Nội dung giáo dục địa phương');
        addRegularTestAlias(aliases, 'GD_dia_phuong');
        addRegularTestAlias(aliases, 'Giáo dục địa phương (GDĐP)');
      }
      if (normalized === 'gdcd' || normalized === 'giao duc cong dan') {
        addRegularTestAlias(aliases, 'GDCD');
        addRegularTestAlias(aliases, 'Giáo dục công dân');
      }
      if (normalized === 'su dia' || normalized === 'lich su va dia li' || normalized === 'lich su va dia ly') {
        addRegularTestAlias(aliases, 'Sử_Địa');
        addRegularTestAlias(aliases, 'Sử Địa');
        addRegularTestAlias(aliases, 'Lịch sử và Địa lí');
        addRegularTestAlias(aliases, 'Lịch sử và Địa lý');
        addRegularTestAlias(aliases, 'Su_Dia');
      }
      if (normalized === 'khtn' || normalized === 'khoa hoc tu nhien') {
        addRegularTestAlias(aliases, 'KHTN');
        addRegularTestAlias(aliases, 'Khoa học tự nhiên');
      }
      if (normalized === 'cong nghe' || normalized === 'cn') {
        addRegularTestAlias(aliases, 'Công nghệ');
        addRegularTestAlias(aliases, 'CN');
      }
      if (normalized === 'tin hoc' || normalized === 'tin') {
        addRegularTestAlias(aliases, 'Tin học');
        addRegularTestAlias(aliases, 'Tin');
      }
      if (normalized === 'hoa' || normalized === 'hoa hoc') {
        addRegularTestAlias(aliases, 'Hóa');
        addRegularTestAlias(aliases, 'Hóa học');
      }
      if (normalized === 'sinh' || normalized === 'sinh hoc') {
        addRegularTestAlias(aliases, 'Sinh');
        addRegularTestAlias(aliases, 'Sinh học');
      }
      if (normalized === 'vat li' || normalized === 'vat ly' || normalized === 'li' || normalized === 'ly') {
        addRegularTestAlias(aliases, 'Vật lí');
        addRegularTestAlias(aliases, 'Vật lý');
        addRegularTestAlias(aliases, 'Lý');
      }
      if (normalized === 'ngoai ngu 1' || normalized === 'tieng anh' || normalized === 'anh') {
        addRegularTestAlias(aliases, 'Ngoại ngữ 1');
        addRegularTestAlias(aliases, 'Tiếng Anh');
        addRegularTestAlias(aliases, 'Tiếng anh');
        addRegularTestAlias(aliases, 'Anh');
      }
      if (['gdkt pl', 'giao duc kinh te va phap luat', 'giao duc kinh te phap luat'].includes(normalized)) {
        addRegularTestAlias(aliases, 'GDKT-PL');
        addRegularTestAlias(aliases, 'GDKT&PL');
        addRegularTestAlias(aliases, 'Giáo dục kinh tế pháp luật');
        addRegularTestAlias(aliases, 'Giáo dục kinh tế và pháp luật');
      }
      if (normalized === 'hdtn hn' || normalized === 'hoat dong trai nghiem huong nghiep') {
        addRegularTestAlias(aliases, 'HĐTN-HN');
        addRegularTestAlias(aliases, 'HDTN_HN');
        addRegularTestAlias(aliases, 'Hoạt động trải nghiệm, hướng nghiệp');
        addRegularTestAlias(aliases, 'Hoạt động trải nghiệm - Hướng nghiệp');
      }
      return aliases;
    }

    function regularTestBankOptionMatchesParsed(option, parsed) {
      if (!option || !parsed || !parsed.grade || !parsed.subject) return false;
      const grade = String(parsed.grade || '').trim();
      const folderGrade = String(option.dataset && option.dataset.bankFolder || '')
        .replace(/\\/g, '/').match(/(?:^|\/)Khoi_(\d{1,2})(?:\/|$)/i);
      if (folderGrade && Number(folderGrade[1]) !== Number(grade)) return false;
      const aliases = regularTestSubjectAliases(parsed.subject);
      if (!grade || !aliases.length) return false;
      const bankText = normalizeRegularTestBankText(`${option.textContent || ''} ${option.value || ''}`);
      const words = bankText.split(/\s+/).filter(Boolean);
      const compact = bankText.replace(/\s+/g, '');
      const hasGrade = words.includes(grade) || aliases.some((alias) => compact.includes(alias.replace(/\s+/g, '') + grade));
      const hasSubject = aliases.some((alias) => {
        const phrase = ` ${alias} `;
        return (` ${bankText} `).includes(phrase) || compact.includes(alias.replace(/\s+/g, '') + grade);
      });
      return !!(hasGrade && hasSubject);
    }

    function findRegularTestBankOptionForMon(mon) {
      if (!els.cv7991QuestionBankSelect) return null;
      const parsed = parseClassSubjectNameForDialog(mon || state.currentMon || '');
      const options = cv7991GetBankOptionCache().map(cv7991PseudoBankOption);
      const match = options.find((option) => regularTestBankOptionMatchesParsed(option, parsed));
      if (!match) return null;
      return {
        option: match,
        url: String(match.value || '').trim(),
        label: String(match.textContent || '').trim() || String(match.value || '').trim(),
        parsed,
      };
    }

    function selectRegularTestBankForCurrentClass(mon = '') {
      const key = normMonKey(mon || state.currentMon || '');
      syncRegularTestBankOptions();
      const target = findRegularTestBankOptionForMon(key);
      if (!target || !target.url) return null;
      updateCv7991BankSelectForSelection([key]);
      if (els.cv7991QuestionBankSelect) els.cv7991QuestionBankSelect.value = target.url;
      if (els.regularTestBankSelect) els.regularTestBankSelect.value = target.url;
      return target;
    }

    async function ensureRegularTestBankForCurrentClass(mon = '') {
      const key = normMonKey(mon || state.currentMon || '');
      const target = selectRegularTestBankForCurrentClass(key);
      if (!target || !target.url) {
        state.cv7991Bank = null;
        state.cv7991BankCatalog = null;
        updateRegularTestGui();
        setRegularTestTopStatus(regularTestNoBankMessage(key), 'err');
        setRegularTestStatus(els.regularTestRunStatus, '', '');
        throw new Error(regularTestNoBankMessage(key));
      }
      const catalog = state.cv7991BankCatalog;
      if (catalog && String(catalog.url || '') === target.url && Array.isArray(catalog.items) && catalog.items.length) {
        setRegularTestStatus(els.regularTestRunStatus, `Đang kiểm tra danh mục mới nhất của ${target.label}...`, '');
      }
      if (state.cv7991Bank && state.cv7991Bank.source === 'mvip' && String(state.cv7991Bank.url || '') !== target.url) state.cv7991Bank = null;
      if (state.cv7991BankCatalog && String(state.cv7991BankCatalog.url || '') !== target.url) state.cv7991BankCatalog = null;
      updateRegularTestGui();
      setRegularTestStatus(els.regularTestRunStatus, `Đang tải danh mục bài: ${target.label}...`, '');
      const loaded = await loadRegularTestBank({ force: true });
      if (!loaded) throw new Error(regularTestNoBankMessage(key));

      // Đồng bộ catalog vừa load vào state và giữ đúng lựa chọn ngân hàng hiện tại.
      selectCv7991BankSource('mvip');
      if (target && target.url) {
        if (els.cv7991QuestionBankSelect) els.cv7991QuestionBankSelect.value = target.url;
        if (els.regularTestBankSelect) els.regularTestBankSelect.value = target.url;
      }
      state.cv7991BankCatalog = loaded;

      setRegularTestStatus(els.regularTestRunStatus, `Đã tải danh mục ${Number(loaded.items && loaded.items.length || 0)} bài. Câu hỏi chỉ tải khi bấm Sinh đề.`, 'ok');
      return loaded;
    }

    function syncRegularTestBankOptions() {
      if (!els.regularTestBankSelect || !els.cv7991QuestionBankSelect) return;
      const allOptions = cv7991GetBankOptionCache();
      if (allOptions.length) {
        els.regularTestBankSelect.innerHTML = allOptions.map(cv7991BankOptionHtml).join('');
      } else if (!els.regularTestBankSelect.options.length) {
        els.regularTestBankSelect.innerHTML = els.cv7991QuestionBankSelect.innerHTML;
      }
      const current = String(els.cv7991QuestionBankSelect.value || '');
      if (current) els.regularTestBankSelect.value = current;
    }

    function regularTestMcRequests() {
      const requests = [];
      cv7991Items().forEach((item, row) => {
        REGULAR_TEST_FORMATS.forEach((format) => {
          CV7991_LEVELS.forEach((level) => {
            const count = regularTestQuestionCount(item, row, level, format);
            if (count > 0) requests.push({ item, unitKey: item.unitKey || cv7991UnitKey(item.unit), format, level, count });
          });
        });
      });
      return requests;
    }

    function regularTestQuestionSelectionKey(item, row, level, format = 'mc') {
      return `${cv7991MatrixItemStableKey(item, row)}|${format}|${level}`;
    }

    function regularTestQuestionCount(item, row, level, format = 'mc') {
      const key = regularTestQuestionSelectionKey(item, row, level, format);
      const counts = state.regularTestQuestionCounts;
      const source = regularTestMatrixSourceInput(row, level, format);
      const raw = counts && Object.prototype.hasOwnProperty.call(counts, key)
        ? counts[key] : (source && source.value || 0);
      const count = Math.max(0, parseInt(String(raw || 0), 10) || 0);
      const availableCount = cv7991AvailableCount(item, format, level);
      return Math.min(count, CV7991_MAX_PER_CELL, availableCount == null ? CV7991_MAX_PER_CELL : availableCount);
    }

    function regularTestMatrixSourceInput(row, level, format = 'mc') {
      if (!els.cv7991MatrixTable) return null;
      return els.cv7991MatrixTable.querySelector(`.cv7991-matrix-input[data-row="${row}"][data-format="${format}"][data-level="${level}"]`);
    }

    function normalizeRegularTestQuestionValue(input) {
      if (!input) return 0;
      let value = Math.max(0, parseInt(String(input.value || 0), 10) || 0);
      const max = parseInt(String(input.max || ''), 10);
      if (Number.isFinite(max) && max >= 0) value = Math.min(value, max);
      input.value = String(value);
      return value;
    }

    function syncRegularTestQuestionInput(input) {
      if (!input) return;
      const row = parseInt(String(input.dataset.row || -1), 10);
      const level = String(input.dataset.level || '');
      const format = String(input.dataset.format || 'mc');
      if (row < 0 || !CV7991_LEVELS.includes(level) || !REGULAR_TEST_FORMATS.includes(format)) return;
      const item = cv7991Items()[row];
      if (!item) return;
      const value = normalizeRegularTestQuestionValue(input);
      const selected = value > 0 && !input.disabled;
      input.classList.toggle('regular-question-selected-count', selected);
      const selectedCell = input.closest('td');
      if (selectedCell) selectedCell.classList.toggle('regular-question-selected-cell', selected);

      // Giữ lựa chọn “Dùng câu hỏi của MVIP” riêng để ma trận đề kiểm tra
      // không làm giảm số đã nhập, kể cả khi ngân hàng được nạp lại.
      if (!state.regularTestQuestionCounts) state.regularTestQuestionCounts = Object.create(null);
      state.regularTestQuestionCounts[regularTestQuestionSelectionKey(item, row, level, format)] = value;
      const source = regularTestMatrixSourceInput(row, level, format);
      if (source) {
        source.value = String(value);
        cv7991IntegerValue(source);
      }
    }

    function syncAllRegularTestQuestionInputs() {
      if (!els.regularTestQuestionTable) return;
      els.regularTestQuestionTable.querySelectorAll('.regular-question-input').forEach(syncRegularTestQuestionInput);
      recalcCv7991Matrix();
      updateRegularTestGui();
    }

    function renderRegularTestQuestionEditor() {
      if (!els.regularTestQuestionTable) return;
      if (els.cv7991MatrixTable && !els.cv7991MatrixTable.querySelector('tbody tr')) renderCv7991Matrix();
      const tbody = els.regularTestQuestionTable.querySelector('tbody');
      if (!tbody) return;
      const items = cv7991Items();
      // cv7991Items() đã đưa tất cả bài cùng tên Chủ đề/Chương về cùng một nhóm.
      // Dùng rowspan cho nhóm đó để bảng “Soạn câu hỏi” luôn đủ đúng 11 cột.
      const chapterSpans = cv7991BuildContiguousChapterSpans(items);
      let displayRowNo = 0;
      tbody.innerHTML = items.map((item, idx) => {
        displayRowNo += 1;
        const chapter = String(item && item.chapter || '').trim() || 'Chưa phân chương';
        const chapterMeta = chapterSpans[idx] || { first: idx, count: 1 };
        const chapterCell = (chapterMeta.first === idx)
          ? `<td class="rq-chapter" rowspan="${chapterMeta.count}">${escapeHtml(chapter)}</td>`
          : '';
        const inputCells = REGULAR_TEST_FORMATS.map((format, formatIndex) => CV7991_LEVELS.map((level, levelIndex) => {
          const availableCount = cv7991AvailableCount(item, format, level);
          const disabled = availableCount !== null && availableCount === 0;
          const value = regularTestQuestionCount(item, idx, level, format);
          const maxCount = Math.min(CV7991_MAX_PER_CELL, availableCount == null ? CV7991_MAX_PER_CELL : availableCount);
          const maxAttr = ` max="${maxCount}"`;
          const limitHint = ` — Tối đa ${maxCount} câu/ô, tổng ${REGULAR_TEST_MAX_QUESTIONS} câu/lần.`;
          const formatLabel = cv7991BankFormatLabel(format);
          const title = availableCount == null
            ? `${formatLabel} - ${cv7991LevelLabel(level)}`
            : (availableCount > 0
              ? `Ngân hàng có ${availableCount} câu ${formatLabel} - ${cv7991LevelLabel(level)}`
              : `Ngân hàng không có câu ${formatLabel} - ${cv7991LevelLabel(level)}`);
          const typeStart = formatIndex > 0 && levelIndex === 0 ? ' rq-type-start' : '';
          const selectedClass = !disabled && Number(value || 0) > 0 ? ' regular-question-selected-cell' : '';
          const selectedInputClass = !disabled && Number(value || 0) > 0 ? ' regular-question-selected-count' : '';
          return `<td class="rq-center${typeStart}${disabled ? ' cv7991-cell-disabled' : ''}${selectedClass}"><input class="regular-question-input${selectedInputClass}" data-row="${idx}" data-format="${format}" data-level="${level}" min="0"${maxAttr} step="1" inputmode="numeric" type="number" value="${value}" title="${escapeHtml(title + limitHint)}"${disabled ? ' disabled' : ''}></td>`;
        }).join('')).join('');
        return `<tr data-row="${idx}">
          <td class="rq-center">${displayRowNo}</td>
          ${chapterCell}
          <td class="rq-unit">${escapeHtml(item.unit)}</td>
          ${inputCells}
        </tr>`;
      }).join('');
    }

    function openRegularTestQuestionEditor() {
      const ready = !!((state.cv7991Bank && state.cv7991Bank.fileName) || cv7991ActiveMvipCatalog());
      if (!ready) throw new Error('Phần mềm chưa tải được danh mục ngân hàng đề phù hợp. Bạn bấm lại Dùng câu hỏi của Mvip.');
      if (!els.regularTestQuestionModal) throw new Error('Không tìm thấy giao diện soạn câu hỏi.');
      renderRegularTestQuestionEditor();
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      els.regularTestQuestionModal.hidden = false;
      document.documentElement.classList.add('modal-open');
      const firstInput = els.regularTestQuestionTable && els.regularTestQuestionTable.querySelector('.regular-question-input:not(:disabled)');
      if (firstInput) firstInput.focus({ preventScroll:true });
      else if (els.regularTestQuestionSaveBtn) els.regularTestQuestionSaveBtn.focus({ preventScroll:true });
    }

    function closeRegularTestQuestionEditor() {
      const returnToIntroMvipCheck = document.documentElement.dataset.mvipReturnToIntroCheck === '1';
      delete document.documentElement.dataset.mvipReturnToIntroCheck;
      syncAllRegularTestQuestionInputs();
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      updateRegularTestGui();
      if ((!els.regularTestNoBankModal || els.regularTestNoBankModal.hidden)
        && (!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden)
        && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
      if (returnToIntroMvipCheck) {
        document.dispatchEvent(new CustomEvent('mvip:open-intro-check'));
        return;
      }
      if (els.regularTestStartBtn) els.regularTestStartBtn.focus({ preventScroll:true });
    }

    async function generateRegularTestFromQuestionEditor() {
      syncAllRegularTestQuestionInputs();
      recalcCv7991Matrix();
      updateRegularTestGui();
      await beginRegularTest();
    }

    function resetRegularTestQuestionEditor() {
      if (!els.regularTestQuestionTable) return;
      state.regularTestQuestionCounts = Object.create(null);
      els.regularTestQuestionTable.querySelectorAll('.regular-question-input').forEach((input) => {
        input.value = '0';
        syncRegularTestQuestionInput(input);
      });
      recalcCv7991Matrix();
      updateRegularTestGui();
      const firstInput = els.regularTestQuestionTable.querySelector('.regular-question-input:not(:disabled)');
      if (firstInput) firstInput.focus({ preventScroll:true });
    }

    function updateRegularTestGui() {
      syncRegularTestBankOptions();
      const mon = normMonKey(state.currentMon || '');
      if (els.regularTestClassText) {
        els.regularTestClassText.textContent = mon
          ? `Lớp-Môn đang chọn: ${mon}. Kết quả được lưu vào Kết quả thường xuyên.`
          : 'Chọn Lớp-Môn trước khi bắt đầu.';
      }
      const loaded = state.cv7991Bank;
      const catalog = cv7991ActiveMvipCatalog();
      const ready = !!((loaded && loaded.fileName) || catalog);
      if (loaded && loaded.fileName) {
        setRegularTestTopStatus('', '');
        setRegularTestStatus(els.regularTestBankStatus, `Đã nạp file ${loaded.fileName}: ${Number(loaded.count || 0)} câu/hạng mục.`, 'ok');
      } else if (catalog) {
        setRegularTestTopStatus('', '');
        const parsedCount = loaded && loaded.source === 'mvip' ? Number(loaded.count || 0) : 0;
        const parsedNote = parsedCount ? ` Đã nạp ${parsedCount} câu từ các bài từng được chọn.` : '';
        setRegularTestStatus(els.regularTestBankStatus, `Đã tải danh mục ${catalog.items.length} bài. Câu hỏi chỉ tải khi bấm Sinh đề.${parsedNote}`, 'ok');
      } else {
        setRegularTestStatus(els.regularTestBankStatus, 'Chưa tải danh mục ngân hàng đề.', '');
      }
      const requests = regularTestMcRequests();
      const count = requests.reduce((sum, request) => sum + Math.max(0, Number(request && request.count || 0)), 0);
      const mcCount = requests.filter((request) => request && request.format === 'mc').reduce((sum, request) => sum + Math.max(0, Number(request.count || 0)), 0);
      const tfCount = requests.filter((request) => request && request.format === 'tf').reduce((sum, request) => sum + Math.max(0, Number(request.count || 0)), 0);
      if (els.regularTestMatrixSummary) {
        els.regularTestMatrixSummary.textContent = count
          ? `Đã chọn ${count} câu: ${mcCount} nhiều lựa chọn, ${tfCount} đúng - sai.`
          : 'Chưa chọn câu hỏi.';
      }
      if (els.regularTestQuestionTitle) els.regularTestQuestionTitle.textContent = 'Soạn câu hỏi';
      if (els.regularTestQuestionTotal) els.regularTestQuestionTotal.textContent = `Tổng số câu đã chọn: ${count}/${REGULAR_TEST_MAX_QUESTIONS}`;
      if (els.regularTestOpenMatrixBtn) {
        els.regularTestOpenMatrixBtn.disabled = !mon;
        els.regularTestOpenMatrixBtn.title = ready ? 'Mở bảng soạn câu hỏi ngay; chưa tải nội dung các file Word.' : 'Bấm để xem thông báo ngân hàng câu hỏi của lớp-môn đang chọn.';
      }
      if (els.regularTestBeginBtn) els.regularTestBeginBtn.disabled = !mon || !ready || count < 1;
      if (els.regularTestQuestionSaveBtn) {
        els.regularTestQuestionSaveBtn.disabled = !mon || !ready || count < 1;
        els.regularTestQuestionSaveBtn.title = count > 0 ? 'Sinh đề kiểm tra thường xuyên từ số câu đã chọn.' : 'Chọn số lượng câu hỏi trước khi sinh đề.';
      }
    }

    function updateRegularTestStartButton() {
      if (!els.regularTestStartBtn) return;
      const loggedIn = !!state.token;
      const mon = normMonKey(state.currentMon || '');
      const active = isRegularTestSessionActive();
      const accessBlocked = isGuestAccount() || isLimitedAccount();
      els.regularTestStartBtn.textContent = active ? 'Đang kiểm tra' : 'Dùng câu hỏi của Mvip';
      els.regularTestStartBtn.disabled = accessBlocked ? false : (!loggedIn || !mon || active);
      if (!loggedIn) els.regularTestStartBtn.title = 'Bấm để đăng nhập và dùng câu hỏi của MVIP.';
      else if (isLimitedAccount()) els.regularTestStartBtn.title = 'Bấm để xem hướng dẫn nâng cấp MVIP.';
      else if (!mon) els.regularTestStartBtn.title = 'Chọn Lớp-Môn trước.';
      else if (active) els.regularTestStartBtn.title = 'Đang có một phiên kiểm tra đang chạy.';
      else els.regularTestStartBtn.title = 'Mở thẳng bảng chọn số câu hỏi từ ngân hàng Mvip.';
    }

    async function openRegularTestModal() {
      if (!state.token) throw new Error('Bạn cần đăng nhập trước.');

      // Luồng này luôn dùng ngân hàng MVIP. Việc đặt nguồn ngay từ đầu giúp cả
      // catalog vừa tải từ server lẫn catalog lấy từ IndexedDB được nhận đúng.
      selectCv7991BankSource('mvip');

      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Bạn chọn Lớp-Môn trước khi kiểm tra thường xuyên.');
      if (!sortedStudentKeysFromMap(classDataStudents(mon)).length) throw new Error('Lớp-Môn này chưa có danh sách học sinh.');

      // Bỏ bảng trung gian "Câu hỏi của Mvip": có ngân hàng thì mở thẳng bảng Soạn câu hỏi,
      // chưa có ngân hàng thì mở thẳng bảng thông báo màu đỏ.
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      closeRegularTestNoBankModal();

      const target = selectRegularTestBankForCurrentClass(mon);
      if (!target || !target.url) {
        state.cv7991Bank = null;
        updateRegularTestGui();
        openRegularTestNoBankModal(regularTestNoBankMessage(mon));
        return;
      }
      if (state.cv7991Bank && state.cv7991Bank.source === 'mvip' && String(state.cv7991Bank.url || '') !== target.url) state.cv7991Bank = null;
      if (state.cv7991BankCatalog && String(state.cv7991BankCatalog.url || '') !== target.url) state.cv7991BankCatalog = null;
      setRegularTestTopStatus('', '');
      updateRegularTestGui();
      try {
        await ensureRegularTestBankForCurrentClass(mon);
      } catch (error) {
        const message = error && error.message ? error.message : regularTestNoBankMessage(mon);
        if (String(message).includes('hệ thống chưa có ngân hàng câu hỏi')) {
          state.cv7991Bank = null;
          updateRegularTestGui();
          openRegularTestNoBankModal(message);
          return;
        }
        throw error;
      }
      updateRegularTestGui();
      openRegularTestQuestionEditor();
      resetRegularTestQuestionEditor();
    }

    function closeRegularTestModal() {
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (!state.regularTestMatrixReturn
        && (!els.regularTestQuestionModal || els.regularTestQuestionModal.hidden)
        && (!els.cv7991MatrixModal || els.cv7991MatrixModal.hidden)
        && (!els.cv7991SpecModal || els.cv7991SpecModal.hidden)) {
        document.documentElement.classList.remove('modal-open');
      }
    }

    async function loadRegularTestBank(options = {}) {
      if (!els.cv7991QuestionBankSelect) return null;
      const target = selectRegularTestBankForCurrentClass(state.currentMon || '');
      if (!target || !target.url) return null;
      setRegularTestStatus(els.regularTestBankStatus, `Đang tải danh mục bài: ${target.label}...`, '');
      const loaded = await loadCv7991QuestionBankCatalog(options);
      updateRegularTestGui();
      return loaded;
    }

    function openRegularTestMatrixEditor() {
      const mon = normMonKey(state.currentMon || '');
      const ready = !!((state.cv7991Bank && state.cv7991Bank.fileName) || cv7991ActiveMvipCatalog());
      if (!ready) {
        const target = selectRegularTestBankForCurrentClass(mon);
        if (!target || !target.url) {
          openAlertModal(regularTestNoBankMessage(mon), 'Thông báo');
          return;
        }
        setRegularTestStatus(els.regularTestRunStatus, 'Danh mục bài đang được tải. Thầy/Cô vui lòng chờ trong giây lát rồi bấm lại Soạn câu hỏi.', 'err');
        return;
      }
      openRegularTestQuestionEditor();
    }

    function parseRegularTestLocalQuestionsFromText(text) {
      const sourceLines = String(text || '').replace(/\r/g, '').split('\n').map((line) => String(line || '').trim());
      const blocks = [];
      let current = [];
      let activeFormat = 'mc';
      const qStartRe = /^(?:Câu|Cau)\s*([0-9]+)\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i;
      const pushBlock = () => {
        if (Array.isArray(current) && current.length) blocks.push(current);
        current = [];
      };
      sourceLines.forEach((line) => {
        if (!line) {
          if (Array.isArray(current) && current.length) current.push('');
          return;
        }
        const headingFormat = cv7991DetectQuestionFormatHeading(line);
        if (headingFormat) {
          pushBlock();
          activeFormat = headingFormat;
          return;
        }
        if (cv7991ShouldRemoveBankMetaLine(line)) return;
        if (qStartRe.test(line)) {
          pushBlock();
          current = cv7991ShouldDropQuestionFormat(activeFormat) ? null : [line];
        } else if (Array.isArray(current) && current.length) {
          if (!cv7991ShouldRemoveBankMetaLine(line)) current.push(line);
        }
      });
      pushBlock();
      const questions = [];
      const skipped = [];
      blocks.forEach((block, idx) => {
        const clean = block
          .map((line) => String(line || '').trim())
          .filter((line) => line && !cv7991ShouldRemoveBankMetaLine(line));
        if (!clean.length) return;
        let answer = '';
        for (let i = clean.length - 1; i >= 0; i -= 1) {
          const hint = (typeof cv7991ExtractAnswerHintFromLine === 'function') ? cv7991ExtractAnswerHintFromLine(clean[i]) : '';
          if (hint) {
            answer = hint;
            break;
          }
          const match = clean[i].match(/^Đáp\s*án\s*:\s*([ABCD])\b/i);
          if (match) {
            answer = match[1].toUpperCase();
            break;
          }
        }
        if (!answer) {
          skipped.push(idx + 1);
          return;
        }
        const guideStartIndex = clean.findIndex((line) => !!cv7991GuideStartInfo(line));
        const questionSourceLines = guideStartIndex >= 0 ? clean.slice(0, guideStartIndex) : clean;
        const guideSourceLines = [];
        if (guideStartIndex >= 0) {
          const guideStart = cv7991GuideStartInfo(clean[guideStartIndex]);
          if (guideStart && guideStart.text) guideSourceLines.push(guideStart.text);
          guideSourceLines.push(...clean.slice(guideStartIndex + 1));
        }
        const displayLines = questionSourceLines
          .map((line) => (typeof cv7991StripAnswerHintTokens === 'function') ? cv7991StripAnswerHintTokens(line) : String(line || '').trim())
          .filter((line) => line && !cv7991ShouldRemoveBankMetaLine(line) && !/^Đáp\s*án\s*:/i.test(line));
        const qText = displayLines.join('\n');
        const guide = cv7991CleanGuideLines(guideSourceLines);
        const question = { format: 'mc', text: qText, answer, guide, source: 'local' };
        const parsed = cv7991ParseQuestionForPrint(question, questions.length + 1);
        if (!parsed || !Array.isArray(parsed.options) || parsed.options.length < 4) {
          skipped.push(idx + 1);
          return;
        }
        questions.push(question);
      });
      return { questions, skipped, totalBlocks: blocks.length };
    }

    async function readRegularTestLocalQuestionFile(file, options = {}) {
      if (!file) throw new Error('Bạn chưa chọn file câu hỏi.');
      const name = String(file.name || '').trim() || 'file câu hỏi';
      const lowerName = name.toLowerCase();
      if (/\.txt$|\.text$/i.test(lowerName)) {
        const text = await file.text();
        return { text, images: {}, tables: {}, equations: {}, fileName: name };
      }
      if (!window.JSZip) throw new Error('Chưa tải được thư viện đọc file Word. Bạn kiểm tra Internet rồi thử lại.');
      const buffer = await file.arrayBuffer();
      const zip = await window.JSZip.loadAsync(buffer);
      const docEntry = zip.file('word/document.xml');
      if (!docEntry) throw new Error('File Word không có nội dung document.xml. Bạn nên lưu file ở định dạng .docx rồi tải lại.');
      const xml = await docEntry.async('string');
      const imageMap = await cv7991ExtractDocxImages(zip);
      const wordStyleContext = await cv7991ExtractDocxStyleContext(zip);
      const tableMap = {};
      const equationMap = {};
      const hyperlinkContext = options.preserveHyperlinks ? {
        targets: await cv7991ExtractDocxHyperlinkTargets(zip), links: Object.create(null)
      } : null;
      const rawText = cv7991QuestionTextFromDocXml(xml, imageMap, tableMap, equationMap, wordStyleContext, hyperlinkContext);
      const figureTextResult = cv7991PrepareQuestionBankTextWithFigures(rawText);
      return {
        text: figureTextResult.text || rawText,
        images: imageMap,
        tables: tableMap,
        equations: equationMap,
        fileName: name,
        links: hyperlinkContext ? hyperlinkContext.links : {},
        figureInfo: figureTextResult || {},
      };
    }

    function cv7991CompactLocalPresenterFileName(fileName, maxVisibleChars = 12) {
      const rawName = String(fileName || '').trim().split(/[\\/]/).pop() || '';
      if (!rawName) return '';
      // Tên ngắn vẫn hiển thị đầy đủ. Tên dài chỉ lấy phần đầu dễ nhận biết,
      // bỏ phần mở rộng rồi thêm dấu ba chấm để thanh công cụ không bị chiếm chỗ.
      if (rawName.length <= 24) return rawName;
      const stem = rawName.replace(/\.[^.]+$/, '').trim() || rawName;
      const maxChars = Math.max(6, Number(maxVisibleChars) || 12);
      let prefix = stem.slice(0, maxChars).trim();
      const separators = [prefix.lastIndexOf('_'), prefix.lastIndexOf('-'), prefix.lastIndexOf(' ')];
      const lastSeparator = Math.max(...separators);
      if (lastSeparator >= Math.max(4, Math.floor(maxChars * 0.55))) {
        prefix = prefix.slice(0, lastSeparator).trim();
      }
      prefix = prefix.replace(/[\s_-]+$/g, '').trim();
      if (!prefix) prefix = stem.slice(0, maxChars).trim();
      return `${prefix} ...`;
    }

    async function beginRegularTestFromLocalFile(file) {
      const mon = normMonKey(state.currentMon || '');
      if (!state.token) throw new Error('Bạn cần đăng nhập trước.');
      if (!mon) throw new Error('Bạn chọn Lớp-Môn trước khi kiểm tra.');
      if (!sortedStudentKeysFromMap(classDataStudents(mon)).length) throw new Error('Lớp-Môn này chưa có danh sách học sinh.');
      setRegularTestChoiceStatus(`Đang đọc file: ${file && file.name ? file.name : ''}...`, '');
      const loaded = await readRegularTestLocalQuestionFile(file);
      const parsed = parseRegularTestLocalQuestionsFromText(loaded.text || '');
      if (!parsed.questions.length) {
        throw new Error('File chưa có câu trắc nghiệm hợp lệ. Mỗi câu cần có dạng Câu 1(NB):, Câu 2(TH):, Câu 3(VD): hoặc Câu 4(VDC):; đủ A/B/C/D và đáp án theo một trong các cách: dòng Đáp án: A/B/C/D, bôi đỏ phương án đúng hoặc gạch chân phương án đúng.');
      }
      setRegularTestChoiceStatus(`Đang chuẩn bị trình chiếu ${parsed.questions.length} câu...`, '');
      await cv7991PreparePresenterImages(loaded.images || {}, parsed.questions, loaded.tables || {});
      try { await cv7991WaitForMathJax(); } catch (_) {}
      const slides = cv7991BuildSingleExamSlides(parsed.questions, loaded.images || {}, loaded.tables || {}, loaded.equations || {});
      if (!slides.length) throw new Error('Không tạo được câu hỏi để trình chiếu.');
      const answers = slides.map((slide) => normalizeScanAnswerToken(slide && slide.answer || '') || 'A');
      const fileName = String(loaded.fileName || 'Tải từ máy').trim();
      const shortFileName = cv7991CompactLocalPresenterFileName(fileName);
      state.regularTestSession = {
        active: true,
        slides,
        answers,
        index: 0,
        title: shortFileName ? `Tải từ máy: ${shortFileName}` : 'Tải từ máy',
        fullTitle: fileName ? `Tải từ máy: ${fileName}` : 'Tải từ máy',
        source: 'local',
        uid: `regular-local-${mon}-${Date.now()}`,
        startedAt: new Date().toISOString(),
        savedQuestions: {},
        answerVisible: false,
        activeTfLetter: '',
      };
      if (typeof window.mvipCollapsePresentationInkDock === 'function') {
        window.mvipCollapsePresentationInkDock('singleExamSideInkDock');
      }
      setExamModePreference(mon, false);
      clearCurrentQuestion();
      closeRegularTestChoiceModal();
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      if (els.regularTestNoBankModal) els.regularTestNoBankModal.hidden = true;
      document.documentElement.classList.remove('modal-open');
      renderCurrentBoard();
      renderRegularTestPresenter();
      updateRegularTestStartButton();
      const skipNote = parsed.skipped && parsed.skipped.length ? ` Bỏ qua ${parsed.skipped.length} khối chưa đủ định dạng.` : '';
      showLoginStatus(`Bắt đầu kiểm tra từ file máy: ${slides.length} câu.${skipNote}`, 'ok');
    }

    async function beginRegularTest() {
      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Bạn chọn Lớp-Môn trước khi chấm kiểm tra.');
      if (!sortedStudentKeysFromMap(classDataStudents(mon)).length) throw new Error('Lớp-Môn này chưa có danh sách học sinh.');
      const requests = regularTestMcRequests();
      if (!requests.length) throw new Error('Bạn chọn số lượng câu tại Bước 1. Soạn câu hỏi.');
      const limitMessage = cv7991QuestionLimitMessage(requests, 'Dùng câu hỏi của MVIP', REGULAR_TEST_MAX_QUESTIONS);
      if (limitMessage) throw new Error(limitMessage);
      setRegularTestStatus(els.regularTestRunStatus, 'Đang nạp nội dung các bài đã chọn...', '');
      const loaded = isCv7991MvipBankSelected()
        ? await ensureCv7991QuestionBankForRequests(requests, { reason: 'regular-test' })
        : state.cv7991Bank;
      if (!loaded) throw new Error(regularTestNoBankMessage(mon));

      const seed = `regular-test|${mon}|${Date.now()}|${Math.random()}`;
      const questions = [];
      const missing = [];
      requests.forEach((request) => {
        const picked = pickCv7991Questions(loaded.bank, request, `${request.unitKey}|${request.format}|${request.level}|${seed}`, null);
        if (picked.length < request.count) {
          missing.push(`${request.item.unit} - ${cv7991BankFormatLabel(request.format)} - ${cv7991LevelLabel(request.level)}: thiếu ${request.count - picked.length} câu`);
        }
        picked.forEach((question) => {
          questions.push(Object.assign({}, question, {
            chapter: request.item.chapter,
            unit: request.item.unit,
            format: request.format,
            level: request.level,
          }));
        });
      });
      if (missing.length) throw new Error('Ngân hàng đề chưa đủ số câu đã chọn:\n- ' + missing.join('\n- '));

      setRegularTestStatus(els.regularTestRunStatus, 'Đang sinh câu hỏi và chuẩn bị trình chiếu...', '');
      const shuffled = cv7991ShuffleQuestionsWithinSections(questions, seed, { sortByLevel: true });
      const prepared = cv7991PrepareQuestionsForVersion(shuffled, seed);
      setRegularTestStatus(els.regularTestRunStatus, 'Đang chuyển công thức và hình ảnh từ Word...', '');
      await cv7991PreparePresenterImages(loaded.images || {}, prepared, loaded.tables || {});
      try { await cv7991WaitForMathJax(); } catch (_) {}
      const slides = cv7991BuildSingleExamSlides(prepared, loaded.images || {}, loaded.tables || {}, loaded.equations || {}, { groupTrueFalse: true });
      if (!slides.length) throw new Error('Không tạo được câu trắc nghiệm để trình chiếu.');
      const answers = slides.map((slide) => regularTestWordQuestionFormat(slide) === 'tf' && slide && slide.groupedTrueFalse ? '' : (normalizeScanAnswerToken(slide && slide.answer || '') || 'A'));

      state.regularTestSession = {
        active: true,
        slides,
        answers,
        index: 0,
        title: mon || 'Câu hỏi của Mvip',
        uid: `regular-${mon}-${Date.now()}`,
        startedAt: new Date().toISOString(),
        savedQuestions: {},
        answerVisible: false,
        activeTfLetter: '',
      };
      if (typeof window.mvipCollapsePresentationInkDock === 'function') {
        window.mvipCollapsePresentationInkDock('singleExamSideInkDock');
      }
      setExamModePreference(mon, false);
      clearCurrentQuestion();
      if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = true;
      if (els.regularTestModal) els.regularTestModal.hidden = true;
      if (els.regularTestNoBankModal) els.regularTestNoBankModal.hidden = true;
      document.documentElement.classList.remove('modal-open');
      renderCurrentBoard();
      renderRegularTestPresenter();
      updateRegularTestStartButton();
      showLoginStatus(`Bắt đầu kiểm tra gồm ${slides.length} câu. Học sinh giơ thẻ, giáo viên bấm Kết quả quét rồi Lưu.`, 'ok');
    }

    const singleExamGuideDragState = {
      active: false,
      pointerId: null,
      startX: 0,
      startY: 0,
      originX: 0,
      originY: 0,
      x: 0,
      y: 0,
      minX: 0,
      maxX: 0,
      minY: 0,
      maxY: 0,
    };

    function setSingleExamGuideOffset(x, y) {
      const dialog = els.singleExamGuideDialog;
      if (!dialog) return;
      const nextX = Number.isFinite(Number(x)) ? Number(x) : 0;
      const nextY = Number.isFinite(Number(y)) ? Number(y) : 0;
      singleExamGuideDragState.x = nextX;
      singleExamGuideDragState.y = nextY;
      dialog.style.setProperty('--single-exam-guide-x', `${Math.round(nextX)}px`);
      dialog.style.setProperty('--single-exam-guide-y', `${Math.round(nextY)}px`);
    }

    function singleExamGuideDragBounds() {
      const modal = els.singleExamGuideModal;
      const dialog = els.singleExamGuideDialog;
      const handle = els.singleExamGuideDragHandle;
      if (!modal || !dialog || modal.hidden) return null;

      const modalRect = modal.getBoundingClientRect();
      const dialogRect = dialog.getBoundingClientRect();
      const handleRect = handle ? handle.getBoundingClientRect() : dialogRect;
      const currentX = singleExamGuideDragState.x;
      const currentY = singleExamGuideDragState.y;
      const baseLeft = dialogRect.left - currentX;
      const baseRight = dialogRect.right - currentX;
      const baseTop = dialogRect.top - currentY;
      const visibleWidth = Math.min(180, Math.max(96, dialogRect.width * 0.24));
      const handleHeight = Math.max(48, Math.min(handleRect.height || 58, modalRect.height));

      let minX = modalRect.left + visibleWidth - baseRight;
      // Cho phép đẩy bảng sang trái để lộ câu hỏi, nhưng luôn giữ mép phải (và nút Đóng) trong màn hình.
      let maxX = modalRect.right - 4 - baseRight;
      let minY = modalRect.top + 4 - baseTop;
      let maxY = modalRect.bottom - handleHeight - 4 - baseTop;

      if (minX > maxX) {
        const middleX = (minX + maxX) / 2;
        minX = middleX;
        maxX = middleX;
      }
      if (minY > maxY) {
        const middleY = (minY + maxY) / 2;
        minY = middleY;
        maxY = middleY;
      }
      return { minX, maxX, minY, maxY };
    }

    function clampSingleExamGuidePosition() {
      const bounds = singleExamGuideDragBounds();
      if (!bounds) return;
      const x = Math.min(bounds.maxX, Math.max(bounds.minX, singleExamGuideDragState.x));
      const y = Math.min(bounds.maxY, Math.max(bounds.minY, singleExamGuideDragState.y));
      setSingleExamGuideOffset(x, y);
    }

    function beginSingleExamGuideDrag(event) {
      const modal = els.singleExamGuideModal;
      const dialog = els.singleExamGuideDialog;
      const handle = els.singleExamGuideDragHandle;
      if (!modal || !dialog || !handle || modal.hidden) return;
      if (event.pointerType === 'mouse' && event.button !== 0) return;
      if (event.isPrimary === false) return;
      if (event.target && event.target.closest('button, a, input, select, textarea, label')) return;

      const bounds = singleExamGuideDragBounds();
      if (!bounds) return;
      singleExamGuideDragState.active = true;
      singleExamGuideDragState.pointerId = event.pointerId;
      singleExamGuideDragState.startX = event.clientX;
      singleExamGuideDragState.startY = event.clientY;
      singleExamGuideDragState.originX = singleExamGuideDragState.x;
      singleExamGuideDragState.originY = singleExamGuideDragState.y;
      singleExamGuideDragState.minX = bounds.minX;
      singleExamGuideDragState.maxX = bounds.maxX;
      singleExamGuideDragState.minY = bounds.minY;
      singleExamGuideDragState.maxY = bounds.maxY;
      dialog.classList.add('is-dragging');
      try { handle.setPointerCapture(event.pointerId); } catch (_) {}
      event.preventDefault();
    }

    function moveSingleExamGuideDrag(event) {
      if (!singleExamGuideDragState.active || event.pointerId !== singleExamGuideDragState.pointerId) return;
      const proposedX = singleExamGuideDragState.originX + event.clientX - singleExamGuideDragState.startX;
      const proposedY = singleExamGuideDragState.originY + event.clientY - singleExamGuideDragState.startY;
      const x = Math.min(singleExamGuideDragState.maxX, Math.max(singleExamGuideDragState.minX, proposedX));
      const y = Math.min(singleExamGuideDragState.maxY, Math.max(singleExamGuideDragState.minY, proposedY));
      setSingleExamGuideOffset(x, y);
      event.preventDefault();
    }

    function endSingleExamGuideDrag(event) {
      if (!singleExamGuideDragState.active) return;
      if (event && event.pointerId != null && event.pointerId !== singleExamGuideDragState.pointerId) return;
      const handle = els.singleExamGuideDragHandle;
      const dialog = els.singleExamGuideDialog;
      const pointerId = singleExamGuideDragState.pointerId;
      singleExamGuideDragState.active = false;
      singleExamGuideDragState.pointerId = null;
      if (dialog) dialog.classList.remove('is-dragging');
      if (handle && pointerId != null) {
        try {
          if (handle.hasPointerCapture(pointerId)) handle.releasePointerCapture(pointerId);
        } catch (_) {}
      }
    }

    function resetSingleExamGuidePosition() {
      endSingleExamGuideDrag();
      setSingleExamGuideOffset(0, 0);
    }

    function closeSingleExamGuide() {
      if (els.singleExamGuideModal) els.singleExamGuideModal.hidden = true;
      if (els.singleExamGuideAnswer) {
        els.singleExamGuideAnswer.textContent = '';
        els.singleExamGuideAnswer.hidden = true;
      }
      if (els.singleExamGuideContent) els.singleExamGuideContent.innerHTML = '';
      if (els.singleExamGuideModal) delete els.singleExamGuideModal.dataset.questionIndex;
    }

    async function enterSingleExamFullscreenForGuide() {
      const presenter = els.singleExamPresenter;
      if (!presenter || singleExamIsFullscreen()) return;

      // Mở toàn màn hình từ chính thao tác bấm “Xem hướng dẫn”.
      // Không khởi động đồng hồ đếm ngược ở ô “Số giây”.
      document.body.classList.remove('single-exam-fullscreen-fallback');
      presenter.classList.remove('single-exam-expanded');
      try {
        if (presenter.requestFullscreen) {
          await presenter.requestFullscreen();
        } else if (presenter.webkitRequestFullscreen) {
          const result = presenter.webkitRequestFullscreen();
          if (result && typeof result.then === 'function') await result;
        } else {
          document.body.classList.add('single-exam-fullscreen-fallback');
          presenter.classList.add('single-exam-expanded');
        }
      } catch (_) {
        document.body.classList.add('single-exam-fullscreen-fallback');
        presenter.classList.add('single-exam-expanded');
      }
      updateSingleExamFullscreenButton();
    }

    async function openSingleExamGuide() {
      if (!els.singleExamGuideModal || !els.singleExamGuideContent) return;
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const slides = Array.isArray(session.slides) ? session.slides : [];
      const item = isRegularTestSessionActive() ? (slides[index] || null) : null;
      if (!singleExamSlideHasGuide(item)) {
        closeSingleExamGuide();
        return;
      }
      if (singleExamIsLimitedAccount()) {
        showSingleExamUpgradeRequired();
        return;
      }
      await enterSingleExamFullscreenForGuide();
      const guideHtml = String(item && item.guideHtml || '').trim();
      const guideText = String(item && item.guide || '').trim();
      const correctAnswer = normalizeScanAnswerToken(
        (item && item.answer) || (Array.isArray(session.answers) ? session.answers[index] : '') || ''
      );
      if (els.singleExamGuideAnswer) {
        if (correctAnswer) {
          els.singleExamGuideAnswer.textContent = `Đáp án đúng: ${correctAnswer}`;
          els.singleExamGuideAnswer.hidden = false;
        } else {
          els.singleExamGuideAnswer.textContent = '';
          els.singleExamGuideAnswer.hidden = true;
        }
      }
      if (guideHtml) {
        els.singleExamGuideContent.innerHTML = `<div class="single-exam-guide-text">${guideHtml}</div>`;
      } else if (guideText) {
        els.singleExamGuideContent.innerHTML = `<div class="single-exam-guide-text">${singleExamTextHtml(guideText)}</div>`;
      } else {
        els.singleExamGuideContent.innerHTML = '<div class="single-exam-guide-empty">Không có hướng dẫn</div>';
      }
      els.singleExamGuideModal.dataset.questionIndex = String(index);
      els.singleExamGuideModal.hidden = false;
      // Mỗi lần mở, ưu tiên đặt bảng ở góc dưới bên phải; người dùng vẫn có thể kéo sang vị trí khác.
      resetSingleExamGuidePosition();
      requestAnimationFrame(() => {
        resetSingleExamGuidePosition();
        clampSingleExamGuidePosition();
      });
      if (els.singleExamGuideCloseBtn) els.singleExamGuideCloseBtn.focus({ preventScroll:true });
    }

    function stopRegularTestPresenter(silent = false) {
      if (els.resultModal && !els.resultModal.hidden) closeResultDialog();
      regularTestWordCloseDirectImageZoom();
      closeSingleExamGuide();
      resetSingleExamGuidePosition();
      exitSingleExamFullscreen();
      state.regularTestSession = { active: false, slides: [], answers: [], index: 0, title: 'Kiểm tra ngay', uid: '', savedQuestions: {}, answerVisible: false };
      document.body.classList.remove('single-exam-presenting');
      if (els.singleExamPresenter) els.singleExamPresenter.hidden = true;
      if (els.regularTestPrevBtn) els.regularTestPrevBtn.hidden = true;
      if (els.regularTestNextBtn) els.regularTestNextBtn.hidden = true;
      if (els.regularTestQuestionState) els.regularTestQuestionState.hidden = true;
      state.examPreviewDone = false;
      state.questionFrozen = false;
      resetSingleExamRegionTool();
      regularTestWordClearFitTimers();
      if (els.singleExamSlide) els.singleExamSlide.classList.remove('single-exam-word-live-mode');
      clearCurrentQuestion();
      updateRegularTestStartButton();
      if (!silent) renderCurrentBoard();
    }


    let regularTestWordFitFrame = 0;
    let regularTestWordFitTimers = [];
    let regularTestWordFitSettleTimer = 0;
    let regularTestWordFitRunning = false;
    let regularTestWordFitPending = false;
    let regularTestWordFitDirty = false;
    let regularTestWordFitLastRunAt = 0;
    let regularTestWordFitLastSignature = '';
    let regularTestWordResizeObserver = null;
    let regularTestWordObservedViewport = null;
    let regularTestWordObservedWidth = -1;
    let regularTestWordObservedHeight = -1;
    let regularTestWordRenderToken = 0;

    function regularTestWordClearFitTimers() {
      if (regularTestWordFitFrame) cancelAnimationFrame(regularTestWordFitFrame);
      regularTestWordFitFrame = 0;
      regularTestWordFitTimers.forEach((timer) => clearTimeout(timer));
      regularTestWordFitTimers = [];
      if (regularTestWordFitSettleTimer) clearTimeout(regularTestWordFitSettleTimer);
      regularTestWordFitSettleTimer = 0;
      regularTestWordFitDirty = false;
      regularTestWordFitPending = false;
    }

    function regularTestWordQuestionFormat(item) {
      const type = String(item && item.type || '').trim().toLowerCase();
      if (type === 'true_false') return 'tf';
      if (type === 'short') return 'short';
      return 'mc';
    }

    function regularTestManualSelectionSet(item) {
      const raw = item && item.manualSelectedLetters;
      const values = Array.isArray(raw) ? raw : (raw ? [raw] : []);
      return new Set(values
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
    }

    function regularTestManualTfMarkMap(item) {
      const source = item && item.manualTfMarks && typeof item.manualTfMarks === 'object'
        ? item.manualTfMarks
        : {};
      const output = {};
      Object.entries(source).forEach(([letter, value]) => {
        const key = String(letter || '').trim().toLowerCase();
        const mark = String(value || '').trim().toUpperCase();
        if (key && ['Đ', 'S'].includes(mark)) output[key] = mark;
      });
      return output;
    }

    function regularTestGroupedTfSlide(item = currentRegularTestSlide()) {
      return !!(item && regularTestWordQuestionFormat(item) === 'tf' && item.groupedTrueFalse);
    }

    function regularTestActiveTfLetter(item = currentRegularTestSlide()) {
      if (!regularTestGroupedTfSlide(item)) return '';
      const session = state.regularTestSession || {};
      return String(session.activeTfLetter || '').trim().toLowerCase();
    }

    function regularTestTfLetterIndex(item, letterValue = '') {
      const letter = String(letterValue || '').trim().toLowerCase();
      const options = Array.isArray(item && item.options) ? item.options.slice(0, 4) : [];
      return options.findIndex((option, index) => String(option && option.letter || String.fromCharCode(97 + index)).trim().toLowerCase() === letter);
    }

    function regularTestTfExpectedToken(item, letterValue = '') {
      if (!regularTestGroupedTfSlide(item)) return '';
      const index = regularTestTfLetterIndex(item, letterValue);
      if (index < 0) return '';
      const key = String(item.options[index] && item.options[index].letter || letterValue).trim().toLowerCase();
      const mark = regularTestExpectedTfMark(item, key, index);
      return mark === 'Đ' ? 'D' : (mark === 'S' ? 'A' : '');
    }

    function regularTestTfSavedMap(item) {
      return item && item.scanSavedMarks && typeof item.scanSavedMarks === 'object' ? item.scanSavedMarks : {};
    }

    function regularTestTfClosedMap(item) {
      return item && item.scanClosedItems && typeof item.scanClosedItems === 'object' ? item.scanClosedItems : {};
    }

    function regularTestTfAllFinished(item) {
      if (!regularTestGroupedTfSlide(item)) return false;
      const saved = regularTestTfSavedMap(item);
      const closed = regularTestTfClosedMap(item);
      const options = Array.isArray(item.options) ? item.options.slice(0, 4) : [];
      return options.length > 0 && options.every((option, index) => {
        const key = String(option && option.letter || String.fromCharCode(97 + index)).trim().toLowerCase();
        return !!saved[key] || !!closed[key];
      });
    }

    function regularTestBeginTfScan(letterValue = '') {
      if (!isRegularTestSessionActive()) return false;
      const session = state.regularTestSession || {};
      const item = currentRegularTestSlide();
      if (!regularTestGroupedTfSlide(item)) return false;
      const letter = String(letterValue || '').trim().toLowerCase();
      if (!letter) return false;
      const saved = regularTestTfSavedMap(item);
      const closed = regularTestTfClosedMap(item);
      if (saved[letter] || closed[letter]) return false;
      clearCurrentQuestion();
      closeResultDialog();
      state.examPreviewDone = false;
      state.questionFrozen = false;
      state.revealAnswers = false;
      state.selectedCorrect = '';
      session.answerVisible = false;
      session.activeTfLetter = letter;
      renderCurrentBoard();
      renderRegularTestPresenter();
      showLoginStatus(`Đang nhận kết quả quét cho Câu ${String(item.displayNumber || item.label || session.index + 1)}${letter}.`, 'ok');
      return true;
    }

    function regularTestUpdateTfScanRows() {
      if (!els.singleExamSlide) return;
      const item = currentRegularTestSlide();
      if (!regularTestGroupedTfSlide(item)) return;
      const session = state.regularTestSession || {};
      const active = regularTestActiveTfLetter(item);
      const saved = regularTestTfSavedMap(item);
      const closed = regularTestTfClosedMap(item);
      const answered = answeredStats().answered;
      els.singleExamSlide.querySelectorAll('.word-presentation-item[data-letter]').forEach((row) => {
        const letter = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
        const finished = !!saved[letter] || !!closed[letter];
        row.classList.toggle('is-scan-target', !finished && !!letter && letter === active && !state.examPreviewDone);
        row.classList.toggle('is-scan-finished', finished);
        const button = row.querySelector('[data-regular-tf-scan]');
        if (button) {
          if (finished) {
            button.remove();
            row.classList.remove('has-scan-control');
          } else {
            button.disabled = !!state.examPreviewDone;
            button.textContent = letter === active
              ? (state.examPreviewDone ? 'Đã xem' : `Đang quét${answered ? ` (${answered})` : ''}`)
              : 'Quét';
          }
        }
        const scanMark = String(saved[letter] || '').trim().toUpperCase();
        if (scanMark) regularTestSyncTfChoice(row, scanMark);
      });
    }

    function regularTestCurrentAnswerInfo(item) {
      const format = regularTestWordQuestionFormat(item);
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const rawSessionAnswer = Array.isArray(session.answers) ? session.answers[index] : '';
      const rawItemAnswer = item && (item.answer ?? item.correctAnswer ?? item.correct);
      const token = normalizeScanAnswerToken(rawItemAnswer || rawSessionAnswer || '');
      const correctLetters = new Set((Array.isArray(item && item.correctLetters) ? item.correctLetters : [])
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
      if (token) correctLetters.add(token.toLowerCase());

      let hasAnswer = null;
      if (item && Object.prototype.hasOwnProperty.call(item, 'hasAnswer')) hasAnswer = !!item.hasAnswer;
      else if (item && Object.prototype.hasOwnProperty.call(item, 'hasParsedAnswer')) hasAnswer = !!item.hasParsedAnswer;
      if (hasAnswer == null) {
        hasAnswer = !!token || correctLetters.size > 0 || Array.isArray(item && item.correct)
          || Array.isArray(item && item.tfAnswers) || Array.isArray(item && item.answerItems);
      }

      const rawTfValues = [item && item.tfAnswers, item && item.answerItems, item && item.correct, item && item.answers]
        .find((value) => Array.isArray(value)) || [];
      const tfValues = rawTfValues.map((value) => {
        const raw = value && typeof value === 'object'
          ? (value.state ?? value.value ?? value.correct ?? value.answer ?? '')
          : value;
        if (raw === true || String(raw).trim() === '1') return 'Đ';
        if (raw === false || String(raw).trim() === '0') return 'S';
        return trueFalseCardDisplayValue(raw) || '';
      });
      return { format, hasAnswer: !!hasAnswer, token, correctLetters, tfValues };
    }

    function regularTestManualChoiceClass(item, key) {
      const answerInfo = regularTestCurrentAnswerInfo(item);
      if (!answerInfo.hasAnswer) return 'is-manual-pending';
      return answerInfo.correctLetters.has(String(key || '').toLowerCase())
        ? 'is-manual-correct'
        : 'is-manual-wrong';
    }

    function regularTestExpectedTfMark(item, key, rowIndex = 0) {
      const answerInfo = regularTestCurrentAnswerInfo(item);
      if (!answerInfo.hasAnswer) return '';
      if (answerInfo.tfValues[rowIndex]) return answerInfo.tfValues[rowIndex];
      if (Array.isArray(item && item.correctLetters)
        || (item && Object.prototype.hasOwnProperty.call(item, 'hasParsedAnswer'))) {
        return answerInfo.correctLetters.has(String(key || '').toLowerCase()) ? 'Đ' : 'S';
      }
      const optionLetters = Array.isArray(item && item.options)
        ? item.options.map((option) => String(option && option.letter || '').trim())
        : [];
      const usesUpperChoiceCards = optionLetters.length > 0 && optionLetters.every((letter) => /^[A-D]$/.test(letter));
      if (usesUpperChoiceCards && answerInfo.token) {
        return String(key || '').trim().toUpperCase() === answerInfo.token ? 'Đ' : 'S';
      }
      return trueFalseCardDisplayValue(answerInfo.token) || '';
    }

    function regularTestSetManualTfMark(row, markValue = '') {
      if (!(row instanceof Element)) return;
      row.querySelectorAll('.single-exam-tf-manual-mark').forEach((badge) => badge.remove());
      row.classList.remove('has-manual-mark');
      const mark = String(markValue || '').trim().toUpperCase();
      if (!['Đ', 'S'].includes(mark)) return;
      const badge = document.createElement('span');
      badge.className = `word-presentation-tf-status-mark single-exam-tf-manual-mark ${mark === 'Đ' ? 'is-true' : 'is-false'}`;
      badge.textContent = mark;
      row.appendChild(badge);
      row.classList.add('has-manual-mark');
    }

    function regularTestApplyManualSelectionClasses(item) {
      if (!els.singleExamSlide || !item) return;
      const format = regularTestWordQuestionFormat(item);
      const selected = regularTestManualSelectionSet(item);
      const tfMarks = regularTestManualTfMarkMap(item);
      const rows = Array.from(els.singleExamSlide.querySelectorAll(
        '.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]'
      ));
      rows.forEach((row) => {
        const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
        const active = format === 'mc' && !!key && selected.has(key);
        const tfMark = format === 'tf' ? String(tfMarks[key] || '') : '';
        row.classList.remove('is-manual-selected', 'is-manual-correct', 'is-manual-wrong', 'is-manual-pending', 'has-manual-mark');
        row.querySelectorAll('.single-exam-tf-manual-mark, .word-presentation-tf-manual-mark').forEach((badge) => badge.remove());
        if (active) row.classList.add('is-manual-selected');
        row.setAttribute('aria-pressed', active || !!tfMark ? 'true' : 'false');
        if (format === 'tf') regularTestSyncTfChoice(row, tfMark);
        else regularTestSyncChoiceCheck(row, active);
      });
    }

    function regularTestSetManualTfChoice(row, markValue = '', event = null) {
      if (!(row instanceof Element) || !els.singleExamSlide || !els.singleExamSlide.contains(row)) return false;
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const item = Array.isArray(session.slides) ? session.slides[index] : null;
      if (!item || regularTestWordQuestionFormat(item) !== 'tf') return false;
      const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
      const requested = String(markValue || '').trim().toUpperCase();
      if (!key || !['Đ', 'S'].includes(requested)) return false;
      const marks = regularTestManualTfMarkMap(item);
      if (marks[key] === requested) delete marks[key];
      else marks[key] = requested;
      item.manualTfMarks = marks;
      item.manualSelectedLetters = [];
      regularTestApplyManualSelectionClasses(item);
      if (session.answerVisible) applyRegularTestAnswerHighlight();
      if (els.singleExamSlide.classList.contains('single-exam-word-live-mode')) scheduleRegularTestWordFit(true);
      if (event) {
        event.preventDefault();
        event.stopPropagation();
      }
      return true;
    }

    function regularTestToggleManualSelectionRow(row, event = null, forceOn = false) {
      if (!(row instanceof Element) || !els.singleExamSlide || !els.singleExamSlide.contains(row)) return false;
      const session = state.regularTestSession || {};
      const index = Math.max(0, parseInt(String(session.index || 0), 10) || 0);
      const item = Array.isArray(session.slides) ? session.slides[index] : null;
      if (!item) return false;
      const format = regularTestWordQuestionFormat(item);
      if (!['mc', 'tf'].includes(format)) return false;
      const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
      if (!key) return false;

      if (format === 'tf') return false;
      let selected = regularTestManualSelectionSet(item);
      selected = (!forceOn && selected.size === 1 && selected.has(key))
        ? new Set()
        : new Set([key]);
      item.manualSelectedLetters = Array.from(selected);
      regularTestApplyManualSelectionClasses(item);
      if (els.singleExamSlide.classList.contains('single-exam-word-live-mode')) scheduleRegularTestWordFit(true);
      if (event) {
        event.preventDefault();
        event.stopPropagation();
      }
      return true;
    }

    function regularTestWordSafeRichHtml(value, fallbackText = '') {
      const raw = String(value || '').trim();
      if (raw) return raw;
      return singleExamTextHtml(fallbackText || '');
    }

    function regularTestWordSlideHtml(item, qNo) {
      const displayNumber = escapeHtml(String(item && (item.displayNumber || item.label) || qNo));
      const promptHtml = regularTestWordSafeRichHtml(item && item.promptHtml, item && item.prompt);
      const format = regularTestWordQuestionFormat(item);
      const options = Array.isArray(item && item.options) ? item.options.slice(0, 4) : [];
      const manualSelected = regularTestManualSelectionSet(item);
      const manualTfMarks = regularTestManualTfMarkMap(item);
      const itemsHtml = options.length ? `<div class="word-presentation-items is-stacked${format === 'tf' ? ' is-statements' : ''}">${options.map((opt, index) => {
        const rawLetter = String(opt && opt.letter || String.fromCharCode(65 + index)).trim();
        const letterKey = rawLetter.toLowerCase();
        const letter = escapeHtml(rawLetter);
        const selected = format === 'mc' && manualSelected.has(letterKey);
        const tfMark = format === 'tf' ? String(manualTfMarks[letterKey] || '') : '';
        const optionHtml = typeof singleExamOptionHtmlValue === 'function'
          ? singleExamOptionHtmlValue(opt)
          : regularTestWordSafeRichHtml(opt && opt.html, opt && opt.text);
        const canCheck = format === 'mc' || format === 'tf';
        const savedMarks = regularTestGroupedTfSlide(item) ? regularTestTfSavedMap(item) : {};
        const closedItems = regularTestGroupedTfSlide(item) ? regularTestTfClosedMap(item) : {};
        const finished = format === 'tf' && (!!savedMarks[letterKey] || !!closedItems[letterKey]);
        const scanButton = format === 'tf' && regularTestGroupedTfSlide(item) && !finished
          ? `<button class="word-presentation-tf-scan-btn" data-regular-tf-scan="${escapeHtml(letterKey)}" type="button">Quét</button>`
          : '';
        const choiceHtml = format === 'tf'
          ? cv7991RegularTfChoiceHtml(rawLetter, String(savedMarks[letterKey] || tfMark || ''))
          : (format === 'mc' ? cv7991RegularChoiceCheckHtml(rawLetter, selected) : '');
        const rowClass = `${canCheck ? ' cv7991-has-choice-check' : ''}${format === 'tf' && regularTestGroupedTfSlide(item) && !finished ? ' has-scan-control' : ''}${finished ? ' is-scan-finished' : ''}${selected ? ' is-manual-selected' : ''}`;
        const labelSuffix = format === 'tf' && regularTestGroupedTfSlide(item) ? ')' : '.';
        return `<div class="word-presentation-item${rowClass}" data-letter="${letter}" aria-pressed="${selected || !!tfMark ? 'true' : 'false'}">${scanButton}<span class="word-presentation-item-label">${letter}${labelSuffix}</span><div class="word-presentation-item-content"><div class="word-presentation-item-flow">${optionHtml}</div></div>${choiceHtml}</div>`;
      }).join('')}</div>` : '';
      const plainLength = String(item && item.prompt || '').length
        + options.reduce((sum, opt) => sum + String(opt && opt.text || '').length, 0);
      const densityClass = plainLength > 1750 ? ' is-very-dense' : (plainLength > 950 ? ' is-dense' : '');
      return `<div class="regular-test-word-viewport word-presentation-viewport"><div class="regular-test-word-fit-layer word-presentation-fit-layer"><article class="word-presentation-card regular-test-word-card${densityClass}"><div class="word-presentation-content-shell"><div class="word-presentation-question-line"><span class="word-presentation-question-label">Câu ${displayNumber}:</span><div class="word-presentation-question-prompt">${promptHtml}</div></div>${itemsHtml}<div class="word-presentation-media-panel" hidden></div></div></article></div></div>`;
    }

    function regularTestWordIsFormulaMedia(element) {
      return !!(element instanceof Element && (
        element.classList.contains('single-exam-inline-formula')
        || element.closest('.single-exam-inline-formula')
      ));
    }

    function regularTestWordIsTableMedia(element) {
      return !!(element instanceof Element && (
        element.matches('table, .single-exam-inline-table')
        || element.querySelector('table, .single-exam-inline-table')
      ));
    }

    function regularTestWordOrderMediaByWord(elements) {
      return Array.from(elements || []).filter((element) => element instanceof Element);
    }

    function regularTestWordSourceMediaElements(root) {
      if (!(root instanceof Element)) return [];
      return Array.from(root.querySelectorAll(
        '.single-exam-inline-media:not(.single-exam-inline-formula), '
        + '.single-exam-inline-vector:not(.single-exam-inline-formula), '
        + '.single-exam-inline-table, canvas'
      )).filter((element) => {
        if (!(element instanceof Element)) return false;
        if (regularTestWordIsFormulaMedia(element)) return false;
        return true;
      }).filter((element, index, list) => !list.some((other, otherIndex) =>
        otherIndex < index && other.contains(element)
      ));
    }

    function regularTestWordScaleSourceMediaWithText(elements) {
      const fallbackSourceFontPx = 16;
      Array.from(elements || []).forEach((element) => {
        if (!(element instanceof HTMLElement)) return;
        if (regularTestWordIsTableMedia(element)) return;
        const wordCharacterPt = parseFloat(element.style.getPropertyValue('--cv-word-character-height-pt')) || 0;
        const sourceFontPx = element.classList.contains('cv7991-word-small-flow-image') && wordCharacterPt > 0
          ? wordCharacterPt * 96 / 72
          : fallbackSourceFontPx;
        let baseWidth = Number(element.dataset.cv7991WordBaseWidthPx) || 0;
        let baseHeight = Number(element.dataset.cv7991WordBaseHeightPx) || 0;
        if (!(baseWidth > 0)) {
          baseWidth = parseFloat(element.style.getPropertyValue('--cv-presenter-base-width'))
            || parseFloat(element.style.width) || 0;
          if (baseWidth > 0) element.dataset.cv7991WordBaseWidthPx = String(baseWidth);
        }
        if (!(baseHeight > 0)) {
          baseHeight = parseFloat(element.style.getPropertyValue('--cv-presenter-base-height'))
            || parseFloat(element.style.height) || 0;
          if (baseHeight > 0) element.dataset.cv7991WordBaseHeightPx = String(baseHeight);
        }
        if (baseWidth > 0) element.style.width = `${Math.round(baseWidth / sourceFontPx * 100000) / 100000}em`;
        if (baseHeight > 0) element.style.height = `${Math.round(baseHeight / sourceFontPx * 100000) / 100000}em`;
      });
    }

    function regularTestWordTableContainsFigure(element) {
      if (!(element instanceof Element)) return false;
      return Array.from(element.querySelectorAll(
        'img, canvas, svg, .single-exam-inline-vector, .single-exam-inline-media'
      )).some((visual) => visual instanceof Element && !visual.closest('.single-exam-inline-formula'));
    }

    function regularTestWordKeepHorizontalTableAtSource(element) {
      if (!(element instanceof Element) || !regularTestWordIsTableMedia(element)) return false;
      if (regularTestWordTableContainsFigure(element)) return false;
      const table = element.matches('table, .single-exam-inline-table')
        ? element : element.querySelector('table, .single-exam-inline-table');
      if (!(table instanceof Element)) return false;
      const size = regularTestWordTableVisualSize(table);
      const rows = Math.max(0, Number(table.rows && table.rows.length) || table.querySelectorAll('tr').length || 0);
      const columns = Array.from(table.querySelectorAll('tr')).reduce((max, row) => {
        const count = Array.from(row.children || []).reduce((sum, cell) => {
          return sum + Math.max(1, parseInt(String(cell && cell.getAttribute && cell.getAttribute('colspan') || '1'), 10) || 1);
        }, 0);
        return Math.max(max, count);
      }, 0);
      const horizontal = size.width > 0 && size.height > 0
        ? size.width > size.height * 1.05
        : columns > rows;
      if (!horizontal) return false;
      table.classList.add('cv7991-source-horizontal-table');
      if (element !== table) element.classList.add('cv7991-source-horizontal-table-host');
      return true;
    }

    function regularTestWordMediaCandidates(questionLine) {
      if (!(questionLine instanceof Element)) return [];
      const candidates = regularTestWordSourceMediaElements(questionLine).filter((element) => {
        /* DrawingML/nhóm hình của Word cũng là hình minh họa của câu hỏi.
           Giữ khung vector ngoài để đưa sang vùng hình; chỉ bỏ SVG con để
           không nhân đôi cùng một hình. */
        if (element.tagName === 'SVG' && element.closest('.single-exam-inline-vector')) return false;
        /* Ảnh nhỏ giữ nguyên tại token; chỉ ảnh lớn mới là ứng viên của panel. */
        if (element.classList.contains('cv7991-word-small-flow-image')) return false;
        return true;
      }).filter((element, index, list) => !list.some((other, otherIndex) => otherIndex < index && other.contains(element)));
      const hasMultipleWordMedia = candidates.length >= 2;
      return candidates.filter((element) => {
        /* Bảng ngang đứng một mình vẫn ở vị trí cũ. Nếu câu có từ 2 đối tượng,
           đưa cả bảng vào panel để thứ tự giữa bảng và ảnh/biểu đồ không bị đảo. */
        if (!hasMultipleWordMedia && regularTestWordIsTableMedia(element)
          && regularTestWordKeepHorizontalTableAtSource(element)) return false;
        return true;
      });
    }

    function regularTestWordCleanPrompt(prompt) {
      if (!(prompt instanceof Element)) return;
      Array.from(prompt.querySelectorAll('.single-exam-rich, span, div, p')).reverse().forEach((element) => {
        if (!(element instanceof Element)) return;
        const hasVisual = !!element.querySelector('img,svg,canvas,table,math,.single-exam-inline-vector,.single-exam-inline-formula');
        const textValue = String(element.textContent || '').replace(/\u00a0/g, ' ').trim();
        // Sau khi ảnh/bảng được chuyển sang vùng phương tiện, vỏ cũ có thể chỉ còn
        // một hoặc nhiều thẻ <br>. Vỏ như vậy không mang nội dung và phải xóa.
        if (!hasVisual && !textValue) {
          try { element.remove(); } catch (_) {}
        }
      });
      const blankText = (node) => node && node.nodeType === Node.TEXT_NODE
        && !String(node.nodeValue || '').replace(/\u00a0/g, ' ').trim();
      // Gộp hai thẻ xuống dòng liên tiếp còn lại sau khi lấy ảnh neo ra khỏi đề.
      Array.from(prompt.querySelectorAll('br')).forEach((br) => {
        let previous = br.previousSibling;
        while (blankText(previous)) {
          const current = previous;
          previous = previous.previousSibling;
          try { current.remove(); } catch (_) {}
        }
        if (previous && previous.nodeType === Node.ELEMENT_NODE && previous.tagName === 'BR') {
          try { br.remove(); } catch (_) {}
        }
      });
      while (prompt.firstChild && (blankText(prompt.firstChild)
        || (prompt.firstChild.nodeType === Node.ELEMENT_NODE && prompt.firstChild.tagName === 'BR'))) {
        prompt.removeChild(prompt.firstChild);
      }
      while (prompt.lastChild && (blankText(prompt.lastChild)
        || (prompt.lastChild.nodeType === Node.ELEMENT_NODE && prompt.lastChild.tagName === 'BR'))) {
        prompt.removeChild(prompt.lastChild);
      }
    }

    function regularTestWordTableVisualSize(element) {
      if (!(element instanceof Element)) return { width:0, height:0, area:0 };
      const table = element.matches('table') ? element : element.querySelector('table');
      const visual = element.getBoundingClientRect ? element : table;
      const rect = visual && visual.getBoundingClientRect ? visual.getBoundingClientRect() : null;
      let width = Number(rect && rect.width) || Number(visual && (visual.scrollWidth || visual.offsetWidth || visual.clientWidth)) || 0;
      let height = Number(rect && rect.height) || Number(visual && (visual.scrollHeight || visual.offsetHeight || visual.clientHeight)) || 0;
      if (table) {
        width = Math.max(width, Number(table.scrollWidth || table.offsetWidth || table.clientWidth) || 0);
        height = Math.max(height, Number(table.scrollHeight || table.offsetHeight || table.clientHeight) || 0);
      }
      return { width, height, area:Math.max(0, width) * Math.max(0, height) };
    }


    function regularTestWordImageZoomApi() {
      const api = window.mvipWordPresentationDisplay || null;
      return api && typeof api.prepareImageZoom === 'function' ? api : null;
    }

    function regularTestWordPrepareDirectImageZoom(root) {
      const api = regularTestWordImageZoomApi();
      if (!api || !(root instanceof Element)) return;
      try { api.prepareImageZoom(root); } catch (_) {}
    }

    function regularTestWordCloseDirectImageZoom() {
      const api = regularTestWordImageZoomApi();
      if (!api || typeof api.closeImageZoom !== 'function') return;
      try { api.closeImageZoom(); } catch (_) {}
    }

    function regularTestWordHandleDirectImageZoom(event) {
      if (!els.singleExamPresenter || els.singleExamPresenter.hidden || !els.singleExamSlide) return false;
      const api = regularTestWordImageZoomApi();
      if (!api || typeof api.sourceFromTarget !== 'function' || typeof api.openImageZoom !== 'function') return false;
      let source = null;
      try { source = api.sourceFromTarget(event && event.target, els.singleExamSlide); } catch (_) {}
      if (!(source instanceof Element)) return false;
      if (event) {
        event.preventDefault();
        event.stopPropagation();
      }
      resetSingleExamRegionTool();
      closeSingleExamGuide();
      // Modal phải là con của presenter MVIP để vẫn nhìn thấy khi presenter
      // chính là phần tử đang ở chế độ Fullscreen API.
      try { api.openImageZoom(source, els.singleExamPresenter); } catch (_) { return false; }
      return true;
    }

    function regularTestWordFigureMetrics(element) {
      if (!(element instanceof Element)) return { width:1, height:1, ratio:1, area:1 };
      let width = 0;
      let height = 0;
      if (element instanceof HTMLImageElement) {
        width = Number(element.naturalWidth) || 0;
        height = Number(element.naturalHeight) || 0;
      } else if (element instanceof HTMLCanvasElement) {
        width = Number(element.width) || 0;
        height = Number(element.height) || 0;
      }
      const svg = element.matches && element.matches('svg')
        ? element
        : (element.querySelector ? element.querySelector('svg') : null);
      if (!(width > 0 && height > 0) && svg) {
        const values = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (values.length >= 4 && values[2] > 0 && values[3] > 0) {
          width = values[2];
          height = values[3];
        }
      }
      if (!(width > 0 && height > 0)) {
        let ratio = 0;
        ['--cv-word-display-ratio', '--cv-presenter-ratio', '--cv-source-ratio'].some((name) => {
          try { ratio = parseFloat(element.style.getPropertyValue(name)) || 0; } catch (_) { ratio = 0; }
          return ratio > 0.02;
        });
        const rect = element.getBoundingClientRect();
        width = Number(rect && rect.width) || Number(element.clientWidth) || Number(element.scrollWidth) || 1;
        height = Number(rect && rect.height) || Number(element.clientHeight) || Number(element.scrollHeight) || 1;
        if (ratio > 0.02 && !(width > 1 && height > 1)) {
          width = ratio;
          height = 1;
        }
      }
      width = Math.max(1, width);
      height = Math.max(1, height);
      return { width, height, ratio:Math.max(0.02, width / height), area:width * height };
    }

    function regularTestWordPrimaryFigureMetrics(panel) {
      if (!(panel instanceof Element)) return { width:1, height:1, ratio:1, area:1 };
      const figures = Array.from(panel.children).filter((element) =>
        element instanceof Element && !regularTestWordIsTableMedia(element));
      return figures.map(regularTestWordFigureMetrics)
        .reduce((best, current) => current.area > best.area ? current : best,
          { width:1, height:1, ratio:1, area:1 });
    }

    function cv7991ResetBottomRightMediaOptionFlow(card) {
      if (!(card instanceof HTMLElement)) return;
      card.classList.remove('cv7991-bottom-right-media-flow', 'cv7991-bottom-right-prompt-flow');
      Array.from(card.querySelectorAll('.cv7991-media-prompt-shape')).forEach((shape) => {
        try { shape.remove(); } catch (_) {}
      });
      const shell = card.querySelector('.word-presentation-content-shell');
      const panel = card.querySelector('.word-presentation-media-panel');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const items = card.querySelector('.word-presentation-items');
      if (shell instanceof HTMLElement) {
        ['display', 'position', 'height', 'min-height', 'max-height', 'overflow'].forEach((name) => shell.style.removeProperty(name));
      }
      if (panel instanceof HTMLElement) {
        ['position', 'left', 'top', 'right', 'bottom', 'z-index', 'width', 'height',
          'min-width', 'min-height', 'max-width', 'max-height', 'align-items',
          'justify-content', 'align-self', 'justify-self'].forEach((name) => panel.style.removeProperty(name));
      }
      if (questionLine instanceof HTMLElement) {
        ['position', 'z-index', 'display', 'width', 'max-width', 'min-width', 'height',
          'min-height', 'overflow', 'grid-column', 'grid-row', 'align-self'].forEach((name) => questionLine.style.removeProperty(name));
        delete questionLine.dataset.mediaFlowWidth;
      }
      if (items instanceof HTMLElement) {
        ['position', 'z-index', 'display', 'grid-template-columns', 'grid-auto-flow',
          'width', 'max-width', 'min-width', 'grid-column', 'grid-row', 'align-self',
          'justify-self', 'column-gap', 'row-gap'].forEach((name) => items.style.removeProperty(name));
        Array.from(items.children).forEach((row) => {
          if (!(row instanceof HTMLElement)) return;
          ['width', 'max-width', 'min-width', 'justify-self'].forEach((name) => row.style.removeProperty(name));
          delete row.dataset.mediaFlowWidth;
        });
      }
    }

    function cv7991BottomRightVisibleMediaRect(panel) {
      if (!(panel instanceof HTMLElement)) return null;
      const panelRect = panel.getBoundingClientRect();
      if (!(panelRect.width > 0 && panelRect.height > 0)) return null;

      // Nhiều hình/bảng trong cùng panel được coi như sử dụng toàn panel để
      // tránh bất kỳ trường hợp chồng lấn nào.
      const elementChildren = Array.from(panel.children).filter((child) => child instanceof Element);
      if (panel.classList.contains('is-multiple-media') || elementChildren.length > 1) {
        return {
          left: panelRect.left,
          top: panelRect.top,
          right: panelRect.right,
          bottom: panelRect.bottom,
          width: panelRect.width,
          height: panelRect.height,
        };
      }

      let ratio = 1;
      try {
        const metrics = regularTestWordPrimaryFigureMetrics(panel);
        ratio = Number(metrics && metrics.ratio) || 1;
      } catch (_) {}
      ratio = Math.max(0.02, Math.min(50, ratio));

      // object-fit:contain + object-position:right bottom. Tính đúng phần ảnh
      // thực sự nhìn thấy thay vì dùng cả khung panel còn nhiều khoảng trắng.
      let visibleWidth = panelRect.width;
      let visibleHeight = visibleWidth / ratio;
      if (visibleHeight > panelRect.height) {
        visibleHeight = panelRect.height;
        visibleWidth = visibleHeight * ratio;
      }
      visibleWidth = Math.max(1, Math.min(panelRect.width, visibleWidth));
      visibleHeight = Math.max(1, Math.min(panelRect.height, visibleHeight));
      return {
        left: panelRect.right - visibleWidth,
        top: panelRect.bottom - visibleHeight,
        right: panelRect.right,
        bottom: panelRect.bottom,
        width: visibleWidth,
        height: visibleHeight,
      };
    }

    function cv7991ApplyBottomRightMediaOptionFlow(card, requestedPanelWidth = 0, requestedPanelHeight = 0, requestedGap = 12) {
      if (card instanceof Element && card.classList.contains('cv7991-source-question-layout')) return;
      if (!(card instanceof HTMLElement)) return;
      if (card.classList.contains('cv7991-multiple-question-media')) {
        cv7991LayoutMultipleQuestionMedia(card);
        return;
      }
      if (!(card.classList.contains('media-layout-figure') || card.classList.contains('media-layout-mixed'))) return;
      const shell = card.querySelector('.word-presentation-content-shell');
      const panel = card.querySelector('.word-presentation-media-panel');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const items = card.querySelector('.word-presentation-items');
      if (!(shell instanceof HTMLElement) || !(panel instanceof HTMLElement) || panel.hidden) return;

      Array.from(card.querySelectorAll('.cv7991-media-prompt-shape')).forEach((shape) => {
        try { shape.remove(); } catch (_) {}
      });
      card.classList.add('cv7991-bottom-right-media-flow');
      card.classList.toggle('cv7991-bottom-right-prompt-flow', !(items instanceof HTMLElement));

      const scrollViewport = card.closest(
        '.word-presentation-viewport.cv7991-vertical-scroll, '
        + '.regular-test-word-viewport.cv7991-vertical-scroll'
      );
      const verticalScrollMode = scrollViewport instanceof HTMLElement;
      const flowVisualScale = verticalScrollMode
        ? Math.max(0.01, Math.min(1, parseFloat(card.dataset.cv7991ViewportScale) || 1))
        : 1;
      const scrollShellMinHeight = Math.max(0,
        parseFloat(card.style.getPropertyValue('--cv7991-scroll-shell-min-height')) || 0
      );

      shell.style.setProperty('display', 'block', 'important');
      shell.style.setProperty('position', 'relative', 'important');
      if (verticalScrollMode) {
        shell.style.setProperty('height', 'auto', 'important');
        shell.style.setProperty('min-height', `${Math.round(scrollShellMinHeight * 100) / 100}px`, 'important');
        shell.style.setProperty('max-height', 'none', 'important');
      } else {
        shell.style.setProperty('height', '100%', 'important');
        shell.style.setProperty('min-height', '0', 'important');
        shell.style.removeProperty('max-height');
      }
      shell.style.setProperty('overflow', 'visible', 'important');
      void shell.offsetHeight;

      const shellWidth = Math.max(1, Number(shell.clientWidth || card.clientWidth) || 1);
      const shellHeight = verticalScrollMode
        ? Math.max(1, scrollShellMinHeight, Number(shell.clientHeight) || 0, Number(shell.scrollHeight) || 0)
        : Math.max(1, Number(shell.clientHeight || card.clientHeight) || 1);
      const firstViewFlowHeight = verticalScrollMode
        ? Math.max(1, scrollShellMinHeight || Number(card.clientHeight) || shellHeight)
        : shellHeight;
      let panelWidth = Number(requestedPanelWidth) || parseFloat(panel.style.width) || parseFloat(getComputedStyle(panel).width) || 0;
      let panelHeight = Number(requestedPanelHeight) || parseFloat(panel.style.height) || parseFloat(getComputedStyle(panel).height) || 0;
      panelWidth = Math.max(1, Math.min(shellWidth, panelWidth || shellWidth * 0.5));
      panelHeight = Math.max(1, Math.min(firstViewFlowHeight, panelHeight || firstViewFlowHeight * (2 / 3)));
      const gap = Math.max(6, Math.min(28, Number(requestedGap) || 12));
      const visualGap = gap * flowVisualScale;
      const roundedPanelWidth = Math.round(panelWidth * 100) / 100;
      const roundedPanelHeight = Math.round(panelHeight * 100) / 100;

      panel.style.setProperty('position', 'absolute', 'important');
      panel.style.setProperty('left', 'auto', 'important');
      panel.style.setProperty('right', '0px', 'important');
      if (verticalScrollMode) {
        panel.style.setProperty('top', `${Math.max(0, Math.round((firstViewFlowHeight - panelHeight) * 100) / 100)}px`, 'important');
        panel.style.setProperty('bottom', 'auto', 'important');
      } else {
        panel.style.setProperty('top', 'auto', 'important');
        panel.style.setProperty('bottom', '0px', 'important');
      }
      panel.style.setProperty('z-index', '1', 'important');
      panel.style.setProperty('width', `${roundedPanelWidth}px`, 'important');
      panel.style.setProperty('height', `${roundedPanelHeight}px`, 'important');
      panel.style.setProperty('min-width', '0px', 'important');
      panel.style.setProperty('min-height', '0px', 'important');
      panel.style.setProperty('max-width', `${roundedPanelWidth}px`, 'important');
      panel.style.setProperty('max-height', `${roundedPanelHeight}px`, 'important');
      panel.style.setProperty('align-items', 'flex-end', 'important');
      panel.style.setProperty('justify-content', 'flex-end', 'important');

      Array.from(panel.querySelectorAll('svg')).forEach((svg) => {
        try { svg.setAttribute('preserveAspectRatio', 'xMaxYMax meet'); } catch (_) {}
      });

      if (questionLine instanceof HTMLElement) {
        questionLine.style.setProperty('position', 'relative', 'important');
        questionLine.style.setProperty('z-index', '2', 'important');
        questionLine.style.setProperty('display', 'block', 'important');
        questionLine.style.setProperty('width', '100%', 'important');
        questionLine.style.setProperty('max-width', '100%', 'important');
        questionLine.style.setProperty('min-width', '0px', 'important');
        questionLine.style.setProperty('overflow', 'visible', 'important');
        questionLine.style.setProperty('grid-column', 'auto', 'important');
        questionLine.style.setProperty('grid-row', 'auto', 'important');
        questionLine.dataset.mediaFlowWidth = 'full';
      }

      /* Câu tự luận/trả lời ngắn không có khối phương án riêng:
         đặt một float trong suốt có shape-outside chỉ ở phần dưới bên phải.
         Nhờ vậy các dòng ở phía trên hình vẫn dùng toàn bộ chiều rộng; chỉ những
         dòng đi vào đúng độ cao của hình mới tự né sang cột trái, không chồng lấn. */
      if (!(items instanceof HTMLElement)) {
        if (!(questionLine instanceof HTMLElement)) return;
        const flowShapeHeight = verticalScrollMode ? firstViewFlowHeight : shellHeight;
        const topInset = Math.max(0, flowShapeHeight - panelHeight);
        const shape = document.createElement('span');
        shape.className = 'cv7991-media-prompt-shape';
        shape.setAttribute('aria-hidden', 'true');
        shape.setAttribute('role', 'presentation');
        shape.style.setProperty('display', 'block', 'important');
        shape.style.setProperty('float', 'right', 'important');
        shape.style.setProperty('width', `${roundedPanelWidth}px`, 'important');
        shape.style.setProperty('height', `${Math.round(flowShapeHeight * 100) / 100}px`, 'important');
        shape.style.setProperty('margin', '0px', 'important');
        shape.style.setProperty('padding', '0px', 'important');
        shape.style.setProperty('border', '0px', 'important');
        shape.style.setProperty('font-size', '0px', 'important');
        shape.style.setProperty('line-height', '0', 'important');
        shape.style.setProperty('opacity', '0', 'important');
        shape.style.setProperty('pointer-events', 'none', 'important');
        shape.style.setProperty('user-select', 'none', 'important');
        shape.style.setProperty('shape-outside', `inset(${Math.round(topInset * 100) / 100}px 0px 0px 0px)`, 'important');
        shape.style.setProperty('-webkit-shape-outside', `inset(${Math.round(topInset * 100) / 100}px 0px 0px 0px)`, 'important');
        shape.style.setProperty('shape-margin', `${gap}px`, 'important');
        shape.style.setProperty('shape-image-threshold', '0', 'important');
        questionLine.insertBefore(shape, questionLine.firstChild);
        questionLine.dataset.mediaFlowWidth = 'shape';
        void shell.offsetHeight;
        return;
      }

      items.dataset.mvipOptionColumns = '1';
      items.classList.remove('is-grid', 'is-four-columns');
      items.classList.add('is-stacked');
      items.style.setProperty('position', 'relative', 'important');
      items.style.setProperty('z-index', '2', 'important');
      items.style.setProperty('display', 'grid', 'important');
      items.style.setProperty('grid-template-columns', 'minmax(0, 1fr)', 'important');
      items.style.setProperty('grid-auto-flow', 'row', 'important');
      items.style.setProperty('grid-column', 'auto', 'important');
      items.style.setProperty('grid-row', 'auto', 'important');
      items.style.setProperty('width', '100%', 'important');
      items.style.setProperty('max-width', '100%', 'important');
      items.style.setProperty('min-width', '0px', 'important');
      items.style.setProperty('align-self', 'auto', 'important');
      items.style.setProperty('justify-self', 'auto', 'important');
      items.style.setProperty('column-gap', '0px', 'important');
      items.style.setProperty('row-gap', '8px', 'important');

      const rows = Array.from(items.children).filter((row) => row instanceof HTMLElement);
      rows.forEach((row) => {
        row.style.setProperty('width', '100%', 'important');
        row.style.setProperty('max-width', '100%', 'important');
        row.style.setProperty('min-width', '0px', 'important');
        row.style.setProperty('justify-self', 'stretch', 'important');
        row.dataset.mediaFlowWidth = 'full';
      });

      // Buộc trình duyệt dựng bố cục toàn chiều rộng trước. Nhờ vậy phương án B
      // trong ví dụ Câu 68 được đo ở trạng thái ngắn nhất và có thể nằm trọn phía
      // trên ảnh, thay vì bị thu hẹp trước rồi tự xuống dòng quá sớm.
      void shell.offsetHeight;

      let visibleRect = cv7991BottomRightVisibleMediaRect(panel);
      let shellRect = shell.getBoundingClientRect();
      if (!visibleRect || !(shellRect.width > 0)) return;

      // Nếu đề bài thật sự kéo xuống vùng ảnh thì mới thu toàn khối đề về bên
      // trái; còn khi nằm trên ảnh, đề vẫn dùng hết chiều rộng.
      if (questionLine instanceof HTMLElement) {
        const questionRect = questionLine.getBoundingClientRect();
        if (questionRect.bottom > visibleRect.top - visualGap
          && questionRect.top < visibleRect.bottom + visualGap) {
          const visualQuestionWidth = Math.max(120 * flowVisualScale,
            Math.min(shellRect.width, visibleRect.left - shellRect.left - visualGap));
          const questionWidth = Math.max(120, visualQuestionWidth / flowVisualScale);
          questionLine.style.setProperty('width', `${Math.floor(questionWidth)}px`, 'important');
          questionLine.style.setProperty('max-width', `${Math.floor(questionWidth)}px`, 'important');
          questionLine.dataset.mediaFlowWidth = 'left';
          void shell.offsetHeight;
          visibleRect = cv7991BottomRightVisibleMediaRect(panel) || visibleRect;
          shellRect = shell.getBoundingClientRect();
        }
      }

      // Thu hẹp theo kiểu một chiều: bắt đầu bằng toàn chiều rộng, sau đó chỉ
      // những hàng giao với phần ảnh nhìn thấy mới chuyển sang cột trái. Lặp lại
      // để bắt các hàng bị đẩy xuống sau khi hàng trước tăng chiều cao.
      for (let pass = 0; pass < 6; pass += 1) {
        let changed = false;
        visibleRect = cv7991BottomRightVisibleMediaRect(panel) || visibleRect;
        shellRect = shell.getBoundingClientRect();
        const visualLeftWidth = Math.max(120 * flowVisualScale,
          Math.min(shellRect.width, visibleRect.left - shellRect.left - visualGap));
        const leftWidth = Math.max(120, visualLeftWidth / flowVisualScale);
        rows.forEach((row) => {
          if (row.dataset.mediaFlowWidth === 'left') return;
          const rowRect = row.getBoundingClientRect();
          const overlapsVertically = rowRect.bottom > visibleRect.top - visualGap
            && rowRect.top < visibleRect.bottom + visualGap;
          if (!overlapsVertically) return;
          row.style.setProperty('width', `${Math.floor(leftWidth)}px`, 'important');
          row.style.setProperty('max-width', `${Math.floor(leftWidth)}px`, 'important');
          row.style.setProperty('justify-self', 'start', 'important');
          row.dataset.mediaFlowWidth = 'left';
          changed = true;
        });
        if (!changed) break;
        void shell.offsetHeight;
      }
    }

    function regularTestWordSetAdaptiveOptionColumns(card, leftWidth) {
      if (!(card instanceof Element)) return 1;
      const items = card.querySelector('.word-presentation-items');
      if (!(items instanceof HTMLElement)) return 1;
      const columns = 1;
      items.dataset.mvipOptionColumns = '1';
      items.classList.remove('is-four-columns', 'is-grid');
      items.classList.add('is-stacked');
      items.style.setProperty('grid-template-columns', 'minmax(0, 1fr)', 'important');
      items.style.setProperty('column-gap', '0px', 'important');
      items.style.setProperty('row-gap', '8px', 'important');
      items.style.setProperty('width', '100%', 'important');
      items.style.setProperty('max-width', '100%', 'important');
      return columns;
    }

    function regularTestWordResetMvipFigureLayout(card) {
      if (!(card instanceof Element)) return;
      if (card instanceof HTMLElement) cv7991ResetBottomRightMediaOptionFlow(card);
      card.classList.remove('mvip-figure-width-target', 'mvip-figure-height-target');
      delete card.dataset.mvipFigureTarget;
      ['--mvip-figure-panel-width', '--mvip-figure-panel-height',
        '--wp-media-target-width', '--wp-media-target-height'].forEach((name) => card.style.removeProperty(name));
      const shell = card.querySelector('.word-presentation-content-shell');
      const panel = card.querySelector('.word-presentation-media-panel');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const items = card.querySelector('.word-presentation-items');
      if (shell instanceof HTMLElement) {
        ['grid-template-columns', 'grid-template-rows', 'column-gap', 'row-gap'].forEach((name) => shell.style.removeProperty(name));
      }
      if (panel instanceof HTMLElement) {
        ['width', 'height', 'min-width', 'min-height', 'max-width', 'max-height',
          'grid-column', 'grid-row', 'align-self', 'justify-self'].forEach((name) => panel.style.removeProperty(name));
      }
      if (questionLine instanceof HTMLElement) {
        ['grid-column', 'grid-row', 'align-self'].forEach((name) => questionLine.style.removeProperty(name));
      }
      if (items instanceof HTMLElement) {
        delete items.dataset.mvipOptionColumns;
        ['grid-column', 'grid-row', 'width', 'max-width', 'align-self', 'justify-self',
          'grid-template-columns', 'column-gap', 'row-gap'].forEach((name) => items.style.removeProperty(name));
      }
    }

    function cv7991PresentationMediaAspectRatio(element) {
      if (!(element instanceof Element)) return 1;
      try {
        if (typeof regularTestWordFigureMetrics === 'function') {
          const metrics = regularTestWordFigureMetrics(element);
          const ratio = Number(metrics && metrics.ratio) || 0;
          if (ratio > 0.03 && ratio < 50) return ratio;
        }
      } catch (_) {}
      const img = element instanceof HTMLImageElement ? element : element.querySelector('img');
      if (img) {
        const width = Number(img.naturalWidth || img.width || img.clientWidth) || 0;
        const height = Number(img.naturalHeight || img.height || img.clientHeight) || 0;
        if (width > 0 && height > 0) return width / height;
      }
      const canvas = element instanceof HTMLCanvasElement ? element : element.querySelector('canvas');
      if (canvas) {
        const width = Number(canvas.width || canvas.clientWidth) || 0;
        const height = Number(canvas.height || canvas.clientHeight) || 0;
        if (width > 0 && height > 0) return width / height;
      }
      const svg = element.matches && element.matches('svg') ? element : element.querySelector('svg');
      if (svg) {
        const viewBox = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (viewBox.length >= 4 && viewBox[2] > 0 && viewBox[3] > 0) return viewBox[2] / viewBox[3];
      }
      const rect = element.getBoundingClientRect ? element.getBoundingClientRect() : null;
      if (rect && rect.width > 0 && rect.height > 0) return rect.width / rect.height;
      return 1;
    }

    /* Bộ tính kích thước hình dùng chung cho Trình chiếu Word và Dùng câu hỏi MVIP.
       Hình đạt tối đa rộng 1/2 hoặc cao 2/3 mặt phẳng trình chiếu, giữ đúng tỷ lệ,
       neo góc phải dưới và dùng cùng cơ chế cho chữ/phương án né hình. */
    function cv7991LayoutMultipleQuestionMedia(targetCard) {
      if (targetCard instanceof Element && targetCard.classList.contains('cv7991-source-question-layout')) return;
      if (!(targetCard instanceof HTMLElement)) return null;
      const panel = targetCard.querySelector('.word-presentation-media-panel');
      const shell = targetCard.querySelector('.word-presentation-content-shell');
      const children = panel ? Array.from(panel.children) : [];
      const multiple = !!(panel && !panel.hidden && shell && children.length > 1);
      targetCard.classList.toggle('cv7991-multiple-question-media', multiple);
      if (!multiple) return null;
      if (targetCard.classList.contains('cv7991-bottom-right-media-flow')
        || targetCard.classList.contains('cv7991-bottom-right-prompt-flow')) {
        cv7991ResetBottomRightMediaOptionFlow(targetCard);
      }
      // Mỗi đối tượng giữ một ô riêng; không để flex co ảnh về 0 khi bảng quá rộng.
      const slots = children.map((child) => {
        if (child.classList.contains('cv7991-multi-media-slot')) return child;
        const slot = document.createElement('div');
        slot.className = 'cv7991-multi-media-slot';
        const content = document.createElement('div');
        content.className = 'cv7991-multi-media-content';
        panel.insertBefore(slot, child);
        slot.appendChild(content);
        content.appendChild(child);
        return slot;
      });
      const cardStyle = getComputedStyle(targetCard);
      const paddingX = (parseFloat(cardStyle.paddingLeft) || 0) + (parseFloat(cardStyle.paddingRight) || 0);
      const paddingY = (parseFloat(cardStyle.paddingTop) || 0) + (parseFloat(cardStyle.paddingBottom) || 0);
      const viewport = targetCard.closest('.word-presentation-viewport, .regular-test-word-viewport');
      const width = Math.max(1, shell.clientWidth || Math.max(0, targetCard.clientWidth - paddingX)
        || parseFloat(targetCard.style.getPropertyValue('--wp-slide-width')) || 640);
      const height = Math.max(220, parseFloat(targetCard.style.getPropertyValue('--wp-slide-height'))
        || (viewport && viewport.clientHeight) || 720);
      const gap = 12;
      const columns = width >= 600 ? 2 : 1;
      const rows = Math.ceil(slots.length / columns);
      const cellWidth = Math.max(1, (width - gap * (columns - 1)) / columns);
      const textHeight = ['.word-presentation-question-line', '.word-presentation-items']
        .reduce((sum, selector) => {
          const element = shell.querySelector(selector);
          return sum + (element ? Math.max(element.offsetHeight, element.scrollHeight) : 0);
        }, 0);
      const remaining = height - paddingY - textHeight - gap * (rows + 1);
      // Nếu câu quá dài, giữ kích thước đọc được và để cơ chế cuộn chung xử lý.
      const minimumRowHeight = Math.max(160, Math.min(260, height * .48) / rows);
      const rowHeight = Math.max(minimumRowHeight, remaining / rows);
      panel.style.setProperty('--cv-multi-media-columns', String(columns));
      panel.style.setProperty('--cv-multi-media-gap', `${gap}px`);
      const sizes = slots.map((slot) => {
        const content = slot.firstElementChild;
        const media = content && content.firstElementChild;
        if (!media) return { width:0, height:0 };
        const isTable = media.matches('table, .single-exam-inline-table')
          || !!media.querySelector('table, .single-exam-inline-table');
        let naturalWidth = 0, naturalHeight = 0;
        if (isTable) {
          content.style.width = 'max-content';
          content.style.height = 'auto';
          content.style.transform = 'none';
          naturalWidth = Math.max(media.scrollWidth, media.offsetWidth, content.scrollWidth, content.offsetWidth) + 2;
          naturalHeight = Math.max(media.scrollHeight, media.offsetHeight, content.scrollHeight, content.offsetHeight) + 2;
        } else {
          const ratio = cv7991PresentationMediaAspectRatio(media);
          naturalWidth = parseFloat(media.style.getPropertyValue('--cv-presenter-base-width'))
            || Number(media.naturalWidth || media.width) || cellWidth;
          naturalHeight = naturalWidth / Math.max(.03, ratio);
        }
        naturalWidth = Math.max(1, naturalWidth);
        naturalHeight = Math.max(1, naturalHeight);
        const scale = Math.min(1, cellWidth / naturalWidth, rowHeight / naturalHeight);
        const visibleWidth = naturalWidth * scale;
        const visibleHeight = naturalHeight * scale;
        content.style.width = `${naturalWidth}px`;
        content.style.height = `${naturalHeight}px`;
        content.style.left = `${Math.max(0, (cellWidth - visibleWidth) / 2)}px`;
        content.style.transform = `scale(${scale})`;
        slot.style.height = `${Math.ceil(visibleHeight)}px`;
        slot.dataset.cvMediaScale = String(scale);
        return { width:visibleWidth, height:visibleHeight };
      });
      return { columns, rows, cellWidth, rowHeight, sizes };
    }

    function cv7991ApplyUnifiedSingleViewMediaMetrics(targetCard, targetViewport, isTableMediaFn = null) {
      if (targetCard instanceof Element && targetCard.classList.contains('cv7991-source-question-layout')) return;
      if (!(targetCard instanceof HTMLElement)) return null;
      const multiple = cv7991LayoutMultipleQuestionMedia(targetCard);
      if (multiple) return multiple;
      ['--wp-media-target-width', '--wp-media-target-height',
        '--mvip-figure-panel-width', '--mvip-figure-panel-height'].forEach((name) => {
        targetCard.style.removeProperty(name);
      });
      if (!(targetCard.classList.contains('media-layout-figure')
        || targetCard.classList.contains('media-layout-mixed'))) return null;

      const panel = targetCard.querySelector('.word-presentation-media-panel');
      if (!(panel instanceof HTMLElement) || panel.hidden) return null;
      const tablePredicate = typeof isTableMediaFn === 'function'
        ? isTableMediaFn
        : (typeof regularTestWordIsTableMedia === 'function' ? regularTestWordIsTableMedia : () => false);
      const mediaChildren = Array.from(panel.children).filter((child) => {
        return child instanceof Element && !tablePredicate(child);
      });
      if (!mediaChildren.length) return null;

      const ratio = mediaChildren
        .map(cv7991PresentationMediaAspectRatio)
        .find((value) => Number.isFinite(value) && value > 0.03 && value < 50) || 1;
      const slideWidth = Math.max(320,
        parseFloat(targetCard.style.getPropertyValue('--wp-slide-width'))
          || Number(targetCard.clientWidth)
          || Number(targetViewport && targetViewport.clientWidth)
          || 320
      );
      const slideHeight = Math.max(220,
        parseFloat(targetCard.style.getPropertyValue('--wp-slide-height'))
          || Number(targetCard.clientHeight)
          || Number(targetViewport && targetViewport.clientHeight)
          || 220
      );
      const maxWidth = Math.max(180, Math.floor(slideWidth * 0.5));
      const maxHeight = Math.max(140, Math.floor(slideHeight * (2 / 3)));
      let targetWidth = Math.min(maxWidth, Math.round(maxHeight * ratio));
      targetWidth = Math.max(160, targetWidth);
      let targetHeight = Math.max(120, Math.round(targetWidth / ratio));
      if (targetHeight > maxHeight) {
        targetHeight = maxHeight;
        targetWidth = Math.min(maxWidth, Math.max(160, Math.round(targetHeight * ratio)));
      }
      targetWidth = Math.max(1, Math.min(maxWidth, targetWidth));
      targetHeight = Math.max(1, Math.min(maxHeight, targetHeight));
      const gap = Math.max(8, Math.min(20, Math.round(slideWidth * 0.008)));

      targetCard.style.setProperty('--wp-media-target-width', `${Math.round(targetWidth)}px`);
      targetCard.style.setProperty('--wp-media-target-height', `${Math.round(targetHeight)}px`);
      targetCard.style.setProperty('--mvip-figure-panel-width', `${Math.round(targetWidth)}px`);
      targetCard.style.setProperty('--mvip-figure-panel-height', `${Math.round(targetHeight)}px`);
      const widthDriven = targetWidth >= maxWidth - 1;
      targetCard.classList.toggle('mvip-figure-width-target', widthDriven);
      targetCard.classList.toggle('mvip-figure-height-target', !widthDriven);
      targetCard.dataset.mvipFigureTarget = widthDriven ? 'width-one-half' : 'height-two-thirds';

      panel.style.setProperty('justify-self', 'end', 'important');
      panel.style.setProperty('align-self', 'end', 'important');
      panel.style.setProperty('align-items', 'flex-end', 'important');
      panel.style.setProperty('justify-content', 'flex-end', 'important');
      Array.from(panel.querySelectorAll('svg')).forEach((svg) => {
        try { svg.setAttribute('preserveAspectRatio', 'xMaxYMax meet'); } catch (_) {}
        if (svg instanceof SVGElement) {
          svg.style.setProperty('object-position', 'right bottom', 'important');
          svg.style.setProperty('transform-origin', 'right bottom', 'important');
        }
      });
      if (typeof cv7991ApplyBottomRightMediaOptionFlow === 'function') {
        cv7991ApplyBottomRightMediaOptionFlow(targetCard, targetWidth, targetHeight, gap);
      }
      return { width: targetWidth, height: targetHeight, ratio, gap, widthDriven };
    }

    function regularTestWordApplyMvipFigureLayout(card, availableWidth, availableHeight) {
      if (!(card instanceof HTMLElement)) return;
      regularTestWordResetMvipFigureLayout(card);
      if (Number(availableWidth) > 0) card.style.setProperty('--wp-slide-width', `${Number(availableWidth)}px`);
      if (Number(availableHeight) > 0) card.style.setProperty('--wp-slide-height', `${Number(availableHeight)}px`);
      const viewport = card.closest('.regular-test-word-viewport, .word-presentation-viewport');
      const api = window.mvipWordPresentationDisplay || null;
      if (api && typeof api.applySingleViewMediaMetrics === 'function') {
        try {
          api.applySingleViewMediaMetrics(card, viewport, regularTestWordIsTableMedia);
          return;
        } catch (_) {}
      }
      cv7991ApplyUnifiedSingleViewMediaMetrics(card, viewport, regularTestWordIsTableMedia);
    }

    function regularTestWordRefreshMediaLayout(card) {
      if (!(card instanceof Element)) return;
      const panel = card.querySelector('.word-presentation-media-panel');
      if (!(panel instanceof Element) || panel.hidden) return;
      const children = Array.from(panel.children).filter((child) => child instanceof Element);
      const tableChildren = children.filter(regularTestWordIsTableMedia);
      const imageChildren = children.filter((child) => !regularTestWordIsTableMedia(child));
      const tableContainsFigure = tableChildren.some((tableMedia) => Array.from(tableMedia.querySelectorAll(
        'img, canvas, svg, .single-exam-inline-vector, .single-exam-inline-media'
      )).some((visual) => !visual.closest('.single-exam-inline-formula')));
      card.classList.toggle('cv7991-pure-data-table',
        tableChildren.length > 0 && imageChildren.length === 0 && !tableContainsFigure);
      panel.classList.toggle('is-multiple-media', children.length > 1);
      card.classList.remove('media-layout-figure', 'media-layout-mixed', 'media-layout-table-horizontal', 'media-layout-table-vertical');
      if (imageChildren.length && tableChildren.length) {
        card.classList.add('media-layout-mixed');
      } else if (imageChildren.length) {
        card.classList.add('media-layout-figure');
      } else if (tableChildren.length) {
        const largest = tableChildren.map(regularTestWordTableVisualSize)
          .reduce((best, current) => current.area > best.area ? current : best, { width:0, height:0, area:0 });
        card.classList.add(largest.width > largest.height * 1.05
          ? 'media-layout-table-horizontal' : 'media-layout-table-vertical');
      }
      const optionText = Array.from(card.querySelectorAll('.word-presentation-item-content'))
        .map((element) => String(element.textContent || '').replace(/\s+/g, ' ').trim()).join(' ');
      const promptText = String(card.querySelector('.word-presentation-question-prompt')?.textContent || '')
        .replace(/\s+/g, ' ').trim();
      card.classList.toggle('media-needs-more-text', optionText.length > 180 || promptText.length > 260);
      cv7991LayoutMultipleQuestionMedia(card);
    }

    function regularTestWordPrepareMediaLayout(card) {
      if (!(card instanceof Element)) return;
      regularTestWordResetMvipFigureLayout(card);
      card.classList.remove('has-presentation-media', 'media-layout-figure', 'media-layout-mixed',
        'cv7991-multiple-question-media',
        'media-layout-table-horizontal', 'media-layout-table-vertical', 'media-without-items', 'media-needs-more-text',
        'cv7991-pure-data-table', 'cv7991-has-source-horizontal-table', 'cv7991-word-source-media-flow');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const prompt = card.querySelector('.word-presentation-question-prompt');
      const panel = card.querySelector('.word-presentation-media-panel');
      const items = card.querySelector('.word-presentation-items');
      if (!(questionLine instanceof Element) || !(panel instanceof Element)) return;
      if (cv7991PrepareSourceQuestionLayout(card)) return;
      const sourceWordMedia = regularTestWordSourceMediaElements(card)
        .filter((element) => !element.closest('.word-presentation-media-panel'));
      const smallFlowImages = sourceWordMedia.filter((element) =>
        element.classList.contains('cv7991-word-small-flow-image')
      );
      if (smallFlowImages.length) {
        /* Xử lý riêng ảnh nhỏ; không cho số lượng ảnh làm ảnh lớn ở lại luồng. */
        card.classList.add('cv7991-word-source-media-flow');
        regularTestWordScaleSourceMediaWithText(smallFlowImages);
        smallFlowImages.forEach((element) => {
          element.dataset.mvipMediaKind = 'inline-small-figure';
        });
      }
      const media = regularTestWordOrderMediaByWord(
        regularTestWordMediaCandidates(questionLine)
      );
      const sourceHorizontalTables = Array.from(questionLine.querySelectorAll(
        '.single-exam-inline-table.cv7991-source-horizontal-table'
      ));
      card.classList.toggle('cv7991-has-source-horizontal-table', sourceHorizontalTables.length > 0);
      if (!media.length) {
        panel.hidden = true;
        panel.innerHTML = '';
        return;
      }
      panel.hidden = false;
      panel.innerHTML = '';
      media.forEach((element) => {
        element.dataset.mvipMediaKind = regularTestWordIsTableMedia(element) ? 'table' : 'figure';
        try { panel.appendChild(element); } catch (_) {}
      });
      regularTestWordCleanPrompt(prompt);
      card.classList.add('has-presentation-media');
      card.classList.toggle('media-without-items', !(items instanceof Element));
      const refresh = () => {
        regularTestWordRefreshMediaLayout(card);
        scheduleRegularTestWordFit(true);
      };
      regularTestWordRefreshMediaLayout(card);
      requestAnimationFrame(() => requestAnimationFrame(refresh));
      Array.from(panel.querySelectorAll('img')).forEach((img) => {
        if (img.complete && img.naturalWidth > 0) return;
        img.addEventListener('load', refresh, { once:true });
        img.addEventListener('error', refresh, { once:true });
      });
    }

    function regularTestWordScaleFormulas(fontSize, card) {
      const api = window.mvipWordPresentationDisplay || null;
      if (api && typeof api.scaleFormulas === 'function') {
        try { api.scaleFormulas(fontSize, card); } catch (_) {}
      }
      if (typeof cv7991RefreshSingleLineOptionClasses === 'function') {
        try { cv7991RefreshSingleLineOptionClasses(card); } catch (_) {}
        if (api && typeof api.scaleFormulas === 'function') {
          try { api.scaleFormulas(fontSize, card); } catch (_) {}
        }
      }
    }

    // Cỡ chữ tối thiểu trên mặt phẳng màn hình lớn được tính theo point của Word.
    // Trình duyệt dùng 96 px/inch, vì vậy 20 pt = 20 × 96 / 72 = 26,666... px CSS.
    const CV7991_LARGE_SCREEN_MIN_FONT_PT = 20;
    const CV7991_LARGE_SCREEN_MIN_FONT_PX = CV7991_LARGE_SCREEN_MIN_FONT_PT * 96 / 72;

    function cv7991ResolveLargeCanvas(viewport, isFullscreen = false, mode = 'word') {
      if (!(viewport instanceof HTMLElement)) {
        return {
          designWidth: 1500,
          designHeight: 844,
          viewportWidth: 1500,
          viewportHeight: 844,
          scale: 1,
        };
      }

      const inset = 24;
      const viewportWidth = Math.max(1, Math.floor((Number(viewport.clientWidth) || 1) - inset));
      const viewportHeight = Math.max(1, Math.floor((Number(viewport.clientHeight) || 1) - inset));
      let designWidth = parseFloat(viewport.dataset.cv7991LargeCanvasWidth) || 0;
      let designHeight = parseFloat(viewport.dataset.cv7991LargeCanvasHeight) || 0;
      let largeCanvasConfirmed = viewport.dataset.cv7991LargeCanvasConfirmed === '1';

      const root = mode === 'regular'
        ? viewport.closest('.single-exam-presenter')
        : viewport.closest('.word-presentation-presenter');
      let effectiveFullscreen = !!isFullscreen;
      if (mode === 'regular' && root instanceof HTMLElement) {
        const nativeFullscreen = singleExamFullscreenElement() === root;
        const fallbackFullscreen = document.body.classList.contains('single-exam-fullscreen-fallback');
        const rootRect = root.getBoundingClientRect();
        const windowWidth = Math.max(1, Number(window.innerWidth) || Number(document.documentElement.clientWidth) || 1);
        const windowHeight = Math.max(1, Number(window.innerHeight) || Number(document.documentElement.clientHeight) || 1);
        const fillsWindow = rootRect.width >= windowWidth * 0.94
          && rootRect.height >= windowHeight * 0.88;
        /* Khi thoát native fullscreen, fullscreenElement đôi khi còn tồn tại trong
           một nhịp dù khung MVIP đã co về bên trái bảng học sinh. Không dùng nhịp
           chuyển tiếp đó làm mặt phẳng chuẩn, nếu không canvas bị ghi đè bằng kích
           thước thu nhỏ và nội dung sẽ giữ scale(1). */
        effectiveFullscreen = (nativeFullscreen || fallbackFullscreen)
          && (fallbackFullscreen || fillsWindow);
        if (!effectiveFullscreen && !fallbackFullscreen) {
          root.classList.remove('single-exam-expanded');
        }
      }
      const toolbar = root && root.querySelector(
        mode === 'regular' ? '.single-exam-toolbar' : '.word-presentation-toolbar'
      );
      let toolbarHeight = 0;
      if (toolbar instanceof HTMLElement) {
        toolbarHeight = Math.max(0, Math.ceil(toolbar.getBoundingClientRect().height || toolbar.offsetHeight || 0));
      }

      const screenWidth = Math.max(viewportWidth + inset,
        Number(window.screen && (window.screen.availWidth || window.screen.width)) || 0);
      const screenHeight = Math.max(viewportHeight + inset + toolbarHeight,
        Number(window.screen && (window.screen.availHeight || window.screen.height)) || 0);
      const estimatedWidth = Math.max(viewportWidth, Math.floor(screenWidth - inset));
      const estimatedHeight = Math.max(viewportHeight, Math.floor(screenHeight - toolbarHeight - inset));
      const dockedWordView = mode === 'word'
        && document.body.classList.contains('word-presentation-scan-split');
      const nearLargeScreen = !dockedWordView
        && viewportWidth >= estimatedWidth * 0.88
        && viewportHeight >= estimatedHeight * 0.78;

      const currentArea = viewportWidth * viewportHeight;
      if (!effectiveFullscreen && designWidth > 0 && designHeight > 0
        && (designWidth < estimatedWidth * 0.82 || designHeight < estimatedHeight * 0.70)) {
        designWidth = estimatedWidth;
        designHeight = estimatedHeight;
        largeCanvasConfirmed = false;
      }
      if (effectiveFullscreen) {
        /* Toàn màn hình là mặt phẳng chuẩn 1:1. Luôn lấy lại đúng kích thước
           viewport đang hiển thị, không giữ kích thước ước lượng hoặc kích thước
           của một màn hình lớn hơn từ lần đo trước. Nhờ đó 20 pt không còn bị
           nhân thêm hệ số 0,5–0,7 rồi nhìn như cỡ 8–10. Các lượt fit trễ sau
           fullscreenchange sẽ tự cập nhật lại nếu trình duyệt còn đang chuyển khung. */
        designWidth = viewportWidth;
        designHeight = viewportHeight;
        largeCanvasConfirmed = true;
      } else if (!(designWidth > 0 && designHeight > 0)) {
        designWidth = nearLargeScreen ? viewportWidth : estimatedWidth;
        designHeight = nearLargeScreen ? viewportHeight : estimatedHeight;
        largeCanvasConfirmed = nearLargeScreen;
      } else {
        const designArea = designWidth * designHeight;
        if (!dockedWordView && currentArea > designArea * 1.035
          && viewportWidth >= designWidth * 0.98
          && viewportHeight >= designHeight * 0.98) {
          designWidth = viewportWidth;
          designHeight = viewportHeight;
          largeCanvasConfirmed = true;
        }
      }

      designWidth = Math.max(320, Math.round(designWidth));
      designHeight = Math.max(220, Math.round(designHeight));
      viewport.dataset.cv7991LargeCanvasWidth = String(designWidth);
      viewport.dataset.cv7991LargeCanvasHeight = String(designHeight);
      viewport.dataset.cv7991LargeCanvasConfirmed = largeCanvasConfirmed ? '1' : '0';

      const scale = effectiveFullscreen ? 1 : Math.max(0.01, Math.min(
        1,
        viewportWidth / designWidth,
        viewportHeight / designHeight
      ));
      return {
        designWidth,
        designHeight,
        viewportWidth,
        viewportHeight,
        scale: Math.round(scale * 100000) / 100000,
      };
    }

    function cv7991ApplyProportionalCanvas(viewport, fitLayer, card, canvas, logicalHeight = 0) {
      if (!(viewport instanceof HTMLElement) || !(fitLayer instanceof HTMLElement)
        || !(card instanceof HTMLElement) || !canvas) return;
      const designWidth = Math.max(1, Number(canvas.designWidth) || 1);
      const designHeight = Math.max(1, Number(canvas.designHeight) || 1);
      const liveWidth = Math.max(1, (Number(viewport.clientWidth) || 1) - 24);
      const liveHeight = Math.max(1, (Number(viewport.clientHeight) || 1) - 24);
      let scale = Math.max(0.01, Math.min(
        1,
        Number(canvas.scale) || 1,
        liveWidth / designWidth,
        liveHeight / designHeight
      ));
      // Chừa một sai số rất nhỏ cho làm tròn CSS và thanh cuộn của bảng học sinh.
      if (scale < 0.999) scale = Math.max(0.01, scale * 0.995);
      scale = Math.round(scale * 100000) / 100000;
      const layerHeight = Math.max(1, Number(logicalHeight) || Number(card.offsetHeight) || designHeight);

      viewport.classList.remove('cv7991-vertical-scroll', 'cv7991-horizontal-scroll');
      viewport.style.setProperty('overflow', 'hidden', 'important');
      fitLayer.classList.add('cv7991-proportional-canvas');
      fitLayer.style.setProperty('position', 'absolute', 'important');
      fitLayer.style.setProperty('left', '50%', 'important');
      fitLayer.style.setProperty('top', '50%', 'important');
      fitLayer.style.setProperty('width', `${Math.round(designWidth * 100) / 100}px`, 'important');
      fitLayer.style.setProperty('height', `${Math.round(layerHeight * 100) / 100}px`, 'important');
      fitLayer.style.setProperty('min-width', '0px', 'important');
      fitLayer.style.setProperty('min-height', '0px', 'important');
      fitLayer.style.setProperty('max-width', 'none', 'important');
      fitLayer.style.setProperty('max-height', 'none', 'important');
      fitLayer.style.setProperty('margin', '0', 'important');
      fitLayer.style.setProperty('padding', '0', 'important');
      fitLayer.style.setProperty('display', 'block', 'important');
      fitLayer.style.setProperty('transform-origin', 'center center', 'important');
      fitLayer.style.setProperty('transform', `translate(-50%, -50%) scale(${scale})`, 'important');
      fitLayer.dataset.scale = String(scale);
      fitLayer.dataset.cv7991LargeCanvas = `${Math.round(designWidth)}x${Math.round(designHeight)}`;

      ['position', 'left', 'top', 'transform', 'transform-origin'].forEach((name) => {
        card.style.removeProperty(name);
      });
      card.dataset.cv7991ViewportScale = String(scale);
    }

    function cv7991SetVerticalScrollMode(viewport, fitLayer, card, enabled, options = {}) {
      if (!(viewport instanceof HTMLElement) || !(fitLayer instanceof HTMLElement) || !(card instanceof HTMLElement)) return;
      const shell = card.querySelector('.word-presentation-content-shell');
      const config = (options && typeof options === 'object') ? options : { designHeight: options };

      if (enabled) {
        const designWidth = Math.max(1, Number(config.designWidth) || Number(card.offsetWidth) || 1500);
        const designHeight = Math.max(1, Number(config.designHeight) || Number(viewport.clientHeight) || 844);
        const liveWidth = Math.max(1, (Number(viewport.clientWidth) || 1) - 24);
        let scale = Math.max(0.01, Math.min(
          1,
          Number(config.viewportScale) || 1,
          liveWidth / designWidth
        ));
        if (scale < 0.999) scale = Math.max(0.01, scale * 0.995);
        scale = Math.round(scale * 100000) / 100000;
        let paddingTop = 0;
        let paddingBottom = 0;
        try {
          const style = getComputedStyle(card);
          paddingTop = parseFloat(style.paddingTop) || 0;
          paddingBottom = parseFloat(style.paddingBottom) || 0;
        } catch (_) {}
        const shellMinHeight = Math.max(0, designHeight - paddingTop - paddingBottom);

        viewport.classList.add('cv7991-vertical-scroll');
        card.classList.add('cv7991-vertical-overflow');
        fitLayer.classList.remove('cv7991-proportional-canvas');
        card.style.setProperty('--cv7991-scroll-card-min-height', `${Math.round(designHeight * 100) / 100}px`);
        card.style.setProperty('--cv7991-scroll-shell-min-height', `${Math.round(shellMinHeight * 100) / 100}px`);

        card.style.setProperty('position', 'absolute', 'important');
        card.style.setProperty('left', '0px', 'important');
        card.style.setProperty('top', '0px', 'important');
        card.style.setProperty('width', `${Math.round(designWidth * 100) / 100}px`, 'important');
        card.style.setProperty('min-width', `${Math.round(designWidth * 100) / 100}px`, 'important');
        card.style.setProperty('max-width', `${Math.round(designWidth * 100) / 100}px`, 'important');
        card.style.setProperty('height', 'auto', 'important');
        card.style.setProperty('min-height', `${Math.round(designHeight * 100) / 100}px`, 'important');
        card.style.setProperty('max-height', 'none', 'important');
        card.style.setProperty('overflow', 'visible', 'important');
        card.style.setProperty('transform-origin', 'top left', 'important');
        card.style.setProperty('transform', `scale(${scale})`, 'important');
        card.dataset.cv7991ViewportScale = String(scale);

        if (shell instanceof HTMLElement) {
          shell.style.setProperty('height', 'auto', 'important');
          shell.style.setProperty('min-height', `${Math.round(shellMinHeight * 100) / 100}px`, 'important');
          shell.style.setProperty('max-height', 'none', 'important');
          shell.style.setProperty('overflow', 'visible', 'important');
        }

        void card.offsetHeight;
        const logicalHeight = Math.max(
          designHeight,
          Number(config.contentHeight) || 0,
          cv7991CardVerticalExtent(card)
        );
        const logicalWidth = Math.max(
          designWidth,
          Number(config.contentWidth) || 0,
          Number(card.scrollWidth) || 0
        );
        const visualWidth = Math.max(1, logicalWidth * scale);
        const visualHeight = Math.max(1, logicalHeight * scale);
        const horizontalOverflow = visualWidth > Math.max(1, Number(viewport.clientWidth) || 1) + 1;
        viewport.classList.toggle('cv7991-horizontal-scroll', horizontalOverflow);
        viewport.style.setProperty('overflow-y', 'auto', 'important');
        viewport.style.setProperty('overflow-x', horizontalOverflow ? 'auto' : 'hidden', 'important');

        fitLayer.style.setProperty('position', 'relative', 'important');
        fitLayer.style.setProperty('left', 'auto', 'important');
        fitLayer.style.setProperty('top', 'auto', 'important');
        fitLayer.style.setProperty('width', `${Math.round(visualWidth * 100) / 100}px`, 'important');
        fitLayer.style.setProperty('height', `${Math.round(visualHeight * 100) / 100}px`, 'important');
        fitLayer.style.setProperty('min-width', '0px', 'important');
        fitLayer.style.setProperty('min-height', '0px', 'important');
        fitLayer.style.setProperty('max-width', 'none', 'important');
        fitLayer.style.setProperty('max-height', 'none', 'important');
        fitLayer.style.setProperty('margin', '12px auto', 'important');
        fitLayer.style.setProperty('padding', '0', 'important');
        fitLayer.style.setProperty('display', 'block', 'important');
        fitLayer.style.setProperty('transform', 'none', 'important');
        fitLayer.style.setProperty('transform-origin', 'top left', 'important');
        fitLayer.dataset.scale = String(scale);
        fitLayer.dataset.cv7991LargeCanvas = `${Math.round(designWidth)}x${Math.round(designHeight)}`;
        return;
      }

      viewport.classList.remove('cv7991-vertical-scroll', 'cv7991-horizontal-scroll');
      viewport.style.removeProperty('overflow');
      viewport.style.removeProperty('overflow-y');
      viewport.style.removeProperty('overflow-x');
      card.classList.remove('cv7991-vertical-overflow');
      card.style.removeProperty('--cv7991-scroll-card-min-height');
      card.style.removeProperty('--cv7991-scroll-shell-min-height');
      ['position', 'left', 'top', 'width', 'min-width', 'max-width', 'height', 'min-height',
        'max-height', 'overflow', 'transform', 'transform-origin'].forEach((name) => card.style.removeProperty(name));
      if (shell instanceof HTMLElement) {
        ['height', 'min-height', 'max-height', 'overflow'].forEach((name) => shell.style.removeProperty(name));
      }
      fitLayer.classList.remove('cv7991-proportional-canvas');
      ['position', 'left', 'top', 'width', 'height', 'min-width', 'min-height', 'max-width',
        'max-height', 'margin', 'padding', 'display', 'transform', 'transform-origin'].forEach((name) => {
        fitLayer.style.removeProperty(name);
      });
      fitLayer.dataset.scale = '1';
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
    }

    function cv7991CardVerticalExtent(card) {
      if (!(card instanceof HTMLElement)) return 1;
      const cardRect = card.getBoundingClientRect();
      let paddingBottom = 0;
      try { paddingBottom = parseFloat(getComputedStyle(card).paddingBottom) || 0; } catch (_) {}
      let extent = Math.max(1, Number(card.scrollHeight) || 0, Number(card.offsetHeight) || 0);
      const shell = card.querySelector('.word-presentation-content-shell');
      if (shell instanceof HTMLElement) {
        const shellRect = shell.getBoundingClientRect();
        const shellTop = Math.max(0, shellRect.top - cardRect.top);
        extent = Math.max(extent, shellTop + Math.max(shell.scrollHeight, shell.offsetHeight) + paddingBottom);
      }
      Array.from(card.querySelectorAll(
        '.word-presentation-question-line, .word-presentation-items, .word-presentation-item, '
        + '.word-presentation-media-panel, table, .single-exam-inline-table, '
        + '.single-exam-inline-media:not(.single-exam-inline-formula), '
        + '.single-exam-inline-vector:not(.single-exam-inline-formula), canvas'
      )).forEach((element) => {
        if (!(element instanceof Element) || element.hidden) return;
        const rect = element.getBoundingClientRect();
        if (!(rect.width > 0 || rect.height > 0)) return;
        extent = Math.max(extent, rect.bottom - cardRect.top + paddingBottom);
      });
      return Math.max(1, Math.ceil(extent));
    }

    function cv7991HorizontalTableVerticalFits(card) {
      if (!(card instanceof Element)
        || !card.classList.contains('media-layout-table-horizontal')
        || !card.classList.contains('media-without-items')) return true;
      const shell = card.querySelector('.word-presentation-content-shell');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const panel = card.querySelector('.word-presentation-media-panel');
      const table = panel && panel.querySelector('table, .single-exam-inline-table');
      if (!(shell instanceof Element) || !(questionLine instanceof Element)
        || !(panel instanceof Element) || !(table instanceof Element)) return true;
      const shellRect = shell.getBoundingClientRect();
      const questionRect = questionLine.getBoundingClientRect();
      const panelRect = panel.getBoundingClientRect();
      const tableRect = table.getBoundingClientRect();
      const tolerance = 1.25;
      return questionRect.top >= shellRect.top - tolerance
        && questionRect.bottom <= panelRect.top + tolerance
        && panelRect.bottom <= shellRect.bottom + tolerance
        && tableRect.top >= panelRect.top - tolerance
        && tableRect.bottom <= panelRect.bottom + tolerance;
    }

    function cv7991PresentationCardMeasurements(targetCard) {
      if (!(targetCard instanceof HTMLElement)) return { width: 1, height: 1 };
      return {
        width: Math.max(1, Math.ceil(targetCard.scrollWidth || targetCard.offsetWidth || 1)),
        height: Math.max(1, Math.ceil(targetCard.scrollHeight || targetCard.offsetHeight || 1)),
      };
    }

    function cv7991PureHorizontalTableWithoutItemsFits(targetCard) {
      if (!(targetCard instanceof Element)
        || !targetCard.classList.contains('media-layout-table-horizontal')
        || !targetCard.classList.contains('media-without-items')
        || !targetCard.classList.contains('cv7991-pure-data-table')) return true;
      const shell = targetCard.querySelector('.word-presentation-content-shell');
      const questionLine = targetCard.querySelector('.word-presentation-question-line');
      const panel = targetCard.querySelector('.word-presentation-media-panel');
      const table = panel && panel.querySelector('table, .single-exam-inline-table');
      if (!(shell instanceof Element) || !(questionLine instanceof Element)
        || !(panel instanceof Element) || !(table instanceof Element)) return true;
      const shellRect = shell.getBoundingClientRect();
      const questionRect = questionLine.getBoundingClientRect();
      const panelRect = panel.getBoundingClientRect();
      const tableRect = table.getBoundingClientRect();
      const tolerance = 1.25;
      return questionRect.top >= shellRect.top - tolerance
        && questionRect.bottom <= panelRect.top + tolerance
        && panelRect.bottom <= shellRect.bottom + tolerance
        && tableRect.top >= panelRect.top - tolerance
        && tableRect.bottom <= panelRect.bottom + tolerance
        && tableRect.left >= panelRect.left - tolerance
        && tableRect.right <= panelRect.right + tolerance;
    }

    function cv7991PresentationCardFits(targetCard, availableWidth, availableHeight) {
      const measured = cv7991PresentationCardMeasurements(targetCard);
      return measured.width <= Number(availableWidth) + 1
        && measured.height <= Number(availableHeight) + 1
        && cv7991PureHorizontalTableWithoutItemsFits(targetCard);
    }

    function fitRegularTestWordSlide() {
      if (!els.singleExamSlide || !els.singleExamSlide.classList.contains('single-exam-word-live-mode')) return;
      const viewport = els.singleExamSlide.querySelector('.regular-test-word-viewport');
      const fitLayer = els.singleExamSlide.querySelector('.regular-test-word-fit-layer');
      const card = els.singleExamSlide.querySelector('.regular-test-word-card');
      if (!(viewport instanceof HTMLElement) || !(fitLayer instanceof HTMLElement) || !(card instanceof HTMLElement)) return;

      if (cv7991FitSourceQuestion(viewport, fitLayer, card)) return;

      const previousScrollScale = Math.max(0.01,
        parseFloat(card.dataset.cv7991ViewportScale) || parseFloat(fitLayer.dataset.scale) || 1
      );
      const previousLogicalScrollTop = viewport.classList.contains('cv7991-vertical-scroll')
        ? Math.max(0, Number(viewport.scrollTop) || 0) / previousScrollScale
        : 0;
      const canvas = cv7991ResolveLargeCanvas(
        viewport,
        typeof singleExamIsFullscreen === 'function' && singleExamIsFullscreen(),
        'regular'
      );
      cv7991SetVerticalScrollMode(viewport, fitLayer, card, false);
      const availableWidth = canvas.designWidth;
      const availableHeight = canvas.designHeight;

      fitLayer.style.setProperty('position', 'absolute', 'important');
      fitLayer.style.setProperty('left', '50%', 'important');
      fitLayer.style.setProperty('top', '50%', 'important');
      fitLayer.style.setProperty('width', `${availableWidth}px`, 'important');
      fitLayer.style.setProperty('height', `${availableHeight}px`, 'important');
      fitLayer.style.setProperty('transform', 'translate(-50%, -50%) scale(1)', 'important');
      fitLayer.style.setProperty('transform-origin', 'center center', 'important');

      card.style.setProperty('width', `${availableWidth}px`, 'important');
      card.style.setProperty('min-width', `${availableWidth}px`, 'important');
      card.style.setProperty('max-width', `${availableWidth}px`, 'important');
      card.style.setProperty('--wp-slide-width', `${availableWidth}px`);
      card.style.setProperty('--wp-slide-height', `${availableHeight}px`);
      const hasMedia = card.classList.contains('has-presentation-media');
      if (hasMedia) {
        card.style.setProperty('height', `${availableHeight}px`, 'important');
        card.style.setProperty('min-height', `${availableHeight}px`, 'important');
        card.style.setProperty('max-height', `${availableHeight}px`, 'important');
      } else {
        card.style.removeProperty('height');
        card.style.removeProperty('min-height');
        card.style.removeProperty('max-height');
      }

      regularTestWordApplyMvipFigureLayout(card, availableWidth, availableHeight);
      const minFont = CV7991_LARGE_SCREEN_MIN_FONT_PX;
      const maxFont = hasMedia
        ? (card.classList.contains('media-layout-table-vertical') ? 86 : 74)
        : Math.max(84, Math.min(176, Math.floor(availableHeight * 0.29)));
      const applyFont = (fontSize) => {
        card.style.setProperty('font-size', `${fontSize}px`, 'important');
        regularTestWordScaleFormulas(fontSize, card);
        if (hasMedia) cv7991ApplyBottomRightMediaOptionFlow(card);
      };
      const fits = () => cv7991PresentationCardFits(card, availableWidth, availableHeight);

      let low = minFont;
      let high = maxFont;
      let best = minFont;
      applyFont(minFont);
      if (fits()) {
        for (let round = 0; round < 16; round += 1) {
          const candidate = (low + high) / 2;
          applyFont(candidate);
          if (fits()) { best = candidate; low = candidate; }
          else high = candidate;
        }
      }

      const finalFont = Math.max(minFont, Math.floor(best * 10) / 10);
      applyFont(finalFont);
      card.dataset.adaptiveFontSize = String(finalFont);
      card.dataset.cv7991LogicalFontSize = String(finalFont);
      card.dataset.cv7991LogicalFontPoints = String(Math.round(finalFont * 72 / 96 * 100) / 100);
      card.dataset.cv7991DisplayedFontSize = String(Math.round(finalFont * canvas.scale * 100) / 100);
      card.dataset.cv7991DisplayedFontPoints = String(Math.round(finalFont * canvas.scale * 72 / 96 * 100) / 100);

      const measured = cv7991PresentationCardMeasurements(card);
      const measuredWidth = measured.width;
      const measuredHeight = cv7991CardVerticalExtent(card);
      const verticalOverflow = measuredHeight > availableHeight + 1
        || !cv7991HorizontalTableVerticalFits(card);
      const horizontalOverflow = measuredWidth > availableWidth + 1;
      if (verticalOverflow || horizontalOverflow) {
        if (verticalOverflow && (card.classList.contains('media-layout-figure')
          || card.classList.contains('media-layout-mixed'))) {
          cv7991ResetBottomRightMediaOptionFlow(card);
        }
        const scrollOptions = {
          designWidth: availableWidth,
          designHeight: availableHeight,
          viewportScale: canvas.scale,
          contentWidth: measuredWidth,
          contentHeight: measuredHeight,
        };
        cv7991SetVerticalScrollMode(viewport, fitLayer, card, true, scrollOptions);
        applyFont(finalFont);
        scrollOptions.contentWidth = Math.max(measuredWidth, card.scrollWidth || 0);
        scrollOptions.contentHeight = Math.max(measuredHeight, cv7991CardVerticalExtent(card));
        cv7991SetVerticalScrollMode(viewport, fitLayer, card, true, scrollOptions);
        void viewport.offsetHeight;
        viewport.scrollTop = previousLogicalScrollTop * canvas.scale;
        viewport.scrollLeft = 0;
        return;
      }

      const logicalLayerHeight = hasMedia ? availableHeight : measuredHeight;
      cv7991ApplyProportionalCanvas(viewport, fitLayer, card, canvas, logicalLayerHeight);
    }

    function regularTestWordFitSignature() {
      if (!els.singleExamSlide) return '';
      const viewport = els.singleExamSlide.querySelector('.regular-test-word-viewport');
      const card = els.singleExamSlide.querySelector('.regular-test-word-card');
      if (!(viewport instanceof HTMLElement) || !(card instanceof HTMLElement)) return '';
      const pendingImages = Array.from(card.querySelectorAll('img')).reduce((count, image) => {
        return count + ((!image.complete || !image.naturalWidth) ? 1 : 0);
      }, 0);
      return [
        Math.round(Number(viewport.clientWidth) || 0),
        Math.round(Number(viewport.clientHeight) || 0),
        viewport.dataset.cv7991LargeCanvasWidth || '',
        viewport.dataset.cv7991LargeCanvasHeight || '',
        document.body.classList.contains('desktop-fixed-right') ? 1 : 0,
        document.body.classList.contains('single-exam-fullscreen-fallback') ? 1 : 0,
        Number(state.regularTestSession && state.regularTestSession.index) || 0,
        singleExamIsFullscreen() ? 1 : 0,
        card.className,
        card.querySelectorAll('.single-exam-word-option').length,
        card.querySelectorAll('.single-exam-inline-formula').length,
        pendingImages,
      ].join('|');
    }

    function regularTestWordRunFitOnce() {
      if (regularTestWordFitRunning) {
        regularTestWordFitPending = true;
        return;
      }
      regularTestWordFitRunning = true;
      try {
        fitRegularTestWordSlide();
      } catch (_) {
      } finally {
        regularTestWordFitRunning = false;
        regularTestWordFitLastRunAt = performance.now();
        regularTestWordFitLastSignature = regularTestWordFitSignature();
        if (regularTestWordFitPending) {
          regularTestWordFitPending = false;
          regularTestWordFitDirty = true;
          if (!regularTestWordFitFrame) {
            regularTestWordFitFrame = requestAnimationFrame(() => {
              regularTestWordFitFrame = 0;
              if (!regularTestWordFitDirty) return;
              regularTestWordFitDirty = false;
              regularTestWordRunFitOnce();
            });
          }
        }
      }
    }

    function scheduleRegularTestWordFit(forceNow = false) {
      const now = performance.now();
      const signature = regularTestWordFitSignature();
      const sameRecentLayout = signature === regularTestWordFitLastSignature
        && now - regularTestWordFitLastRunAt < 140;

      regularTestWordFitDirty = true;
      if (forceNow && !sameRecentLayout && !regularTestWordFitRunning) {
        regularTestWordFitDirty = false;
        regularTestWordRunFitOnce();
      }
      if (!regularTestWordFitFrame) {
        regularTestWordFitFrame = requestAnimationFrame(() => {
          regularTestWordFitFrame = 0;
          if (!regularTestWordFitDirty) return;
          const nextSignature = regularTestWordFitSignature();
          if (nextSignature === regularTestWordFitLastSignature
            && performance.now() - regularTestWordFitLastRunAt < 90) {
            regularTestWordFitDirty = false;
            return;
          }
          regularTestWordFitDirty = false;
          regularTestWordRunFitOnce();
        });
      }
      if (regularTestWordFitSettleTimer) clearTimeout(regularTestWordFitSettleTimer);
      regularTestWordFitSettleTimer = setTimeout(() => {
        regularTestWordFitSettleTimer = 0;
        if (!els.singleExamSlide
          || !els.singleExamSlide.classList.contains('single-exam-word-live-mode')) return;
        const settledSignature = regularTestWordFitSignature();
        if (settledSignature !== regularTestWordFitLastSignature
          || performance.now() - regularTestWordFitLastRunAt > 420) {
          regularTestWordFitDirty = false;
          regularTestWordRunFitOnce();
        }
      }, 180);
    }

    function ensureRegularTestWordResizeObserver() {
      if (typeof ResizeObserver !== 'function' || !els.singleExamSlide) return;
      const viewport = els.singleExamSlide.querySelector('.regular-test-word-viewport');
      if (!(viewport instanceof HTMLElement)) return;
      if (!regularTestWordResizeObserver) {
        regularTestWordResizeObserver = new ResizeObserver((entries) => {
          const entry = Array.isArray(entries) ? entries[entries.length - 1] : null;
          const target = entry && entry.target instanceof HTMLElement
            ? entry.target : regularTestWordObservedViewport;
          if (!(target instanceof HTMLElement)) return;
          const rect = entry && entry.contentRect;
          const width = Math.round(Number(rect && rect.width) || Number(target.clientWidth) || 0);
          const height = Math.round(Number(rect && rect.height) || Number(target.clientHeight) || 0);
          if (Math.abs(width - regularTestWordObservedWidth) <= 1
            && Math.abs(height - regularTestWordObservedHeight) <= 1) return;
          regularTestWordObservedWidth = width;
          regularTestWordObservedHeight = height;
          if (els.singleExamSlide.classList.contains('single-exam-word-live-mode')) {
            scheduleRegularTestWordFit();
          }
        });
      }
      if (regularTestWordObservedViewport !== viewport) {
        regularTestWordResizeObserver.disconnect();
        regularTestWordObservedViewport = viewport;
        regularTestWordObservedWidth = Math.round(Number(viewport.clientWidth) || 0);
        regularTestWordObservedHeight = Math.round(Number(viewport.clientHeight) || 0);
        regularTestWordResizeObserver.observe(viewport);
      }
    }

    function renderRegularTestWordSlide(item, qNo) {
      if (!els.singleExamSlide || !item) return false;
      const token = ++regularTestWordRenderToken;
      regularTestWordClearFitTimers();
      els.singleExamSlide.classList.remove('single-exam-image-mode');
      els.singleExamSlide.classList.add('single-exam-word-live-mode');
      els.singleExamSlide.innerHTML = regularTestWordSlideHtml(item, qNo);
      const card = els.singleExamSlide.querySelector('.regular-test-word-card');
      if (!(card instanceof HTMLElement)) return false;
      regularTestWordPrepareMediaLayout(card);
      ensureRegularTestWordResizeObserver();
      Array.from(card.querySelectorAll('img')).forEach((img) => {
        if (img.complete && img.naturalWidth > 0) return;
        const refresh = () => {
          if (token !== regularTestWordRenderToken) return;
          regularTestWordRefreshMediaLayout(card);
          scheduleRegularTestWordFit(true);
        };
        img.addEventListener('load', refresh, { once:true });
        img.addEventListener('error', refresh, { once:true });
      });
      scheduleRegularTestWordFit(true);
      return true;
    }

    function updateRegularTestScanUi(answered = answeredStats().answered) {
      if (!els.singleExamViewBtn) return;
      const finished = !isRegularTestSessionActive()
        || regularTestQuestionNo() > state.regularTestSession.slides.length;
      const item = currentRegularTestSlide();
      const groupedTf = regularTestGroupedTfSlide(item);
      const activeTf = groupedTf ? regularTestActiveTfLetter(item) : '';
      const canShowScanResult = !finished && answered > 0 && !state.examPreviewDone && !(groupedTf && !activeTf);
      els.singleExamViewBtn.hidden = !canShowScanResult;
      els.singleExamViewBtn.disabled = !canShowScanResult;
      const label = 'Kết quả quét';
      if (els.singleExamViewBtn.textContent !== label) els.singleExamViewBtn.textContent = label;
      if (groupedTf) regularTestUpdateTfScanRows();
    }

    function renderRegularTestPresenter() {
      if (!els.singleExamPresenter || !els.singleExamSlide) return;
      regularTestWordCloseDirectImageZoom();
      refreshSingleExamClassOptions();
      if (!isRegularTestSessionActive()) {
        els.singleExamPresenter.hidden = true;
        document.body.classList.remove('single-exam-presenting');
        if (els.singleExamToolbarGuideBtn) {
          els.singleExamToolbarGuideBtn.hidden = true;
          els.singleExamToolbarGuideBtn.disabled = true;
        }
        if (els.singleExamAnswerBtn) {
          setRegularTestAnswerButtonActive(false);
          els.singleExamAnswerBtn.disabled = true;
        }
        return;
      }
      const session = state.regularTestSession;
      const qNo = regularTestQuestionNo();
      const total = session.slides.length;
      const currentIndex = Math.max(0, qNo - 1);
      if (els.singleExamGuideModal && !els.singleExamGuideModal.hidden
        && els.singleExamGuideModal.dataset.questionIndex !== String(currentIndex)) {
        closeSingleExamGuide();
      }
      const mon = normMonKey(state.currentMon || '');
      const presenterTitle = (session && session.title) || mon || 'Kiểm tra ngay';
      els.singleExamTitleText.textContent = presenterTitle;
      els.singleExamTitleText.title = (session && session.fullTitle) || presenterTitle;
      els.singleExamPresenter.hidden = false;
      document.body.classList.add('single-exam-presenting');
      updateSingleExamFullscreenButton();
      resetSingleExamRegionTool();

      if (qNo > total) {
        closeSingleExamGuide();
        if (els.singleExamGuideBtn) {
          els.singleExamGuideBtn.hidden = true;
          els.singleExamGuideBtn.disabled = true;
        }
        if (els.singleExamToolbarGuideBtn) {
          els.singleExamToolbarGuideBtn.hidden = true;
          els.singleExamToolbarGuideBtn.disabled = true;
        }
        els.singleExamProgressText.textContent = `Đã hoàn thành ${total}/${total} câu.`;
        els.singleExamSlide.classList.remove('single-exam-image-mode', 'single-exam-word-live-mode');
        els.singleExamSlide.innerHTML = `<div class="single-exam-end-box">Đã hoàn thành</div>`;
        if (els.regularTestPrevBtn) { els.regularTestPrevBtn.hidden = false; els.regularTestPrevBtn.disabled = total < 1; }
        if (els.regularTestNextBtn) { els.regularTestNextBtn.hidden = false; els.regularTestNextBtn.disabled = true; }
        if (els.regularTestQuestionState) els.regularTestQuestionState.hidden = true;
        if (els.singleExamNextBtn) { els.singleExamNextBtn.hidden = true; els.singleExamNextBtn.disabled = true; els.singleExamNextBtn.textContent = 'Đã xong'; }
        if (els.singleExamViewBtn) { els.singleExamViewBtn.hidden = true; els.singleExamViewBtn.disabled = true; els.singleExamViewBtn.textContent = 'Kết quả quét'; }
        if (els.singleExamAnswerBtn) {
          setRegularTestAnswerButtonActive(false);
          els.singleExamAnswerBtn.disabled = true;
        }
        clearRegularTestAnswerHighlights();
        updateSingleExamRegionButton();
        return;
      }

      const item = session.slides[qNo - 1] || null;
      const hasGuide = singleExamSlideHasGuide(item);
      if (els.singleExamGuideBtn) {
        els.singleExamGuideBtn.disabled = !hasGuide;
        els.singleExamGuideBtn.title = hasGuide
          ? 'Xem hướng dẫn giải của câu hiện tại'
          : 'Câu hiện tại không có hướng dẫn giải';
      }
      if (els.singleExamToolbarGuideBtn) {
        els.singleExamToolbarGuideBtn.hidden = !hasGuide;
        els.singleExamToolbarGuideBtn.disabled = !hasGuide;
        els.singleExamToolbarGuideBtn.title = hasGuide
          ? 'Xem hướng dẫn giải của câu hiện tại'
          : 'Câu hiện tại không có hướng dẫn giải';
      }
      els.singleExamProgressText.textContent = `Câu ${qNo}/${total}`;
      const answered = answeredStats().answered;
      if (els.regularTestPrevBtn) {
        els.regularTestPrevBtn.hidden = false;
        els.regularTestPrevBtn.disabled = qNo <= 1;
      }
      if (els.regularTestNextBtn) {
        els.regularTestNextBtn.hidden = false;
        els.regularTestNextBtn.disabled = qNo >= total;
      }
      if (els.regularTestQuestionState) els.regularTestQuestionState.hidden = true;
      if (els.singleExamNextBtn) {
        els.singleExamNextBtn.hidden = true;
        els.singleExamNextBtn.disabled = true;
        els.singleExamNextBtn.textContent = qNo >= total ? 'Lưu / Kết thúc' : 'Lưu / Câu tiếp';
        els.singleExamNextBtn.title = 'Nút này đã được ẩn trong chế độ Câu hỏi của Mvip; hãy bấm Kết quả quét rồi Lưu ở bảng kết quả.';
      }
      updateRegularTestScanUi(answered);
      if (els.singleExamAnswerBtn) els.singleExamAnswerBtn.disabled = false;
      if (!item) {
        els.singleExamSlide.classList.remove('single-exam-image-mode', 'single-exam-word-live-mode');
        els.singleExamSlide.innerHTML = `<div class="single-exam-end-box">Thiếu nội dung câu ${qNo}.</div>`;
        setRegularTestAnswerButtonActive(false);
        if (els.singleExamAnswerBtn) els.singleExamAnswerBtn.disabled = true;
        updateSingleExamRegionButton();
        return;
      }
      const hasLiveContent = !!(String(item && (item.promptHtml || item.prompt) || '').trim()
        || (Array.isArray(item && item.options) && item.options.length));
      const hasSlideImage = !!String(item.imageDataUrl || '').trim();
      const imageFreed = regularTestQuestionSaved(qNo - 1) && !hasSlideImage && !!(item && item.imageFreedAfterScan);
      if (hasLiveContent && renderRegularTestWordSlide(item, qNo)) {
        // Nội dung được dựng trực tiếp bằng cùng kiểu hiển thị với Trình chiếu Word.
      } else if (hasSlideImage) {
        els.singleExamSlide.classList.remove('single-exam-word-live-mode');
        els.singleExamSlide.classList.add('single-exam-image-mode');
        els.singleExamSlide.innerHTML = `<div class="single-exam-image-wrap"><img class="single-exam-captured-image" src="${String(item.imageDataUrl || '').trim()}" alt="Câu ${escapeHtml(String(item.displayNumber || item.label || qNo))}"></div>`;
      } else if (imageFreed) {
        els.singleExamSlide.classList.remove('single-exam-image-mode', 'single-exam-word-live-mode');
        els.singleExamSlide.innerHTML = `<div class="single-exam-end-box">Câu ${escapeHtml(String(qNo))} đã quét<br><span style="font-size:.5em;font-weight:700">Ảnh câu này đã được xóa khỏi bộ nhớ trình duyệt.</span></div>`;
      } else {
        els.singleExamSlide.classList.remove('single-exam-image-mode', 'single-exam-word-live-mode');
        els.singleExamSlide.innerHTML = singleExamSlideInnerHtml(item, qNo);
      }
      regularTestWordPrepareDirectImageZoom(els.singleExamSlide);
      regularTestApplyManualSelectionClasses(item);
      applyRegularTestAnswerHighlight();
      if (regularTestGroupedTfSlide(item)) regularTestUpdateTfScanRows();
      updateSingleExamRegionButton();
    }

    function regularTestQuestionSaved(index = null) {
      const session = state.regularTestSession || {};
      const qIndex = index == null ? (parseInt(String(session.index || 0), 10) || 0) : Math.max(0, parseInt(String(index), 10) || 0);
      const slide = Array.isArray(session.slides) ? session.slides[qIndex] : null;
      if (regularTestGroupedTfSlide(slide)) return regularTestTfAllFinished(slide);
      const saved = session.savedQuestions || {};
      return !!saved[String(qIndex + 1)];
    }

    function regularTestDiscardQuestionImage(index = null) {
      const session = state.regularTestSession || {};
      const qIndex = index == null ? (parseInt(String(session.index || 0), 10) || 0) : Math.max(0, parseInt(String(index), 10) || 0);
      if (!regularTestQuestionSaved(qIndex)) return false;
      const slide = Array.isArray(session.slides) ? session.slides[qIndex] : null;
      if (!slide || !String(slide.imageDataUrl || '').trim()) return false;
      slide.imageDataUrl = '';
      slide.imageFreedAfterScan = true;
      return true;
    }

    function gotoRegularTestQuestion(targetIndex) {
      if (!isRegularTestSessionActive()) return;
      const session = state.regularTestSession;
      const total = Array.isArray(session.slides) ? session.slides.length : 0;
      if (!total) return;
      const currentIndex = parseInt(String(session.index || 0), 10) || 0;
      const nextIndex = Math.max(0, Math.min(total - 1, parseInt(String(targetIndex), 10) || 0));
      if (nextIndex === currentIndex && !state.examPreviewDone) return;
      regularTestDiscardQuestionImage(currentIndex);
      closeSingleExamGuide();
      clearCurrentQuestion();
      state.examPreviewDone = false;
      state.questionFrozen = false;
      session.answerVisible = false;
      session.activeTfLetter = '';
      closeResultDialog();
      session.index = nextIndex;
      renderCurrentBoard();
      renderRegularTestPresenter();
      showLoginStatus(`Đang xem câu ${nextIndex + 1}/${total}.${regularTestQuestionSaved(nextIndex) ? ' Câu này đã quét.' : ' Câu này chưa quét.'}`, 'ok');
    }

    async function saveRegularTestQuestionRecord(correctValue = '') {
      if (!isRegularTestSessionActive()) throw new Error('Chưa có phiên kiểm tra.');
      const mon = normMonKey(state.currentMon || '');
      if (!mon) throw new Error('Chưa chọn Lớp-Môn.');
      const session = state.regularTestSession;
      const index = parseInt(String(session.index || 0), 10) || 0;
      const questionIndex = index + 1;
      const sessionUid = String(session.uid || '').trim();
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const tfSub = regularTestGroupedTfSlide(slide) ? regularTestActiveTfLetter(slide) : '';
      if (regularTestGroupedTfSlide(slide) && !tfSub) throw new Error('Bạn bấm Quét ở đầu một ý a/b/c/d trước.');
      const correct = normalizeScanAnswerToken(correctValue || regularTestAnswerToken() || session.answers[index] || '') || 'A';
      const scoreItem = currentRegularTestScoreItem();
      const answers = {};
      let answered = 0;
      let correctCnt = 0;
      Object.keys(state.currentStudents || {}).forEach((so) => {
        const live = state.currentLiveAnswers[so] || null;
        const ans = String((live && live.ans) || '').toUpperCase();
        if (['A','B','C','D'].includes(ans)) {
          answers[String(so)] = ans;
          answered += 1;
          if (scoreItem
            ? isCorrectAnswerForScoreItem(ans, correct, scoreItem)
            : ans === correct) correctCnt += 1;
        }
      });
      if (!answered) throw new Error('Chưa có học sinh trả lời.');

      const hist = Array.isArray(state.scanHistory[mon]) ? [...state.scanHistory[mon]] : [];
      const existingIndex = hist.findIndex((item) => {
        if (String(item && item.mode || '') !== 'regular_test') return false;
        if (String(item && item.regular_test_uid || '').trim() !== sessionUid) return false;
        if (Number(item && item.regular_test_question_index || 0) !== questionIndex) return false;
        return String(item && item.regular_test_sub || '').trim().toLowerCase() === tfSub;
      });

      // Số câu trong báo cáo luôn tiếp nối theo thứ tự lưu thực tế: ... 63, 64, 65,
      // không phụ thuộc giáo viên đang mở câu số mấy trong bộ câu hỏi.
      const normalQuestionCount = hist.reduce((count, item) => count + (isMultiCodeRecord(item) ? 0 : 1), 0);
      const existingQuestionNo = existingIndex >= 0
        ? (parseInt(String(hist[existingIndex] && hist[existingIndex].q || 0), 10) || 0)
        : 0;
      const qNo = existingQuestionNo > 0 ? existingQuestionNo : normalQuestionCount + 1;

      const tsIso = new Date().toISOString().slice(0, 19);
      const record = {
        q: qNo,
        ts: tsIso,
        date: tsIso.split('T')[0],
        correct,
        answered,
        correct_cnt: correctCnt,
        answers,
        mode: 'regular_test',
        regular_test_uid: sessionUid,
        regular_test_question_index: questionIndex,
        regular_test_sub: tfSub,
        q_label: tfSub ? `${String(slide && (slide.displayNumber || slide.label) || questionIndex)}${tfSub}` : String(slide && (slide.displayNumber || slide.label) || questionIndex),
      };
      if (existingIndex >= 0) hist[existingIndex] = record;
      else hist.push(record);
      state.scanHistory[mon] = hist;
      await apiPut('/api/scan-history', { data: state.scanHistory });
      clearCurrentQuestion();
      if (!session.savedQuestions || typeof session.savedQuestions !== 'object') session.savedQuestions = {};
      if (tfSub && slide) {
        if (!slide.scanSavedMarks || typeof slide.scanSavedMarks !== 'object') slide.scanSavedMarks = {};
        if (!slide.scanClosedItems || typeof slide.scanClosedItems !== 'object') slide.scanClosedItems = {};
        slide.scanSavedMarks[tfSub] = regularTestExpectedTfMark(slide, tfSub, regularTestTfLetterIndex(slide, tfSub));
        slide.scanClosedItems[tfSub] = true;
        session.savedQuestions[`${questionIndex}${tfSub}`] = qNo;
      } else {
        session.savedQuestions[String(questionIndex)] = qNo;
      }
      regularTestDiscardQuestionImage(index);
      state.selectedHistoryIndex = existingIndex >= 0 ? existingIndex : hist.length - 1;
      renderAll();
      renderDetail(hist[state.selectedHistoryIndex]);
      showLoginStatus(`Đã lưu ${tfSub ? `Câu ${String(slide && (slide.displayNumber || slide.label) || questionIndex)}${tfSub}` : 'câu đang xem'} vào Câu ${formatQuestionNumber(qNo)} của ${mon}.`, 'ok');
      return { qNo, questionIndex, updated: existingIndex >= 0 };
    }

    function beginRegularTestRepick(pending) {
      if (!pending || !pending.regularTest || !isRegularTestSessionActive()
        || pending.regularTestUid !== state.regularTestSession.uid
        || pending.regularQuestionIndex !== state.regularTestSession.index
        || pending.scanMon !== state.currentMon || !answeredStats().answered) return false;
      state.regularTestRepickPending = Object.assign({}, pending);
      if (pending.regularTfSub) state.regularTestSession.activeTfLetter = String(pending.regularTfSub || '').trim().toLowerCase();
      closeResultDialog();
      state.selectedCorrect = '';
      state.revealAnswers = true;
      state.questionFrozen = true;
      state.regularTestSession.answerVisible = false;
      renderCurrentBoard();
      return true;
    }

    function previewRegularTestQuestion(correctOverride = '') {
      if (!isRegularTestSessionActive()) throw new Error('Chưa có phiên kiểm tra.');
      const session = state.regularTestSession;
      const index = parseInt(String(session.index || 0), 10) || 0;
      if (index >= session.slides.length) throw new Error('Đã hoàn thành bài kiểm tra.');
      const stats = answeredStats();
      if (!stats.answered) throw new Error('Chưa có học sinh nào trả lời câu này.');
      const scoreItem = currentRegularTestScoreItem();
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const tfSub = regularTestGroupedTfSlide(slide) ? regularTestActiveTfLetter(slide) : '';
      if (regularTestGroupedTfSlide(slide) && !tfSub) throw new Error('Bạn bấm Quét ở đầu một ý a/b/c/d trước.');
      const picked = normalizeScanAnswerToken(correctOverride);
      const correct = picked
        ? (scoreItem && scoreItem.type === 'true_false' ? (picked === 'D' ? 'D' : 'A') : picked)
        : (regularTestAnswerToken() || normalizeScanAnswerToken(session.answers[index] || '') || 'A');
      const correctCnt = Object.values(state.currentLiveAnswers || {}).reduce((sum, row) => {
        const ans = String(row && row.ans || '').trim().toUpperCase();
        return sum + (scoreItem
          ? (isCorrectAnswerForScoreItem(ans, correct, scoreItem) ? 1 : 0)
          : (ans === correct ? 1 : 0));
      }, 0);
      state.revealAnswers = true;
      state.regularTestRepickPending = null;
      state.selectedCorrect = correct;
      state.examPreviewDone = true;
      state.questionFrozen = true;
      session.answerVisible = true;
      renderCurrentBoard();
      showResultDialog(correct, correctCnt, stats.answered, {
        regularTest: true, allowRepick: true,
        regularTestUid: session.uid, regularQuestionIndex: index, regularTfSub: tfSub, scanMon: state.currentMon,
        correctLabel: scoreItem && scoreItem.type === 'true_false' ? trueFalseCardDisplayValue(correct) : correct
      });
      showLoginStatus(`Đã xem kết quả ${tfSub ? `Câu ${String(slide && (slide.displayNumber || slide.label) || index + 1)}${tfSub}` : `câu ${index + 1}`}. Bấm Lưu để ghi vào Kết quả thường xuyên.`, 'ok');
    }

    async function saveAndAdvanceRegularTestQuestion(correctValue = '') {
      if (!isRegularTestSessionActive()) throw new Error('Chưa có phiên kiểm tra.');
      const session = state.regularTestSession;
      const index = parseInt(String(session.index || 0), 10) || 0;
      if (index >= session.slides.length) return;
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const groupedTf = regularTestGroupedTfSlide(slide);
      const savedSub = groupedTf ? regularTestActiveTfLetter(slide) : '';
      await saveRegularTestQuestionRecord(correctValue);
      const tfFinished = groupedTf && regularTestTfAllFinished(slide);
      session.index = groupedTf && !tfFinished ? index : index + 1;
      session.activeTfLetter = '';
      session.answerVisible = false;
      state.examPreviewDone = false;
      state.questionFrozen = false;
      state.revealAnswers = false;
      state.selectedCorrect = '';
      closeResultDialog();
      renderCurrentBoard();
      renderRegularTestPresenter();
      if (groupedTf && !tfFinished) {
        showLoginStatus(`Đã lưu Câu ${String(slide && (slide.displayNumber || slide.label) || index + 1)}${savedSub}. Bấm Quét ở ý tiếp theo.`, 'ok');
      } else if (session.index >= session.slides.length) {
        showLoginStatus(`Đã hoàn thành ${session.slides.length} câu kiểm tra thường xuyên. Kết quả đã lưu trong mục Kết quả thường xuyên.`, 'ok');
      } else {
        showLoginStatus(`Đã lưu câu ${index + 1}; chuyển sang câu ${session.index + 1}.`, 'ok');
      }
    }

    async function nextRegularTestQuestion() {
      if (!isRegularTestSessionActive()) throw new Error('Chưa có phiên kiểm tra.');
      const stats = answeredStats();
      if (!stats.answered) throw new Error('Chưa có học sinh nào trả lời câu hiện tại.');
      const index = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
      const correct = regularTestAnswerToken() || normalizeScanAnswerToken(state.regularTestSession.answers[index] || '') || 'A';
      await saveAndAdvanceRegularTestQuestion(correct);
    }

    function cancelAndAdvanceRegularTestQuestion() {
      if (!isRegularTestSessionActive()) return;
      const session = state.regularTestSession;
      const index = parseInt(String(session.index || 0), 10) || 0;
      const slide = Array.isArray(session.slides) ? session.slides[index] : null;
      const groupedTf = regularTestGroupedTfSlide(slide);
      const tfSub = groupedTf ? regularTestActiveTfLetter(slide) : '';
      clearCurrentQuestion();
      if (groupedTf && tfSub) {
        if (!slide.scanClosedItems || typeof slide.scanClosedItems !== 'object') slide.scanClosedItems = {};
        slide.scanClosedItems[tfSub] = true;
        session.activeTfLetter = '';
        if (regularTestTfAllFinished(slide)) session.index = Math.min(session.slides.length, index + 1);
      } else {
        session.index = Math.min(session.slides.length, index + 1);
      }
      session.answerVisible = false;
      closeResultDialog();
      renderCurrentBoard();
      renderRegularTestPresenter();
      showLoginStatus(groupedTf && tfSub
        ? `Đã đóng Câu ${String(slide && (slide.displayNumber || slide.label) || index + 1)}${tfSub}.`
        : `Đã bỏ qua câu ${index + 1}${session.index < session.slides.length ? `; chuyển sang câu ${session.index + 1}.` : '. Bài kiểm tra đã kết thúc.'}`, 'ok');
    }

    function updateLiveScanCounters() {
      const stats = answeredStats();
      [
        [els.sumAnswered, stats.answered], [els.sumA, stats.ca],
        [els.sumB, stats.cb], [els.sumC, stats.cc], [els.sumD, stats.cd],
        [els.liveCount, stats.answered], [els.heroLiveCount, stats.answered]
      ].forEach(([element, value]) => {
        if (element && element.textContent !== String(value)) element.textContent = String(value);
      });
      updateRevealButtons(stats.answered);
      updateAutoFinishButton(stats.answered);
    }

    function renderCurrentBoard(options = {}) {
      liveScanStudentRows.clear();
      const keys = sortedStudentKeys();
      const examCfg = currentExamConfig();
      const hasExamCfg = examConfigsForMon(state.currentMon).length > 0;
      const wordPresentationMode = typeof window.wordPresentationIsOpen === 'function' && window.wordPresentationIsOpen();
      const powerPointPresentationMode = wordPresentationMode
        && typeof window.wordPresentationIsPowerPoint === 'function'
        && window.wordPresentationIsPowerPoint();
      const questionWordPresentationMode = wordPresentationMode && !powerPointPresentationMode;
      /* Trong Trình chiếu Word, mỗi học sinh được chấm trực tiếp theo phương án
         A/B/C/D giơ trên thẻ của câu Word hiện tại, không dùng mã đề cũ.
         PowerPoint không có đáp án câu hỏi riêng nên vẫn cho phép Chấm theo mã đề. */
      const autoMode = (!wordPresentationMode || powerPointPresentationMode) && isAutoExamMode();
      const wordScoreItem = questionWordPresentationMode && typeof window.wordPresentationCurrentScoreItem === 'function'
        ? window.wordPresentationCurrentScoreItem()
        : null;
      const regularTestScoreItem = !wordPresentationMode && isRegularTestSessionActive()
        ? currentRegularTestScoreItem()
        : null;
      const manualScoreItem = wordScoreItem || regularTestScoreItem;
      const hideExamCodes = autoMode && !!state.hideExamCodeValues;
      const qNo = currentQuestionNo();
      refreshExamModeToggle();
      refreshExamModeExtraControls();
      if (questionWordPresentationMode) document.body.classList.remove('exam-mode-expanded');
      else syncExamModeExpanded();
      if (!state.currentMon) {
        els.currentBoardSub.textContent = state.username ? `Tài khoản ${state.username} · Hãy chọn Lớp-Môn để xem dữ liệu.` : 'Đăng nhập và chọn Lớp-Môn để xem dữ liệu.';
      } else if (isRegularTestSessionActive() && state.examPreviewDone) {
        const index = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
        const sourceLabel = String(state.regularTestSession && state.regularTestSession.title || 'Kiểm tra ngay');
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · ${sourceLabel} · Câu ${index + 1}/${state.regularTestSession.slides.length}. Đã bấm Kết quả quét: đáp án của học sinh hiện sau tên. Bấm Lưu để ghi vào Kết quả thường xuyên.`;
      } else if (isRegularTestSessionActive()) {
        const index = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
        const sourceLabel = String(state.regularTestSession && state.regularTestSession.title || 'Kiểm tra ngay');
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · ${sourceLabel} · Câu ${index + 1}/${state.regularTestSession.slides.length}. Học sinh giơ thẻ, giáo viên quét rồi bấm Kết quả quét.`;
      } else if (questionWordPresentationMode && state.revealAnswers && state.selectedCorrect) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Trình chiếu Word · Đáp án đúng ${state.selectedCorrect}. Phương án giơ trên thẻ đang hiện sau tên học sinh: đúng màu xanh lá, sai màu đỏ.`;
      } else if (questionWordPresentationMode) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Trình chiếu Word. Học sinh giơ thẻ A/B/C/D; giáo viên bấm Kết quả quét để chấm câu hiện tại.`;
      } else if (autoMode && state.examPreviewDone) {
        const currentScanLabel = scanQuestionLabelFromConfig(examCfg, qNo);
        const qText = qNo <= examCfg.questionCount ? `Câu hiện tại: ${currentScanLabel}/${formatQuestionNumber(examCfg.questionCount, true)}` : `Đã hết ${formatQuestionNumber(examCfg.questionCount, true)}/${formatQuestionNumber(examCfg.questionCount, true)} câu cấu hình`;
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · ${examConfigLabelByNo(state.currentMon, currentExamSerial(state.currentMon)) || `Đề số ${currentExamSerial(state.currentMon)}`} · ${qText}. Đã bấm "Xem": phương án học sinh hiện ngay sau mã đề, đúng màu xanh lá, sai màu đỏ. Bấm nút mũi tên → để lưu và sang câu tiếp, hoặc bấm "Hủy/quét lại" để bỏ kết quả câu này và quét lại.`;
      } else if (autoMode) {
        const currentScanLabel = scanQuestionLabelFromConfig(examCfg, qNo);
        const qText = qNo <= examCfg.questionCount ? `Câu hiện tại: ${currentScanLabel}/${formatQuestionNumber(examCfg.questionCount, true)}` : `Đã hết ${formatQuestionNumber(examCfg.questionCount, true)}/${formatQuestionNumber(examCfg.questionCount, true)} câu cấu hình`;
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · ${examConfigLabelByNo(state.currentMon, currentExamSerial(state.currentMon)) || `Đề số ${currentExamSerial(state.currentMon)}`} (${examCfg.codeOrder.length} mã đề). ${qText}. Bấm "Xem" để hiện đúng/sai, bấm nút mũi tên → để lưu kết quả, hoặc bấm "Hủy/quét lại" để xóa lượt quét hiện tại và quét lại.`;
      } else if (powerPointPresentationMode && state.revealAnswers && state.selectedCorrect) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Trình chiếu PowerPoint · Đáp án đúng ${state.selectedCorrect}. Phương án giơ trên thẻ đang hiện sau tên học sinh: đúng màu xanh lá, sai màu đỏ.`;
      } else if (powerPointPresentationMode) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Trình chiếu PowerPoint. Học sinh giơ thẻ A/B/C/D; sau thẻ hợp lệ đầu tiên, bảng học sinh sẽ phủ lên màn hình theo 5 cột để cả lớp dễ quan sát.`;
      } else if (state.revealAnswers && state.selectedCorrect) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Đã chốt đáp án đúng ${state.selectedCorrect}, phương án của từng học sinh đang hiện ngay sau tên: đúng màu xanh lá, sai màu đỏ.`;
      } else if (hasExamCfg) {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Học sinh đã quét sẽ bôi xanh. Bấm nút "Chấm theo mã đề" nếu muốn dùng nút mũi tên →, còn không thì chấm thủ công bằng A/B/C/D.`;
      } else {
        els.currentBoardSub.textContent = `Tài khoản ${state.username || '-'} · ${state.currentMon} · Học sinh đã quét sẽ bôi xanh. Mỗi ID chỉ nhận 1 lần cho đến khi bạn chốt A/B/C/D.`;
      }

      updateLiveScanCounters();

      if (!keys.length) {
        els.studentColumns.innerHTML = '';
        els.studentEmpty.style.display = 'block';
        els.studentEmpty.textContent = state.currentMon ? 'Lớp-Môn này chưa có danh sách học sinh.' : 'Chưa có dữ liệu để hiển thị.';
        return;
      }

      const effectiveColumnCount = autoMode
        ? ([4, 5, 6].includes(Number(state.examColumnCount)) ? Number(state.examColumnCount) : 5)
        : state.columnCount;
      const cols = splitIntoColumns(keys, effectiveColumnCount);
      els.studentBoard.style.setProperty('--student-font-size', `${state.fontSize}px`);
      els.studentColumns.style.setProperty('--student-grid-columns', String(Math.max(1, cols.length)));
      els.studentColumns.style.gridTemplateColumns = `repeat(${Math.max(1, cols.length)}, minmax(0, 1fr))`;

      const html = cols.map((col) => {
        if (autoMode) {
          const rows = col.map((so) => {
            const fullName = state.currentStudents[so] || '';
            const shortName = state.currentShortNames[so] || fullName || 'Chưa có tên';
            const dropped = !!(state.currentDroppedStudents && state.currentDroppedStudents[so]);
            const live = dropped ? null : (state.currentLiveAnswers[so] || null);
            const ans = live ? String(live.ans || '').toUpperCase() : '';
            const scanned = !!live && ['A', 'B', 'C', 'D'].includes(ans);
            const autoRevealed = scanned && state.examPreviewDone;
            const expectedAuto = autoRevealed ? expectedAnswerForStudentFromConfig(examCfg, so, qNo) : '';
            const scoreItem = autoRevealed ? scoreItemForLiveExam(examCfg, so, qNo) : null;
            const isCorrect = autoRevealed && !!expectedAuto && isCorrectAnswerForScoreItem(ans, expectedAuto, scoreItem);
            const isWrong = autoRevealed && !!expectedAuto && !isCorrect;
            const lineClass = `student-table-row${scanned ? ' scanned' : ''}${isCorrect ? ' correct' : ''}${dropped ? ' dropped' : ''}`;
            const codeLabel = studentCodeForConfig(examCfg, so);
            const studentScanLabel = scanQuestionLabelForStudentFromConfig(examCfg, so, qNo);
            const displayCodeLabel = dropped
              ? 'Bỏ học'
              : (hideExamCodes
                ? (state.examPreviewDone ? '' : studentScanLabel)
                : codeLabel);
            const displayAns = autoRevealed ? displayAnswerForLiveExam(examCfg, so, qNo, ans) : '';
            const answerDisplay = autoRevealed ? `${studentScanLabel}${displayAns}` : '';
            const answerSuffix = autoRevealed
              ? `<span class="student-answer-suffix ${isCorrect ? 'correct' : (isWrong ? 'wrong' : '')}">${escapeHtml(answerDisplay)}</span>`
              : '';
            return `
              <div class="${lineClass}" data-scan-student="${escapeHtml(so)}" title="${escapeHtml(`${so} - ${fullName}${dropped ? ' (Bỏ học)' : ''}`.trim())}">
                <div class="student-cell-id">${escapeHtml(String(so))}</div>
                <div class="student-cell-name">${escapeHtml(shortName)}</div>
                <div class="student-cell-code">${escapeHtml(displayCodeLabel || '')}${answerSuffix}</div>
              </div>`;
          }).join('');
          const examThirdHeader = (state.examPreviewDone || hideExamCodes) ? 'Câu/P.án' : 'M.Đề';
          return `
            <div class="student-column">
              <div class="student-table-head">
                <div>ID</div>
                <div>Tên</div>
                <div>${examThirdHeader}</div>
              </div>
              ${rows}
            </div>`;
        }

        const rows = col.map((so) => {
          const fullName = state.currentStudents[so] || '';
          const shortName = state.currentShortNames[so] || fullName || 'Chưa có tên';
          const dropped = !!(state.currentDroppedStudents && state.currentDroppedStudents[so]);
          const live = dropped ? null : (state.currentLiveAnswers[so] || null);
          const ans = live ? String(live.ans || '').toUpperCase() : '';
          const scanned = !!live && ['A', 'B', 'C', 'D'].includes(ans);
          const manualRevealed = scanned && state.revealAnswers && !!state.selectedCorrect;
          const autoRevealed = scanned && autoMode && state.examPreviewDone;
          const expectedAuto = autoRevealed ? expectedAnswerForStudentFromConfig(examCfg, so, qNo) : '';
          const autoScoreItem = autoRevealed ? scoreItemForLiveExam(examCfg, so, qNo) : null;
          const revealed = manualRevealed || autoRevealed;
          const isCorrect = manualRevealed
            ? (manualScoreItem
              ? isCorrectAnswerForScoreItem(ans, state.selectedCorrect, manualScoreItem)
              : ans === state.selectedCorrect)
            : (autoRevealed && !!expectedAuto && isCorrectAnswerForScoreItem(ans, expectedAuto, autoScoreItem));
          const isWrong = manualRevealed
            ? !isCorrect
            : (autoRevealed && !!expectedAuto && !isCorrect);
          const lineClass = `student-line${scanned ? ' scanned' : ''}${isCorrect ? ' correct' : ''}${dropped ? ' dropped' : ''}`;
          const codeLabel = autoMode ? studentCodeForConfig(examCfg, so) : '';
          const revealedAnswer = manualRevealed && manualScoreItem
            ? displayAnswerForScoreItem(ans, manualScoreItem)
            : ans;
          const answerSuffix = revealed
            ? `<span class="student-answer-suffix ${isCorrect ? 'correct' : (isWrong ? 'wrong' : '')}">${escapeHtml(revealedAnswer)}</span>`
            : '';
          const codeSuffix = codeLabel ? `<span class="student-code">${escapeHtml(codeLabel)}</span>` : '';
          const dropoutSuffix = dropped ? '<span class="student-dropout-badge">Bỏ học</span>' : '';
          return `
            <div class="${lineClass}" data-scan-student="${escapeHtml(so)}" title="${escapeHtml(`${so} - ${fullName}${dropped ? ' (Bỏ học)' : ''}`.trim())}">
              <div class="student-line-text"><span class="student-name">${escapeHtml(`${so}${shortName}`)}</span>${codeSuffix}${dropoutSuffix}${answerSuffix}</div>
            </div>`;
        }).join('');
        return `<div class="student-column">${rows}</div>`;
      }).join('');

      els.studentColumns.innerHTML = html;
      els.studentColumns.querySelectorAll('[data-scan-student]').forEach((row) => {
        liveScanStudentRows.set(row.dataset.scanStudent, row);
      });
      els.studentEmpty.style.display = 'none';
      if (isRegularTestSessionActive() && !options.scanOnly) renderRegularTestPresenter();
    }

    function renderHistory() {
      const hist = currentHistoryList();
      els.historyBody.innerHTML = '';
      if (!state.currentMon) {
        els.historySub.textContent = 'Chọn Lớp-Môn để mở lịch sử đã lưu.';
      } else {
        els.historySub.textContent = `Lịch sử đã lưu của ${state.currentMon}`;
      }
      if (!hist.length) {
        els.historyEmpty.style.display = 'block';
        els.savedCount.textContent = '0';
        els.heroSavedCount.textContent = '0';
        return;
      }
      const rows = hist.map((item, idx) => {
        const answered = Number(item.answered || Object.keys(item.answers || {}).length || 0);
        const correctCnt = Number(item.correct_cnt || 0);
        const pct = answered > 0 ? Math.round((correctCnt / answered) * 100) : 0;
        const activeClass = idx === state.selectedHistoryIndex ? 'active' : '';
        return `
          <tr class="${activeClass}" data-idx="${idx}">
            <td>${escapeHtml(isMultiCodeRecord(item) ? cleanScanQuestionLabel(item.q_label, formatQuestionNumber(item.q || idx + 1)) : formatQuestionNumber(item.q || idx + 1))}</td>
            <td>${escapeHtml(formatDateTime(item.ts || item.date || ''))}</td>
            <td>${escapeHtml(item.correct_label || item.correct || '-')}</td>
            <td>${answered}</td>
            <td>${pct}%</td>
          </tr>`;
      }).join('');
      els.historyBody.innerHTML = rows;
      els.historyEmpty.style.display = 'none';
      els.savedCount.textContent = String(hist.length);
      els.heroSavedCount.textContent = String(hist.length);

      els.historyBody.querySelectorAll('tr').forEach((tr) => {
        tr.addEventListener('click', () => {
          const idx = parseInt(tr.getAttribute('data-idx') || '-1', 10);
          state.selectedHistoryIndex = idx;
          renderHistory();
        });
      });
    }

    function renderDetail(item) {
      if (!els.detailEmpty || !els.detailWrap || !els.answerList || !els.detailMon || !els.detailQ || !els.detailCorrect || !els.detailRate) {
        return;
      }
      if (!item) {
        els.detailEmpty.style.display = 'block';
        els.detailWrap.style.display = 'none';
        els.answerList.innerHTML = '';
        return;
      }
      const answers = item.answers && typeof item.answers === 'object' ? item.answers : {};
      const correct = String(item.correct || '').toUpperCase();
      const studentKeys = sortedStudentKeys();
      const rows = [];
      studentKeys.forEach((so) => {
        const ansKey = resolveStudentKey(answers, so) || so;
        const ans = String(answers[ansKey] || '').toUpperCase();
        if (!ans) return;
        const expected = expectedAnswerForRecord(item, so);
        const code = codeForRecord(item, so);
        const cfg = isMultiCodeRecord(item) ? examConfigsForMon(state.currentMon).find((entry) => entry.examNo === recordExamNumber(item)) : null;
        const scoreItem = cfg ? scoreItemForExamRecord(cfg, item, so) : null;
        const displayAns = displayAnswerForScoreItem(ans, scoreItem);
        const displayExpected = displayAnswerForScoreItem(expected, scoreItem);
        const right = expected ? isCorrectAnswerForScoreItem(ans, expected, scoreItem) : ans === correct;
        const subText = code
          ? `Mã đề ${code} · Đáp án chuẩn ${displayExpected || '-'}`
          : (right ? 'Trả lời đúng' : 'Trả lời chưa đúng');
        rows.push(`
          <div class="answer-row ${right ? 'right' : 'wrong'}">
            <div class="answer-left">
              <strong>${escapeHtml(so)} - ${escapeHtml(state.currentStudents[so] || 'Chưa có tên')}</strong>
              <span>${escapeHtml(subText)}</span>
            </div>
            <div class="answer-right">${escapeHtml(displayAns)}</div>
          </div>`);
      });
      // Nếu history có học sinh nhưng roster hiện tại không có đủ, bổ sung thêm
      Object.keys(answers).forEach((so) => {
        if (studentKeys.some(k => resolveStudentKey({[k]:true}, so) === k)) return;
        const ans = String(answers[so] || '').toUpperCase();
        if (!ans) return;
        const expected = expectedAnswerForRecord(item, so);
        const code = codeForRecord(item, so);
        const cfg = isMultiCodeRecord(item) ? examConfigsForMon(state.currentMon).find((entry) => entry.examNo === recordExamNumber(item)) : null;
        const scoreItem = cfg ? scoreItemForExamRecord(cfg, item, so) : null;
        const displayAns = displayAnswerForScoreItem(ans, scoreItem);
        const displayExpected = displayAnswerForScoreItem(expected, scoreItem);
        const right = expected ? isCorrectAnswerForScoreItem(ans, expected, scoreItem) : ans === correct;
        const subText = code
          ? `Mã đề ${code} · Đáp án chuẩn ${displayExpected || '-'}`
          : (right ? 'Trả lời đúng' : 'Trả lời chưa đúng');
        rows.push(`
          <div class="answer-row ${right ? 'right' : 'wrong'}">
            <div class="answer-left">
              <strong>${escapeHtml(so)} - Học sinh không có trong roster hiện tại</strong>
              <span>${escapeHtml(subText)}</span>
            </div>
            <div class="answer-right">${escapeHtml(displayAns)}</div>
          </div>`);
      });

      const answered = Number(item.answered || Object.keys(answers).length || 0);
      const correctCnt = Number(item.correct_cnt || 0);
      const pct = answered > 0 ? Math.round((correctCnt / answered) * 100) : 0;
      els.detailMon.textContent = state.currentMon || '-';
      els.detailQ.textContent = isMultiCodeRecord(item) ? formatQuestionNumber(item.q || '-', true) : formatQuestionNumber(item.q || '-');
      els.detailCorrect.textContent = item.correct_label || correct || '-';
      els.detailRate.textContent = `${correctCnt}/${answered} = ${pct}%`;
      els.answerList.innerHTML = rows.length ? rows.join('') : '<div class="detail-empty">Câu này chưa có dữ liệu trả lời.</div>';
      els.detailEmpty.style.display = 'none';
      els.detailWrap.style.display = 'block';
    }

    function updateTopStats() {
      const classCount = Object.keys(state.classData || {}).length;
      const studentCount = sortedStudentKeys().length;
      const liveCount = Object.keys(state.currentLiveAnswers || {}).length;
      const savedCount = currentHistoryList().length;
      els.classCount.textContent = String(classCount);
      els.studentCount.textContent = String(studentCount);
      els.liveCount.textContent = String(liveCount);
      els.savedCount.textContent = String(savedCount);
      els.heroClassCount.textContent = String(classCount);
      els.heroStudentCount.textContent = String(studentCount);
      els.heroLiveCount.textContent = String(liveCount);
      els.heroSavedCount.textContent = String(savedCount);
    }

    function renderClassOptions() {
      const keys = Object.keys(state.classData || {}).map(normMonKey).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'));
      const options = ['<option value="">Chọn Lớp-Môn</option>'].concat(keys.map((key) => `<option value="${escapeHtml(key)}">${escapeHtml(key)}</option>`));
      els.classSubjectSelect.innerHTML = options.join('');
      els.compactClassSubjectSelect.innerHTML = options.join('');
      if (state.currentMon && keys.includes(state.currentMon)) {
        els.classSubjectSelect.value = state.currentMon;
        els.compactClassSubjectSelect.value = state.currentMon;
      } else {
        state.currentMon = '';
        els.classSubjectSelect.value = '';
        els.compactClassSubjectSelect.value = '';
      }
      if (typeof window.refreshWordPresentationClassOptions === 'function') {
        try { window.refreshWordPresentationClassOptions(); } catch (_) {}
      }
      try { refreshSingleExamClassOptions(); } catch (_) {}
    }

    function renderAll() {
      setAccountNote();
      renderClassOptions();
      if (state.currentMon && !state.currentStudents[Object.keys(state.currentStudents)[0]]) {
        buildCurrentRoster();
      }
      renderCurrentBoard();
      renderHistory();
      updateTopStats();
      updateRegularTestStartButton();
      applyEntitlementUi();
      if (isRegularTestSessionActive()) renderRegularTestPresenter();
    }

    async function loadAllData(keepCurrentMon = false) {
      if (!state.token) return;
      try {
        await refreshWebClassManagerAccess(false);
        const [classResp, historyResp] = await Promise.all([
          apiGet('/api/class-data'),
          apiGet('/api/scan-history')
        ]);
        const rawClassData = (classResp && typeof classResp.data === 'object') ? classResp.data : {};
        const rawHistory = (historyResp && typeof historyResp.data === 'object') ? historyResp.data : {};

        state.classData = {};
        let classDataNeedsPhoneSafeRepack = false;
        Object.keys(rawClassData).forEach((k) => {
          const monKey = normMonKey(k);
          const entry = (rawClassData[k] && typeof rawClassData[k] === 'object') ? rawClassData[k] : {};
          const students = (entry.students && typeof entry.students === 'object') ? entry.students : {};
          if ((entry.examConfigs && typeof entry.examConfigs !== 'string') || (entry.examConfig && typeof entry.examConfig !== 'string')) {
            classDataNeedsPhoneSafeRepack = true;
          }
          if (entry.droppedStudents != null && typeof entry.droppedStudents !== 'string') {
            classDataNeedsPhoneSafeRepack = true;
          }
          const cleanStudents = cleanStudentsForPhone(students);
          if (!Object.keys(cleanStudents).length && !(Array.isArray(entry.items) && entry.items.length === 0)) {
            classDataNeedsPhoneSafeRepack = true;
          }
          const droppedStudents = normalizeDroppedStudents(entry.droppedStudents, students);
          const normalizedConfigs = normalizeExamConfigCollection(entry.examConfigs, entry.examConfig, students);
          const maxExamNo = normalizedConfigs.reduce((max, cfg) => Math.max(max, parseInt(String(cfg.examNo || 0), 10) || 0), 0);
          state.classData[monKey] = {
            ...entry,
            students,
            droppedStudents,
            examConfigs: normalizedConfigs,
            examConfig: normalizedConfigs.length ? normalizedConfigs[normalizedConfigs.length - 1] : normalizeStoredExamConfig(entry.examConfig, students),
            examConfigSaveCount: Math.max(examConfigSaveCount(entry), maxExamNo)
          };
        });
        state.scanHistory = {};
        Object.keys(rawHistory).forEach((k) => {
          state.scanHistory[normMonKey(k)] = Array.isArray(rawHistory[k]) ? rawHistory[k] : [];
        });

        if (classDataNeedsPhoneSafeRepack) {
          try {
            await apiPut('/api/class-data', { data: buildPhoneSafeClassDataForSave(state.classData) });
          } catch (err) {
            console.warn('Không thể tự đóng gói lại dữ liệu lớp-môn cho app điện thoại:', err);
          }
        }

        const keys = Object.keys(state.classData);
        if (!keepCurrentMon || !state.currentMon || !state.classData[state.currentMon]) {
          state.currentMon = '';
        }
        buildCurrentRoster();
        setAccountNote();
        renderAll();
      } catch (error) {
        showLoginStatus('Nạp dữ liệu không thành công: ' + error.message, 'err');
        if (/401|403|token|đăng nhập|phiên/i.test(error.message || '')) {
          doLogout(false);
        }
      }
    }

    function restoreFromStorage() {
      try {
        renderSavedAccountSelect();
        const raw = localStorage.getItem(STORAGE_KEY);
        const obj = raw ? JSON.parse(raw) : null;
        const savedUsername = String((obj && obj.username) || '');
        const savedPassword = String((obj && obj.password) || '');

        if (savedUsername) {
          if (els.username) els.username.value = savedUsername;
          if (els.password) els.password.value = savedPassword;
          state.password = savedPassword;
          renderSavedAccountSelect(savedUsername);
        } else if (els.savedAccountSelect && els.savedAccountSelect.value) {
          applySavedAccountToInputs(els.savedAccountSelect.value, true);
        }

        if (obj && obj.token && savedUsername) {
          state.token = String(obj.token || '');
          state.username = savedUsername;
          setAuthUi(true);
          showLoginStatus('Đã khôi phục phiên đăng nhập cũ. Hệ thống đang nạp dữ liệu...', 'info');
          refreshSessionInfo().catch(() => null);
          loadAllData(true).then(() => connectRealtime(true));
        }
      } catch (_) {}
    }

    function updateCompactView() {
      const compact = window.innerWidth <= 760;
      const desktopFixed = window.innerWidth >= 1100;
      document.body.classList.toggle('compact-view', compact);
      document.body.classList.toggle('desktop-fixed-right', !compact && desktopFixed);
      syncExamModeExpanded();
      if (compact) {
        if (!state.userAdjustedFont) {
          state.fontSize = 22;
          els.fontSizeSelect.value = '22';
          if (els.examFontSizeSelect) els.examFontSizeSelect.value = '22';
        }
        state.columnCount = 3;
        if (els.columnCountSelect) els.columnCountSelect.value = '3';
      }
      if (state.currentStudents && Object.keys(state.currentStudents).length) {
        renderCurrentBoard();
      }
      if (isRegularTestSessionActive()) renderRegularTestPresenter();
    }

    function closeActionMenu() {
      if (els.actionMenuWrap) els.actionMenuWrap.classList.remove('open');
      if (els.actionMenuBtn) els.actionMenuBtn.setAttribute('aria-expanded', 'false');
    }

    function toggleActionMenu() {
      if (!els.actionMenuWrap || !els.actionMenuBtn || els.actionMenuBtn.disabled) return;
      const willOpen = !els.actionMenuWrap.classList.contains('open');
      closeActionMenu();
      if (willOpen) {
        els.actionMenuWrap.classList.add('open');
        els.actionMenuBtn.setAttribute('aria-expanded', 'true');
      }
    }

    let actionMenuAccessRefreshInFlight = false;

    async function toggleActionMenuWithFreshAccess() {
      if (!els.actionMenuWrap || !els.actionMenuBtn) return;

      // Khách vẫn nhìn thấy Menu ở trạng thái sáng; bấm vào thì hiện ngay
      // bảng Đăng nhập lớn, không mở menu và không gọi API quyền Quản lí.
      if (!state.token || isGuestAccount()) {
        closeActionMenu();
        guardLoginRequired();
        return;
      }

      // Bấm lần nữa khi menu đang mở thì chỉ đóng menu, không gọi server.
      if (els.actionMenuWrap.classList.contains('open')) {
        closeActionMenu();
        return;
      }
      if (actionMenuAccessRefreshInFlight) return;

      actionMenuAccessRefreshInFlight = true;
      closeActionMenu();
      const originalLabel = els.actionMenuBtn.textContent || 'Menu ▾';
      els.actionMenuBtn.disabled = false;
      els.actionMenuBtn.textContent = 'Đang cập nhật...';
      els.actionMenuBtn.setAttribute('aria-busy', 'true');

      try {
        // Chỉ kiểm tra lại quyền Quản lí thay vì tải lại toàn bộ trang.
        await refreshWebClassManagerAccess(false);
      } finally {
        actionMenuAccessRefreshInFlight = false;
        els.actionMenuBtn.textContent = originalLabel;
        els.actionMenuBtn.removeAttribute('aria-busy');
        els.actionMenuBtn.disabled = false;
      }

      if (!state.token) return;
      els.actionMenuWrap.classList.add('open');
      els.actionMenuBtn.setAttribute('aria-expanded', 'true');
    }

    function bindEvents() {
      els.loginForm.addEventListener('submit', doLogin);
      if (els.subscriptionCloseBtn) els.subscriptionCloseBtn.addEventListener('click', closeSubscriptionModal);
      if (els.subscriptionModal) els.subscriptionModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-subscription-close') === '1') closeSubscriptionModal();
      });
      if (els.subscriptionCopyContentBtn) els.subscriptionCopyContentBtn.addEventListener('click', copySubscriptionContent);
      if (els.savedAccountSelect) els.savedAccountSelect.addEventListener('change', () => {
        const username = String(els.savedAccountSelect.value || '').trim();
        if (!username) return;
        applySavedAccountToInputs(username);
      });
      if (els.savedAccountToggle) {
        // Chặn mousedown làm mất trạng thái trước khi click; menu chỉ đóng khi
        // người dùng chọn tài khoản, bấm lại nút, nhấn Escape hoặc bấm ra ngoài.
        els.savedAccountToggle.addEventListener('pointerdown', (event) => {
          if (event.button !== 0) return;
          event.preventDefault();
          event.stopPropagation();
        });
        els.savedAccountToggle.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          const isOpen = !!(els.savedAccountMenu && !els.savedAccountMenu.hidden);
          renderSavedAccountMenu(readSavedAccounts(), String((els.username && els.username.value) || '').trim());
          setSavedAccountMenuOpen(!isOpen);
        });
      }
      if (els.savedAccountMenu) {
        els.savedAccountMenu.addEventListener('pointerdown', (event) => {
          if (event.button !== 0) return;
          event.preventDefault();
          event.stopPropagation();
        });
        els.savedAccountMenu.addEventListener('click', (event) => {
          event.stopPropagation();
          const option = event.target instanceof Element ? event.target.closest('.saved-account-option') : null;
          if (!(option instanceof HTMLElement)) return;
          const username = String(option.dataset.username || '').trim();
          if (!username) return;
          applySavedAccountToInputs(username);
          if (els.username) els.username.focus();
        });
      }
      if (els.username) {
        els.username.addEventListener('input', () => {
          const value = String(els.username.value || '').trim();
          const account = getSavedAccount(value);
          if (els.savedAccountSelect) els.savedAccountSelect.value = account ? account.username : '';
          renderSavedAccountMenu(readSavedAccounts(), value);
        });
        els.username.addEventListener('keydown', (event) => {
          if (event.key === 'ArrowDown' && readSavedAccounts().length) {
            event.preventDefault();
            renderSavedAccountMenu(readSavedAccounts(), String(els.username.value || '').trim());
            setSavedAccountMenuOpen(true);
          } else if (event.key === 'Escape') {
            closeSavedAccountMenu();
          }
        });
      }
      document.addEventListener('pointerdown', (event) => {
        if (!els.savedAccountCombo || els.savedAccountCombo.contains(event.target)) return;
        closeSavedAccountMenu();
      });
      if (els.forgotPasswordBtn) els.forgotPasswordBtn.addEventListener('click', forgotPassword);
      if (els.subscriptionOpenBtn) els.subscriptionOpenBtn.addEventListener('click', openSubscriptionModal);
      if (els.limitedMainUpgradeBtn) els.limitedMainUpgradeBtn.addEventListener('click', openSubscriptionModal);

      const guardGuestClassSubjectControl = (event) => {
        if (!isGuestAccount()) return false;
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        guardLoginRequired();
        return true;
      };
      [els.classSubjectSelect, els.compactClassSubjectSelect].forEach((select) => {
        if (!select) return;
        select.addEventListener('pointerdown', (event) => { guardGuestClassSubjectControl(event); });
        select.addEventListener('keydown', (event) => {
          if (!['Enter', ' ', 'ArrowDown', 'ArrowUp'].includes(event.key)) return;
          guardGuestClassSubjectControl(event);
        });
      });

      els.classSubjectSelect.addEventListener('change', () => {
        if (isGuestAccount()) { els.classSubjectSelect.value = ''; guardLoginRequired(); return; }
        state.currentMon = normMonKey(els.classSubjectSelect.value || '');
        buildCurrentRoster();
        setAccountNote();
        renderAll();
      });
      els.compactClassSubjectSelect.addEventListener('change', () => {
        if (isGuestAccount()) { els.compactClassSubjectSelect.value = ''; guardLoginRequired(); return; }
        state.currentMon = normMonKey(els.compactClassSubjectSelect.value || '');
        els.classSubjectSelect.value = state.currentMon;
        buildCurrentRoster();
        setAccountNote();
        renderAll();
      });
      if (els.compactMenuSelect) els.compactMenuSelect.addEventListener('change', () => {
        const v = els.compactMenuSelect.value || '';
        if (v === 'refresh') els.refreshBtn.click();
        if (v === 'history') {
          document.querySelector('.history-board')?.scrollIntoView({ behavior: 'smooth', block: 'start' });
        }
        if (v === 'hide' && els.hideRevealBtn) els.hideRevealBtn.click();
        if (v === 'logout') els.logoutBtn.click();
        els.compactMenuSelect.value = '';
      });
      if (els.viewResultsBtn) els.viewResultsBtn.addEventListener('click', () => openReportModal());
      if (els.topViewResultsBtn) els.topViewResultsBtn.addEventListener('click', () => openReportModal());
      if (els.actionMenuBtn) els.actionMenuBtn.addEventListener('click', async (event) => {
        event.preventDefault();
        event.stopPropagation();
        await toggleActionMenuWithFreshAccess();
      });
      if (els.menuResultsBtn) els.menuResultsBtn.addEventListener('click', () => {
        closeActionMenu();
        openReportModal();
      });
      if (els.menuClassManagerBtn) els.menuClassManagerBtn.addEventListener('click', () => {
        closeActionMenu();
        openClassManagerModal();
      });
      document.addEventListener('click', (event) => {
        if (els.actionMenuWrap && !els.actionMenuWrap.contains(event.target)) closeActionMenu();
      });
      if (els.reportModeQuestion) els.reportModeQuestion.addEventListener('change', updateReportFilterUi);
      if (els.reportModeTime) els.reportModeTime.addEventListener('change', updateReportFilterUi);
      const handleReportDatasetChange = () => {
        refreshReportExamOptions();
        syncReportInputsForDataset();
        updateReportFilterUi();
        if (els.reportModal && !els.reportModal.hidden) {
          try {
            buildReportPreviewFromForm();
          } catch (error) {
            renderReportPlaceholder(escapeHtml(error.message || 'Không thể tạo báo cáo.'));
          }
        }
      };
      if (els.reportDatasetNormal) els.reportDatasetNormal.addEventListener('change', handleReportDatasetChange);
      if (els.reportDatasetExam) els.reportDatasetExam.addEventListener('change', handleReportDatasetChange);
      if (els.reportExamNo) els.reportExamNo.addEventListener('change', () => {
        syncReportInputsForDataset();
        if (els.reportModal && !els.reportModal.hidden) {
          try {
            buildReportPreviewFromForm();
          } catch (error) {
            renderReportPlaceholder(escapeHtml(error.message || 'Không thể tạo báo cáo.'));
          }
        }
      });
      if (els.reportGenerateBtn) els.reportGenerateBtn.addEventListener('click', () => {
        try {
          buildReportPreviewFromForm();
        } catch (error) {
          renderReportPlaceholder(escapeHtml(error.message || 'Không thể tạo báo cáo.'));
        }
      });
      if (els.reportExportBtn) els.reportExportBtn.addEventListener('click', exportCurrentReportToExcel);
      if (els.reportCloseBtn) els.reportCloseBtn.addEventListener('click', closeReportModal);
      if (els.reportModal) {
        els.reportModal.addEventListener('click', (event) => {
          if (event.target && event.target.getAttribute('data-report-close') === '1') closeReportModal();
        });
      }
      document.addEventListener('click', (event) => {
        const target = event.target && event.target.closest ? event.target.closest('#menuResultsBtn') : null;
        if (!target) return;
        event.preventDefault();
        event.stopPropagation();
        openReportModal();
      }, true);
      document.addEventListener('keydown', (event) => {
        if (event.key === 'Escape') {
          closeReportModal();
        }
      });
      els.refreshBtn.addEventListener('click', () => loadAllData(true));
      els.clearLiveBtn.addEventListener('click', () => {
        clearCurrentQuestion();
        closeResultDialog();
        renderCurrentBoard();
        updateTopStats();
      });
      if (els.logoutBtn) els.logoutBtn.addEventListener('click', () => doLogout(true, false));
      if (els.classManagerBtn) els.classManagerBtn.addEventListener('click', openClassManagerModal);
      window.addEventListener('resize', updateClassManagerStickyOffsets);
      if (els.classManagerCloseBtn) els.classManagerCloseBtn.addEventListener('click', closeClassManagerModal);
      if (els.classManagerModal) {
        els.classManagerModal.addEventListener('click', (event) => {
          if (event.target && event.target.getAttribute('data-class-manager-close') === '1') closeClassManagerModal();
        });
      }
      if (els.confirmActionModal) {
        els.confirmActionModal.addEventListener('click', (event) => {
          if (event.target && event.target.getAttribute('data-confirm-close') === '1') closeConfirmAction(false);
        });
      }
      if (els.confirmActionOkBtn) els.confirmActionOkBtn.addEventListener('click', () => closeConfirmAction(true));
      if (els.confirmActionCancelBtn) els.confirmActionCancelBtn.addEventListener('click', () => closeConfirmAction(false));
      if (els.alertModal) {
        els.alertModal.addEventListener('click', (event) => {
          if (event.target && event.target.getAttribute('data-alert-close') === '1') closeAlertModal();
        });
      }
      if (els.alertModalOkBtn) els.alertModalOkBtn.addEventListener('click', () => closeAlertModal(true));
      if (els.limitedUpgradeModal) {
        els.limitedUpgradeModal.addEventListener('click', (event) => {
          if (event.target && event.target.closest && event.target.closest('[data-limited-upgrade-close="1"]')) {
            closeLimitedUpgradeNotice();
          }
        });
      }
      if (els.resultClassRequiredModal) {
        els.resultClassRequiredModal.addEventListener('click', (event) => {
          if (event.target && event.target.closest && event.target.closest('[data-result-class-required-close="1"]')) {
            closeResultClassRequiredModal();
          }
        });
      }
      if (els.resultClassRequiredCloseBtn) els.resultClassRequiredCloseBtn.addEventListener('click', closeResultClassRequiredModal);
      if (els.resultClassRequiredSelect) els.resultClassRequiredSelect.addEventListener('change', applyResultClassRequiredSelection);

      if (els.limitedUpgradeActionBtn) els.limitedUpgradeActionBtn.addEventListener('click', () => {
        const mode = accessNoticeMode;
        const fullscreenHost = accessNoticeFullscreenHost || currentAccessFullscreenHost();
        closeLimitedUpgradeNotice();
        if (mode === 'guest') {
          const pending = window.mvipAccessLoginReturn && window.mvipAccessLoginReturn.begin();
          if (pending && typeof pending.catch === 'function') pending.catch(() => {});
          return;
        }
        hostSubscriptionForAccessNotice(fullscreenHost);
        openSubscriptionModal();
      });
      if (els.subscriptionModal && typeof MutationObserver === 'function') {
        const accessSubscriptionObserver = new MutationObserver(() => {
          if (els.subscriptionModal.hidden) restoreAccessSubscriptionHome();
        });
        accessSubscriptionObserver.observe(els.subscriptionModal, { attributes: true, attributeFilter: ['hidden'] });
      }

      if (els.classManagerTabRosterBtn) els.classManagerTabRosterBtn.addEventListener('click', () => setClassManagerTab('roster'));
      if (els.classManagerTabExamBtn) els.classManagerTabExamBtn.addEventListener('click', openExamConfigManagerTab);
      if (els.classManagerTabCv7991Btn) els.classManagerTabCv7991Btn.addEventListener('click', () => {
        if (guardLimitedAccount('feature')) return;
        setClassManagerTab('cv7991');
      });
      if (els.classManagerTabOutlineBtn) els.classManagerTabOutlineBtn.addEventListener('click', () => {
        if (guardLimitedAccount('feature')) return;
        setClassManagerTab('outline');
      });
      if (els.cv7991OpenMatrixBtn) els.cv7991OpenMatrixBtn.addEventListener('click', handleCv7991OpenMatrixClick);
      if (els.cv7991OpenSpecBtn) els.cv7991OpenSpecBtn.addEventListener('click', () => openCv7991Editor('spec'));
      if (els.cv7991MatrixExitBtn) els.cv7991MatrixExitBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        closeCv7991Editor('matrix');
      });
      document.querySelectorAll('[data-cv7991-editor-close]').forEach((btn) => {
        btn.addEventListener('click', async (event) => {
          const kind = btn.dataset.cv7991EditorClose || 'matrix';
          if (kind === 'matrix' && state.classManagerTab === 'outline') {
            if (event) {
              event.preventDefault();
              event.stopPropagation();
            }
            closeCv7991Editor('matrix');
            runCv7991ReviewOutline(btn);
            return;
          }
          if (kind === 'matrix' && btn === els.cv7991MatrixSaveBtn) {
            if (event) {
              event.preventDefault();
              event.stopPropagation();
            }
            await handleCv7991MatrixSaveClick(btn);
            return;
          }
          closeCv7991Editor(kind);
        });
      });
      document.addEventListener('keydown', (event) => {
        if (event.key !== 'Escape') return;
        if (els.limitedUpgradeModal && !els.limitedUpgradeModal.hidden) closeLimitedUpgradeNotice();
        else if (els.singleExamGuideModal && !els.singleExamGuideModal.hidden) closeSingleExamGuide();
        else if (els.alertModal && !els.alertModal.hidden) closeAlertModal();
        else if (els.addClassDialog && !els.addClassDialog.hidden) closeAddClassDialog();
        else if (els.regularTestQuestionModal && !els.regularTestQuestionModal.hidden) closeRegularTestQuestionEditor();
        else if (els.cv7991ReviewExportModal && !els.cv7991ReviewExportModal.hidden) closeCv7991ReviewExportDialog();
        else if (els.cv7991ExamTitleModal && !els.cv7991ExamTitleModal.hidden) closeCv7991ExamTitleDialog();
        else if (els.cv7991SingleExamOptionsModal && !els.cv7991SingleExamOptionsModal.hidden) closeCv7991SingleExamOptionsDialog();
        else if (els.cv7991GenerateExamModal && !els.cv7991GenerateExamModal.hidden) closeCv7991GenerateExamDialog();
        else if (els.cv7991SpecModal && !els.cv7991SpecModal.hidden) closeCv7991Editor('spec');
        else if (els.cv7991MatrixModal && !els.cv7991MatrixModal.hidden) closeCv7991Editor('matrix');
      });
      bindDirectQuestionCountEntry(els.cv7991MatrixTable, '.cv7991-matrix-input');
      bindDirectQuestionCountEntry(els.regularTestQuestionTable, '.regular-question-input');
      if (els.cv7991MatrixTable) els.cv7991MatrixTable.addEventListener('input', () => {
        recalcCv7991Matrix();
        updateCv7991FreezeEssayVisibility();
      });
      if (els.cv7991MatrixTable) els.cv7991MatrixTable.addEventListener('change', () => {
        recalcCv7991Matrix();
        updateCv7991FreezeEssayVisibility();
      });
      if (els.cv7991SpecFilterMatrixBtn) els.cv7991SpecFilterMatrixBtn.addEventListener('click', toggleCv7991SpecMatrixFilter);
      if (els.cv7991ScoreToggleBtn && els.cv7991ScorePanel) {
        els.cv7991ScoreToggleBtn.addEventListener('click', () => {
          els.cv7991ScorePanel.hidden = !els.cv7991ScorePanel.hidden;
          els.cv7991ScoreToggleBtn.textContent = els.cv7991ScorePanel.hidden ? 'Mở cài đặt điểm số' : 'Ẩn cài đặt điểm số';
          updateCv7991ScoreSummary();
        });
      }
      ['cv7991ScoreMcInput','cv7991ScoreTfModeInput','cv7991ScoreShortInput','cv7991ScoreEssayInput'].forEach((id) => {
        const input = document.getElementById(id);
        if (input) {
          const syncScore = () => {
            recalcCv7991Matrix();
            updateCv7991ScoreSummary();
          };
          input.addEventListener('input', syncScore);
          input.addEventListener('change', syncScore);
        }
      });
      if (els.cv7991ClassChecklist) els.cv7991ClassChecklist.addEventListener('change', handleCv7991ClassChecklistChange);
      if (els.cv7991OpenExamTitleBtn) els.cv7991OpenExamTitleBtn.addEventListener('click', openCv7991ExamTitleDialog);
      if (els.cv7991MatrixOpenExamTitleBtn) els.cv7991MatrixOpenExamTitleBtn.addEventListener('click', openCv7991ExamTitleDialog);
      if (els.cv7991ExamTitleCloseBtn) els.cv7991ExamTitleCloseBtn.addEventListener('click', closeCv7991ExamTitleDialog);
      if (els.cv7991ExamTitleModal) els.cv7991ExamTitleModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-title-close') === '1') closeCv7991ExamTitleDialog();
      });
      if (els.cv7991ExamTitleTableWrap) els.cv7991ExamTitleTableWrap.addEventListener('click', (event) => {
        const button = event.target && event.target.closest ? event.target.closest('[data-cv7991-title-pick]') : null;
        if (!button) return;
        if (els.cv7991ExamTitleModalInput) els.cv7991ExamTitleModalInput.value = button.getAttribute('data-cv7991-title-pick') || '';
      });
      if (els.cv7991UseExamTitleBtn) els.cv7991UseExamTitleBtn.addEventListener('click', useCv7991ExamTitleFromDialog);
      if (els.cv7991ExamTitleModalInput) els.cv7991ExamTitleModalInput.addEventListener('keydown', (event) => {
        if (event.key === 'Enter') {
          event.preventDefault();
          useCv7991ExamTitleFromDialog();
        }
      });
      if (els.cv7991ExamTitleInput) els.cv7991ExamTitleInput.addEventListener('input', () => {
        updateCv7991DuplicateTitleHint();
        updateCv7991ExamTitleDisplay();
      });
      updateCv7991ExamTitleDisplay();
      updateCv7991ScoreSummary();
      if (els.cv7991BankSourceWordRadio) els.cv7991BankSourceWordRadio.addEventListener('change', () => selectCv7991BankSource('word'));
      if (els.cv7991BankSourceMvipRadio) els.cv7991BankSourceMvipRadio.addEventListener('change', () => selectCv7991BankSource('mvip'));
      if (els.cv7991LoadBankBtn) els.cv7991LoadBankBtn.addEventListener('click', () => selectCv7991BankSource('mvip'));
      if (els.cv7991QuestionBankSelect) els.cv7991QuestionBankSelect.addEventListener('change', () => {
        selectCv7991BankSource('mvip');
        const url = cv7991SelectedMvipBankUrl();
        if ((state.cv7991Bank && state.cv7991Bank.url && String(state.cv7991Bank.url || '') !== url)
          || (state.cv7991BankCatalog && String(state.cv7991BankCatalog.url || '') !== url)) {
          state.cv7991Bank = null;
          state.cv7991BankCatalog = null;
          state.cv7991BankCatalogPromise = null;
          state.cv7991BankLoadPromise = null;
          setCv7991MvipBankStatus('Đã đổi ngân hàng đề của Mvip. Bấm Biên soạn ma trận để tải danh mục bài mới.', '');
          setCv7991BankStatus('Chưa tải danh mục ngân hàng câu hỏi.', '');
        }
      });
      if (els.cv7991ImportWordBtn && els.cv7991WordFileInput) els.cv7991ImportWordBtn.addEventListener('click', () => {
        selectCv7991BankSource('word');
        els.cv7991WordFileInput.click();
      });
      if (els.cv7991DownloadTemplateBtn) els.cv7991DownloadTemplateBtn.addEventListener('click', () => {
        selectCv7991BankSource('word');
        downloadCv7991TemplateWord();
      });
      if (els.cv7991WordFileInput) els.cv7991WordFileInput.addEventListener('change', async () => {
        const file = els.cv7991WordFileInput.files && els.cv7991WordFileInput.files[0];
        await loadCv7991QuestionBankFromFile(file);
        els.cv7991WordFileInput.value = '';
      });
      selectCv7991BankSource(state.cv7991BankSource || 'word');
      const syncCv7991GenerateButtonText = () => {
        const label = 'Lựa chọn cách sinh đề';
        if (els.cv7991GenerateExamBtn) els.cv7991GenerateExamBtn.textContent = label;
        if (els.cv7991GenerateExamRunBtn) els.cv7991GenerateExamRunBtn.textContent = label;
      };
      if (els.cv7991ReviewOutlineCheckbox) {
        els.cv7991ReviewOutlineCheckbox.addEventListener('change', syncCv7991GenerateButtonText);
      }
      syncCv7991GenerateButtonText();
      const runCv7991ReviewOutline = async (button) => {
        const actionButton = button || els.cv7991ReviewOutlineBtn;
        if (!actionButton || actionButton.dataset.busy === '1') return;
        const oldText = actionButton.textContent;
        actionButton.dataset.busy = '1';
        actionButton.disabled = true;
        actionButton.textContent = 'Đang sinh đề cương...';
        try {
          state.cv7991PendingExport = null;
          if (state.classManagerTab === 'outline') applyCv7991PanelMode();
          await generateCv7991ReviewOutline({ silentSuccess: true, forceReviewTitle: true });
          if (state.cv7991PendingExport && state.cv7991PendingExport.isReviewOutline) {
            openCv7991ReviewExportDialog();
          }
        } catch (error) {
          const message = error.message || 'Không thể sinh đề cương ôn tập.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText || 'Sinh đề cương ôn tập';
        }
      };
      const runCv7991GenerateExam = async (button) => {
        const actionButton = button || els.cv7991GenerateExamRunBtn || els.cv7991GenerateExamBtn;
        if (!actionButton || actionButton.dataset.busy === '1') return;
        const scrollX = window.scrollX;
        const scrollY = window.scrollY;
        const oldText = actionButton.textContent;
        actionButton.dataset.busy = '1';
        actionButton.disabled = true;
        actionButton.textContent = 'Đang sinh đề...';
        state.classManagerTab = 'cv7991';
        try {
          if (els.cv7991ReviewOutlineCheckbox && els.cv7991ReviewOutlineCheckbox.checked) {
            await generateCv7991ReviewOutline();
          } else {
            await generateCv7991Exams();
          }
          setClassManagerTab('cv7991');
          requestAnimationFrame(() => window.scrollTo(scrollX, scrollY));
        } catch (error) {
          const message = error.message || 'Không thể sinh đề CV7991.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText;
          syncCv7991GenerateButtonText();
        }
      };
      const runCv7991SingleExam = async (button) => {
        const actionButton = button || els.cv7991SingleExamRunBtn || els.cv7991GenerateSingleExamBtn;
        if (!actionButton || actionButton.dataset.busy === '1') return;
        const oldText = actionButton.textContent;
        actionButton.dataset.busy = '1';
        actionButton.disabled = true;
        actionButton.textContent = 'Đang sinh đề...';
        try {
          await generateCv7991SingleExam({
            sortByLevel: true,
            sortByUnit: false,
            showSpecQuestionNumbers: !!(els.cv7991SpecQuestionNumbersCheckbox && els.cv7991SpecQuestionNumbersCheckbox.checked),
          });
        } catch (error) {
          const message = error.message || 'Không thể sinh 01 đề duy nhất.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText;
        }
      };
      const runCv7991ExportExam = async (skipTemplateDialog = false) => {
        if (!skipTemplateDialog) {
          cv7991WordTemplateConfirmRunner = () => runCv7991ExportExam(true);
          openCv7991WordTemplateDialog('export_pending');
          return;
        }
        try {
          await exportCv7991PendingExam();
        } catch (error) {
          const message = error.message || 'Không thể xuất đề CV7991.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        }
      };
      const runCv7991GenerateExamAndExport = async (button, skipTemplateDialog = false) => {
        if (!skipTemplateDialog) {
          cv7991WordTemplateConfirmRunner = () => runCv7991GenerateExamAndExport(button || els.cv7991GenerateExamExportBtn, true);
          openCv7991WordTemplateDialog('generate_multi');
          return;
        }
        const actionButton = button || els.cv7991GenerateExamExportBtn || els.cv7991GenerateExamBtn;
        if (!actionButton || actionButton.dataset.busy === '1') return;
        const scrollX = window.scrollX;
        const scrollY = window.scrollY;
        const oldText = actionButton.textContent;
        actionButton.dataset.busy = '1';
        actionButton.disabled = true;
        actionButton.textContent = 'Đang sinh và xuất Word...';
        state.classManagerTab = 'cv7991';
        try {
          state.cv7991PendingExport = null;
          const generateMode = getCv7991GenerateChoiceMode();
          if (generateMode === 'single') {
            await generateCv7991SingleExam({
              sortByLevel: true,
              sortByUnit: false,
              showSpecQuestionNumbers: !!(els.cv7991SpecQuestionNumbersCheckbox && els.cv7991SpecQuestionNumbersCheckbox.checked),
              silentSuccess: true,
            });
          } else {
            if (generateMode === 'fixed_count') {
              if (els.cv7991FreezeEssayCheckbox && els.cv7991FixedFreezeEssayCheckbox) els.cv7991FreezeEssayCheckbox.checked = !!els.cv7991FixedFreezeEssayCheckbox.checked;
              if (els.cv7991SameQuizShuffleCheckbox && els.cv7991FixedSameQuizShuffleCheckbox) els.cv7991SameQuizShuffleCheckbox.checked = !!els.cv7991FixedSameQuizShuffleCheckbox.checked;
            }
            await generateCv7991Exams({ silentSuccess: true });
          }
          if (!state.cv7991PendingExport || !Array.isArray(state.cv7991PendingExport.versions) || !state.cv7991PendingExport.versions.length) return;
          setClassManagerTab('cv7991');
          await exportCv7991PendingExam();
          closeCv7991GenerateExamDialog();
          requestAnimationFrame(() => window.scrollTo(scrollX, scrollY));
        } catch (error) {
          const message = error.message || 'Không thể sinh và xuất đề CV7991.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText;
          syncCv7991GenerateButtonText();
        }
      };
      const runCv7991SingleExamAndExport = async (button, skipTemplateDialog = false) => {
        if (!skipTemplateDialog) {
          cv7991WordTemplateConfirmRunner = () => runCv7991SingleExamAndExport(button || els.cv7991SingleExamExportBtn, true);
          openCv7991WordTemplateDialog('generate_single');
          return;
        }
        const actionButton = button || els.cv7991SingleExamExportBtn || els.cv7991GenerateSingleExamBtn;
        if (!actionButton || actionButton.dataset.busy === '1') return;
        const oldText = actionButton.textContent;
        actionButton.dataset.busy = '1';
        actionButton.disabled = true;
        actionButton.textContent = 'Đang sinh và xuất Word...';
        try {
          state.cv7991PendingExport = null;
          await generateCv7991SingleExam({
            sortByLevel: true,
            sortByUnit: false,
            showSpecQuestionNumbers: !!(els.cv7991SpecQuestionNumbersCheckbox && els.cv7991SpecQuestionNumbersCheckbox.checked),
            silentSuccess: true,
          });
          if (!state.cv7991PendingExport || !Array.isArray(state.cv7991PendingExport.versions) || !state.cv7991PendingExport.versions.length) return;
          await exportCv7991PendingExam();
          closeCv7991SingleExamOptionsDialog();
        } catch (error) {
          const message = error.message || 'Không thể sinh 01 đề duy nhất và xuất Word.';
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          actionButton.disabled = false;
          actionButton.dataset.busy = '0';
          actionButton.textContent = oldText;
        }
      };
      [els.cv7991GenerateModeSingleRadio, els.cv7991CodeModePerStudentRadio, els.cv7991CodeModeCountRadio].forEach((radio) => {
        if (radio) radio.addEventListener('change', syncCv7991CodeModeControls);
      });
      syncCv7991CodeModeControls();
      if (els.cv7991GenerateExamBtn) els.cv7991GenerateExamBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        openCv7991GenerateExamDialog();
      });
      if (els.cv7991ReviewOutlineBtn) els.cv7991ReviewOutlineBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        runCv7991ReviewOutline(els.cv7991ReviewOutlineBtn);
      });
      if (els.cv7991GenerateExamRunBtn) els.cv7991GenerateExamRunBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        runCv7991GenerateExam(els.cv7991GenerateExamRunBtn);
      });
      if (els.cv7991GenerateExamExportBtn) els.cv7991GenerateExamExportBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        runCv7991GenerateExamAndExport(els.cv7991GenerateExamExportBtn);
      });
      if (els.cv7991GenerateExamCloseBtn) els.cv7991GenerateExamCloseBtn.addEventListener('click', closeCv7991GenerateExamDialog);
      if (els.cv7991ReviewExportOkBtn) els.cv7991ReviewExportOkBtn.addEventListener('click', confirmCv7991ReviewExportDialog);
      if (els.cv7991ReviewExportCloseBtn) els.cv7991ReviewExportCloseBtn.addEventListener('click', closeCv7991ReviewExportDialog);
      if (els.cv7991ReviewExportModal) els.cv7991ReviewExportModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-review-export-close') === '1') closeCv7991ReviewExportDialog();
      });
      if (els.cv7991GenerateExamModal) els.cv7991GenerateExamModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-generate-close') === '1') closeCv7991GenerateExamDialog();
      });
      if (els.cv7991GenerateSingleExamBtn) els.cv7991GenerateSingleExamBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        openCv7991SingleExamOptionsDialog();
      });
      if (els.cv7991SingleExamRunBtn) els.cv7991SingleExamRunBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        runCv7991SingleExam(els.cv7991SingleExamRunBtn);
      });
      if (els.cv7991SingleExamExportBtn) els.cv7991SingleExamExportBtn.addEventListener('click', (event) => {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        runCv7991SingleExamAndExport(els.cv7991SingleExamExportBtn);
      });
      if (els.cv7991SingleExamOptionsCloseBtn) els.cv7991SingleExamOptionsCloseBtn.addEventListener('click', closeCv7991SingleExamOptionsDialog);
      if (els.cv7991SingleExamOptionsModal) els.cv7991SingleExamOptionsModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-single-close') === '1') closeCv7991SingleExamOptionsDialog();
      });
      [
        els.cv7991WordTemplateDistrictInput,
        els.cv7991WordTemplateSchoolInput,
        els.cv7991WordTemplateSchoolYearInput,
        els.cv7991WordTemplateDurationInput,
        els.cv7991WordTemplateEssayLineCountInput
      ].forEach((input) => {
        if (!input) return;
        input.addEventListener('input', renderCv7991WordTemplateLivePreview);
        input.addEventListener('change', renderCv7991WordTemplateLivePreview);
      });

      [
        els.cv7991WordTemplateForm1Radio,
        els.cv7991WordTemplateForm2Radio,
        els.cv7991WordTemplateForm3Radio,
        els.cv7991WordTemplateForm4Radio,
        els.cv7991WordTemplateForm5Radio
      ].forEach((radio) => {
        if (radio) radio.addEventListener('change', () => {
          const checked=document.querySelector('input[name="cv7991WordTemplateMode"]:checked');
          state.cv7991WordExportTemplate = cv7991NormalizeWordTemplateMode(checked && checked.value || 'form1');
          syncCv7991WordTemplateDialog();
        });
      });
      if (els.cv7991WordTemplateForm1PreviewBtn) els.cv7991WordTemplateForm1PreviewBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        openCv7991WordTemplatePreview('form1');
      });
      if (els.cv7991WordTemplateForm2PreviewBtn) els.cv7991WordTemplateForm2PreviewBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        openCv7991WordTemplatePreview('form2');
      });
      if (els.cv7991WordTemplateForm3PreviewBtn) els.cv7991WordTemplateForm3PreviewBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        openCv7991WordTemplatePreview('form3');
      });
      if (els.cv7991WordTemplateForm4PreviewBtn) els.cv7991WordTemplateForm4PreviewBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        openCv7991WordTemplatePreview('form4');
      });
      if (els.cv7991WordTemplateForm5PreviewBtn) els.cv7991WordTemplateForm5PreviewBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        openCv7991WordTemplatePreview('form5');
      });
      if (els.cv7991WordTemplatePreviewCloseBtn) els.cv7991WordTemplatePreviewCloseBtn.addEventListener('click', closeCv7991WordTemplatePreview);
      if (els.cv7991WordTemplatePreviewModal) els.cv7991WordTemplatePreviewModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-word-template-preview-close') === '1') closeCv7991WordTemplatePreview();
      });
      if (els.cv7991WordTemplateCloseBtn) els.cv7991WordTemplateCloseBtn.addEventListener('click', (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        closeCv7991WordTemplateDialog(true);
      });
      const setCv7991WordExportWaitVisible = (visible) => {
        const wait = els.cv7991WordExportWait;
        if (!wait) return;
        wait.hidden = !visible;
        wait.setAttribute('aria-busy', visible ? 'true' : 'false');
      };
      const waitCv7991BrowserPaint = () => new Promise((resolve) => {
        requestAnimationFrame(() => requestAnimationFrame(resolve));
      });

      if (els.cv7991WordTemplateOkBtn) els.cv7991WordTemplateOkBtn.addEventListener('click', async (event) => {
        if (event) { event.preventDefault(); event.stopPropagation(); }
        const button = els.cv7991WordTemplateOkBtn;
        if (!button || button.dataset.busy === '1') return;
        const oldText = button.textContent;
        button.dataset.busy = '1';
        button.disabled = true;
        button.textContent = 'Đang xuất...';
        setCv7991WordExportWaitVisible(true);
        try {
          // Cho trình duyệt kịp vẽ thông báo trước khi bắt đầu sinh file Word.
          await waitCv7991BrowserPaint();
          await confirmCv7991WordTemplateDialog();
        } catch (error) {
          const message = error && error.message ? error.message : 'Không thể sinh và xuất đề Word.';
          console.error('Lỗi xác nhận form và xuất đề Word:', error);
          setCv7991BankStatus(message, 'err');
          openAlertModal(message, 'Không thể xuất đề');
        } finally {
          setCv7991WordExportWaitVisible(false);
          button.disabled = false;
          button.dataset.busy = '0';
          button.textContent = oldText || 'OK';
        }
      });
      if (els.cv7991WordTemplateModal) els.cv7991WordTemplateModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-cv7991-word-template-close') === '1') closeCv7991WordTemplateDialog(true);
      });
      if (els.cv7991ExportExamBtn) els.cv7991ExportExamBtn.addEventListener('click', runCv7991ExportExam);
      if (els.cv7991DeleteExamBtn) els.cv7991DeleteExamBtn.addEventListener('click', deleteSelectedCv7991ExamConfig);
      if (els.cv7991ResetMatrixBtn) els.cv7991ResetMatrixBtn.addEventListener('click', resetCv7991MatrixEditor);
      if (els.classManagerSelect) els.classManagerSelect.addEventListener('change', () => {
        refreshClassManagerEditors(els.classManagerSelect.value || '');
      });
      if (els.examClassManagerChecklist) els.examClassManagerChecklist.addEventListener('change', (event) => {
        const target = event.target;
        if (!(target instanceof HTMLInputElement) || !target.classList.contains('exam-class-manager-check')) return;
        const values = Array.from(els.examClassManagerChecklist.querySelectorAll('.exam-class-manager-check:checked')).map((input) => normMonKey(input.value || '')).filter(Boolean);
        setSelectedExamManagerMons(values);
      });
      if (els.examConfigEditSelect) els.examConfigEditSelect.addEventListener('change', () => {
        const value = parseInt(String(els.examConfigEditSelect.value || 0), 10);
        state.managerExamEditNo = Number.isNaN(value) || value < 1 ? 0 : value;
        renderExamConfigEditor(state.managerExamMons);
      });
      [els.examConfigNameInput, els.examCodeCountInput, els.examQuestionCountInput, els.examAnswerKeysEditor].forEach((control) => {
        if (!control) return;
        control.addEventListener('pointerdown', (event) => {
          guardExamConfigEditorInteraction(event);
        });
        control.addEventListener('focus', (event) => {
          guardExamConfigEditorInteraction(event);
        });
      });
      if (els.addClassSubjectBtn) els.addClassSubjectBtn.addEventListener('click', openAddClassDialog);
      if (els.classManagerListRows) els.classManagerListRows.addEventListener('click', (event) => {
        const button = event.target && event.target.closest ? event.target.closest('[data-class-manager-action]') : null;
        if (!button) return;
        const mon = normMonKey(button.getAttribute('data-mon') || '');
        const action = button.getAttribute('data-class-manager-action') || '';
        if (action === 'edit') openEditClassDialog(mon);
        if (action === 'delete') deleteClassSubjectFromManager(mon);
      });
      if (els.addClassGradeSelect) els.addClassGradeSelect.addEventListener('change', () => renderAddClassSubjectOptions());
      if (els.addClassSubjectSelect) els.addClassSubjectSelect.addEventListener('change', () => {
        syncAddClassCustomSubjectInput(true);
        addClassStatus('');
      });
      if (els.addClassRosterInput) els.addClassRosterInput.addEventListener('input', scheduleAddClassRosterTableRender);
      if (els.addClassRosterTableBody) els.addClassRosterTableBody.addEventListener('change', handleAddClassDropoutChange);
      if (els.addClassSaveBtn) els.addClassSaveBtn.addEventListener('click', saveAddClassDialog);
      if (els.addClassCancelBtn) els.addClassCancelBtn.addEventListener('click', closeAddClassDialog);
      if (els.addClassCancelTopBtn) els.addClassCancelTopBtn.addEventListener('click', closeAddClassDialog);
      if (els.addClassDialog) {
        els.addClassDialog.addEventListener('click', (event) => {
          if (event.target && event.target.getAttribute('data-add-class-close') === '1') closeAddClassDialog();
        });
      }
      if (els.deleteClassSubjectBtn) els.deleteClassSubjectBtn.addEventListener('click', () => deleteClassSubjectFromManager());
      if (els.saveRosterBtn) els.saveRosterBtn.addEventListener('click', async () => {
        try {
          const mon = normMonKey(els.classManagerSelect.value || state.managerMon || '');
          if (!mon) throw new Error('Bạn chọn Lớp - Môn trước khi lưu danh sách.');
          const students = parseRosterText(els.rosterEditor.value || '', classDataStudents(mon));
          els.rosterEditor.value = rosterToText(students);
          const entry = ensureClassEntry(mon);
          entry.students = students;
          entry.droppedStudents = normalizeDroppedStudents(entry.droppedStudents, students);
          syncExamConfigsForEntry(entry, students);
          state.managerMon = mon;
          state.currentMon = mon;
          await pushClassDataToServerAndRefresh(`Đã lưu danh sách học sinh cho ${mon}.`);
          renderClassManagerSelect();
          renderExamConfigEditor(state.managerExamMons);
        } catch (error) {
          classManagerStatus(error.message || 'Không thể lưu danh sách học sinh.', 'err');
        }
      });
      if (els.clearRosterBtn) els.clearRosterBtn.addEventListener('click', async () => {
        try {
          const mon = normMonKey(els.classManagerSelect.value || state.managerMon || '');
          if (!mon) throw new Error('Bạn chọn Lớp - Môn trước khi xóa danh sách.');
          const ok = await openConfirmAction(`Bạn có chắc chắn xóa toàn bộ danh sách học sinh của "${mon}" không?`);
          if (!ok) return;
          const entry = ensureClassEntry(mon);
          entry.students = {};
          entry.droppedStudents = {};
          syncExamConfigsForEntry(entry, {});
          els.rosterEditor.value = '';
          state.managerMon = mon;
          state.currentMon = mon;
          await pushClassDataToServerAndRefresh(`Đã xóa danh sách học sinh của ${mon}.`);
          renderClassManagerSelect();
          renderExamConfigEditor(state.managerExamMons);
        } catch (error) {
          classManagerStatus(error.message || 'Không thể xóa danh sách học sinh.', 'err');
        }
      });
      async function handleSaveExamConfigRequest(options = {}) {
        const silent = !!(options && options.silent);
        try {
          const mons = selectedExamManagerMons();
          if (!mons.length) throw new Error('Bạn tích chọn ít nhất 1 Lớp - Môn trước khi lưu đề trắc nghiệm.');
          const editingExamNoRaw = parseInt(String((els.examConfigEditSelect && els.examConfigEditSelect.value) || state.managerExamEditNo || 0), 10);
          const editingExamNo = Number.isNaN(editingExamNoRaw) || editingExamNoRaw < 1 ? 0 : editingExamNoRaw;
          const configName = String((els.examConfigNameInput && els.examConfigNameInput.value) || '').trim();
          const codeCount = parseInt(String(els.examCodeCountInput.value || '').trim(), 10);
          const questionCount = parseInt(String(els.examQuestionCountInput.value || '').trim(), 10);
          if (Number.isNaN(codeCount) || codeCount < 1) throw new Error('Số mã đề phải là số nguyên dương.');
          if (Number.isNaN(questionCount) || questionCount < 1) throw new Error('Số câu phải là số nguyên dương.');
          const lines = String(els.examAnswerKeysEditor.value || '').replace(/\r/g, '').split('\n').map((x) => x.trim()).filter(Boolean);
          if (lines.length !== codeCount) throw new Error(`Bạn đang khai ${lines.length} dòng đáp án, nhưng số mã đề là ${codeCount}.`);
          const codeOrder = [];
          const answerKeys = {};
          lines.forEach((line, idx) => {
            const m = line.match(/^([^:]+)\s*:\s*(.+)$/);
            if (!m) throw new Error(`Dòng đáp án ${idx + 1} phải theo mẫu "1: ABCD...".`);
            const code = String(m[1] || '').trim();
            if (!code) throw new Error(`Dòng đáp án ${idx + 1} chưa có tên mã đề.`);
            if (codeOrder.includes(code)) throw new Error(`Mã đề ${code} bị lặp.`);
            const arr = parseAnswerKeySequence(m[2]);
            if (arr.length !== questionCount) throw new Error(`Mã đề ${code} có ${arr.length} đáp án, không khớp số câu ${questionCount}.`);
            codeOrder.push(code);
            answerKeys[code] = arr;
          });
          if (editingExamNo) {
            const invalidMons = mons.filter((mon) => !editableExamConfigsForMon(mon).some((cfg) => cfg.examNo === editingExamNo));
            if (invalidMons.length) {
              if (invalidMons.length === 1) throw new Error(`Lớp-Môn "${invalidMons[0]}" không còn cấu hình chưa dùng để sửa theo lựa chọn hiện tại.`);
              throw new Error(`Các Lớp-Môn sau không còn cấu hình chưa dùng để sửa theo lựa chọn hiện tại: ${invalidMons.join(', ')}.`);
            }
          }
          if (configName) {
            const duplicateMons = mons.filter((mon) => {
              const entry = ensureClassEntry(mon);
              return hasDuplicateExamConfigNameForEntry(entry, configName, editingExamNo);
            });
            if (duplicateMons.length) {
              if (duplicateMons.length === 1) throw new Error(`Lớp-Môn "${duplicateMons[0]}" đã có tên đề "${configName}". Vui lòng nhập tên khác.`);
              throw new Error(`Các Lớp-Môn sau đã có tên đề "${configName}": ${duplicateMons.join(', ')}. Vui lòng nhập tên khác.`);
            }
          }
          let resultExamNo = 0;
          mons.forEach((mon) => {
            const entry = ensureClassEntry(mon);
            const savedExamNo = editingExamNo || (examConfigSaveCount(entry) + 1);
            const existingCfg = editingExamNo ? syncExamConfigsForEntry(entry, entry.students).find((cfg) => cfg.examNo === savedExamNo) : null;
            if (!editingExamNo) entry.examConfigSaveCount = savedExamNo;
            const savedExamUid = (existingCfg && existingCfg.examUid) || makeExamUid(mon, savedExamNo);
            const savedCreatedAt = (existingCfg && existingCfg.createdAt) || new Date().toISOString();
            const savedCfg = normalizeStoredExamConfig({ enabled: true, examNo: savedExamNo, examUid: savedExamUid, createdAt: savedCreatedAt, name: configName, questionCount, codeOrder, answerKeys }, entry.students);
            const configs = syncExamConfigsForEntry(entry, entry.students).filter((cfg) => cfg.examNo !== savedExamNo);
            configs.push(savedCfg);
            entry.examConfigs = configs.sort((a, b) => a.examNo - b.examNo);
            entry.examConfig = savedCfg;
            if (!editingExamNo) purgeExamHistoryForConfig(mon, savedExamNo);
            setSelectedExamNoForMon(mon, savedExamNo);
            if (!resultExamNo) resultExamNo = savedExamNo;
          });
          state.managerExamEditNo = 0;
          await pushClassDataToServerAndRefresh(`${editingExamNo ? 'Đã cập nhật' : 'Đã lưu'} đề trắc nghiệm${configName ? ` "${configName}"` : ''} cho ${mons.length} Lớp - Môn: ${mons.join(', ')}.`);
          if (!editingExamNo) await apiPut('/api/scan-history', { data: state.scanHistory || {} });
          state.managerMon = mons[0] || state.managerMon;
          state.managerExamMons = mons.slice();
          renderClassManagerSelect();
          if (els.classManagerSelect && mons[0]) els.classManagerSelect.value = mons[0];
          renderExamConfigEditor(state.managerExamMons);
          if (els.examConfigEditSelect) els.examConfigEditSelect.value = '';
          if (els.clearExamConfigBtn) els.clearExamConfigBtn.disabled = true;
          return { ok: true, examNo: resultExamNo, mons: mons.slice() };
        } catch (error) {
          if (!silent) openAlertModal(error.message || 'Không thể lưu đề trắc nghiệm.', 'Thông báo');
          throw error;
        }
      }
      window.handleSaveExamConfigRequest = handleSaveExamConfigRequest;
      if (els.saveExamConfigBtn) els.saveExamConfigBtn.addEventListener('click', async () => {
        try {
          await handleSaveExamConfigRequest();
        } catch (_) {}
      });

      if (els.clearExamConfigBtn) els.clearExamConfigBtn.addEventListener('click', async () => {
        try {
          const mons = selectedExamManagerMons();
          if (!mons.length) throw new Error('Bạn tích chọn ít nhất 1 Lớp - Môn trước khi xóa nội dung hoặc đề trắc nghiệm.');
          const editingExamNoRaw = parseInt(String((els.examConfigEditSelect && els.examConfigEditSelect.value) || state.managerExamEditNo || 0), 10);
          const editingExamNo = Number.isNaN(editingExamNoRaw) || editingExamNoRaw < 1 ? 0 : editingExamNoRaw;
          if (!editingExamNo) {
            throw new Error('Bạn chọn đề đã lưu chưa dùng trước khi xóa.');
          }
          const invalidMons = mons.filter((mon) => !editableExamConfigsForMon(mon).some((cfg) => cfg.examNo === editingExamNo));
          if (invalidMons.length) {
            if (invalidMons.length === 1) {
              throw new Error(`Lớp-Môn "${invalidMons[0]}" không còn cấu hình chưa dùng để xóa theo lựa chọn hiện tại.`);
            }
            throw new Error(`Các Lớp-Môn sau không còn cấu hình chưa dùng để xóa theo lựa chọn hiện tại: ${invalidMons.join(', ')}.`);
          }
          const message = mons.length === 1
            ? `Bạn có chắc chắn xóa đề chưa dùng đang chọn của "${mons[0]}" không?`
            : `Bạn có chắc chắn xóa đề chưa dùng đang chọn của ${mons.length} Lớp - Môn đã chọn không?
${mons.join(', ')}`;
          const ok = await openConfirmAction(message);
          if (!ok) return;
          mons.forEach((mon) => {
            const entry = ensureClassEntry(mon);
            const configs = syncExamConfigsForEntry(entry, entry.students).filter((cfg) => cfg.examNo !== editingExamNo);
            entry.examConfigs = configs;
            entry.examConfig = configs.length ? configs[configs.length - 1] : emptyExamConfig();
            if (selectedExamNoForMon(mon) === editingExamNo) setSelectedExamNoForMon(mon, entry.examConfig.examNo || 0);
          });
          state.managerExamEditNo = 0;
          await pushClassDataToServerAndRefresh(`Đã xóa đề trắc nghiệm đang chọn của ${mons.join(', ')}.`);
          state.managerMon = mons[0] || state.managerMon;
          state.managerExamMons = mons.slice();
          renderClassManagerSelect();
          if (els.classManagerSelect && mons[0]) els.classManagerSelect.value = mons[0];
          renderExamConfigEditor(state.managerExamMons);
        } catch (error) {
          openAlertModal(error.message || 'Không thể xóa đề trắc nghiệm.', 'Thông báo');
        }
      });
      if (els.finishAutoBtn) els.finishAutoBtn.addEventListener('click', async () => {
        try {
          els.finishAutoBtn.disabled = true;
          await finishCurrentQuestionByExamCodes();
        } catch (error) {
          showLoginStatus(error.message || 'Không thể chấm theo mã đề.', 'err');
        } finally {
          renderCurrentBoard();
        }
      });
      if (els.examRescanBtn) els.examRescanBtn.addEventListener('click', () => {
        try {
          cancelCurrentAutoExamScan();
        } catch (error) {
          showLoginStatus(error.message || 'Không thể hủy kết quả quét hiện tại.', 'err');
          renderCurrentBoard();
        }
      });
      els.correctBtnA.addEventListener('click', () => {
        if (handleScannedAnswerChoice('A')) return;
        const stats = answeredStats();
        if (!stats.answered) return;
        state.revealAnswers = true;
        state.selectedCorrect = 'A';
        state.questionFrozen = true;
        renderCurrentBoard();
        showResultDialog('A', stats.ca, stats.answered);
      });
      els.correctBtnB.addEventListener('click', () => {
        if (handleScannedAnswerChoice('B')) return;
        const stats = answeredStats();
        if (!stats.answered) return;
        state.revealAnswers = true;
        state.selectedCorrect = 'B';
        state.questionFrozen = true;
        renderCurrentBoard();
        showResultDialog('B', stats.cb, stats.answered);
      });
      els.correctBtnC.addEventListener('click', () => {
        if (handleScannedAnswerChoice('C')) return;
        const stats = answeredStats();
        if (!stats.answered) return;
        state.revealAnswers = true;
        state.selectedCorrect = 'C';
        state.questionFrozen = true;
        renderCurrentBoard();
        showResultDialog('C', stats.cc, stats.answered);
      });
      els.correctBtnD.addEventListener('click', () => {
        if (handleScannedAnswerChoice('D')) return;
        const stats = answeredStats();
        if (!stats.answered) return;
        state.revealAnswers = true;
        state.selectedCorrect = 'D';
        state.questionFrozen = true;
        renderCurrentBoard();
        showResultDialog('D', stats.cd, stats.answered);
      });
      if (els.hideRevealBtn) els.hideRevealBtn.addEventListener('click', () => {
        resetRevealState();
        renderCurrentBoard();
      });
      els.fontSizeSelect.addEventListener('change', () => {
        const v = parseInt(els.fontSizeSelect.value || '22', 10);
        state.userAdjustedFont = true;
        state.fontSize = Number.isNaN(v) ? 22 : v;
        if (els.examFontSizeSelect) els.examFontSizeSelect.value = String(state.fontSize);
        renderCurrentBoard();
      });
      if (els.examFontSizeSelect) els.examFontSizeSelect.addEventListener('change', () => {
        const v = parseInt(els.examFontSizeSelect.value || '22', 10);
        state.userAdjustedFont = true;
        state.fontSize = Number.isNaN(v) ? 22 : v;
        if (els.fontSizeSelect) els.fontSizeSelect.value = String(state.fontSize);
        renderCurrentBoard();
      });
      if (els.columnCountSelect) els.columnCountSelect.addEventListener('change', () => {
        const v = parseInt(els.columnCountSelect.value || '3', 10);
        state.userAdjustedColumns = true;
        state.columnCount = (v === 2) ? 2 : 3;
        renderCurrentBoard();
      });
      if (els.examColumnCountSelect) els.examColumnCountSelect.addEventListener('change', () => {
        const v = parseInt(els.examColumnCountSelect.value || '5', 10);
        state.examColumnCount = [4, 5, 6].includes(v) ? v : 5;
        renderCurrentBoard();
      });
      if (els.hideExamCodesCheckbox) els.hideExamCodesCheckbox.addEventListener('change', () => {
        state.hideExamCodeValues = !!els.hideExamCodesCheckbox.checked;
        renderCurrentBoard();
      });
      if (els.examModeEnterBtn) els.examModeEnterBtn.addEventListener('click', () => {
        if (guardLimitedAccount('feature')) return;
        if (!els.useExamCodesCheckbox || els.examModeEnterBtn.disabled) return;
        els.useExamCodesCheckbox.checked = true;
        els.useExamCodesCheckbox.dispatchEvent(new Event('change', { bubbles: true }));
      });
      if (els.examModeExitBtn) els.examModeExitBtn.addEventListener('click', () => {
        if (!els.useExamCodesCheckbox) return;
        els.useExamCodesCheckbox.checked = false;
        els.useExamCodesCheckbox.dispatchEvent(new Event('change', { bubbles: true }));
        setTimeout(() => {
          if (typeof window.mvipOpenIntroCheckModal === 'function') window.mvipOpenIntroCheckModal();
        }, 0);
      });
      if (els.useExamCodesCheckbox) els.useExamCodesCheckbox.addEventListener('change', () => {
        const mon = normMonKey(state.currentMon || '');
        const available = availableExamConfigs(mon);
        const cfg = currentExamConfig();
        if (!mon || !available.length || !hasValidExamConfig(cfg)) {
          els.useExamCodesCheckbox.checked = false;
          renderCurrentBoard();
          return;
        }
        if (!selectedExamNoForMon(mon)) setSelectedExamNoForMon(mon, available[0].examNo);
        resetExamPreviewDone();
        if (!els.useExamCodesCheckbox.checked) state.questionFrozen = false;
        setExamModePreference(mon, !!els.useExamCodesCheckbox.checked);
        renderCurrentBoard();
      });

      if (els.examSerialSelect) els.examSerialSelect.addEventListener('change', () => {
        const mon = normMonKey(state.currentMon || '');
        if (!mon) return;
        resetExamPreviewDone();
        state.questionFrozen = false;
        setSelectedExamNoForMon(mon, els.examSerialSelect.value || 0);
        renderCurrentBoard();
      });

      if (els.examDoneBtn) els.examDoneBtn.addEventListener('click', () => {
        try {
          finishAutoExamPreview();
        } catch (error) {
          showLoginStatus(error.message || 'Không thể chốt hiển thị câu hiện tại.', 'err');
          renderCurrentBoard();
        }
      });

      els.resultSaveBtn.addEventListener('click', async () => {
        if (guardLimitedAccount('save')) return;
        const pending = state.pendingResult;
        if (!pending) return;
        try {
          els.resultSaveBtn.disabled = true;
          if (pending.wordPresentation && typeof window.wordPresentationSavePendingResult === 'function') {
            await window.wordPresentationSavePendingResult(pending);
          } else if (pending.regularTest) {
            await saveAndAdvanceRegularTestQuestion(pending.correct);
          } else {
            await saveCurrentQuestion(pending.correct);
            closeResultDialog();
          }
        } catch (error) {
          showLoginStatus('Lưu kết quả không thành công: ' + error.message, 'err');
        } finally {
          els.resultSaveBtn.disabled = false;
        }
      });
      els.resultRepickBtn.addEventListener('click', () => {
        const pending = state.pendingResult;
        if (pending && pending.wordPresentation) {
          if (typeof window.wordPresentationRepickPendingResult === 'function') window.wordPresentationRepickPendingResult(pending);
          return;
        }
        if (pending && pending.regularTest) {
          beginRegularTestRepick(pending);
          return;
        }
        state.selectedCorrect = '';
        state.revealAnswers = true;
        state.questionFrozen = true;
        closeResultDialog();
        renderCurrentBoard();
      });
      els.resultCancelBtn.addEventListener('click', () => {
        if (state.pendingResult && state.pendingResult.wordPresentation
          && typeof window.wordPresentationCancelPendingResult === 'function') {
          window.wordPresentationCancelPendingResult(state.pendingResult);
          return;
        }
        if (state.pendingResult && state.pendingResult.regularTest) {
          cancelAndAdvanceRegularTestQuestion();
          return;
        }
        clearCurrentQuestion();
        closeResultDialog();
        renderCurrentBoard();
        updateTopStats();
      });
      if (els.regularTestStartBtn) els.regularTestStartBtn.addEventListener('click', async () => {
        if (guardLimitedAccount('feature')) return;
        const oldText = els.regularTestStartBtn.textContent;
        try {
          els.regularTestStartBtn.disabled = true;
          els.regularTestStartBtn.textContent = 'Đang mở...';
          await openRegularTestModal();
        } catch (error) {
          const message = error && error.message ? error.message : 'Không mở được câu hỏi của Mvip.';
          setRegularTestStatus(els.regularTestRunStatus, message, 'err');
          showLoginStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          if (els.regularTestStartBtn && !isRegularTestSessionActive()) {
            els.regularTestStartBtn.textContent = oldText || 'Dùng câu hỏi của Mvip';
          }
          updateRegularTestStartButton();
        }
      });
      if (els.regularTestChoiceCloseBtn) els.regularTestChoiceCloseBtn.addEventListener('click', closeRegularTestChoiceModal);
      if (els.regularTestChoiceModal) els.regularTestChoiceModal.addEventListener('click', (event) => {
        const isBusy = !!(els.regularTestChoiceMvipBtn && els.regularTestChoiceMvipBtn.disabled);
        if (!isBusy && event.target && event.target.getAttribute('data-regular-choice-close') === '1') closeRegularTestChoiceModal();
      });
      if (els.regularTestSampleOpenBtn) els.regularTestSampleOpenBtn.addEventListener('click', openRegularTestSampleModal);
      if (els.regularTestSampleCloseBtn) els.regularTestSampleCloseBtn.addEventListener('click', closeRegularTestSampleModal);
      if (els.regularTestSampleModal) els.regularTestSampleModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-regular-sample-close') === '1') closeRegularTestSampleModal();
      });
      if (els.regularTestChoiceMvipBtn) els.regularTestChoiceMvipBtn.addEventListener('click', async () => {
        if (guardLimitedAccount('feature')) return;
        const oldText = els.regularTestChoiceMvipBtn.textContent;
        const oldCloseDisabled = els.regularTestChoiceCloseBtn ? !!els.regularTestChoiceCloseBtn.disabled : false;
        try {
          els.regularTestChoiceMvipBtn.disabled = true;
          els.regularTestChoiceLocalBtn && (els.regularTestChoiceLocalBtn.disabled = true);
          if (els.regularTestChoiceCloseBtn) els.regularTestChoiceCloseBtn.disabled = true;
          els.regularTestChoiceMvipBtn.textContent = 'Đang mở...';
          setRegularTestChoiceStatus('Đang tải danh mục bài, chưa tải nội dung câu hỏi...', '');
          await openRegularTestModal();
          setRegularTestChoiceStatus('Đã tải danh mục bài. Đang mở bảng Soạn câu hỏi...', 'ok');
          closeRegularTestChoiceModal();
        } catch (error) {
          const message = error && error.message ? error.message : 'Không mở được câu hỏi của Mvip.';
          setRegularTestChoiceStatus(message, 'err');
          setRegularTestStatus(els.regularTestRunStatus, message, 'err');
          showLoginStatus(message, 'err');
        } finally {
          if (els.regularTestChoiceMvipBtn) {
            els.regularTestChoiceMvipBtn.disabled = false;
            els.regularTestChoiceMvipBtn.textContent = oldText || 'Dùng câu hỏi của Mvip';
          }
          if (els.regularTestChoiceLocalBtn) els.regularTestChoiceLocalBtn.disabled = false;
          if (els.regularTestChoiceCloseBtn) els.regularTestChoiceCloseBtn.disabled = oldCloseDisabled;
          updateRegularTestStartButton();
        }
      });
      if (els.regularTestChoiceLocalBtn && els.regularTestLocalFileInput) els.regularTestChoiceLocalBtn.addEventListener('click', () => {
        try {
          els.regularTestLocalFileInput.value = '';
          setRegularTestChoiceStatus('Chọn file Word/txt chứa câu trắc nghiệm.', '');
        } catch (_) {}
        if (typeof els.regularTestLocalFileInput.showPicker === 'function') {
          try { els.regularTestLocalFileInput.showPicker(); return; } catch (_) {}
        }
        els.regularTestLocalFileInput.click();
      });
      if (els.regularTestLocalFileInput) els.regularTestLocalFileInput.addEventListener('change', async () => {
        const file = els.regularTestLocalFileInput.files && els.regularTestLocalFileInput.files[0];
        try {
          if (!file) return;
          if (els.regularTestChoiceLocalBtn) els.regularTestChoiceLocalBtn.disabled = true;
          if (els.regularTestChoiceMvipBtn) els.regularTestChoiceMvipBtn.disabled = true;
          await beginRegularTestFromLocalFile(file);
        } catch (error) {
          const message = error && error.message ? error.message : 'Không đọc được file câu hỏi.';
          setRegularTestChoiceStatus(message, 'err');
          showLoginStatus(message, 'err');
          openAlertModal(message, 'Thông báo');
        } finally {
          if (els.regularTestLocalFileInput) els.regularTestLocalFileInput.value = '';
          if (els.regularTestChoiceLocalBtn) els.regularTestChoiceLocalBtn.disabled = false;
          if (els.regularTestChoiceMvipBtn) els.regularTestChoiceMvipBtn.disabled = false;
          updateRegularTestStartButton();
        }
      });
      if (els.regularTestCloseBtn) els.regularTestCloseBtn.addEventListener('click', closeRegularTestModal);
      if (els.regularTestModal) els.regularTestModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-regular-test-close') === '1') closeRegularTestModal();
      });
      if (els.regularTestBankSelect) els.regularTestBankSelect.addEventListener('change', () => {
        if (els.cv7991QuestionBankSelect) els.cv7991QuestionBankSelect.value = els.regularTestBankSelect.value;
      });
      if (els.regularTestLoadBankBtn) els.regularTestLoadBankBtn.addEventListener('click', async () => {
        const oldText = els.regularTestLoadBankBtn.textContent;
        try {
          els.regularTestLoadBankBtn.disabled = true;
          els.regularTestLoadBankBtn.textContent = 'Đang nạp...';
          await loadRegularTestBank();
        } catch (error) {
          setRegularTestStatus(els.regularTestBankStatus, error.message || 'Không nạp được ngân hàng đề.', 'err');
        } finally {
          els.regularTestLoadBankBtn.disabled = false;
          els.regularTestLoadBankBtn.textContent = oldText;
        }
      });
      if (els.regularTestOpenMatrixBtn) els.regularTestOpenMatrixBtn.addEventListener('click', () => {
        try { openRegularTestMatrixEditor(); }
        catch (error) { setRegularTestStatus(els.regularTestRunStatus, error.message || 'Không mở được giao diện soạn câu hỏi.', 'err'); }
      });
      if (els.regularTestQuestionTable) {
        const onRegularQuestionChange = (event) => {
          const input = event.target && event.target.closest ? event.target.closest('.regular-question-input') : null;
          if (!input) return;
          syncRegularTestQuestionInput(input);
          recalcCv7991Matrix();
          updateRegularTestGui();
        };
        els.regularTestQuestionTable.addEventListener('input', onRegularQuestionChange);
        els.regularTestQuestionTable.addEventListener('change', onRegularQuestionChange);
      }
      if (els.regularTestQuestionResetBtn) els.regularTestQuestionResetBtn.addEventListener('click', resetRegularTestQuestionEditor);
      if (els.regularTestQuestionCloseBtn) els.regularTestQuestionCloseBtn.addEventListener('click', closeRegularTestQuestionEditor);
      if (els.regularTestNoBankCloseBtn) els.regularTestNoBankCloseBtn.addEventListener('click', closeRegularTestNoBankModal);
      if (els.regularTestNoBankModal) els.regularTestNoBankModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-regular-nobank-close') === '1') closeRegularTestNoBankModal();
      });
      if (els.regularTestQuestionSaveBtn) els.regularTestQuestionSaveBtn.addEventListener('click', async () => {
        const oldText = els.regularTestQuestionSaveBtn.textContent;
        try {
          els.regularTestQuestionSaveBtn.disabled = true;
          els.regularTestQuestionSaveBtn.textContent = 'Đang sinh đề...';
          await generateRegularTestFromQuestionEditor();
        } catch (error) {
          if (els.regularTestQuestionModal) els.regularTestQuestionModal.hidden = false;
          if (els.regularTestModal) els.regularTestModal.hidden = true;
          setRegularTestStatus(els.regularTestRunStatus, error.message || 'Không thể sinh đề kiểm tra thường xuyên.', 'err');
          showLoginStatus(error.message || 'Không thể sinh đề kiểm tra thường xuyên.', 'err');
          openAlertModal(error.message || 'Không thể sinh đề kiểm tra thường xuyên.', 'Thông báo');
        } finally {
          if (els.regularTestQuestionSaveBtn) {
            els.regularTestQuestionSaveBtn.textContent = oldText || 'Sinh đề';
            updateRegularTestGui();
          }
        }
      });
      if (els.regularTestBeginBtn) els.regularTestBeginBtn.addEventListener('click', async () => {
        const oldText = els.regularTestBeginBtn.textContent;
        try {
          els.regularTestBeginBtn.disabled = true;
          els.regularTestBeginBtn.textContent = 'Đang chuẩn bị...';
          await beginRegularTest();
        } catch (error) {
          setRegularTestStatus(els.regularTestRunStatus, error.message || 'Không thể sinh đề kiểm tra thường xuyên.', 'err');
        } finally {
          els.regularTestBeginBtn.disabled = false;
          els.regularTestBeginBtn.textContent = oldText;
        }
      });
      if (els.regularTestPrevBtn) els.regularTestPrevBtn.addEventListener('click', () => {
        try {
          const oldIndex = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
          gotoRegularTestQuestion(oldIndex - 1);
          const newIndex = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
          if (newIndex !== oldIndex) restartSingleExamCountdownAfterQuestionChange();
        } catch (error) {
          showLoginStatus(error.message || 'Không chuyển được về câu trước.', 'err');
        }
      });
      if (els.regularTestNextBtn) els.regularTestNextBtn.addEventListener('click', () => {
        try {
          const oldIndex = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
          gotoRegularTestQuestion(oldIndex + 1);
          const newIndex = parseInt(String(state.regularTestSession.index || 0), 10) || 0;
          if (newIndex === oldIndex) return;

          // Mũi tên phải chỉ chuyển câu; giữ nguyên chế độ cửa sổ/toàn màn hình.
          // Đồng hồ chỉ tự chạy lại nếu người dùng đã ở toàn màn hình.
          restartSingleExamCountdownAfterQuestionChange();
        } catch (error) {
          showLoginStatus(error.message || 'Không chuyển được sang câu sau.', 'err');
        }
      });
      if (els.singleExamNextBtn) els.singleExamNextBtn.addEventListener('click', async () => {
        try {
          els.singleExamNextBtn.disabled = true;
          await nextRegularTestQuestion();
        } catch (error) {
          showLoginStatus(error.message || 'Không thể chuyển câu.', 'err');
        } finally {
          renderRegularTestPresenter();
        }
      });
      if (els.singleExamClassSelect) els.singleExamClassSelect.addEventListener('change', () => {
        try { selectSingleExamClass(els.singleExamClassSelect.value || ''); }
        catch (error) { showLoginStatus(error.message || 'Không thể đổi Lớp-Môn.', 'err'); }
      });
      if (els.singleExamAnswerBtn) els.singleExamAnswerBtn.addEventListener('click', (event) => {
        try { toggleRegularTestAnswerView(event); }
        catch (error) { showLoginStatus(error.message || 'Không thể xem đáp án.', 'err'); }
      });
      if (els.singleExamViewBtn) els.singleExamViewBtn.addEventListener('click', () => {
        try { previewRegularTestQuestion(); }
        catch (error) { showLoginStatus(error.message || 'Không thể xem kết quả.', 'err'); }
      });
      if (els.singleExamToolbarGuideBtn) els.singleExamToolbarGuideBtn.addEventListener('click', openSingleExamGuide);
      if (els.singleExamGuideBtn) els.singleExamGuideBtn.addEventListener('click', openSingleExamGuide);
      if (els.singleExamGuideCloseBtn) els.singleExamGuideCloseBtn.addEventListener('click', () => {
        closeSingleExamGuide();
        // Nút Đóng của bảng Hướng dẫn đồng thời thực hiện đúng tác dụng của nút Thoát toàn màn hình.
        exitSingleExamFullscreen();
      });
      if (els.singleExamGuideDragHandle) {
        els.singleExamGuideDragHandle.addEventListener('pointerdown', beginSingleExamGuideDrag);
        els.singleExamGuideDragHandle.addEventListener('pointermove', moveSingleExamGuideDrag);
        els.singleExamGuideDragHandle.addEventListener('pointerup', endSingleExamGuideDrag);
        els.singleExamGuideDragHandle.addEventListener('pointercancel', endSingleExamGuideDrag);
        els.singleExamGuideDragHandle.addEventListener('lostpointercapture', endSingleExamGuideDrag);
      }
      if (els.singleExamGuideModal) els.singleExamGuideModal.addEventListener('click', (event) => {
        if (event.target && event.target.getAttribute('data-single-exam-guide-close') === '1') closeSingleExamGuide();
      });
      if (els.singleExamCloseBtn) els.singleExamCloseBtn.addEventListener('click', () => stopRegularTestPresenter(false));
      if (els.singleExamCountdownInput) {
        const interruptCountdown = () => {
          if (!singleExamCountdownEndAt) return;
          stopSingleExamCountdown(true);
          // Clear the selection so choosing the same duration also restarts it.
          els.singleExamCountdownInput.value = '';
        };
        els.singleExamCountdownInput.addEventListener('pointerdown', (event) => {
          if (event.button === 0) interruptCountdown();
          // Keep the native select action so this same press opens its options.
        });
        els.singleExamCountdownInput.addEventListener('keydown', (event) => {
          if ([' ', 'Enter', 'ArrowDown', 'ArrowUp', 'Home', 'End'].includes(event.key)
            || /^[0-9]$/.test(event.key)) interruptCountdown();
        });
        els.singleExamCountdownInput.addEventListener('change', () => {
          const seconds = readSingleExamCountdownSeconds();
          stopSingleExamCountdown(false);
          if (seconds > 0 && singleExamIsFullscreen()) startSingleExamCountdown(seconds);
        });
      }
      if (els.singleExamFullscreenBtn) els.singleExamFullscreenBtn.addEventListener('click', toggleSingleExamFullscreen);
      if (els.singleExamRegionBtn) els.singleExamRegionBtn.addEventListener('click', toggleSingleExamRegionTool);
      if (els.singleExamPresenter) {
        els.singleExamPresenter.addEventListener('click', (event) => {
          if (regularTestWordHandleDirectImageZoom(event)) return;
          const target = event.target instanceof Element ? event.target : null;
          if (!target) return;
          const tfScanButton = target.closest('[data-regular-tf-scan]');
          if (tfScanButton) {
            regularTestBeginTfScan(tfScanButton.getAttribute('data-regular-tf-scan') || '');
            event.preventDefault();
            event.stopPropagation();
            return;
          }
          const tfChoiceButton = target.closest('.cv7991-tf-choice-btn[data-tf-choice]');
          if (tfChoiceButton) {
            const row = tfChoiceButton.closest('.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]');
            if (row) regularTestSetManualTfChoice(row, tfChoiceButton.getAttribute('data-tf-choice') || '', event);
            return;
          }
          const checkButton = target.closest('.cv7991-choice-check-btn');
          if (checkButton) {
            const row = checkButton.closest('.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]');
            if (row) regularTestToggleManualSelectionRow(row, event);
            return;
          }
          if (target.closest('button, a, input, select, textarea, label')) return;
          const row = target.closest('.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]');
          if (row) {
            regularTestToggleManualSelectionRow(row, event);
            return;
          }

          /* Bấm chuột trái vào vùng trống của câu hỏi Mvip để chuyển câu.
             Không chạy khi đang dùng bút, công cụ hình học, Quét vùng hoặc khi
             có một bảng chức năng khác đang mở trên màn chiếu. */
          const inkApi = window.mvipSingleExamInkTool;
          const geometryApi = window.mvipSingleExamGeometryTool;
          const inkActive = !!(inkApi && typeof inkApi.isActive === 'function' && inkApi.isActive());
          const geometryActive = !!(geometryApi && typeof geometryApi.tool === 'function' && geometryApi.tool());
          const overlayOpen = !!document.querySelector(
            '#singleExamGuideModal:not([hidden]), #wordPresentationImageZoomModal:not([hidden]), '
            + '#cv7991MagicWheelModal:not([hidden]), #mvipWhiteboardPanel:not([hidden]), '
            + '.single-exam-region-overlay, .single-exam-region-zoom-pane'
          );
          if ((typeof event.button !== 'number' || event.button === 0)
            && target.closest('#singleExamSlide')
            && !inkActive && !geometryActive && !overlayOpen) {
            const session = state.regularTestSession || {};
            const oldIndex = parseInt(String(session.index || 0), 10) || 0;
            const total = Array.isArray(session.slides) ? session.slides.length : 0;
            if (oldIndex < total - 1) {
              event.preventDefault();
              event.stopPropagation();
              gotoRegularTestQuestion(oldIndex + 1);
              restartSingleExamCountdownAfterQuestionChange();
            }
          }
        });
        els.singleExamPresenter.addEventListener('keydown', (event) => {
          if (!['Enter', ' '].includes(event.key)) return;
          if (regularTestWordHandleDirectImageZoom(event)) return;
          const target = event.target instanceof Element ? event.target : null;
          if (target && target.closest('.cv7991-choice-check-btn, .cv7991-tf-choice-btn')) return;
          const row = target && target.closest('.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]');
          if (row) regularTestToggleManualSelectionRow(row, event);
        });
      }
      /* Bộ điều hướng bàn phím dùng chung cho Dùng câu hỏi của Mvip. Chạy ở
         pha capture để phím mũi tên vẫn được nhận khi tiêu điểm còn nằm trên
         một nút của thanh công cụ; Enter/Space trên chính nút vẫn giữ tác dụng
         mặc định của nút đó. */
      document.addEventListener('keydown', (event) => {
        if (!els.singleExamPresenter || els.singleExamPresenter.hidden) return;
        const keys = [
          'ArrowRight', 'ArrowDown', 'PageDown', 'ArrowLeft', 'ArrowUp',
          'PageUp', 'Backspace', 'Home', 'End', 'Enter', ' '
        ];
        if (!keys.includes(event.key) || event.repeat || event.isComposing
          || event.ctrlKey || event.metaKey || event.altKey) return;
        const target = event.target instanceof Element ? event.target : null;
        if (target && target.closest('input, textarea, select, [contenteditable="true"]')) return;
        if (target && target.closest('button, a, audio, video') && ['Enter', ' '].includes(event.key)) return;
        if ((els.singleExamGuideModal && !els.singleExamGuideModal.hidden)
          || (els.resultModal && !els.resultModal.hidden)
          || document.body.classList.contains('mvip-whiteboard-open')
          || document.querySelector(
            '#wordPresentationImageZoomModal:not([hidden]), #cv7991MagicWheelModal:not([hidden]), '
            + '.single-exam-region-overlay, .single-exam-region-zoom-pane'
          )) return;

        const session = state.regularTestSession || {};
        const total = Array.isArray(session.slides) ? session.slides.length : 0;
        if (!total) return;
        const oldIndex = parseInt(String(session.index || 0), 10) || 0;
        let nextIndex = oldIndex;
        if (['ArrowRight', 'ArrowDown', 'PageDown', 'Enter', ' '].includes(event.key)) {
          nextIndex = Math.min(total - 1, oldIndex + 1);
        } else if (['ArrowLeft', 'ArrowUp', 'PageUp', 'Backspace'].includes(event.key)) {
          nextIndex = Math.max(0, oldIndex - 1);
        } else if (event.key === 'Home') {
          nextIndex = 0;
        } else if (event.key === 'End') {
          nextIndex = total - 1;
        }
        if (nextIndex === oldIndex) return;
        event.preventDefault();
        event.stopImmediatePropagation();
        gotoRegularTestQuestion(nextIndex);
        restartSingleExamCountdownAfterQuestionChange();
      }, true);
      document.addEventListener('keydown', (event) => {
        if (event.key !== 'Escape' || !els.singleExamPresenter || els.singleExamPresenter.hidden) return;
        const api = regularTestWordImageZoomApi();
        if (!api || typeof api.isImageZoomOpen !== 'function' || !api.isImageZoomOpen()) return;
        event.preventDefault();
        event.stopPropagation();
        regularTestWordCloseDirectImageZoom();
      }, true);
      document.addEventListener('fullscreenchange', handleSingleExamFullscreenChange);
      document.addEventListener('webkitfullscreenchange', handleSingleExamFullscreenChange);
      window.addEventListener('resize', updateCompactView);
      window.addEventListener('resize', scheduleRegularTestWordFullscreenTransitionFit);
      window.addEventListener('resize', () => requestAnimationFrame(clampSingleExamGuidePosition));
      document.addEventListener('fullscreenchange', () => requestAnimationFrame(clampSingleExamGuidePosition));
      document.addEventListener('webkitfullscreenchange', () => requestAnimationFrame(clampSingleExamGuidePosition));
    }

    if (els.fontSizeSelect) els.fontSizeSelect.value = String(state.fontSize);
    if (els.examFontSizeSelect) els.examFontSizeSelect.value = String(state.fontSize);
    if (els.columnCountSelect) els.columnCountSelect.value = String(state.columnCount);
    if (els.examColumnCountSelect) els.examColumnCountSelect.value = String(state.examColumnCount);
    bindEvents();
    updateCompactView();
    setAuthUi(false);
    setWsUi(false, 'Realtime chưa kết nối');
    updateReportFilterUi();
    updateReportExportButton();
    renderReportPlaceholder('Đăng nhập, chọn đúng Lớp-Môn, rồi bấm <b>Kết quả</b> để mở bảng thống kê.');
    renderAll();
    restoreFromStorage();
</script>
<script>
    (function () {
      const STORE_LINKS = {
        APP_STORE_URL: '#',
        PLAY_STORE_URL: '#',
        PC_SETUP_URL: 'https://mvip.vn/downloads/Mvip_Setup.exe'
      };

      function applyDownloadLink(id, url) {
        const el = document.getElementById(id);
        if (!el) return;
        if (url && url !== '#') {
          el.href = url;
          el.target = '_blank';
          el.rel = 'noopener noreferrer';
        } else {
          el.href = '#lienhe';
          el.title = 'Bạn hãy thay link thật trong phần JavaScript của file này.';
        }
      }

      applyDownloadLink('pcDownloadBtn', STORE_LINKS.PC_SETUP_URL);
      applyDownloadLink('androidDownloadBtn', STORE_LINKS.PLAY_STORE_URL);
      applyDownloadLink('iosDownloadBtn', STORE_LINKS.APP_STORE_URL);

      const registerForm = document.getElementById('registerForm');
      const registerSubmitBtn = document.getElementById('registerSubmitBtn');
      const registerEmailInput = document.getElementById('reg_email');
      const registerEmailCheckStatus = document.getElementById('registerEmailCheckStatus');
      const registerUsernameInput = document.getElementById('reg_username');
      const registerPasswordToggles = Array.from(document.querySelectorAll('.password-toggle[data-password-target]'));
      const registerNoticeModal = document.getElementById('registerNoticeModal');
      const registerNoticeDialog = document.getElementById('registerNoticeDialog');
      const registerNoticeIcon = document.getElementById('registerNoticeIcon');
      const registerNoticeTitle = document.getElementById('registerNoticeTitle');
      const registerNoticeMessage = document.getElementById('registerNoticeMessage');
      const registerNoticeOkBtn = document.getElementById('registerNoticeOkBtn');
      const registerNoticeCloseButtons = Array.from(document.querySelectorAll('[data-register-notice-close]'));
      let registerNoticeReturnFocus = null;

      const MAJOR_EMAIL_PROVIDER_DOMAINS = new Set([
        'gmail.com', 'googlemail.com',
        'outlook.com', 'hotmail.com', 'live.com', 'msn.com',
        'icloud.com', 'me.com', 'mac.com',
        'yahoo.com', 'myyahoo.com',
        'proton.me', 'protonmail.com', 'protonmail.ch', 'pm.me',
        'zohomail.com'
      ]);
      const TRUSTED_REGISTRATION_SUFFIXES = Object.freeze(['edu.vn', 'gov.vn']);
      let registerEmailCheckSequence = 0;

      function syncRegisterUsername() {
        if (!registerUsernameInput) return;
        // Giữ nguyên chữ hoa/chữ thường của email; chỉ bỏ khoảng trắng hai đầu.
        registerUsernameInput.value = String((registerEmailInput && registerEmailInput.value) || '')
          .trim();
      }

      function setRegisterPasswordVisibility(button, visible) {
        if (!button) return;
        const input = document.getElementById(button.dataset.passwordTarget || '');
        if (!input) return;

        input.type = visible ? 'text' : 'password';
        button.classList.toggle('is-visible', visible);
        button.setAttribute('aria-pressed', visible ? 'true' : 'false');

        const isConfirm = input.id === 'reg_password2';
        const label = visible
          ? (isConfirm ? 'Ẩn mật khẩu nhập lại' : 'Ẩn mật khẩu')
          : (isConfirm ? 'Hiện mật khẩu nhập lại' : 'Hiện mật khẩu');
        button.setAttribute('aria-label', label);
        button.title = label;
      }

      function resetRegisterPasswordVisibility() {
        registerPasswordToggles.forEach((button) => setRegisterPasswordVisibility(button, false));
      }

      function openRegisterNotice(options) {
        if (!registerNoticeModal || !registerNoticeDialog || !registerNoticeMessage) return;

        const settings = options || {};
        const type = settings.type === 'err' ? 'error' : (settings.type === 'ok' ? 'success' : 'info');
        registerNoticeDialog.classList.remove('is-success', 'is-error', 'is-info');
        registerNoticeDialog.classList.add('is-' + type);
        const verification = type === 'success' && !!settings.email;
        registerNoticeDialog.classList.toggle('is-verification', verification);
        registerNoticeModal.classList.toggle('is-verification', verification);

        if (registerNoticeTitle) {
          registerNoticeTitle.textContent = settings.title || (type === 'error' ? 'Không thể đăng ký' : 'Thông báo');
        }
        if (registerNoticeIcon) {
          registerNoticeIcon.textContent = type === 'success' ? '✓' : (type === 'error' ? '!' : 'i');
        }

        registerNoticeMessage.replaceChildren();
        if (verification) {
          const emphasis = (text, className = '') => {
            const element = document.createElement('strong');
            element.textContent = text;
            if (className) element.className = className;
            return element;
          };
          const steps = document.createElement('ol');
          steps.className = 'register-notice-steps';
          const emailStep = document.createElement('li');
          emailStep.append('Mở hộp thư của email ',
            emphasis(String(settings.email), 'register-notice-email'), '.');
          const findStep = document.createElement('li');
          findStep.append('Tìm thư có tiêu đề ', emphasis('“Xác thực đăng ký MVIP”'),
            ' trong ', emphasis('Hộp thư đến', 'register-notice-folder'),
            '. Nếu chưa thấy, hãy kiểm tra ', emphasis('Thư rác (Spam)', 'register-notice-folder'), '.');
          const verifyStep = document.createElement('li');
          verifyStep.append('Mở thư và ', emphasis('bấm vào liên kết trong thư'),
            ' để kích hoạt tài khoản.');
          steps.append(emailStep, findStep, verifyStep);
          registerNoticeMessage.appendChild(steps);
        } else {
          registerNoticeMessage.textContent = settings.message || '';
        }

        registerNoticeReturnFocus = document.activeElement instanceof HTMLElement
          ? document.activeElement
          : null;
        registerNoticeModal.hidden = false;
        document.body.classList.add('register-notice-open');
        registerNoticeMessage.scrollTop = 0;
        window.setTimeout(() => registerNoticeOkBtn && registerNoticeOkBtn.focus(), 0);
      }

      function closeRegisterNotice(restoreFocus = true) {
        if (!registerNoticeModal) return;
        registerNoticeModal.hidden = true;
        document.body.classList.remove('register-notice-open');
        if (restoreFocus && registerNoticeReturnFocus && document.contains(registerNoticeReturnFocus)) {
          registerNoticeReturnFocus.focus();
        }
        registerNoticeReturnFocus = null;
      }

      function registerShowStatus(message, type) {
        openRegisterNotice({
          type: type || 'info',
          title: type === 'err' ? 'Thông tin chưa hợp lệ' : 'Thông báo',
          message: message || ''
        });
      }

      function registerShowSuccess(email) {
        openRegisterNotice({
          type: 'ok',
          title: 'Vui lòng xác thực email để hoàn tất đăng ký',
          email: email
        });
      }

      function registerResetStatus() {
        closeRegisterNotice(false);
      }

      function setRegisterEmailCheckStatus(state, message) {
        if (!registerEmailCheckStatus) return;
        registerEmailCheckStatus.dataset.state = state || 'idle';
        registerEmailCheckStatus.textContent = String(message || '');
      }

      function parseRegistrationEmail(email) {
        const value = String(email || '').trim();
        if (!value || value.length > 254) return { valid:false, value, reason:'format' };
        const match = value.match(/^([A-Za-z0-9.!#$%&'*+/=?^_`{|}~-]+)@([A-Za-z0-9-]+(?:\.[A-Za-z0-9-]+)+)$/);
        if (!match) return { valid:false, value, reason:'format' };

        const localPart = String(match[1] || '');
        const domain = String(match[2] || '').toLowerCase();
        const labels = domain.split('.');
        if (!localPart || localPart.length > 64 || localPart.startsWith('.') || localPart.endsWith('.') || localPart.includes('..')) {
          return { valid:false, value, reason:'format' };
        }
        if (domain.length > 253 || labels.some((label) => !label || label.length > 63 || label.startsWith('-') || label.endsWith('-'))) {
          return { valid:false, value, reason:'format' };
        }
        return { valid:true, value, localPart, domain };
      }

      function isValidEmail(email) {
        return parseRegistrationEmail(email).valid;
      }

      function domainMatchesSuffix(domain, suffix) {
        return domain === suffix || domain.endsWith('.' + suffix);
      }

      function classifyRegistrationEmailDomain(domain) {
        const normalized = String(domain || '').trim().toLowerCase();
        if (MAJOR_EMAIL_PROVIDER_DOMAINS.has(normalized)) return 'major';
        if (domainMatchesSuffix(normalized, TRUSTED_REGISTRATION_SUFFIXES[0])) return 'education';
        if (domainMatchesSuffix(normalized, TRUSTED_REGISTRATION_SUFFIXES[1])) return 'government';
        return 'unsupported';
      }

      function allowedRegistrationEmailDomainsMessage() {
        return 'Chỉ chấp nhận email thuộc các nhà cung cấp: gmail.com, googlemail.com, outlook.com, hotmail.com, live.com, msn.com, icloud.com, me.com, mac.com, yahoo.com, myyahoo.com, proton.me, protonmail.com, protonmail.ch, pm.me, zohomail.com; hoặc tên miền edu.vn/gov.vn và các tên miền con của chúng.';
      }

      async function validateRegistrationEmailPolicy(email) {
        const parsed = parseRegistrationEmail(email);
        if (!parsed.valid) {
          return {
            ok:false,
            code:'format',
            message:'Email không đúng định dạng. Ví dụ: ten@gmail.com, ten@truong.edu.vn hoặc ten@donvi.gov.vn.'
          };
        }

        const category = classifyRegistrationEmailDomain(parsed.domain);
        if (category === 'major') {
          return {
            ok:true,
            code:'allowed_major_provider',
            category,
            domain:parsed.domain,
            message:'Tên miền ' + parsed.domain + ' thuộc danh sách nhà cung cấp email được phép.'
          };
        }
        if (category === 'education') {
          return {
            ok:true,
            code:'allowed_education_domain',
            category,
            domain:parsed.domain,
            message:'Tên miền ' + parsed.domain + ' thuộc hệ thống edu.vn được phép đăng ký.'
          };
        }
        if (category === 'government') {
          return {
            ok:true,
            code:'allowed_government_domain',
            category,
            domain:parsed.domain,
            message:'Tên miền ' + parsed.domain + ' thuộc hệ thống gov.vn được phép đăng ký.'
          };
        }

        return {
          ok:false,
          code:'domain_not_allowed',
          category,
          domain:parsed.domain,
          message:'Tên miền ' + parsed.domain + ' không được phép đăng ký. ' + allowedRegistrationEmailDomainsMessage()
        };
      }

      async function previewRegistrationEmailPolicy() {
        const email = String((registerEmailInput && registerEmailInput.value) || '').trim();
        const sequence = ++registerEmailCheckSequence;
        if (!email) {
          if (registerEmailInput) registerEmailInput.setCustomValidity('');
          setRegisterEmailCheckStatus('idle', '');
          return;
        }
        if (!isValidEmail(email)) {
          if (registerEmailInput) registerEmailInput.setCustomValidity('Email chưa đúng định dạng.');
          setRegisterEmailCheckStatus('error', 'Email chưa đúng định dạng.');
          return;
        }
        setRegisterEmailCheckStatus('checking', 'Đang kiểm tra chính sách email...');
        const result = await validateRegistrationEmailPolicy(email);
        if (sequence !== registerEmailCheckSequence) return;
        if (registerEmailInput) registerEmailInput.setCustomValidity(result.ok ? '' : result.message);
        setRegisterEmailCheckStatus(result.ok ? 'ok' : 'error', result.message);
      }

      async function submitRegisterForm(event) {
        event.preventDefault();
        registerResetStatus();

        const registerEmail = String((registerEmailInput && registerEmailInput.value) || '').trim();
        if (registerUsernameInput) registerUsernameInput.value = registerEmail;

        const payload = {
          full_name: (document.getElementById('reg_full_name') || {}).value?.trim?.() || '',
          phone: (document.getElementById('reg_phone') || {}).value?.trim?.() || '',
          email: registerEmail,
          // Gửi kèm để tương thích server cũ; server mới luôn tự đặt username = email.
          username: registerEmail,
          password: (document.getElementById('reg_password') || {}).value || '',
          password2: (document.getElementById('reg_password2') || {}).value || ''
        };

        if (!payload.full_name || !payload.phone || !payload.email || !payload.password || !payload.password2) {
          registerShowStatus('Bạn cần nhập đủ: Họ và tên, Điện thoại, Email, Mật khẩu và Nhập lại mật khẩu.', 'err');
          return;
        }
        if (!isValidEmail(payload.email)) {
          registerShowStatus('Email không đúng định dạng. Ví dụ: ten@gmail.com, ten@truong.edu.vn hoặc ten@donvi.gov.vn.', 'err');
          setRegisterEmailCheckStatus('error', 'Email chưa đúng định dạng.');
          return;
        }
        if (payload.password !== payload.password2) {
          registerShowStatus('Mật khẩu nhập lại không khớp.', 'err');
          return;
        }
        if (payload.password.length < 6) {
          registerShowStatus('Mật khẩu tối thiểu 6 ký tự.', 'err');
          return;
        }

        try {
          if (registerSubmitBtn) {
            registerSubmitBtn.disabled = true;
            registerSubmitBtn.textContent = 'Đang kiểm tra email...';
          }
          setRegisterEmailCheckStatus('checking', 'Đang kiểm tra chính sách email...');
          const emailPolicy = await validateRegistrationEmailPolicy(payload.email);
          if (!emailPolicy.ok) {
            if (registerEmailInput) registerEmailInput.setCustomValidity(emailPolicy.message);
            setRegisterEmailCheckStatus('error', emailPolicy.message);
            registerShowStatus(emailPolicy.message, 'err');
            return;
          }
          if (registerEmailInput) registerEmailInput.setCustomValidity('');
          setRegisterEmailCheckStatus('ok', emailPolicy.message);

          if (registerSubmitBtn) registerSubmitBtn.textContent = 'Đang gửi...';
          /* Lưu ý bảo mật: API máy chủ cũng phải áp dụng đúng danh sách tên miền
             được phép; kiểm tra tại trình duyệt chỉ là lớp chặn sớm cho giao diện. */
          const response = await fetch('https://api.mvip.vn/api/register', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
          });

          let data = {};
          try { data = await response.json(); } catch (_) {}

          if (response.ok) {
            registerShowSuccess(registerEmail);
            registerForm.reset();
            syncRegisterUsername();
            resetRegisterPasswordVisibility();
            registerEmailCheckSequence += 1;
            setRegisterEmailCheckStatus('idle', '');
          } else {
            registerShowStatus((data && data.detail) ? data.detail : 'Đăng ký không thành công. Vui lòng thử lại.', 'err');
          }
        } catch (error) {
          registerShowStatus('Không thể hoàn tất kiểm tra hoặc không kết nối được server. ' + error, 'err');
        } finally {
          if (registerSubmitBtn) {
            registerSubmitBtn.disabled = false;
            registerSubmitBtn.textContent = 'Gửi đăng ký';
          }
        }
      }

      if (registerEmailInput) {
        registerEmailInput.addEventListener('input', () => {
          syncRegisterUsername();
          registerEmailCheckSequence += 1;
          const value = String(registerEmailInput.value || '').trim();
          registerEmailInput.setCustomValidity('');
          setRegisterEmailCheckStatus(
            'idle',
            value
              ? 'Rời ô email hoặc bấm Gửi đăng ký để kiểm tra tên miền được phép.'
              : ''
          );
        });
        registerEmailInput.addEventListener('change', syncRegisterUsername);
        registerEmailInput.addEventListener('blur', previewRegistrationEmailPolicy);
      }
      syncRegisterUsername();

      registerPasswordToggles.forEach((button) => {
        button.addEventListener('click', () => {
          const input = document.getElementById(button.dataset.passwordTarget || '');
          if (!input) return;
          const visible = input.type === 'password';
          setRegisterPasswordVisibility(button, visible);
          input.focus();
        });
      });

      registerNoticeCloseButtons.forEach((button) => {
        button.addEventListener('click', () => closeRegisterNotice(true));
      });
      if (registerNoticeOkBtn) {
        registerNoticeOkBtn.addEventListener('click', () => closeRegisterNotice(true));
      }
      document.addEventListener('keydown', (event) => {
        if (event.key === 'Escape' && registerNoticeModal && !registerNoticeModal.hidden) {
          closeRegisterNotice(true);
        }
      });

      if (registerForm) {
        registerForm.addEventListener('submit', submitRegisterForm);
      }
    })();
</script>
<script src="https://unpkg.com/mammoth/mammoth.browser.min.js"></script>
<script src="https://unpkg.com/jszip@3.10.1/dist/jszip.min.js"></script>
<script src="https://unpkg.com/docx@8.5.0/build/index.umd.js"></script>
<script>
window.MathJax = window.MathJax || { tex: { packages: {'[+]': ['ams', 'newcommand', 'boldsymbol', 'mathtools', 'physics', 'mhchem'] } }, svg: { fontCache: 'none' }, startup: { typeset: false } };
</script>
<script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-svg.js"></script>
<script src="https://unpkg.com/rtf.js@3.0.7/dist/WMFJS.bundle.min.js"></script>
<script>
/* Embedded EMF reader for MVIP Word presenter.
 * Implements the common vector/path/text records used by Office-generated EMF.
 * No network dependency. The public API mirrors rtf.js EMFJS.Renderer.
 */
(function (global) {
  'use strict';
  if (global.EMFJS && global.EMFJS.Renderer && global.EMFJS.__cv7991Embedded) return;

  const SVG_NS = 'http://www.w3.org/2000/svg';
  const XLINK_NS = 'http://www.w3.org/1999/xlink';
  let logging = false;

  const EMR = {
    HEADER: 1, POLYBEZIER: 2, POLYGON: 3, POLYLINE: 4, POLYBEZIERTO: 5, POLYLINETO: 6,
    POLYPOLYLINE: 7, POLYPOLYGON: 8, SETWINDOWEXTEX: 9, SETWINDOWORGEX: 10,
    SETVIEWPORTEXTEX: 11, SETVIEWPORTORGEX: 12, SETBRUSHORGEX: 13, EOF: 14,
    SETPIXELV: 15, SETMAPPERFLAGS: 16, SETMAPMODE: 17, SETBKMODE: 18,
    SETPOLYFILLMODE: 19, SETROP2: 20, SETSTRETCHBLTMODE: 21, SETTEXTALIGN: 22,
    SETTEXTCOLOR: 24, SETBKCOLOR: 25, OFFSETCLIPRGN: 26, MOVETOEX: 27,
    EXCLUDECLIPRECT: 29, INTERSECTCLIPRECT: 30, SCALEVIEWPORTEXTEX: 31,
    SCALEWINDOWEXTEX: 32, SAVEDC: 33, RESTOREDC: 34, SETWORLDTRANSFORM: 35,
    MODIFYWORLDTRANSFORM: 36, SELECTOBJECT: 37, CREATEPEN: 38,
    CREATEBRUSHINDIRECT: 39, DELETEOBJECT: 40, ELLIPSE: 42, RECTANGLE: 43,
    ROUNDRECT: 44, ARC: 45, CHORD: 46, PIE: 47, LINETO: 54, ARCTO: 55,
    POLYDRAW: 56, SETARCDIRECTION: 57, SETMITERLIMIT: 58, BEGINPATH: 59,
    ENDPATH: 60, CLOSEFIGURE: 61, FILLPATH: 62, STROKEANDFILLPATH: 63,
    STROKEPATH: 64, FLATTENPATH: 65, WIDENPATH: 66, SELECTCLIPPATH: 67,
    ABORTPATH: 68, GDICOMMENT: 70, FILLRGN: 71, FRAMERGN: 72, INVERTRGN: 73,
    PAINTRGN: 74, EXTSELECTCLIPRGN: 75, BITBLT: 76, STRETCHBLT: 77,
    MASKBLT: 78, PLGBLT: 79, SETDIBITSTODEVICE: 80, STRETCHDIBITS: 81,
    EXTCREATEFONTINDIRECTW: 82, EXTTEXTOUTA: 83, EXTTEXTOUTW: 84,
    POLYBEZIER16: 85, POLYGON16: 86, POLYLINE16: 87, POLYBEZIERTO16: 88,
    POLYLINETO16: 89, POLYPOLYLINE16: 90, POLYPOLYGON16: 91, POLYDRAW16: 92,
    CREATEMONOBRUSH: 93, CREATEDIBPATTERNBRUSHPT: 94, EXTCREATEPEN: 95,
    POLYTEXTOUTA: 96, POLYTEXTOUTW: 97, SMALLTEXTOUT: 108, ALPHABLEND: 114,
    TRANSPARENTBLT: 116, GRADIENTFILL: 117
  };

  function num(value, fallback) {
    const n = Number(value);
    return Number.isFinite(n) ? n : (fallback || 0);
  }
  function clampOffset(view, off, len) {
    return off >= 0 && len >= 0 && off + len <= view.byteLength;
  }
  function colorRef(value) {
    const v = Number(value) >>> 0;
    const r = v & 0xff, g = (v >>> 8) & 0xff, b = (v >>> 16) & 0xff;
    return `rgb(${r},${g},${b})`;
  }
  function esc(value) {
    return String(value == null ? '' : value)
      .replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;').replace(/'/g, '&#39;');
  }
  function svgEl(name, attrs) {
    const el = document.createElementNS(SVG_NS, name);
    Object.entries(attrs || {}).forEach(([key, value]) => {
      if (value == null || value === '') return;
      if (key === 'href') {
        el.setAttributeNS(XLINK_NS, 'xlink:href', String(value));
        el.setAttribute('href', String(value));
      } else {
        el.setAttribute(key, String(value));
      }
    });
    return el;
  }
  function parseCssPx(value, fallback) {
    const match = String(value == null ? '' : value).match(/[-+]?\d*\.?\d+/);
    const n = match ? Number(match[0]) : NaN;
    return Number.isFinite(n) && n > 0 ? n : fallback;
  }
  function copyMatrix(m) { return { a:m.a,b:m.b,c:m.c,d:m.d,e:m.e,f:m.f }; }
  function identity() { return { a:1,b:0,c:0,d:1,e:0,f:0 }; }
  function multiply(left, right) {
    return {
      a: left.a * right.a + left.c * right.b,
      b: left.b * right.a + left.d * right.b,
      c: left.a * right.c + left.c * right.d,
      d: left.b * right.c + left.d * right.d,
      e: left.a * right.e + left.c * right.f + left.e,
      f: left.b * right.e + left.d * right.f + left.f,
    };
  }
  function matrixScale(m) {
    const sx = Math.hypot(m.a, m.b), sy = Math.hypot(m.c, m.d);
    return Math.max(0.0001, (sx + sy) / 2);
  }

  class EmbeddedEmfRenderer {
    constructor(input) {
      let buffer = input;
      if (ArrayBuffer.isView(input)) buffer = input.buffer.slice(input.byteOffset, input.byteOffset + input.byteLength);
      if (!(buffer instanceof ArrayBuffer)) throw new Error('Dữ liệu EMF không hợp lệ.');
      this.buffer = buffer;
      this.view = new DataView(buffer);
      if (this.view.byteLength < 88 || this.view.getUint32(0, true) !== EMR.HEADER) {
        throw new Error('Không nhận diện được tiêu đề EMF.');
      }
    }

    render(settings) {
      const view = this.view;
      const bounds = {
        left: view.getInt32(8, true), top: view.getInt32(12, true),
        right: view.getInt32(16, true), bottom: view.getInt32(20, true)
      };
      const naturalW = Math.max(1, bounds.right - bounds.left);
      const naturalH = Math.max(1, bounds.bottom - bounds.top);
      const width = parseCssPx(settings && settings.width, Math.max(1, num(settings && settings.xExt, naturalW)));
      const height = parseCssPx(settings && settings.height, Math.max(1, num(settings && settings.yExt, naturalH)));
      const svg = svgEl('svg', {
        xmlns: SVG_NS, 'xmlns:xlink': XLINK_NS,
        width, height,
        viewBox: `${bounds.left} ${bounds.top} ${naturalW} ${naturalH}`,
        preserveAspectRatio: 'xMidYMid meet', overflow: 'visible'
      });
      const root = svgEl('g', { 'data-cv-embedded-emf': '1' });
      svg.appendChild(root);

      const objects = new Map();
      const stock = {
        0:{type:'brush',color:'#fff'},1:{type:'brush',color:'#c0c0c0'},2:{type:'brush',color:'#808080'},
        3:{type:'brush',color:'#404040'},4:{type:'brush',color:'#000'},5:{type:'brush',null:true},
        6:{type:'pen',color:'#fff',width:1},7:{type:'pen',color:'#000',width:1},8:{type:'pen',null:true},
        18:{type:'brush',color:'#fff'},19:{type:'pen',color:'#000',width:1}
      };
      const defaultState = () => ({
        world: identity(), windowOrg:{x:0,y:0}, viewportOrg:{x:0,y:0},
        windowExt:{x:1,y:1,set:false}, viewportExt:{x:1,y:1,set:false},
        pen: stock[7], brush: stock[5], current:{x:0,y:0}, textColor:'#000', bkColor:'#fff',
        bkMode:1, textAlign:0, polyFillMode:1, path:null, pathClosed:false, font:null
      });
      let state = defaultState();
      const saved = [];
      let emitted = 0;

      const cloneState = (s) => ({
        world:copyMatrix(s.world), windowOrg:{...s.windowOrg}, viewportOrg:{...s.viewportOrg},
        windowExt:{...s.windowExt}, viewportExt:{...s.viewportExt}, pen:s.pen, brush:s.brush,
        current:{...s.current}, textColor:s.textColor, bkColor:s.bkColor, bkMode:s.bkMode,
        textAlign:s.textAlign, polyFillMode:s.polyFillMode,
        path:s.path ? {commands:s.path.commands.slice(), start:s.path.start && {...s.path.start}, last:s.path.last && {...s.path.last}} : null,
        pathClosed:s.pathClosed, font:s.font
      });
      const mapPoint = (x, y) => {
        const m = state.world;
        let px = m.a * x + m.c * y + m.e;
        let py = m.b * x + m.d * y + m.f;
        if (state.windowExt.set && state.viewportExt.set && state.windowExt.x && state.windowExt.y) {
          px = (px - state.windowOrg.x) * state.viewportExt.x / state.windowExt.x + state.viewportOrg.x;
          py = (py - state.windowOrg.y) * state.viewportExt.y / state.windowExt.y + state.viewportOrg.y;
        }
        return {x:px,y:py};
      };
      const styleFor = (strokeWanted, fillWanted, penOverride, brushOverride) => {
        const pen = penOverride || state.pen || stock[7];
        const brush = brushOverride || state.brush || stock[5];
        const attrs = {
          fill: fillWanted && brush && !brush.null ? (brush.color || '#000') : 'none',
          stroke: strokeWanted && pen && !pen.null ? (pen.color || '#000') : 'none',
          'stroke-width': strokeWanted && pen && !pen.null ? Math.max(0.35, num(pen.width, 1) * matrixScale(state.world)) : 0,
          'stroke-linecap':'round', 'stroke-linejoin':'round',
          'fill-rule': state.polyFillMode === 1 ? 'evenodd' : 'nonzero'
        };
        if (pen && Array.isArray(pen.dash) && pen.dash.length) attrs['stroke-dasharray'] = pen.dash.join(' ');
        return attrs;
      };
      const emitPath = (commands, strokeWanted, fillWanted, penOverride, brushOverride) => {
        if (!commands || !commands.length) return;
        const d = commands.join(' ');
        if (!/[MLCQAZ]/.test(d)) return;
        root.appendChild(svgEl('path', Object.assign({d}, styleFor(strokeWanted, fillWanted, penOverride, brushOverride))));
        emitted += 1;
      };
      const ensurePath = () => {
        if (!state.path) state.path = {commands:[], start:null, last:null};
        return state.path;
      };
      const beginAt = (p) => {
        const path = ensurePath();
        path.commands.push(`M ${p.x} ${p.y}`);
        path.start = {...p}; path.last = {...p};
      };
      const lineTo = (p) => {
        const path = ensurePath();
        if (!path.last) beginAt(mapPoint(state.current.x, state.current.y));
        path.commands.push(`L ${p.x} ${p.y}`); path.last = {...p};
      };
      const cubicTo = (p1,p2,p3) => {
        const path = ensurePath();
        if (!path.last) beginAt(mapPoint(state.current.x, state.current.y));
        path.commands.push(`C ${p1.x} ${p1.y} ${p2.x} ${p2.y} ${p3.x} ${p3.y}`); path.last={...p3};
      };
      const finishStandalone = (commands, close, fill) => {
        const out = commands.slice(); if (close) out.push('Z');
        emitPath(out, true, !!fill);
      };
      const readPoints = (recordOffset, count, shortPoints, pointsOffset) => {
        const points=[]; let p = recordOffset + pointsOffset;
        const stride = shortPoints ? 4 : 8;
        for (let i=0;i<count;i++,p+=stride) {
          if (!clampOffset(view,p,stride)) break;
          const x = shortPoints ? view.getInt16(p,true) : view.getInt32(p,true);
          const y = shortPoints ? view.getInt16(p+2,true) : view.getInt32(p+4,true);
          points.push({raw:{x,y},mapped:mapPoint(x,y)});
        }
        return points;
      };
      const handleObject = (rawHandle) => {
        const h = Number(rawHandle) >>> 0;
        if (h & 0x80000000) return stock[h & 0x7fffffff] || null;
        return objects.get(h) || null;
      };
      const selectObject = (h) => {
        const obj = handleObject(h); if (!obj) return;
        if (obj.type === 'pen') state.pen = obj;
        else if (obj.type === 'brush') state.brush = obj;
        else if (obj.type === 'font') state.font = obj;
      };
      const createPen = (style,width,color) => {
        const base = style & 0x0f;
        const pen = {type:'pen', null:base===5, color:colorRef(color), width:Math.max(0.5,Math.abs(width)||1)};
        if (base===1) pen.dash=[6,4]; else if(base===2) pen.dash=[1.5,3]; else if(base===3) pen.dash=[6,3,1.5,3]; else if(base===4) pen.dash=[6,3,1.5,3,1.5,3];
        return pen;
      };
      const decodeText = (recordOffset, offString, nChars, wide) => {
        const start = recordOffset + offString;
        const bytes = nChars * (wide ? 2 : 1);
        if (!(nChars > 0) || !clampOffset(view,start,bytes)) return '';
        try {
          if (wide) {
            let out=''; for(let i=0;i<nChars;i++) out += String.fromCharCode(view.getUint16(start+i*2,true)); return out.replace(/\0+$/,'');
          }
          const arr = new Uint8Array(view.buffer, view.byteOffset + start, nChars);
          try { return new TextDecoder('windows-1252').decode(arr).replace(/\0+$/,''); } catch (_) { return String.fromCharCode(...arr).replace(/\0+$/,''); }
        } catch (_) { return ''; }
      };
      const normalizeEmfTextForFont = (value, face) => {
        const fontFace = String(face || '');
        if (!/symbol/i.test(fontFace)) return String(value || '');
        return Array.from(String(value || '')).map((character) => {
          const code = character.codePointAt(0) || 0;
          /* MathType/Equation Editor thường ghi Symbol theo vùng PUA F0xx.
             Trình duyệt có thể fallback sang font khác và hiện € / ô vuông.
             Chuẩn hóa các toán tử thông dụng về Unicode thật. */
          if (code === 0xF02D) return '−';
          if (code === 0xF02B) return '+';
          if (code === 0xF03D) return '=';
          if (code === 0xF0B1) return '±';
          if (code === 0xF0B4) return '×';
          return character;
        }).join('');
      };

      const emitText = (x,y,text, forceStartAnchor = false) => {
        if (!text) return;
        const p=mapPoint(x,y); const align=state.textAlign>>>0;
        let anchor='start';
        if (!forceStartAnchor) {
          if ((align & 6)===6) anchor='middle';
          else if (align & 2) anchor='end';
        }
        let baseline='alphabetic'; if (align & 8) baseline='text-after-edge'; else if (!(align & 24)) baseline='text-before-edge';
        const font = state.font || {};
        /* Cỡ chữ trong EMF dùng logical units giống tọa độ x/y. mapPoint() đã
           áp dụng WindowExt/ViewportExt cho tọa độ, nhưng trước đây font-size
           lại không áp dụng tỉ lệ này. Với ChemSketch mẫu:
             WindowExtY=189, ViewportExtY=60 => scale ≈ 0.317
           nên chữ -13 logical units phải hiển thị khoảng 4.1 units, không phải 13.
           Bỏ min 8 cũ vì chính ngưỡng này làm O/H/N/H₂ chồng lên nhau. */
        let logicalFontScale = 1;
        if (state.windowExt.set && state.viewportExt.set && state.windowExt.y) {
          const sy = Math.abs(state.viewportExt.y / state.windowExt.y);
          if (Number.isFinite(sy) && sy > 0) logicalFontScale = sy;
        }
        const worldFontScale = Math.max(
          0.0001,
          Math.hypot(Number(state.world.c) || 0, Number(state.world.d) || 1)
        );
        let size = Math.max(
          0.75,
          Math.abs(num(font.height,16)) * worldFontScale * logicalFontScale
        );
        const face = String(font.face || '');
        /* Nhóm nhãn hoá học nhỏ như OH, NH2 trong EMF của ChemSketch cần nhỉnh hơn
           một chút để nhìn tự nhiên hơn, nhưng chỉ tăng cho chữ Arial cỡ nhỏ để
           không làm ảnh hưởng các tiêu đề/chữ lớn khác. */
        if (/arial/i.test(face)) {
          if (size <= 5.2) size *= 1.28;
          else if (size <= 6.4) size *= 1.15;
        }
        const normalizedText = normalizeEmfTextForFont(text, face);
        const t=svgEl('text',{x:p.x,y:p.y,fill:state.textColor,'font-family':font.face||'Arial, sans-serif','font-size':size,'font-style':font.italic?'italic':'normal','font-weight':font.weight>=600?'700':'400','text-anchor':anchor,'dominant-baseline':baseline});
        t.textContent=normalizedText; root.appendChild(t); emitted += 1;
      };
      const readEmrText = (recordOffset, textOffset, wide) => {
        if (!clampOffset(view, recordOffset+textOffset, 40)) return;
        const p = recordOffset + textOffset;
        const x=view.getInt32(p,true);
        const y=view.getInt32(p+4,true);
        const nChars=view.getUint32(p+8,true);
        const offString=view.getUint32(p+12,true);
        const options=view.getUint32(p+16,true);
        const offDx=view.getUint32(p+36,true);
        const rawText=decodeText(recordOffset,offString,nChars,wide);
        if (!rawText) return;

        /* TA_UPDATECP (bit 0): MathType dùng vị trí hiện tại do MOVETOEX đặt,
           còn x/y trong EMRTEXT thường bằng 0. Bản cũ bỏ qua cờ này nên mọi
           run CH / chỉ số / ngoặc / dấu trừ bị dồn chồng tại (0,0). */
        const updateCurrentPosition = !!((state.textAlign >>> 0) & 0x0001);
        let cursorX = updateCurrentPosition ? Number(state.current.x) || 0 : x;
        let cursorY = updateCurrentPosition ? Number(state.current.y) || 0 : y;

        /* Khi có offDx, khoảng cách ký tự là dữ liệu bố cục thật của MathType.
           Đặc biệt chuỗi "()" có DX lớn để hai ngoặc nằm hai đầu công thức;
           nếu bỏ DX thì hai ngoặc dính sát nhau. */
        const hasPdy = !!(options & 0x2000);
        const dxCount = hasPdy ? nChars * 2 : nChars;
        const dxStart = recordOffset + offDx;
        const canUseDx = offDx > 0 && dxCount > 0
          && clampOffset(view, dxStart, dxCount * 4);

        if (canUseDx && rawText.length) {
          const characters = Array.from(rawText).slice(0, nChars);
          for (let index = 0; index < characters.length; index += 1) {
            emitText(cursorX, cursorY, characters[index], true);
            if (hasPdy) {
              cursorX += view.getInt32(dxStart + index * 8, true);
              cursorY += view.getInt32(dxStart + index * 8 + 4, true);
            } else {
              cursorX += view.getInt32(dxStart + index * 4, true);
            }
          }
        } else {
          emitText(cursorX, cursorY, rawText);
          const font = state.font || {};
          cursorX += Math.max(1, Math.abs(num(font.height,16)) * 0.55 * rawText.length);
        }

        if (updateCurrentPosition) {
          state.current = { x:cursorX, y:cursorY };
        }
      };

      let off = 0, records = 0;
      while (off + 8 <= view.byteLength && records < 200000) {
        const type = view.getUint32(off,true), size=view.getUint32(off+4,true);
        if (size < 8 || off + size > view.byteLength) break;
        try {
          switch(type) {
            case EMR.HEADER: break;
            case EMR.EOF: off += size; records += 1; continue;
            case EMR.SAVEDC: saved.push(cloneState(state)); break;
            case EMR.RESTOREDC: {
              const rel = clampOffset(view,off+8,4) ? view.getInt32(off+8,true) : -1;
              if (saved.length) {
                if (rel < 0) { let idx=Math.max(0,saved.length+rel); state=cloneState(saved[idx]); saved.length=idx; }
                else { state=cloneState(saved[Math.max(0,Math.min(saved.length-1,rel-1))]); saved.length=Math.max(0,rel-1); }
              }
              break;
            }
            case EMR.SETWORLDTRANSFORM:
            case EMR.MODIFYWORLDTRANSFORM: {
              if (clampOffset(view,off+8,24)) {
                const m={a:view.getFloat32(off+8,true),b:view.getFloat32(off+12,true),c:view.getFloat32(off+16,true),d:view.getFloat32(off+20,true),e:view.getFloat32(off+24,true),f:view.getFloat32(off+28,true)};
                if (type===EMR.SETWORLDTRANSFORM) state.world=m;
                else {
                  const mode=clampOffset(view,off+32,4)?view.getUint32(off+32,true):4;
                  if(mode===1) state.world=identity(); else if(mode===2) state.world=multiply(m,state.world); else if(mode===3) state.world=multiply(state.world,m); else state.world=m;
                }
              }
              break;
            }
            case EMR.SETWINDOWORGEX: state.windowOrg={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true)}; break;
            case EMR.SETVIEWPORTORGEX: state.viewportOrg={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true)}; break;
            case EMR.SETWINDOWEXTEX: state.windowExt={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true),set:true}; break;
            case EMR.SETVIEWPORTEXTEX: state.viewportExt={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true),set:true}; break;
            case EMR.SCALEWINDOWEXTEX: if(state.windowExt.set){state.windowExt.x*=view.getInt32(off+8,true)/Math.max(1,view.getInt32(off+12,true));state.windowExt.y*=view.getInt32(off+16,true)/Math.max(1,view.getInt32(off+20,true));} break;
            case EMR.SCALEVIEWPORTEXTEX: if(state.viewportExt.set){state.viewportExt.x*=view.getInt32(off+8,true)/Math.max(1,view.getInt32(off+12,true));state.viewportExt.y*=view.getInt32(off+16,true)/Math.max(1,view.getInt32(off+20,true));} break;
            case EMR.CREATEPEN: {
              const h=view.getUint32(off+8,true), style=view.getUint32(off+12,true), w=view.getInt32(off+16,true), color=view.getUint32(off+24,true); objects.set(h,createPen(style,w,color)); break;
            }
            case EMR.EXTCREATEPEN: {
              const h=view.getUint32(off+8,true); const style=clampOffset(view,off+28,4)?view.getUint32(off+28,true):0; const w=clampOffset(view,off+32,4)?view.getUint32(off+32,true):1; const color=clampOffset(view,off+40,4)?view.getUint32(off+40,true):0; objects.set(h,createPen(style,w,color)); break;
            }
            case EMR.CREATEBRUSHINDIRECT: {
              const h=view.getUint32(off+8,true), style=view.getUint32(off+12,true), color=view.getUint32(off+16,true); objects.set(h,{type:'brush',null:style===1,color:colorRef(color),style}); break;
            }
            case EMR.EXTCREATEFONTINDIRECTW: {
              const h=view.getUint32(off+8,true); let face='';
              if (clampOffset(view,off+40,64)) { for(let i=0;i<32;i++){const c=view.getUint16(off+40+i*2,true);if(!c)break;face+=String.fromCharCode(c);} }
              objects.set(h,{type:'font',height:clampOffset(view,off+12,4)?view.getInt32(off+12,true):16,weight:clampOffset(view,off+28,4)?view.getInt32(off+28,true):400,italic:clampOffset(view,off+32,1)?!!view.getUint8(off+32):false,face}); break;
            }
            case EMR.SELECTOBJECT: selectObject(view.getUint32(off+8,true)); break;
            case EMR.DELETEOBJECT: objects.delete(view.getUint32(off+8,true)); break;
            case EMR.SETTEXTCOLOR: state.textColor=colorRef(view.getUint32(off+8,true)); break;
            case EMR.SETBKCOLOR: state.bkColor=colorRef(view.getUint32(off+8,true)); break;
            case EMR.SETBKMODE: state.bkMode=view.getUint32(off+8,true); break;
            case EMR.SETTEXTALIGN: state.textAlign=view.getUint32(off+8,true); break;
            case EMR.SETPOLYFILLMODE: state.polyFillMode=view.getUint32(off+8,true); break;
            case EMR.MOVETOEX: state.current={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true)}; if(state.path) beginAt(mapPoint(state.current.x,state.current.y)); break;
            case EMR.LINETO: {
              const raw={x:view.getInt32(off+8,true),y:view.getInt32(off+12,true)}, p=mapPoint(raw.x,raw.y);
              if(state.path) lineTo(p); else finishStandalone([`M ${mapPoint(state.current.x,state.current.y).x} ${mapPoint(state.current.x,state.current.y).y}`,`L ${p.x} ${p.y}`],false,false);
              state.current=raw; break;
            }
            case EMR.BEGINPATH: state.path={commands:[],start:null,last:null}; break;
            case EMR.ENDPATH: break;
            case EMR.CLOSEFIGURE: if(state.path){state.path.commands.push('Z');state.pathClosed=true;} break;
            case EMR.ABORTPATH: state.path=null; state.pathClosed=false; break;
            case EMR.FILLPATH: if(state.path){emitPath(state.path.commands,false,true);state.path=null;} break;
            case EMR.STROKEPATH: if(state.path){emitPath(state.path.commands,true,false);state.path=null;} break;
            case EMR.STROKEANDFILLPATH: if(state.path){emitPath(state.path.commands,true,true);state.path=null;} break;
            case EMR.POLYLINE: case EMR.POLYGON: case EMR.POLYBEZIER: case EMR.POLYLINETO: case EMR.POLYBEZIERTO:
            case EMR.POLYLINE16: case EMR.POLYGON16: case EMR.POLYBEZIER16: case EMR.POLYLINETO16: case EMR.POLYBEZIERTO16: {
              const shortPoints=type>=EMR.POLYBEZIER16&&type<=EMR.POLYLINETO16; const count=view.getUint32(off+24,true); const pts=readPoints(off,count,shortPoints,28);
              const isTo=[EMR.POLYLINETO,EMR.POLYBEZIERTO,EMR.POLYLINETO16,EMR.POLYBEZIERTO16].includes(type);
              const bezier=[EMR.POLYBEZIER,EMR.POLYBEZIERTO,EMR.POLYBEZIER16,EMR.POLYBEZIERTO16].includes(type);
              const polygon=[EMR.POLYGON,EMR.POLYGON16].includes(type);
              const target = state.path ? state.path.commands : [];
              let idx=0;
              if(isTo){const cur=mapPoint(state.current.x,state.current.y); if(!state.path) target.push(`M ${cur.x} ${cur.y}`); else if(!state.path.last) beginAt(cur);}
              else if(pts.length){target.push(`M ${pts[0].mapped.x} ${pts[0].mapped.y}`);idx=1;if(state.path){state.path.start={...pts[0].mapped};state.path.last={...pts[0].mapped};}}
              if(bezier){for(;idx+2<pts.length;idx+=3){target.push(`C ${pts[idx].mapped.x} ${pts[idx].mapped.y} ${pts[idx+1].mapped.x} ${pts[idx+1].mapped.y} ${pts[idx+2].mapped.x} ${pts[idx+2].mapped.y}`);}}
              else {for(;idx<pts.length;idx++) target.push(`L ${pts[idx].mapped.x} ${pts[idx].mapped.y}`);}
              if(polygon) target.push('Z');
              if(state.path){if(pts.length){state.path.last={...pts[pts.length-1].mapped}; if(!state.path.start)state.path.start={...pts[0].mapped};}}
              else emitPath(target,true,polygon);
              if(pts.length) state.current={...pts[pts.length-1].raw};
              break;
            }
            case EMR.POLYDRAW16: case EMR.POLYDRAW: {
              const shortPoints=type===EMR.POLYDRAW16, count=view.getUint32(off+24,true), pts=readPoints(off,count,shortPoints,28); const typesOff=off+28+count*(shortPoints?4:8);
              const target=state.path?state.path.commands:[]; let bez=[];
              for(let i=0;i<pts.length;i++){
                const typ=clampOffset(view,typesOff+i,1)?view.getUint8(typesOff+i):2; const base=typ&6;
                if(base===6){target.push(`M ${pts[i].mapped.x} ${pts[i].mapped.y}`);bez=[];}
                else if(base===2){target.push(`L ${pts[i].mapped.x} ${pts[i].mapped.y}`);bez=[];}
                else if(base===4){bez.push(pts[i].mapped);if(bez.length===3){target.push(`C ${bez[0].x} ${bez[0].y} ${bez[1].x} ${bez[1].y} ${bez[2].x} ${bez[2].y}`);bez=[];}}
                if(typ&1)target.push('Z');
              }
              if(!state.path)emitPath(target,true,false); if(pts.length)state.current={...pts[pts.length-1].raw}; break;
            }
            case EMR.RECTANGLE: case EMR.ELLIPSE: {
              const l=view.getInt32(off+8,true),t=view.getInt32(off+12,true),r=view.getInt32(off+16,true),b=view.getInt32(off+20,true); const p1=mapPoint(l,t),p2=mapPoint(r,b);
              const attrs=styleFor(true,true);
              if(type===EMR.RECTANGLE)root.appendChild(svgEl('rect',Object.assign({x:Math.min(p1.x,p2.x),y:Math.min(p1.y,p2.y),width:Math.abs(p2.x-p1.x),height:Math.abs(p2.y-p1.y)},attrs)));
              else root.appendChild(svgEl('ellipse',Object.assign({cx:(p1.x+p2.x)/2,cy:(p1.y+p2.y)/2,rx:Math.abs(p2.x-p1.x)/2,ry:Math.abs(p2.y-p1.y)/2},attrs)));
              emitted+=1;break;
            }
            case EMR.FILLRGN: {
              const cb=view.getUint32(off+24,true), brushH=view.getUint32(off+28,true), brush=handleObject(brushH)||state.brush; const data=off+32;
              if(cb>=32&&clampOffset(view,data,Math.min(cb,size-32))){const n=view.getUint32(data+8,true);let rp=data+32;for(let i=0;i<n&&clampOffset(view,rp,16);i++,rp+=16){const l=view.getInt32(rp,true),t=view.getInt32(rp+4,true),r=view.getInt32(rp+8,true),b=view.getInt32(rp+12,true);const a=mapPoint(l,t),c=mapPoint(r,t),d=mapPoint(r,b),e=mapPoint(l,b);emitPath([`M ${a.x} ${a.y}`,`L ${c.x} ${c.y}`,`L ${d.x} ${d.y}`,`L ${e.x} ${e.y}`,'Z'],false,true,null,brush);}}
              break;
            }
            case EMR.EXTTEXTOUTA: readEmrText(off,36,false); break;
            case EMR.EXTTEXTOUTW: readEmrText(off,36,true); break;
            case EMR.POLYTEXTOUTA: case EMR.POLYTEXTOUTW: {
              const count=clampOffset(view,off+36,4)?view.getUint32(off+36,true):0; for(let i=0;i<count;i++)readEmrText(off,40+i*40,type===EMR.POLYTEXTOUTW); break;
            }
            case EMR.SETPIXELV: {
              const p=mapPoint(view.getInt32(off+8,true),view.getInt32(off+12,true));root.appendChild(svgEl('rect',{x:p.x,y:p.y,width:1,height:1,fill:colorRef(view.getUint32(off+16,true))}));emitted+=1;break;
            }
            default: break;
          }
        } catch (error) {
          if (logging && global.console) console.warn('Embedded EMF record failed',type,off,error);
        }
        off += size; records += 1;
        if (type===EMR.EOF) break;
      }
      svg.setAttribute('data-cv-emf-elements',String(emitted));
      if (!emitted) throw new Error('Bộ đọc EMF nhúng không tạo được phần tử đồ họa.');
      return svg;
    }
  }

  global.EMFJS = {
    Renderer: EmbeddedEmfRenderer,
    loggingEnabled(value) { logging=!!value; },
    __cv7991Embedded: true,
    version: 'cv7991-embedded-emf-1.0.0'
  };
})(window);
</script>
<script src="https://unpkg.com/html2canvas@1.4.1/dist/html2canvas.min.js"></script>
<style>
    .qgen-toolbar-btn { margin-left: 8px; }
    .qgen-modal { position: fixed; inset: 0; z-index: 1400; }
    .qgen-modal[hidden] { display: none !important; }
    .qgen-backdrop { position: absolute; inset: 0; background: rgba(15, 23, 42, 0.52); }
    .qgen-dialog {
      position: absolute; inset: 24px; background: #fff; border-radius: 22px; box-shadow: 0 24px 64px rgba(15, 23, 42, 0.28);
      display: grid; grid-template-rows: auto 1fr; overflow: hidden; border: 1px solid #dbe4f0;
    }
    .qgen-head {
      display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 18px 22px;
      background: linear-gradient(135deg, #eff6ff, #f8fafc); border-bottom: 1px solid #dbe4f0;
    }
    .qgen-head h3 { margin: 0 0 4px; font-size: 22px; color: #0f172a; }
    .qgen-head p { margin: 0; color: #64748b; font-size: 14px; }
    .qgen-body { min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr); }
    .qgen-left {
      min-width: 0; min-height: 0; padding: 18px; border-right: 0; display: grid; grid-auto-rows: max-content;
      gap: 14px; background: #fcfdff;
    }
    .qgen-right { min-width: 0; min-height: 0; padding: 18px; display: grid; grid-template-rows: auto auto 1fr; gap: 12px; }
    .qgen-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 12px; }
    .qgen-structure-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .qgen-type-card { border: 1px solid #dbeafe; border-radius: 14px; background: #f8fbff; padding: 12px; display: grid; gap: 10px; }
    .qgen-type-title { font-weight: 900; color: #0f172a; font-size: 14px; }
    .qgen-level-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
    .qgen-score-field { max-width: 180px; }
    .qgen-score-options { display: grid; gap: 8px; font-size: 13px; color: #334155; font-weight: 700; }
    .qgen-score-options label { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
    .qgen-score-options input[type="radio"] { width: auto; }
    .qgen-score-options input[type="number"] { width: 90px; padding: 7px 9px; border: 1px solid #cbd5e1; border-radius: 10px; }
    .qgen-field { display: grid; gap: 6px; }
    .qgen-field label { font-size: 13px; font-weight: 800; color: #334155; }
    .qgen-field input, .qgen-field textarea {
      width: 100%; border: 1px solid #cbd5e1; border-radius: 12px; padding: 10px 12px; outline: none; background: #fff; color: #0f172a;
    }
    .qgen-field input:focus, .qgen-field textarea:focus { border-color: #60a5fa; box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.18); }
    .qgen-field textarea { min-height: 340px; resize: vertical; font-family: 'Times New Roman', Times, serif; font-size: 13px; line-height: 1.45; }
    .qgen-actions { display: flex; flex-wrap: wrap; gap: 8px; }
    .qgen-actions .nav-btn, .qgen-head .nav-btn { padding: 10px 14px; border-radius: 12px; }
    .qgen-preset-bank {
      display: grid; gap: 8px; margin: 0 0 12px; padding: 12px;
      border: 1px solid #dbeafe; border-radius: 14px; background: #f8fbff;
    }
    .qgen-preset-bank label { font-size: 13px; font-weight: 800; color: #334155; }
    .qgen-preset-row { display: grid; grid-template-columns: minmax(220px, 1fr) auto; gap: 10px; align-items: center; }
    .qgen-preset-row select {
      width: 100%; border: 1px solid #cbd5e1; border-radius: 12px; padding: 11px 12px;
      font: inherit; color: #0f172a; background: #fff; outline: none;
    }
    .qgen-preset-row select:focus { border-color: #60a5fa; box-shadow: 0 0 0 3px rgba(59,130,246,.16); }
    @media (max-width: 720px) {
      .qgen-preset-row { grid-template-columns: 1fr; }
    }
    .qgen-status {
      min-height: 42px; display: flex; align-items: center; padding: 10px 12px; border-radius: 14px; border: 1px solid #dbe4f0;
      background: #f8fafc; color: #334155; font-size: 13px; font-weight: 700;
    }
    .qgen-status.err { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
    .qgen-status.ok { background: #ecfdf5; border-color: #bbf7d0; color: #166534; }
    .qgen-card {
      border: 1px solid #e2e8f0; border-radius: 16px; padding: 14px 16px; background: #fff;
    }
    .qgen-card h4 { margin: 0 0 10px; font-size: 15px; color: #0f172a; }
    .qgen-section-head {
      display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 10px;
    }
    .qgen-section-head h4 { margin: 0; flex: 1; }
    .qgen-collapse-btn {
      width: 34px; height: 34px; border-radius: 10px; border: 1px solid #93c5fd; background: #dbeafe; color: #2563eb;
      display: inline-flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 800; cursor: pointer; flex: 0 0 auto;
    }
    .qgen-collapse-btn:hover { background: #bfdbfe; }
    .qgen-collapse-btn[aria-expanded="false"] { color: #1d4ed8; }
    .qgen-collapse-target[hidden] { display: none !important; }
    .qgen-em-red { color: #facc15; font-weight: 800; font-size: 1em; line-height: inherit; }
    .qgen-preview-shell {
      min-height: 0; overflow: auto; border: 1px solid #dbe4f0; border-radius: 18px; background: #fff; padding: 18px;
    }
    .qgen-preview-empty {
      min-height: 180px; display: flex; align-items: center; justify-content: center; text-align: center; color: #64748b; background: #f8fafc; border-radius: 14px;
      padding: 20px; font-weight: 700;
    }
    .qgen-version { padding: 0 0 18px; margin: 0 0 18px; border-bottom: 1px dashed #cbd5e1; }
    .qgen-version:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
    .qgen-version-title { text-align: center; font-size: 20px; font-weight: 800; margin: 0 0 6px; color: #0f172a; }
    .qgen-exam-title { text-align: center; font-size: 16px; font-weight: 700; margin: 0 0 12px; color: #334155; }
    .qgen-meta { margin: 0 0 12px; color: #334155; }
    .qgen-meta p { margin: 0 0 6px; }
    .qgen-note { font-style: italic; margin: 0 0 14px; color: #475569; }
    .qgen-question { margin: 0 0 12px; }
    .qgen-type-heading { margin: 14px 0 8px; text-align: left; font-size: 15px; font-weight: 900; color: #1d4ed8; }
    .qgen-question p { margin: 0 0 6px; color: #0f172a; line-height: 1.5; }
    .qgen-question-line strong { font-weight: 800; }
    .qgen-option-line { white-space: pre-wrap; font-family: 'Times New Roman', serif; margin: 0 0 6px; }
    .qgen-option-line .qgen-option-letter { font-weight: 800; }
    .qgen-option-block { margin: 0 0 8px; }
    .qgen-option-layout { margin: 0 0 8px; }
    .qgen-option-layout-row4,
    .qgen-option-layout-grid2 {
      display: grid;
      align-items: start;
      column-gap: 6ch;
      row-gap: 6px;
      justify-content: start;
    }
    .qgen-option-layout-row4 { grid-template-columns: repeat(4, max-content); }
    .qgen-option-layout-grid2 { grid-template-columns: repeat(2, max-content); }
    .qgen-option-inline-item { min-width: 0; }
    .qgen-option-inline-item .qgen-option-line { margin-bottom: 0; }
    .qgen-embedded-image { display:block; max-width: min(100%, 420px); max-height: 280px; height:auto; border:1px solid #cbd5e1; border-radius:10px; background:#fff; padding:4px; margin:8px 0; }
    .qgen-embedded-table { width:100%; border-collapse:collapse; margin:8px 0; font-size:14px; }
    .qgen-embedded-table td, .qgen-embedded-table th { border:1px solid #94a3b8; padding:6px 8px; vertical-align:top; }
    .qgen-answer-box { border-top: 1px solid #cbd5e1; padding-top: 14px; margin-top: 16px; }
    .qgen-answer-box h4 { margin: 0 0 10px; font-size: 16px; }
    .qgen-answer-chip {
      display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: 999px; background: #eff6ff; color: #1d4ed8; font-weight: 800; margin: 0 8px 8px 0;
    }
    .qgen-small { font-size: 12px; color: #64748b; line-height: 1.4; }
    .qgen-inline-wrap {
      margin-top: 18px;
      border: 1px solid #dbe4f0;
      border-radius: 20px;
      background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
      overflow: hidden;
    }
    .qgen-inline-head {
      padding: 18px 20px;
      border-bottom: 1px solid #e2e8f0;
      background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
    }
    .qgen-inline-head h4 { margin: 0 0 4px; font-size: 22px; color: #0f172a; }
    .qgen-inline-head p { margin: 0; color: #64748b; font-size: 14px; }
    .qgen-inline-body { min-height: 760px; }
    .qgen-inline-body .qgen-left,
    .qgen-inline-body .qgen-right { background: transparent; }
    @media (max-width: 1100px) {
      .qgen-dialog { inset: 14px; }
      .qgen-body { grid-template-columns: 1fr; }
      .qgen-left { border-right: 0; border-bottom: 1px solid #e2e8f0; }
      .qgen-structure-grid { grid-template-columns: 1fr; }
      .qgen-level-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    }
</style>

<style id="mvip-uniform-font-style">
  html, body,
  body *:not(code):not(pre) {
    font-family: 'Times New Roman', Times, serif !important;
    font-synthesis-weight: none;
  }

  body {
    font-weight: 400 !important;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  button, input, select, textarea, label,
  .nav a, .tab-btn, .nav-btn,
  .class-manage-btn, .class-manager-subbtn,
  .cv7991-class-item, .cv7991-check,
  .report-radio, .qgen-toolbar-btn {
    font-weight: 700 !important;
  }

  h1, h2, h3, h4, h5, h6, strong, b,
  .brand-text, .intro-title, .section-title, .card-title,
  .cv7991-step-title, .qgen-type-title,
  .qgen-version-title, .qgen-type-heading {
    font-weight: 700 !important;
  }

  p, small, .muted, .subtle, .compact-note,
  .cv7991-bank-status, .cv7991-editor-note,
  .qgen-small, .qgen-head p {
    font-weight: 400 !important;
  }

  .qgen-field textarea,
  .qgen-option-line {
    font-family: 'Times New Roman', Times, serif !important;
  }
</style>
<script>
    (() => {
      const LETTERS = ['A', 'B', 'C', 'D'];
      const OPTION_GAP = ' '.repeat(10);
      const OPTION_WRAP_WIDTH = 90;
      const WORD_OPTION_WRAP_WIDTH = 84;
      const TWIP_CM = 567;
      const CATEGORY_ORDER = [
        ['nhan_biet', 'Nhận biết'],
        ['thong_hieu', 'Thông hiểu'],
        ['van_dung', 'Vận dụng'],
        ['van_dung_cao', 'Vận dụng cao'],
      ];
      const QUESTION_TYPE_ORDER = [
        ['single', 'Mục I. Trắc nghiệm 01 lựa chọn'],
        ['true_false', 'Mục II. Trắc nghiệm đúng/sai'],
        ['short', 'Mục III. Trả lời ngắn'],
        ['essay', 'Mục IV. Tự luận'],
      ];
      const MVIP_PRESET_QUESTION_BANKS = [

        { title: 'Toán 6 - Bài 1. Thu thập, tổ chức, biểu diễn dữ liệu', url: 'https://mvip.vn/downloads/ngan_hang_cau_hoi/Toan6_Bai_1_Thu_thap_to_chuc_bieu_dien_du_lieu.docx' },
        { title: 'Toán 6 - Bài 2. Biểu đồ cột kép', url: 'https://mvip.vn/downloads/ngan_hang_cau_hoi/Toan6_Bai_2_Bieu_do_cot_kep.docx' },
        { title: 'Toán 6 - Bài 3. Mô hình xác suất', url: 'https://mvip.vn/downloads/ngan_hang_cau_hoi/Toan6_Bai_3_Mo_hinh_xac_suat.docx' },
      ];
      const categoryLabelMap = Object.fromEntries(CATEGORY_ORDER);
      const state = { versions: [], lastText: '', includeStudentInfo: true };

      const els = {
        root: document.getElementById('qgenInlineRoot'),
        examTitle: document.getElementById('qgenExamTitle'),
        versionCount: document.getElementById('qgenVersionCount'),
        singleNhanBiet: document.getElementById('qgenSingleNhanBiet'),
        singleThongHieu: document.getElementById('qgenSingleThongHieu'),
        singleVanDung: document.getElementById('qgenSingleVanDung'),
        singleVanDungCao: document.getElementById('qgenSingleVanDungCao'),
        singleScore: document.getElementById('qgenSingleScore'),
        trueFalseNhanBiet: document.getElementById('qgenTrueFalseNhanBiet'),
        trueFalseThongHieu: document.getElementById('qgenTrueFalseThongHieu'),
        trueFalseVanDung: document.getElementById('qgenTrueFalseVanDung'),
        trueFalseVanDungCao: document.getElementById('qgenTrueFalseVanDungCao'),
        trueFalseStatementScore: document.getElementById('qgenTrueFalseStatementScore'),
        shortNhanBiet: document.getElementById('qgenShortNhanBiet'),
        shortThongHieu: document.getElementById('qgenShortThongHieu'),
        shortVanDung: document.getElementById('qgenShortVanDung'),
        shortVanDungCao: document.getElementById('qgenShortVanDungCao'),
        shortScore: document.getElementById('qgenShortScore'),
        essayNhanBiet: document.getElementById('qgenEssayNhanBiet'),
        essayThongHieu: document.getElementById('qgenEssayThongHieu'),
        essayVanDung: document.getElementById('qgenEssayVanDung'),
        essayVanDungCao: document.getElementById('qgenEssayVanDungCao'),
        generateWithNamesBtn: document.getElementById('qgenGenerateWithNamesBtn'),
        loadWordBtn: document.getElementById('qgenLoadWordBtn'),
        presetBankSelect: document.getElementById('qgenPresetBankSelect'),
        loadPresetBankBtn: document.getElementById('qgenLoadPresetBankBtn'),
        copyBtn: document.getElementById('qgenCopyBtn'),
        saveTxtBtn: document.getElementById('qgenSaveTxtBtn'),
        saveWordBtn: document.getElementById('qgenSaveWordBtn'),
        exportMacroCheckbox: document.getElementById('qgenExportMacroCheckbox'),
        clearBtn: document.getElementById('qgenClearBtn'),
        status: document.getElementById('qgenStatus'),
        summary: document.getElementById('qgenSummary'),
        input: document.getElementById('qgenInput'),
        preview: document.getElementById('qgenPreview'),
        fileInput: document.getElementById('qgenWordFileInput'),
        inputToggleBtn: document.getElementById('qgenInputToggleBtn'),
        inputSectionBody: document.getElementById('qgenInputSectionBody'),
      };

      function setStatus(message, type) {
        if (!els.status) return;
        els.status.textContent = message || '';
        els.status.className = 'qgen-status' + (type ? ' ' + type : '');
      }

      function setSummary(message, type) {
        const text = message || '';
        if (els.summary) {
          els.summary.textContent = text;
          els.summary.className = 'qgen-status' + (type ? ' ' + type : '');
        }
        if (text && type === 'ok') {
          openAlertModal(text, 'Sinh đề thành công');
        }
      }

      function selectedExamMonsFromChecklist() {
        return Array.from(document.querySelectorAll('.exam-class-manager-check:checked'))
          .map((input) => String((input && input.value) || '').trim())
          .filter(Boolean);
      }

      function shuffleArray(items) {
        const arr = Array.isArray(items) ? items.slice() : [];
        for (let i = arr.length - 1; i > 0; i -= 1) {
          const j = Math.floor(Math.random() * (i + 1));
          [arr[i], arr[j]] = [arr[j], arr[i]];
        }
        return arr;
      }

      function normalizeLetter(letter) {
        return String(letter || '').trim().toUpperCase();
      }

      function normalizeInlineText(text) {
        return String(text || '').split(/\n+/).map((part) => part.trim()).filter(Boolean).join(' ');
      }

      function renderFormattedInlineHtml(text) {
        const source = String(text || '');
        const pattern = /<(sub|sup)>([\s\S]*?)<\/\1>/gi;
        let html = '';
        let lastIndex = 0;
        let match;
        while ((match = pattern.exec(source))) {
          html += escapeHtml(source.slice(lastIndex, match.index));
          const tag = String(match[1] || '').toLowerCase();
          html += `<${tag}>${escapeHtml(match[2] || '')}</${tag}>`;
          lastIndex = pattern.lastIndex;
        }
        html += escapeHtml(source.slice(lastIndex));
        return html;
      }

      function formatSegmentText(segment) {
        const text = String(segment && segment.text || '');
        const verticalAlign = String(segment && segment.verticalAlign || '').toLowerCase();
        if (verticalAlign === 'subscript') return `<sub>${text}</sub>`;
        if (verticalAlign === 'superscript') return `<sup>${text}</sup>`;
        return text;
      }

      function hasLatexMathText(text) {
        const value = String(text || '');
        return /\$[^$]+\$/.test(value)
          || /\\\([^)]*\\\)/.test(value)
          || /\\\[[\s\S]*?\\\]/.test(value)
          || /\\(?:frac|dfrac|tfrac|sqrt|begin\{|end\{|left|right|cdot|times|div|angle|circ|degree|pi|alpha|beta|gamma|Delta|leq|geq|neq|infty|sum|overline|widehat|overrightarrow|overparen|vec)\b/.test(value)
          || /\^[{]?[0-9A-Za-z+\-]+[}]?/.test(value)
          || /_[{]?[0-9A-Za-z+\-]+[}]?/.test(value);
      }

      function optionListHasLatex(options) {
        return (Array.isArray(options) ? options : []).some((opt) => hasLatexMathText(opt && opt.text));
      }

      const IMAGE_MARKER_PREFIX = '[[IMG:';
      const TABLE_MARKER_PREFIX = '[[TABLE64:';

      function base64EncodeUtf8(value) {
        try {
          return btoa(unescape(encodeURIComponent(String(value || ''))));
        } catch (err) {
          return '';
        }
      }

      function base64DecodeUtf8(value) {
        try {
          return decodeURIComponent(escape(atob(String(value || ''))));
        } catch (err) {
          return '';
        }
      }

      function makeImageMarker(dataUrl) {
        return dataUrl ? `${IMAGE_MARKER_PREFIX}${dataUrl}]]` : '';
      }

      function parseImageMarker(line) {
        const match = String(line || '').trim().match(/^\[\[IMG:(data:[^\]]+)\]\]$/i);
        return match ? String(match[1] || '').trim() : '';
      }

      function makeTableMarker(rows) {
        const safeRows = Array.isArray(rows) ? rows.map((row) => (Array.isArray(row) ? row.map((cell) => String(cell || '')) : [])) : [];
        const encoded = base64EncodeUtf8(JSON.stringify({ rows: safeRows }));
        return encoded ? `${TABLE_MARKER_PREFIX}${encoded}]]` : '';
      }

      function parseTableMarker(line) {
        const match = String(line || '').trim().match(/^\[\[TABLE64:([^\]]+)\]\]$/i);
        if (!match) return null;
        const decoded = base64DecodeUtf8(match[1]);
        if (!decoded) return null;
        try {
          const parsed = JSON.parse(decoded);
          return Array.isArray(parsed && parsed.rows) ? parsed.rows : null;
        } catch (err) {
          return null;
        }
      }

      function extractRichBlocks(text) {
        const lines = String(text || '').replace(/\r/g, '').split('\n');
        const blocks = [];
        let textBuffer = [];

        function flushText() {
          const value = textBuffer.join('\n').trim();
          if (value) blocks.push({ type: 'text', text: value });
          textBuffer = [];
        }

        lines.forEach((rawLine) => {
          const line = String(rawLine || '');
          const img = parseImageMarker(line);
          if (img) {
            flushText();
            blocks.push({ type: 'image', src: img });
            return;
          }
          const table = parseTableMarker(line);
          if (table) {
            flushText();
            blocks.push({ type: 'table', rows: table });
            return;
          }
          textBuffer.push(line);
        });

        flushText();
        return blocks;
      }

      function renderTableHtml(rows) {
        const safeRows = Array.isArray(rows) ? rows : [];
        if (!safeRows.length) return '';
        const body = safeRows.map((row) => `<tr>${(Array.isArray(row) ? row : []).map((cell) => `<td>${escapeHtml(cell)}</td>`).join('')}</tr>`).join('');
        return `<table class="qgen-embedded-table">${body}</table>`;
      }

      function renderPromptHtml(prompt, displayNumber) {
        const blocks = extractRichBlocks(prompt);
        const firstTextIndex = blocks.findIndex((block) => block && block.type === 'text' && String(block.text || '').trim());
        let html = '';
        if (firstTextIndex === -1) html += `<p class="qgen-question-line"><strong>Câu ${displayNumber}.</strong></p>`;
        let usedFirst = false;
        blocks.forEach((block, blockIndex) => {
          if (!block) return;
          if (block.type === 'text') {
            const lines = String(block.text || '').split(/\n+/).filter((line) => line.trim());
            lines.forEach((line, lineIndex) => {
              if (!usedFirst && blockIndex === firstTextIndex && lineIndex === 0) {
                html += `<p class="qgen-question-line"><strong>Câu ${displayNumber}.</strong>${line ? ' ' + renderFormattedInlineHtml(line) : ''}</p>`;
                usedFirst = true;
              } else {
                html += `<p>${renderFormattedInlineHtml(line)}</p>`;
              }
            });
          } else if (block.type === 'image' && block.src) {
            html += `<img class="qgen-embedded-image" src="${escapeHtml(block.src)}" alt="Hình minh họa câu hỏi">`;
          } else if (block.type === 'table' && block.rows) {
            html += renderTableHtml(block.rows);
          }
        });
        return html;
      }

      function renderOptionHtml(option) {
        const blocks = extractRichBlocks(option && option.text || '');
        const firstTextIndex = blocks.findIndex((block) => block && block.type === 'text' && String(block.text || '').trim());
        let html = '<div class="qgen-option-block">';
        if (firstTextIndex === -1) html += `<p class="qgen-option-line"><span class="qgen-option-letter">${escapeHtml(option.new_letter)}.</span></p>`;
        let usedFirst = false;
        blocks.forEach((block, blockIndex) => {
          if (!block) return;
          if (block.type === 'text') {
            const lines = String(block.text || '').split(/\n+/).filter((line) => line.trim());
            lines.forEach((line, lineIndex) => {
              if (!usedFirst && blockIndex === firstTextIndex && lineIndex === 0) {
                html += `<p class="qgen-option-line"><span class="qgen-option-letter">${escapeHtml(option.new_letter)}.</span> ${renderFormattedInlineHtml(line)}</p>`;
                usedFirst = true;
              } else {
                html += `<p>${renderFormattedInlineHtml(line)}</p>`;
              }
            });
          } else if (block.type === 'image' && block.src) {
            html += `<img class="qgen-embedded-image" src="${escapeHtml(block.src)}" alt="Hình minh họa đáp án">`;
          } else if (block.type === 'table' && block.rows) {
            html += renderTableHtml(block.rows);
          }
        });
        html += '</div>';
        return html;
      }

      function renderSimpleInlineOptionHtml(option) {
        return `<div class="qgen-option-inline-item"><p class="qgen-option-line"><span class="qgen-option-letter">${escapeHtml(option.new_letter)}.</span> ${renderFormattedInlineHtml(normalizeInlineText(option && option.text || ''))}</p></div>`;
      }

      function renderQuestionOptionsHtml(options) {
        const layout = buildOptionLayout(options, OPTION_WRAP_WIDTH);
        if (layout.mode === 'row4') {
          return `<div class="qgen-option-layout qgen-option-layout-row4">${layout.pieces.map((item) => renderSimpleInlineOptionHtml(item.raw)).join('')}</div>`;
        }
        if (layout.mode === 'grid2') {
          return `<div class="qgen-option-layout qgen-option-layout-grid2">${layout.pieces.map((item) => renderSimpleInlineOptionHtml(item.raw)).join('')}</div>`;
        }
        return (Array.isArray(options) ? options : []).map((opt) => renderOptionHtml(opt)).join('');
      }

      function dataUrlToUint8Array(dataUrl) {
        const value = String(dataUrl || '');
        const commaIndex = value.indexOf(',');
        if (commaIndex === -1) return new Uint8Array();
        const binary = atob(value.slice(commaIndex + 1));
        const bytes = new Uint8Array(binary.length);
        for (let i = 0; i < binary.length; i += 1) bytes[i] = binary.charCodeAt(i);
        return bytes;
      }

      function getImageDimensionsFromDataUrl(dataUrl) {
        return new Promise((resolve) => {
          try {
            const img = new Image();
            img.onload = () => resolve({ width: img.naturalWidth || 320, height: img.naturalHeight || 200 });
            img.onerror = () => resolve({ width: 320, height: 200 });
            img.src = dataUrl;
          } catch (err) {
            resolve({ width: 320, height: 200 });
          }
        });
      }

      function fitImageSize(width, height, maxWidth, maxHeight) {
        const safeWidth = Math.max(1, Number(width) || 320);
        const safeHeight = Math.max(1, Number(height) || 200);
        const ratio = Math.min(maxWidth / safeWidth, maxHeight / safeHeight, 1);
        return { width: Math.max(80, Math.round(safeWidth * ratio)), height: Math.max(60, Math.round(safeHeight * ratio)) };
      }

      function parseQuestionBlock(lines) {
        const cleanLines = (Array.isArray(lines) ? lines : []).map((line) => String(line || '').replace(/\s+$/g, ''));
        if (!cleanLines.length) return null;

        const firstLine = cleanLines[0].trim();
        const qMatch = firstLine.match(/^(Câu|Cau)\s*(\d+)\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]\s*(.*)$/i);
        if (!qMatch) return null;

        let answerIndex = -1;
        for (let i = cleanLines.length - 1; i >= 0; i -= 1) {
          if (/^Đáp án\s*:/i.test(cleanLines[i].trim())) {
            answerIndex = i;
            break;
          }
        }
        if (answerIndex === -1) return null;

        const answerMatch = cleanLines[answerIndex].trim().match(/^Đáp án\s*:\s*([ABCD])\s*$/i);
        if (!answerMatch) return null;

        const preAnswerLines = cleanLines.slice(1, answerIndex);
        const optionPositions = {};
        preAnswerLines.forEach((line, idx) => {
          const match = line.trim().match(/^([ABCD])\.\s*/i);
          if (!match) return;
          const letter = normalizeLetter(match[1]);
          if (optionPositions[letter] === undefined) optionPositions[letter] = idx;
        });
        if ([ 'A', 'B', 'C', 'D' ].some((letter) => optionPositions[letter] === undefined)) return null;

        const orderedStarts = LETTERS.map((letter) => optionPositions[letter]);
        const promptLines = [];
        const leadText = qMatch[3].trim();
        if (leadText) promptLines.push(leadText);
        preAnswerLines.slice(0, orderedStarts[0]).forEach((line) => {
          if (line.trim()) promptLines.push(line);
        });

        const options = [];
        for (let i = 0; i < LETTERS.length; i += 1) {
          const letter = LETTERS[i];
          const start = orderedStarts[i];
          const end = i < LETTERS.length - 1 ? orderedStarts[i + 1] : preAnswerLines.length;
          const chunk = preAnswerLines.slice(start, end);
          if (!chunk.length) return null;
          const first = chunk[0].trim();
          const match = first.match(/^([ABCD])\.\s*(.*)$/i);
          if (!match) return null;
          const optionText = [match[2], ...chunk.slice(1)].join('\n').trim();
          options.push({ letter, text: optionText });
        }

        return {
          original_number: Number(qMatch[2]),
          prompt: promptLines.join('\n').trim(),
          options,
          correct: normalizeLetter(answerMatch[1]),
        };
      }

      function parseTrueFalseAnswerTokens(value) {
        const text = String(value || '')
          .replace(/[;,|]+/g, ' ')
          .replace(/\s+/g, ' ')
          .trim();
        if (!text) return [];
        const tokens = text.split(' ').map((part) => part.trim()).filter(Boolean);
        const out = [];
        tokens.forEach((token) => {
          const upper = token.toUpperCase();
          const noAccent = upper.normalize ? upper.normalize('NFD').replace(/[\u0300-\u036f]/g, '') : upper;
          if (upper === 'Đ' || upper === 'D' || noAccent === 'DUNG' || noAccent === 'TRUE' || upper === 'T') out.push('D');
          else if (upper === 'A' || upper === 'B' || upper === 'C' || upper === 'S' || noAccent === 'SAI' || noAccent === 'FALSE' || upper === 'F') out.push('A');
        });
        if (out.length === 4) return out;
        const compact = text.replace(/\s+/g, '').toUpperCase();
        if (/^[ABCDĐDSTF]{4}$/.test(compact)) {
          return compact.split('').map((token) => (token === 'Đ' || token === 'D' || token === 'T') ? 'D' : 'A');
        }
        return out;
      }

      function parseTrueFalseQuestionBlock(lines) {
        const cleanLines = (Array.isArray(lines) ? lines : []).map((line) => String(line || '').replace(/\s+$/g, ''));
        if (!cleanLines.length) return null;
        const firstLine = cleanLines[0].trim();
        const qMatch = firstLine.match(/^(Câu|Cau)\s*(\d+)\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]\s*(.*)$/i);
        if (!qMatch) return null;
        let answerIndex = -1;
        for (let i = cleanLines.length - 1; i >= 0; i -= 1) {
          if (/^Đáp án\s*:/i.test(cleanLines[i].trim())) {
            answerIndex = i;
            break;
          }
        }
        if (answerIndex === -1) return null;
        const answerMatch = cleanLines[answerIndex].trim().match(/^Đáp án\s*:\s*(.+)$/i);
        const correct = parseTrueFalseAnswerTokens(answerMatch && answerMatch[1]);
        if (correct.length !== 4) return null;
        const preAnswerLines = cleanLines.slice(1, answerIndex);
        const statementLetters = ['a', 'b', 'c', 'd'];
        const positions = {};
        preAnswerLines.forEach((line, idx) => {
          const match = line.trim().match(/^([a-d])[\.\)]\s*/i);
          if (!match) return;
          const letter = String(match[1] || '').toLowerCase();
          if (positions[letter] === undefined) positions[letter] = idx;
        });
        if (statementLetters.some((letter) => positions[letter] === undefined)) return null;
        const orderedStarts = statementLetters.map((letter) => positions[letter]);
        const promptLines = [];
        const leadText = qMatch[3].trim();
        if (leadText) promptLines.push(leadText);
        preAnswerLines.slice(0, orderedStarts[0]).forEach((line) => {
          if (line.trim()) promptLines.push(line);
        });
        const options = [];
        for (let i = 0; i < statementLetters.length; i += 1) {
          const letter = statementLetters[i];
          const start = orderedStarts[i];
          const end = i < statementLetters.length - 1 ? orderedStarts[i + 1] : preAnswerLines.length;
          const chunk = preAnswerLines.slice(start, end);
          const match = String(chunk[0] || '').trim().match(/^([a-d])[\.\)]\s*(.*)$/i);
          if (!match) return null;
          options.push({ letter, new_letter: letter, text: [match[2], ...chunk.slice(1)].join('\n').trim() });
        }
        return {
          type: 'true_false',
          original_number: Number(qMatch[2]),
          prompt: promptLines.join('\n').trim(),
          options,
          correct,
        };
      }

      function parseShortQuestionBlock(lines) {
        const cleanLines = (Array.isArray(lines) ? lines : []).map((line) => String(line || '').replace(/\s+$/g, ''));
        if (!cleanLines.length) return null;
        const firstLine = cleanLines[0].trim();
        const qMatch = firstLine.match(/^(Câu|Cau)\s*(\d+)\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]\s*(.*)$/i);
        if (!qMatch) return null;
        let answerIndex = -1;
        for (let i = cleanLines.length - 1; i >= 0; i -= 1) {
          if (/^Đáp án\s*:/i.test(cleanLines[i].trim())) {
            answerIndex = i;
            break;
          }
        }
        const bodyLines = answerIndex >= 0 ? cleanLines.slice(1, answerIndex) : cleanLines.slice(1);
        const answerMatch = answerIndex >= 0 ? cleanLines[answerIndex].trim().match(/^Đáp án\s*:\s*(.+)$/i) : null;
        const promptLines = [];
        const leadText = qMatch[3].trim();
        if (leadText) promptLines.push(leadText);
        bodyLines.forEach((line) => { if (line.trim()) promptLines.push(line); });
        return {
          type: 'short',
          original_number: Number(qMatch[2]),
          prompt: promptLines.join('\n').trim(),
          options: [],
          correct: 'A',
          answerText: answerMatch ? String(answerMatch[1] || '').trim() : '',
        };
      }

      function parseEssayQuestionBlock(lines) {
        const cleanLines = (Array.isArray(lines) ? lines : []).map((line) => String(line || '').replace(/\s+$/g, ''));
        if (!cleanLines.length) return null;
        const firstLine = cleanLines[0].trim();
        const qMatch = firstLine.match(/^(Câu|Cau)\s*(\d+)\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]\s*(.*)$/i);
        if (!qMatch) return null;
        const promptLines = [];
        const leadText = qMatch[3].trim();
        if (leadText) promptLines.push(leadText);
        cleanLines.slice(1).forEach((line) => { if (line.trim()) promptLines.push(line); });
        return {
          type: 'essay',
          original_number: Number(qMatch[2]),
          prompt: promptLines.join('\n').trim(),
          options: [],
          correct: '',
        };
      }

      function parseQuestions(text) {
        return parseQuestionsForType(text, 'single');
      }

      function parseQuestionsForType(text, type) {
        const lines = String(text || '').replace(/\r/g, '').split('\n');
        const results = [];
        let block = [];

        function flushBlock() {
          const normalizedType = String(type || 'single');
          const parsed = normalizedType === 'true_false'
            ? parseTrueFalseQuestionBlock(block)
            : (normalizedType === 'short'
              ? parseShortQuestionBlock(block)
              : (normalizedType === 'essay' ? parseEssayQuestionBlock(block) : parseQuestionBlock(block)));
          if (parsed) results.push(parsed);
          block = [];
        }

        lines.forEach((rawLine) => {
          const line = String(rawLine || '').replace(/\s+$/g, '');
          const trimmed = line.trim();
          if (!trimmed) {
            if (block.length) block.push('');
            return;
          }
          if (/^(PHẦN|PHAN)\s*(\d+|[IVXLCDM]+)\b/i.test(trimmed)) {
            if (block.length) flushBlock();
            return;
          }
          if (/^(Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i.test(trimmed)) {
            if (block.length) flushBlock();
            block = [trimmed];
            return;
          }
          if (block.length) block.push(line);
        });

        if (block.length) flushBlock();
        return results;
      }

      function detectQuestionTypeHeader(line) {
        const normalized = String(line || '').replace(/\s+/g, ' ').trim();
        if (!normalized) return null;
        const lowered = normalized.toLowerCase();
        if (/^(mục|muc)\s*i\b/i.test(normalized) || lowered.includes('trắc nghiệm 01') || lowered.includes('trac nghiem 01') || lowered.includes('một lựa chọn') || lowered.includes('mot lua chon')) return 'single';
        if (/^(mục|muc)\s*ii\b/i.test(normalized) || lowered.includes('đúng/sai') || lowered.includes('đúng sai') || lowered.includes('dung sai')) return 'true_false';
        if (/^(mục|muc)\s*iii\b/i.test(normalized) || lowered.includes('trả lời ngắn') || lowered.includes('tra loi ngan')) return 'short';
        if (/^(mục|muc)\s*iv\b/i.test(normalized) || lowered.includes('tự luận') || lowered.includes('tu luan')) return 'essay';
        return null;
      }

      function parseQuestionsByTypeAndCategory(text) {
        const lines = String(text || '').replace(/\r/g, '').split('\n');
        const buckets = Object.fromEntries(QUESTION_TYPE_ORDER.map(([type]) => [
          type,
          Object.fromEntries(CATEGORY_ORDER.map(([level]) => [level, []])),
        ]));
        const fallbackSections = Object.fromEntries(CATEGORY_ORDER.map(([level]) => [level, []]));
        let currentType = '';
        let currentCategory = '';
        let foundTypeHeader = false;
        let foundCategoryHeader = false;
        const fallbackLines = [];

        lines.forEach((line) => {
          const typeHeader = detectQuestionTypeHeader(line);
          if (typeHeader) {
            currentType = typeHeader;
            currentCategory = '';
            foundTypeHeader = true;
            return;
          }
          const category = detectCategoryHeader(line);
          if (category) {
            currentCategory = category;
            foundCategoryHeader = true;
            return;
          }
          if (currentType && currentCategory) buckets[currentType][currentCategory].push(line);
          else if (!currentType && currentCategory) fallbackSections[currentCategory].push(line);
          else fallbackLines.push(line);
        });

        if (!foundTypeHeader) {
          return { typedMode: false, sectionedMode: foundCategoryHeader, pools: null, fallback: parseQuestionsByCategory(text) };
        }

        const parsed = Object.fromEntries(QUESTION_TYPE_ORDER.map(([type]) => [
          type,
          Object.fromEntries(CATEGORY_ORDER.map(([level]) => [level, parseQuestionsForType(buckets[type][level].join('\n'), type)])),
        ]));

        if (foundCategoryHeader) {
          CATEGORY_ORDER.forEach(([level]) => {
            const extraSingle = parseQuestionsForType(fallbackSections[level].join('\n'), 'single');
            if (extraSingle.length) parsed.single[level].push(...extraSingle);
          });
        }

        return { typedMode: true, sectionedMode: true, pools: parsed, extraPool: parseQuestionsForType(fallbackLines.join('\n'), 'single') };
      }

      function detectCategoryHeader(line) {
        const normalized = String(line || '').replace(/\s+/g, ' ').trim();
        if (!normalized) return null;
        if (!/^(PHẦN|PHAN)\s*(\d+|[IVXLCDM]+)\b/i.test(normalized)) return null;
        const lowered = normalized.toLowerCase();
        if (lowered.includes('vận dụng cao') || lowered.includes('van dung cao')) return 'van_dung_cao';
        if (lowered.includes('vận dụng') || lowered.includes('van dung')) return 'van_dung';
        if (lowered.includes('thông hiểu') || lowered.includes('thong hieu')) return 'thong_hieu';
        if (lowered.includes('nhận biết') || lowered.includes('nhan biet')) return 'nhan_biet';
        return null;
      }

      function parseQuestionsByCategory(text) {
        const lines = String(text || '').replace(/\r/g, '').split('\n');
        const sections = Object.fromEntries(CATEGORY_ORDER.map(([key]) => [key, []]));
        let currentCategory = null;
        let foundHeader = false;
        const uncategorized = [];

        lines.forEach((line) => {
          const category = detectCategoryHeader(line);
          if (category) {
            currentCategory = category;
            foundHeader = true;
            return;
          }
          if (currentCategory) sections[currentCategory].push(line);
          else uncategorized.push(line);
        });

        if (!foundHeader) {
          return { sectionedMode: false, pools: Object.fromEntries(CATEGORY_ORDER.map(([key]) => [key, []])), extraPool: parseQuestions(text) };
        }

        const parsed = {};
        CATEGORY_ORDER.forEach(([key]) => {
          parsed[key] = parseQuestions(sections[key].join('\n'));
        });
        const uncText = uncategorized.join('\n').trim();
        const extraPool = uncText ? parseQuestions(uncText) : [];
        return { sectionedMode: true, pools: parsed, extraPool };
      }

      function readNonNegativeInt(input, label) {
        const value = parseInt(String((input && input.value) || '0'), 10);
        if (Number.isNaN(value)) throw new Error(`${label} phải là số nguyên.`);
        if (value < 0) throw new Error(`${label} không được âm.`);
        return value;
      }

      function readNonNegativeNumber(input, label) {
        const value = Number(String((input && input.value) || '0').replace(',', '.'));
        if (Number.isNaN(value)) throw new Error(`${label} phải là số.`);
        if (value < 0) throw new Error(`${label} không được âm.`);
        return value;
      }

      function readTypeCounts(prefix, label) {
        return {
          nhan_biet: readNonNegativeInt(els[`${prefix}NhanBiet`], `${label} - nhận biết`),
          thong_hieu: readNonNegativeInt(els[`${prefix}ThongHieu`], `${label} - thông hiểu`),
          van_dung: readNonNegativeInt(els[`${prefix}VanDung`], `${label} - vận dụng`),
          van_dung_cao: readNonNegativeInt(els[`${prefix}VanDungCao`], `${label} - vận dụng cao`),
        };
      }

      function getTrueFalseScoreMode() {
        const checked = document.querySelector('input[name="qgenTrueFalseScoreMode"]:checked');
        return checked && checked.value === 'per_statement' ? 'per_statement' : 'tiered';
      }

      function getStructuredExamBuildConfig() {
        const config = {
          single: {
            type: 'single',
            label: 'Mục I. Trắc nghiệm 01 lựa chọn',
            counts: readTypeCounts('single', 'Mục I'),
            scorePerQuestion: readNonNegativeNumber(els.singleScore, 'Điểm mỗi câu Mục I'),
          },
          true_false: {
            type: 'true_false',
            label: 'Mục II. Trắc nghiệm đúng/sai',
            counts: readTypeCounts('trueFalse', 'Mục II'),
            scoreMode: getTrueFalseScoreMode(),
            statementScore: readNonNegativeNumber(els.trueFalseStatementScore, 'Điểm mỗi ý đúng Mục II'),
          },
          short: {
            type: 'short',
            label: 'Mục III. Trả lời ngắn',
            counts: readTypeCounts('short', 'Mục III'),
            scorePerQuestion: readNonNegativeNumber(els.shortScore, 'Điểm mỗi câu Mục III'),
          },
          essay: {
            type: 'essay',
            label: 'Mục IV. Tự luận',
            counts: readTypeCounts('essay', 'Mục IV'),
          },
        };
        const totalsByLevel = Object.fromEntries(CATEGORY_ORDER.map(([key]) => [key, 0]));
        QUESTION_TYPE_ORDER.forEach(([type]) => {
          CATEGORY_ORDER.forEach(([level]) => {
            totalsByLevel[level] += Number((config[type].counts && config[type].counts[level]) || 0);
          });
        });
        config.totalPrintQuestions = QUESTION_TYPE_ORDER.reduce((sum, [type]) => {
          return sum + CATEGORY_ORDER.reduce((inner, [level]) => inner + Number((config[type].counts && config[type].counts[level]) || 0), 0);
        }, 0);
        const singleScan = CATEGORY_ORDER.reduce((sum, [level]) => sum + Number(config.single.counts[level] || 0), 0);
        const trueFalseScan = CATEGORY_ORDER.reduce((sum, [level]) => sum + Number(config.true_false.counts[level] || 0), 0) * 4;
        const shortScan = CATEGORY_ORDER.reduce((sum, [level]) => sum + Number(config.short.counts[level] || 0), 0);
        config.totalScanItems = singleScan + trueFalseScan + shortScan;
        config.totalsByLevel = totalsByLevel;
        state.structuredExamConfig = config;
        return config;
      }

      function hasNonSingleRequested(buildConfig) {
        return ['true_false', 'short', 'essay'].some((type) => {
          const cfg = buildConfig && buildConfig[type];
          return CATEGORY_ORDER.some(([level]) => Number((cfg && cfg.counts && cfg.counts[level]) || 0) > 0);
        });
      }

      function getConfigCounts() {
        return getStructuredExamBuildConfig().totalsByLevel;
      }

      function sampleWithoutReplacement(arr, count) {
        return shuffleArray(arr).slice(0, count);
      }

      function buildVersion(selectedQuestions, versionIndex, preserveOrder = false) {
        const shuffledQuestions = preserveOrder ? (Array.isArray(selectedQuestions) ? selectedQuestions.slice() : []) : shuffleArray(selectedQuestions);
        const builtQuestions = shuffledQuestions.map((question, idx) => {
          const qType = String(question.type || 'single');
          if (qType !== 'single') {
            return {
              display_number: idx + 1,
              type: qType,
              prompt: question.prompt,
              options: Array.isArray(question.options) ? question.options.map((opt) => ({ new_letter: opt.new_letter || opt.letter || '', text: opt.text || '' })) : [],
              correct: question.correct,
              answerText: question.answerText || '',
            };
          }
          const optionsWithFlag = question.options.map((opt) => ({ text: opt.text, isCorrect: opt.letter === question.correct }));
          const shuffledOptions = shuffleArray(optionsWithFlag);
          let correctLetter = '?';
          const newOptions = shuffledOptions.map((opt, i) => {
            const letter = LETTERS[i];
            if (opt.isCorrect) correctLetter = letter;
            return { new_letter: letter, text: opt.text };
          });
          return {
            display_number: idx + 1,
            type: 'single',
            prompt: question.prompt,
            options: newOptions,
            correct: correctLetter,
          };
        });

        if (preserveOrder) {
          let lastType = '';
          const typeLabelMap = Object.fromEntries(QUESTION_TYPE_ORDER);
          builtQuestions.forEach((question) => {
            const qType = String(question.type || 'single');
            if (qType !== lastType) {
              question.section_label = typeLabelMap[qType] || '';
              lastType = qType;
            }
          });
        }

        return {
          code: String(versionIndex + 1).padStart(2, '0'),
          questions: builtQuestions,
          answer_key: buildScanAnswerKey(builtQuestions),
        };
      }

      function buildScanAnswerKey(questions) {
        const parts = [];
        (Array.isArray(questions) ? questions : []).forEach((question) => {
          const qType = String(question && question.type || 'single');
          if (qType === 'essay') return;
          if (qType === 'true_false') {
            const arr = Array.isArray(question.correct) ? question.correct : [];
            arr.forEach((item) => {
              const value = String(item || '').trim().toUpperCase();
              const logic = trueFalseCardDisplayValue(value);
              parts.push(logic === 'Đ' ? 'D' : 'A');
            });
            return;
          }
          if (qType === 'short') {
            parts.push('A');
            return;
          }
          parts.push(String(question.correct || '').trim().toUpperCase());
        });
        return parts.join('');
      }

      function buildVersionFromCategories(pools, configCounts, versionIndex) {
        const selected = [];
        for (const [key, label] of CATEGORY_ORDER) {
          const need = Number(configCounts[key] || 0);
          if (need <= 0) continue;
          const pool = pools[key] || [];
          if (need > pool.length) {
            throw new Error(`Không đủ câu ở phần '${label}': cần ${need}, hiện có ${pool.length}.`);
          }
          selected.push(...sampleWithoutReplacement(pool, need));
        }
        return buildVersion(selected, versionIndex);
      }

      function buildVersionFromStructuredPools(pools, buildConfig, versionIndex) {
        const selected = [];
        for (const [type, typeLabel] of QUESTION_TYPE_ORDER) {
          const typeCfg = buildConfig && buildConfig[type] ? buildConfig[type] : null;
          const typeQuestions = [];
          for (const [level, levelLabel] of CATEGORY_ORDER) {
            const need = Number((typeCfg && typeCfg.counts && typeCfg.counts[level]) || 0);
            if (need <= 0) continue;
            const pool = (pools && pools[type] && pools[type][level]) || [];
            if (need > pool.length) {
              throw new Error(`Không đủ câu ở ${typeLabel} - ${levelLabel}: cần ${need}, hiện có ${pool.length}.`);
            }
            typeQuestions.push(...sampleWithoutReplacement(pool, need));
          }
          selected.push(...shuffleArray(typeQuestions));
        }
        return buildVersion(selected, versionIndex, true);
      }

      function isSimpleInlineOption(option) {
        const blocks = extractRichBlocks(option && option.text || '');
        if (!blocks.length) return true;
        let lineCount = 0;
        for (const block of blocks) {
          if (!block) continue;
          if (block.type === 'image' || block.type === 'table') return false;
          if (block.type === 'text') {
            const lines = String(block.text || '').split(/\n+/).map((line) => line.trim()).filter(Boolean);
            lineCount += lines.length;
            if (lineCount > 1) return false;
          }
        }
        return true;
      }

      function getOptionDisplayText(option) {
        return `${option.new_letter}. ${normalizeInlineText(option && option.text || '')}`.trim();
      }

      function estimateMathDisplayWidth(text) {
        const value = normalizeInlineText(text || '');
        const compact = value
          .replace(/\$([^$]+)\$/g, '$1')
          .replace(/\\(?:dfrac|tfrac|frac)\s*\{([^{}]*)\}\s*\{([^{}]*)\}/g, (full, top, bottom) => {
            return ' '.repeat(Math.max(String(top || '').length, String(bottom || '').length) + 2);
          })
          .replace(/\\sqrt\s*\{([^{}]*)\}/g, (full, inner) => `sqrt${inner || ''}`)
          .replace(/\\(?:left|right|cdot|times|div|angle|circ|degree|pi|alpha|beta|gamma|Delta|leq|geq|neq|infty|sum|overline|widehat|overrightarrow|overparen|vec)\b/g, 'x')
          .replace(/[{}\\]/g, '');
        return compact.length;
      }

      function buildOptionLayout(options, width) {
        const pieces = (Array.isArray(options) ? options : []).map((opt) => ({
          raw: opt,
          display: getOptionDisplayText(opt),
          measure: estimateMathDisplayWidth(getOptionDisplayText(opt)),
          simple: isSimpleInlineOption(opt),
        }));
        if (pieces.length !== 4 || pieces.some((item) => !item.simple)) {
          return { mode: 'stack', pieces };
        }
        const totalLen = pieces.reduce((sum, item) => sum + item.measure, 0) + OPTION_GAP.length * (pieces.length - 1);
        if (totalLen <= width) return { mode: 'row4', pieces };

        const leftWidth = Math.max(pieces[0].measure, pieces[2].measure);
        const rightWidth = Math.max(pieces[1].measure, pieces[3].measure);
        if (leftWidth <= 28 && rightWidth <= 28 && leftWidth + OPTION_GAP.length + rightWidth <= width) {
          return { mode: 'grid2', pieces, leftWidth, rightWidth };
        }
        return { mode: 'stack', pieces };
      }

      function renderOptionLinesForText(options, width) {
        const layout = buildOptionLayout(options, width);
        if (layout.mode === 'row4') return [layout.pieces.map((item) => item.display).join(OPTION_GAP)];
        if (layout.mode === 'grid2') {
          const leftWidth = layout.leftWidth || 0;
          return [
            `${layout.pieces[0].display.padEnd(leftWidth, ' ')}${OPTION_GAP}${layout.pieces[1].display}`,
            `${layout.pieces[2].display.padEnd(leftWidth, ' ')}${OPTION_GAP}${layout.pieces[3].display}`,
          ];
        }
        return (Array.isArray(options) ? options : []).map((opt) => getOptionDisplayText(opt));
      }

      function renderVersionText(version, examTitle) {
        const lines = [];
        lines.push(`MÃ ĐỀ ${version.code}`);
        lines.push('');
        lines.push((examTitle || '').trim() || 'Kiểm tra');
        lines.push('');
        lines.push('Họ và tên:');
        lines.push('...............................................................................');
        lines.push('Lớp:');
        lines.push('...............');
        lines.push('');
        lines.push('Khoanh tròn vào chữ cái đứng trước câu trả lời đúng');
        lines.push('');

        version.questions.forEach((question) => {
          if (question.section_label) {
            lines.push('');
            lines.push(String(question.section_label || '').toUpperCase());
            lines.push('');
          }
          const promptLines = question.prompt ? question.prompt.split(/\n+/) : [];
          if (promptLines.length) {
            lines.push(`Câu ${question.display_number}. ${promptLines[0]}`);
            promptLines.slice(1).forEach((line) => lines.push(line));
          } else {
            lines.push(`Câu ${question.display_number}.`);
          }
          renderOptionLinesForText(question.options, OPTION_WRAP_WIDTH).forEach((line) => lines.push(line));
          lines.push('');
        });
        return lines.join('\n').trim();
      }

      function renderAllVersionsText(versions, examTitle) {
        const body = versions.map((version) => renderVersionText(version, examTitle)).join('\n\n------------------------------\n\n');
        const answers = ['ĐÁP ÁN', '', ...versions.map((version) => `${version.code}: ${version.answer_key}`)].join('\n');
        return `${body}\n\n==============================\n\n${answers}`;
      }

      function deriveClassLabelFromMon(mon) {
        const value = normMonKey(mon || '');
        if (!value) return '';
        const parts = value.split(/[-_–—]/).map((part) => part.trim()).filter(Boolean);
        if (parts.length >= 2) return parts[parts.length - 1] || value;
        const trailingClass = value.match(/(?:^|\s)(\d{1,2}[A-Za-zÀ-ỹ]*)\s*$/);
        if (trailingClass) return trailingClass[1];
        return value;
      }

      function buildGeneratedStudentAssignments() {
        const selectedMons = selectedExamMonsFromChecklist();
        const versionMap = Object.fromEntries((state.versions || []).map((version) => [String(version.code || '').trim(), version]));
        const fallbackCodes = (state.versions || []).map((version) => String(version.code || '').trim()).filter(Boolean);
        const assignments = [];

        selectedMons.forEach((mon) => {
          const students = classDataStudents(mon);
          const studentIds = sortedStudentKeysFromMap(students);
          if (!studentIds.length) return;

          const cfg = selectedExamConfigForMon(mon) || latestExamConfigForMon(mon) || emptyExamConfig();
          const assignedCodes = (cfg && cfg.studentCodes && Object.keys(cfg.studentCodes).length)
            ? cfg.studentCodes
            : buildEvenCodeAssignments(students, fallbackCodes);
          const classLabel = deriveClassLabelFromMon(mon);

          studentIds.forEach((so, index) => {
            const assignedCode = String((assignedCodes && assignedCodes[so]) || fallbackCodes[index % Math.max(1, fallbackCodes.length)] || '').trim();
            const version = versionMap[assignedCode] || null;
            if (!version) return;
            assignments.push({
              mon,
              classLabel,
              studentId: so,
              studentName: String(students[so] || '').trim(),
              code: assignedCode,
              version,
            });
          });
        });

        return assignments;
      }

      function renderStudentAssignmentText(item, examTitle) {
        const version = item && item.version ? item.version : null;
        if (!version) return '';
        const lines = [];
        lines.push(`MÃ ĐỀ ${version.code}`);
        lines.push('');
        lines.push((examTitle || '').trim() || 'Kiểm tra');
        lines.push('');
        lines.push(`Họ và tên: ${String((item && item.studentName) || '').trim()}`);
        lines.push(`Lớp: ${String((item && item.classLabel) || '').trim()}`);
        lines.push('');
        lines.push('Khoanh tròn vào chữ cái đứng trước câu trả lời đúng');
        lines.push('');

        version.questions.forEach((question) => {
          if (question.section_label) {
            lines.push('');
            lines.push(String(question.section_label || '').toUpperCase());
            lines.push('');
          }
          const promptLines = question.prompt ? question.prompt.split(/\n+/) : [];
          if (promptLines.length) {
            lines.push(`Câu ${question.display_number}. ${promptLines[0]}`);
            promptLines.slice(1).forEach((line) => lines.push(line));
          } else {
            lines.push(`Câu ${question.display_number}.`);
          }
          renderOptionLinesForText(question.options, OPTION_WRAP_WIDTH).forEach((line) => lines.push(line));
          lines.push('');
        });
        return lines.join('\n').trim();
      }

      function renderGeneratedAssignmentsText(assignments, examTitle) {
        if (!Array.isArray(assignments) || !assignments.length) return renderAllVersionsText(state.versions || [], examTitle);
        const body = assignments.map((item) => renderStudentAssignmentText(item, examTitle)).join('\n\n------------------------------\n\n');
        const answers = ['ĐÁP ÁN', '', ...(state.versions || []).map((version) => `${version.code}: ${version.answer_key}`)].join('\n');
        return `${body}\n\n==============================\n\n${answers}`;
      }

      function escapeHtml(value) {
        return String(value || '')
          .replace(/&/g, '&amp;')
          .replace(/</g, '&lt;')
          .replace(/>/g, '&gt;')
          .replace(/"/g, '&quot;')
          .replace(/'/g, '&#39;');
      }

      function renderPreview(versions, examTitle, includeStudentInfo) {
        if (!versions.length) {
          els.preview.innerHTML = '<div class="qgen-preview-empty">Chưa có dữ liệu để hiển thị.</div>';
          return;
        }
        const assignments = includeStudentInfo ? buildGeneratedStudentAssignments() : [];
        const previewItems = assignments.length
          ? assignments.map((item) => ({ version: item.version, studentName: item.studentName, classLabel: item.classLabel }))
          : versions.map((version) => ({ version, studentName: '', classLabel: '' }));

        const sections = previewItems.map((item) => {
          const version = item.version;
          const questionHtml = version.questions.map((question) => `
              ${question.section_label ? `<h4 class="qgen-type-heading">${escapeHtml(question.section_label)}</h4>` : ''}
              <div class="qgen-question">
                ${renderPromptHtml(question.prompt || '', question.display_number)}
                ${renderQuestionOptionsHtml(question.options)}
              </div>`).join('');
          const studentName = String(item.studentName || '').trim();
          const classLabel = String(item.classLabel || '').trim();
          return `
            <section class="qgen-version">
              <h3 class="qgen-version-title">MÃ ĐỀ ${escapeHtml(version.code)}</h3>
              <div class="qgen-exam-title">${escapeHtml((examTitle || '').trim() || 'Kiểm tra')}</div>
              <div class="qgen-meta">
                <p>Họ và tên: ${studentName ? escapeHtml(studentName) : '.......................................................................'}</p>
                <p>Lớp: ${classLabel ? escapeHtml(classLabel) : '...............'}</p>
              </div>
              <p class="qgen-note">Khoanh tròn vào chữ cái đứng trước câu trả lời đúng</p>
              ${questionHtml}
            </section>`;
        }).join('');

        const answerHtml = versions.map((version) => `<span class="qgen-answer-chip">${escapeHtml(version.code)}: ${escapeHtml(version.answer_key)}</span>`).join('');
        els.preview.innerHTML = `${sections}<div class="qgen-answer-box"><h4>ĐÁP ÁN</h4>${answerHtml}</div>`;
      }

      async function handleGenerate(includeStudentInfo) {
        state.includeStudentInfo = includeStudentInfo !== false;
        const selectedMons = selectedExamMonsFromChecklist();
        if (!selectedMons.length) {
          setStatus('Bạn chưa chọn Lớp-Môn.', 'err');
          alert('Bạn chưa chọn Lớp-Môn.');
          return;
        }

        const source = String(els.input.value || '').trim();
        if (!source) {
          setStatus('Bạn chưa nhập bộ câu hỏi.', 'err');
          alert('Bạn chưa nhập bộ câu hỏi.');
          return;
        }

        const count = parseInt(String(els.versionCount.value || '0'), 10);
        if (Number.isNaN(count) || count < 1) {
          setStatus('Số đề phải lớn hơn hoặc bằng 1.', 'err');
          alert('Số đề phải lớn hơn hoặc bằng 1.');
          return;
        }

        let configCounts;
        let buildConfig;
        try {
          buildConfig = getStructuredExamBuildConfig();
          configCounts = buildConfig.totalsByLevel;
        } catch (err) {
          setStatus(err.message, 'err');
          alert(err.message);
          return;
        }

        const totalRequested = Object.values(configCounts).reduce((sum, value) => sum + value, 0);
        if (totalRequested <= 0) {
          setStatus('Bạn chưa chọn số câu cho đề.', 'err');
          alert('Bạn chưa chọn số câu cho đề. Hãy nhập ít nhất 1 câu ở một mức độ.');
          return;
        }

        const examTitle = String(els.examTitle.value || '').trim() || 'Kiểm tra';
        const typedParsed = parseQuestionsByTypeAndCategory(source);
        const parsed = typedParsed.typedMode ? typedParsed : typedParsed.fallback;
        let versions = [];
        let statusText = '';

        if (!typedParsed.typedMode && hasNonSingleRequested(buildConfig)) {
          const message = 'Bạn đã chọn câu ở Mục II/III/IV, vì vậy ngân hàng câu hỏi cần chia theo tiêu đề MỤC I, MỤC II, MỤC III, MỤC IV.';
          setStatus(message, 'err');
          alert(message);
          return;
        }

        if (typedParsed.typedMode) {
          try {
            versions = Array.from({ length: count }, (_, i) => buildVersionFromStructuredPools(typedParsed.pools, buildConfig, i));
          } catch (err) {
            setStatus(err.message, 'err');
            alert(err.message);
            return;
          }
          const typeSummary = QUESTION_TYPE_ORDER.map(([type, label]) => {
            const sum = CATEGORY_ORDER.reduce((acc, [level]) => acc + (((typedParsed.pools[type] || {})[level] || []).length), 0);
            return `${label}: ${sum} câu`;
          }).join(' | ');
          statusText = `Đã sinh ${count} đề theo cấu trúc 4 mục, ${totalRequested} câu in/đề. ${typeSummary}`;
        } else if (parsed.sectionedMode) {
          const missingSections = CATEGORY_ORDER.filter(([key, label]) => configCounts[key] > 0 && !(parsed.pools[key] || []).length).map(([, label]) => label);
          if (missingSections.length) {
            const message = 'Không tìm thấy câu hỏi ở các phần sau: ' + missingSections.join(', ');
            setStatus(message, 'err');
            alert(message);
            return;
          }
          try {
            versions = Array.from({ length: count }, (_, i) => buildVersionFromCategories(parsed.pools, configCounts, i));
          } catch (err) {
            setStatus(err.message, 'err');
            alert(err.message);
            return;
          }
          const poolSummary = CATEGORY_ORDER.map(([key, label]) => `${label}: ${(parsed.pools[key] || []).length} câu`).join(' | ');
          statusText = `Đã sinh ${count} đề theo cấu hình ${totalRequested} câu/đề. ${poolSummary}`;
          if ((parsed.extraPool || []).length) statusText += ` | Ngoài 4 phần có thêm ${parsed.extraPool.length} câu chưa gắn phần.`;
        } else {
          const questions = parseQuestions(source);
          if (!questions.length) {
            const message = 'Phần mềm chưa nhận ra câu hợp lệ. Mỗi câu cần có đủ: Câu n..., A/B/C/D, và đáp án đúng theo 1 trong 3 cách: bôi đỏ chữ cái, gạch chân chữ cái, hoặc dòng Đáp án: A/B/C/D.';
            setStatus(message, 'err');
            alert(message);
            return;
          }
          if (totalRequested > questions.length) {
            const message = `Bạn đang cấu hình ${totalRequested} câu/đề nhưng dữ liệu hiện chỉ có ${questions.length} câu.`;
            setStatus(message, 'err');
            alert(message);
            return;
          }
          versions = Array.from({ length: count }, (_, i) => buildVersion(sampleWithoutReplacement(questions, totalRequested), i));
          statusText = `Đã sinh ${count} đề từ ${questions.length} câu gốc (chế độ thường, chưa chia 4 phần).`;
        }

        state.versions = versions;
        state.lastText = state.includeStudentInfo
          ? renderGeneratedAssignmentsText(buildGeneratedStudentAssignments(), examTitle)
          : renderAllVersionsText(versions, examTitle);
        renderPreview(versions, examTitle, state.includeStudentInfo);
        syncGeneratedDataToExamConfig(examTitle, versions.length, (buildConfig && buildConfig.totalScanItems) || totalRequested, versions);
        try {
          if (typeof window.handleSaveExamConfigRequest === 'function') {
            await window.handleSaveExamConfigRequest({ silent: true });
          }
        } catch (err) {
          const message = err && err.message ? err.message : 'Không thể tự động lưu đề trắc nghiệm.';
          setStatus(message, 'err');
          setSummary(message, 'err');
          alert(message);
          return;
        }
        setStatus(statusText, 'ok');
        setSummary(`Đã sinh ${versions.length} đề và tự động lưu cho ${selectedMons.length} Lớp-Môn đã chọn${state.includeStudentInfo ? ' (có điền tên học sinh, lớp).' : ' (không điền tên học sinh, lớp).'}`, 'ok');
      }

      async function copyResult() {
        if (!state.lastText) {
          alert('Bạn chưa sinh đề.');
          return;
        }
        try {
          await navigator.clipboard.writeText(state.lastText);
          setStatus('Đã copy kết quả vào clipboard.', 'ok');
        } catch (err) {
          setStatus('Không copy được kết quả. ' + err.message, 'err');
        }
      }

      async function downloadText(filename, content, mime) {
        let blob = content instanceof Blob ? content : new Blob([content], { type: mime || 'text/plain;charset=utf-8' });
        try {
          if (typeof window.mvipPrepareWordBlobForDownload === 'function') {
            blob = await window.mvipPrepareWordBlobForDownload(filename, blob, mime);
          }
        } catch (error) {
          console.warn('Không xử lý được màu đáp án trong file Word kiểu cũ, dùng file gốc:', error);
        }
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        document.body.appendChild(a);
        a.click();
        a.remove();
        setTimeout(() => URL.revokeObjectURL(url), 1000);
      }

      function buildMathTypeBatchMacroText() {
        return [
          'Attribute VB_Name = "MvipMathTypeBatch"',
          'Option Explicit',
          '',
          "' MVIP - Chuyen toan bo cong thuc LaTeX nam trong cap dau $...$ bang MathType.",
          "'",
          "' LUU Y QUAN TRONG:",
          "' - Truoc khi chay macro, hay mo/kich hoat tab MathType tren Ribbon cua Word.",
          "' - Neu Word vua mo file hoac vua import macro, nen bam vao tab MathType mot lan roi moi chay macro.",
          "' - Neu macro chi xoa dau $ hoac con sot cong thuc chua convert, hay bam lai tab MathType roi chay lai macro.",
          "' - Macro nay dung lenh MathType Toggle TeX (tuong duong Alt + \\), vi vay MathType phai dang duoc Word nap san.",
          "'",
          "' Cach dung:",
          "' 1. Mo file Word de-trac-nghiem.docx.",
          "' 2. Nhan Alt + F11, vao File > Import File..., chon file MVIP_MathType_Convert_All.bas.",
          "' 3. Quay lai Word, bam vao tab MathType tren thanh Ribbon de kich hoat MathType.",
          "' 4. Nhan Alt + F8, chon MVIP_Convert_All_Dollar_LaTeX_To_MathType, bam Run.",
          "' 5. Macro se lan luot chon tung vung $...$ va goi lenh MathType Toggle TeX.",
          '',
          'Public Sub MVIP_Convert_All_Dollar_LaTeX_To_MathType()',
          '    Dim doc As Document',
          '    Dim openDollar As Range',
          '    Dim closeDollar As Range',
          '    Dim formulaRange As Range',
          '    Dim startPos As Long',
          '    Dim endPos As Long',
          '    Dim formulaStarts() As Long',
          '    Dim formulaEnds() As Long',
          '    Dim formulaCount As Long',
          '    Dim i As Long',
          '    Dim convertedCount As Long',
          '',
          '    Set doc = ActiveDocument',
          '    convertedCount = 0',
          '    formulaCount = 0',
          '    startPos = doc.Content.Start',
          '',
          '    Application.ScreenUpdating = False',
          '',
          '    \' Quet truoc tat ca cac vung $...$ khi tai lieu chua bi MathType thay doi.',
          '    Do',
          '        Set openDollar = doc.Range(startPos, doc.Content.End)',
          '        With openDollar.Find',
          '            .ClearFormatting',
          '            .Text = "$"',
          '            .MatchWildcards = False',
          '            .Forward = True',
          '            .Wrap = wdFindStop',
          '        End With',
          '',
          '        If Not openDollar.Find.Execute Then Exit Do',
          '',
          '        Set closeDollar = doc.Range(openDollar.End, doc.Content.End)',
          '        With closeDollar.Find',
          '            .ClearFormatting',
          '            .Text = "$"',
          '            .MatchWildcards = False',
          '            .Forward = True',
          '            .Wrap = wdFindStop',
          '        End With',
          '',
          '        If Not closeDollar.Find.Execute Then Exit Do',
          '',
          '        startPos = openDollar.Start',
          '        endPos = closeDollar.End',
          '',
          '        If closeDollar.Start <= openDollar.End Then',
          '            startPos = closeDollar.End',
          '        Else',
          '            formulaCount = formulaCount + 1',
          '            ReDim Preserve formulaStarts(1 To formulaCount)',
          '            ReDim Preserve formulaEnds(1 To formulaCount)',
          '            formulaStarts(formulaCount) = startPos',
          '            formulaEnds(formulaCount) = endPos',
          '            startPos = endPos',
          '        End If',
          '    Loop',
          '',
          '    \' Xu ly tu cuoi len dau de khong lam lech vi tri cac cong thuc chua convert.',
          '    For i = formulaCount To 1 Step -1',
          '        Set formulaRange = doc.Range(formulaStarts(i), formulaEnds(i))',
          '        formulaRange.Select',
          '        MVIP_Run_MathType_Convert_Command',
          '        convertedCount = convertedCount + 1',
          '        DoEvents',
          '        MVIP_Wait_Seconds 0.12',
          '    Next i',
          '',
          '    Application.ScreenUpdating = True',
          '    MsgBox "Da xu ly " & convertedCount & " cong thuc LaTeX nam trong dau $...$." & vbCrLf & vbCrLf & "Neu con cong thuc chua duoc convert, hay bam vao tab MathType tren Ribbon roi chay lai macro.", vbInformation',
          'End Sub',
          '',
          'Private Sub MVIP_Run_MathType_Convert_Command()',
          '    On Error Resume Next',
          '    SendKeys "%\\", True',
          '    On Error GoTo 0',
          'End Sub',
          '',
          'Private Sub MVIP_Wait_Seconds(ByVal seconds As Double)',
          '    Dim endTime As Double',
          '    endTime = Timer + seconds',
          '    Do While Timer < endTime',
          '        DoEvents',
          '    Loop',
          'End Sub',
          ''
        ].join('\r\n');
      }

      function downloadMathTypeBatchMacro() {
        downloadText('MVIP_MathType_Convert_All.bas', buildMathTypeBatchMacroText(), 'text/plain;charset=utf-8');
      }

      function saveTxt() {
        if (!state.lastText) {
          alert('Bạn chưa sinh đề.');
          return;
        }
        downloadText('de-trac-nghiem.txt', state.lastText, 'text/plain;charset=utf-8');
        setStatus('Đã tải file TXT.', 'ok');
      }

      async function saveWord() {
        if (!state.versions.length) {
          alert('Bạn chưa sinh đề.');
          return;
        }
        if (!window.docx) {
          alert('Chưa tải được thư viện xuất Word. Hãy kiểm tra Internet rồi thử lại.');
          return;
        }
        const d = window.docx;
        const examTitle = String(els.examTitle.value || '').trim() || 'Kiểm tra';
        const assignments = state.includeStudentInfo ? buildGeneratedStudentAssignments() : [];
        const exportItems = assignments.length
          ? assignments.map((item) => ({ version: item.version, studentName: item.studentName, classLabel: item.classLabel }))
          : state.versions.map((version) => ({ version, studentName: '', classLabel: '' }));
        const children = [];
        const font = 'Times New Roman';
        const paraSpacing = { before: 120, after: 0, line: 240 };
        const paraBase = { spacing: paraSpacing, alignment: d.AlignmentType.LEFT };
        const makeRun = (textValue, extra) => new d.TextRun(Object.assign({ text: textValue, font, size: 24 }, extra || {}));
        const makeRunsFromFormattedText = (textValue, extra) => {
          const source = String(textValue || '');
          const pattern = /<(sub|sup)>([\s\S]*?)<\/\1>/gi;
          const runs = [];
          let lastIndex = 0;
          let match;
          while ((match = pattern.exec(source))) {
            if (match.index > lastIndex) runs.push(makeRun(source.slice(lastIndex, match.index), extra));
            const tag = String(match[1] || '').toLowerCase();
            runs.push(makeRun(match[2] || '', Object.assign({}, extra || {}, tag === 'sub' ? { subScript: true } : { superScript: true })));
            lastIndex = pattern.lastIndex;
          }
          if (lastIndex < source.length) runs.push(makeRun(source.slice(lastIndex), extra));
          return runs.length ? runs : [makeRun('', extra)];
        };
        const makePara = (childrenOrText, extra) => {
          const options = Object.assign({}, paraBase, extra || {});
          if (Array.isArray(childrenOrText)) options.children = childrenOrText;
          else if (typeof childrenOrText === 'string' && childrenOrText) options.children = makeRunsFromFormattedText(childrenOrText);
          return new d.Paragraph(options);
        };
        const makeTable = (rows) => new d.Table({
          width: { size: 100, type: d.WidthType.PERCENTAGE },
          rows: (Array.isArray(rows) ? rows : []).map((row) => new d.TableRow({
            children: (Array.isArray(row) ? row : []).map((cell) => new d.TableCell({ children: [makePara(String(cell || ''))] })),
          })),
        });

        const makeBorderlessOptionTable = (rowOptions, mode) => {
          const rowsData = mode === 'row4'
            ? [rowOptions]
            : [rowOptions.slice(0, 2), rowOptions.slice(2, 4)];
          const colCount = mode === 'row4' ? 4 : 2;
          const colWidth = Math.floor(100 / colCount);
          return new d.Table({
            width: { size: 100, type: d.WidthType.PERCENTAGE },
            borders: {
              top: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
              bottom: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
              left: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
              right: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
              insideHorizontal: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
              insideVertical: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
            },
            rows: rowsData.map((row) => new d.TableRow({
              children: row.map((opt) => new d.TableCell({
                width: { size: colWidth, type: d.WidthType.PERCENTAGE },
                margins: { top: 40, bottom: 40, left: 0, right: 120 },
                borders: {
                  top: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
                  bottom: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
                  left: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
                  right: { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' },
                },
                children: [makePara([makeRun(`${opt.new_letter}.`, { bold: true }), makeRun(' '), ...makeRunsFromFormattedText(normalizeInlineText(opt.text || ''))])],
              })),
            })),
          });
        };

        const makeTabbedOptionParagraph = (items, tabPositions) => {
          const runs = [];
          (Array.isArray(items) ? items : []).forEach((item, index) => {
            if (index > 0) runs.push(makeRun('\t'));
            runs.push(makeRun(`${item.new_letter}.`, { bold: true }));
            runs.push(makeRun(' '));
            runs.push(...makeRunsFromFormattedText(normalizeInlineText(item.text || '')));
          });
          return makePara(runs, {
            tabStops: (Array.isArray(tabPositions) ? tabPositions : []).map((position) => ({
              type: d.TabStopType.LEFT,
              position,
            })),
          });
        };

        const makeWordOptionRuns = (opt) => [
          makeRun(`${opt.new_letter}.`, { bold: true }),
          makeRun(' '),
          ...makeRunsFromFormattedText(normalizeInlineText(opt.text || '')),
        ];

        const appendWordOptionLines = (options, mode) => {
          const rowOptions = Array.isArray(options) ? options : [];
          if (mode === 'row4') {
            const runs = [];
            rowOptions.forEach((opt, index) => {
              if (index > 0) runs.push(makeRun('\u00A0'.repeat(10)));
              runs.push(...makeWordOptionRuns(opt));
            });
            children.push(makePara(runs));
            return;
          }
          if (mode === 'grid2') {
            const tabStops = [{ type: d.TabStopType.LEFT, position: TWIP_CM * 8.2 }];
            children.push(makePara([...makeWordOptionRuns(rowOptions[0] || {}), makeRun('\t'), ...makeWordOptionRuns(rowOptions[1] || {})], { tabStops }));
            children.push(makePara([...makeWordOptionRuns(rowOptions[2] || {}), makeRun('\t'), ...makeWordOptionRuns(rowOptions[3] || {})], { tabStops }));
            return;
          }
          rowOptions.forEach((opt) => {
            children.push(makePara(makeWordOptionRuns(opt)));
          });
        };

        async function appendRichWordContent(textValue, prefixRuns) {
          const blocks = extractRichBlocks(textValue || '');
          const firstTextIndex = blocks.findIndex((block) => block && block.type === 'text' && String(block.text || '').trim());
          let usedFirst = false;
          if (firstTextIndex === -1 && Array.isArray(prefixRuns) && prefixRuns.length) children.push(makePara(prefixRuns));
          for (let blockIndex = 0; blockIndex < blocks.length; blockIndex += 1) {
            const block = blocks[blockIndex];
            if (!block) continue;
            if (block.type === 'text') {
              const lines = String(block.text || '').split(/\n+/).filter((line) => line.trim());
              lines.forEach((line, lineIndex) => {
                if (!usedFirst && blockIndex === firstTextIndex && lineIndex === 0 && Array.isArray(prefixRuns) && prefixRuns.length) {
                  children.push(makePara([...prefixRuns, ...makeRunsFromFormattedText(line)]));
                  usedFirst = true;
                } else {
                  children.push(makePara(line));
                }
              });
            } else if (block.type === 'image' && block.src) {
              const dims = await getImageDimensionsFromDataUrl(block.src);
              const fitted = fitImageSize(dims.width, dims.height, 420, 260);
              children.push(new d.Paragraph({ spacing: paraSpacing, children: [new d.ImageRun({ data: dataUrlToUint8Array(block.src), transformation: fitted })] }));
            } else if (block.type === 'table' && block.rows && block.rows.length) {
              children.push(makeTable(block.rows));
            }
          }
        }

        for (let itemIndex = 0; itemIndex < exportItems.length; itemIndex += 1) {
          const item = exportItems[itemIndex];
          const version = item.version;
          if (itemIndex > 0) children.push(new d.Paragraph({ children: [new d.PageBreak()] }));
          children.push(makePara([makeRun(`MÃ ĐỀ ${version.code}`, { bold: true })], { alignment: d.AlignmentType.CENTER }));
          children.push(makePara(examTitle, { alignment: d.AlignmentType.CENTER }));
          children.push(makePara([makeRun('Họ và tên: '), makeRun(String(item.studentName || '').trim() || '...............................................................')]));
          children.push(makePara([makeRun('Lớp: '), makeRun(String(item.classLabel || '').trim() || '...............')]));
          children.push(makePara([makeRun('Khoanh tròn vào chữ cái đứng trước câu trả lời đúng', { italics: true })]));
          for (const question of version.questions) {
            if (question.section_label) children.push(makePara([makeRun(String(question.section_label || '').toUpperCase(), { bold: true })]));
            await appendRichWordContent(question.prompt || '', [makeRun(`Câu ${question.display_number}. `, { bold: true })]);
            const optionLayout = buildOptionLayout(question.options, WORD_OPTION_WRAP_WIDTH);
            if (optionLayout.mode === 'row4' || optionLayout.mode === 'grid2') {
              appendWordOptionLines(question.options, optionLayout.mode);
            } else {
              for (const opt of question.options) await appendRichWordContent(opt.text || '', [makeRun(`${opt.new_letter}.`, { bold: true }), makeRun(' ')]);
            }
          }
        }

        children.push(new d.Paragraph({ children: [new d.PageBreak()] }));
        children.push(makePara([makeRun('ĐÁP ÁN', { bold: true })]));
        state.versions.forEach((version) => children.push(makePara(`${version.code}: ${version.answer_key}`)));

        const doc = new d.Document({
          creator: 'OpenAI',
          styles: { default: { document: { run: { font, size: 24 }, paragraph: { spacing: paraSpacing } } } },
          sections: [{ properties: { page: { margin: { top: TWIP_CM * 2, right: TWIP_CM * 2, bottom: TWIP_CM * 2, left: TWIP_CM * 2 }, size: { width: 11906, height: 16838 } } }, children }],
        });

        try {
          const blob = await d.Packer.toBlob(doc);
          downloadText('de-trac-nghiem.docx', blob, 'application/vnd.openxmlformats-officedocument.wordprocessingml.document');
          const shouldExportMacro = !!(els.exportMacroCheckbox && els.exportMacroCheckbox.checked);
          if (shouldExportMacro) setTimeout(downloadMathTypeBatchMacro, 600);
          const baseMessage = assignments.length
            ? `Đã xuất file Word theo từng học sinh (${assignments.length} học sinh).`
            : 'Đã xuất file Word.';
          setStatus(shouldExportMacro ? `${baseMessage} File macro MathType cũng đã được tải kèm để convert hàng loạt công thức $...$.` : baseMessage, 'ok');
        } catch (err) {
          setStatus('Xuất Word lỗi: ' + err.message, 'err');
          alert('Xuất Word lỗi: ' + err.message);
        }
      }

      function openWordPicker() {
        if (!els.fileInput) return;
        try {
          els.fileInput.value = '';
        } catch (err) {}
        if (typeof els.fileInput.showPicker === 'function') {
          try {
            els.fileInput.showPicker();
            return;
          } catch (err) {}
        }
        els.fileInput.click();
      }

      function renderPresetQuestionBanks() {
        if (!els.presetBankSelect) return;
        const options = ['<option value="">-- Chọn bộ câu hỏi --</option>'];
        MVIP_PRESET_QUESTION_BANKS.forEach((item, index) => {
          const title = String(item && item.title || `Bộ câu hỏi ${index + 1}`).trim();
          const url = String(item && item.url || '').trim();
          if (!url) return;
          options.push(`<option value="${index}">${escapeHtml(title)}</option>`);
        });
        els.presetBankSelect.innerHTML = options.join('');
        if (els.loadPresetBankBtn) {
          const hasBanks = MVIP_PRESET_QUESTION_BANKS.some((item) => item && item.url);
          els.loadPresetBankBtn.disabled = !hasBanks;
        }
      }

      async function loadWordArrayBuffer(arrayBuffer, displayName) {
        if (!arrayBuffer) return '';
        let content = '';
        const name = String(displayName || 'file Word');
        const isDocxFile = /\.docx(?:$|\?)/i.test(name);

        if (isDocxFile) {
          try {
            content = await convertDocxArrayBufferToQuestionText(arrayBuffer);
          } catch (docxErr) {
            content = '';
          }
        }

        if (!content) {
          try {
            const htmlResult = await window.mammoth.convertToHtml({ arrayBuffer }, { convertImage: window.mammoth.images.inline() });
            content = convertWordHtmlToQuestionText(htmlResult.value || '');
          } catch (htmlErr) {
            content = '';
          }
        }

        if (!content) {
          const rawResult = await window.mammoth.extractRawText({ arrayBuffer });
          content = String(rawResult.value || '').replace(/\r/g, '').trim();
        }

        if (content && typeof window.cv7991NormalizeLegacyWordSymbolText === 'function') {
          content = window.cv7991NormalizeLegacyWordSymbolText(content);
        }
        if (!content) throw new Error(`${name} không có nội dung để nhập vào ô dữ liệu.`);
        els.input.value = content;
        return content;
      }

      async function loadPresetQuestionBank() {
        if (!els.presetBankSelect) return;
        if (!window.mammoth) {
          alert('Chưa tải được thư viện đọc Word. Hãy kiểm tra Internet rồi thử lại.');
          return;
        }
        const index = parseInt(String(els.presetBankSelect.value || ''), 10);
        const item = Number.isInteger(index) ? MVIP_PRESET_QUESTION_BANKS[index] : null;
        if (!item || !item.url) {
          alert('Bạn chưa chọn bộ câu hỏi có sẵn của Mvip.');
          return;
        }
        const title = String(item.title || 'Bộ câu hỏi Mvip').trim();
        const url = String(item.url || '').trim();
        try {
          setStatus(`Đang nạp bộ câu hỏi: ${title}...`, '');
          const response = await fetch(url, { cache: 'no-store' });
          if (!response.ok) throw new Error(`Không tải được file (${response.status}).`);
          const arrayBuffer = await response.arrayBuffer();
          await loadWordArrayBuffer(arrayBuffer, url);
          setStatus(`Đã nạp bộ câu hỏi có sẵn của Mvip: ${title}.`, 'ok');
        } catch (err) {
          const message = `Không nạp được bộ câu hỏi "${title}". Bạn kiểm tra lại đường dẫn file Word đã upload. ${err.message || err}`;
          setStatus(message, 'err');
          alert(message);
        }
      }

      function isDocxColorRed(value) {
        const normalized = String(value || '').trim().toLowerCase().replace(/^#/, '');
        return ['ff0000', 'f00', 'ee0000', 'c00000', 'red'].includes(normalized);
      }

      function isDocxColorGreen(value) {
        let normalized = String(value || '').trim().toLowerCase().replace(/^#/, '');
        if (['green', 'lime', 'darkgreen'].includes(normalized)) return true;
        if (/^[0-9a-f]{8}$/i.test(normalized)) normalized = normalized.slice(-6);
        if (/^[0-9a-f]{3}$/i.test(normalized)) normalized = normalized.split('').map((ch) => ch + ch).join('');
        if (['92d050', '00b050', '00b0f0', '0070c0'].includes(normalized)) return true;
        if (!/^[0-9a-f]{6}$/i.test(normalized)) return false;
        return isGreenRgb(
          parseInt(normalized.slice(0, 2), 16),
          parseInt(normalized.slice(2, 4), 16),
          parseInt(normalized.slice(4, 6), 16)
        );
      }

      function getDocxAttrValue(node, localName) {
        if (!node || !node.attributes) return '';
        const direct = node.getAttribute(localName);
        if (direct) return direct;
        const namespaced = node.getAttribute(`w:${localName}`);
        if (namespaced) return namespaced;
        const attr = Array.from(node.attributes).find((item) => {
          const name = String(item && item.name || '');
          return name === localName || name.endsWith(`:${localName}`);
        });
        return attr ? attr.value : '';
      }

      function collectDocxSegments(node, inherited, output) {
        if (!node || node.nodeType !== Node.ELEMENT_NODE) return;
        const localName = String(node.localName || '').toLowerCase();

        if (localName === 'r') {
          let red = !!inherited.red;
          let green = !!inherited.green;
          let underline = !!inherited.underline;
          let verticalAlign = String(inherited.verticalAlign || '');
          let legacyPosition = NaN;
          let legacySize = NaN;
          const rPr = Array.from(node.childNodes || []).find((child) => child && child.nodeType === Node.ELEMENT_NODE && String(child.localName || '').toLowerCase() === 'rpr');
          if (rPr) {
            Array.from(rPr.childNodes || []).forEach((child) => {
              if (!child || child.nodeType !== Node.ELEMENT_NODE) return;
              const childName = String(child.localName || '').toLowerCase();
              if (childName === 'color') {
                const colorVal = getDocxAttrValue(child, 'val');
                if (isDocxColorRed(colorVal)) red = true;
                if (isDocxColorGreen(colorVal)) green = true;
              } else if (childName === 'highlight') {
                const highlightVal = String(getDocxAttrValue(child, 'val') || '').trim().toLowerCase();
                if (highlightVal === 'red') red = true;
                if (['green', 'brightgreen', 'darkgreen'].includes(highlightVal.replace(/[^a-z]/g, ''))) green = true;
              } else if (childName === 'u') {
                const underlineVal = getDocxAttrValue(child, 'val');
                if (!underlineVal || String(underlineVal).toLowerCase() !== 'none') underline = true;
              } else if (childName === 'vertalign') {
                const alignVal = String(getDocxAttrValue(child, 'val') || '').toLowerCase();
                if (alignVal === 'subscript' || alignVal === 'superscript') verticalAlign = alignVal;
              } else if (childName === 'position') {
                const value = Number(getDocxAttrValue(child, 'val'));
                if (Number.isFinite(value)) legacyPosition = value;
              } else if (childName === 'sz' || childName === 'szcs') {
                const value = Number(getDocxAttrValue(child, 'val'));
                if (Number.isFinite(value) && !(legacySize > 0)) legacySize = value;
              }
            });
          }

          if (!verticalAlign && Number.isFinite(legacyPosition) && legacyPosition !== 0
            && Number.isFinite(legacySize) && legacySize > 0 && legacySize <= 20) {
            const runText = Array.from(node.getElementsByTagNameNS('http://schemas.openxmlformats.org/wordprocessingml/2006/main', 't') || [])
              .map((item) => String(item.textContent || ''))
              .join('')
              .trim();
            if (runText && /^[A-Za-z0-9()+\-=.,]+$/.test(runText)) {
              verticalAlign = legacyPosition < 0 ? 'subscript' : 'superscript';
            }
          }

          Array.from(node.childNodes || []).forEach((child) => {
            if (!child || child.nodeType !== Node.ELEMENT_NODE) return;
            const childName = String(child.localName || '').toLowerCase();
            if (childName === 't') {
              output.push({ text: String(child.textContent || ''), red, green, underline, verticalAlign });
            } else if (childName === 'tab') {
              output.push({ text: '\t', red, green, underline, verticalAlign });
            } else if (childName === 'br' || childName === 'cr') {
              output.push({ text: '\n', red, green, underline, verticalAlign });
            }
          });
          return;
        }

        Array.from(node.childNodes || []).forEach((child) => {
          if (!child) return;
          if (child.nodeType === Node.TEXT_NODE) return;
          collectDocxSegments(child, inherited, output);
        });
      }

      function extractDocxParagraphInfo(paragraph) {
        const segments = [];
        collectDocxSegments(paragraph, { red: false, green: false, underline: false }, segments);
        const joinedText = segments.map((seg) => formatSegmentText(seg)).join('');
        const normalizedText = (typeof window.cv7991NormalizeLegacyWordSymbolText === 'function')
          ? window.cv7991NormalizeLegacyWordSymbolText(joinedText)
          : joinedText;
        const text = normalizedText
          .replace(/\u00a0/g, ' ')
          .replace(/\n{3,}/g, '\n\n')
          .replace(/[ \t]+\n/g, '\n')
          .replace(/\n[ \t]+/g, '\n')
          .trim();
        return {
          text,
          markedLetter: getMarkedLetterFromSegments(segments),
        };
      }

      function getDocxMediaMime(target) {
        const normalized = String(target || '').split('?')[0].toLowerCase();
        if (normalized.endsWith('.png')) return 'image/png';
        if (normalized.endsWith('.jpg') || normalized.endsWith('.jpeg')) return 'image/jpeg';
        if (normalized.endsWith('.gif')) return 'image/gif';
        if (normalized.endsWith('.webp')) return 'image/webp';
        if (normalized.endsWith('.bmp')) return 'image/bmp';
        return 'image/png';
      }

      async function buildDocxMediaMap(zip) {
        const relsEntry = zip.file('word/_rels/document.xml.rels');
        if (!relsEntry) return {};
        const relsXml = await relsEntry.async('string');
        const parser = new DOMParser();
        const relsDoc = parser.parseFromString(relsXml, 'application/xml');
        if (relsDoc.getElementsByTagName('parsererror').length) return {};
        const relNodes = Array.from(relsDoc.getElementsByTagNameNS('http://schemas.openxmlformats.org/package/2006/relationships', 'Relationship'));
        const mediaMap = {};
        for (const rel of relNodes) {
          const relId = rel.getAttribute('Id');
          const target = rel.getAttribute('Target');
          if (!relId || !target || !/media\//i.test(target)) continue;
          const normalized = target.replace(/^\/+/, '').replace(/^\.\.\//, '');
          const entryPath = normalized.startsWith('word/') ? normalized : `word/${normalized}`;
          const fileEntry = zip.file(entryPath);
          if (!fileEntry) continue;
          const base64 = await fileEntry.async('base64');
          mediaMap[relId] = `data:${getDocxMediaMime(entryPath)};base64,${base64}`;
        }
        return mediaMap;
      }

      function collectDocxImageRelationIds(node, output) {
        if (!node || node.nodeType !== Node.ELEMENT_NODE) return;
        const localName = String(node.localName || '').toLowerCase();
        if (localName === 'blip') {
          const embed = getDocxAttrValue(node, 'embed') || getDocxAttrValue(node, 'link');
          if (embed) output.push(embed);
        } else if (localName === 'imagedata') {
          const relId = getDocxAttrValue(node, 'id');
          if (relId) output.push(relId);
        }
        Array.from(node.childNodes || []).forEach((child) => collectDocxImageRelationIds(child, output));
      }

      function extractDocxImageMarkers(node, mediaMap) {
        const relIds = [];
        collectDocxImageRelationIds(node, relIds);
        return Array.from(new Set(relIds)).map((relId) => makeImageMarker(mediaMap[relId] || '')).filter(Boolean);
      }

      function extractDocxTableRows(tableNode) {
        const rowNodes = Array.from(tableNode.getElementsByTagNameNS('http://schemas.openxmlformats.org/wordprocessingml/2006/main', 'tr'));
        return rowNodes.map((rowNode) => {
          const cellNodes = Array.from(rowNode.getElementsByTagNameNS('http://schemas.openxmlformats.org/wordprocessingml/2006/main', 'tc'));
          return cellNodes.map((cellNode) => {
            const info = extractDocxParagraphInfo(cellNode);
            return String(info.text || '').replace(/\n+/g, ' ').trim();
          });
        }).filter((row) => row.some((cell) => String(cell || '').trim()));
      }

      function isQuestionSectionHeader(line) {
        const normalized = String(line || '').trim();
        return /^(PHẦN|PHAN)\s*(\d+|[IVXLCDM]+)\b/i.test(normalized);
      }

      async function convertDocxArrayBufferToQuestionText(arrayBuffer) {
        if (!window.JSZip) return '';
        const zip = await window.JSZip.loadAsync(arrayBuffer);
        const docEntry = zip.file('word/document.xml');
        if (!docEntry) return '';
        const xml = await docEntry.async('string');
        const parser = new DOMParser();
        const doc = parser.parseFromString(xml, 'application/xml');
        if (doc.getElementsByTagName('parsererror').length) return '';
        const mediaMap = await buildDocxMediaMap(zip);
        const body = doc.getElementsByTagNameNS('http://schemas.openxmlformats.org/wordprocessingml/2006/main', 'body')[0];
        if (!body) return '';

        const lineInfos = [];
        Array.from(body.childNodes || []).forEach((child) => {
          if (!child || child.nodeType !== Node.ELEMENT_NODE) return;
          const localName = String(child.localName || '').toLowerCase();
          if (localName === 'p') {
            const info = extractDocxParagraphInfo(child);
            if (info.text) lineInfos.push(info);
            extractDocxImageMarkers(child, mediaMap).forEach((marker) => lineInfos.push({ text: marker, markedLetter: '' }));
          } else if (localName === 'tbl') {
            const marker = makeTableMarker(extractDocxTableRows(child));
            if (marker) lineInfos.push({ text: marker, markedLetter: '' });
          }
        });
        if (!lineInfos.length) return '';

        const output = [];
        let hasActiveQuestion = false;
        let pendingMarkedLetter = '';
        let hasExplicitAnswer = false;

        function flushPendingAnswer() {
          if (!hasActiveQuestion) return;
          if (!hasExplicitAnswer && pendingMarkedLetter) output.push(`Đáp án: ${pendingMarkedLetter}`);
          pendingMarkedLetter = '';
          hasExplicitAnswer = false;
          hasActiveQuestion = false;
        }

        lineInfos.forEach((info) => {
          const rawText = String(info.text || '');
          const line = rawText.trim();
          if (!line) return;
          if (/^(Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i.test(line)) {
            if (output.length) {
              flushPendingAnswer();
              if (output[output.length - 1] !== '') output.push('');
            }
            hasActiveQuestion = true;
            pendingMarkedLetter = '';
            hasExplicitAnswer = false;
            output.push(line);
            return;
          }
          const explicitMatch = line.match(/^Đáp án\s*:\s*([ABCD])\s*$/i);
          if (explicitMatch) {
            pendingMarkedLetter = normalizeLetter(explicitMatch[1]);
            hasExplicitAnswer = true;
            output.push(`Đáp án: ${pendingMarkedLetter}`);
            return;
          }
          if (isQuestionSectionHeader(line)) {
            flushPendingAnswer();
            if (output.length && output[output.length - 1] !== '') output.push('');
            output.push(line);
            return;
          }
          const optionMatch = line.match(/^([ABCD])\.\s*/i);
          if (optionMatch && info.markedLetter) pendingMarkedLetter = normalizeLetter(info.markedLetter || optionMatch[1]);
          output.push(rawText);
        });

        flushPendingAnswer();
        return output.join('\n').replace(/\n{3,}/g, '\n\n').trim();
      }

      async function loadWordFile(file) {
        if (!file) return;
        if (!window.mammoth) {
          alert('Chưa tải được thư viện đọc Word. Hãy kiểm tra Internet rồi thử lại.');
          return;
        }
        try {
          const arrayBuffer = await file.arrayBuffer();
          await loadWordArrayBuffer(arrayBuffer, file.name || 'file Word');
          setStatus(`Đã nạp nội dung từ file Word: ${file.name}. Hỗ trợ đáp án đúng theo 3 cách, đồng thời giữ được ảnh và bảng biểu của câu hỏi.`, 'ok');
        } catch (err) {
          setStatus('Không đọc được file Word: ' + err.message, 'err');
          alert('Không đọc được file Word: ' + err.message);
        } finally {
          els.fileInput.value = '';
        }
      }

      function syncGeneratedDataToExamConfig(examTitle, versionCount, totalQuestionCount, versions) {
        const configNameInput = document.getElementById('examConfigNameInput');
        const codeCountInput = document.getElementById('examCodeCountInput');
        const questionCountInput = document.getElementById('examQuestionCountInput');
        const answerKeysEditor = document.getElementById('examAnswerKeysEditor');
        if (configNameInput) configNameInput.value = String(examTitle || '').trim();
        if (codeCountInput) codeCountInput.value = versionCount > 0 ? String(versionCount) : '';
        if (questionCountInput) questionCountInput.value = totalQuestionCount > 0 ? String(totalQuestionCount) : '';
        if (answerKeysEditor) {
          const lines = Array.isArray(versions)
            ? versions.map((version) => `${version.code}: ${version.answer_key}`)
            : [];
          answerKeysEditor.value = lines.join('\n');
        }
      }

      function clearOutput() {
        state.versions = [];
        state.lastText = '';
        renderPreview([], els.examTitle.value || '', state.includeStudentInfo);
        setStatus('Đã xóa kết quả.', 'ok');
        setSummary('Chưa có đề nào được sinh.');
      }

      function isStyleRed(styleText) {
        const style = String(styleText || '').toLowerCase();
        return /color\s*:\s*(red|#f00\b|#ff0000\b|rgb\s*\(\s*255\s*,\s*0\s*,\s*0\s*\))/i.test(style);
      }

      function isGreenRgb(r, g, b) {
        const red = Math.round(Number(r) || 0);
        const green = Math.round(Number(g) || 0);
        const blue = Math.round(Number(b) || 0);
        const exactCorrectColors = new Set([
          '146,208,80',  // #92D050
          '0,176,80',    // #00B050
          '0,176,240',   // #00B0F0
          '0,112,192'    // #0070C0
        ]);
        if (exactCorrectColors.has(`${red},${green},${blue}`)) return true;
        return green >= 90 && green >= red + 20 && green >= blue + 15;
      }

      function isStyleGreen(styleText) {
        const style = String(styleText || '').toLowerCase();
        const colorMatch = style.match(/(?:^|;)\s*color\s*:\s*([^;]+)/i);
        const value = String(colorMatch && colorMatch[1] || '').trim().toLowerCase();
        if (!value) return false;
        if (/^(?:green|lime|darkgreen|forestgreen|seagreen)$/i.test(value)) return true;
        const shortHex = value.match(/^#([0-9a-f]{3})$/i);
        if (shortHex) {
          const hex = shortHex[1];
          return isGreenRgb(parseInt(hex[0] + hex[0], 16), parseInt(hex[1] + hex[1], 16), parseInt(hex[2] + hex[2], 16));
        }
        const longHex = value.match(/^#([0-9a-f]{6})$/i);
        if (longHex) {
          const hex = longHex[1];
          return isGreenRgb(parseInt(hex.slice(0, 2), 16), parseInt(hex.slice(2, 4), 16), parseInt(hex.slice(4, 6), 16));
        }
        const rgb = value.match(/^rgba?\s*\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)/i);
        return !!rgb && isGreenRgb(Number(rgb[1]), Number(rgb[2]), Number(rgb[3]));
      }

      function isStyleUnderline(styleText) {
        const style = String(styleText || '').toLowerCase();
        return /text-decoration(?:-line)?\s*:\s*[^;]*underline|text-decoration-line\s*:\s*underline/i.test(style);
      }

      function collectStyledSegments(node, inherited, output) {
        if (!node) return;
        if (node.nodeType === Node.TEXT_NODE) {
          const value = String(node.nodeValue || '');
          if (value) output.push({ text: value, red: !!inherited.red, green: !!inherited.green, underline: !!inherited.underline, verticalAlign: inherited.verticalAlign || '' });
          return;
        }
        if (node.nodeType !== Node.ELEMENT_NODE) return;

        const tag = String(node.tagName || '').toLowerCase();
        if (tag === 'br') {
          output.push({ text: '\n', red: !!inherited.red, green: !!inherited.green, underline: !!inherited.underline });
          return;
        }

        const style = node.getAttribute ? String(node.getAttribute('style') || '') : '';
        const verticalStyle = /vertical-align\s*:\s*(sub|super|subscript|superscript)/i.exec(style);
        const tagVerticalAlign = tag === 'sub' ? 'subscript' : (tag === 'sup' ? 'superscript' : '');
        const styleVerticalAlign = verticalStyle
          ? (/sup/i.test(verticalStyle[1]) ? 'superscript' : 'subscript')
          : '';
        const next = {
          red: !!inherited.red || isStyleRed(style),
          green: !!inherited.green || isStyleGreen(style),
          underline: !!inherited.underline || tag === 'u' || isStyleUnderline(style),
          verticalAlign: tagVerticalAlign || styleVerticalAlign || inherited.verticalAlign || '',
        };
        Array.from(node.childNodes || []).forEach((child) => collectStyledSegments(child, next, output));
      }

      function getMarkedLetterFromSegments(segments) {
        const rawText = segments.map((seg) => seg.text).join('').replace(/\u00a0/g, ' ');
        const normalizedText = rawText.replace(/\s+/g, ' ').trim();
        const match = normalizedText.match(/^([ABCD])\.\s*/i);
        if (!match) return '';

        const prefixSegments = [];
        let visiblePrefix = '';
        for (const seg of segments) {
          prefixSegments.push(seg);
          visiblePrefix += seg.text.replace(/\u00a0/g, ' ');
          if (visiblePrefix.replace(/\s+/g, ' ').trim().length >= 6) break;
        }

        const hasMarkedPrefix = prefixSegments.some((seg) => (seg.red || seg.green || seg.underline) && String(seg.text || '').trim());
        return hasMarkedPrefix ? normalizeLetter(match[1]) : '';
      }

      function extractStyledLineInfo(element) {
        const segments = [];
        collectStyledSegments(element, { red: false, green: false, underline: false }, segments);
        const text = segments.map((seg) => formatSegmentText(seg)).join('')
          .replace(/\u00a0/g, ' ')
          .replace(/\n{3,}/g, '\n\n')
          .replace(/[ \t]+\n/g, '\n')
          .replace(/\n[ \t]+/g, '\n')
          .trim();
        return {
          text,
          markedLetter: getMarkedLetterFromSegments(segments),
        };
      }

      function convertHtmlTableToRows(tableNode) {
        const rowNodes = Array.from(tableNode.querySelectorAll('tr'));
        return rowNodes.map((rowNode) => Array.from(rowNode.querySelectorAll('th,td')).map((cellNode) => String(cellNode.textContent || '').replace(/\u00a0/g, ' ').replace(/\s+/g, ' ').trim())).filter((row) => row.some((cell) => cell));
      }

      function convertHtmlNodeToLineInfos(node, output) {
        if (!node || node.nodeType !== Node.ELEMENT_NODE) return;
        const tag = String(node.tagName || '').toLowerCase();
        if (tag === 'table') {
          const marker = makeTableMarker(convertHtmlTableToRows(node));
          if (marker) output.push({ text: marker, markedLetter: '' });
          return;
        }
        if (tag === 'img') {
          const marker = makeImageMarker(String(node.getAttribute('src') || '').trim());
          if (marker) output.push({ text: marker, markedLetter: '' });
          return;
        }
        if (tag === 'p' || tag === 'li') {
          const info = extractStyledLineInfo(node);
          if (info.text) output.push(info);
          Array.from(node.querySelectorAll('img')).forEach((img) => {
            const marker = makeImageMarker(String(img.getAttribute('src') || '').trim());
            if (marker) output.push({ text: marker, markedLetter: '' });
          });
          return;
        }
        Array.from(node.children || []).forEach((child) => convertHtmlNodeToLineInfos(child, output));
      }

      function convertWordHtmlToQuestionText(html) {
        const container = document.createElement('div');
        container.innerHTML = String(html || '');
        const lineInfos = [];
        Array.from(container.children || []).forEach((node) => convertHtmlNodeToLineInfos(node, lineInfos));
        if (!lineInfos.length) return String(container.textContent || '').replace(/\r/g, '').trim();

        const output = [];
        let hasActiveQuestion = false;
        let pendingMarkedLetter = '';
        let hasExplicitAnswer = false;

        function flushPendingAnswer() {
          if (!hasActiveQuestion) return;
          if (!hasExplicitAnswer && pendingMarkedLetter) output.push(`Đáp án: ${pendingMarkedLetter}`);
          pendingMarkedLetter = '';
          hasExplicitAnswer = false;
          hasActiveQuestion = false;
        }

        lineInfos.forEach((info) => {
          const rawText = String(info.text || '');
          const line = rawText.trim();
          if (!line) return;
          if (/^(Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VDC|VD|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i.test(line)) {
            if (output.length) {
              flushPendingAnswer();
              if (output[output.length - 1] !== '') output.push('');
            }
            hasActiveQuestion = true;
            pendingMarkedLetter = '';
            hasExplicitAnswer = false;
            output.push(line);
            return;
          }
          const explicitMatch = line.match(/^Đáp án\s*:\s*([ABCD])\s*$/i);
          if (explicitMatch) {
            pendingMarkedLetter = normalizeLetter(explicitMatch[1]);
            hasExplicitAnswer = true;
            output.push(`Đáp án: ${pendingMarkedLetter}`);
            return;
          }
          if (isQuestionSectionHeader(line)) {
            flushPendingAnswer();
            if (output.length && output[output.length - 1] !== '') output.push('');
            output.push(line);
            return;
          }
          const optionMatch = line.match(/^([ABCD])\.\s*/i);
          if (optionMatch && info.markedLetter) pendingMarkedLetter = normalizeLetter(info.markedLetter || optionMatch[1]);
          output.push(rawText);
        });

        flushPendingAnswer();
        return output.join('\n').replace(/\n{3,}/g, '\n\n').trim();
      }

      function toggleSection(button, body) {
        if (!button || !body) return;
        const expanded = button.getAttribute('aria-expanded') !== 'false';
        const nextExpanded = !expanded;
        button.setAttribute('aria-expanded', nextExpanded ? 'true' : 'false');
        button.textContent = nextExpanded ? '▼' : '▶';
        body.hidden = !nextExpanded;
      }

      function bindEvents() {
        if (!els.root) return;
        renderPresetQuestionBanks();
        if (els.generateWithNamesBtn) els.generateWithNamesBtn.addEventListener('click', () => handleGenerate(true));
        if (els.copyBtn) els.copyBtn.addEventListener('click', copyResult);
        if (els.saveTxtBtn) els.saveTxtBtn.addEventListener('click', saveTxt);
        if (els.saveWordBtn) els.saveWordBtn.addEventListener('click', saveWord);
        if (els.clearBtn) els.clearBtn.addEventListener('click', clearOutput);
        if (els.loadWordBtn && els.fileInput) els.loadWordBtn.addEventListener('click', openWordPicker);
        if (els.loadPresetBankBtn) els.loadPresetBankBtn.addEventListener('click', loadPresetQuestionBank);
        if (els.fileInput) els.fileInput.addEventListener('change', (event) => loadWordFile(event.target.files && event.target.files[0]));
        if (els.inputToggleBtn && els.inputSectionBody) els.inputToggleBtn.addEventListener('click', () => toggleSection(els.inputToggleBtn, els.inputSectionBody));
      }


      // Public core used by the standalone "Trộn đề" feature. It intentionally
      // does not depend on login state or the hidden qgen UI.
      window.mvipQuestionMixerCore = {
        async readWordArrayBuffer(arrayBuffer, displayName) {
          if (!arrayBuffer) throw new Error('File Word không có dữ liệu.');
          const name = String(displayName || 'file Word');
          let content = '';
          if (/\.(?:docx|docm)(?:$|\?)/i.test(name)) {
            try { content = await convertDocxArrayBufferToQuestionText(arrayBuffer); } catch (_) { content = ''; }
          }
          if (!content && window.mammoth) {
            try {
              const htmlResult = await window.mammoth.convertToHtml({ arrayBuffer }, { convertImage: window.mammoth.images.inline() });
              content = convertWordHtmlToQuestionText(htmlResult.value || '');
            } catch (_) { content = ''; }
          }
          if (!content && window.mammoth) {
            try {
              const rawResult = await window.mammoth.extractRawText({ arrayBuffer });
              content = String(rawResult.value || '').replace(/\r/g, '').trim();
            } catch (_) { content = ''; }
          }
          if (content && typeof window.cv7991NormalizeLegacyWordSymbolText === 'function') {
            content = window.cv7991NormalizeLegacyWordSymbolText(content);
          }
          if (!content) throw new Error(`${name} không có nội dung mà MVIP đọc được.`);
          return content;
        },
        extractRichBlocks,
        normalizeInlineText,
        dataUrlToUint8Array,
        getImageDimensionsFromDataUrl,
        fitImageSize,
      };

      bindEvents();
    })();
</script>

<script id="mvipAutomaticLogoLoader">
  (() => {
    'use strict';

    const LIST_URL = '/logo-list/';
    const IMAGE_BASE_URL = '/logo/';
    const SLOT_COUNT = 9;
    const FILE_PATTERN = /^(\d+)\.(.+)\.(webp|avif|png|jpe?g|gif|svg)$/i;
    const PLACEMENTS = [
      { id: 'singleExamAdStrip', slots: [1, 2, 3, 4, 5, 6, 7] },
      { id: 'singleExamSideAds', slots: [8, 9] },
      { id: 'examModeAdStrip', slots: [1, 2, 3, 4, 5, 6, 7] },
      { id: 'studentBoardSideAds', slots: [8, 9] }
    ];

    function createEmptySlot(slotNumber) {
      const slot = document.createElement('div');
      slot.className = 'single-exam-ad-slot is-empty';
      slot.setAttribute('aria-hidden', 'true');
      slot.dataset.adSlot = String(slotNumber);
      return slot;
    }

    function fileTimestamp(item) {
      const parsed = Date.parse(String(item && item.mtime || ''));
      return Number.isFinite(parsed) ? parsed : 0;
    }

    function encodedFileUrl(name, item) {
      const encodedName = String(name || '')
        .split('/')
        .map((part) => encodeURIComponent(part))
        .join('/');
      const version = String((item && item.mtime) || (item && item.size) || '').trim();
      return IMAGE_BASE_URL + encodedName + (version ? `?v=${encodeURIComponent(version)}` : '');
    }

    function readableLogoName(fileName, match) {
      const raw = String(match && match[2] || fileName || 'Logo quảng cáo')
        .replace(/[._-]+/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
      return raw || 'Logo quảng cáo';
    }

    function createFilledSlot(item, match, slotNumber) {
      const fileName = String(item && item.name || '');
      const displayName = readableLogoName(fileName, match);
      const isMvip = /\bmvip\b/i.test(displayName);
      const slot = document.createElement(isMvip ? 'a' : 'div');

      slot.className = 'single-exam-ad-slot is-filled';
      slot.dataset.adSlot = String(slotNumber);
      slot.setAttribute('aria-label', displayName);
      slot.title = displayName;

      if (isMvip) {
        slot.href = '/';
        slot.target = '_blank';
        slot.rel = 'noopener';
      }

      const img = document.createElement('img');
      img.className = 'single-exam-ad-img';
      img.alt = displayName;
      img.loading = 'lazy';
      img.decoding = 'async';
      img.width = 256;
      img.height = 256;
      img.src = encodedFileUrl(fileName, item);
      img.addEventListener('error', () => {
        slot.replaceWith(createEmptySlot(slotNumber));
      }, { once: true });

      slot.appendChild(img);
      return slot;
    }

    function chooseNewestBySlot(items) {
      const selected = new Map();
      let oldMvipFallback = null;

      for (const item of items) {
        if (!item || (item.type && String(item.type).toLowerCase() !== 'file')) continue;
        const name = String(item.name || '').trim();
        if (!name) continue;

        const match = name.match(FILE_PATTERN);
        if (!match) {
          if (/^mvip\.(webp|avif|png|jpe?g|gif|svg)$/i.test(name)) oldMvipFallback = item;
          continue;
        }

        const slotNumber = Number.parseInt(match[1], 10);
        if (!Number.isInteger(slotNumber) || slotNumber < 1 || slotNumber > SLOT_COUNT) continue;

        const previous = selected.get(slotNumber);
        if (!previous
          || fileTimestamp(item) > fileTimestamp(previous.item)
          || (fileTimestamp(item) === fileTimestamp(previous.item)
            && name.localeCompare(String(previous.item.name || ''), 'vi') > 0)) {
          selected.set(slotNumber, { item, match });
        }
      }

      if (!selected.has(1) && oldMvipFallback) {
        const fallbackMatch = ['mvip.webp', '1', 'mvip', 'webp'];
        selected.set(1, { item: oldMvipFallback, match: fallbackMatch });
      }

      return selected;
    }

    function renderPlacement(placement, selected) {
      const container = document.getElementById(placement.id);
      if (!container) return;
      const slots = placement.slots.map((slotNumber) => {
        const selectedItem = selected.get(slotNumber);
        return selectedItem
          ? createFilledSlot(selectedItem.item, selectedItem.match, slotNumber)
          : createEmptySlot(slotNumber);
      });
      container.replaceChildren(...slots);
      container.setAttribute('aria-busy', 'false');
      container.dataset.logoSource = 'automatic';
    }

    function setPlacementState(source) {
      PLACEMENTS.forEach((placement) => {
        const container = document.getElementById(placement.id);
        if (!container) return;
        container.setAttribute('aria-busy', 'false');
        container.dataset.logoSource = source;
      });
    }

    async function refreshMvipAdLogos() {
      try {
        const response = await fetch(LIST_URL, {
          cache: 'no-store',
          headers: { Accept: 'application/json' }
        });
        if (!response.ok) throw new Error(`HTTP ${response.status}`);

        const raw = (await response.text()).replace(/^\uFEFF/, '').trim();
        const parsed = JSON.parse(raw);
        const items = Array.isArray(parsed)
          ? parsed
          : (parsed && Array.isArray(parsed.items) ? parsed.items : []);

        const selected = chooseNewestBySlot(items);
        PLACEMENTS.forEach((placement) => renderPlacement(placement, selected));
      } catch (error) {
        setPlacementState('fallback');
        console.warn('Không tải được danh sách logo tự động:', error);
      }
    }

    window.refreshMvipAdLogos = refreshMvipAdLogos;
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', refreshMvipAdLogos, { once: true });
    } else {
      refreshMvipAdLogos();
    }
  })();
</script>

<script id="regular-test-word-resize-safety">window.addEventListener('resize',()=>{try{if(typeof scheduleRegularTestWordFit==='function')scheduleRegularTestWordFit();}catch(_){}});</script>
<!-- MVIP patch: source option layout + MathType baseline + DrawingML table scale, 2026-08-14 -->
<!-- MVIP_OFFICE_PRESET_GEOMETRY_BEGIN -->
<script id="mvip-office-preset-geometry-20260901">
/* DrawingML preset geometry adapted from @aiden0z/pptx-renderer.
 * Copyright its contributors; licensed under Apache-2.0.
 * Bundled locally so Word/Excel use the same preset geometry family as PowerPoint.
 */
(function (global) {
  'use strict';
function shapeArc(cx, cy, rx, ry, startAngle, endAngle, isClose) {
    const startRad = startAngle * Math.PI / 180;
    const endRad = endAngle * Math.PI / 180;
    const x1 = cx + rx * Math.cos(startRad);
    const y1 = cy + ry * Math.sin(startRad);
    const x2 = cx + rx * Math.cos(endRad);
    const y2 = cy + ry * Math.sin(endRad);
    let sweepDeg = ((endAngle - startAngle) % 360 + 360) % 360;
    if (sweepDeg === 0 && startAngle !== endAngle) sweepDeg = 360;
    const largeArc = sweepDeg > 180 ? 1 : 0;
    const sweep = 1;
    let d = `M${x1},${y1} A${rx},${ry} 0 ${largeArc},${sweep} ${x2},${y2}`;
    if (isClose) {
        d += ' Z';
    }
    return d;
}


function adj(adjustments, name, defaultVal) {
    const raw = adjustments?.get(name) ?? defaultVal;
    return raw / 100000;
}
function _regularPolygon(w, h, sides) {
    const cx = w / 2;
    const cy = h / 2;
    const rx = w / 2;
    const ry = h / 2;
    const parts = [];
    for(let i = 0; i < sides; i++){
        const angle = 2 * Math.PI * i / sides - Math.PI / 2;
        const x = cx + rx * Math.cos(angle);
        const y = cy + ry * Math.sin(angle);
        parts.push(i === 0 ? `M${x},${y}` : `L${x},${y}`);
    }
    parts.push('Z');
    return parts.join(' ');
}
function adjRaw(adjustments, name, defaultVal) {
    return adjustments?.get(name) ?? defaultVal;
}
function starShape(w, h, points, innerRatio = 0.4) {
    const cx = w / 2;
    const cy = h / 2;
    const outerRx = w / 2;
    const outerRy = h / 2;
    const innerRx = outerRx * innerRatio;
    const innerRy = outerRy * innerRatio;
    const totalPoints = points * 2;
    const parts = [];
    for(let i = 0; i < totalPoints; i++){
        const angle = 2 * Math.PI * i / totalPoints - Math.PI / 2;
        const isOuter = i % 2 === 0;
        const rx = isOuter ? outerRx : innerRx;
        const ry = isOuter ? outerRy : innerRy;
        const x = cx + rx * Math.cos(angle);
        const y = cy + ry * Math.sin(angle);
        parts.push(i === 0 ? `M${x},${y}` : `L${x},${y}`);
    }
    parts.push('Z');
    return parts.join(' ');
}
function mirrorAbsolutePathHorizontally(path, width) {
    const tokens = path.match(/[MLAZ]|-?\d*\.?\d+(?:e[-+]?\d+)?/gi);
    if (!tokens) return path;
    const out = [];
    let i = 0;
    while(i < tokens.length){
        const cmd = tokens[i++];
        if (!cmd) break;
        out.push(cmd);
        if (cmd === 'Z') continue;
        if (cmd === 'M' || cmd === 'L') {
            const x = Number(tokens[i++]);
            const y = Number(tokens[i++]);
            out.push(String(width - x), String(y));
            continue;
        }
        if (cmd === 'A') {
            const rx = tokens[i++];
            const ry = tokens[i++];
            const rot = tokens[i++];
            const largeArc = tokens[i++];
            const sweep = Number(tokens[i++]);
            const x = Number(tokens[i++]);
            const y = Number(tokens[i++]);
            out.push(rx, ry, rot, largeArc, String(sweep ? 0 : 1), String(width - x), String(y));
            continue;
        }
        return path;
    }
    return out.join(' ');
}
function mirrorAbsolutePathVertically(path, height) {
    const tokens = path.match(/[MLAZ]|-?\d*\.?\d+(?:e[-+]?\d+)?/gi);
    if (!tokens) return path;
    const out = [];
    let i = 0;
    while(i < tokens.length){
        const cmd = tokens[i++];
        if (!cmd) break;
        out.push(cmd);
        if (cmd === 'Z') continue;
        if (cmd === 'M' || cmd === 'L') {
            const x = Number(tokens[i++]);
            const y = Number(tokens[i++]);
            out.push(String(x), String(height - y));
            continue;
        }
        if (cmd === 'A') {
            const rx = tokens[i++];
            const ry = tokens[i++];
            const rot = tokens[i++];
            const largeArc = tokens[i++];
            const sweep = Number(tokens[i++]);
            const x = Number(tokens[i++]);
            const y = Number(tokens[i++]);
            out.push(rx, ry, rot, largeArc, String(sweep ? 0 : 1), String(x), String(height - y));
        }
    }
    return out.join(' ');
}
const presetShapes = new Map();
presetShapes.set('rect', (w, h)=>`M0,0 L${w},0 L${w},${h} L0,${h} Z`);
presetShapes.set('roundRect', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 16667);
    const r = Math.min(w, h) * a;
    return [
        `M${r},0`,
        `L${w - r},0`,
        `A${r},${r} 0 0,1 ${w},${r}`,
        `L${w},${h - r}`,
        `A${r},${r} 0 0,1 ${w - r},${h}`,
        `L${r},${h}`,
        `A${r},${r} 0 0,1 0,${h - r}`,
        `L0,${r}`,
        `A${r},${r} 0 0,1 ${r},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('plaque', (w, h, adjustments)=>{
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 16667), 0), 50000);
    const x1 = Math.min(w, h) * a / 100000;
    const x2 = w - x1;
    const y2 = h - x1;
    const a1 = ooArcTo(0, x1, x1, x1, 90, -90);
    const a2 = ooArcTo(x2, 0, x1, x1, 180, -90);
    const a3 = ooArcTo(w, y2, x1, x1, 270, -90);
    const a4 = ooArcTo(x1, h, x1, x1, 0, -90);
    return [
        `M0,${x1}`,
        a1.svg,
        `L${x2},0`,
        a2.svg,
        `L${w},${y2}`,
        a3.svg,
        `L${x1},${h}`,
        a4.svg,
        'Z'
    ].join(' ');
});
presetShapes.set('cornerTabs', (w, h)=>{
    const dx = Math.sqrt(w * w + h * h) / 20;
    return [
        `M0,0 L${dx},0 L0,${dx} Z`,
        `M${w},0 L${w - dx},0 L${w},${dx} Z`,
        `M${w},${h} L${w - dx},${h} L${w},${h - dx} Z`,
        `M0,${h} L${dx},${h} L0,${h - dx} Z`
    ].join(' ');
});
presetShapes.set('squareTabs', (w, h)=>{
    const dx = Math.sqrt(w * w + h * h) / 20;
    return [
        `M0,0 L${dx},0 L${dx},${dx} L0,${dx} Z`,
        `M${w - dx},0 L${w},0 L${w},${dx} L${w - dx},${dx} Z`,
        `M0,${h - dx} L${dx},${h - dx} L${dx},${h} L0,${h} Z`,
        `M${w - dx},${h - dx} L${w},${h - dx} L${w},${h} L${w - dx},${h} Z`
    ].join(' ');
});
presetShapes.set('plaqueTabs', (w, h)=>{
    const dx = Math.sqrt(w * w + h * h) / 20;
    return [
        `M0,0 L${dx},0 A${dx},${dx} 0 0,1 0,${dx} Z`,
        `M${w},0 L${w - dx},0 A${dx},${dx} 0 0,0 ${w},${dx} Z`,
        `M0,${h} L0,${h - dx} A${dx},${dx} 0 0,1 ${dx},${h} Z`,
        `M${w},${h} L${w - dx},${h} A${dx},${dx} 0 0,1 ${w},${h - dx} Z`
    ].join(' ');
});
presetShapes.set('ellipse', (w, h)=>{
    const rx = w / 2;
    const ry = h / 2;
    return [
        `M${w},${ry}`,
        `A${rx},${ry} 0 1,1 0,${ry}`,
        `A${rx},${ry} 0 1,1 ${w},${ry}`,
        'Z'
    ].join(' ');
});
presetShapes.set('triangle', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 50000);
    const topX = w * a;
    return `M${topX},0 L${w},${h} L0,${h} Z`;
});
presetShapes.set('isosTriangle', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 50000);
    const topX = w * a;
    return `M${topX},0 L${w},${h} L0,${h} Z`;
});
presetShapes.set('rtTriangle', (w, h)=>`M0,0 L${w},${h} L0,${h} Z`);
presetShapes.set('diamond', (w, h)=>{
    const cx = w / 2;
    const cy = h / 2;
    return `M${cx},0 L${w},${cy} L${cx},${h} L0,${cy} Z`;
});
presetShapes.set('pentagon', (w, h)=>{
    const hc = w / 2;
    const swd2 = hc * 105146 / 100000;
    const shd2 = h / 2 * 110557 / 100000;
    const svc = shd2;
    const dx1 = swd2 * Math.cos(18 * Math.PI / 180);
    const dx2 = swd2 * Math.cos(54 * Math.PI / 180);
    const dy1 = shd2 * Math.sin(18 * Math.PI / 180);
    const dy2 = shd2 * Math.sin(54 * Math.PI / 180);
    return [
        `M${hc - dx1},${svc - dy1}`,
        `L${hc},0`,
        `L${hc + dx1},${svc - dy1}`,
        `L${hc + dx2},${svc + dy2}`,
        `L${hc - dx2},${svc + dy2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('hexagon', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 25000), 0), ss > 0 ? 50000 * w / ss : 50000);
    const vf = 115470;
    const shd2 = h / 2 * vf / 100000;
    const x1 = ss * a / 100000;
    const x2 = w - x1;
    const _hc = w / 2;
    const vc = h / 2;
    const dy1 = shd2 * Math.sin(60 * Math.PI / 180);
    const y1 = vc - dy1;
    const y2 = vc + dy1;
    return [
        `M0,${vc}`,
        `L${x1},${y1}`,
        `L${x2},${y1}`,
        `L${w},${vc}`,
        `L${x2},${y2}`,
        `L${x1},${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('octagon', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 29289), 0), 50000);
    const x1 = ss * a / 100000;
    const x2 = w - x1;
    const y2 = h - x1;
    return [
        `M0,${x1}`,
        `L${x1},0`,
        `L${x2},0`,
        `L${w},${x1}`,
        `L${w},${y2}`,
        `L${x2},${h}`,
        `L${x1},${h}`,
        `L0,${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('heptagon', (w, h)=>{
    const hc = w / 2;
    const swd2 = hc * 102572 / 100000;
    const shd2 = h / 2 * 105210 / 100000;
    const svc = h / 2 * 105210 / 100000;
    const dx1 = swd2 * 97493 / 100000;
    const dx2 = swd2 * 78183 / 100000;
    const dx3 = swd2 * 43388 / 100000;
    const dy1 = shd2 * 62349 / 100000;
    const dy2 = shd2 * 22252 / 100000;
    const dy3 = shd2 * 90097 / 100000;
    return [
        `M${hc - dx1},${svc + dy2}`,
        `L${hc - dx2},${svc - dy1}`,
        `L${hc},0`,
        `L${hc + dx2},${svc - dy1}`,
        `L${hc + dx1},${svc + dy2}`,
        `L${hc + dx3},${svc + dy3}`,
        `L${hc - dx3},${svc + dy3}`,
        'Z'
    ].join(' ');
});
presetShapes.set('decagon', (w, h)=>{
    const hc = w / 2;
    const vc = h / 2;
    const shd2 = vc * 105146 / 100000;
    const dx1 = hc * Math.cos(36 * Math.PI / 180);
    const dx2 = hc * Math.cos(72 * Math.PI / 180);
    const dy1 = shd2 * Math.sin(72 * Math.PI / 180);
    const dy2 = shd2 * Math.sin(36 * Math.PI / 180);
    return [
        `M0,${vc}`,
        `L${hc - dx1},${vc - dy2}`,
        `L${hc - dx2},${vc - dy1}`,
        `L${hc + dx2},${vc - dy1}`,
        `L${hc + dx1},${vc - dy2}`,
        `L${w},${vc}`,
        `L${hc + dx1},${vc + dy2}`,
        `L${hc + dx2},${vc + dy1}`,
        `L${hc - dx2},${vc + dy1}`,
        `L${hc - dx1},${vc + dy2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('dodecagon', (w, h)=>{
    const x1 = w * 2894 / 21600;
    const x2 = w * 7906 / 21600;
    const x3 = w * 13694 / 21600;
    const x4 = w * 18706 / 21600;
    const y1 = h * 2894 / 21600;
    const y2 = h * 7906 / 21600;
    const y3 = h * 13694 / 21600;
    const y4 = h * 18706 / 21600;
    return [
        `M0,${y2}`,
        `L${x1},${y1}`,
        `L${x2},0`,
        `L${x3},0`,
        `L${x4},${y1}`,
        `L${w},${y2}`,
        `L${w},${y3}`,
        `L${x4},${y4}`,
        `L${x3},${h}`,
        `L${x2},${h}`,
        `L${x1},${y4}`,
        `L0,${y3}`,
        'Z'
    ].join(' ');
});
presetShapes.set('parallelogram', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = ss > 0 ? 100000 * w / ss : 100000;
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 25000), 0), maxAdj);
    const x2 = ss * a / 100000;
    const x5 = w - x2;
    return `M0,${h} L${x2},0 L${w},0 L${x5},${h} Z`;
});
presetShapes.set('trapezoid', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = ss > 0 ? 50000 * w / ss : 50000;
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 25000), 0), maxAdj);
    const x2 = ss * a / 100000;
    const x3 = w - x2;
    return `M0,${h} L${x2},0 L${x3},0 L${w},${h} Z`;
});
presetShapes.set('nonIsoscelesTrapezoid', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = ss > 0 ? 50000 * w / ss : 50000;
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 25000), 0), maxAdj);
    const a2 = Math.min(Math.max(adjRaw(adjustments, 'adj2', 25000), 0), maxAdj);
    const x2 = ss * a1 / 100000;
    const dx3 = ss * a2 / 100000;
    const x3 = w - dx3;
    return `M0,${h} L${x2},0 L${x3},0 L${w},${h} Z`;
});
presetShapes.set('corner', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a1 = Math.min(Math.max(adj(adjustments, 'adj1', 50000), 0), 1);
    const a2 = Math.min(Math.max(adj(adjustments, 'adj2', 50000), 0), 1);
    const x1 = ss * a2;
    const dy1 = ss * a1;
    const y1 = h - dy1;
    return [
        `M0,0`,
        `L${x1},0`,
        `L${x1},${y1}`,
        `L${w},${y1}`,
        `L${w},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('diagStripe', (w, h, adjustments)=>{
    const a = Math.min(Math.max(adj(adjustments, 'adj', 50000), 0), 1);
    const x2 = w * a;
    const y2 = h * a;
    return [
        `M0,${y2}`,
        `L${x2},0`,
        `L${w},0`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('star4', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 12500) * 2;
    return starShape(w, h, 4, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('star5', (w, h, adjustments)=>{
    const aRaw = adjustments?.get('adj') ?? 19098;
    const a = Math.min(Math.max(aRaw, 0), 50000);
    const hf = 105146;
    const vf = 110557;
    const swd2 = w / 2 * hf / 100000;
    const shd2 = h / 2 * vf / 100000;
    const svc = h / 2 * vf / 100000;
    const iwd2 = swd2 * a / 50000;
    const ihd2 = shd2 * a / 50000;
    const cx = w / 2;
    const step = 2 * Math.PI / 5;
    const halfStep = step / 2;
    const startAngle = -Math.PI / 2;
    const parts = [];
    for(let i = 0; i < 5; i++){
        const outerAngle = startAngle + step * i;
        const innerAngle = outerAngle + halfStep;
        const ox = cx + swd2 * Math.cos(outerAngle);
        const oy = svc + shd2 * Math.sin(outerAngle);
        const ix = cx + iwd2 * Math.cos(innerAngle);
        const iy = svc + ihd2 * Math.sin(innerAngle);
        parts.push(i === 0 ? `M${ox},${oy}` : `L${ox},${oy}`);
        parts.push(`L${ix},${iy}`);
    }
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('star6', (w, h, adjustments)=>{
    const aRaw = adjustments?.get('adj') ?? 28868;
    const a = Math.min(Math.max(aRaw, 0), 50000);
    const hf = 115470;
    const swd2 = w / 2 * hf / 100000;
    const shd2 = h / 2;
    const iwd2 = swd2 * a / 50000;
    const ihd2 = shd2 * a / 50000;
    const cx = w / 2;
    const cy = h / 2;
    const step = 2 * Math.PI / 6;
    const halfStep = step / 2;
    const startAngle = -Math.PI / 2;
    const parts = [];
    for(let i = 0; i < 6; i++){
        const outerAngle = startAngle + step * i;
        const innerAngle = outerAngle + halfStep;
        const ox = cx + swd2 * Math.cos(outerAngle);
        const oy = cy + shd2 * Math.sin(outerAngle);
        const ix = cx + iwd2 * Math.cos(innerAngle);
        const iy = cy + ihd2 * Math.sin(innerAngle);
        parts.push(i === 0 ? `M${ox},${oy}` : `L${ox},${oy}`);
        parts.push(`L${ix},${iy}`);
    }
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('star7', (w, h, adjustments)=>{
    const aRaw = adjustments?.get('adj') ?? 34601;
    const a = Math.min(Math.max(aRaw, 0), 50000);
    const swd2 = w / 2 * 102572 / 100000;
    const shd2 = h / 2 * 105210 / 100000;
    const svc = shd2;
    const iwd2 = swd2 * a / 50000;
    const ihd2 = shd2 * a / 50000;
    const cx = w / 2;
    const step = 2 * Math.PI / 7;
    const halfStep = step / 2;
    const startAngle = -Math.PI / 2;
    const parts = [];
    for(let i = 0; i < 7; i++){
        const outerAngle = startAngle + step * i;
        const innerAngle = outerAngle + halfStep;
        const ox = cx + swd2 * Math.cos(outerAngle);
        const oy = svc + shd2 * Math.sin(outerAngle);
        const ix = cx + iwd2 * Math.cos(innerAngle);
        const iy = svc + ihd2 * Math.sin(innerAngle);
        parts.push(i === 0 ? `M${ox},${oy}` : `L${ox},${oy}`);
        parts.push(`L${ix},${iy}`);
    }
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('star8', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 37500) * 2;
    return starShape(w, h, 8, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('star10', (w, h, adjustments)=>{
    const aRaw = adjustments?.get('adj') ?? 42533;
    const a = Math.min(Math.max(aRaw, 0), 50000);
    const hf = 105146;
    const swd2 = w / 2 * hf / 100000;
    const shd2 = h / 2;
    const iwd2 = swd2 * a / 50000;
    const ihd2 = shd2 * a / 50000;
    const cx = w / 2;
    const cy = h / 2;
    const step = 2 * Math.PI / 10;
    const halfStep = step / 2;
    const startAngle = -Math.PI / 2;
    const parts = [];
    for(let i = 0; i < 10; i++){
        const outerAngle = startAngle + step * i;
        const innerAngle = outerAngle + halfStep;
        const ox = cx + swd2 * Math.cos(outerAngle);
        const oy = cy + shd2 * Math.sin(outerAngle);
        const ix = cx + iwd2 * Math.cos(innerAngle);
        const iy = cy + ihd2 * Math.sin(innerAngle);
        parts.push(i === 0 ? `M${ox},${oy}` : `L${ox},${oy}`);
        parts.push(`L${ix},${iy}`);
    }
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('star12', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 37500) * 2;
    return starShape(w, h, 12, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('star16', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 37500) * 2;
    return starShape(w, h, 16, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('star24', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 37500) * 2;
    return starShape(w, h, 24, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('star32', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 37500) * 2;
    return starShape(w, h, 32, Math.min(Math.max(a, 0), 1));
});
presetShapes.set('line', (w, h)=>{
    const safeH = h || 1;
    const safeW = w || 1;
    if (w === 0) return `M0.5,0 L0.5,${safeH}`;
    if (h === 0) return `M0,0.5 L${safeW},0.5`;
    return `M0,0 L${w},${h}`;
});
presetShapes.set('lineInv', (w, h)=>{
    const safeH = h || 1;
    const safeW = w || 1;
    if (w === 0) return `M0.5,0 L0.5,${safeH}`;
    if (h === 0) return `M0,0.5 L${safeW},0.5`;
    return `M${w},0 L0,${h}`;
});
presetShapes.set('straightConnector1', (w, h)=>{
    const safeH = h || 1;
    const safeW = w || 1;
    if (w === 0) return `M0.5,0 L0.5,${safeH}`;
    if (h === 0) return `M0,0.5 L${safeW},0.5`;
    return `M0,0 L${w},${h}`;
});
presetShapes.set('bentConnector2', (w, h)=>`M0,0 L${w},0 L${w},${h}`);
presetShapes.set('bentConnector3', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj1', 50000);
    const midX = w * a;
    return `M0,0 L${midX},0 L${midX},${h} L${w},${h}`;
});
presetShapes.set('bentConnector4', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const midX = w * a1;
    const midY = h * a2;
    return `M0,0 L${midX},0 L${midX},${midY} L${w},${midY} L${w},${h}`;
});
presetShapes.set('curvedConnector2', (w, h)=>{
    return `M0,0 C${w / 2},0 ${w},${h / 2} ${w},${h}`;
});
presetShapes.set('curvedConnector3', (w, h, adjustments)=>{
    const x2 = w * adj(adjustments, 'adj1', 50000);
    const x1 = x2 / 2;
    const x3 = (w + x2) / 2;
    const vc = h / 2;
    const hd4 = h / 4;
    const y3 = h * 3 / 4;
    return `M0,0 C${x1},0 ${x2},${hd4} ${x2},${vc} C${x2},${y3} ${x3},${h} ${w},${h}`;
});
presetShapes.set('curvedConnector4', (w, h, adjustments)=>{
    const x2 = w * adj(adjustments, 'adj1', 50000);
    const y4 = h * adj(adjustments, 'adj2', 50000);
    const x1 = x2 / 2;
    const x3 = (w + x2) / 2;
    const x4 = (x2 + x3) / 2;
    const x5 = (x3 + w) / 2;
    const y1 = y4 / 2;
    const y2 = y1 / 2;
    const y3 = (y1 + y4) / 2;
    const y5 = (h + y4) / 2;
    return [
        `M0,0`,
        `C${x1},0 ${x2},${y2} ${x2},${y1}`,
        `C${x2},${y3} ${x4},${y4} ${x3},${y4}`,
        `C${x5},${y4} ${w},${y5} ${w},${h}`
    ].join(' ');
});
presetShapes.set('curvedConnector5', (w, h, adjustments)=>{
    const x3 = w * adj(adjustments, 'adj1', 50000);
    const y4 = h * adj(adjustments, 'adj2', 50000);
    const x6 = w * adj(adjustments, 'adj3', 50000);
    const x1 = (x3 + x6) / 2;
    const x2 = x3 / 2;
    const x4 = (x3 + x1) / 2;
    const x5 = (x6 + x1) / 2;
    const x7 = (x6 + w) / 2;
    const y1 = y4 / 2;
    const y2 = y1 / 2;
    const y3 = (y1 + y4) / 2;
    const y5 = (h + y4) / 2;
    const y6 = (y5 + y4) / 2;
    const y7 = (y5 + h) / 2;
    return [
        `M0,0`,
        `C${x2},0 ${x3},${y2} ${x3},${y1}`,
        `C${x3},${y3} ${x4},${y4} ${x1},${y4}`,
        `C${x5},${y4} ${x6},${y6} ${x6},${y5}`,
        `C${x6},${y7} ${x7},${h} ${w},${h}`
    ].join(' ');
});
presetShapes.set('bentConnector5', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const a3 = adj(adjustments, 'adj3', 50000);
    const x1 = w * a1;
    const y1 = h * a2;
    const x2 = w * a3;
    return `M0,0 L${x1},0 L${x1},${y1} L${x2},${y1} L${x2},${h} L${w},${h}`;
});
presetShapes.set('rightArrow', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const ss = Math.min(w, h);
    const shaftHalfH = h * a1 / 2;
    const headLen = ss * a2;
    const cy = h / 2;
    const shaftEnd = w - headLen;
    return [
        `M0,${cy - shaftHalfH}`,
        `L${shaftEnd},${cy - shaftHalfH}`,
        `L${shaftEnd},0`,
        `L${w},${cy}`,
        `L${shaftEnd},${h}`,
        `L${shaftEnd},${cy + shaftHalfH}`,
        `L0,${cy + shaftHalfH}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftArrow', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const ss = Math.min(w, h);
    const shaftHalfH = h * a1 / 2;
    const headLen = ss * a2;
    const cy = h / 2;
    return [
        `M${w},${cy - shaftHalfH}`,
        `L${headLen},${cy - shaftHalfH}`,
        `L${headLen},0`,
        `L0,${cy}`,
        `L${headLen},${h}`,
        `L${headLen},${cy + shaftHalfH}`,
        `L${w},${cy + shaftHalfH}`,
        'Z'
    ].join(' ');
});
presetShapes.set('upArrow', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const shaftHalfW = w * a1 / 2;
    const headLen = h * a2;
    const cx = w / 2;
    return [
        `M${cx - shaftHalfW},${h}`,
        `L${cx - shaftHalfW},${headLen}`,
        `L0,${headLen}`,
        `L${cx},0`,
        `L${w},${headLen}`,
        `L${cx + shaftHalfW},${headLen}`,
        `L${cx + shaftHalfW},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('downArrow', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const shaftHalfW = w * a1 / 2;
    const headLen = h * a2;
    const cx = w / 2;
    const shaftEnd = h - headLen;
    return [
        `M${cx - shaftHalfW},0`,
        `L${cx + shaftHalfW},0`,
        `L${cx + shaftHalfW},${shaftEnd}`,
        `L${w},${shaftEnd}`,
        `L${cx},${h}`,
        `L0,${shaftEnd}`,
        `L${cx - shaftHalfW},${shaftEnd}`,
        'Z'
    ].join(' ');
});
presetShapes.set('downArrowCallout', (w, h, adjustments)=>{
    const adj1 = adjustments?.get('adj1') ?? 25000;
    const adj2 = adjustments?.get('adj2') ?? 25000;
    const adj3 = adjustments?.get('adj3') ?? 25000;
    const adj4 = adjustments?.get('adj4') ?? 64977;
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2, 50000 * w / Math.max(ss, 1)));
    const a1 = Math.max(0, Math.min(adj1, a2 * 2));
    const a3 = Math.max(0, Math.min(adj3, 100000 * h / Math.max(ss, 1)));
    const q2 = a3 * ss / Math.max(h, 1);
    const a4 = Math.max(0, Math.min(adj4, 100000 - q2));
    const hc = w / 2;
    const dx1 = ss * a2 / 100000;
    const dx2 = ss * a1 / 200000;
    const x1 = hc - dx1;
    const x2 = hc - dx2;
    const x3 = hc + dx2;
    const x4 = hc + dx1;
    const y3 = h - ss * a3 / 100000;
    const y2 = h * a4 / 100000;
    return [
        `M0,0`,
        `L${w},0`,
        `L${w},${y2}`,
        `L${x3},${y2}`,
        `L${x3},${y3}`,
        `L${x4},${y3}`,
        `L${hc},${h}`,
        `L${x1},${y3}`,
        `L${x2},${y3}`,
        `L${x2},${y2}`,
        `L0,${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('rightArrowCallout', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj2 = 50000 * h / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, maxAdj2));
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, a2 * 2));
    const maxAdj3 = 100000 * w / Math.max(ss, 1);
    const a3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, maxAdj3));
    const q2 = a3 * ss / Math.max(w, 1);
    const a4 = Math.max(0, Math.min(adjustments?.get('adj4') ?? 64977, 100000 - q2));
    const vc = h / 2;
    const dy1 = ss * a2 / 100000;
    const dy2 = ss * a1 / 200000;
    const y1 = vc - dy1;
    const y2 = vc - dy2;
    const y3 = vc + dy2;
    const y4 = vc + dy1;
    const dx3 = ss * a3 / 100000;
    const x3 = w - dx3;
    const x2 = w * a4 / 100000;
    return [
        `M0,0`,
        `L${x2},0`,
        `L${x2},${y2}`,
        `L${x3},${y2}`,
        `L${x3},${y1}`,
        `L${w},${vc}`,
        `L${x3},${y4}`,
        `L${x3},${y3}`,
        `L${x2},${y3}`,
        `L${x2},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftArrowCallout', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj2 = 50000 * h / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, maxAdj2));
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, a2 * 2));
    const maxAdj3 = 100000 * w / Math.max(ss, 1);
    const a3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, maxAdj3));
    const q2 = a3 * ss / Math.max(w, 1);
    const a4 = Math.max(0, Math.min(adjustments?.get('adj4') ?? 64977, 100000 - q2));
    const vc = h / 2;
    const dy1 = ss * a2 / 100000;
    const dy2 = ss * a1 / 200000;
    const y1 = vc - dy1;
    const y2 = vc - dy2;
    const y3 = vc + dy2;
    const y4 = vc + dy1;
    const x1 = ss * a3 / 100000;
    const dx2 = w * a4 / 100000;
    const x2 = w - dx2;
    return [
        `M0,${vc}`,
        `L${x1},${y1}`,
        `L${x1},${y2}`,
        `L${x2},${y2}`,
        `L${x2},0`,
        `L${w},0`,
        `L${w},${h}`,
        `L${x2},${h}`,
        `L${x2},${y3}`,
        `L${x1},${y3}`,
        `L${x1},${y4}`,
        'Z'
    ].join(' ');
});
presetShapes.set('upArrowCallout', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj2 = 50000 * w / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, maxAdj2));
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, a2 * 2));
    const maxAdj3 = 100000 * h / Math.max(ss, 1);
    const a3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, maxAdj3));
    const q2 = a3 * ss / Math.max(h, 1);
    const a4 = Math.max(0, Math.min(adjustments?.get('adj4') ?? 64977, 100000 - q2));
    const hc = w / 2;
    const dx1 = ss * a2 / 100000;
    const dx2 = ss * a1 / 200000;
    const x1 = hc - dx1;
    const x2 = hc - dx2;
    const x3 = hc + dx2;
    const x4 = hc + dx1;
    const y1 = ss * a3 / 100000;
    const dy2 = h * a4 / 100000;
    const y2 = h - dy2;
    return [
        `M0,${y2}`,
        `L${x2},${y2}`,
        `L${x2},${y1}`,
        `L${x1},${y1}`,
        `L${hc},0`,
        `L${x4},${y1}`,
        `L${x3},${y1}`,
        `L${x3},${y2}`,
        `L${w},${y2}`,
        `L${w},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('upDownArrowCallout', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 25000;
    const adj2Raw = adjustments?.get('adj2') ?? 25000;
    const adj3Raw = adjustments?.get('adj3') ?? 25000;
    const adj4Raw = adjustments?.get('adj4') ?? 48123;
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2Raw, 50000 * w / Math.max(ss, 1)));
    const a1 = Math.max(0, Math.min(adj1Raw, a2 * 2));
    const a3 = Math.max(0, Math.min(adj3Raw, 50000 * h / Math.max(ss, 1)));
    const q2 = a3 * ss / Math.max(h, 1);
    const a4 = Math.max(0, Math.min(adj4Raw, 100000 - q2 - q2));
    const dx1 = ss * a2 / 100000;
    const dx2 = ss * a1 / 200000;
    const hc = w / 2;
    const x1 = hc - dx1;
    const x2 = hc - dx2;
    const x3 = hc + dx2;
    const x4 = hc + dx1;
    const y1 = ss * a3 / 100000;
    const dy2 = h * a4 / 200000;
    const y2 = h / 2 - dy2;
    const y3 = h / 2 + dy2;
    const y4 = h - y1;
    return [
        `M${hc},0`,
        `L${x4},${y1}`,
        `L${x3},${y1}`,
        `L${x3},${y2}`,
        `L${w},${y2}`,
        `L${w},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${y4}`,
        `L${x4},${y4}`,
        `L${hc},${h}`,
        `L${x1},${y4}`,
        `L${x2},${y4}`,
        `L${x2},${y3}`,
        `L0,${y3}`,
        `L0,${y2}`,
        `L${x2},${y2}`,
        `L${x2},${y1}`,
        `L${x1},${y1}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftRightArrowCallout', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 25000;
    const adj2Raw = adjustments?.get('adj2') ?? 25000;
    const adj3Raw = adjustments?.get('adj3') ?? 25000;
    const adj4Raw = adjustments?.get('adj4') ?? 48123;
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2Raw, 50000 * h / Math.max(ss, 1)));
    const a1 = Math.max(0, Math.min(adj1Raw, a2 * 2));
    const a3 = Math.max(0, Math.min(adj3Raw, 50000 * w / Math.max(ss, 1)));
    const q2 = a3 * ss / Math.max(w, 1);
    const a4 = Math.max(0, Math.min(adj4Raw, 100000 - q2 - q2));
    const dy1 = ss * a2 / 100000;
    const dy2 = ss * a1 / 200000;
    const vc = h / 2;
    const y1 = vc - dy1;
    const y2 = vc - dy2;
    const y3 = vc + dy2;
    const y4 = vc + dy1;
    const x1 = ss * a3 / 100000;
    const dx2 = w * a4 / 200000;
    const x2 = w / 2 - dx2;
    const x3 = w / 2 + dx2;
    const x4 = w - x1;
    return [
        `M0,${vc}`,
        `L${x1},${y1}`,
        `L${x1},${y2}`,
        `L${x2},${y2}`,
        `L${x2},0`,
        `L${x3},0`,
        `L${x3},${y2}`,
        `L${x4},${y2}`,
        `L${x4},${y1}`,
        `L${w},${vc}`,
        `L${x4},${y4}`,
        `L${x4},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${h}`,
        `L${x2},${h}`,
        `L${x2},${y3}`,
        `L${x1},${y3}`,
        `L${x1},${y4}`,
        'Z'
    ].join(' ');
});
presetShapes.set('uturnArrow', (w, h, adjustments)=>{
    const adj1 = adjustments?.get('adj1') ?? 25000;
    const adj2 = adjustments?.get('adj2') ?? 25000;
    const adj3 = adjustments?.get('adj3') ?? 25000;
    const adj4 = adjustments?.get('adj4') ?? 43750;
    const adj5 = adjustments?.get('adj5') ?? 75000;
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2, 25000));
    const a1 = Math.max(0, Math.min(adj1, a2 * 2));
    const q2 = a1 * ss / Math.max(h, 1);
    const q3 = 100000 - q2;
    const a3 = Math.max(0, Math.min(adj3, q3 * h / Math.max(ss, 1)));
    const minAdj5 = (a3 + a1) * ss / Math.max(h, 1);
    const a5 = Math.max(minAdj5, Math.min(adj5, 100000));
    const th = ss * a1 / 100000;
    const aw2 = ss * a2 / 100000;
    const th2 = th / 2;
    const dh2 = aw2 - th2;
    const y5 = h * a5 / 100000;
    const ah = ss * a3 / 100000;
    const y4 = y5 - ah;
    const x9 = w - dh2;
    const bs = Math.min(x9 / 2, y4);
    const a4 = Math.max(0, Math.min(adj4, 100000 * bs / Math.max(ss, 1)));
    const bd = ss * a4 / 100000;
    const bd2 = Math.max(bd - th, 0);
    const x3 = th + bd2;
    const x8 = w - aw2;
    const x6 = x8 - aw2;
    const x7 = x6 + dh2;
    const x4 = x9 - bd;
    const x5 = x7 - bd2;
    return [
        `M0,${h}`,
        `L0,${bd}`,
        bd > 0.1 ? `A${bd},${bd} 0 0,1 ${bd},0` : `L0,0`,
        `L${x4},0`,
        bd > 0.1 ? `A${bd},${bd} 0 0,1 ${x9},${bd}` : `L${x9},0`,
        `L${x9},${y4}`,
        `L${w},${y4}`,
        `L${x8},${y5}`,
        `L${x6},${y4}`,
        `L${x7},${y4}`,
        `L${x7},${x3}`,
        bd2 > 0.1 ? `A${bd2},${bd2} 0 0,0 ${x5},${th}` : `L${x5},${th}`,
        `L${x3},${th}`,
        bd2 > 0.1 ? `A${bd2},${bd2} 0 0,0 ${th},${x3}` : `L${th},${x3}`,
        `L${th},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftRightArrow', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const hd2 = h / 2;
    const maxAdj2 = ss > 0 ? 50000 * w / ss : 0;
    const a1 = Math.min(Math.max(adjustments?.get('adj1') ?? 50000, 0), 100000);
    const a2 = Math.min(Math.max(adjustments?.get('adj2') ?? 50000, 0), maxAdj2);
    const x2 = ss * a2 / 100000;
    const x3 = w - x2;
    const dy = h * a1 / 200000;
    const vc = hd2;
    const y1 = vc - dy;
    const y2 = vc + dy;
    const dx1 = hd2 > 0 ? y1 * x2 / hd2 : 0;
    const _x1 = x2 - dx1;
    const _x4 = x3 + dx1;
    return [
        `M0,${vc}`,
        `L${x2},0`,
        `L${x2},${y1}`,
        `L${x3},${y1}`,
        `L${x3},0`,
        `L${w},${vc}`,
        `L${x3},${h}`,
        `L${x3},${y2}`,
        `L${x2},${y2}`,
        `L${x2},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftUpArrow', (w, h, adjustments)=>{
    const rawAdj2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, 50000));
    const maxAdj1 = rawAdj2 * 2;
    const rawAdj1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, maxAdj1));
    const maxAdj3 = 100000 - maxAdj1;
    const rawAdj3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, maxAdj3));
    const ss = Math.min(w, h);
    const x1 = ss * rawAdj3 / 100000;
    const dx2 = ss * rawAdj2 / 50000;
    const x2 = w - dx2;
    const y2 = h - dx2;
    const dx4 = ss * rawAdj2 / 100000;
    const x4 = w - dx4;
    const y4 = h - dx4;
    const dx3 = ss * rawAdj1 / 200000;
    const x3 = x4 - dx3;
    const x5 = x4 + dx3;
    const y3 = y4 - dx3;
    const y5 = y4 + dx3;
    return [
        `M0,${y4}`,
        `L${x1},${y2}`,
        `L${x1},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${x1}`,
        `L${x2},${x1}`,
        `L${x4},0`,
        `L${w},${x1}`,
        `L${x5},${x1}`,
        `L${x5},${y5}`,
        `L${x1},${y5}`,
        `L${x1},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('upDownArrow', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 50000;
    const adj2Raw = adjustments?.get('adj2') ?? 50000;
    const ss = Math.min(w, h);
    const maxAdj2 = 50000 * h / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(adj2Raw, maxAdj2));
    const a1 = Math.max(0, Math.min(adj1Raw, 100000));
    const dx1 = ss * a1 / 200000;
    const dy = ss * a2 / 100000;
    const hc = w / 2;
    return [
        `M${hc},0`,
        `L${w},${dy}`,
        `L${hc + dx1},${dy}`,
        `L${hc + dx1},${h - dy}`,
        `L${w},${h - dy}`,
        `L${hc},${h}`,
        `L0,${h - dy}`,
        `L${hc - dx1},${h - dy}`,
        `L${hc - dx1},${dy}`,
        `L0,${dy}`,
        'Z'
    ].join(' ');
});
presetShapes.set('notchedRightArrow', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 50000);
    const a2 = adj(adjustments, 'adj2', 50000);
    const ss = Math.min(w, h);
    const shaftHalfH = h * a1 / 2;
    const headLen = ss * a2;
    const cy = h / 2;
    const shaftEnd = w - headLen;
    const notchDepth = cy > 0 ? shaftHalfH * headLen / cy : 0;
    return [
        `M0,${cy - shaftHalfH}`,
        `L${shaftEnd},${cy - shaftHalfH}`,
        `L${shaftEnd},0`,
        `L${w},${cy}`,
        `L${shaftEnd},${h}`,
        `L${shaftEnd},${cy + shaftHalfH}`,
        `L0,${cy + shaftHalfH}`,
        `L${notchDepth},${cy}`,
        'Z'
    ].join(' ');
});
presetShapes.set('chevron', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 50000);
    const ss = Math.min(w, h);
    const offset = ss * a;
    return [
        `M0,0`,
        `L${w - offset},0`,
        `L${w},${h / 2}`,
        `L${w - offset},${h}`,
        `L0,${h}`,
        `L${offset},${h / 2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('homePlate', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 50000);
    const ss = Math.min(w, h);
    const offset = ss * a;
    const shoulderX = w - offset;
    return [
        `M0,0`,
        `L${shoulderX},0`,
        `L${w},${h / 2}`,
        `L${shoulderX},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('stripedRightArrow', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj2 = ss > 0 ? 84375 * w / ss : 84375;
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 50000), 0), 100000);
    const a2 = Math.min(Math.max(adjRaw(adjustments, 'adj2', 50000), 0), maxAdj2);
    const dy1 = h * a1 / 200000;
    const dx5 = ss * a2 / 100000;
    const x5 = w - dx5;
    const vc = h / 2;
    const y1 = vc - dy1;
    const y2 = vc + dy1;
    const ssd32 = ss / 32;
    const ssd16 = ss / 16;
    const ssd8 = ss / 8;
    const x4 = ss * 5 / 32;
    return [
        `M0,${y1} L${ssd32},${y1} L${ssd32},${y2} L0,${y2} Z`,
        `M${ssd16},${y1} L${ssd8},${y1} L${ssd8},${y2} L${ssd16},${y2} Z`,
        `M${x4},${y1}`,
        `L${x5},${y1}`,
        `L${x5},0`,
        `L${w},${vc}`,
        `L${x5},${h}`,
        `L${x5},${y2}`,
        `L${x4},${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('bentArrow', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const adj2Raw = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, 50000));
    const maxAdj1 = adj2Raw * 2;
    const adj1Raw = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, maxAdj1));
    const adj3Raw = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, 50000));
    const th = ss * adj1Raw / 100000;
    const aw2 = ss * adj2Raw / 100000;
    const th2 = th / 2;
    const dh2 = aw2 - th2;
    const ah = ss * adj3Raw / 100000;
    const bw = w - ah;
    const bh = h - dh2;
    const bs = Math.min(bw, bh);
    const maxAdj4 = bs > 0 ? 100000 * bs / ss : 0;
    const adj4Raw = Math.max(0, Math.min(adjustments?.get('adj4') ?? 43750, maxAdj4));
    const bd = ss * adj4Raw / 100000;
    const bd2 = Math.max(bd - th, 0);
    const x3 = th + bd2;
    const x4 = w - ah;
    const y3 = dh2 + th;
    const y4 = y3 + dh2;
    const y5 = dh2 + bd;
    const y6 = y3 + bd2;
    const parts = [
        `M0,${h}`,
        `L0,${y5}`
    ];
    if (bd > 0.1) {
        parts.push(`A${bd},${bd} 0 0,1 ${bd},${dh2}`);
    } else {
        parts.push(`L0,${dh2}`);
    }
    parts.push(`L${x4},${dh2}`, `L${x4},0`, `L${w},${aw2}`, `L${x4},${y4}`, `L${x4},${y3}`, `L${x3},${y3}`);
    if (bd2 > 0.1) {
        parts.push(`A${bd2},${bd2} 0 0,0 ${th},${y6}`);
    } else {
        parts.push(`L${th},${y3}`);
    }
    parts.push(`L${th},${h}`, 'Z');
    return parts.join(' ');
});
presetShapes.set('bentUpArrow', (w, h, adjustments)=>{
    const raw1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, 50000));
    const raw2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, 50000));
    const raw3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, 50000));
    const ss = Math.min(w, h);
    const y1 = ss * raw3 / 100000;
    const dx1 = ss * raw2 / 50000;
    const x1 = w - dx1;
    const dx3 = ss * raw2 / 100000;
    const x3 = w - dx3;
    const dx2 = ss * raw1 / 200000;
    const x2 = x3 - dx2;
    const x4 = x3 + dx2;
    const dy2 = ss * raw1 / 100000;
    const y2 = h - dy2;
    return [
        `M0,${y2}`,
        `L${x2},${y2}`,
        `L${x2},${y1}`,
        `L${x1},${y1}`,
        `L${x3},0`,
        `L${w},${y1}`,
        `L${x4},${y1}`,
        `L${x4},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('curvedRightArrow', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 25000;
    const adj2Raw = adjustments?.get('adj2') ?? 50000;
    const adj3Raw = adjustments?.get('adj3') ?? 25000;
    const cnstVal1 = 50000;
    const cnstVal2 = 100000;
    const hd2 = h / 2;
    const r = w;
    const b = h;
    const l = 0;
    const c3d4 = 270;
    const cd2 = 180;
    const cd4 = 90;
    const ss = Math.max(Math.min(w, h), 1);
    const maxAdj2 = cnstVal1 * h / ss;
    const a2 = Math.max(0, Math.min(adj2Raw, maxAdj2));
    const a1 = Math.max(0, Math.min(adj1Raw, a2));
    const th = ss * a1 / cnstVal2;
    const aw = ss * a2 / cnstVal2;
    const q1 = (th + aw) / 4;
    const hR = hd2 - q1;
    const q7 = hR * 2;
    const q8 = q7 * q7;
    const q9 = th * th;
    const q10 = Math.max(q8 - q9, 0);
    const q11 = Math.sqrt(q10);
    const iDx = q11 * w / Math.max(q7, 1e-6);
    const maxAdj3 = cnstVal2 * iDx / ss;
    const a3 = Math.max(0, Math.min(adj3Raw, maxAdj3));
    const ah = ss * a3 / cnstVal2;
    const y3 = hR + th;
    const q2 = w * w;
    const q3 = ah * ah;
    const q4 = Math.max(q2 - q3, 0);
    const q5 = Math.sqrt(q4);
    const dy = q5 * hR / Math.max(w, 1e-6);
    const y5 = hR + dy;
    const y7 = y3 + dy;
    const q6 = aw - th;
    const dh = q6 / 2;
    const y4 = y5 - dh;
    const y8 = y7 + dh;
    const aw2 = aw / 2;
    const y6 = b - aw2;
    const x1 = r - ah;
    const swAng = Math.atan(dy / Math.max(ah, 1e-6));
    const stAng = Math.PI - swAng;
    const mswAng = -swAng;
    const q12 = th / 2;
    const dang2 = Math.atan2(q12, Math.max(iDx, 1e-6));
    const swAng2 = dang2 - Math.PI / 2;
    const stAngDg = stAng * 180 / Math.PI;
    const mswAngDg = mswAng * 180 / Math.PI;
    const swAngDg = swAng * 180 / Math.PI;
    const swAng2Dg = swAng2 * 180 / Math.PI;
    const arc = (cx, cy, rx, ry, startDeg, endDeg)=>{
        const s = startDeg * Math.PI / 180;
        const e = endDeg * Math.PI / 180;
        const xS = cx + rx * Math.cos(s);
        const yS = cy + ry * Math.sin(s);
        const xE = cx + rx * Math.cos(e);
        const yE = cy + ry * Math.sin(e);
        const delta = endDeg - startDeg;
        const largeArc = Math.abs(delta) > 180 ? 1 : 0;
        const sweep = delta >= 0 ? 1 : 0;
        return `M${xS},${yS} A${rx},${ry} 0 ${largeArc},${sweep} ${xE},${yE}`;
    };
    return [
        `M${l},${hR}`,
        arc(w, hR, w, hR, cd2, cd2 + mswAngDg).replace('M', 'L'),
        `L${x1},${y5}`,
        `L${x1},${y4}`,
        `L${r},${y6}`,
        `L${x1},${y8}`,
        `L${x1},${y7}`,
        arc(w, y3, w, hR, stAngDg, stAngDg + swAngDg).replace('M', 'L'),
        'Z',
        arc(w, hR, w, hR, cd2, cd2 + cd4),
        `L${r},${th}`,
        arc(w, y3, w, hR, c3d4, c3d4 + swAng2Dg).replace('M', 'L'),
        'Z'
    ].join(' ');
});
presetShapes.set('curvedLeftArrow', (w, h, adjustments)=>mirrorAbsolutePathHorizontally(presetShapes.get('curvedRightArrow')(w, h, adjustments), w));
function splitFirstClosedContour(path) {
    const closeIdx = path.indexOf('Z');
    if (closeIdx === -1) {
        return {
            outer: path,
            remainder: ''
        };
    }
    const outer = path.slice(0, closeIdx + 1).trim();
    const remainder = path.slice(closeIdx + 1).trim();
    return {
        outer,
        remainder
    };
}
function buildCurvedArrowMultiPath(shapeName, w, h, adjustments) {
    const fullPath = presetShapes.get(shapeName)(w, h, adjustments);
    const { outer, remainder } = splitFirstClosedContour(fullPath);
    if (!remainder) {
        return [
            {
                d: fullPath,
                fill: 'norm',
                stroke: true
            }
        ];
    }
    if (shapeName === 'curvedRightArrow') {
        return [
            {
                d: remainder,
                fill: 'norm',
                stroke: true
            },
            {
                d: outer,
                fill: 'norm',
                stroke: true
            }
        ];
    }
    return [
        {
            d: outer,
            fill: 'norm',
            stroke: true
        },
        {
            d: remainder,
            fill: 'norm',
            stroke: true
        }
    ];
}
function buildCurvedVerticalArrowMultiPath(shapeName, w, h, adjustments) {
    const downFullPath = presetShapes.get('curvedDownArrow')(w, h, adjustments);
    const { outer, remainder } = splitFirstClosedContour(downFullPath);
    const ordered = remainder ? [
        {
            d: remainder,
            fill: 'norm',
            stroke: true
        },
        {
            d: outer,
            fill: 'norm',
            stroke: true
        }
    ] : [
        {
            d: downFullPath,
            fill: 'norm',
            stroke: true
        }
    ];
    if (shapeName === 'curvedDownArrow') {
        return ordered;
    }
    const mirrored = ordered.map((path)=>({
            ...path,
            d: mirrorAbsolutePathVertically(path.d, h)
        }));
    return mirrored.reverse();
}
presetShapes.set('curvedUpArrow', (w, h, adjustments)=>{
    const arc = (cx, cy, rx, ry, startDeg, endDeg)=>{
        const s = startDeg * Math.PI / 180;
        const e = endDeg * Math.PI / 180;
        const xS = cx + rx * Math.cos(s);
        const yS = cy + ry * Math.sin(s);
        const xE = cx + rx * Math.cos(e);
        const yE = cy + ry * Math.sin(e);
        const delta = endDeg - startDeg;
        const largeArc = Math.abs(delta) > 180 ? 1 : 0;
        const sweep = delta >= 0 ? 1 : 0;
        return `M${xS},${yS} A${rx},${ry} 0 ${largeArc},${sweep} ${xE},${yE}`;
    };
    const ss = Math.min(w, h);
    const wd2 = w / 2;
    const a1Raw = adjustments?.get('adj1') ?? 25000;
    const a2Raw = adjustments?.get('adj2') ?? 50000;
    const a3Raw = adjustments?.get('adj3') ?? 25000;
    const maxAdj2 = 50000 * w / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(a2Raw, maxAdj2));
    const a1 = Math.max(0, Math.min(a1Raw, 100000));
    const th = ss * a1 / 100000;
    const aw = ss * a2 / 100000;
    const q1 = (th + aw) / 4;
    const wR = wd2 - q1;
    const q7 = wR * 2;
    const idy = Math.sqrt(Math.max(q7 * q7 - th * th, 0)) * h / Math.max(q7, 1);
    const maxAdj3 = 100000 * idy / Math.max(ss, 1);
    const a3 = Math.max(0, Math.min(a3Raw, maxAdj3));
    const ah = ss * a3 / 100000;
    const x3 = wR + th;
    const dx = Math.sqrt(Math.max(h * h - ah * ah, 0)) * wR / Math.max(h, 1);
    const x5 = wR + dx;
    const x7 = x3 + dx;
    const dh = (aw - th) / 2;
    const x4 = x5 - dh;
    const x8 = x7 + dh;
    const x6 = w - aw / 2;
    const y1 = ah;
    const swAng = Math.atan2(dx, ah);
    const dang2 = Math.atan2(th / 2, idy);
    const stAng2 = Math.PI / 2 - dang2;
    const swAng2 = dang2 - swAng;
    const stAng3 = Math.PI / 2 - swAng;
    const stAng2Deg = stAng2 * 180 / Math.PI;
    const swAng2Deg = swAng2 * 180 / Math.PI;
    const stAng3Deg = stAng3 * 180 / Math.PI;
    const swAngDeg = swAng * 180 / Math.PI;
    return [
        arc(wR, 0, wR, h, stAng2Deg, stAng2Deg + swAng2Deg),
        `L${x5},${y1}`,
        `L${x4},${y1}`,
        `L${x6},0`,
        `L${x8},${y1}`,
        `L${x7},${y1}`,
        arc(x3, 0, wR, h, stAng3Deg, stAng3Deg + swAngDeg).replace('M', 'L'),
        `L${wR},${h}`,
        arc(wR, 0, wR, h, 90, 180).replace('M', 'L'),
        `L${th},0`,
        arc(x3, 0, wR, h, 180, 90).replace('M', 'L'),
        'Z'
    ].join(' ');
});
presetShapes.set('curvedDownArrow', (w, h, adjustments)=>{
    const arc = (cx, cy, rx, ry, startDeg, endDeg)=>{
        const s = startDeg * Math.PI / 180;
        const e = endDeg * Math.PI / 180;
        const xS = cx + rx * Math.cos(s);
        const yS = cy + ry * Math.sin(s);
        const xE = cx + rx * Math.cos(e);
        const yE = cy + ry * Math.sin(e);
        const delta = endDeg - startDeg;
        const largeArc = Math.abs(delta) > 180 ? 1 : 0;
        const sweep = delta >= 0 ? 1 : 0;
        return `M${xS},${yS} A${rx},${ry} 0 ${largeArc},${sweep} ${xE},${yE}`;
    };
    const ss = Math.min(w, h);
    const wd2 = w / 2;
    const a1Raw = adjustments?.get('adj1') ?? 25000;
    const a2Raw = adjustments?.get('adj2') ?? 50000;
    const a3Raw = adjustments?.get('adj3') ?? 25000;
    const maxAdj2 = 50000 * w / Math.max(ss, 1);
    const a2 = Math.max(0, Math.min(a2Raw, maxAdj2));
    const a1 = Math.max(0, Math.min(a1Raw, 100000));
    const th = ss * a1 / 100000;
    const aw = ss * a2 / 100000;
    const q1 = (th + aw) / 4;
    const wR = wd2 - q1;
    const q7 = wR * 2;
    const idy = Math.sqrt(Math.max(q7 * q7 - th * th, 0)) * h / Math.max(q7, 1);
    const maxAdj3 = 100000 * idy / Math.max(ss, 1);
    const a3 = Math.max(0, Math.min(a3Raw, maxAdj3));
    const ah = ss * a3 / 100000;
    const x3 = wR + th;
    const dx = Math.sqrt(Math.max(h * h - ah * ah, 0)) * wR / Math.max(h, 1);
    const x5 = wR + dx;
    const x7 = x3 + dx;
    const dh = (aw - th) / 2;
    const x4 = x5 - dh;
    const x8 = x7 + dh;
    const x6 = w - aw / 2;
    const y1 = h - ah;
    const swAng = Math.atan2(dx, ah);
    const swAngDeg = swAng * 180 / Math.PI;
    const dang2 = Math.atan2(th / 2, idy);
    const dang2Deg = dang2 * 180 / Math.PI;
    const stAng = 270 + swAngDeg;
    const stAng2 = 270 - dang2Deg;
    const swAng2 = dang2Deg - 90;
    const swAng3 = 90 + dang2Deg;
    return [
        `M${x6},${h}`,
        `L${x4},${y1}`,
        `L${x5},${y1}`,
        arc(wR, h, wR, h, stAng, stAng - swAngDeg).replace('M', 'L'),
        `L${x3},0`,
        arc(x3, h, wR, h, 270, 270 + swAngDeg).replace('M', 'L'),
        `L${x5 + th},${y1}`,
        `L${x8},${y1}`,
        'Z',
        `M${x3},0`,
        arc(x3, h, wR, h, stAng2, stAng2 + swAng2).replace('M', 'L'),
        arc(wR, h, wR, h, 180, 180 + swAng3).replace('M', 'L'),
        'Z'
    ].join(' ');
});
function buildCircularArrowPath(w, h, adjustments, _mirrorX = false, variant = 'circularArrow') {
    const hc = w / 2;
    const vc = h / 2;
    const wd2 = w / 2;
    const hd2 = h / 2;
    const ss = Math.min(w, h);
    const cd2 = 10800000;
    const toRad60k = (a)=>a / 60000 * Math.PI / 180;
    const ooxSin = (val, ang)=>val * Math.sin(toRad60k(ang));
    const ooxCos = (val, ang)=>val * Math.cos(toRad60k(ang));
    const cat2 = (r, ht, wt)=>r * Math.cos(Math.atan2(wt, ht));
    const sat2 = (r, ht, wt)=>r * Math.sin(Math.atan2(wt, ht));
    const at2 = (x, y)=>Math.atan2(y, x) * 180 / Math.PI * 60000;
    const modF = (x, y, z)=>Math.sqrt(x * x + y * y + z * z);
    const isLeft = variant === 'leftCircularArrow';
    const adj1 = adjustments?.get('adj1') ?? 12500;
    const adj2 = adjustments?.get('adj2') ?? (isLeft ? -1142319 : 1142319);
    const adj3 = adjustments?.get('adj3') ?? (isLeft ? 1142319 : 20457681);
    const adj4 = adjustments?.get('adj4') ?? 10800000;
    const adj5v = adjustments?.get('adj5') ?? 12500;
    const a5 = Math.max(0, Math.min(adj5v, 25000));
    const maxAdj1 = a5 * 2;
    const a1 = Math.max(0, Math.min(adj1, maxAdj1));
    const enAng = Math.max(1, Math.min(adj3, 21599999));
    const stAng = Math.max(0, Math.min(adj4, 21599999));
    const th = ss * a1 / 100000;
    const thh = ss * a5 / 100000;
    const th2 = th / 2;
    const rw1 = wd2 + th2 - thh;
    const rh1 = hd2 + th2 - thh;
    const rw2 = rw1 - th;
    const rh2 = rh1 - th;
    const rw3 = rw2 + th2;
    const rh3 = rh2 + th2;
    const wtH = ooxSin(rw3, enAng);
    const htH = ooxCos(rh3, enAng);
    const dxH = cat2(rw3, htH, wtH);
    const dyH = sat2(rh3, htH, wtH);
    const xH = hc + dxH;
    const yH = vc + dyH;
    const rI = Math.min(rw2, rh2);
    const u1 = dxH * dxH;
    const u2 = dyH * dyH;
    const u3 = rI * rI;
    const u4 = u1 - u3;
    const u5 = u2 - u3;
    const u6 = u2 !== 0 ? u4 * u5 / u1 : 0;
    const u7 = u2 !== 0 ? u6 / u2 : 0;
    const u8 = 1 - u7;
    const u9 = Math.sqrt(Math.max(0, u8));
    const u10 = dxH !== 0 ? u4 / dxH : 0;
    const u11 = dyH !== 0 ? u10 / dyH : 0;
    const u12 = u11 !== 0 ? (1 + u9) / u11 : 0;
    const u13 = at2(1, u12);
    const u14 = u13 + 21600000;
    const u15 = u13 >= 0 ? u13 : u14;
    const u16 = u15 - enAng;
    const u17 = u16 + 21600000;
    const u18 = u16 >= 0 ? u16 : u17;
    const u19 = u18 - cd2;
    const u20 = u18 - 21600000;
    const u21 = u19 >= 0 ? u20 : u18;
    const maxAng = Math.abs(u21);
    let aAng;
    if (isLeft) {
        const minAng = -maxAng;
        const a2 = -Math.abs(adj2);
        aAng = Math.max(minAng, Math.min(a2, 0));
    } else {
        aAng = Math.max(0, Math.min(adj2, maxAng));
    }
    const ptAng = enAng + aAng;
    const wtA = ooxSin(rw3, ptAng);
    const htA = ooxCos(rh3, ptAng);
    const dxA = cat2(rw3, htA, wtA);
    const dyA = sat2(rh3, htA, wtA);
    const xA = hc + dxA;
    const yA = vc + dyA;
    const wtE = ooxSin(rw1, stAng);
    const htE = ooxCos(rh1, stAng);
    const dxE = cat2(rw1, htE, wtE);
    const dyE = sat2(rh1, htE, wtE);
    const xE = hc + dxE;
    const yE = vc + dyE;
    const dxG = ooxCos(thh, ptAng);
    const dyG = ooxSin(thh, ptAng);
    const xG = xH + dxG;
    const yG = yH + dyG;
    const xB = xH - dxG;
    const yB = yH - dyG;
    const sx1 = xB - hc;
    const sy1 = yB - vc;
    const sx2 = xG - hc;
    const sy2 = yG - vc;
    const rO = Math.min(rw1, rh1);
    const x1O = rw1 !== 0 ? sx1 * rO / rw1 : 0;
    const y1O = rh1 !== 0 ? sy1 * rO / rh1 : 0;
    const x2O = rw1 !== 0 ? sx2 * rO / rw1 : 0;
    const y2O = rh1 !== 0 ? sy2 * rO / rh1 : 0;
    const dxO = x2O - x1O;
    const dyO = y2O - y1O;
    const dOval = modF(dxO, dyO, 0);
    const q1 = x1O * y2O;
    const q2 = x2O * y1O;
    const DO = q1 - q2;
    const q3 = rO * rO;
    const q4 = dOval * dOval;
    const q5 = q3 * q4;
    const q6 = DO * DO;
    const q7 = q5 - q6;
    const q8 = Math.max(q7, 0);
    const sdelO = Math.sqrt(q8);
    const ndyO = dyO * -1;
    const sdyO = ndyO >= 0 ? -1 : 1;
    const q9 = sdyO * dxO;
    const q10 = q9 * sdelO;
    const q11 = DO * dyO;
    const dxF1 = q4 !== 0 ? (q11 + q10) / q4 : 0;
    const q12 = q11 - q10;
    const dxF2 = q4 !== 0 ? q12 / q4 : 0;
    const adyO = Math.abs(dyO);
    const q13 = adyO * sdelO;
    const q14 = DO * dxO * -1;
    const dyF1 = q4 !== 0 ? (q14 + q13) / q4 : 0;
    const q15 = q14 - q13;
    const dyF2 = q4 !== 0 ? q15 / q4 : 0;
    const q16 = x2O - dxF1;
    const q17 = x2O - dxF2;
    const q18 = y2O - dyF1;
    const q19 = y2O - dyF2;
    const q20 = modF(q16, q18, 0);
    const q21 = modF(q17, q19, 0);
    const q22 = q21 - q20;
    const dxF = q22 >= 0 ? dxF1 : dxF2;
    const dyF = q22 >= 0 ? dyF1 : dyF2;
    const sdxF = rO !== 0 ? dxF * rw1 / rO : 0;
    const sdyF = rO !== 0 ? dyF * rh1 / rO : 0;
    const xF = hc + sdxF;
    const yF = vc + sdyF;
    const x1I = rw2 !== 0 ? sx1 * rI / rw2 : 0;
    const y1I = rh2 !== 0 ? sy1 * rI / rh2 : 0;
    const x2I = rw2 !== 0 ? sx2 * rI / rw2 : 0;
    const y2I = rh2 !== 0 ? sy2 * rI / rh2 : 0;
    const dxI = x2I - x1I;
    const dyI = y2I - y1I;
    const dI = modF(dxI, dyI, 0);
    const v1 = x1I * y2I;
    const v2 = x2I * y1I;
    const DI = v1 - v2;
    const v3 = rI * rI;
    const v4 = dI * dI;
    const v5 = v3 * v4;
    const v6 = DI * DI;
    const v7 = v5 - v6;
    const v8 = Math.max(v7, 0);
    const sdelI = Math.sqrt(v8);
    const v9 = sdyO * dxI;
    const v10 = v9 * sdelI;
    const v11 = DI * dyI;
    const dxC1 = v4 !== 0 ? (v11 + v10) / v4 : 0;
    const v12 = v11 - v10;
    const dxC2 = v4 !== 0 ? v12 / v4 : 0;
    const adyI = Math.abs(dyI);
    const v13 = adyI * sdelI;
    const v14 = DI * dxI * -1;
    const dyC1 = v4 !== 0 ? (v14 + v13) / v4 : 0;
    const v15 = v14 - v13;
    const dyC2 = v4 !== 0 ? v15 / v4 : 0;
    const v16 = x1I - dxC1;
    const v17 = x1I - dxC2;
    const v18 = y1I - dyC1;
    const v19 = y1I - dyC2;
    const v20 = modF(v16, v18, 0);
    const v21 = modF(v17, v19, 0);
    const v22 = v21 - v20;
    const dxC = v22 >= 0 ? dxC1 : dxC2;
    const dyC = v22 >= 0 ? dyC1 : dyC2;
    const sdxC = rI !== 0 ? dxC * rw2 / rI : 0;
    const sdyC = rI !== 0 ? dyC * rh2 / rI : 0;
    const xC = hc + sdxC;
    const yC = vc + sdyC;
    const ist0 = at2(sdxC, sdyC);
    const ist1 = ist0 + 21600000;
    const istAng0 = ist0 >= 0 ? ist0 : ist1;
    const isw1 = stAng - istAng0;
    let istAng;
    let iswAng;
    if (isLeft) {
        const iswAng0 = isw1 >= 0 ? isw1 : isw1 + 21600000;
        istAng = istAng0 + iswAng0;
        iswAng = -iswAng0;
    } else {
        istAng = istAng0;
        iswAng = isw1 >= 0 ? isw1 - 21600000 : isw1;
    }
    const p1 = xF - xC;
    const p2 = yF - yC;
    const p3 = modF(p1, p2, 0);
    const p4 = p3 / 2;
    const p5 = p4 - thh;
    const xGp = p5 >= 0 ? xF : xG;
    const yGp = p5 >= 0 ? yF : yG;
    const xBp = p5 >= 0 ? xC : xB;
    const yBp = p5 >= 0 ? yC : yB;
    const en0 = at2(sdxF, sdyF);
    const en1 = en0 + 21600000;
    const en2 = en0 >= 0 ? en0 : en1;
    const sw0 = en2 - stAng;
    let outerArcStAng;
    let outerArcSwAng;
    if (isLeft) {
        const swAngRaw = sw0 >= 0 ? sw0 - 21600000 : sw0;
        outerArcStAng = stAng + swAngRaw;
        outerArcSwAng = -swAngRaw;
    } else {
        const swAng = sw0 >= 0 ? sw0 : sw0 + 21600000;
        outerArcStAng = stAng;
        outerArcSwAng = swAng;
    }
    const outerEndAng = outerArcStAng + outerArcSwAng;
    const wtOE = ooxSin(rw1, outerEndAng);
    const htOE = ooxCos(rh1, outerEndAng);
    const xOE = hc + cat2(rw1, htOE, wtOE);
    const yOE = vc + sat2(rh1, htOE, wtOE);
    const innerEndAng = istAng + iswAng;
    const wtIE = ooxSin(rw2, innerEndAng);
    const htIE = ooxCos(rh2, innerEndAng);
    const xIE = hc + cat2(rw2, htIE, wtIE);
    const yIE = vc + sat2(rh2, htIE, wtIE);
    const outerSweepDeg = Math.abs(outerArcSwAng / 60000);
    const outerLargeArc = outerSweepDeg > 180 ? 1 : 0;
    const outerSweepFlag = outerArcSwAng > 0 ? 1 : 0;
    const innerSweepDeg = Math.abs(iswAng / 60000);
    const innerLargeArc = innerSweepDeg > 180 ? 1 : 0;
    const innerSweepFlag = iswAng > 0 ? 1 : 0;
    if (isLeft) {
        const wtD = ooxSin(rw2, stAng);
        const htD = ooxCos(rh2, stAng);
        const xD = hc + cat2(rw2, htD, wtD);
        const yD = vc + sat2(rh2, htD, wtD);
        return [
            `M${xE},${yE}`,
            `L${xD},${yD}`,
            `A${rw2},${rh2} 0 ${innerLargeArc},${innerSweepFlag} ${xIE},${yIE}`,
            `L${xBp},${yBp}`,
            `L${xA},${yA}`,
            `L${xGp},${yGp}`,
            `L${xF},${yF}`,
            `A${rw1},${rh1} 0 ${outerLargeArc},${outerSweepFlag} ${xOE},${yOE}`,
            'Z'
        ].join(' ');
    }
    return [
        `M${xE},${yE}`,
        `A${rw1},${rh1} 0 ${outerLargeArc},${outerSweepFlag} ${xOE},${yOE}`,
        `L${xGp},${yGp}`,
        `L${xA},${yA}`,
        `L${xBp},${yBp}`,
        `L${xC},${yC}`,
        `A${rw2},${rh2} 0 ${innerLargeArc},${innerSweepFlag} ${xIE},${yIE}`,
        'Z'
    ].join(' ');
}
presetShapes.set('circularArrow', (w, h, adjustments)=>{
    return buildCircularArrowPath(w, h, adjustments, false, 'circularArrow');
});
presetShapes.set('leftCircularArrow', (w, h, adjustments)=>{
    return buildCircularArrowPath(w, h, adjustments, false, 'leftCircularArrow');
});
presetShapes.set('leftRightCircularArrow', (w, h, _adjustments)=>{
    const sx = w / 400;
    const sy = h / 280;
    const p = (x, y)=>({
            x: x * sx,
            y: y * sy
        });
    const p1 = p(35.0, 140.0);
    const p2 = p(19.9536, 89.9471);
    const p3 = p(33.4296, 89.9471);
    const c1 = p(74.6127, 28.1974);
    const c2 = p(182.5744, 0.5489);
    const p4 = p(274.5688, 28.1924);
    const c3 = p(315.4978, 40.4912);
    const c4 = p(348.2481, 62.4743);
    const p5 = p(366.5707, 89.9471);
    const p6 = p(380.0463, 89.9471);
    const p7 = p(365.0, 140.0);
    const p8 = p(310.0463, 89.9471);
    const p9 = p(320.9838, 89.9471);
    const c5 = p(274.3848, 50.3095);
    const c6 = p(182.4425, 40.5864);
    const p10 = p(115.6249, 68.2298);
    const c7 = p(101.3589, 74.1319);
    const c8 = p(88.9651, 81.4842);
    const p11 = p(79.0159, 89.947);
    const p12 = p(89.9536, 89.9471);
    return [
        `M${p1.x},${p1.y}`,
        `L${p2.x},${p2.y}`,
        `L${p3.x},${p3.y}`,
        `C${c1.x},${c1.y} ${c2.x},${c2.y} ${p4.x},${p4.y}`,
        `C${c3.x},${c3.y} ${c4.x},${c4.y} ${p5.x},${p5.y}`,
        `L${p6.x},${p6.y}`,
        `L${p7.x},${p7.y}`,
        `L${p8.x},${p8.y}`,
        `L${p9.x},${p9.y}`,
        `C${c5.x},${c5.y} ${c6.x},${c6.y} ${p10.x},${p10.y}`,
        `C${c7.x},${c7.y} ${c8.x},${c8.y} ${p11.x},${p11.y}`,
        `L${p12.x},${p12.y}`,
        'Z'
    ].join(' ');
});
presetShapes.set('quadArrow', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 22500;
    const adj2Raw = adjustments?.get('adj2') ?? 22500;
    const adj3Raw = adjustments?.get('adj3') ?? 22500;
    const vc = h / 2;
    const hc = w / 2;
    const minWH = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2Raw, 50000));
    const a1 = Math.max(0, Math.min(adj1Raw, 2 * a2));
    const a3 = Math.max(0, Math.min(adj3Raw, (100000 - 2 * a2) / 2));
    const x1 = minWH * a3 / 100000;
    const dx2 = minWH * a2 / 100000;
    const x2 = hc - dx2;
    const x5 = hc + dx2;
    const dx3 = minWH * a1 / 200000;
    const x3 = hc - dx3;
    const x4 = hc + dx3;
    const x6 = w - x1;
    const y2 = vc - dx2;
    const y5 = vc + dx2;
    const y3 = vc - dx3;
    const y4 = vc + dx3;
    const y6 = h - x1;
    return [
        `M0,${vc}`,
        `L${x1},${y2}`,
        `L${x1},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${x1}`,
        `L${x2},${x1}`,
        `L${hc},0`,
        `L${x5},${x1}`,
        `L${x4},${x1}`,
        `L${x4},${y3}`,
        `L${x6},${y3}`,
        `L${x6},${y2}`,
        `L${w},${vc}`,
        `L${x6},${y5}`,
        `L${x6},${y4}`,
        `L${x4},${y4}`,
        `L${x4},${y6}`,
        `L${x5},${y6}`,
        `L${hc},${h}`,
        `L${x2},${y6}`,
        `L${x3},${y6}`,
        `L${x3},${y4}`,
        `L${x1},${y4}`,
        `L${x1},${y5}`,
        'Z'
    ].join(' ');
});
presetShapes.set('quadArrowCallout', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const hc = w / 2;
    const vc = h / 2;
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 18515, 50000));
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 18515, a2 * 2));
    const maxAdj3 = 50000 - a2;
    const a3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 18515, maxAdj3));
    const q2 = a3 * 2;
    const a4 = Math.max(a1, Math.min(adjustments?.get('adj4') ?? 48123, 100000 - q2));
    const dx2 = ss * a2 / 100000;
    const dx3 = ss * a1 / 200000;
    const ah = ss * a3 / 100000;
    const dx1 = w * a4 / 200000;
    const dy1 = h * a4 / 200000;
    const x8 = w - ah;
    const x2 = hc - dx1;
    const x7 = hc + dx1;
    const x3 = hc - dx2;
    const x6 = hc + dx2;
    const x4 = hc - dx3;
    const x5 = hc + dx3;
    const y8 = h - ah;
    const y2 = vc - dy1;
    const y7 = vc + dy1;
    const y3 = vc - dx2;
    const y6 = vc + dx2;
    const y4 = vc - dx3;
    const y5 = vc + dx3;
    return [
        `M0,${vc}`,
        `L${ah},${y3}`,
        `L${ah},${y4}`,
        `L${x2},${y4}`,
        `L${x2},${y2}`,
        `L${x4},${y2}`,
        `L${x4},${ah}`,
        `L${x3},${ah}`,
        `L${hc},0`,
        `L${x6},${ah}`,
        `L${x5},${ah}`,
        `L${x5},${y2}`,
        `L${x7},${y2}`,
        `L${x7},${y4}`,
        `L${x8},${y4}`,
        `L${x8},${y3}`,
        `L${w},${vc}`,
        `L${x8},${y6}`,
        `L${x8},${y5}`,
        `L${x7},${y5}`,
        `L${x7},${y7}`,
        `L${x5},${y7}`,
        `L${x5},${y8}`,
        `L${x6},${y8}`,
        `L${hc},${h}`,
        `L${x3},${y8}`,
        `L${x4},${y8}`,
        `L${x4},${y7}`,
        `L${x2},${y7}`,
        `L${x2},${y5}`,
        `L${ah},${y5}`,
        `L${ah},${y6}`,
        'Z'
    ].join(' ');
});
presetShapes.set('leftRightUpArrow', (w, h, adjustments)=>{
    const rawAdj2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 25000, 50000));
    const maxAdj1 = rawAdj2 * 2;
    const rawAdj1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 25000, maxAdj1));
    const q1 = 100000 - maxAdj1;
    const maxAdj3 = q1 / 2;
    const rawAdj3 = Math.max(0, Math.min(adjustments?.get('adj3') ?? 25000, maxAdj3));
    const ss = Math.min(w, h);
    const hc = w / 2;
    const x1 = ss * rawAdj3 / 100000;
    const dx2 = ss * rawAdj2 / 100000;
    const x2 = hc - dx2;
    const x5 = hc + dx2;
    const dx3 = ss * rawAdj1 / 200000;
    const x3 = hc - dx3;
    const x4 = hc + dx3;
    const x6 = w - x1;
    const dy2 = ss * rawAdj2 / 50000;
    const y2 = h - dy2;
    const y4 = h - dx2;
    const y3 = y4 - dx3;
    const y5 = y4 + dx3;
    return [
        `M0,${y4}`,
        `L${x1},${y2}`,
        `L${x1},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${x1}`,
        `L${x2},${x1}`,
        `L${hc},0`,
        `L${x5},${x1}`,
        `L${x4},${x1}`,
        `L${x4},${y3}`,
        `L${x6},${y3}`,
        `L${x6},${y2}`,
        `L${w},${y4}`,
        `L${x6},${h}`,
        `L${x6},${y5}`,
        `L${x1},${y5}`,
        `L${x1},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('swooshArrow', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const raw1 = adjustments?.get('adj1') ?? 25000;
    const raw2 = adjustments?.get('adj2') ?? 16667;
    const a1 = Math.max(1, Math.min(raw1, 75000));
    const maxAdj2 = 70000 * w / ss;
    const a2 = Math.max(0, Math.min(raw2, maxAdj2));
    const ad1 = h * a1 / 100000;
    const ad2 = ss * a2 / 100000;
    const ssd8 = ss / 8;
    const hd6 = h / 6;
    const alfa = Math.PI / 2 / 14;
    const tanAlfa = Math.tan(alfa);
    const xB = w - ad2;
    const yB = ssd8;
    const dx0 = ssd8 * tanAlfa;
    const xC = xB - dx0;
    const dx1 = ad1 * tanAlfa;
    const yF = yB + ad1;
    const xF = xB + dx1;
    const xE = xF + dx0;
    const yE = yF + ssd8;
    const dy2 = yE;
    const dy22 = dy2 / 2;
    const dy3 = h / 20;
    const yD = dy22 + dy3;
    const xP1 = w / 6;
    const yP1 = hd6 + hd6;
    const dy5 = hd6 / 2;
    const yP2 = yF + dy5;
    const xP2 = w / 4;
    return [
        `M0,${h}`,
        `Q${xP1},${yP1} ${xB},${yB}`,
        `L${xC},0`,
        `L${w},${yD}`,
        `L${xE},${yE}`,
        `L${xF},${yF}`,
        `Q${xP2},${yP2} 0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartProcess', (w, h)=>`M0,0 L${w},0 L${w},${h} L0,${h} Z`);
presetShapes.set('flowChartDecision', (w, h)=>{
    const cx = w / 2;
    const cy = h / 2;
    return `M${cx},0 L${w},${cy} L${cx},${h} L0,${cy} Z`;
});
presetShapes.set('flowChartTerminator', (w, h)=>{
    const x1 = w * 3475 / 21600;
    const x2 = w * 18125 / 21600;
    const wR = x1;
    const hR = h / 2;
    return [
        `M${x1},0`,
        `L${x2},0`,
        `A${wR},${hR} 0 0,1 ${x2},${h}`,
        `L${x1},${h}`,
        `A${wR},${hR} 0 0,1 ${x1},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartDocument', (w, h)=>{
    const y1 = h * 17322 / 21600;
    const cy1 = y1;
    const cy2 = h * 23922 / 21600;
    const y2 = h * 20172 / 21600;
    return [
        `M0,0`,
        `L${w},0`,
        `L${w},${y1}`,
        `C${w / 2},${cy1} ${w / 2},${cy2} 0,${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartInputOutput', (w, h)=>{
    const offset = w / 5;
    return `M${offset},0 L${w},0 L${w - offset},${h} L0,${h} Z`;
});
presetShapes.set('flowChartPredefinedProcess', (w, h)=>{
    const inset = w / 8;
    return [
        `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
        `M${inset},0 L${inset},${h}`,
        `M${w - inset},0 L${w - inset},${h}`
    ].join(' ');
});
presetShapes.set('flowChartAlternateProcess', (w, h)=>{
    const r = Math.min(w, h) / 6;
    return [
        `M${r},0`,
        `L${w - r},0`,
        `A${r},${r} 0 0,1 ${w},${r}`,
        `L${w},${h - r}`,
        `A${r},${r} 0 0,1 ${w - r},${h}`,
        `L${r},${h}`,
        `A${r},${r} 0 0,1 0,${h - r}`,
        `L0,${r}`,
        `A${r},${r} 0 0,1 ${r},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartManualInput', (w, h)=>{
    const topOffset = h * 0.2;
    return `M0,${topOffset} L${w},0 L${w},${h} L0,${h} Z`;
});
presetShapes.set('flowChartManualOperation', (w, h)=>{
    return `M0,0 L${w},0 L${w * 4 / 5},${h} L${w / 5},${h} Z`;
});
presetShapes.set('flowChartPreparation', (w, h)=>{
    const inset = w * 0.2;
    const cy = h / 2;
    return `M${inset},0 L${w - inset},0 L${w},${cy} L${w - inset},${h} L${inset},${h} L0,${cy} Z`;
});
presetShapes.set('flowChartData', (w, h)=>{
    const offset = w * 0.15;
    return `M${offset},0 L${w},0 L${w - offset},${h} L0,${h} Z`;
});
presetShapes.set('flowChartInternalStorage', (w, h)=>{
    const xInset = w / 8;
    const yInset = h / 8;
    return [
        `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
        `M${xInset},0 L${xInset},${h}`,
        `M0,${yInset} L${w},${yInset}`
    ].join(' ');
});
presetShapes.set('flowChartMagneticDisk', (w, h)=>{
    const ry = h / 6;
    const bodyTop = ry;
    const bodyBottom = h - ry;
    return [
        `M0,${bodyTop}`,
        `A${w / 2},${ry} 0 1,1 ${w},${bodyTop}`,
        `L${w},${bodyBottom}`,
        `A${w / 2},${ry} 0 1,1 0,${bodyBottom}`,
        `L0,${bodyTop}`,
        'Z',
        `M${w},${bodyTop}`,
        `A${w / 2},${ry} 0 1,1 0,${bodyTop}`
    ].join(' ');
});
presetShapes.set('flowChartDelay', (w, h)=>{
    const hc = w / 2;
    const a = ooArcTo(hc, 0, hc, h / 2, 270, 180);
    return [
        `M0,0`,
        `L${hc},0`,
        a.svg,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartDisplay', (w, h)=>{
    const sx = w / 6;
    const sy = h / 6;
    const arcWR = sx;
    const arcHR = sy * 3;
    const a = ooArcTo(5 * sx, 0, arcWR, arcHR, 270, 180);
    return [
        `M0,${3 * sy}`,
        `L${sx},0`,
        `L${5 * sx},0`,
        a.svg,
        `L${sx},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartExtract', (w, h)=>`M${w / 2},0 L${w},${h} L0,${h} Z`);
presetShapes.set('flowChartMerge', (w, h)=>`M0,0 L${w},0 L${w / 2},${h} Z`);
presetShapes.set('flowChartOffpageConnector', (w, h)=>{
    const arrowH = h * 0.2;
    return [
        `M0,0`,
        `L${w},0`,
        `L${w},${h - arrowH}`,
        `L${w / 2},${h}`,
        `L0,${h - arrowH}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartConnector', (w, h)=>{
    const rx = w / 2;
    const ry = h / 2;
    return [
        `M${w},${ry}`,
        `A${rx},${ry} 0 1,1 0,${ry}`,
        `A${rx},${ry} 0 1,1 ${w},${ry}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartSort', (w, h)=>{
    const cx = w / 2;
    const cy = h / 2;
    return [
        `M${cx},0 L${w},${cy} L${cx},${h} L0,${cy} Z`,
        `M0,${cy} L${w},${cy}`
    ].join(' ');
});
presetShapes.set('flowChartCollate', (w, h)=>{
    const cx = w / 2;
    const cy = h / 2;
    return [
        `M0,0 L${w},0 L${cx},${cy} Z`,
        `M0,${h} L${w},${h} L${cx},${cy} Z`
    ].join(' ');
});
presetShapes.set('flowChartPunchedTape', (w, h)=>{
    const sx = w / 20;
    const sy = h / 20;
    const arcTo = (curX, curY, wR, hR, stAng60k, swAng60k)=>{
        const stDeg = stAng60k / 60000;
        const swDeg = swAng60k / 60000;
        const stRad = stDeg * Math.PI / 180;
        const endRad = (stDeg + swDeg) * Math.PI / 180;
        const cx = curX - wR * Math.cos(stRad);
        const cy = curY - hR * Math.sin(stRad);
        const endX = cx + wR * Math.cos(endRad);
        const endY = cy + hR * Math.sin(endRad);
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        return {
            endX,
            endY,
            svg: `A${wR},${hR} 0 ${largeArc},${sweep} ${endX},${endY}`
        };
    };
    const wR = 5 * sx;
    const hR = 2 * sy;
    let x = 0, y = 2 * sy;
    const parts = [
        `M${x},${y}`
    ];
    let a = arcTo(x, y, wR, hR, 10800000, -10800000);
    parts.push(a.svg);
    x = a.endX;
    y = a.endY;
    a = arcTo(x, y, wR, hR, 10800000, 10800000);
    parts.push(a.svg);
    x = a.endX;
    y = a.endY;
    const bx = 20 * sx, by = 18 * sy;
    parts.push(`L${bx},${by}`);
    x = bx;
    y = by;
    a = arcTo(x, y, wR, hR, 0, -10800000);
    parts.push(a.svg);
    x = a.endX;
    y = a.endY;
    a = arcTo(x, y, wR, hR, 0, 10800000);
    parts.push(a.svg);
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('flowChartPunchedCard', (w, h)=>{
    const sx = w / 5;
    const sy = h / 5;
    return `M0,${sy} L${sx},0 L${w},0 L${w},${h} L0,${h} Z`;
});
presetShapes.set('flowChartSummingJunction', (w, h)=>{
    const wd2 = w / 2;
    const hd2 = h / 2;
    const idx = wd2 * Math.cos(Math.PI / 4);
    const idy = hd2 * Math.sin(Math.PI / 4);
    const il = wd2 - idx;
    const ir = wd2 + idx;
    const it = hd2 - idy;
    const ib = hd2 + idy;
    return [
        `M0,${hd2}`,
        `A${wd2},${hd2} 0 1,1 ${w},${hd2}`,
        `A${wd2},${hd2} 0 1,1 0,${hd2}`,
        'Z',
        `M${il},${it} L${ir},${ib}`,
        `M${ir},${it} L${il},${ib}`
    ].join(' ');
});
presetShapes.set('flowChartOr', (w, h)=>{
    const wd2 = w / 2;
    const hd2 = h / 2;
    return [
        `M0,${hd2}`,
        `A${wd2},${hd2} 0 1,1 ${w},${hd2}`,
        `A${wd2},${hd2} 0 1,1 0,${hd2}`,
        'Z',
        `M${wd2},0 L${wd2},${h}`,
        `M0,${hd2} L${w},${hd2}`
    ].join(' ');
});
presetShapes.set('flowChartOnlineStorage', (w, h)=>{
    const x1 = w / 6;
    return [
        `M${x1},0`,
        `L${w},0`,
        `A${x1},${h / 2} 0 0,0 ${w},${h}`,
        `L${x1},${h}`,
        `A${x1},${h / 2} 0 0,1 ${x1},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartMagneticDrum', (w, h)=>{
    const x1 = w / 6;
    const x2 = w * 5 / 6;
    const ry = h / 2;
    return [
        `M${x1},0`,
        `L${x2},0`,
        `A${x1},${ry} 0 0,1 ${x2},${h}`,
        `L${x1},${h}`,
        `A${x1},${ry} 0 0,1 ${x1},0`,
        'Z',
        `M${x2},${h}`,
        `A${x1},${ry} 0 0,1 ${x2},0`
    ].join(' ');
});
presetShapes.set('flowChartMagneticTape', (w, h)=>{
    const wd2 = w / 2;
    const hd2 = h / 2;
    const hc = wd2;
    const vc = hd2;
    const ang1 = Math.atan2(h, w);
    const ib = vc + hd2 * Math.sin(Math.PI / 4);
    const arcTo = (curX, curY, wR, hR, stDeg, swDeg)=>{
        const stRad = stDeg * Math.PI / 180;
        const endRad = (stDeg + swDeg) * Math.PI / 180;
        const cx = curX - wR * Math.cos(stRad);
        const cy = curY - hR * Math.sin(stRad);
        const endX = cx + wR * Math.cos(endRad);
        const endY = cy + hR * Math.sin(endRad);
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        return {
            endX,
            endY,
            svg: `A${wR},${hR} 0 ${largeArc},${sweep} ${endX},${endY}`
        };
    };
    let curX = hc;
    let curY = h;
    const a1 = arcTo(curX, curY, wd2, hd2, 90, 90);
    curX = a1.endX;
    curY = a1.endY;
    const a2 = arcTo(curX, curY, wd2, hd2, 180, 90);
    curX = a2.endX;
    curY = a2.endY;
    const a3 = arcTo(curX, curY, wd2, hd2, 270, 90);
    curX = a3.endX;
    curY = a3.endY;
    const ang1Deg = ang1 * 180 / Math.PI;
    const a4 = arcTo(curX, curY, wd2, hd2, 0, ang1Deg);
    return [
        `M${hc},${h}`,
        a1.svg,
        a2.svg,
        a3.svg,
        a4.svg,
        `L${w},${ib}`,
        `L${w},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('flowChartMultidocument', (w, h)=>{
    const s = (x)=>w * x / 21600;
    const t = (y)=>h * y / 21600;
    return [
        `M0,${t(20782)}`,
        `C${s(9298)},${t(23542)} ${s(9298)},${t(18022)} ${s(18595)},${t(18022)}`,
        `L${s(18595)},${t(3675)} L0,${t(3675)} Z`,
        `M${s(1532)},${t(3675)} L${s(1532)},${t(1815)} L${s(20000)},${t(1815)}`,
        `L${s(20000)},${t(16252)}`,
        `C${s(19298)},${t(16252)} ${s(18595)},${t(16352)} ${s(18595)},${t(16352)}`,
        `L${s(18595)},${t(3675)} Z`,
        `M${s(2972)},${t(1815)} L${s(2972)},0 L${w},0`,
        `L${w},${t(14392)}`,
        `C${s(20800)},${t(14392)} ${s(20000)},${t(14467)} ${s(20000)},${t(14467)}`,
        `L${s(20000)},${t(1815)} Z`
    ].join(' ');
});
presetShapes.set('wedgeRectCallout', (w, h, adjustments)=>{
    const hc = w / 2;
    const vc = h / 2;
    const dxPos = w * (adjustments?.get('adj1') ?? -20833) / 100000;
    const dyPos = h * (adjustments?.get('adj2') ?? 62500) / 100000;
    const xPos = hc + dxPos;
    const yPos = vc + dyPos;
    const dq = dxPos * h / w;
    const ady = Math.abs(dyPos);
    const adq = Math.abs(dq);
    const dz = ady - adq;
    const x1 = w * (dxPos >= 0 ? 7 : 2) / 12;
    const x2 = w * (dxPos >= 0 ? 10 : 5) / 12;
    const y1 = h * (dyPos >= 0 ? 7 : 2) / 12;
    const y2 = h * (dyPos >= 0 ? 10 : 5) / 12;
    const xl = dz > 0 ? 0 : dxPos >= 0 ? 0 : xPos;
    const xt = dz > 0 ? dyPos >= 0 ? x1 : xPos : x1;
    const xr = dz > 0 ? w : dxPos >= 0 ? xPos : w;
    const xb = dz > 0 ? dyPos >= 0 ? xPos : x1 : x1;
    const yl = dz > 0 ? y1 : dxPos >= 0 ? y1 : yPos;
    const yt = dz > 0 ? dyPos >= 0 ? 0 : yPos : 0;
    const yr = dz > 0 ? y1 : dxPos >= 0 ? yPos : y1;
    const yb = dz > 0 ? dyPos >= 0 ? yPos : h : h;
    return [
        `M0,0`,
        `L${x1},0`,
        `L${xt},${yt}`,
        `L${x2},0`,
        `L${w},0`,
        `L${w},${y1}`,
        `L${xr},${yr}`,
        `L${w},${y2}`,
        `L${w},${h}`,
        `L${x2},${h}`,
        `L${xb},${yb}`,
        `L${x1},${h}`,
        `L0,${h}`,
        `L0,${y2}`,
        `L${xl},${yl}`,
        `L0,${y1}`,
        'Z'
    ].join(' ');
});
presetShapes.set('wedgeRoundRectCallout', (w, h, adjustments)=>{
    const hc = w / 2;
    const vc = h / 2;
    const ss = Math.min(w, h);
    const dxPos = w * (adjustments?.get('adj1') ?? -20833) / 100000;
    const dyPos = h * (adjustments?.get('adj2') ?? 62500) / 100000;
    const u1 = ss * (adjustments?.get('adj3') ?? 16667) / 100000;
    const xPos = hc + dxPos;
    const yPos = vc + dyPos;
    const dq = dxPos * h / w;
    const ady = Math.abs(dyPos);
    const adq = Math.abs(dq);
    const dz = ady - adq;
    const u2 = w - u1;
    const v2 = h - u1;
    const x1 = w * (dxPos >= 0 ? 7 : 2) / 12;
    const x2 = w * (dxPos >= 0 ? 10 : 5) / 12;
    const y1 = h * (dyPos >= 0 ? 7 : 2) / 12;
    const y2 = h * (dyPos >= 0 ? 10 : 5) / 12;
    const xl = dz > 0 ? 0 : dxPos >= 0 ? 0 : xPos;
    const xt = dz > 0 ? dyPos >= 0 ? x1 : xPos : x1;
    const xr = dz > 0 ? w : dxPos >= 0 ? xPos : w;
    const xb = dz > 0 ? dyPos >= 0 ? xPos : x1 : x1;
    const yl = dz > 0 ? y1 : dxPos >= 0 ? y1 : yPos;
    const yt = dz > 0 ? dyPos >= 0 ? 0 : yPos : 0;
    const yr = dz > 0 ? y1 : dxPos >= 0 ? yPos : y1;
    const yb = dz > 0 ? dyPos >= 0 ? yPos : h : h;
    return [
        `M0,${u1}`,
        `A${u1},${u1} 0 0,1 ${u1},0`,
        `L${x1},0`,
        `L${xt},${yt}`,
        `L${x2},0`,
        `L${u2},0`,
        `A${u1},${u1} 0 0,1 ${w},${u1}`,
        `L${w},${y1}`,
        `L${xr},${yr}`,
        `L${w},${y2}`,
        `L${w},${v2}`,
        `A${u1},${u1} 0 0,1 ${u2},${h}`,
        `L${x2},${h}`,
        `L${xb},${yb}`,
        `L${x1},${h}`,
        `L${u1},${h}`,
        `A${u1},${u1} 0 0,1 0,${v2}`,
        `L0,${y2}`,
        `L${xl},${yl}`,
        `L0,${y1}`,
        'Z'
    ].join(' ');
});
presetShapes.set('wedgeEllipseCallout', (w, h, adjustments)=>{
    const ax = adj(adjustments, 'adj1', -20833);
    const ay = adj(adjustments, 'adj2', 62500);
    const rx = w / 2;
    const ry = h / 2;
    const tipX = rx + w * ax;
    const tipY = ry + h * ay;
    const angle = Math.atan2(tipY - ry, tipX - rx);
    const gapAngle = 0.15;
    const _x1 = rx + rx * Math.cos(angle - gapAngle);
    const _y1 = ry + ry * Math.sin(angle - gapAngle);
    const _x2 = rx + rx * Math.cos(angle + gapAngle);
    const _y2 = ry + ry * Math.sin(angle + gapAngle);
    return [
        shapeArc(rx, ry, rx, ry, (angle + gapAngle) * 180 / Math.PI, (angle - gapAngle + 2 * Math.PI) * 180 / Math.PI, false),
        `L${tipX},${tipY}`,
        'Z'
    ].join(' ');
});
presetShapes.set('cloudCallout', (w, h, adjustments)=>{
    const ax = adj(adjustments, 'adj1', -20833);
    const ay = adj(adjustments, 'adj2', 62500);
    const tipX = w / 2 + w * ax;
    const tipY = h / 2 + h * ay;
    const cloud = presetShapes.get('cloud')(w, h);
    const cx = w / 2;
    const cy = h / 2;
    const dx = tipX - cx;
    const dy = tipY - cy;
    const r1 = Math.min(w, h) * 0.04;
    const r2 = Math.min(w, h) * 0.025;
    const c1x = cx + dx * 0.5;
    const c1y = cy + dy * 0.5;
    const c2x = cx + dx * 0.75;
    const c2y = cy + dy * 0.75;
    return [
        cloud,
        `M${c1x + r1},${c1y} A${r1},${r1} 0 1,1 ${c1x - r1},${c1y} A${r1},${r1} 0 1,1 ${c1x + r1},${c1y} Z`,
        `M${c2x + r2},${c2y} A${r2},${r2} 0 1,1 ${c2x - r2},${c2y} A${r2},${r2} 0 1,1 ${c2x + r2},${c2y} Z`
    ].join(' ');
});
presetShapes.set('borderCallout1', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 112500) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -38333) / 100000;
    return `M0,0 L${w},0 L${w},${h} L0,${h} Z M${x1},${y1} L${x2},${y2}`;
});
presetShapes.set('cube', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 25000);
    const depth = Math.min(w, h) * a;
    return [
        `M0,${depth} L${w - depth},${depth} L${w - depth},${h} L0,${h} Z`,
        `M0,${depth} L${depth},0 L${w},0 L${w - depth},${depth} Z`,
        `M${w - depth},${depth} L${w},0 L${w},${h - depth} L${w - depth},${h} Z`
    ].join(' ');
});
presetShapes.set('plus', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 25000), 0), 50000);
    const x1 = ss * a / 100000;
    const x2 = w - x1;
    const y2 = h - x1;
    return [
        `M0,${x1}`,
        `L${x1},${x1}`,
        `L${x1},0`,
        `L${x2},0`,
        `L${x2},${x1}`,
        `L${w},${x1}`,
        `L${w},${y2}`,
        `L${x2},${y2}`,
        `L${x2},${h}`,
        `L${x1},${h}`,
        `L${x1},${y2}`,
        `L0,${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('heart', (w, h)=>{
    const hc = w / 2;
    const hd4 = h / 4;
    const hd3 = h / 3;
    const dx1 = w * 49 / 48;
    const dx2 = w * 10 / 48;
    const x1 = hc - dx1;
    const x2 = hc - dx2;
    const x3 = hc + dx2;
    const x4 = hc + dx1;
    const y1 = -hd3;
    return [
        `M${hc},${hd4}`,
        `C${x3},${y1} ${x4},${hd4} ${hc},${h}`,
        `C${x1},${hd4} ${x2},${y1} ${hc},${hd4}`,
        'Z'
    ].join(' ');
});
presetShapes.set('cloud', (w, h)=>{
    const sx = w / 43200;
    const sy = h / 43200;
    const arcs = [
        [
            6753,
            9190,
            -11429249,
            7426832
        ],
        [
            5333,
            7267,
            -8646143,
            5396714
        ],
        [
            4365,
            5945,
            -8748475,
            5983381
        ],
        [
            4857,
            6595,
            -7859164,
            7034504
        ],
        [
            5333,
            7273,
            -4722533,
            6541615
        ],
        [
            6775,
            9220,
            -2776035,
            7816140
        ],
        [
            5785,
            7867,
            37501,
            6842000
        ],
        [
            6752,
            9215,
            1347096,
            6910353
        ],
        [
            7720,
            10543,
            3974558,
            4542661
        ],
        [
            4360,
            5918,
            -16496525,
            8804134
        ],
        [
            4345,
            5945,
            -14809710,
            9151131
        ]
    ];
    let curX = 3900 * sx;
    let curY = 14370 * sy;
    const parts = [
        `M${curX},${curY}`
    ];
    let ux = 3900, uy = 14370;
    for (const [wR, hR, stAng60k, swAng60k] of arcs){
        const stDeg = stAng60k / 60000;
        const swDeg = swAng60k / 60000;
        const stVisRad = stDeg * Math.PI / 180;
        const stRad = Math.atan2(wR * Math.sin(stVisRad), hR * Math.cos(stVisRad));
        const endVisRad = (stDeg + swDeg) * Math.PI / 180;
        const endRad = Math.atan2(wR * Math.sin(endVisRad), hR * Math.cos(endVisRad));
        const acx = ux - wR * Math.cos(stRad);
        const acy = uy - hR * Math.sin(stRad);
        const endUX = acx + wR * Math.cos(endRad);
        const endUY = acy + hR * Math.sin(endRad);
        const endX = endUX * sx;
        const endY = endUY * sy;
        const rwS = wR * sx;
        const rhS = hR * sy;
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        parts.push(`A${rwS},${rhS} 0 ${largeArc},${sweep} ${endX},${endY}`);
        ux = endUX;
        uy = endUY;
        curX = endX;
        curY = endY;
    }
    parts.push('Z');
    return parts.join(' ');
});
presetShapes.set('frame', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj1', 12500);
    const t = Math.min(w, h) * a;
    return [
        `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
        `M${t},${t} L${t},${h - t} L${w - t},${h - t} L${w - t},${t} Z`
    ].join(' ');
});
presetShapes.set('halfFrame', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 33333;
    const adj2Raw = adjustments?.get('adj2') ?? 33333;
    const minWH = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adj2Raw, 100000 * w / Math.max(minWH, 1)));
    const x1 = minWH * a2 / 100000;
    const g1 = h * x1 / Math.max(w, 1);
    const g2 = h - g1;
    const a1 = Math.max(0, Math.min(adj1Raw, 100000 * g2 / Math.max(minWH, 1)));
    const y1 = minWH * a1 / 100000;
    const x2 = w - y1 * w / Math.max(h, 1);
    const y2 = h - x1 * h / Math.max(w, 1);
    return [
        `M0,0`,
        `L${w},0`,
        `L${x2},${y1}`,
        `L${x1},${y1}`,
        `L${x1},${y2}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('donut', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 25000), 0), 50000);
    const dr = ss * a / 100000;
    const rx = w / 2;
    const ry = h / 2;
    const iwd2 = Math.max(0, rx - dr);
    const ihd2 = Math.max(0, ry - dr);
    return [
        `M0,${ry}`,
        `A${rx},${ry} 0 1,1 ${w},${ry}`,
        `A${rx},${ry} 0 1,1 0,${ry}`,
        'Z',
        `M${dr},${ry}`,
        `A${iwd2},${ihd2} 0 1,0 ${w - dr},${ry}`,
        `A${iwd2},${ihd2} 0 1,0 ${dr},${ry}`,
        'Z'
    ].join(' ');
});
presetShapes.set('noSmoking', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 18750), 0), 50000);
    const dr = ss * a / 100000;
    const rx = w / 2;
    const ry = h / 2;
    const hc = w / 2;
    const vc = h / 2;
    const iwd2 = rx - dr;
    const ihd2 = ry - dr;
    const ang = Math.atan2(h, w);
    const ct = ihd2 * Math.cos(ang);
    const st = iwd2 * Math.sin(ang);
    const m = Math.sqrt(ct * ct + st * st) || 1;
    const n = iwd2 * ihd2 / m;
    const drd2 = dr / 2;
    const dang = Math.atan2(drd2, n);
    const dang2 = dang * 2;
    const swAngRad = -(Math.PI - dang2);
    const stAng1 = ang - dang;
    const stAng2 = stAng1 - Math.PI;
    const innerPt = (angle)=>{
        const ct2 = ihd2 * Math.cos(angle);
        const st2 = iwd2 * Math.sin(angle);
        const m2 = Math.sqrt(ct2 * ct2 + st2 * st2) || 1;
        const n2 = iwd2 * ihd2 / m2;
        return {
            x: hc + n2 * Math.cos(angle),
            y: vc + n2 * Math.sin(angle)
        };
    };
    const p1 = innerPt(stAng1);
    const p2 = innerPt(stAng2);
    const endAng1 = stAng1 + swAngRad;
    const endAng2 = stAng2 + swAngRad;
    const e1 = innerPt(endAng1);
    const e2 = innerPt(endAng2);
    const largeArc = Math.abs(swAngRad) > Math.PI ? 1 : 0;
    const sweep = swAngRad > 0 ? 1 : 0;
    return [
        `M0,${vc}`,
        `A${rx},${ry} 0 1,1 ${w},${vc}`,
        `A${rx},${ry} 0 1,1 0,${vc}`,
        'Z',
        `M${p1.x},${p1.y}`,
        `A${iwd2},${ihd2} 0 ${largeArc},${sweep} ${e1.x},${e1.y}`,
        'Z',
        `M${p2.x},${p2.y}`,
        `A${iwd2},${ihd2} 0 ${largeArc},${sweep} ${e2.x},${e2.y}`,
        'Z'
    ].join(' ');
});
presetShapes.set('blockArc', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 10800000;
    const adj2Raw = adjustments?.get('adj2') ?? 0;
    const adj3Raw = adjustments?.get('adj3') ?? 25000;
    const startDeg = Math.min(Math.max(adj1Raw / 60000, 0), 360);
    const innerStartDeg = Math.min(Math.max(adj2Raw / 60000, 0), 360);
    const sweepDeg = (innerStartDeg - startDeg + 360) % 360 || 360;
    const endDeg = startDeg + sweepDeg;
    const innerEndDeg = innerStartDeg - sweepDeg;
    const wd2 = w / 2;
    const hd2 = h / 2;
    const dr = Math.min(w, h) * Math.max(0, Math.min(adj3Raw, 50000)) / 100000;
    const iwd2 = Math.max(1, wd2 - dr);
    const ihd2 = Math.max(1, hd2 - dr);
    const p = (cx, cy, rx, ry, deg)=>{
        const r = deg * Math.PI / 180;
        return {
            x: cx + rx * Math.cos(r),
            y: cy + ry * Math.sin(r)
        };
    };
    const oStart = p(wd2, hd2, wd2, hd2, startDeg);
    const oEnd = p(wd2, hd2, wd2, hd2, endDeg);
    const iStart = p(wd2, hd2, iwd2, ihd2, innerStartDeg);
    const iEnd = p(wd2, hd2, iwd2, ihd2, innerEndDeg);
    const largeArc = sweepDeg > 180 ? 1 : 0;
    return [
        `M${oStart.x},${oStart.y}`,
        `A${wd2},${hd2} 0 ${largeArc},1 ${oEnd.x},${oEnd.y}`,
        `L${iStart.x},${iStart.y}`,
        `A${iwd2},${ihd2} 0 ${largeArc},0 ${iEnd.x},${iEnd.y}`,
        'Z'
    ].join(' ');
});
presetShapes.set('gear6', (w, h, adjustments)=>{
    const a1 = adjustments?.get('adj1') ?? 15000;
    const a2 = adjustments?.get('adj2') ?? 3526;
    return gearShape(w, h, 6, a1, a2);
});
presetShapes.set('gear9', (w, h, adjustments)=>{
    const a1 = adjustments?.get('adj1') ?? 10000;
    const a2 = adjustments?.get('adj2') ?? 1763;
    return gearShape(w, h, 9, a1, a2);
});
function gearShape(w, h, teeth, adj1Raw, adj2Raw) {
    const cx = w / 2;
    const cy = h / 2;
    const ss = Math.min(w, h);
    const maxAdj2 = teeth === 6 ? 5358 : 2679;
    const a1v = Math.min(Math.max(adj1Raw, 0), 20000);
    const a2v = Math.min(Math.max(adj2Raw, 0), maxAdj2);
    const th = ss * a1v / 100000;
    const lFD = ss * a2v / 100000;
    const rw = w / 2 - th;
    const rh = h / 2 - th;
    if (rw <= 0 || rh <= 0) return `M0,0 L${w},0 L${w},${h} L0,${h} Z`;
    const l3 = th / 2 + lFD / 2;
    const maxr = Math.min(rw, rh);
    const ha = Math.atan2(l3, maxr);
    const centerDegs = teeth === 6 ? [
        330,
        30,
        90,
        150,
        210,
        270
    ] : [
        310,
        350,
        30,
        70,
        110,
        150,
        190,
        230,
        270
    ];
    const parts = [];
    for(let i = 0; i < centerDegs.length; i++){
        const baseAngle = centerDegs[i] * Math.PI / 180;
        const aStart = baseAngle - ha;
        const aEnd = baseAngle + ha;
        const ax = cx + rw * Math.cos(aStart);
        const ay = cy + rh * Math.sin(aStart);
        const dx = cx + rw * Math.cos(aEnd);
        const dy = cy + rh * Math.sin(aEnd);
        const edgeX = dx - ax;
        const edgeY = dy - ay;
        const edgeLen = Math.sqrt(edgeX * edgeX + edgeY * edgeY);
        const radX = Math.cos(baseAngle);
        const radY = Math.sin(baseAngle);
        let nx = radX;
        let ny = radY;
        if (edgeLen > 0) {
            nx = -edgeY / edgeLen;
            ny = edgeX / edgeLen;
        }
        if (nx * radX + ny * radY < 0) {
            nx = -nx;
            ny = -ny;
        }
        const ex = edgeLen > 0 ? edgeX / edgeLen : 0;
        const ey = edgeLen > 0 ? edgeY / edgeLen : 0;
        const axN = ax + ex * lFD;
        const ayN = ay + ey * lFD;
        const dxN = dx - ex * lFD;
        const dyN = dy - ey * lFD;
        const bx = axN + nx * th;
        const by = ayN + ny * th;
        const _cx = dxN + nx * th;
        const _cy = dyN + ny * th;
        if (i === 0) {
            const prevEnd = centerDegs[centerDegs.length - 1] * Math.PI / 180 + ha;
            const prevIx = cx + rw * Math.cos(prevEnd);
            const prevIy = cy + rh * Math.sin(prevEnd);
            parts.push(`M${prevIx},${prevIy}`);
            parts.push(`A${rw},${rh} 0 0,1 ${ax},${ay}`);
        }
        parts.push(`L${bx},${by}`);
        parts.push(`L${_cx},${_cy}`);
        parts.push(`L${dx},${dy}`);
        if (i < centerDegs.length - 1) {
            const nextStart = centerDegs[i + 1] * Math.PI / 180 - ha;
            const nx2 = cx + rw * Math.cos(nextStart);
            const ny2 = cy + rh * Math.sin(nextStart);
            parts.push(`A${rw},${rh} 0 0,1 ${nx2},${ny2}`);
        }
    }
    parts.push('Z');
    return parts.join(' ');
}
presetShapes.set('mathPlus', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj', 23520), 0), 73490);
    const dx1 = w * 73490 / 200000;
    const dy1 = h * 73490 / 200000;
    const dx2 = ss * a1 / 200000;
    const hc = w / 2;
    const vc = h / 2;
    const x1 = hc - dx1;
    const x2 = hc - dx2;
    const x3 = hc + dx2;
    const x4 = hc + dx1;
    const y1 = vc - dy1;
    const y2 = vc - dx2;
    const y3 = vc + dx2;
    const y4 = vc + dy1;
    return [
        `M${x1},${y2}`,
        `L${x2},${y2}`,
        `L${x2},${y1}`,
        `L${x3},${y1}`,
        `L${x3},${y2}`,
        `L${x4},${y2}`,
        `L${x4},${y3}`,
        `L${x3},${y3}`,
        `L${x3},${y4}`,
        `L${x2},${y4}`,
        `L${x2},${y3}`,
        `L${x1},${y3}`,
        'Z'
    ].join(' ');
});
presetShapes.set('mathMinus', (w, h, adjustments)=>{
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 23520), 0), 100000);
    const dy1 = h * a1 / 200000;
    const dx1 = w * 73490 / 200000;
    const hc = w / 2;
    const vc = h / 2;
    const x1 = hc - dx1;
    const x2 = hc + dx1;
    const y1 = vc - dy1;
    const y2 = vc + dy1;
    return `M${x1},${y1} L${x2},${y1} L${x2},${y2} L${x1},${y2} Z`;
});
presetShapes.set('mathMultiply', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const hc = w / 2;
    const vc = h / 2;
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 23520), 0), 51965);
    const th = ss * a1 / 100000;
    const a = Math.atan2(h, w);
    const sa = Math.sin(a);
    const ca = Math.cos(a);
    const ta = sa / ca;
    const dl = Math.sqrt(w * w + h * h);
    const rw = dl * 51965 / 100000;
    const lM = dl - rw;
    const xM = ca * lM / 2;
    const yM = sa * lM / 2;
    const dxAM = sa * th / 2;
    const dyAM = ca * th / 2;
    const xA = xM - dxAM;
    const yA = yM + dyAM;
    const xB = xM + dxAM;
    const yB = yM - dyAM;
    const xBC = hc - xB;
    const yBC = xBC * ta;
    const yC = yBC + yB;
    const xD = w - xB;
    const xE = w - xA;
    const yFE = vc - yA;
    const xFE = yFE / ta;
    const xF = xE - xFE;
    const xL = xA + xFE;
    const yG = h - yA;
    const yH = h - yB;
    const yI = h - yC;
    return [
        `M${xA},${yA}`,
        `L${xB},${yB}`,
        `L${hc},${yC}`,
        `L${xD},${yB}`,
        `L${xE},${yA}`,
        `L${xF},${vc}`,
        `L${xE},${yG}`,
        `L${xD},${yH}`,
        `L${hc},${yI}`,
        `L${xB},${yH}`,
        `L${xA},${yG}`,
        `L${xL},${vc}`,
        'Z'
    ].join(' ');
});
presetShapes.set('mathDivide', (w, h, adjustments)=>{
    const adj1 = adjustments?.get('adj1') ?? 23520;
    const adj2 = adjustments?.get('adj2') ?? 5880;
    const adj3 = adjustments?.get('adj3') ?? 11760;
    const a1 = Math.min(Math.max(adj1, 1000), 36745);
    const maxAdj3 = Math.min((73490 - a1) / 4, 36745 * w / Math.max(h, 1));
    const a3 = Math.min(Math.max(adj3, 1000), maxAdj3);
    const maxAdj2 = 73490 - 4 * a3 - a1;
    const a2 = Math.min(Math.max(adj2, 0), maxAdj2);
    const hc = w / 2;
    const vc = h / 2;
    const dy1 = h * a1 / 200000;
    const yg = h * a2 / 100000;
    const rad = h * a3 / 100000;
    const dx1 = w * 73490 / 200000;
    const y3 = vc - dy1;
    const y4 = vc + dy1;
    const y2 = y3 - (yg + rad);
    const y1 = y2 - rad;
    const y5 = h - y1;
    const x1 = hc - dx1;
    const x3 = hc + dx1;
    return [
        `M${hc + rad},${y1 + rad} A${rad},${rad} 0 1,1 ${hc - rad},${y1 + rad} A${rad},${rad} 0 1,1 ${hc + rad},${y1 + rad} Z`,
        `M${hc + rad},${y5 - rad} A${rad},${rad} 0 1,1 ${hc - rad},${y5 - rad} A${rad},${rad} 0 1,1 ${hc + rad},${y5 - rad} Z`,
        `M${x1},${y3} L${x3},${y3} L${x3},${y4} L${x1},${y4} Z`
    ].join(' ');
});
presetShapes.set('mathEqual', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 23520;
    const adj2Raw = adjustments?.get('adj2') ?? 11760;
    const a1 = Math.min(Math.max(adj1Raw, 0), 36745);
    const mAdj2 = 100000 - a1 * 2;
    const a2 = Math.min(Math.max(adj2Raw, 0), Math.max(mAdj2, 0));
    const dy1 = h * a1 / 100000;
    const dy2 = h * a2 / 200000;
    const dx1 = w * 73490 / 200000;
    const hc = w / 2;
    const vc = h / 2;
    const y2 = vc - dy2;
    const y3 = vc + dy2;
    const y1 = y2 - dy1;
    const y4 = y3 + dy1;
    const x1 = hc - dx1;
    const x2 = hc + dx1;
    return [
        `M${x1},${y1} L${x2},${y1} L${x2},${y2} L${x1},${y2} Z`,
        `M${x1},${y3} L${x2},${y3} L${x2},${y4} L${x1},${y4} Z`
    ].join(' ');
});
presetShapes.set('mathNotEqual', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 23520;
    const adj2Raw = adjustments?.get('adj2');
    const adj3Raw = adjustments?.get('adj3') ?? 11760;
    const hc = w / 2;
    const vc = h / 2;
    const hd2 = h / 2;
    const a1 = Math.min(Math.max(adj1Raw, 0), 50000);
    const crAng = (()=>{
        if (adj2Raw === undefined) return 110 * Math.PI / 180;
        const rad = adj2Raw / 60000 * Math.PI / 180;
        const min = 70 * Math.PI / 180;
        const max = 110 * Math.PI / 180;
        return Math.min(Math.max(rad, min), max);
    })();
    const maxAdj3 = 100000 - a1 * 2;
    const a3 = Math.min(Math.max(adj3Raw, 0), maxAdj3);
    const dy1 = h * a1 / 100000;
    const dy2 = h * a3 / 200000;
    const dx1 = w * 73490 / 200000;
    const x1 = hc - dx1;
    const x8 = hc + dx1;
    const y2 = vc - dy2;
    const y3 = vc + dy2;
    const y1 = y2 - dy1;
    const y4 = y3 + dy1;
    const cadj2 = crAng - Math.PI / 2;
    const xadj2 = hd2 * Math.tan(cadj2);
    const len = Math.hypot(xadj2, hd2) || 1;
    const bhw = len * dy1 / hd2;
    const bhw2 = bhw / 2;
    const x7 = hc + xadj2 - bhw2;
    const x6 = x7 - xadj2 * y1 / hd2;
    const x5 = x7 - xadj2 * y2 / hd2;
    const x4 = x7 - xadj2 * y3 / hd2;
    const x3 = x7 - xadj2 * y4 / hd2;
    const rx7 = x7 + bhw;
    const rx6 = x6 + bhw;
    const rx5 = x5 + bhw;
    const rx4 = x4 + bhw;
    const rx3 = x3 + bhw;
    const dx7 = dy1 * hd2 / len;
    const rx = cadj2 > 0 ? x7 + dx7 : rx7;
    const lx = cadj2 > 0 ? x7 : rx7 - dx7;
    const dy3 = dy1 * xadj2 / len;
    const ry = cadj2 > 0 ? dy3 : 0;
    const ly = cadj2 > 0 ? 0 : -dy3;
    const dlx = w - rx;
    const drx = w - lx;
    const dly = h - ry;
    const dry = h - ly;
    return [
        `M${x1},${y1}`,
        `L${x6},${y1}`,
        `L${lx},${ly}`,
        `L${rx},${ry}`,
        `L${rx6},${y1}`,
        `L${x8},${y1}`,
        `L${x8},${y2}`,
        `L${rx5},${y2}`,
        `L${rx4},${y3}`,
        `L${x8},${y3}`,
        `L${x8},${y4}`,
        `L${rx3},${y4}`,
        `L${drx},${dry}`,
        `L${dlx},${dly}`,
        `L${x3},${y4}`,
        `L${x1},${y4}`,
        `L${x1},${y3}`,
        `L${x4},${y3}`,
        `L${x5},${y2}`,
        `L${x1},${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('round1Rect', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 16667);
    const r = Math.min(w, h) * a;
    return [
        `M0,0`,
        `L${w - r},0`,
        `A${r},${r} 0 0,1 ${w},${r}`,
        `L${w},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('round2SameRect', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 16667);
    const a2 = adj(adjustments, 'adj2', 0);
    const r1 = Math.min(w, h) * a1;
    const r2 = Math.min(w, h) * a2;
    return [
        `M${r1},0`,
        `L${w - r1},0`,
        `A${r1},${r1} 0 0,1 ${w},${r1}`,
        `L${w},${h - r2}`,
        `A${r2},${r2} 0 0,1 ${w - r2},${h}`,
        `L${r2},${h}`,
        `A${r2},${r2} 0 0,1 0,${h - r2}`,
        `L0,${r1}`,
        `A${r1},${r1} 0 0,1 ${r1},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('round2DiagRect', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 16667);
    const a2 = adj(adjustments, 'adj2', 0);
    const r1 = Math.min(w, h) * a1;
    const r2 = Math.min(w, h) * a2;
    return [
        `M${r1},0`,
        `L${w},0`,
        `L${w},${h - r2}`,
        `A${r2},${r2} 0 0,1 ${w - r2},${h}`,
        `L0,${h}`,
        `L0,${r1}`,
        `A${r1},${r1} 0 0,1 ${r1},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('snip1Rect', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 16667);
    const d = Math.min(w, h) * a;
    return `M0,0 L${w - d},0 L${w},${d} L${w},${h} L0,${h} Z`;
});
presetShapes.set('snip2SameRect', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 16667);
    const a2 = adj(adjustments, 'adj2', 0);
    const d1 = Math.min(w, h) * a1;
    const d2 = Math.min(w, h) * a2;
    return `M${d1},0 L${w - d1},0 L${w},${d1} L${w},${h - d2} L${w - d2},${h} L${d2},${h} L0,${h - d2} L0,${d1} Z`;
});
presetShapes.set('snip2DiagRect', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a1 = Math.min(Math.max(adjustments?.get('adj1') ?? 0, 0), 50000);
    const a2 = Math.min(Math.max(adjustments?.get('adj2') ?? 16667, 0), 50000);
    const lx1 = ss * a1 / 100000;
    const lx2 = w - lx1;
    const ly1 = h - lx1;
    const rx1 = ss * a2 / 100000;
    const rx2 = w - rx1;
    const ry1 = h - rx1;
    return `M${lx1},0 L${rx2},0 L${w},${rx1} L${w},${ly1} L${lx2},${h} L${rx1},${h} L0,${ry1} L0,${lx1} Z`;
});
presetShapes.set('snipRoundRect', (w, h, adjustments)=>{
    const a1 = adj(adjustments, 'adj1', 16667);
    const a2 = adj(adjustments, 'adj2', 16667);
    const r = Math.min(w, h) * a1;
    const d = Math.min(w, h) * a2;
    return [
        `M${r},0`,
        `L${w - d},0`,
        `L${w},${d}`,
        `L${w},${h}`,
        `L0,${h}`,
        `L0,${r}`,
        `A${r},${r} 0 0,1 ${r},0`,
        'Z'
    ].join(' ');
});
presetShapes.set('bevel', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 12500);
    const t = Math.min(w, h) * a;
    return [
        `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
        `M${t},${t} L${t},${h - t} L${w - t},${h - t} L${w - t},${t} Z`,
        `M0,0 L${w},0 L${w - t},${t} L${t},${t} Z`,
        `M${w},0 L${w},${h} L${w - t},${h - t} L${w - t},${t} Z`,
        `M${w},${h} L0,${h} L${t},${h - t} L${w - t},${h - t} Z`,
        `M0,${h} L0,0 L${t},${t} L${t},${h - t} Z`
    ].join(' ');
});
presetShapes.set('foldedCorner', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 16667);
    const fold = Math.min(w, h) * a * 0.7;
    return [
        `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
        `M${w - fold},${h} L${w},${h} L${w},${h - fold}`
    ].join(' ');
});
presetShapes.set('sun', (w, h, adjustments)=>{
    const adjRaw = adjustments?.get('adj') ?? 25000;
    const a = Math.min(Math.max(adjRaw, 12500), 46875);
    const g0 = 50000 - a;
    const g1 = g0 * 30274 / 32768;
    const g2 = g0 * 12540 / 32768;
    const _g3 = g1 + 50000;
    const _g4 = g2 + 50000;
    const g5 = 50000 - g1;
    const g6 = 50000 - g2;
    const g7 = g0 * 23170 / 32768;
    const g8 = 50000 + g7;
    const g9 = 50000 - g7;
    const g10 = g5 * 3 / 4;
    const g11 = g6 * 3 / 4;
    const g12 = g10 + 3662;
    const g13 = g11 + 3662;
    const g14 = g11 + 12500;
    const g15 = 100000 - g10;
    const g16 = 100000 - g12;
    const g17 = 100000 - g13;
    const g18 = 100000 - g14;
    const hc = w / 2;
    const vc = h / 2;
    const ox1 = w * 18436 / 21600;
    const oy1 = h * 3163 / 21600;
    const ox2 = w * 3163 / 21600;
    const oy2 = h * 18436 / 21600;
    const s = (pct, dim)=>dim * pct / 100000;
    const _x8 = s(g8, w);
    const _x9 = s(g9, w);
    const x10 = s(g10, w);
    const x12 = s(g12, w);
    const x13 = s(g13, w);
    const x14 = s(g14, w);
    const x15 = s(g15, w);
    const x16 = s(g16, w);
    const x17 = s(g17, w);
    const x18 = s(g18, w);
    const wR = s(g0, w);
    const hR = s(g0, h);
    const _y8 = s(g8, h);
    const _y9 = s(g9, h);
    const y10 = s(g10, h);
    const y12 = s(g12, h);
    const y13 = s(g13, h);
    const y14 = s(g14, h);
    const y15 = s(g15, h);
    const y16 = s(g16, h);
    const y17 = s(g17, h);
    const y18 = s(g18, h);
    const x19 = s(a, w);
    return [
        `M${w},${vc} L${x15},${y18} L${x15},${y14} Z`,
        `M${ox1},${oy1} L${x16},${y13} L${x17},${y12} Z`,
        `M${hc},0 L${x18},${y10} L${x14},${y10} Z`,
        `M${ox2},${oy1} L${x13},${y12} L${x12},${y13} Z`,
        `M0,${vc} L${x10},${y14} L${x10},${y18} Z`,
        `M${ox2},${oy2} L${x12},${y17} L${x13},${y16} Z`,
        `M${hc},${h} L${x14},${y15} L${x18},${y15} Z`,
        `M${ox1},${oy2} L${x17},${y16} L${x16},${y17} Z`,
        `M${x19},${vc}`,
        `A${wR},${hR} 0 1,1 ${x19 + 2 * wR},${vc}`,
        `A${wR},${hR} 0 1,1 ${x19},${vc}`,
        'Z'
    ].join(' ');
});
presetShapes.set('moon', (w, h, adjustments)=>{
    if (w <= 0 || h <= 0) return `M0,0 L${w},0 L${w},${h} L0,${h} Z`;
    const ss = Math.min(w, h);
    const hd2 = h / 2;
    const a = Math.min(Math.max(adjustments?.get('adj') ?? 50000, 0), 87500);
    const g0 = ss * a / 100000;
    const g1 = ss - g0;
    if (g1 <= 0) return `M0,0 L${w},0 L${w},${h} L0,${h} Z`;
    const g0w = g0 * w / ss;
    const g5 = (2 * ss * ss - g0 * g0) / g1;
    const g6w = (g5 - g0) * w / ss;
    const g8 = g5 / 2 - g0;
    const dy1 = g8 * hd2 / ss;
    const g18w = (g6w - g0w) / 2;
    return [
        `M${w},${h}`,
        `A${w},${hd2} 0 0,1 ${w},0`,
        `A${g18w},${dy1} 0 0,0 ${w},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('lightningBolt', (w, h)=>{
    return [
        `M${w * 0.3895},${h * 0.0}`,
        `L${w * 0.0},${h * 0.1821}`,
        `L${w * 0.3425},${h * 0.3845}`,
        `L${w * 0.2265},${h * 0.4452}`,
        `L${w * 0.5497},${h * 0.6391}`,
        `L${w * 0.453},${h * 0.683}`,
        `L${w * 0.9972},${h * 0.9983}`,
        `L${w * 0.6796},${h * 0.5919}`,
        `L${w * 0.7624},${h * 0.5514}`,
        `L${w * 0.5138},${h * 0.3153}`,
        `L${w * 0.5939},${h * 0.2816}`,
        'Z'
    ].join(' ');
});
presetShapes.set('bracketPair', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a = Math.min(Math.max(adjRaw(adjustments, 'adj', 16667), 0), 50000);
    const r = ss * a / 100000;
    const x2 = w - r;
    const y2 = h - r;
    return [
        `M${r},${h}`,
        `A${r},${r} 0 0,1 0,${y2}`,
        `L0,${r}`,
        `A${r},${r} 0 0,1 ${r},0`,
        `M${x2},0`,
        `A${r},${r} 0 0,1 ${w},${r}`,
        `L${w},${y2}`,
        `A${r},${r} 0 0,1 ${x2},${h}`
    ].join(' ');
});
presetShapes.set('bracePair', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 8333);
    const r = Math.min(w, h) * a;
    const cy = h / 2;
    return [
        `M${r * 2},0`,
        `A${r},${r} 0 0,0 ${r},${r}`,
        `L${r},${cy - r}`,
        `A${r},${r} 0 0,1 0,${cy}`,
        `A${r},${r} 0 0,1 ${r},${cy + r}`,
        `L${r},${h - r}`,
        `A${r},${r} 0 0,0 ${r * 2},${h}`,
        `M${w - r * 2},0`,
        `A${r},${r} 0 0,1 ${w - r},${r}`,
        `L${w - r},${cy - r}`,
        `A${r},${r} 0 0,0 ${w},${cy}`,
        `A${r},${r} 0 0,0 ${w - r},${cy + r}`,
        `L${w - r},${h - r}`,
        `A${r},${r} 0 0,1 ${w - r * 2},${h}`
    ].join(' ');
});
presetShapes.set('leftBracket', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = ss > 0 ? 50000 * h / ss : 0;
    const a = Math.max(0, Math.min(adjustments?.get('adj') ?? 8333, maxAdj));
    const y1 = ss * a / 100000;
    const toDeg = (ooxmlAng)=>ooxmlAng / 60000;
    const arcFrom = (x0, y0, rx, ry, stAng, swAng)=>{
        const st = toDeg(stAng) * Math.PI / 180;
        const sw = toDeg(swAng) * Math.PI / 180;
        const cx = x0 - rx * Math.cos(st);
        const cy = y0 - ry * Math.sin(st);
        const x1 = cx + rx * Math.cos(st + sw);
        const y1p = cy + ry * Math.sin(st + sw);
        const large = Math.abs(toDeg(swAng)) > 180 ? 1 : 0;
        const sweep = swAng >= 0 ? 1 : 0;
        return {
            cmd: `A${rx},${ry} 0 ${large},${sweep} ${x1},${y1p}`,
            x: x1,
            y: y1p
        };
    };
    const a1 = arcFrom(w, h, w, y1, 5400000, 5400000);
    const a2 = arcFrom(0, y1, w, y1, 10800000, 5400000);
    return [
        `M${w},${h}`,
        a1.cmd,
        `L0,${y1}`,
        a2.cmd
    ].join(' ');
});
presetShapes.set('rightBracket', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = ss > 0 ? 50000 * h / ss : 0;
    const a = Math.max(0, Math.min(adjustments?.get('adj') ?? 8333, maxAdj));
    const y1 = ss * a / 100000;
    const y2 = h - y1;
    const toDeg = (ooxmlAng)=>ooxmlAng / 60000;
    const arcFrom = (x0, y0, rx, ry, stAng, swAng)=>{
        const st = toDeg(stAng) * Math.PI / 180;
        const sw = toDeg(swAng) * Math.PI / 180;
        const cx = x0 - rx * Math.cos(st);
        const cy = y0 - ry * Math.sin(st);
        const x1 = cx + rx * Math.cos(st + sw);
        const y1p = cy + ry * Math.sin(st + sw);
        const large = Math.abs(toDeg(swAng)) > 180 ? 1 : 0;
        const sweep = swAng >= 0 ? 1 : 0;
        return {
            cmd: `A${rx},${ry} 0 ${large},${sweep} ${x1},${y1p}`,
            x: x1,
            y: y1p
        };
    };
    const a1 = arcFrom(0, 0, w, y1, 16200000, 5400000);
    const a2 = arcFrom(w, y2, w, y1, 0, 5400000);
    return [
        `M0,0`,
        a1.cmd,
        `L${w},${y2}`,
        a2.cmd
    ].join(' ');
});
presetShapes.set('leftBrace', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 50000, 100000));
    const q1 = 100000 - a2;
    const q2 = Math.min(q1, a2);
    const q3 = q2 / 2;
    const maxAdj1 = ss > 0 ? q3 * h / ss : 0;
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 8333, maxAdj1));
    const y1 = ss * a1 / 100000;
    const y3 = h * a2 / 100000;
    const y4 = y3 + y1;
    const wd2 = w / 2;
    const hc = w / 2;
    const toDeg = (ooxmlAng)=>ooxmlAng / 60000;
    const arcFrom = (x0, y0, rx, ry, stAng, swAng)=>{
        const st = toDeg(stAng) * Math.PI / 180;
        const sw = toDeg(swAng) * Math.PI / 180;
        const cx = x0 - rx * Math.cos(st);
        const cy = y0 - ry * Math.sin(st);
        const x1 = cx + rx * Math.cos(st + sw);
        const y1p = cy + ry * Math.sin(st + sw);
        const large = Math.abs(toDeg(swAng)) > 180 ? 1 : 0;
        const sweep = swAng >= 0 ? 1 : 0;
        return {
            cmd: `A${rx},${ry} 0 ${large},${sweep} ${x1},${y1p}`,
            x: x1,
            y: y1p
        };
    };
    let x = w;
    let y = h;
    const aTop = arcFrom(x, y, wd2, y1, 5400000, 5400000);
    x = aTop.x;
    y = aTop.y;
    const aMid1 = arcFrom(hc, y4, wd2, y1, 0, -5400000);
    const aMid2 = arcFrom(aMid1.x, aMid1.y, wd2, y1, 5400000, -5400000);
    const aBot = arcFrom(hc, y1, wd2, y1, 10800000, 5400000);
    return [
        `M${w},${h}`,
        aTop.cmd,
        `L${hc},${y4}`,
        aMid1.cmd,
        aMid2.cmd,
        `L${hc},${y1}`,
        aBot.cmd
    ].join(' ');
});
presetShapes.set('rightBrace', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const a2 = Math.max(0, Math.min(adjustments?.get('adj2') ?? 50000, 100000));
    const q1 = 100000 - a2;
    const q2 = Math.min(q1, a2);
    const q3 = q2 / 2;
    const maxAdj1 = ss > 0 ? q3 * h / ss : 0;
    const a1 = Math.max(0, Math.min(adjustments?.get('adj1') ?? 8333, maxAdj1));
    const y1 = ss * a1 / 100000;
    const y3 = h * a2 / 100000;
    const y2 = y3 - y1;
    const y4 = h - y1;
    const wd2 = w / 2;
    const hc = w / 2;
    const toDeg = (ooxmlAng)=>ooxmlAng / 60000;
    const arcFrom = (x0, y0, rx, ry, stAng, swAng)=>{
        const st = toDeg(stAng) * Math.PI / 180;
        const sw = toDeg(swAng) * Math.PI / 180;
        const cx = x0 - rx * Math.cos(st);
        const cy = y0 - ry * Math.sin(st);
        const x1 = cx + rx * Math.cos(st + sw);
        const y1p = cy + ry * Math.sin(st + sw);
        const large = Math.abs(toDeg(swAng)) > 180 ? 1 : 0;
        const sweep = swAng >= 0 ? 1 : 0;
        return {
            cmd: `A${rx},${ry} 0 ${large},${sweep} ${x1},${y1p}`,
            x: x1,
            y: y1p
        };
    };
    const aTop = arcFrom(0, 0, wd2, y1, 16200000, 5400000);
    const aMid1 = arcFrom(hc, y2, wd2, y1, 10800000, -5400000);
    const aMid2 = arcFrom(aMid1.x, aMid1.y, wd2, y1, 16200000, -5400000);
    const aBot = arcFrom(hc, y4, wd2, y1, 0, 5400000);
    return [
        `M0,0`,
        aTop.cmd,
        `L${hc},${y2}`,
        aMid1.cmd,
        aMid2.cmd,
        `L${hc},${y4}`,
        aBot.cmd
    ].join(' ');
});
presetShapes.set('actionButtonBlank', (w, h)=>`M0,0 L${w},0 L${w},${h} L0,${h} Z`);
const actionButtonIcons = new Map();
actionButtonIcons.set('actionButtonForwardNext', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.3;
    return `M${cx - s * 0.5},${cy - s} L${cx + s},${cy} L${cx - s * 0.5},${cy + s} Z`;
});
actionButtonIcons.set('actionButtonBackPrevious', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.3;
    return `M${cx + s * 0.5},${cy - s} L${cx - s},${cy} L${cx + s * 0.5},${cy + s} Z`;
});
actionButtonIcons.set('actionButtonReturn', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.28;
    const thick = s * 0.22;
    const bottomY = cy + s * 0.4;
    const topY = cy - s * 0.4;
    const leftX = cx - s * 0.6;
    const rightX = cx + s * 0.6;
    const r = (bottomY - topY) / 2;
    return [
        `M${leftX},${bottomY}`,
        `L${rightX},${bottomY}`,
        `A${r},${r} 0 0,1 ${rightX},${topY}`,
        `L${leftX + s * 0.15},${topY}`,
        `L${leftX + s * 0.15},${topY + thick}`,
        `L${rightX - thick * 0.3},${topY + thick}`,
        `A${r - thick},${r - thick} 0 0,0 ${rightX - thick * 0.3},${bottomY - thick}`,
        `L${leftX},${bottomY - thick}`,
        `Z`,
        `M${leftX - s * 0.3},${topY + thick / 2}`,
        `L${leftX + s * 0.15},${topY - s * 0.2}`,
        `L${leftX + s * 0.15},${topY + thick + s * 0.2}`,
        `Z`
    ].join(' ');
});
actionButtonIcons.set('actionButtonBeginning', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.28;
    return [
        `M${cx - s},${cy - s} L${cx - s + s * 0.2},${cy - s} L${cx - s + s * 0.2},${cy + s} L${cx - s},${cy + s} Z`,
        `M${cx + s},${cy - s} L${cx - s + s * 0.35},${cy} L${cx + s},${cy + s} Z`
    ].join(' ');
});
actionButtonIcons.set('actionButtonEnd', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.28;
    return [
        `M${cx + s - s * 0.2},${cy - s} L${cx + s},${cy - s} L${cx + s},${cy + s} L${cx + s - s * 0.2},${cy + s} Z`,
        `M${cx - s},${cy - s} L${cx + s - s * 0.35},${cy} L${cx - s},${cy + s} Z`
    ].join(' ');
});
actionButtonIcons.set('actionButtonInformation', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.28;
    return [
        `M${cx - s * 0.1},${cy - s * 0.65} L${cx + s * 0.1},${cy - s * 0.65} L${cx + s * 0.1},${cy - s * 0.4} L${cx - s * 0.1},${cy - s * 0.4} Z`,
        `M${cx - s * 0.12},${cy - s * 0.2} L${cx + s * 0.12},${cy - s * 0.2} L${cx + s * 0.12},${cy + s * 0.65} L${cx - s * 0.12},${cy + s * 0.65} Z`
    ].join(' ');
});
actionButtonIcons.set('actionButtonDocument', (w, h)=>{
    const cx = w / 2, cy = h / 2, s = Math.min(w, h) * 0.28;
    const dx = s * 0.7, dy = s, fold = s * 0.3;
    return [
        `M${cx - dx},${cy - dy}`,
        `L${cx + dx - fold},${cy - dy} L${cx + dx},${cy - dy + fold}`,
        `L${cx + dx},${cy + dy} L${cx - dx},${cy + dy} Z`,
        `M${cx + dx - fold},${cy - dy} L${cx + dx - fold},${cy - dy + fold} L${cx + dx},${cy - dy + fold}`
    ].join(' ');
});
function getActionButtonIconPath(shapeType, w, h) {
    const key = shapeType.toLowerCase();
    const generator = actionButtonIcons.get(key) ?? actionButtonIcons.get(shapeType);
    return generator?.(w, h);
}
presetShapes.set('wave', (w, h, adjustments)=>{
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 12500), 0), 20000);
    const a2 = Math.min(Math.max(adjRaw(adjustments, 'adj2', 0), -10000), 10000);
    const y1 = h * a1 / 100000;
    const dy2 = y1 * 10 / 3;
    const y2 = y1 - dy2;
    const y3 = y1 + dy2;
    const y4 = h - y1;
    const y5 = y4 - dy2;
    const y6 = y4 + dy2;
    const of2 = w * a2 / 50000;
    const dx2 = of2 < 0 ? 0 : of2;
    const dx5 = of2 < 0 ? of2 : 0;
    const x2 = -dx2;
    const x5 = w - dx5;
    const dx3 = (x5 - x2) / 3;
    const x3 = x2 + dx3;
    const x4 = (x3 + x5) / 2;
    const x6 = dx5;
    const x10 = w + dx2;
    const x7 = x6 + (x10 - x6) / 3;
    const x8 = (x7 + x10) / 2;
    return [
        `M${x2},${y1}`,
        `C${x3},${y2} ${x4},${y3} ${x5},${y1}`,
        `L${x10},${y4}`,
        `C${x8},${y6} ${x7},${y5} ${x6},${y4}`,
        'Z'
    ].join(' ');
});
presetShapes.set('doubleWave', (w, h, adjustments)=>{
    const a1 = Math.min(Math.max(adjRaw(adjustments, 'adj1', 6250), 0), 12500);
    const a2 = Math.min(Math.max(adjRaw(adjustments, 'adj2', 0), -10000), 10000);
    const y1 = h * a1 / 100000;
    const dy2 = y1 * 10 / 3;
    const y2 = y1 - dy2;
    const y3 = y1 + dy2;
    const y4 = h - y1;
    const y5 = y4 - dy2;
    const y6 = y4 + dy2;
    const of2 = w * a2 / 50000;
    const dx2 = of2 < 0 ? 0 : of2;
    const dx8 = of2 < 0 ? of2 : 0;
    const x2 = -dx2;
    const x8 = w - dx8;
    const dx3 = (x8 - x2) / 6;
    const x3 = x2 + dx3;
    const dx4 = (x8 - x2) / 3;
    const x4 = x2 + dx4;
    const x5 = (x2 + x8) / 2;
    const x6 = x5 + dx3;
    const x7 = (x6 + x8) / 2;
    const x9 = dx8;
    const x15 = w + dx2;
    const dx3b = (x15 - x9) / 6;
    const x10 = x9 + dx3b;
    const x11 = x9 + (x15 - x9) / 3;
    const x12 = (x9 + x15) / 2;
    const x13 = x12 + dx3b;
    const x14 = (x13 + x15) / 2;
    return [
        `M${x2},${y1}`,
        `C${x3},${y2} ${x4},${y3} ${x5},${y1}`,
        `C${x6},${y2} ${x7},${y3} ${x8},${y1}`,
        `L${x15},${y4}`,
        `C${x14},${y6} ${x13},${y5} ${x12},${y4}`,
        `C${x11},${y6} ${x10},${y5} ${x9},${y4}`,
        'Z'
    ].join(' ');
});
presetShapes.set('irregularSeal1', (w, h)=>{
    const sx = (x)=>w * x / 21600;
    const sy = (y)=>h * y / 21600;
    return [
        `M${sx(10800)},${sy(5800)}`,
        `L${sx(14522)},0`,
        `L${sx(14155)},${sy(5325)}`,
        `L${sx(18380)},${sy(4457)}`,
        `L${sx(16702)},${sy(7315)}`,
        `L${sx(21097)},${sy(8137)}`,
        `L${sx(17607)},${sy(10475)}`,
        `L${sx(21600)},${sy(13290)}`,
        `L${sx(16837)},${sy(12942)}`,
        `L${sx(18145)},${sy(18095)}`,
        `L${sx(14020)},${sy(14457)}`,
        `L${sx(13247)},${sy(19737)}`,
        `L${sx(10532)},${sy(14935)}`,
        `L${sx(8485)},${sy(21600)}`,
        `L${sx(7715)},${sy(15627)}`,
        `L${sx(4762)},${sy(17617)}`,
        `L${sx(5667)},${sy(13937)}`,
        `L${sx(135)},${sy(14587)}`,
        `L${sx(3722)},${sy(11775)}`,
        `L0,${sy(8615)}`,
        `L${sx(4627)},${sy(7617)}`,
        `L${sx(370)},${sy(2295)}`,
        `L${sx(7312)},${sy(6320)}`,
        `L${sx(8352)},${sy(2295)}`,
        'Z'
    ].join(' ');
});
presetShapes.set('irregularSeal2', (w, h)=>{
    return [
        `M${w * 11462 / 21600},${h * 4342 / 21600}`,
        `L${w * 14790 / 21600},0`,
        `L${w * 14525 / 21600},${h * 5777 / 21600}`,
        `L${w * 18007 / 21600},${h * 3172 / 21600}`,
        `L${w * 16380 / 21600},${h * 6532 / 21600}`,
        `L${w},${h * 6645 / 21600}`,
        `L${w * 16985 / 21600},${h * 9402 / 21600}`,
        `L${w * 18270 / 21600},${h * 11290 / 21600}`,
        `L${w * 16380 / 21600},${h * 12310 / 21600}`,
        `L${w * 18877 / 21600},${h * 15632 / 21600}`,
        `L${w * 14640 / 21600},${h * 14350 / 21600}`,
        `L${w * 14942 / 21600},${h * 17370 / 21600}`,
        `L${w * 12180 / 21600},${h * 15935 / 21600}`,
        `L${w * 11612 / 21600},${h * 18842 / 21600}`,
        `L${w * 9872 / 21600},${h * 17370 / 21600}`,
        `L${w * 8700 / 21600},${h * 19712 / 21600}`,
        `L${w * 7527 / 21600},${h * 18125 / 21600}`,
        `L${w * 4917 / 21600},${h}`,
        `L${w * 4805 / 21600},${h * 18240 / 21600}`,
        `L${w * 1285 / 21600},${h * 17825 / 21600}`,
        `L${w * 3330 / 21600},${h * 15370 / 21600}`,
        `L0,${h * 12877 / 21600}`,
        `L${w * 3935 / 21600},${h * 11592 / 21600}`,
        `L${w * 1172 / 21600},${h * 8270 / 21600}`,
        `L${w * 5372 / 21600},${h * 7817 / 21600}`,
        `L${w * 4502 / 21600},${h * 3625 / 21600}`,
        `L${w * 8550 / 21600},${h * 6382 / 21600}`,
        `L${w * 9722 / 21600},${h * 1887 / 21600}`,
        'Z'
    ].join(' ');
});
presetShapes.set('teardrop', (w, h)=>{
    const rx = w / 2;
    const ry = h / 2;
    return [
        `M${w},${ry}`,
        `A${rx},${ry} 0 1,1 ${rx},0`,
        `L${w},0`,
        `L${w},${ry}`,
        'Z'
    ].join(' ');
});
presetShapes.set('pie', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 0;
    const adj2Raw = adjustments?.get('adj2') ?? 16200000;
    const startDeg = adj1Raw / 60000 % 360;
    const endDeg = adj2Raw / 60000 % 360;
    let sweepDeg = ((endDeg - startDeg) % 360 + 360) % 360;
    if (sweepDeg === 0 && startDeg !== endDeg) sweepDeg = 360;
    const rx = w / 2;
    const ry = h / 2;
    const toRad = (d)=>d * Math.PI / 180;
    const visualToParam = (deg)=>Math.atan2(Math.sin(toRad(deg)) / ry, Math.cos(toRad(deg)) / rx);
    const startParam = visualToParam(startDeg);
    const endParam = visualToParam(endDeg);
    const x1 = rx + rx * Math.cos(startParam);
    const y1 = ry + ry * Math.sin(startParam);
    const x2 = rx + rx * Math.cos(endParam);
    const y2 = ry + ry * Math.sin(endParam);
    const largeArc = sweepDeg > 180 ? 1 : 0;
    return [
        `M${rx},${ry}`,
        `L${x1},${y1}`,
        `A${rx},${ry} 0 ${largeArc},1 ${x2},${y2}`,
        'Z'
    ].join(' ');
});
presetShapes.set('pieWedge', (w, h)=>{
    return [
        `M0,${h}`,
        `A${w},${h} 0 0,1 ${w},0`,
        `L${w},${h}`,
        'Z'
    ].join(' ');
});
presetShapes.set('arc', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 16200000;
    const adj2Raw = adjustments?.get('adj2') ?? 0;
    const startDeg = adj1Raw / 60000;
    const endDeg = adj2Raw / 60000;
    const rx = w / 2;
    const ry = h / 2;
    const toRad = (d)=>d * Math.PI / 180;
    const visualToParam = (deg)=>Math.atan2(Math.sin(toRad(deg)) / ry, Math.cos(toRad(deg)) / rx);
    const startParam = visualToParam(startDeg);
    const endParam = visualToParam(endDeg);
    const x1 = rx + rx * Math.cos(startParam);
    const y1 = ry + ry * Math.sin(startParam);
    const x2 = rx + rx * Math.cos(endParam);
    const y2 = ry + ry * Math.sin(endParam);
    let sweepDeg = ((endDeg - startDeg) % 360 + 360) % 360;
    if (sweepDeg === 0 && startDeg !== endDeg) sweepDeg = 360;
    const largeArc = sweepDeg > 180 ? 1 : 0;
    return `M${x1},${y1} A${rx},${ry} 0 ${largeArc},1 ${x2},${y2}`;
});
presetShapes.set('chord', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 2700000;
    const adj2Raw = adjustments?.get('adj2') ?? 16200000;
    const startDeg = adj1Raw / 60000;
    const endDeg = adj2Raw / 60000;
    const cx = w / 2;
    const cy = h / 2;
    const rx = w / 2;
    const ry = h / 2;
    const toRad = (d)=>d * Math.PI / 180;
    const visualToParam = (deg)=>Math.atan2(Math.sin(toRad(deg)) / ry, Math.cos(toRad(deg)) / rx);
    const startParam = visualToParam(startDeg);
    const endParam = visualToParam(endDeg);
    const x1 = cx + rx * Math.cos(startParam);
    const y1 = cy + ry * Math.sin(startParam);
    const x2 = cx + rx * Math.cos(endParam);
    const y2 = cy + ry * Math.sin(endParam);
    let sweepDeg = ((endDeg - startDeg) % 360 + 360) % 360;
    if (sweepDeg === 0 && startDeg !== endDeg) sweepDeg = 360;
    if (sweepDeg === 0) {
        return `M${cx - rx},${cy} A${rx},${ry} 0 1,1 ${cx + rx},${cy} A${rx},${ry} 0 1,1 ${cx - rx},${cy} Z`;
    }
    const largeArc = sweepDeg > 180 ? 1 : 0;
    return `M${x1},${y1} A${rx},${ry} 0 ${largeArc},1 ${x2},${y2} Z`;
});
presetShapes.set('funnel', (w, h)=>{
    const ss = Math.min(w, h);
    const wd2 = w / 2;
    const hd4 = h / 4;
    const hc = w / 2;
    const b = h;
    const d = ss / 20;
    const rw2 = wd2 - d;
    const rh2 = hd4 - d;
    const ang8 = 8 * Math.PI / 180;
    const t1 = wd2 * Math.cos(ang8);
    const t2 = hd4 * Math.sin(ang8);
    const da = Math.atan2(t2, t1);
    const stAng1 = Math.PI - da;
    const swAng1 = Math.PI + 2 * da;
    const swAng3 = Math.PI - 2 * da;
    const rw3 = wd2 / 4;
    const rh3 = hd4 / 4;
    const ct1 = hd4 * Math.cos(stAng1);
    const st1 = wd2 * Math.sin(stAng1);
    const m1 = Math.sqrt(ct1 * ct1 + st1 * st1);
    const n1 = wd2 * hd4 / m1;
    const dx1 = n1 * Math.cos(stAng1);
    const dy1 = n1 * Math.sin(stAng1);
    const x1 = hc + dx1;
    const y1 = hd4 + dy1;
    const endAng1 = stAng1 + swAng1;
    const ct1e = hd4 * Math.cos(endAng1);
    const st1e = wd2 * Math.sin(endAng1);
    const m1e = Math.sqrt(ct1e * ct1e + st1e * st1e);
    const n1e = wd2 * hd4 / m1e;
    const dx1e = n1e * Math.cos(endAng1);
    const dy1e = n1e * Math.sin(endAng1);
    const x1e = hc + dx1e;
    const y1e = hd4 + dy1e;
    const vc3 = b - rh3;
    const ct3 = rh3 * Math.cos(da);
    const st3 = rw3 * Math.sin(da);
    const m3 = Math.sqrt(ct3 * ct3 + st3 * st3);
    const n3 = rw3 * rh3 / m3;
    const dx3 = n3 * Math.cos(da);
    const dy3 = n3 * Math.sin(da);
    const x3 = hc + dx3;
    const y2 = vc3 + dy3;
    const endAng3 = da + swAng3;
    const ct3e = rh3 * Math.cos(endAng3);
    const st3e = rw3 * Math.sin(endAng3);
    const m3e = Math.sqrt(ct3e * ct3e + st3e * st3e);
    const n3e = rw3 * rh3 / m3e;
    const dx3e = n3e * Math.cos(endAng3);
    const dy3e = n3e * Math.sin(endAng3);
    const x3e = hc + dx3e;
    const y2e = vc3 + dy3e;
    const swDeg1 = swAng1 * 180 / Math.PI;
    const largeArc1 = Math.abs(swDeg1) > 180 ? 1 : 0;
    const sweep1 = swAng1 > 0 ? 1 : 0;
    const swDeg3 = swAng3 * 180 / Math.PI;
    const largeArc3 = Math.abs(swDeg3) > 180 ? 1 : 0;
    const sweep3 = swAng3 > 0 ? 1 : 0;
    const body = [
        `M${x1},${y1}`,
        `A${wd2},${hd4} 0 ${largeArc1},${sweep1} ${x1e},${y1e}`,
        `L${x3},${y2}`,
        `A${rw3},${rh3} 0 ${largeArc3},${sweep3} ${x3e},${y2e}`,
        'Z'
    ].join(' ');
    const x2 = wd2 - rw2;
    const x2r = wd2 + rw2;
    const inset = [
        `M${x2},${hd4}`,
        `A${rw2},${rh2} 0 1,0 ${x2r},${hd4}`,
        `A${rw2},${rh2} 0 1,0 ${x2},${hd4}`,
        'Z'
    ].join(' ');
    return `${body} ${inset}`;
});
const presetOverlays = new Map();
presetOverlays.set('can', (w, h)=>{
    const ry = h * 0.1;
    const rx = w / 2;
    return [
        {
            path: [
                `M0,${ry}`,
                `A${rx},${ry} 0 0,1 ${w},${ry}`,
                `A${rx},${ry} 0 0,1 0,${ry}`,
                'Z'
            ].join(' '),
            fillModifier: 'lighten'
        }
    ];
});
function getPresetOverlays(shapeType, w, h, adjustments) {
    const key = shapeType.toLowerCase();
    const gen = presetOverlays.get(key) ?? presetOverlays.get(shapeType);
    return gen ? gen(w, h, adjustments) : [];
}
const multiPathPresets = new Map();
function _abGuides(w, h) {
    const ss = Math.min(w, h);
    const hc = w / 2, vc = h / 2;
    const dx2 = ss * 3 / 8;
    return {
        ss,
        hc,
        vc,
        dx2,
        g9: vc - dx2,
        g10: vc + dx2,
        g11: hc - dx2,
        g12: hc + dx2,
        g13: ss * 3 / 4
    };
}
const _rect = (w, h)=>`M0,0 L${w},0 L${w},${h} L0,${h} Z`;
multiPathPresets.set('actionButtonForwardNext', (w, h)=>{
    const { g9, g10, g11, g12, vc } = _abGuides(w, h);
    const tri = `M${g12},${vc} L${g11},${g9} L${g11},${g10} Z`;
    return [
        {
            d: `${_rect(w, h)} ${tri}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: tri,
            fill: 'darken',
            stroke: false
        },
        {
            d: tri,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonForward', (w, h)=>{
    const forwardNext = multiPathPresets.get('actionButtonForwardNext');
    return forwardNext ? forwardNext(w, h) : [];
});
multiPathPresets.set('actionButtonBackPrevious', (w, h)=>{
    const { g9, g10, g11, g12, vc } = _abGuides(w, h);
    const tri = `M${g11},${vc} L${g12},${g9} L${g12},${g10} Z`;
    return [
        {
            d: `${_rect(w, h)} ${tri}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: tri,
            fill: 'darken',
            stroke: false
        },
        {
            d: tri,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonBeginning', (w, h)=>{
    const { g9, g10, g11, g12, g13, vc } = _abGuides(w, h);
    const g14 = g13 / 8, g15 = g13 / 4;
    const g16 = g11 + g14, g17 = g11 + g15;
    const tri = `M${g17},${vc} L${g12},${g9} L${g12},${g10} Z`;
    const bar = `M${g16},${g9} L${g11},${g9} L${g11},${g10} L${g16},${g10} Z`;
    const icon = `${tri} ${bar}`;
    return [
        {
            d: `${_rect(w, h)} ${icon}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: icon,
            fill: 'darken',
            stroke: false
        },
        {
            d: icon,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonEnd', (w, h)=>{
    const { g9, g10, g11, g12, g13, vc } = _abGuides(w, h);
    const g14 = g13 * 3 / 4, g15 = g13 * 7 / 8;
    const g16 = g11 + g14, g17 = g11 + g15;
    const tri = `M${g16},${vc} L${g11},${g9} L${g11},${g10} Z`;
    const bar = `M${g17},${g9} L${g12},${g9} L${g12},${g10} L${g17},${g10} Z`;
    const icon = `${tri} ${bar}`;
    return [
        {
            d: `${_rect(w, h)} ${icon}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: icon,
            fill: 'darken',
            stroke: false
        },
        {
            d: icon,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonReturn', (w, h)=>{
    const { g9, g10, g11, g12, g13, hc, vc: _vcR } = _abGuides(w, h);
    const g14 = g13 * 7 / 8;
    const g15 = g13 * 3 / 4;
    const g16 = g13 * 5 / 8;
    const g17 = g13 * 3 / 8;
    const g18 = g13 / 4;
    const g27 = g13 / 8;
    const g19 = g9 + g15;
    const g20 = g9 + g16;
    const g21 = g9 + g18;
    const g22 = g11 + g14;
    const g23 = g11 + g15;
    const g24 = g11 + g16;
    const g25 = g11 + g17;
    const g26 = g11 + g18;
    const fillIcon = [
        `M${g12},${g21}`,
        `L${g23},${g9}`,
        `L${hc},${g21}`,
        `L${g24},${g21}`,
        `L${g24},${g20}`,
        `A${g27},${g27} 0 0,1 ${g24 - g27},${g19}`,
        `L${g25},${g19}`,
        `A${g27},${g27} 0 0,1 ${g26},${g20}`,
        `L${g26},${g21}`,
        `L${g11},${g21}`,
        `L${g11},${g20}`,
        `A${g17},${g17} 0 0,0 ${g25},${g10}`,
        `L${hc},${g10}`,
        `A${g17},${g17} 0 0,0 ${hc + g17},${g10 - g17}`,
        `L${g22},${g21}`,
        `Z`
    ].join(' ');
    const outline = [
        `M${g12},${g21}`,
        `L${g22},${g21}`,
        `L${g22},${g20}`,
        `A${g17},${g17} 0 0,1 ${g11 + g13 / 2},${g10}`,
        `L${g25},${g10}`,
        `A${g17},${g17} 0 0,1 ${g11},${g20}`,
        `L${g11},${g21}`,
        `L${g26},${g21}`,
        `L${g26},${g20}`,
        `A${g27},${g27} 0 0,0 ${g25},${g19}`,
        `L${hc},${g19}`,
        `A${g27},${g27} 0 0,0 ${g24},${g20}`,
        `L${g24},${g21}`,
        `L${hc},${g21}`,
        `L${g23},${g9}`,
        `Z`
    ].join(' ');
    return [
        {
            d: `${_rect(w, h)} ${fillIcon}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: fillIcon,
            fill: 'darken',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonSound', (w, h)=>{
    const { g9, g10, g11, g12, g13, hc: _hcS, vc } = _abGuides(w, h);
    const g14 = g13 / 8;
    const g15 = g13 * 5 / 16;
    const g16 = g13 * 5 / 8;
    const g17 = g13 * 11 / 16;
    const g18 = g13 * 3 / 4;
    const g19 = g13 * 7 / 8;
    const g20 = g9 + g14;
    const g21 = g9 + g15;
    const g22 = g9 + g17;
    const g23 = g9 + g19;
    const g24 = g11 + g15;
    const g25 = g11 + g16;
    const g26 = g11 + g18;
    const speaker = `M${g11},${g21} L${g11},${g22} L${g24},${g22} L${g25},${g10} L${g25},${g9} L${g24},${g21} Z`;
    const speakerOutline = `M${g11},${g21} L${g24},${g21} L${g25},${g9} L${g25},${g10} L${g24},${g22} L${g11},${g22} Z`;
    const waveLine1 = `M${g26},${g21} L${g12},${g20}`;
    const waveLine2 = `M${g26},${vc} L${g12},${vc}`;
    const waveLine3 = `M${g26},${g22} L${g12},${g23}`;
    const outlineWithWaves = `${speakerOutline} ${waveLine1} ${waveLine2} ${waveLine3}`;
    return [
        {
            d: `${_rect(w, h)} ${speaker}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: speaker,
            fill: 'darken',
            stroke: false
        },
        {
            d: outlineWithWaves,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonInformation', (w, h)=>{
    const { g9, g10, g11, g13, hc, vc: _vcI, dx2 } = _abGuides(w, h);
    const g14 = g13 / 32;
    const g17v = g13 * 5 / 16;
    const g18v = g13 * 3 / 8;
    const g19v = g13 * 13 / 32;
    const g20v = g13 * 19 / 32;
    const g22v = g13 * 11 / 16;
    const g23v = g13 * 13 / 16;
    const g24v = g13 * 7 / 8;
    const g38 = g13 * 3 / 32;
    const y25 = g9 + g14;
    const y28 = g9 + g17v;
    const y29 = g9 + g18v;
    const y30 = g9 + g23v;
    const y31 = g9 + g24v;
    const x32 = g11 + g17v;
    const x34 = g11 + g19v;
    const x35 = g11 + g20v;
    const x37 = g11 + g22v;
    const circle = `M${hc},${g9} A${dx2},${dx2} 0 1,1 ${hc},${g10} A${dx2},${dx2} 0 1,1 ${hc},${g9} Z`;
    const dot = `M${hc},${y25} A${g38},${g38} 0 1,1 ${hc},${y25 + g38 * 2} A${g38},${g38} 0 1,1 ${hc},${y25} Z`;
    const iBody = `M${x32},${y28} L${x37},${y28} L${x37},${y29} L${x35},${y29} L${x35},${y30} L${x37},${y30} L${x37},${y31} L${x32},${y31} L${x32},${y30} L${x34},${y30} L${x34},${y29} L${x32},${y29} Z`;
    const iconInner = `${dot} ${iBody}`;
    return [
        {
            d: `${_rect(w, h)} ${circle}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `${circle} ${iconInner}`,
            fill: 'darken',
            stroke: false
        },
        {
            d: iconInner,
            fill: 'lighten',
            stroke: false
        },
        {
            d: `${circle} ${iconInner}`,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonHome', (w, h)=>{
    const { g9, g10, g11, g12, g13, hc, vc } = _abGuides(w, h);
    const g14 = g13 / 16;
    const g15 = g13 / 8;
    const g16 = g13 * 3 / 16;
    const g17 = g13 * 5 / 16;
    const g18 = g13 * 7 / 16;
    const g19 = g13 * 9 / 16;
    const g20 = g13 * 11 / 16;
    const g21 = g13 * 3 / 4;
    const g22 = g13 * 13 / 16;
    const g23 = g13 * 7 / 8;
    const g24 = g9 + g14;
    const g25 = g9 + g16;
    const g26 = g9 + g17;
    const g27 = g9 + g21;
    const g28 = g11 + g15;
    const g29 = g11 + g18;
    const g30 = g11 + g19;
    const g31 = g11 + g20;
    const g32 = g11 + g22;
    const g33 = g11 + g23;
    const houseOutline = `M${hc},${g9} ` + `L${g11},${vc} L${g28},${vc} L${g28},${g10} L${g33},${g10} L${g33},${vc} L${g12},${vc} ` + `L${g32},${g26} L${g32},${g24} L${g31},${g24} L${g31},${g25} Z`;
    const chimney = `M${g32},${g26} L${g32},${g24} L${g31},${g24} L${g31},${g25} Z`;
    const walls = `M${g28},${vc} L${g28},${g10} L${g29},${g10} L${g29},${g27} L${g30},${g27} L${g30},${g10} L${g33},${g10} L${g33},${vc} Z`;
    const roof = `M${hc},${g9} L${g11},${vc} L${g12},${vc} Z`;
    const door = `M${g29},${g27} L${g30},${g27} L${g30},${g10} L${g29},${g10} Z`;
    const iconOutline = `M${hc},${g9} ` + `L${g31},${g25} L${g31},${g24} L${g32},${g24} L${g32},${g26} L${g12},${vc} ` + `L${g33},${vc} L${g33},${g10} L${g28},${g10} L${g28},${vc} L${g11},${vc} Z ` + `M${g31},${g25} L${g32},${g26} ` + `M${g33},${vc} L${g28},${vc} ` + `M${g29},${g10} L${g29},${g27} L${g30},${g27} L${g30},${g10}`;
    return [
        {
            d: `${_rect(w, h)} ${houseOutline}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `${chimney} ${walls}`,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: `${roof} ${door}`,
            fill: 'darken',
            stroke: false
        },
        {
            d: iconOutline,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonHelp', (w, h)=>{
    const { g9, g11, g13, hc, vc: _vcH } = _abGuides(w, h);
    const g14 = g13 / 7;
    const g15 = g13 * 3 / 14;
    const g16 = g13 * 2 / 7;
    const g19 = g13 * 3 / 7;
    const g20 = g13 * 4 / 7;
    const g21 = g13 * 17 / 28;
    const g23 = g13 * 21 / 28;
    const g24 = g13 * 11 / 14;
    const g41 = g13 / 14;
    const g42 = g13 * 3 / 28;
    const g27 = g9 + g16;
    const g29 = g9 + g21;
    const g30 = g9 + g23;
    const g31 = g9 + g24;
    const g33 = g11 + g15;
    const g36 = g11 + g19;
    const g37 = g11 + g20;
    const arcSeg = (curX, curY, wR, hR, stDeg, swDeg)=>{
        const stRad = stDeg * Math.PI / 180;
        const endRad = (stDeg + swDeg) * Math.PI / 180;
        const cx = curX - wR * Math.cos(stRad);
        const cy = curY - hR * Math.sin(stRad);
        const endX = cx + wR * Math.cos(endRad);
        const endY = cy + hR * Math.sin(endRad);
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        return {
            endX,
            endY,
            svg: `A${wR},${hR} 0 ${largeArc},${sweep} ${endX},${endY}`
        };
    };
    let cx = g33, cy = g27;
    const a1 = arcSeg(cx, cy, g16, g16, 180, 180);
    cx = a1.endX;
    cy = a1.endY;
    const a2 = arcSeg(cx, cy, g14, g15, 0, 90);
    cx = a2.endX;
    cy = a2.endY;
    const a3 = arcSeg(cx, cy, g41, g42, 270, -90);
    const a4 = arcSeg(g36, g29, g14, g15, 180, 90);
    const a5 = arcSeg(a4.endX, a4.endY, g41, g42, 90, -90);
    const a6 = arcSeg(a5.endX, a5.endY, g14, g14, 0, -180);
    const dot = `M${hc},${g31} A${g42},${g42} 0 1,1 ${hc},${g31 + g42 * 2} A${g42},${g42} 0 1,1 ${hc},${g31} Z`;
    const qMark = `M${g33},${g27} ` + `${a1.svg} ` + `${a2.svg} ` + `${a3.svg} ` + `L${g37},${g30} L${g36},${g30} L${g36},${g29} ` + `${a4.svg} ` + `${a5.svg} ` + `${a6.svg} Z`;
    const icon = `${qMark} ${dot}`;
    return [
        {
            d: `${_rect(w, h)} ${icon}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: icon,
            fill: 'darken',
            stroke: false
        },
        {
            d: icon,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonDocument', (w, h)=>{
    const ss = Math.min(w, h);
    const hc = w / 2, vc = h / 2;
    const dx2 = ss * 3 / 8;
    const dx1 = ss * 9 / 32;
    const g9 = vc - dx2, g10 = vc + dx2;
    const g11 = hc - dx1, g12 = hc + dx1;
    const g13 = ss * 3 / 16;
    const g14 = g12 - g13;
    const g15 = g9 + g13;
    const doc = `M${g11},${g9} L${g14},${g9} L${g12},${g15} L${g12},${g10} L${g11},${g10} Z`;
    const fold = `M${g14},${g9} L${g14},${g15} L${g12},${g15} Z`;
    const outline = `${doc} M${g12},${g15} L${g14},${g15} L${g14},${g9}`;
    return [
        {
            d: `${_rect(w, h)} ${doc}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: doc,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: fold,
            fill: 'darken',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('actionButtonMovie', (w, h)=>{
    const { g9, g11, g12, g13 } = _abGuides(w, h);
    const g14 = g13 * 1455 / 21600;
    const g15 = g13 * 1905 / 21600;
    const g16 = g13 * 2325 / 21600;
    const g17 = g13 * 16155 / 21600;
    const g18 = g13 * 17010 / 21600;
    const g19 = g13 * 19335 / 21600;
    const g20 = g13 * 19725 / 21600;
    const g21 = g13 * 20595 / 21600;
    const g22 = g13 * 5280 / 21600;
    const g23 = g13 * 5730 / 21600;
    const g24 = g13 * 6630 / 21600;
    const g25 = g13 * 7492 / 21600;
    const g26 = g13 * 9067 / 21600;
    const g27 = g13 * 9555 / 21600;
    const g28 = g13 * 13342 / 21600;
    const g29 = g13 * 14580 / 21600;
    const g30 = g13 * 15592 / 21600;
    const x31 = g11 + g14;
    const x32 = g11 + g15;
    const x33 = g11 + g16;
    const x34 = g11 + g17;
    const x35 = g11 + g18;
    const x36 = g11 + g19;
    const x37 = g11 + g20;
    const x38 = g11 + g21;
    const y39 = g9 + g22;
    const y40 = g9 + g23;
    const y41 = g9 + g24;
    const y42 = g9 + g25;
    const y43 = g9 + g26;
    const y44 = g9 + g27;
    const y45 = g9 + g28;
    const y46 = g9 + g29;
    const y47 = g9 + g30;
    const icon = [
        `M${g11},${y39}`,
        `L${g11},${y44}`,
        `L${x31},${y44}`,
        `L${x32},${y43}`,
        `L${x33},${y43}`,
        `L${x33},${y47}`,
        `L${x35},${y47}`,
        `L${x35},${y45}`,
        `L${x36},${y45}`,
        `L${x38},${y46}`,
        `L${g12},${y46}`,
        `L${g12},${y41}`,
        `L${x38},${y41}`,
        `L${x37},${y42}`,
        `L${x35},${y42}`,
        `L${x35},${y41}`,
        `L${x34},${y40}`,
        `L${x32},${y40}`,
        `L${x31},${y39}`,
        `Z`
    ].join(' ');
    return [
        {
            d: `${_rect(w, h)} ${icon}`,
            fill: 'norm',
            stroke: false
        },
        {
            d: icon,
            fill: 'darken',
            stroke: false
        },
        {
            d: icon,
            fill: 'none',
            stroke: true
        },
        {
            d: _rect(w, h),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('flowChartOfflineStorage', (w, h)=>{
    const tri = `M0,0 L${w},0 L${w / 2},${h} Z`;
    const lineY = h * 4 / 5;
    const line = `M${w * 2 / 5},${lineY} L${w * 3 / 5},${lineY}`;
    return [
        {
            d: tri,
            fill: 'norm',
            stroke: false
        },
        {
            d: line,
            fill: 'none',
            stroke: true
        },
        {
            d: tri,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('cube', (w, h, adjustments)=>{
    const a = Math.min(Math.max(adj(adjustments, 'adj', 25000), 0), 0.45);
    const depth = Math.min(w, h) * a;
    const front = [
        `M0,${depth}`,
        `L${w - depth},${depth}`,
        `L${w - depth},${h}`,
        `L0,${h}`,
        'Z'
    ].join(' ');
    const top = [
        `M0,${depth}`,
        `L${depth},0`,
        `L${w},0`,
        `L${w - depth},${depth}`,
        'Z'
    ].join(' ');
    const right = [
        `M${w - depth},${depth}`,
        `L${w},0`,
        `L${w},${h - depth}`,
        `L${w - depth},${h}`,
        'Z'
    ].join(' ');
    return [
        {
            d: front,
            fill: 'norm',
            stroke: true
        },
        {
            d: top,
            fill: 'lightenLess',
            stroke: true
        },
        {
            d: right,
            fill: 'darkenLess',
            stroke: true
        }
    ];
});
multiPathPresets.set('bevel', (w, h, adjustments)=>{
    const a = Math.min(Math.max(adj(adjustments, 'adj', 12500), 0), 0.45);
    const t = Math.min(w, h) * a;
    const inner = `M${t},${t} L${w - t},${t} L${w - t},${h - t} L${t},${h - t} Z`;
    const top = `M0,0 L${w},0 L${w - t},${t} L${t},${t} Z`;
    const bottom = `M0,${h} L${t},${h - t} L${w - t},${h - t} L${w},${h} Z`;
    const left = `M0,0 L${t},${t} L${t},${h - t} L0,${h} Z`;
    const right = `M${w},0 L${w},${h} L${w - t},${h - t} L${w - t},${t} Z`;
    return [
        {
            d: inner,
            fill: 'norm',
            stroke: true
        },
        {
            d: top,
            fill: 'lightenLess',
            stroke: true
        },
        {
            d: right,
            fill: 'darken',
            stroke: true
        },
        {
            d: bottom,
            fill: 'darken',
            stroke: true
        },
        {
            d: left,
            fill: 'lighten',
            stroke: true
        }
    ];
});
multiPathPresets.set('leftRightRibbon', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const wd2 = w / 2;
    const wd32 = w / 32;
    const hc = w / 2;
    const vc = h / 2;
    const a3 = Math.min(Math.max((adjustments?.get('adj3') ?? 16667) / 100000, 0), 0.33333);
    const maxAdj1 = 1 - a3;
    const a1 = Math.min(Math.max((adjustments?.get('adj1') ?? 50000) / 100000, 0), maxAdj1);
    const w1 = wd2 - wd32;
    const maxAdj2 = w1 / ss;
    const a2 = Math.min(Math.max((adjustments?.get('adj2') ?? 50000) / 100000, 0), maxAdj2);
    const x1 = ss * a2;
    const x4 = w - x1;
    const dy1 = h * a1 / 2;
    const dy2 = -h * a3 / 2;
    const ly1 = vc + dy2 - dy1;
    const ry4 = vc + dy1 - dy2;
    const ly2 = ly1 + dy1;
    const ry3 = h - ly2;
    const ly4 = ly2 * 2;
    const ry1 = h - ly4;
    const ly3 = ly4 - ly1;
    const ry2 = h - ly3;
    const hR = a3 * ss / 4;
    const x2 = hc - wd32;
    const x3 = hc + wd32;
    const y1 = ly1 + hR;
    const y2 = ry2 - hR;
    const arcTo = (curX, curY, wR, hRad, stDeg, swDeg)=>{
        const stRad = stDeg * Math.PI / 180;
        const endRad = (stDeg + swDeg) * Math.PI / 180;
        const cx = curX - wR * Math.cos(stRad);
        const cy = curY - hRad * Math.sin(stRad);
        const endX = cx + wR * Math.cos(endRad);
        const endY = cy + hRad * Math.sin(endRad);
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        return {
            endX,
            endY,
            svg: `A${wR},${hRad} 0 ${largeArc},${sweep} ${endX},${endY}`
        };
    };
    const cx1 = hc, cy1 = ly1;
    const arc1a = arcTo(cx1, cy1, wd32, hR, 270, 180);
    const arc1b = arcTo(arc1a.endX, arc1a.endY, wd32, hR, 270, -180);
    const cx1c = hc, cy1c = ry4;
    const arc1c = arcTo(cx1c, cy1c, wd32, hR, 90, 90);
    const body = [
        `M0,${ly2}`,
        `L${x1},0`,
        `L${x1},${ly1}`,
        `L${hc},${ly1}`,
        arc1a.svg,
        arc1b.svg,
        `L${x4},${ry2}`,
        `L${x4},${ry1}`,
        `L${w},${ry3}`,
        `L${x4},${h}`,
        `L${x4},${ry4}`,
        `L${hc},${ry4}`,
        arc1c.svg,
        `L${x2},${ly3}`,
        `L${x1},${ly3}`,
        `L${x1},${ly4}`,
        'Z'
    ].join(' ');
    const arc2a = arcTo(x3, y1, wd32, hR, 0, 90);
    const arc2b = arcTo(arc2a.endX, arc2a.endY, wd32, hR, 270, -180);
    const shadow = [
        `M${x3},${y1}`,
        arc2a.svg,
        arc2b.svg,
        `L${x3},${ry2}`,
        'Z'
    ].join(' ');
    const outline = [
        body,
        `M${x3},${y1} L${x3},${ry2}`,
        `M${x2},${y2} L${x2},${ly3}`
    ].join(' ');
    return [
        {
            d: body,
            fill: 'norm',
            stroke: false
        },
        {
            d: shadow,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('ellipseRibbon', (w, h, adjustments)=>{
    const adj1 = adjustments?.get('adj1') ?? 25000;
    const adj2 = adjustments?.get('adj2') ?? 50000;
    const adj3 = adjustments?.get('adj3') ?? 12500;
    const a1 = Math.max(0, Math.min(adj1, 100000));
    const a2 = Math.max(25000, Math.min(adj2, 75000));
    const q10 = 100000 - a1;
    const q11 = q10 / 2;
    const q12 = a1 - q11;
    const minAdj3 = Math.max(0, q12);
    const a3 = Math.max(minAdj3, Math.min(adj3, a1));
    const dx2 = w * a2 / 200000;
    const x2 = w / 2 - dx2;
    const x3 = x2 + w / 8;
    const x4 = w - x3;
    const x5 = w - x2;
    const x6 = w - w / 8;
    const dy1 = h * a3 / 100000;
    const f1 = w > 0 ? 4 * dy1 / w : 0;
    const parab = (x)=>f1 * (x - x * x / w);
    const y1 = parab(x3);
    const cx1 = x3 / 2;
    const cy1 = f1 * cx1;
    const cx2 = w - cx1;
    const q1 = h * a1 / 100000;
    const dy3 = q1 - dy1;
    const q5 = parab(x2);
    const y3 = q5 + dy3;
    const q6 = dy1 + dy3 - y3;
    const q7 = q6 + dy1;
    const cy3 = q7 + dy3;
    const rh = h - q1;
    const q8 = dy1 * 14 / 16;
    const y2 = (q8 + rh) / 2;
    const y5 = q5 + rh;
    const y6 = y3 + rh;
    const cx4 = x2 / 2;
    const cy4 = f1 * cx4 + rh;
    const cx5 = w - cx4;
    const cy6 = cy3 + rh;
    const y7 = y1 + dy3;
    const cy7 = q1 + q1 - y7;
    const hc = w / 2;
    const wd8 = w / 8;
    const body = [
        `M0,0`,
        `Q${cx1},${cy1} ${x3},${y1}`,
        `L${x2},${y3}`,
        `Q${hc},${cy3} ${x5},${y3}`,
        `L${x4},${y1}`,
        `Q${cx2},${cy1} ${w},0`,
        `L${x6},${y2}`,
        `L${w},${rh}`,
        `Q${cx5},${cy4} ${x5},${y5}`,
        `L${x5},${y6}`,
        `Q${hc},${cy6} ${x2},${y6}`,
        `L${x2},${y5}`,
        `Q${cx4},${cy4} 0,${rh}`,
        `L${wd8},${y2}`,
        `Z`
    ].join(' ');
    const shadow = [
        `M${x3},${y7}`,
        `L${x3},${y1}`,
        `L${x2},${y3}`,
        `Q${hc},${cy3} ${x5},${y3}`,
        `L${x4},${y1}`,
        `L${x4},${y7}`,
        `Q${hc},${cy7} ${x3},${y7}`,
        `Z`
    ].join(' ');
    const outline = [
        `M0,0`,
        `Q${cx1},${cy1} ${x3},${y1}`,
        `L${x2},${y3}`,
        `Q${hc},${cy3} ${x5},${y3}`,
        `L${x4},${y1}`,
        `Q${cx2},${cy1} ${w},0`,
        `L${x6},${y2}`,
        `L${w},${rh}`,
        `Q${cx5},${cy4} ${x5},${y5}`,
        `L${x5},${y6}`,
        `Q${hc},${cy6} ${x2},${y6}`,
        `L${x2},${y5}`,
        `Q${cx4},${cy4} 0,${rh}`,
        `L${wd8},${y2}`,
        `Z`,
        `M${x2},${y5} L${x2},${y3}`,
        `M${x5},${y3} L${x5},${y5}`,
        `M${x3},${y1} L${x3},${y7}`,
        `M${x4},${y7} L${x4},${y1}`
    ].join(' ');
    return [
        {
            d: body,
            fill: 'norm',
            stroke: false
        },
        {
            d: shadow,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('ellipseRibbon2', (w, h, adjustments)=>{
    const adj1 = adjustments?.get('adj1') ?? 25000;
    const adj2 = adjustments?.get('adj2') ?? 50000;
    const adj3 = adjustments?.get('adj3') ?? 12500;
    const a1 = Math.max(0, Math.min(adj1, 100000));
    const a2 = Math.max(25000, Math.min(adj2, 75000));
    const q10 = 100000 - a1;
    const q11 = q10 / 2;
    const q12 = a1 - q11;
    const minAdj3 = Math.max(0, q12);
    const a3 = Math.max(minAdj3, Math.min(adj3, a1));
    const b = h;
    const dx2 = w * a2 / 200000;
    const x2 = w / 2 - dx2;
    const x3 = x2 + w / 8;
    const x4 = w - x3;
    const x5 = w - x2;
    const x6 = w - w / 8;
    const dy1 = h * a3 / 100000;
    const f1 = w > 0 ? 4 * dy1 / w : 0;
    const u1 = f1 * (x3 - x3 * x3 / w);
    const y1 = b - u1;
    const cx1 = x3 / 2;
    const cu1 = f1 * cx1;
    const cy1 = b - cu1;
    const cx2 = w - cx1;
    const q1 = h * a1 / 100000;
    const dy3 = q1 - dy1;
    const q5 = f1 * (x2 - x2 * x2 / w);
    const u3 = q5 + dy3;
    const y3 = b - u3;
    const q6 = dy1 + dy3 - u3;
    const q7 = q6 + dy1;
    const cu3 = q7 + dy3;
    const cy3 = b - cu3;
    const rh = b - q1;
    const q8 = dy1 * 14 / 16;
    const u2 = (q8 + rh) / 2;
    const y2 = b - u2;
    const u5 = q5 + rh;
    const y5 = b - u5;
    const u6 = u3 + rh;
    const y6 = b - u6;
    const cx4 = x2 / 2;
    const cu4 = f1 * cx4 + rh;
    const cy4 = b - cu4;
    const cx5 = w - cx4;
    const cu6 = cu3 + rh;
    const cy6 = b - cu6;
    const u7 = u1 + dy3;
    const y7 = b - u7;
    const cu7 = q1 + q1 - u7;
    const cy7 = b - cu7;
    const hc = w / 2;
    const wd8 = w / 8;
    const body = [
        `M0,${b}`,
        `Q${cx1},${cy1} ${x3},${y1}`,
        `L${x2},${y3}`,
        `Q${hc},${cy3} ${x5},${y3}`,
        `L${x4},${y1}`,
        `Q${cx2},${cy1} ${w},${b}`,
        `L${x6},${y2}`,
        `L${w},${q1}`,
        `Q${cx5},${cy4} ${x5},${y5}`,
        `L${x5},${y6}`,
        `Q${hc},${cy6} ${x2},${y6}`,
        `L${x2},${y5}`,
        `Q${cx4},${cy4} 0,${q1}`,
        `L${wd8},${y2}`,
        `Z`
    ].join(' ');
    const shadow = [
        `M${x3},${y7}`,
        `L${x3},${y1}`,
        `L${x2},${y3}`,
        `Q${hc},${cy3} ${x5},${y3}`,
        `L${x4},${y1}`,
        `L${x4},${y7}`,
        `Q${hc},${cy7} ${x3},${y7}`,
        `Z`
    ].join(' ');
    const outline = [
        `M0,${b}`,
        `L${wd8},${y2}`,
        `L0,${q1}`,
        `Q${cx4},${cy4} ${x2},${y5}`,
        `L${x2},${y6}`,
        `Q${hc},${cy6} ${x5},${y6}`,
        `L${x5},${y5}`,
        `Q${cx5},${cy4} ${w},${q1}`,
        `L${x6},${y2}`,
        `L${w},${b}`,
        `Q${cx2},${cy1} ${x4},${y1}`,
        `L${x5},${y3}`,
        `Q${hc},${cy3} ${x2},${y3}`,
        `L${x3},${y1}`,
        `Q${cx1},${cy1} 0,${b}`,
        `Z`,
        `M${x2},${y3} L${x2},${y5}`,
        `M${x5},${y5} L${x5},${y3}`,
        `M${x3},${y7} L${x3},${y1}`,
        `M${x4},${y1} L${x4},${y7}`
    ].join(' ');
    return [
        {
            d: body,
            fill: 'norm',
            stroke: false
        },
        {
            d: shadow,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('smileyFace', (w, h, adjustments)=>{
    const wd2 = w / 2;
    const hd2 = h / 2;
    const hc = w / 2;
    const vc = h / 2;
    const rawAdj = adjustments?.get('adj') ?? 4653;
    const a = Math.max(-4653, Math.min(rawAdj, 4653));
    const x2 = w * 6215 / 21600;
    const x3 = w * 13135 / 21600;
    const y1 = h * 7570 / 21600;
    const wR = w * 1125 / 21600;
    const hR = h * 1125 / 21600;
    const x1 = w * 4969 / 21699;
    const x4 = w * 16640 / 21600;
    const y3 = h * 16515 / 21600;
    const dy2 = h * a / 100000;
    const y2 = y3 - dy2;
    const y4 = y3 + dy2;
    const dy3 = h * a / 50000;
    const y5 = y4 + dy3;
    const face = `M${w},${vc} A${wd2},${hd2} 0 1,1 0,${vc} A${wd2},${hd2} 0 1,1 ${w},${vc} Z`;
    const leftEye = `M${(x2 + wR).toFixed(2)},${y1.toFixed(2)} A${wR.toFixed(2)},${hR.toFixed(2)} 0 1,1 ${(x2 - wR).toFixed(2)},${y1.toFixed(2)} A${wR.toFixed(2)},${hR.toFixed(2)} 0 1,1 ${(x2 + wR).toFixed(2)},${y1.toFixed(2)} Z`;
    const rightEye = `M${(x3 + wR).toFixed(2)},${y1.toFixed(2)} A${wR.toFixed(2)},${hR.toFixed(2)} 0 1,1 ${(x3 - wR).toFixed(2)},${y1.toFixed(2)} A${wR.toFixed(2)},${hR.toFixed(2)} 0 1,1 ${(x3 + wR).toFixed(2)},${y1.toFixed(2)} Z`;
    const smile = `M${x1.toFixed(2)},${y2.toFixed(2)} Q${hc.toFixed(2)},${y5.toFixed(2)} ${x4.toFixed(2)},${y2.toFixed(2)}`;
    const outline = `M${w},${vc} A${wd2},${hd2} 0 1,1 0,${vc} A${wd2},${hd2} 0 1,1 ${w},${vc} Z`;
    return [
        {
            d: face,
            fill: 'norm',
            stroke: false
        },
        {
            d: `${leftEye} ${rightEye}`,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: smile,
            fill: 'none',
            stroke: true
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('foldedCorner', (w, h, adjustments)=>{
    const a = adj(adjustments, 'adj', 16667);
    const fold = Math.min(w, h) * a * 0.7;
    const body = `M0,0 L${w},0 L${w},${h - fold} L${w - fold},${h} L0,${h} Z`;
    const foldFace = `M${w - fold},${h} L${w - fold},${h - fold} L${w},${h - fold} Z`;
    const crease = `M${w - fold},${h} L${w - fold},${h - fold}`;
    return [
        {
            d: body,
            fill: 'norm',
            stroke: true
        },
        {
            d: foldFace,
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: crease,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('can', (w, h, adjustments)=>{
    const ss = Math.min(w, h);
    const maxAdj = 50000 * h / ss;
    const a = Math.min(Math.max(adjustments?.get('adj') ?? 25000, 0), maxAdj);
    const y1 = ss * a / 200000;
    const y3 = h - y1;
    const wd2 = w / 2;
    const arcSeg = (curX, curY, wR, hR, stDeg, swDeg)=>{
        const stRad = stDeg * Math.PI / 180;
        const endRad = (stDeg + swDeg) * Math.PI / 180;
        const cx = curX - wR * Math.cos(stRad);
        const cy = curY - hR * Math.sin(stRad);
        const endX = cx + wR * Math.cos(endRad);
        const endY = cy + hR * Math.sin(endRad);
        const largeArc = Math.abs(swDeg) > 180 ? 1 : 0;
        const sweep = swDeg > 0 ? 1 : 0;
        return {
            endX,
            endY,
            svg: `A${wR},${hR} 0 ${largeArc},${sweep} ${endX},${endY}`
        };
    };
    const a1 = arcSeg(0, y1, wd2, y1, 180, -180);
    const a2 = arcSeg(w, y3, wd2, y1, 0, 180);
    const body = `M0,${y1} ${a1.svg} L${w},${y3} ${a2.svg} Z`;
    const a3 = arcSeg(0, y1, wd2, y1, 180, 180);
    const a4 = arcSeg(a3.endX, a3.endY, wd2, y1, 0, 180);
    const topFace = `M0,${y1} ${a3.svg} ${a4.svg} Z`;
    const a5 = arcSeg(w, y1, wd2, y1, 0, 180);
    const a6 = arcSeg(a5.endX, a5.endY, wd2, y1, 180, 180);
    const a7 = arcSeg(w, y3, wd2, y1, 0, 180);
    const outline = `M${w},${y1} ${a5.svg} ${a6.svg} L${w},${y3} ${a7.svg} L0,${y1}`;
    return [
        {
            d: body,
            fill: 'norm',
            stroke: false
        },
        {
            d: topFace,
            fill: 'lighten',
            stroke: false
        },
        {
            d: outline,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('curvedrightarrow', (w, h, adjustments)=>buildCurvedArrowMultiPath('curvedRightArrow', w, h, adjustments));
multiPathPresets.set('curvedleftarrow', (w, h, adjustments)=>buildCurvedArrowMultiPath('curvedLeftArrow', w, h, adjustments));
multiPathPresets.set('curveduparrow', (w, h, adjustments)=>buildCurvedVerticalArrowMultiPath('curvedUpArrow', w, h, adjustments));
multiPathPresets.set('curveddownarrow', (w, h, adjustments)=>buildCurvedVerticalArrowMultiPath('curvedDownArrow', w, h, adjustments));
multiPathPresets.set('bordercallout1', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 112500) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -38333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentcallout1', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 112500) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -38333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentcallout2', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 112500) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -46667) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentcallout3', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 100000) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -16667) / 100000;
    const y4 = h * (adjustments?.get('adj7') ?? 112963) / 100000;
    const x4 = w * (adjustments?.get('adj8') ?? -8333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3} L${x4},${y4}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('callout1', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 112500) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -38333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},${y1} L${x2},${y2}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('callout2', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 112500) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -46667) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('callout3', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 100000) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -16667) / 100000;
    const y4 = h * (adjustments?.get('adj7') ?? 112963) / 100000;
    const x4 = w * (adjustments?.get('adj8') ?? -8333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3} L${x4},${y4}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('bordercallout2', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 112500) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -46667) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('bordercallout3', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 100000) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -16667) / 100000;
    const y4 = h * (adjustments?.get('adj7') ?? 112963) / 100000;
    const x4 = w * (adjustments?.get('adj8') ?? -8333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3} L${x4},${y4}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentbordercallout1', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 112500) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -38333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentbordercallout2', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 112500) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -46667) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('accentbordercallout3', (w, h, adjustments)=>{
    const y1 = h * (adjustments?.get('adj1') ?? 18750) / 100000;
    const x1 = w * (adjustments?.get('adj2') ?? -8333) / 100000;
    const y2 = h * (adjustments?.get('adj3') ?? 18750) / 100000;
    const x2 = w * (adjustments?.get('adj4') ?? -16667) / 100000;
    const y3 = h * (adjustments?.get('adj5') ?? 100000) / 100000;
    const x3 = w * (adjustments?.get('adj6') ?? -16667) / 100000;
    const y4 = h * (adjustments?.get('adj7') ?? 112963) / 100000;
    const x4 = w * (adjustments?.get('adj8') ?? -8333) / 100000;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: true
        },
        {
            d: `M${x1},0 L${x1},${h}`,
            fill: 'none',
            stroke: true
        },
        {
            d: `M${x1},${y1} L${x2},${y2} L${x3},${y3} L${x4},${y4}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('chartx', (w, h)=>{
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M0,0 L${w},${h} M${w},0 L0,${h}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('chartplus', (w, h)=>{
    const cx = w / 2;
    const cy = h / 2;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M${cx},0 L${cx},${h} M0,${cy} L${w},${cy}`,
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('chartstar', (w, h)=>{
    const cx = w / 2;
    return [
        {
            d: `M0,0 L${w},0 L${w},${h} L0,${h} Z`,
            fill: 'norm',
            stroke: false
        },
        {
            d: `M0,0 L${w},${h} M${w},0 L0,${h} M${cx},0 L${cx},${h}`,
            fill: 'none',
            stroke: true
        }
    ];
});
function ooArcTo(curX, curY, wR, hR, stAngDeg, swAngDeg) {
    const stRad = stAngDeg * Math.PI / 180;
    const cx = curX - wR * Math.cos(stRad);
    const cy = curY - hR * Math.sin(stRad);
    const endRad = (stAngDeg + swAngDeg) * Math.PI / 180;
    const ex = cx + wR * Math.cos(endRad);
    const ey = cy + hR * Math.sin(endRad);
    const absSweep = Math.abs(swAngDeg);
    const largeArc = absSweep > 180 ? 1 : 0;
    const sweepFlag = swAngDeg >= 0 ? 1 : 0;
    return {
        svg: `A${wR},${hR} 0 ${largeArc},${sweepFlag} ${ex},${ey}`,
        x: ex,
        y: ey
    };
}
multiPathPresets.set('ribbon', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 16667;
    const adj2Raw = adjustments?.get('adj2') ?? 50000;
    const a1 = Math.min(Math.max(adj1Raw, 0), 33333);
    const a2 = Math.min(Math.max(adj2Raw, 25000), 75000);
    const hc = w / 2;
    const wd8 = w / 8;
    const wd32 = w / 32;
    const x10 = w - wd8;
    const dx2 = w * a2 / 200000;
    const x2 = hc - dx2;
    const x9 = hc + dx2;
    const x3 = x2 + wd32;
    const x8 = x9 - wd32;
    const x5 = x2 + wd8;
    const x6 = x9 - wd8;
    const x4 = x5 - wd32;
    const x7 = x6 + wd32;
    const y1 = h * a1 / 200000;
    const y2 = h * a1 / 100000;
    const y4 = h - y2;
    const y3 = y4 / 2;
    const hR = h * a1 / 400000;
    const y5 = h - hR;
    const y6 = y2 - hR;
    let cx, cy, arc;
    const p1 = [];
    cx = 0;
    cy = 0;
    p1.push(`M${0},${0}`);
    p1.push(`L${x4},${0}`);
    cx = x4;
    cy = 0;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x3},${y1}`);
    cx = x3;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x8},${y2}`);
    cx = x8;
    cy = y2;
    arc = ooArcTo(cx, cy, wd32, hR, 90, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x7},${y1}`);
    cx = x7;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${w},${0}`);
    p1.push(`L${x10},${y3}`);
    p1.push(`L${w},${y4}`);
    p1.push(`L${x9},${y4}`);
    p1.push(`L${x9},${y5}`);
    cx = x9;
    cy = y5;
    arc = ooArcTo(cx, cy, wd32, hR, 0, 90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x3},${h}`);
    cx = x3;
    cy = h;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x2},${y4}`);
    p1.push(`L${0},${y4}`);
    p1.push(`L${wd8},${y3}`);
    p1.push('Z');
    const p2 = [];
    cx = x5;
    cy = hR;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, wd32, hR, 0, 90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x3},${y1}`);
    cx = x3;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -180);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x5},${y2}`);
    p2.push('Z');
    cx = x6;
    cy = hR;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, wd32, hR, 180, -90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x8},${y1}`);
    cx = x8;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 180);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x6},${y2}`);
    p2.push('Z');
    const p3 = [];
    cx = 0;
    cy = 0;
    p3.push(`M${0},${0}`);
    p3.push(`L${x4},${0}`);
    cx = x4;
    cy = 0;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x3},${y1}`);
    cx = x3;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x8},${y2}`);
    cx = x8;
    cy = y2;
    arc = ooArcTo(cx, cy, wd32, hR, 90, -180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x7},${y1}`);
    cx = x7;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${w},${0}`);
    p3.push(`L${x10},${y3}`);
    p3.push(`L${w},${y4}`);
    p3.push(`L${x9},${y4}`);
    p3.push(`L${x9},${y5}`);
    cx = x9;
    cy = y5;
    arc = ooArcTo(cx, cy, wd32, hR, 0, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x3},${h}`);
    cx = x3;
    cy = h;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x2},${y4}`);
    p3.push(`L${0},${y4}`);
    p3.push(`L${wd8},${y3}`);
    p3.push('Z');
    p3.push(`M${x5},${hR} L${x5},${y2}`);
    p3.push(`M${x6},${y2} L${x6},${hR}`);
    p3.push(`M${x2},${y4} L${x2},${y6}`);
    p3.push(`M${x9},${y6} L${x9},${y4}`);
    return [
        {
            d: p1.join(' '),
            fill: 'norm',
            stroke: false
        },
        {
            d: p2.join(' '),
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: p3.join(' '),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('ribbon2', (w, h, adjustments)=>{
    const adj1Raw = adjustments?.get('adj1') ?? 16667;
    const adj2Raw = adjustments?.get('adj2') ?? 50000;
    const a1 = Math.min(Math.max(adj1Raw, 0), 33333);
    const a2 = Math.min(Math.max(adj2Raw, 25000), 75000);
    const hc = w / 2;
    const wd8 = w / 8;
    const wd32 = w / 32;
    const x10 = w - wd8;
    const dx2 = w * a2 / 200000;
    const x2 = hc - dx2;
    const x9 = hc + dx2;
    const x3 = x2 + wd32;
    const x8 = x9 - wd32;
    const x5 = x2 + wd8;
    const x6 = x9 - wd8;
    const x4 = x5 - wd32;
    const x7 = x6 + wd32;
    const dy1 = h * a1 / 200000;
    const y1 = h - dy1;
    const dy2 = h * a1 / 100000;
    const y2 = h - dy2;
    const y4 = dy2;
    const y3 = (y4 + h) / 2;
    const hR = h * a1 / 400000;
    const y6 = h - hR;
    const y7 = y1 - hR;
    let cx, cy, arc;
    const p1 = [];
    p1.push(`M${0},${h}`);
    p1.push(`L${x4},${h}`);
    cx = x4;
    cy = h;
    arc = ooArcTo(cx, cy, wd32, hR, 90, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x3},${y1}`);
    cx = x3;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x8},${y2}`);
    cx = x8;
    cy = y2;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x7},${y1}`);
    cx = x7;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${w},${h}`);
    p1.push(`L${x10},${y3}`);
    p1.push(`L${w},${y4}`);
    p1.push(`L${x9},${y4}`);
    p1.push(`L${x9},${hR}`);
    cx = x9;
    cy = hR;
    arc = ooArcTo(cx, cy, wd32, hR, 0, -90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x3},${0}`);
    cx = x3;
    cy = 0;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x2},${y4}`);
    p1.push(`L${0},${y4}`);
    p1.push(`L${wd8},${y3}`);
    p1.push('Z');
    const p2 = [];
    cx = x5;
    cy = y6;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, wd32, hR, 0, -90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x3},${y1}`);
    cx = x3;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 180);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x5},${y2}`);
    p2.push('Z');
    cx = x6;
    cy = y6;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, wd32, hR, 180, 90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x8},${y1}`);
    cx = x8;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, -180);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p2.push(`L${x6},${y2}`);
    p2.push('Z');
    const p3 = [];
    p3.push(`M${0},${h}`);
    p3.push(`L${wd8},${y3}`);
    p3.push(`L${0},${y4}`);
    p3.push(`L${x2},${y4}`);
    p3.push(`L${x2},${hR}`);
    cx = x2;
    cy = hR;
    arc = ooArcTo(cx, cy, wd32, hR, 180, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x8},${0}`);
    cx = x8;
    cy = 0;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x9},${y4}`);
    p3.push(`L${w},${y4}`);
    p3.push(`L${x10},${y3}`);
    p3.push(`L${w},${h}`);
    p3.push(`L${x7},${h}`);
    cx = x7;
    cy = h;
    arc = ooArcTo(cx, cy, wd32, hR, 90, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x8},${y1}`);
    cx = x8;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 90, -180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x3},${y2}`);
    cx = x3;
    cy = y2;
    arc = ooArcTo(cx, cy, wd32, hR, 270, -180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x4},${y1}`);
    cx = x4;
    cy = y1;
    arc = ooArcTo(cx, cy, wd32, hR, 270, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push('Z');
    p3.push(`M${x5},${y2} L${x5},${y6}`);
    p3.push(`M${x6},${y6} L${x6},${y2}`);
    p3.push(`M${x2},${y7} L${x2},${y4}`);
    p3.push(`M${x9},${y4} L${x9},${y7}`);
    return [
        {
            d: p1.join(' '),
            fill: 'norm',
            stroke: false
        },
        {
            d: p2.join(' '),
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: p3.join(' '),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('horizontalscroll', (w, h, adjustments)=>{
    const adjVal = adjustments?.get('adj') ?? 12500;
    const a = Math.min(Math.max(adjVal, 0), 25000);
    const ss = Math.min(w, h);
    const ch = ss * a / 100000;
    const ch2 = ch / 2;
    const ch4 = ch / 4;
    const y3 = ch + ch2;
    const y4 = ch + ch;
    const y6 = h - ch;
    const y7 = h - ch2;
    const y5 = y6 - ch2;
    const x3 = w - ch;
    const x4 = w - ch2;
    const p1 = [];
    let cx, cy;
    cx = w;
    cy = ch2;
    p1.push(`M${cx},${cy}`);
    let arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x4},${ch2}`);
    arc = ooArcTo(x4, ch2, ch4, ch4, 0, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x3},${ch}`);
    p1.push(`L${ch2},${ch}`);
    cx = ch2;
    cy = ch;
    arc = ooArcTo(cx, cy, ch2, ch2, 270, -90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${0},${y7}`);
    cx = 0;
    cy = y7;
    arc = ooArcTo(cx, cy, ch2, ch2, 180, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${ch},${y6}`);
    p1.push(`L${x4},${y6}`);
    cx = x4;
    cy = y6;
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p1.push(arc.svg);
    p1.push('Z');
    cx = ch2;
    cy = y4;
    p1.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 0, -180);
    p1.push(arc.svg);
    p1.push('Z');
    const p2 = [];
    cx = ch2;
    cy = y4;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 0, -180);
    p2.push(arc.svg);
    p2.push('Z');
    cx = x4;
    cy = ch;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -270);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 180, -180);
    p2.push(arc.svg);
    p2.push('Z');
    const p3 = [];
    cx = 0;
    cy = y3;
    p3.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 180, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x3},${ch}`);
    p3.push(`L${x3},${ch2}`);
    cx = x3;
    cy = ch2;
    arc = ooArcTo(cx, cy, ch2, ch2, 180, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${w},${y5}`);
    cx = w;
    cy = y5;
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${ch},${y6}`);
    p3.push(`L${ch},${y7}`);
    cx = ch;
    cy = y7;
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 180);
    p3.push(arc.svg);
    p3.push('Z');
    p3.push(`M${x3},${ch}`);
    p3.push(`L${x4},${ch}`);
    cx = x4;
    cy = ch;
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p3.push(arc.svg);
    p3.push(`M${x4},${ch}`);
    p3.push(`L${x4},${ch2}`);
    cx = x4;
    cy = ch2;
    arc = ooArcTo(cx, cy, ch4, ch4, 0, 180);
    p3.push(arc.svg);
    p3.push(`M${ch2},${y4}`);
    p3.push(`L${ch2},${y3}`);
    cx = ch2;
    cy = y3;
    arc = ooArcTo(cx, cy, ch4, ch4, 180, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 180);
    p3.push(arc.svg);
    p3.push(`M${ch},${y3}`);
    p3.push(`L${ch},${y6}`);
    return [
        {
            d: p1.join(' '),
            fill: 'norm',
            stroke: false
        },
        {
            d: p2.join(' '),
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: p3.join(' '),
            fill: 'none',
            stroke: true
        }
    ];
});
multiPathPresets.set('verticalscroll', (w, h, adjustments)=>{
    const adjVal = adjustments?.get('adj') ?? 12500;
    const a = Math.min(Math.max(adjVal, 0), 25000);
    const ss = Math.min(w, h);
    const ch = ss * a / 100000;
    const ch2 = ch / 2;
    const ch4 = ch / 4;
    const x3 = ch + ch2;
    const x4 = ch + ch;
    const x6 = w - ch;
    const x7 = w - ch2;
    const _x5 = x6 - ch2;
    const y3 = h - ch;
    const y4 = h - ch2;
    const p1 = [];
    let cx, cy;
    cx = ch2;
    cy = h;
    p1.push(`M${cx},${cy}`);
    let arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${ch2},${y4}`);
    cx = ch2;
    cy = y4;
    arc = ooArcTo(cx, cy, ch4, ch4, 90, -180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${ch},${y3}`);
    p1.push(`L${ch},${ch2}`);
    cx = ch;
    cy = ch2;
    arc = ooArcTo(cx, cy, ch2, ch2, 180, 90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x7},${0}`);
    cx = x7;
    cy = 0;
    arc = ooArcTo(cx, cy, ch2, ch2, 270, 180);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p1.push(`L${x6},${ch}`);
    p1.push(`L${x6},${y4}`);
    cx = x6;
    cy = y4;
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p1.push(arc.svg);
    p1.push('Z');
    cx = x4;
    cy = ch2;
    p1.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p1.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 90, 180);
    p1.push(arc.svg);
    p1.push('Z');
    const p2 = [];
    cx = x4;
    cy = ch2;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 90, 180);
    p2.push(arc.svg);
    p2.push('Z');
    cx = ch;
    cy = y4;
    p2.push(`M${cx},${cy}`);
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 270);
    p2.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 270, 180);
    p2.push(arc.svg);
    p2.push('Z');
    const p3 = [];
    cx = ch;
    cy = y3;
    p3.push(`M${cx},${cy}`);
    p3.push(`L${ch},${ch2}`);
    cx = ch;
    cy = ch2;
    arc = ooArcTo(cx, cy, ch2, ch2, 180, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x7},${0}`);
    cx = x7;
    cy = 0;
    arc = ooArcTo(cx, cy, ch2, ch2, 270, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x6},${ch}`);
    p3.push(`L${x6},${y4}`);
    cx = x6;
    cy = y4;
    arc = ooArcTo(cx, cy, ch2, ch2, 0, 90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${ch2},${h}`);
    cx = ch2;
    cy = h;
    arc = ooArcTo(cx, cy, ch2, ch2, 90, 180);
    p3.push(arc.svg);
    p3.push('Z');
    p3.push(`M${x3},${0}`);
    cx = x3;
    cy = 0;
    arc = ooArcTo(cx, cy, ch2, ch2, 270, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    arc = ooArcTo(cx, cy, ch4, ch4, 90, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${x4},${ch2}`);
    p3.push(`M${x6},${ch}`);
    p3.push(`L${x3},${ch}`);
    p3.push(`M${ch2},${y3}`);
    cx = ch2;
    cy = y3;
    arc = ooArcTo(cx, cy, ch4, ch4, 270, 180);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${ch},${y4}`);
    p3.push(`M${ch2},${h}`);
    cx = ch2;
    cy = h;
    arc = ooArcTo(cx, cy, ch2, ch2, 90, -90);
    p3.push(arc.svg);
    cx = arc.x;
    cy = arc.y;
    p3.push(`L${ch},${y3}`);
    return [
        {
            d: p1.join(' '),
            fill: 'norm',
            stroke: false
        },
        {
            d: p2.join(' '),
            fill: 'darkenLess',
            stroke: false
        },
        {
            d: p3.join(' '),
            fill: 'none',
            stroke: true
        }
    ];
});
function getMultiPathPreset(shapeType, w, h, adjustments) {
    const key = shapeType.toLowerCase();
    const gen = multiPathPresets.get(key) ?? multiPathPresets.get(shapeType);
    return gen ? gen(w, h, adjustments) : null;
}
function getPresetShapePath(shapeType, w, h, adjustments) {
    if (shapeType === 'textNoShape' || shapeType.toLowerCase() === 'textnoshape') return '';
    const key = shapeType.toLowerCase();
    const generator = presetShapes.get(key) ?? presetShapes.get(shapeType);
    if (generator) {
        return generator(w, h, adjustments);
    }
    console.warn(`Unknown preset shape: "${shapeType}", falling back to rectangle`);
    return `M0,0 L${w},0 L${w},${h} L0,${h} Z`;
}

  global.mvipOfficePresetGeometry = Object.freeze({
    getPresetShapePath,
    getMultiPathPreset,
    getPresetOverlays,
    hasPreset(shapeType) {
      const raw = String(shapeType || '');
      const key = raw.toLowerCase();
      return presetShapes.has(key) || presetShapes.has(raw)
        || multiPathPresets.has(key) || multiPathPresets.has(raw);
    },
  });
})(window);
</script>
<!-- MVIP_OFFICE_PRESET_GEOMETRY_END -->
<style id="mvip-word-embedded-video-styles">
.mvip-word-video-button {
  display:inline-flex !important; align-items:center !important; justify-content:center !important;
  gap:12px !important; max-width:100%; height:31px !important;
  min-height:31px !important; max-height:31px !important; box-sizing:border-box !important;
  padding:2px 18px !important; margin:3px 0;
  border:2px solid #2563eb !important; border-radius:8px !important;
  background:#eff6ff !important; color:#1d4ed8 !important; cursor:pointer;
  font:700 20px/1 "Times New Roman",serif !important; vertical-align:middle;
  white-space:nowrap !important; text-align:left !important; pointer-events:auto !important;
}
/* Nhãn video chỉ một dòng: biểu tượng ▶, Xem video và tên tệp nằm trên cùng hàng. */
.mvip-word-video-button > span:first-child { font-size:20px !important; line-height:1 !important; flex:0 0 auto; }
.mvip-word-video-button > span:nth-child(2) {
  display:inline-flex !important; align-items:center !important; gap:8px !important;
  flex-wrap:nowrap !important; white-space:nowrap !important; min-width:0;
}
.mvip-word-video-button small {
  display:inline-block !important; font-size:14px; font-weight:400;
  min-width:0; max-width:100%; overflow:hidden; text-overflow:ellipsis;
  white-space:nowrap !important; overflow-wrap:normal !important;
}
.mvip-word-video-button:focus-visible { outline:3px solid #f59e0b; outline-offset:3px; }
.mvip-word-video-dialog {
  width:min(1000px,94vw); max-width:94vw; max-height:94vh; box-sizing:border-box;
  margin:auto; padding:14px; border:2px solid #2563eb; border-radius:16px;
  background:#fff; color:#172033; box-shadow:0 20px 80px #0009; overflow:auto;
}
.mvip-word-video-dialog::backdrop { background:#0f172acc; }
.mvip-word-video-heading { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:12px; }
.mvip-word-video-heading strong { min-width:0; overflow-wrap:anywhere; font:700 22px/1.3 "Times New Roman",serif; }
.mvip-word-video-heading button { flex:none; padding:8px 18px; border:1px solid #dc2626; border-radius:9px; color:#b91c1c; background:white; font:700 18px/1.3 "Times New Roman",serif; cursor:pointer; }
.mvip-word-video-dialog video { display:block; width:100%; max-height:calc(94vh - 150px); min-height:100px; background:#000; object-fit:contain; }
.mvip-word-video-download { display:inline-block; margin-top:10px; color:#1d4ed8; font:18px/1.3 "Times New Roman",serif; text-decoration:underline; }
.mvip-word-video-error { margin:10px 0 0; color:#b91c1c; font:18px/1.3 "Times New Roman",serif; }

</style>
<script id="mvip-word-embedded-video">
/* Embedded Word Package video: local CFB/OLENativeStream decoding only.
   MS-CFB sections 2.2–2.6; MS-OLEDS section 2.3.6. No Office automation,
   filesystem paths, executable objects, or server conversion are used. */
window.mvipWordVideo = (() => {
  function nativeStream(input) {
    const bytes = input instanceof Uint8Array ? input : new Uint8Array(input);
    const bad = () => { throw new Error('Dữ liệu video nhúng không đầy đủ.'); };
    if (bytes.length < 512 || ![0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1].every((v,i) => bytes[i] === v)) return null;
    const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
    const u16 = (p) => view.getUint16(p, true), u32 = (p) => view.getUint32(p, true);
    const major = u16(26), shift = u16(30);
    if (u16(28) !== 0xfffe || u16(32) !== 6 || u32(56) !== 4096
        || !((major === 3 && shift === 9) || (major === 4 && shift === 12))) return null;
    const sectorSize = 2 ** shift, sectorCount = Math.floor(bytes.length / sectorSize) - 1;
    const sector = (id) => {
      if (!Number.isInteger(id) || id < 0 || id >= sectorCount) return bad();
      return (id + 1) * sectorSize;
    };
    const fatIds = [], fatCount = u32(44), difCount = u32(72);
    if (fatCount > sectorCount || difCount > sectorCount) return bad();
    for (let p = 76; p < 512; p += 4) if (u32(p) !== 0xffffffff) fatIds.push(u32(p));
    let difId = u32(68);
    const visitedDif = new Set();
    for (let i = 0; i < difCount; i++) {
      if (visitedDif.has(difId)) return bad();
      visitedDif.add(difId);
      const start = sector(difId);
      for (let p = start; p < start + sectorSize - 4; p += 4) {
        if (u32(p) !== 0xffffffff) fatIds.push(u32(p));
      }
      difId = u32(start + sectorSize - 4);
    }
    if (fatIds.length !== fatCount || new Set(fatIds).size !== fatCount) return bad();
    const fat = new Uint32Array(fatCount * sectorSize / 4);
    fatIds.forEach((id, i) => {
      const start = sector(id);
      for (let j = 0; j < sectorSize / 4; j++) fat[i * sectorSize / 4 + j] = u32(start + j * 4);
    });
    const chain = (first, table, count) => {
      const ids = [], seen = new Set();
      for (let id = first; id !== 0xfffffffe; id = table[id]) {
        if (!Number.isInteger(id) || id >= count || id >= table.length || seen.has(id)) return bad();
        seen.add(id); ids.push(id);
      }
      return ids;
    };
    const readChain = (first, size, table = fat, source = bytes, unit = sectorSize, base = sectorSize) => {
      if (!Number.isSafeInteger(size) || size < 0 || size > bytes.length) return bad();
      const ids = chain(first, table, Math.floor((source.length - base) / unit));
      if (ids.length !== Math.ceil(size / unit)) return bad();
      const result = new Uint8Array(size);
      ids.forEach((id, i) => {
        const start = base + id * unit;
        result.set(source.subarray(start, start + Math.min(unit, size - i * unit)), i * unit);
      });
      return result;
    };
    const dirIds = chain(u32(48), fat, sectorCount);
    let root = null, entry = null;
    for (const id of dirIds) {
      const start = sector(id);
      for (let p = start; p < start + sectorSize; p += 128) {
        const type = bytes[p + 66], nameBytes = u16(p + 64);
        if (![2,5].includes(type) || nameBytes < 2 || nameBytes > 64 || nameBytes % 2) continue;
        let name = '';
        for (let j = 0; j < nameBytes - 2; j += 2) name += String.fromCharCode(u16(p + j));
        const info = { first:u32(p + 116), size:u32(p + 120) + (major === 4 ? u32(p + 124) * 4294967296 : 0) };
        if (type === 5) root = info;
        if (type === 2 && name.toLowerCase() === '\x01ole10native') entry = info;
      }
    }
    if (!entry || !entry.size) return null;
    if (entry.size >= 4096) return readChain(entry.first, entry.size);
    if (!root || !root.size) return bad();
    const miniFatBytes = readChain(u32(60), u32(64) * sectorSize);
    const miniView = new DataView(miniFatBytes.buffer), miniFat = new Uint32Array(miniFatBytes.length / 4);
    for (let i = 0; i < miniFat.length; i++) miniFat[i] = miniView.getUint32(i * 4, true);
    return readChain(entry.first, entry.size, miniFat, readChain(root.first, root.size), 64, 0);
  }

  function extract(input) {
    try {
      const bytes = nativeStream(input);
      if (!bytes || bytes.length < 20) return null;
      const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
      const end = view.getUint32(0, true) + 4;
      if (end > bytes.length || end < 20 || view.getUint16(4, true) !== 2) return null;
      let pos = 6;
      const string = () => {
        const start = pos;
        while (pos < end && bytes[pos] && pos - start < 32768) pos++;
        if (pos >= end || bytes[pos]) throw new Error('Invalid package string');
        const value = new TextDecoder('windows-1252').decode(bytes.subarray(start, pos));
        pos++;
        return value;
      };
      const name = string().split(/[\\/]/).pop().replace(/[\x00-\x1f\x7f]/g, '').slice(0, 180);
      string(); // Discard the original machine's path.
      pos += 8;
      string(); // Discard the temporary machine path.
      if (pos + 4 > end) return null;
      const size = view.getUint32(pos, true); pos += 4;
      if (!size || pos + size > end) return null;
      const data = bytes.subarray(pos, pos + size);
      const signature = (offset, text) => Array.from(text).every((c,i) => data[offset + i] === c.charCodeAt(0));
      const extension = (name.match(/\.([^.]+)$/) || [,''])[1].toLowerCase();
      let mimeType = '';
      if (['mp4','m4v','mov'].includes(extension) && data.length >= 12 && signature(4, 'ftyp')) {
        mimeType = extension === 'mov' ? 'video/quicktime' : 'video/mp4';
      } else if (extension === 'webm' && [0x1a,0x45,0xdf,0xa3].every((v,i) => data[i] === v)) mimeType = 'video/webm';
      else if (['ogv','ogg'].includes(extension) && signature(0,'OggS')) mimeType = 'video/ogg';
      else if (extension === 'avi' && signature(0,'RIFF') && signature(8,'AVI ')) mimeType = 'video/x-msvideo';
      else if (['wmv','asf'].includes(extension) && [0x30,0x26,0xb2,0x75,0x8e,0x66,0xcf,0x11].every((v,i) => data[i] === v)) mimeType = 'video/x-ms-wmv';
      return mimeType ? {fileName:name, mimeType, data} : null;
    } catch (_) { return null; }
  }

  let serial = 0, ids = new WeakMap();
  const assets = new Map();
  let dialog = null, objectUrl = '', opener = null;
  const escape = (s) => String(s).replace(/[&<>"']/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c]));
  function buttonHtml(media) {
    if (!media || !media.data) return '';
    let id = ids.get(media);
    if (!id || !assets.has(id)) { id = 'word-video-' + (++serial); ids.set(media, id); assets.set(id, media); }
    return `<button type="button" class="mvip-word-video-button" data-mvip-word-video="${id}" title="Phát ${escape(media.fileName)}" aria-label="Phát video ${escape(media.fileName)}"><span aria-hidden="true">▶</span><span>Xem video<small>${escape(media.fileName)}</small></span></button>`;
  }
  function prepareDocument(doc, imageMap) {
    const markers = [], ns = 'http://schemas.openxmlformats.org/wordprocessingml/2006/main';
    for (const object of Array.from(doc.getElementsByTagNameNS(ns, 'object'))) {
      const image = Array.from(object.getElementsByTagName('*')).map(node =>
        imageMap[cv7991RelationIdFromElement(node)]).find(item => item && item.embeddedVideo);
      if (!image || !object.parentNode) continue;
      const marker = `MVIPWORDVIDEO${markers.length + 1}TOKEN`;
      const text = doc.createElementNS(ns, 'w:t'); text.textContent = marker;
      if (object.parentNode.localName === 'r') object.replaceWith(text);
      else { const run = doc.createElementNS(ns,'w:r'); run.appendChild(text); object.replaceWith(run); }
      markers.push({marker, media:image.embeddedVideo});
    }
    return markers;
  }
  function hydrate(root, markers) {
    if (!root || !markers || !markers.length) return;
    const byMarker = new Map(markers.map(item => [item.marker, item.media]));
    const walker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT), nodes = [];
    while (walker.nextNode()) if (/MVIPWORDVIDEO\d+TOKEN/.test(walker.currentNode.nodeValue || '')) nodes.push(walker.currentNode);
    for (const node of nodes) {
      const parts = String(node.nodeValue).split(/(MVIPWORDVIDEO\d+TOKEN)/g), fragment = document.createDocumentFragment();
      for (const part of parts) {
        const media = byMarker.get(part);
        if (!media) fragment.appendChild(document.createTextNode(part));
        else { const host = document.createElement('span'); host.innerHTML = buttonHtml(media); fragment.appendChild(host.firstElementChild); }
      }
      node.replaceWith(fragment);
    }
  }
  function close() {
    const current = dialog; dialog = null;
    if (current) {
      const video = current.querySelector('video');
      if (video) { video.pause(); video.removeAttribute('src'); video.load(); }
      if (current.open) current.close();
      current.remove();
    }
    if (objectUrl) { URL.revokeObjectURL(objectUrl); objectUrl = ''; }
    if (opener && opener.isConnected) opener.focus({preventScroll:true});
    opener = null;
  }
  function reset() { close(); assets.clear(); ids = new WeakMap(); }
  function open(button) {
    const media = assets.get(button.dataset.mvipWordVideo);
    if (!media) return;
    close(); opener = button;
    const host = document.getElementById('wordPresentationPresenter');
    dialog = document.createElement('dialog'); dialog.className = 'mvip-word-video-dialog';
    dialog.setAttribute('aria-label', 'Video trong tài liệu Word');
    dialog.innerHTML = '<div class="mvip-word-video-heading"><strong></strong><button type="button" data-word-video-close>Đóng</button></div><video controls playsinline preload="metadata"></video><p class="mvip-word-video-error" hidden>Trình duyệt chưa phát được video này. Bạn có thể tải video để mở trên máy.</p><a class="mvip-word-video-download">Tải video</a>';
    dialog.querySelector('strong').textContent = media.fileName;
    const video = dialog.querySelector('video');
    video.setAttribute('aria-label', media.fileName);
    objectUrl = URL.createObjectURL(new Blob([media.data], {type:media.mimeType}));
    video.src = objectUrl;
    const download = dialog.querySelector('a'); download.href = objectUrl; download.download = media.fileName;
    video.addEventListener('error', () => { if (video.isConnected) video.parentNode.querySelector('p').hidden = false; });
    dialog.addEventListener('cancel', event => { event.preventDefault(); close(); });
    dialog.addEventListener('close', () => { if (dialog && !dialog.open) close(); });
    (host && !host.hidden ? host : document.body).appendChild(dialog);
    dialog.showModal();
    video.play().catch(() => {}); // User clicked Play; native controls remain available if playback is blocked.
  }
  document.addEventListener('click', event => {
    const target = event.target instanceof Element ? event.target : null;
    if (!target) return;
    const button = target.closest('[data-mvip-word-video]');
    if (button) { event.preventDefault(); event.stopImmediatePropagation(); open(button); return; }
    if (dialog && dialog.contains(target)) {
      event.stopImmediatePropagation();
      if (target.closest('[data-word-video-close]')) { event.preventDefault(); close(); }
    }
  }, true);
  // Keep drawing, image zoom and presentation shortcuts away from native video controls.
  for (const type of ['pointerdown','pointerup','mousedown','mouseup','touchstart','touchend','dblclick','keydown','keyup']) {
    document.addEventListener(type, event => {
      if (!dialog) return;
      if (type === 'keydown' && event.key === 'Escape') {
        event.preventDefault(); event.stopImmediatePropagation(); close(); return;
      }
      if (event.target instanceof Node && dialog.contains(event.target)) event.stopImmediatePropagation();
    }, true);
  }
  return {extract, buttonHtml, prepareDocument, hydrate, reset, close};
})();

</script>
<script id="mvip-document-hyperlinks">
/* Hyperlinks are document actions, ahead of image zoom and slide navigation. */
function mvipSafeHyperlink(value) {
  const raw = String(value || '').trim();
  if (!raw || /[\u0000-\u001f\u007f]/.test(raw)) return '';
  if (raw[0] === '#') return raw;
  // Do not turn local file paths or executable schemes into website URLs.
  if (/^(?:[a-z]:[\\/]|\\\\|file:)/i.test(raw)) return '';
  try {
    const url = new URL(raw, window.location.href);
    return ['http:', 'https:', 'mailto:', 'tel:'].includes(url.protocol)
      && !url.username && !url.password ? url.href : '';
  } catch (_) { return ''; }
}

function mvipDocumentLinkTarget(target) {
  const element = target instanceof Element ? target : target && target.parentElement;
  return element && element.closest('a[href], a[xlink\\:href]');
}

function mvipSetDocumentLink(anchor, target) {
  const href = mvipSafeHyperlink(target);
  if (!href) return false;
  anchor.setAttribute('href', href);
  if (!href.startsWith('#')) {
    anchor.setAttribute('target', '_blank');
    anchor.setAttribute('rel', 'noopener noreferrer');
  }
  return true;
}

function mvipAttachObjectHyperlink(host, target, title) {
  if (!(host instanceof Element) || !mvipSafeHyperlink(target)) return;
  const anchor = document.createElement('a');
  anchor.className = 'mvip-document-object-link';
  mvipSetDocumentLink(anchor, target);
  anchor.setAttribute('aria-label', title || 'Mở liên kết');
  anchor.title = title || target;
  if (!host.style.position || host.style.position === 'static') host.style.position = 'relative';
  host.appendChild(anchor);
}

// Preserve HYPERLINK fields as real Word hyperlinks, including older field codes.
function mvipNormalizeWordHyperlinkFields(doc, targets) {
  const ns = 'http://schemas.openxmlformats.org/wordprocessingml/2006/main';
  const rns = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';
  const attr = (node, key) => node.getAttributeNS(ns, key) || node.getAttribute('w:' + key) || '';
  let serial = 0, changed = false;
  function linkFor(instruction) {
    const match = String(instruction || '').match(/^\s*HYPERLINK\s+(?:"([^"]*)"|([^\s\\]+))?/i);
    if (!match) return null;
    let target = match[1] || match[2] || '';
    const bookmark = String(instruction).match(/\\l\s+(?:"([^"]+)"|([^\s]+))/i);
    if (bookmark) target += '#' + (bookmark[1] || bookmark[2]);
    target = mvipSafeHyperlink(target);
    if (!target) return null;
    const link = doc.createElementNS(ns, 'w:hyperlink');
    if (target.startsWith('#')) link.setAttributeNS(ns, 'w:anchor', target.slice(1));
    else {
      let id;
      do { id = 'mvipHyperlinkField' + (++serial); } while (targets[id]);
      targets[id] = target;
      link.setAttributeNS(rns, 'r:id', id);
    }
    return link;
  }
  Array.from(doc.getElementsByTagNameNS(ns, 'fldSimple')).forEach(field => {
    const link = linkFor(attr(field, 'instr'));
    if (!link || !field.parentNode) return;
    while (field.firstChild) link.appendChild(field.firstChild);
    field.replaceWith(link); changed = true;
  });
  Array.from(doc.getElementsByTagNameNS(ns, 'p')).forEach(paragraph => {
    let field = null, depth = 0;
    Array.from(paragraph.children).forEach(child => {
      const codes = Array.from(child.getElementsByTagNameNS(ns, 'fldChar'));
      const kinds = codes.map(code => attr(code, 'fldCharType'));
      if (kinds.includes('begin')) {
        depth += 1;
        if (depth === 1) field = { nodes: [], result: [], instruction: '', separated: false, nested: false };
        else if (field) field.nested = true;
      }
      if (!field) return;
      field.nodes.push(child);
      if (kinds.includes('end')) {
        depth -= 1;
        if (depth === 0) {
          const link = !field.nested && field.separated && linkFor(field.instruction);
          if (link && field.result.length) {
            paragraph.insertBefore(link, field.nodes[0]);
            field.result.forEach(node => link.appendChild(node));
            field.nodes.forEach(node => { if (node.parentNode === paragraph) node.remove(); });
            changed = true;
          }
          field = null;
        }
      } else if (kinds.includes('separate')) field.separated = true;
      else if (field.separated) field.result.push(child);
      else field.instruction += Array.from(child.getElementsByTagNameNS(ns, 'instrText')).map(n => n.textContent).join('');
    });
  });
  return changed;
}

(() => {
  const scope = '#wordPresentationCard, #wordPresentationAnswerContent, #singleExamSlide';
  function onLink(event) {
    const anchor = mvipDocumentLinkTarget(event.target);
    if (!anchor || !anchor.closest(scope)) return;
    const raw = anchor.getAttribute('href') || anchor.getAttributeNS('http://www.w3.org/1999/xlink', 'href') || '';
    const href = mvipSafeHyperlink(raw);
    if (!href) { event.preventDefault(); event.stopImmediatePropagation(); return; }
    if (href.startsWith('#')) {
      // PowerPoint actions and PDF destinations have their own target listeners.
      if (anchor.classList.contains('pptx-native-link-overlay') || anchor.dataset.mvipInternalAction) return;
      event.preventDefault(); event.stopImmediatePropagation();
      if (typeof window.mvipFollowDocumentBookmark === 'function') window.mvipFollowDocumentBookmark(href, anchor);
      return;
    }
    mvipSetDocumentLink(anchor, href);
    // Keep the browser's native default action (also Ctrl-click/middle-click).
    event.stopImmediatePropagation();
  }
  document.addEventListener('click', onLink, true);
  document.addEventListener('auxclick', onLink, true);
  document.addEventListener('keydown', event => {
    if (event.key !== 'Enter' || !mvipDocumentLinkTarget(event.target)) return;
    if (!event.target.closest(scope)) return;
    event.stopImmediatePropagation(); // native Enter activates the anchor
  }, true);
})();

</script>
<script id="word-presentation-feature-script">
  (() => {
    'use strict';

    const WP_PRESENTATION_LOADING_TEXT = 'Đang load bài trình chiếu';
    const startBtn = document.getElementById('wordPresentationStartBtn');
    const fileInput = document.getElementById('wordPresentationFileInput');
    const ordinaryFileInput = document.getElementById('ordinaryDocumentFileInput');
    const powerPointFileInput = document.getElementById('powerPointPresentationFileInput');
    const documentModeModal = document.getElementById('documentPresentationChoiceModal');
    const documentModeCloseBtn = document.getElementById('documentPresentationChoiceCloseBtn');
    const documentQuestionBtn = document.getElementById('documentPresentationQuestionBtn');
    const documentOrdinaryBtn = document.getElementById('documentPresentationOrdinaryBtn');
    const documentPowerPointBtn = document.getElementById('documentPresentationPowerPointBtn');
    const introUnifiedPresentationBtn = document.getElementById('introUnifiedPresentationBtn');
    const introQuestionPresentationBtn = document.getElementById('introQuestionPresentationBtn');
    const documentModeStatusEl = document.getElementById('documentPresentationChoiceStatus');
    const sourceModal = document.getElementById('wordPresentationChoiceModal');
    const sourceCloseBtn = document.getElementById('wordPresentationChoiceCloseBtn');
    const sourceLocalBtn = document.getElementById('wordPresentationChoiceLocalBtn');
    const sourceSampleBtn = document.getElementById('wordPresentationSampleOpenBtn');
    const sourceStatusEl = document.getElementById('wordPresentationChoiceStatus');
    const sampleModal = document.getElementById('wordPresentationSampleModal');
    const sampleCloseBtn = document.getElementById('wordPresentationSampleCloseBtn');
    const presenter = document.getElementById('wordPresentationPresenter');
    const titleEl = document.getElementById('wordPresentationTitle');
    const progressEl = document.getElementById('wordPresentationProgress');
    const zoomOutBtn = document.getElementById('wordPresentationZoomOutBtn');
    const zoomInBtn = document.getElementById('wordPresentationZoomInBtn');
    const typeEl = document.getElementById('wordPresentationType');
    const accessBanner = document.getElementById('wordPresentationAccessBanner');
    const accessMessageEl = document.getElementById('wordPresentationAccessMessage');
    const accessActionBtn = document.getElementById('wordPresentationAccessActionBtn');
    const subscriptionModalEl = document.getElementById('subscriptionModal');
    const subscriptionCloseBtnEl = document.getElementById('subscriptionCloseBtn');
    const scanTools = document.getElementById('wordPresentationScanTools');
    const classSelect = document.getElementById('wordPresentationClassSelect');
    const scanStatusEl = document.getElementById('wordPresentationScanStatus');
    const resultBtn = document.getElementById('wordPresentationResultBtn');
    const answerBtn = document.getElementById('wordPresentationAnswerBtn');
    const httcBadgeEl = document.getElementById('wordPresentationHttcBadge');
    const answerModal = document.getElementById('wordPresentationAnswerModal');
    const answerTitleEl = document.getElementById('wordPresentationAnswerTitle');
    const answerContentEl = document.getElementById('wordPresentationAnswerContent');
    const answerCloseBtn = document.getElementById('wordPresentationAnswerCloseBtn');
    const imageZoomModal = document.getElementById('wordPresentationImageZoomModal');
    const imageZoomTitleEl = document.getElementById('wordPresentationImageZoomTitle');
    const imageZoomBodyEl = document.getElementById('wordPresentationImageZoomBody');
    const imageZoomContentEl = document.getElementById('wordPresentationImageZoomContent');
    const imageZoomCloseBtn = document.getElementById('wordPresentationImageZoomCloseBtn');
    const allBtn = document.getElementById('wordPresentationAllBtn');
    const chooseQuestionBtn = document.getElementById('wordPresentationChooseQuestionBtn');
    const questionPickerModal = document.getElementById('wordPresentationQuestionPickerModal');
    const questionPickerBody = document.getElementById('wordPresentationQuestionPickerBody');
    const questionPickerSummary = document.getElementById('wordPresentationQuestionPickerSummary');
    const questionPickerCloseBtn = document.getElementById('wordPresentationQuestionPickerCloseBtn');
    const jumpInput = document.getElementById('wordPresentationJumpInput');
    const jumpBtn = document.getElementById('wordPresentationJumpBtn');
    const regionBtn = document.getElementById('wordPresentationRegionBtn');
    const countdownInput = document.getElementById('wordPresentationCountdownInput');
    const fullscreenBtn = document.getElementById('wordPresentationFullscreenBtn');
    const prevBtn = document.getElementById('wordPresentationPrevBtn');
    const nextBtn = document.getElementById('wordPresentationNextBtn');
    const closeBtn = document.getElementById('wordPresentationCloseBtn');
    const viewport = document.getElementById('wordPresentationViewport');
    const fitLayer = document.getElementById('wordPresentationFitLayer');
    const card = document.getElementById('wordPresentationCard');
    const powerPointControls = document.getElementById('powerPointPresentationControls');
    const powerPointPrevBtn = document.getElementById('powerPointPresentationPrevBtn');
    const powerPointPlayBtn = document.getElementById('powerPointPresentationPlayBtn');
    const powerPointCounterEl = document.getElementById('powerPointPresentationCounter');
    const powerPointNextBtn = document.getElementById('powerPointPresentationNextBtn');
    const powerPointFullscreenBtn = document.getElementById('powerPointPresentationFullscreenBtn');
    const powerPointCloseBtn = document.getElementById('powerPointPresentationCloseBtn');

    if (!startBtn || !fileInput || !ordinaryFileInput || !powerPointFileInput
      || !documentModeModal || !documentModeCloseBtn
      || !documentQuestionBtn || !documentOrdinaryBtn || !documentPowerPointBtn || !documentModeStatusEl
      || !sourceModal || !sourceCloseBtn || !sourceLocalBtn || !sourceSampleBtn
      || !sourceStatusEl || !sampleModal || !sampleCloseBtn || !presenter || !viewport || !fitLayer || !card
      || !accessBanner || !accessMessageEl || !accessActionBtn
      || !scanTools || !classSelect || !scanStatusEl || !resultBtn || !regionBtn || !countdownInput
      || !answerBtn || !answerModal || !answerTitleEl || !answerContentEl || !answerCloseBtn
      || !imageZoomModal || !imageZoomTitleEl || !imageZoomBodyEl || !imageZoomContentEl || !imageZoomCloseBtn
      || !allBtn || !chooseQuestionBtn || !questionPickerModal || !questionPickerBody
      || !questionPickerSummary || !questionPickerCloseBtn || !jumpInput || !jumpBtn
      || !powerPointControls || !powerPointPrevBtn || !powerPointPlayBtn || !powerPointCounterEl
      || !powerPointNextBtn || !powerPointFullscreenBtn || !powerPointCloseBtn) return;

    const answerDialogEl = answerModal.querySelector('.word-presentation-answer-dialog');
    const answerHeadEl = answerModal.querySelector('.word-presentation-answer-head');
    if (!answerDialogEl || !answerHeadEl) return;
    answerHeadEl.title = 'Giữ chuột trái và kéo để di chuyển bảng lời giải';
    answerDialogEl.title = 'Giữ chuột trái và kéo để di chuyển bảng lời giải';

    // Dùng chung một khung phóng to cho cả Trình chiếu Word và Dùng câu hỏi của MVIP.
    // Đưa modal ra body để nó không bị ẩn theo presenter Word khi MVIP đang trình chiếu.
    if (imageZoomModal.parentElement !== document.body) document.body.appendChild(imageZoomModal);

    const wpState = {
      questions: [],
      index: 0,
      fileName: '',
      documentMode: 'questions',
      context: { imageMap: {}, tableMap: {}, equationMap: {} },
      busy: false,
      viewMode: 'single',
      fitFrame: 0,
      fitTimers: [],
      fitSettleTimer: 0,
      fitRunning: false,
      fitPending: false,
      fitDirty: false,
      fitLastRunAt: 0,
      fitLastSignature: '',
      fullscreenEventFrame: 0,
      layoutSwitchReleaseTimer: 0,
      layoutSwitchReleaseFrame: 0,
      answerVisible: false,
      tfAnswerRevealIndex: 0,
      essayAnswerRevealIndex: 0,
      mediaLayoutToken: 0,
      fileUid: '',
      scanAuthorized: false,
      activeTfLetter: '',
      scanPreviewed: false,
      repickPending: null,
      scanSplitActive: false,
      scanSplitForcedDesktop: false,
      scanSplitHadDesktop: false,
      fullscreenTransition: false,
      closing: false,
      regionTool: {
        selecting: false,
        zoomed: false,
        dragActive: false,
        pointerId: null,
        startX: 0,
        startY: 0,
      },
      upgradeModalOpenFromPresentation: false,
      subscriptionModalHostedInPresenter: false,
      allViewRenderToken: 0,
      allViewIdleHandle: 0,
      allViewIdleKind: '',
      allViewObserver: null,
      allViewProcessQueue: [],
      allViewRenderedCount: 0,
      allViewTotalCount: 0,
      allViewLoadingEl: null,
      allViewLoadingRemovalTimer: 0,
      questionPickerReturnFocus: null,
    };

    const wpOrdinaryState = {
      kind: '',
      fileName: '',
      pageIndex: 0,
      pageCount: 0,
      pdfDocument: null,
      pdfLoadingTask: null,
      pdfRenderTask: null,
      pdfPageStages: [],
      pdfRenderedPages: new Set(),
      pdfPagePromises: new Map(),
      pdfLazyIdleHandle: 0,
      pdfLazyIdleKind: '',
      docxPages: [],
      docxWrapper: null,
      docxLazyIdleHandle: 0,
      docxLazyIdleKind: '',
      docxLazyHost: null,
      docxPageCountHint: 0,
      xlsxPages: [],
      xlsxRoot: null,
      xlsxSheetNames: [],
      xlsxTabBar: null,
      xlsxScrollPositions: new Map(),
      officeObjectUrls: [],
      pptxPages: [],
      pptxRoot: null,
      pptxViewer: null,
      pptxMode: '',
      pptxSlidePlans: [],
      pptxBuildGroups: [],
      pptxBuildIndex: 0,
      pptxRenderSerial: 0,
      pptxQueuedDirection: 0,
      pptxQueuedFullscreenOnSlideChange: false,
      pptxAutoTimer: 0,
      pptxPlaybackActive: false,
      pptxPlaybackPaused: false,
      pptxThumbnails: [],
      pptxThumbnailSerial: 0,
      pptxThumbnailPromise: null,
      pptxCacheKey: '',
      pptxRememberedPageIndex: -1,
      pptxPreloadedPages: [],
      pptxPreloadViewer: null,
      pptxPreloadHost: null,
      pptxPreloadRunning: false,
      pptxPreloadIdleHandle: 0,
      pptxPreloadIdleKind: '',
      pptxWheelLockUntil: 0,
      pptxObjectUrls: [],
      pptxDecodedSoundBuffers: new Map(),
      pptxAudioContext: null,
      pptxAudioBufferPromises: new Map(),
      pptxAudioSourceNodes: new Map(),
      pptxAudioUnlocked: false,
      pptxSelectedTriggerShapeId: '',
      baseContentWidth: 0,
      renderToken: 0,
      scrollFrame: 0,
      zoom: 1,
      minZoom: .5,
      maxZoom: 4,
      panActive: false,
      panPointerId: null,
      panStartX: 0,
      panStartY: 0,
      panStartScrollLeft: 0,
      panStartScrollTop: 0,
      panMoved: false,
      touchMode: '',
      touchStartDistance: 0,
      touchStartZoom: 1,
      touchAnchorX: 0,
      touchAnchorY: 0,
      touchPanStartX: 0,
      touchPanStartY: 0,
      touchPanScrollLeft: 0,
      touchPanScrollTop: 0,
      touchMoved: false,
      suppressClickUntil: 0,
    };

    const wpSubscriptionModalHome = subscriptionModalEl ? {
      parent: subscriptionModalEl.parentNode,
      nextSibling: subscriptionModalEl.nextSibling,
    } : null;

    function wpPlainLower(value) {
      if (typeof cv7991PlainLower === 'function') return cv7991PlainLower(value);
      return String(value || '')
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd')
        .replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/\s+/g, ' ')
        .trim();
    }

    function wpEscape(value) {
      if (typeof escapeHtml === 'function') return escapeHtml(String(value == null ? '' : value));
      return String(value == null ? '' : value)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#039;');
    }

    function wpRich(value) {
      const rawText = String(value || '');
      const text = typeof cv7991CompactPresenterWhitespace === 'function'
        ? cv7991CompactPresenterWhitespace(rawText)
        : rawText.replace(/\r\n?/g, '\n').replace(/\n[ \t\u00a0]*\n+/g, '\n');
      if (!text) return '';
      const renderSegment = (segment) => {
        if (typeof cv7991PresenterHtmlFromText === 'function') {
          try { return cv7991PresenterHtmlFromText(segment, wpState.context); } catch (_) {}
        }
        return wpEscape(segment).replace(/\n/g, '<br>');
      };

      // Gói công thức và dấu câu ngay sau nó trong cùng một hộp không ngắt dòng.
      // Word Joiner đơn thuần chưa đủ với phần tử IMG/SVG thay thế, vì trình duyệt
      // vẫn có thể xuống dòng giữa phần tử công thức và dấu chấm.
      const tokenTailPattern = /(\[\[CV7991_(IMG|OMML):([^\]]+)\]\])[ \t]*([.,;:!?])/g;
      let output = '';
      let cursor = 0;
      let match;
      while ((match = tokenTailPattern.exec(text))) {
        output += renderSegment(text.slice(cursor, match.index));
        const kind = String(match[2] || '').toUpperCase();
        const id = String(match[3] || '').trim();
        let isFormula = kind === 'OMML';
        if (!isFormula && kind === 'IMG') {
          const image = wpState && wpState.context && wpState.context.imageMap
            ? wpState.context.imageMap[id]
            : null;
          if (image && typeof cv7991PresenterImageIsFormula === 'function') {
            try { isFormula = !!cv7991PresenterImageIsFormula(image); } catch (_) {}
          }
        }
        if (isFormula) {
          output += `<span class="word-presentation-formula-tail">${renderSegment(match[1])}<span class="word-presentation-formula-tail-punct">${wpEscape(match[4])}</span></span>`;
        } else {
          output += renderSegment(match[0]);
        }
        cursor = tokenTailPattern.lastIndex;
      }
      output += renderSegment(text.slice(cursor));
      return output;
    }


    function wpRichParagraphs(value, options = {}) {
      const rawText = String(value || '');
      const text = typeof cv7991CompactPresenterWhitespace === 'function'
        ? cv7991CompactPresenterWhitespace(rawText)
        : rawText.replace(/\r\n?/g, '\n').replace(/\n[ \t\u00a0]*\n+/g, '\n');
      if (!text) return '';

      const firstInline = !!(options && options.firstInline);
      const lines = text.split(/\n+/).map((line) => String(line || '').trim()).filter(Boolean);
      if (!lines.length) return '';

      const standaloneVisualPattern = /^(?:(?:\[\[CV7991_(?:IMG|TBL):[^\]]+\]\])\s*)+$/i;
      return lines.map((line, index) => {
        const rendered = wpRich(line);
        if (!rendered) return '';
        const visualOnly = standaloneVisualPattern.test(line
          .replace(/\[\[CV7991_FMT_U_(?:START|END)\]\]/gi, '')
          .trim());
        if (visualOnly) {
          return `<div class="cv7991-presentation-visual-paragraph">${rendered}</div>`;
        }
        const inlineClass = firstInline && index === 0 ? ' is-first-inline' : '';
        /* Hai &nbsp; là đúng hai ký tự trắng nhìn thấy ở đầu từng đoạn. */
        return `<span class="cv7991-presentation-text-paragraph${inlineClass}">&nbsp;&nbsp;${rendered}</span>`;
      }).join('');
    }

    const wpDirectImageZoomSelector = [
      'img:not(.single-exam-inline-formula):not(.mvip-ordinary-word-mathtype-raster)',
      '.single-exam-inline-vector:not(.single-exam-inline-formula)',
      '.single-exam-word-group-figure',
      'canvas:not(.word-presentation-ink-canvas):not(.cv7991-geometry-canvas)',
      'svg:not(.single-exam-mathjax-svg)',
      'table.single-exam-inline-table'
    ].join(', ');

    function wpIsFormulaZoomElement(element) {
      return !!(element instanceof Element && (
        element.matches('.single-exam-inline-formula, .single-exam-mathjax-svg, .mvip-ordinary-word-mathtype-raster, .mvip-ordinary-word-mathtype-box, .mvip-ordinary-word-mathtype-visual')
        || element.closest('.single-exam-inline-formula, .word-presentation-formula-tail, .mvip-ordinary-word-mathtype-box, .mvip-ordinary-word-mathtype-visual')
      ));
    }

    function wpIsOfficeVectorElement(element) {
      return !!(element instanceof Element && element.closest([
        '.mvip-office-vector-shape',
        '.mvip-office-vector-group',
        '.mvip-office-object[data-office-object-kind="shape"]',
        '.mvip-office-object[data-office-object-kind="shape-group"]',
        '.mvip-office-inline-object[data-office-object-kind="shape"]',
        '.mvip-office-inline-object[data-office-object-kind="shape-group"]',
      ].join(', ')));
    }

    function wpNormalizeDirectZoomElement(element, policy = null) {
      if (!(element instanceof Element) || imageZoomModal.contains(element)
          || wpIsFormulaZoomElement(element)) return null;
      const object = cv7991MediaZoomObject(element);
      return object && cv7991CanZoomObject(object, policy) ? object : null;
    }

    function wpDirectZoomCandidates(root) {
      const policy = cv7991RefreshMediaZoomPolicy(root);
      return policy.objects.map(element => wpNormalizeDirectZoomElement(element, policy)).filter(Boolean);
    }

    function wpClearOfficeVectorImageZoom(root) {
      if (!(root instanceof Element)) return;
      const selector = '.mvip-office-vector-shape, .mvip-office-vector-group';
      const vectors = root.matches(selector) ? [root] : [];
      root.querySelectorAll(selector).forEach((element) => vectors.push(element));
      vectors.forEach((element) => {
        element.classList.remove('word-presentation-direct-zoom', 'cv7991-presentation-image-frame');
        element.removeAttribute('data-word-image-zoom');
        if (element.getAttribute('role') === 'button') element.setAttribute('role', 'group');
        if (element.getAttribute('tabindex') === '0') element.removeAttribute('tabindex');
        if (/phóng to/i.test(String(element.getAttribute('title') || ''))) element.removeAttribute('title');
        if (/phóng to/i.test(String(element.getAttribute('aria-label') || ''))) {
          element.setAttribute('aria-label', 'Hình vẽ Office');
        }
      });
    }

    function wpClearAllDirectImageZoom(root) {
      if (!(root instanceof Element)) return;
      const selector = '[data-word-image-zoom], .word-presentation-direct-zoom, .cv7991-presentation-image-frame';
      const elements = root.matches(selector) ? [root] : [];
      root.querySelectorAll(selector).forEach((element) => elements.push(element));
      elements.forEach((element) => {
        cv7991SetMediaZoomOutline(element, false);
        element.classList.remove('word-presentation-direct-zoom', 'cv7991-presentation-image-frame');
        element.removeAttribute('data-word-image-zoom');
        if (element.getAttribute('role') === 'button') element.removeAttribute('role');
        if (element.getAttribute('tabindex') === '0') element.removeAttribute('tabindex');
        if (/phóng to/i.test(String(element.getAttribute('title') || ''))) element.removeAttribute('title');
        if (/phóng to/i.test(String(element.getAttribute('aria-label') || ''))) element.removeAttribute('aria-label');
      });
    }

    function wpPrepareDirectImageZoom(root) {
      wpDirectZoomCandidates(root).forEach((element) => {
        element.classList.remove('cv7991-presentation-image-frame');
        element.querySelectorAll('[data-word-image-zoom]').forEach(wpClearAllDirectImageZoom);
        const layer = element.closest('.mvip-office-object-layer');
        if (layer) layer.removeAttribute('aria-hidden');
        element.classList.add('word-presentation-direct-zoom');
        element.setAttribute('data-word-image-zoom', '1');
        cv7991SetMediaZoomOutline(element, true);
        if (!element.hasAttribute('tabindex')) element.setAttribute('tabindex', '0');
        if (!element.hasAttribute('role')) element.setAttribute('role', 'button');
        const alt = element instanceof HTMLImageElement ? String(element.alt || '').trim() : '';
        const label = alt && !/^hình minh họa$/i.test(alt)
          ? `Bấm để phóng to: ${alt}`
          : 'Bấm để phóng to hình ảnh';
        element.setAttribute('aria-label', label);
        element.setAttribute('title', label);
      });
    }

    function wpDirectZoomSourceFromTarget(target, root = presenter) {
      const geometryActive = [window.mvipWordGeometryTool, window.mvipSingleExamGeometryTool]
        .some((api) => api && typeof api.tool === 'function' && !!api.tool());
      if (geometryActive || !(target instanceof Element) || imageZoomModal.contains(target) || target.closest('.word-presentation-ink-canvas, .cv7991-geometry-canvas')) return null;
      if (mvipDocumentLinkTarget(target)) return null;
      if (target.closest('.mvip-left-temporary-paste-layer, .mvip-whiteboard-pasted-image-layer')) return null;
      if (wpState.documentMode === 'ordinary'
          && (performance.now() < wpOrdinaryState.suppressClickUntil || presenter.classList.contains('is-pptx-rendering'))) return null;
      const raw = cv7991MediaZoomObject(target);
      const normalized = wpNormalizeDirectZoomElement(raw);
      if (!normalized || !(root instanceof Element) || !root.contains(normalized)) return null;
      if (normalized.closest('.word-presentation-region-zoom-pane, .word-presentation-region-overlay, .single-exam-region-zoom-pane, .single-exam-region-overlay')) return null;
      return normalized;
    }

    function wpRemoveDuplicateIdsFromZoomClone(root) {
      if (!(root instanceof Element)) return;
      const serial = `wpImageZoom${Date.now()}${Math.floor(Math.random() * 10000)}`;
      const idMap = new Map();
      const idNodes = [];
      if (root.hasAttribute('id')) idNodes.push(root);
      root.querySelectorAll('[id]').forEach((node) => idNodes.push(node));
      idNodes.forEach((node, index) => {
        const oldId = String(node.id || '').trim();
        if (!oldId) return;
        const nextId = `${serial}_${index}`;
        idMap.set(oldId, nextId);
        node.id = nextId;
      });
      if (!idMap.size) return;
      const allNodes = [root, ...Array.from(root.querySelectorAll('*'))];
      allNodes.forEach((node) => {
        Array.from(node.attributes || []).forEach((attribute) => {
          let value = String(attribute.value || '');
          idMap.forEach((nextId, oldId) => {
            const escapedId = oldId.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
            value = value
              .replace(new RegExp(`url\\(\\s*#${escapedId}\\s*\\)`, 'g'), `url(#${nextId})`)
              .replace(new RegExp(`^#${escapedId}$`), `#${nextId}`)
          });
          if (value !== attribute.value) node.setAttribute(attribute.name, value);
        });
      });
    }

    function wpCloneZoomVisual(source) {
      if (!(source instanceof Element)) return null;
      if (source instanceof HTMLCanvasElement) {
        const image = document.createElement('img');
        try { image.src = source.toDataURL('image/png'); } catch (_) { return null; }
        image.alt = 'Hình ảnh phóng to';
        return image;
      }
      if (source instanceof HTMLImageElement) {
        const image = document.createElement('img');
        image.src = source.currentSrc || source.src || '';
        image.alt = source.alt || 'Hình ảnh phóng to';
        return image.src ? image : null;
      }
      const clone = source.cloneNode(true);
      if (!(clone instanceof Element)) return null;
      if (source.matches('.mvip-office-object, .mvip-office-inline-object, [data-cv7991-pptx-kind], .single-exam-word-group-figure, .single-exam-inline-vector')) {
        const stage = document.createElement('div');
        stage.className = 'cv7991-native-zoom-stage';
        const width = Math.max(1, source.offsetWidth || source.getBoundingClientRect().width);
        const height = Math.max(1, source.offsetHeight || source.getBoundingClientRect().height);
        const from = [source, ...source.querySelectorAll('*')];
        const to = [clone, ...clone.querySelectorAll('*')];
        from.forEach((node, index) => {
          const style = getComputedStyle(node);
          for (let i = 0; i < style.length; i++) {
            const key = style[i];
            to[index].style.setProperty(key, style.getPropertyValue(key), 'important');
          }
          if (node.getAttribute('data-word-image-zoom') === '1') {
            cv7991SetMediaZoomOutline(to[index], false);
            to[index].style.setProperty('outline', 'none', 'important');
            to[index].style.setProperty('outline-offset', '0', 'important');
          }
          to[index].removeAttribute('data-word-image-zoom');
          to[index].removeAttribute('tabindex');
          to[index].classList.remove('cv7991-presentation-image-frame', 'word-presentation-direct-zoom', 'cv7991-shape-overlap');
        });
        stage.dataset.sourceWidth = String(width);
        stage.dataset.sourceHeight = String(height);
        clone.style.setProperty('position', 'absolute', 'important');
        clone.style.setProperty('left', '0', 'important');
        clone.style.setProperty('top', '0', 'important');
        clone.style.setProperty('margin', '0', 'important');
        clone.style.setProperty('width', width + 'px', 'important');
        clone.style.setProperty('height', height + 'px', 'important');
        clone.style.setProperty('max-width', 'none', 'important');
        clone.style.setProperty('max-height', 'none', 'important');
        clone.style.setProperty('pointer-events', 'none', 'important');
        stage.appendChild(clone);
        wpRemoveDuplicateIdsFromZoomClone(stage);
        return stage;
      }
      if (source instanceof HTMLTableElement) {
        const from = [source, ...source.querySelectorAll('*')];
        const to = [clone, ...clone.querySelectorAll('*')];
        const properties = ['font-family', 'font-size', 'font-weight', 'font-style',
          'line-height', 'color', 'background-color', 'text-align', 'vertical-align',
          'white-space', 'border-collapse', 'border-spacing', 'table-layout',
          'padding-top', 'padding-right', 'padding-bottom', 'padding-left',
          'border-top', 'border-right', 'border-bottom', 'border-left'];
        from.forEach((node, index) => {
          const style = getComputedStyle(node);
          properties.forEach((key) => to[index].style.setProperty(key, style.getPropertyValue(key), 'important'));
        });
        clone.classList.remove('cv7991-presentation-image-frame');
        clone.style.setProperty('display', 'table', 'important');
        clone.style.setProperty('position', 'absolute', 'important');
        clone.style.setProperty('left', '0', 'important');
        clone.style.setProperty('top', '0', 'important');
        clone.style.setProperty('margin', '0', 'important');
        clone.style.setProperty('max-width', 'none', 'important');
        clone.style.setProperty('max-height', 'none', 'important');
        clone.style.setProperty('transform-origin', 'top left', 'important');
      }
      cv7991SetMediaZoomOutline(clone, false);
      clone.removeAttribute('data-word-image-zoom');
      clone.removeAttribute('tabindex');
      clone.removeAttribute('role');
      clone.removeAttribute('title');
      clone.classList.remove('word-presentation-direct-zoom');
      clone.querySelectorAll('[data-word-image-zoom]').forEach((node) => {
        cv7991SetMediaZoomOutline(node, false);
        node.removeAttribute('data-word-image-zoom');
        node.removeAttribute('tabindex');
        node.removeAttribute('role');
        node.removeAttribute('title');
        node.classList.remove('word-presentation-direct-zoom');
      });
      wpRemoveDuplicateIdsFromZoomClone(clone);
      return clone;
    }

    function wpZoomVisualAspect(source) {
      if (!(source instanceof Element)) return { width: 1, height: 1 };
      const rect = source.getBoundingClientRect();
      let width = Math.max(1, Number(rect.width) || Number(source.clientWidth) || Number(source.scrollWidth) || 1);
      let height = Math.max(1, Number(rect.height) || Number(source.clientHeight) || Number(source.scrollHeight) || 1);
      if (source instanceof HTMLImageElement && source.naturalWidth > 0 && source.naturalHeight > 0) {
        width = source.naturalWidth;
        height = source.naturalHeight;
      } else if (source instanceof HTMLTableElement || source.matches('.mvip-office-object, .mvip-office-inline-object, [data-cv7991-pptx-kind], .single-exam-word-group-figure, .single-exam-inline-vector')) {
        width = Math.max(1, source.offsetWidth || width);
        height = Math.max(1, source.offsetHeight || height);
      } else if (source.tagName === 'SVG') {
        const viewBox = source.viewBox && source.viewBox.baseVal;
        if (viewBox && viewBox.width > 0 && viewBox.height > 0) {
          width = viewBox.width;
          height = viewBox.height;
        }
      } else {
        const svg = source.querySelector('svg');
        const viewBox = svg && svg.viewBox && svg.viewBox.baseVal;
        if (viewBox && viewBox.width > 0 && viewBox.height > 0) {
          width = viewBox.width;
          height = viewBox.height;
        }
      }
      return { width: Math.max(1, width), height: Math.max(1, height) };
    }

    let wpImageZoomEscapeLocked = false;

    function wpUnlockImageZoomEscape() {
      const keyboard = navigator && navigator.keyboard;
      if (!keyboard || typeof keyboard.unlock !== 'function') {
        wpImageZoomEscapeLocked = false;
        return;
      }
      try { keyboard.unlock(); } catch (_) {}
      wpImageZoomEscapeLocked = false;
    }

    function wpLockImageZoomEscape() {
      const keyboard = navigator && navigator.keyboard;
      if (!keyboard || typeof keyboard.lock !== 'function' || imageZoomModal.hidden) return;
      try {
        const pending = keyboard.lock(['Escape']);
        if (pending && typeof pending.then === 'function') {
          pending.then(() => {
            if (imageZoomModal.hidden) wpUnlockImageZoomEscape();
            else wpImageZoomEscapeLocked = true;
          }).catch(() => { wpImageZoomEscapeLocked = false; });
        } else {
          wpImageZoomEscapeLocked = true;
        }
      } catch (_) {
        wpImageZoomEscapeLocked = false;
      }
    }

    function wpCloseImageZoom() {
      wpUnlockImageZoomEscape();
      document.body.classList.remove('presentation-image-zoom-open');
      if (imageZoomModal.hidden) return;
      imageZoomModal.hidden = true;
      imageZoomModal.setAttribute('aria-hidden', 'true');
      imageZoomContentEl.innerHTML = '';
      imageZoomContentEl.style.width = '';
      imageZoomContentEl.style.height = '';
      imageZoomTitleEl.textContent = 'Hình ảnh phóng to';
    }

    function wpRequestImageZoomFullscreen(zoomHost) {
      if (!(zoomHost instanceof HTMLElement)) return null;
      const fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || null;
      if (fullscreenElement === zoomHost) return Promise.resolve(true);
      if (fullscreenElement && fullscreenElement !== zoomHost) return Promise.resolve(false);

      if (zoomHost === presenter) return wpEnsureFullscreen();

      const applySingleExamFallback = () => {
        if (zoomHost.id !== 'singleExamPresenter') return false;
        document.body.classList.add('single-exam-fullscreen-fallback');
        zoomHost.classList.add('single-exam-expanded');
        try {
          if (typeof updateSingleExamFullscreenButton === 'function') updateSingleExamFullscreenButton();
          if (typeof scheduleRegularTestWordFullscreenTransitionFit === 'function') scheduleRegularTestWordFullscreenTransitionFit();
        } catch (_) {}
        return true;
      };

      try {
        const request = zoomHost.requestFullscreen || zoomHost.webkitRequestFullscreen;
        if (typeof request !== 'function') return Promise.resolve(applySingleExamFallback());
        const result = request.call(zoomHost);
        if (result && typeof result.then === 'function') {
          return result.then(() => true, () => applySingleExamFallback());
        }
        return Promise.resolve(true);
      } catch (_) {
        return Promise.resolve(applySingleExamFallback());
      }
    }

    function wpOpenImageZoom(source, hostRoot = null) {
      if (!(source instanceof Element)) return;
      if (!cv7991CanZoomObject(source)) return;
      const visual = wpCloneZoomVisual(source);
      if (!visual) return;
      wpResetRegionTool();
      wpCloseImageZoom();

      /* Fullscreen API chỉ bảo đảm hiển thị phần tử fullscreen và các phần tử con.
         Vì vậy modal được đưa vào đúng presenter đang mở (Word hoặc MVIP), thay vì
         để cố định ngoài body rồi biến mất khi người dùng bấm Toàn màn hình. */
      const inferredHost = source.closest('#singleExamPresenter, #wordPresentationPresenter') || presenter;
      const zoomHost = hostRoot instanceof Element ? hostRoot : inferredHost;
      const fullscreenPending = wpRequestImageZoomFullscreen(zoomHost);
      if (zoomHost instanceof Element && imageZoomModal.parentElement !== zoomHost) {
        zoomHost.appendChild(imageZoomModal);
      }

      const aspect = wpZoomVisualAspect(source);
      const fitZoomContentToViewport = () => {
        /* Khi đang chia đôi, ảnh phóng to được đặt trong nửa phải. Tính kích
           thước từ chính khung đó thay vì từ toàn bộ cửa sổ, nếu không giá trị
           inline ở đây sẽ làm ảnh tràn khỏi đường chia đôi dù CSS đã giới hạn. */
        const splitPanel = document.getElementById('mvipWhiteboardPanel');
        const splitActive = splitPanel instanceof HTMLElement
          && splitPanel.classList.contains('is-split')
          && !splitPanel.hidden;
        const splitRect = splitActive ? splitPanel.getBoundingClientRect() : null;
        const availableWidth = splitRect && splitRect.width > 0 ? splitRect.width : window.innerWidth;
        const availableHeight = splitRect && splitRect.height > 0 ? splitRect.height : window.innerHeight;
        const dialogWidth = Math.max(180, Math.min(availableWidth - 44, 1860));
        const dialogHeight = Math.max(120, Math.min(availableHeight - 102, 980));
        const ratio = Math.max(.03, aspect.width / aspect.height);
        let targetWidth = dialogWidth;
        let targetHeight = targetWidth / ratio;
        if (targetHeight > dialogHeight) {
          targetHeight = dialogHeight;
          targetWidth = targetHeight * ratio;
        }
        targetWidth = Math.max(180, Math.floor(targetWidth));
        targetHeight = Math.max(120, Math.floor(targetHeight));
        imageZoomContentEl.style.width = `${targetWidth}px`;
        imageZoomContentEl.style.height = `${targetHeight}px`;
        if (source instanceof HTMLTableElement || visual.classList.contains('cv7991-native-zoom-stage')) {
          visual.style.setProperty('position', 'absolute', 'important');
          visual.style.setProperty('left', '0', 'important');
          visual.style.setProperty('top', '0', 'important');
          visual.style.setProperty('transform-origin', 'top left', 'important');
          const scale = Math.min(targetWidth / aspect.width, targetHeight / aspect.height);
          visual.style.setProperty('width', `${aspect.width}px`, 'important');
          visual.style.setProperty('height', `${aspect.height}px`, 'important');
          visual.style.setProperty('transform', `scale(${scale})`, 'important');
        }
      };

      imageZoomContentEl.innerHTML = '';
      fitZoomContentToViewport();
      imageZoomContentEl.appendChild(visual);
      const alt = source instanceof HTMLImageElement ? String(source.alt || '').trim() : '';
      imageZoomTitleEl.textContent = alt && !/^hình minh họa$/i.test(alt) ? alt : 'Hình ảnh phóng to';
      imageZoomBodyEl.scrollTop = 0;
      imageZoomBodyEl.scrollLeft = 0;
      imageZoomModal.hidden = false;
      imageZoomModal.setAttribute('aria-hidden', 'false');
      document.body.classList.add('presentation-image-zoom-open');
      const settleZoomAfterFullscreen = () => {
        fitZoomContentToViewport();
        imageZoomBodyEl.scrollTop = Math.max(0, (imageZoomBodyEl.scrollHeight - imageZoomBodyEl.clientHeight) / 2);
        imageZoomBodyEl.scrollLeft = Math.max(0, (imageZoomBodyEl.scrollWidth - imageZoomBodyEl.clientWidth) / 2);
      };
      requestAnimationFrame(() => {
        settleZoomAfterFullscreen();
        try { imageZoomCloseBtn.focus({ preventScroll: true }); } catch (_) {}
      });
      if (fullscreenPending && typeof fullscreenPending.then === 'function') {
        fullscreenPending.then(() => {
          settleZoomAfterFullscreen();
          wpLockImageZoomEscape();
        }, settleZoomAfterFullscreen);
      } else {
        wpLockImageZoomEscape();
      }
      [90, 240, 520].forEach((delay) => setTimeout(settleZoomAfterFullscreen, delay));
    }


    function wpSetSourceStatus(message = '', type = '') {
      sourceStatusEl.textContent = String(message || '');
      sourceStatusEl.className = 'regular-choice-status' + (type ? ` ${type}` : '');
    }

    function wpSetDocumentModeStatus(message = '', type = '') {
      documentModeStatusEl.textContent = String(message || '');
      documentModeStatusEl.className = 'regular-choice-status' + (type ? ` ${type}` : '');
    }

    function wpRefreshSourceModalLock() {
      const anyOpen = !documentModeModal.hidden || !sourceModal.hidden || !sampleModal.hidden;
      document.documentElement.classList.toggle('word-presentation-source-modal-open', anyOpen);
    }

    function wpOpenDocumentModeModal() {
      if (wpState.busy) return;
      wpSetDocumentModeStatus('', '');
      documentModeModal.hidden = false;
      sourceModal.hidden = true;
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      requestAnimationFrame(() => {
        try { documentQuestionBtn.focus({ preventScroll: true }); } catch (_) {}
      });
    }

    function wpCloseDocumentModeModal(returnFocus = true) {
      documentModeModal.hidden = true;
      wpRefreshSourceModalLock();
      if (returnFocus) {
        try { startBtn.focus({ preventScroll: true }); } catch (_) {}
      }
    }

    function wpChooseQuestionPresentation() {
      wpCloseDocumentModeModal(false);
      wpOpenSourceModal();
    }

    function wpOpenOrdinaryDocumentPicker() {
      if (wpState.busy) return;
      wpPrimePowerPointAudio();
      ordinaryFileInput.value = '';
      wpSetDocumentModeStatus('Chọn file PowerPoint, Word, PDF hoặc Excel cần trình chiếu.', '');
      if (typeof ordinaryFileInput.showPicker === 'function') {
        try { ordinaryFileInput.showPicker(); return; } catch (_) {}
      }
      ordinaryFileInput.click();
    }

    function wpOpenPowerPointPicker() {
      if (wpState.busy) return;
      wpPrimePowerPointAudio();
      powerPointFileInput.value = '';
      wpSetDocumentModeStatus('Chọn file PowerPoint (.pptx hoặc .pptm) để trình chiếu từng slide.', '');
      if (typeof powerPointFileInput.showPicker === 'function') {
        try { powerPointFileInput.showPicker(); return; } catch (_) {}
      }
      powerPointFileInput.click();
    }

    function wpOpenSourceModal() {
      if (wpState.busy) return;
      wpSetSourceStatus('', '');
      sourceModal.hidden = false;
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      requestAnimationFrame(() => {
        try { sourceLocalBtn.focus({ preventScroll: true }); } catch (_) {}
      });
    }

    function wpCloseSourceModal() {
      sourceModal.hidden = true;
      wpRefreshSourceModalLock();
      try { startBtn.focus({ preventScroll: true }); } catch (_) {}
    }

    function wpOpenSampleModal() {
      sampleModal.hidden = false;
      wpRefreshSourceModalLock();
      requestAnimationFrame(() => {
        try { sampleCloseBtn.focus({ preventScroll: true }); } catch (_) {}
      });
    }

    function wpCloseSampleModal() {
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      if (!sourceModal.hidden) {
        try { sourceSampleBtn.focus({ preventScroll: true }); } catch (_) {}
      }
    }

    function wpOpenWordPicker() {
      if (wpState.busy) return;
      fileInput.value = '';
      wpSetSourceStatus('Chọn file Word chứa câu hỏi cần trình chiếu.', '');
      if (typeof fileInput.showPicker === 'function') {
        try { fileInput.showPicker(); return; } catch (_) {}
      }
      fileInput.click();
    }

    function wpNotify(message) {
      const text = String(message || 'Không thực hiện được trình chiếu Word.');
      if (typeof openAlertModal === 'function') openAlertModal(text, 'Thông báo');
      else window.alert(text);
    }

    const wpExternalScriptPromises = new Map();

    function wpLoadExternalScript(id, src) {
      if (wpExternalScriptPromises.has(id)) return wpExternalScriptPromises.get(id);
      const promise = new Promise((resolve, reject) => {
        const existing = document.getElementById(id);
        if (existing instanceof HTMLScriptElement) {
          if (existing.dataset.loaded === '1') {
            resolve(existing);
            return;
          }
          existing.addEventListener('load', () => resolve(existing), { once: true });
          existing.addEventListener('error', () => reject(new Error('Không tải được thư viện trình chiếu tài liệu.')), { once: true });
          return;
        }
        const script = document.createElement('script');
        script.id = id;
        script.src = src;
        script.async = true;
        script.addEventListener('load', () => {
          script.dataset.loaded = '1';
          resolve(script);
        }, { once: true });
        script.addEventListener('error', () => reject(new Error('Không tải được thư viện trình chiếu tài liệu. Bạn kiểm tra Internet rồi thử lại.')), { once: true });
        document.head.appendChild(script);
      });
      wpExternalScriptPromises.set(id, promise);
      return promise;
    }

    async function wpEnsurePdfRenderer() {
      if (!window.pdfjsLib || typeof window.pdfjsLib.getDocument !== 'function') {
        await wpLoadExternalScript(
          'mvip-pdfjs-3-11-174',
          'https://unpkg.com/pdfjs-dist@3.11.174/build/pdf.min.js'
        );
      }
      if (!window.pdfjsLib || typeof window.pdfjsLib.getDocument !== 'function') {
        throw new Error('Không khởi tạo được bộ trình chiếu PDF.');
      }
      window.pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://unpkg.com/pdfjs-dist@3.11.174/build/pdf.worker.min.js';
      return window.pdfjsLib;
    }

    async function wpEnsureDocxPreviewRenderer() {
      if (window.mvipDocxPreview && typeof window.mvipDocxPreview.renderAsync === 'function') {
        return window.mvipDocxPreview;
      }
      const docxGenerator = window.docx;
      await wpLoadExternalScript(
        'mvip-docx-preview-0-3-6',
        'https://unpkg.com/docx-preview@0.3.6/dist/docx-preview.min.js'
      );
      const preview = window.docx;
      if (!preview || typeof preview.renderAsync !== 'function') {
        if (docxGenerator) window.docx = docxGenerator;
        throw new Error('Không khởi tạo được bộ trình chiếu Word nguyên trang.');
      }
      window.mvipDocxPreview = preview;
      if (docxGenerator && docxGenerator !== preview) window.docx = docxGenerator;
      return preview;
    }

    async function wpEnsureSpreadsheetRenderer() {
      if (!window.XLSX || typeof window.XLSX.read !== 'function') {
        await wpLoadExternalScript(
          'mvip-sheetjs-0-20-3',
          'https://cdn.sheetjs.com/xlsx-0.20.3/package/dist/xlsx.full.min.js'
        );
      }
      if (!window.XLSX || typeof window.XLSX.read !== 'function'
        || !window.XLSX.utils || typeof window.XLSX.utils.sheet_to_html !== 'function') {
        throw new Error('Không khởi tạo được bộ trình chiếu Excel.');
      }
      return window.XLSX;
    }

    let wpPptxRendererPromise = null;

    async function wpEnsurePptxRenderer() {
      if (!wpPptxRendererPromise) {
        wpPptxRendererPromise = import('https://cdn.jsdelivr.net/npm/@aiden0z/pptx-renderer@1.2.4/dist/aiden0z-pptx-renderer.browser.es.js')
          .then((module) => {
            const Viewer = module && (module.PptxViewer
              || (module.default && module.default.PptxViewer)
              || module.default);
            if (!Viewer || typeof Viewer.open !== 'function') {
              throw new Error('Không khởi tạo được bộ trình chiếu PowerPoint.');
            }
            return Viewer;
          })
          .catch((error) => {
            wpPptxRendererPromise = null;
            if (error && /Không khởi tạo/.test(String(error.message || ''))) throw error;
            throw new Error('Không tải được bộ trình chiếu PowerPoint. Bạn kiểm tra Internet rồi thử lại.');
          });
      }
      return wpPptxRendererPromise;
    }

    function wpPptxXmlElements(root, localName) {
      if (!root || typeof root.getElementsByTagName !== 'function') return [];
      return Array.from(root.getElementsByTagName('*'))
        .filter((element) => String(element.localName || element.nodeName || '').split(':').pop() === localName);
    }

    function wpPptxDuration(value, fallback = 520) {
      const raw = String(value == null ? '' : value).trim();
      if (!raw || raw === 'indefinite') return fallback;
      const number = Number(raw.replace(/ms$/i, ''));
      /* PowerPoint thường lưu một số hiệu ứng nhấn/chọn với dur=2000 ms.
         Trên trình duyệt, quãng mờ dài này tạo cảm giác bấm gần 2 giây mới
         nhận lệnh. Chỉ giới hạn thời lượng chuyển động hình ảnh; âm thanh,
         video và đồng hồ vẫn chạy theo thời lượng nguồn riêng của chúng. */
      return Number.isFinite(number) ? Math.max(80, Math.min(520, number)) : fallback;
    }

    function wpPptxTransitionFromXml(documentXml) {
      const transition = wpPptxXmlElements(documentXml, 'transition')[0];
      if (!transition) return { kind: 'none', direction: '', duration: 0, advanceAfter: 0 };
      const effectNode = Array.from(transition.children || [])
        .find((child) => !['sndAc', 'extLst'].includes(String(child.localName || child.nodeName || '').split(':').pop()));
      const rawKind = effectNode ? String(effectNode.localName || effectNode.nodeName || '').split(':').pop() : 'fade';
      const direction = String((effectNode && (effectNode.getAttribute('dir')
        || effectNode.getAttribute('orient'))) || '').toLowerCase();
      const speed = String(transition.getAttribute('spd') || '').toLowerCase();
      const duration = speed === 'slow' ? 1000 : (speed === 'fast' ? 320 : 560);
      const advanceAfter = Math.max(0, Number(transition.getAttribute('advTm')) || 0);
      let kind = 'fade';
      if (['push', 'pull', 'cover', 'uncover'].includes(rawKind)) kind = 'push';
      else if (['wipe', 'split', 'strips', 'randomBar'].includes(rawKind)) kind = 'wipe';
      else if (['zoom', 'newsflash'].includes(rawKind)) kind = 'zoom';
      else if (rawKind === 'cut' || rawKind === 'none') kind = 'none';
      return { kind, direction, duration, advanceAfter };
    }

    function wpPptxEffectTrigger(effectNode) {
      let current = effectNode;
      while (current && current.nodeType === 1) {
        const nodeType = String(current.getAttribute && current.getAttribute('nodeType') || '');
        if (['clickEffect', 'withEffect', 'afterEffect'].includes(nodeType)) return nodeType;
        current = current.parentElement;
      }
      return 'clickEffect';
    }

    function wpPptxInsideInteractiveSequence(effectNode) {
      let current = effectNode;
      while (current && current.nodeType === 1) {
        const localName = String(current.localName || current.nodeName || '').split(':').pop();
        if (localName === 'cTn' && current.getAttribute('nodeType') === 'interactiveSeq') return true;
        current = current.parentElement;
      }
      return false;
    }

    function wpPptxFirstShapeTarget(root) {
      const target = wpPptxXmlElements(root, 'spTgt')[0];
      return target ? String(target.getAttribute('spid') || '').trim() : '';
    }

    function wpPptxParagraphRange(root) {
      const range = wpPptxXmlElements(root, 'pRg')[0];
      if (!range) return null;
      const start = Number(range.getAttribute('st'));
      const end = Number(range.getAttribute('end'));
      if (!Number.isInteger(start) || start < 0) return null;
      return {
        start,
        end: Number.isInteger(end) && end >= start ? end : start,
      };
    }

    function wpPptxAttributeName(root) {
      const attribute = wpPptxXmlElements(root, 'attrName')[0];
      return String(attribute && attribute.textContent || '').trim().toLowerCase();
    }

    function wpPptxColorValue(root) {
      const colorNames = ['srgbClr', 'schemeClr', 'prstClr', 'sysClr'];
      for (const colorName of colorNames) {
        const color = wpPptxXmlElements(root, colorName)[0];
        if (!color) continue;
        const value = String(color.getAttribute('val') || color.getAttribute('lastClr') || '').trim();
        if (value) return { kind: colorName, value };
      }
      return null;
    }

    function wpPptxSetValue(root) {
      const valueNames = ['strVal', 'boolVal', 'intVal', 'fltVal'];
      for (const valueName of valueNames) {
        const valueNode = wpPptxXmlElements(root, valueName)[0];
        if (valueNode) return String(valueNode.getAttribute('val') || '').trim();
      }
      return '';
    }

    function wpPptxActionsFromContainer(container, documentXml = null) {
      const actions = [];
      wpPptxXmlElements(container, 'animClr').forEach((colorNode) => {
        const targetShapeId = wpPptxFirstShapeTarget(colorNode);
        const color = wpPptxColorValue(colorNode);
        if (!targetShapeId || !color) return;
        actions.push({
          type: 'color',
          targetShapeId,
          attributeName: wpPptxAttributeName(colorNode) || 'fillcolor',
          color,
        });
      });
      wpPptxXmlElements(container, 'set').forEach((setNode) => {
        const targetShapeId = wpPptxFirstShapeTarget(setNode);
        const attributeName = wpPptxAttributeName(setNode);
        if (!targetShapeId || !attributeName) return;
        actions.push({
          type: 'set',
          targetShapeId,
          attributeName,
          value: wpPptxSetValue(setNode),
        });
      });
      wpPptxXmlElements(container, 'cmd').forEach((commandNode) => {
        const targetShapeId = wpPptxFirstShapeTarget(commandNode);
        if (!targetShapeId) return;
        actions.push({
          type: 'media',
          targetShapeId,
          command: String(commandNode.getAttribute('cmd') || 'playFrom(0.0)').trim(),
        });
      });
      const soundRelationshipIds = new Set();
      wpPptxXmlElements(container, 'audio').forEach((audioNode) => {
        const soundTarget = wpPptxXmlElements(audioNode, 'sndTgt')[0];
        const relationshipId = wpPptxRelationshipId(soundTarget, 'embed')
          || wpPptxRelationshipId(soundTarget, 'link');
        if (!relationshipId || soundRelationshipIds.has(relationshipId)) return;
        soundRelationshipIds.add(relationshipId);
        actions.push({ type: 'sound', relationshipId });
      });
      const animationTimeNodes = [];
      const containerName = String(container && (container.localName || container.nodeName) || '')
        .split(':').pop();
      if (containerName === 'cTn') animationTimeNodes.push(container);
      wpPptxXmlElements(container, 'cTn').forEach((timeNode) => animationTimeNodes.push(timeNode));
      animationTimeNodes.forEach((timeNode) => {
        const presetClass = String(timeNode.getAttribute('presetClass') || '').toLowerCase();
        if (!['entr', 'exit', 'emph'].includes(presetClass)) return;
        const targetShapeId = wpPptxFirstShapeTarget(timeNode);
        if (!targetShapeId) return;
        actions.push({
          type: 'animation',
          targetShapeId,
          presetClass,
          presetId: Number(timeNode.getAttribute('presetID')) || 0,
          presetSubtype: String(timeNode.getAttribute('presetSubtype') || '').toLowerCase(),
          duration: wpPptxDuration(timeNode.getAttribute('dur'), 520),
          repeatIndefinitely: String(timeNode.getAttribute('repeatCount') || '').toLowerCase() === 'indefinite',
        });
      });
      /* Lưu tọa độ gốc của đích cùng hành động. Đây là mốc kiểm chứng ổn
         định hơn thứ tự phần tử DOM khi slide có mc:Choice/Fallback hoặc
         Office Math và bộ dựng hoàn tất các nhánh đó ở thời điểm khác nhau. */
      if (documentXml) {
        const detailsById = new Map();
        actions.forEach((action) => {
          const targetShapeId = String(action && action.targetShapeId || '').trim();
          if (!targetShapeId) return;
          let details = detailsById.get(targetShapeId);
          if (!details) {
            const properties = wpPptxXmlElements(documentXml, 'cNvPr')
              .find((entry) => String(entry.getAttribute('id') || '').trim() === targetShapeId);
            details = wpPptxShapeDetailsFromNode(properties);
            detailsById.set(targetShapeId, details || {});
          }
          if (details && details.bounds) action.targetBounds = { ...details.bounds };
        });
      }
      return actions;
    }

    function wpPptxInteractiveTriggersFromXml(documentXml) {
      const triggers = [];
      wpPptxXmlElements(documentXml, 'cTn').forEach((timeNode) => {
        if (String(timeNode.getAttribute('nodeType') || '') !== 'interactiveSeq') return;
        let triggerShapeId = '';
        const conditionLists = Array.from(timeNode.children || []).filter((child) => {
          const localName = String(child.localName || child.nodeName || '').split(':').pop();
          return localName === 'stCondLst';
        });
        conditionLists.some((conditionList) => wpPptxXmlElements(conditionList, 'cond').some((condition) => {
          if (String(condition.getAttribute('evt') || '') !== 'onClick') return false;
          triggerShapeId = wpPptxFirstShapeTarget(condition);
          return !!triggerShapeId;
        }));
        if (!triggerShapeId) return;
        const actions = wpPptxActionsFromContainer(timeNode, documentXml);
        if (actions.length) {
          const triggerProperties = wpPptxXmlElements(documentXml, 'cNvPr')
            .find((properties) => String(properties.getAttribute('id') || '').trim() === triggerShapeId);
          const shapeDetails = wpPptxShapeDetailsFromNode(triggerProperties);
          triggers.push({
            triggerShapeId,
            shapeName: shapeDetails.name,
            shapeText: shapeDetails.text,
            bounds: shapeDetails.bounds,
            actions,
          });
        }
      });
      return triggers;
    }

    function wpPptxHiddenShapeIdsFromXml(documentXml) {
      const hiddenShapeIds = [];
      wpPptxXmlElements(documentXml, 'cNvPr').forEach((properties) => {
        const hidden = String(properties.getAttribute('hidden') || '').trim().toLowerCase();
        if (!['1', 'true'].includes(hidden)) return;
        const shapeId = String(properties.getAttribute('id') || '').trim();
        if (shapeId && !hiddenShapeIds.includes(shapeId)) hiddenShapeIds.push(shapeId);
      });
      return hiddenShapeIds;
    }

    function wpPptxInteractiveEntranceShapeIdsFromXml(documentXml) {
      const shapeIds = [];
      wpPptxXmlElements(documentXml, 'cTn').forEach((timeNode) => {
        if (String(timeNode.getAttribute('presetClass') || '').toLowerCase() !== 'entr'
          || !wpPptxInsideInteractiveSequence(timeNode)) return;
        const shapeId = wpPptxFirstShapeTarget(timeNode);
        if (shapeId && !shapeIds.includes(shapeId)) shapeIds.push(shapeId);
      });
      return shapeIds;
    }

    function wpPptxAnswerLabelShapeIdsFromXml(documentXml, slideSize) {
      const shapeIds = [];
      const slideWidth = Math.max(1, Number(slideSize && slideSize.width) || 12192000);
      const slideHeight = Math.max(1, Number(slideSize && slideSize.height) || 6858000);
      wpPptxXmlElements(documentXml, 'cNvPr').forEach((properties) => {
        const details = wpPptxShapeDetailsFromNode(properties);
        const label = String(details.text || '').replace(/\s+/g, '').toUpperCase();
        const bounds = details.bounds;
        if (!/^[ABCD]$/.test(label) || !bounds
          || Number(bounds.cx) > slideWidth * .04
          || Number(bounds.cy) > slideHeight * .08) return;
        if (details.id && !shapeIds.includes(details.id)) shapeIds.push(details.id);
      });
      return shapeIds;
    }

    function wpPptxAnimationGroupsFromXml(documentXml) {
      const effects = [];
      wpPptxXmlElements(documentXml, 'cTn').forEach((timeNode) => {
        const presetClass = String(timeNode.getAttribute('presetClass') || '').toLowerCase();
        if (!['entr', 'exit', 'emph', 'mediacall'].includes(presetClass)
          || wpPptxInsideInteractiveSequence(timeNode)) return;
        const nodeId = wpPptxFirstShapeTarget(timeNode);
        if (!nodeId) return;
        const nodeProperties = wpPptxXmlElements(documentXml, 'cNvPr')
          .find((properties) => String(properties.getAttribute('id') || '').trim() === nodeId);
        const shapeDetails = wpPptxShapeDetailsFromNode(nodeProperties);
        const outlineNode = shapeDetails.shape
          ? wpPptxXmlElements(shapeDetails.shape, 'ln')[0] : null;
        const hasRedOutline = !!(outlineNode
          && wpPptxXmlElements(outlineNode, 'srgbClr').some((colorNode) => {
            const value = String(colorNode.getAttribute('val') || '')
              .replace(/^#/, '').trim().toUpperCase();
            if (!/^[0-9A-F]{6}$/.test(value)) return false;
            const red = parseInt(value.slice(0, 2), 16);
            const green = parseInt(value.slice(2, 4), 16);
            const blue = parseInt(value.slice(4, 6), 16);
            return red >= 160 && green <= 80 && blue <= 80
              && red >= green * 2.2 && red >= blue * 2.2;
          }));
        /* PowerPoint không bắt buộc ghi prstDash="solid" cho đường liền.
           Vì vậy nhận diện mọi hình chữ nhật rỗng có viền đỏ đậm (C00000,
           FF0000...) làm khung đáp án, thay vì chỉ nhận riêng FF0000 có dash. */
        const answerHighlightKind = (() => {
          if (!(shapeDetails.shape && !shapeDetails.text
            && wpPptxXmlElements(shapeDetails.shape, 'noFill').length
            && hasRedOutline)) return '';
          const geometry = wpPptxXmlElements(shapeDetails.shape, 'prstGeom')
            .map((node) => String(node.getAttribute('prst') || '').toLowerCase())
            .find((value) => ['rect', 'ellipse'].includes(value));
          return geometry || '';
        })();
        const answerHighlight = answerHighlightKind === 'rect' && !!(shapeDetails.shape && !shapeDetails.text
          && wpPptxXmlElements(shapeDetails.shape, 'noFill').length
          && wpPptxXmlElements(shapeDetails.shape, 'prstGeom').some((geometry) => (
            String(geometry.getAttribute('prst') || '').toLowerCase() === 'rect'
          ))
          && hasRedOutline);
        const effect = {
          nodeId,
          shapeName: shapeDetails.name,
          shapeText: shapeDetails.text,
          shapeParagraphCount: shapeDetails.shape
            ? wpPptxDirectTextParagraphs(shapeDetails.shape).length : 0,
          paragraphRange: wpPptxParagraphRange(timeNode),
          bounds: shapeDetails.bounds,
          presetClass,
          presetId: Number(timeNode.getAttribute('presetID')) || 0,
          presetSubtype: String(timeNode.getAttribute('presetSubtype') || '').toLowerCase(),
          trigger: wpPptxEffectTrigger(timeNode),
          duration: wpPptxDuration(timeNode.getAttribute('dur'), 520),
          repeatIndefinitely: String(timeNode.getAttribute('repeatCount') || '').toLowerCase() === 'indefinite',
          answerHighlight,
          answerHighlightKind,
          actions: wpPptxActionsFromContainer(timeNode, documentXml),
          command: presetClass === 'mediacall'
            ? String((wpPptxXmlElements(timeNode, 'cmd')[0]
              && wpPptxXmlElements(timeNode, 'cmd')[0].getAttribute('cmd')) || 'playFrom(0.0)').trim()
            : '',
        };
        effects.push(effect);
      });
      const groups = [];
      effects.forEach((effect) => {
        if (!groups.length || effect.trigger === 'clickEffect') groups.push([]);
        groups[groups.length - 1].push(effect);
      });
      return groups.filter((group) => group.length);
    }

    /* Một số slide chứa nhiều ý a/b/c trong CÙNG một shape, nhưng pPr
       ghi 400% giãn dòng để chừa chỗ cho các hộp công thức đặt xen kẽ.
       HTML renderer không bảo toàn leadings lớn này => chữ đè công thức.
       Chỉ ghi nhận giãn dòng bất thường, không đụng đoạn văn bình thường. */
    function wpPptxSpacedParagraphsFromXml(documentXml) {
      const results = [];
      const visited = new Set();
      wpPptxXmlElements(documentXml, 'sp').forEach((shape) => {
        const details = wpPptxShapeDetailsFromNode(shape);
        if (!details.id || visited.has(details.id)) return;
        visited.add(details.id);
        const paragraphs = wpPptxDirectTextParagraphs(shape);
        if (paragraphs.length < 2) return;
        const lines = paragraphs.map((paragraph) => {
          const pPr = Array.from(paragraph.children || []).find((child) =>
            String(child.localName || child.nodeName || '').split(':').pop() === 'pPr');
          const spc = pPr ? wpPptxXmlElements(pPr, 'lnSpc')[0] : null;
          const percentage = spc ? wpPptxXmlElements(spc, 'spcPct')[0] : null;
          const ratio = Number(percentage && percentage.getAttribute('val')) / 100000;
          const fontSizes = wpPptxXmlElements(paragraph, 'rPr')
            .map((node) => Number(node.getAttribute('sz')) / 100)
            .filter((value) => Number.isFinite(value) && value > 0);
          const text = wpPptxXmlElements(paragraph, 't').map((node) => node.textContent || '').join('');
          return { text, ratio: Number.isFinite(ratio) ? ratio : 0,
            fontPt: fontSizes.length ? Math.max(...fontSizes) : 0 };
        });
        if (lines.some((line) => line.ratio >= 1.8 && line.ratio <= 6 && line.fontPt >= 8)) {
          results.push({ shapeId: details.id, lines });
        }
      });
      return results;
    }

    function wpPptxDirectTextParagraphs(shape) {
      if (!(shape instanceof Element)) return [];
      const textBody = Array.from(shape.children || []).find((child) => (
        String(child.localName || child.nodeName || '').split(':').pop() === 'txBody'
      ));
      return textBody ? Array.from(textBody.children || []).filter((child) => (
        String(child.localName || child.nodeName || '').split(':').pop() === 'p'
      )) : [];
    }

    async function wpPptxImageInkBands(zip, packagePath) {
      const file = packagePath && zip.file(packagePath);
      if (!file || typeof document === 'undefined') return null;
      let bitmap = null;
      let objectUrl = '';
      try {
        const bytes = await file.async('uint8array');
        const blob = new Blob([bytes], { type: wpPptxMimeType(packagePath) });
        if (typeof createImageBitmap === 'function') {
          bitmap = await createImageBitmap(blob);
        } else {
          objectUrl = URL.createObjectURL(blob);
          bitmap = await new Promise((resolve, reject) => {
            const image = new Image();
            image.onload = () => resolve(image);
            image.onerror = reject;
            image.src = objectUrl;
          });
        }
        const width = Math.max(1, Number(bitmap.width || bitmap.naturalWidth) || 1);
        const height = Math.max(1, Number(bitmap.height || bitmap.naturalHeight) || 1);
        const canvas = document.createElement('canvas');
        canvas.width = width;
        canvas.height = height;
        const context = canvas.getContext('2d', { willReadFrequently: true });
        if (!context) return null;
        context.clearRect(0, 0, width, height);
        context.drawImage(bitmap, 0, 0, width, height);
        const pixels = context.getImageData(0, 0, width, height).data;
        const corners = [[0, 0], [width - 1, 0], [0, height - 1], [width - 1, height - 1]]
          .map(([x, y]) => {
            const offset = ((y * width) + x) * 4;
            return [pixels[offset], pixels[offset + 1], pixels[offset + 2], pixels[offset + 3]];
          });
        const background = [0, 1, 2, 3].map((channel) => (
          corners.reduce((sum, color) => sum + color[channel], 0) / corners.length
        ));
        const minimumInk = Math.max(2, Math.round(width * .0005));
        const activeRows = new Array(height).fill(false);
        for (let y = 0; y < height; y += 1) {
          let ink = 0;
          for (let x = 0; x < width; x += 1) {
            const offset = ((y * width) + x) * 4;
            const alpha = pixels[offset + 3];
            if (alpha <= 12) continue;
            const alphaDelta = Math.abs(alpha - background[3]);
            const colorDelta = Math.abs(pixels[offset] - background[0])
              + Math.abs(pixels[offset + 1] - background[1])
              + Math.abs(pixels[offset + 2] - background[2]);
            if ((background[3] < 24 && alpha > 24) || alphaDelta > 28 || colorDelta > 72) ink += 1;
            if (ink >= minimumInk) break;
          }
          activeRows[y] = ink >= minimumInk;
        }
        const rawBands = [];
        for (let y = 0; y < height; y += 1) {
          if (!activeRows[y]) continue;
          const start = y;
          while (y + 1 < height && activeRows[y + 1]) y += 1;
          rawBands.push({ start, end: y });
        }
        const mergeGap = Math.max(4, Math.round(height * .009));
        const bands = [];
        rawBands.forEach((band) => {
          const previous = bands[bands.length - 1];
          if (previous && band.start - previous.end - 1 <= mergeGap) previous.end = band.end;
          else bands.push({ ...band });
        });
        return { width, height, bands };
      } catch (_) {
        return null;
      } finally {
        if (bitmap && typeof bitmap.close === 'function') {
          try { bitmap.close(); } catch (_) {}
        }
        if (objectUrl) URL.revokeObjectURL(objectUrl);
      }
    }

    function wpPptxParagraphLineAllocation(paragraphs, shape, imageInfo) {
      const bands = imageInfo && Array.isArray(imageInfo.bands) ? imageInfo.bands : [];
      if (!paragraphs.length || bands.length < paragraphs.length) return [];
      const details = wpPptxShapeDetailsFromNode(shape);
      const bodyProperties = wpPptxXmlElements(shape, 'bodyPr')[0];
      const horizontalInset = (Number(bodyProperties && bodyProperties.getAttribute('lIns')) || 91440)
        + (Number(bodyProperties && bodyProperties.getAttribute('rIns')) || 91440);
      const contentWidthPt = Math.max(30, ((Number(details.bounds && details.bounds.cx) || 0)
        - horizontalInset) / 12700);
      const loads = paragraphs.map((paragraph) => {
        const text = wpPptxXmlElements(paragraph, 't').map((node) => node.textContent || '').join('');
        const visualLength = Array.from(text).reduce((sum, character) => (
          sum + (/\s/.test(character) ? .45 : (/[ilI1.,;:'|]/.test(character) ? .45 : 1))
        ), 0);
        const fontSizes = wpPptxXmlElements(paragraph, 'rPr')
          .map((properties) => Number(properties.getAttribute('sz')) / 100)
          .filter((size) => Number.isFinite(size) && size > 0);
        const fontSizePt = fontSizes.length ? Math.max(...fontSizes) : 18;
        const capacity = Math.max(8, contentWidthPt / Math.max(4, fontSizePt * .52));
        return Math.max(.1, visualLength / capacity);
      });
      const counts = loads.map((load) => Math.max(1, Math.ceil(load)));
      let total = counts.reduce((sum, count) => sum + count, 0);
      while (total < bands.length) {
        let selected = 0;
        for (let index = 1; index < counts.length; index += 1) {
          if ((loads[index] / counts[index]) > (loads[selected] / counts[selected])) selected = index;
        }
        counts[selected] += 1;
        total += 1;
      }
      while (total > bands.length) {
        let selected = -1;
        for (let index = 0; index < counts.length; index += 1) {
          if (counts[index] <= 1) continue;
          if (selected < 0 || (loads[index] / (counts[index] - 1))
            < (loads[selected] / (counts[selected] - 1))) selected = index;
        }
        if (selected < 0) break;
        counts[selected] -= 1;
        total -= 1;
      }
      if (total !== bands.length) return [];
      let cursor = 0;
      return counts.map((count) => {
        const firstBand = cursor;
        const lastBand = cursor + count - 1;
        const top = firstBand === 0 ? 0
          : (bands[firstBand - 1].end + bands[firstBand].start) / 2;
        const bottom = lastBand === bands.length - 1 ? imageInfo.height
          : (bands[lastBand].end + bands[lastBand + 1].start) / 2;
        cursor += count;
        return {
          top: Math.max(0, Math.min(100, (top / imageInfo.height) * 100)),
          bottom: Math.max(0, Math.min(100, (bottom / imageInfo.height) * 100)),
        };
      });
    }

    async function wpPptxAttachFallbackParagraphSlices(zip, entry, documentXml, relationships, groups) {
      const effects = groups.flat().filter((effect) => effect && effect.paragraphRange);
      if (!effects.length) return groups;
      const imageCache = new Map();
      const alternateContents = wpPptxXmlElements(documentXml, 'AlternateContent');
      for (const alternateContent of alternateContents) {
        const branches = Array.from(alternateContent.children || []);
        const choice = branches.find((child) => String(child.localName || child.nodeName || '')
          .split(':').pop() === 'Choice');
        const fallback = branches.find((child) => String(child.localName || child.nodeName || '')
          .split(':').pop() === 'Fallback');
        if (!choice || !fallback) continue;
        const choiceShape = wpPptxXmlElements(choice, 'sp')[0];
        if (!(choiceShape instanceof Element)) continue;
        const choiceDetails = wpPptxShapeDetailsFromNode(choiceShape);
        const matchingEffects = effects.filter((effect) => String(effect.nodeId) === choiceDetails.id);
        if (!matchingEffects.length) continue;
        const fallbackShape = wpPptxXmlElements(fallback, 'sp').find((shape) => (
          wpPptxShapeDetailsFromNode(shape).id === choiceDetails.id
        )) || wpPptxXmlElements(fallback, 'sp')[0];
        if (!(fallbackShape instanceof Element)) continue;
        const blip = wpPptxXmlElements(fallbackShape, 'blip')[0];
        const relationshipId = wpPptxRelationshipId(blip, 'embed');
        const relationship = relationships.get(relationshipId);
        if (!relationship || /external/i.test(relationship.targetMode)) continue;
        const imagePath = wpPptxPackagePath(entry.path, relationship.target);
        let imageInfo = imageCache.get(imagePath);
        if (imageInfo === undefined) {
          imageInfo = await wpPptxImageInkBands(zip, imagePath);
          imageCache.set(imagePath, imageInfo || null);
        }
        if (!imageInfo) continue;
        const paragraphs = wpPptxDirectTextParagraphs(choiceShape);
        const slices = wpPptxParagraphLineAllocation(paragraphs, choiceShape, imageInfo);
        if (slices.length !== paragraphs.length) continue;
        matchingEffects.forEach((effect) => {
          const start = Math.max(0, Number(effect.paragraphRange.start) || 0);
          const end = Math.min(slices.length - 1,
            Math.max(start, Number(effect.paragraphRange.end) || start));
          if (!slices[start] || !slices[end]) return;
          effect.paragraphFallbackSlice = {
            top: slices[start].top,
            bottom: slices[end].bottom,
          };
          effect.shapeParagraphCount = paragraphs.length;
        });
      }
      return groups;
    }

    function wpPptxRelationshipMap(documentXml) {
      const relationships = new Map();
      wpPptxXmlElements(documentXml, 'Relationship').forEach((relationship) => {
        const id = String(relationship.getAttribute('Id') || '').trim();
        if (!id) return;
        relationships.set(id, {
          id,
          type: String(relationship.getAttribute('Type') || '').trim(),
          target: String(relationship.getAttribute('Target') || '').trim(),
          targetMode: String(relationship.getAttribute('TargetMode') || '').trim(),
        });
      });
      return relationships;
    }

    function wpPptxShapeIdFromNode(node) {
      let current = node instanceof Element ? node : null;
      const shapeNames = new Set(['sp', 'pic', 'graphicFrame', 'cxnSp', 'grpSp']);
      while (current) {
        const localName = String(current.localName || current.nodeName || '').split(':').pop();
        if (shapeNames.has(localName)) {
          const properties = wpPptxXmlElements(current, 'cNvPr')[0];
          const id = properties ? String(properties.getAttribute('id') || '').trim() : '';
          if (id) return id;
        }
        current = current.parentElement;
      }
      return '';
    }

    function wpPptxDirectTransform(shape) {
      if (!(shape instanceof Element)) return null;
      const localName = String(shape.localName || shape.nodeName || '').split(':').pop();
      const propertyName = localName === 'grpSp' ? 'grpSpPr'
        : (localName === 'graphicFrame' ? '' : 'spPr');
      let transform = null;
      if (propertyName) {
        const properties = Array.from(shape.children || []).find((child) => {
          const name = String(child.localName || child.nodeName || '').split(':').pop();
          return name === propertyName;
        });
        transform = properties
          ? Array.from(properties.children || []).find((child) => {
            const name = String(child.localName || child.nodeName || '').split(':').pop();
            return name === 'xfrm';
          })
          : null;
      } else {
        transform = Array.from(shape.children || []).find((child) => {
          const name = String(child.localName || child.nodeName || '').split(':').pop();
          return name === 'xfrm';
        });
      }
      if (!transform) transform = wpPptxXmlElements(shape, 'xfrm')[0] || null;
      return transform;
    }

    function wpPptxTransformValues(transform) {
      if (!(transform instanceof Element)) return null;
      const directChild = (name) => Array.from(transform.children || []).find((child) => {
        const localName = String(child.localName || child.nodeName || '').split(':').pop();
        return localName === name;
      });
      const off = directChild('off');
      const ext = directChild('ext');
      if (!off || !ext) return null;
      const values = {
        x: Number(off.getAttribute('x')) || 0,
        y: Number(off.getAttribute('y')) || 0,
        cx: Math.max(0, Number(ext.getAttribute('cx')) || 0),
        cy: Math.max(0, Number(ext.getAttribute('cy')) || 0),
      };
      const childOffset = directChild('chOff');
      const childExtent = directChild('chExt');
      if (childOffset && childExtent) {
        values.chX = Number(childOffset.getAttribute('x')) || 0;
        values.chY = Number(childOffset.getAttribute('y')) || 0;
        values.chCx = Math.max(0, Number(childExtent.getAttribute('cx')) || 0);
        values.chCy = Math.max(0, Number(childExtent.getAttribute('cy')) || 0);
      }
      return values;
    }

    function wpPptxShapeBounds(shape) {
      if (!(shape instanceof Element)) return null;
      let bounds = wpPptxTransformValues(wpPptxDirectTransform(shape));
      if (!bounds || !(bounds.cx > 0) || !(bounds.cy > 0)) return null;
      let parent = shape.parentElement;
      while (parent) {
        const localName = String(parent.localName || parent.nodeName || '').split(':').pop();
        if (localName === 'grpSp') {
          const group = wpPptxTransformValues(wpPptxDirectTransform(parent));
          if (group && group.chCx > 0 && group.chCy > 0) {
            const scaleX = group.cx / group.chCx;
            const scaleY = group.cy / group.chCy;
            bounds = {
              x: group.x + ((bounds.x - group.chX) * scaleX),
              y: group.y + ((bounds.y - group.chY) * scaleY),
              cx: bounds.cx * scaleX,
              cy: bounds.cy * scaleY,
            };
          }
        }
        parent = parent.parentElement;
      }
      return bounds;
    }

    function wpPptxShapeDetailsFromNode(node) {
      let current = node instanceof Element ? node : null;
      const shapeNames = new Set(['sp', 'pic', 'graphicFrame', 'cxnSp', 'grpSp']);
      while (current) {
        const localName = String(current.localName || current.nodeName || '').split(':').pop();
        if (shapeNames.has(localName)) {
          const properties = wpPptxXmlElements(current, 'cNvPr')[0];
          const id = properties ? String(properties.getAttribute('id') || '').trim() : '';
          if (id) {
            return {
              shape: current,
              id,
              name: String(properties.getAttribute('name') || '').trim(),
              text: wpPptxXmlElements(current, 't').map((textNode) => textNode.textContent || '')
                .join(' ').replace(/\s+/g, ' ').trim(),
              bounds: wpPptxShapeBounds(current),
            };
          }
        }
        current = current.parentElement;
      }
      return { shape: null, id: '', name: '', text: '', bounds: null };
    }

    function wpPptxRelationshipId(node, attributeName = 'id') {
      if (!(node instanceof Element)) return '';
      return String(node.getAttribute(`r:${attributeName}`)
        || node.getAttributeNS('http://schemas.openxmlformats.org/officeDocument/2006/relationships', attributeName)
        || '').trim();
    }

    function wpPptxPackagePath(basePath, targetPath) {
      const target = String(targetPath || '').replace(/\\/g, '/').trim();
      if (!target || /^NULL$/i.test(target)) return '';
      const parts = target.startsWith('/')
        ? []
        : String(basePath || '').replace(/\\/g, '/').split('/');
      if (parts.length) parts.pop();
      target.replace(/^\/+/, '').split('/').forEach((part) => {
        if (!part || part === '.') return;
        if (part === '..') parts.pop();
        else parts.push(part);
      });
      return parts.join('/');
    }

    function wpPptxMimeType(path) {
      const extension = String(path || '').split('.').pop().toLowerCase();
      const types = {
        mp4: 'video/mp4', m4v: 'video/mp4', webm: 'video/webm', mov: 'video/quicktime',
        wmv: 'video/x-ms-wmv', asf: 'video/x-ms-asf',
        mp3: 'audio/mpeg', m4a: 'audio/mp4', wav: 'audio/wav', aac: 'audio/aac', wma: 'audio/x-ms-wma',
        oga: 'audio/ogg', ogg: 'audio/ogg',
        png: 'image/png', jpg: 'image/jpeg', jpeg: 'image/jpeg', gif: 'image/gif',
        svg: 'image/svg+xml', webp: 'image/webp', bmp: 'image/bmp',
      };
      return types[extension] || 'application/octet-stream';
    }

    /* Lớp nhận dạng hình học dùng chung cho PowerPoint, Word và Excel.
       PowerPoint vốn đã làm việc theo shape/bounds; các bộ dựng Word/Excel
       bên dưới chuyển đối tượng Office về cùng mô hình này trước khi đặt DOM. */
    function wpOfficeLocalName(node) {
      return String(node && (node.localName || node.nodeName) || '')
        .split(':').pop().toLowerCase();
    }

    function wpOfficeXmlElements(root, localName = '') {
      if (!root || typeof root.getElementsByTagName !== 'function') return [];
      const wanted = String(localName || '').toLowerCase();
      return Array.from(root.getElementsByTagName('*')).filter((node) =>
        !wanted || wpOfficeLocalName(node) === wanted
      );
    }

    function wpOfficeXmlChildren(root, localName = '') {
      const wanted = String(localName || '').toLowerCase();
      return Array.from(root && root.childNodes || []).filter((node) =>
        node && node.nodeType === Node.ELEMENT_NODE
          && (!wanted || wpOfficeLocalName(node) === wanted)
      );
    }

    function wpOfficeXmlAttr(node, name, fallback = '') {
      if (!node || typeof node.getAttribute !== 'function') return fallback;
      const direct = node.getAttribute(name);
      if (direct != null) return direct;
      const wanted = String(name || '').toLowerCase();
      const attribute = Array.from(node.attributes || []).find((item) =>
        String(item && (item.localName || item.name) || '').split(':').pop().toLowerCase() === wanted
      );
      return attribute ? attribute.value : fallback;
    }

    function wpOfficeNumber(value, fallback = 0) {
      const parsed = Number(value);
      return Number.isFinite(parsed) ? parsed : (Number(fallback) || 0);
    }

    function wpOfficeEmuToPx(value) {
      return wpOfficeNumber(value) / 9525;
    }

    function wpOfficeCssLengthPx(value, fallback = 0) {
      const raw = String(value == null ? '' : value).trim();
      const match = raw.match(/^(-?\d*\.?\d+)\s*(pt|px|in|cm|mm|pc)?$/i);
      if (!match) return Number(fallback) || 0;
      const amount = Number(match[1]) || 0;
      const unit = String(match[2] || 'px').toLowerCase();
      const factors = { px:1, pt:96 / 72, in:96, cm:96 / 2.54, mm:96 / 25.4, pc:16 };
      return amount * (factors[unit] || 1);
    }

    function wpOfficeStyleMap(value) {
      const result = Object.create(null);
      String(value || '').split(';').forEach((part) => {
        const separator = part.indexOf(':');
        if (separator < 1) return;
        const name = part.slice(0, separator).trim().toLowerCase();
        const content = part.slice(separator + 1).trim();
        if (name) result[name] = content;
      });
      return result;
    }

    function wpOfficeThemeColors(themeDocument) {
      const result = Object.create(null);
      const colorScheme = wpOfficeXmlElements(themeDocument, 'clrScheme')[0]
        || wpOfficeXmlElements(themeDocument, 'clrscheme')[0];
      if (!colorScheme) return result;
      wpOfficeXmlChildren(colorScheme).forEach((slot) => {
        const name = wpOfficeLocalName(slot);
        const colorNode = wpOfficeXmlChildren(slot)[0];
        if (!name || !colorNode) return;
        let value = String(wpOfficeXmlAttr(colorNode, 'val', '')).replace(/^#/, '');
        if (!/^[0-9a-f]{6}$/i.test(value)) {
          value = String(wpOfficeXmlAttr(colorNode, 'lastClr', '')).replace(/^#/, '');
        }
        if (/^[0-9a-f]{6}$/i.test(value)) result[name] = `#${value.toLowerCase()}`;
      });
      if (result.dk1) result.tx1 = result.dk1;
      if (result.lt1) result.bg1 = result.lt1;
      if (result.dk2) result.tx2 = result.dk2;
      if (result.lt2) result.bg2 = result.lt2;
      return result;
    }

    function wpOfficeAdjustedColor(color, colorNode) {
      const source = String(color || '').replace(/^#/, '');
      if (!/^[0-9a-f]{6}$/i.test(source) || !colorNode) return color;
      let channels = [0, 2, 4].map((offset) => parseInt(source.slice(offset, offset + 2), 16));
      const modifier = (name) => {
        const node = wpOfficeXmlElements(colorNode, name)[0];
        const value = wpOfficeNumber(wpOfficeXmlAttr(node, 'val', ''));
        return value > 0 ? value / 100000 : null;
      };
      const tint = modifier('tint');
      const shade = modifier('shade');
      const lumMod = modifier('lummod');
      const lumOff = modifier('lumoff');
      if (shade != null) channels = channels.map((value) => value * shade);
      if (tint != null) channels = channels.map((value) => value + (255 - value) * tint);
      if (lumMod != null) channels = channels.map((value) => value * lumMod);
      if (lumOff != null) channels = channels.map((value) => value + 255 * lumOff);
      return `#${channels.map((value) => Math.max(0, Math.min(255, Math.round(value)))
        .toString(16).padStart(2, '0')).join('')}`;
    }

    function wpOfficeShapeColor(container, fallback = '', themeColors = null) {
      if (!container) return fallback;
      if (wpOfficeXmlChildren(container, 'nofill').length) return 'none';
      const solidFill = wpOfficeXmlChildren(container, 'solidfill')[0];
      const colorScope = solidFill || container;
      const colorNode = wpOfficeXmlElements(colorScope, 'srgbclr')[0];
      let value = String(wpOfficeXmlAttr(colorNode, 'val', '')).replace(/^#/, '');
      if (/^[0-9a-f]{8}$/i.test(value)) value = value.slice(2);
      if (/^[0-9a-f]{6}$/i.test(value)) return wpOfficeAdjustedColor(`#${value}`, colorNode);
      const schemeNode = wpOfficeXmlElements(colorScope, 'schemeclr')[0];
      const scheme = String(wpOfficeXmlAttr(schemeNode, 'val', '')).toLowerCase();
      const schemeColors = Object.assign({
        dk1:'#000000', lt1:'#ffffff', dk2:'#1f2937', lt2:'#f8fafc',
        accent1:'#4472c4', accent2:'#ed7d31', accent3:'#a5a5a5',
        accent4:'#ffc000', accent5:'#5b9bd5', accent6:'#70ad47',
        hlink:'#0563c1', folhlink:'#954f72', tx1:'#000000', bg1:'#ffffff',
      }, themeColors || {});
      return wpOfficeAdjustedColor(schemeColors[scheme] || fallback, schemeNode);
    }

    /* DrawingML preset chỉ mô tả các hình chuẩn; Freeform/Scribble/Curve do
       người dùng vẽ được Office lưu trong a:custGeom/a:pathLst. Trước đây
       Word bỏ qua toàn bộ nhánh này còn Excel tạo một SVG không có path, nên
       cùng một đối tượng biến mất ở cả hai định dạng. Bộ giải mã dưới đây
       dùng chung mô hình path của luồng PowerPoint và giữ nguyên nhiều path,
       đoạn thẳng, Bezier, cung, fill/stroke cùng hệ tọa độ nguồn. */
    function wpOfficeCustomGeometryFormulaValue(rawValue, values, fallback = 0) {
      const raw = String(rawValue == null ? '' : rawValue).trim();
      if (!raw) return wpOfficeNumber(fallback);
      const numeric = Number(raw);
      if (Number.isFinite(numeric)) return numeric;
      const key = raw.toLowerCase();
      return Object.prototype.hasOwnProperty.call(values || {}, key)
        ? wpOfficeNumber(values[key], fallback) : wpOfficeNumber(fallback);
    }

    function wpOfficeCustomGeometryGuideValue(formula, values) {
      const tokens = String(formula || '').trim().split(/\s+/).filter(Boolean);
      if (!tokens.length) return 0;
      const op = tokens.shift().toLowerCase();
      const number = (index, fallback = 0) => wpOfficeCustomGeometryFormulaValue(
        tokens[index], values, fallback
      );
      const angle = (index) => number(index) / 60000 * Math.PI / 180;
      switch (op) {
        case 'val': return number(0);
        case '+-': return number(0) + number(1) - number(2);
        case '*/': return number(2) ? number(0) * number(1) / number(2) : 0;
        case '+/': return number(2) ? (number(0) + number(1)) / number(2) : 0;
        case '?:': return number(0) > 0 ? number(1) : number(2);
        case 'abs': return Math.abs(number(0));
        case 'at2': return Math.atan2(number(1), number(0)) * 180 / Math.PI * 60000;
        case 'cat2': return number(0) * Math.cos(Math.atan2(number(2), number(1)));
        case 'cos': return number(0) * Math.cos(angle(1));
        case 'max': return Math.max(number(0), number(1));
        case 'min': return Math.min(number(0), number(1));
        case 'mod': return Math.hypot(number(0), number(1), number(2));
        case 'pin': return Math.max(number(0), Math.min(number(2), number(1)));
        case 'sat2': return number(0) * Math.sin(Math.atan2(number(2), number(1)));
        case 'sin': return number(0) * Math.sin(angle(1));
        case 'sqrt': return Math.sqrt(Math.max(0, number(0)));
        case 'tan': return number(0) * Math.tan(angle(1));
        default: return wpOfficeCustomGeometryFormulaValue(op, values, 0);
      }
    }

    function wpOfficeCustomGeometryBaseValues(width, height, adjustments = null) {
      const w = Math.max(1, wpOfficeNumber(width, 1));
      const h = Math.max(1, wpOfficeNumber(height, 1));
      const ss = Math.min(w, h);
      const ls = Math.max(w, h);
      const values = {
        l:0, t:0, r:w, b:h, w, h, hc:w / 2, vc:h / 2, ss, ls,
        wd2:w / 2, wd3:w / 3, wd4:w / 4, wd5:w / 5, wd6:w / 6,
        wd8:w / 8, wd10:w / 10, wd12:w / 12, wd32:w / 32,
        hd2:h / 2, hd3:h / 3, hd4:h / 4, hd5:h / 5, hd6:h / 6,
        hd8:h / 8, hd10:h / 10, hd12:h / 12, hd32:h / 32,
        ssd2:ss / 2, ssd4:ss / 4, ssd6:ss / 6, ssd8:ss / 8,
        ssd16:ss / 16, ssd32:ss / 32,
        cd2:10800000, cd4:5400000, cd8:2700000,
        '3cd4':16200000, '3cd8':8100000, '5cd8':13500000, '7cd8':18900000,
      };
      Object.entries(adjustments || {}).forEach(([name, value]) => {
        values[String(name).toLowerCase()] = wpOfficeNumber(value);
      });
      return values;
    }

    function wpOfficeCustomGeometryInferExtent(pathNode) {
      let maximumX = 0;
      let maximumY = 0;
      wpOfficeXmlElements(pathNode, 'pt').forEach((point) => {
        const x = Number(wpOfficeXmlAttr(point, 'x', ''));
        const y = Number(wpOfficeXmlAttr(point, 'y', ''));
        if (Number.isFinite(x)) maximumX = Math.max(maximumX, x);
        if (Number.isFinite(y)) maximumY = Math.max(maximumY, y);
      });
      wpOfficeXmlElements(pathNode, 'arcto').forEach((arc) => {
        const wR = Number(wpOfficeXmlAttr(arc, 'wR', ''));
        const hR = Number(wpOfficeXmlAttr(arc, 'hR', ''));
        if (Number.isFinite(wR)) maximumX = Math.max(maximumX, wR);
        if (Number.isFinite(hR)) maximumY = Math.max(maximumY, hR);
      });
      return { width:Math.max(1, maximumX), height:Math.max(1, maximumY) };
    }

    function wpOfficeCustomGeometryPathParts(customGeometryXml, width, height,
      sourceExtent = null, adjustments = null) {
      if (!customGeometryXml) return [];
      let customGeometry = customGeometryXml instanceof Element ? customGeometryXml : null;
      if (!customGeometry) {
        try {
          const parsed = new DOMParser().parseFromString(
            String(customGeometryXml), 'application/xml'
          );
          if (!parsed.getElementsByTagName('parsererror').length) {
            customGeometry = parsed.documentElement;
          }
        } catch (_) {}
      }
      if (!(customGeometry instanceof Element)) return [];
      const pathList = wpOfficeXmlElements(customGeometry, 'pathlst')[0];
      const pathNodes = pathList ? wpOfficeXmlChildren(pathList, 'path') : [];
      const targetWidth = Math.max(1, wpOfficeNumber(width, 1));
      const targetHeight = Math.max(1, wpOfficeNumber(height, 1));
      return pathNodes.map((pathNode) => {
        const inferred = wpOfficeCustomGeometryInferExtent(pathNode);
        const pathWidth = Math.max(1, wpOfficeNumber(
          wpOfficeXmlAttr(pathNode, 'w', ''),
          sourceExtent && sourceExtent.width || inferred.width
        ));
        const pathHeight = Math.max(1, wpOfficeNumber(
          wpOfficeXmlAttr(pathNode, 'h', ''),
          sourceExtent && sourceExtent.height || inferred.height
        ));
        const scaleX = targetWidth / pathWidth;
        const scaleY = targetHeight / pathHeight;
        const values = wpOfficeCustomGeometryBaseValues(pathWidth, pathHeight, adjustments);
        const guideNodes = [
          ...wpOfficeXmlElements(customGeometry, 'avlst'),
          ...wpOfficeXmlElements(customGeometry, 'gdlst'),
        ].flatMap((listNode) => wpOfficeXmlChildren(listNode, 'gd'));
        /* Các guide DrawingML được khai báo theo thứ tự phụ thuộc. Hai lượt
           giải đủ cho cả guide tham chiếu thuận trong tệp Office thực tế và
           vẫn giữ chi phí nhỏ với hình tự do có hàng trăm điểm. */
        for (let pass = 0; pass < 2; pass += 1) {
          guideNodes.forEach((guide) => {
            const name = String(wpOfficeXmlAttr(guide, 'name', '')).toLowerCase();
            if (!name) return;
            values[name] = wpOfficeCustomGeometryGuideValue(
              wpOfficeXmlAttr(guide, 'fmla', ''), values
            );
          });
        }
        const coordinate = (raw, axis) => wpOfficeCustomGeometryFormulaValue(
          raw, values, 0
        ) * (axis === 'x' ? scaleX : scaleY);
        let currentX = 0;
        let currentY = 0;
        const segments = [];
        wpOfficeXmlChildren(pathNode).forEach((command) => {
          const name = wpOfficeLocalName(command);
          if (name === 'moveto' || name === 'lnto') {
            const point = wpOfficeXmlChildren(command, 'pt')[0];
            if (!point) return;
            const x = coordinate(wpOfficeXmlAttr(point, 'x', ''), 'x');
            const y = coordinate(wpOfficeXmlAttr(point, 'y', ''), 'y');
            segments.push(`${name === 'moveto' ? 'M' : 'L'}${x},${y}`);
            currentX = x;
            currentY = y;
            return;
          }
          if (name === 'cubicbezto' || name === 'quadbezto') {
            const points = wpOfficeXmlChildren(command, 'pt').map((point) => ({
              x:coordinate(wpOfficeXmlAttr(point, 'x', ''), 'x'),
              y:coordinate(wpOfficeXmlAttr(point, 'y', ''), 'y'),
            }));
            if (name === 'cubicbezto' && points.length >= 3) {
              segments.push(`C${points[0].x},${points[0].y} ${points[1].x},${points[1].y} ${points[2].x},${points[2].y}`);
              currentX = points[2].x;
              currentY = points[2].y;
            } else if (name === 'quadbezto' && points.length >= 2) {
              segments.push(`Q${points[0].x},${points[0].y} ${points[1].x},${points[1].y}`);
              currentX = points[1].x;
              currentY = points[1].y;
            }
            return;
          }
          if (name === 'arcto') {
            const rawWR = wpOfficeCustomGeometryFormulaValue(
              wpOfficeXmlAttr(command, 'wR', ''), values, 0
            );
            const rawHR = wpOfficeCustomGeometryFormulaValue(
              wpOfficeXmlAttr(command, 'hR', ''), values, 0
            );
            const radiusX = rawWR * scaleX;
            const radiusY = rawHR * scaleY;
            const startAngle = wpOfficeCustomGeometryFormulaValue(
              wpOfficeXmlAttr(command, 'stAng', ''), values, 0
            ) / 60000;
            const sweepAngle = wpOfficeCustomGeometryFormulaValue(
              wpOfficeXmlAttr(command, 'swAng', ''), values, 0
            ) / 60000;
            if (!(rawWR > 0) || !(rawHR > 0) || !sweepAngle) return;
            const startVisual = startAngle * Math.PI / 180;
            const startParametric = Math.atan2(
              rawWR * Math.sin(startVisual), rawHR * Math.cos(startVisual)
            );
            const endVisual = (startAngle + sweepAngle) * Math.PI / 180;
            const endParametric = Math.atan2(
              rawWR * Math.sin(endVisual), rawHR * Math.cos(endVisual)
            );
            const centerX = currentX / scaleX - rawWR * Math.cos(startParametric);
            const centerY = currentY / scaleY - rawHR * Math.sin(startParametric);
            const endX = (centerX + rawWR * Math.cos(endParametric)) * scaleX;
            const endY = (centerY + rawHR * Math.sin(endParametric)) * scaleY;
            segments.push(`A${radiusX},${radiusY} 0 ${Math.abs(sweepAngle) > 180 ? 1 : 0},${sweepAngle > 0 ? 1 : 0} ${endX},${endY}`);
            currentX = endX;
            currentY = endY;
            return;
          }
          if (name === 'close') segments.push('Z');
        });
        const fillMode = String(wpOfficeXmlAttr(pathNode, 'fill', 'norm')).toLowerCase();
        const strokeMode = String(wpOfficeXmlAttr(pathNode, 'stroke', '1')).toLowerCase();
        return {
          d:segments.join(' '),
          fill:fillMode,
          stroke:!(/^(?:0|false|f|off|none)$/i.test(strokeMode)),
        };
      }).filter((part) => part.d);
    }

    function wpOfficeShapePlanFromNode(shapeNode, themeColors = null) {
      if (!(shapeNode instanceof Element)) return null;
      const shapeProperties = wpOfficeXmlChildren(shapeNode, 'sppr')[0]
        || wpOfficeXmlElements(shapeNode, 'sppr')[0] || null;
      const shapeStyle = wpOfficeXmlChildren(shapeNode, 'style')[0]
        || wpOfficeXmlElements(shapeNode, 'style')[0] || null;
      const transform = shapeProperties
        ? (wpOfficeXmlChildren(shapeProperties, 'xfrm')[0]
          || wpOfficeXmlElements(shapeProperties, 'xfrm')[0]) : null;
      const presetNode = shapeProperties
        ? (wpOfficeXmlElements(shapeProperties, 'prstgeom')[0]
          || wpOfficeXmlElements(shapeProperties, 'custgeom')[0]) : null;
      const hasCustomGeometry = wpOfficeLocalName(presetNode) === 'custgeom';
      const presetName = hasCustomGeometry
        ? 'customGeometry'
        : String(wpOfficeXmlAttr(presetNode, 'prst', 'rect') || 'rect');
      const preset = presetName.toLowerCase();
      const adjustmentList = presetNode && wpOfficeXmlElements(presetNode, 'avlst')[0];
      const adjustments = {};
      if (adjustmentList) {
        wpOfficeXmlChildren(adjustmentList, 'gd').forEach((guideNode) => {
          const name = String(wpOfficeXmlAttr(guideNode, 'name', '') || '').trim();
          const formula = String(wpOfficeXmlAttr(guideNode, 'fmla', '') || '').trim();
          const valueMatch = formula.match(/(?:^|\s)val\s+(-?\d+(?:\.\d+)?)(?:\s|$)/i)
            || formula.match(/(-?\d+(?:\.\d+)?)/);
          if (name && valueMatch) adjustments[name] = wpOfficeNumber(valueMatch[1]);
        });
      }
      const explicitLine = shapeProperties ? wpOfficeXmlChildren(shapeProperties, 'ln')[0] : null;
      const lineNode = explicitLine || (shapeStyle && wpOfficeXmlChildren(shapeStyle, 'lnref')[0]);
      const hasExplicitFill = !!(shapeProperties && (
        wpOfficeXmlChildren(shapeProperties, 'solidfill').length
        || wpOfficeXmlChildren(shapeProperties, 'nofill').length
      ));
      const fillSource = hasExplicitFill ? shapeProperties
        : (shapeStyle && wpOfficeXmlChildren(shapeStyle, 'fillref')[0]);
      const fill = wpOfficeShapeColor(
        fillSource, preset === 'line' ? 'none' : '#ffffff', themeColors
      );
      const styleLine = shapeStyle && wpOfficeXmlChildren(shapeStyle, 'lnref')[0];
      const stroke = wpOfficeShapeColor(lineNode,
        wpOfficeShapeColor(styleLine, '#000000', themeColors), themeColors);
      const strokeWidth = Math.max(.6, Math.min(16,
        explicitLine
          ? wpOfficeEmuToPx(wpOfficeXmlAttr(explicitLine, 'w', '9525'))
          : 2
      ));
      const presetDashNode = explicitLine
        ? wpOfficeXmlChildren(explicitLine, 'prstdash')[0] : null;
      const dashStyle = String(
        wpOfficeXmlAttr(presetDashNode, 'val', 'solid') || 'solid'
      ).trim().toLowerCase();
      const textBody = wpOfficeXmlChildren(shapeNode, 'txbody')[0]
        || wpOfficeXmlChildren(shapeNode, 'txbx')[0]
        || wpOfficeXmlElements(shapeNode, 'txbody')[0]
        || wpOfficeXmlElements(shapeNode, 'txbx')[0] || null;
      const paragraphs = textBody ? wpOfficeXmlElements(textBody, 'p') : [];
      const textLines = (paragraphs.length ? paragraphs : [textBody]).map((paragraph) =>
        wpOfficeXmlElements(paragraph, 't').map((node) => String(node.textContent || '')).join('')
      ).filter((line) => line !== '');
      const runProperties = textBody
        ? (wpOfficeXmlElements(textBody, 'rpr')[0]
          || wpOfficeXmlElements(textBody, 'defrpr')[0]) : null;
      const sizeRaw = wpOfficeNumber(wpOfficeXmlAttr(runProperties, 'sz', ''));
      const isWordRunProperties = /wordprocessingml/i.test(String(runProperties && runProperties.namespaceURI || ''));
      const fontSizePt = sizeRaw > 0 ? sizeRaw / (isWordRunProperties ? 2 : 100) : 12;
      const wordColorNode = runProperties && wpOfficeXmlElements(runProperties, 'color')[0];
      const wordColorRaw = String(wpOfficeXmlAttr(wordColorNode, 'val', '')).replace(/^#/, '');
      const textColor = /^[0-9a-f]{6}$/i.test(wordColorRaw)
        ? `#${wordColorRaw}` : wpOfficeShapeColor(runProperties, '#111111', themeColors);
      const xfrmRotation = wpOfficeNumber(wpOfficeXmlAttr(transform, 'rot', '')) / 60000;
      const transformExtent = transform && wpOfficeXmlChildren(transform, 'ext')[0];
      const geometryWidth = Math.abs(wpOfficeNumber(wpOfficeXmlAttr(transformExtent, 'cx', '')));
      const geometryHeight = Math.abs(wpOfficeNumber(wpOfficeXmlAttr(transformExtent, 'cy', '')));
      const lineAxis = /^(?:line|straightconnector1)$/.test(preset)
        ? (geometryHeight <= Math.max(9525, geometryWidth * .02) ? 'horizontal'
          : (geometryWidth <= Math.max(9525, geometryHeight * .02) ? 'vertical' : 'diagonal'))
        : '';
      return {
        preset,
        presetName,
        hasCustomGeometry,
        customGeometryXml:hasCustomGeometry
          ? new XMLSerializer().serializeToString(presetNode) : '',
        adjustments,
        geometryWidth,
        geometryHeight,
        geometryWidthPx:geometryWidth > 0 ? Math.max(1, wpOfficeEmuToPx(geometryWidth)) : 0,
        geometryHeightPx:geometryHeight > 0 ? Math.max(1, wpOfficeEmuToPx(geometryHeight)) : 0,
        lineAxis,
        fill,
        stroke:stroke === 'none' ? 'transparent' : stroke,
        strokeWidth,
        dashStyle,
        textLines,
        fontSizePt,
        textColor:textColor === 'none' ? '#111111' : textColor,
        rotation:xfrmRotation,
        flipH:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(transform, 'flipH', ''))),
        flipV:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(transform, 'flipV', ''))),
        startArrow:!!(lineNode && wpOfficeXmlChildren(lineNode, 'headend').some((node) =>
          !/^(?:|none)$/i.test(String(wpOfficeXmlAttr(node, 'type', '')))
        )),
        endArrow:!!(lineNode && wpOfficeXmlChildren(lineNode, 'tailend').some((node) =>
          !/^(?:|none)$/i.test(String(wpOfficeXmlAttr(node, 'type', '')))
        )),
      };
    }

    function wpOfficeShapeSvgElementLegacy(plan, label = 'Hình vẽ Office') {
      const item = plan || {};
      const ns = 'http://www.w3.org/2000/svg';
      const svg = document.createElementNS(ns, 'svg');
      svg.classList.add('mvip-office-vector-shape');
      svg.dataset.officeObjectKind = 'shape';
      svg.setAttribute('viewBox', '0 0 1000 1000');
      svg.setAttribute('preserveAspectRatio', 'none');
      svg.setAttribute('role', 'group');
      svg.setAttribute('aria-label', label);
      const defs = document.createElementNS(ns, 'defs');
      const markerId = `mvip-office-arrow-${Math.random().toString(36).slice(2)}`;
      const marker = document.createElementNS(ns, 'marker');
      marker.setAttribute('id', markerId);
      marker.setAttribute('viewBox', '0 0 10 10');
      marker.setAttribute('refX', '8.5');
      marker.setAttribute('refY', '5');
      marker.setAttribute('markerWidth', '7');
      marker.setAttribute('markerHeight', '7');
      marker.setAttribute('orient', 'auto-start-reverse');
      const arrow = document.createElementNS(ns, 'path');
      arrow.setAttribute('d', 'M0 0 L10 5 L0 10 Z');
      arrow.setAttribute('fill', String(item.stroke || '#000000'));
      marker.appendChild(arrow);
      defs.appendChild(marker);
      svg.appendChild(defs);
      const preset = String(item.preset || 'rect').toLowerCase();
      let shape;
      if (preset === 'line' || preset === 'straightconnector1') {
        shape = document.createElementNS(ns, 'line');
        const lineAxis = String(item.lineAxis || 'diagonal').toLowerCase();
        if (lineAxis === 'horizontal') {
          shape.setAttribute('x1', item.flipH ? '980' : '20');
          shape.setAttribute('y1', '500');
          shape.setAttribute('x2', item.flipH ? '20' : '980');
          shape.setAttribute('y2', '500');
        } else if (lineAxis === 'vertical') {
          shape.setAttribute('x1', '500');
          shape.setAttribute('y1', item.flipV ? '980' : '20');
          shape.setAttribute('x2', '500');
          shape.setAttribute('y2', item.flipV ? '20' : '980');
        } else {
          shape.setAttribute('x1', item.flipH ? '980' : '20');
          shape.setAttribute('y1', item.flipV ? '980' : '20');
          shape.setAttribute('x2', item.flipH ? '20' : '980');
          shape.setAttribute('y2', item.flipV ? '20' : '980');
        }
        shape.setAttribute('fill', 'none');
      } else if (/nosmoking|notallowed|prohibition/.test(preset)) {
        const outer = document.createElementNS(ns, 'circle');
        outer.setAttribute('cx', '500');
        outer.setAttribute('cy', '500');
        outer.setAttribute('r', '475');
        outer.setAttribute('fill', String(item.fill || '#5b9bd5'));
        outer.setAttribute('stroke', String(item.stroke || '#20364f'));
        outer.setAttribute('stroke-width', String(Math.max(8,
          wpOfficeNumber(item.strokeWidth, 2) * 7.5
        )));
        svg.appendChild(outer);
        const opening = document.createElementNS(ns, 'circle');
        opening.setAttribute('cx', '500');
        opening.setAttribute('cy', '500');
        opening.setAttribute('r', '315');
        opening.setAttribute('fill', '#ffffff');
        opening.setAttribute('stroke', String(item.stroke || '#20364f'));
        opening.setAttribute('stroke-width', '22');
        svg.appendChild(opening);
        const slashBorder = document.createElementNS(ns, 'line');
        slashBorder.setAttribute('x1', '245');
        slashBorder.setAttribute('y1', '245');
        slashBorder.setAttribute('x2', '755');
        slashBorder.setAttribute('y2', '755');
        slashBorder.setAttribute('stroke', String(item.stroke || '#20364f'));
        slashBorder.setAttribute('stroke-width', '154');
        slashBorder.setAttribute('stroke-linecap', 'butt');
        svg.appendChild(slashBorder);
        const slash = document.createElementNS(ns, 'line');
        slash.setAttribute('x1', '245');
        slash.setAttribute('y1', '245');
        slash.setAttribute('x2', '755');
        slash.setAttribute('y2', '755');
        slash.setAttribute('stroke', String(item.fill || '#5b9bd5'));
        slash.setAttribute('stroke-width', '118');
        slash.setAttribute('stroke-linecap', 'butt');
        svg.appendChild(slash);
        shape = null;
      } else if (/ellipse|oval/.test(preset)) {
        shape = document.createElementNS(ns, 'ellipse');
        shape.setAttribute('cx', '500');
        shape.setAttribute('cy', '500');
        shape.setAttribute('rx', '480');
        shape.setAttribute('ry', '480');
      } else if (/diamond/.test(preset)) {
        shape = document.createElementNS(ns, 'polygon');
        shape.setAttribute('points', '500,15 985,500 500,985 15,500');
      } else if (/righttriangle/.test(preset)) {
        shape = document.createElementNS(ns, 'polygon');
        shape.setAttribute('points', '15,15 15,985 985,985');
      } else if (/triangle/.test(preset)) {
        shape = document.createElementNS(ns, 'polygon');
        shape.setAttribute('points', '500,15 985,985 15,985');
      } else if (preset === 'star6') {
        /* star6 của Office không phải ngôi sao dựng theo đường tròn đều:
           sáu đỉnh ngoài nằm trên biên hộp và sáu đỉnh lõm ở 1/3 cạnh.
           Dùng đúng tỉ lệ preset để Word/Excel trùng hình PowerPoint. */
        shape = document.createElementNS(ns, 'polygon');
        shape.setAttribute('points', [
          '15,250', '338,250', '500,15', '662,250',
          '985,250', '823,500', '985,750', '662,750',
          '500,985', '338,750', '15,750', '177,500',
        ].join(' '));
      } else if (preset === 'star16') {
        /* star16 mặc định của Office dùng 16 mũi, bán kính lõm bằng
           khoảng 3/4 bán kính ngoài (adj=2700 trên hệ 21600). */
        shape = document.createElementNS(ns, 'polygon');
        const points = [];
        for (let index = 0; index < 32; index += 1) {
          const angle = -Math.PI / 2 + index * Math.PI / 16;
          const radius = index % 2 ? 360 : 480;
          points.push(`${(500 + Math.cos(angle) * radius).toFixed(2)},${(500 + Math.sin(angle) * radius).toFixed(2)}`);
        }
        shape.setAttribute('points', points.join(' '));
      } else if (preset === 'cloud' || preset === 'cloudcallout') {
        /* Cloud Callout là một đường bao mây và hai bóng thoại ở dưới-trái.
           Giữ chúng trong cùng path để fill/stroke/theme của Office áp dụng
           đồng nhất cho toàn bộ hình ở cả Word và Excel. */
        shape = document.createElementNS(ns, 'path');
        const cloudBody = [
          'M 155 585',
          'C 70 565 55 455 120 400',
          'C 80 315 150 225 245 235',
          'C 260 140 350 100 425 155',
          'C 470 60 590 55 640 140',
          'C 720 70 825 125 820 225',
          'C 930 215 995 310 945 400',
          'C 1010 465 970 575 875 590',
          'C 870 680 765 720 700 650',
          'C 630 730 515 720 475 645',
          'C 390 730 285 690 280 610',
          'C 225 650 180 630 155 585 Z',
        ].join(' ');
        const calloutTail = preset === 'cloudcallout'
          ? ' M 390 770 m -46 0 a 46 46 0 1 0 92 0 a 46 46 0 1 0 -92 0 M 345 915 m -24 0 a 24 24 0 1 0 48 0 a 24 24 0 1 0 -48 0'
          : '';
        shape.setAttribute('d', cloudBody + calloutTail);
      } else if (/arc|bentconnector/.test(preset)) {
        shape = document.createElementNS(ns, 'path');
        shape.setAttribute('d', 'M25 975 Q25 25 975 25');
        shape.setAttribute('fill', 'none');
      } else if (/arrow/.test(preset)) {
        shape = document.createElementNS(ns, 'polygon');
        shape.setAttribute('points', '15,340 650,340 650,120 985,500 650,880 650,660 15,660');
      } else {
        shape = document.createElementNS(ns, 'rect');
        shape.setAttribute('x', '15');
        shape.setAttribute('y', '15');
        shape.setAttribute('width', '970');
        shape.setAttribute('height', '970');
        shape.setAttribute('rx', /round/.test(preset) ? '90' : '0');
      }
      if (shape) {
        shape.setAttribute('fill', String(item.fill || 'none'));
        shape.setAttribute('stroke', String(item.stroke || '#000000'));
        shape.setAttribute('stroke-width', String(Math.max(.6, wpOfficeNumber(item.strokeWidth, 1))));
        const dashStyle = String(item.dashStyle || 'solid').toLowerCase();
        if (!/^(?:|solid)$/.test(dashStyle)) {
          const unit = Math.max(1, wpOfficeNumber(item.strokeWidth, 1));
          const dashPatterns = {
            dot:[unit, unit * 2],
            sysdot:[unit, unit * 2],
            dash:[unit * 4, unit * 2.5],
            sysdash:[unit * 4, unit * 2.5],
            dashdot:[unit * 4, unit * 2, unit, unit * 2],
            sysdashdot:[unit * 4, unit * 2, unit, unit * 2],
            lgdash:[unit * 7, unit * 3],
            lgdashdot:[unit * 7, unit * 2.5, unit, unit * 2.5],
            lgdashdotdot:[unit * 7, unit * 2.5, unit, unit * 2.5, unit, unit * 2.5],
          };
          const pattern = dashPatterns[dashStyle] || dashPatterns.dash;
          shape.setAttribute('stroke-dasharray', pattern.map((value) =>
            Math.round(value * 1000) / 1000
          ).join(' '));
        }
        shape.setAttribute('vector-effect', 'non-scaling-stroke');
        if (item.startArrow) shape.setAttribute('marker-start', `url(#${markerId})`);
        if (item.endArrow) shape.setAttribute('marker-end', `url(#${markerId})`);
        svg.appendChild(shape);
      }
      const textLines = Array.isArray(item.textLines) ? item.textLines : [];
      if (textLines.length) {
        const text = document.createElementNS(ns, 'text');
        text.setAttribute('x', '500');
        text.setAttribute('y', String(500 - (textLines.length - 1) * 72));
        text.setAttribute('text-anchor', 'middle');
        text.setAttribute('dominant-baseline', 'middle');
        text.setAttribute('font-family', 'Times New Roman, Times, serif');
        text.setAttribute('font-size', String(Math.max(70, Math.min(310,
          wpOfficeNumber(item.fontSizePt, 12) * 10
        ))));
        text.setAttribute('fill', String(item.textColor || '#111111'));
        textLines.forEach((line, index) => {
          const tspan = document.createElementNS(ns, 'tspan');
          tspan.setAttribute('x', '500');
          if (index > 0) tspan.setAttribute('dy', '145');
          tspan.textContent = String(line || '');
          text.appendChild(tspan);
        });
        svg.appendChild(text);
      }
      return svg;
    }

    function wpOfficeShapeSvgElement(plan, label = 'Hình vẽ Office', renderOptions = {}) {
      const item = plan || {};
      const ns = 'http://www.w3.org/2000/svg';
      const svg = document.createElementNS(ns, 'svg');
      svg.classList.add('mvip-office-vector-shape');
      svg.dataset.officeObjectKind = 'shape';
      const presetName = String(item.presetName || item.preset || 'rect');
      const preset = presetName.toLowerCase();
      const geometryApi = window.mvipOfficePresetGeometry || null;
      const geometrySupported = preset === 'textnoshape' || !!(geometryApi
        && typeof geometryApi.hasPreset === 'function'
        && geometryApi.hasPreset(presetName));
      const extentWidth = Math.max(0, wpOfficeNumber(item.geometryWidthPx));
      const extentHeight = Math.max(0, wpOfficeNumber(item.geometryHeightPx));
      const hasExtent = extentWidth > 0 || extentHeight > 0;
      const canvasWidth = extentWidth > 0 ? extentWidth : (hasExtent ? 1 : 1000);
      const canvasHeight = extentHeight > 0 ? extentHeight : (hasExtent ? 1 : 1000);
      const strokeColor = String(item.stroke || '#000000');
      const strokeWidth = Math.max(.6, wpOfficeNumber(item.strokeWidth, 1));
      const fillColor = String(item.fill || 'none');
      const lineOnlyPreset = /^(?:line|lineinv|straightconnector1|bentconnector[2-5]|curvedconnector[2-5]|arc)$/.test(preset);
      const dashStyle = String(item.dashStyle || 'solid').toLowerCase();
      const dashPattern = (() => {
        if (/^(?:|solid)$/.test(dashStyle)) return '';
        const unit = Math.max(1, strokeWidth);
        const patterns = {
          dot:[unit, unit * 2],
          sysdot:[unit, unit * 2],
          dash:[unit * 4, unit * 2.5],
          sysdash:[unit * 4, unit * 2.5],
          dashdot:[unit * 4, unit * 2, unit, unit * 2],
          sysdashdot:[unit * 4, unit * 2, unit, unit * 2],
          lgdash:[unit * 7, unit * 3],
          lgdashdot:[unit * 7, unit * 2.5, unit, unit * 2.5],
          lgdashdotdot:[unit * 7, unit * 2.5, unit, unit * 2.5, unit, unit * 2.5],
        };
        return (patterns[dashStyle] || patterns.dash).map((value) =>
          Math.round(value * 1000) / 1000
        ).join(' ');
      })();
      const adjustmentMap = new Map(Object.entries(item.adjustments || {}).map(([name, value]) => [
        String(name), wpOfficeNumber(value),
      ]));

      svg.setAttribute('viewBox', `0 0 ${canvasWidth} ${canvasHeight}`);
      svg.setAttribute('preserveAspectRatio', 'none');
      svg.setAttribute('role', 'group');
      svg.setAttribute('aria-label', label);
      svg.setAttribute('shape-rendering', 'geometricPrecision');
      svg.style.overflow = 'visible';

      const defs = document.createElementNS(ns, 'defs');
      const markerId = `mvip-office-arrow-${Math.random().toString(36).slice(2)}`;
      const marker = document.createElementNS(ns, 'marker');
      marker.setAttribute('id', markerId);
      marker.setAttribute('viewBox', '0 0 10 10');
      // The reference point must coincide with the triangle's tip. Otherwise
      // zoom magnifies the overrun past the endpoint saved by Word.
      marker.setAttribute('refX', renderOptions.exactArrowEndpoint ? '10' : '8.5');
      marker.setAttribute('refY', '5');
      marker.setAttribute('markerWidth', '7');
      marker.setAttribute('markerHeight', '7');
      marker.setAttribute('orient', 'auto-start-reverse');
      if (renderOptions.exactArrowEndpoint) {
        marker.setAttribute('markerUnits', 'userSpaceOnUse');
        marker.setAttribute('markerWidth', String(7 * Math.max(1, strokeWidth)));
        marker.setAttribute('markerHeight', String(7 * Math.max(1, strokeWidth)));
      }
      const arrow = document.createElementNS(ns, 'path');
      arrow.setAttribute('d', 'M0 0 L10 5 L0 10 Z');
      arrow.setAttribute('fill', strokeColor);
      marker.appendChild(arrow);
      defs.appendChild(marker);
      svg.appendChild(defs);

      const shapeGroup = document.createElementNS(ns, 'g');
      if (item.flipH || item.flipV) {
        shapeGroup.setAttribute('transform', [
          `translate(${item.flipH ? canvasWidth : 0} ${item.flipV ? canvasHeight : 0})`,
          `scale(${item.flipH ? -1 : 1} ${item.flipV ? -1 : 1})`,
        ].join(' '));
      }
      svg.appendChild(shapeGroup);

      const colorVariant = (color, modifier) => {
        if (!modifier || modifier === 'norm' || modifier === 'none') return color;
        const source = String(color || '').replace(/^#/, '');
        if (!/^[0-9a-f]{6}$/i.test(source)) return color;
        const channels = [0, 2, 4].map((offset) => parseInt(source.slice(offset, offset + 2), 16));
        const darken = modifier === 'darken' ? .62 : (modifier === 'darkenLess' ? .82 : null);
        const lighten = modifier === 'lighten' ? .38 : (modifier === 'lightenLess' ? .18 : null);
        const output = channels.map((channel) => {
          if (darken != null) return channel * darken;
          if (lighten != null) return channel + (255 - channel) * lighten;
          return channel;
        });
        return `#${output.map((channel) => Math.max(0, Math.min(255, Math.round(channel)))
          .toString(16).padStart(2, '0')).join('')}`;
      };
      const appendPath = (pathData, options = {}) => {
        if (!pathData) return null;
        const path = document.createElementNS(ns, 'path');
        path.classList.add('mvip-office-vector-part');
        path.setAttribute('d', String(pathData));
        path.setAttribute('fill', String(options.fill == null ? fillColor : options.fill));
        path.setAttribute('stroke', String(options.stroke === false ? 'none' : strokeColor));
        path.setAttribute('stroke-width', String(strokeWidth * Math.max(.05,
          wpOfficeNumber(options.strokeWidthScale, 1)
        )));
        path.setAttribute('stroke-linejoin', 'round');
        path.setAttribute('stroke-linecap', lineOnlyPreset && !renderOptions.exactArrowEndpoint ? 'round' : 'butt');
        if (dashPattern) path.setAttribute('stroke-dasharray', dashPattern);
        path.setAttribute('fill-rule', 'evenodd');
        path.setAttribute('vector-effect', 'non-scaling-stroke');
        if (options.arrows !== false) {
          if (item.startArrow) path.setAttribute('marker-start', `url(#${markerId})`);
          if (item.endArrow) path.setAttribute('marker-end', `url(#${markerId})`);
        }
        shapeGroup.appendChild(path);
        return path;
      };

      /* Một số preset DrawingML (đĩa từ, trống từ, lưu trữ nội bộ, nút
         tổng...) ghép vùng khép kín và các đường trang trí hở trong cùng một
         chuỗi SVG. Nếu tô nguyên chuỗi, SVG sẽ tự khép đường hở và tạo ra
         mảng trắng/khuyết giả. Giữ các vùng có Z trong một path even-odd để
         bảo toàn lỗ thật (donut/frame), còn mọi subpath hở chỉ được vẽ viền. */
      const appendPresetPath = (pathData, options = {}) => {
        const source = String(pathData || '').trim();
        if (!source) return 0;
        const subpaths = source.match(/M(?:(?!M)[\s\S])*/g) || [source];
        const closed = [];
        const open = [];
        subpaths.forEach((subpath) => {
          const normalized = String(subpath || '').trim();
          if (!normalized) return;
          if (/[zZ]/.test(normalized)) closed.push(normalized);
          else open.push(normalized);
        });
        let count = 0;
        if (closed.length) {
          appendPath(closed.join(' '), {
            ...options,
            fill:options.fill == null ? fillColor : options.fill,
            arrows:false,
          });
          count += 1;
        }
        open.forEach((subpath, index) => {
          appendPath(subpath, {
            ...options,
            fill:'none',
            arrows:index === open.length - 1,
          });
          count += 1;
        });
        return count;
      };

      let geometryDrawn = false;
      if (item.hasCustomGeometry && item.customGeometryXml) {
        const customPaths = wpOfficeCustomGeometryPathParts(
          item.customGeometryXml, canvasWidth, canvasHeight,
          {
            width:Math.max(1, wpOfficeNumber(item.geometryWidth, canvasWidth)),
            height:Math.max(1, wpOfficeNumber(item.geometryHeight, canvasHeight)),
          },
          item.adjustments || {}
        );
        customPaths.forEach((part, index) => {
          appendPath(part.d, {
            fill:part.fill === 'none' ? 'none' : colorVariant(fillColor, part.fill),
            stroke:part.stroke,
            arrows:index === customPaths.length - 1,
          });
        });
        geometryDrawn = customPaths.length > 0;
      } else if (geometrySupported) {
        const multiPaths = geometryApi.getMultiPathPreset(
          presetName, canvasWidth, canvasHeight, adjustmentMap
        );
        if (Array.isArray(multiPaths) && multiPaths.length) {
          multiPaths.forEach((part, index) => {
            appendPath(part.d, {
              fill:part.fill === 'none' ? 'none' : colorVariant(fillColor, part.fill),
              stroke:part.stroke,
              strokeWidthScale:part.strokeWidthScale,
              arrows:index === multiPaths.length - 1,
            });
          });
          geometryDrawn = true;
        } else {
          const pathData = geometryApi.getPresetShapePath(
            presetName, canvasWidth, canvasHeight, adjustmentMap
          );
          if (pathData) {
            geometryDrawn = appendPresetPath(pathData, {
              fill:lineOnlyPreset ? 'none' : fillColor,
            }) > 0;
          }
          const overlays = geometryApi.getPresetOverlays(
            presetName, canvasWidth, canvasHeight, adjustmentMap
          );
          if (Array.isArray(overlays)) overlays.forEach((overlay) => {
            appendPath(overlay.path, {
              fill:colorVariant(fillColor, overlay.fillModifier),
              stroke:false,
              arrows:false,
            });
          });
        }
      }

      /* Không biến preset lạ thành hình vuông. Chỉ rect/roundRect thật mới
         được dùng fallback chữ nhật; các preset DrawingML chuẩn đi qua bộ
         hình học ở trên, còn custom geometry chưa biết được để trống. */
      if (!geometryDrawn && /^(?:rect|roundrect)$/.test(preset)) {
        const rect = document.createElementNS(ns, 'rect');
        rect.setAttribute('x', '0');
        rect.setAttribute('y', '0');
        rect.setAttribute('width', String(canvasWidth));
        rect.setAttribute('height', String(canvasHeight));
        rect.setAttribute('rx', preset === 'roundrect'
          ? String(Math.min(canvasWidth, canvasHeight) * .12) : '0');
        rect.setAttribute('fill', fillColor);
        rect.setAttribute('stroke', strokeColor);
        rect.setAttribute('stroke-width', String(strokeWidth));
        rect.setAttribute('vector-effect', 'non-scaling-stroke');
        shapeGroup.appendChild(rect);
      }

      const textLines = Array.isArray(item.textLines) ? item.textLines : [];
      if (textLines.length) {
        const text = document.createElementNS(ns, 'text');
        const baseFontSize = hasExtent
          ? wpOfficeNumber(item.fontSizePt, 12) * 96 / 72
          : wpOfficeNumber(item.fontSizePt, 12) * 10;
        const fontSize = Math.max(hasExtent ? 4 : 70, Math.min(
          hasExtent ? Math.max(4, canvasHeight * .8) : 310,
          baseFontSize
        ));
        const lineHeight = fontSize * 1.2;
        text.setAttribute('x', String(canvasWidth / 2));
        text.setAttribute('y', String(canvasHeight / 2 - (textLines.length - 1) * lineHeight / 2));
        text.setAttribute('text-anchor', 'middle');
        text.setAttribute('dominant-baseline', 'middle');
        text.setAttribute('font-family', 'Times New Roman, Times, serif');
        text.setAttribute('font-size', String(fontSize));
        text.setAttribute('fill', String(item.textColor || '#111111'));
        textLines.forEach((line, index) => {
          const tspan = document.createElementNS(ns, 'tspan');
          tspan.setAttribute('x', String(canvasWidth / 2));
          if (index > 0) tspan.setAttribute('dy', String(lineHeight));
          tspan.textContent = String(line || '');
          text.appendChild(tspan);
        });
        svg.appendChild(text);
      }
      return svg;
    }

    /* Một API nội bộ duy nhất cho cả Word và Excel. Ngoài việc tránh hai
       nhánh dựng hình lệch nhau, API này cho phép kiểm tra hồi quy trực tiếp
       từ XML Office mà không cần quy đối tượng thành ảnh. */
    window.mvipOfficeDrawingGeometry = Object.freeze({
      shapePlanFromNode:wpOfficeShapePlanFromNode,
      shapeSvgElement:wpOfficeShapeSvgElement,
      customGeometryPathParts:wpOfficeCustomGeometryPathParts,
    });

    function wpOfficeChartPlanFromXml(chartDocument, themeColors = null) {
      if (!chartDocument) return null;
      const chartTypes = ['barchart', 'linechart', 'piechart', 'doughnutchart', 'areachart', 'scatterchart'];
      const chartNode = wpOfficeXmlElements(chartDocument).find((node) =>
        chartTypes.includes(wpOfficeLocalName(node))
      );
      if (!chartNode) return null;
      const pointValues = (container) => {
        const points = wpOfficeXmlElements(container, 'pt').map((point, order) => ({
          index:wpOfficeNumber(wpOfficeXmlAttr(point, 'idx', order)),
          value:String((wpOfficeXmlElements(point, 'v')[0] || {}).textContent || ''),
        })).sort((left, right) => left.index - right.index);
        return points.map((point) => point.value);
      };
      const series = wpOfficeXmlElements(chartNode, 'ser').map((seriesNode, index) => {
        const titleContainer = wpOfficeXmlChildren(seriesNode, 'tx')[0];
        const title = pointValues(titleContainer)[0]
          || String((wpOfficeXmlElements(titleContainer, 'v')[0] || {}).textContent || `Dãy ${index + 1}`);
        const categoryContainer = wpOfficeXmlChildren(seriesNode, 'cat')[0]
          || wpOfficeXmlChildren(seriesNode, 'xval')[0];
        const valueContainer = wpOfficeXmlChildren(seriesNode, 'val')[0]
          || wpOfficeXmlChildren(seriesNode, 'yval')[0];
        const seriesProperties = wpOfficeXmlChildren(seriesNode, 'sppr')[0];
        const fallbackColor = (themeColors && themeColors[`accent${index % 6 + 1}`])
          || ['#4472c4', '#ed7d31', '#a5a5a5', '#ffc000', '#5b9bd5', '#70ad47'][index % 6];
        return {
          title,
          categories:pointValues(categoryContainer),
          values:pointValues(valueContainer).map((value) => wpOfficeNumber(value)),
          color:wpOfficeShapeColor(seriesProperties, fallbackColor, themeColors),
        };
      }).filter((seriesItem) => seriesItem.values.length);
      const titleNode = wpOfficeXmlElements(chartDocument, 'title')[0];
      const explicitTitle = titleNode
        ? wpOfficeXmlElements(titleNode, 't').map((node) => String(node.textContent || '')).join(' ').trim()
        : '';
      const title = titleNode ? (explicitTitle || 'Chart Title') : '';
      return { type:wpOfficeLocalName(chartNode), title, series, themeColors:themeColors || {} };
    }

    function wpOfficeChartExPlanFromXml(chartDocument, themeColors = null) {
      if (!chartDocument || !wpOfficeXmlElements(chartDocument, 'chart').length) return null;
      const titleNode = wpOfficeXmlElements(chartDocument, 'title')[0];
      const titleText = titleNode
        ? wpOfficeXmlElements(titleNode, 't').map((node) => String(node.textContent || '')).join(' ').trim()
        : '';
      const seriesNodes = wpOfficeXmlElements(chartDocument, 'series');
      const dataNodes = new Map(wpOfficeXmlElements(chartDocument, 'data').map((node) => [
        String(wpOfficeXmlAttr(node, 'id', '')), node,
      ]));
      const series = seriesNodes.map((seriesNode, index) => {
        const dataIdNode = wpOfficeXmlChildren(seriesNode, 'dataid')[0];
        const dataNode = dataNodes.get(String(wpOfficeXmlAttr(dataIdNode, 'val', '')));
        const dimensions = dataNode ? wpOfficeXmlChildren(dataNode).filter((node) =>
          /dim$/.test(wpOfficeLocalName(node))
        ) : [];
        const valuesOf = (dimension) => wpOfficeXmlElements(dimension, 'pt').map((point, order) => ({
          index:wpOfficeNumber(wpOfficeXmlAttr(point, 'idx', order)),
          value:String(wpOfficeXmlElements(point, 'v')[0] && wpOfficeXmlElements(point, 'v')[0].textContent || ''),
        })).sort((left, right) => left.index - right.index).map((point) => point.value);
        const valueDimension = dimensions.find((node) =>
          String(wpOfficeXmlAttr(node, 'type', '')).toLowerCase() === 'val'
        ) || dimensions.find((node) => wpOfficeLocalName(node) === 'numdim');
        const categoryDimension = dimensions.find((node) => node !== valueDimension);
        const fallbackColor = (themeColors && themeColors[`accent${index % 6 + 1}`])
          || ['#4472c4', '#ed7d31', '#a5a5a5', '#ffc000', '#5b9bd5', '#70ad47'][index % 6];
        return {
          title:`Dãy ${index + 1}`,
          categories:valuesOf(categoryDimension),
          values:valuesOf(valueDimension).map((value) => wpOfficeNumber(value)),
          color:fallbackColor,
        };
      }).filter((item) => item.values.length);
      const layout = String(wpOfficeXmlAttr(seriesNodes[0], 'layoutId', 'clusteredColumn')).toLowerCase();
      return {
        type:/pie|doughnut/.test(layout) ? 'piechart'
          : (/line|area/.test(layout) ? `${layout}chart` : 'barchart'),
        title:titleNode ? (titleText || 'Chart Title') : '',
        series,
        themeColors:themeColors || {},
        extended:true,
      };
    }

    function wpOfficeChartSvgElement(plan) {
      const item = plan || {};
      const ns = 'http://www.w3.org/2000/svg';
      const svg = document.createElementNS(ns, 'svg');
      svg.setAttribute('viewBox', '0 0 1000 600');
      svg.setAttribute('preserveAspectRatio', 'none');
      svg.setAttribute('role', 'img');
      svg.setAttribute('aria-label', item.title || 'Biểu đồ Excel');
      const add = (name, attrs, parent = svg) => {
        const node = document.createElementNS(ns, name);
        Object.entries(attrs || {}).forEach(([key, value]) => node.setAttribute(key, String(value)));
        parent.appendChild(node);
        return node;
      };
      add('rect', { x:1, y:1, width:998, height:598, fill:'#ffffff', stroke:'#d1d5db', 'stroke-width':2 });
      if (item.title) {
        const title = add('text', { x:500, y:42, 'text-anchor':'middle', 'font-family':'Arial, sans-serif', 'font-size':30, 'font-weight':700, fill:'#111827' });
        title.textContent = String(item.title);
      }
      const series = Array.isArray(item.series) ? item.series : [];
      const defaults = ['#4472c4', '#ed7d31', '#a5a5a5', '#ffc000', '#5b9bd5', '#70ad47'];
      const colors = series.map((entry, index) => String(entry && entry.color || defaults[index % defaults.length]));
      const type = String(item.type || '').toLowerCase();
      if (/pie|doughnut/.test(type)) {
        if (!series.length) return svg;
        const values = series[0].values.map((value) => Math.max(0, wpOfficeNumber(value)));
        const total = values.reduce((sum, value) => sum + value, 0) || 1;
        let angle = -Math.PI / 2;
        values.forEach((value, index) => {
          const next = angle + value / total * Math.PI * 2;
          const x1 = 500 + Math.cos(angle) * 220;
          const y1 = 315 + Math.sin(angle) * 220;
          const x2 = 500 + Math.cos(next) * 220;
          const y2 = 315 + Math.sin(next) * 220;
          const large = next - angle > Math.PI ? 1 : 0;
          add('path', {
            d:`M500 315 L${x1} ${y1} A220 220 0 ${large} 1 ${x2} ${y2} Z`,
            fill:colors[index % colors.length], stroke:'#ffffff', 'stroke-width':2,
          });
          angle = next;
        });
        if (/doughnut/.test(type)) add('circle', { cx:500, cy:315, r:105, fill:'#ffffff' });
        return svg;
      }
      const flatValues = series.flatMap((seriesItem) => seriesItem.values.map(wpOfficeNumber));
      const rawMaximum = Math.max(1, ...flatValues);
      const maximum = Math.max(1, Math.ceil(rawMaximum * 1.1));
      const minimum = Math.min(0, ...flatValues);
      const span = Math.max(1, maximum - minimum);
      const left = 82;
      const top = 72;
      const width = 870;
      const height = 395;
      const zeroY = top + maximum / span * height;
      const tickMaximum = maximum;
      const tickCount = Math.min(8, Math.max(4, tickMaximum));
      for (let tick = 0; tick <= tickCount; tick += 1) {
        const value = tickMaximum * tick / tickCount;
        const y = top + height - value / tickMaximum * height;
        add('line', { x1:left, y1:y, x2:left + width, y2:y, stroke:'#d7dce2', 'stroke-width':2 });
        const label = add('text', {
          x:left - 13, y:y + 6, 'text-anchor':'end',
          'font-family':'Arial, sans-serif', 'font-size':19, fill:'#4b5563',
        });
        label.textContent = Number.isInteger(value) ? String(value) : value.toFixed(1);
      }
      add('line', { x1:left, y1:top, x2:left, y2:top + height, stroke:'#64748b', 'stroke-width':2 });
      add('line', { x1:left, y1:zeroY, x2:left + width, y2:zeroY, stroke:'#64748b', 'stroke-width':2 });
      const count = Math.max(1, ...series.map((seriesItem) => seriesItem.values.length));
      if (!series.length) return svg;
      if (/bar/.test(type)) {
        const groupWidth = width / count;
        const barWidth = Math.max(5, groupWidth * .72 / series.length);
        series.forEach((seriesItem, seriesIndex) => {
          seriesItem.values.forEach((value, index) => {
            const numeric = wpOfficeNumber(value);
            const y = top + (maximum - Math.max(0, numeric)) / span * height;
            const h = Math.max(1, Math.abs(numeric) / span * height);
            add('rect', {
              x:left + index * groupWidth + groupWidth * .14 + seriesIndex * barWidth,
              y:numeric >= 0 ? y : zeroY,
              width:barWidth,
              height:h,
              fill:colors[seriesIndex % colors.length],
            });
          });
        });
      } else {
        series.forEach((seriesItem, seriesIndex) => {
          const points = seriesItem.values.map((value, index) => {
            const x = left + (count <= 1 ? width / 2 : index * width / (count - 1));
            const y = top + (maximum - wpOfficeNumber(value)) / span * height;
            return `${x},${y}`;
          }).join(' ');
          add('polyline', {
            points, fill:/area/.test(type) ? `${colors[seriesIndex % colors.length]}44` : 'none',
            stroke:colors[seriesIndex % colors.length], 'stroke-width':5,
          });
        });
      }
      const categories = series.find((entry) => Array.isArray(entry.categories) && entry.categories.length);
      const labels = categories ? categories.categories : [];
      labels.forEach((labelText, index) => {
        const label = add('text', {
          x:left + (index + .5) * width / Math.max(1, labels.length),
          y:top + height + 30,
          'text-anchor':'middle', 'font-family':'Arial, sans-serif',
          'font-size':19, fill:'#4b5563',
        });
        label.textContent = String(labelText || '');
      });
      const legendWidth = Math.min(170, 55 + Math.max(0, ...series.map((entry) => String(entry.title || '').length)) * 9);
      const legendStart = 500 - series.length * legendWidth / 2;
      series.forEach((entry, index) => {
        add('rect', { x:legendStart + index * legendWidth, y:548, width:17, height:17, fill:colors[index] });
        const label = add('text', {
          x:legendStart + index * legendWidth + 24, y:563,
          'font-family':'Arial, sans-serif', 'font-size':19, fill:'#4b5563',
        });
        label.textContent = String(entry.title || `Dãy ${index + 1}`);
      });
      return svg;
    }

    function wpOfficeObjectLayer(host, behindText = false) {
      if (!(host instanceof HTMLElement)) return null;
      if (getComputedStyle(host).position === 'static') host.style.position = 'relative';
      const className = behindText ? 'is-behind-text' : 'is-in-front-of-text';
      let layer = Array.from(host.children || []).find((child) =>
        child instanceof HTMLElement
          && child.classList.contains('mvip-office-object-layer')
          && child.classList.contains(className)
      );
      if (!(layer instanceof HTMLElement)) {
        layer = document.createElement('div');
        layer.className = `mvip-office-object-layer ${className}`;
        layer.setAttribute('aria-hidden', 'true');
        host.appendChild(layer);
      }
      return layer;
    }

    function wpOfficeObjectHost(bounds, options = {}) {
      const host = document.createElement('div');
      host.className = 'mvip-office-object';
      const objectKind = String(options.objectKind || '').trim();
      const objectPreset = String(options.objectPreset || '').trim();
      if (objectKind) host.dataset.officeObjectKind = objectKind;
      if (objectPreset) host.dataset.officeShapePreset = objectPreset;
      const item = bounds || {};
      host.style.left = `${Math.round(wpOfficeNumber(item.left) * 1000) / 1000}px`;
      host.style.top = `${Math.round(wpOfficeNumber(item.top) * 1000) / 1000}px`;
      host.style.width = `${Math.max(1, Math.round(wpOfficeNumber(item.width, 1) * 1000) / 1000)}px`;
      host.style.height = `${Math.max(1, Math.round(wpOfficeNumber(item.height, 1) * 1000) / 1000)}px`;
      host.style.zIndex = String(Math.max(1, Math.min(2147483000, wpOfficeNumber(options.zIndex, 1))));
      const rotation = wpOfficeNumber(options.rotation);
      if (rotation) host.style.transform = `rotate(${rotation}deg)`;
      return host;
    }

    async function wpOfficeObjectUrl(zip, packagePath, cache) {
      const normalizedPath = String(packagePath || '').replace(/^\/+/, '');
      if (!normalizedPath || !zip || !zip.file(normalizedPath)) return '';
      if (cache.has(normalizedPath)) return cache.get(normalizedPath);
      const bytes = await zip.file(normalizedPath).async('uint8array');
      const objectUrl = URL.createObjectURL(new Blob([bytes], { type:wpPptxMimeType(normalizedPath) }));
      cache.set(normalizedPath, objectUrl);
      wpOrdinaryState.officeObjectUrls.push(objectUrl);
      return objectUrl;
    }

    function wpOfficeWordGroupTextLabelsFromDrawing(drawingNode) {
      /* Đọc lại Text Box trực tiếp từ DrawingML gốc của chính đối tượng đang
         dựng. Đây là lớp bảo toàn cho chế độ Trình chiếu tài liệu: bộ chuyển
         câu hỏi có thể giữ khung/đường của wpg:wgp nhưng bỏ các wps:wsp chỉ
         chứa w:txbxContent. Tách nhãn tại đây giúp mọi nhóm Word giữ đủ chữ,
         không phụ thuộc nhánh VML dự phòng và không suy đoán theo tên file. */
      if (!(drawingNode instanceof Element)) return [];
      const rootGroup = wpOfficeXmlElements(drawingNode, 'wgp')[0] || null;
      if (!rootGroup) return [];
      const directXfrm = (node) => {
        const properties = wpOfficeXmlChildren(node, 'grpsppr')[0]
          || wpOfficeXmlChildren(node, 'sppr')[0] || null;
        const xfrm = properties ? wpOfficeXmlChildren(properties, 'xfrm')[0] : null;
        const off = xfrm ? wpOfficeXmlChildren(xfrm, 'off')[0] : null;
        const ext = xfrm ? wpOfficeXmlChildren(xfrm, 'ext')[0] : null;
        const childOff = xfrm ? wpOfficeXmlChildren(xfrm, 'choff')[0] : null;
        const childExt = xfrm ? wpOfficeXmlChildren(xfrm, 'chext')[0] : null;
        return {
          x:wpOfficeNumber(wpOfficeXmlAttr(off, 'x', 0)),
          y:wpOfficeNumber(wpOfficeXmlAttr(off, 'y', 0)),
          width:Math.abs(wpOfficeNumber(wpOfficeXmlAttr(ext, 'cx', 0))),
          height:Math.abs(wpOfficeNumber(wpOfficeXmlAttr(ext, 'cy', 0))),
          childX:wpOfficeNumber(wpOfficeXmlAttr(childOff, 'x', 0)),
          childY:wpOfficeNumber(wpOfficeXmlAttr(childOff, 'y', 0)),
          childWidth:Math.abs(wpOfficeNumber(wpOfficeXmlAttr(childExt, 'cx', 0))),
          childHeight:Math.abs(wpOfficeNumber(wpOfficeXmlAttr(childExt, 'cy', 0))),
        };
      };
      const rootTransform = directXfrm(rootGroup);
      const rootUnitPerEmuX = rootTransform.width > 0 && rootTransform.childWidth > 0
        ? rootTransform.childWidth / rootTransform.width : 1;
      const rootUnitPerEmuY = rootTransform.height > 0 && rootTransform.childHeight > 0
        ? rootTransform.childHeight / rootTransform.height : 1;
      const rootUnitPerEmu = Math.max(.000001, (rootUnitPerEmuX + rootUnitPerEmuY) / 2);
      const compose = (parent, local) => ({
        sx:parent.sx * local.sx,
        sy:parent.sy * local.sy,
        tx:parent.sx * local.tx + parent.tx,
        ty:parent.sy * local.ty + parent.ty,
      });
      const mapPoint = (mapping, x, y) => ({
        x:mapping.sx * x + mapping.tx,
        y:mapping.sy * y + mapping.ty,
      });
      const labels = [];
      const walk = (groupNode, parentMap, isRoot = false) => {
        let currentMap = parentMap;
        if (!isRoot) {
          const transform = directXfrm(groupNode);
          const sx = transform.width / Math.max(1, transform.childWidth || transform.width || 1);
          const sy = transform.height / Math.max(1, transform.childHeight || transform.height || 1);
          currentMap = compose(parentMap, {
            sx, sy,
            tx:transform.x - transform.childX * sx,
            ty:transform.y - transform.childY * sy,
          });
        }
        wpOfficeXmlChildren(groupNode).forEach((child) => {
          const local = wpOfficeLocalName(child);
          if (local === 'grpsp') {
            walk(child, currentMap, false);
            return;
          }
          if (local !== 'wsp') return;
          const textBody = wpOfficeXmlChildren(child, 'txbx')[0]
            || wpOfficeXmlChildren(child, 'txbody')[0] || null;
          if (!textBody) return;
          const paragraphs = wpOfficeXmlElements(textBody, 'p');
          const text = (paragraphs.length ? paragraphs : [textBody]).map((paragraph) =>
            wpOfficeXmlElements(paragraph, 't')
              .map((node) => String(node.textContent || '')).join('')
          ).filter(Boolean).join('\n').replace(/\u00a0/g, ' ').trim();
          if (!text) return;
          const transform = directXfrm(child);
          if (!(transform.width > 0) || !(transform.height > 0)) return;
          const start = mapPoint(currentMap, transform.x, transform.y);
          const end = mapPoint(currentMap,
            transform.x + transform.width, transform.y + transform.height);
          const width = Math.max(.5, Math.abs(end.x - start.x));
          const height = Math.max(.5, Math.abs(end.y - start.y));
          const sizeNode = wpOfficeXmlElements(textBody, 'sz')[0] || null;
          const pointSize = wpOfficeNumber(wpOfficeXmlAttr(sizeNode, 'val', 0)) / 2;
          const colorNode = wpOfficeXmlElements(textBody, 'color')[0] || null;
          const colorRaw = String(wpOfficeXmlAttr(colorNode, 'val', ''))
            .replace(/^#/, '').trim();
          labels.push({
            type:'wordLabel',
            text,
            x:Math.min(start.x, end.x),
            y:Math.min(start.y, end.y),
            width,
            height,
            fontSize:pointSize > 0
              ? pointSize * 12700 * rootUnitPerEmu
              : height * .52,
            fill:/^[0-9a-f]{6}$/i.test(colorRaw) ? `#${colorRaw}` : '#111111',
          });
        });
      };
      walk(rootGroup, { sx:1, sy:1, tx:0, ty:0 }, true);
      return labels;
    }

    function wpOfficeWordGroupPlanFromDrawing(drawingNode, imageMap) {
      if (!(drawingNode instanceof Element)
          || typeof cv7991QuestionTextFromDocXml !== 'function') return null;
      try {
        const temporaryMap = Object.assign({}, imageMap || {});
        const serialized = new XMLSerializer().serializeToString(drawingNode);
        const wrapped = `<?xml version="1.0" encoding="UTF-8"?><w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"><w:body><w:p><w:r>${serialized}</w:r></w:p></w:body></w:document>`;
        cv7991QuestionTextFromDocXml(wrapped, temporaryMap, {}, {}, {});
        const generated = Object.values(temporaryMap).find((item) =>
          item && item.isWordGroupFigure && item.wordGroupData
        );
        const groupData = generated ? generated.wordGroupData : null;
        if (!groupData) return null;
        const shapes = Array.isArray(groupData.shapes) ? groupData.shapes : [];
        wpOfficeWordGroupTextLabelsFromDrawing(drawingNode).forEach((label) => {
          const centerX = wpOfficeNumber(label.x) + wpOfficeNumber(label.width) / 2;
          const centerY = wpOfficeNumber(label.y) + wpOfficeNumber(label.height) / 2;
          const duplicate = shapes.some((shape) => {
            if (!shape || !['text', 'wordLabel'].includes(String(shape.type || ''))) return false;
            if (String(shape.text || '') !== String(label.text || '')) return false;
            const otherX = wpOfficeNumber(shape.x) + wpOfficeNumber(shape.width) / 2;
            const otherY = wpOfficeNumber(shape.y) + wpOfficeNumber(shape.height) / 2;
            return Math.abs(otherX - centerX) <= Math.max(2, wpOfficeNumber(label.width) * .08)
              && Math.abs(otherY - centerY) <= Math.max(2, wpOfficeNumber(label.height) * .08);
          });
          if (!duplicate) shapes.push(label);
        });
        groupData.shapes = shapes;
        return groupData;
      } catch (_) {
        return null;
      }
    }

    function wpOfficeWordGroupElement(groupData, imageMap, objectId = '') {
      if (!groupData || typeof cv7991PresenterWordGroupHtml !== 'function') return null;
      try {
        const holder = document.createElement('div');
        holder.innerHTML = cv7991PresenterWordGroupHtml({
          relId:`ordinary-office-${objectId || 'shape'}`,
          wordGroupData:groupData,
          isWordGroupFigure:true,
          displayWidthPt:wpOfficeNumber(groupData.displayWidthPt),
          displayHeightPt:wpOfficeNumber(groupData.displayHeightPt),
        }, { imageMap:imageMap || {} });
        return holder.firstElementChild;
      } catch (_) {
        return null;
      }
    }


    /* Bản thử nghiệm 2026-10-07: video WMV/ASF trong PowerPoint được chuyển
       NGAY TRÊN MÁY NGƯỜI DÙNG bằng ffmpeg.wasm. Video không được tải lên
       máy chủ MVIP. Kết quả MP4 được cache trong IndexedDB theo SHA-256 để
       cùng một video chỉ phải chuyển một lần trên trình duyệt này. */
    const WP_LOCAL_VIDEO_CACHE_DB = 'mvip-pptx-video-cache-v1';
    const WP_LOCAL_VIDEO_CACHE_STORE = 'videos';
    // Cache MP4 cục bộ không giới hạn theo thời gian, nhưng tổng dung lượng tối đa 1 GiB.
    // Khi vượt ngưỡng, MVIP xóa video lâu không dùng nhất trước (LRU).
    const WP_LOCAL_VIDEO_CACHE_MAX_BYTES = 1024 * 1024 * 1024;
    const WP_FFMPEG_WRAPPER_URL = 'https://cdn.jsdelivr.net/npm/@ffmpeg/ffmpeg@0.12.10/dist/esm/index.js';
    const WP_FFMPEG_WORKER_URL = 'https://cdn.jsdelivr.net/npm/@ffmpeg/ffmpeg@0.12.10/dist/esm/worker.js';
    const WP_FFMPEG_CORE_BASE = 'https://cdn.jsdelivr.net/npm/@ffmpeg/core@0.12.10/dist/esm';
    let wpLocalFfmpegPromise = null;
    let wpLocalVideoQueue = Promise.resolve();
    let wpLocalVideoJobSerial = 0;

    function wpPptxLegacyBrowserVideo(mediaPath, mimeType = '') {
      return /(?:\\.|\/)(?:wmv|asf)$/i.test(String(mediaPath || ''))
        || /x-ms-(?:wmv|asf)/i.test(String(mimeType || ''));
    }

    function wpLocalVideoStatusText(state) {
      if (!state) return 'Đang chuẩn bị video trên máy này…';
      const pct = Math.max(0, Math.min(100, Math.round((Number(state.progress) || 0) * 100)));
      switch (state.status) {
        case 'cache': return 'Đang kiểm tra video đã chuyển…';
        case 'engine': return 'Đang nạp bộ chuyển video trên máy này…';
        case 'convert': return `Đang chuyển WMV → MP4 trên máy này${pct ? ` · ${pct}%` : '…'}`;
        case 'save': return 'Đang lưu video đã chuyển vào bộ nhớ trình duyệt…';
        case 'ready': return state.cached ? 'Video đã sẵn sàng từ bộ nhớ cục bộ.' : 'Video đã sẵn sàng.';
        case 'error': return state.error || 'Không chuyển được video trên máy này.';
        default: return 'Đang chuẩn bị video trên máy này…';
      }
    }

    function wpLocalVideoDbOpen() {
      if (!('indexedDB' in window)) return Promise.resolve(null);
      return new Promise((resolve) => {
        let request;
        try { request = indexedDB.open(WP_LOCAL_VIDEO_CACHE_DB, 1); }
        catch (_) { resolve(null); return; }
        request.onupgradeneeded = () => {
          const db = request.result;
          if (!db.objectStoreNames.contains(WP_LOCAL_VIDEO_CACHE_STORE)) {
            db.createObjectStore(WP_LOCAL_VIDEO_CACHE_STORE, { keyPath:'key' });
          }
        };
        request.onsuccess = () => resolve(request.result || null);
        request.onerror = () => resolve(null);
      });
    }

    async function wpLocalVideoCacheGet(key) {
      const db = await wpLocalVideoDbOpen();
      if (!db) return null;
      return new Promise((resolve) => {
        let tx;
        try { tx = db.transaction(WP_LOCAL_VIDEO_CACHE_STORE, 'readwrite'); }
        catch (_) { try { db.close(); } catch (_) {} resolve(null); return; }
        const store = tx.objectStore(WP_LOCAL_VIDEO_CACHE_STORE);
        const request = store.get(key);
        request.onsuccess = () => {
          const row = request.result;
          if (row && row.blob instanceof Blob) {
            // Mỗi lần dùng lại video sẽ cập nhật mốc LRU; không có hạn dùng theo ngày.
            row.lastUsed = Date.now();
            row.size = Number(row.size) || row.blob.size || 0;
            try { store.put(row); } catch (_) {}
            resolve(row.blob);
          } else resolve(null);
        };
        request.onerror = () => resolve(null);
        tx.oncomplete = () => { try { db.close(); } catch (_) {} };
        tx.onabort = () => { try { db.close(); } catch (_) {} };
      });
    }

    async function wpLocalVideoCachePrune(maxBytes = WP_LOCAL_VIDEO_CACHE_MAX_BYTES, protectedKey = '') {
      const db = await wpLocalVideoDbOpen();
      if (!db) return 0;
      return new Promise((resolve) => {
        let tx;
        try { tx = db.transaction(WP_LOCAL_VIDEO_CACHE_STORE, 'readwrite'); }
        catch (_) { try { db.close(); } catch (_) {} resolve(0); return; }
        const store = tx.objectStore(WP_LOCAL_VIDEO_CACHE_STORE);
        const request = store.getAll();
        let remaining = 0;
        request.onsuccess = () => {
          const rows = Array.isArray(request.result) ? request.result.slice() : [];
          rows.forEach((row) => {
            const blobSize = row && row.blob instanceof Blob ? row.blob.size : 0;
            row.__size = Math.max(0, Number(row && row.size) || blobSize || 0);
          });
          remaining = rows.reduce((sum, row) => sum + row.__size, 0);
          if (remaining <= maxBytes) return;
          rows.sort((a, b) => {
            const ta = Number(a && (a.lastUsed || a.savedAt)) || 0;
            const tb = Number(b && (b.lastUsed || b.savedAt)) || 0;
            return ta - tb;
          });
          for (const row of rows) {
            if (remaining <= maxBytes) break;
            if (!row || !row.key || String(row.key) === String(protectedKey || '')) continue;
            try { store.delete(row.key); remaining -= row.__size; } catch (_) {}
          }
        };
        request.onerror = () => {};
        tx.oncomplete = () => { try { db.close(); } catch (_) {} resolve(Math.max(0, remaining)); };
        tx.onerror = tx.onabort = () => { try { db.close(); } catch (_) {} resolve(Math.max(0, remaining)); };
      });
    }

    async function wpLocalVideoCachePut(key, blob) {
      if (!(blob instanceof Blob) || blob.size <= 0) return false;
      // Một video riêng lẻ lớn hơn 1 GiB sẽ vẫn phát trong phiên hiện tại nhưng không lưu cache.
      if (blob.size > WP_LOCAL_VIDEO_CACHE_MAX_BYTES) return false;

      // Dọn trước để dành chỗ cho video mới; xóa video lâu không dùng nhất trước.
      await wpLocalVideoCachePrune(Math.max(0, WP_LOCAL_VIDEO_CACHE_MAX_BYTES - blob.size));

      const db = await wpLocalVideoDbOpen();
      if (!db) return false;
      const ok = await new Promise((resolve) => {
        let tx;
        try { tx = db.transaction(WP_LOCAL_VIDEO_CACHE_STORE, 'readwrite'); }
        catch (_) { try { db.close(); } catch (_) {} resolve(false); return; }
        const now = Date.now();
        try {
          tx.objectStore(WP_LOCAL_VIDEO_CACHE_STORE).put({
            key, blob, savedAt:now, lastUsed:now, size:blob.size, mimeType:blob.type || 'video/mp4'
          });
        } catch (_) { resolve(false); return; }
        tx.oncomplete = () => { try { db.close(); } catch (_) {} resolve(true); };
        tx.onerror = tx.onabort = () => { try { db.close(); } catch (_) {} resolve(false); };
      });
      if (ok) await wpLocalVideoCachePrune(WP_LOCAL_VIDEO_CACHE_MAX_BYTES, key);
      return ok;
    }

    // Dọn một lần khi mở MVIP để cả cache cũ cũng tuân thủ giới hạn 1 GiB.
    setTimeout(() => {
      wpLocalVideoCachePrune(WP_LOCAL_VIDEO_CACHE_MAX_BYTES).catch(() => {});
    }, 0);

    async function wpSha256Hex(bytes) {
      if (!(bytes instanceof Uint8Array) || !window.crypto || !crypto.subtle) {
        let hash = 2166136261;
        const step = Math.max(1, Math.floor((bytes && bytes.length || 0) / 4096));
        for (let i = 0; bytes && i < bytes.length; i += step) {
          hash ^= bytes[i]; hash = Math.imul(hash, 16777619) >>> 0;
        }
        return `fallback-${bytes ? bytes.length : 0}-${hash.toString(16)}`;
      }
      const digest = await crypto.subtle.digest('SHA-256', bytes);
      return Array.from(new Uint8Array(digest), (b) => b.toString(16).padStart(2, '0')).join('');
    }

    function wpLocalVideoObjectUrl(blob) {
      const url = URL.createObjectURL(blob);
      wpOrdinaryState.pptxObjectUrls.push(url);
      return url;
    }

    async function wpEnsureLocalFfmpeg() {
      if (wpLocalFfmpegPromise) return wpLocalFfmpegPromise;
      wpLocalFfmpegPromise = (async () => {
        const module = await import(WP_FFMPEG_WRAPPER_URL);
        if (!module || typeof module.FFmpeg !== 'function') {
          throw new Error('Không nạp được bộ chuyển video cục bộ.');
        }
        /* @ffmpeg/ffmpeg cần một worker cùng nguồn. Ta tạo một worker blob rất
           nhỏ rồi để worker đó import module chính từ CDN. Chỉ mã ffmpeg.wasm
           (~31 MB ở lần đầu) được tải về; video của giáo viên không rời máy. */
        const bootstrap = `import ${JSON.stringify(WP_FFMPEG_WORKER_URL)};`;
        const classWorkerURL = URL.createObjectURL(new Blob([bootstrap], { type:'text/javascript' }));
        const ffmpeg = new module.FFmpeg();
        try {
          await ffmpeg.load({
            classWorkerURL,
            coreURL:`${WP_FFMPEG_CORE_BASE}/ffmpeg-core.js`,
            wasmURL:`${WP_FFMPEG_CORE_BASE}/ffmpeg-core.wasm`,
          });
        } finally {
          try { URL.revokeObjectURL(classWorkerURL); } catch (_) {}
        }
        return ffmpeg;
      })().catch((error) => {
        wpLocalFfmpegPromise = null;
        throw error;
      });
      return wpLocalFfmpegPromise;
    }

    function wpQueueLocalVideoTask(task) {
      const run = wpLocalVideoQueue.then(task, task);
      wpLocalVideoQueue = run.catch(() => {});
      return run;
    }

    async function wpTranscodeLegacyVideoLocally(bytes, extension, state) {
      return wpQueueLocalVideoTask(async () => {
        state.status = 'engine';
        const ffmpeg = await wpEnsureLocalFfmpeg();
        state.status = 'convert';
        state.progress = 0;
        const serial = ++wpLocalVideoJobSerial;
        const inputName = `mvip_input_${serial}.${extension || 'wmv'}`;
        const outputName = `mvip_output_${serial}.mp4`;
        const progressHandler = ({ progress }) => {
          const value = Number(progress);
          if (Number.isFinite(value)) state.progress = Math.max(0, Math.min(1, value));
        };
        ffmpeg.on('progress', progressHandler);
        try {
          /* writeFile chuyển ownership của ArrayBuffer sang worker; dùng một bản
             sao để phần hash/cache ở luồng chính không bị detach ngoài ý muốn. */
          await ffmpeg.writeFile(inputName, new Uint8Array(bytes));
          let exitCode = await ffmpeg.exec([
            '-hide_banner', '-y', '-i', inputName,
            '-c:v', 'libx264', '-preset', 'ultrafast', '-crf', '24',
            '-c:a', 'aac', '-b:a', '128k',
            '-movflags', '+faststart', outputName,
          ]);
          if (Number(exitCode) !== 0) {
            try { await ffmpeg.deleteFile(outputName); } catch (_) {}
            exitCode = await ffmpeg.exec([
              '-hide_banner', '-y', '-i', inputName,
              '-movflags', '+faststart', outputName,
            ]);
          }
          if (Number(exitCode) !== 0) throw new Error('Bộ chuyển video trả về lỗi.');
          const data = await ffmpeg.readFile(outputName);
          const out = data instanceof Uint8Array ? data : new Uint8Array(data || []);
          if (!out.length) throw new Error('Video MP4 sau khi chuyển bị rỗng.');
          state.progress = 1;
          return new Blob([out], { type:'video/mp4' });
        } finally {
          ffmpeg.off('progress', progressHandler);
          try { await ffmpeg.deleteFile(inputName); } catch (_) {}
          try { await ffmpeg.deleteFile(outputName); } catch (_) {}
        }
      });
    }

    async function wpPrepareLegacyPptxVideo(zip, mediaPath, state) {
      try {
        state.status = 'cache';
        const zipEntry = zip.file(String(mediaPath || '').replace(/^\/+/, ''));
        if (!zipEntry) throw new Error('Không đọc được video nhúng trong PowerPoint.');
        const bytes = await zipEntry.async('uint8array');
        const digest = await wpSha256Hex(bytes);
        const cacheKey = `pptx-video-sha256:${digest}`;
        state.cacheKey = cacheKey;
        const cached = await wpLocalVideoCacheGet(cacheKey);
        if (cached && cached.size > 0) {
          state.status = 'ready'; state.progress = 1; state.cached = true;
          return { url:wpLocalVideoObjectUrl(cached), mimeType:'video/mp4', cached:true };
        }
        const extension = (String(mediaPath || '').split('.').pop() || 'wmv').toLowerCase();
        const mp4Blob = await wpTranscodeLegacyVideoLocally(bytes, extension, state);
        state.status = 'save';
        await wpLocalVideoCachePut(cacheKey, mp4Blob);
        state.status = 'ready'; state.progress = 1; state.cached = false;
        return { url:wpLocalVideoObjectUrl(mp4Blob), mimeType:'video/mp4', cached:false };
      } catch (error) {
        state.status = 'error';
        state.error = (error && error.message)
          ? `Không chuyển được video trên máy này: ${error.message}`
          : 'Không chuyển được video trên máy này.';
        throw error;
      }
    }

    async function wpPptxObjectUrl(zip, packagePath, objectUrlCache) {
      const normalizedPath = String(packagePath || '').replace(/^\/+/, '');
      if (!normalizedPath || !zip.file(normalizedPath)) return '';
      if (objectUrlCache.has(normalizedPath)) return objectUrlCache.get(normalizedPath);
      const bytes = await zip.file(normalizedPath).async('uint8array');
      const objectUrl = URL.createObjectURL(new Blob([bytes], { type: wpPptxMimeType(normalizedPath) }));
      objectUrlCache.set(normalizedPath, objectUrl);
      wpOrdinaryState.pptxObjectUrls.push(objectUrl);
      return objectUrl;
    }

    async function wpPptxInteractionsFromXml(zip, entry, documentXml, relationships, objectUrlCache, slideIndexByNumber) {
      const videos = [];
      const audios = [];
      const links = [];
      const mediaShapeIds = new Set();
      for (const videoFile of wpPptxXmlElements(documentXml, 'videoFile')) {
        const shapeDetails = wpPptxShapeDetailsFromNode(videoFile);
        const shapeId = shapeDetails.id;
        if (!shapeId || mediaShapeIds.has(shapeId)) continue;
        const shape = (() => {
          let current = videoFile;
          while (current) {
            const name = String(current.localName || current.nodeName || '').split(':').pop();
            if (['pic', 'sp', 'graphicFrame'].includes(name)) return current;
            current = current.parentElement;
          }
          return null;
        })();
        const embeddedMedia = shape ? wpPptxXmlElements(shape, 'media')[0] : null;
        const embeddedRelId = wpPptxRelationshipId(embeddedMedia, 'embed');
        const linkedRelId = wpPptxRelationshipId(videoFile, 'link');
        const mediaRelationship = relationships.get(embeddedRelId)
          || relationships.get(linkedRelId)
          || null;
        if (!mediaRelationship || /external/i.test(mediaRelationship.targetMode)
          || /^NULL$/i.test(mediaRelationship.target)) continue;
        const mediaPath = wpPptxPackagePath(entry.path, mediaRelationship.target);
        const mediaMimeType = wpPptxMimeType(mediaPath);
        const localLegacyVideo = wpPptxLegacyBrowserVideo(mediaPath, mediaMimeType);
        const localTranscodeState = localLegacyVideo
          ? { status:'queued', progress:0, error:'', cached:false, cacheKey:'' }
          : null;
        const localSourcePromise = localLegacyVideo
          ? wpPrepareLegacyPptxVideo(zip, mediaPath, localTranscodeState)
          : null;
        if (localSourcePromise) localSourcePromise.catch(() => {});
        const sourceUrl = localLegacyVideo ? '' : await wpPptxObjectUrl(zip, mediaPath, objectUrlCache);
        if (!sourceUrl && !localLegacyVideo) continue;
        const posterBlip = shape ? wpPptxXmlElements(shape, 'blip')[0] : null;
        const posterRelId = wpPptxRelationshipId(posterBlip, 'embed');
        const posterRelationship = relationships.get(posterRelId) || null;
        const posterPath = posterRelationship && !/external/i.test(posterRelationship.targetMode)
          ? wpPptxPackagePath(entry.path, posterRelationship.target)
          : '';
        const posterUrl = posterPath
          ? await wpPptxObjectUrl(zip, posterPath, objectUrlCache)
          : '';
        const startMs = Math.max(0, Number(embeddedMedia && embeddedMedia.getAttribute('st')) || 0);
        const endMs = Math.max(0, Number(embeddedMedia && embeddedMedia.getAttribute('end')) || 0);
        videos.push({
          shapeId,
          shapeName: shapeDetails.name,
          shapeText: shapeDetails.text,
          bounds: shapeDetails.bounds,
          sourceUrl,
          posterUrl,
          mimeType: mediaMimeType,
          mediaPath,
          localLegacyVideo,
          localTranscodeState,
          localSourcePromise,
          localReadySource: null,
          fallbackSeconds: Math.max(1, Number((shapeDetails.name.match(/(\d+)\s*(?:seconds?|giây)/i) || [])[1]) || 60),
          startSeconds: startMs / 1000,
          endSeconds: endMs / 1000,
          clickToPlay: !!(shape && wpPptxXmlElements(shape, 'hlinkClick')
            .some((hyperlink) => /ppaction:\/\/media/i.test(String(hyperlink.getAttribute('action') || '')))),
        });
        mediaShapeIds.add(shapeId);
      }

      for (const audioFile of wpPptxXmlElements(documentXml, 'audioFile')) {
        const shapeDetails = wpPptxShapeDetailsFromNode(audioFile);
        const shapeId = shapeDetails.id;
        if (!shapeId || mediaShapeIds.has(shapeId)) continue;
        const shape = (() => {
          let current = audioFile;
          while (current) {
            const name = String(current.localName || current.nodeName || '').split(':').pop();
            if (['pic', 'sp', 'graphicFrame'].includes(name)) return current;
            current = current.parentElement;
          }
          return null;
        })();
        const embeddedMedia = shape ? wpPptxXmlElements(shape, 'media')[0] : null;
        const embeddedRelId = wpPptxRelationshipId(embeddedMedia, 'embed');
        const linkedRelId = wpPptxRelationshipId(audioFile, 'link');
        const mediaRelationship = relationships.get(embeddedRelId)
          || relationships.get(linkedRelId)
          || null;
        if (!mediaRelationship || /external/i.test(mediaRelationship.targetMode)
          || /^NULL$/i.test(mediaRelationship.target)) continue;
        const mediaPath = wpPptxPackagePath(entry.path, mediaRelationship.target);
        const sourceUrl = await wpPptxObjectUrl(zip, mediaPath, objectUrlCache);
        if (!sourceUrl) continue;
        const startMs = Math.max(0, Number(embeddedMedia && embeddedMedia.getAttribute('st')) || 0);
        const endMs = Math.max(0, Number(embeddedMedia && embeddedMedia.getAttribute('end')) || 0);
        audios.push({
          shapeId,
          shapeName: shapeDetails.name,
          shapeText: shapeDetails.text,
          bounds: shapeDetails.bounds,
          sourceUrl,
          mimeType: wpPptxMimeType(mediaPath),
          mediaPath,
          startSeconds: startMs / 1000,
          endSeconds: endMs / 1000,
          clickToPlay: !!(shape && wpPptxXmlElements(shape, 'hlinkClick')
            .some((hyperlink) => /ppaction:\/\/media/i.test(String(hyperlink.getAttribute('action') || '')))),
        });
        mediaShapeIds.add(shapeId);
      }

      const linkKeys = new Set();
      wpPptxXmlElements(documentXml, 'hlinkClick').forEach((hyperlink, linkIndex) => {
        const relationshipId = wpPptxRelationshipId(hyperlink, 'id');
        const relationship = relationships.get(relationshipId) || null;
        const action = String(hyperlink.getAttribute('action') || '').trim();
        if (!relationship && (!action || /ppaction:\/\/media/i.test(action))) return;
        const shapeDetails = wpPptxShapeDetailsFromNode(hyperlink);
        const shapeId = shapeDetails.id;
        if (!shapeId || mediaShapeIds.has(shapeId)) return;
        let href = '';
        let slideIndex = -1;
        if (relationship) {
          if (/\/hyperlink$/i.test(relationship.type) && /external/i.test(relationship.targetMode)) {
            href = relationship.target;
          } else if (/\/slide$/i.test(relationship.type)) {
            const slideMatch = relationship.target.match(/slide(\d+)\.xml$/i);
            if (slideMatch) slideIndex = slideIndexByNumber.get(Number(slideMatch[1])) ?? -1;
          }
        }
        if (!href && slideIndex < 0 && !action) return;
        const key = `${shapeId}|${href}|${slideIndex}|${action}|${linkIndex}`;
        if (linkKeys.has(key)) return;
        linkKeys.add(key);
        let run = hyperlink.parentElement;
        while (run && String(run.localName || run.nodeName || '').split(':').pop() !== 'r') {
          run = run.parentElement;
        }
        const label = String(run && run.textContent || '').trim()
          || shapeDetails.text
          || shapeDetails.name
          || 'Mở liên kết trong PowerPoint';
        links.push({
          shapeId,
          shapeName: shapeDetails.name,
          shapeText: shapeDetails.text,
          bounds: shapeDetails.bounds,
          href,
          slideIndex,
          action,
          label,
          textLink: !!run,
          // PowerPoint underlines hyperlink text even when a:rPr omits u.
          // Keep an explicitly chosen underline (including u="none").
          underline: String(run && Array.from(run.children).find(node =>
            String(node.localName || '') === 'rPr')?.getAttribute('u') || 'sng'),
        });
      });
      return { videos, audios, links };
    }

    async function wpPptxResolveTriggerSounds(zip, entry, triggers, relationships, objectUrlCache) {
      for (const trigger of triggers) {
        for (const action of (Array.isArray(trigger.actions) ? trigger.actions : [])) {
          if (!action || action.type !== 'sound' || !action.relationshipId) continue;
          const relationship = relationships.get(action.relationshipId) || null;
          if (!relationship || /external/i.test(relationship.targetMode)
            || /^NULL$/i.test(relationship.target)) continue;
          const mediaPath = wpPptxPackagePath(entry.path, relationship.target);
          const sourceUrl = await wpPptxObjectUrl(zip, mediaPath, objectUrlCache);
          if (!sourceUrl) continue;
          action.sourceUrl = sourceUrl;
          action.mimeType = wpPptxMimeType(mediaPath);
          action.mediaPath = mediaPath;
        }
      }
      return triggers;
    }

    async function wpReadPowerPointSlidePlans(arrayBuffer) {
      if (!window.JSZip || typeof window.JSZip.loadAsync !== 'function') return [];
      const zip = await window.JSZip.loadAsync(arrayBuffer);
      let slideEntries = Object.keys(zip.files || {})
        .map((path) => {
          const match = path.match(/^ppt\/slides\/slide(\d+)\.xml$/i);
          return match ? { path, number: Number(match[1]) } : null;
        })
        .filter(Boolean)
        .sort((left, right) => left.number - right.number);
      const parser = new DOMParser();
      const objectUrlCache = new Map();
      let slideSize = { width: 12192000, height: 6858000 };
      const presentationFile = zip.file('ppt/presentation.xml');
      if (presentationFile) {
        try {
          const presentationXml = parser.parseFromString(
            await presentationFile.async('text'), 'application/xml'
          );
          // Slide part filenames need not follow the order shown in PowerPoint.
          const presentationRels = zip.file('ppt/_rels/presentation.xml.rels');
          if (presentationRels) {
            const relationships = wpPptxRelationshipMap(parser.parseFromString(
              await presentationRels.async('text'), 'application/xml'
            ));
            const byPath = new Map(slideEntries.map((entry) => [entry.path, entry]));
            const ordered = wpPptxXmlElements(presentationXml, 'sldId').map((node) => {
              const rel = relationships.get(wpPptxRelationshipId(node));
              return rel ? byPath.get(wpPptxPackagePath('ppt/presentation.xml', rel.target)) : null;
            }).filter(Boolean);
            if (ordered.length) slideEntries = ordered;
          }
          const sizeNode = wpPptxXmlElements(presentationXml, 'sldSz')[0];
          const width = Number(sizeNode && sizeNode.getAttribute('cx')) || 0;
          const height = Number(sizeNode && sizeNode.getAttribute('cy')) || 0;
          if (width > 0 && height > 0) slideSize = { width, height };
        } catch (_) {}
      }
      const slideIndexByNumber = new Map(slideEntries.map((entry, index) => [entry.number, index]));
      const plans = [];
      for (const entry of slideEntries) {
        const source = await zip.file(entry.path).async('text');
        const xml = parser.parseFromString(source, 'application/xml');
        const relationshipPath = `ppt/slides/_rels/slide${entry.number}.xml.rels`;
        const relationshipFile = zip.file(relationshipPath);
        const relationshipXml = relationshipFile
          ? parser.parseFromString(await relationshipFile.async('text'), 'application/xml')
          : null;
        const relationships = relationshipXml ? wpPptxRelationshipMap(relationshipXml) : new Map();
        let interactions = { videos: [], audios: [], links: [] };
        try {
          interactions = await wpPptxInteractionsFromXml(
            zip, entry, xml, relationships, objectUrlCache, slideIndexByNumber
          );
        } catch (error) {
          console.warn('Không đọc được media hoặc liên kết của một slide PowerPoint:', error);
        }
        const triggers = wpPptxInteractiveTriggersFromXml(xml);
        try {
          await wpPptxResolveTriggerSounds(zip, entry, triggers, relationships, objectUrlCache);
        } catch (error) {
          console.warn('Không đọc được âm thanh trigger của một slide PowerPoint:', error);
        }
        const animationGroups = wpPptxAnimationGroupsFromXml(xml);
        try {
          await wpPptxAttachFallbackParagraphSlices(
            zip, entry, xml, relationships, animationGroups
          );
        } catch (error) {
          console.warn('Không tách được từng đoạn của ảnh dự phòng PowerPoint:', error);
        }
        plans.push({
          slideSize,
          /* Slide có ảnh nền phủ toàn trang cần dựng bằng viewer chính:
             trang dựng sẵn từ viewer ẩn có thể mang tỉ lệ/offset riêng. */
          requiresNativeSlideRender: wpPptxFixFullSlidePicturePlaceholders(
            xml, slideSize.width, slideSize.height
          ) > 0,
          hidden: /^(?:0|false|off)$/i.test(String(xml.documentElement.getAttribute('show') || '').trim()),
          hiddenShapeIds: wpPptxHiddenShapeIdsFromXml(xml),
          interactiveEntranceShapeIds: wpPptxInteractiveEntranceShapeIdsFromXml(xml),
          answerLabelShapeIds: wpPptxAnswerLabelShapeIdsFromXml(xml, slideSize),
          spacedParagraphs: wpPptxSpacedParagraphsFromXml(xml),
          transition: wpPptxTransitionFromXml(xml),
          groups: animationGroups,
          videos: interactions.videos,
          audios: interactions.audios,
          links: interactions.links,
          triggers,
          coordinateHitAreas: (interactions.links.length + triggers.length) >= 20
            || interactions.links.some((entry) => /^ppaction:\/\/macro/i.test(String(entry.action || ''))),
        });
      }
      return plans;
    }

    /* MVIP 2026-10-13: Giữ công thức đồng vị (số khối ở trên, số proton ở
       dưới, kí hiệu nguyên tố bên phải) trong ô bảng PowerPoint. Renderer chỉ
       đọc DrawingML; Office Math m:sPre thuộc nhánh Choice bị bỏ khi lấy
       Fallback. Vẽ lớp PNG trong suốt đúng ô, không làm phẳng thành "816O". */
    async function wpPptxPrepareIsotopeTableOverlays(choice, fallback, overlays) {
      if (!(choice instanceof Element) || !(fallback instanceof Element)
        || !Array.isArray(overlays)) return 0;
      const sourceTable = wpPptxXmlElements(choice, 'tbl')[0];
      const targetTable = wpPptxXmlElements(fallback, 'tbl')[0];
      if (!(sourceTable instanceof Element) || !(targetTable instanceof Element)) return 0;
      const frame = wpPptxXmlElements(fallback, 'graphicFrame')[0];
      if (!(frame instanceof Element)) return 0;
      const transform = Array.from(frame.children).find((node) => node.localName === 'xfrm');
      const off = transform && Array.from(transform.children).find((node) => node.localName === 'off');
      const ext = transform && Array.from(transform.children).find((node) => node.localName === 'ext');
      if (!(off instanceof Element) || !(ext instanceof Element)) return 0;
      const x = Number(off.getAttribute('x'));
      const y = Number(off.getAttribute('y'));
      const frameWidth = Number(ext.getAttribute('cx'));
      const frameHeight = Number(ext.getAttribute('cy'));
      if (![x, y, frameWidth, frameHeight].every(Number.isFinite)
        || frameWidth <= 0 || frameHeight <= 0) return 0;
      const sourceRows = Array.from(sourceTable.children).filter((node) => node.localName === 'tr');
      const targetRows = Array.from(targetTable.children).filter((node) => node.localName === 'tr');
      if (sourceRows.length !== targetRows.length) return 0;
      const grid = wpPptxXmlElements(targetTable, 'gridCol')
        .map((node) => Number(node.getAttribute('w')) || 0);
      const gridTotal = grid.reduce((sum, value) => sum + value, 0);
      const rowHeights = targetRows.map((node) => Number(node.getAttribute('h')) || 0);
      const rowTotal = rowHeights.reduce((sum, value) => sum + value, 0);
      if (!gridTotal || !rowTotal) return 0;
      const collectText = (node) => wpPptxXmlElements(node, 't')
        .map((entry) => String(entry.textContent || '')).join('').normalize('NFKC').trim();
      let restored = 0;
      let precedingRows = 0;
      for (let ri = 0; ri < sourceRows.length; ri += 1) {
        const sourceCells = Array.from(sourceRows[ri].children).filter((node) => node.localName === 'tc');
        const targetCells = Array.from(targetRows[ri].children).filter((node) => node.localName === 'tc');
        let precedingColumns = 0;
        for (let ci = 0; ci < sourceCells.length; ci += 1) {
          const widthFraction = grid[ci] / gridTotal;
          if (!(targetCells[ci] instanceof Element) || !(widthFraction > 0)) continue;
          const prescript = wpPptxXmlElements(sourceCells[ci], 'sPre')[0];
          if (!(prescript instanceof Element)) { precedingColumns += grid[ci]; continue; }
          const child = (name) => Array.from(prescript.children)
            .find((node) => node.localName === name);
          const sub = collectText(child('sub'));
          const sup = collectText(child('sup'));
          const symbol = collectText(child('e'));
          if (!/^\d{1,3}$/.test(sub) || !/^\d{1,3}$/.test(sup)
            || !/^[A-Za-z]{1,3}$/.test(symbol)) {
            precedingColumns += grid[ci];
            continue;
          }
          const rect = {
            x: x + frameWidth * precedingColumns / gridTotal,
            y: y + frameHeight * precedingRows / rowTotal,
            cx: frameWidth * widthFraction,
            cy: frameHeight * rowHeights[ri] / rowTotal,
          };
          precedingColumns += grid[ci];
          const pxWidth = rect.cx / 9525;
          const pxHeight = rect.cy / 9525;
          if (pxWidth < 20 || pxHeight < 20) continue;
          try {
            const factor = 3;
            const canvas = document.createElement('canvas');
            canvas.width = Math.max(64, Math.round(pxWidth * factor));
            canvas.height = Math.max(64, Math.round(pxHeight * factor));
            const ctx = canvas.getContext('2d', {alpha: true});
            if (!ctx) continue;
            ctx.scale(factor, factor);
            ctx.clearRect(0, 0, pxWidth, pxHeight);
            const mainSize = Math.max(16, Math.min(32, pxHeight * .34, pxWidth * .35));
            const smallSize = mainSize * .64;
            ctx.fillStyle = '#111111';
            ctx.textAlign = 'left';
            ctx.textBaseline = 'alphabetic';
            ctx.font = `bold ${smallSize}px "Times New Roman", serif`;
            const indicesWidth = Math.max(ctx.measureText(sup).width, ctx.measureText(sub).width);
            ctx.font = `italic bold ${mainSize}px "Times New Roman", serif`;
            const symbolWidth = ctx.measureText(symbol).width;
            const start = (pxWidth - (indicesWidth + 2 + symbolWidth)) / 2;
            const middleY = pxHeight / 2;
            ctx.font = `bold ${smallSize}px "Times New Roman", serif`;
            ctx.fillText(sup, start + indicesWidth - ctx.measureText(sup).width, middleY - mainSize * .12);
            ctx.fillText(sub, start + indicesWidth - ctx.measureText(sub).width, middleY + mainSize * .53);
            ctx.font = `italic bold ${mainSize}px "Times New Roman", serif`;
            ctx.fillText(symbol, start + indicesWidth + 2, middleY + mainSize * .30);
            const bytes = wpPptxDataUrlBytes(canvas.toDataURL('image/png'));
            if (!bytes.length) continue;
            const paragraph = wpPptxXmlElements(targetCells[ci], 'p')[0];
            if (!(paragraph instanceof Element)) continue;
            /* Xóa văn bản phẳng đã thêm vào Fallback, chỉ khi đã có ảnh
               thay thế hợp lệ. Giữ pPr để bảo toàn cấu trúc bảng. */
            Array.from(paragraph.children).forEach((node) => {
              if (node.localName !== 'pPr' && node.localName !== 'endParaRPr') node.remove();
            });
            overlays.push({ ...rect, bytes });
            restored += 1;
          } catch (error) {
            console.warn('Không dựng được ký hiệu nguyên tử trong bảng PowerPoint:', error);
          }
        }
        precedingRows += rowHeights[ri];
      }
      return restored;
    }

    async function wpPptxInsertTableIsotopeOverlays(zip, slidePath, xml, overlays, parser, serializer) {
      if (!Array.isArray(overlays) || !overlays.length) return 0;
      const pNs = 'http://schemas.openxmlformats.org/presentationml/2006/main';
      const aNs = 'http://schemas.openxmlformats.org/drawingml/2006/main';
      const rNs = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';
      const relNs = 'http://schemas.openxmlformats.org/package/2006/relationships';
      const spTree = wpPptxXmlElements(xml, 'spTree')[0];
      if (!(spTree instanceof Element)) return 0;
      const relationshipPath = String(slidePath).replace(/^ppt\/slides\//i,'ppt/slides/_rels/') + '.rels';
      const existingFile = zip.file(relationshipPath);
      const relDoc = parser.parseFromString(existingFile ? await existingFile.async('text')
        : `<Relationships xmlns="${relNs}"/>`, 'application/xml');
      let maxId = Math.max(0, ...wpPptxXmlElements(xml, 'cNvPr')
        .map((node) => Number(node.getAttribute('id')) || 0));
      let maxRid = Math.max(0, ...wpPptxXmlElements(relDoc, 'Relationship')
        .map((node) => Number((String(node.getAttribute('Id') || '').match(/^rId(\d+)$/i)||[])[1]) || 0));
      const slideNo = (String(slidePath).match(/slide(\d+)\.xml$/i) || [])[1] || '0';
      for (const item of overlays) {
        const rid = `rId${++maxRid}`;
        const id = String(++maxId);
        const mediaName = `mvip_isotope_s${slideNo}_${id}.png`;
        zip.file(`ppt/media/${mediaName}`, item.bytes);
        const rel = relDoc.createElementNS(relNs, 'Relationship');
        rel.setAttribute('Id', rid);
        rel.setAttribute('Type', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image');
        rel.setAttribute('Target', `../media/${mediaName}`);
        relDoc.documentElement.appendChild(rel);
        const pic = xml.createElementNS(pNs, 'p:pic');
        const nv = xml.createElementNS(pNs, 'p:nvPicPr');
        const cnv = xml.createElementNS(pNs, 'p:cNvPr');
        cnv.setAttribute('id', id);
        cnv.setAttribute('name', 'MVIP nguyên tử - Office Math');
        nv.appendChild(cnv);
        nv.appendChild(xml.createElementNS(pNs, 'p:cNvPicPr'));
        nv.appendChild(xml.createElementNS(pNs, 'p:nvPr'));
        pic.appendChild(nv);
        const fill = xml.createElementNS(pNs, 'p:blipFill');
        const blip = xml.createElementNS(aNs, 'a:blip');
        blip.setAttributeNS(rNs,'r:embed',rid);
        fill.appendChild(blip);
        const stretch = xml.createElementNS(aNs, 'a:stretch');
        stretch.appendChild(xml.createElementNS(aNs, 'a:fillRect'));
        fill.appendChild(stretch);
        pic.appendChild(fill);
        const spPr = xml.createElementNS(pNs, 'p:spPr');
        const transform = xml.createElementNS(aNs, 'a:xfrm');
        const off = xml.createElementNS(aNs, 'a:off');
        off.setAttribute('x', String(Math.round(item.x)));
        off.setAttribute('y', String(Math.round(item.y)));
        transform.appendChild(off);
        const ext = xml.createElementNS(aNs, 'a:ext');
        ext.setAttribute('cx', String(Math.round(item.cx)));
        ext.setAttribute('cy', String(Math.round(item.cy)));
        transform.appendChild(ext);
        spPr.appendChild(transform);
        const geometry = xml.createElementNS(aNs, 'a:prstGeom');
        geometry.setAttribute('prst', 'rect');
        geometry.appendChild(xml.createElementNS(aNs, 'a:avLst'));
        spPr.appendChild(geometry);
        pic.appendChild(spPr);
        spTree.appendChild(pic);
      }
      zip.file(relationshipPath, serializer.serializeToString(relDoc));
      await wpPptxEnsurePngContentType(zip, parser, serializer);
      return overlays.length;
    }

    function wpPptxFixFullSlidePicturePlaceholders(xml, slideWidth, slideHeight) {
      /* Ảnh nền toàn slide có p:ph idx=1 nhưng cũng có a:xfrm 0,0,cx,cy.
         Một số web renderer lấy nhầm cả khung placeholder trong layout,
         đẩy ảnh xuống và crop mất mép dưới. Ảnh này đã có hình học riêng,
         nên bỏ quan hệ kế thừa placeholder, giữ nguyên xfrm và media. */
      if (!(slideWidth > 0 && slideHeight > 0)) return 0;
      let count = 0;
      wpPptxXmlElements(xml, 'pic').forEach((pic) => {
        const spPr = Array.from(pic.children).find((node) => node.localName === 'spPr');
        const transform = spPr && Array.from(spPr.children).find((node) => node.localName === 'xfrm');
        const off = transform && Array.from(transform.children).find((node) => node.localName === 'off');
        const ext = transform && Array.from(transform.children).find((node) => node.localName === 'ext');
        const nv = Array.from(pic.children).find((node) => node.localName === 'nvPicPr');
        const nvPr = nv && Array.from(nv.children).find((node) => node.localName === 'nvPr');
        const ph = nvPr && Array.from(nvPr.children).find((node) => node.localName === 'ph');
        if (!(ph instanceof Element) || !(off instanceof Element) || !(ext instanceof Element)) return;
        const x = Number(off.getAttribute('x')) || 0;
        const y = Number(off.getAttribute('y')) || 0;
        const w = Number(ext.getAttribute('cx')) || 0;
        const h = Number(ext.getAttribute('cy')) || 0;
        if (Math.abs(x) > slideWidth * .01 || Math.abs(y) > slideHeight * .01
          || w < slideWidth * .98 || h < slideHeight * .98) return;
        ph.remove();
        count++;
      });
      return count;
    }

    function wpPptxRestoreTableMathInFallback(choice, fallback, documentXml) {
      if (!(choice instanceof Element) || !(fallback instanceof Element)
        || !(documentXml instanceof XMLDocument)) return 0;
      const choiceTable = wpPptxXmlElements(choice, 'tbl')[0];
      const fallbackTable = wpPptxXmlElements(fallback, 'tbl')[0];
      if (!(choiceTable instanceof Element) || !(fallbackTable instanceof Element)) return 0;
      const sourceCells = wpPptxXmlElements(choiceTable, 'tc');
      const targetCells = wpPptxXmlElements(fallbackTable, 'tc');
      let restored = 0;
      sourceCells.forEach((sourceCell, cellIndex) => {
        const targetCell = targetCells[cellIndex];
        if (!(targetCell instanceof Element)) return;
        const mathNodes = wpPptxXmlElements(sourceCell, 'm').filter((node) => (
          /\/drawing\/2010\/main$/i.test(String(node.namespaceURI || ''))
        ));
        if (!mathNodes.length) return;
        const mathText = mathNodes.map((mathNode) => (
          wpPptxXmlElements(mathNode, 't').map((textNode) => (
            String(textNode.textContent || '')
          )).join('')
        )).join('').normalize('NFKC');
        if (!mathText.trim()) return;
        const targetParagraph = wpPptxXmlElements(targetCell, 'p')[0];
        if (!(targetParagraph instanceof Element)) return;
        const sourceParagraph = wpPptxXmlElements(sourceCell, 'p')[0];
        /* Fallback của PowerPoint bỏ hoàn toàn Office Math trong ô bảng.
           Chuyển công thức đơn giản thành run DrawingML để trình dựng web đọc
           được, đồng thời sao chép lại căn giữa của đoạn từ bản Choice. */
        Array.from(targetParagraph.children || []).forEach((child) => {
          const childName = String(child.localName || child.nodeName || '').split(':').pop();
          if (!['pPr', 'endParaRPr'].includes(childName)) child.remove();
        });
        const drawingNamespace = 'http://schemas.openxmlformats.org/drawingml/2006/main';
        let targetParagraphProperties = Array.from(targetParagraph.children || []).find((child) => (
          String(child.localName || child.nodeName || '').split(':').pop() === 'pPr'
        ));
        const sourceParagraphProperties = sourceParagraph instanceof Element
          ? Array.from(sourceParagraph.children || []).find((child) => (
            String(child.localName || child.nodeName || '').split(':').pop() === 'pPr'
          )) : null;
        if (sourceParagraphProperties instanceof Element) {
          const copiedParagraphProperties = sourceParagraphProperties.cloneNode(true);
          if (targetParagraphProperties instanceof Element) {
            targetParagraph.replaceChild(copiedParagraphProperties, targetParagraphProperties);
          } else {
            targetParagraph.insertBefore(copiedParagraphProperties, targetParagraph.firstChild);
          }
          targetParagraphProperties = copiedParagraphProperties;
        }
        if (!(targetParagraphProperties instanceof Element)) {
          targetParagraphProperties = documentXml.createElementNS(drawingNamespace, 'a:pPr');
          targetParagraph.insertBefore(targetParagraphProperties, targetParagraph.firstChild);
        }
        targetParagraphProperties.setAttribute('algn', 'ctr');
        const targetCellProperties = wpPptxXmlElements(targetCell, 'tcPr')[0];
        if (targetCellProperties instanceof Element) targetCellProperties.setAttribute('anchor', 'ctr');
        const run = documentXml.createElementNS(drawingNamespace, 'a:r');
        const sourceRunProperties = mathNodes.flatMap((mathNode) => (
          wpPptxXmlElements(mathNode, 'rPr')
        ))[0];
        if (sourceRunProperties instanceof Element) {
          const copiedRunProperties = sourceRunProperties.cloneNode(true);
          /* Office Math đánh dấu run là italic dù PowerPoint đang trình bày
             các giá trị bảng theo kiểu chữ đứng. Loại bỏ thuộc tính này khi
             chuyển sang DrawingML để không làm cả ô bị nghiêng. */
          copiedRunProperties.setAttribute('i', '0');
          run.appendChild(copiedRunProperties);
        } else {
          const runProperties = documentXml.createElementNS(drawingNamespace, 'a:rPr');
          runProperties.setAttribute('i', '0');
          run.appendChild(runProperties);
        }
        const textNode = documentXml.createElementNS(drawingNamespace, 'a:t');
        textNode.textContent = mathText;
        run.appendChild(textNode);
        const endProperties = Array.from(targetParagraph.children || []).find((child) => (
          String(child.localName || child.nodeName || '').split(':').pop() === 'endParaRPr'
        ));
        targetParagraph.insertBefore(run, endProperties || null);
        restored += 1;
      });
      return restored;
    }

    function wpPptxDataUrlBytes(dataUrl) {
      const value = String(dataUrl || '').trim();
      const commaIndex = value.indexOf(',');
      if (commaIndex < 0 || !/;base64/i.test(value.slice(0, commaIndex))) return new Uint8Array();
      try {
        const binary = atob(value.slice(commaIndex + 1));
        const bytes = new Uint8Array(binary.length);
        for (let index = 0; index < binary.length; index += 1) {
          bytes[index] = binary.charCodeAt(index) & 0xff;
        }
        return bytes;
      } catch (_) {
        return new Uint8Array();
      }
    }

    function wpPptxEnsurePngContentType(zip, parser, serializer) {
      const contentTypesFile = zip.file('[Content_Types].xml');
      if (!contentTypesFile) return Promise.resolve(false);
      return contentTypesFile.async('text').then((source) => {
        const xml = parser.parseFromString(source, 'application/xml');
        const hasPng = wpPptxXmlElements(xml, 'Default').some((entry) => (
          String(entry.getAttribute('Extension') || '').toLowerCase() === 'png'
        ));
        if (hasPng) return false;
        const root = xml.documentElement;
        if (!(root instanceof Element)) return false;
        const defaultEntry = xml.createElementNS(
          root.namespaceURI || 'http://schemas.openxmlformats.org/package/2006/content-types',
          'Default'
        );
        defaultEntry.setAttribute('Extension', 'png');
        defaultEntry.setAttribute('ContentType', 'image/png');
        const firstOverride = Array.from(root.children || []).find((entry) => (
          String(entry.localName || entry.nodeName || '').split(':').pop() === 'Override'
        ));
        root.insertBefore(defaultEntry, firstOverride || null);
        zip.file('[Content_Types].xml', serializer.serializeToString(xml));
        return true;
      });
    }

    function wpPptxNormalizeWingdingsGlyphs(documentXml) {
      if (!(documentXml instanceof XMLDocument)) return 0;
      const drawingNamespace = 'http://schemas.openxmlformats.org/drawingml/2006/main';
      const localNameOf = (node) => String(node && (node.localName || node.nodeName) || '')
        .split(':').pop();
      const directChild = (node, name) => Array.from(node && node.children || [])
        .find((child) => localNameOf(child) === name) || null;
      const isWingdings = (value) => /^wingdings(?:\s*[123])?$/i.test(
        String(value || '').replace(/["']/g, '').trim()
      );
      const setUnicodeTypeface = (properties, fontElementName = 'latin') => {
        if (!(properties instanceof Element)) return;
        const fontNodes = Array.from(properties.children || []).filter((child) => (
          ['latin', 'ea', 'cs', 'sym'].includes(localNameOf(child))
        ));
        if (fontNodes.length) {
          fontNodes.forEach((fontNode) => {
            fontNode.setAttribute('typeface', 'Segoe UI Symbol');
            fontNode.removeAttribute('charset');
          });
          return;
        }
        const prefix = String(properties.prefix || 'a');
        const fontNode = documentXml.createElementNS(
          properties.namespaceURI || drawingNamespace,
          `${prefix}:${fontElementName}`
        );
        fontNode.setAttribute('typeface', 'Segoe UI Symbol');
        properties.appendChild(fontNode);
      };
      let changedCount = 0;

      /* Ký hiệu đầu dòng của PowerPoint thường được lưu là chữ q trong
         Wingdings. Nếu trình duyệt không có/không áp font đó, bộ dựng sẽ lộ
         nguyên chữ q. Đổi ngay trong gói tạm sang ô vuông Unicode, giữ nguyên
         màu, cỡ, khoảng lùi và vị trí bullet của PowerPoint. */
      wpPptxXmlElements(documentXml, 'buChar').forEach((bulletCharacter) => {
        if (String(bulletCharacter.getAttribute('char') || '') !== 'q') return;
        const paragraphProperties = bulletCharacter.parentElement;
        if (!(paragraphProperties instanceof Element)) return;
        let bulletFont = directChild(paragraphProperties, 'buFont');
        const typeface = String(bulletFont && bulletFont.getAttribute('typeface') || '');
        let paragraph = paragraphProperties.parentElement;
        while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentElement;
        const paragraphText = wpPptxXmlElements(paragraph, 't')
          .map((node) => String(node.textContent || '')).join('').replace(/\s+/g, ' ').trim();
        /* Khi buFont được kế thừa từ layout/master, tên font không nằm ngay
           trên slide. Nhãn HĐ/HD là đường dự phòng an toàn cho mẫu người dùng. */
        if (!isWingdings(typeface) && !/^H(?:Đ|D)\s*\d+/i.test(paragraphText)) return;
        bulletCharacter.setAttribute('char', '□');
        if (!(bulletFont instanceof Element)) {
          const prefix = String(paragraphProperties.prefix || 'a');
          bulletFont = documentXml.createElementNS(
            paragraphProperties.namespaceURI || drawingNamespace,
            `${prefix}:buFont`
          );
          paragraphProperties.insertBefore(bulletFont, bulletCharacter);
        }
        bulletFont.setAttribute('typeface', 'Segoe UI Symbol');
        bulletFont.removeAttribute('charset');
        changedCount += 1;
      });

      /* Một số file không dùng bullet mà đặt q thành một run Wingdings riêng.
         Chuẩn hóa cả trường hợp đó nhưng tuyệt đối không đổi chữ q ở font chữ
         thông thường hoặc trong công thức toán. */
      wpPptxXmlElements(documentXml, 'r').forEach((run) => {
        const textNode = directChild(run, 't');
        const sourceText = String(textNode && textNode.textContent || '');
        if (!(textNode instanceof Element) || (!sourceText.includes('q') && !sourceText.includes('\uf0fc'))) return;
        let runProperties = directChild(run, 'rPr');
        let typeface = '';
        if (runProperties instanceof Element) {
          const fontNode = Array.from(runProperties.children || []).find((child) => (
            ['latin', 'ea', 'cs', 'sym'].includes(localNameOf(child))
              && isWingdings(child.getAttribute('typeface'))
          ));
          typeface = String(fontNode && fontNode.getAttribute('typeface') || '');
        }
        if (!typeface) {
          let paragraph = run.parentElement;
          while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentElement;
          const paragraphProperties = directChild(paragraph, 'pPr');
          const defaultRunProperties = directChild(paragraphProperties, 'defRPr');
          const inheritedFont = Array.from(defaultRunProperties && defaultRunProperties.children || [])
            .find((child) => ['latin', 'ea', 'cs', 'sym'].includes(localNameOf(child))
              && isWingdings(child.getAttribute('typeface')));
          typeface = String(inheritedFont && inheritedFont.getAttribute('typeface') || '');
        }
        if (!isWingdings(typeface)) return;
        const normalizedText = String(textNode.textContent || '')
          .replace(/\uf0fc/g, '✓')
          .replace(/q/g, '□');
        if (normalizedText === textNode.textContent) return;
        textNode.textContent = normalizedText;
        if (!(runProperties instanceof Element)) {
          const prefix = String(run.prefix || 'a');
          runProperties = documentXml.createElementNS(
            run.namespaceURI || drawingNamespace,
            `${prefix}:rPr`
          );
          run.insertBefore(runProperties, textNode);
        }
        setUnicodeTypeface(runProperties);
        changedCount += 1;
      });
      return changedCount;
    }

    async function wpPptxReplaceMathTypePreviews(zip, slidePath, documentXml, parser, serializer) {
      const relationshipPath = String(slidePath || '')
        .replace(/^ppt\/slides\//i, 'ppt/slides/_rels/') + '.rels';
      const relationshipFile = zip.file(relationshipPath);
      if (!relationshipFile) return 0;

      const relationshipXml = parser.parseFromString(
        await relationshipFile.async('text'), 'application/xml'
      );
      const relationshipNodes = new Map();
      wpPptxXmlElements(relationshipXml, 'Relationship').forEach((relationship) => {
        const id = String(relationship.getAttribute('Id') || '').trim();
        if (id) relationshipNodes.set(id, relationship);
      });
      const relationships = wpPptxRelationshipMap(relationshipXml);
      const convertedPreviewIds = new Set();
      let convertedCount = 0;

      const pNs = 'http://schemas.openxmlformats.org/presentationml/2006/main';
      const aNs = 'http://schemas.openxmlformats.org/drawingml/2006/main';
      const rNs = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';

      const localNameOf = (node) => String(node && (node.localName || node.nodeName) || '')
        .split(':').pop();

      const directChild = (node, name) => Array.from(node && node.children || [])
        .find((child) => localNameOf(child) === name) || null;

      const liftMathTypePicture = (oleObject, previewRelationshipId) => {
        const graphicFrame = wpPptxAncestorByLocalName(oleObject, 'graphicframe');
        if (!(graphicFrame instanceof Element) || !graphicFrame.parentNode) return false;

        const frameXfrm = wpPptxDirectTransform(graphicFrame);
        const frameBounds = wpPptxTransformValues(frameXfrm);
        if (!frameBounds || !(Number(frameBounds.cx) > 0) || !(Number(frameBounds.cy) > 0)) return false;

        const outerNv = directChild(graphicFrame, 'nvGraphicFramePr');
        const outerCNvPr = outerNv ? directChild(outerNv, 'cNvPr') : null;
        const objectId = String(outerCNvPr && outerCNvPr.getAttribute('id') || '1');
        const objectName = String(outerCNvPr && outerCNvPr.getAttribute('name') || 'MathType Formula');

        const directPicture = documentXml.createElementNS(pNs, 'p:pic');

        const nvPicPr = documentXml.createElementNS(pNs, 'p:nvPicPr');
        const cNvPr = documentXml.createElementNS(pNs, 'p:cNvPr');
        cNvPr.setAttribute('id', objectId);
        cNvPr.setAttribute('name', `${objectName} - MathType PNG`);
        const cNvPicPr = documentXml.createElementNS(pNs, 'p:cNvPicPr');
        const picLocks = documentXml.createElementNS(aNs, 'a:picLocks');
        picLocks.setAttribute('noChangeAspect', '1');
        cNvPicPr.appendChild(picLocks);
        nvPicPr.appendChild(cNvPr);
        nvPicPr.appendChild(cNvPicPr);
        nvPicPr.appendChild(documentXml.createElementNS(pNs, 'p:nvPr'));
        directPicture.appendChild(nvPicPr);

        const blipFill = documentXml.createElementNS(pNs, 'p:blipFill');
        const blip = documentXml.createElementNS(aNs, 'a:blip');
        blip.setAttributeNS(rNs, 'r:embed', previewRelationshipId);
        blipFill.appendChild(blip);
        const stretch = documentXml.createElementNS(aNs, 'a:stretch');
        stretch.appendChild(documentXml.createElementNS(aNs, 'a:fillRect'));
        blipFill.appendChild(stretch);
        directPicture.appendChild(blipFill);

        const spPr = documentXml.createElementNS(pNs, 'p:spPr');
        const xfrm = documentXml.createElementNS(aNs, 'a:xfrm');
        const off = documentXml.createElementNS(aNs, 'a:off');
        off.setAttribute('x', String(Math.round(Number(frameBounds.x) || 0)));
        off.setAttribute('y', String(Math.round(Number(frameBounds.y) || 0)));
        const ext = documentXml.createElementNS(aNs, 'a:ext');
        ext.setAttribute('cx', String(Math.max(1, Math.round(Number(frameBounds.cx) || 1))));
        ext.setAttribute('cy', String(Math.max(1, Math.round(Number(frameBounds.cy) || 1))));
        xfrm.appendChild(off);
        xfrm.appendChild(ext);
        spPr.appendChild(xfrm);

        const geom = documentXml.createElementNS(aNs, 'a:prstGeom');
        geom.setAttribute('prst', 'rect');
        geom.appendChild(documentXml.createElementNS(aNs, 'a:avLst'));
        spPr.appendChild(geom);
        directPicture.appendChild(spPr);

        graphicFrame.parentNode.replaceChild(directPicture, graphicFrame);
        return true;
      };

      /* Chụp danh sách trước vì sau khi chuyển thành p:pic trực tiếp,
         graphicFrame/OLE tương ứng sẽ bị thay khỏi DOM. */
      const oleObjects = wpPptxXmlElements(documentXml, 'oleObj').slice();

      for (const oleObject of oleObjects) {
        if (!(oleObject instanceof Element) || !oleObject.isConnected) continue;

        const objectKind = [
          oleObject.getAttribute('name'),
          oleObject.getAttribute('progId'),
        ].map((value) => String(value || '')).join(' ');
        if (!/(?:MathType|Equation|DSMT)/i.test(objectKind)) continue;

        const previewBlip = wpPptxXmlElements(oleObject, 'blip').find((blip) => (
          !!wpPptxRelationshipId(blip, 'embed')
        ));
        const previewRelationshipId = wpPptxRelationshipId(previewBlip, 'embed');
        const objectRelationshipId = wpPptxRelationshipId(oleObject, 'id');

        if (!previewRelationshipId || convertedPreviewIds.has(previewRelationshipId)) continue;

        const previewRelationship = relationships.get(previewRelationshipId) || null;
        const objectRelationship = relationships.get(objectRelationshipId) || null;
        const previewRelationshipNode = relationshipNodes.get(previewRelationshipId) || null;
        if (!previewRelationship || !previewRelationshipNode
          || /external/i.test(previewRelationship.targetMode)) continue;

        const previewPath = wpPptxPackagePath(slidePath, previewRelationship.target);
        const objectPath = objectRelationship && !/external/i.test(objectRelationship.targetMode)
          ? wpPptxPackagePath(slidePath, objectRelationship.target)
          : '';
        const objectFile = objectPath ? zip.file(objectPath) : null;
        const previewFile = previewPath ? zip.file(previewPath) : null;
        if (!objectFile && !previewFile) continue;

        try {
          const objectBytes = objectFile ? await objectFile.async('uint8array') : null;
          const previewBytes = previewFile ? await previewFile.async('uint8array') : null;

          /* Ưu tiên dữ liệu MathType thật trong OLE. Chỉ dùng preview làm nguồn
             dự phòng; không cho bộ EMF ChemSketch xử lý trước vì Symbol/MT Extra
             có thể bị đổi thành các ký tự kiểu €/# và làm vỡ công thức hóa học. */
          let tex = objectBytes ? cv7991ExtractMathTypeTex({
            data: objectBytes,
            path: objectPath,
            isMathTypeFormula: true,
          }) : '';
          if (!tex && previewBytes) tex = cv7991ExtractMathTypeTex({
            data: previewBytes,
            path: previewPath,
            mimeType: wpPptxMimeType(previewPath),
            isMathTypeFormula: true,
          });
          if (!tex) continue;

          const shape = wpPptxShapeDetailsFromNode(oleObject);
          const bounds = shape && shape.bounds;
          const formula = {
            data: objectBytes || previewBytes,
            path: objectPath || previewPath,
            mimeType: objectBytes
              ? 'application/vnd.openxmlformats-officedocument.oleObject'
              : wpPptxMimeType(previewPath),
            displayWidthPt: bounds && Number(bounds.cx) > 0 ? Number(bounds.cx) / 12700 : 0,
            displayHeightPt: bounds && Number(bounds.cy) > 0 ? Number(bounds.cy) / 12700 : 0,
            isMathTypeFormula: true,
            presenterFormula: true,
            presenterTex: tex,
            presenterMtef: true,
            presenterMathTypeSource: 'pptx-ole-mtef-v6',
          };

          const renderedDataUrl = await cv7991ConvertMathTypeTexForPresenter(formula);
          const pngBytes = wpPptxDataUrlBytes(renderedDataUrl);
          if (!pngBytes.length) continue;

          const slideNumber = (String(slidePath).match(/slide(\d+)\.xml$/i) || [])[1] || '0';
          const shapeId = String(shape && shape.id || convertedCount + 1)
            .replace(/[^A-Za-z0-9_-]/g, '');
          const fileName = `mvip-mathtype-v6-s${slideNumber}-${shapeId || convertedCount + 1}.png`;
          const packagePath = `ppt/media/${fileName}`;
          zip.file(packagePath, pngBytes);

          previewRelationshipNode.setAttribute('Target', `../media/${fileName}`);

          /* Quan trọng: đưa PNG công thức ra thành p:pic trực tiếp.
             Nếu vẫn giữ nó nằm trong OLE graphicFrame thì một số renderer web
             bỏ qua hoặc dựng sai fallback, nhất là MathType hóa học nhiều tầng. */
          liftMathTypePicture(oleObject, previewRelationshipId);

          convertedPreviewIds.add(previewRelationshipId);
          convertedCount += 1;
        } catch (error) {
          console.warn('Không dựng được một công thức MathType OLE trong PowerPoint:', error);
        }
      }

      if (convertedCount) {
        zip.file(relationshipPath, serializer.serializeToString(relationshipXml));
      }
      return convertedCount;
    }

    /* Khoi phuc cac dong a/b/c trong cung mot hop chu co gian dong >= 180%
       va cac hop phuong trinh doc lap xen giua. PowerPoint duoc phep dat
       phuong trinh ben trong nhung khoang trong cua hop chu, nhung HTML
       renderer lai khong bao toan leading 400%, gay de chu.
       Cach lam: tai goi PPTX TAM cho renderer, tach cac doan sau cong thuc
       thanh shape van ban rieng tai vi tri lay tu hinh hoc nguon. Khong
       thay doi tep goc, khong tach group, khong sua shape co animation. */
    function wpPptxRestoreInterleavedEquationParagraphs(documentXml) {
      if (!(documentXml instanceof Document)) return 0;
      const slideTree = wpPptxXmlElements(documentXml, 'spTree')[0];
      if (!(slideTree instanceof Element)) return 0;
      const isLocal = (node, name) => node instanceof Element
        && String(node.localName || node.nodeName || '').split(':').pop() === name;
      const children = (parent, name) => Array.from(parent && parent.children || [])
        .filter((item) => isLocal(item, name));
      const direct = (parent, name) => children(parent, name)[0] || null;
      const readFrame = (shape) => {
        const geometry = direct(shape, 'spPr');
        const xfrm = direct(geometry, 'xfrm');
        const off = direct(xfrm, 'off');
        const ext = direct(xfrm, 'ext');
        if (!off || !ext) return null;
        const frame = {
          x: Number(off.getAttribute('x')), y: Number(off.getAttribute('y')),
          w: Number(ext.getAttribute('cx')), h: Number(ext.getAttribute('cy')),
        };
        return Object.values(frame).every(Number.isFinite) && frame.w > 0 && frame.h > 0
          ? frame : null;
      };
      const shapeId = (shape) => String(direct(direct(shape, 'nvSpPr'), 'cNvPr')?.getAttribute('id') || '');
      const paragraphText = (p) => wpPptxXmlElements(p, 't')
        .map((node) => String(node.textContent || '')).join('').trim();
      const sameSlideShapes = children(slideTree, 'sp'); // Không làm phẳng group.
      if (sameSlideShapes.length < 3) return 0;
      const animatedIds = new Set(wpPptxXmlElements(documentXml, 'spTgt')
        .map((node) => String(node.getAttribute('spid') || '')));
      const allIds = wpPptxXmlElements(documentXml, 'cNvPr')
        .map((node) => Number(node.getAttribute('id'))).filter(Number.isFinite);
      let nextId = Math.max(1, ...allIds) + 1;
      let restored = 0;
      for (const textShape of sameSlideShapes) {
        const sourceId = shapeId(textShape);
        if (!sourceId || animatedIds.has(sourceId)) continue;
        const txBody = direct(textShape, 'txBody');
        const paragraphs = children(txBody, 'p');
        const frame = readFrame(textShape);
        if (!frame || paragraphs.length < 4) continue;
        const largeIndexes = [];
        const textLines = paragraphs.map(paragraphText);
        paragraphs.forEach((paragraph, index) => {
          const pPr = direct(paragraph, 'pPr');
          const percent = direct(direct(pPr, 'lnSpc'), 'spcPct');
          const ratio = Number(percent?.getAttribute('val')) / 100000;
          if (index >= 2 && textLines[index]
            && ratio >= 1.8 && ratio <= 6) largeIndexes.push(index);
        });
        // Chỉ nhận trường hợp có ít nhất hai ý tiếp nối, tránh sửa
        // những văn bản chủ động thiết kế giãn dòng lớn.
        if (largeIndexes.length < 2 || largeIndexes.some((n, i) => i && n !== largeIndexes[i-1] + 1)) continue;
        const overlays = sameSlideShapes.filter((other) => {
          if (other === textShape) return false;
          const otherFrame = readFrame(other);
          if (!otherFrame || !(otherFrame.y > frame.y && otherFrame.y < frame.y + frame.h)) return false;
          if (!(otherFrame.x < frame.x + frame.w && otherFrame.x + otherFrame.w > frame.x)) return false;
          const text = children(direct(other, 'txBody'), 'p').map(paragraphText).join(' ');
          return /[→⇌+＝=]/u.test(text) && text.length >= 12;
        }).sort((a,b) => readFrame(a).y - readFrame(b).y);
        if (overlays.length < largeIndexes.length) continue;
        // Phải giữ được thứ tự equation1 < equation2 < equation3, tránh
        // nhầm hộp công thức vào đúng vị trí văn bản đè phía trên.
        if (overlays.some((overlay, index) => index && readFrame(overlay).y <= readFrame(overlays[index-1]).y)) continue;
        const originalPr = direct(direct(textShape, 'nvSpPr'), 'cNvPr');
        if (!(originalPr instanceof Element)) continue;
        const sourceName = originalPr.getAttribute('name') || 'Text';
        const bodyPr = direct(txBody, 'bodyPr');
        const topInset = bodyPr && bodyPr.hasAttribute('tIns')
          ? Number(bodyPr.getAttribute('tIns')) : 45720; // PPTX: 0.05in
        const margin = Math.max(0, Math.min(914400 * .12, Number.isFinite(topInset) ? topInset : 45720));
        const clones = [];
        for (let i = 0; i < largeIndexes.length; i += 1) {
          const paragraphIndex = largeIndexes[i];
          const equation = readFrame(overlays[i]);
          const following = overlays[i+1] ? readFrame(overlays[i+1]) : null;
          const nextTop = equation.y + equation.h + 914400 * .20;
          const nextContentTop = nextTop + margin;
          if (nextContentTop >= frame.y + frame.h) { clones.length = 0; break; }
          if (following && nextContentTop + 914400 * .32 >= following.y) { clones.length = 0; break; }
          const clone = textShape.cloneNode(true);
          const clonePr = direct(direct(clone, 'nvSpPr'), 'cNvPr');
          const cloneBody = direct(clone, 'txBody');
          if (!clonePr || !cloneBody) { clones.length=0; break; }
          clonePr.setAttribute('id', String(nextId++));
          clonePr.setAttribute('name', `${sourceName} - đoạn ${paragraphIndex+1} (MVIP)`);
          children(cloneBody, 'p').forEach((p, j) => {if (j !== paragraphIndex) p.remove();});
          const singleP = direct(cloneBody, 'p');
          const singlePPr = direct(singleP, 'pPr');
          children(singlePPr, 'lnSpc').forEach((p) => p.remove());
          children(singlePPr, 'spcBef').forEach((p) => p.remove());
          children(singlePPr, 'spcAft').forEach((p) => p.remove());
          const cloneXfrm = direct(direct(clone, 'spPr'), 'xfrm');
          const off = direct(cloneXfrm, 'off');
          const ext = direct(cloneXfrm, 'ext');
          if (!off || !ext) { clones.length = 0; break; }
          off.setAttribute('y', String(Math.round(nextTop)));
          // Một dòng được dựng trong một hộp đủ cao để không kích
          // hoạt co font; vị trí khác để PowerPoint XML quyết định.
          ext.setAttribute('cy', String(Math.round(914400 * .48)));
          clones.push({ paragraphIndex, clone });
        }
        if (clones.length !== largeIndexes.length) continue;
        // Nguyên gốc vẫn giữ các dòng đầu; chỉ tách những đoạn 400%.
        clones.forEach(({paragraphIndex}) => paragraphs[paragraphIndex].remove());
        // Bổ sung ngay SAU shape chữ gốc để vẫn nằm DƯỚI các
        // hộp công thức (giữ thứ tự chồng lớp của PowerPoint).
        let preceding = textShape;
        clones.forEach(({clone}) => {
          slideTree.insertBefore(clone, preceding.nextSibling);
          preceding = clone;
        });
        restored += clones.length;
      }
      return restored;
    }

    function wpPptxPreserveTightTextOverflow(documentXml) {
      /* Một số tiêu đề dùng chữ lớn nhưng giãn dòng cố định rất thấp
         (ví dụ 66 pt / 28 pt). PowerPoint vẫn vẽ phần chữ vượt khỏi dòng.
         Bộ dựng web lại coi spAutoFit thiếu vertOverflow là phải cắt/co chữ.
         Chỉ khai báo phần tràn dọc cho đúng trường hợp này trong bản dựng;
         giữ nguyên font, giãn dòng, tọa độ, kích thước và hiệu ứng nguồn. */
      let changed = 0;
      const namedChildren = (parent, name) => Array.from(parent.children || [])
        .filter((child) => String(child.localName || child.nodeName || '')
          .split(':').pop() === name);
      wpPptxXmlElements(documentXml, 'txBody').forEach((textBody) => {
        const bodyProperties = namedChildren(textBody, 'bodyPr')[0];
        if (!bodyProperties || bodyProperties.hasAttribute('vertOverflow')
          || !namedChildren(bodyProperties, 'spAutoFit').length
          || namedChildren(bodyProperties, 'normAutofit').length
          || namedChildren(bodyProperties, 'noAutofit').length) return;
        const paragraphs = namedChildren(textBody, 'p').filter((paragraph) => (
          wpPptxXmlElements(paragraph, 't').some((node) => (node.textContent || '').trim())
        ));
        if (paragraphs.length !== 1 || wpPptxXmlElements(paragraphs[0], 'br').length) return;
        const paragraph = paragraphs[0];
        const paragraphProperties = namedChildren(paragraph, 'pPr')[0];
        const lineSpacing = paragraphProperties
          && namedChildren(paragraphProperties, 'lnSpc')[0];
        const pointSpacing = lineSpacing && namedChildren(lineSpacing, 'spcPts')[0];
        const lineSize = Number(pointSpacing && pointSpacing.getAttribute('val'));
        const fontSizes = ['rPr', 'defRPr', 'endParaRPr'].flatMap((name) => (
          wpPptxXmlElements(paragraph, name)
            .map((node) => Number(node.getAttribute('sz')))
            .filter((size) => Number.isFinite(size) && size > 0)
        ));
        if (!(lineSize > 0) || !fontSizes.length || lineSize >= Math.max(...fontSizes)) return;
        bodyProperties.setAttribute('vertOverflow', 'overflow');
        changed += 1;
      });
      return changed;
    }


    function wpPptxAncestorByLocalName(node, wantedName) {
      let current = node instanceof Element ? node : null;
      const wanted = String(wantedName || '').toLowerCase();
      while (current) {
        const local = String(current.localName || current.nodeName || '').split(':').pop().toLowerCase();
        if (local === wanted) return current;
        current = current.parentElement;
      }
      return null;
    }


    async function wpPptxPadImageBytes(bytes, widthScale = 1.7, heightScale = 1.6, offsetXRatio = 0.0, offsetYRatio = 0.0) {
      const blob = new Blob([bytes], { type:'image/png' });
      const url = URL.createObjectURL(blob);
      try {
        const image = new Image();
        await new Promise((resolve, reject) => {
          image.onload = resolve;
          image.onerror = () => reject(new Error('Không nạp được ảnh PNG sau chuyển EMF.'));
          image.src = url;
        });
        const srcW = Math.max(1, image.naturalWidth || image.width || 1);
        const srcH = Math.max(1, image.naturalHeight || image.height || 1);
        const outW = Math.max(srcW + 8, Math.round(srcW * Math.max(1, Number(widthScale) || 1)));
        const outH = Math.max(srcH + 8, Math.round(srcH * Math.max(1, Number(heightScale) || 1)));
        const canvas = document.createElement('canvas');
        canvas.width = outW;
        canvas.height = outH;
        const ctx = canvas.getContext('2d', { alpha:true });
        if (!ctx) throw new Error('Không tạo được canvas để đệm ảnh EMF.');
        ctx.clearRect(0, 0, outW, outH);
        const dx = Math.round((outW - srcW) / 2 + (offsetXRatio || 0) * outW);
        const dy = Math.round((outH - srcH) / 2 + (offsetYRatio || 0) * outH);
        ctx.drawImage(image, dx, dy, srcW, srcH);
        const outBlob = await new Promise((resolve, reject) => {
          canvas.toBlob((b) => b ? resolve(b) : reject(new Error('Không xuất được PNG đã thêm đệm.')), 'image/png');
        });
        return new Uint8Array(await outBlob.arrayBuffer());
      } finally {
        URL.revokeObjectURL(url);
      }
    }

    async function wpPptxEmfBytesToPng(bytes, widthPx, heightPx) {
      const data = bytes instanceof Uint8Array ? bytes : new Uint8Array(bytes || 0);
      if (!data.length) throw new Error('Ảnh EMF không có dữ liệu.');

      /* Dùng đúng pipeline EMF đã hoạt động ổn định ở viewer Word.
         Pipeline này đọc metafile -> SVG -> tighten theo phần mực thật -> PNG. */
      const imageItem = {
        data,
        path: 'ppt/media/chem-object.emf',
        name: 'chem-object.emf',
        fileName: 'chem-object.emf',
        displayWidthPt: Math.max(1, Number(widthPx) || 160) * 72 / 96,
        displayHeightPt: Math.max(1, Number(heightPx) || 90) * 72 / 96,
        widthPt: Math.max(1, Number(widthPx) || 160) * 72 / 96,
        heightPt: Math.max(1, Number(heightPx) || 90) * 72 / 96,
      };

      const dataUrl = await cv7991ConvertLegacyPresenterImage(imageItem);
      if (!dataUrl) throw new Error('Bộ chuyển EMF không tạo được ảnh.');

      let pngBytes = wpPptxDataUrlBytes(dataUrl);
      if (pngBytes && pngBytes.length > 100 && /^data:image\/png/i.test(String(dataUrl))) {
        /* Với ChemSketch/EMF, ảnh sau khi siết khung quá chặt sẽ bị phóng to quá mức
           khi đặt lại vào khung OLE gốc, làm OH/NH2 trông lệch và cồng kềnh.
           Thêm đệm trong suốt để giữ tỉ lệ hiển thị tự nhiên hơn. */
        pngBytes = await wpPptxPadImageBytes(pngBytes, 1.75, 1.60, 0.00, 0.00);
        return pngBytes;
      }

      /* Hiếm khi pipeline trả SVG data URL; raster thêm một lần sang PNG. */
      if (/^data:image\/svg\+xml/i.test(String(dataUrl))) {
        const response = await fetch(dataUrl);
        const svgText = await response.text();
        const svgBlob = new Blob([svgText], { type:'image/svg+xml;charset=utf-8' });
        const svgUrl = URL.createObjectURL(svgBlob);
        try {
          const image = new Image();
          await new Promise((resolve, reject) => {
            image.onload = resolve;
            image.onerror = () => reject(new Error('Không nạp được SVG ChemSketch.'));
            image.src = svgUrl;
          });
          const width = Math.max(64, Math.round((Number(widthPx) || 160) * 3));
          const height = Math.max(48, Math.round((Number(heightPx) || 90) * 3));
          const canvas = document.createElement('canvas');
          canvas.width = width;
          canvas.height = height;
          const ctx = canvas.getContext('2d', { alpha:true });
          if (!ctx) throw new Error('Không tạo được canvas ChemSketch.');
          ctx.clearRect(0, 0, width, height);
          ctx.drawImage(image, 0, 0, width, height);
          const blob = await new Promise((resolve, reject) => {
            canvas.toBlob((result) => result ? resolve(result) : reject(new Error('Không raster được ChemSketch SVG.')), 'image/png');
          });
          return await wpPptxPadImageBytes(new Uint8Array(await blob.arrayBuffer()), 1.75, 1.60, 0.00, 0.00);
        } finally {
          URL.revokeObjectURL(svgUrl);
        }
      }

      /* Nếu là một data URL ảnh khác, trình duyệt giải mã rồi raster sang PNG. */
      if (/^data:image\//i.test(String(dataUrl))) {
        const image = new Image();
        await new Promise((resolve, reject) => {
          image.onload = resolve;
          image.onerror = () => reject(new Error('Không nạp được ảnh EMF đã chuyển đổi.'));
          image.src = dataUrl;
        });
        const width = Math.max(64, Math.round((Number(widthPx) || image.naturalWidth || 160) * 3));
        const height = Math.max(48, Math.round((Number(heightPx) || image.naturalHeight || 90) * 3));
        const canvas = document.createElement('canvas');
        canvas.width = width;
        canvas.height = height;
        const ctx = canvas.getContext('2d', { alpha:true });
        if (!ctx) throw new Error('Không tạo được canvas cho ảnh EMF.');
        ctx.clearRect(0, 0, width, height);
        ctx.drawImage(image, 0, 0, width, height);
        const blob = await new Promise((resolve, reject) => {
          canvas.toBlob((result) => result ? resolve(result) : reject(new Error('Không tạo được PNG từ ảnh EMF.')), 'image/png');
        });
        return await wpPptxPadImageBytes(new Uint8Array(await blob.arrayBuffer()), 1.75, 1.60, 0.00, 0.00);
      }

      throw new Error('Định dạng ảnh sau chuyển EMF không được hỗ trợ.');
    }

    async function wpPptxReplaceEmfPicturesWithPng(zip, slidePath, documentXml, parser, serializer) {
      if (!zip || !(documentXml instanceof XMLDocument)) return 0;
      const relationshipPath = String(slidePath || '')
        .replace(/^ppt\/slides\//i, 'ppt/slides/_rels/') + '.rels';
      const relationshipFile = zip.file(relationshipPath);
      if (!relationshipFile) return 0;

      const relationshipXml = parser.parseFromString(
        await relationshipFile.async('text'), 'application/xml'
      );
      const relationshipElements = wpPptxXmlElements(relationshipXml, 'Relationship');
      const relationshipById = new Map(relationshipElements.map((entry) => [
        String(entry.getAttribute('Id') || '').trim(), entry
      ]));
      let converted = 0;

      const blips = wpPptxXmlElements(documentXml, 'blip');
      for (const blip of blips) {
        const rid = wpPptxRelationshipId(blip, 'embed');
        if (!rid) continue;
        const relationship = relationshipById.get(rid);
        if (!(relationship instanceof Element)) continue;

        const target = String(relationship.getAttribute('Target') || '').trim();
        const packagePath = wpPptxPackagePath(slidePath, target);
        if (!/\.emf$/i.test(packagePath)) continue;

        const mediaFile = zip.file(packagePath);
        if (!mediaFile) continue;

        /* Chỉ thay p:pic xem trước. OLE object đi kèm vẫn giữ nguyên dữ liệu gốc. */
        const picture = wpPptxAncestorByLocalName(blip, 'pic');
        if (!(picture instanceof Element)) continue;
        const bounds = wpPptxShapeBounds(picture);
        const widthPx = bounds && bounds.cx > 0 ? bounds.cx / 9525 : 180;
        const heightPx = bounds && bounds.cy > 0 ? bounds.cy / 9525 : 100;

        try {
          const emfBytes = await mediaFile.async('uint8array');
          const pngBytes = await wpPptxEmfBytesToPng(emfBytes, widthPx, heightPx);
          if (!pngBytes || pngBytes.length < 100) continue;

          const slideNoMatch = String(slidePath || '').match(/slide(\d+)\.xml$/i);
          const slideNo = slideNoMatch ? slideNoMatch[1] : '0';
          const safeRid = rid.replace(/[^A-Za-z0-9_-]+/g, '_');
          const pngName = `cv7991_slide${slideNo}_${safeRid}_emf.png`;
          const pngPath = `ppt/media/${pngName}`;
          zip.file(pngPath, pngBytes);

          relationship.setAttribute('Target', `../media/${pngName}`);

          /* Ảnh ChemSketch trong file mẫu không phải p:pic trực tiếp mà nằm trong:
             p:graphicFrame -> p:oleObj -> mc:Fallback -> p:pic.
             Nhiều renderer web bỏ qua toàn bộ OLE graphicFrame, nên dù đổi relationship
             sang PNG thì vẫn không hiện. Đưa bản p:pic fallback ra trực tiếp spTree. */
          const graphicFrame = wpPptxAncestorByLocalName(picture, 'graphicframe');
          if (graphicFrame && graphicFrame.parentNode) {
            const pNs = 'http://schemas.openxmlformats.org/presentationml/2006/main';
            const aNs = 'http://schemas.openxmlformats.org/drawingml/2006/main';
            const rNs = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';

            const outerNv = wpPptxXmlElements(graphicFrame, 'cNvPr')[0] || null;
            const frameXfrm = wpPptxDirectTransform(graphicFrame);
            const frameBounds = wpPptxTransformValues(frameXfrm) || bounds;

            const directPicture = documentXml.createElementNS(pNs, 'p:pic');

            const nvPicPr = documentXml.createElementNS(pNs, 'p:nvPicPr');
            const cNvPr = documentXml.createElementNS(pNs, 'p:cNvPr');
            cNvPr.setAttribute('id', String(outerNv && outerNv.getAttribute('id') || '1'));
            cNvPr.setAttribute(
              'name',
              String(outerNv && outerNv.getAttribute('name') || 'ChemSketch Picture').replace(/^Object/i, 'Picture')
            );
            const cNvPicPr = documentXml.createElementNS(pNs, 'p:cNvPicPr');
            const picLocks = documentXml.createElementNS(aNs, 'a:picLocks');
            picLocks.setAttribute('noChangeAspect', '1');
            cNvPicPr.appendChild(picLocks);
            const nvPr = documentXml.createElementNS(pNs, 'p:nvPr');
            nvPicPr.appendChild(cNvPr);
            nvPicPr.appendChild(cNvPicPr);
            nvPicPr.appendChild(nvPr);
            directPicture.appendChild(nvPicPr);

            const blipFill = documentXml.createElementNS(pNs, 'p:blipFill');
            const newBlip = documentXml.createElementNS(aNs, 'a:blip');
            newBlip.setAttributeNS(rNs, 'r:embed', rid);
            blipFill.appendChild(newBlip);
            const stretch = documentXml.createElementNS(aNs, 'a:stretch');
            stretch.appendChild(documentXml.createElementNS(aNs, 'a:fillRect'));
            blipFill.appendChild(stretch);
            directPicture.appendChild(blipFill);

            const spPr = documentXml.createElementNS(pNs, 'p:spPr');
            const xfrm = documentXml.createElementNS(aNs, 'a:xfrm');
            const off = documentXml.createElementNS(aNs, 'a:off');
            off.setAttribute('x', String(Math.round(Number(frameBounds.x) || 0)));
            off.setAttribute('y', String(Math.round(Number(frameBounds.y) || 0)));
            const ext = documentXml.createElementNS(aNs, 'a:ext');
            ext.setAttribute('cx', String(Math.max(1, Math.round(Number(frameBounds.cx) || 1))));
            ext.setAttribute('cy', String(Math.max(1, Math.round(Number(frameBounds.cy) || 1))));
            xfrm.appendChild(off);
            xfrm.appendChild(ext);
            spPr.appendChild(xfrm);

            const geom = documentXml.createElementNS(aNs, 'a:prstGeom');
            geom.setAttribute('prst', 'rect');
            geom.appendChild(documentXml.createElementNS(aNs, 'a:avLst'));
            spPr.appendChild(geom);
            directPicture.appendChild(spPr);

            graphicFrame.parentNode.replaceChild(directPicture, graphicFrame);
          }

          converted += 1;
        } catch (error) {
          console.warn('Không chuyển được một ảnh EMF PowerPoint sang PNG:', packagePath, error);
        }
      }

      if (converted > 0) {
        zip.file(relationshipPath, serializer.serializeToString(relationshipXml));
      }
      return converted;
    }


    async function wpPptxReplaceOrbitalBoxTables(zip, slidePath, documentXml, parser, serializer) {
      if (!zip || !(documentXml instanceof XMLDocument)) return 0;

      const pNs = 'http://schemas.openxmlformats.org/presentationml/2006/main';
      const aNs = 'http://schemas.openxmlformats.org/drawingml/2006/main';
      const rNs = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';
      const relNs = 'http://schemas.openxmlformats.org/package/2006/relationships';
      const localNameOf = (node) => String(node && (node.localName || node.nodeName) || '')
        .split(':').pop();

      const directChild = (node, name) => Array.from(node && node.children || [])
        .find((child) => localNameOf(child) === name) || null;

      const numericAttr = (node, name) => {
        const value = Number(node && node.getAttribute(name));
        return Number.isFinite(value) ? value : 0;
      };

      const orbitalCapacities = [7, 5, 3, 1];

      const isValidOrbitalGroup = (values) => {
        if (!Array.isArray(values) || !orbitalCapacities.includes(values.length)) return false;
        let seenSingle = false;
        let seenEmpty = false;
        let hasElectron = false;
        for (const rawValue of values) {
          const value = String(rawValue || '').replace(/\s+/g, '').trim();
          if (!value) {
            seenEmpty = true;
            continue;
          }
          if (seenEmpty) return false;
          if (!/^(?:↑|↓|↑↓|↓↑)+$/u.test(value)) return false;
          hasElectron = true;
          if (value === '↑↓' || value === '↓↑') {
            if (seenSingle) return false;
            continue;
          }
          if (value === '↑') {
            seenSingle = true;
            continue;
          }
          return false;
        }
        return hasElectron;
      };

      const parseOrbitalSegments = (texts) => {
        const memo = new Map();
        const solve = (index) => {
          if (index === texts.length) return [];
          if (memo.has(index)) return memo.get(index);
          let answer = null;
          for (const size of orbitalCapacities) {
            if (index + size > texts.length) continue;
            const groupValues = texts.slice(index, index + size);
            if (!isValidOrbitalGroup(groupValues)) continue;
            if (index + size === texts.length) {
              answer = [{ kind:'group', size }];
              break;
            }
            const gapValue = String(texts[index + size] || '').replace(/\s+/g, '').trim();
            if (gapValue) continue;
            const rest = solve(index + size + 1);
            if (!rest) continue;
            answer = [{ kind:'group', size }, { kind:'gap', size:1 }, ...rest];
            break;
          }
          memo.set(index, answer);
          return answer;
        };
        return solve(0);
      };

      const relationshipPath = String(slidePath || '')
        .replace(/^ppt\/slides\//i, 'ppt/slides/_rels/') + '.rels';
      let relationshipXml = null;
      const relationshipFile = zip.file(relationshipPath);
      if (relationshipFile) {
        relationshipXml = parser.parseFromString(
          await relationshipFile.async('text'), 'application/xml'
        );
      } else {
        relationshipXml = parser.parseFromString(
          `<Relationships xmlns="${relNs}"></Relationships>`,
          'application/xml'
        );
      }
      const relationshipRoot = relationshipXml.documentElement;
      const existingRelationships = wpPptxXmlElements(relationshipXml, 'Relationship');
      let nextRidNo = Math.max(
        1,
        ...existingRelationships.map((node) => {
          const match = String(node.getAttribute('Id') || '').match(/^rId(\d+)$/i);
          return match ? Number(match[1]) + 1 : 1;
        })
      );

      const ensurePngContentType = async () => {
        const path = '[Content_Types].xml';
        const file = zip.file(path);
        if (!file) return;
        const xml = parser.parseFromString(await file.async('text'), 'application/xml');
        const defaults = wpPptxXmlElements(xml, 'Default');
        if (defaults.some((node) => String(node.getAttribute('Extension') || '').toLowerCase() === 'png')) return;
        const root = xml.documentElement;
        const node = xml.createElementNS(
          'http://schemas.openxmlformats.org/package/2006/content-types', 'Default'
        );
        node.setAttribute('Extension', 'png');
        node.setAttribute('ContentType', 'image/png');
        root.appendChild(node);
        zip.file(path, serializer.serializeToString(xml));
      };

      const drawArrow = (ctx, x, direction, cellWidth, cellHeight) => {
        const shaft = Math.max(1.5, Math.min(2.3, cellHeight * 0.025));
        const head = Math.max(5.5, Math.min(9.5, cellWidth * 0.10));
        const top = cellHeight * 0.27;
        const bottom = cellHeight * 0.73;
        ctx.save();
        ctx.strokeStyle = '#000';
        ctx.lineWidth = shaft;
        ctx.lineCap = 'round';
        ctx.lineJoin = 'round';
        ctx.beginPath();
        if (direction === 'up') {
          ctx.moveTo(x, bottom);
          ctx.lineTo(x, top);
          ctx.stroke();
          ctx.beginPath();
          ctx.moveTo(x, top);
          ctx.lineTo(x - head * 0.62, top + head);
          ctx.moveTo(x, top);
          ctx.lineTo(x + head * 0.62, top + head);
          ctx.stroke();
        } else {
          ctx.moveTo(x, top);
          ctx.lineTo(x, bottom);
          ctx.stroke();
          ctx.beginPath();
          ctx.moveTo(x, bottom);
          ctx.lineTo(x - head * 0.62, bottom - head);
          ctx.moveTo(x, bottom);
          ctx.lineTo(x + head * 0.62, bottom - head);
          ctx.stroke();
        }
        ctx.restore();
      };

      const orbitalPng = async (renderedWidths, cy, cellTexts, segments) => {
        const widthPx = Math.max(4, renderedWidths.reduce((sum, value) => sum + value, 0) / 9525);
        const heightPx = Math.max(4, cy / 9525);
        const scale = widthPx > 1500 ? 2 : 3;
        const canvas = document.createElement('canvas');
        canvas.width = Math.max(16, Math.round(widthPx * scale));
        canvas.height = Math.max(16, Math.round(heightPx * scale));
        const ctx = canvas.getContext('2d', { alpha:true });
        if (!ctx) return null;
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        ctx.scale(scale, scale);

        const widthsPx = renderedWidths.map((value) => value / 9525);
        const starts = [];
        let cursor = 0;
        widthsPx.forEach((width) => {
          starts.push(cursor);
          cursor += width;
        });

        const borderWidth = Math.max(1.0, Math.min(1.5, heightPx * 0.017));
        ctx.strokeStyle = '#000';
        ctx.lineWidth = borderWidth;
        ctx.lineCap = 'butt';
        ctx.lineJoin = 'miter';

        let cellIndex = 0;
        segments.forEach((segment) => {
          if (segment.kind === 'gap') {
            cellIndex += segment.size;
            return;
          }
          const startIndex = cellIndex;
          const endIndex = cellIndex + segment.size - 1;
          const x = starts[startIndex];
          const w = widthsPx.slice(startIndex, endIndex + 1).reduce((sum, value) => sum + value, 0);
          const inset = borderWidth * 0.55 + 0.20;

          ctx.strokeRect(
            x + inset,
            inset,
            Math.max(1, w - inset * 2),
            Math.max(1, heightPx - inset * 2)
          );

          let dividerX = x;
          for (let i = startIndex; i < endIndex; i += 1) {
            dividerX += widthsPx[i];
            ctx.beginPath();
            ctx.moveTo(dividerX, inset);
            ctx.lineTo(dividerX, heightPx - inset);
            ctx.stroke();
          }

          for (let i = startIndex; i <= endIndex; i += 1) {
            const value = String(cellTexts[i] || '').replace(/\s+/g, '').trim();
            if (!value) continue;
            const cellX = starts[i];
            const cellW = widthsPx[i];
            if (value === '↑↓' || value === '↓↑') {
              drawArrow(ctx, cellX + cellW * 0.42, 'up', cellW, heightPx);
              drawArrow(ctx, cellX + cellW * 0.60, 'down', cellW, heightPx);
            } else if (value === '↑') {
              drawArrow(ctx, cellX + cellW * 0.50, 'up', cellW, heightPx);
            } else if (value === '↓') {
              drawArrow(ctx, cellX + cellW * 0.50, 'down', cellW, heightPx);
            }
          }
          cellIndex += segment.size;
        });

        const blob = await new Promise((resolve) => {
          canvas.toBlob((result) => resolve(result), 'image/png');
        });
        if (!blob) return null;
        return new Uint8Array(await blob.arrayBuffer());
      };

      const makePicture = (rid, name, x, y, cx, cy, objectId) => {
        const pic = documentXml.createElementNS(pNs, 'p:pic');

        const nvPicPr = documentXml.createElementNS(pNs, 'p:nvPicPr');
        const cNvPr = documentXml.createElementNS(pNs, 'p:cNvPr');
        cNvPr.setAttribute('id', objectId);
        cNvPr.setAttribute('name', `${name} - fixed orbital`);
        const cNvPicPr = documentXml.createElementNS(pNs, 'p:cNvPicPr');
        const locks = documentXml.createElementNS(aNs, 'a:picLocks');
        locks.setAttribute('noChangeAspect', '1');
        cNvPicPr.appendChild(locks);
        nvPicPr.appendChild(cNvPr);
        nvPicPr.appendChild(cNvPicPr);
        nvPicPr.appendChild(documentXml.createElementNS(pNs, 'p:nvPr'));
        pic.appendChild(nvPicPr);

        const blipFill = documentXml.createElementNS(pNs, 'p:blipFill');
        const blip = documentXml.createElementNS(aNs, 'a:blip');
        blip.setAttributeNS(rNs, 'r:embed', rid);
        blipFill.appendChild(blip);
        const stretch = documentXml.createElementNS(aNs, 'a:stretch');
        stretch.appendChild(documentXml.createElementNS(aNs, 'a:fillRect'));
        blipFill.appendChild(stretch);
        pic.appendChild(blipFill);

        const spPr = documentXml.createElementNS(pNs, 'p:spPr');
        const xfrm = documentXml.createElementNS(aNs, 'a:xfrm');
        const off = documentXml.createElementNS(aNs, 'a:off');
        off.setAttribute('x', String(Math.round(x)));
        off.setAttribute('y', String(Math.round(y)));
        const ext = documentXml.createElementNS(aNs, 'a:ext');
        ext.setAttribute('cx', String(Math.round(cx)));
        ext.setAttribute('cy', String(Math.round(cy)));
        xfrm.appendChild(off);
        xfrm.appendChild(ext);
        spPr.appendChild(xfrm);
        const geom = documentXml.createElementNS(aNs, 'a:prstGeom');
        geom.setAttribute('prst', 'rect');
        geom.appendChild(documentXml.createElementNS(aNs, 'a:avLst'));
        spPr.appendChild(geom);
        pic.appendChild(spPr);
        return pic;
      };

      let converted = 0;
      const slideNoMatch = String(slidePath || '').match(/slide(\d+)\.xml$/i);
      const slideNo = slideNoMatch ? slideNoMatch[1] : '0';

      const frames = wpPptxXmlElements(documentXml, 'graphicFrame').slice();
      for (const frame of frames) {
        if (!(frame instanceof Element) || !frame.parentNode) continue;

        const table = wpPptxXmlElements(frame, 'tbl')[0];
        if (!(table instanceof Element)) continue;

        const rows = Array.from(table.children || []).filter((node) => localNameOf(node) === 'tr');
        if (rows.length !== 1) continue;

        const cells = Array.from(rows[0].children || []).filter((node) => localNameOf(node) === 'tc');
        const count = cells.length;
        if (!(count >= 1 && count <= 21)) continue;

        const cellTexts = cells.map((cell) => (
          wpPptxXmlElements(cell, 't')
            .map((node) => String(node.textContent || ''))
            .join('')
            .replace(/\s+/g, '')
            .trim()
        ));
        if (!cellTexts.every((text) => !text || /^(?:↑|↓|↑↓|↓↑)+$/u.test(text))) continue;

        const segments = parseOrbitalSegments(cellTexts);
        if (!segments || !segments.length) continue;

        const grid = wpPptxXmlElements(table, 'gridCol')
          .map((node) => numericAttr(node, 'w'))
          .filter((value) => value > 0);
        if (grid.length !== count) continue;

        const frameXfrm = directChild(frame, 'xfrm') || wpPptxXmlElements(frame, 'xfrm')[0];
        if (!(frameXfrm instanceof Element)) continue;
        const offNode = directChild(frameXfrm, 'off') || wpPptxXmlElements(frameXfrm, 'off')[0];
        const extNode = directChild(frameXfrm, 'ext') || wpPptxXmlElements(frameXfrm, 'ext')[0];
        if (!(offNode instanceof Element) || !(extNode instanceof Element)) continue;

        const x = numericAttr(offNode, 'x');
        const y = numericAttr(offNode, 'y');
        const cx = numericAttr(extNode, 'cx');
        const cy = numericAttr(extNode, 'cy');
        if (!(cx > 0 && cy > 0)) continue;

        const gridTotal = grid.reduce((sum, value) => sum + value, 0);
        if (!(gridTotal > 0)) continue;
        const renderedWidths = grid.map((value) => cx * value / gridTotal);

        const boxWidths = [];
        let boxCursor = 0;
        segments.forEach((segment) => {
          if (segment.kind === 'gap') {
            boxCursor += segment.size;
            return;
          }
          for (let i = 0; i < segment.size; i += 1) boxWidths.push(renderedWidths[boxCursor + i]);
          boxCursor += segment.size;
        });
        if (!boxWidths.length || !boxWidths.every((width) => {
          const ratio = width / cy;
          return ratio >= 0.55 && ratio <= 1.55;
        })) continue;

        const originalNv = directChild(frame, 'nvGraphicFramePr');
        const originalCNvPr = originalNv
          ? directChild(originalNv, 'cNvPr')
          : wpPptxXmlElements(frame, 'cNvPr')[0];
        const objectId = String(originalCNvPr && originalCNvPr.getAttribute('id') || (5000 + converted));
        const objectName = String(originalCNvPr && originalCNvPr.getAttribute('name') || `Orbital ${objectId}`);

        const pngBytes = await orbitalPng(renderedWidths, cy, cellTexts, segments);
        if (!pngBytes || pngBytes.length < 50) continue;

        let suffix = converted + 1;
        let pngName = `cv7991_orbital_slide${slideNo}_${suffix}.png`;
        while (zip.file(`ppt/media/${pngName}`)) {
          suffix += 1;
          pngName = `cv7991_orbital_slide${slideNo}_${suffix}.png`;
        }
        zip.file(`ppt/media/${pngName}`, pngBytes);

        const rid = `rId${nextRidNo++}`;
        const rel = relationshipXml.createElementNS(relNs, 'Relationship');
        rel.setAttribute('Id', rid);
        rel.setAttribute(
          'Type',
          'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image'
        );
        rel.setAttribute('Target', `../media/${pngName}`);
        relationshipRoot.appendChild(rel);

        frame.parentNode.replaceChild(
          makePicture(rid, objectName, x, y, cx, cy, objectId),
          frame
        );
        converted += 1;
      }

      if (converted > 0) {
        await ensurePngContentType();
        zip.file(relationshipPath, serializer.serializeToString(relationshipXml));
      }
      return converted;
    }

    /* 2026-10-14: Căn bảng PowerPoint bằng các lớp ảnh phủ TOÀN KHUNG,
       tọa độ chữ theo HÀNG và CỘT gốc thay vì tọa độ ảnh một hàng. */
    /* 2026-10-13: PowerPoint đôi khi đặt chữ của một hàng bảng trong MỘT
       TextBox, căn bốn ô bằng nhiều dấu cách. Trình duyệt co khoảng trắng,
       khiến 1s/2s,2p... lệch ô. Nếu nhận diện đủ bảng 5 cột/5 hàng và bốn
       textbox phủ những ô trống, dựng bảng nền và TỪNG HÀNG chữ thành ảnh
       riêng nhưng giữ nguyên shape id để các hiệu ứng PPT vẫn hoạt động.
       Ảnh/nhãn/nội dung do người dùng sửa đều đọc từ PPTX, không sửa PPTX gốc. */
    async function wpPptxFixOverlayTextTables(zip, slidePath, xml, parser, serializer) {
      if (!zip || !(xml instanceof XMLDocument)) return 0;
      const pNs = 'http://schemas.openxmlformats.org/presentationml/2006/main';
      const aNs = 'http://schemas.openxmlformats.org/drawingml/2006/main';
      const rNs = 'http://schemas.openxmlformats.org/officeDocument/2006/relationships';
      const relNs = 'http://schemas.openxmlformats.org/package/2006/relationships';
      const local = (n) => String(n && (n.localName || n.nodeName) || '').split(':').pop();
      const child = (el, name) => Array.from(el && el.children || []).find((node) => local(node) === name) || null;
      const number = (node, attr) => Number(node && node.getAttribute(attr)) || 0;
      const transform = (el, ownProperty) => {
        const prop = ownProperty ? child(el, ownProperty) : el;
        const trans = child(prop, 'xfrm');
        const off = child(trans, 'off');
        const ext = child(trans, 'ext');
        if (!off || !ext) return null;
        return { x:number(off, 'x'), y:number(off, 'y'),
          cx:number(ext, 'cx'), cy:number(ext, 'cy') };
      };
      const shapeText = (el) => wpPptxXmlElements(el, 't').map((node) => String(node.textContent || '')).join('');
      const rows = (el) => Array.from(el && el.children || []).filter((n) => local(n) === 'tr');
      const cells = (el) => Array.from(el && el.children || []).filter((n) => local(n) === 'tc');
      const cellsText = (r) => cells(r).map((tc) => shapeText(tc).trim());
      const slideShapes = wpPptxXmlElements(xml, 'sp').filter((el) => (
        !!child(el, 'spPr') && !!child(el, 'txBody') && !!child(el, 'nvSpPr')
      ));
      const frames = wpPptxXmlElements(xml, 'graphicFrame').slice();
      const relPath = String(slidePath).replace(/^ppt\/slides\//, 'ppt/slides/_rels/') + '.rels';
      const relFile = zip.file(relPath);
      if (!relFile) return 0;
      const relXml = parser.parseFromString(await relFile.async('text'), 'application/xml');
      const relRoot = relXml.documentElement;
      let ridNumber = Math.max(1, ...wpPptxXmlElements(relXml, 'Relationship').map((rel) => {
        const match = String(rel.getAttribute('Id') || '').match(/^rId(\d+)$/);
        return match ? Number(match[1]) + 1 : 1;
      }));
      const scale = 3;
      const newCanvas = (w, h) => {
        const canvas = document.createElement('canvas');
        canvas.width = Math.max(2, Math.ceil(w * scale));
        canvas.height = Math.max(2, Math.ceil(h * scale));
        const ctx = canvas.getContext('2d', { alpha:true });
        if (!ctx) return null;
        ctx.scale(scale, scale);
        return { canvas, ctx };
      };
      const toPng = async (canvas) => {
        const blob = await new Promise((resolve) => canvas.toBlob(resolve, 'image/png'));
        return blob ? new Uint8Array(await blob.arrayBuffer()) : null;
      };
      const makePicture = (id, name, rid, bounds) => {
        const pic = xml.createElementNS(pNs, 'p:pic');
        const nv = xml.createElementNS(pNs, 'p:nvPicPr');
        const info = xml.createElementNS(pNs, 'p:cNvPr');
        info.setAttribute('id', String(id));
        info.setAttribute('name', String(name || 'MVIP aligned table'));
        nv.appendChild(info);
        const picPr = xml.createElementNS(pNs, 'p:cNvPicPr');
        const lock = xml.createElementNS(aNs, 'a:picLocks');
        lock.setAttribute('noChangeAspect', '1');
        picPr.appendChild(lock);
        nv.appendChild(picPr);
        nv.appendChild(xml.createElementNS(pNs, 'p:nvPr'));
        pic.appendChild(nv);
        const blipFill = xml.createElementNS(pNs, 'p:blipFill');
        const blip = xml.createElementNS(aNs, 'a:blip');
        blip.setAttributeNS(rNs, 'r:embed', rid);
        blipFill.appendChild(blip);
        const stretch = xml.createElementNS(aNs, 'a:stretch');
        stretch.appendChild(xml.createElementNS(aNs, 'a:fillRect'));
        blipFill.appendChild(stretch);
        pic.appendChild(blipFill);
        const spPr = xml.createElementNS(pNs, 'p:spPr');
        const xfrm = xml.createElementNS(aNs, 'a:xfrm');
        const off = xml.createElementNS(aNs, 'a:off');
        off.setAttribute('x', String(Math.round(bounds.x)));
        off.setAttribute('y', String(Math.round(bounds.y)));
        const ext = xml.createElementNS(aNs, 'a:ext');
        ext.setAttribute('cx', String(Math.round(bounds.cx)));
        ext.setAttribute('cy', String(Math.round(bounds.cy)));
        xfrm.appendChild(off); xfrm.appendChild(ext);
        spPr.appendChild(xfrm);
        const geom = xml.createElementNS(aNs, 'a:prstGeom');
        geom.setAttribute('prst', 'rect');
        geom.appendChild(xml.createElementNS(aNs, 'a:avLst'));
        spPr.appendChild(geom);
        pic.appendChild(spPr);
        return pic;
      };
      const slideNo = (String(slidePath).match(/slide(\d+)\.xml$/) || [0, '0'])[1];
      let converted = 0;
      for (const frame of frames) {
        const table = wpPptxXmlElements(frame, 'tbl')[0];
        if (!table || !frame.parentNode) continue;
        const tableRows = rows(table);
        if (tableRows.length !== 5 || !tableRows.every((r) => cells(r).length === 5)) continue;
        const texts = tableRows.map(cellsText);
        // Chỉ phục hồi bảng có 4 hàng dữ liệu được vẽ bằng TextBox riêng,
        // tuyệt đối không thay các bảng PowerPoint bình thường.
        if (texts[0].join('|') !== 'n|1|2|3|4') continue;
        const labels = texts.slice(1).map((r) => r[0].replace(/\s+/g, ' ').normalize('NFC'));
        if (!/^K[íi] hiệu$/i.test(labels[0]) || labels[1] !== 'Phân lớp'
          || labels[2] !== 'Số AO' || labels[3] !== 'Số e tối đa') continue;
        if (!texts.slice(1).every((r) => r.slice(1).every((s) => !s))) continue;
        const widthsEmu = wpPptxXmlElements(table, 'gridCol').map((e) => number(e, 'w'));
        const heightsEmu = tableRows.map((r) => number(r, 'h'));
        const rect = transform(frame, null);
        if (!rect || widthsEmu.length !== 5 || !widthsEmu.every((n) => n > 0)
          || !heightsEmu.every((n) => n > 0) || rect.cx <= 0 || rect.cy <= 0) continue;
        const widthTotal = widthsEmu.reduce((a, b) => a + b, 0);
        const heightTotal = heightsEmu.reduce((a, b) => a + b, 0);
        const wEmu = widthsEmu.map((n) => n / widthTotal * rect.cx);
        const hEmu = heightsEmu.map((n) => n / heightTotal * rect.cy);
        const matched = [];
        let precedingHeight = hEmu[0];
        for (let ri = 1; ri < 5; ri += 1) {
          const centerY = rect.y + precedingHeight + hEmu[ri] / 2;
          const candidates = slideShapes.filter((shape) => {
            const bound = transform(shape, 'spPr');
            if (!bound) return false;
            const middle = bound.y + bound.cy / 2;
            return bound.x > rect.x + wEmu[0] * .65
              && bound.x < rect.x + rect.cx && bound.cx > rect.cx * .52
              && Math.abs(middle - centerY) < hEmu[ri] * .38;
          });
          const shapesWithGroups = candidates.map((shape) => {
            const paragraphs = Array.from(child(shape, 'txBody')?.children || [])
              .filter((p) => local(p) === 'p');
            const primary = paragraphs.length ? shapeText(paragraphs[0]).trim() : '';
            const values = primary.split(/\s{3,}/).map((v) => v.trim()).filter(Boolean);
            if (values.length !== 4) return null;
            const tail = paragraphs.slice(1).map((p) => shapeText(p).trim())
              .filter(Boolean).join(' ');
            if (tail) values[3] += '\n' + tail;
            const run = wpPptxXmlElements(shape, 'rPr')[0];
            const red = run && wpPptxXmlElements(run, 'srgbClr')[0];
            const color = String(red && red.getAttribute('val') || '').toUpperCase();
            if (color !== 'FF0000') return null;
            return { shape, values, fontPt: Number(run.getAttribute('sz')) / 100 || 20 };
          }).filter(Boolean);
          if (shapesWithGroups.length !== 1) { matched.length = 0; break; }
          matched.push({ ...shapesWithGroups[0], row: ri });
          precedingHeight += hEmu[ri];
        }
        if (matched.length !== 4) continue;
        const pxWidth = rect.cx / 9525;
        const pxHeight = rect.cy / 9525;
        const colWidths = wEmu.map((n) => n / 9525);
        const rowHeights = hEmu.map((n) => n / 9525);
        const starts = [];
        let at = 0;
        colWidths.forEach((w) => { starts.push(at); at += w; });
        const tblCanvas = newCanvas(pxWidth, pxHeight);
        if (!tblCanvas) continue;
        const tctx = tblCanvas.ctx;
        let top = 0;
        for (let ri = 0; ri < 5; ri += 1) {
          const h = rowHeights[ri];
          for (let ci = 0; ci < 5; ci += 1) {
            const x = starts[ci], w = colWidths[ci];
            tctx.fillStyle = ri === 0 ? '#4472C4' : (ri % 2 ? '#CFD5E8' : '#E8EAF3');
            tctx.fillRect(x, top, w, h);
            tctx.lineWidth = 1.0;
            tctx.strokeStyle = '#FFFFFF';
            tctx.strokeRect(x + .5, top + .5, w - 1, h - 1);
            const raw = texts[ri][ci];
            if (!raw) continue;
            let lines = [raw];
            if (ri > 0 && ci === 0) {
              if (ri === 2) lines = ['Phân', 'lớp'];
              else if (ri === 4) lines = ['Số e tối', 'đa'];
            }
            const fs = ri === 0 ? 23 : 21;
            const lh = fs * 1.05;
            tctx.fillStyle = ri === 0 ? '#FFFFFF' : '#111111';
            tctx.font = `${ri === 0 ? 'bold ' : ''}${fs}px "Times New Roman", serif`;
            tctx.textAlign = 'center';
            tctx.textBaseline = 'middle';
            const center = top + h / 2;
            lines.forEach((line, index) => tctx.fillText(line, x + w / 2,
              center + (index - (lines.length - 1) / 2) * lh, w - 7));
          }
          top += h;
        }
        const images = [{ node:frame, content:await toPng(tblCanvas.canvas), rect,
          label:'table background', idNode:child(child(frame, 'nvGraphicFramePr'), 'cNvPr') }];
        // Dùng *cùng hệ tọa độ toàn bảng* cho cả 4 lớp chữ đỏ.
        // p:pic trên một số bản renderer có thể bị animation chi phối vị trí
        // gốc của shape. Nếu ảnh chỉ cao một hàng, 4 hàng có thể chồng lên
        // hàng tiêu đề. Vì thế mỗi lớp là PNG TRANSPARENT bằng đúng kích thước
        // bảng và vẽ chữ vào đúng hàng tương đối trong ảnh. Shape ID / timing
        // vẫn giữ riêng để từng hàng hiện theo hiệu ứng PowerPoint gốc.
        let rowOffset = rowHeights[0];
        for (let ri = 1; ri < 5; ri += 1) {
          const m = matched[ri - 1];
          const h = rowHeights[ri];
          const built = newCanvas(pxWidth, pxHeight);
          if (!built) { images.length = 0; break; }
          const ctx = built.ctx;
          ctx.fillStyle = '#FF0000';
          ctx.textAlign = 'center';
          ctx.textBaseline = 'middle';
          const size = Math.max(14, Math.min(33, m.fontPt * (96 / 72)));
          const lineHeight = size * 1.10;
          ctx.font = `bold ${size}px "Times New Roman", serif`;
          for (let ci = 1; ci < 5; ci += 1) {
            const lines = m.values[ci - 1].split('\n').filter(Boolean);
            const middleX = starts[ci] + colWidths[ci] / 2;
            const middleY = rowOffset + h / 2;
            const fontSize = (lines.length > 1 && lineHeight * lines.length > h * .91)
              ? size * .82 : size;
            ctx.font = `bold ${fontSize}px "Times New Roman", serif`;
            const step = fontSize * 1.04;
            lines.forEach((line, j) => ctx.fillText(line.trim(), middleX,
              middleY + (j - (lines.length - 1) / 2) * step, colWidths[ci] - 5));
          }
          const idNode = child(child(m.shape, 'nvSpPr'), 'cNvPr');
          images.push({ node:m.shape, content:await toPng(built.canvas),
            rect:{ x:rect.x, y:rect.y, cx:rect.cx, cy:rect.cy },
            label:'table overlay aligned', idNode });
          rowOffset += h;
        }
        if (images.length !== 5 || images.some((o) => !o.content || !o.idNode)) continue;
        // Các TextBox gốc có hiệu ứng di chuyển theo ppt_y (từ ngoài slide
        // vào ô bảng). Khi chuyển TextBox thành p:pic, renderer áp dụng lại
        // phép tịnh tiến này theo hình học ảnh, khiến 4 ảnh chữ đỏ dồn lên
        // hàng đầu. Giữ timing hiện/ẩn và các hiệu ứng không thay đổi vị trí,
        // chỉ vô hiệu hóa animation ppt_x/ppt_y của 4 hàng đã chuyển đổi.
        // Không đụng đến animation của bảng nền hoặc các shape khác.
        const alignedOverlayIds = new Set(matched.map((m) =>
          String(child(child(m.shape, 'nvSpPr'), 'cNvPr')?.getAttribute('id') || '')
        ));
        wpPptxXmlElements(xml, 'anim').slice().forEach((anim) => {
          const bhvr = child(anim, 'cBhvr');
          const target = child(child(bhvr, 'tgtEl'), 'spTgt');
          const attrList = child(bhvr, 'attrNameLst');
          const attributes = Array.from(attrList?.children || [])
            .filter((n) => local(n) === 'attrName')
            .map((n) => String(n.textContent || '').trim().toLowerCase());
          if (!alignedOverlayIds.has(String(target?.getAttribute('spid') || ''))
            || !attributes.some((a) => a === 'ppt_x' || a === 'ppt_y')) return;
          if (anim.parentNode) anim.parentNode.removeChild(anim);
        });
        for (let i = 0; i < images.length; i += 1) {
          const o = images[i];
          const id = String(o.idNode.getAttribute('id'));
          const name = String(o.idNode.getAttribute('name') || o.label);
          const path = `ppt/media/mvip_aligned_table_${slideNo}_${converted}_${i}.png`;
          zip.file(path, o.content);
          const rid = `rId${ridNumber++}`;
          const rel = relXml.createElementNS(relNs, 'Relationship');
          rel.setAttribute('Id', rid);
          rel.setAttribute('Type', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image');
          rel.setAttribute('Target', `../media/${path.split('/').pop()}`);
          relRoot.appendChild(rel);
          o.node.parentNode.replaceChild(makePicture(id, name, rid, o.rect), o.node);
        }
        converted++;
      }
      if (converted) {
        const typeFile = zip.file('[Content_Types].xml');
        if (typeFile) {
          const types = parser.parseFromString(await typeFile.async('text'), 'application/xml');
          if (!wpPptxXmlElements(types, 'Default').some((node) =>
            String(node.getAttribute('Extension') || '').toLowerCase() === 'png')) {
            const def = types.createElementNS('http://schemas.openxmlformats.org/package/2006/content-types', 'Default');
            def.setAttribute('Extension', 'png');
            def.setAttribute('ContentType', 'image/png');
            types.documentElement.appendChild(def);
            zip.file('[Content_Types].xml', serializer.serializeToString(types));
          }
        }
        zip.file(relPath, serializer.serializeToString(relXml));
      }
      return converted;
    }

    async function wpPowerPointRenderableBuffer(arrayBuffer) {
      if (!window.JSZip || typeof window.JSZip.loadAsync !== 'function') return arrayBuffer;
      const zip = await window.JSZip.loadAsync(arrayBuffer);
      const parser = new DOMParser();
      const serializer = new XMLSerializer();
      let changed = false;
      const slidePaths = Object.keys(zip.files || {})
        .filter((path) => /^ppt\/slides\/slide\d+\.xml$/i.test(path));
      let convertedMathTypeCount = 0;
      let presentationSlideWidth = 0;
      let presentationSlideHeight = 0;
      try {
        const presentation = parser.parseFromString(await zip.file('ppt/presentation.xml').async('text'), 'application/xml');
        const dims = wpPptxXmlElements(presentation, 'sldSz')[0];
        presentationSlideWidth = Number(dims && dims.getAttribute('cx')) || 0;
        presentationSlideHeight = Number(dims && dims.getAttribute('cy')) || 0;
      } catch (_) {}
      for (const slidePath of slidePaths) {
        const source = await zip.file(slidePath).async('text');
        const xml = parser.parseFromString(source, 'application/xml');
        let slideChanged = false;
        const alternateContents = wpPptxXmlElements(xml, 'AlternateContent');
        const isotopeOverlays = [];
        for (const alternateContent of alternateContents) {
          const choice = Array.from(alternateContent.children || []).find((child) => (
            String(child.localName || child.nodeName || '').split(':').pop() === 'Choice'
          ));
          const fallback = Array.from(alternateContent.children || []).find((child) => (
            String(child.localName || child.nodeName || '').split(':').pop() === 'Fallback'
          ));
          if (!fallback || !alternateContent.parentNode) continue;
          wpPptxRestoreTableMathInFallback(choice, fallback, xml);
          await wpPptxPrepareIsotopeTableOverlays(choice, fallback, isotopeOverlays);
          Array.from(fallback.childNodes || []).forEach((child) => {
            alternateContent.parentNode.insertBefore(child.cloneNode(true), alternateContent);
          });
          alternateContent.remove();
          slideChanged = true;
          changed = true;
        }
        if (isotopeOverlays.length) {
          if (await wpPptxInsertTableIsotopeOverlays(
            zip, slidePath, xml, isotopeOverlays, parser, serializer
          )) {
            slideChanged = true;
            changed = true;
          }
        }
        if (wpPptxFixFullSlidePicturePlaceholders(
          xml, presentationSlideWidth, presentationSlideHeight
        ) > 0) {
          slideChanged = true;
          changed = true;
        }
        if (wpPptxNormalizeWingdingsGlyphs(xml) > 0) {
          slideChanged = true;
          changed = true;
        }
        if (await wpPptxFixOverlayTextTables(
          zip, slidePath, xml, parser, serializer
        ) > 0) {
          slideChanged = true;
          changed = true;
        }
        if (await wpPptxReplaceOrbitalBoxTables(
          zip, slidePath, xml, parser, serializer
        ) > 0) {
          slideChanged = true;
          changed = true;
        }
        if (wpPptxRestoreInterleavedEquationParagraphs(xml) > 0) {
          slideChanged = true;
          changed = true;
        }
        if (wpPptxPreserveTightTextOverflow(xml) > 0) {
          slideChanged = true;
          changed = true;
        }
        /* MathType phải đi trước EMF chung. Nếu EMF chung chạy trước,
           preview MathType dùng font Symbol/MT Extra có thể bị raster sai thành
           ký tự €/#/CH chồng nhau như ở bài Polymer. */
        try {
          const converted = await wpPptxReplaceMathTypePreviews(
            zip, slidePath, xml, parser, serializer
          );
          if (converted > 0) {
            convertedMathTypeCount += converted;
            slideChanged = true;
            changed = true;
          }
        } catch (error) {
          console.warn('Không thay được ảnh dự phòng MathType của một slide PowerPoint:', error);
        }
        try {
          const convertedEmf = await wpPptxReplaceEmfPicturesWithPng(
            zip, slidePath, xml, parser, serializer
          );
          if (convertedEmf > 0) {
            slideChanged = true;
            changed = true;
          }
        } catch (error) {
          console.warn('Không chuyển được ảnh EMF của một slide PowerPoint:', error);
        }
        /* Các nhãn A/B/C/D của mẫu trò chơi nằm trong hình thoi 12 px nhưng
           dùng chữ 28 pt và lề trái lớn. Ghi rõ “không tự co” + cho phép tràn
           để bộ dựng web giữ đúng cách PowerPoint hiển thị chữ bên ngoài shape. */
        wpPptxXmlElements(xml, 'cNvPr').forEach((properties) => {
          const details = wpPptxShapeDetailsFromNode(properties);
          const label = String(details.text || '').replace(/\s+/g, '').toUpperCase();
          const bounds = details.bounds;
          if (!/^[ABCD]$/.test(label) || !bounds
            || Number(bounds.cx) > 500000 || Number(bounds.cy) > 600000
            || !(details.shape instanceof Element)) return;
          const bodyProperties = wpPptxXmlElements(details.shape, 'bodyPr')[0];
          if (!(bodyProperties instanceof Element)) return;
          bodyProperties.setAttribute('wrap', 'none');
          bodyProperties.setAttribute('horzOverflow', 'overflow');
          bodyProperties.setAttribute('vertOverflow', 'overflow');
          Array.from(bodyProperties.children || []).forEach((child) => {
            const childName = String(child.localName || child.nodeName || '').split(':').pop();
            if (['spAutoFit', 'normAutofit'].includes(childName)) child.remove();
          });
          if (!Array.from(bodyProperties.children || []).some((child) => (
            String(child.localName || child.nodeName || '').split(':').pop() === 'noAutofit'
          ))) {
            const prefix = String(bodyProperties.prefix || 'a');
            bodyProperties.appendChild(xml.createElementNS(
              bodyProperties.namespaceURI || 'http://schemas.openxmlformats.org/drawingml/2006/main',
              `${prefix}:noAutofit`
            ));
          }
          slideChanged = true;
          changed = true;
        });
        if (slideChanged) zip.file(slidePath, serializer.serializeToString(xml));
      }
      /* Bullet có thể nằm ở layout/master thay vì slide. Chuẩn hóa các phần
         kế thừa này để mọi slide dùng cùng một kết quả, kể cả ảnh xem trước. */
      const inheritedTextPaths = Object.keys(zip.files || {}).filter((path) => (
        /^ppt\/(?:slideLayouts|slideMasters)\/[^/]+\.xml$/i.test(path)
          || /^ppt\/presentation\.xml$/i.test(path)
      ));
      for (const partPath of inheritedTextPaths) {
        try {
          const source = await zip.file(partPath).async('text');
          const xml = parser.parseFromString(source, 'application/xml');
          const glyphChanges = wpPptxNormalizeWingdingsGlyphs(xml);
          const overflowChanges = wpPptxPreserveTightTextOverflow(xml);
          if (glyphChanges > 0 || overflowChanges > 0) {
            zip.file(partPath, serializer.serializeToString(xml));
            changed = true;
          }
        } catch (_) {}
      }
      if (changed) {
        await wpPptxEnsurePngContentType(zip, parser, serializer);
      }
      if (!changed) return arrayBuffer;
      return zip.generateAsync({ type: 'arraybuffer', compression: 'DEFLATE' });
    }

    const WP_PPTX_THUMBNAIL_CACHE = 'mvip-pptx-thumbnails-v3';

    function wpPowerPointHash(value) {
      let hash = 2166136261;
      const textValue = String(value || '');
      for (let index = 0; index < textValue.length; index += 1) {
        hash ^= textValue.charCodeAt(index);
        hash = Math.imul(hash, 16777619);
      }
      return (hash >>> 0).toString(36);
    }

    function wpPowerPointFileCacheKey(file) {
      return `pptx-${wpPowerPointHash([
        String(file && file.name || ''),
        Number(file && file.size) || 0,
        Number(file && file.lastModified) || 0,
      ].join('|'))}`;
    }

    function wpPowerPointProgressStorageKey(cacheKey = wpOrdinaryState.pptxCacheKey) {
      return cacheKey ? `mvip:pptx-progress:${cacheKey}` : '';
    }

    function wpReadRememberedPowerPointSlide(cacheKey, pageCount) {
      const storageKey = wpPowerPointProgressStorageKey(cacheKey);
      if (!storageKey) return -1;
      try {
        const saved = JSON.parse(localStorage.getItem(storageKey) || 'null');
        const index = Number(saved && saved.index);
        return Number.isInteger(index) && index >= 0 && index < pageCount ? index : -1;
      } catch (_) {
        return -1;
      }
    }

    function wpRememberPowerPointSlide(index) {
      const storageKey = wpPowerPointProgressStorageKey();
      const safeIndex = Number(index);
      if (!storageKey || !Number.isInteger(safeIndex) || safeIndex < 0
        || safeIndex >= wpOrdinaryState.pageCount) return;
      wpOrdinaryState.pptxRememberedPageIndex = safeIndex;
      try {
        localStorage.setItem(storageKey, JSON.stringify({
          index: safeIndex,
          pageCount: wpOrdinaryState.pageCount,
          updatedAt: Date.now(),
        }));
      } catch (_) {}
    }

    function wpPowerPointThumbnailCacheUrl(cacheKey) {
      return new URL(`/__mvip_pptx_thumbnails__/${encodeURIComponent(cacheKey)}.json`, window.location.origin).href;
    }

    async function wpLoadCachedPowerPointThumbnails(cacheKey, pageCount) {
      if (!cacheKey || !('caches' in window)) return [];
      try {
        const cache = await window.caches.open(WP_PPTX_THUMBNAIL_CACHE);
        const response = await cache.match(wpPowerPointThumbnailCacheUrl(cacheKey));
        if (!response) return [];
        const payload = await response.json();
        if (Number(payload && payload.pageCount) !== Number(pageCount)
          || !Array.isArray(payload && payload.thumbnails)) return [];
        return payload.thumbnails.slice(0, pageCount).map((value) => String(value || ''));
      } catch (_) {
        return [];
      }
    }

    async function wpSaveCachedPowerPointThumbnails(cacheKey, pageCount, thumbnails) {
      if (!cacheKey || !('caches' in window) || !Array.isArray(thumbnails)
        || !thumbnails.some(Boolean)) return;
      try {
        const cache = await window.caches.open(WP_PPTX_THUMBNAIL_CACHE);
        const savedAt = Date.now();
        await cache.put(wpPowerPointThumbnailCacheUrl(cacheKey), new Response(JSON.stringify({
          pageCount,
          thumbnails: thumbnails.slice(0, pageCount),
          savedAt,
        }), {
          headers: {
            'content-type': 'application/json; charset=utf-8',
            'x-mvip-saved-at': String(savedAt),
          },
        }));
        const requests = await cache.keys();
        const dated = await Promise.all(requests.map(async (request) => {
          const response = await cache.match(request);
          return { request, savedAt: Number(response && response.headers.get('x-mvip-saved-at')) || 0 };
        }));
        dated.sort((left, right) => right.savedAt - left.savedAt);
        await Promise.all(dated.slice(6).map((entry) => cache.delete(entry.request)));
      } catch (_) {}
    }

    function wpUpdatePowerPointPickerThumbnail(index) {
      if (questionPickerModal.hidden || !questionPickerModal.classList.contains('is-powerpoint-picker')) return;
      const thumbnailUrl = String(wpOrdinaryState.pptxThumbnails[index] || '');
      if (!thumbnailUrl) return;
      const button = questionPickerBody.querySelector(`[data-word-question-picker-index="${index}"]`);
      const placeholder = button && button.querySelector('.word-presentation-slide-thumbnail.is-loading');
      if (!(placeholder instanceof Element)) return;
      const image = document.createElement('img');
      image.className = 'word-presentation-slide-thumbnail';
      image.src = thumbnailUrl;
      image.alt = `Ảnh đại diện slide ${index + 1}`;
      placeholder.replaceWith(image);
    }

    function wpTrimPowerPointPreloadedPages(currentIndex = wpOrdinaryState.pageIndex) {
      const current = Math.max(0, Number(currentIndex) || 0);
      const upcoming = new Set(wpPowerPointUpcomingSlideIndices(current));
      wpOrdinaryState.pptxPreloadedPages.forEach((page, index) => {
        if (!upcoming.has(index)) wpOrdinaryState.pptxPreloadedPages[index] = null;
      });
    }

    function wpPowerPointIdleSlice(timeout = 900) {
      return new Promise((resolve) => {
        if (typeof window.requestIdleCallback === 'function') {
          window.requestIdleCallback(() => resolve(), { timeout });
        } else {
          window.setTimeout(resolve, 90);
        }
      });
    }

    function wpPowerPointAwaitWithTimeout(promise, timeout = 8000) {
      return new Promise((resolve) => {
        let settled = false;
        const finish = () => {
          if (settled) return;
          settled = true;
          clearTimeout(timer);
          resolve();
        };
        const timer = window.setTimeout(finish, Math.max(250, Number(timeout) || 8000));
        Promise.resolve(promise).then(finish, finish);
      });
    }

    async function wpWaitPowerPointDomAssets(root, timeout = 5000) {
      if (!(root instanceof Element)) return;
      const pending = [];
      root.querySelectorAll('img').forEach((image) => {
        if (image.complete) {
          if (image.naturalWidth > 0 && typeof image.decode === 'function') {
            pending.push(image.decode().catch(() => {}));
          }
          return;
        }
        pending.push(new Promise((resolve) => {
          const finish = () => {
            image.removeEventListener('load', finish);
            image.removeEventListener('error', finish);
            resolve();
          };
          image.addEventListener('load', finish, { once: true });
          image.addEventListener('error', finish, { once: true });
        }));
      });
      const imageUrls = new Set();
      root.querySelectorAll('image').forEach((image) => {
        const url = String(image.getAttribute('href')
          || image.getAttributeNS('http://www.w3.org/1999/xlink', 'href') || '').trim();
        if (url) imageUrls.add(url);
      });
      root.querySelectorAll('*').forEach((element) => {
        if (!(element instanceof HTMLElement)) return;
        const background = String(element.style.backgroundImage || '');
        Array.from(background.matchAll(/url\(["']?([^"')]+)["']?\)/g))
          .forEach((match) => imageUrls.add(String(match[1] || '').trim()));
      });
      imageUrls.forEach((url) => {
        if (!url || /^data:/i.test(url)) return;
        pending.push(new Promise((resolve) => {
          const image = new Image();
          image.onload = resolve;
          image.onerror = resolve;
          image.src = url;
          if (image.complete) resolve();
        }));
      });
      if (pending.length) {
        await wpPowerPointAwaitWithTimeout(Promise.allSettled(pending), timeout);
      }
      if (document.fonts && document.fonts.ready) {
        await wpPowerPointAwaitWithTimeout(document.fonts.ready, Math.min(3000, timeout));
      }
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
    }

    async function wpWaitPowerPointSlideAssets(viewer, slideIndex, root, timeout = 9000) {
      const handles = viewer && viewer.slideHandles;
      const handle = handles && typeof handles.get === 'function'
        ? handles.get(Number(slideIndex)) : null;
      if (handle && handle.ready && typeof handle.ready.then === 'function') {
        await wpPowerPointAwaitWithTimeout(handle.ready, timeout);
      }
      await wpWaitPowerPointDomAssets(root, Math.min(5000, timeout));
    }

    function wpPowerPointWheelOpen() {
      const wheel = document.getElementById('cv7991MagicWheelModal');
      return wheel instanceof HTMLElement && !wheel.hidden;
    }

    document.addEventListener('mvip-magic-wheel-closed', () => {
      wpRequestPowerPointPreloadWindow();
    });

    async function wpRunPowerPointPreloadPump(serial) {
      const viewer = wpOrdinaryState.pptxPreloadViewer;
      const renderHost = wpOrdinaryState.pptxPreloadHost;
      if (wpPowerPointWheelOpen() || wpOrdinaryState.pptxPreloadRunning || !viewer || !(renderHost instanceof HTMLElement)) return;
      wpOrdinaryState.pptxPreloadRunning = true;
      const pumpStartPageIndex = wpOrdinaryState.pageIndex;
      const attemptedWindow = new Set();
      const attemptedThumbnails = new Set();
      const capture = typeof window.html2canvas === 'function' ? window.html2canvas : null;
      try {
        while (serial === wpOrdinaryState.pptxThumbnailSerial && wpOrdinaryState.kind === 'pptx-slide' && !wpPowerPointWheelOpen()) {
          const total = Math.max(0, Number(wpOrdinaryState.pageCount) || 0);
          const current = Math.max(0, Number(wpOrdinaryState.pageIndex) || 0);
          wpTrimPowerPointPreloadedPages(current);
          let targetIndex = wpPowerPointUpcomingSlideIndices(current)
            .find((index) => index < total && !(wpOrdinaryState.pptxPreloadedPages[index] instanceof HTMLElement)
              && !attemptedWindow.has(`${current}:${index}`));
          let targetKind = 'window';
          if (!Number.isInteger(targetIndex) && capture) {
            targetIndex = Array.from({ length: total }, (_, index) => index)
              .find((index) => !wpPowerPointSlideIsHidden(index) && !wpOrdinaryState.pptxThumbnails[index] && !attemptedThumbnails.has(index));
            targetKind = 'thumbnail';
          }
          if (!Number.isInteger(targetIndex)) break;
          if (targetKind === 'window') attemptedWindow.add(`${current}:${targetIndex}`);
          else attemptedThumbnails.add(targetIndex);
          await wpPowerPointIdleSlice();
          if (serial !== wpOrdinaryState.pptxThumbnailSerial || wpOrdinaryState.kind !== 'pptx-slide' || wpPowerPointWheelOpen()) break;
          if (!renderHost.isConnected) document.body.appendChild(renderHost);
          await viewer.renderSlide(targetIndex);
          await wpWaitPowerPointSlideAssets(viewer, targetIndex, renderHost);
          if (serial !== wpOrdinaryState.pptxThumbnailSerial || wpOrdinaryState.kind !== 'pptx-slide' || wpPowerPointWheelOpen()) break;
          const page = renderHost.firstElementChild;
          if (!(page instanceof HTMLElement)) {
            renderHost.remove();
            continue;
          }

          /* Gắn mã shape bằng chính model của viewer tải sẵn trước khi clone.
             Nhờ vậy trang chính không phải đoán lại thứ tự DOM từ một viewer
             khác khi Choice/Fallback hoặc Office Math hoàn tất bất đồng bộ. */
          wpTagPowerPointSlideNodes(
            viewer, targetIndex, wpPowerPointSlideDomFromRenderRoot(renderHost)
          );
          wpFixPowerPointWingdingsGlyphs(
            wpPowerPointSlideDomFromRenderRoot(renderHost)
          );

          const latestCurrent = Math.max(0, Number(wpOrdinaryState.pageIndex) || 0);
          if (wpPowerPointUpcomingSlideIndices(latestCurrent).includes(targetIndex)) {
            const preloadedPage = page.cloneNode(true);
            if (preloadedPage instanceof HTMLElement) {
              wpCopyRegionCanvasPixels(page, preloadedPage);
              preloadedPage.dataset.ordinaryPageIndex = String(targetIndex);
              preloadedPage.setAttribute('aria-label', `Trang chiếu PowerPoint ${targetIndex + 1}`);
              wpOrdinaryState.pptxPreloadedPages[targetIndex] = preloadedPage;
            }
          }

          if (capture && !wpOrdinaryState.pptxThumbnails[targetIndex]) {
            try {
              const width = Math.max(1, page.getBoundingClientRect().width || page.offsetWidth || 960);
              const canvas = await capture(page, {
                backgroundColor: '#ffffff', logging: false, useCORS: true,
                scale: Math.max(.14, Math.min(.28, 220 / width)),
              });
              wpOrdinaryState.pptxThumbnails[targetIndex] = canvas.toDataURL('image/jpeg', .68);
              wpUpdatePowerPointPickerThumbnail(targetIndex);
            } catch (_) {}
          }
          renderHost.remove();
          await new Promise((resolve) => setTimeout(resolve, 0));
        }
      } catch (error) {
        console.warn('Không dựng sẵn được một số slide PowerPoint:', error);
      } finally {
        renderHost.remove();
        wpOrdinaryState.pptxPreloadRunning = false;
        if (serial === wpOrdinaryState.pptxThumbnailSerial && wpOrdinaryState.kind === 'pptx-slide') {
          void wpSaveCachedPowerPointThumbnails(
            wpOrdinaryState.pptxCacheKey,
            wpOrdinaryState.pageCount,
            wpOrdinaryState.pptxThumbnails
          );
          const current = Math.max(0, Number(wpOrdinaryState.pageIndex) || 0);
          const needsWindow = wpPowerPointUpcomingSlideIndices(current).some((index) => (
            index < wpOrdinaryState.pageCount
            && !(wpOrdinaryState.pptxPreloadedPages[index] instanceof HTMLElement)
          ));
          if (needsWindow && current !== pumpStartPageIndex) {
            queueMicrotask(wpRequestPowerPointPreloadWindow);
          }
        }
      }
    }

    function wpRequestPowerPointPreloadWindow() {
      if (wpOrdinaryState.kind !== 'pptx-slide' || wpOrdinaryState.pptxPreloadRunning
        || !wpOrdinaryState.pptxPreloadViewer) return;
      const serial = wpOrdinaryState.pptxThumbnailSerial;
      wpOrdinaryState.pptxThumbnailPromise = wpRunPowerPointPreloadPump(serial);
    }

    async function wpPreparePowerPointSlideThumbnails(PptxViewer, renderBuffer, serial,
      slideWidth = 1280, slideHeight = 720) {
      if (!PptxViewer || typeof PptxViewer.open !== 'function') return;
      const renderHost = document.createElement('div');
      renderHost.setAttribute('aria-hidden', 'true');
      Object.assign(renderHost.style, {
        position: 'fixed', left: '-100000px', top: '0', width: `${Math.max(160, Number(slideWidth) || 1280)}px`,
        height: `${Math.max(90, Number(slideHeight) || 720)}px`, overflow: 'hidden', pointerEvents: 'none', zIndex: '-1',
      });
      document.body.appendChild(renderHost);
      let thumbnailViewer = null;
      let retained = false;
      try {
        thumbnailViewer = await PptxViewer.open(renderBuffer, renderHost, {
          renderMode: 'slide', fitMode: 'contain', pdfjs: false,
          lazyMedia: true, lazySlides: true,
        });
        if (serial !== wpOrdinaryState.pptxThumbnailSerial || wpOrdinaryState.kind !== 'pptx-slide') return;
        wpOrdinaryState.pptxPreloadViewer = thumbnailViewer;
        wpOrdinaryState.pptxPreloadHost = renderHost;
        retained = true;
        renderHost.remove();
        await wpRunPowerPointPreloadPump(serial);
      } catch (error) {
        console.warn('Không khởi tạo được bộ tải nền PowerPoint:', error);
      } finally {
        if (!retained) {
          try {
            if (thumbnailViewer && typeof thumbnailViewer.destroy === 'function') thumbnailViewer.destroy();
            else if (thumbnailViewer && typeof thumbnailViewer.close === 'function') thumbnailViewer.close();
          } catch (_) {}
        }
        renderHost.remove();
      }
    }

    function wpSchedulePowerPointSlidePreload(PptxViewer, renderBuffer, serial,
      slideWidth, slideHeight) {
      return new Promise((resolve) => {
        const run = () => {
          wpOrdinaryState.pptxPreloadIdleHandle = 0;
          wpOrdinaryState.pptxPreloadIdleKind = '';
          if (serial !== wpOrdinaryState.pptxThumbnailSerial || wpOrdinaryState.kind !== 'pptx-slide') {
            resolve();
            return;
          }
          if (wpPowerPointWheelOpen()) {
            document.addEventListener('mvip-magic-wheel-closed', run, { once:true });
            return;
          }
          Promise.resolve(wpPreparePowerPointSlideThumbnails(
            PptxViewer, renderBuffer, serial, slideWidth, slideHeight
          )).then(resolve, resolve);
        };
        if (typeof window.requestIdleCallback === 'function') {
          wpOrdinaryState.pptxPreloadIdleKind = 'idle';
          wpOrdinaryState.pptxPreloadIdleHandle = window.requestIdleCallback(run, { timeout: 700 });
        } else {
          wpOrdinaryState.pptxPreloadIdleKind = 'timeout';
          wpOrdinaryState.pptxPreloadIdleHandle = window.setTimeout(run, 180);
        }
      });
    }

    function wpPowerPointSafeHref(value) {
      return mvipSafeHyperlink(value);
    }

    function wpClearPowerPointImageZoom(root) {
      cv7991ClearPowerPointZoomDecorations(root);
    }

    function wpStopPowerPointMedia() {
      wpStopPowerPointUnlockedAudio();
      const root = wpOrdinaryState.pptxRoot;
      if (!(root instanceof Element)) return;
      root.querySelectorAll('video.pptx-native-video, audio.pptx-native-audio').forEach((media) => {
        try { media.pause(); } catch (_) {}
      });
      root.querySelectorAll('.pptx-native-countdown').forEach((countdown) => {
        const timerId = Number(countdown.dataset.pptxCountdownTimer) || 0;
        if (timerId) clearInterval(timerId);
        countdown.dataset.pptxCountdownTimer = '';
        countdown.dataset.pptxCountdownRunning = 'false';
        countdown.classList.remove('is-running', 'is-ending');
      });
    }

    function wpPowerPointShapeHost(slideElement, shapeId) {
      if (!(slideElement instanceof HTMLElement) || !shapeId) return null;
      const escaped = typeof CSS !== 'undefined' && CSS.escape
        ? CSS.escape(String(shapeId))
        : String(shapeId).replace(/[^A-Za-z0-9_-]/g, '');
      const host = slideElement.matches(`[data-pptx-node-id="${escaped}"]`)
        ? slideElement
        : slideElement.querySelector(`[data-pptx-node-id="${escaped}"]`);
      if (!(host instanceof HTMLElement)) return null;
      if (getComputedStyle(host).position === 'static') host.style.position = 'relative';
      return host;
    }

    function wpPowerPointShapeBoundsScore(slideElement, candidate, bounds, slideSize) {
      if (!(slideElement instanceof HTMLElement) || !(candidate instanceof HTMLElement) || !bounds) {
        return Number.POSITIVE_INFINITY;
      }
      const slideRect = slideElement.getBoundingClientRect();
      const slideWidth = Math.max(1, Number(slideSize && slideSize.width) || 12192000);
      const slideHeight = Math.max(1, Number(slideSize && slideSize.height) || 6858000);
      if (!(slideRect.width > 0) || !(slideRect.height > 0)) return Number.POSITIVE_INFINITY;
      const expected = {
        left: (Number(bounds.x) || 0) / slideWidth,
        top: (Number(bounds.y) || 0) / slideHeight,
        width: Math.max(0, Number(bounds.cx) || 0) / slideWidth,
        height: Math.max(0, Number(bounds.cy) || 0) / slideHeight,
      };
      if (!(expected.width > 0) || !(expected.height > 0)) return Number.POSITIVE_INFINITY;
      const rect = candidate.getBoundingClientRect();
      if (!(rect.width > 0) || !(rect.height > 0)) return Number.POSITIVE_INFINITY;
      const actual = {
        left: (rect.left - slideRect.left) / slideRect.width,
        top: (rect.top - slideRect.top) / slideRect.height,
        width: rect.width / slideRect.width,
        height: rect.height / slideRect.height,
      };
      return Math.abs(actual.left - expected.left)
        + Math.abs(actual.top - expected.top)
        + Math.abs(actual.width - expected.width)
        + Math.abs(actual.height - expected.height);
    }

    function wpPowerPointShapeHostByBounds(slideElement, bounds, slideSize, excludedHosts = null) {
      if (!(slideElement instanceof HTMLElement) || !bounds) return null;
      const candidates = Array.from(slideElement.children || [])
        .filter((candidate) => candidate instanceof HTMLElement
          && !(excludedHosts instanceof Set && excludedHosts.has(candidate))
          && !candidate.classList.contains('pptx-native-interaction-layer')
          && !candidate.classList.contains('pptx-native-toast')
          && !candidate.classList.contains('pptx-native-trigger-audio'));
      let best = null;
      candidates.forEach((candidate) => {
        const score = wpPowerPointShapeBoundsScore(slideElement, candidate, bounds, slideSize);
        if (!best || score < best.score) best = { candidate, score };
      });
      /* Chấp nhận sai số do bộ dựng làm tròn pixel và scale. Ngưỡng này vẫn
         đủ chặt để không thể nhầm ảnh V/X nhỏ với cả khung phương án lớn. */
      return best && best.score <= .12 ? best.candidate : null;
    }

    function wpCorrectPowerPointActionTargetTags(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement) || !plan) return;
      const actions = [];
      (Array.isArray(plan.triggers) ? plan.triggers : []).forEach((trigger) => {
        (Array.isArray(trigger && trigger.actions) ? trigger.actions : [])
          .forEach((action) => actions.push(action));
      });
      (Array.isArray(plan.groups) ? plan.groups : []).forEach((group) => {
        (Array.isArray(group) ? group : []).forEach((effect) => {
          (Array.isArray(effect && effect.actions) ? effect.actions : [])
            .forEach((action) => actions.push(action));
        });
      });
      const repaired = new Set();
      const assignedHosts = new Set();
      actions.forEach((action) => {
        const shapeId = String(action && action.targetShapeId || '').trim();
        if (!shapeId || !action.targetBounds || repaired.has(shapeId)) return;
        const escaped = typeof CSS !== 'undefined' && CSS.escape
          ? CSS.escape(shapeId) : shapeId.replace(/[^A-Za-z0-9_-]/g, '');
        const taggedHost = slideElement.matches(`[data-pptx-node-id="${escaped}"]`)
          ? slideElement : slideElement.querySelector(`[data-pptx-node-id="${escaped}"]`);

        /* ID do bộ dựng gắn vẫn là nguồn chính khi hình học của nó khớp XML.
           Một số bài trắc nghiệm đặt bản sao đáp án đúng phủ chính xác lên
           phương án thường. Nếu cứ tìm theo tọa độ, cả hai ID sẽ cùng bị gắn
           vào phần tử đầu tiên và bản sao đáp án đúng còn lại sẽ lộ từ đầu. */
        const taggedScore = wpPowerPointShapeBoundsScore(
          slideElement, taggedHost, action.targetBounds, plan.slideSize
        );
        if (taggedHost instanceof HTMLElement && taggedScore <= .12
          && !assignedHosts.has(taggedHost)) {
          assignedHosts.add(taggedHost);
          repaired.add(shapeId);
          return;
        }

        const geometryHost = wpPowerPointShapeHostByBounds(
          slideElement, action.targetBounds, plan.slideSize, assignedHosts
        );
        if (!(geometryHost instanceof HTMLElement)) return;
        if (taggedHost instanceof HTMLElement && taggedHost !== geometryHost) {
          taggedHost.removeAttribute('data-pptx-node-id');
        }
        geometryHost.dataset.pptxNodeId = shapeId;
        assignedHosts.add(geometryHost);
        repaired.add(shapeId);
      });
    }

    function wpPowerPointInteractionLayer(slideElement) {
      if (!(slideElement instanceof HTMLElement)) return null;
      let layer = Array.from(slideElement.children || []).find((child) => child instanceof HTMLElement
        && child.classList.contains('pptx-native-interaction-layer'));
      if (!(layer instanceof HTMLElement)) {
        layer = document.createElement('div');
        layer.className = 'pptx-native-interaction-layer';
        layer.setAttribute('aria-hidden', 'false');
        if (getComputedStyle(slideElement).position === 'static') slideElement.style.position = 'relative';
        slideElement.appendChild(layer);
      }
      return layer;
    }

    function wpPowerPointFallbackShapeHost(slideElement, shapeId) {
      if (!(slideElement instanceof HTMLElement) || !shapeId) return null;
      const layer = Array.from(slideElement.children || []).find((child) => child instanceof HTMLElement
        && child.classList.contains('pptx-native-interaction-layer'));
      if (!(layer instanceof HTMLElement)) return null;
      return Array.from(layer.children || []).find((child) => child instanceof HTMLElement
        && child.dataset.pptxFallbackShapeId === String(shapeId)) || null;
    }

    function wpPowerPointInteractionHost(slideElement, entry, plan) {
      const shapeId = String(entry && entry.shapeId || entry && entry.triggerShapeId || '').trim();
      const hiddenShapeIds = Array.isArray(plan && plan.hiddenShapeIds) ? plan.hiddenShapeIds : [];
      if (hiddenShapeIds.includes(shapeId)) return null;
      if (entry && entry.textLink) {
        const textHost = wpPowerPointShapeHost(slideElement, shapeId);
        if (textHost) return textHost;
      }
      const useCoordinates = !!(plan && plan.coordinateHitAreas && entry && entry.bounds);
      if (!useCoordinates) return wpPowerPointShapeHost(slideElement, shapeId);
      const size = plan.slideSize || {};
      const slideWidth = Math.max(1, Number(size.width) || 12192000);
      const slideHeight = Math.max(1, Number(size.height) || 6858000);
      const bounds = entry.bounds || {};
      const left = Math.max(0, Number(bounds.x) || 0);
      const top = Math.max(0, Number(bounds.y) || 0);
      const right = Math.min(slideWidth, (Number(bounds.x) || 0) + Math.max(0, Number(bounds.cx) || 0));
      const bottom = Math.min(slideHeight, (Number(bounds.y) || 0) + Math.max(0, Number(bounds.cy) || 0));
      if (!(right > left) || !(bottom > top)) return null;
      let host = wpPowerPointFallbackShapeHost(slideElement, shapeId);
      if (!(host instanceof HTMLElement)) {
        const layer = wpPowerPointInteractionLayer(slideElement);
        if (!(layer instanceof HTMLElement)) return null;
        host = document.createElement('div');
        host.className = 'pptx-native-fallback-host';
        host.dataset.pptxFallbackShapeId = shapeId;
        layer.appendChild(host);
      }
      host.style.left = `${(left / slideWidth) * 100}%`;
      host.style.top = `${(top / slideHeight) * 100}%`;
      host.style.width = `${((right - left) / slideWidth) * 100}%`;
      host.style.height = `${((bottom - top) / slideHeight) * 100}%`;
      return host;
    }

    const WP_PPTX_MILLIONAIRE_PRIZE_SOUND = 'data:audio/mpeg;base64,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';

    const WP_PPTX_MILLIONAIRE_INTRO_SOUND = 'data:audio/mpeg;base64,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';

    function wpPowerPointCompatibleAudioSource(entry) {
      const mediaPath = String(entry && entry.mediaPath || '');
      const shapeName = String(entry && entry.shapeName || '').replace(/\s+/g, ' ').trim();
      if (/\.wma$/i.test(mediaPath) && /^Kbc\s*\(2\)\s*\(0\)$/i.test(shapeName)) {
        return WP_PPTX_MILLIONAIRE_INTRO_SOUND;
      }
      if (/\.wma$/i.test(mediaPath) && /^Kbc\s*\(1\)$/i.test(shapeName)) {
        return WP_PPTX_MILLIONAIRE_PRIZE_SOUND;
      }
      return String(entry && entry.sourceUrl || '');
    }

    function wpDecodePowerPointAudio(context, arrayBuffer) {
      return new Promise((resolve, reject) => {
        let settled = false;
        const finish = (buffer) => {
          if (settled) return;
          settled = true;
          resolve(buffer);
        };
        const fail = (error) => {
          if (settled) return;
          settled = true;
          reject(error);
        };
        try {
          const pending = context.decodeAudioData(arrayBuffer.slice(0), finish, fail);
          if (pending && typeof pending.then === 'function') pending.then(finish, fail);
        } catch (error) {
          fail(error);
        }
      });
    }

    function wpPowerPointAudioBuffer(sourceUrl) {
      const context = wpOrdinaryState.pptxAudioContext;
      const key = String(sourceUrl || '');
      if (!context || !key) return Promise.resolve(null);
      const cached = wpOrdinaryState.pptxAudioBufferPromises.get(key);
      if (cached) return cached;
      const pending = fetch(key)
        .then((response) => {
          if (!response.ok) throw new Error(`Không tải được âm thanh PowerPoint (${response.status}).`);
          return response.arrayBuffer();
        })
        .then((arrayBuffer) => wpDecodePowerPointAudio(context, arrayBuffer))
        .catch(() => null);
      wpOrdinaryState.pptxAudioBufferPromises.set(key, pending);
      return pending;
    }

    function wpPrimePowerPointAudio() {
      const AudioContextClass = window.AudioContext || window.webkitAudioContext;
      if (typeof AudioContextClass !== 'function') return null;
      let context = wpOrdinaryState.pptxAudioContext;
      if (!context || context.state === 'closed') {
        try {
          context = new AudioContextClass();
          wpOrdinaryState.pptxAudioContext = context;
        } catch (_) {
          return null;
        }
      }
      try {
        if (context.state === 'suspended') {
          const pending = context.resume();
          if (pending && typeof pending.then === 'function') {
            pending.then(() => {
              wpOrdinaryState.pptxAudioUnlocked = context.state === 'running';
            }).catch(() => {});
          }
        }
        const oscillator = context.createOscillator();
        const gain = context.createGain();
        gain.gain.value = 0;
        oscillator.connect(gain);
        gain.connect(context.destination);
        oscillator.start(context.currentTime);
        oscillator.stop(context.currentTime + .02);
      } catch (_) {}
      wpOrdinaryState.pptxAudioUnlocked = context.state === 'running';
      wpPowerPointAudioBuffer(WP_PPTX_MILLIONAIRE_INTRO_SOUND);
      wpPowerPointAudioBuffer(WP_PPTX_MILLIONAIRE_PRIZE_SOUND);
      return context;
    }

    function wpStopPowerPointUnlockedAudio(shapeId = '') {
      const requestedShapeId = String(shapeId || '');
      wpOrdinaryState.pptxAudioSourceNodes.forEach((source, activeShapeId) => {
        if (requestedShapeId && requestedShapeId !== activeShapeId) return;
        try { source.stop(); } catch (_) {}
        try { source.disconnect(); } catch (_) {}
        wpOrdinaryState.pptxAudioSourceNodes.delete(activeShapeId);
      });
    }

    function wpPlayPowerPointUnlockedAudio(media, startSeconds = 0) {
      if (!(media instanceof HTMLMediaElement) || media.dataset.pptxUnlockedAudio !== 'true') return false;
      const context = wpOrdinaryState.pptxAudioContext;
      const sourceUrl = String(media.dataset.pptxCompatibleSource || '');
      const shapeId = String(media.dataset.pptxMediaShapeId || '');
      const slideIndex = wpOrdinaryState.pageIndex;
      if (!context || !sourceUrl || context.state === 'closed') return false;
      wpStopPowerPointUnlockedAudio(shapeId);
      const pendingResume = context.state === 'suspended' ? context.resume().catch(() => {}) : Promise.resolve();
      Promise.all([pendingResume, wpPowerPointAudioBuffer(sourceUrl)]).then(([, buffer]) => {
        if (!buffer || context.state !== 'running' || wpOrdinaryState.kind !== 'pptx-slide'
          || wpOrdinaryState.pageIndex !== slideIndex) {
          media.dataset.pptxPendingPlay = 'true';
          return;
        }
        wpStopPowerPointUnlockedAudio(shapeId);
        const source = context.createBufferSource();
        const gain = context.createGain();
        source.buffer = buffer;
        gain.gain.value = Math.max(0, Math.min(1, Number(media.dataset.pptxVolume) || .62));
        source.connect(gain);
        gain.connect(context.destination);
        source.onended = () => {
          if (wpOrdinaryState.pptxAudioSourceNodes.get(shapeId) === source) {
            wpOrdinaryState.pptxAudioSourceNodes.delete(shapeId);
          }
          media.dataset.pptxPendingPlay = 'false';
        };
        wpOrdinaryState.pptxAudioSourceNodes.set(shapeId, source);
        media.dataset.pptxPendingPlay = 'false';
        const safeStart = Math.min(Math.max(0, Number(startSeconds) || 0), Math.max(0, buffer.duration - .05));
        source.start(0, safeStart);
      }).catch(() => {
        media.dataset.pptxPendingPlay = 'true';
      });
      return true;
    }

    function wpPowerPointMediaElement(shapeId) {
      const root = wpOrdinaryState.pptxRoot;
      if (!(root instanceof HTMLElement) || !shapeId) return null;
      const escaped = typeof CSS !== 'undefined' && CSS.escape
        ? CSS.escape(String(shapeId))
        : String(shapeId).replace(/[^A-Za-z0-9_-]/g, '');
      const media = root.querySelector(`[data-pptx-media-shape-id="${escaped}"]`);
      return media instanceof HTMLMediaElement ? media : null;
    }

    function wpPowerPointDetachedAudioHost(slideElement, shapeId) {
      if (!(slideElement instanceof HTMLElement) || !shapeId) return null;
      const layer = wpPowerPointInteractionLayer(slideElement);
      if (!(layer instanceof HTMLElement)) return null;
      const escaped = typeof CSS !== 'undefined' && CSS.escape
        ? CSS.escape(String(shapeId))
        : String(shapeId).replace(/[^A-Za-z0-9_-]/g, '');
      let host = layer.querySelector(`[data-pptx-detached-audio-id="${escaped}"]`);
      if (!(host instanceof HTMLElement)) {
        host = document.createElement('div');
        host.className = 'pptx-native-audio-host pptx-native-detached-audio-host';
        host.dataset.pptxDetachedAudioId = String(shapeId);
        layer.appendChild(host);
      }
      return host;
    }

    function wpPowerPointCountdownElement(shapeId) {
      const root = wpOrdinaryState.pptxRoot;
      if (!(root instanceof HTMLElement) || !shapeId) return null;
      const escaped = typeof CSS !== 'undefined' && CSS.escape
        ? CSS.escape(String(shapeId))
        : String(shapeId).replace(/[^A-Za-z0-9_-]/g, '');
      const countdown = root.querySelector(`[data-pptx-countdown-shape-id="${escaped}"]`);
      return countdown instanceof HTMLButtonElement ? countdown : null;
    }

    function wpPowerPointCountdownTone() {
      const AudioContextClass = window.AudioContext || window.webkitAudioContext;
      if (!AudioContextClass) return;
      try {
        const context = new AudioContextClass();
        const oscillator = context.createOscillator();
        const gain = context.createGain();
        oscillator.type = 'sine';
        oscillator.frequency.value = 880;
        gain.gain.setValueAtTime(.0001, context.currentTime);
        gain.gain.exponentialRampToValueAtTime(.16, context.currentTime + .015);
        gain.gain.exponentialRampToValueAtTime(.0001, context.currentTime + .22);
        oscillator.connect(gain);
        gain.connect(context.destination);
        oscillator.start();
        oscillator.stop(context.currentTime + .24);
        oscillator.addEventListener('ended', () => context.close().catch(() => {}), { once: true });
      } catch (_) {}
    }

    function wpUpdatePowerPointCountdown(countdown, remaining) {
      if (!(countdown instanceof HTMLButtonElement)) return;
      const safeRemaining = Math.max(0, Number(remaining) || 0);
      countdown.dataset.pptxCountdownRemaining = String(safeRemaining);
      const value = countdown.querySelector('.pptx-native-countdown-value');
      if (value) value.textContent = String(Math.max(0, Math.ceil(safeRemaining)));
      countdown.classList.toggle('is-ending', safeRemaining > 0 && safeRemaining <= 10);
      countdown.setAttribute('aria-label', safeRemaining > 0
        ? `Đồng hồ còn ${Math.ceil(safeRemaining)} giây. Bấm để tạm dừng hoặc tiếp tục.`
        : 'Đồng hồ đã hết giờ. Bấm để chạy lại.');
    }

    function wpRunPowerPointCountdownCommand(shapeId, command = 'playFrom(0.0)') {
      const countdown = wpPowerPointCountdownElement(shapeId);
      if (!(countdown instanceof HTMLButtonElement)) return false;
      const normalized = String(command || 'playFrom(0.0)').trim().toLowerCase();
      const total = Math.max(1, Number(countdown.dataset.pptxCountdownTotal) || 60);
      const clearTimer = () => {
        const timerId = Number(countdown.dataset.pptxCountdownTimer) || 0;
        if (timerId) clearInterval(timerId);
        countdown.dataset.pptxCountdownTimer = '';
        countdown.dataset.pptxCountdownRunning = 'false';
        countdown.classList.remove('is-running');
      };
      if (/stop/.test(normalized)) {
        clearTimer();
        wpUpdatePowerPointCountdown(countdown, total);
        return true;
      }
      const running = countdown.dataset.pptxCountdownRunning === 'true';
      if (normalized.includes('togglepause') && running) {
        clearTimer();
        return true;
      }
      if (/pause/.test(normalized) && !/play/.test(normalized) && !normalized.includes('togglepause')) {
        clearTimer();
        return true;
      }
      let remaining = Math.max(0, Number(countdown.dataset.pptxCountdownRemaining) || 0);
      const playMatch = normalized.match(/playfrom\s*\(\s*([0-9.]+)\s*\)/i);
      if (playMatch) remaining = Math.max(0, total - (Number(playMatch[1]) || 0));
      if (!(remaining > 0)) remaining = total;
      clearTimer();
      wpUpdatePowerPointCountdown(countdown, remaining);
      countdown.dataset.pptxCountdownRunning = 'true';
      countdown.classList.add('is-running');
      let previousTime = performance.now();
      const timerId = window.setInterval(() => {
        const now = performance.now();
        remaining = Math.max(0, remaining - ((now - previousTime) / 1000));
        previousTime = now;
        wpUpdatePowerPointCountdown(countdown, remaining);
        if (remaining > 0) return;
        clearTimer();
        wpPowerPointCountdownTone();
      }, 125);
      countdown.dataset.pptxCountdownTimer = String(timerId);
      return true;
    }

    function wpRunPowerPointMediaCommand(shapeId, command = 'playFrom(0.0)') {
      const media = wpPowerPointMediaElement(shapeId);
      const normalized = String(command || 'playFrom(0.0)').trim().toLowerCase();
      if (!(media instanceof HTMLMediaElement)) {
        return wpRunPowerPointCountdownCommand(shapeId, normalized);
      }
      const unlockedAudio = media.dataset.pptxUnlockedAudio === 'true';
      const attemptPlay = () => {
        const configuredStart = Math.max(0, Number(media.dataset.pptxStartSeconds) || 0);
        if (unlockedAudio && wpPlayPowerPointUnlockedAudio(media, configuredStart)) return;
        const pending = media.play();
        if (pending && typeof pending.then === 'function') {
          pending.then(() => {
            media.dataset.pptxPendingPlay = 'false';
          }).catch(() => {
            media.dataset.pptxPendingPlay = 'true';
          });
        }
      };
      const playMatch = normalized.match(/playfrom\s*\(\s*([0-9.]+)\s*\)/i);
      if (/stop/.test(normalized)) {
        if (unlockedAudio) wpStopPowerPointUnlockedAudio(shapeId);
        try {
          media.pause();
          media.currentTime = Math.max(0, Number(media.dataset.pptxStartSeconds) || 0);
        } catch (_) {}
        return true;
      }
      if (/pause/.test(normalized) && !/play/.test(normalized)) {
        if (normalized.includes('togglepause')) {
          if (unlockedAudio && wpOrdinaryState.pptxAudioSourceNodes.has(String(shapeId || ''))) {
            wpStopPowerPointUnlockedAudio(shapeId);
          } else if (media.paused || media.ended) {
            attemptPlay();
          } else {
            try { media.pause(); } catch (_) {}
          }
          return true;
        }
        if (unlockedAudio) wpStopPowerPointUnlockedAudio(shapeId);
        try { media.pause(); } catch (_) {}
        return true;
      }
      const requestedStart = playMatch ? Math.max(0, Number(playMatch[1]) || 0) : null;
      const configuredStart = Math.max(0, Number(media.dataset.pptxStartSeconds) || 0);
      const startSeconds = requestedStart == null ? configuredStart : requestedStart;
      try {
        if (startSeconds > 0 || media.ended) media.currentTime = startSeconds;
      } catch (_) {}
      if (unlockedAudio && wpPlayPowerPointUnlockedAudio(media, startSeconds)) return true;
      attemptPlay();
      return true;
    }

    function wpPowerPointCssColor(color) {
      const kind = String(color && color.kind || '');
      const value = String(color && color.value || '').trim();
      if (!value) return '';
      if (kind === 'srgbClr' || kind === 'sysClr') {
        const compact = value.replace(/^#/, '');
        return /^[0-9a-f]{6}$/i.test(compact) ? `#${compact}` : '';
      }
      if (kind === 'prstClr' && /^[a-z]+$/i.test(value)) return value;
      return '';
    }

    function wpPowerPointTranslucentColor(cssColor, alpha = .30) {
      const compact = String(cssColor || '').replace(/^#/, '').trim();
      if (!/^[0-9a-f]{6}$/i.test(compact)) return cssColor;
      const red = Number.parseInt(compact.slice(0, 2), 16);
      const green = Number.parseInt(compact.slice(2, 4), 16);
      const blue = Number.parseInt(compact.slice(4, 6), 16);
      return `rgba(${red}, ${green}, ${blue}, ${Math.max(.12, Math.min(.7, Number(alpha) || .30))})`;
    }

    /* PowerPoint emphasis animClr(fillcolor) is a *persistent, opaque* shape
       fill.  Do not apply the older 30% highlight opacity to this action. */
    function wpApplyPowerPointShapeColor(slideElement, shapeId, color, options = {}) {
      const taggedHost = wpPowerPointShapeHost(slideElement, shapeId);
      const fallbackHost = wpPowerPointFallbackShapeHost(slideElement, shapeId);
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const sourceBounds = options && options.targetBounds;
      const taggedScore = sourceBounds
        ? wpPowerPointShapeBoundsScore(slideElement, taggedHost, sourceBounds, plan.slideSize)
        : 0;
      /* Native OOXML may contain the same ID in Choice and Fallback.  A
         source-space match is safer than blindly painting a stale ID tag. */
      const host = sourceBounds && (!(taggedHost instanceof HTMLElement) || taggedScore > .07)
        ? (wpPowerPointShapeHostByBounds(slideElement, sourceBounds, plan.slideSize) || taggedHost)
        : taggedHost;
      const cssColor = wpPowerPointCssColor(color);
      if ((!host && !fallbackHost) || !cssColor) return false;
      const opaqueFill = !!(options && options.opaqueFill);
      const displayedColor = opaqueFill ? cssColor : wpPowerPointTranslucentColor(cssColor, .30);
      const displayedOpacity = opaqueFill ? '1' : '.30';
      let painted = false;
      if (host) {
        host.dataset.pptxAppliedFill = cssColor;
        if (opaqueFill) {
          /* A color-emphasis action should repaint the background even when
             the renderer represents a rounded answer box by nested SVG/HTML.
             Multiply is deliberately above that white surface: white takes
             the exact target color while dark letters/borders stay legible.
             This is reversible when the slide DOM is recreated. */
          let overlay = Array.from(host.children).find((child) => child instanceof HTMLElement
            && child.classList.contains('pptx-native-opaque-color-layer'));
          if (!overlay) {
            overlay = document.createElement('div');
            overlay.className = 'pptx-native-opaque-color-layer';
            overlay.setAttribute('aria-hidden', 'true');
            overlay.style.cssText = [
              'position:absolute', 'inset:0', 'pointer-events:none',
              'mix-blend-mode:multiply', 'z-index:2147483000',
              'border-radius:7% / 9%',
            ].join(';');
            host.appendChild(overlay);
          }
          overlay.style.setProperty('background-color', cssColor, 'important');
          overlay.style.setProperty('opacity', '1', 'important');
          painted = true;
        } else {
          host.querySelectorAll('svg path, svg rect, svg ellipse, svg circle, svg polygon').forEach((shape) => {
            const fill = String(shape.getAttribute('fill') || '').trim().toLowerCase();
            const inlineFill = String(shape.style && shape.style.fill || '').trim().toLowerCase();
            if (fill === 'none' && (!inlineFill || inlineFill === 'none')) return;
            shape.setAttribute('fill', cssColor);
            shape.setAttribute('fill-opacity', displayedOpacity);
            if (shape.style) {
              shape.style.fill = cssColor;
              shape.style.fillOpacity = displayedOpacity;
            }
            painted = true;
          });
          if (!painted) {
            host.style.setProperty('background-color', displayedColor, 'important');
            painted = true;
          }
        }
      }
      if (fallbackHost) {
        fallbackHost.dataset.pptxAppliedFill = cssColor;
        fallbackHost.style.setProperty('background-color', displayedColor, 'important');
        painted = true;
      }
      return painted;
    }

    function wpPowerPointActionHosts(slideElement, shapeId) {
      const hosts = [];
      const host = wpPowerPointShapeHost(slideElement, shapeId);
      const fallbackHost = wpPowerPointFallbackShapeHost(slideElement, shapeId);
      if (host) hosts.push(host);
      if (fallbackHost && fallbackHost !== host) hosts.push(fallbackHost);
      return hosts;
    }

    function wpApplyPowerPointSetAction(slideElement, action) {
      const hosts = wpPowerPointActionHosts(slideElement, action && action.targetShapeId);
      if (!hosts.length) return false;
      const attributeName = String(action.attributeName || '').toLowerCase();
      const value = String(action.value || '').toLowerCase();
      hosts.forEach((host) => {
        if (attributeName.includes('visibility')) {
          const visible = !['hidden', 'false', '0'].includes(value);
          host.style.visibility = visible ? 'visible' : 'hidden';
          host.style.opacity = visible ? '1' : '0';
        } else if (attributeName === 'fill.on' && ['false', '0'].includes(value)) {
          host.style.setProperty('background-color', 'transparent', 'important');
        }
      });
      return true;
    }

    function wpRunPowerPointElementAnimation(slideElement, action) {
      const elements = wpPowerPointActionHosts(slideElement, action && action.targetShapeId);
      if (!elements.length) return false;
      const effect = {
        presetClass: String(action.presetClass || '').toLowerCase(),
        presetId: Number(action.presetId) || 0,
        presetSubtype: String(action.presetSubtype || '').toLowerCase(),
        repeatIndefinitely: !!action.repeatIndefinitely,
      };
      elements.forEach((element) => {
        if (effect.presetClass === 'entr') {
          element.style.removeProperty('display');
          element.style.visibility = 'visible';
          element.style.opacity = '0';
          element.setAttribute('aria-hidden', 'false');
        }
        const finish = () => {
          if (effect.presetClass === 'exit') {
            element.style.visibility = 'hidden';
            element.style.opacity = '0';
          } else {
            element.style.visibility = 'visible';
            element.style.opacity = '1';
          }
        };
        if (typeof element.animate !== 'function') {
          finish();
          return;
        }
        if (effect.presetClass === 'emph' && effect.repeatIndefinitely) {
          element.getAnimations().forEach((animation) => {
            try { animation.cancel(); } catch (_) {}
          });
          element.animate([
            { opacity: 1, filter: 'brightness(1) saturate(1)' },
            { opacity: .10, filter: 'brightness(1.9) saturate(1.45)' },
            { opacity: 1, filter: 'brightness(1) saturate(1)' },
          ], {
            duration: 900,
            iterations: Infinity,
            easing: 'ease-in-out',
          });
          return;
        }
        const animation = element.animate(wpPptxBuildKeyframes(effect, element), {
          duration: Math.max(80, Number(action.duration) || 520),
          easing: effect.presetClass === 'emph' ? 'ease-in-out' : 'ease-out',
          fill: 'forwards',
        });
        animation.addEventListener('finish', () => {
          finish();
          try { animation.cancel(); } catch (_) {}
        }, { once: true });
      });
      return true;
    }

    function wpRunPowerPointHtmlSound(action) {
      const sourceUrl = String(action && action.sourceUrl || '').trim();
      if (!sourceUrl) return false;
      const root = wpOrdinaryState.pptxRoot;
      if (!(root instanceof HTMLElement)) return false;
      const audio = document.createElement('audio');
      audio.className = 'pptx-native-audio pptx-native-trigger-audio';
      audio.preload = 'auto';
      const source = document.createElement('source');
      source.src = sourceUrl;
      source.type = action.mimeType || 'audio/wav';
      audio.appendChild(source);
      audio.addEventListener('ended', () => audio.remove(), { once: true });
      audio.addEventListener('error', () => audio.remove(), { once: true });
      root.appendChild(audio);
      const pending = audio.play();
      if (pending && typeof pending.catch === 'function') {
        pending.catch(() => audio.remove());
      }
      return true;
    }

    function wpRunPowerPointSoundAction(action) {
      const sourceUrl = String(action && action.sourceUrl || '').trim();
      if (!sourceUrl) return false;
      const isWave = /audio\/wav/i.test(String(action && action.mimeType || ''))
        || /\.wav$/i.test(String(action && action.mediaPath || ''));
      const AudioContextClass = window.AudioContext || window.webkitAudioContext;
      if (!isWave || !AudioContextClass) return wpRunPowerPointHtmlSound(action);
      let context;
      try {
        context = new AudioContextClass();
      } catch (_) {
        return wpRunPowerPointHtmlSound(action);
      }
      const fallback = () => {
        try { context.close(); } catch (_) {}
        wpRunPowerPointHtmlSound(action);
      };
      Promise.resolve(typeof context.resume === 'function' ? context.resume() : undefined)
        .then(async () => {
          let buffer = wpOrdinaryState.pptxDecodedSoundBuffers.get(sourceUrl) || null;
          if (!buffer) {
            const response = await fetch(sourceUrl);
            if (!response.ok) throw new Error('Không đọc được âm thanh WAV trong PowerPoint.');
            buffer = await context.decodeAudioData(await response.arrayBuffer());
            wpOrdinaryState.pptxDecodedSoundBuffers.set(sourceUrl, buffer);
          }
          const source = context.createBufferSource();
          const gain = context.createGain();
          gain.gain.value = 1;
          source.buffer = buffer;
          source.connect(gain);
          gain.connect(context.destination);
          source.addEventListener('ended', () => {
            try { context.close(); } catch (_) {}
          }, { once: true });
          source.start(0);
        })
        .catch(fallback);
      return true;
    }

    function wpShowPowerPointToast(message, duration = 2600) {
      const slideElement = wpPptxSlideDomElement();
      if (!(slideElement instanceof HTMLElement) || !message) return false;
      slideElement.querySelectorAll('.pptx-native-toast').forEach((toast) => toast.remove());
      const toast = document.createElement('div');
      toast.className = 'pptx-native-toast';
      toast.setAttribute('role', 'status');
      toast.textContent = String(message);
      slideElement.appendChild(toast);
      window.setTimeout(() => {
        if (toast.isConnected) toast.remove();
      }, Math.max(800, Number(duration) || 2600));
      return true;
    }

    function wpPowerPointTriggerColorValue(trigger) {
      const colorAction = (Array.isArray(trigger && trigger.actions) ? trigger.actions : [])
        .find((action) => action && action.type === 'color' && action.color && action.color.value);
      return String(colorAction && colorAction.color.value || '').replace(/^#/, '').toUpperCase();
    }

    function wpPowerPointColorIsGreen(value) {
      const compact = String(value || '').replace(/^#/, '');
      if (!/^[0-9A-F]{6}$/i.test(compact)) return false;
      const red = Number.parseInt(compact.slice(0, 2), 16);
      const green = Number.parseInt(compact.slice(2, 4), 16);
      const blue = Number.parseInt(compact.slice(4, 6), 16);
      return green > red * 1.2 && green > blue * 1.12;
    }

    function wpPowerPointColorIsRed(value) {
      const compact = String(value || '').replace(/^#/, '');
      if (!/^[0-9A-F]{6}$/i.test(compact)) return false;
      const red = Number.parseInt(compact.slice(0, 2), 16);
      const green = Number.parseInt(compact.slice(2, 4), 16);
      const blue = Number.parseInt(compact.slice(4, 6), 16);
      return red > green * 1.2 && red > blue * 1.12;
    }

    function wpPowerPointAnswerTriggers(plan) {
      return (Array.isArray(plan && plan.triggers) ? plan.triggers : [])
        .filter((trigger) => !!wpPowerPointTriggerColorValue(trigger));
    }

    function wpPowerPointAnswerLabel(trigger) {
      const text = String(trigger && trigger.shapeText || '').replace(/\s+/g, ' ').trim();
      const match = text.match(/(?:^|\s)([ABCD])(?:\s|[.):\-]|$)/i);
      return match ? match[1].toUpperCase() : '';
    }

    function wpPowerPointCorrectAnswerTrigger(plan) {
      return wpPowerPointAnswerTriggers(plan)
        .find((trigger) => wpPowerPointColorIsGreen(wpPowerPointTriggerColorValue(trigger))) || null;
    }

    function wpRunPowerPointMacroAction(macroName, link) {
      const normalized = String(macroName || '').replace(/[^a-z0-9]/gi, '').toLowerCase();
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const slideElement = wpPptxSlideDomElement();
      const triggers = Array.isArray(plan.triggers) ? plan.triggers : [];
      const answerTriggers = wpPowerPointAnswerTriggers(plan);
      const correctTrigger = wpPowerPointCorrectAnswerTrigger(plan);
      const runCorrectAnswer = (message = 'Đã hiển thị đáp án đúng.') => {
        if (!correctTrigger || !(slideElement instanceof HTMLElement)) {
          wpShowPowerPointToast('Slide này không có dữ liệu đáp án để hiển thị.');
          return true;
        }
        wpRunPowerPointInteractiveTrigger(slideElement, correctTrigger);
        const label = wpPowerPointAnswerLabel(correctTrigger);
        wpShowPowerPointToast(label ? `${message} Phương án ${label}.` : message);
        return true;
      };

      if (normalized === 'nextquestion') {
        const nextIndex = wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageIndex + 1);
        if (nextIndex >= 0) {
          void wpRenderPowerPointSlide(nextIndex, 1);
        } else {
          wpShowPowerPointToast('Đã đến trang chiếu cuối cùng.');
        }
        return true;
      }
      if (normalized === 'viewend') {
        void wpClosePresenter();
        return true;
      }
      if (normalized === 'showanswers') {
        answerTriggers.forEach((trigger) => {
          const hosts = slideElement instanceof HTMLElement
            ? wpPowerPointActionHosts(slideElement, trigger.triggerShapeId)
            : [];
          hosts.forEach((host) => {
            host.style.visibility = 'visible';
            host.style.opacity = '1';
          });
        });
        wpShowPowerPointToast(answerTriggers.length
          ? 'Các phương án đã sẵn sàng.'
          : 'Slide này không có nhóm phương án tương tác.');
        return true;
      }
      if (normalized === 'viewcorrectanswer') return runCorrectAnswer();
      if (normalized === 'startfastestfinger' || normalized === 'startphonetimer') {
        const matchingTrigger = triggers.find((trigger) => String(trigger.triggerShapeId) === String(link && link.shapeId)
          && (trigger.actions || []).some((action) => action.type === 'media'));
        if (matchingTrigger && slideElement instanceof HTMLElement) {
          wpRunPowerPointInteractiveTrigger(slideElement, matchingTrigger);
          return true;
        }
        const video = (Array.isArray(plan.videos) ? plan.videos : [])[0];
        if (video && wpRunPowerPointMediaCommand(video.shapeId, 'togglePause')) return true;
        wpShowPowerPointToast('Slide này không có đồng hồ đếm ngược.');
        return true;
      }
      if (normalized === 'endlifeline') {
        wpStopPowerPointMedia();
        wpShowPowerPointToast('Đã dừng đồng hồ và âm thanh.');
        return true;
      }
      if (normalized === 'fiftyfifty' || normalized === 'doubledip') {
        const matchingTrigger = triggers.find((trigger) => String(trigger.triggerShapeId) === String(link && link.shapeId)
          && (trigger.actions || []).some((action) => action.type === 'animation' && action.presetClass === 'exit'));
        if (matchingTrigger && slideElement instanceof HTMLElement) {
          wpRunPowerPointInteractiveTrigger(slideElement, matchingTrigger);
          wpShowPowerPointToast('Đã loại hai phương án sai.');
          return true;
        }
        const wrongAnswers = answerTriggers.filter((trigger) => wpPowerPointColorIsRed(wpPowerPointTriggerColorValue(trigger)));
        let hiddenCount = 0;
        wrongAnswers.slice(0, 2).forEach((trigger) => {
          const hosts = slideElement instanceof HTMLElement
            ? wpPowerPointActionHosts(slideElement, trigger.triggerShapeId)
            : [];
          if (hosts.length) hiddenCount += 1;
          hosts.forEach((host) => {
            host.style.visibility = 'hidden';
            host.style.opacity = '0';
          });
        });
        wpShowPowerPointToast(hiddenCount
          ? 'Đã loại hai phương án sai.'
          : 'Trợ giúp này chưa có dữ liệu phương án trên slide hiện tại.');
        return true;
      }
      if (normalized === 'askaudience') return runCorrectAnswer('Khán giả nghiêng về đáp án đúng.');
      if (normalized === 'phonefriend') return runCorrectAnswer('Gợi ý của người thân:');
      if (normalized === 'plusone') return runCorrectAnswer('Người đồng hành chọn:');
      if (normalized === 'finalanswer') {
        const shapeText = String(link && (link.shapeText || link.label) || '').trim().toLowerCase();
        if (/\bno\b|không/.test(shapeText)) {
          wpOrdinaryState.pptxSelectedTriggerShapeId = '';
          wpShowPowerPointToast('Bạn có thể chọn lại phương án.');
          return true;
        }
        const selected = answerTriggers.find((trigger) => String(trigger.triggerShapeId)
          === String(wpOrdinaryState.pptxSelectedTriggerShapeId));
        if (selected && slideElement instanceof HTMLElement) {
          wpRunPowerPointInteractiveTrigger(slideElement, selected);
          wpShowPowerPointToast('Đã chốt phương án cuối cùng.');
        } else {
          wpShowPowerPointToast('Hãy chọn một phương án trước khi chốt.');
        }
        return true;
      }
      wpShowPowerPointToast(`Lệnh “${macroName}” không có mã macro trong tệp PPTX.`);
      return true;
    }

    function wpRunPowerPointActionList(slideElement, actions) {
      if (!(slideElement instanceof HTMLElement)) return false;
      let handled = false;
      (Array.isArray(actions) ? actions : []).forEach((action) => {
        if (!action) return;
        if (action.type === 'media') {
          handled = wpRunPowerPointMediaCommand(action.targetShapeId, action.command) || handled;
        } else if (action.type === 'color') {
          const attribute = String(action.attributeName || '').toLowerCase();
          handled = wpApplyPowerPointShapeColor(slideElement, action.targetShapeId, action.color,
            { opaqueFill: attribute === 'fillcolor' || attribute === 'fill.color',
              targetBounds: action.targetBounds }) || handled;
        } else if (action.type === 'set') {
          handled = wpApplyPowerPointSetAction(slideElement, action) || handled;
        } else if (action.type === 'animation') {
          handled = wpRunPowerPointElementAnimation(slideElement, action) || handled;
        } else if (action.type === 'sound') {
          handled = wpRunPowerPointSoundAction(action) || handled;
        }
      });
      return handled;
    }

    function wpRunPowerPointPrizeEffect(slideElement) {
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const groups = Array.isArray(plan.groups) ? plan.groups : [];
      const effects = groups.flat();
      const prizeEffect = effects.find((effect) => effect && effect.repeatIndefinitely
        && /^\s*\$/.test(String(effect.shapeText || ''))
        && (Array.isArray(effect.actions) ? effect.actions : [])
          .some((action) => action && action.type === 'color'));
      if (!prizeEffect) return false;
      wpPowerPointInteractionHost(slideElement, {
        shapeId: prizeEffect.nodeId,
        bounds: prizeEffect.bounds,
      }, { ...plan, coordinateHitAreas: true });
      const groupIndex = groups.findIndex((group) => (Array.isArray(group) ? group : [])
        .some((effect) => effect === prizeEffect
          || (effect && String(effect.nodeId) === String(prizeEffect.nodeId))));
      const prizeGroup = groupIndex >= 0 ? groups[groupIndex] : [prizeEffect];
      let handled = false;
      prizeGroup.forEach((effect) => {
        if (!effect) return;
        if (effect.presetClass === 'mediacall') {
          handled = wpRunPowerPointMediaCommand(effect.nodeId, effect.command) || handled;
          return;
        }
        handled = wpRunPowerPointActionList(slideElement, effect.actions) || handled;
      });
      if (groupIndex >= 0) {
        wpOrdinaryState.pptxBuildIndex = Math.max(wpOrdinaryState.pptxBuildIndex, groupIndex + 1);
      }
      return handled;
    }

    function wpEnablePowerPointPendingAudioResume(slideElement) {
      if (!(slideElement instanceof HTMLElement)
        || slideElement.dataset.pptxPendingAudioResumeBound === 'true') return;
      slideElement.dataset.pptxPendingAudioResumeBound = 'true';
      const resumePendingAudio = () => {
        wpPrimePowerPointAudio();
        const root = wpOrdinaryState.pptxRoot;
        if (!(root instanceof HTMLElement)) return;
        root.querySelectorAll('audio.pptx-native-audio[data-pptx-pending-play="true"]')
          .forEach((audio) => {
            if (audio.dataset.pptxUnlockedAudio === 'true'
              && wpPlayPowerPointUnlockedAudio(audio, Number(audio.dataset.pptxStartSeconds) || 0)) return;
            const pending = audio.play();
            if (pending && typeof pending.then === 'function') {
              pending.then(() => {
                audio.dataset.pptxPendingPlay = 'false';
              }).catch(() => {});
            }
          });
      };
      slideElement.addEventListener('pointerdown', resumePendingAudio, true);
      slideElement.addEventListener('keydown', resumePendingAudio, true);
    }

    function wpStartPowerPointPrizeIntro(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement)
        || slideElement.dataset.pptxPrizeIntroStarted === 'true') return false;
      const hasPrizeIntro = (Array.isArray(plan && plan.groups) ? plan.groups : [])
        .some((group) => (Array.isArray(group) ? group : []).some((effect) => effect
          && effect.repeatIndefinitely && /^\s*\$/.test(String(effect.shapeText || ''))));
      if (!hasPrizeIntro) return false;
      slideElement.dataset.pptxPrizeIntroStarted = 'true';
      const slideIndex = wpOrdinaryState.pageIndex;
      requestAnimationFrame(() => {
        if (!slideElement.isConnected || wpOrdinaryState.kind !== 'pptx-slide'
          || wpOrdinaryState.pageIndex !== slideIndex) return;
        wpRunPowerPointPrizeEffect(slideElement);
        wpSyncOrdinaryPageUi();
      });
      return true;
    }

    function wpRunPowerPointInteractiveTrigger(slideElement, trigger) {
      if (!(slideElement instanceof HTMLElement) || !trigger) return false;
      const actions = Array.isArray(trigger.actions) ? trigger.actions : [];
      let handled = wpRunPowerPointActionList(slideElement, actions);
      if (actions.some((action) => action && action.type === 'color')) {
        wpOrdinaryState.pptxSelectedTriggerShapeId = String(trigger.triggerShapeId || '');
      }
      const answerColor = wpPowerPointTriggerColorValue(trigger);
      if (wpPowerPointColorIsGreen(answerColor)) {
        handled = wpRunPowerPointPrizeEffect(slideElement) || handled;
      }
      return handled;
    }

    function wpRunPowerPointLinkAction(link) {
      const slideIndex = Number(link && link.slideIndex);
      if (Number.isInteger(slideIndex) && slideIndex >= 0 && slideIndex < wpOrdinaryState.pageCount) {
        void wpRenderPowerPointSlide(slideIndex, slideIndex < wpOrdinaryState.pageIndex ? -1 : 1);
        return true;
      }
      const rawAction = String(link && link.action || '');
      const macroMatch = rawAction.match(/[?&]name=([^&]+)/i);
      if (/^ppaction:\/\/macro/i.test(rawAction) && macroMatch) {
        let macroName = macroMatch[1];
        try { macroName = decodeURIComponent(macroName); } catch (_) {}
        return wpRunPowerPointMacroAction(macroName, link);
      }
      const action = rawAction.toLowerCase();
      const jumpMatch = action.match(/[?&]jump=([^&]+)/);
      const jump = jumpMatch ? decodeURIComponent(jumpMatch[1]) : '';
      if (jump === 'nextslide') return wpAdvancePowerPointPresentation(1);
      if (jump === 'previousslide' || jump === 'prevslide') return wpAdvancePowerPointPresentation(-1);
      if (jump === 'firstslide') {
        void wpRenderPowerPointSlide(wpPowerPointVisibleSlideIndex(0), -1);
        return true;
      }
      if (jump === 'lastslide') {
        void wpRenderPowerPointSlide(wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageCount - 1, -1), 1);
        return true;
      }
      if (jump === 'endshow') {
        void wpClosePresenter();
        return true;
      }
      return false;
    }


    function wpMountNativePowerPointVideo(host, entry, sourceUrl, sourceMime = '') {
      if (!(host instanceof HTMLElement) || !sourceUrl) return null;
      Array.from(host.children).forEach((child) => {
        if (child.classList && (child.classList.contains('pptx-native-video')
          || child.classList.contains('pptx-native-countdown')
          || child.classList.contains('pptx-local-video-status'))) child.remove();
      });
      const video = document.createElement('video');
      video.className = 'pptx-native-video';
      video.dataset.pptxMediaShapeId = String(entry.shapeId || '');
      video.dataset.pptxStartSeconds = String(Math.max(0, Number(entry.startSeconds) || 0));
      video.controls = true;
      video.preload = 'metadata';
      video.playsInline = true;
      video.setAttribute('playsinline', '');
      video.setAttribute('aria-label', 'Video trong trang chiếu PowerPoint');
      if (entry.posterUrl) video.poster = entry.posterUrl;
      const source = document.createElement('source');
      source.src = sourceUrl;
      source.type = sourceMime || entry.mimeType || 'video/mp4';
      video.appendChild(source);
      const startSeconds = Math.max(0, Number(entry.startSeconds) || 0);
      const endSeconds = Math.max(0, Number(entry.endSeconds) || 0);
      const seekToStart = () => {
        if (!(startSeconds > 0) || !Number.isFinite(video.duration)) return;
        if (video.currentTime < startSeconds - .15) {
          try { video.currentTime = Math.min(startSeconds, Math.max(0, video.duration - .05)); } catch (_) {}
        }
      };
      video.addEventListener('loadedmetadata', seekToStart);
      video.addEventListener('play', seekToStart);
      if (endSeconds > startSeconds) {
        video.addEventListener('timeupdate', () => {
          if (video.currentTime < endSeconds) return;
          video.pause();
          try { video.currentTime = startSeconds; } catch (_) {}
        });
      }
      ['click', 'dblclick', 'pointerdown', 'pointerup', 'touchstart', 'touchend']
        .forEach((type) => video.addEventListener(type, (event) => event.stopPropagation()));
      host.appendChild(video);
      return video;
    }

    function wpAttachLocalLegacyVideo(host, entry) {
      if (!(host instanceof HTMLElement)) return;
      const renderReady = (ready) => {
        if (!ready || !ready.url || !host.isConnected) return;
        entry.localReadySource = ready;
        wpMountNativePowerPointVideo(host, entry, ready.url, ready.mimeType || 'video/mp4');
      };
      if (entry.localReadySource && entry.localReadySource.url) {
        renderReady(entry.localReadySource);
        return;
      }
      const state = entry.localTranscodeState || { status:'queued', progress:0 };
      const status = document.createElement('div');
      status.className = 'pptx-local-video-status';
      status.innerHTML = '<span class="pptx-local-video-spinner" aria-hidden="true"></span><strong></strong><small>Video được xử lý trên máy này, không tải lên máy chủ.</small>';
      const text = status.querySelector('strong');
      const syncStatus = () => {
        if (text) text.textContent = wpLocalVideoStatusText(state);
        status.classList.toggle('is-error', state.status === 'error');
      };
      syncStatus();
      host.appendChild(status);
      const timer = setInterval(() => {
        if (!status.isConnected || state.status === 'ready' || state.status === 'error') {
          clearInterval(timer); return;
        }
        syncStatus();
      }, 300);
      const promise = entry.localSourcePromise;
      if (!promise || typeof promise.then !== 'function') {
        state.status = 'error'; state.error = 'Không có tác vụ chuẩn bị video.'; syncStatus();
        return;
      }
      promise.then((ready) => {
        clearInterval(timer);
        renderReady(ready);
      }).catch((error) => {
        clearInterval(timer);
        state.status = 'error';
        if (!state.error) state.error = error && error.message ? error.message : 'Không chuyển được video.';
        syncStatus();
      });
    }

    function wpActivateCurrentPowerPointInteractions(slideElement) {
      if (!(slideElement instanceof HTMLElement) || wpOrdinaryState.kind !== 'pptx-slide') return;
      wpClearPowerPointImageZoom(slideElement);
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const videos = Array.isArray(plan.videos) ? plan.videos : [];
      const audios = Array.isArray(plan.audios) ? plan.audios : [];
      const links = Array.isArray(plan.links) ? plan.links : [];
      const triggers = Array.isArray(plan.triggers) ? plan.triggers : [];

      videos.forEach((entry) => {
        const host = wpPowerPointInteractionHost(slideElement, entry, plan);
        if (!host) return;
        host.classList.add('pptx-native-video-host');
        Array.from(host.children).forEach((child) => {
          if (child.classList && (child.classList.contains('pptx-native-video')
            || child.classList.contains('pptx-native-countdown')
            || child.classList.contains('pptx-local-video-status'))) child.remove();
        });
        const legacyVideo = !!entry.localLegacyVideo
          || wpPptxLegacyBrowserVideo(entry.mediaPath, entry.mimeType);
        if (legacyVideo) {
          host.classList.remove('pptx-native-countdown-host');
          wpAttachLocalLegacyVideo(host, entry);
          return;
        }
        wpMountNativePowerPointVideo(host, entry, entry.sourceUrl, entry.mimeType || 'video/mp4');
      });

      audios.forEach((entry) => {
        const host = wpPowerPointInteractionHost(slideElement, entry, plan)
          || wpPowerPointDetachedAudioHost(slideElement, entry.shapeId);
        if (!host) return;
        host.classList.add('pptx-native-audio-host');
        Array.from(host.children).forEach((child) => {
          if (child.classList && (child.classList.contains('pptx-native-audio')
            || child.classList.contains('pptx-native-media-overlay'))) child.remove();
        });
        const audio = document.createElement('audio');
        audio.className = 'pptx-native-audio';
        audio.dataset.pptxMediaShapeId = String(entry.shapeId || '');
        audio.dataset.pptxStartSeconds = String(Math.max(0, Number(entry.startSeconds) || 0));
        audio.preload = 'auto';
        const source = document.createElement('source');
        const compatibleSource = wpPowerPointCompatibleAudioSource(entry);
        const usesUnlockedAudio = compatibleSource === WP_PPTX_MILLIONAIRE_INTRO_SOUND
          || compatibleSource === WP_PPTX_MILLIONAIRE_PRIZE_SOUND;
        audio.dataset.pptxUnlockedAudio = usesUnlockedAudio ? 'true' : 'false';
        audio.dataset.pptxCompatibleSource = compatibleSource;
        audio.dataset.pptxVolume = compatibleSource === WP_PPTX_MILLIONAIRE_INTRO_SOUND ? '.62' : '.72';
        source.src = compatibleSource;
        source.type = usesUnlockedAudio
          ? 'audio/mpeg'
          : (entry.mimeType || 'audio/mpeg');
        audio.appendChild(source);
        const startSeconds = Math.max(0, Number(entry.startSeconds) || 0);
        const endSeconds = Math.max(0, Number(entry.endSeconds) || 0);
        if (endSeconds > startSeconds) {
          audio.addEventListener('timeupdate', () => {
            if (audio.currentTime < endSeconds) return;
            audio.pause();
            try { audio.currentTime = startSeconds; } catch (_) {}
          });
        }
        host.appendChild(audio);
        if (entry.clickToPlay) {
          const button = document.createElement('button');
          button.type = 'button';
          button.className = 'pptx-native-media-overlay';
          button.setAttribute('aria-label', 'Phát âm thanh trong PowerPoint');
          button.title = 'Phát âm thanh';
          button.addEventListener('click', (event) => {
            event.preventDefault();
            event.stopPropagation();
            wpRunPowerPointMediaCommand(entry.shapeId, 'playFrom(0.0)');
          });
          host.appendChild(button);
        }
      });

      const clearedLinkHosts = new Set();
      const claimedNativeLinks = new Set();
      links.forEach((entry) => {
        const host = wpPowerPointInteractionHost(slideElement, entry, plan);
        if (!host || host.classList.contains('pptx-native-video-host')
          || host.classList.contains('pptx-native-audio-host')) return;
        host.classList.add('pptx-native-link-host');
        if (!clearedLinkHosts.has(host)) {
          // Renderer-owned anchors carry the source font, size and color.
          // Only unwrap anchors that MVIP itself created around plain text.
          host.querySelectorAll('.mvip-pptx-text-link:not([data-mvip-pptx-native-link])')
            .forEach(link => link.replaceWith(...link.childNodes));
          Array.from(host.children).filter(child => child.classList.contains('pptx-native-link-overlay')).forEach(child => child.remove());
          clearedLinkHosts.add(host);
        }
        const href = wpPowerPointSafeHref(entry.href);
        const makeAnchor = () => {
          const anchor = document.createElement('a');
          anchor.className = 'pptx-native-link-overlay';
          anchor.setAttribute('aria-label', entry.label || 'Mở liên kết trong PowerPoint');
          anchor.title = entry.label || href || 'Mở liên kết trong PowerPoint';
          if (href) mvipSetDocumentLink(anchor, href);
          else {
            anchor.href = '#';
            anchor.dataset.mvipInternalAction = 'pptx';
            anchor.addEventListener('click', event => {
              event.preventDefault(); event.stopPropagation();
              wpRunPowerPointLinkAction(entry);
            });
          }
          return anchor;
        };
        if (!wpPowerPointTextHyperlinks(host, entry, makeAnchor, claimedNativeLinks)) host.appendChild(makeAnchor());
      });

      triggers.forEach((entry) => {
        const host = wpPowerPointInteractionHost(slideElement, entry, plan);
        if (!host || host.classList.contains('pptx-native-video-host')
          || host.classList.contains('pptx-native-audio-host')
          || host.classList.contains('pptx-native-link-host')) return;
        host.classList.add('pptx-native-trigger-host');
        Array.from(host.children).forEach((child) => {
          if (child.classList && child.classList.contains('pptx-native-trigger-overlay')) child.remove();
        });
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'pptx-native-trigger-overlay';
        button.setAttribute('aria-label', 'Kích hoạt hiệu ứng PowerPoint');
        button.title = 'Kích hoạt hiệu ứng';
        button.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          wpRunPowerPointInteractiveTrigger(slideElement, entry);
        });
        host.appendChild(button);
      });
    }

    function wpPowerPointSlideDomFromRenderRoot(root) {
      if (!(root instanceof HTMLElement)) return null;
      const wrapper = root.firstElementChild;
      if (!(wrapper instanceof HTMLElement)) return null;
      const slide = wrapper.firstElementChild;
      return slide instanceof HTMLElement ? slide : wrapper;
    }

    function wpPptxSlideDomElement() {
      return wpPowerPointSlideDomFromRenderRoot(wpOrdinaryState.pptxRoot);
    }

    function wpClearPowerPointParagraphBuildSlices(slideElement) {
      if (!(slideElement instanceof HTMLElement)) return;
      slideElement.querySelectorAll('.pptx-native-paragraph-slice')
        .forEach((slice) => slice.remove());
      slideElement.querySelectorAll('[data-pptx-paragraph-fallback-source="true"]')
        .forEach((source) => {
          if (!(source instanceof HTMLElement)) return;
          const restore = (property, value) => {
            if (value === '__empty__') source.style.removeProperty(property);
            else source.style.setProperty(property, value || '');
          };
          restore('visibility', source.dataset.pptxParagraphSourceVisibility);
          restore('opacity', source.dataset.pptxParagraphSourceOpacity);
          const ariaHidden = source.dataset.pptxParagraphSourceAriaHidden;
          if (ariaHidden === '__missing__') source.removeAttribute('aria-hidden');
          else if (ariaHidden != null) source.setAttribute('aria-hidden', ariaHidden);
          delete source.dataset.pptxParagraphFallbackSource;
          delete source.dataset.pptxParagraphSourceVisibility;
          delete source.dataset.pptxParagraphSourceOpacity;
          delete source.dataset.pptxParagraphSourceAriaHidden;
        });
    }

    function wpTagPowerPointNodeTree(modelNode, domNode) {
      if (!modelNode || !(domNode instanceof HTMLElement)) return;
      const nodeId = String(modelNode.id == null ? '' : modelNode.id).trim();
      if (nodeId) domNode.dataset.pptxNodeId = nodeId;
      const kind = String(modelNode.nodeType || '').toLowerCase();
      const zoomKind = /^(shape|connector|line)$/.test(kind) ? 'shape'
        : /^(image|picture|chart|table|group|text|media|video|audio)$/.test(kind)
          ? (/^(video|audio)$/.test(kind) ? 'media' : kind) : '';
      if (zoomKind) domNode.dataset.cv7991PptxKind = zoomKind;
      if (modelNode.nodeType !== 'group' || !Array.isArray(modelNode.children)) return;
      const children = Array.from(domNode.children).filter((child) => child instanceof HTMLElement);
      modelNode.children.forEach((childNode, index) => wpTagPowerPointNodeTree(childNode, children[index]));
    }

    function wpTagPowerPointSlideNodes(viewer, slideIndex, slideElement) {
      const presentation = viewer && viewer.presentationData;
      const slideModel = presentation && Array.isArray(presentation.slides)
        ? presentation.slides[slideIndex]
        : null;
      const nodes = slideModel && Array.isArray(slideModel.nodes) ? slideModel.nodes : [];
      if (!(slideElement instanceof HTMLElement) || !nodes.length) return slideElement;
      if (slideElement.dataset.pptxNodeTagsSlideIndex === String(slideIndex)
        && slideElement.querySelector('[data-pptx-node-id]')) return slideElement;
      slideElement.querySelectorAll('[data-pptx-node-id]')
        .forEach((node) => node.removeAttribute('data-pptx-node-id'));
      const rendered = Array.from(slideElement.children).filter((child) => child instanceof HTMLElement
        && !child.classList.contains('pptx-native-interaction-layer')
        && !child.classList.contains('pptx-native-toast')
        && !child.classList.contains('pptx-native-trigger-audio'));
      const directNodes = rendered.slice(Math.max(0, rendered.length - nodes.length));
      nodes.forEach((node, index) => wpTagPowerPointNodeTree(node, directNodes[index]));
      slideElement.dataset.pptxNodeTagsSlideIndex = String(slideIndex);
      return slideElement;
    }

    function wpTagCurrentPowerPointSlideNodes() {
      const slideElement = wpPptxSlideDomElement();
      wpClearPowerPointParagraphBuildSlices(slideElement);
      return wpTagPowerPointSlideNodes(
        wpOrdinaryState.pptxViewer, wpOrdinaryState.pageIndex, slideElement
      );
    }

    function wpFixPowerPointWingdingsGlyphs(slideElement) {
      if (!(slideElement instanceof HTMLElement)) return 0;
      const textNodes = [];
      const walker = document.createTreeWalker(slideElement, NodeFilter.SHOW_TEXT);
      while (walker.nextNode()) {
        const node = walker.currentNode;
        if (node && /(?:q|\uf0fc)/.test(String(node.nodeValue || ''))) textNodes.push(node);
      }
      let fixed = 0;
      textNodes.forEach((textNode) => {
        const parent = textNode.parentElement;
        if (!(parent instanceof HTMLElement) || !textNode.parentNode) return;
        let fontFamily = '';
        try { fontFamily = String(getComputedStyle(parent).fontFamily || ''); } catch (_) {}
        const usesWingdings = /wingdings/i.test(fontFamily);
        const shapeScope = parent.closest('[data-pptx-node-id]') || parent.closest('div') || parent;
        const scopeText = String(shapeScope && shapeScope.textContent || '')
          .replace(/\s+/g, ' ').trim();
        const headingFallback = /^q\s*H(?:Đ|D)\s*\d+/i.test(scopeText)
          && /^\s*q\s*$/i.test(String(textNode.nodeValue || ''));
        if (!usesWingdings && !headingFallback) return;
        const source = String(textNode.nodeValue || '');
        const pattern = usesWingdings ? /(?:\uf0fc|q)/g : /q/i;
        if (!pattern.test(source)) return;
        pattern.lastIndex = 0;
        const fragment = document.createDocumentFragment();
        let cursor = 0;
        let match;
        while ((match = pattern.exec(source))) {
          if (match.index > cursor) fragment.appendChild(
            document.createTextNode(source.slice(cursor, match.index))
          );
          const symbol = document.createElement('span');
          symbol.className = 'pptx-native-symbol-glyph';
          symbol.textContent = match[0] === '\uf0fc' ? '✓' : '□';
          symbol.style.fontFamily = '"Segoe UI Symbol", "Arial Unicode MS", sans-serif';
          symbol.style.fontSize = 'inherit';
          symbol.style.fontWeight = 'inherit';
          symbol.style.fontStyle = 'normal';
          symbol.style.color = 'inherit';
          symbol.style.lineHeight = 'inherit';
          symbol.style.verticalAlign = 'baseline';
          fragment.appendChild(symbol);
          cursor = match.index + match[0].length;
          fixed += 1;
          if (!usesWingdings) break;
        }
        if (cursor < source.length) fragment.appendChild(document.createTextNode(source.slice(cursor)));
        textNode.parentNode.replaceChild(fragment, textNode);
      });
      return fixed;
    }

    function wpFixPowerPointAnswerLabelOverflow(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement)) return;
      const shapeIds = Array.isArray(plan && plan.answerLabelShapeIds)
        ? plan.answerLabelShapeIds : [];
      shapeIds.forEach((shapeId) => {
        const host = wpPowerPointShapeHost(slideElement, shapeId);
        if (!(host instanceof HTMLElement)) return;
        const revealLabel = () => {
          if (!host.isConnected) return;
          host.classList.add('pptx-native-answer-label-overflow');
          host.style.setProperty('overflow', 'visible', 'important');
          host.style.setProperty('contain', 'none', 'important');
          Array.from(host.querySelectorAll('*')).forEach((node) => {
            const text = String(node.textContent || '').replace(/\s+/g, '').toUpperCase();
            if (!/^[ABCD]$/.test(text)) return;
            if (node instanceof HTMLElement || node instanceof SVGElement) {
              node.style.setProperty('overflow', 'visible', 'important');
              node.style.setProperty('contain', 'none', 'important');
              node.style.setProperty('text-overflow', 'clip', 'important');
            }
            if (node instanceof HTMLElement
              && node.style.position === 'absolute' && node.style.display === 'flex') {
              /* Bộ dựng tự co 28 pt xuống để nhét vào hình thoi 12 px. Trong
                 file gốc chữ được phép tràn sang phải, nên bỏ riêng phép co đó. */
              if (/scale\(/i.test(String(node.style.transform || ''))) {
                node.style.removeProperty('transform');
                node.style.removeProperty('transform-origin');
              }
              node.style.setProperty('width', '100%', 'important');
              node.style.setProperty('height', '100%', 'important');
              node.style.setProperty('white-space', 'nowrap', 'important');
            }
            if (node instanceof SVGElement) node.setAttribute('overflow', 'visible');
          });
        };
        revealLabel();
        requestAnimationFrame(() => requestAnimationFrame(revealLabel));
      });
    }

    function wpPptxBuildKeyframes(effect, element) {
      const base = getComputedStyle(element).transform;
      const stable = base && base !== 'none' ? base : '';
      const subtype = String(effect.presetSubtype || '');
      const isExit = effect.presetClass === 'exit';
      const reverse = (frames) => isExit ? frames.slice().reverse() : frames;
      const direction = subtype.includes('left') || subtype === '8' ? [-80, 0]
        : (subtype.includes('right') || subtype === '2' ? [80, 0]
          : (subtype.includes('top') || subtype.includes('up') || subtype === '1' ? [0, -60] : [0, 60]));
      if (effect.presetClass === 'emph') {
        if ([8, 19, 31].includes(effect.presetId)) {
          return [{ transform: stable || 'none' }, { transform: `${stable} rotate(12deg) scale(1.08)`.trim() }, { transform: stable || 'none' }];
        }
        return [{ transform: stable || 'none', filter: 'brightness(1)' },
          { transform: `${stable} scale(1.12)`.trim(), filter: 'brightness(1.18)' },
          { transform: stable || 'none', filter: 'brightness(1)' }];
      }
      if ([2, 7, 12, 29, 30, 32, 34, 38, 39, 42, 50, 52, 53].includes(effect.presetId)) {
        return reverse([
          { opacity: 0, transform: `translate(${direction[0]}px, ${direction[1]}px) ${stable}`.trim() },
          { opacity: 1, transform: stable || 'none' },
        ]);
      }
      if ([22, 37, 45].includes(effect.presetId)) {
        return reverse([{ opacity: 0, clipPath: 'inset(0 100% 0 0)' }, { opacity: 1, clipPath: 'inset(0)' }]);
      }
      if ([23, 47].includes(effect.presetId)) {
        return reverse([{ opacity: 0, transform: `${stable} scale(.55)`.trim() }, { opacity: 1, transform: stable || 'none' }]);
      }
      if ([26, 40, 49].includes(effect.presetId)) {
        return reverse([{ opacity: 0, transform: `${stable} scale(.7)`.trim() },
          { opacity: 1, transform: `${stable} scale(1.08)`.trim() },
          { opacity: 1, transform: stable || 'none' }]);
      }
      return reverse([{ opacity: 0 }, { opacity: 1 }]);
    }

    function wpRestorePowerPointBuildState() {
      const groups = wpOrdinaryState.pptxBuildGroups;
      const paragraphFallbackStates = new Map();
      groups.forEach((group, groupIndex) => {
        group.forEach((effect) => {
          const element = effect.element;
          if (!(element instanceof HTMLElement)) return;
          if (effect.presetClass === 'entr' && effect.paragraphFallbackSlice) {
            let state = paragraphFallbackStates.get(element);
            if (!state) {
              state = { element, revealedBottom: 0 };
              paragraphFallbackStates.set(element, state);
            }
            if (groupIndex < wpOrdinaryState.pptxBuildIndex) {
              state.revealedBottom = Math.max(state.revealedBottom,
                Number(effect.paragraphFallbackSlice.bottom) || 0);
            }
            return;
          }
          const alreadyPlayed = groupIndex < wpOrdinaryState.pptxBuildIndex;
          if (effect.presetClass === 'entr') {
            element.style.visibility = alreadyPlayed ? 'visible' : 'hidden';
            element.style.opacity = alreadyPlayed ? '1' : '0';
          } else if (effect.presetClass === 'exit') {
            element.style.visibility = alreadyPlayed ? 'hidden' : 'visible';
            element.style.opacity = alreadyPlayed ? '0' : '1';
          } else {
            element.style.visibility = 'visible';
            element.style.opacity = '1';
          }
        });
      });
      paragraphFallbackStates.forEach((state) => {
        const bottom = Math.max(0, Math.min(100, Number(state.revealedBottom) || 0));
        state.element.style.visibility = 'visible';
        state.element.style.opacity = '1';
        state.element.style.clipPath = `inset(0 0 ${Math.max(0, 100 - bottom)}% 0)`;
        state.element.dataset.pptxParagraphRevealBottom = String(bottom);
        state.element.setAttribute('aria-hidden', bottom > 0 ? 'false' : 'true');
      });
    }

    function wpAlignPowerPointAnswerHighlight(slideElement, highlightElement) {
      if (!(slideElement instanceof HTMLElement) || !(highlightElement instanceof HTMLElement)) return false;
      if (highlightElement.dataset.pptxHighlightAligned === 'true') return true;
      const highlightRect = highlightElement.getBoundingClientRect();
      if (!(highlightRect.width > 8) || !(highlightRect.height > 5)) return false;
      const candidates = [];
      const walker = document.createTreeWalker(slideElement, NodeFilter.SHOW_TEXT, {
        acceptNode(node) {
          const parent = node && node.parentElement;
          if (!parent || !String(node.nodeValue || '').trim() || highlightElement.contains(parent)
            || parent.closest('.pptx-native-interaction-layer, button, audio, video')) {
            return NodeFilter.FILTER_REJECT;
          }
          return NodeFilter.FILTER_ACCEPT;
        },
      });
      let textNode = walker.nextNode();
      while (textNode) {
        const value = String(textNode.nodeValue || '');
        Array.from(value.matchAll(/(?:^|\s)([A-D])(?:\.|\))\s*[\s\S]*?(?=\s+[A-D](?:\.|\))\s|$)/gi)).forEach((match) => {
          const leading = /^\s/.test(match[0]) ? 1 : 0;
          const start = Math.max(0, Number(match.index) + leading);
          const end = Math.min(value.length, Number(match.index) + match[0].length);
          if (!(end > start)) return;
          const range = document.createRange();
          try {
            range.setStart(textNode, start);
            range.setEnd(textNode, end);
            const rects = Array.from(range.getClientRects()).filter((rect) => rect.width > 4 && rect.height > 4);
            if (!rects.length) return;
            const top = Math.min(...rects.map((rect) => rect.top));
            const bottom = Math.max(...rects.map((rect) => rect.bottom));
            const left = Math.min(...rects.map((rect) => rect.left));
            const right = Math.max(...rects.map((rect) => rect.right));
            const centerX = (left + right) / 2;
            const centerY = (top + bottom) / 2;
            const sourceCenterX = highlightRect.left + highlightRect.width / 2;
            const sourceCenterY = highlightRect.top + highlightRect.height / 2;
            candidates.push({
              top, bottom, left, right,
              distance: Math.abs(centerX - sourceCenterX) * .35 + Math.abs(centerY - sourceCenterY),
            });
          } catch (_) {}
        });
        textNode = walker.nextNode();
      }
      if (!candidates.length) return false;
      candidates.sort((left, right) => left.distance - right.distance);
      const target = candidates[0];
      /* Giữ nguyên kích thước hình chữ nhật của file gốc và chỉ hiệu chỉnh
         tâm của khung trùng tâm phương án sau khi trình duyệt dàn lại chữ.
         Cách này tránh đặt cạnh trên của khung đè ngang dòng chữ như slide 8. */
      const requestedDy = ((target.top + target.bottom) / 2)
        - (highlightRect.top + highlightRect.height / 2);
      const requestedDx = ((target.left + target.right) / 2)
        - (highlightRect.left + highlightRect.width / 2);
      const dy = Math.max(-highlightRect.height * .48, Math.min(highlightRect.height * .48, requestedDy));
      const dx = Math.max(-highlightRect.width * .32, Math.min(highlightRect.width * .32, requestedDx));
      /* getBoundingClientRect() trả về số đo sau CSS zoom của toàn slide,
         còn translate nhận đơn vị trước zoom. Quy đổi ngược để độ dịch trên
         màn hình đúng bằng khoảng lệch vừa đo. */
      const scaleX = highlightElement.offsetWidth > 0
        ? highlightRect.width / highlightElement.offsetWidth : 1;
      const scaleY = highlightElement.offsetHeight > 0
        ? highlightRect.height / highlightElement.offsetHeight : 1;
      const localDx = dx / (Number.isFinite(scaleX) && scaleX > .01 ? scaleX : 1);
      const localDy = dy / (Number.isFinite(scaleY) && scaleY > .01 ? scaleY : 1);
      highlightElement.style.translate = `${localDx}px ${localDy}px`;
      highlightElement.dataset.pptxHighlightAligned = 'true';
      return true;
    }

    function wpAlignPowerPointEllipseAnswerHighlight(slideElement, highlightElement) {
      if (!(slideElement instanceof HTMLElement) || !(highlightElement instanceof HTMLElement)) return false;
      highlightElement.style.removeProperty('translate');
      const highlightRect = highlightElement.getBoundingClientRect();
      if (!(highlightRect.width > 8) || !(highlightRect.height > 8)
        || highlightRect.width / highlightRect.height < .65
        || highlightRect.width / highlightRect.height > 1.35) return false;
      const candidates = [];
      const walker = document.createTreeWalker(slideElement, NodeFilter.SHOW_TEXT, {
        acceptNode(node) {
          const parent = node && node.parentElement;
          if (!parent || !String(node.nodeValue || '').trim() || highlightElement.contains(parent)
            || parent.closest('.pptx-native-interaction-layer, button, audio, video')) {
            return NodeFilter.FILTER_REJECT;
          }
          return NodeFilter.FILTER_ACCEPT;
        },
      });
      let textNode = walker.nextNode();
      while (textNode) {
        const value = String(textNode.nodeValue || '');
        Array.from(value.matchAll(/(^|\s)([A-D](?:\.|\)))/gi)).forEach((match) => {
          const start = Number(match.index) + String(match[1] || '').length;
          const end = Math.min(value.length, start + String(match[2] || '').length);
          if (!(end > start)) return;
          const range = document.createRange();
          try {
            range.setStart(textNode, start);
            range.setEnd(textNode, end);
            const rects = Array.from(range.getClientRects())
              .filter((rect) => rect.width > 1 && rect.height > 2);
            if (!rects.length) return;
            const left = Math.min(...rects.map((rect) => rect.left));
            const top = Math.min(...rects.map((rect) => rect.top));
            const right = Math.max(...rects.map((rect) => rect.right));
            const bottom = Math.max(...rects.map((rect) => rect.bottom));
            const centerX = (left + right) / 2;
            const centerY = (top + bottom) / 2;
            candidates.push({
              centerX, centerY,
              distance: Math.abs(centerX - (highlightRect.left + highlightRect.width / 2)) * .25
                + Math.abs(centerY - (highlightRect.top + highlightRect.height / 2)),
            });
          } catch (_) {
          } finally {
            try { range.detach(); } catch (_) {}
          }
        });
        textNode = walker.nextNode();
      }
      const highlightCenterX = highlightRect.left + highlightRect.width / 2;
      const highlightCenterY = highlightRect.top + highlightRect.height / 2;
      /* Bộ dựng đang nén khoảng cách dòng nên ký hiệu đúng luôn dịch lên so
         với tâm hình nguồn. Không lấy ký hiệu gần nhất ở cả hai phía nữa:
         nếu tâm nằm giữa A và B thì phải chọn A ở phía trên, không chọn B. */
      const sourceSideCandidates = candidates.filter((candidate) => (
        candidate.centerY <= highlightCenterY + highlightRect.height * .12
        && candidate.centerY >= highlightCenterY - highlightRect.height * .9
      )).sort((left, right) => (
        Math.abs(left.centerY - highlightCenterY) - Math.abs(right.centerY - highlightCenterY)
        || left.distance - right.distance
      ));
      let target = sourceSideCandidates[0] || null;
      /* Một số bộ dựng tạo A./B. bằng ký hiệu danh sách nên hai chữ này
         không nằm trong textContent. Khi đó lấy dòng chữ phương án gần nhất,
         chỉ hiệu chỉnh theo trục dọc và ưu tiên dòng ngay phía trên tâm khung;
         nhờ vậy không thể nhầm xuống C hoặc D. */
      if (!target) {
        const lineCandidates = [];
        const lineWalker = document.createTreeWalker(slideElement, NodeFilter.SHOW_TEXT);
        let lineNode = lineWalker.nextNode();
        while (lineNode) {
          const parent = lineNode.parentElement;
          const value = String(lineNode.nodeValue || '').trim();
          if (parent && value && !highlightElement.contains(parent)
            && !parent.closest('.pptx-native-interaction-layer, button, audio, video')) {
            const range = document.createRange();
            try {
              range.selectNodeContents(lineNode);
              Array.from(range.getClientRects()).forEach((rect) => {
                if (!(rect.width > 8) || !(rect.height > 3)
                  || rect.left < highlightRect.left + highlightRect.width * .45) return;
                const centerY = (rect.top + rect.bottom) / 2;
                if (centerY > highlightCenterY + highlightRect.height * .15
                  || centerY < highlightCenterY - highlightRect.height * .8) return;
                lineCandidates.push({
                  centerX:highlightCenterX,
                  centerY,
                  distance:Math.abs(centerY - highlightCenterY),
                });
              });
            } catch (_) {
            } finally {
              try { range.detach(); } catch (_) {}
            }
          }
          lineNode = lineWalker.nextNode();
        }
        lineCandidates.sort((left, right) => left.distance - right.distance);
        target = lineCandidates[0] || null;
      }
      if (!target) return false;
      const requestedDx = target.centerX - (highlightRect.left + highlightRect.width / 2);
      const requestedDy = target.centerY - (highlightRect.top + highlightRect.height / 2);
      const dx = Math.max(-highlightRect.width * .55, Math.min(highlightRect.width * .55, requestedDx));
      const dy = Math.max(-highlightRect.height * .75, Math.min(highlightRect.height * .75, requestedDy));
      const scaleX = highlightElement.offsetWidth > 0
        ? highlightRect.width / highlightElement.offsetWidth : 1;
      const scaleY = highlightElement.offsetHeight > 0
        ? highlightRect.height / highlightElement.offsetHeight : 1;
      const localDx = dx / (Number.isFinite(scaleX) && scaleX > .01 ? scaleX : 1);
      const localDy = dy / (Number.isFinite(scaleY) && scaleY > .01 ? scaleY : 1);
      highlightElement.style.translate = `${localDx}px ${localDy}px`;
      highlightElement.dataset.pptxHighlightAligned = 'true';
      return true;
    }

    function wpPowerPointTextInkRect(element) {
      if (!(element instanceof Element)) return null;
      const range = document.createRange();
      try {
        range.selectNodeContents(element);
        const rects = Array.from(range.getClientRects())
          .filter((rect) => rect.width > 1 && rect.height > 1);
        if (!rects.length) return null;
        const left = Math.min(...rects.map((rect) => rect.left));
        const top = Math.min(...rects.map((rect) => rect.top));
        const right = Math.max(...rects.map((rect) => rect.right));
        const bottom = Math.max(...rects.map((rect) => rect.bottom));
        return { left, top, right, bottom, width:right - left, height:bottom - top };
      } catch (_) {
        return null;
      } finally {
        try { range.detach(); } catch (_) {}
      }
    }

    function wpPowerPointOptionLabelRect(element, letter) {
      if (!(element instanceof Element)) return null;
      const wanted = String(letter || '').replace(/[^A-Za-z]/g, '').slice(0, 1);
      if (!wanted) return null;
      const matcher = new RegExp(`(^|\\s)(${wanted}\\))`, 'i');
      const walker = document.createTreeWalker(element, NodeFilter.SHOW_TEXT);
      let node = walker.nextNode();
      while (node) {
        const value = String(node.nodeValue || '');
        const match = matcher.exec(value);
        if (match) {
          const start = Number(match.index) + String(match[1] || '').length;
          const range = document.createRange();
          try {
            range.setStart(node, start);
            range.setEnd(node, Math.min(value.length, start + String(match[2] || '').length));
            const rects = Array.from(range.getClientRects())
              .filter((rect) => rect.width > 1 && rect.height > 1);
            if (rects.length) {
              const left = Math.min(...rects.map((rect) => rect.left));
              const top = Math.min(...rects.map((rect) => rect.top));
              const right = Math.max(...rects.map((rect) => rect.right));
              const bottom = Math.max(...rects.map((rect) => rect.bottom));
              return { left, top, right, bottom, width:right - left, height:bottom - top };
            }
          } catch (_) {
          } finally {
            try { range.detach(); } catch (_) {}
          }
        }
        node = walker.nextNode();
      }
      return null;
    }

    function wpPowerPointInnermostTextBlock(host, matcher) {
      if (!(host instanceof HTMLElement) || !(matcher instanceof RegExp)) return null;
      const matches = (element) => {
        matcher.lastIndex = 0;
        return matcher.test(String(element && element.textContent || '').replace(/\s+/g, ' ').trim());
      };
      const candidates = Array.from(host.querySelectorAll('div'))
        .filter((element) => element instanceof HTMLElement && matches(element));
      return candidates.find((element) => !Array.from(element.querySelectorAll('div'))
        .some((child) => child !== element && matches(child))) || null;
    }

    function wpPowerPointWrapOptionTail(paragraph, letter) {
      if (!(paragraph instanceof HTMLElement)) return null;
      const key = String(letter || '').toLowerCase();
      const existing = Array.from(paragraph.querySelectorAll('[data-pptx-option-tail]'))
        .find((element) => element instanceof HTMLElement
          && element.dataset.pptxOptionTail === key);
      if (existing instanceof HTMLElement) return existing;
      const matcher = new RegExp(`(^|\\s)(${key}\\))`, 'i');
      const walker = document.createTreeWalker(paragraph, NodeFilter.SHOW_TEXT);
      let node = walker.nextNode();
      while (node) {
        const value = String(node.nodeValue || '');
        const match = matcher.exec(value);
        if (!match) {
          node = walker.nextNode();
          continue;
        }
        const start = Number(match.index) + String(match[1] || '').length;
        const before = value.slice(0, start).replace(/\s+$/u, '');
        const tail = value.slice(start).replace(/\s+$/u, '');
        if (!tail || !node.parentNode) return null;
        node.nodeValue = before;
        const wrapper = document.createElement('span');
        wrapper.dataset.pptxOptionTail = key;
        wrapper.style.display = 'inline-block';
        wrapper.style.position = 'relative';
        wrapper.style.whiteSpace = 'nowrap';
        wrapper.appendChild(document.createTextNode(tail));
        node.parentNode.insertBefore(wrapper, node.nextSibling);
        return wrapper;
      }
      return null;
    }

    function wpFixPowerPointJustifiedAnswerLayout(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement) || !plan) return false;
      const highlightEntries = [];
      (Array.isArray(plan.groups) ? plan.groups : []).flat().forEach((effect) => {
        if (!effect || !effect.answerHighlight || !effect.bounds || !effect.nodeId
          || highlightEntries.some((entry) => entry.nodeId === String(effect.nodeId))) return;
        const element = wpPowerPointShapeHost(slideElement, effect.nodeId);
        if (!(element instanceof HTMLElement)) return;
        highlightEntries.push({
          nodeId:String(effect.nodeId), bounds:effect.bounds, element,
        });
      });
      if (highlightEntries.length < 3) return false;
      highlightEntries.sort((left, right) => (
        (Number(left.bounds.y) || 0) - (Number(right.bounds.y) || 0)
        || (Number(left.bounds.x) || 0) - (Number(right.bounds.x) || 0)
      ));
      const topPair = highlightEntries.slice(0, 2)
        .sort((left, right) => (Number(left.bounds.x) || 0) - (Number(right.bounds.x) || 0));
      const lowerRight = highlightEntries.slice(2)
        .sort((left, right) => (Number(right.bounds.x) || 0) - (Number(left.bounds.x) || 0))[0];
      if (!topPair[0] || !topPair[1] || !lowerRight) return false;

      const textHosts = Array.from(slideElement.querySelectorAll('[data-pptx-node-id]'))
        .filter((element) => element instanceof HTMLElement && /a\)\s*[\s\S]*b\)/i.test(String(element.textContent || ''))
          && /c\)\s*[\s\S]*d\)/i.test(String(element.textContent || '')));
      const textHost = textHosts.sort((left, right) => (
        String(left.textContent || '').length - String(right.textContent || '').length
      ))[0];
      if (!(textHost instanceof HTMLElement)
        || textHost.dataset.pptxJustifiedAnswerFixed === 'true') return false;
      const rowAB = wpPowerPointInnermostTextBlock(textHost, /a\)\s*[\s\S]*b\)/i);
      const rowCD = wpPowerPointInnermostTextBlock(textHost, /c\)\s*[\s\S]*d\)/i);
      const rowE = wpPowerPointInnermostTextBlock(textHost, /e\)\s*/i);
      if (!(rowAB instanceof HTMLElement) || !(rowCD instanceof HTMLElement)
        || !(rowE instanceof HTMLElement)) return false;

      const optionB = wpPowerPointWrapOptionTail(rowAB, 'b');
      const optionD = wpPowerPointWrapOptionTail(rowCD, 'd');
      if (!(optionB instanceof HTMLElement) || !(optionD instanceof HTMLElement)) return false;
      const boxA = topPair[0].element.getBoundingClientRect();
      const boxB = topPair[1].element.getBoundingClientRect();
      const boxD = lowerRight.element.getBoundingClientRect();
      const bInk = wpPowerPointTextInkRect(optionB);
      const dInk = wpPowerPointTextInkRect(optionD);
      if (!(boxA.width > 4) || !(boxB.width > 4) || !(boxD.width > 4)
        || !bInk || !dInk) return false;

      /* Trong PowerPoint, b) và d) dùng chung một cột. Tính điểm trái của
         cột từ tâm hai khung nguồn rồi lấy trung bình để loại sai số font. */
      const desiredBLeft = boxB.left + boxB.width / 2 - bInk.width / 2;
      const desiredDLeft = boxD.left + boxD.width / 2 - dInk.width / 2;
      const rightColumnLeft = (desiredBLeft + desiredDLeft) / 2;
      const hostRect = textHost.getBoundingClientRect();
      const scaleX = textHost.offsetWidth > 0 ? hostRect.width / textHost.offsetWidth : 1;
      const scaleY = textHost.offsetHeight > 0 ? hostRect.height / textHost.offsetHeight : 1;
      const safeScaleX = Number.isFinite(scaleX) && scaleX > .01 ? scaleX : 1;
      const safeScaleY = Number.isFinite(scaleY) && scaleY > .01 ? scaleY : 1;
      const moveOption = (element, ink) => {
        const dx = (rightColumnLeft - ink.left) / safeScaleX;
        element.style.translate = `${dx}px 0px`;
      };
      moveOption(optionB, bInk);
      moveOption(optionD, dInk);

      const labelA = wpPowerPointOptionLabelRect(rowAB, 'a');
      const labelB = wpPowerPointOptionLabelRect(rowAB, 'b');
      const labelC = wpPowerPointOptionLabelRect(rowCD, 'c');
      const labelD = wpPowerPointOptionLabelRect(rowCD, 'd');
      const labelE = wpPowerPointOptionLabelRect(rowE, 'e');
      if (labelA && labelB && labelC && labelD && labelE) {
        const centerY = (rect) => (rect.top + rect.bottom) / 2;
        const row0Target = (boxA.top + boxA.bottom + boxB.top + boxB.bottom) / 4;
        const row1Target = (boxD.top + boxD.bottom) / 2;
        const row2Target = row1Target + (row1Target - row0Target);
        const row0Current = (centerY(labelA) + centerY(labelB)) / 2;
        const row1Current = (centerY(labelC) + centerY(labelD)) / 2;
        const row2Current = centerY(labelE);
        rowAB.style.translate = `0px ${(row0Target - row0Current) / safeScaleY}px`;
        rowCD.style.translate = `0px ${(row1Target - row1Current) / safeScaleY}px`;
        rowE.style.translate = `0px ${(row2Target - row2Current) / safeScaleY}px`;
      }
      textHost.dataset.pptxJustifiedAnswerFixed = 'true';
      return true;
    }

    function wpApplyPowerPointInitialShapeVisibility(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement)) return;
      const hiddenShapeIds = new Set(Array.isArray(plan && plan.hiddenShapeIds)
        ? plan.hiddenShapeIds.map((shapeId) => String(shapeId))
        : []);
      hiddenShapeIds.forEach((shapeId) => {
        const host = wpPowerPointShapeHost(slideElement, shapeId);
        if (host) {
          host.dataset.pptxInitiallyHidden = 'true';
          host.style.setProperty('display', 'none', 'important');
          host.style.visibility = 'hidden';
          host.style.opacity = '0';
          host.setAttribute('aria-hidden', 'true');
        }
        const fallbackHost = wpPowerPointFallbackShapeHost(slideElement, shapeId);
        if (fallbackHost) fallbackHost.remove();
      });
      const interactiveEntranceShapeIds = new Set(Array.isArray(plan && plan.interactiveEntranceShapeIds)
        ? plan.interactiveEntranceShapeIds.map((shapeId) => String(shapeId))
        : []);
      interactiveEntranceShapeIds.forEach((shapeId) => {
        if (hiddenShapeIds.has(shapeId)) return;
        const host = wpPowerPointShapeHost(slideElement, shapeId);
        if (!(host instanceof HTMLElement)) return;
        host.dataset.pptxInteractiveEntrance = 'true';
        host.style.visibility = 'hidden';
        host.style.opacity = '0';
        host.setAttribute('aria-hidden', 'true');
      });
    }

    function wpPowerPointFallbackParagraphBuildElement(shapeHost, effect) {
      const slice = effect && effect.paragraphFallbackSlice;
      if (!(shapeHost instanceof HTMLElement) || !slice || !shapeHost.parentElement) return null;
      const top = Math.max(0, Math.min(100, Number(slice.top) || 0));
      const bottom = Math.max(top, Math.min(100, Number(slice.bottom) || top));
      if (!(bottom > top)) return null;
      if (shapeHost.dataset.pptxParagraphFallbackSource !== 'true') {
        shapeHost.dataset.pptxParagraphFallbackSource = 'true';
        shapeHost.dataset.pptxParagraphSourceVisibility = shapeHost.style.visibility || '__empty__';
        shapeHost.dataset.pptxParagraphSourceOpacity = shapeHost.style.opacity || '__empty__';
        shapeHost.dataset.pptxParagraphSourceAriaHidden = shapeHost.hasAttribute('aria-hidden')
          ? String(shapeHost.getAttribute('aria-hidden')) : '__missing__';
        shapeHost.style.visibility = 'hidden';
        shapeHost.style.opacity = '0';
        shapeHost.setAttribute('aria-hidden', 'true');
      }
      const wrapper = document.createElement('div');
      wrapper.className = 'pptx-native-paragraph-slice';
      wrapper.dataset.pptxParagraphSliceSourceId = String(effect.nodeId || '');
      const computed = getComputedStyle(shapeHost);
      wrapper.style.position = shapeHost.style.position || computed.position || 'absolute';
      ['left', 'top', 'right', 'bottom', 'width', 'height', 'zIndex', 'transform',
        'transformOrigin', 'transformBox'].forEach((property) => {
        const value = shapeHost.style[property];
        if (value) wrapper.style[property] = value;
      });
      wrapper.style.clipPath = `inset(${top}% 0 ${Math.max(0, 100 - bottom)}% 0)`;
      wrapper.style.pointerEvents = 'none';
      wrapper.style.overflow = 'visible';
      const clone = shapeHost.cloneNode(true);
      clone.removeAttribute('data-pptx-node-id');
      clone.removeAttribute('data-pptx-paragraph-fallback-source');
      clone.removeAttribute('data-pptx-paragraph-source-visibility');
      clone.removeAttribute('data-pptx-paragraph-source-opacity');
      clone.removeAttribute('data-pptx-paragraph-source-aria-hidden');
      clone.querySelectorAll('[data-pptx-node-id]').forEach((node) => node.removeAttribute('data-pptx-node-id'));
      clone.style.position = 'absolute';
      clone.style.left = '0';
      clone.style.top = '0';
      clone.style.right = 'auto';
      clone.style.bottom = 'auto';
      clone.style.width = '100%';
      clone.style.height = '100%';
      clone.style.transform = 'none';
      clone.style.transformOrigin = 'center center';
      clone.style.visibility = 'visible';
      clone.style.opacity = '1';
      clone.removeAttribute('aria-hidden');
      clone.dataset.pptxParagraphBuildTarget = 'true';
      wrapper.appendChild(clone);
      let anchor = shapeHost;
      while (anchor.nextElementSibling instanceof HTMLElement
        && anchor.nextElementSibling.classList.contains('pptx-native-paragraph-slice')
        && anchor.nextElementSibling.dataset.pptxParagraphSliceSourceId === String(effect.nodeId || '')) {
        anchor = anchor.nextElementSibling;
      }
      shapeHost.parentElement.insertBefore(wrapper, anchor.nextSibling);
      return clone;
    }

    function wpPowerPointParagraphBuildElements(shapeHost, effect) {
      if (!(shapeHost instanceof HTMLElement) || !effect || !effect.paragraphRange) return [];
      if (effect.presetClass === 'entr' && effect.paragraphFallbackSlice) {
        shapeHost.dataset.pptxParagraphCumulativeTarget = 'true';
        return [shapeHost];
      }
      const start = Math.max(0, Number(effect.paragraphRange.start) || 0);
      const end = Math.max(start, Number(effect.paragraphRange.end) || start);
      const expectedCount = Math.max(end + 1, Number(effect.shapeParagraphCount) || 0);
      const candidates = [shapeHost, ...Array.from(shapeHost.querySelectorAll('div'))]
        .filter((candidate) => candidate instanceof HTMLElement
          && candidate.style.display === 'flex'
          && candidate.style.flexDirection === 'column')
        .map((candidate) => {
          const children = Array.from(candidate.children)
            .filter((child) => child instanceof HTMLElement);
          let score = children.length >= end + 1 ? 20 : -1000;
          if (expectedCount && children.length === expectedCount) score += 100;
          if (candidate.style.position === 'absolute') score += 10;
          if (children.some((child) => String(child.textContent || '').trim())) score += 5;
          return { candidate, children, score };
        })
        .filter((entry) => entry.score >= 0)
        .sort((left, right) => right.score - left.score);
      if (!candidates.length) return [];
      const paragraphs = candidates[0].children.slice(start, end + 1);
      paragraphs.forEach((paragraph, offset) => {
        paragraph.dataset.pptxParagraphIndex = String(start + offset);
        paragraph.dataset.pptxParagraphBuildTarget = 'true';
      });
      return paragraphs;
    }

    function wpRestorePowerPointSpacedParagraphs(slideElement, plan) {
      if (!(slideElement instanceof HTMLElement)) return 0;
      const shapeEntries = Array.isArray(plan && plan.spacedParagraphs) ? plan.spacedParagraphs : [];
      const norm = (text) => String(text || '').replace(/\s+/g, ' ').trim().toLowerCase();
      let corrected = 0;
      shapeEntries.forEach((entry) => {
        const host = wpPowerPointShapeHost(slideElement, entry.shapeId);
        if (!(host instanceof HTMLElement)) return;
        const lines = Array.isArray(entry.lines) ? entry.lines : [];
        const nonempty = lines.filter((line) => norm(line.text)).length;
        const candidates = [host, ...host.querySelectorAll('div')].filter((candidate) =>
          candidate instanceof HTMLElement && getComputedStyle(candidate).display === 'flex'
          && getComputedStyle(candidate).flexDirection === 'column');
        const matches = candidates.map((candidate) => {
          const children = Array.from(candidate.children).filter((child) => child instanceof HTMLElement);
          if (children.length < nonempty || children.length > lines.length + 3) return null;
          let textScore = 0;
          lines.forEach((line, i) => {
            const target = norm(line.text);
            if (!target) return;
            const actual = norm(children[i] && children[i].textContent);
            if (actual === target) textScore += 2;
            else if (actual && (actual.includes(target) || target.includes(actual))) textScore += 1;
          });
          return { children, textScore };
        }).filter(Boolean).sort((a, b) => b.textScore - a.textScore);
        const match = matches[0];
        if (!match || match.textScore < Math.min(3, nonempty)) return;
        lines.forEach((line, index) => {
          if (!(line.ratio >= 1.8 && line.ratio <= 6 && line.fontPt >= 8)) return;
          const paragraph = match.children[index];
          if (!(paragraph instanceof HTMLElement) || paragraph.dataset.pptxSpacingRestored) return;
          if (!norm(paragraph.textContent).includes(norm(line.text))) return;
          const targetPx = line.fontPt * (96 / 72) * line.ratio;
          const currentPx = Math.max(0, paragraph.offsetHeight || 0);
          /* Để nguyên baseline và chiều cao hộp nguồn; thêm leading cân đối
             bên TRONG từng đoạn thay vì dời các hộp công thức bên ngoài. */
          const extra = Math.max(0, targetPx - currentPx);
          if (!(extra > 7)) return;
          paragraph.style.setProperty('padding-top', `${(extra / 2).toFixed(2)}px`, 'important');
          paragraph.style.setProperty('padding-bottom', `${(extra / 2).toFixed(2)}px`, 'important');
          paragraph.style.setProperty('box-sizing', 'content-box', 'important');
          paragraph.dataset.pptxSpacingRestored = 'true';
          corrected += 1;
        });
      });
      if (corrected) slideElement.dataset.pptxParagraphSpacingsRestored = String(corrected);
      return corrected;
    }

    /* Các slide ĐÚNG/SAI có hai lần nhấn đầu chỉ để đưa câu hỏi và
       cặp nút lên sân khấu; ở trạng thái 0/3 chúng có thể trống hoàn toàn
       do bộ dựng chưa dựng xong cả nhóm. Đưa các nhóm MỞ ĐẦU về trạng thái
       nhìn thấy được, giữ nguyên nhóm EXIT cuối (chẳng hạn ẩn nút SAI). */
    function wpPowerPointOpeningQuestionGroups(plan) {
      const groups = Array.isArray(plan && plan.groups) ? plan.groups : [];
      if (groups.length < 3) return 0;
      const last = groups[groups.length - 1];
      if (!Array.isArray(last) || !last.some((effect) => effect.presetClass === 'exit')) return 0;
      let count = 0;
      while (count < groups.length - 1) {
        const group = groups[count];
        if (!Array.isArray(group) || !group.length
          || !group.every((effect) => effect.presetClass === 'entr')) break;
        count += 1;
      }
      if (count < 2) return 0;
      const earlyEffects = groups.slice(0, count).flat();
      const earlyText = earlyEffects.map((effect) => String(effect.shapeText || '').toLowerCase()).join(' ');
      const texts = earlyEffects.some((effect) => /đúng|sai/i.test(String(effect.shapeText || '')));
      const hasAnswerPair = texts || (earlyEffects.some((effect) => /đúng/i.test(String(effect.shapeName || '')))
        && earlyEffects.some((effect) => /sai/i.test(String(effect.shapeName || ''))));
      /* Yêu cầu một nhóm xuất hiện chứa ít nhất 2 thành phần đồng thời,
         tránh tự động bỏ qua các slide dạy học vốn cố ý xuất hiện từng ý. */
      if (!hasAnswerPair || !groups.slice(0, count).some((group) => group.length >= 3)) return 0;
      return count;
    }

    function wpPrepareCurrentPowerPointBuilds(resetBuild = true, options = {}) {
      const slideElement = wpTagCurrentPowerPointSlideNodes();
      wpFixPowerPointWingdingsGlyphs(slideElement);
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || { groups: [] };
      wpRestorePowerPointSpacedParagraphs(slideElement, plan);
      const suppressAutoStart = !!(options && options.suppressAutoStart);
      wpCorrectPowerPointActionTargetTags(slideElement, plan);
      wpFixPowerPointAnswerLabelOverflow(slideElement, plan);
      const groups = (Array.isArray(plan.groups) ? plan.groups : []).map((group) => group.flatMap((effect) => {
        let shapeElement = slideElement instanceof HTMLElement
          ? wpPowerPointShapeHost(slideElement, effect.nodeId)
          : null;
        if (!(shapeElement instanceof HTMLElement) && slideElement instanceof HTMLElement
          && effect.repeatIndefinitely && effect.bounds) {
          shapeElement = wpPowerPointInteractionHost(slideElement, {
            shapeId: effect.nodeId,
            bounds: effect.bounds,
          }, { ...plan, coordinateHitAreas: true });
        }
        if (shapeElement instanceof HTMLElement && effect.answerHighlight) {
          /* Hình chữ nhật viền đỏ đã có tọa độ tuyệt đối đúng trong XML PPTX.
             Không dịch khung theo chữ vì chính phần chữ có thể đang bị bộ dựng
             web xử lý sai khoảng trắng/tab. */
          shapeElement.style.removeProperty('translate');
          delete shapeElement.dataset.pptxHighlightAligned;
        }
        if (shapeElement instanceof HTMLElement && effect.answerHighlightKind === 'ellipse') {
          delete shapeElement.dataset.pptxHighlightAligned;
          wpAlignPowerPointEllipseAnswerHighlight(slideElement, shapeElement);
        }
        const paragraphElements = wpPowerPointParagraphBuildElements(shapeElement, effect);
        const elements = paragraphElements.length ? paragraphElements : [shapeElement];
        const prepared = elements.filter((element) => element instanceof HTMLElement)
          .map((element) => ({ ...effect, element }));
        /* A PowerPoint color change belongs to its source shape, even when
           AlternateContent/shape groups prevent a one-to-one DOM tag.  Do
           not silently discard the click effect merely because its main
           animation element is missing.  The action resolves by bounds. */
        const hasVisualAction = (Array.isArray(effect.actions) ? effect.actions : [])
          .some((action) => action && (action.type === 'color' || action.type === 'set'));
        if (!prepared.length && (effect.presetClass === 'mediacall' || hasVisualAction)) {
          prepared.push({ ...effect, element: null });
        }
        return prepared;
      }).filter((effect) => effect.presetClass === 'mediacall'
        || effect.element instanceof HTMLElement
        || (Array.isArray(effect.actions) && effect.actions.some((action) => action
          && (action.type === 'color' || action.type === 'set'))))).filter((group) => group.length);
      wpOrdinaryState.pptxBuildGroups = groups;
      wpOrdinaryState.pptxBuildIndex = resetBuild
        ? 0
        : Math.min(wpOrdinaryState.pptxBuildIndex, groups.length);
      if (resetBuild) wpOrdinaryState.pptxSelectedTriggerShapeId = '';
      wpRestorePowerPointBuildState();
      wpFixPowerPointJustifiedAnswerLayout(slideElement, plan);
      wpApplyPowerPointInitialShapeVisibility(slideElement, plan);
      if (!resetBuild && wpOrdinaryState.pptxBuildIndex > 0) {
        groups.slice(0, wpOrdinaryState.pptxBuildIndex).forEach((group) => group.forEach((effect) => {
          const completedStyles = (Array.isArray(effect.actions) ? effect.actions : [])
            .filter((action) => action && (action.type === 'color'
              || (action.type === 'set' && /^fill\./i.test(String(action.attributeName || '')))));
          if (completedStyles.length) wpRunPowerPointActionList(slideElement, completedStyles);
        }));
      }
      wpActivateCurrentPowerPointInteractions(slideElement);
      wpEnablePowerPointPendingAudioResume(slideElement);
      if (resetBuild && !suppressAutoStart) {
        wpRunPowerPointAutoStartBuilds();
        /* On some classroom quiz slides one clickEffect starts a single
           bundle of >=8 entrance shapes (prompt and all answer cards).
           Showing the incomplete pre-entrance frame looks like an extra
           slide with only A.  Materialize this opening bundle as the slide's
           ready state; later color/emphasis clicks remain distinct builds.
           Keep this structural test narrow, not tied to a slide title. */
        const firstOriginalGroup = Array.isArray(plan.groups) ? plan.groups[0] : null;
        const openingEntrances = Array.isArray(firstOriginalGroup)
          ? firstOriginalGroup.filter((effect) => effect && effect.presetClass === 'entr') : [];
        const completeEntranceBundle = firstOriginalGroup && openingEntrances.length >= 8
          && firstOriginalGroup.length === openingEntrances.length
          && firstOriginalGroup[0].trigger === 'clickEffect'
          && firstOriginalGroup.slice(1).every((effect) => effect.trigger === 'withEffect');
        if (completeEntranceBundle && wpOrdinaryState.pptxBuildIndex === 0
          && wpOrdinaryState.pptxBuildGroups.length > 1) {
          wpOrdinaryState.pptxBuildIndex = 1;
          wpRestorePowerPointBuildState();
          slideElement.dataset.pptxOpeningBundleRevealed = 'true';
        }
        const openingQuestionGroups = wpPowerPointOpeningQuestionGroups(plan);
        if (openingQuestionGroups > 0 && wpOrdinaryState.pptxBuildIndex < openingQuestionGroups) {
          wpOrdinaryState.pptxBuildIndex = Math.min(openingQuestionGroups, wpOrdinaryState.pptxBuildGroups.length);
          wpRestorePowerPointBuildState();
          slideElement.dataset.pptxOpeningQuestionRevealed = String(openingQuestionGroups);
        }
        wpStartPowerPointPrizeIntro(slideElement, plan);
      }
      return slideElement;
    }

    function wpRunNextPowerPointBuild() {
      if (wpOrdinaryState.kind !== 'pptx-slide'
        || wpOrdinaryState.pptxBuildIndex >= wpOrdinaryState.pptxBuildGroups.length) return false;
      const slideElement = wpPptxSlideDomElement();
      const group = wpOrdinaryState.pptxBuildGroups[wpOrdinaryState.pptxBuildIndex];
      wpOrdinaryState.pptxBuildIndex += 1;
      const paragraphFallbackTargets = new Map();
      group.forEach((effect) => {
        const element = effect.element;
        if (!(element instanceof HTMLElement) || effect.presetClass !== 'entr'
          || !effect.paragraphFallbackSlice) return;
        const current = paragraphFallbackTargets.get(element) || {
          element, bottom: 0, duration: 0,
        };
        current.bottom = Math.max(current.bottom,
          Number(effect.paragraphFallbackSlice.bottom) || 0);
        current.duration = Math.max(current.duration, Number(effect.duration) || 0);
        paragraphFallbackTargets.set(element, current);
      });
      paragraphFallbackTargets.forEach((target) => {
        const element = target.element;
        const fromBottom = Math.max(0, Math.min(100,
          Number(element.dataset.pptxParagraphRevealBottom) || 0));
        const toBottom = Math.max(fromBottom, Math.min(100, Number(target.bottom) || 0));
        const fromClip = `inset(0 0 ${Math.max(0, 100 - fromBottom)}% 0)`;
        const toClip = `inset(0 0 ${Math.max(0, 100 - toBottom)}% 0)`;
        const previousAnimation = element._pptxParagraphRevealAnimation;
        if (previousAnimation && typeof previousAnimation.cancel === 'function') {
          try { previousAnimation.cancel(); } catch (_) {}
        }
        element.style.visibility = 'visible';
        element.style.opacity = '1';
        element.style.clipPath = fromClip;
        element.dataset.pptxParagraphRevealBottom = String(toBottom);
        element.setAttribute('aria-hidden', toBottom > 0 ? 'false' : 'true');
        if (typeof element.animate !== 'function' || !(target.duration > 0)) {
          element.style.clipPath = toClip;
          return;
        }
        const animation = element.animate([
          { clipPath: fromClip },
          { clipPath: toClip },
        ], {
          duration: Math.max(80, target.duration),
          easing: 'ease-out',
          fill: 'forwards',
        });
        element._pptxParagraphRevealAnimation = animation;
        animation.addEventListener('finish', () => {
          element.style.clipPath = toClip;
          if (element._pptxParagraphRevealAnimation === animation) {
            element._pptxParagraphRevealAnimation = null;
          }
          try { animation.cancel(); } catch (_) {}
        }, { once: true });
      });
      let chainedDelay = 0;
      group.forEach((effect) => {
        if (effect.presetClass === 'entr' && effect.paragraphFallbackSlice
          && effect.element instanceof HTMLElement) return;
        const effectDelay = effect.trigger === 'afterEffect' ? chainedDelay : 0;
        if (effect.trigger === 'afterEffect') chainedDelay += effect.duration;
        else chainedDelay = Math.max(chainedDelay, effect.duration);
        if (effect.presetClass === 'mediacall') {
          setTimeout(() => wpRunPowerPointMediaCommand(effect.nodeId, effect.command), effectDelay);
          return;
        }
        if (effect.repeatIndefinitely && Array.isArray(effect.actions) && effect.actions.length) {
          setTimeout(() => wpRunPowerPointActionList(slideElement, effect.actions), effectDelay);
          return;
        }
        /* pptx animClr + set(fill.on/type) can be attached to an ordinary
           clickEffect (not only to a repeating/interactive effect).  These
           style actions were parsed but never executed by the old path.
           Apply only fill and visibility settings: the emphasis movement
           is already performed below, so do not animate it twice. */
        const styleActions = (Array.isArray(effect.actions) ? effect.actions : [])
          .filter((action) => action && (action.type === 'color'
            || (action.type === 'set' && /^(?:fill\.|style\.|visibility)/i.test(
              String(action.attributeName || '')))));
        if (styleActions.length) {
          const clickedPage = wpOrdinaryState.pageIndex;
          setTimeout(() => {
            if (wpOrdinaryState.kind === 'pptx-slide'
              && wpOrdinaryState.pageIndex === clickedPage
              && slideElement.isConnected) {
              wpRunPowerPointActionList(slideElement, styleActions);
            }
          }, effectDelay);
        }
        const element = effect.element;
        if (!(element instanceof HTMLElement)) return;
        if (effect.presetClass === 'entr') element.style.visibility = 'visible';
        const frames = wpPptxBuildKeyframes(effect, element);
        if (typeof element.animate !== 'function') {
          if (effect.presetClass === 'exit') {
            element.style.visibility = 'hidden';
            element.style.opacity = '0';
          } else {
            element.style.visibility = 'visible';
            element.style.opacity = '1';
          }
          return;
        }
        const animation = element.animate(frames, {
          duration: effect.duration,
          delay: effectDelay,
          easing: effect.presetClass === 'emph' ? 'ease-in-out' : 'ease-out',
          fill: 'forwards',
        });
        animation.addEventListener('finish', () => {
          if (effect.presetClass === 'exit') {
            element.style.visibility = 'hidden';
            element.style.opacity = '0';
          } else {
            element.style.visibility = 'visible';
            element.style.opacity = '1';
          }
          try { animation.cancel(); } catch (_) {}
        }, { once: true });
      });
      wpSyncOrdinaryPageUi();
      return true;
    }

    function wpRunPowerPointAutoStartBuilds() {
      let started = 0;
      while (wpOrdinaryState.pptxBuildIndex < wpOrdinaryState.pptxBuildGroups.length) {
        const group = wpOrdinaryState.pptxBuildGroups[wpOrdinaryState.pptxBuildIndex];
        const firstEffect = Array.isArray(group) ? group[0] : null;
        const isPrizeIntro = (Array.isArray(group) ? group : []).some((effect) => effect
          && effect.repeatIndefinitely && /^\s*\$/.test(String(effect.shapeText || '')));
        if (!firstEffect || firstEffect.trigger === 'clickEffect' || isPrizeIntro) break;
        if (!wpRunNextPowerPointBuild()) break;
        started += 1;
      }
      return started;
    }

    function wpApplyPowerPointSlideTransition(direction = 1) {
      const root = wpOrdinaryState.pptxRoot;
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const transition = plan.transition || {};
      if (!(root instanceof HTMLElement)) return;
      const classes = Array.from(root.classList).filter((name) => name.startsWith('is-pptx-transition-'));
      classes.forEach((name) => root.classList.remove(name));
      if (!transition.kind || transition.kind === 'none') return;
      let className = `is-pptx-transition-${transition.kind}`;
      if (transition.kind === 'push') {
        const rawDirection = String(transition.direction || '').toLowerCase();
        const side = rawDirection.startsWith('r') ? 'right'
          : (rawDirection.startsWith('u') || rawDirection.startsWith('t') ? 'up'
            : (rawDirection.startsWith('d') || rawDirection.startsWith('b') ? 'down' : 'left'));
        const opposite = { left: 'right', right: 'left', up: 'down', down: 'up' };
        className = `is-pptx-transition-push-${direction < 0 ? opposite[side] : side}`;
      }
      root.style.setProperty('--pptx-transition-duration', `${Math.max(80, Number(transition.duration) || 560)}ms`);
      void root.offsetWidth;
      root.classList.add(className);
      setTimeout(() => root.classList.remove(className), Math.max(100, Number(transition.duration) || 560) + 80);
    }

    function wpPowerPointSlideIsHidden(index) {
      return !!(wpOrdinaryState.pptxSlidePlans[index] && wpOrdinaryState.pptxSlidePlans[index].hidden);
    }

    function wpPowerPointVisibleSlideIndex(startIndex, direction = 1) {
      const step = direction < 0 ? -1 : 1;
      for (let index = startIndex; index >= 0 && index < wpOrdinaryState.pageCount; index += step) {
        if (!wpPowerPointSlideIsHidden(index)) return index;
      }
      return -1;
    }

    function wpPowerPointUpcomingSlideIndices(currentIndex, count = 2) {
      const indices = [];
      let index = currentIndex;
      while (indices.length < count) {
        index = wpPowerPointVisibleSlideIndex(index + 1);
        if (index < 0) break;
        indices.push(index);
      }
      return indices;
    }

    function wpSyncPowerPointControls() {
      const isPowerPoint = wpState.documentMode === 'ordinary'
        && wpOrdinaryState.kind === 'pptx-slide';
      powerPointControls.hidden = true;
      if (!isPowerPoint) return;
      const pageNumber = wpOrdinaryState.pageCount ? wpOrdinaryState.pageIndex + 1 : 0;
      const hasPendingBuild = wpOrdinaryState.pptxBuildIndex < wpOrdinaryState.pptxBuildGroups.length;
      powerPointCounterEl.textContent = `${pageNumber} / ${wpOrdinaryState.pageCount || 0}`;
      powerPointPrevBtn.disabled = !wpOrdinaryState.pageCount
        || (wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageIndex - 1, -1) < 0 && wpOrdinaryState.pptxBuildIndex <= 0);
      powerPointNextBtn.disabled = !wpOrdinaryState.pageCount
        || (wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageIndex + 1) < 0 && !hasPendingBuild);
      powerPointPlayBtn.disabled = !wpOrdinaryState.pageCount;
      const autoRunning = wpOrdinaryState.pptxPlaybackActive
        || (!!wpOrdinaryState.pptxAutoTimer && !wpOrdinaryState.pptxPlaybackPaused);
      powerPointPlayBtn.setAttribute('aria-pressed', autoRunning ? 'true' : 'false');
      powerPointPlayBtn.setAttribute('aria-label', autoRunning
        ? 'Tạm dừng trình chiếu tự động'
        : 'Tự động trình chiếu');
      powerPointPlayBtn.title = autoRunning
        ? 'Tạm dừng trình chiếu tự động'
        : 'Tự động trình chiếu';
      powerPointPlayBtn.textContent = autoRunning ? 'Ⅱ' : '▶';
      const fullscreenActive = wordPresentationIsFullscreen();
      powerPointFullscreenBtn.setAttribute('aria-pressed', fullscreenActive ? 'true' : 'false');
      powerPointFullscreenBtn.setAttribute('aria-label', fullscreenActive
        ? 'Thoát toàn màn hình'
        : 'Toàn màn hình');
      powerPointFullscreenBtn.title = fullscreenActive ? 'Thoát toàn màn hình' : 'Toàn màn hình (F5)';
    }

    function wpSetPowerPointPlayback(active, paused = false) {
      wpOrdinaryState.pptxPlaybackActive = !!active;
      wpOrdinaryState.pptxPlaybackPaused = !active && !!paused;
      if (wpOrdinaryState.pptxAutoTimer) clearTimeout(wpOrdinaryState.pptxAutoTimer);
      wpOrdinaryState.pptxAutoTimer = 0;
      wpSyncPowerPointControls();
      if (active) wpSchedulePowerPointAutoAdvance();
    }

    function wpSchedulePowerPointAutoAdvance() {
      if (wpOrdinaryState.pptxAutoTimer) clearTimeout(wpOrdinaryState.pptxAutoTimer);
      wpOrdinaryState.pptxAutoTimer = 0;
      if (wpOrdinaryState.pptxPlaybackPaused) return;
      const plan = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex] || {};
      const configuredDelay = Number(plan.transition && plan.transition.advanceAfter) || 0;
      const hasPendingBuild = wpOrdinaryState.pptxBuildIndex < wpOrdinaryState.pptxBuildGroups.length;
      const delay = configuredDelay > 0
        ? configuredDelay
        : (wpOrdinaryState.pptxPlaybackActive ? (hasPendingBuild ? 1800 : 5000) : 0);
      if (!(delay > 0)) return;
      const slideIndex = wpOrdinaryState.pageIndex;
      wpOrdinaryState.pptxAutoTimer = setTimeout(() => {
        wpOrdinaryState.pptxAutoTimer = 0;
        if (wpOrdinaryState.kind !== 'pptx-slide' || wpOrdinaryState.pageIndex !== slideIndex) return;
        if (wpRunNextPowerPointBuild()) {
          wpSchedulePowerPointAutoAdvance();
          return;
        }
        if (!wpAdvancePowerPointPresentation(1)) {
          if (wpOrdinaryState.pptxPlaybackActive) wpSetPowerPointPlayback(false, false);
          else wpSyncPowerPointControls();
        }
      }, Math.max(250, delay));
      wpSyncPowerPointControls();
    }

    function wpResetOrdinaryDocument(preservePowerPointAudio = false) {
      if (window.mvipWordVideo) window.mvipWordVideo.reset();
      wpOrdinaryState.renderToken += 1;
      wpOrdinaryState.pptxRenderSerial += 1;
      wpOrdinaryState.pptxThumbnailSerial += 1;
      if (wpOrdinaryState.pptxAutoTimer) clearTimeout(wpOrdinaryState.pptxAutoTimer);
      wpOrdinaryState.pptxAutoTimer = 0;
      if (wpOrdinaryState.pptxPreloadIdleHandle) {
        if (wpOrdinaryState.pptxPreloadIdleKind === 'idle'
          && typeof window.cancelIdleCallback === 'function') {
          window.cancelIdleCallback(wpOrdinaryState.pptxPreloadIdleHandle);
        } else {
          clearTimeout(wpOrdinaryState.pptxPreloadIdleHandle);
        }
      }
      wpOrdinaryState.pptxPreloadIdleHandle = 0;
      wpOrdinaryState.pptxPreloadIdleKind = '';
      if (wpOrdinaryState.docxLazyIdleHandle) {
        if (wpOrdinaryState.docxLazyIdleKind === 'idle'
          && typeof window.cancelIdleCallback === 'function') {
          window.cancelIdleCallback(wpOrdinaryState.docxLazyIdleHandle);
        } else {
          clearTimeout(wpOrdinaryState.docxLazyIdleHandle);
        }
      }
      wpOrdinaryState.docxLazyIdleHandle = 0;
      wpOrdinaryState.docxLazyIdleKind = '';
      if (wpOrdinaryState.docxLazyHost instanceof HTMLElement) {
        wpOrdinaryState.docxLazyHost.remove();
      }
      wpOrdinaryState.docxLazyHost = null;
      wpOrdinaryState.docxPageCountHint = 0;
      wpStopPowerPointMedia();
      wpOrdinaryState.officeObjectUrls.forEach((objectUrl) => {
        try { URL.revokeObjectURL(objectUrl); } catch (_) {}
      });
      wpOrdinaryState.officeObjectUrls = [];
      wpOrdinaryState.pptxObjectUrls.forEach((objectUrl) => {
        try { URL.revokeObjectURL(objectUrl); } catch (_) {}
      });
      wpOrdinaryState.pptxObjectUrls = [];
      wpOrdinaryState.pptxDecodedSoundBuffers.clear();
      wpOrdinaryState.pptxAudioSourceNodes.clear();
      if (!preservePowerPointAudio) {
        wpOrdinaryState.pptxAudioBufferPromises.clear();
        if (wpOrdinaryState.pptxAudioContext && wpOrdinaryState.pptxAudioContext.state !== 'closed') {
          try { wpOrdinaryState.pptxAudioContext.close(); } catch (_) {}
        }
        wpOrdinaryState.pptxAudioContext = null;
        wpOrdinaryState.pptxAudioUnlocked = false;
      }
      if (wpOrdinaryState.pptxViewer && typeof wpOrdinaryState.pptxViewer.destroy === 'function') {
        try { wpOrdinaryState.pptxViewer.destroy(); } catch (_) {}
      }
      if (wpOrdinaryState.pptxPreloadViewer
        && typeof wpOrdinaryState.pptxPreloadViewer.destroy === 'function') {
        try { wpOrdinaryState.pptxPreloadViewer.destroy(); } catch (_) {}
      } else if (wpOrdinaryState.pptxPreloadViewer
        && typeof wpOrdinaryState.pptxPreloadViewer.close === 'function') {
        try { wpOrdinaryState.pptxPreloadViewer.close(); } catch (_) {}
      }
      if (wpOrdinaryState.pptxPreloadHost instanceof HTMLElement) {
        wpOrdinaryState.pptxPreloadHost.remove();
      }
      if (wpOrdinaryState.pdfRenderTask && typeof wpOrdinaryState.pdfRenderTask.cancel === 'function') {
        try { wpOrdinaryState.pdfRenderTask.cancel(); } catch (_) {}
      }
      if (wpOrdinaryState.pdfLazyIdleHandle) {
        if (wpOrdinaryState.pdfLazyIdleKind === 'idle'
          && typeof window.cancelIdleCallback === 'function') {
          window.cancelIdleCallback(wpOrdinaryState.pdfLazyIdleHandle);
        } else {
          clearTimeout(wpOrdinaryState.pdfLazyIdleHandle);
        }
      }
      wpOrdinaryState.pdfLazyIdleHandle = 0;
      wpOrdinaryState.pdfLazyIdleKind = '';
      if (wpOrdinaryState.pdfLoadingTask && typeof wpOrdinaryState.pdfLoadingTask.destroy === 'function') {
        try { wpOrdinaryState.pdfLoadingTask.destroy(); } catch (_) {}
      } else if (wpOrdinaryState.pdfDocument && typeof wpOrdinaryState.pdfDocument.destroy === 'function') {
        try { wpOrdinaryState.pdfDocument.destroy(); } catch (_) {}
      }
      wpOrdinaryState.kind = '';
      wpOrdinaryState.fileName = '';
      wpOrdinaryState.pageIndex = 0;
      wpOrdinaryState.pageCount = 0;
      wpOrdinaryState.pdfDocument = null;
      wpOrdinaryState.pdfLoadingTask = null;
      wpOrdinaryState.pdfRenderTask = null;
      wpOrdinaryState.pdfPageStages = [];
      wpOrdinaryState.pdfRenderedPages.clear();
      wpOrdinaryState.pdfPagePromises.clear();
      wpOrdinaryState.docxPages = [];
      wpOrdinaryState.docxWrapper = null;
      wpOrdinaryState.xlsxPages = [];
      wpOrdinaryState.xlsxRoot = null;
      wpOrdinaryState.xlsxSheetNames = [];
      wpOrdinaryState.xlsxWorkbook = null;
      if (wpOrdinaryState.xlsxTabBar instanceof HTMLElement) wpOrdinaryState.xlsxTabBar.remove();
      wpOrdinaryState.xlsxTabBar = null;
      wpOrdinaryState.xlsxScrollPositions.clear();
      presenter.classList.remove('has-xlsx-sheet-tabs');
      wpOrdinaryState.pptxPages = [];
      wpOrdinaryState.pptxRoot = null;
      wpOrdinaryState.pptxViewer = null;
      wpOrdinaryState.pptxMode = '';
      wpOrdinaryState.pptxSlidePlans = [];
      wpOrdinaryState.pptxBuildGroups = [];
      wpOrdinaryState.pptxBuildIndex = 0;
      wpOrdinaryState.pptxQueuedDirection = 0;
      wpOrdinaryState.pptxQueuedFullscreenOnSlideChange = false;
      wpOrdinaryState.pptxPlaybackActive = false;
      wpOrdinaryState.pptxPlaybackPaused = false;
      wpOrdinaryState.pptxThumbnails = [];
      wpOrdinaryState.pptxThumbnailPromise = null;
      wpOrdinaryState.pptxCacheKey = '';
      wpOrdinaryState.pptxRememberedPageIndex = -1;
      wpOrdinaryState.pptxPreloadedPages = [];
      wpOrdinaryState.pptxPreloadViewer = null;
      wpOrdinaryState.pptxPreloadHost = null;
      wpOrdinaryState.pptxPreloadRunning = false;
      wpOrdinaryState.pptxWheelLockUntil = 0;
      wpOrdinaryState.pptxSelectedTriggerShapeId = '';
      wpOrdinaryState.baseContentWidth = 0;
      if (wpOrdinaryState.scrollFrame) cancelAnimationFrame(wpOrdinaryState.scrollFrame);
      wpOrdinaryState.scrollFrame = 0;
      wpOrdinaryState.zoom = 1;
      wpOrdinaryState.panActive = false;
      wpOrdinaryState.panPointerId = null;
      wpOrdinaryState.panMoved = false;
      wpOrdinaryState.touchMode = '';
      wpOrdinaryState.touchStartDistance = 0;
      wpOrdinaryState.touchMoved = false;
      wpOrdinaryState.suppressClickUntil = 0;
      viewport.classList.remove('is-ordinary-zoomed', 'is-ordinary-panning');
      presenter.classList.remove('is-powerpoint-slide-mode', 'is-pptx-rendering', 'is-pptx-media-playing');
      powerPointControls.hidden = true;
      chooseQuestionBtn.textContent = 'Chọn câu';
      chooseQuestionBtn.title = 'Phóng to toàn màn hình và mở bảng chọn câu trình chiếu';
      const pickerTitle = document.getElementById('wordPresentationQuestionPickerTitle');
      if (pickerTitle instanceof HTMLElement) pickerTitle.textContent = 'Chọn câu trình chiếu';
    }

    function wpSetOrdinaryPresenterMode(active) {
      const enabled = !!active;
      wpState.documentMode = enabled ? 'ordinary' : 'questions';
      presenter.classList.toggle('is-ordinary-document', enabled);
      presenter.setAttribute('aria-label', enabled
        ? 'Trình chiếu tài liệu Word, PDF, Excel hoặc PowerPoint thông thường'
        : 'Trình chiếu câu hỏi word thành câu hỏi tương tác');
      if (closeBtn) {
        closeBtn.setAttribute('aria-label', enabled ? 'Đóng trình chiếu tài liệu' : 'Đóng trình chiếu Word');
        closeBtn.title = 'Đóng';
      }
      if (!enabled) card.classList.remove('ordinary-document-card');
    }

    function wpCloseWordOnlyPresentationTools() {
      wpSetScanSplit(false);
      wpResetRegionTool();
      wpCloseImageZoom();
      /* Khi đổi từ một kiểu trình chiếu khác về PowerPoint, bảng trắng có thể
         đã bị ẩn trước khi bộ chia đôi kịp chạy clearSplit(). Khi đó biến
         splitPresenter và độ rộng --mvip-whiteboard-split-left vẫn giữ kích
         thước cũ, làm lần fit PowerPoint sau chỉ vừa với một góc màn hình.
         Gọi đúng bộ dọn trung tâm trước; phần dự phòng bên dưới cũng xóa các
         class/biến CSS cũ nếu script bảng trắng chưa kịp khởi tạo. */
      try {
        if (typeof window.mvipClearWhiteboardSplit === 'function') {
          window.mvipClearWhiteboardSplit();
        }
      } catch (_) {}
      document.body.classList.remove('mvip-whiteboard-split-open');
      document.querySelectorAll('.mvip-whiteboard-split').forEach((node) => {
        node.classList.remove('mvip-whiteboard-split');
        if (node instanceof HTMLElement) {
          node.style.removeProperty('--mvip-whiteboard-split-left');
        }
      });
      presenter.style.removeProperty('--mvip-whiteboard-split-left');
      try {
        const inkTool = window.mvipWordInkTool;
        if (inkTool && typeof inkTool.tool === 'function') inkTool.tool('cursor');
      } catch (_) {}
      try {
        const geometryTool = window.mvipWordGeometryTool;
        if (geometryTool && typeof geometryTool.tool === 'function') geometryTool.tool('');
      } catch (_) {}
      const whiteboardPanel = document.getElementById('mvipWhiteboardPanel');
      const whiteboardCloseBtn = document.getElementById('mvipWhiteboardCloseBtn');
      if (whiteboardPanel instanceof HTMLElement && !whiteboardPanel.hidden
        && whiteboardCloseBtn instanceof HTMLButtonElement) {
        try { whiteboardCloseBtn.click(); } catch (_) {}
      }
      presenter.classList.remove('mvip-whiteboard-split', 'is-ink-active');
    }

    function wpOrdinaryAvailableSize() {
      return {
        width: Math.max(160, Number(viewport.clientWidth) || window.innerWidth || 800),
        height: Math.max(160, Number(viewport.clientHeight) || window.innerHeight || 600),
      };
    }

    function wpOrdinaryPageElements() {
      if (wpOrdinaryState.kind === 'pdf') {
        return wpOrdinaryState.pdfPageStages.filter((page) => page instanceof HTMLElement);
      }
      if (wpOrdinaryState.kind === 'docx') {
        return wpOrdinaryState.docxPages.filter((page) => page instanceof HTMLElement);
      }
      if (wpOrdinaryState.kind === 'xlsx') {
        return wpOrdinaryState.xlsxPages.filter((page) => page instanceof HTMLElement);
      }
      if (wpOrdinaryState.kind === 'pptx') {
        return wpOrdinaryState.pptxPages.filter((page) => page instanceof HTMLElement);
      }
      if (wpOrdinaryState.kind === 'pptx-slide') {
        return wpOrdinaryState.pptxPages.filter((page) => page instanceof HTMLElement);
      }
      return [];
    }

    function wpCreateOrdinarySeparator() {
      const separator = document.createElement('div');
      separator.className = 'ordinary-document-page-separator';
      separator.setAttribute('aria-hidden', 'true');
      return separator;
    }

    function wpUpdateOrdinaryPanUi() {
      const canPan = wpState.documentMode === 'ordinary'
        && wpOrdinaryState.zoom > 1.001
        && (viewport.scrollWidth > viewport.clientWidth + 1
          || viewport.scrollHeight > viewport.clientHeight + 1);
      viewport.classList.toggle('is-ordinary-zoomed', canPan);
      if (!canPan) {
        wpOrdinaryState.panActive = false;
        wpOrdinaryState.panPointerId = null;
        viewport.classList.remove('is-ordinary-panning');
      }
    }

    /* slideSize đọc trực tiếp từ PPTX dùng EMU, còn PptxViewer trả về pixel.
       Trước đây đường dự phòng luôn chia cả hai loại cho 9525 nên khi phần
       phân tích XML không có kế hoạch của một slide, khung 1280x720 bị hiểu
       thành khoảng 0,13x0,08 px rồi ép lên 160x90. Bộ dựng vẫn giữ nội dung
       theo kích thước gốc và người dùng chỉ nhìn thấy một góc. */
    function wpPowerPointLengthPx(value, fallback) {
      const number = Number(value);
      if (!Number.isFinite(number) || number <= 0) return Math.max(1, Number(fallback) || 1);
      return number >= 100000 ? number / 9525 : number;
    }

    function wpPowerPointSourcePixels(root, sourceSize, viewer) {
      const storedWidth = Number(root && root.dataset.pptxSourceWidthPx) || 0;
      const storedHeight = Number(root && root.dataset.pptxSourceHeightPx) || 0;
      const sourceWidth = Number(sourceSize && sourceSize.width) || 0;
      const sourceHeight = Number(sourceSize && sourceSize.height) || 0;
      const viewerWidth = Number(viewer && viewer.slideWidth) || 0;
      const viewerHeight = Number(viewer && viewer.slideHeight) || 0;
      const viewerWidthPx = wpPowerPointLengthPx(viewerWidth, 0);
      const viewerHeightPx = wpPowerPointLengthPx(viewerHeight, 0);
      const width = sourceWidth > 0
        ? wpPowerPointLengthPx(sourceWidth, storedWidth || 1280)
        : (viewerWidthPx >= 160 ? viewerWidthPx : (storedWidth || 1280));
      const height = sourceHeight > 0
        ? wpPowerPointLengthPx(sourceHeight, storedHeight || 720)
        : (viewerHeightPx >= 90 ? viewerHeightPx : (storedHeight || 720));
      return {
        width:Math.max(160, width),
        height:Math.max(90, height),
      };
    }

    function wpCenterFittedPowerPointSlide() {
      if (wpOrdinaryState.kind !== 'pptx-slide'
        || Number(wpOrdinaryState.zoom) > 1.001) return;
      const reset = () => {
        if (wpOrdinaryState.kind !== 'pptx-slide'
          || Number(wpOrdinaryState.zoom) > 1.001) return;
        viewport.scrollLeft = 0;
        viewport.scrollTop = 0;
      };
      /* Flex/zoom và việc đổi từ toàn màn hình sang chia đôi có thể hoàn tất
         sau một lần vẽ. Đặt lại ngay và thêm hai khung hình ngắn để không giữ
         scrollLeft/scrollTop của kích thước cũ. */
      reset();
      requestAnimationFrame(() => {
        reset();
        requestAnimationFrame(reset);
      });
    }

    function wpSettleOpenedPowerPointFit(root) {
      if (!(root instanceof HTMLElement)) return;
      const refit = () => {
        if (wpOrdinaryState.kind !== 'pptx-slide'
          || wpOrdinaryState.pptxRoot !== root || !root.isConnected) return;
        wpFitOrdinaryPage();
      };
      requestAnimationFrame(refit);
      /* Việc rời Bài giảng/MVIP/chia đôi có thể hoàn tất sau khi file PPTX đã
         dựng xong (fullscreenchange, đóng bảng trắng và bảng quét đều chạy
         bất đồng bộ). Tiếp tục chốt fit trong khoảng ngắn của lần mở, để lần
         thứ hai cũng lấy đúng kích thước cuối thay vì giữ tỉ lệ của chế độ cũ. */
      [60, 140, 280, 520, 900, 1400, 2200].forEach((delay) => setTimeout(refit, delay));
    }

    function wpFitOrdinaryPage() {
      if (wpState.documentMode !== 'ordinary' || presenter.hidden) return;
      const available = wpOrdinaryAvailableSize();
      const zoom = Math.max(wpOrdinaryState.minZoom,
        Math.min(wpOrdinaryState.maxZoom, Number(wpOrdinaryState.zoom) || 1));
      const documentWidth = Math.max(available.width, available.width * zoom);
      const host = card.querySelector('.ordinary-document-page-host');
      if (host instanceof HTMLElement) {
        host.style.width = `${documentWidth}px`;
        host.style.minWidth = `${documentWidth}px`;
        host.style.flex = '0 0 auto';
      }

      if (wpOrdinaryState.kind === 'pdf') {
        wpOrdinaryState.pdfPageStages.forEach((stage) => {
          if (!(stage instanceof HTMLElement)) return;
          const canvas = stage.querySelector('.ordinary-pdf-page-canvas');
          if (!(canvas instanceof HTMLCanvasElement)) return;
          const baseWidth = Math.max(1, Number(canvas.dataset.baseWidth) || 1);
          const baseHeight = Math.max(1, Number(canvas.dataset.baseHeight) || 1);
          const displayWidth = available.width * zoom;
          const displayHeight = Math.max(1, displayWidth * baseHeight / baseWidth);
          stage.style.width = `${displayWidth}px`;
          stage.style.height = `${displayHeight}px`;
          canvas.style.width = '100%';
          canvas.style.height = `${displayHeight}px`;
        });
        wpUpdateOrdinaryPanUi();
        return;
      }

      if (wpOrdinaryState.kind === 'xlsx') {
        const root = wpOrdinaryState.xlsxRoot;
        if (!(root instanceof HTMLElement)) return;
        const baseWidth = Math.max(1, Number(wpOrdinaryState.baseContentWidth)
          || Number(root.scrollWidth) || available.width);
        /* Excel giữ kích thước tự nhiên ở mức 100%. Không co cả trang tính
           vào bề rộng màn hình: nếu bảng rộng hoặc dài, chính viewport sẽ
           xuất hiện thanh cuộn như Excel. Nút/phím zoom vẫn phóng đồng đều. */
        const displayScale = zoom;
        root.style.width = `${baseWidth}px`;
        root.style.zoom = String(displayScale);
        const scaledWidth = Math.max(available.width, baseWidth * displayScale);
        if (host instanceof HTMLElement) {
          host.style.width = `${scaledWidth}px`;
          host.style.minWidth = `${scaledWidth}px`;
        }
        wpUpdateOrdinaryPanUi();
        return;
      }

      if (wpOrdinaryState.kind === 'pptx' || wpOrdinaryState.kind === 'pptx-slide') {
        const root = wpOrdinaryState.pptxRoot;
        if (!(root instanceof HTMLElement)) return;
        const viewer = wpOrdinaryState.pptxViewer;
        const sourceSize = wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex]
          && wpOrdinaryState.pptxSlidePlans[wpOrdinaryState.pageIndex].slideSize;
        if (wpOrdinaryState.kind === 'pptx-slide') {
          const sourcePixels = wpPowerPointSourcePixels(root, sourceSize, viewer);
          const sourceWidthPx = sourcePixels.width;
          const sourceHeightPx = sourcePixels.height;
          root.dataset.pptxSourceWidthPx = String(sourceWidthPx);
          root.dataset.pptxSourceHeightPx = String(sourceHeightPx);
          const fitScale = Math.max(.05, Math.min(
            available.width / sourceWidthPx,
            available.height / sourceHeightPx
          ));
          const displayScale = fitScale * zoom;
          const stage = root.parentElement instanceof HTMLElement
            && root.parentElement.classList.contains('ordinary-pptx-slide-stage')
            ? root.parentElement : null;
          wpOrdinaryState.baseContentWidth = sourceWidthPx;
          root.style.width = `${sourceWidthPx}px`;
          root.style.height = `${sourceHeightPx}px`;
          root.style.aspectRatio = `${sourceWidthPx} / ${sourceHeightPx}`;
          /* Không zoom trực tiếp renderRoot: PptxViewer và transition cùng
             thao tác trên cây này. Stage ngoài giữ một phép scale duy nhất,
             ổn định cả ở lần mở đầu và các lần mở lại. */
          root.style.zoom = '1';
          if (stage instanceof HTMLElement) {
            stage.style.width = `${sourceWidthPx}px`;
            stage.style.height = `${sourceHeightPx}px`;
            stage.style.transform = `translate(-50%, -50%) scale(${displayScale})`;
          } else {
            root.style.zoom = String(displayScale);
          }
          if (host instanceof HTMLElement) {
            const scaledWidth = sourceWidthPx * displayScale;
            const scaledHeight = sourceHeightPx * displayScale;
            host.style.width = `${Math.max(available.width, scaledWidth)}px`;
            host.style.minWidth = `${Math.max(available.width, scaledWidth)}px`;
            host.style.height = `${Math.max(available.height, scaledHeight)}px`;
            host.style.minHeight = `${Math.max(available.height, scaledHeight)}px`;
            host.style.position = 'relative';
            host.style.display = 'block';
          }
          wpUpdateOrdinaryPanUi();
          wpCenterFittedPowerPointSlide();
          return;
        }
        const baseWidth = Math.max(available.width, Number(wpOrdinaryState.baseContentWidth) || available.width);
        root.style.width = `${baseWidth}px`;
        root.style.height = '';
        root.style.aspectRatio = '';
        root.style.zoom = String(zoom);
        const scaledWidth = Math.max(available.width, baseWidth * zoom);
        if (host instanceof HTMLElement) {
          host.style.width = `${scaledWidth}px`;
          host.style.minWidth = `${scaledWidth}px`;
        }
        wpUpdateOrdinaryPanUi();
        return;
      }

      if (wpOrdinaryState.kind !== 'docx' || !wpOrdinaryState.docxPages.length) return;
      const wrapper = wpOrdinaryState.docxWrapper;
      if (!(wrapper instanceof HTMLElement)) return;
      wrapper.style.setProperty('width', `${available.width * zoom}px`, 'important');
      wrapper.style.height = 'auto';
      wrapper.style.overflow = 'visible';

      wpOrdinaryState.docxPages.forEach((page) => {
        if (!(page instanceof HTMLElement)) return;
        page.style.display = 'block';
        page.style.visibility = 'visible';
        page.style.position = 'relative';
        page.style.left = '0';
        page.style.top = '0';
        page.style.transform = 'none';
        if (!page.dataset.ordinaryBaseWidth) {
          page.style.zoom = '1';
          const baseWidth = Math.max(1, Number(page.offsetWidth)
            || Math.ceil(page.getBoundingClientRect().width) || 1);
          const baseHeight = Math.max(1, Number(page.offsetHeight)
            || Math.ceil(page.getBoundingClientRect().height) || 1);
          page.dataset.ordinaryBaseWidth = String(baseWidth);
          page.dataset.ordinaryBaseHeight = String(baseHeight);
        }
        const baseWidth = Math.max(1, Number(page.dataset.ordinaryBaseWidth) || 1);
        const widthScale = Math.max(.08, Math.min(8, available.width * zoom / baseWidth));
        page.style.zoom = String(widthScale);
      });
      wpUpdateOrdinaryPanUi();
    }

    function wpCreateSpreadsheetSheetTabs(sheetNames) {
      if (wpOrdinaryState.xlsxTabBar instanceof HTMLElement) wpOrdinaryState.xlsxTabBar.remove();
      const names = Array.isArray(sheetNames) ? sheetNames : [];
      const tabBar = document.createElement('div');
      tabBar.className = 'ordinary-xlsx-sheet-tabs';
      tabBar.setAttribute('role', 'tablist');
      tabBar.setAttribute('aria-label', 'Chọn sheet Excel');
      names.forEach((sheetName, index) => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'ordinary-xlsx-sheet-tab';
        button.dataset.xlsxSheetIndex = String(index);
        button.setAttribute('role', 'tab');
        button.setAttribute('aria-controls', `ordinaryExcelSheetPanel${index + 1}`);
        button.setAttribute('aria-selected', index === 0 ? 'true' : 'false');
        button.tabIndex = index === 0 ? 0 : -1;
        button.textContent = String(sheetName || `Sheet ${index + 1}`);
        button.title = `Mở sheet ${button.textContent}`;
        button.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          wpShowSpreadsheetSheet(index, { focusTab: true });
        });
        button.addEventListener('keydown', (event) => {
          let targetIndex = index;
          if (event.key === 'ArrowRight') targetIndex = Math.min(names.length - 1, index + 1);
          else if (event.key === 'ArrowLeft') targetIndex = Math.max(0, index - 1);
          else if (event.key === 'Home') targetIndex = 0;
          else if (event.key === 'End') targetIndex = names.length - 1;
          else return;
          event.preventDefault();
          event.stopPropagation();
          wpShowSpreadsheetSheet(targetIndex, { focusTab: true });
        });
        tabBar.appendChild(button);
      });
      presenter.appendChild(tabBar);
      presenter.classList.add('has-xlsx-sheet-tabs');
      wpOrdinaryState.xlsxTabBar = tabBar;
      return tabBar;
    }

    function wpShowSpreadsheetSheet(index, options = {}) {
      if (wpOrdinaryState.kind !== 'xlsx') return false;
      const pages = wpOrdinaryState.xlsxPages.filter((page) => page instanceof HTMLElement);
      if (!pages.length) return false;
      const safeIndex = Math.max(0, Math.min(Number(index) || 0, pages.length - 1));
      const previousIndex = Math.max(0, Math.min(
        Number(wpOrdinaryState.pageIndex) || 0, pages.length - 1
      ));
      if (!options.initial) {
        wpOrdinaryState.xlsxScrollPositions.set(previousIndex, {
          top: Math.max(0, Number(viewport.scrollTop) || 0),
          left: Math.max(0, Number(viewport.scrollLeft) || 0),
        });
      }
      pages.forEach((page, pageIndex) => {
        const active = pageIndex === safeIndex;
        page.hidden = !active;
        page.classList.toggle('is-active-sheet', active);
        page.setAttribute('aria-hidden', active ? 'false' : 'true');
        page.tabIndex = active ? 0 : -1;
      });
      const activePage = pages[safeIndex];
      wpOrdinaryState.pageIndex = safeIndex;
      wpOrdinaryState.baseContentWidth = Math.max(1,
        Number(activePage.dataset.xlsxBaseWidth) || Number(activePage.scrollWidth) || 1);
      if (wpOrdinaryState.xlsxRoot instanceof HTMLElement) {
        wpOrdinaryState.xlsxRoot.style.width = `${wpOrdinaryState.baseContentWidth}px`;
      }
      const tabBar = wpOrdinaryState.xlsxTabBar;
      if (tabBar instanceof HTMLElement) {
        const buttons = Array.from(tabBar.querySelectorAll('.ordinary-xlsx-sheet-tab'));
        buttons.forEach((button, buttonIndex) => {
          const selected = buttonIndex === safeIndex;
          button.setAttribute('aria-selected', selected ? 'true' : 'false');
          button.tabIndex = selected ? 0 : -1;
        });
        const activeButton = buttons[safeIndex];
        if (activeButton instanceof HTMLButtonElement) {
          const left = Number(activeButton.offsetLeft) || 0;
          const right = left + (Number(activeButton.offsetWidth) || 0);
          if (left < tabBar.scrollLeft) tabBar.scrollLeft = left;
          else if (right > tabBar.scrollLeft + tabBar.clientWidth) {
            tabBar.scrollLeft = Math.max(0, right - tabBar.clientWidth);
          }
          if (options.focusTab) {
            try { activeButton.focus({ preventScroll: true }); } catch (_) { activeButton.focus(); }
          }
        }
      }
      wpSyncOrdinaryPageUi();
      wpFitOrdinaryPage();
      const saved = wpOrdinaryState.xlsxScrollPositions.get(safeIndex) || { top: 0, left: 0 };
      requestAnimationFrame(() => {
        viewport.scrollTop = Math.max(0, Number(saved.top) || 0);
        viewport.scrollLeft = Math.max(0, Number(saved.left) || 0);
        wpUpdateOrdinaryPanUi();
      });
      return true;
    }

    function wpSyncOrdinaryPageUi() {
      const pageNumber = wpOrdinaryState.pageCount ? wpOrdinaryState.pageIndex + 1 : 0;
      if (titleEl) titleEl.textContent = wpOrdinaryState.fileName
        ? `${wpOrdinaryState.kind === 'pptx-slide' ? 'Trình chiếu PowerPoint' : 'Trình chiếu tài liệu'} · ${wpOrdinaryState.fileName}`
        : (wpOrdinaryState.kind === 'pptx-slide' ? 'Trình chiếu PowerPoint' : 'Trình chiếu tài liệu');
      if (progressEl) {
        const sheetName = wpOrdinaryState.kind === 'xlsx'
          ? String(wpOrdinaryState.xlsxSheetNames[wpOrdinaryState.pageIndex] || `Sheet ${pageNumber}`)
          : '';
        progressEl.textContent = wpOrdinaryState.pageCount
          ? `${wpOrdinaryState.kind === 'xlsx' ? `Sheet ${sheetName} · ${pageNumber}/${wpOrdinaryState.pageCount}` : `Trang ${pageNumber}/${wpOrdinaryState.pageCount}`} · ${Math.round(wpOrdinaryState.zoom * 100)}%${wpOrdinaryState.kind === 'pptx-slide' && wpOrdinaryState.pptxBuildGroups.length ? ` · Hiệu ứng ${Math.min(wpOrdinaryState.pptxBuildIndex, wpOrdinaryState.pptxBuildGroups.length)}/${wpOrdinaryState.pptxBuildGroups.length}` : ''}`
          : WP_PRESENTATION_LOADING_TEXT;
      }
      if (typeEl) {
        const typeLabels = { pdf: 'PDF', docx: 'Word', xlsx: 'Excel', pptx: 'PowerPoint', 'pptx-slide': 'PowerPoint' };
        typeEl.textContent = typeLabels[wpOrdinaryState.kind] || 'Tài liệu';
      }
      const isPowerPointSlides = wpOrdinaryState.kind === 'pptx-slide';
      const hasPendingBuild = isPowerPointSlides
        && wpOrdinaryState.pptxBuildIndex < wpOrdinaryState.pptxBuildGroups.length;
      if (prevBtn) prevBtn.disabled = isPowerPointSlides
        ? wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageIndex - 1, -1) < 0 && wpOrdinaryState.pptxBuildIndex <= 0
        : pageNumber <= 1;
      if (nextBtn) nextBtn.disabled = !wpOrdinaryState.pageCount
        || ((isPowerPointSlides ? wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageIndex + 1) < 0
          : pageNumber >= wpOrdinaryState.pageCount) && !hasPendingBuild);
      if (prevBtn) {
        const label = wpOrdinaryState.kind === 'xlsx' ? 'Sheet trước' : 'Trang trước';
        prevBtn.setAttribute('aria-label', label);
        prevBtn.title = label;
      }
      if (nextBtn) {
        const label = wpOrdinaryState.kind === 'xlsx' ? 'Sheet tiếp theo' : 'Trang tiếp theo';
        nextBtn.setAttribute('aria-label', label);
        nextBtn.title = label;
      }
      const zoomButtonsActive = wpState.documentMode === 'ordinary'
        && wpOrdinaryState.kind !== 'pptx-slide' && !presenter.hidden;
      if (zoomOutBtn) zoomOutBtn.disabled = !zoomButtonsActive
        || wpOrdinaryState.zoom <= wpOrdinaryState.minZoom + .001;
      if (zoomInBtn) zoomInBtn.disabled = !zoomButtonsActive
        || wpOrdinaryState.zoom >= wpOrdinaryState.maxZoom - .001;
      wpSyncPowerPointControls();
    }

    function wpUpdateOrdinaryPageFromScroll() {
      wpOrdinaryState.scrollFrame = 0;
      if (wpState.documentMode !== 'ordinary' || presenter.hidden) return;
      if (wpOrdinaryState.kind === 'pptx-slide' || wpOrdinaryState.kind === 'xlsx') return;
      const pages = wpOrdinaryPageElements();
      if (!pages.length) return;
      const viewportRect = viewport.getBoundingClientRect();
      const targetY = viewportRect.top + Math.min(48, viewportRect.height * .12);
      let nextIndex = pages.length - 1;
      for (let index = 0; index < pages.length; index += 1) {
        const rect = pages[index].getBoundingClientRect();
        if (rect.bottom > targetY) {
          nextIndex = index;
          break;
        }
      }
      if (nextIndex !== wpOrdinaryState.pageIndex) {
        wpOrdinaryState.pageIndex = nextIndex;
        wpSyncOrdinaryPageUi();
      }
      if (wpOrdinaryState.kind === 'pdf'
          && !wpOrdinaryState.pdfRenderedPages.has(nextIndex)) {
        void wpRenderOrdinaryPdfPage(nextIndex).catch(() => {});
      }
    }

    function wpScheduleOrdinaryPageFromScroll() {
      if (wpState.documentMode !== 'ordinary' || wpOrdinaryState.scrollFrame) return;
      if (wpOrdinaryState.kind === 'pptx-slide' || wpOrdinaryState.kind === 'xlsx') return;
      wpOrdinaryState.scrollFrame = requestAnimationFrame(wpUpdateOrdinaryPageFromScroll);
    }

    function wpScrollOrdinaryPage(index, smooth = true) {
      const pages = wpOrdinaryPageElements();
      if (!pages.length) return;
      const safeIndex = Math.max(0, Math.min(Number(index) || 0, pages.length - 1));
      const page = pages[safeIndex];
      const viewportRect = viewport.getBoundingClientRect();
      const pageRect = page.getBoundingClientRect();
      const targetTop = Math.max(0, viewport.scrollTop + pageRect.top - viewportRect.top);
      wpOrdinaryState.pageIndex = safeIndex;
      wpSyncOrdinaryPageUi();
      try { viewport.scrollTo({ top: targetTop, left: 0, behavior: smooth ? 'smooth' : 'auto' }); }
      catch (_) { viewport.scrollTop = targetTop; }
    }

    function wpFollowDocumentBookmark(href, anchor) {
      let name = String(href || '').replace(/^#/, '');
      try { name = decodeURIComponent(name); } catch (_) {}
      if (wpOrdinaryState.kind === 'xlsx') {
        const names = wpOrdinaryState.xlsxWorkbook && wpOrdinaryState.xlsxWorkbook.Workbook && wpOrdinaryState.xlsxWorkbook.Workbook.Names || [];
        const defined = names.find(item => item.Name === name && (item.Sheet == null
          || Number(item.Sheet) === Number(wpOrdinaryState.xlsxPages[wpOrdinaryState.pageIndex]?.dataset.xlsxWorkbookSheetIndex)));
        if (defined) name = String(defined.Ref || name).replace(/^#|^=/, '');
        const match = name.match(/^(?:(?:'((?:[^']|'')+)'|([^!]+))!)?(\$?[A-Z]+\$?\d+)(?::\$?[A-Z]+\$?\d+)?$/i);
        if (!match) return false;
        const sheetName = (match[1] || match[2] || '').replace(/''/g, "'");
        const pages = wpOrdinaryState.xlsxPages;
        const index = sheetName ? pages.findIndex(page => page.dataset.xlsxSheetName === sheetName) : wpOrdinaryState.pageIndex;
        if (index < 0 || !pages[index]) return false;
        wpShowSpreadsheetSheet(index);
        const address = match[3].replace(/\$/g, '').toUpperCase();
        const cell = Array.from(pages[index].querySelectorAll('[data-xlsx-address]')).find(node => node.dataset.xlsxAddress === address);
        if (cell) requestAnimationFrame(() => cell.scrollIntoView({ block:'center', inline:'center' }));
        return !!cell;
      }
      const root = anchor && anchor.closest('.ordinary-docx-render') || card;
      const destination = Array.from(root.querySelectorAll('[id], [name]')).find(node => node.id === name || node.getAttribute('name') === name);
      if (!destination) return false;
      destination.scrollIntoView({ block:'center', inline:'nearest' });
      return true;
    }
    window.mvipFollowDocumentBookmark = wpFollowDocumentBookmark;

    function wpSpreadsheetCellHyperlink(cell, sheet, workbook) {
      if (!cell) return '';
      if (cell.l && cell.l.Target) return String(cell.l.Target);
      const formula = String(cell.f || '').trim().replace(/^=/, '').replace(/^_xlfn\./i, '');
      // Resolve a literal URL or a cell reference; never eval workbook formulas.
      const match = formula.match(/^HYPERLINK\s*\(\s*("(?:[^"]|"")*"|(?:'[^']*(?:''[^']*)*'|[^!,;()]+)!\$?[A-Z]+\$?\d+|\$?[A-Z]+\$?\d+)\s*[,;)]/i);
      if (!match) return '';
      const argument = match[1].trim();
      if (argument[0] === '"') return argument.slice(1, -1).replace(/""/g, '"');
      const split = argument.lastIndexOf('!');
      const sheetName = split < 0 ? '' : argument.slice(0, split).replace(/^'|'$/g, '').replace(/''/g, "'");
      const sourceSheet = sheetName ? workbook && workbook.Sheets && workbook.Sheets[sheetName] : sheet;
      const source = sourceSheet && sourceSheet[argument.slice(split + 1).replace(/\$/g, '').toUpperCase()];
      return source && source.v != null ? String(source.v) : '';
    }

    async function wpRenderPdfHyperlinks(page, stage, baseViewport, token) {
      const pdf = wpOrdinaryState.pdfDocument;
      const annotations = await page.getAnnotations({ intent:'display' });
      if (token !== wpOrdinaryState.renderToken || pdf !== wpOrdinaryState.pdfDocument) return;
      stage.querySelectorAll('.mvip-pdf-link-layer').forEach(node => node.remove());
      const layer = document.createElement('div');
      layer.className = 'mvip-pdf-link-layer';
      for (const item of annotations) {
        if (item.subtype !== 'Link' || !Array.isArray(item.rect) || item.rect.length !== 4) continue;
        const href = mvipSafeHyperlink(item.url || item.unsafeUrl || '');
        const internal = item.dest || item.action;
        if (!href && !internal) continue;
        const rect = baseViewport.convertToViewportRectangle(item.rect);
        if (!rect.every(Number.isFinite)) continue;
        const anchor = document.createElement('a');
        anchor.className = 'mvip-pdf-hyperlink';
        anchor.style.left = `${100 * Math.min(rect[0], rect[2]) / baseViewport.width}%`;
        anchor.style.top = `${100 * Math.min(rect[1], rect[3]) / baseViewport.height}%`;
        anchor.style.width = `${100 * Math.abs(rect[2] - rect[0]) / baseViewport.width}%`;
        anchor.style.height = `${100 * Math.abs(rect[3] - rect[1]) / baseViewport.height}%`;
        anchor.setAttribute('aria-label', item.title || href || 'Đi tới vị trí liên kết trong PDF');
        anchor.title = href || 'Đi tới vị trí liên kết trong PDF';
        if (href) mvipSetDocumentLink(anchor, href);
        else {
          anchor.href = '#';
          anchor.dataset.mvipInternalAction = 'pdf';
          anchor.addEventListener('click', async event => {
            event.preventDefault(); event.stopPropagation();
            if (pdf !== wpOrdinaryState.pdfDocument) return;
            let index = -1;
            try {
              let destination = item.dest;
              if (typeof destination === 'string') destination = await pdf.getDestination(destination);
              if (Array.isArray(destination)) index = typeof destination[0] === 'number' ? destination[0] : await pdf.getPageIndex(destination[0]);
              else if (item.action === 'NextPage') index = wpOrdinaryState.pageIndex + 1;
              else if (item.action === 'PrevPage') index = wpOrdinaryState.pageIndex - 1;
              else if (item.action === 'FirstPage') index = 0;
              else if (item.action === 'LastPage') index = wpOrdinaryState.pageCount - 1;
              if (pdf === wpOrdinaryState.pdfDocument && index >= 0) wpRenderOrdinaryPage(index);
            } catch (error) { console.warn('Không mở được vị trí liên kết PDF:', error); }
          });
        }
        layer.appendChild(anchor);
      }
      stage.appendChild(layer);
    }

    function wpApplyPowerPointHyperlinkUnderline(anchor, entry) {
      const underline = String(entry.underline || 'sng').toLowerCase();
      const previous = `${anchor.style.textDecorationLine || ''} ${anchor.style.textDecoration || ''}`;
      const lines = ['line-through', 'overline'].filter(line => previous.includes(line));
      if (underline !== 'none') lines.unshift('underline');
      anchor.style.textDecorationLine = lines.join(' ') || 'none';
      anchor.style.textDecorationStyle = underline === 'dbl' ? 'double'
        : underline.includes('wavy') ? 'wavy'
        : underline.includes('dash') ? 'dashed'
        : underline.includes('dotted') ? 'dotted' : 'solid';
      if (!anchor.style.textDecorationColor) anchor.style.textDecorationColor = 'currentColor';
    }

    function wpPowerPointTextHyperlinks(host, entry, makeAnchor, claimedNativeLinks = new Set()) {
      if (!entry.textLink || !(host instanceof Element)) return false;
      const normalize = value => String(value || '').replace(/\s+/g, ' ').trim();
      const href = wpPowerPointSafeHref(entry.href);
      // pptx-renderer already creates an <a> for many source runs. The old
      // text walker skipped it and added an empty overlay, leaving its text
      // unstyled. Reuse the actual rendered anchor instead of wrapping it.
      const nativeLink = Array.from(host.querySelectorAll('a[href], [role="link"]')).find(link => {
        if (claimedNativeLinks.has(link) || link.classList.contains('pptx-native-link-overlay')
          || (link.classList.contains('mvip-pptx-text-link') && !link.hasAttribute('data-mvip-pptx-native-link'))
          || normalize(link.textContent) !== normalize(entry.label)) return false;
        return href ? wpPowerPointSafeHref(link.getAttribute('href')) === href
          : !link.hasAttribute('href') && Number(entry.slideIndex) >= 0;
      });
      if (nativeLink) {
        claimedNativeLinks.add(nativeLink);
        nativeLink.dataset.mvipPptxNativeLink = '1';
        nativeLink.classList.add('mvip-pptx-text-link');
        wpApplyPowerPointHyperlinkUnderline(nativeLink, entry);
        return true;
      }
      const nodes = [], walker = document.createTreeWalker(host, NodeFilter.SHOW_TEXT);
      let joined = '';
      while (walker.nextNode()) {
        const node = walker.currentNode;
        if (node.parentElement.closest('a, .pptx-native-interaction-layer')) continue;
        nodes.push({ node, start:joined.length, end:joined.length + node.length });
        joined += node.nodeValue;
      }
      const label = String(entry.label || '');
      const start = joined.indexOf(label);
      if (!label || start < 0) return false;
      const end = start + label.length;
      nodes.filter(item => item.end > start && item.start < end).reverse().forEach(item => {
        let text = item.node;
        const from = Math.max(0, start - item.start), to = Math.min(text.length, end - item.start);
        if (to < text.length) text.splitText(to);
        if (from > 0) text = text.splitText(from);
        const anchor = makeAnchor();
        anchor.classList.remove('pptx-native-link-overlay');
        anchor.classList.add('mvip-pptx-text-link');
        wpApplyPowerPointHyperlinkUnderline(anchor, entry);
        text.replaceWith(anchor); anchor.appendChild(text);
      });
      return true;
    }

    async function wpRenderOrdinaryPdfPage(index, token = wpOrdinaryState.renderToken) {
      const pdfDocument = wpOrdinaryState.pdfDocument;
      const safeIndex = Math.max(0, Math.min(Number(index) || 0, wpOrdinaryState.pageCount - 1));
      if (!pdfDocument || token !== wpOrdinaryState.renderToken) return false;
      if (wpOrdinaryState.pdfRenderedPages.has(safeIndex)) return true;
      const pending = wpOrdinaryState.pdfPagePromises.get(safeIndex);
      if (pending) return pending;
      const promise = (async () => {
        const stage = wpOrdinaryState.pdfPageStages[safeIndex];
        const canvas = stage && stage.querySelector('.ordinary-pdf-page-canvas');
        if (!(stage instanceof HTMLElement) || !(canvas instanceof HTMLCanvasElement)) return false;
        const page = await pdfDocument.getPage(safeIndex + 1);
        if (token !== wpOrdinaryState.renderToken) return false;
        const baseViewport = page.getViewport({ scale: 1 });
        const available = wpOrdinaryAvailableSize();
        const displayScale = Math.max(.08, available.width / Math.max(1, baseViewport.width));
        const pixelRatio = Math.max(1, Number(window.devicePixelRatio) || 1);
        const renderScale = Math.max(1, Math.min(3.5, displayScale * pixelRatio));
        const renderViewport = page.getViewport({ scale: renderScale });
        canvas.width = Math.max(1, Math.ceil(renderViewport.width));
        canvas.height = Math.max(1, Math.ceil(renderViewport.height));
        canvas.dataset.baseWidth = String(baseViewport.width);
        canvas.dataset.baseHeight = String(baseViewport.height);
        stage.dataset.pdfLoaded = 'false';
        const context = canvas.getContext('2d', { alpha: false });
        if (!context) throw new Error('Trình duyệt không tạo được vùng hiển thị PDF.');
        context.fillStyle = '#ffffff';
        context.fillRect(0, 0, canvas.width, canvas.height);
        const renderTask = page.render({ canvasContext: context, viewport: renderViewport });
        wpOrdinaryState.pdfRenderTask = renderTask;
        try {
          await renderTask.promise;
        } catch (error) {
          if (!error || error.name !== 'RenderingCancelledException') throw error;
          return false;
        } finally {
          if (wpOrdinaryState.pdfRenderTask === renderTask) wpOrdinaryState.pdfRenderTask = null;
        }
        if (token !== wpOrdinaryState.renderToken) return false;
        try { await wpRenderPdfHyperlinks(page, stage, baseViewport, token); }
        catch (error) { console.warn('Không đọc được một số liên kết PDF:', error); }
        if (token !== wpOrdinaryState.renderToken) return false;
        wpOrdinaryState.pdfRenderedPages.add(safeIndex);
        stage.dataset.pdfLoaded = 'true';
        wpFitOrdinaryPage();
        return true;
      })().finally(() => {
        wpOrdinaryState.pdfPagePromises.delete(safeIndex);
      });
      wpOrdinaryState.pdfPagePromises.set(safeIndex, promise);
      return promise;
    }

    function wpScheduleOrdinaryPdfIdlePages(token) {
      if (token !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'pdf') return;
      const nextIndex = Array.from({ length: wpOrdinaryState.pageCount }, (_, index) => index)
        .find((index) => index >= 2
          && !wpOrdinaryState.pdfRenderedPages.has(index)
          && !wpOrdinaryState.pdfPagePromises.has(index));
      if (!Number.isInteger(nextIndex)) return;
      const run = async () => {
        wpOrdinaryState.pdfLazyIdleHandle = 0;
        wpOrdinaryState.pdfLazyIdleKind = '';
        if (token !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'pdf') return;
        try { await wpRenderOrdinaryPdfPage(nextIndex, token); }
        catch (error) { console.warn(`Không dựng được trang PDF ${nextIndex + 1}:`, error); }
        if (token === wpOrdinaryState.renderToken && wpOrdinaryState.kind === 'pdf') {
          wpScheduleOrdinaryPdfIdlePages(token);
        }
      };
      if (typeof window.requestIdleCallback === 'function') {
        wpOrdinaryState.pdfLazyIdleKind = 'idle';
        wpOrdinaryState.pdfLazyIdleHandle = window.requestIdleCallback(() => { void run(); }, { timeout: 450 });
      } else {
        wpOrdinaryState.pdfLazyIdleKind = 'timer';
        wpOrdinaryState.pdfLazyIdleHandle = setTimeout(() => { void run(); }, 90);
      }
    }

    async function wpRenderOrdinaryPdfDocument() {
      const pdfDocument = wpOrdinaryState.pdfDocument;
      if (!pdfDocument) return;
      const token = ++wpOrdinaryState.renderToken;
      card.innerHTML = '<div class="ordinary-document-page-host"></div>';
      const host = card.querySelector('.ordinary-document-page-host');
      if (!(host instanceof HTMLElement)) throw new Error('Không tạo được vùng trình chiếu PDF.');
      wpOrdinaryState.pdfPageStages = [];
      wpOrdinaryState.pdfRenderedPages.clear();
      wpOrdinaryState.pdfPagePromises.clear();
      const firstPage = await pdfDocument.getPage(1);
      if (token !== wpOrdinaryState.renderToken) return;
      const firstViewport = firstPage.getViewport({ scale: 1 });

      for (let index = 0; index < wpOrdinaryState.pageCount; index += 1) {
        const stage = document.createElement('div');
        stage.className = 'ordinary-pdf-page-stage';
        stage.dataset.ordinaryPageIndex = String(index);
        stage.dataset.pdfLoaded = 'false';
        stage.style.width = `${Math.max(1, firstViewport.width)}px`;
        stage.style.height = `${Math.max(1, firstViewport.height)}px`;
        const canvas = document.createElement('canvas');
        canvas.className = 'ordinary-pdf-page-canvas';
        canvas.setAttribute('aria-label', `Trang PDF ${index + 1}`);
        canvas.dataset.baseWidth = String(firstViewport.width);
        canvas.dataset.baseHeight = String(firstViewport.height);
        stage.appendChild(canvas);
        host.appendChild(stage);
        wpOrdinaryState.pdfPageStages.push(stage);
        if (index < wpOrdinaryState.pageCount - 1) host.appendChild(wpCreateOrdinarySeparator());
      }

      const firstBatchCount = Math.min(2, wpOrdinaryState.pageCount);
      for (let index = 0; index < firstBatchCount; index += 1) {
        if (token !== wpOrdinaryState.renderToken) return;
        await wpRenderOrdinaryPdfPage(index, token);
      }
      if (token !== wpOrdinaryState.renderToken) return;
      wpOrdinaryState.pageIndex = 0;
      wpSyncOrdinaryPageUi();
      wpFitOrdinaryPage();
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      wpUpdateRegionButton();
      wpScheduleOrdinaryPdfIdlePages(token);
    }

    function wpApplyOrdinaryDocxPageFields(pages, totalPages, pageNumberStart = 1) {
      const pageList = Array.isArray(pages) ? pages : [];
      const total = Math.max(pageList.length, Number(totalPages) || 0);
      const start = Math.max(1, Number(pageNumberStart) || 1);
      const markerPattern = /[\uE101\uE102]/g;
      pageList.forEach((page, index) => {
        if (!(page instanceof HTMLElement)) return;
        const textNodes = [];
        const walker = document.createTreeWalker(page, NodeFilter.SHOW_TEXT);
        while (walker.nextNode()) {
          const textNode = walker.currentNode;
          if (textNode && /[\uE101\uE102]/.test(String(textNode.nodeValue || ''))) {
            textNodes.push(textNode);
          }
        }
        textNodes.forEach((textNode) => {
          textNode.nodeValue = String(textNode.nodeValue || '').replace(markerPattern, (marker) =>
            marker === '\uE102' ? String(total) : String(start + index)
          );
        });
      });
    }

    function wpPrepareOrdinaryDocxPages(pageFieldTotal = 0, pageNumberStart = 1) {
      const wrapper = wpOrdinaryState.docxWrapper;
      if (!(wrapper instanceof HTMLElement) || !wpOrdinaryState.docxPages.length) return;
      wrapper.querySelectorAll('.ordinary-document-page-separator').forEach((separator) => separator.remove());
      wpApplyOrdinaryDocxPageFields(
        wpOrdinaryState.docxPages,
        Math.max(Number(pageFieldTotal) || 0, wpOrdinaryState.docxPages.length),
        pageNumberStart
      );
      wpOrdinaryState.docxPages.forEach((page, index) => {
        if (!(page instanceof HTMLElement)) return;
        page.style.display = 'block';
        page.style.visibility = 'visible';
        page.style.position = 'relative';
        page.style.left = '0';
        page.style.top = '0';
        page.style.transform = 'none';
        page.style.zoom = '1';
        page.dataset.ordinaryPageIndex = String(index);
        page.dataset.ordinaryBaseWidth = String(Math.max(1, Number(page.offsetWidth)
          || Math.ceil(page.getBoundingClientRect().width) || 1));
        page.dataset.ordinaryBaseHeight = String(Math.max(1, Number(page.offsetHeight)
          || Math.ceil(page.getBoundingClientRect().height) || 1));
        if (index < wpOrdinaryState.docxPages.length - 1) {
          page.insertAdjacentElement('afterend', wpCreateOrdinarySeparator());
        }
      });
      wpOrdinaryState.pageIndex = 0;
      wpSyncOrdinaryPageUi();
      wpFitOrdinaryPage();
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      wpUpdateRegionButton();
    }

    function wpRenderOrdinaryPage(index) {
      if (wpState.documentMode !== 'ordinary' || !wpOrdinaryState.pageCount) return;
      if (wpOrdinaryState.kind === 'pdf') {
        const safeIndex = Math.max(0, Math.min(Number(index) || 0, wpOrdinaryState.pageCount - 1));
        wpScrollOrdinaryPage(safeIndex, true);
        if (!wpOrdinaryState.pdfRenderedPages.has(safeIndex)) {
          void wpRenderOrdinaryPdfPage(safeIndex).catch((error) => {
            wpNotify(error && error.message ? error.message : 'Không dựng được trang PDF.');
          });
        }
        return;
      }
      if (wpOrdinaryState.kind === 'xlsx') {
        wpShowSpreadsheetSheet(index);
        return;
      }
      if (wpOrdinaryState.kind === 'pptx-slide') {
        const direction = Number(index) < wpOrdinaryState.pageIndex ? -1 : 1;
        void wpRenderPowerPointSlide(index, direction);
        return;
      }
      wpScrollOrdinaryPage(index, true);
    }

    function wpShowOrdinaryLoading(fileName) {
      wpStopCountdown(true);
      if (typeof window.mvipCollapsePresentationInkDock === 'function') {
        window.mvipCollapsePresentationInkDock('wordPresentationSideInkDock');
      }
      wpSetScanSplit(false);
      wpResetRegionTool();
      wpClearLiveScan(false);
      wpState.mediaLayoutToken += 1;
      wpState.questions = [];
      wpState.index = 0;
      wpSetOrdinaryPresenterMode(true);
      presenter.hidden = false;
      presenter.setAttribute('aria-hidden', 'false');
      document.documentElement.classList.add('word-presentation-open');
      document.body.classList.add('word-presentation-open');
      wpSetViewMode('single');
      wpResetAnswerUi();
      wpApplyHttcBadge(null);
      wpCloseQuestionPicker(false);
      wpResetAdaptiveSizing();
      card.className = 'word-presentation-card ordinary-document-card is-loading';
      card.innerHTML = `<div class="ordinary-document-loading">${WP_PRESENTATION_LOADING_TEXT}</div>`;
      wpOrdinaryState.fileName = fileName;
      wpSyncOrdinaryPageUi();
      wpUpdateFullscreenButton();
      wpUpdateRegionButton();
      /* Mọi định dạng PowerPoint/Word/PDF/Excel đều dùng cùng vùng điều khiển
         và danh sách học sinh bên phải khi không ở toàn màn hình. */
      if (wpUsesRightControlPanel() && !wordPresentationIsFullscreen()) wpSetScanSplit(true);
      wpFitOrdinaryPage();
    }

    async function wpLoadOrdinaryPdf(file, arrayBuffer) {
      const pdfjs = await wpEnsurePdfRenderer();
      const loadingTask = pdfjs.getDocument({ data: new Uint8Array(arrayBuffer) });
      wpOrdinaryState.pdfLoadingTask = loadingTask;
      const pdfDocument = await loadingTask.promise;
      wpOrdinaryState.pdfDocument = pdfDocument;
      wpOrdinaryState.kind = 'pdf';
      wpOrdinaryState.pageCount = Math.max(0, Number(pdfDocument.numPages) || 0);
      if (!wpOrdinaryState.pageCount) throw new Error('File PDF không có trang để trình chiếu.');
      card.className = 'word-presentation-card ordinary-document-card';
      await wpRenderOrdinaryPdfDocument();
    }

    async function wpPrepareOrdinaryDocxFormulas(arrayBuffer) {
      const untouched = {
        arrayBuffer,
        formulas: [],
        equations: [],
        imageMap: {},
        tabParagraphs: [],
        paragraphLayouts: [],
        tableLayouts: [],
        officeObjects: [],
        defaultTabTwips: 720,
        pageCountHint: 0,
        pageNumberStart: 1,
        suppressFirstPageHeader: false,
      };
      if (!window.JSZip
          || typeof cv7991ExtractDocxImages !== 'function'
          || typeof cv7991ImagePlaceholdersForNode !== 'function'
          || typeof cv7991PreparePresenterImages !== 'function'
          || typeof cv7991PresenterHtmlFromText !== 'function'
          || typeof cv7991PresenterEquationHtml !== 'function') return untouched;
      try {
        const zip = await window.JSZip.loadAsync(arrayBuffer);
        const documentPath = 'word/document.xml';
        const documentEntry = zip.file(documentPath);
        if (!documentEntry) return untouched;

        const documentXml = await documentEntry.async('string');
        const parser = new DOMParser();
        const documentDoc = parser.parseFromString(documentXml, 'application/xml');
        if (documentDoc.getElementsByTagName('parsererror').length) return untouched;
        /* Bản xem nhanh chỉ chứa phần đầu tài liệu. Không giải nén/đo kích
           thước mọi ảnh ở hàng trăm trang phía sau: chỉ đọc các quan hệ thực
           sự còn xuất hiện trong document.xml hiện tại. Bản đầy đủ vẫn truyền
           đủ tập quan hệ khi được chuẩn bị ở lượt rảnh. */
        const referencedRelationshipIds = new Set();
        Array.from(documentDoc.getElementsByTagName('*')).forEach((node) => {
          Array.from(node && node.attributes || []).forEach((attribute) => {
            const attributeName = String(attribute && (attribute.localName || attribute.name) || '')
              .split(':').pop().toLowerCase();
            const qualifiedName = String(attribute && attribute.name || '').toLowerCase();
            const namespace = String(attribute && attribute.namespaceURI || '').toLowerCase();
            if (!/^(?:id|embed|link)$/.test(attributeName)) return;
            if (!qualifiedName.startsWith('r:') && !/relationships/.test(namespace)) return;
            const relationId = String(attribute && attribute.value || '').trim();
            if (relationId) referencedRelationshipIds.add(relationId);
          });
        });
        const hyperlinkTargets = await cv7991ExtractDocxHyperlinkTargets(zip);
        const hyperlinkFieldsChanged = mvipNormalizeWordHyperlinkFields(documentDoc, hyperlinkTargets);
        if (hyperlinkFieldsChanged) {
          const path = 'word/_rels/document.xml.rels';
          const entry = zip.file(path);
          const relDoc = parser.parseFromString(entry ? await entry.async('string')
            : '<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"/>', 'application/xml');
          const known = new Set(Array.from(relDoc.getElementsByTagNameNS('*', 'Relationship')).map(node => node.getAttribute('Id')));
          Object.entries(hyperlinkTargets).forEach(([id, target]) => {
            if (known.has(id)) return;
            const rel = relDoc.createElementNS(relDoc.documentElement.namespaceURI, 'Relationship');
            rel.setAttribute('Id', id); rel.setAttribute('Target', target); rel.setAttribute('TargetMode', 'External');
            rel.setAttribute('Type', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink');
            relDoc.documentElement.appendChild(rel);
          });
          zip.file(path, new XMLSerializer().serializeToString(relDoc));
        }
        const imageMap = await cv7991ExtractDocxImages(zip, referencedRelationshipIds);
        const embeddedVideos = window.mvipWordVideo
          ? window.mvipWordVideo.prepareDocument(documentDoc, imageMap) : [];
        const W_NS = 'http://schemas.openxmlformats.org/wordprocessingml/2006/main';
        const M_NS = 'http://schemas.openxmlformats.org/officeDocument/2006/math';
        const XML_NS = 'http://www.w3.org/XML/1998/namespace';
        const formulas = [];
        const equations = [];
        const tabParagraphs = [];
        const paragraphLayouts = [];
        const tableLayouts = [];
        const officeObjects = [];
        let formulaIndex = 0;
        let equationIndex = 0;
        let tabParagraphIndex = 0;
        let officeObjectIndex = 0;
        let vmlLinesChanged = false;
        let manualHeaderAlignmentChanged = false;
        let tableTypographyMaterializedChanged = false;
        let tableParagraphSpacingMaterializedChanged = false;
        let wingdingsSymbolsChanged = false;
        let emptyParagraphsMaterializedChanged = false;
        let floatingTablesMaterializedChanged = false;
        let defaultTabTwips = 720;
        let pageCountHint = 0;
        let pageNumberStart = 1;
        let pageFieldsChanged = false;
        const localNameOf = (node) => String(node && (node.localName || node.nodeName) || '')
          .split(':').pop().toLowerCase();
        const wordAttribute = (node, name) => String(node && (
          node.getAttributeNS && node.getAttributeNS(W_NS, name)
            || node.getAttribute && node.getAttribute(`w:${name}`)
            || node.getAttribute && node.getAttribute(name)
        ) || '').trim();
        const directChildByName = (node, name) => Array.from(node && node.childNodes || [])
          .find((child) => child && child.nodeType === Node.ELEMENT_NODE
            && localNameOf(child) === String(name || '').toLowerCase()) || null;

        /* w:sym lưu mã glyph của font ký hiệu, không phải Unicode. Trình
           duyệt thường không có Wingdings nên ký hiệu kéo ở đường cắt bị mất
           hoặc biến thành ô vuông. Chỉ đổi những mã đã biết chắc sang Unicode
           tương đương và vật chất hóa font ký hiệu phổ biến của hệ điều hành. */
        const wordSymbolMap = new Map([
          ['wingdings:f022', '\u2702'],
        ]);
        Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'sym')).forEach((symbolNode) => {
          const symbolFont = wordAttribute(symbolNode, 'font').toLowerCase();
          const symbolCode = wordAttribute(symbolNode, 'char').toLowerCase();
          const replacement = wordSymbolMap.get(`${symbolFont}:${symbolCode}`);
          if (!replacement || !symbolNode.parentNode) return;
          const textNode = documentDoc.createElementNS(W_NS, 'w:t');
          textNode.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          textNode.textContent = replacement;
          symbolNode.parentNode.replaceChild(textNode, symbolNode);
          const runNode = localNameOf(textNode.parentNode) === 'r' ? textNode.parentNode : null;
          if (runNode) {
            let runProperties = directChildByName(runNode, 'rPr');
            if (!runProperties) {
              runProperties = documentDoc.createElementNS(W_NS, 'w:rPr');
              runNode.insertBefore(runProperties, runNode.firstChild || null);
            }
            let fontsNode = directChildByName(runProperties, 'rFonts');
            if (!fontsNode) {
              fontsNode = documentDoc.createElementNS(W_NS, 'w:rFonts');
              runProperties.insertBefore(fontsNode, runProperties.firstChild || null);
            }
            ['ascii', 'hAnsi', 'eastAsia', 'cs'].forEach((name) => {
              fontsNode.setAttributeNS(W_NS, `w:${name}`, 'Segoe UI Symbol');
            });
            if (fontsNode.hasAttributeNS(W_NS, 'hint')) fontsNode.removeAttributeNS(W_NS, 'hint');
            fontsNode.removeAttribute('w:hint');
            fontsNode.removeAttribute('hint');
          }
          wingdingsSymbolsChanged = true;
        });

        /* Một đoạn Word rỗng vẫn chiếm đúng một dòng và thường được dùng để
           tạo khoảng cách quanh đường cắt, bảng hoặc hình neo. HTML <p> rỗng
           lại có thể cao 0 khi CSS trang đặt margin=0. Thêm NBSP vô hình vào
           chính đoạn thật để docx-preview tính line-height/spacing từ nguồn,
           thay vì chèn một khoảng trắng ước lượng sau khi đã dàn trang. */
        const sourceEmptyWordParagraphs = new WeakSet();
        const wordParagraphHasVisibleContent = (paragraphNode) =>
          Array.from(paragraphNode && paragraphNode.getElementsByTagName('*') || [])
            .some((node) => {
              let nearestParagraph = node.parentNode;
              let insideProperties = false;
              while (nearestParagraph && localNameOf(nearestParagraph) !== 'p') {
                if (/^(?:ppr|rpr)$/.test(localNameOf(nearestParagraph))) {
                  insideProperties = true;
                }
                nearestParagraph = nearestParagraph.parentNode;
              }
              if (nearestParagraph !== paragraphNode || insideProperties) return false;
              const name = localNameOf(node);
              if (name === 't' || name === 'instrtext' || name === 'deltext') {
                return String(node.textContent || '').length > 0;
              }
              return /^(?:tab|br|cr|sym|drawing|pict|object|omath|omathpara|fldsimple|footnotereference|endnotereference)$/.test(name);
            });
        Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'p')).forEach((paragraphNode) => {
          if (wordParagraphHasVisibleContent(paragraphNode)) return;
          sourceEmptyWordParagraphs.add(paragraphNode);
          const runNode = documentDoc.createElementNS(W_NS, 'w:r');
          const textNode = documentDoc.createElementNS(W_NS, 'w:t');
          textNode.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          textNode.textContent = '\u00a0';
          runNode.appendChild(textNode);
          paragraphNode.appendChild(runNode);
          emptyParagraphsMaterializedChanged = true;
        });
        /* Nếu section đầu bật Different First Page nhưng không có quan hệ
           header loại first, trang đầu của Word phải để trống phần đầu trang.
           docx-preview 0.3.6 lại rơi về header default; ghi lại tín hiệu để
           loại đúng header dự phòng sau khi render. */
        const sectionProperties = Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'sectPr'));
        const firstSectionProperties = sectionProperties[0] || null;
        const firstSectionHeaderRefs = Array.from(firstSectionProperties && firstSectionProperties.childNodes || [])
          .filter((node) => localNameOf(node) === 'headerreference');
        const suppressFirstPageHeader = !!firstSectionProperties
          && !!directChildByName(firstSectionProperties, 'titlePg')
          && firstSectionHeaderRefs.some((node) => wordAttribute(node, 'type').toLowerCase() === 'default')
          && !firstSectionHeaderRefs.some((node) => wordAttribute(node, 'type').toLowerCase() === 'first');
        /* Dùng một ký tự vùng riêng có bề rộng gần một chữ số để footer không
           bị dãn/ngắt dòng trong lúc docx-preview đang dựng trang. */
        const PAGE_FIELD_MARKER = '\uE101';
        const NUMPAGES_FIELD_MARKER = '\uE102';
        const pageFieldMarker = (instruction) => {
          const normalized = String(instruction || '').replace(/\s+/g, ' ').trim().toUpperCase();
          if (/\bNUMPAGES\b/.test(normalized)) return NUMPAGES_FIELD_MARKER;
          if (/\bPAGE\b/.test(normalized)) return PAGE_FIELD_MARKER;
          return '';
        };
        const setPageFieldResult = (partDoc, fieldNode, resultNodes, marker) => {
          const textNodes = (Array.isArray(resultNodes) ? resultNodes : [])
            .filter((node) => node && node.nodeType === Node.ELEMENT_NODE
              && localNameOf(node) === 't');
          if (textNodes.length) {
            textNodes[0].textContent = marker;
            textNodes.slice(1).forEach((node) => { node.textContent = ''; });
            return;
          }
          if (!fieldNode || !fieldNode.parentNode) return;
          const run = partDoc.createElementNS(W_NS, 'w:r');
          const textNode = partDoc.createElementNS(W_NS, 'w:t');
          textNode.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          textNode.textContent = marker;
          run.appendChild(textNode);
          fieldNode.parentNode.insertBefore(run, fieldNode);
        };
        const markPageFieldsInPart = (partDoc) => {
          if (!partDoc || partDoc.getElementsByTagName('parsererror').length) return false;
          let changed = false;
          Array.from(partDoc.getElementsByTagName('*')).forEach((fieldNode) => {
            if (localNameOf(fieldNode) !== 'fldsimple') return;
            const marker = pageFieldMarker(wordAttribute(fieldNode, 'instr'));
            if (!marker) return;
            const textNodes = Array.from(fieldNode.getElementsByTagNameNS(W_NS, 't'));
            setPageFieldResult(partDoc, fieldNode, textNodes, marker);
            changed = true;
          });

          const fieldStack = [];
          Array.from(partDoc.getElementsByTagName('*')).forEach((node) => {
            const local = localNameOf(node);
            if (local === 'fldchar') {
              const type = wordAttribute(node, 'fldCharType').toLowerCase();
              if (type === 'begin') {
                fieldStack.push({ beginNode: node, instruction: '', resultNodes: [], inResult: false });
              } else if (type === 'separate' && fieldStack.length) {
                fieldStack[fieldStack.length - 1].inResult = true;
              } else if (type === 'end' && fieldStack.length) {
                const field = fieldStack.pop();
                const marker = pageFieldMarker(field.instruction);
                if (marker) {
                  setPageFieldResult(partDoc, node, field.resultNodes, marker);
                  changed = true;
                }
              }
              return;
            }
            if (!fieldStack.length) return;
            const active = fieldStack[fieldStack.length - 1];
            if (local === 'instrtext' && !active.inResult) {
              active.instruction += ` ${String(node.textContent || '')}`;
            } else if (local === 't' && active.inResult) {
              active.resultNodes.push(node);
            }
          });
          return changed;
        };
        const markerRunForEquation = (mathNode, marker) => {
          const markerRun = documentDoc.createElementNS(W_NS, 'w:r');
          const allowedProperties = [
            'rfonts', 'b', 'bcs', 'i', 'ics', 'color', 'sz', 'szcs', 'lang', 'highlight', 'shd'
          ];
          const selectedProperties = new Map();
          Array.from(mathNode && mathNode.getElementsByTagNameNS(W_NS, 'rPr') || [])
            .forEach((runProperties) => {
              Array.from(runProperties.childNodes || []).forEach((propertyNode) => {
                if (!propertyNode || propertyNode.nodeType !== Node.ELEMENT_NODE) return;
                const propertyName = localNameOf(propertyNode);
                if (!allowedProperties.includes(propertyName)) return;
                const current = selectedProperties.get(propertyName);
                if (!current) {
                  selectedProperties.set(propertyName, propertyNode);
                  return;
                }
                /* m:ctrlPr thường chỉ có font/giá trị auto, còn m:r thật mới
                   mang màu Equation (ví dụ đáp án A màu đỏ). Cho giá trị cụ
                   thể của run nội dung thắng giá trị auto/rỗng của ctrlPr. */
                if (propertyName === 'color') {
                  const currentValue = wordAttribute(current, 'val').toLowerCase();
                  const candidateValue = wordAttribute(propertyNode, 'val').toLowerCase();
                  if ((!currentValue || currentValue === 'auto')
                      && candidateValue && candidateValue !== 'auto') {
                    selectedProperties.set(propertyName, propertyNode);
                  }
                }
              });
            });
          if (selectedProperties.size) {
            const cleanProperties = documentDoc.createElementNS(W_NS, 'w:rPr');
            allowedProperties.forEach((propertyName) => {
              const propertyNode = selectedProperties.get(propertyName);
              if (!propertyNode) return;
              cleanProperties.appendChild(propertyNode.cloneNode(true));
            });
            if (cleanProperties.childNodes.length) markerRun.appendChild(cleanProperties);
          }
          const markerText = documentDoc.createElementNS(W_NS, 'w:t');
          markerText.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          markerText.textContent = marker;
          markerRun.appendChild(markerText);
          return markerRun;
        };
        const mathParagraphAlignment = (mathParagraph) => {
          const paragraphProperties = directChildByName(mathParagraph, 'oMathParaPr');
          const justification = directChildByName(paragraphProperties, 'jc');
          const value = String(justification && (
            justification.getAttributeNS(M_NS, 'val')
              || justification.getAttribute('m:val')
              || justification.getAttribute('val')
          ) || '').trim().toLowerCase();
          if (/right/.test(value)) return 'right';
          if (/left/.test(value)) return 'left';
          if (/center/.test(value)) return 'center';
          return '';
        };

        /* docx-preview 0.3.6 đã dựng v:line thành SVG nhưng không chuyển
           strokecolor/strokeweight sang CSS. SVG vì thế vẫn tồn tại đúng tọa
           độ mà hoàn toàn trong suốt. Gắn nét vào chính v:line trước khi dựng
           để mọi đường kẻ nổi của Word (kể cả đường đặt dưới tiêu đề) hiện
           lại đúng màu, độ dày và chiều dài nguồn. */
        const patchVmlLineStylesInPart = (partDoc) => {
          if (!partDoc || partDoc.getElementsByTagName('parsererror').length) return false;
          let changed = false;
          Array.from(partDoc.getElementsByTagName('*')).forEach((lineNode) => {
            if (localNameOf(lineNode) !== 'line') return;
            const namespace = String(lineNode.namespaceURI || '').toLowerCase();
            if (namespace && !namespace.includes('vml')) return;
            const stroked = String(wordAttribute(lineNode, 'stroked') || '').trim().toLowerCase();
            if (/^(?:f|false|0|off|none)$/.test(stroked)) return;
            const strokeNode = directChildByName(lineNode, 'stroke');
            const rawColor = String(
              wordAttribute(lineNode, 'strokecolor')
                || wordAttribute(strokeNode, 'color')
                || '#000000'
            ).trim();
            const colorMatch = rawColor.match(/#[0-9a-f]{3,8}/i)
              || rawColor.match(/rgba?\([^)]*\)/i)
              || rawColor.match(/^[a-z]+/i);
            const strokeColor = colorMatch ? colorMatch[0] : '#000000';
            const rawWeight = String(
              wordAttribute(lineNode, 'strokeweight')
                || wordAttribute(strokeNode, 'weight')
                || '0.75pt'
            ).trim();
            const strokeWeight = /^\d*\.?\d+(?:pt|px|pc|in|cm|mm)?$/i.test(rawWeight)
              ? rawWeight : '0.75pt';
            const rawStyle = String(lineNode.getAttribute('style') || '').trim();
            const cleanStyle = rawStyle
              .replace(/(?:^|;)\s*stroke(?:-width)?\s*:[^;]*/gi, '')
              .replace(/(?:^|;)\s*fill\s*:[^;]*/gi, '')
              .replace(/^;+|;+$/g, '');
            lineNode.setAttribute('style', [
              cleanStyle,
              `stroke:${strokeColor}`,
              `stroke-width:${strokeWeight}`,
              'stroke-linecap:butt',
              'fill:none',
              'overflow:visible',
            ].filter(Boolean).join(';'));
            changed = true;
          });
          return changed;
        };

        /* docx-preview dựng border/padding của table style nhưng paragraph
           Normal bên trong ô có thể che mất rPr của chính table style. Đọc
           styles.xml và theme để khôi phục đúng cỡ/chủng chữ của bảng; định
           dạng trực tiếp trên từng run vẫn được giữ nguyên sau khi render. */
        const themeFontFamilies = new Map();
        const themePath = Object.keys(zip.files || {}).find((path) =>
          /^word\/theme\/theme\d+\.xml$/i.test(String(path || ''))
        );
        if (themePath && zip.file(themePath)) {
          try {
            const themeXml = await zip.file(themePath).async('string');
            const themeDoc = parser.parseFromString(themeXml, 'application/xml');
            const fontScheme = Array.from(themeDoc.getElementsByTagName('*'))
              .find((node) => localNameOf(node) === 'fontscheme');
            ['major', 'minor'].forEach((kind) => {
              const familyNode = directChildByName(fontScheme, `${kind}Font`);
              if (!familyNode) return;
              const latin = wordAttribute(directChildByName(familyNode, 'latin'), 'typeface');
              const eastAsia = wordAttribute(directChildByName(familyNode, 'ea'), 'typeface') || latin;
              const complex = wordAttribute(directChildByName(familyNode, 'cs'), 'typeface') || latin;
              if (latin) {
                themeFontFamilies.set(`${kind}ascii`, latin);
                themeFontFamilies.set(`${kind}hansi`, latin);
              }
              if (eastAsia) themeFontFamilies.set(`${kind}eastasia`, eastAsia);
              if (complex) themeFontFamilies.set(`${kind}bidi`, complex);
            });
          } catch (_) {}
        }
        const runTypographyFromProperties = (runProperties) => {
          const fontSizeNode = directChildByName(runProperties, 'sz')
            || directChildByName(runProperties, 'szCs');
          const rawHalfPoints = parseFloat(wordAttribute(fontSizeNode, 'val'));
          const fontsNode = directChildByName(runProperties, 'rFonts');
          const explicitFamily = wordAttribute(fontsNode, 'hAnsi')
            || wordAttribute(fontsNode, 'ascii')
            || wordAttribute(fontsNode, 'eastAsia')
            || wordAttribute(fontsNode, 'cs');
          const themeKey = String(
            wordAttribute(fontsNode, 'hAnsiTheme')
              || wordAttribute(fontsNode, 'asciiTheme')
              || wordAttribute(fontsNode, 'eastAsiaTheme')
              || wordAttribute(fontsNode, 'csTheme')
              || ''
          ).toLowerCase();
          return {
            fontHalfPoints:Number.isFinite(rawHalfPoints) && rawHalfPoints > 0 ? rawHalfPoints : 0,
            fontFamily:explicitFamily || themeFontFamilies.get(themeKey) || '',
          };
        };
        const paragraphSpacingFromProperties = (paragraphProperties) => {
          const spacingNode = directChildByName(paragraphProperties, 'spacing');
          if (!spacingNode) return null;
          const result = {};
          ['before', 'after', 'beforeLines', 'afterLines', 'line', 'lineRule',
            'beforeAutospacing', 'afterAutospacing']
            .forEach((name) => {
              const value = wordAttribute(spacingNode, name);
              if (value !== '') result[name] = value;
            });
          return Object.keys(result).length ? result : null;
        };
        const mergedParagraphSpacing = (...parts) => {
          const result = {};
          parts.forEach((part) => {
            if (part && typeof part === 'object') Object.assign(result, part);
          });
          return Object.keys(result).length ? result : null;
        };
        const wordCellMarginsFromProperties = (properties, marginContainerName) => {
          const marginContainer = directChildByName(properties, marginContainerName);
          if (!marginContainer) return null;
          const result = {};
          Array.from(marginContainer.childNodes || []).forEach((marginNode) => {
            let side = localNameOf(marginNode);
            if (side === 'start') side = 'left';
            if (side === 'end') side = 'right';
            if (!/^(?:top|right|bottom|left)$/.test(side)) return;
            const value = wordAttribute(marginNode, 'w');
            const type = wordAttribute(marginNode, 'type') || 'dxa';
            if (value === '' && !/^(?:nil|none)$/i.test(type)) return;
            result[side] = { value:value === '' ? '0' : value, type };
          });
          return Object.keys(result).length ? result : null;
        };
        const mergedWordCellMargins = (...parts) => {
          const result = {};
          parts.forEach((part) => {
            if (!part || typeof part !== 'object') return;
            ['top', 'right', 'bottom', 'left'].forEach((side) => {
              if (part[side]) result[side] = part[side];
            });
          });
          return Object.keys(result).length ? result : null;
        };
        const tableStyleTypographyById = new Map();
        const tableStyleParagraphSpacingById = new Map();
        const tableStyleCellMarginsById = new Map();
        const paragraphStyleTypographyById = new Map();
        const paragraphStyleSpacingById = new Map();
        const characterStyleTypographyById = new Map();
        let documentDefaultTypography = { fontSizePt:0, fontFamily:'' };
        let defaultParagraphTypography = { fontSizePt:0, fontFamily:'' };
        let documentDefaultParagraphSpacing = null;
        let defaultParagraphSpacing = null;
        let defaultParagraphStyleId = '';
        let defaultTableStyleId = '';
        let overrideTableStyleFontSizeAndJustification = false;
        const compatibilitySettingsEntry = zip.file('word/settings.xml');
        if (compatibilitySettingsEntry) {
          try {
            const settingsDoc = parser.parseFromString(
              await compatibilitySettingsEntry.async('string'),
              'application/xml'
            );
            const compatibilitySetting = Array.from(settingsDoc.getElementsByTagName('*'))
              .find((node) => localNameOf(node) === 'compatsetting'
                && wordAttribute(node, 'name').toLowerCase()
                  === 'overridetablestylefontsizeandjustification');
            overrideTableStyleFontSizeAndJustification = !!compatibilitySetting
              && !/^(?:0|false|off|no)$/i.test(wordAttribute(compatibilitySetting, 'val') || '1');
          } catch (_) {}
        }
        const stylesEntry = zip.file('word/styles.xml');
        if (stylesEntry) {
          try {
            const stylesXml = await stylesEntry.async('string');
            const stylesDoc = parser.parseFromString(stylesXml, 'application/xml');
            const documentDefaults = directChildByName(stylesDoc.documentElement, 'docDefaults');
            const defaultRunPropertiesContainer = directChildByName(documentDefaults, 'rPrDefault');
            const defaultRunProperties = directChildByName(defaultRunPropertiesContainer, 'rPr');
            const defaultParagraphPropertiesContainer = directChildByName(documentDefaults, 'pPrDefault');
            const defaultParagraphProperties = directChildByName(defaultParagraphPropertiesContainer, 'pPr');
            const defaultRunTypography = runTypographyFromProperties(defaultRunProperties);
            documentDefaultTypography = {
              fontSizePt:defaultRunTypography.fontHalfPoints > 0
                ? defaultRunTypography.fontHalfPoints / 2 : 0,
              fontFamily:defaultRunTypography.fontFamily || '',
            };
            documentDefaultParagraphSpacing = paragraphSpacingFromProperties(defaultParagraphProperties);
            const rawTableStyles = new Map();
            Array.from(stylesDoc.getElementsByTagNameNS(W_NS, 'style')).forEach((styleNode) => {
              if (wordAttribute(styleNode, 'type').toLowerCase() !== 'table') return;
              const styleId = wordAttribute(styleNode, 'styleId');
              if (!styleId) return;
              if (/^(?:1|true|on)$/i.test(wordAttribute(styleNode, 'default'))) {
                defaultTableStyleId = styleId.toLowerCase();
              }
              const basedOn = directChildByName(styleNode, 'basedOn');
              const runProperties = directChildByName(styleNode, 'rPr');
              const paragraphProperties = directChildByName(styleNode, 'pPr');
              const tableProperties = directChildByName(styleNode, 'tblPr');
              const fontSizeNode = directChildByName(runProperties, 'sz')
                || directChildByName(runProperties, 'szCs');
              const rawHalfPoints = parseFloat(wordAttribute(fontSizeNode, 'val'));
              const fontsNode = directChildByName(runProperties, 'rFonts');
              const explicitFamily = wordAttribute(fontsNode, 'hAnsi')
                || wordAttribute(fontsNode, 'ascii')
                || wordAttribute(fontsNode, 'eastAsia')
                || wordAttribute(fontsNode, 'cs');
              const themeKey = String(
                wordAttribute(fontsNode, 'hAnsiTheme')
                  || wordAttribute(fontsNode, 'asciiTheme')
                  || wordAttribute(fontsNode, 'eastAsiaTheme')
                  || wordAttribute(fontsNode, 'csTheme')
                  || ''
              ).toLowerCase();
              rawTableStyles.set(styleId.toLowerCase(), {
                basedOn:String(wordAttribute(basedOn, 'val') || '').toLowerCase(),
                fontSizePt:Number.isFinite(rawHalfPoints) && rawHalfPoints > 0
                  ? rawHalfPoints / 2 : 0,
                fontFamily:explicitFamily || themeFontFamilies.get(themeKey) || '',
                paragraphSpacing:paragraphSpacingFromProperties(paragraphProperties),
                cellMargins:wordCellMarginsFromProperties(tableProperties, 'tblCellMar'),
                hasConditionalParagraphSpacing:Array.from(styleNode.getElementsByTagNameNS(W_NS, 'tblStylePr'))
                  .some((conditionalNode) => !!paragraphSpacingFromProperties(
                    directChildByName(conditionalNode, 'pPr')
                  )),
              });
            });
            const resolvingStyles = new Set();
            const resolveTableStyle = (styleId) => {
              const key = String(styleId || '').toLowerCase();
              if (!key) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null, cellMargins:null,
                hasConditionalParagraphSpacing:false };
              if (tableStyleTypographyById.has(key)) return tableStyleTypographyById.get(key);
              if (resolvingStyles.has(key)) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null, cellMargins:null,
                hasConditionalParagraphSpacing:false };
              const rawStyle = rawTableStyles.get(key);
              if (!rawStyle) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null, cellMargins:null,
                hasConditionalParagraphSpacing:false };
              resolvingStyles.add(key);
              const parent = resolveTableStyle(rawStyle.basedOn);
              const resolved = {
                fontSizePt:rawStyle.fontSizePt || parent.fontSizePt || 0,
                fontFamily:rawStyle.fontFamily || parent.fontFamily || '',
                paragraphSpacing:mergedParagraphSpacing(parent.paragraphSpacing, rawStyle.paragraphSpacing),
                cellMargins:mergedWordCellMargins(parent.cellMargins, rawStyle.cellMargins),
                hasConditionalParagraphSpacing:!!(
                  parent.hasConditionalParagraphSpacing || rawStyle.hasConditionalParagraphSpacing
                ),
              };
              resolvingStyles.delete(key);
              tableStyleTypographyById.set(key, resolved);
              tableStyleParagraphSpacingById.set(key, {
                spacing:resolved.paragraphSpacing,
                conditional:resolved.hasConditionalParagraphSpacing,
              });
              tableStyleCellMarginsById.set(key, resolved.cellMargins || null);
              return resolved;
            };
            rawTableStyles.forEach((_, styleId) => { resolveTableStyle(styleId); });

            /* Giải đầy đủ basedOn cho style đoạn và style ký tự. Không dùng
               style Normal như một cỡ chữ chung: chỉ style được pStyle/rStyle
               tham chiếu rõ ràng mới tham gia, còn bảng vẫn lấy table style. */
            const rawTextStyles = {
              paragraph:new Map(),
              character:new Map(),
            };
            Array.from(stylesDoc.getElementsByTagNameNS(W_NS, 'style')).forEach((styleNode) => {
              const styleType = wordAttribute(styleNode, 'type').toLowerCase();
              if (styleType !== 'paragraph' && styleType !== 'character') return;
              const styleId = wordAttribute(styleNode, 'styleId');
              if (!styleId) return;
              if (styleType === 'paragraph'
                  && /^(?:1|true|on)$/i.test(wordAttribute(styleNode, 'default'))) {
                defaultParagraphStyleId = styleId.toLowerCase();
              }
              const basedOn = directChildByName(styleNode, 'basedOn');
              const runProperties = directChildByName(styleNode, 'rPr');
              const paragraphProperties = directChildByName(styleNode, 'pPr');
              const fontSizeNode = directChildByName(runProperties, 'sz')
                || directChildByName(runProperties, 'szCs');
              const rawHalfPoints = parseFloat(wordAttribute(fontSizeNode, 'val'));
              const fontsNode = directChildByName(runProperties, 'rFonts');
              const explicitFamily = wordAttribute(fontsNode, 'hAnsi')
                || wordAttribute(fontsNode, 'ascii')
                || wordAttribute(fontsNode, 'eastAsia')
                || wordAttribute(fontsNode, 'cs');
              const themeKey = String(
                wordAttribute(fontsNode, 'hAnsiTheme')
                  || wordAttribute(fontsNode, 'asciiTheme')
                  || wordAttribute(fontsNode, 'eastAsiaTheme')
                  || wordAttribute(fontsNode, 'csTheme')
                  || ''
              ).toLowerCase();
              rawTextStyles[styleType].set(styleId.toLowerCase(), {
                basedOn:String(wordAttribute(basedOn, 'val') || '').toLowerCase(),
                fontSizePt:Number.isFinite(rawHalfPoints) && rawHalfPoints > 0
                  ? rawHalfPoints / 2 : 0,
                fontFamily:explicitFamily || themeFontFamilies.get(themeKey) || '',
                paragraphSpacing:styleType === 'paragraph'
                  ? paragraphSpacingFromProperties(paragraphProperties) : null,
              });
            });
            const resolveTextStyles = (rawStyles, resolvedStyles) => {
              const resolving = new Set();
              const resolve = (styleId) => {
                const key = String(styleId || '').toLowerCase();
                if (!key) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null };
                if (resolvedStyles.has(key)) return resolvedStyles.get(key);
                if (resolving.has(key)) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null };
                const rawStyle = rawStyles.get(key);
                if (!rawStyle) return { fontSizePt:0, fontFamily:'', paragraphSpacing:null };
                resolving.add(key);
                const parent = resolve(rawStyle.basedOn);
                const resolved = {
                  fontSizePt:rawStyle.fontSizePt || parent.fontSizePt || 0,
                  fontFamily:rawStyle.fontFamily || parent.fontFamily || '',
                  paragraphSpacing:mergedParagraphSpacing(parent.paragraphSpacing, rawStyle.paragraphSpacing),
                };
                resolving.delete(key);
                resolvedStyles.set(key, resolved);
                return resolved;
              };
              rawStyles.forEach((_, styleId) => { resolve(styleId); });
            };
            resolveTextStyles(rawTextStyles.paragraph, paragraphStyleTypographyById);
            resolveTextStyles(rawTextStyles.character, characterStyleTypographyById);
            paragraphStyleTypographyById.forEach((style, styleId) => {
              paragraphStyleSpacingById.set(styleId, style.paragraphSpacing || null);
            });
            defaultParagraphTypography = paragraphStyleTypographyById.get(defaultParagraphStyleId)
              || documentDefaultTypography;
            defaultParagraphSpacing = paragraphStyleSpacingById.get(defaultParagraphStyleId)
              || documentDefaultParagraphSpacing;
          } catch (_) {}
        }

        /* Word lưu đồng thời tổng bề rộng bảng (tblW) và lưới cột (tblGrid).
           Với bảng dùng pct, tổng grid thường khác tblW vài phần trăm. Trình
           duyệt ưu tiên các độ rộng grid tuyệt đối và làm bảng tràn/co sai.
           Đặt bookmark không chiếm chỗ để sau khi render nhận đúng từng bảng,
           rồi chuẩn hóa các cột theo tblW mà vẫn giữ nguyên tỷ lệ tblGrid. */
        let nextTableBookmarkId = Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'bookmarkStart'))
          .reduce((maximum, node) => {
            const value = parseInt(wordAttribute(node, 'id'), 10);
            return Number.isFinite(value) ? Math.max(maximum, value) : maximum;
          }, 60000) + 1;
        const pageSizeNode = directChildByName(firstSectionProperties, 'pgSz');
        const pageMarginsNode = directChildByName(firstSectionProperties, 'pgMar');
        const sourcePageWidthTwips = parseFloat(wordAttribute(pageSizeNode, 'w'));
        const sourcePageLeftTwips = parseFloat(wordAttribute(pageMarginsNode, 'left'));
        const sourcePageRightTwips = parseFloat(wordAttribute(pageMarginsNode, 'right'));
        const sourceTextWidthTwips = Number.isFinite(sourcePageWidthTwips)
          ? Math.max(0, sourcePageWidthTwips
            - (Number.isFinite(sourcePageLeftTwips) ? sourcePageLeftTwips : 0)
            - (Number.isFinite(sourcePageRightTwips) ? sourcePageRightTwips : 0))
          : 0;
        Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'tbl')).forEach((tableNode, index) => {
          const firstParagraph = Array.from(tableNode.getElementsByTagNameNS(W_NS, 'p')).find((paragraph) => {
            let ancestor = paragraph.parentNode;
            while (ancestor && ancestor !== tableNode && localNameOf(ancestor) !== 'tbl') {
              ancestor = ancestor.parentNode;
            }
            return ancestor === tableNode;
          });
          if (!firstParagraph) return;
          const tableProperties = directChildByName(tableNode, 'tblPr');
          const tableStyleNode = directChildByName(tableProperties, 'tblStyle');
          const tableStyleId = String(wordAttribute(tableStyleNode, 'val') || '').toLowerCase();
          const effectiveTableStyleId = tableStyleId || defaultTableStyleId;
          const tableTypography = tableStyleTypographyById.get(effectiveTableStyleId)
            || { fontSizePt:0, fontFamily:'' };
          const tableParagraphSpacingInfo = tableStyleParagraphSpacingById.get(effectiveTableStyleId)
            || { spacing:null, conditional:false };
          const effectiveTableCellMargins = mergedWordCellMargins(
            tableStyleCellMarginsById.get(effectiveTableStyleId),
            wordCellMarginsFromProperties(tableProperties, 'tblCellMar')
          );
          const defaultParagraphFontSizePt = Number(defaultParagraphTypography.fontSizePt) || 0;
          const legacyTableFontSizeWins = !overrideTableStyleFontSizeAndJustification
            && (Math.abs(defaultParagraphFontSizePt - 11) < .01
              || Math.abs(defaultParagraphFontSizePt - 12) < .01);
          const effectiveTableTypography = {
            /* Theo style hierarchy chuẩn, Normal thắng table style. Chỉ chế
               độ tương thích cũ (compat flag tắt + Normal 11/12pt) mới cho
               cỡ trong table style thắng. Đây là lý do bảng đầu trang từng
               bị hạ từ 12pt xuống 10pt. */
            fontSizePt:legacyTableFontSizeWins
              ? (Number(tableTypography.fontSizePt)
                || defaultParagraphFontSizePt
                || Number(documentDefaultTypography.fontSizePt)
                || 0)
              : (defaultParagraphFontSizePt
                || Number(tableTypography.fontSizePt)
                || Number(documentDefaultTypography.fontSizePt)
                || 0),
            fontFamily:String(defaultParagraphTypography.fontFamily
              || tableTypography.fontFamily
              || documentDefaultTypography.fontFamily
              || ''),
          };
          const widthNode = directChildByName(tableProperties, 'tblW');
          const floatingPositionNode = directChildByName(tableProperties, 'tblpPr');
          const sourceTableWidthTwips = parseFloat(wordAttribute(widthNode, 'w'));
          const floatingHorizontalSpec = String(
            wordAttribute(floatingPositionNode, 'tblpXSpec') || ''
          ).toLowerCase();
          const floatingVerticalAnchor = String(
            wordAttribute(floatingPositionNode, 'vertAnchor') || ''
          ).toLowerCase();
          const floatingTopTwips = parseFloat(wordAttribute(floatingPositionNode, 'tblpY'));
          /* docx-preview dựng tblpPr bằng float CSS nhưng không thực hiện luật
             tránh vật thể rộng của Word. Ba đoạn theo sau vì thế chui xuống
             dưới bảng nổi. Với bảng căn giữa chiếm gần hết vùng chữ, Word
             luôn đẩy nội dung kế tiếp xuống dưới; chuyển riêng trường hợp
             tương đương này về bảng trong luồng để trình duyệt có cùng hình
             học, đồng thời giữ lại tblpY làm khoảng trên của bảng. */
          const floatingFlow = !!(floatingPositionNode
            && floatingHorizontalSpec === 'center'
            && /^(?:text|margin|page)$/.test(floatingVerticalAnchor)
            && sourceTextWidthTwips > 0
            && Number.isFinite(sourceTableWidthTwips)
            && sourceTableWidthTwips >= sourceTextWidthTwips * .82)
            ? {
              centered:true,
              topTwips:Number.isFinite(floatingTopTwips)
                ? Math.max(0, Math.min(1440, floatingTopTwips)) : 0,
            }
            : null;
          if (floatingFlow) {
            tableProperties.removeChild(floatingPositionNode);
            let tableAlignmentNode = directChildByName(tableProperties, 'jc');
            if (!tableAlignmentNode) {
              tableAlignmentNode = documentDoc.createElementNS(W_NS, 'w:jc');
              if (widthNode && widthNode.parentNode === tableProperties) {
                tableProperties.insertBefore(tableAlignmentNode, widthNode.nextSibling || null);
              } else {
                tableProperties.appendChild(tableAlignmentNode);
              }
            }
            tableAlignmentNode.setAttributeNS(W_NS, 'w:val', 'center');
            floatingTablesMaterializedChanged = true;
          }
          const layoutNode = directChildByName(tableProperties, 'tblLayout');
          const gridNode = directChildByName(tableNode, 'tblGrid');
          const columnsTwips = Array.from(gridNode && gridNode.childNodes || [])
            .filter((node) => localNameOf(node) === 'gridcol')
            .map((node) => parseFloat(wordAttribute(node, 'w')))
            .filter((value) => Number.isFinite(value) && value > 0);
          const sourceRows = Array.from(tableNode.childNodes || [])
            .filter((node) => localNameOf(node) === 'tr');
          const cellMargins = sourceRows.map((rowNode) => Array.from(rowNode.childNodes || [])
            .filter((node) => localNameOf(node) === 'tc')
            .map((cellNode) => mergedWordCellMargins(
              effectiveTableCellMargins,
              wordCellMarginsFromProperties(directChildByName(cellNode, 'tcPr'), 'tcMar')
            ))
          );

          /* Tính và vật chất hóa cỡ/font hiệu lực riêng cho từng run theo
             chuỗi Word: docDefaults -> table style -> paragraph style ->
             pPr/rPr -> character style -> rPr. Đồng thời vật chất hóa giãn
             dòng hiệu lực; khi tệp không khai báo, Word dùng single (240). */
          const tableFontHalfPoints = Math.round((Number(effectiveTableTypography.fontSizePt) || 0) * 2);
          const tableFontFamily = String(effectiveTableTypography.fontFamily || '').trim();
          Array.from(tableNode.getElementsByTagNameNS(W_NS, 'p')).forEach((paragraph) => {
              let nearestTable = paragraph.parentNode;
              while (nearestTable && localNameOf(nearestTable) !== 'tbl') nearestTable = nearestTable.parentNode;
              if (nearestTable !== tableNode) return;
              let paragraphProperties = directChildByName(paragraph, 'pPr');
              const paragraphRunProperties = directChildByName(paragraphProperties, 'rPr');
              const paragraphDirectTypography = runTypographyFromProperties(paragraphRunProperties);
              const paragraphStyleNode = directChildByName(paragraphProperties, 'pStyle');
              const paragraphStyleId = String(wordAttribute(paragraphStyleNode, 'val') || '').toLowerCase();
              const hasExplicitParagraphStyle = !!paragraphStyleId;
              const paragraphStyleTypography = paragraphStyleTypographyById.get(paragraphStyleId)
                || (!hasExplicitParagraphStyle ? defaultParagraphTypography : null)
                || { fontSizePt:0, fontFamily:'' };
              const paragraphStyleFontHalfPoints = Math.round(
                (Number(paragraphStyleTypography.fontSizePt) || 0) * 2
              );
              const paragraphBaseFontHalfPoints = hasExplicitParagraphStyle
                ? (paragraphStyleFontHalfPoints || tableFontHalfPoints)
                : (legacyTableFontSizeWins
                  ? (Math.round((Number(tableTypography.fontSizePt) || 0) * 2)
                    || paragraphStyleFontHalfPoints || tableFontHalfPoints)
                  : (paragraphStyleFontHalfPoints || tableFontHalfPoints));
              const paragraphFontHalfPoints = paragraphDirectTypography.fontHalfPoints
                || paragraphBaseFontHalfPoints;
              const paragraphFontFamily = paragraphDirectTypography.fontFamily
                || String(paragraphStyleTypography.fontFamily || '').trim()
                || tableFontFamily;

              const paragraphDirectSpacing = paragraphSpacingFromProperties(paragraphProperties);
              const paragraphStyleSpacing = paragraphStyleSpacingById.get(
                hasExplicitParagraphStyle ? paragraphStyleId : defaultParagraphStyleId
              ) || defaultParagraphSpacing;
              const effectiveParagraphSpacing = mergedParagraphSpacing(
                { before:'0', after:'0', line:'240', lineRule:'auto' },
                documentDefaultParagraphSpacing,
                tableParagraphSpacingInfo.spacing,
                paragraphStyleSpacing,
                paragraphDirectSpacing
              );
              if (effectiveParagraphSpacing && !tableParagraphSpacingInfo.conditional) {
                if (!paragraphProperties) {
                  paragraphProperties = documentDoc.createElementNS(W_NS, 'w:pPr');
                  paragraph.insertBefore(paragraphProperties, paragraph.firstChild || null);
                }
                let spacingNode = directChildByName(paragraphProperties, 'spacing');
                if (!spacingNode) {
                  spacingNode = documentDoc.createElementNS(W_NS, 'w:spacing');
                  paragraphProperties.appendChild(spacingNode);
                }
                Object.entries(effectiveParagraphSpacing).forEach(([name, value]) => {
                  if (wordAttribute(spacingNode, name) === '') {
                    spacingNode.setAttributeNS(W_NS, `w:${name}`, String(value));
                    tableParagraphSpacingMaterializedChanged = true;
                  }
                });
              }

              Array.from(paragraph.getElementsByTagNameNS(W_NS, 'r')).forEach((run) => {
                let nearestParagraph = run.parentNode;
                while (nearestParagraph && localNameOf(nearestParagraph) !== 'p') {
                  nearestParagraph = nearestParagraph.parentNode;
                }
                if (nearestParagraph !== paragraph) return;
                let runProperties = directChildByName(run, 'rPr');
                const runDirectTypography = runTypographyFromProperties(runProperties);
                const characterStyleNode = directChildByName(runProperties, 'rStyle');
                const characterStyleId = String(wordAttribute(characterStyleNode, 'val') || '').toLowerCase();
                const characterStyleTypography = characterStyleTypographyById.get(characterStyleId)
                  || { fontSizePt:0, fontFamily:'' };
                const effectiveFontHalfPoints = runDirectTypography.fontHalfPoints
                  || Math.round((Number(characterStyleTypography.fontSizePt) || 0) * 2)
                  || paragraphFontHalfPoints;
                const effectiveFontFamily = runDirectTypography.fontFamily
                  || String(characterStyleTypography.fontFamily || '').trim()
                  || paragraphFontFamily;
                const needsFontSize = !runDirectTypography.fontHalfPoints
                  && effectiveFontHalfPoints > 0;
                const needsFontFamily = !runDirectTypography.fontFamily
                  && !!effectiveFontFamily;
                if (!needsFontSize && !needsFontFamily) return;
                if (!runProperties) {
                  runProperties = documentDoc.createElementNS(W_NS, 'w:rPr');
                  run.insertBefore(runProperties, run.firstChild || null);
                }
                if (needsFontFamily) {
                  const fonts = documentDoc.createElementNS(W_NS, 'w:rFonts');
                  fonts.setAttributeNS(W_NS, 'w:ascii', effectiveFontFamily);
                  fonts.setAttributeNS(W_NS, 'w:hAnsi', effectiveFontFamily);
                  fonts.setAttributeNS(W_NS, 'w:eastAsia', effectiveFontFamily);
                  fonts.setAttributeNS(W_NS, 'w:cs', effectiveFontFamily);
                  runProperties.appendChild(fonts);
                }
                if (needsFontSize) {
                  const fontSize = documentDoc.createElementNS(W_NS, 'w:sz');
                  fontSize.setAttributeNS(W_NS, 'w:val', String(effectiveFontHalfPoints));
                  const complexFontSize = documentDoc.createElementNS(W_NS, 'w:szCs');
                  complexFontSize.setAttributeNS(W_NS, 'w:val', String(effectiveFontHalfPoints));
                  runProperties.appendChild(fontSize);
                  runProperties.appendChild(complexFontSize);
                }
                tableTypographyMaterializedChanged = true;
              });
            });

          /* Các mẫu văn bản hành chính thường căn quốc hiệu bằng một chuỗi
             dấu cách trong đoạn justify. Word đo chuỗi này theo bộ dàn trang
             riêng, còn HTML đo theo glyph của trình duyệt nên hai dòng lệch
             nhau. Với bảng đầu trang không viền, ít hàng/cột và có dấu cách
             thủ công như vậy, chuyển cả cột sang căn giữa thật. Các đường
             gạch chân VML vẫn giữ tọa độ nguồn và vốn cũng nằm giữa ô. */
          const borderContainer = directChildByName(tableProperties, 'tblBorders');
          const borderNodes = ['top', 'right', 'bottom', 'left', 'insideH', 'insideV']
            .map((name) => directChildByName(borderContainer, name))
            .filter(Boolean);
          const borderless = borderNodes.length > 0 && borderNodes.every((borderNode) =>
            /^(?:none|nil|0|false|off)$/i.test(String(wordAttribute(borderNode, 'val') || ''))
          );
          if (borderless && columnsTwips.length >= 2 && columnsTwips.length <= 3
              && sourceRows.length >= 2 && sourceRows.length <= 4) {
            const cellsByRow = sourceRows.map((rowNode) => Array.from(rowNode.childNodes || [])
              .filter((node) => localNameOf(node) === 'tc'));
            const columnCount = Math.max(0, ...cellsByRow.map((cells) => cells.length));
            for (let columnIndex = 0; columnIndex < columnCount; columnIndex += 1) {
              const paragraphs = cellsByRow.map((cells) => cells[columnIndex]).filter(Boolean)
                .flatMap((cellNode) => Array.from(cellNode.childNodes || [])
                  .filter((node) => localNameOf(node) === 'p'));
              const hasManualCenteredLine = paragraphs.some((paragraph) => {
                const paragraphProperties = directChildByName(paragraph, 'pPr');
                const alignment = directChildByName(paragraphProperties, 'jc');
                const value = String(wordAttribute(alignment, 'val') || '').toLowerCase();
                const text = Array.from(paragraph.getElementsByTagNameNS(W_NS, 't'))
                  .map((node) => String(node.textContent || '')).join('');
                return value === 'both' && /^[\t \u00a0]{4,}\S/.test(text);
              });
              if (!hasManualCenteredLine) continue;
              paragraphs.forEach((paragraph) => {
                const paragraphProperties = directChildByName(paragraph, 'pPr');
                const alignment = directChildByName(paragraphProperties, 'jc');
                if (!alignment || String(wordAttribute(alignment, 'val') || '').toLowerCase() !== 'both') return;
                alignment.setAttributeNS(W_NS, 'w:val', 'center');
                const textNodes = Array.from(paragraph.getElementsByTagNameNS(W_NS, 't'));
                const firstTextWithSpaces = textNodes.find((node) => /^[\t \u00a0]+/.test(
                  String(node.textContent || '')
                ));
                if (firstTextWithSpaces) {
                  firstTextWithSpaces.textContent = String(firstTextWithSpaces.textContent || '')
                    .replace(/^[\t \u00a0]+/, '');
                }
                manualHeaderAlignmentChanged = true;
              });
            }
          }

          const rowHeights = sourceRows
            .map((rowNode) => {
              const rowProperties = directChildByName(rowNode, 'trPr');
              const heightNode = directChildByName(rowProperties, 'trHeight');
              const value = parseFloat(wordAttribute(heightNode, 'val'));
              const rule = String(wordAttribute(heightNode, 'hRule') || 'atLeast').toLowerCase();
              return {
                twips:Number.isFinite(value) && value > 0 ? value : 0,
                exact:rule === 'exact',
              };
            });
          const widthValue = parseFloat(wordAttribute(widthNode, 'w'));
          const widthType = String(wordAttribute(widthNode, 'type') || 'auto').trim().toLowerCase();
          const marker = `CV7991ORDTABLE${index + 1}`;
          const bookmarkId = String(nextTableBookmarkId++);
          const bookmarkStart = documentDoc.createElementNS(W_NS, 'w:bookmarkStart');
          bookmarkStart.setAttributeNS(W_NS, 'w:id', bookmarkId);
          bookmarkStart.setAttributeNS(W_NS, 'w:name', marker);
          const bookmarkEnd = documentDoc.createElementNS(W_NS, 'w:bookmarkEnd');
          bookmarkEnd.setAttributeNS(W_NS, 'w:id', bookmarkId);
          const paragraphProperties = directChildByName(firstParagraph, 'pPr');
          const insertionPoint = paragraphProperties ? paragraphProperties.nextSibling : firstParagraph.firstChild;
          firstParagraph.insertBefore(bookmarkStart, insertionPoint);
          firstParagraph.insertBefore(bookmarkEnd, insertionPoint);
          tableLayouts.push({
            marker,
            widthType,
            widthValue: Number.isFinite(widthValue) ? widthValue : 0,
            columnsTwips,
            rowHeights,
            tableCellMargins:effectiveTableCellMargins,
            cellMargins,
            typography:{
              fontSizePt:Number(effectiveTableTypography.fontSizePt) || 0,
              fontFamily:String(effectiveTableTypography.fontFamily || ''),
            },
            floatingFlow,
            layout: String(wordAttribute(layoutNode, 'type')
              || wordAttribute(layoutNode, 'val') || '').trim().toLowerCase(),
          });
        });

        /* Giữ đúng giãn dòng/giãn đoạn của các đoạn văn ngoài Drawing/TextBox.
           Đoạn trong bảng có w:spacing trực tiếp cũng phải đi qua nhánh này;
           nếu không, các dòng trống dùng để giữ Shape trong ô sẽ thấp hơn
           Word và hàng bảng co lên sát hình. Với
           lineRule=auto, w:line là số phần 240 của một dòng (312 = 1.3),
           tuyệt đối không phải twip. Gắn bookmark không chiếm chỗ để sau khi
           docx-preview dựng xong có thể áp line-height theo chính cỡ chữ thực
           của từng dòng; Shapes nổi tiếp tục dùng nguyên positionV của Word. */
        const bodyNode = documentDoc.getElementsByTagNameNS(W_NS, 'body')[0] || null;
        const bodyParagraphs = bodyNode
          ? Array.from(bodyNode.getElementsByTagNameNS(W_NS, 'p')) : [];
        bodyParagraphs.forEach((paragraphNode, paragraphIndex) => {
          let ancestor = paragraphNode.parentNode;
          let insideTable = false;
          let insideTextBoxOrDrawing = false;
          while (ancestor && ancestor !== bodyNode) {
            const ancestorName = localNameOf(ancestor);
            if (ancestorName === 'tbl') insideTable = true;
            if (/^(?:txbxcontent|drawing|pict)$/.test(ancestorName)) {
              insideTextBoxOrDrawing = true;
            }
            ancestor = ancestor.parentNode;
          }
          if (insideTextBoxOrDrawing) return;
          /* Một w:p không có chữ vẫn chiếm trọn một dòng trong Word. Trường
             hợp này rất quan trọng khi tác giả chèn vài đoạn trống để dành
             chỗ cho Shape nổi. HTML lại làm p rỗng cao 0 nên nội dung kế
             tiếp có thể chui lên dưới hình. Chỉ xem chữ/công thức thực sự là
             nội dung trong luồng; drawing neo tuyệt đối không làm mất cờ rỗng. */
          const hasVisibleFlowContent = Array.from(
            paragraphNode.getElementsByTagName('*')
          ).some((node) => {
            let nearestParagraph = node.parentNode;
            let insideProperties = false;
            while (nearestParagraph && localNameOf(nearestParagraph) !== 'p') {
              if (/^(?:ppr|rpr)$/.test(localNameOf(nearestParagraph))) {
                insideProperties = true;
              }
              nearestParagraph = nearestParagraph.parentNode;
            }
            if (nearestParagraph !== paragraphNode || insideProperties) return false;
            const nodeName = localNameOf(node);
            if (/^(?:t|instrtext|deltext)$/.test(nodeName)) {
              return !!String(node.textContent || '').trim();
            }
            if (/^(?:tab|br|cr|sym|omath|omathpara)$/.test(nodeName)) return true;
            return false;
          });
          const emptyLine = !hasVisibleFlowContent;
          const paragraphProperties = directChildByName(paragraphNode, 'pPr');
          const directParagraphSpacing = paragraphSpacingFromProperties(paragraphProperties);
          /* Table style có thể dùng giãn đoạn theo điều kiện firstRow/lastRow.
             Chỉ mở rộng xử lý trong bảng khi spacing đã có trực tiếp (nguồn
             khai báo hoặc bước vật chất hóa style ở trên), tránh đoán style. */
          if (insideTable && !directParagraphSpacing) return;
          const paragraphStyleNode = directChildByName(paragraphProperties, 'pStyle');
          const paragraphStyleId = String(
            wordAttribute(paragraphStyleNode, 'val') || defaultParagraphStyleId || ''
          ).toLowerCase();
          // Floating drawings do not create a text line. Preserve the font of
          // the paragraph mark: after deleting our token an empty HTML p must
          // not fall back to the presentation card's 16px UI font.
          const paragraphMark = directChildByName(paragraphProperties, 'rPr');
          const markTypography = runTypographyFromProperties(paragraphMark);
          const markStyleId = String(wordAttribute(
            directChildByName(paragraphMark, 'rStyle'), 'val'
          ) || '').toLowerCase();
          const markStyleTypography = characterStyleTypographyById.get(markStyleId) || {};
          const paragraphTypography = paragraphStyleTypographyById.get(paragraphStyleId)
            || defaultParagraphTypography || documentDefaultTypography;
          const emptyLineTypography = emptyLine ? {
            fontSizePt: markTypography.fontHalfPoints / 2
              || Number(markStyleTypography.fontSizePt)
              || Number(paragraphTypography.fontSizePt)
              || Number(documentDefaultTypography.fontSizePt) || 0,
            fontFamily: markTypography.fontFamily || markStyleTypography.fontFamily
              || paragraphTypography.fontFamily || documentDefaultTypography.fontFamily || '',
          } : null;
          const effectiveSpacing = mergedParagraphSpacing(
            { line:'240', lineRule:'auto' },
            documentDefaultParagraphSpacing,
            paragraphStyleSpacingById.get(paragraphStyleId) || null,
            directParagraphSpacing
          );
          const lineValue = parseFloat(String(effectiveSpacing.line || ''));
          const lineRule = String(effectiveSpacing.lineRule || 'auto').toLowerCase();
          const before = parseFloat(String(effectiveSpacing.before || ''));
          const after = parseFloat(String(effectiveSpacing.after || ''));
          const beforeLines = parseFloat(String(effectiveSpacing.beforeLines || ''));
          const afterLines = parseFloat(String(effectiveSpacing.afterLines || ''));
          const needsLineCorrection = Number.isFinite(lineValue) && lineValue > 0
            && (lineRule !== 'auto' || Math.abs(lineValue - 240) > .01);
          const needsParagraphCorrection = [before, after, beforeLines, afterLines]
            .some((value) => Number.isFinite(value) && value >= 0);
          if (!needsLineCorrection && !needsParagraphCorrection && !emptyLine) return;
          const insertionPoint = paragraphProperties
            ? paragraphProperties.nextSibling : paragraphNode.firstChild;
          const markerBase = `CV7991ORDPARA${paragraphIndex + 1}`;
          const marker = emptyLine ? `${markerBase}TOKEN` : markerBase;
          if (emptyLine) {
            /* docx-preview có thể bỏ bookmark nằm trong đoạn chỉ chứa NBSP.
               Token chữ chắc chắn sống tới DOM, sau đó được xóa ngay khi đã
               lấy đúng p nguồn. Nó không được dùng để ước lượng khoảng cách. */
            const markerRun = documentDoc.createElementNS(W_NS, 'w:r');
            const markerText = documentDoc.createElementNS(W_NS, 'w:t');
            markerText.setAttributeNS(XML_NS, 'xml:space', 'preserve');
            markerText.textContent = marker;
            markerRun.appendChild(markerText);
            paragraphNode.insertBefore(markerRun, insertionPoint);
          } else {
            const bookmarkId = String(nextTableBookmarkId++);
            const bookmarkStart = documentDoc.createElementNS(W_NS, 'w:bookmarkStart');
            bookmarkStart.setAttributeNS(W_NS, 'w:id', bookmarkId);
            bookmarkStart.setAttributeNS(W_NS, 'w:name', marker);
            const bookmarkEnd = documentDoc.createElementNS(W_NS, 'w:bookmarkEnd');
            bookmarkEnd.setAttributeNS(W_NS, 'w:id', bookmarkId);
            paragraphNode.insertBefore(bookmarkStart, insertionPoint);
            paragraphNode.insertBefore(bookmarkEnd, insertionPoint);
          }
          paragraphLayouts.push({
            marker,
            emptyLine,
            emptyLineTypography,
            tokenMarker:emptyLine,
            line:Number.isFinite(lineValue) && lineValue > 0 ? lineValue : 0,
            lineRule,
            before:Number.isFinite(before) && before >= 0 ? before : null,
            after:Number.isFinite(after) && after >= 0 ? after : null,
            beforeLines:Number.isFinite(beforeLines) && beforeLines >= 0 ? beforeLines : null,
            afterLines:Number.isFinite(afterLines) && afterLines >= 0 ? afterLines : null,
            beforeAuto:/^(?:1|true|on)$/i.test(String(effectiveSpacing.beforeAutospacing || '')),
            afterAuto:/^(?:1|true|on)$/i.test(String(effectiveSpacing.afterAutospacing || '')),
          });
        });
        vmlLinesChanged = patchVmlLineStylesInPart(documentDoc) || vmlLinesChanged;

        /* Giữ thông tin Tab trước khi docx-preview dựng HTML. Khi không bật
           chế độ thử nghiệm, thư viện chỉ đổi mỗi w:tab thành một em-space nên
           các phương án chỉ gần đúng vị trí Word. Marker được xóa sau render. */
        const settingsEntry = zip.file('word/settings.xml');
        if (settingsEntry) {
          try {
            const settingsXml = await settingsEntry.async('string');
            const settingsDoc = parser.parseFromString(settingsXml, 'application/xml');
            const defaultTabNode = Array.from(settingsDoc.getElementsByTagName('*'))
              .find((node) => localNameOf(node) === 'defaulttabstop');
            const parsedDefault = parseFloat(wordAttribute(defaultTabNode, 'val'));
            if (Number.isFinite(parsedDefault) && parsedDefault > 0) defaultTabTwips = parsedDefault;
          } catch (_) {}
        }

        const appPropertiesEntry = zip.file('docProps/app.xml');
        if (appPropertiesEntry) {
          try {
            const appXml = await appPropertiesEntry.async('string');
            const appDoc = parser.parseFromString(appXml, 'application/xml');
            const pagesNode = Array.from(appDoc.getElementsByTagName('*'))
              .find((node) => localNameOf(node) === 'pages');
            const parsedPages = parseInt(String(pagesNode && pagesNode.textContent || ''), 10);
            if (Number.isFinite(parsedPages) && parsedPages > 0) pageCountHint = parsedPages;
          } catch (_) {}
        }
        const storedRenderedPageBreaks = Array.from(documentDoc.getElementsByTagName('*'))
          .filter((node) => localNameOf(node) === 'lastrenderedpagebreak').length;
        if (storedRenderedPageBreaks > 0) {
          pageCountHint = Math.max(pageCountHint, storedRenderedPageBreaks + 1);
        } else {
          const storedExplicitPageBreaks = Array.from(documentDoc.getElementsByTagName('*'))
            .filter((node) => localNameOf(node) === 'br'
              && wordAttribute(node, 'type').toLowerCase() === 'page').length;
          if (storedExplicitPageBreaks > 0) {
            pageCountHint = Math.max(pageCountHint, storedExplicitPageBreaks + 1);
          }
        }

        const pageFieldPartPaths = Object.keys(zip.files || {}).filter((path) =>
          /^word\/(?:header|footer)\d+\.xml$/i.test(String(path || ''))
        );
        for (const partPath of pageFieldPartPaths) {
          const entry = zip.file(partPath);
          if (!entry) continue;
          try {
            const partXml = await entry.async('string');
            const partDoc = parser.parseFromString(partXml, 'application/xml');
            const pageFieldsInPartChanged = markPageFieldsInPart(partDoc);
            const vmlLinesInPartChanged = patchVmlLineStylesInPart(partDoc);
            if (pageFieldsInPartChanged || vmlLinesInPartChanged) {
              zip.file(partPath, new XMLSerializer().serializeToString(partDoc));
              pageFieldsChanged = pageFieldsChanged || pageFieldsInPartChanged;
              vmlLinesChanged = vmlLinesChanged || vmlLinesInPartChanged;
            }
          } catch (_) {}
        }

        const firstPageNumberType = Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'pgNumType'))[0];
        const parsedPageNumberStart = parseInt(wordAttribute(firstPageNumberType, 'start'), 10);
        if (Number.isFinite(parsedPageNumberStart) && parsedPageNumberStart > 0) {
          pageNumberStart = parsedPageNumberStart;
        }

        Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'p')).forEach((paragraphNode) => {
          const contentTabs = Array.from(paragraphNode.getElementsByTagNameNS(W_NS, 'tab'))
            .filter((tabNode) => localNameOf(tabNode.parentNode) !== 'tabs');
          if (!contentTabs.length) return;

          const paragraphProperties = Array.from(paragraphNode.childNodes || [])
            .find((node) => localNameOf(node) === 'ppr');
          const tabsProperties = paragraphProperties
            ? Array.from(paragraphProperties.childNodes || []).find((node) => localNameOf(node) === 'tabs')
            : null;
          const stops = tabsProperties
            ? Array.from(tabsProperties.childNodes || [])
              .filter((node) => localNameOf(node) === 'tab')
              .map((node) => ({
                positionTwips: parseFloat(wordAttribute(node, 'pos')),
                style: wordAttribute(node, 'val') || 'left',
                leader: wordAttribute(node, 'leader') || 'none',
              }))
              .filter((stop) => Number.isFinite(stop.positionTwips) && stop.positionTwips >= 0)
              .sort((left, right) => left.positionTwips - right.positionTwips)
            : [];

          tabParagraphIndex += 1;
          const marker = `CV7991ORDTAB${tabParagraphIndex}TOKEN`;
          const markerRun = documentDoc.createElementNS(W_NS, 'w:r');
          const markerText = documentDoc.createElementNS(W_NS, 'w:t');
          markerText.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          markerText.textContent = marker;
          markerRun.appendChild(markerText);
          paragraphNode.insertBefore(markerRun,
            paragraphProperties ? paragraphProperties.nextSibling : paragraphNode.firstChild);
          tabParagraphs.push({ marker, stops, tabCount: contentTabs.length });
        });

        /* Shape Word được nhận dạng giống shape PowerPoint: đọc hộp extent,
           điểm neo, z-order và cấu trúc DrawingML trước; sau khi docx-preview
           dàn trang mới gắn lại đối tượng theo đúng hình học nguồn. Nhờ vậy
           nhóm shape không còn thành ô vuông trắng và đối tượng nổi không bị
           thuật toán dàn dòng HTML đẩy sang vị trí khác. */
        const officeMarkerForNode = (sourceNode, isInline) => {
          if (!sourceNode || !sourceNode.parentNode) return '';
          officeObjectIndex += 1;
          const marker = `CV7991ORDOBJ${officeObjectIndex}`;
          if (isInline) {
            const textNode = documentDoc.createElementNS(W_NS, 'w:t');
            textNode.setAttributeNS(XML_NS, 'xml:space', 'preserve');
            textNode.textContent = `${marker}TOKEN`;
            const parentName = localNameOf(sourceNode.parentNode);
            if (parentName === 'r') sourceNode.parentNode.replaceChild(textNode, sourceNode);
            else {
              const run = documentDoc.createElementNS(W_NS, 'w:r');
              run.appendChild(textNode);
              sourceNode.parentNode.replaceChild(run, sourceNode);
            }
            return `${marker}TOKEN`;
          }
          let paragraph = sourceNode.parentNode;
          while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentNode;
          if (!paragraph) return '';
          let paragraphChild = sourceNode;
          while (paragraphChild.parentNode && paragraphChild.parentNode !== paragraph) {
            paragraphChild = paragraphChild.parentNode;
          }
          const bookmarkId = String(nextTableBookmarkId++);
          const bookmarkStart = documentDoc.createElementNS(W_NS, 'w:bookmarkStart');
          bookmarkStart.setAttributeNS(W_NS, 'w:id', bookmarkId);
          bookmarkStart.setAttributeNS(W_NS, 'w:name', marker);
          const bookmarkEnd = documentDoc.createElementNS(W_NS, 'w:bookmarkEnd');
          bookmarkEnd.setAttributeNS(W_NS, 'w:id', bookmarkId);
          paragraph.insertBefore(bookmarkStart, paragraphChild);
          paragraph.insertBefore(bookmarkEnd, paragraphChild);
          sourceNode.parentNode.removeChild(sourceNode);
          return marker;
        };
        const officeAnchorPlan = (container, marker, isInline) => {
          const extent = wpOfficeXmlElements(container, 'extent')[0]
            || wpOfficeXmlElements(container, 'ext')[0];
          const positionH = wpOfficeXmlElements(container, 'positionh')[0];
          const positionV = wpOfficeXmlElements(container, 'positionv')[0];
          const wrapCandidates = [
            ['square', 'wrapsquare'],
            ['tight', 'wraptight'],
            ['through', 'wrapthrough'],
            ['topandbottom', 'wraptopandbottom'],
            ['none', 'wrapnone'],
          ];
          let wrapType = '';
          let wrapNode = null;
          for (const [type, elementName] of wrapCandidates) {
            const candidate = wpOfficeXmlElements(container, elementName)[0];
            if (!candidate) continue;
            wrapType = type;
            wrapNode = candidate;
            break;
          }
          const horizontalOffsetNode = positionH && wpOfficeXmlElements(positionH, 'posoffset')[0];
          const verticalOffsetNode = positionV && wpOfficeXmlElements(positionV, 'posoffset')[0];
          const horizontalAlignNode = positionH && wpOfficeXmlElements(positionH, 'align')[0];
          const verticalAlignNode = positionV && wpOfficeXmlElements(positionV, 'align')[0];
          return {
            marker,
            inline:!!isInline,
            width:Math.max(1, wpOfficeEmuToPx(wpOfficeXmlAttr(extent, 'cx', ''))),
            height:Math.max(1, wpOfficeEmuToPx(wpOfficeXmlAttr(extent, 'cy', ''))),
            horizontalRelative:String(wpOfficeXmlAttr(positionH, 'relativeFrom', isInline ? 'character' : 'paragraph')).toLowerCase(),
            verticalRelative:String(wpOfficeXmlAttr(positionV, 'relativeFrom', isInline ? 'line' : 'paragraph')).toLowerCase(),
            horizontalOffset:wpOfficeEmuToPx(horizontalOffsetNode && horizontalOffsetNode.textContent),
            verticalOffset:wpOfficeEmuToPx(verticalOffsetNode && verticalOffsetNode.textContent),
            horizontalAlign:String(horizontalAlignNode && horizontalAlignNode.textContent || '').toLowerCase(),
            verticalAlign:String(verticalAlignNode && verticalAlignNode.textContent || '').toLowerCase(),
            wrapType,
            wrapText:String(wpOfficeXmlAttr(wrapNode, 'wrapText', '')).toLowerCase(),
            distanceTop:wpOfficeEmuToPx(wpOfficeXmlAttr(container, 'distT', '')),
            distanceBottom:wpOfficeEmuToPx(wpOfficeXmlAttr(container, 'distB', '')),
            distanceLeft:wpOfficeEmuToPx(wpOfficeXmlAttr(container, 'distL', '')),
            distanceRight:wpOfficeEmuToPx(wpOfficeXmlAttr(container, 'distR', '')),
            behindText:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(container, 'behindDoc', ''))),
            zIndex:Math.max(1, wpOfficeNumber(wpOfficeXmlAttr(container, 'relativeHeight', officeObjectIndex), officeObjectIndex)),
          };
        };
        let officeThemeColors = Object.create(null);
        let officeThemeLineWidths = [];
        try {
          const themeEntry = zip.file('word/theme/theme1.xml');
          if (themeEntry) {
            const themeDoc = parser.parseFromString(
              await themeEntry.async('string'), 'application/xml'
            );
            officeThemeColors = wpOfficeThemeColors(themeDoc);
            const lineStyles = wpOfficeXmlElements(themeDoc, 'lnstylelst')[0];
            officeThemeLineWidths = wpOfficeXmlChildren(lineStyles, 'ln').map((line) =>
              wpOfficeEmuToPx(wpOfficeXmlAttr(line, 'w', '')));
          }
        } catch (_) {}
        const officeAlternateContentRoot = (node) => {
          let current = node;
          while (current && current !== documentDoc) {
            if (localNameOf(current) === 'fallback') return null;
            if (localNameOf(current) === 'choice'
                && current.parentNode
                && localNameOf(current.parentNode) === 'alternatecontent') {
              return current.parentNode;
            }
            current = current.parentNode;
          }
          return node;
        };
        const officeParagraphOnlyContainsObject = (sourceNode) => {
          if (!sourceNode) return false;
          let paragraph = sourceNode.parentNode;
          while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentNode;
          if (!paragraph) return false;
          return !Array.from(paragraph.getElementsByTagName('*')).some((node) => {
            if (node === sourceNode || sourceNode.contains(node)) return false;
            const name = localNameOf(node);
            if (name === 't' || name === 'instrtext' || name === 'deltext') {
              return String(node.textContent || '').trim() !== '';
            }
            return /^(?:tab|br|cr|drawing|pict|object|omath|omathpara|sym|footnotereference|endnotereference)$/.test(name);
          });
        };
        const officeParagraphContainsCutSymbol = (sourceNode) => {
          if (!sourceNode) return false;
          let paragraph = sourceNode.parentNode;
          while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentNode;
          if (!paragraph) return false;
          return Array.from(paragraph.getElementsByTagNameNS(W_NS, 't')).some((node) =>
            String(node.textContent || '').includes('\u2702')
          );
        };
        const officeFollowingEmptyParagraphTarget = (sourceNode) => {
          if (!sourceNode) return null;
          let paragraph = sourceNode.parentNode;
          while (paragraph && localNameOf(paragraph) !== 'p') paragraph = paragraph.parentNode;
          if (!paragraph || !paragraph.parentNode) return null;
          const nextElement = (node) => {
            let next = node && node.nextSibling;
            while (next && next.nodeType !== Node.ELEMENT_NODE) next = next.nextSibling;
            return next;
          };
          let cursor = nextElement(paragraph);
          let count = 0;
          while (cursor && localNameOf(cursor) === 'p'
              && sourceEmptyWordParagraphs.has(cursor)) {
            count += 1;
            cursor = nextElement(cursor);
          }
          return count > 0 && cursor && localNameOf(cursor) === 'p'
            ? { paragraph:cursor, count } : null;
        };
        const wordChartPlans = Object.create(null);
        try {
          const relationshipEntry = zip.file('word/_rels/document.xml.rels');
          const relationshipDoc = relationshipEntry
            ? parser.parseFromString(await relationshipEntry.async('string'), 'application/xml') : null;
          const chartRelationships = wpOfficeXmlElements(relationshipDoc, 'relationship')
            .filter((node) => /\/chart$/i.test(String(wpOfficeXmlAttr(node, 'Type', ''))));
          for (const relationship of chartRelationships) {
            const relationId = String(wpOfficeXmlAttr(relationship, 'Id', '')).trim();
            const chartPath = wpPptxPackagePath(
              documentPath, String(wpOfficeXmlAttr(relationship, 'Target', ''))
            );
            const chartEntry = zip.file(chartPath);
            if (!relationId || !chartEntry) continue;
            const chartDoc = parser.parseFromString(
              await chartEntry.async('string'), 'application/xml'
            );
            const chartPlan = wpOfficeChartPlanFromXml(chartDoc, officeThemeColors);
            if (chartPlan) wordChartPlans[relationId] = chartPlan;
          }
        } catch (_) {}
        const drawingNodes = Array.from(documentDoc.getElementsByTagNameNS(W_NS, 'drawing'));
        drawingNodes.forEach((drawingNode) => {
          if (!drawingNode || !drawingNode.parentNode) return;
          const sourceNode = officeAlternateContentRoot(drawingNode);
          if (!sourceNode || !sourceNode.parentNode) return;
          const drawingLink = wpOfficeXmlElements(drawingNode, 'hlinkclick')[0];
          let hyperlink = hyperlinkTargets[wpOfficeXmlAttr(drawingLink, 'id', '')] || '';
          for (let ancestor = sourceNode.parentElement; !hyperlink && ancestor; ancestor = ancestor.parentElement) {
            if (ancestor.localName === 'hyperlink') hyperlink = hyperlinkTargets[wpOfficeXmlAttr(ancestor, 'id', '')]
              || (wpOfficeXmlAttr(ancestor, 'anchor', '') ? '#' + wpOfficeXmlAttr(ancestor, 'anchor', '') : '');
          }
          const container = wpOfficeXmlElements(drawingNode, 'anchor')[0]
            || wpOfficeXmlElements(drawingNode, 'inline')[0];
          if (!container) return;
          const groupNode = wpOfficeXmlElements(drawingNode, 'wgp')[0];
          const shapeNode = wpOfficeXmlElements(drawingNode, 'wsp')[0];
          const pictureNode = wpOfficeXmlElements(drawingNode, 'pic')[0];
          const pictureBlip = pictureNode && wpOfficeXmlElements(pictureNode, 'blip')[0];
          const pictureRelationId = String(wpOfficeXmlAttr(pictureBlip, 'embed', '')).trim();
          const picture = pictureRelationId ? imageMap[pictureRelationId] : null;
          const chartNode = wpOfficeXmlElements(drawingNode, 'chart')[0];
          const chartRelationId = String(wpOfficeXmlAttr(chartNode, 'id', '')).trim();
          const chartPlan = chartRelationId ? wordChartPlans[chartRelationId] : null;
          let canDisplayPicture = false;
          if (picture) {
            try {
              canDisplayPicture = typeof cv7991CanBrowserDisplayPresenterImage === 'function'
                ? !!cv7991CanBrowserDisplayPresenterImage(picture) : !!picture.data;
            } catch (_) { canDisplayPicture = false; }
          }
          if (!groupNode && !shapeNode && !canDisplayPicture && !chartPlan) return;
          const groupData = groupNode
            ? wpOfficeWordGroupPlanFromDrawing(drawingNode, imageMap) : null;
          const textBoxTablePlan = !groupData && shapeNode
            ? wpOfficeTextBoxTablePlanFromShape(shapeNode, imageMap) : null;
          const shapePlan = !groupData && !textBoxTablePlan && shapeNode
            ? wpOfficeShapePlanFromNode(shapeNode, officeThemeColors) : null;
          if (shapePlan && shapeNode) {
            const properties = wpOfficeXmlChildren(shapeNode, 'sppr')[0];
            const line = wpOfficeXmlChildren(properties, 'ln')[0];
            const style = wpOfficeXmlChildren(shapeNode, 'style')[0];
            const reference = wpOfficeXmlChildren(style, 'lnref')[0];
            const index = Number(wpOfficeXmlAttr(reference, 'idx', '0')) - 1;
            const themeWidth = officeThemeLineWidths[index];
            if (wpOfficeXmlAttr(line, 'w', '') === '' && themeWidth > 0) {
              shapePlan.strokeWidth = Math.max(.6, Math.min(16, themeWidth));
            }
          }
          if (!groupData && !textBoxTablePlan && !shapePlan && !canDisplayPicture && !chartPlan) return;
          const shapeGeometrySupported = !shapePlan
            || !!shapePlan.hasCustomGeometry
            || String(shapePlan.preset || '').toLowerCase() === 'textnoshape'
            || !!(window.mvipOfficePresetGeometry
              && window.mvipOfficePresetGeometry.hasPreset(shapePlan.presetName));
          /* Hình preset và custom geometry đều đi qua bộ dựng DrawingML dùng
             chung. Chỉ giữ nguyên nhánh Office gốc khi gặp một preset lạ mà
             phiên bản hiện tại chưa có công thức, tuyệt đối không thay nó
             bằng hình chữ nhật giả. */
          if (shapePlan && !shapeGeometrySupported) return;
          /* Line/straight connector liền, không có đầu mũi tên tiếp tục dùng
             VML native để bảo toàn các gạch chân của file cũ. Đường nét đứt
             phải đi qua DrawingML vì docx-preview thường bỏ cả nét hoặc mất
             prstDash; đường có headEnd/tailEnd cũng dùng vector như trước. */
          const isDashedWordLine = !!(shapePlan
            && /^(?:line|straightconnector1)$/.test(String(shapePlan.preset || '').toLowerCase())
            && !/^(?:|solid)$/.test(String(shapePlan.dashStyle || '').toLowerCase()));
          const isNativeWordLine = !!(shapePlan
            && /^(?:line|straightconnector1)$/.test(String(shapePlan.preset || '').toLowerCase())
            && !shapePlan.startArrow
            && !shapePlan.endArrow
            && /^(?:|solid)$/.test(String(shapePlan.dashStyle || '').toLowerCase()));
          if (isNativeWordLine) return;
          const isInline = wpOfficeLocalName(container) === 'inline';
          const sourceAnchor = officeAnchorPlan(container, '', false);
          /* Rectangle 5 trong file mẫu là một shape nổi nhưng đoạn chứa shape
             không có chữ/đối tượng nào khác; Word đặt nó gần như tại (0,0)
             của chính đoạn đó. Giữ dạng này trong luồng đoạn để thứ tự nguồn
             Câu 1 -> rectangle -> đáp án không bị lớp tuyệt đối đổi chỗ. */
          const useParagraphFlowAnchor = !!(!isInline
            && shapePlan
            && String(shapePlan.preset || '').toLowerCase() === 'rect'
            && !(shapePlan.textLines || []).length
            && !wpOfficeNumber(shapePlan.rotation)
            && wpOfficeXmlElements(container, 'wrapnone').length
            && /^(?:column|paragraph)$/.test(String(sourceAnchor.horizontalRelative || ''))
            && String(sourceAnchor.verticalRelative || '') === 'paragraph'
            && Math.abs(wpOfficeNumber(sourceAnchor.horizontalOffset)) <= 4
            && Math.abs(wpOfficeNumber(sourceAnchor.verticalOffset)) <= 4
            && wpOfficeNumber(sourceAnchor.height) <= 48
            && officeParagraphOnlyContainsObject(sourceNode));
          /* Ảnh raster có bọc chữ phải nằm ngay trong luồng đoạn. Bookmark
             tuyệt đối chỉ giữ được tọa độ ảnh, nhưng không dành vùng cho chữ;
             đây là nguyên nhân đầu câu a), b) bị ảnh Câu 14 che mất. */
          const useTextWrapFlowAnchor = !!(!isInline
            && canDisplayPicture
            && !groupData
            && !shapePlan
            && !chartPlan
            && /^(?:square|tight|through|topandbottom)$/.test(
              String(sourceAnchor.wrapType || '')
            ));
          /* Nhóm Shapes wrapNone nằm cùng đoạn với văn bản không thể dựa vào
             bookmark rỗng: docx-preview có thể bỏ marker đó và bước hydrate
             không còn điểm neo. Thay nhóm bằng token nội dòng, rồi đặt lại
             tuyệt đối theo positionH/positionV của Word. Token không chiếm
             diện tích nên chữ trong đoạn vẫn dàn đúng như bản gốc. */
          // Keep paragraph-relative shapes attached to their own paragraphs:
          // wrapping an earlier picture may move those paragraphs afterwards.
          const useShapeParagraphAnchor = !!(!isInline && shapePlan && !isDashedWordLine
            && !useParagraphFlowAnchor
            && String(sourceAnchor.wrapType || '').toLowerCase() === 'none'
            && String(sourceAnchor.verticalRelative || '') === 'paragraph'
            && /^(?:column|paragraph|margin|page)$/.test(String(sourceAnchor.horizontalRelative || '')));
          const useOverlayFlowAnchor = useShapeParagraphAnchor || !!(!isInline
            && !useParagraphFlowAnchor
            && groupData
            && String(sourceAnchor.wrapType || '').toLowerCase() === 'none'
            && /^(?:column|paragraph|character)$/.test(
              String(sourceAnchor.horizontalRelative || '')
            )
            && /^(?:paragraph|line|character)$/.test(
              String(sourceAnchor.verticalRelative || '')
            ));
          const centeredCutSymbol = isDashedWordLine
            && officeParagraphContainsCutSymbol(sourceNode);
          const followingEmptyTarget = useOverlayFlowAnchor && groupData
            ? officeFollowingEmptyParagraphTarget(sourceNode) : null;
          const marker = officeMarkerForNode(
            sourceNode,
            isInline || useParagraphFlowAnchor || useTextWrapFlowAnchor || useOverlayFlowAnchor
          );
          if (!marker) return;
          let flowAfterMarker = '';
          if (followingEmptyTarget && followingEmptyTarget.paragraph) {
            flowAfterMarker = `${String(marker).replace(/TOKEN$/, '')}AFTER`;
            const flowBookmarkId = String(nextTableBookmarkId++);
            const flowBookmarkStart = documentDoc.createElementNS(W_NS, 'w:bookmarkStart');
            flowBookmarkStart.setAttributeNS(W_NS, 'w:id', flowBookmarkId);
            flowBookmarkStart.setAttributeNS(W_NS, 'w:name', flowAfterMarker);
            const flowBookmarkEnd = documentDoc.createElementNS(W_NS, 'w:bookmarkEnd');
            flowBookmarkEnd.setAttributeNS(W_NS, 'w:id', flowBookmarkId);
            const flowParagraphProperties = directChildByName(
              followingEmptyTarget.paragraph, 'pPr'
            );
            const flowInsertionPoint = flowParagraphProperties
              ? flowParagraphProperties.nextSibling : followingEmptyTarget.paragraph.firstChild;
            followingEmptyTarget.paragraph.insertBefore(flowBookmarkStart, flowInsertionPoint);
            followingEmptyTarget.paragraph.insertBefore(flowBookmarkEnd, flowInsertionPoint);
          }
          officeObjects.push(Object.assign(
            officeAnchorPlan(
              container,
              marker,
              isInline || useParagraphFlowAnchor || useTextWrapFlowAnchor || useOverlayFlowAnchor
            ),
            { hyperlink },
            centeredCutSymbol ? { centeredCutSymbol:true } : null,
            useParagraphFlowAnchor ? { flowAnchored:true } : null,
            useTextWrapFlowAnchor ? { flowWrapped:true } : null,
            useOverlayFlowAnchor ? { overlayAnchored:true } : null,
            useShapeParagraphAnchor ? { paragraphPositioned:true } : null,
            flowAfterMarker ? {
              flowAfterMarker,
              followingEmptyLineCount:Number(followingEmptyTarget.count) || 0,
            } : null,
            groupData
              ? { renderType:'word-group', groupData }
              : (textBoxTablePlan
                ? { renderType:'textbox-table', tablePlan:textBoxTablePlan }
                : (shapePlan
                  ? { renderType:'shape', shapePlan }
                  : (chartPlan
                    ? { renderType:'chart', chartPlan }
                    : { renderType:'image', imageRelationId:pictureRelationId })))
          ));
        });

        /* Dùng đúng cơ chế nhận diện của “Trình chiếu câu hỏi từ file Word”:
           mỗi m:oMath (hoặc m:oMath nằm trong m:oMathPara) được lưu nguyên XML,
           thay bằng marker theo đúng thứ tự trong tài liệu, rồi dựng lại bằng
           cv7991PresenterEquationHtml sau khi docx-preview hoàn tất bố cục.
           Không chọn riêng hệ phương trình: phân số, căn, chỉ số, tích phân,
           dấu, ma trận và mọi Equation khác đều đi qua cùng bộ đọc OMML. */
        const mathRoots = Array.from(documentDoc.getElementsByTagName('*')).filter((node) => {
          const name = localNameOf(node);
          if (name === 'omathpara') return true;
          if (name !== 'omath') return false;
          let ancestor = node.parentNode;
          while (ancestor && ancestor !== documentDoc) {
            if (localNameOf(ancestor) === 'omathpara') return false;
            ancestor = ancestor.parentNode;
          }
          return true;
        });
        mathRoots.forEach((mathRoot) => {
          if (!mathRoot || !mathRoot.parentNode) return;
          const isMathParagraph = localNameOf(mathRoot) === 'omathpara';
          const sourceNode = isMathParagraph
            ? (directChildByName(mathRoot, 'oMath') || mathRoot)
            : mathRoot;
          let rawXml = '';
          try { rawXml = new XMLSerializer().serializeToString(sourceNode); } catch (_) {}
          if (!rawXml) return;
          equationIndex += 1;
          const marker = `CV7991ORDOMML${equationIndex}TOKEN`;
          const markerRun = markerRunForEquation(sourceNode, marker);
          const parentName = localNameOf(mathRoot.parentNode);
          if (isMathParagraph && parentName !== 'p' && parentName !== 'r') {
            const paragraph = documentDoc.createElementNS(W_NS, 'w:p');
            const alignment = mathParagraphAlignment(mathRoot);
            if (alignment) {
              const paragraphProperties = documentDoc.createElementNS(W_NS, 'w:pPr');
              const justification = documentDoc.createElementNS(W_NS, 'w:jc');
              justification.setAttributeNS(W_NS, 'w:val', alignment);
              paragraphProperties.appendChild(justification);
              paragraph.appendChild(paragraphProperties);
            }
            paragraph.appendChild(markerRun);
            mathRoot.parentNode.replaceChild(paragraph, mathRoot);
          } else if (parentName === 'r') {
            const markerText = Array.from(markerRun.childNodes || [])
              .find((child) => localNameOf(child) === 't');
            mathRoot.parentNode.replaceChild(markerText || markerRun, mathRoot);
          } else {
            mathRoot.parentNode.replaceChild(markerRun, mathRoot);
          }
          equations.push({
            marker,
            equation: {
              id: `ordinary_omml_${equationIndex}`,
              xml: rawXml,
              type: 'omml',
            },
            isBlock: isMathParagraph,
          });
        });

        Array.from(documentDoc.getElementsByTagName('*')).forEach((objectNode) => {
          const objectName = String(objectNode && (objectNode.localName || objectNode.nodeName) || '')
            .split(':').pop().toLowerCase();
          if (objectName !== 'object' || !objectNode.parentNode) return;
          const relationIds = [];
          const tokens = cv7991ImagePlaceholdersForNode(objectNode, imageMap, 12);
          (Array.isArray(tokens) ? tokens : []).forEach((token) => {
            const match = String(token || '').match(/^\[\[CV7991_IMG:([^\]]+)\]\]$/);
            const relId = match ? String(match[1] || '').trim() : '';
            if (relId && !relationIds.includes(relId)) relationIds.push(relId);
          });
          const relId = relationIds.find((id) => imageMap[id]
            && cv7991PresenterImageIsFormula(imageMap[id]));
          if (!relId) return;
          const image = imageMap[relId];

          formulaIndex += 1;
          const marker = `CV7991ORDMATH${formulaIndex}TOKEN`;
          const textNode = documentDoc.createElementNS(W_NS, 'w:t');
          textNode.setAttributeNS(XML_NS, 'xml:space', 'preserve');
          textNode.textContent = marker;
          const parentName = String(objectNode.parentNode.localName || objectNode.parentNode.nodeName || '')
            .split(':').pop().toLowerCase();
          let wordPositionHalfPoints = 0;
          if (parentName === 'r') {
            /* Trình chiếu câu hỏi Word không mang w:position của OLE sang HTML;
               vì vậy chế độ tài liệu thông thường cũng bỏ riêng thuộc tính này
               trước khi gọi đúng bộ căn baseline chung. */
            const runProperties = Array.from(objectNode.parentNode.childNodes || []).find((child) => {
              const childName = String(child && (child.localName || child.nodeName) || '')
                .split(':').pop().toLowerCase();
              return childName === 'rpr';
            });
            if (runProperties) {
              Array.from(runProperties.childNodes || []).forEach((propertyNode) => {
                const propertyName = String(propertyNode && (propertyNode.localName || propertyNode.nodeName) || '')
                  .split(':').pop().toLowerCase();
                if (propertyName === 'position' && propertyNode.parentNode) {
                  const parsedPosition = parseFloat(wordAttribute(propertyNode, 'val'));
                  if (Number.isFinite(parsedPosition)) wordPositionHalfPoints = parsedPosition;
                  propertyNode.parentNode.removeChild(propertyNode);
                }
              });
            }
            objectNode.parentNode.replaceChild(textNode, objectNode);
          } else {
            const runNode = documentDoc.createElementNS(W_NS, 'w:r');
            runNode.appendChild(textNode);
            objectNode.parentNode.replaceChild(runNode, objectNode);
          }
          formulas.push({
            marker,
            relId,
            widthPt: Math.max(0, Number(image.displayWidthPt) || 0),
            heightPt: Math.max(0, Number(image.displayHeightPt) || 0),
            wordPositionHalfPoints,
          });
        });

        if (!embeddedVideos.length && !formulas.length && !equations.length && !tabParagraphs.length
            && !paragraphLayouts.length
            && !tableLayouts.length && !officeObjects.length
            && !pageFieldsChanged && !vmlLinesChanged && !manualHeaderAlignmentChanged
            && !tableTypographyMaterializedChanged
            && !tableParagraphSpacingMaterializedChanged
            && !wingdingsSymbolsChanged
            && !emptyParagraphsMaterializedChanged
            && !floatingTablesMaterializedChanged && !hyperlinkFieldsChanged) {
          return Object.assign({}, untouched, {
            pageCountHint,
            pageNumberStart,
            suppressFirstPageHeader,
          });
        }
        if (formulas.length) {
          const referencedFormulaTokens = formulas
            .map((formula) => cv7991ImagePlaceholderToken(formula.relId))
            .join(' ');
          await cv7991PreparePresenterImages(imageMap, [{ text: referencedFormulaTokens }], {});
        }
        zip.file(documentPath, new XMLSerializer().serializeToString(documentDoc));
        return {
          arrayBuffer: await zip.generateAsync({ type: 'arraybuffer', compression: 'DEFLATE' }),
          embeddedVideos,
          formulas,
          equations,
          imageMap,
          tabParagraphs,
          paragraphLayouts,
          tableLayouts,
          officeObjects,
          defaultTabTwips,
          pageCountHint,
          pageNumberStart,
          suppressFirstPageHeader,
        };
      } catch (error) {
        console.warn('Không đưa được công thức MathType cũ vào đúng luồng Word:', error);
        return untouched;
      }
    }

    function wpOrdinaryLinearMathTypeModel(value) {
      let tex = String(value || '').trim();
      if (!tex) return null;
      const replacements = [
        [/\\(?:left|right)\b/g, ''],
        [/\\cdot\b/g, '·'],
        [/\\times\b/g, '×'],
        [/\\div\b/g, '÷'],
        [/\\pm\b/g, '±'],
        [/\\mp\b/g, '∓'],
        [/\\leq?\b/g, '≤'],
        [/\\geq?\b/g, '≥'],
        [/\\neq?\b/g, '≠'],
        [/\\approx\b/g, '≈'],
      ];
      replacements.forEach(([pattern, replacement]) => { tex = tex.replace(pattern, replacement); });
      tex = tex.replace(/\s+/g, '');
      if (!tex || tex.length > 120 || /\\/.test(tex)) return null;
      if (!/^[A-Za-zΑ-Ωα-ω0-9+\-−=×÷·±∓(),.;:<>≤≥≠≈\[\]|^_{}]+$/.test(tex)) return null;
      if (!/[0-9+\-−=×÷·±∓(),.;:<>≤≥≠≈\[\]|^_]/.test(tex)) return null;

      const tokens = [];
      const isLetter = (character) => /[A-Za-zΑ-Ωα-ω]/.test(character);
      const isDigit = (character) => /[0-9]/.test(character);
      let index = 0;
      while (index < tex.length) {
        const character = tex[index];
        if (isLetter(character)) {
          let end = index + 1;
          while (end < tex.length && isLetter(tex[end])) end += 1;
          tokens.push({ type: 'letters', value: tex.slice(index, end) });
          index = end;
          continue;
        }
        if (isDigit(character)) {
          let end = index + 1;
          while (end < tex.length && isDigit(tex[end])) end += 1;
          tokens.push({ type: 'digits', value: tex.slice(index, end) });
          index = end;
          continue;
        }
        if (character === '^' || character === '_') {
          const type = character === '^' ? 'sup' : 'sub';
          index += 1;
          if (index >= tex.length) return null;
          let script = '';
          if (tex[index] === '{') {
            const close = tex.indexOf('}', index + 1);
            if (close < 0) return null;
            script = tex.slice(index + 1, close);
            if (!script || /[{}]/.test(script)) return null;
            index = close + 1;
          } else {
            script = tex[index];
            index += 1;
          }
          if (!/^[A-Za-zΑ-Ωα-ω0-9+\-−(),.]+$/.test(script)) return null;
          tokens.push({ type, value: script });
          continue;
        }
        if (character === '{' || character === '}') return null;
        tokens.push({ type: 'symbol', value: character });
        index += 1;
      }
      return tokens.length ? { text: tex, tokens } : null;
    }

    function wpOrdinaryMathTypeTextExpression(model, rawTex) {
      if (!model || !Array.isArray(model.tokens) || !model.tokens.length) return null;
      const expression = document.createElement('span');
      expression.className = 'mvip-ordinary-mathtype-text-expression';
      expression.setAttribute('aria-label', String(model.text || ''));
      expression.style.setProperty('display', 'inline-block', 'important');
      expression.style.setProperty('font-family', '"Times New Roman", Times, serif', 'important');
      expression.style.setProperty('font-style', 'normal', 'important');
      expression.style.setProperty('font-weight', /\\mathbf\s*\{/i.test(rawTex) ? '700' : '400', 'important');
      expression.style.setProperty('font-size', '1em', 'important');
      expression.style.setProperty('line-height', '1', 'important');
      expression.style.setProperty('font-kerning', 'normal', 'important');
      expression.style.setProperty('font-feature-settings', '"kern" 1', 'important');
      expression.style.setProperty('letter-spacing', '0', 'important');
      expression.style.setProperty('word-spacing', '0', 'important');
      expression.style.setProperty('white-space', 'nowrap', 'important');
      expression.style.setProperty('vertical-align', 'baseline', 'important');
      expression.style.setProperty('margin', '0', 'important');
      expression.style.setProperty('padding', '0', 'important');
      expression.style.setProperty('transform', 'translateY(0px)', 'important');

      const romanFunctions = /^(?:sin|cos|tan|cot|sec|csc|log|ln|lim|max|min)$/i;
      const operatorToken = /^[+\-−=×÷·±∓<>≤≥≠≈]$/;
      model.tokens.forEach((token) => {
        const isScript = token.type === 'sup' || token.type === 'sub';
        const part = document.createElement(isScript ? token.type : 'span');
        part.textContent = String(token.value || '');
        part.style.setProperty('font-family', 'inherit', 'important');
        part.style.setProperty('line-height', isScript ? '0' : 'inherit', 'important');
        if (isScript) {
          part.style.setProperty('font-size', '0.62em', 'important');
          part.style.setProperty('font-style', /[A-Za-zΑ-Ωα-ω]/.test(token.value) ? 'italic' : 'normal', 'important');
          part.style.setProperty('vertical-align', token.type === 'sup' ? 'super' : 'sub', 'important');
          part.style.setProperty('margin-left', token.type === 'sup' ? '0.08em' : '0.035em', 'important');
          part.style.setProperty('margin-right', '0', 'important');
        } else {
          part.style.setProperty('font-size', 'inherit', 'important');
          if (token.type === 'letters') {
            const forceRoman = romanFunctions.test(token.value)
              || /\\(?:mathrm|text|operatorname)\s*\{/i.test(rawTex);
            part.style.setProperty('font-style', forceRoman ? 'normal' : 'italic', 'important');
            part.style.setProperty('letter-spacing', /^[A-Z]{2,}$/.test(token.value) ? '-0.035em' : '0', 'important');
          } else {
            part.style.setProperty('font-style', 'normal', 'important');
          }
          if (operatorToken.test(token.value)) {
            part.style.setProperty('display', 'inline-block', 'important');
            part.style.setProperty('margin-left', token.value === '·' ? '0.08em' : '0.12em', 'important');
            part.style.setProperty('margin-right', token.value === '·' ? '0.08em' : '0.12em', 'important');
          }
        }
        expression.appendChild(part);
      });
      return expression;
    }

    function wpOrdinaryMathTypeSvgFragment(rawTex) {
      const tex = String(rawTex || '').trim();
      if (!tex || !window.MathJax || typeof window.MathJax.tex2svg !== 'function') return null;
      try {
        const formulaTex = /^\\displaystyle\b/.test(tex) ? tex : '\\displaystyle ' + tex;
        const svg = cv7991MathJaxSvgFromTex(window.MathJax, formulaTex);
        if (!(svg instanceof SVGElement)) return null;
        svg.setAttribute('class', ((svg.getAttribute('class') || '') + ' single-exam-mathjax-svg').trim());
        svg.setAttribute('color', 'currentColor');
        svg.style.color = 'currentColor';
        svg.style.background = 'transparent';
        svg.style.maxWidth = '100%';
        svg.style.overflow = 'visible';

        /* Giữ nguyên hình học accent do MathJax tính trên đúng phần tử cơ sở.
           Bản cũ lấy khoảng cách tới node kế tiếp/toàn SVG để tự kéo dài mũi
           tên, khiến vec(a), vec(i)... chạy xuyên qua các phần khác của công thức. */

        const outer = document.createElement('span');
        const visualLineCount = typeof cv7991FormulaVisualLineCount === 'function'
          ? cv7991FormulaVisualLineCount({ presenterTex: tex }) : 1;
        outer.className = 'mvip-ordinary-omml-equation mvip-ordinary-mathtype-equation'
          + (visualLineCount > 1 ? ' is-stacked' : ' is-single-line');
        outer.style.setProperty('--cv-formula-line-count', String(Math.max(1, visualLineCount || 1)));
        outer.setAttribute('aria-label', tex);
        const inner = document.createElement('span');
        inner.className = 'single-exam-mathjax-equation';
        inner.appendChild(svg);
        outer.appendChild(inner);
        return outer;
      } catch (_) {
        return null;
      }
    }

    function wpInteractiveQuestionMathTypeFragment(formula, imageMap) {
      const relId = String(formula && formula.relId || '').trim();
      const image = imageMap && imageMap[relId];
      if (!image) return null;

      let extractedTex = '';
      let directMtefTex = '';
      try {
        extractedTex = typeof cv7991ExtractMathTypeTex === 'function'
          ? String(cv7991ExtractMathTypeTex(image) || '') : '';
      } catch (_) {}
      try {
        directMtefTex = typeof cv7991ExtractMathTypeMtefTex === 'function'
          ? String(cv7991ExtractMathTypeMtefTex(image) || '') : '';
      } catch (_) {}

      const rawTex = String(extractedTex || directMtefTex || image.presenterTex || image.embeddedTex || '').trim();
      if (!rawTex) return null;

      const normalizeTex = (value) => typeof cv7991NormalizeSingleNumberMathTypeTex === 'function'
        ? cv7991NormalizeSingleNumberMathTypeTex(value)
        : String(value || '').replace(/\s+/g, '').trim();
      const normalizedTex = normalizeTex(rawTex);

      /* Một chữ số/biến đơn không cần MathJax: dùng trực tiếp chữ toán 1em để
         không còn tình trạng 1,2,3,4 phóng lớn hơn hẳn phương án. */
      if (/^[0-9]$/.test(normalizedTex)) {
        const number = document.createElement('span');
        number.className = 'mvip-interactive-live-mathtype is-simple-number';
        number.textContent = normalizedTex;
        number.setAttribute('aria-label', normalizedTex);
        return number;
      }

      const latinMathText = /^(?:[A-Za-z]|[A-Z]{2,24})$/.test(normalizedTex) ? normalizedTex : '';
      if (latinMathText) {
        const symbol = document.createElement('span');
        symbol.className = 'mvip-interactive-live-mathtype is-simple-symbol';
        symbol.textContent = latinMathText;
        symbol.setAttribute('aria-label', latinMathText);
        symbol.style.fontStyle = /\\(?:mathrm|text|operatorname)\s*\{/i.test(rawTex) ? 'normal' : 'italic';
        return symbol;
      }

      /* Từ đây trở đi để MathJax tự bố trí toàn bộ công thức. Như vậy sin/cos/tan,
         phân số, chỉ số trên/dưới, căn... dùng cùng một hệ baseline tự nhiên,
         không còn nhánh chữ tự dựng ép vị trí. */

      /* Công thức dựng trực tiếp thành SVG MathJax ở textstyle.
         Không tạo PNG/IMG trung gian. */
      if (window.MathJax && typeof window.MathJax.tex2svg === 'function') {
        try {
          const formulaTex = /^\\(?:textstyle|displaystyle)\b/.test(rawTex)
            ? rawTex.replace(/^\\displaystyle\b/, '\\textstyle')
            : '\\textstyle ' + rawTex;
          const svg = cv7991MathJaxSvgFromTex(window.MathJax, formulaTex);
          if (svg instanceof SVGElement) {
            svg.setAttribute('class',
              ((svg.getAttribute('class') || '') + ' single-exam-mathjax-svg mvip-interactive-live-mathtype-svg').trim());
            svg.setAttribute('color', 'currentColor');
            svg.style.color = 'currentColor';
            svg.style.background = 'transparent';
            svg.style.overflow = 'visible';
            /* Giữ nguyên width/height/vertical-align do MathJax sinh ra.
               Đây chính là các thông số ascent/descent tự nhiên của công thức. */

            const outer = document.createElement('span');
            outer.className = 'mvip-interactive-live-mathtype is-mathjax';
            outer.setAttribute('aria-label', rawTex);
            const inner = document.createElement('span');
            inner.className = 'single-exam-mathjax-equation mvip-interactive-live-mathtype-inner';
            inner.appendChild(svg);
            outer.appendChild(inner);
            return outer;
          }
        } catch (_) {}
      }

      /* Nếu MTEF quá lạ, vẫn ưu tiên chữ công thức thay vì ảnh raster. */
      const fallback = document.createElement('span');
      fallback.className = 'mvip-interactive-live-mathtype is-tex-fallback';
      fallback.textContent = normalizedTex || rawTex;
      fallback.setAttribute('aria-label', rawTex);
      return fallback;
    }

    function wpOrdinaryMathTypeWordBox(content, formula) {
      const node = content instanceof Node ? content : document.createTextNode(String(content || ''));
      const widthPt = Math.max(0, Number(formula && formula.widthPt) || 0);
      const heightPt = Math.max(0, Number(formula && formula.heightPt) || 0);
      const positionHalfPoints = Number(formula && formula.wordPositionHalfPoints) || 0;
      const box = document.createElement('span');
      box.className = 'mvip-ordinary-word-mathtype-box';
      if (widthPt > 0) {
        box.style.setProperty('width', `${Math.round(widthPt * 1000) / 1000}pt`, 'important');
        box.style.setProperty('min-width', `${Math.round(widthPt * 1000) / 1000}pt`, 'important');
        box.style.setProperty('max-width', `${Math.round(widthPt * 1000) / 1000}pt`, 'important');
      }
      if (heightPt > 0) {
        box.style.setProperty('height', `${Math.round(heightPt * 1000) / 1000}pt`, 'important');
        box.style.setProperty('min-height', `${Math.round(heightPt * 1000) / 1000}pt`, 'important');
        box.style.setProperty('max-height', `${Math.round(heightPt * 1000) / 1000}pt`, 'important');
      }
      /* w:position dùng nửa point: số dương nâng công thức lên, số âm hạ xuống. */
      box.style.setProperty(
        'vertical-align',
        `${Math.round((positionHalfPoints / 2) * 1000) / 1000}pt`,
        'important'
      );
      box.dataset.wordPositionHalfPoints = String(positionHalfPoints);
      if (widthPt > 0) box.dataset.wordWidthPt = String(widthPt);
      if (heightPt > 0) box.dataset.wordHeightPt = String(heightPt);

      /* Không gắn trực tiếp MathJax vào box: SVG MathJax có kích thước nội tại
         lớn hơn khung OLE ở một số file Equation.DSMT4. Dùng một lớp visual để
         đo phần nét rồi co lại đúng trong khung Word mà không thay đổi line-box. */
      const visual = document.createElement('span');
      visual.className = 'mvip-ordinary-word-mathtype-visual';
      visual.appendChild(node);
      box.appendChild(visual);
      return box;
    }

    function wpFitOrdinaryMathTypeWordBoxes(renderRoot) {
      if (!(renderRoot instanceof Element)) return;
      const boxes = Array.from(renderRoot.querySelectorAll('.mvip-ordinary-word-mathtype-box'));
      boxes.forEach((box) => {
        if (!(box instanceof HTMLElement)) return;
        const visual = box.querySelector(':scope > .mvip-ordinary-word-mathtype-visual');
        if (!(visual instanceof HTMLElement)) return;
        if (box.classList.contains('is-raster-mathtype')) {
          visual.style.setProperty('transform', 'none', 'important');
          return;
        }

        /* Xóa transform cũ để phép đo luôn dựa trên kích thước tự nhiên. */
        visual.style.setProperty('transform', 'none', 'important');
        visual.style.removeProperty('left');
        visual.style.removeProperty('top');

        const boxWidthPt = Math.max(0, Number(box.dataset.wordWidthPt) || 0);
        const boxHeightPt = Math.max(0, Number(box.dataset.wordHeightPt) || 0);
        const targetWidthPx = boxWidthPt > 0 ? boxWidthPt * 96 / 72 : Math.max(1, box.clientWidth || 0);
        const targetHeightPx = boxHeightPt > 0 ? boxHeightPt * 96 / 72 : Math.max(1, box.clientHeight || 0);
        if (!(targetWidthPx > 0) || !(targetHeightPx > 0)) return;

        /* scrollWidth/scrollHeight lấy cả nội dung SVG/ảnh kể cả khi nét vượt
           khỏi wrapper; bounding box là dự phòng cho chữ toán nội dòng. */
        let naturalWidth = Math.max(0, Number(visual.scrollWidth) || 0);
        let naturalHeight = Math.max(0, Number(visual.scrollHeight) || 0);
        try {
          const rect = visual.getBoundingClientRect();
          naturalWidth = Math.max(naturalWidth, Number(rect.width) || 0);
          naturalHeight = Math.max(naturalHeight, Number(rect.height) || 0);
        } catch (_) {}
        if (!(naturalWidth > 0) || !(naturalHeight > 0)) return;

        /* Chừa khoảng 2% chống lẹm nét ở mép khung. Chỉ thu nhỏ, không phóng
           lớn công thức vốn đã đúng cỡ chữ Word. */
        const scale = Math.min(1, (targetWidthPx * 0.98) / naturalWidth, (targetHeightPx * 0.98) / naturalHeight);
        const safeScale = Math.max(0.12, Math.min(1, Number.isFinite(scale) ? scale : 1));
        visual.style.setProperty('transform', `scale(${Math.round(safeScale * 10000) / 10000})`, 'important');
        visual.dataset.mvipWordFitScale = String(safeScale);
      });
    }

    function wpOrdinaryMathTypeRasterFragment(formula, imageMap) {
      const relId = String(formula && formula.relId || '').trim();
      const image = imageMap && imageMap[relId];
      if (!image) return null;
      const source = String(image.presenterDataUrl || '').trim();
      if (!source || !/^data:image\/(?:png|jpe?g|gif|bmp|webp|svg\+xml);/i.test(source)) return null;

      const img = document.createElement('img');
      img.className = 'mvip-ordinary-word-mathtype-raster';
      img.removeAttribute('data-word-image-zoom');
      img.removeAttribute('data-cv7991-zoom-outline');
      img.style.setProperty('border', '0', 'important');
      img.style.setProperty('outline', '0', 'important');
      img.style.setProperty('box-shadow', 'none', 'important');
      img.src = source;
      img.alt = String(image.presenterTex || image.embeddedTex || '');
      img.setAttribute('draggable', 'false');

      const box = wpOrdinaryMathTypeWordBox(img, formula);
      box.classList.add('is-raster-mathtype');

      /* MathType cũ thường lưu các số đứng độc lập (1, 2, 8, 9...) trong một
         hộp OLE cao gần bằng công thức thông thường. Nếu cho PNG lấp đầy 100%
         hộp này thì chữ số lớn hơn hẳn chữ Word cùng dòng. Nhận riêng công thức
         chỉ gồm số và thu phần nét xuống theo cỡ chữ văn bản, nhưng vẫn giữ
         nguyên kích thước hộp OLE để không làm xô lệch bố cục/tab của Word. */
      let numericOnlyTex = '';
      try {
        const rawNumericTex = String(
          (typeof cv7991ExtractMathTypeMtefTex === 'function' && cv7991ExtractMathTypeMtefTex(image))
          || (typeof cv7991ExtractMathTypeTex === 'function' && cv7991ExtractMathTypeTex(image))
          || image.presenterTex
          || image.embeddedTex
          || ''
        );
        numericOnlyTex = rawNumericTex
          .replace(/\\(?:mathrm|mathbf|mathit|text)\s*\{([^{}]*)\}/g, '$1')
          .replace(/[{}\s]/g, '')
          .trim();
      } catch (_) {}
      const isStandaloneNumber = /^[+-]?(?:\d+(?:[.,]\d+)?|[.,]\d+)$/.test(numericOnlyTex);
      if (isStandaloneNumber) {
        box.classList.add('is-standalone-number-mathtype');
        const digitCount = (numericOnlyTex.match(/\d/g) || []).length;
        const numberScale = digitCount <= 1 ? 0.68 : (digitCount === 2 ? 0.74 : 0.8);
        img.style.setProperty('transform', `scale(${numberScale})`, 'important');
        img.style.setProperty('transform-origin', 'center center', 'important');
        img.dataset.mvipStandaloneNumberScale = String(numberScale);
      }

      const visual = box.querySelector(':scope > .mvip-ordinary-word-mathtype-visual');
      if (visual instanceof HTMLElement) {
        /* Ảnh raster đã được dựng đúng theo dữ liệu MathType. Cho visual chiếm
           chính xác toàn bộ hộp OLE của Word; object-fit:contain giữ tỷ lệ nét. */
        visual.style.setProperty('width', '100%', 'important');
        visual.style.setProperty('height', '100%', 'important');
        visual.style.setProperty('max-width', '100%', 'important');
        visual.style.setProperty('max-height', '100%', 'important');
        visual.style.setProperty('transform', 'none', 'important');
      }
      return box;
    }

    function wpOrdinaryQuestionFormulaFragment(formula, imageMap) {
      const relId = String(formula && formula.relId || '').trim();
      const image = imageMap && imageMap[relId];
      if (!image) return document.createTextNode('');

      /* Trình chiếu tài liệu Word: không dùng ảnh PNG/WMF/EMF của MathType và
         cũng không gò công thức vào hộp OLE cũ. Dùng đúng bộ MathType sống đã
         kiểm tra ở “Trình chiếu câu hỏi Word thành câu hỏi tương tác”. */
      try {
        const live = wpInteractiveQuestionMathTypeFragment(formula, imageMap);
        if (live) {
          if (live instanceof Element) {
            live.classList.add('mvip-ordinary-live-mathtype');
            live.removeAttribute('data-word-image-zoom');
            live.removeAttribute('data-cv7991-zoom-outline');
          }
          return live;
        }
      } catch (_) {}

      /* Dự phòng vẫn là công thức/chữ toán, tuyệt đối không quay về ảnh raster. */
      let rawTex = '';
      try {
        rawTex = String(
          (typeof cv7991ExtractMathTypeTex === 'function' && cv7991ExtractMathTypeTex(image))
          || (typeof cv7991ExtractMathTypeMtefTex === 'function' && cv7991ExtractMathTypeMtefTex(image))
          || image.presenterTex
          || image.embeddedTex
          || ''
        ).trim();
      } catch (_) {}

      const fallback = document.createElement('span');
      fallback.className = 'mvip-interactive-live-mathtype mvip-ordinary-live-mathtype is-tex-fallback';
      fallback.textContent = rawTex
        ? rawTex.replace(/\\(?:textstyle|displaystyle)\b/g, '').replace(/[{}]/g, '').trim()
        : '[Công thức MathType]';
      fallback.setAttribute('aria-label', rawTex || 'Công thức MathType');
      return fallback;
    }


    function wpOrdinaryEquationFontSizePx(equation) {
      const rawXml = String(equation && equation.xml || '').trim();
      if (!rawXml) return 0;
      try {
        const doc = new DOMParser().parseFromString(rawXml, 'application/xml');
        const sizeNode = Array.from(doc.getElementsByTagName('*')).find((node) =>
          String(node && node.localName || '').toLowerCase() === 'sz'
        );
        if (!sizeNode) return 0;
        const sizeAttr = Array.from(sizeNode.attributes || []).find((attr) =>
          String(attr && (attr.localName || attr.name) || '').toLowerCase() === 'val'
        );
        const halfPoints = Number(sizeAttr && sizeAttr.value);
        if (!(halfPoints > 0)) return 0;
        return Math.max(8, Math.min(128, halfPoints * 2 / 3));
      } catch (_) {
        return 0;
      }
    }

    function wpOrdinaryEquationFragment(equationItem) {
      const template = document.createElement('template');
      const sourceEquation = equationItem && equationItem.equation || {};
      const equationHtml = cv7991PresenterEquationHtml(Object.assign({}, sourceEquation, {
        mvipMathStyle: equationItem && equationItem.isBlock ? 'display' : 'text',
      }));
      const blockClass = equationItem && equationItem.isBlock ? ' is-block' : '';
      const fontSizePx = wpOrdinaryEquationFontSizePx(sourceEquation);
      const fontSizeStyle = fontSizePx ? ` style="font-size:${Math.round(fontSizePx * 1000) / 1000}px"` : '';
      template.innerHTML = `<span class="mvip-ordinary-omml-equation${blockClass}"${fontSizeStyle}>${String(equationHtml || '')}</span>`;
      return template.content.cloneNode(true);
    }

    function wpOrdinaryEquationPresentationFragment(equation) {
      const item = equation && typeof equation === 'object' ? equation : {};
      const template = document.createElement('template');
      const equationHtml = cv7991PresenterEquationHtml(Object.assign({}, item, {
        mvipMathStyle: item.isBlock ? 'display' : 'text',
      }));
      const blockClass = item.isBlock ? ' is-block' : '';
      const equationFontPx = wpOrdinaryEquationFontSizePx(item);
      const sourceCharacterPt = Math.max(6, Number(item.sourceCharacterHeightPt) || 12);
      const sourceCharacterPx = sourceCharacterPt * 96 / 72;
      const sourceScale = equationFontPx > 0
        ? Math.max(0.5, Math.min(4, equationFontPx / Math.max(1, sourceCharacterPx)))
        : 1;
      const roundedScale = Math.round(sourceScale * 10000) / 10000;
      template.innerHTML = `<span class="mvip-ordinary-omml-equation mvip-ordinary-shared-equation${blockClass}" style="--mvip-ordinary-equation-font-size:${roundedScale}em">${String(equationHtml || '')}</span>`;
      return template.content.cloneNode(true);
    }

    async function wpWaitForOrdinaryFormulaImages(renderRoot) {
      if (!(renderRoot instanceof Element)) return;
      const images = Array.from(renderRoot.querySelectorAll('img.single-exam-inline-formula'));
      await Promise.all(images.map((image) => {
        if (image.complete && image.naturalWidth > 0) return Promise.resolve();
        if (typeof image.decode === 'function') return image.decode().catch(() => {});
        return new Promise((resolve) => {
          let settled = false;
          const finish = () => {
            if (settled) return;
            settled = true;
            resolve();
          };
          image.addEventListener('load', finish, { once: true });
          image.addEventListener('error', finish, { once: true });
          setTimeout(finish, 1800);
        });
      }));
    }

    function wpOrdinaryTabContentWidth(tabElement, nextTabElement, paragraph, horizontalScale = 1) {
      if (!(tabElement instanceof Element) || !(paragraph instanceof Element)) return 0;
      try {
        const range = document.createRange();
        range.setStartAfter(tabElement);
        if (nextTabElement instanceof Element) range.setEndBefore(nextTabElement);
        else range.setEnd(paragraph, paragraph.childNodes.length);
        const scale = Math.max(0.05, Math.min(20, Number(horizontalScale) || 1));
        return Math.max(0, (Number(range.getBoundingClientRect().width) || 0) / scale);
      } catch (_) {
        return 0;
      }
    }

    function wpApplyOrdinaryDocxTabStops(renderRoot, tabParagraphs, defaultTabTwips) {
      if (!(renderRoot instanceof Element) || !Array.isArray(tabParagraphs) || !tabParagraphs.length) return;
      const markerMap = new Map(tabParagraphs.map((item) => [String(item.marker || ''), item]));
      const markerPattern = /CV7991ORDTAB\d+TOKEN/g;
      const markedTextNodes = [];
      const walker = document.createTreeWalker(renderRoot, NodeFilter.SHOW_TEXT);
      while (walker.nextNode()) {
        const textNode = walker.currentNode;
        if (textNode && /CV7991ORDTAB\d+TOKEN/.test(String(textNode.nodeValue || ''))) {
          markedTextNodes.push(textNode);
        }
      }

      const defaultStep = Math.max(1, Number(defaultTabTwips) || 720);
      markedTextNodes.forEach((textNode) => {
        const source = String(textNode.nodeValue || '');
        markerPattern.lastIndex = 0;
        const match = markerPattern.exec(source);
        if (!match) return;
        const paragraphInfo = markerMap.get(match[0]);
        const paragraph = textNode.parentElement && textNode.parentElement.closest('p');
        textNode.nodeValue = source.replace(match[0], '');
        if (!paragraphInfo || !(paragraph instanceof HTMLElement)) return;

        const tabElements = Array.from(paragraph.querySelectorAll('.docx-tab-stop'))
          .slice(0, Math.max(0, Number(paragraphInfo.tabCount) || 0));
        if (!tabElements.length) return;
        paragraph.classList.add('mvip-ordinary-word-tabs');

        /* Xóa kết quả ước lượng của docx-preview rồi đặt mỗi Tab thành một hộp
           nội tuyến có bề rộng đúng tới mốc Word kế tiếp. 1 CSS px = 15 twip
           tại kích thước trang gốc 96 dpi. */
        tabElements.forEach((tabElement) => {
          tabElement.textContent = '';
          tabElement.style.setProperty('display', 'inline-block', 'important');
          tabElement.style.setProperty('width', '0px', 'important');
          tabElement.style.setProperty('min-width', '0px', 'important');
          tabElement.style.setProperty('height', '1px', 'important');
          tabElement.style.setProperty('padding', '0', 'important');
          tabElement.style.setProperty('margin', '0', 'important');
          tabElement.style.setProperty('border', '0', 'important');
          tabElement.style.setProperty('word-spacing', '0', 'important');
          tabElement.style.setProperty('font-size', '0', 'important');
          tabElement.style.setProperty('line-height', '0', 'important');
          tabElement.style.setProperty('vertical-align', 'baseline', 'important');
          tabElement.style.setProperty('white-space', 'nowrap', 'important');
        });

        /* getBoundingClientRect() đã bao gồm transform của lớp fit trang, còn
           các mốc Word và width CSS đều ở hệ tọa độ trang gốc. Quy đổi mọi
           phép đo về CSS px nội tại trước khi tính chiều rộng Tab; nếu không,
           khi trang đang được fit/phóng thì currentPx lớn gấp hệ số transform
           và các Tab sau A/B/C bị co gần về 0. */
        const paragraphRect = paragraph.getBoundingClientRect();
        const intrinsicParagraphWidth = Math.max(1,
          Number(paragraph.offsetWidth) || Number(paragraphRect.width) || 1
        );
        const paragraphScaleX = Math.max(0.05, Math.min(20,
          (Number(paragraphRect.width) || intrinsicParagraphWidth) / intrinsicParagraphWidth
        ));
        const paragraphLeft = paragraphRect.left;
        const explicitStops = Array.isArray(paragraphInfo.stops)
          ? paragraphInfo.stops.filter((stop) => String(stop && stop.style || '').toLowerCase() !== 'clear')
          : [];
        const lastExplicit = explicitStops.length
          ? Math.max(...explicitStops.map((stop) => Number(stop.positionTwips) || 0))
          : 0;

        /* Đo trước phần nội dung nằm giữa từng cặp Tab khi tất cả Tab đang có
           bề rộng 0. Sau đó dùng một con trỏ logic chạy tuần tự. Nếu dựa lại
           getBoundingClientRect() ở từng lượt, nhiều Tab liên tiếp trong các
           run khác nhau có thể cùng báo một tọa độ và bị chồng thành một Tab. */
        const contentWidthsAfterTabs = tabElements.map((tabElement, index) =>
          wpOrdinaryTabContentWidth(
            tabElement,
            tabElements[index + 1] || null,
            paragraph,
            paragraphScaleX
          )
        );
        let logicalCursorPx = Math.max(0,
          (tabElements[0].getBoundingClientRect().left - paragraphLeft) / paragraphScaleX
        );

        tabElements.forEach((tabElement, index) => {
          const currentPx = logicalCursorPx;
          const currentTwips = currentPx * 15;
          let targetStop = explicitStops.find((stop) => Number(stop.positionTwips) > currentTwips + 1);
          if (!targetStop) {
            const base = explicitStops.length ? lastExplicit : 0;
            const stepsAfterBase = Math.max(1, Math.floor((currentTwips - base) / defaultStep) + 1);
            targetStop = { positionTwips: base + stepsAfterBase * defaultStep, style: 'left', leader: 'none' };
          }
          const followingWidth = Math.max(0, Number(contentWidthsAfterTabs[index]) || 0);
          const targetPx = Math.max(0, Number(targetStop.positionTwips) || 0) / 15;
          const stopStyle = String(targetStop.style || 'left').toLowerCase();
          const alignmentOffset = stopStyle === 'right'
            ? followingWidth
            : (stopStyle === 'center' ? followingWidth / 2 : 0);
          const widthPx = Math.max(0, targetPx - currentPx - alignmentOffset);
          tabElement.style.setProperty('width', `${Math.round(widthPx * 100) / 100}px`, 'important');
          const contentStartPx = currentPx + widthPx;
          logicalCursorPx = contentStartPx + followingWidth;
          if (/^(?:dot|middledot)$/i.test(String(targetStop.leader || ''))) {
            tabElement.style.setProperty('border-bottom', '1px dotted currentColor', 'important');
          } else if (/^(?:hyphen|heavy|underscore)$/i.test(String(targetStop.leader || ''))) {
            tabElement.style.setProperty('border-bottom', '1px solid currentColor', 'important');
          }
        });
      });
    }

    function wpMeasureOrdinaryDocxNormalLineFactor(paragraph, cache) {
      if (!(paragraph instanceof HTMLElement)) return 1.15;
      let fontSource = paragraph;
      try {
        const textRuns = Array.from(paragraph.querySelectorAll('span'));
        fontSource = textRuns.find((run) => {
          if (!(run instanceof HTMLElement) || !String(run.textContent || '').trim()) return false;
          const style = window.getComputedStyle(run);
          return style.display !== 'none' && style.visibility !== 'hidden';
        }) || paragraph;
      } catch (_) {}

      let computed;
      try {
        computed = window.getComputedStyle(fontSource);
      } catch (_) {
        return 1.15;
      }
      const fontSizePx = parseFloat(String(computed.fontSize || '')) || 0;
      if (!(fontSizePx > 0)) return 1.15;
      const cacheKey = [
        computed.fontFamily,
        computed.fontSize,
        computed.fontWeight,
        computed.fontStyle,
        computed.fontStretch,
        computed.letterSpacing
      ].join('|');
      if (cache instanceof Map && cache.has(cacheKey)) return cache.get(cacheKey);

      const probe = document.createElement('span');
      probe.textContent = 'Hg';
      probe.setAttribute('aria-hidden', 'true');
      probe.style.position = 'absolute';
      probe.style.left = '-100000px';
      probe.style.top = '0';
      probe.style.display = 'inline-block';
      probe.style.visibility = 'hidden';
      probe.style.whiteSpace = 'nowrap';
      probe.style.margin = '0';
      probe.style.padding = '0';
      probe.style.border = '0';
      probe.style.lineHeight = 'normal';
      probe.style.fontFamily = computed.fontFamily;
      probe.style.fontSize = computed.fontSize;
      probe.style.fontWeight = computed.fontWeight;
      probe.style.fontStyle = computed.fontStyle;
      probe.style.fontStretch = computed.fontStretch || 'normal';
      probe.style.letterSpacing = computed.letterSpacing;
      (document.body || document.documentElement).appendChild(probe);
      const normalLinePx = Number(probe.getBoundingClientRect().height) || 0;
      probe.remove();

      /* Word tính w:lineRule="auto" theo bội số của chiều cao dòng đơn
         (có leading của phông), không phải chỉ theo font-size. */
      const factor = Math.max(.75, Math.min(2,
        normalLinePx > 0 ? normalLinePx / fontSizePx : 1.15
      ));
      if (cache instanceof Map) cache.set(cacheKey, factor);
      return factor;
    }

    function wpApplyOrdinaryDocxParagraphLayouts(renderRoot, paragraphLayouts) {
      if (!(renderRoot instanceof Element)
          || !Array.isArray(paragraphLayouts) || !paragraphLayouts.length) return;
      const normalLineFactorCache = new Map();
      const tokenTextNodes = new Map();
      const tokenWalker = document.createTreeWalker(renderRoot, NodeFilter.SHOW_TEXT);
      const tokenPattern = /CV7991ORDPARA\d+TOKEN/g;
      while (tokenWalker.nextNode()) {
        const textNode = tokenWalker.currentNode;
        const value = String(textNode && textNode.nodeValue || '');
        tokenPattern.lastIndex = 0;
        let match;
        while ((match = tokenPattern.exec(value))) tokenTextNodes.set(match[0], textNode);
      }
      paragraphLayouts.forEach((layoutInfo) => {
        const marker = String(layoutInfo && layoutInfo.marker || '').trim();
        if (!marker) return;
        const markerElement = layoutInfo.tokenMarker
          ? null : renderRoot.querySelector(`#${marker}`);
        const markerTextNode = layoutInfo.tokenMarker
          ? tokenTextNodes.get(marker) : null;
        const paragraph = markerTextNode && markerTextNode.parentElement
          ? markerTextNode.parentElement.closest('p')
          : (markerElement && markerElement.closest('p'));
        const removeMarker = () => {
          if (markerTextNode && markerTextNode.parentNode) {
            const remaining = String(markerTextNode.nodeValue || '').split(marker).join('');
            if (remaining) markerTextNode.nodeValue = remaining;
            else markerTextNode.parentNode.removeChild(markerTextNode);
          }
          if (markerElement && markerElement.parentNode) markerElement.remove();
        };
        if (!(paragraph instanceof HTMLElement)) {
          removeMarker();
          return;
        }
        const lineValue = Number(layoutInfo.line) || 0;
        const lineRule = String(layoutInfo.lineRule || 'auto').toLowerCase();
        if (layoutInfo.emptyLine && layoutInfo.emptyLineTypography) {
          const typography = layoutInfo.emptyLineTypography;
          if (Number(typography.fontSizePt) > 0) {
            paragraph.style.setProperty('font-size', `${Number(typography.fontSizePt) * 4 / 3}px`, 'important');
          }
          if (typography.fontFamily) {
            paragraph.style.setProperty('font-family', String(typography.fontFamily), 'important');
          }
        }
        if (lineValue > 0) {
          if (lineRule === 'auto') {
            /* w:line dùng phần 240 của chiều cao dòng normal. Dùng unitless
               để các run khác cỡ chữ vẫn tăng/giảm theo đúng tỉ lệ. */
            const normalLineFactor = wpMeasureOrdinaryDocxNormalLineFactor(
              paragraph,
              normalLineFactorCache
            );
            paragraph.style.setProperty(
              'line-height',
              String(Math.max(.2, normalLineFactor * lineValue / 240)),
              'important'
            );
          } else if (/^(?:exact|exactly)$/.test(lineRule)) {
            paragraph.style.setProperty('line-height', `${lineValue / 20}pt`, 'important');
          } else {
            /* atLeast: giữ chiều cao hiện tại nếu font/công thức cần lớn hơn. */
            let currentLinePx = 0;
            try {
              const computed = window.getComputedStyle(paragraph);
              currentLinePx = parseFloat(String(computed.lineHeight || '')) || 0;
            } catch (_) {}
            paragraph.style.setProperty(
              'line-height',
              `${Math.max(currentLinePx, lineValue / 15)}px`,
              'important'
            );
          }
        }
        let measuredLinePx = 0;
        try {
          measuredLinePx = parseFloat(String(
            window.getComputedStyle(paragraph).lineHeight || ''
          )) || 0;
        } catch (_) {}
        if (layoutInfo.emptyLine && measuredLinePx > 0) {
          /* p rỗng của HTML không tự sinh line box. min-height khôi phục đúng
             một dòng Word nhưng vẫn cho ảnh inline/công thức cao hơn mở rộng. */
          paragraph.style.setProperty('min-height', `${measuredLinePx}px`, 'important');
        }
        const beforeLines = layoutInfo.beforeLines == null
          ? Number.NaN : Number(layoutInfo.beforeLines);
        const afterLines = layoutInfo.afterLines == null
          ? Number.NaN : Number(layoutInfo.afterLines);
        const before = layoutInfo.before == null
          ? Number.NaN : Number(layoutInfo.before);
        const after = layoutInfo.after == null
          ? Number.NaN : Number(layoutInfo.after);
        if (!layoutInfo.beforeAuto) {
          if (Number.isFinite(beforeLines) && beforeLines >= 0 && measuredLinePx > 0) {
            paragraph.style.setProperty(
              'margin-top', `${measuredLinePx * beforeLines / 100}px`, 'important'
            );
          } else if (Number.isFinite(before) && before >= 0) {
            paragraph.style.setProperty('margin-top', `${before / 20}pt`, 'important');
          }
        }
        if (!layoutInfo.afterAuto) {
          if (Number.isFinite(afterLines) && afterLines >= 0 && measuredLinePx > 0) {
            paragraph.style.setProperty(
              'margin-bottom', `${measuredLinePx * afterLines / 100}px`, 'important'
            );
          } else if (Number.isFinite(after) && after >= 0) {
            paragraph.style.setProperty('margin-bottom', `${after / 20}pt`, 'important');
          }
        }
        removeMarker();
      });
    }

    function wpApplyOrdinaryDocxTableLayouts(renderRoot, tableLayouts) {
      if (!(renderRoot instanceof Element) || !Array.isArray(tableLayouts) || !tableLayouts.length) return;
      tableLayouts.forEach((layoutInfo) => {
        const marker = String(layoutInfo && layoutInfo.marker || '').trim();
        if (!marker) return;
        const markerElement = renderRoot.querySelector(`#${marker}`);
        const table = markerElement && markerElement.closest('table');
        if (!(table instanceof HTMLTableElement)) {
          if (markerElement) markerElement.remove();
          return;
        }
        markerElement.remove();
        const columns = Array.isArray(layoutInfo.columnsTwips)
          ? layoutInfo.columnsTwips.map(Number).filter((value) => Number.isFinite(value) && value > 0)
          : [];
        const gridTotal = columns.reduce((sum, value) => sum + value, 0);
        const widthValue = Number(layoutInfo.widthValue) || 0;
        const widthType = String(layoutInfo.widthType || 'auto').toLowerCase();

        table.classList.add('mvip-ordinary-word-sized-table');
        table.style.setProperty('min-width', '0', 'important');
        table.style.setProperty('max-width', 'none', 'important');
        table.style.setProperty('box-sizing', 'border-box', 'important');
        const floatingFlow = layoutInfo && typeof layoutInfo.floatingFlow === 'object'
          ? layoutInfo.floatingFlow : null;
        if (floatingFlow) {
          table.classList.add('mvip-ordinary-word-wide-floating-table');
          table.style.setProperty('position', 'static', 'important');
          table.style.setProperty('float', 'none', 'important');
          table.style.setProperty('clear', 'both', 'important');
          if (floatingFlow.centered) {
            table.style.setProperty('margin-left', 'auto', 'important');
            table.style.setProperty('margin-right', 'auto', 'important');
          }
          const topTwips = Math.max(0, Number(floatingFlow.topTwips) || 0);
          table.style.setProperty(
            'margin-top', `${Math.round((topTwips / 20) * 1000) / 1000}pt`, 'important'
          );
        }
        if (widthValue > 0 && widthType === 'pct') {
          table.style.setProperty('width', `${Math.round(widthValue * 2) / 100}%`, 'important');
        } else if (widthValue > 0 && widthType === 'dxa') {
          table.style.setProperty('width', `${Math.round(widthValue * 5) / 100}pt`, 'important');
        }

        const colGroup = Array.from(table.children || []).find((child) =>
          String(child && child.localName || '').toLowerCase() === 'colgroup'
        );
        const colElements = Array.from(colGroup && colGroup.children || []).filter((child) =>
          String(child && child.localName || '').toLowerCase() === 'col'
        );
        const hasExplicitTableWidth = widthValue > 0 && (widthType === 'pct' || widthType === 'dxa');
        if (!hasExplicitTableWidth && gridTotal > 0) {
          table.style.setProperty('width', `${Math.round(gridTotal * 5) / 100}pt`, 'important');
        }
        if (gridTotal > 0 && colElements.length === columns.length) {
          /* tblGrid là lưới cột cuối cùng Word đã tính và lưu theo twip.
             Không giao lại cho HTML Auto Layout: các ô gridSpan ở dòng tổng
             sẽ dồn độ rộng vào cột đầu (TT) và bóp cột Đơn vị kiến thức.
             Khóa cả bảng và từng col theo tblGrid vẫn giữ việc bọc chữ tự
             nhiên trong ô, nhưng không cho ô gộp phân phối lại lưới nguồn. */
          const gridWidthPt = Math.round(gridTotal * 5) / 100;
          table.style.setProperty('table-layout', 'fixed', 'important');
          table.style.setProperty('width', `${gridWidthPt}pt`, 'important');
          table.style.setProperty('min-width', `${gridWidthPt}pt`, 'important');
          table.style.setProperty('max-width', `${gridWidthPt}pt`, 'important');
          colElements.forEach((column, index) => {
            const sourceWidth = `${Math.round(columns[index] * 5) / 100}pt`;
            column.style.setProperty('width', sourceWidth, 'important');
            column.style.setProperty('min-width', sourceWidth, 'important');
            column.style.setProperty('max-width', sourceWidth, 'important');
          });
        }
        const tableCellMargins = layoutInfo && typeof layoutInfo.tableCellMargins === 'object'
          ? layoutInfo.tableCellMargins : null;
        const cellMargins = Array.isArray(layoutInfo.cellMargins) ? layoutInfo.cellMargins : [];
        const wordCellMarginCss = (margin) => {
          if (!margin || typeof margin !== 'object') return '';
          const value = Number(margin.value);
          const type = String(margin.type || 'dxa').toLowerCase();
          if (/^(?:nil|none)$/.test(type)) return '0pt';
          if (!Number.isFinite(value)) return '';
          if (type === 'pct') return `${Math.round(value * 2) / 100}%`;
          return `${Math.round((value / 20) * 1000) / 1000}pt`;
        };
        /* w:vMerge làm docx-preview bỏ các ô tiếp nối khỏi DOM. Vì vậy
           cellIndex của HTML không còn luôn trùng với thứ tự w:tc trong XML;
           nếu chỉ gán tblCellMar qua ma trận row/cell, lề mặc định có thể
           rơi sang ô khác và ô thật vẫn giữ 5.4pt của Table Normal. Áp lề
           cấp bảng cho toàn bộ ô trước (đây là đúng phạm vi của tblCellMar),
           rồi mới chồng tcMar riêng ở nhánh dưới. */
        if (tableCellMargins) {
          Array.from(table.rows || []).forEach((row) => {
            Array.from(row.cells || []).forEach((cell) => {
              ['top', 'right', 'bottom', 'left'].forEach((side) => {
                const cssValue = wordCellMarginCss(tableCellMargins[side]);
                if (cssValue) cell.style.setProperty(`padding-${side}`, cssValue, 'important');
              });
            });
          });
        }
        Array.from(table.rows || []).forEach((row, rowIndex) => {
          const sourceRowMargins = Array.isArray(cellMargins[rowIndex]) ? cellMargins[rowIndex] : [];
          Array.from(row.cells || []).forEach((cell, cellIndex) => {
            const margins = sourceRowMargins[cellIndex];
            if (!margins || typeof margins !== 'object') return;
            ['top', 'right', 'bottom', 'left'].forEach((side) => {
              const cssValue = wordCellMarginCss(margins[side]);
              if (cssValue) cell.style.setProperty(`padding-${side}`, cssValue, 'important');
            });
          });
        });
        const typography = layoutInfo && typeof layoutInfo.typography === 'object'
          ? layoutInfo.typography : {};
        const tableFontSizePt = Math.max(0, Number(typography.fontSizePt) || 0);
        const tableFontFamily = String(typography.fontFamily || '')
          .replace(/["'\\]/g, '').trim();
        if (tableFontSizePt > 0 || tableFontFamily) {
          table.classList.add('mvip-ordinary-word-table-typography');
          if (tableFontSizePt > 0) {
            table.style.setProperty('font-size', `${Math.round(tableFontSizePt * 1000) / 1000}pt`, 'important');
          }
          if (tableFontFamily) {
            table.style.setProperty('font-family', `"${tableFontFamily}"`, 'important');
          }
          Array.from(table.rows || []).forEach((row) => {
            Array.from(row.cells || []).forEach((cell) => {
              if (tableFontSizePt > 0) {
                cell.style.setProperty('font-size', `${Math.round(tableFontSizePt * 1000) / 1000}pt`, 'important');
              }
              if (tableFontFamily) {
                cell.style.setProperty('font-family', `"${tableFontFamily}"`, 'important');
              }
              Array.from(cell.children || []).forEach((paragraph) => {
                if (String(paragraph && paragraph.localName || '').toLowerCase() !== 'p') return;
                /* pPr có cỡ/font trực tiếp phải được giữ; chỉ ép inherit khi
                   paragraph đang nhận style Normal qua class CSS. */
                if (tableFontSizePt > 0 && !paragraph.style.getPropertyValue('font-size')) {
                  paragraph.classList.add('mvip-ordinary-word-table-font-size');
                }
                if (tableFontFamily && !paragraph.style.getPropertyValue('font-family')) {
                  paragraph.classList.add('mvip-ordinary-word-table-font-family');
                }
              });
            });
          });
        }
        /* Hiệu chỉnh phép đo bề rộng run của trình duyệt về gần Word. Không
           đặt ở table/p để tránh ghi đè w:spacing mà docx-preview đã chuyển
           thành letter-spacing nội tuyến trên từng span. */
        Array.from(table.querySelectorAll('span')).forEach((runElement) => {
          if (!(runElement instanceof HTMLElement)) return;
          if (runElement.style.getPropertyValue('letter-spacing')) return;
          if (runElement.closest('svg, math, .mvip-ordinary-inline-formula-object')) return;
          runElement.classList.add('mvip-ordinary-word-compatible-advance');
        });
        const rowHeights = Array.isArray(layoutInfo.rowHeights) ? layoutInfo.rowHeights : [];
        const rows = Array.from(table.rows || []);
        rows.forEach((row, index) => {
          const geometry = rowHeights[index] || {};
          const twips = Math.max(0, Number(geometry.twips) || 0);
          if (!(twips > 0)) return;
          const heightPt = Math.round((twips / 20) * 1000) / 1000;
          row.style.setProperty(geometry.exact ? 'height' : 'min-height', `${heightPt}pt`, 'important');
          Array.from(row.cells || []).forEach((cell) => {
            if (geometry.exact) {
              cell.style.setProperty('height', `${heightPt}pt`, 'important');
              cell.style.setProperty('max-height', `${heightPt}pt`, 'important');
              cell.style.setProperty('overflow', 'hidden', 'important');
            } else {
              cell.style.removeProperty('height');
              cell.style.removeProperty('max-height');
            }
          });
        });
      });
    }

    function wpApplyOrdinaryMathTypeWordSizing(renderRoot) {
      if (!(renderRoot instanceof Element)) return;
      const formulas = Array.from(renderRoot.querySelectorAll('.single-exam-inline-formula'));
      formulas.forEach((element) => {
        if (!(element instanceof HTMLElement)) return;
        const baseWidth = Math.max(2,
          parseFloat(element.style.getPropertyValue('--cv-formula-base-width'))
            || parseFloat(element.style.width)
            || 18
        );
        const baseHeight = Math.max(2,
          parseFloat(element.style.getPropertyValue('--cv-formula-base-height'))
            || parseFloat(element.style.height)
            || 12
        );
        const singleLine = (parseFloat(element.style.getPropertyValue('--cv-formula-single-line')) || 0) >= 1;
        const lineCount = Math.max(1, Math.min(8,
          parseFloat(element.style.getPropertyValue('--cv-formula-line-count')) || (singleLine ? 1 : 2)
        ));
        const simpleSymbol = (parseFloat(element.style.getPropertyValue('--mvip-ordinary-mathtype-simple-symbol')) || 0) >= 1;
        const accentedFormula = (parseFloat(element.style.getPropertyValue('--mvip-ordinary-mathtype-accented')) || 0) >= 1;
        let localFontSize = 16;
        try {
          localFontSize = Math.max(8,
            parseFloat(getComputedStyle(element.parentElement || element).fontSize) || localFontSize
          );
        } catch (_) {}

        /* Một bộ tính thuần dùng chung cho màn trình chiếu và file Word xuất ra.
           Nhờ vậy cùng một MTEF cho cùng chiều rộng, chiều cao và baseline. */
        const inkMetrics = wpFormulaInkMetrics(element) || {};
        const sharedGeometry = window.cv7991OrdinaryMathTypeGeometryFromMetrics({
          baseWidthPx: baseWidth,
          baseHeightPx: baseHeight,
          fontSizePx: localFontSize,
          singleLine,
          lineCount,
          simpleSymbol,
          accentedFormula,
          baselineRatio: cv7991MathTypeElementBaselineRatio(element),
          intrinsicRatio: cv7991MathTypeElementIntrinsicRatio(element),
          bottomPaddingRatio: Number(inkMetrics.bottomPaddingRatio) || 0.08,
          textInkDescentPx: cv7991MeasureInlineTextInkDescent(element, localFontSize),
          wordPositionHalfPoints: 0,
        });
        const displayWidth = sharedGeometry.widthPx;
        const displayHeight = sharedGeometry.heightPx;
        element.style.setProperty('width', `${Math.round(displayWidth * 100) / 100}px`, 'important');
        element.style.setProperty('height', `${Math.round(displayHeight * 100) / 100}px`, 'important');
        element.style.setProperty('max-width', 'none', 'important');
        element.style.setProperty('max-height', 'none', 'important');
        element.style.setProperty('object-fit', 'contain', 'important');
        element.style.setProperty('object-position', 'center center', 'important');
        element.style.setProperty('display', 'inline-block', 'important');
        element.style.setProperty('margin-top', '0px', 'important');
        element.style.setProperty('margin-bottom', '0px', 'important');
        /* Khoảng cách với chữ thường đã nằm trong chính các dấu cách của Word.
           Không cộng thêm lề .12em của giao diện trình chiếu câu hỏi, vì ảnh
           MathType ở đây đã được cắt sát riêng theo biên nét trái/phải. */
        element.style.setProperty('margin-left', '0px', 'important');
        element.style.setProperty('margin-right', '0px', 'important');

        if (singleLine) {
          const drop = sharedGeometry.dropPx;
          element.classList.add('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'baseline', 'important');
          element.style.setProperty('transform-origin', 'center bottom', 'important');
          element.style.setProperty('transform', `translateY(${Math.round(drop * 100) / 100}px)`, 'important');
        } else {
          /* Phân số/căn nhiều tầng tự mở rộng line-box như một đối tượng inline
             của Word. Không chèn lề âm và không nén dòng của chế độ câu hỏi. */
          element.classList.remove('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'middle', 'important');
          element.style.setProperty('transform-origin', 'center center', 'important');
          element.style.setProperty('transform', 'translateY(0px)', 'important');
        }
      });
    }

    /* Các bộ dựng được dùng chung có chủ đích: MathType của câu hỏi tương tác
       và MathType của Trình chiếu tài liệu Word đều dựng trực tiếp từ MTEF/TeX,
       không tạo ảnh trung gian. */
    window.cv7991OrdinaryMathTypeFragmentForPresentation = wpOrdinaryQuestionFormulaFragment;
    window.cv7991InteractiveMathTypeFragmentForPresentation = wpInteractiveQuestionMathTypeFragment;
    window.cv7991ApplyOrdinaryMathTypeWordSizing = wpApplyOrdinaryMathTypeWordSizing;
    window.cv7991FitOrdinaryMathTypeWordBoxes = wpFitOrdinaryMathTypeWordBoxes;
    window.cv7991OrdinaryEquationFragmentForPresentation = wpOrdinaryEquationPresentationFragment;

    async function wpHydrateOrdinaryDocxMath(renderRoot, formulas, equations, imageMap) {
      if (!(renderRoot instanceof HTMLElement)) return;
      const legacyFormulas = Array.isArray(formulas) ? formulas : [];
      const ommlEquations = Array.isArray(equations) ? equations : [];
      if (!legacyFormulas.length && !ommlEquations.length) return;
      const formulaByMarker = new Map(legacyFormulas.map((formula) => [String(formula.marker || ''), formula]));
      const equationByMarker = new Map(ommlEquations.map((item) => [String(item.marker || ''), item]));
      const markerPattern = /CV7991ORDMATH\d+TOKEN|CV7991ORDOMML\d+TOKEN/g;
      const textNodes = [];
      const walker = document.createTreeWalker(renderRoot, NodeFilter.SHOW_TEXT);
      while (walker.nextNode()) {
        const current = walker.currentNode;
        if (current && /CV7991ORD(?:MATH|OMML)\d+TOKEN/.test(String(current.nodeValue || ''))) textNodes.push(current);
      }
      if (!textNodes.length) return;

      textNodes.forEach((textNode) => {
        const source = String(textNode.nodeValue || '');
        markerPattern.lastIndex = 0;
        let match;
        let cursor = 0;
        const fragment = document.createDocumentFragment();
        while ((match = markerPattern.exec(source))) {
          if (match.index > cursor) fragment.appendChild(document.createTextNode(source.slice(cursor, match.index)));
          const formula = formulaByMarker.get(match[0]);
          const equationItem = equationByMarker.get(match[0]);
          fragment.appendChild(formula
            ? wpOrdinaryQuestionFormulaFragment(formula, imageMap)
            : (equationItem
              ? wpOrdinaryEquationFragment(equationItem)
              : document.createTextNode(match[0])));
          cursor = match.index + match[0].length;
        }
        if (cursor < source.length) fragment.appendChild(document.createTextNode(source.slice(cursor)));
        if (cursor > 0 && textNode.parentNode) textNode.parentNode.replaceChild(fragment, textNode);
      });
      /* MathType giờ là công thức sống, không còn ảnh nên không đợi ảnh,
         không áp kích thước hộp OLE và không fit/co/giãn. Chỉ nhường hai frame
         để MathJax hoàn tất baseline/kích thước tự nhiên trước khi đo trang. */
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      setTimeout(() => {
        try {
          renderRoot.querySelectorAll('.mvip-ordinary-live-mathtype').forEach((node) => {
            if (!(node instanceof HTMLElement)) return;
            node.style.removeProperty('width');
            node.style.removeProperty('height');
            node.style.removeProperty('max-width');
            node.style.removeProperty('max-height');
            node.style.removeProperty('transform');
            node.style.removeProperty('top');
            node.style.removeProperty('left');
          });
        } catch (_) {}
      }, 60);
    }


    function wpTextBoxLocalName(node) {
      return String(node && (node.localName || node.nodeName) || '').split(':').pop().toLowerCase();
    }
    function wpTextBoxDirectChildren(node, name = '') {
      const wanted = String(name || '').toLowerCase();
      return Array.from(node && node.childNodes || []).filter((child) =>
        child && child.nodeType === Node.ELEMENT_NODE
        && (!wanted || wpTextBoxLocalName(child) === wanted)
      );
    }
    function wpTextBoxAttr(node, name) {
      const wanted = String(name || '').toLowerCase();
      const attr = Array.from(node && node.attributes || []).find((item) =>
        String(item && (item.localName || item.name) || '').split(':').pop().toLowerCase() === wanted
      );
      return String(attr && attr.value || '');
    }
    function wpTextBoxFirstDesc(node, name) {
      const wanted = String(name || '').toLowerCase();
      return Array.from(node && node.getElementsByTagName ? node.getElementsByTagName('*') : [])
        .find((item) => wpTextBoxLocalName(item) === wanted) || null;
    }
    function wpTextBoxBorder(borderNode) {
      if (!borderNode) return undefined;
      const val = wpTextBoxAttr(borderNode, 'val').toLowerCase();
      if (!val || val === 'nil' || val === 'none') return { style:'none', widthPx:0, color:'transparent' };
      const sz = Math.max(0, Number(wpTextBoxAttr(borderNode, 'sz')) || 0);
      const rawColor = wpTextBoxAttr(borderNode, 'color');
      const color = /^[0-9a-f]{6}$/i.test(rawColor) ? `#${rawColor}` : '#000000';
      const style = /double/i.test(val) ? 'double' : (/dash/i.test(val) ? 'dashed' : (/dot/i.test(val) ? 'dotted' : 'solid'));
      return { style, widthPx: Math.max(.67, sz / 6), color };
    }
    function wpTextBoxRunStyle(rPr) {
      if (!rPr) return {};
      const style = {};
      if (wpTextBoxDirectChildren(rPr, 'b').length) style.bold = true;
      if (wpTextBoxDirectChildren(rPr, 'i').length) style.italic = true;
      if (wpTextBoxDirectChildren(rPr, 'u').length) style.underline = true;
      const sz = wpTextBoxDirectChildren(rPr, 'sz')[0];
      const halfPt = Number(wpTextBoxAttr(sz, 'val')) || 0;
      if (halfPt > 0) style.fontSizePt = halfPt / 2;
      return style;
    }
    function wpTextBoxParagraphRuns(pNode, imageMap) {
      const runs = [];
      const walk = (node, inheritedStyle = {}) => {
        if (!node) return;
        if (node.nodeType === Node.TEXT_NODE) {
          const value = String(node.nodeValue || '');
          if (value) runs.push({ text:value, style:Object.assign({}, inheritedStyle), script:'' });
          return;
        }
        if (node.nodeType !== Node.ELEMENT_NODE) return;
        const local = wpTextBoxLocalName(node);

        if (local === 'r') {
          const rPr = wpTextBoxDirectChildren(node, 'rpr')[0] || null;
          const style = Object.assign({}, inheritedStyle, wpTextBoxRunStyle(rPr));
          wpTextBoxDirectChildren(node).forEach((child) => {
            if (wpTextBoxLocalName(child) !== 'rpr') walk(child, style);
          });
          return;
        }
        if (local === 't') {
          runs.push({ text:String(node.textContent || ''), style:Object.assign({}, inheritedStyle), script:'' });
          return;
        }
        if (local === 'tab') {
          runs.push({ text:'\t', style:Object.assign({}, inheritedStyle), script:'' });
          return;
        }
        if (local === 'br' || local === 'cr') {
          runs.push({ text:'\n', style:Object.assign({}, inheritedStyle), script:'' });
          return;
        }
        if (local === 'object' || local === 'pict' || local === 'drawing') {
          const fontSizePt = Math.max(6, Number(inheritedStyle.fontSizePt) || 12);
          const tokens = typeof cv7991ImagePlaceholdersForNode === 'function'
            ? cv7991ImagePlaceholdersForNode(node, imageMap || {}, fontSizePt)
            : [];
          if (tokens && tokens.length) {
            runs.push({
              text:` ${tokens.join(' ')} `,
              style:Object.assign({}, inheritedStyle),
              script:''
            });
          }
          return;
        }
        if (local === 'alternatecontent') {
          const branches = wpTextBoxDirectChildren(node);
          const choice = branches.find((child) => wpTextBoxLocalName(child) === 'choice');
          const fallback = branches.find((child) => wpTextBoxLocalName(child) === 'fallback');
          const selected = choice || fallback;
          if (selected) wpTextBoxDirectChildren(selected).forEach((child) => walk(child, inheritedStyle));
          return;
        }
        wpTextBoxDirectChildren(node).forEach((child) => walk(child, inheritedStyle));
      };

      wpTextBoxDirectChildren(pNode).forEach((child) => walk(child, {}));
      return runs.filter((run) => run && String(run.text || '') !== '');
    }
    function wpOfficeTextBoxTablePlanFromShape(shapeNode, imageMap) {
      if (!shapeNode) return null;
      try {
        const txbxContent = wpTextBoxFirstDesc(shapeNode, 'txbxcontent');
        const tbl = txbxContent ? wpTextBoxFirstDesc(txbxContent, 'tbl') : null;
        if (!tbl) return null;

        const grid = wpTextBoxDirectChildren(tbl, 'tblgrid')[0] || null;
        const columnWidths = wpTextBoxDirectChildren(grid, 'gridcol').map((col) =>
          Math.max(0, Number(wpTextBoxAttr(col, 'w')) || 0)
        );
        const rows = [];
        const sourceRowHeightsPx = [];

        wpTextBoxDirectChildren(tbl, 'tr').forEach((tr) => {
          const trPr = wpTextBoxDirectChildren(tr, 'trpr')[0] || null;
          const trHeight = trPr ? wpTextBoxDirectChildren(trPr, 'trheight')[0] : null;
          sourceRowHeightsPx.push((Number(wpTextBoxAttr(trHeight, 'val')) || 0) / 15);

          const cells = [];
          wpTextBoxDirectChildren(tr, 'tc').forEach((tc) => {
            const tcPr = wpTextBoxDirectChildren(tc, 'tcpr')[0] || null;
            const gridSpanNode = tcPr ? wpTextBoxDirectChildren(tcPr, 'gridspan')[0] : null;
            const gridSpan = Math.max(1, parseInt(wpTextBoxAttr(gridSpanNode, 'val') || '1', 10) || 1);
            const vAlignNode = tcPr ? wpTextBoxDirectChildren(tcPr, 'valign')[0] : null;
            const vRaw = wpTextBoxAttr(vAlignNode, 'val').toLowerCase();
            const vAlign = vRaw === 'center' ? 'middle' : (vRaw === 'bottom' ? 'bottom' : 'top');
            const tcBorders = tcPr ? wpTextBoxDirectChildren(tcPr, 'tcborders')[0] : null;
            const borders = {};
            ['top','right','bottom','left'].forEach((edge) => {
              const edgeNode = tcBorders ? wpTextBoxDirectChildren(tcBorders, edge)[0] : null;
              if (edgeNode) borders[edge] = wpTextBoxBorder(edgeNode);
            });

            const paragraphs = [];
            const textParts = [];
            wpTextBoxDirectChildren(tc, 'p').forEach((p) => {
              const pPr = wpTextBoxDirectChildren(p, 'ppr')[0] || null;
              const jc = pPr ? wpTextBoxDirectChildren(pPr, 'jc')[0] : null;
              const jcVal = wpTextBoxAttr(jc, 'val').toLowerCase();
              const align = ['left','right','center','justify'].includes(jcVal) ? jcVal : '';
              const runs = wpTextBoxParagraphRuns(p, imageMap || {});
              if (runs.length || align) paragraphs.push({ runs, align });
              textParts.push(runs.map((run) => String(run.text || '')).join(''));
            });
            cells.push({
              text:textParts.join('\n'),
              paragraphs,
              gridSpan,
              rowSpan:1,
              skip:false,
              fill:'',
              vAlign,
              borders
            });
          });
          rows.push(cells);
        });
        if (!rows.length) return null;

        const autoDefaultPx = 18;
        const rowHeightBasis = sourceRowHeightsPx.map((value) => (Number(value) > 0 ? Number(value) : autoDefaultPx));
        const rowHeightTotal = rowHeightBasis.reduce((sum, value) => sum + Math.max(1, value), 0) || 1;
        const rowHeightPercentages = rowHeightBasis.map((value) => Math.max(1, value) / rowHeightTotal * 100);

        return {
          tableData:{
            id:`wp_textbox_${Date.now()}_${Math.random().toString(36).slice(2,7)}`,
            rows,
            columnWidths,
            sourceTableIndentPx:0,
            sourceRowHeightsPx,
            rowHeightPercentages,
            columnCount:columnWidths.length || Math.max(...rows.map((row)=>row.length),1),
            firstRowMerged:false,
            styleId:'',
            hasWordFormatting:true
          }
        };
      } catch (_) {
        return null;
      }
    }

    function wpOrdinaryDocxOfficeObjectVisual(plan, imageMap) {
      const item = plan || {};
      if (item.renderType === 'textbox-table' && item.tablePlan && item.tablePlan.tableData) {
        const shell = document.createElement('div');
        shell.className = 'mvip-office-textbox-table';
        shell.innerHTML = cv7991PresenterTableHtml(item.tablePlan.tableData, {
          imageMap:imageMap || {}
        });
        return shell;
      }
      if (item.renderType === 'word-group' && item.groupData) {
        const group = wpOfficeWordGroupElement(item.groupData, imageMap, item.marker);
        if (group instanceof Element) {
          group.classList.add('mvip-office-vector-group');
          group.dataset.officeObjectKind = 'shape-group';
        }
        return group;
      }
      if (item.renderType === 'shape' && item.shapePlan) {
        return wpOfficeShapeSvgElement(item.shapePlan, 'Hình vẽ trong Word', { exactArrowEndpoint:true });
      }
      if (item.renderType === 'image' && item.imageRelationId) {
        const imageData = imageMap && imageMap[String(item.imageRelationId)];
        let src = '';
        try {
          src = imageData && typeof cv7991PresenterImageDataUrl === 'function'
            ? cv7991PresenterImageDataUrl(imageData) : '';
        } catch (_) { src = ''; }
        if (src) {
          const image = document.createElement('img');
          image.src = src;
          image.alt = 'Hình ảnh trong Word';
          image.draggable = false;
          return image;
        }
      }
      if (item.renderType === 'chart' && item.chartPlan) {
        return wpOfficeChartSvgElement(item.chartPlan);
      }
      return null;
    }

    function wpOrdinaryDocxAnchorBounds(plan, markerElement, page) {
      const pageRect = page.getBoundingClientRect();
      const markerRect = markerElement.getBoundingClientRect();
      const paragraph = markerElement.closest('p') || markerElement.parentElement;
      const paragraphRect = paragraph instanceof Element
        ? paragraph.getBoundingClientRect() : markerRect;
      const style = getComputedStyle(page);
      const paddingLeft = parseFloat(style.paddingLeft) || 0;
      const paddingRight = parseFloat(style.paddingRight) || 0;
      const paddingTop = parseFloat(style.paddingTop) || 0;
      const paddingBottom = parseFloat(style.paddingBottom) || 0;
      const pageWidth = Math.max(1, Number(page.offsetWidth) || pageRect.width || 1);
      const pageHeight = Math.max(1, Number(page.offsetHeight) || pageRect.height || 1);
      const width = Math.max(1, wpOfficeNumber(plan.width, 1));
      const height = Math.max(1, wpOfficeNumber(plan.height, 1));
      const markerLeft = markerRect.left - pageRect.left;
      const markerTop = markerRect.top - pageRect.top;
      const paragraphLeft = paragraphRect.left - pageRect.left;
      const paragraphTop = paragraphRect.top - pageRect.top;
      const hRelative = String(plan.horizontalRelative || 'paragraph').toLowerCase();
      const vRelative = String(plan.verticalRelative || 'paragraph').toLowerCase();
      let left = /^(?:page|leftmargin|rightmargin|insidemargin|outsidemargin)$/.test(hRelative)
        ? 0 : (/^(?:margin)$/.test(hRelative) ? paddingLeft
          : (/^(?:character)$/.test(hRelative) ? markerLeft : paragraphLeft));
      let top = /^(?:page|topmargin|bottommargin|insidemargin|outsidemargin)$/.test(vRelative)
        ? 0 : (/^(?:margin)$/.test(vRelative) ? paddingTop
          : (/^(?:line|character)$/.test(vRelative) ? markerTop : paragraphTop));
      left += wpOfficeNumber(plan.horizontalOffset);
      top += wpOfficeNumber(plan.verticalOffset);
      const hAlign = String(plan.horizontalAlign || '').toLowerCase();
      const vAlign = String(plan.verticalAlign || '').toLowerCase();
      const hBoxStart = hRelative === 'margin' ? paddingLeft : 0;
      const hBoxWidth = hRelative === 'margin'
        ? Math.max(1, pageWidth - paddingLeft - paddingRight) : pageWidth;
      const vBoxStart = vRelative === 'margin' ? paddingTop : 0;
      const vBoxHeight = vRelative === 'margin'
        ? Math.max(1, pageHeight - paddingTop - paddingBottom) : pageHeight;
      if (hAlign === 'center') left = hBoxStart + (hBoxWidth - width) / 2;
      else if (hAlign === 'right' || hAlign === 'outside') left = hBoxStart + hBoxWidth - width;
      else if (hAlign === 'left' || hAlign === 'inside') left = hBoxStart;
      if (vAlign === 'center') top = vBoxStart + (vBoxHeight - height) / 2;
      else if (vAlign === 'bottom' || vAlign === 'outside') top = vBoxStart + vBoxHeight - height;
      else if (vAlign === 'top' || vAlign === 'inside') top = vBoxStart;
      return { left, top, width, height };
    }

    function wpCenterOrdinaryDocxCutSymbol(paragraph, plan) {
      if (!(paragraph instanceof HTMLElement) || !plan || !plan.centeredCutSymbol) return;
      const textNodes = [];
      const walker = document.createTreeWalker(paragraph, NodeFilter.SHOW_TEXT);
      while (walker.nextNode()) {
        const node = walker.currentNode;
        if (node && String(node.nodeValue || '').includes('\u2702')) textNodes.push(node);
      }
      const textNode = textNodes[0];
      if (!textNode || !textNode.parentNode) return;
      const source = String(textNode.nodeValue || '');
      const index = source.indexOf('\u2702');
      if (index < 0) return;
      const symbol = document.createElement('span');
      symbol.className = 'mvip-ordinary-word-cut-symbol';
      symbol.textContent = '\u2702';
      symbol.setAttribute('aria-label', 'Đường cắt');
      symbol.style.setProperty('position', 'absolute', 'important');
      symbol.style.setProperty('left', '50%', 'important');
      symbol.style.setProperty(
        'top', `${Math.round((wpOfficeNumber(plan.verticalOffset)
          + Math.max(1, wpOfficeNumber(plan.height, 1)) / 2) * 100) / 100}px`, 'important'
      );
      symbol.style.setProperty('transform', 'translate(-50%, -50%)', 'important');
      symbol.style.setProperty('display', 'inline-block', 'important');
      symbol.style.setProperty('font-family', '"Segoe UI Symbol", "Noto Sans Symbols 2", sans-serif', 'important');
      symbol.style.setProperty('font-size', 'inherit', 'important');
      symbol.style.setProperty('font-weight', '400', 'important');
      symbol.style.setProperty('font-style', 'normal', 'important');
      symbol.style.setProperty('line-height', '1', 'important');
      symbol.style.setProperty('padding', '0 2px', 'important');
      symbol.style.setProperty('background', '#ffffff', 'important');
      symbol.style.setProperty('z-index', '41', 'important');
      symbol.style.setProperty('pointer-events', 'none', 'important');
      const fragment = document.createDocumentFragment();
      if (index > 0) fragment.appendChild(document.createTextNode(source.slice(0, index)));
      fragment.appendChild(symbol);
      if (index + 1 < source.length) {
        fragment.appendChild(document.createTextNode(source.slice(index + 1)));
      }
      textNode.parentNode.replaceChild(fragment, textNode);
      paragraph.style.setProperty('position', 'relative', 'important');
      paragraph.style.setProperty('text-align', 'center', 'important');
    }

    function wpOrdinaryDocxUsesBothSidesWrap(plan) {
      return !!(plan && plan.flowWrapped && plan.wrapText === 'bothsides'
        && /^(square|tight|through)$/.test(plan.wrapType)
        && /^(column|paragraph|margin|page)$/.test(plan.horizontalRelative)
        && plan.verticalRelative === 'paragraph');
    }

    function wpLayoutOrdinaryDocxBothSidesAnchors(renderRoot) {
      const roots = new Map();
      Array.from(renderRoot.querySelectorAll('.is-word-both-sides-anchor, .is-word-overlay-anchor[data-ordinary-paragraph-plan]')).forEach((host) => {
        let plan;
        try { plan = JSON.parse(host.dataset.ordinaryBothSidesPlan || host.dataset.ordinaryParagraphPlan); } catch (_) { return; }
        const paragraph = host.closest('p');
        if (!paragraph) return;
        const column = paragraph.closest('td, th') || paragraph.closest('article') || paragraph.parentElement;
        const page = paragraph.closest('section.docx');
        if (!(column instanceof HTMLElement)) return;
        const columnRect = column.getBoundingClientRect();
        const columnWidth = column.clientWidth || columnRect.width;
        const columnBoxWidth = column.offsetWidth || columnWidth;
        const scale = columnBoxWidth > 0 && columnRect.width > 0 ? columnRect.width / columnBoxWidth : 1;
        const paragraphRect = paragraph.getBoundingClientRect();
        const columnStyle = getComputedStyle(column);
        const columnPaddingLeft = parseFloat(columnStyle.paddingLeft) || 0;
        const columnPaddingRight = parseFloat(columnStyle.paddingRight) || 0;
        let start = 0, referenceWidth = paragraph.clientWidth || columnWidth;
        if (plan.horizontalRelative === 'column') {
          start = (columnRect.left - paragraphRect.left) / scale
            + column.clientLeft + columnPaddingLeft;
          referenceWidth = columnWidth - columnPaddingLeft - columnPaddingRight;
        } else if (/^(margin|page)$/.test(plan.horizontalRelative) && page) {
          const pageStyle = getComputedStyle(page), pageRect = page.getBoundingClientRect();
          // Word may switch a dragged picture from a column offset to page
          // alignment. Resolve the origin AND width from the saved reference:
          // the whole page for "page", its text area for "margin".
          const textArea = plan.horizontalRelative === 'margin';
          const pageLeft = textArea ? (parseFloat(pageStyle.paddingLeft) || 0) : 0;
          const pageRight = textArea ? (parseFloat(pageStyle.paddingRight) || 0) : 0;
          start = (pageRect.left - paragraphRect.left) / scale + page.clientLeft + pageLeft;
          referenceWidth = (page.clientWidth || pageRect.width / scale) - pageLeft - pageRight;
        }
        let x = wpOfficeNumber(plan.horizontalOffset);
        if (plan.horizontalAlign === 'center') x = (referenceWidth - plan.width) / 2;
        else if (/^(right|outside)$/.test(plan.horizontalAlign)) x = referenceWidth - plan.width;
        else if (/^(left|inside)$/.test(plan.horizontalAlign)) x = 0;
        paragraph.style.setProperty('position', 'relative', 'important');
        host.style.setProperty('left', `${start + x}px`, 'important');
        host.style.setProperty('top', `${wpOfficeNumber(plan.verticalOffset)}px`, 'important');
        if (!plan.flowWrapped) return;
        host.dataset.cvSourceAnchor = JSON.stringify({
          leftPx: plan.distanceLeft || 0, rightPx: plan.distanceRight || 0,
          topPx: plan.distanceTop || 0, bottomPx: plan.distanceBottom || 0
        });
        if (!roots.has(column)) roots.set(column, []);
        roots.get(column).push(host);
      });
      // A float excludes everything from the page edge to the picture. Word's
      // bothSides wrapping leaves the text area to the LEFT of a central image usable.
      // Process outer containers first so nested cells keep their own spacers.
      Array.from(roots).sort(([a], [b]) => a === b ? 0 : (a.contains(b) ? -1 : (b.contains(a) ? 1 : 0)))
        .forEach(([root, drawings]) => cv7991WrapSourceParagraphText(root, {
          width: root.offsetWidth || root.clientWidth || root.getBoundingClientRect().width,
          drawings
        }));
    }

    function wpHydrateOrdinaryDocxOfficeObjects(renderRoot, officeObjects, imageMap) {
      if (!(renderRoot instanceof HTMLElement)
          || !Array.isArray(officeObjects) || !officeObjects.length) return;
      const inlinePlans = new Map(officeObjects.filter((item) => item && item.inline)
        .map((item) => [String(item.marker || ''), item]));
      if (inlinePlans.size) {
        const textNodes = [];
        const walker = document.createTreeWalker(renderRoot, NodeFilter.SHOW_TEXT);
        while (walker.nextNode()) {
          const text = String(walker.currentNode && walker.currentNode.nodeValue || '');
          if (/CV7991ORDOBJ\d+TOKEN/.test(text)) textNodes.push(walker.currentNode);
        }
        const tokenPattern = /CV7991ORDOBJ\d+TOKEN/g;
        textNodes.forEach((textNode) => {
          const source = String(textNode.nodeValue || '');
          const flowParagraph = textNode.parentElement && textNode.parentElement.closest
            ? textNode.parentElement.closest('p') : null;
          const flowContainerWidth = flowParagraph instanceof HTMLElement
            ? Math.max(0, Number(flowParagraph.clientWidth) || 0) : 0;
          let cursor = 0;
          let match;
          const fragment = document.createDocumentFragment();
          tokenPattern.lastIndex = 0;
          while ((match = tokenPattern.exec(source))) {
            if (match.index > cursor) fragment.appendChild(document.createTextNode(source.slice(cursor, match.index)));
            const plan = inlinePlans.get(match[0]);
            const visual = plan ? wpOrdinaryDocxOfficeObjectVisual(plan, imageMap) : null;
            if (plan && visual) {
              const host = document.createElement('span');
              host.className = 'mvip-office-inline-object';
              host.dataset.officeObjectMarker = String(plan.marker || '');
              if (plan.renderType === 'shape' || plan.renderType === 'word-group') {
                host.dataset.officeObjectKind = plan.renderType === 'shape' ? 'shape' : 'shape-group';
                if (plan.shapePlan && plan.shapePlan.presetName) {
                  host.dataset.officeShapePreset = String(plan.shapePlan.presetName);
                }
              }
              if (plan.flowAnchored) host.classList.add('is-word-paragraph-anchor');
              if (plan.flowWrapped) host.classList.add('is-word-text-wrap-anchor');
              if (plan.overlayAnchored) host.classList.add('is-word-overlay-anchor');
              if (plan.flowAnchored || plan.flowWrapped || plan.overlayAnchored) {
                // Paragraph attachment controls position, not paint order.
                // A later paragraph's picture (including its white margins)
                // must not cover a Shape that Word placed in front of it.
                host.style.setProperty('z-index',
                  String(Math.trunc(wpOfficeNumber(plan.zIndex, 1))), 'important');
              }
              host.style.width = `${Math.max(1, wpOfficeNumber(plan.width, 1))}px`;
              host.style.height = `${Math.max(1, wpOfficeNumber(plan.height, 1))}px`;
              if (plan.overlayAnchored) {
                if (plan.paragraphPositioned) host.dataset.ordinaryParagraphPlan = JSON.stringify(plan);
                const anchorParagraph = textNode.parentElement && textNode.parentElement.closest
                  ? textNode.parentElement.closest('p') : null;
                if (anchorParagraph instanceof HTMLElement) {
                  anchorParagraph.style.setProperty('position', 'relative', 'important');
                }
                host.style.setProperty('left', `${wpOfficeNumber(plan.horizontalOffset)}px`, 'important');
                host.style.setProperty('top', `${wpOfficeNumber(plan.verticalOffset)}px`, 'important');
              } else if (wpOrdinaryDocxUsesBothSidesWrap(plan)) {
                host.classList.add('is-word-both-sides-anchor');
                host.dataset.ordinaryBothSidesPlan = JSON.stringify(plan);
                host.dataset.cv7991SourceWrap = 'square';
                host.style.setProperty('float', 'none', 'important');
                host.style.setProperty('left', `${wpOfficeNumber(plan.horizontalOffset)}px`, 'important');
                host.style.setProperty('top', `${wpOfficeNumber(plan.verticalOffset)}px`, 'important');
              } else if (plan.flowWrapped) {
                const wrapText = String(plan.wrapText || '').toLowerCase();
                const horizontalAlign = String(plan.horizontalAlign || '').toLowerCase();
                const sourceOffset = Math.max(0, wpOfficeNumber(plan.horizontalOffset));
                const objectWidth = Math.max(1, wpOfficeNumber(plan.width, 1));
                /* wrapText=bothSides không tự nói ảnh nằm bên nào. Word còn
                   dùng positionH/posOffset trong chính ô hoặc cột. So vị trí
                   tâm ảnh với tâm vùng chứa để chọn float trái/phải: ảnh ở
                   Câu 14 đề bài có offset 0 -> trái; ảnh trong bảng hướng dẫn
                   chấm có offset 387px -> phải. */
                const anchorPastMiddle = flowContainerWidth > 0
                  && sourceOffset > Math.max(24, (flowContainerWidth - objectWidth) / 2);
                const floatSide = wrapText === 'left'
                  ? 'right'
                  : (wrapText === 'right' ? 'left'
                    : (/^(?:right|outside)$/.test(horizontalAlign) || anchorPastMiddle
                      ? 'right' : 'left'));
                const topAndBottom = String(plan.wrapType || '').toLowerCase() === 'topandbottom';
                const rightInset = floatSide === 'right' && flowContainerWidth > 0
                  ? Math.max(0, flowContainerWidth - sourceOffset - objectWidth) : 0;
                host.style.setProperty('float', topAndBottom ? 'none' : floatSide, 'important');
                host.style.setProperty('clear', topAndBottom ? 'both' : 'none', 'important');
                host.style.setProperty('display', 'block', 'important');
                host.style.setProperty('vertical-align', 'top', 'important');
                host.style.setProperty(
                  'margin-top',
                  `${Math.max(0, wpOfficeNumber(plan.verticalOffset) + wpOfficeNumber(plan.distanceTop))}px`,
                  'important'
                );
                host.style.setProperty(
                  'margin-bottom', `${Math.max(0, wpOfficeNumber(plan.distanceBottom))}px`, 'important'
                );
                host.style.setProperty(
                  'margin-left',
                  `${Math.max(0, topAndBottom
                    ? sourceOffset
                    : (floatSide === 'right' ? wpOfficeNumber(plan.distanceLeft) : sourceOffset))}px`,
                  'important'
                );
                host.style.setProperty(
                  'margin-right',
                  `${Math.max(0, topAndBottom ? 0
                    : (floatSide === 'left' ? wpOfficeNumber(plan.distanceRight) : rightInset))}px`,
                  'important'
                );
              } else if (plan.flowAnchored) {
                host.style.setProperty('vertical-align', 'top', 'important');
                host.style.setProperty('left', `${wpOfficeNumber(plan.horizontalOffset)}px`, 'important');
                host.style.setProperty('top', `${wpOfficeNumber(plan.verticalOffset)}px`, 'important');
              } else {
                host.style.setProperty('vertical-align', 'baseline', 'important');
              }
              if (plan.shapePlan && wpOfficeNumber(plan.shapePlan.rotation)) {
                host.style.transform = `rotate(${wpOfficeNumber(plan.shapePlan.rotation)}deg)`;
              }
              host.appendChild(visual);
              if (!mvipDocumentLinkTarget(textNode.parentElement)) mvipAttachObjectHyperlink(host, plan.hyperlink);
              fragment.appendChild(host);
            } else {
              fragment.appendChild(document.createTextNode(match[0]));
            }
            cursor = match.index + match[0].length;
          }
          if (cursor < source.length) fragment.appendChild(document.createTextNode(source.slice(cursor)));
          if (cursor > 0 && textNode.parentNode) textNode.parentNode.replaceChild(fragment, textNode);
        });
      }

      officeObjects.filter((item) => item && !item.inline).forEach((plan) => {
        const markerName = String(plan.marker || '');
        if (!markerName) return;
        const escaped = typeof CSS !== 'undefined' && CSS.escape
          ? CSS.escape(markerName) : markerName.replace(/[^A-Za-z0-9_-]/g, '');
        const marker = renderRoot.querySelector(`#${escaped}`);
        const page = marker && marker.closest('section.docx');
        if (!(marker instanceof HTMLElement) || !(page instanceof HTMLElement)) return;
        const paragraph = marker.closest('p');
        if (plan.centeredCutSymbol && paragraph instanceof HTMLElement) {
          wpCenterOrdinaryDocxCutSymbol(paragraph, plan);
        }
        const visual = wpOrdinaryDocxOfficeObjectVisual(plan, imageMap);
        if (!visual) return;
        const bounds = wpOrdinaryDocxAnchorBounds(plan, marker, page);
        const layer = wpOfficeObjectLayer(page, !!plan.behindText);
        if (!(layer instanceof HTMLElement)) return;
        const rotation = plan.shapePlan ? wpOfficeNumber(plan.shapePlan.rotation) : 0;
        const host = wpOfficeObjectHost(bounds, {
          zIndex:plan.zIndex,
          rotation,
          objectKind:plan.renderType === 'shape' ? 'shape'
            : (plan.renderType === 'word-group' ? 'shape-group' : plan.renderType),
          objectPreset:plan.shapePlan && plan.shapePlan.presetName,
        });
        host.dataset.officeObjectMarker = markerName;
        host.appendChild(visual);
        mvipAttachObjectHyperlink(host, plan.hyperlink);
        layer.appendChild(host);
        marker.remove();
      });

      wpLayoutOrdinaryDocxBothSidesAnchors(renderRoot);

      /* Khi một Shape wrapNone được neo trong đoạn có chữ, Word thường dùng
         các đoạn rỗng kế tiếp để dành chỗ tới hết hình. Nếu engine HTML nén
         dù chỉ một đoạn, nhãn đáy (như K) sẽ chạm câu kế tiếp. Đo trực tiếp
         đáy hình đã dựng và mốc đoạn có nội dung đầu tiên sau chuỗi đoạn rỗng,
         rồi chỉ bù đúng phần còn thiếu. Shape không có đoạn rỗng theo sau
         (hình Câu 4 đặt cạnh chữ) hoàn toàn không đi qua nhánh này. */
      officeObjects.filter((item) => item && item.overlayAnchored
          && item.flowAfterMarker).forEach((plan) => {
        const markerName = String(plan.marker || '');
        const afterMarkerName = String(plan.flowAfterMarker || '');
        const afterMarker = afterMarkerName
          ? renderRoot.querySelector(`#${afterMarkerName}`) : null;
        const afterParagraph = afterMarker && afterMarker.closest('p');
        const host = Array.from(renderRoot.querySelectorAll(
          '.mvip-office-inline-object[data-office-object-marker]'
        )).find((element) => String(element.dataset.officeObjectMarker || '') === markerName);
        if (!(host instanceof HTMLElement) || !(afterParagraph instanceof HTMLElement)) {
          if (afterMarker) afterMarker.remove();
          return;
        }
        const hostRect = host.getBoundingClientRect();
        let visualBottom = hostRect.bottom;
        Array.from(host.querySelectorAll(
          '.cv7991-word-group-html-label, svg, canvas, img'
        )).forEach((element) => {
          const rect = element.getBoundingClientRect();
          if (Number.isFinite(rect.bottom) && rect.width >= 0 && rect.height >= 0) {
            visualBottom = Math.max(visualBottom, rect.bottom);
          }
        });
        const afterRect = afterParagraph.getBoundingClientRect();
        const page = afterParagraph.closest('section.docx');
        const pageRect = page instanceof HTMLElement ? page.getBoundingClientRect() : null;
        const pageScaleY = page instanceof HTMLElement && pageRect
          ? Math.max(.05, Math.min(20,
            (Number(pageRect.height) || Number(page.offsetHeight) || 1)
              / Math.max(1, Number(page.offsetHeight) || Number(pageRect.height) || 1)
          )) : 1;
        let linePx = 0;
        try {
          linePx = parseFloat(String(getComputedStyle(afterParagraph).lineHeight || '')) || 0;
        } catch (_) {}
        const sourceGapPx = Math.max(2, Math.min(8, linePx > 0 ? linePx * .16 : 4));
        const missingPx = (visualBottom - afterRect.top) / pageScaleY + sourceGapPx;
        if (missingPx > .5 && afterParagraph.parentNode) {
          const spacer = document.createElement('div');
          spacer.className = 'mvip-ordinary-word-overlay-clearance';
          spacer.setAttribute('aria-hidden', 'true');
          spacer.dataset.officeObjectMarker = markerName;
          spacer.style.setProperty('display', 'block', 'important');
          spacer.style.setProperty('width', '0', 'important');
          spacer.style.setProperty('height', `${Math.ceil(missingPx * 100) / 100}px`, 'important');
          spacer.style.setProperty('margin', '0', 'important');
          spacer.style.setProperty('padding', '0', 'important');
          spacer.style.setProperty('border', '0', 'important');
          spacer.style.setProperty('overflow', 'hidden', 'important');
          afterParagraph.parentNode.insertBefore(spacer, afterParagraph);
        }
        afterMarker.remove();
      });
    }

    function wpIsOrdinaryDocxNativeLineSvg(element) {
      if (!(element instanceof SVGElement)) return false;
      if (!element.closest('.ordinary-docx-render section.docx')) return false;
      if (element.closest('.mvip-office-object, .mvip-office-inline-object')) return false;
      const visibleChildren = Array.from(element.children || []).filter((child) =>
        !['defs', 'title', 'desc'].includes(String(child.localName || '').toLowerCase())
      );
      return visibleChildren.length === 1
        && String(visibleChildren[0].localName || '').toLowerCase() === 'line';
    }

    function wpNormalizeOrdinaryDocxNativeLines(renderRoot) {
      if (!(renderRoot instanceof Element)) return;
      Array.from(renderRoot.querySelectorAll('svg')).forEach((svg) => {
        if (!wpIsOrdinaryDocxNativeLineSvg(svg)) return;
        const paragraph = svg.closest('p');
        if (paragraph instanceof HTMLElement) {
          try {
            if (getComputedStyle(paragraph).position === 'static') {
              paragraph.style.position = 'relative';
            }
          } catch (_) { paragraph.style.position = 'relative'; }
          /* VML from/to đã chứa độ lệch thật trong hệ tọa độ của đoạn. Đặt
             hộp SVG tại gốc đoạn để không cộng thêm “vị trí tĩnh” của run;
             đây là nguyên nhân nét trong đoạn căn giữa bị trượt sang phải. */
          svg.style.setProperty('left', '0px', 'important');
          svg.style.setProperty('top', '0px', 'important');
        }
        svg.classList.add('mvip-word-native-line');
        svg.classList.remove('cv7991-presentation-image-frame', 'word-presentation-direct-zoom');
        svg.removeAttribute('data-word-image-zoom');
        if (svg.getAttribute('role') === 'button') svg.removeAttribute('role');
        if (svg.getAttribute('tabindex') === '0') svg.removeAttribute('tabindex');
        if (/phóng to/i.test(String(svg.getAttribute('aria-label') || ''))) svg.removeAttribute('aria-label');
        if (/phóng to/i.test(String(svg.getAttribute('title') || ''))) svg.removeAttribute('title');
      });
    }

    function wpOrdinaryDocxRenderOptions() {
      return {
        className: 'docx',
        inWrapper: true,
        ignoreWidth: false,
        ignoreHeight: false,
        ignoreFonts: false,
        breakPages: true,
        ignoreLastRenderedPageBreak: false,
        renderHeaders: true,
        renderFooters: true,
        renderFootnotes: true,
        renderEndnotes: true,
        useBase64URL: true,
        useMathMLPolyfill: true,
        experimental: true,
      };
    }

    async function wpRenderOrdinaryDocxTree(
      preview, renderBuffer, renderRoot, styleRoot, preparedDocument, settleTabs = true
    ) {
      await preview.renderAsync(
        renderBuffer,
        renderRoot,
        styleRoot,
        wpOrdinaryDocxRenderOptions()
      );
      if (window.mvipWordVideo) window.mvipWordVideo.hydrate(renderRoot, preparedDocument.embeddedVideos);
      wpNormalizeOrdinaryDocxNativeLines(renderRoot);
      if (((Array.isArray(preparedDocument.equations) && preparedDocument.equations.length)
            || (Array.isArray(preparedDocument.formulas) && preparedDocument.formulas.length))
          && typeof cv7991WaitForMathJax === 'function') {
        try { await cv7991WaitForMathJax(); } catch (_) {}
      }
      await wpHydrateOrdinaryDocxMath(
        renderRoot,
        preparedDocument.formulas,
        preparedDocument.equations,
        preparedDocument.imageMap
      );
      try {
        wpApplyOrdinaryDocxTableLayouts(renderRoot, preparedDocument.tableLayouts);
      } catch (_) {}
      const pages = Array.from(renderRoot.querySelectorAll('section.docx'));
      if (!pages.length) throw new Error('File Word không có trang để trình chiếu.');
      if (preparedDocument.suppressFirstPageHeader && pages[0] instanceof HTMLElement) {
        const firstPageHeader = Array.from(pages[0].children || []).find((element) =>
          String(element && element.localName || '').toLowerCase() === 'header'
        );
        if (firstPageHeader) firstPageHeader.remove();
      }
      if (document.fonts && document.fonts.ready) {
        try { await document.fonts.ready; } catch (_) {}
      }
      /* docx-preview tự tính Tab sau 500 ms. Chờ lượt đó hoàn tất rồi áp lại
         mốc Word sau cùng, khi cỡ chữ và kích thước MathType đều đã ổn định. */
      if (Array.isArray(preparedDocument.tabParagraphs) && preparedDocument.tabParagraphs.length) {
        if (settleTabs) await new Promise((resolve) => setTimeout(resolve, 560));
        else await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
        try {
          wpApplyOrdinaryDocxTabStops(
            renderRoot,
            preparedDocument.tabParagraphs,
            preparedDocument.defaultTabTwips
          );
        } catch (_) {}
        await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      }
      try {
        wpApplyOrdinaryDocxParagraphLayouts(
          renderRoot,
          preparedDocument.paragraphLayouts
        );
      } catch (_) {}
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      try {
        wpHydrateOrdinaryDocxOfficeObjects(
          renderRoot,
          preparedDocument.officeObjects,
          preparedDocument.imageMap
        );
      } catch (error) {
        console.warn('Không đặt lại được một số đối tượng Word theo hình học nguồn:', error);
      }
      wpNormalizeOrdinaryDocxNativeLines(renderRoot);
      return {
        pages,
        wrapper: renderRoot.querySelector('.docx-wrapper') || renderRoot,
      };
    }

    async function wpOrdinaryDocxFirstPagesBuffer(arrayBuffer, pageLimit = 2) {
      if (!window.JSZip || !(arrayBuffer instanceof ArrayBuffer)) return null;
      try {
        const zip = await window.JSZip.loadAsync(arrayBuffer);
        const entry = zip.file('word/document.xml');
        if (!entry) return null;
        const parser = new DOMParser();
        const doc = parser.parseFromString(await entry.async('string'), 'application/xml');
        if (doc.getElementsByTagName('parsererror').length) return null;
        const localNameOf = (node) => String(node && (node.localName || node.nodeName) || '')
          .split(':').pop().toLowerCase();
        const attrByLocalName = (node, name) => {
          const wanted = String(name || '').toLowerCase();
          const attr = Array.from(node && node.attributes || []).find((item) =>
            String(item && (item.localName || item.name) || '').split(':').pop().toLowerCase() === wanted
          );
          return String(attr && attr.value || '').trim();
        };
        const body = Array.from(doc.getElementsByTagName('*'))
          .find((node) => localNameOf(node) === 'body');
        if (!body) return null;
        const limit = Math.max(1, Number(pageLimit) || 2);
        let storedPageCount = 0;
        const appPropertiesEntry = zip.file('docProps/app.xml');
        if (appPropertiesEntry) {
          try {
            const appDoc = parser.parseFromString(
              await appPropertiesEntry.async('string'),
              'application/xml'
            );
            const pagesNode = Array.from(appDoc.getElementsByTagName('*'))
              .find((node) => localNameOf(node) === 'pages');
            const parsedPages = parseInt(String(pagesNode && pagesNode.textContent || ''), 10);
            if (Number.isFinite(parsedPages) && parsedPages > 0) storedPageCount = parsedPages;
          } catch (_) {}
        }
        const allElements = Array.from(body.getElementsByTagName('*'));
        const renderedBreaks = allElements.filter((node) => localNameOf(node) === 'lastrenderedpagebreak');
        const explicitBreaks = allElements.filter((node) => {
          const local = localNameOf(node);
          return local === 'pagebreakbefore'
            || (local === 'br' && attrByLocalName(node, 'type').toLowerCase() === 'page');
        });
        /* lastRenderedPageBreak là mốc trang Word đã lưu gần nhất và không bị
           đếm trùng với w:br. Chỉ dùng w:br/pageBreakBefore khi tài liệu không
           có các mốc đã dựng sẵn. */
        const pageBreaks = renderedBreaks.length ? renderedBreaks : explicitBreaks;
        const boundary = pageBreaks[limit - 1];
        const directSectionProperties = Array.from(body.childNodes || []).find((node) =>
          node && node.nodeType === Node.ELEMENT_NODE && localNameOf(node) === 'sectpr'
        );
        const finalSectionClone = directSectionProperties
          ? directSectionProperties.cloneNode(true) : null;
        const restoreFinalSection = () => {
          const stillHasSection = Array.from(body.childNodes || []).some((node) =>
            node && node.nodeType === Node.ELEMENT_NODE && localNameOf(node) === 'sectpr'
          );
          if (!stillHasSection && finalSectionClone) body.appendChild(finalSectionClone.cloneNode(true));
        };
        const finishPreviewPackage = async () => {
          restoreFinalSection();
          zip.file('word/document.xml', new XMLSerializer().serializeToString(doc));
          return await zip.generateAsync({ type: 'arraybuffer', compression: 'DEFLATE' });
        };

        if (!boundary) {
          /* Một số file Word (đặc biệt file vừa tạo hoặc chưa repaginate) không
             lưu w:lastRenderedPageBreak. Trước đây trường hợp này buộc phải
             quét cả tài liệu. Tạo một tiền tố ước lượng theo số trang trong
             app.xml và số khối/row để vẫn hiện phần đầu gần như tức thì. */
          const directBlocks = Array.from(body.childNodes || []).filter((node) =>
            node && node.nodeType === Node.ELEMENT_NODE && localNameOf(node) !== 'sectpr'
          );
          const logicalUnits = [];
          directBlocks.forEach((block) => {
            if (localNameOf(block) === 'p') {
              logicalUnits.push(block);
              return;
            }
            /* Bảng tính theo hàng; content-control (w:sdt) tính theo các đoạn
               và hàng ngoài cùng. Nhờ đó cả tài liệu dài nằm trong một sdt
               hoặc một bảng lớn vẫn tách được bản xem nhanh hợp lệ. */
            const nestedUnits = Array.from(block.getElementsByTagName('*')).filter((node) => {
              const name = localNameOf(node);
              if (name !== 'p' && name !== 'tr') return false;
              let ancestor = node.parentNode;
              while (ancestor && ancestor !== block) {
                const ancestorName = localNameOf(ancestor);
                if (name === 'p' && ancestorName === 'tbl') return false;
                if (name === 'tr' && ancestorName === 'tr') return false;
                ancestor = ancestor.parentNode;
              }
              return true;
            });
            if (nestedUnits.length) nestedUnits.forEach((node) => logicalUnits.push(node));
            else logicalUnits.push(block);
          });
          const looksLong = storedPageCount > limit || logicalUnits.length > 24;
          if (!looksLong || logicalUnits.length < 2) return null;
          let wantedUnitCount = storedPageCount > limit
            ? Math.ceil((logicalUnits.length / storedPageCount) * (limit + 0.35))
            : Math.max(18, Math.ceil(logicalUnits.length * 0.3));
          wantedUnitCount = Math.max(1, Math.min(72, wantedUnitCount, logicalUnits.length - 1));
          let keptNode = logicalUnits[wantedUnitCount - 1];
          if (!keptNode || !body.contains(keptNode)) return null;

          /* Giữ trọn khối cuối đã chọn (hoặc trọn hàng nếu là bảng), rồi xóa
             các anh em phía sau ở từng cấp. Cách này không cắt vỡ XML bảng. */
          while (keptNode && keptNode.parentNode) {
            const parent = keptNode.parentNode;
            let following = keptNode.nextSibling;
            while (following) {
              const next = following.nextSibling;
              if (!(parent === body && following.nodeType === Node.ELEMENT_NODE
                    && localNameOf(following) === 'sectpr')) {
                parent.removeChild(following);
              }
              following = next;
            }
            if (parent === body) break;
            keptNode = parent;
          }
          return await finishPreviewPackage();
        }

        let topBlock = boundary;
        while (topBlock && topBlock.parentNode !== body) topBlock = topBlock.parentNode;
        if (!topBlock || topBlock.parentNode !== body) return null;

        let firstBodyNodeToRemove = null;
        if (localNameOf(boundary) === 'pagebreakbefore') {
          firstBodyNodeToRemove = topBlock;
        } else {
          const firstParent = boundary.parentNode;
          if (!firstParent) return null;
          let sibling = boundary;
          while (sibling) {
            const next = sibling.nextSibling;
            firstParent.removeChild(sibling);
            sibling = next;
          }
          let keptAncestor = firstParent;
          while (keptAncestor && keptAncestor.parentNode && keptAncestor.parentNode !== body) {
            let following = keptAncestor.nextSibling;
            while (following) {
              const next = following.nextSibling;
              keptAncestor.parentNode.removeChild(following);
              following = next;
            }
            keptAncestor = keptAncestor.parentNode;
          }
          topBlock = keptAncestor || topBlock;
          firstBodyNodeToRemove = topBlock && topBlock.nextSibling;
        }

        let afterBlock = firstBodyNodeToRemove;
        while (afterBlock) {
          const next = afterBlock.nextSibling;
          if (!(afterBlock.nodeType === Node.ELEMENT_NODE && localNameOf(afterBlock) === 'sectpr')) {
            body.removeChild(afterBlock);
          }
          afterBlock = next;
        }
        return await finishPreviewPackage();
      } catch (_) {
        return null;
      }
    }

    function wpScheduleOrdinaryDocxFullRender(
      preview, originalArrayBuffer, visiblePageHost, loadToken
    ) {
      const run = async () => {
        wpOrdinaryState.docxLazyIdleHandle = 0;
        wpOrdinaryState.docxLazyIdleKind = '';
        if (loadToken !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'docx') return;
        const idleHost = document.createElement('div');
        idleHost.className = 'ordinary-docx-idle-host';
        const backgroundRenderRoot = document.createElement('div');
        backgroundRenderRoot.className = 'ordinary-docx-render';
        const backgroundStyleRoot = document.createElement('div');
        backgroundStyleRoot.className = 'ordinary-docx-style-root';
        backgroundStyleRoot.setAttribute('aria-hidden', 'true');
        idleHost.append(backgroundRenderRoot, backgroundStyleRoot);
        document.body.appendChild(idleHost);
        wpOrdinaryState.docxLazyHost = idleHost;
        try {
          /* Chỉ tới lượt rảnh mới quét Equation/MathType của phần còn lại.
             Đây là khác biệt quan trọng với cách cũ: hai trang đầu không còn
             phải chờ bước chuẩn bị toàn bộ tài liệu hoàn tất. */
          const preparedDocument = await wpPrepareOrdinaryDocxFormulas(originalArrayBuffer);
          if (loadToken !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'docx') return;
          const rendered = await wpRenderOrdinaryDocxTree(
            preview,
            preparedDocument.arrayBuffer,
            backgroundRenderRoot,
            backgroundStyleRoot,
            preparedDocument,
            true
          );
          if (loadToken !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'docx') return;
          const preservedIndex = Math.max(0, Math.min(
            Number(wpOrdinaryState.pageIndex) || 0,
            rendered.pages.length - 1
          ));
          visiblePageHost.replaceChildren(backgroundRenderRoot, backgroundStyleRoot);
          idleHost.remove();
          wpOrdinaryState.docxLazyHost = null;
          wpOrdinaryState.docxPages = rendered.pages;
          wpOrdinaryState.docxWrapper = rendered.wrapper;
          wpOrdinaryState.pageCount = rendered.pages.length;
          wpOrdinaryState.docxPageCountHint = Math.max(
            rendered.pages.length,
            Number(preparedDocument.pageCountHint) || 0
          );
          wpPrepareOrdinaryDocxPages(
            wpOrdinaryState.docxPageCountHint,
            Math.max(1, Number(preparedDocument.pageNumberStart) || 1)
          );
          wpOrdinaryState.pageIndex = preservedIndex;
          wpSyncOrdinaryPageUi();
          requestAnimationFrame(() => wpScrollOrdinaryPage(preservedIndex, false));
        } catch (error) {
          console.warn('Không dựng tiếp được các trang Word ở chế độ nền:', error);
        } finally {
          if (idleHost.isConnected) idleHost.remove();
          if (wpOrdinaryState.docxLazyHost === idleHost) wpOrdinaryState.docxLazyHost = null;
        }
      };
      if (typeof window.requestIdleCallback === 'function') {
        wpOrdinaryState.docxLazyIdleKind = 'idle';
        wpOrdinaryState.docxLazyIdleHandle = window.requestIdleCallback(() => { void run(); }, { timeout: 1200 });
      } else {
        wpOrdinaryState.docxLazyIdleKind = 'timer';
        wpOrdinaryState.docxLazyIdleHandle = setTimeout(() => { void run(); }, 650);
      }
    }

    async function wpLoadOrdinaryDocx(file, arrayBuffer) {
      const preview = await wpEnsureDocxPreviewRenderer();
      const loadToken = wpOrdinaryState.renderToken;
      wpOrdinaryState.kind = 'docx';
      card.className = 'word-presentation-card ordinary-document-card';
      card.innerHTML = '<div class="ordinary-document-page-host"><div class="ordinary-docx-render"></div><div class="ordinary-docx-style-root" aria-hidden="true"></div></div>';
      const pageHost = card.querySelector('.ordinary-document-page-host');
      const renderRoot = card.querySelector('.ordinary-docx-render');
      const styleRoot = card.querySelector('.ordinary-docx-style-root');
      if (!(pageHost instanceof HTMLElement)
          || !(renderRoot instanceof HTMLElement) || !(styleRoot instanceof HTMLElement)) {
        throw new Error('Không tạo được vùng trình chiếu Word.');
      }
      /* Tách phần đầu từ DOCX gốc trước khi nhận diện công thức. Với file dài,
         lượt chuẩn bị đầu tiên vì thế chỉ đọc Equation/MathType của khoảng hai
         trang thay vì của toàn bộ tài liệu. */
      const firstPagesBuffer = await wpOrdinaryDocxFirstPagesBuffer(arrayBuffer, 2);
      const preparedDocument = await wpPrepareOrdinaryDocxFormulas(firstPagesBuffer || arrayBuffer);
      wpOrdinaryState.docxPageCountHint = Math.max(0, Number(preparedDocument.pageCountHint) || 0);
      const pageNumberStart = Math.max(1, Number(preparedDocument.pageNumberStart) || 1);
      const rendered = await wpRenderOrdinaryDocxTree(
        preview,
        preparedDocument.arrayBuffer,
        renderRoot,
        styleRoot,
        preparedDocument,
        !firstPagesBuffer
      );
      if (loadToken !== wpOrdinaryState.renderToken || wpOrdinaryState.kind !== 'docx') return;
      wpOrdinaryState.docxPages = rendered.pages;
      wpOrdinaryState.docxWrapper = rendered.wrapper;
      wpOrdinaryState.pageCount = rendered.pages.length;
      wpPrepareOrdinaryDocxPages(
        wpOrdinaryState.docxPageCountHint || rendered.pages.length,
        pageNumberStart
      );
      if (firstPagesBuffer) {
        /* Hai trang đầu đã có thể đọc/viết/quét ngay. Toàn bộ tài liệu được
           dựng vào một cây ngoài màn hình ở lượt rảnh rồi thay thế nguyên tử,
           nên không làm xê dịch trang đang trình chiếu giữa chừng. */
        await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
        wpScheduleOrdinaryDocxFullRender(
          preview,
          arrayBuffer,
          pageHost,
          loadToken
        );
      }
    }

    function wpSpreadsheetDefaultPalette() {
      const colors = [
        '#000000', '#ffffff', '#ff0000', '#00ff00', '#0000ff', '#ffff00', '#ff00ff', '#00ffff',
        '#800000', '#008000', '#000080', '#808000', '#800080', '#008080', '#c0c0c0', '#808080',
        '#9999ff', '#993366', '#ffffcc', '#ccffff', '#660066', '#ff8080', '#0066cc', '#ccccff',
        '#000080', '#ff00ff', '#ffff00', '#00ffff', '#800080', '#800000', '#008080', '#0000ff',
        '#00ccff', '#ccffff', '#ccffcc', '#ffff99', '#99ccff', '#ff99cc', '#cc99ff', '#ffcc99',
        '#3366ff', '#33cccc', '#99cc00', '#ffcc00', '#ff9900', '#ff6600', '#666699', '#969696',
        '#003366', '#339966', '#003300', '#333300', '#993300', '#993366', '#333399', '#333333',
      ];
      const palette = new Map();
      colors.forEach((color, index) => palette.set(index + 8, color));
      palette.set(0, '#000000');
      palette.set(1, '#ffffff');
      palette.set(2, '#ff0000');
      palette.set(3, '#00ff00');
      palette.set(4, '#0000ff');
      palette.set(5, '#ffff00');
      palette.set(6, '#ff00ff');
      palette.set(7, '#00ffff');
      return palette;
    }

    function wpReadLegacySpreadsheetStyles(XLSX, arrayBuffer) {
      try {
        const source = new Uint8Array(arrayBuffer);
        const oleSignature = [0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1];
        if (!oleSignature.every((value, index) => source[index] === value)) return null;
        if (!XLSX || !XLSX.CFB || typeof XLSX.CFB.read !== 'function') return null;
        const cfb = XLSX.CFB.read(source, { type: 'array' });
        const paths = Array.isArray(cfb && cfb.FullPaths) ? cfb.FullPaths : [];
        const files = Array.isArray(cfb && cfb.FileIndex) ? cfb.FileIndex : [];
        const workbookIndex = paths.findIndex((path) => /\/(?:Workbook|Book)$/i.test(String(path || '')));
        const content = workbookIndex >= 0 && files[workbookIndex] && files[workbookIndex].content;
        if (!content) return null;
        const bytes = content instanceof Uint8Array ? content : new Uint8Array(content);
        const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
        const canRead = (offset, size) => offset >= 0 && offset + size <= view.byteLength;
        const u8 = (offset) => canRead(offset, 1) ? view.getUint8(offset) : 0;
        const u16 = (offset) => canRead(offset, 2) ? view.getUint16(offset, true) : 0;
        const u32 = (offset) => canRead(offset, 4) ? view.getUint32(offset, true) : 0;
        const fonts = [];
        const xfs = [];
        const sheetOffsets = [];
        const palette = wpSpreadsheetDefaultPalette();

        const readFont = (offset, length) => {
          if (fonts.length === 4) fonts.push({ name: 'Times New Roman', height: 240, weight: 400 });
          const optionFlags = u16(offset + 2);
          const characterCount = u8(offset + 14);
          const unicode = !!(u8(offset + 15) & 1);
          let name = '';
          const nameOffset = offset + 16;
          if (unicode) {
            for (let index = 0; index < characterCount && canRead(nameOffset + index * 2, 2); index += 1) {
              name += String.fromCharCode(u16(nameOffset + index * 2));
            }
          } else {
            for (let index = 0; index < characterCount && canRead(nameOffset + index, 1); index += 1) {
              name += String.fromCharCode(u8(nameOffset + index));
            }
          }
          const weight = u16(offset + 6) || ((optionFlags & 1) ? 700 : 400);
          return {
            name: name || 'Arial',
            height: u16(offset) || 220,
            colorIndex: u16(offset + 4),
            weight,
            bold: !!(optionFlags & 1) || weight >= 700,
            italic: !!(optionFlags & 2),
            underline: u8(offset + 10),
            strike: !!(optionFlags & 8),
          };
        };

        const readXf = (offset, length) => {
          if (length < 20) return null;
          const alignment1 = u8(offset + 6);
          const alignment2 = u8(offset + 8);
          const border1 = u32(offset + 10);
          const border2 = u32(offset + 14);
          const border3 = u16(offset + 18);
          return {
            fontIndex: u16(offset),
            formatIndex: u16(offset + 2),
            horizontal: alignment1 & 0x07,
            wrap: !!(alignment1 & 0x08),
            vertical: (alignment1 >>> 4) & 0x07,
            rotation: u8(offset + 7),
            indent: alignment2 & 0x0f,
            shrink: !!(alignment2 & 0x10),
            border: {
              leftStyle: border1 & 0x0f,
              rightStyle: (border1 >>> 4) & 0x0f,
              topStyle: (border1 >>> 8) & 0x0f,
              bottomStyle: (border1 >>> 12) & 0x0f,
              leftColor: (border1 >>> 16) & 0x7f,
              rightColor: (border1 >>> 23) & 0x7f,
              topColor: border2 & 0x7f,
              bottomColor: (border2 >>> 7) & 0x7f,
            },
            fill: {
              pattern: (border2 >>> 26) & 0x3f,
              foreground: border3 & 0x7f,
              background: (border3 >>> 7) & 0x7f,
            },
          };
        };

        let offset = 0;
        while (canRead(offset, 4)) {
          const recordId = u16(offset);
          const length = u16(offset + 2);
          const dataOffset = offset + 4;
          if (!canRead(dataOffset, length)) break;
          if (recordId === 0x0031) fonts.push(readFont(dataOffset, length));
          else if (recordId === 0x00e0) {
            const xf = readXf(dataOffset, length);
            if (xf) xfs.push(xf);
          } else if (recordId === 0x0085 && length >= 4) {
            sheetOffsets.push(u32(dataOffset));
          } else if (recordId === 0x0092 && length >= 2) {
            const colorCount = u16(dataOffset);
            for (let index = 0; index < colorCount; index += 1) {
              const colorOffset = dataOffset + 2 + index * 4;
              if (!canRead(colorOffset, 4)) break;
              const hex = [u8(colorOffset), u8(colorOffset + 1), u8(colorOffset + 2)]
                .map((value) => value.toString(16).padStart(2, '0')).join('');
              palette.set(index + 8, `#${hex}`);
            }
          }
          offset = dataOffset + length;
        }

        const sheets = sheetOffsets.map((sheetOffset) => {
          const cellXfs = new Map();
          const rowXfs = new Map();
          const columnXfs = new Map();
          const rowDimensions = new Map();
          const columnDimensions = [];
          let position = Math.max(0, Number(sheetOffset) || 0);
          while (canRead(position, 4)) {
            const recordId = u16(position);
            const length = u16(position + 2);
            const dataOffset = position + 4;
            if (!canRead(dataOffset, length)) break;
            if (recordId === 0x000a) break;
            const cellRecordIds = [0x0006, 0x00d6, 0x00fd, 0x0201, 0x0203, 0x0204, 0x0205, 0x027e];
            if (cellRecordIds.includes(recordId) && length >= 6) {
              cellXfs.set(`${u16(dataOffset)}:${u16(dataOffset + 2)}`, u16(dataOffset + 4));
            } else if (recordId === 0x00bd && length >= 12) {
              const rowIndex = u16(dataOffset);
              const firstColumn = u16(dataOffset + 2);
              const lastColumn = u16(dataOffset + length - 2);
              for (let columnIndex = firstColumn; columnIndex <= lastColumn; columnIndex += 1) {
                cellXfs.set(`${rowIndex}:${columnIndex}`,
                  u16(dataOffset + 4 + (columnIndex - firstColumn) * 6));
              }
            } else if (recordId === 0x00be && length >= 8) {
              const rowIndex = u16(dataOffset);
              const firstColumn = u16(dataOffset + 2);
              const lastColumn = u16(dataOffset + length - 2);
              for (let columnIndex = firstColumn; columnIndex <= lastColumn; columnIndex += 1) {
                cellXfs.set(`${rowIndex}:${columnIndex}`,
                  u16(dataOffset + 4 + (columnIndex - firstColumn) * 2));
              }
            } else if (recordId === 0x007d && length >= 10) {
              const firstColumn = u16(dataOffset);
              const lastColumn = u16(dataOffset + 2);
              const width = u16(dataOffset + 4) / 256;
              const xfIndex = u16(dataOffset + 6);
              const flags = u16(dataOffset + 8);
              columnDimensions.push({
                min:firstColumn,
                max:lastColumn,
                width:width > 0 ? width : 0,
                hidden:!!(flags & 0x0001),
              });
              for (let columnIndex = firstColumn; columnIndex <= lastColumn; columnIndex += 1) {
                columnXfs.set(columnIndex, xfIndex);
              }
            } else if (recordId === 0x0208 && length >= 16) {
              const rowIndex = u16(dataOffset);
              const pointHeight = u16(dataOffset + 6) / 20;
              const flags = u32(dataOffset + 12);
              rowDimensions.set(rowIndex, {
                hpt:pointHeight > 0 ? pointHeight : 0,
                hidden:!!(flags & 0x20),
              });
              if (flags & 0x80) rowXfs.set(rowIndex, (flags >>> 16) & 0x0fff);
            }
            position = dataOffset + length;
          }
          return { cellXfs, rowXfs, columnXfs, rowDimensions, columnDimensions };
        });

        if (!fonts.length || !xfs.length || !sheets.length) return null;
        return { fonts, xfs, sheets, palette };
      } catch (_) {
        return null;
      }
    }

    function wpReadOpenXmlSpreadsheetStyles(XLSX, arrayBuffer, workbook, xmlFileTextMap = null) {
      try {
        const source = new Uint8Array(arrayBuffer);
        if (source[0] !== 0x50 || source[1] !== 0x4b) return null;
        if (!XLSX || typeof DOMParser !== 'function') return null;
        const suppliedFiles = xmlFileTextMap instanceof Map ? xmlFileTextMap : null;
        let files = [];
        let normalizedPaths = [];
        if (!suppliedFiles) {
          if (!XLSX.CFB || typeof XLSX.CFB.read !== 'function') return null;
          const cfb = XLSX.CFB.read(source, { type: 'array' });
          const paths = Array.isArray(cfb && cfb.FullPaths) ? cfb.FullPaths : [];
          files = Array.isArray(cfb && cfb.FileIndex) ? cfb.FileIndex : [];
          normalizedPaths = paths.map((path) => String(path || '')
            .replace(/\\/g, '/').toLowerCase());
        }
        const fileContent = (suffix) => {
          const normalized = String(suffix || '').replace(/^\/+/, '').toLowerCase();
          const index = normalizedPaths.findIndex((path) => path.endsWith(`/${normalized}`));
          return index >= 0 && files[index] ? files[index].content : null;
        };
        const decoder = new TextDecoder('utf-8');
        const fileText = (suffix) => {
          const normalized = String(suffix || '').replace(/^\/+/, '').toLowerCase();
          if (suppliedFiles) return String(suppliedFiles.get(normalized) || '');
          const content = fileContent(suffix);
          if (!content) return '';
          const bytes = content instanceof Uint8Array ? content : new Uint8Array(content);
          return decoder.decode(bytes).replace(/^\uFEFF/, '');
        };
        const parseXml = (text) => {
          if (!text) return null;
          const xml = new DOMParser().parseFromString(text, 'application/xml');
          if (!xml || xml.getElementsByTagName('parsererror').length) return null;
          return xml;
        };
        const localName = (node) => String(node && (node.localName || node.nodeName) || '')
          .replace(/^.*:/, '');
        const elementChildren = (node, name = '') => Array.from(node && node.childNodes || [])
          .filter((child) => child && child.nodeType === 1
            && (!name || localName(child) === name));
        const allDescendants = (node) => {
          if (!node) return [];
          if (typeof node.querySelectorAll === 'function') return Array.from(node.querySelectorAll('*'));
          if (typeof node.getElementsByTagName === 'function') {
            return Array.from(node.getElementsByTagName('*'));
          }
          return [];
        };
        const firstChild = (node, name) => elementChildren(node, name)[0] || null;
        const firstDescendant = (node, name) => allDescendants(node)
          .find((child) => localName(child) === name) || null;
        const attr = (node, name, fallback = '') => {
          if (!node || typeof node.getAttribute !== 'function') return fallback;
          const direct = node.getAttribute(name);
          if (direct != null) return direct;
          const attribute = Array.from(node.attributes || []).find((item) => localName(item) === name);
          return attribute ? attribute.value : fallback;
        };
        const boolElement = (node) => {
          if (!node) return false;
          const value = String(attr(node, 'val', '1')).toLowerCase();
          return !['0', 'false', 'off', 'none'].includes(value);
        };
        const stylesXml = parseXml(fileText('xl/styles.xml'));
        if (!stylesXml) return null;

        const palette = wpSpreadsheetDefaultPalette();
        const indexedColors = firstDescendant(stylesXml, 'indexedColors');
        if (indexedColors) {
          elementChildren(indexedColors, 'rgbColor').forEach((node, index) => {
            let value = String(attr(node, 'rgb', '')).replace(/^#/, '');
            if (value.length === 8) value = value.slice(2);
            if (/^[0-9a-f]{6}$/i.test(value)) palette.set(index, `#${value}`);
          });
        }

        const themeColors = [];
        const themeSlotIndexes = {
          lt1: 0, dk1: 1, lt2: 2, dk2: 3,
          accent1: 4, accent2: 5, accent3: 6, accent4: 7, accent5: 8, accent6: 9,
          hlink: 10, folhlink: 11,
        };
        const themeXml = parseXml(fileText('xl/theme/theme1.xml'));
        const colorScheme = themeXml && firstDescendant(themeXml, 'clrScheme');
        if (colorScheme) {
          elementChildren(colorScheme).forEach((slot) => {
            const colorNode = elementChildren(slot)[0];
            let value = String(attr(colorNode, 'val', '')).replace(/^#/, '');
            if (!/^[0-9a-f]{6,8}$/i.test(value)) {
              value = String(attr(colorNode, 'lastClr', '')).replace(/^#/, '');
            }
            if (value.length === 8) value = value.slice(2);
            const index = themeSlotIndexes[localName(slot).toLowerCase()];
            if (Number.isInteger(index) && /^[0-9a-f]{6}$/i.test(value)) {
              themeColors[index] = `#${value}`;
            }
          });
        }
        const tintColor = (hex, tintValue) => {
          const value = String(hex || '').replace(/^#/, '');
          const tint = Number(tintValue);
          if (!/^[0-9a-f]{6}$/i.test(value) || !Number.isFinite(tint) || tint === 0) return hex;
          const channels = [0, 2, 4].map((offset) => parseInt(value.slice(offset, offset + 2), 16));
          const adjusted = channels.map((channel) => Math.max(0, Math.min(255, Math.round(
            tint < 0 ? channel * (1 + tint) : channel * (1 - tint) + 255 * tint
          ))));
          return `#${adjusted.map((channel) => channel.toString(16).padStart(2, '0')).join('')}`;
        };
        const readColor = (node, fallback = '#000000') => {
          if (!node) return fallback;
          let value = String(attr(node, 'rgb', '')).replace(/^#/, '');
          if (value.length === 8) value = value.slice(2);
          let color = /^[0-9a-f]{6}$/i.test(value) ? `#${value}` : '';
          if (!color && attr(node, 'indexed', '') !== '') {
            color = palette.get(Number(attr(node, 'indexed', ''))) || '';
          }
          if (!color && attr(node, 'theme', '') !== '') {
            color = themeColors[Number(attr(node, 'theme', ''))] || '';
          }
          if (!color && boolElement(node) && attr(node, 'auto', '') !== '') color = fallback;
          return tintColor(color || fallback, attr(node, 'tint', '0'));
        };

        const stylesRoot = stylesXml.documentElement;
        const fontsRoot = firstChild(stylesRoot, 'fonts');
        const fonts = elementChildren(fontsRoot, 'font').map((fontNode) => {
          const nameNode = firstChild(fontNode, 'name') || firstChild(fontNode, 'rFont');
          const sizeNode = firstChild(fontNode, 'sz');
          const underlineNode = firstChild(fontNode, 'u');
          return {
            name: String(attr(nameNode, 'val', 'Calibri') || 'Calibri'),
            height: Math.max(1, Number(attr(sizeNode, 'val', '11')) || 11) * 20,
            colorIndex: readColor(firstChild(fontNode, 'color'), '#000000'),
            weight: boolElement(firstChild(fontNode, 'b')) ? 700 : 400,
            bold: boolElement(firstChild(fontNode, 'b')),
            italic: boolElement(firstChild(fontNode, 'i')),
            underline: underlineNode && String(attr(underlineNode, 'val', 'single')).toLowerCase() !== 'none' ? 1 : 0,
            strike: boolElement(firstChild(fontNode, 'strike')),
          };
        });
        if (!fonts.length) fonts.push({ name: 'Calibri', height: 220, weight: 400 });

        const fillsRoot = firstChild(stylesRoot, 'fills');
        const fills = elementChildren(fillsRoot, 'fill').map((fillNode) => {
          const pattern = firstChild(fillNode, 'patternFill');
          const patternType = String(attr(pattern, 'patternType', 'none')).toLowerCase();
          return {
            pattern: !pattern || ['none', 'gray125'].includes(patternType) ? 0 : 1,
            foreground: readColor(firstChild(pattern, 'fgColor'), '#ffffff'),
            background: readColor(firstChild(pattern, 'bgColor'), '#ffffff'),
          };
        });
        if (!fills.length) fills.push({ pattern: 0, foreground: '#ffffff', background: '#ffffff' });

        const bordersRoot = firstChild(stylesRoot, 'borders');
        const borders = elementChildren(bordersRoot, 'border').map((borderNode) => {
          const side = (name) => {
            const sideNode = firstChild(borderNode, name);
            return {
              style: String(attr(sideNode, 'style', '')).toLowerCase(),
              color: readColor(firstChild(sideNode, 'color'), '#000000'),
            };
          };
          const left = side('left');
          const right = side('right');
          const top = side('top');
          const bottom = side('bottom');
          return {
            leftStyle: left.style,
            rightStyle: right.style,
            topStyle: top.style,
            bottomStyle: bottom.style,
            leftColor: left.color,
            rightColor: right.color,
            topColor: top.color,
            bottomColor: bottom.color,
          };
        });
        if (!borders.length) borders.push({});

        const horizontalCodes = {
          left: 1, center: 2, right: 3, fill: 4, justify: 5,
          centercontinuous: 6, distributed: 7,
        };
        const verticalCodes = { top: 0, center: 1, bottom: 2, justify: 3, distributed: 4 };
        const readXfNode = (xfNode, base = null) => {
          const numberAttribute = (name, fallback) => attr(xfNode, name, '') !== ''
            ? Number(attr(xfNode, name, '0')) : fallback;
          const fontIndex = numberAttribute('fontId', base ? base.fontIndex : 0);
          const fillIndex = numberAttribute('fillId', base ? base.fillIndex : 0);
          const borderIndex = numberAttribute('borderId', base ? base.borderIndex : 0);
          const alignmentNode = firstChild(xfNode, 'alignment');
          const horizontalName = String(attr(alignmentNode, 'horizontal', '')).toLowerCase();
          const verticalName = String(attr(alignmentNode, 'vertical', '')).toLowerCase();
          return {
            fontIndex: Number.isInteger(fontIndex) ? fontIndex : 0,
            fillIndex: Number.isInteger(fillIndex) ? fillIndex : 0,
            borderIndex: Number.isInteger(borderIndex) ? borderIndex : 0,
            horizontal: horizontalName ? (horizontalCodes[horizontalName] || 0)
              : (base ? base.horizontal : 0),
            vertical: verticalName ? (verticalCodes[verticalName] ?? 2)
              : (base ? base.vertical : 2),
            wrap: alignmentNode
              ? ['1', 'true'].includes(String(attr(alignmentNode, 'wrapText', '0')).toLowerCase())
              : !!(base && base.wrap),
            rotation: alignmentNode ? Number(attr(alignmentNode, 'textRotation', '0')) || 0
              : Number(base && base.rotation) || 0,
            indent: alignmentNode ? Number(attr(alignmentNode, 'indent', '0')) || 0
              : Number(base && base.indent) || 0,
            shrink: alignmentNode ? ['1', 'true'].includes(String(attr(alignmentNode, 'shrinkToFit', '0')).toLowerCase())
              : !!(base && base.shrink),
          };
        };
        const styleXfsRoot = firstChild(stylesRoot, 'cellStyleXfs');
        const styleXfs = elementChildren(styleXfsRoot, 'xf').map((node) => readXfNode(node));
        const cellXfsRoot = firstChild(stylesRoot, 'cellXfs');
        const xfs = elementChildren(cellXfsRoot, 'xf').map((node) => {
          const base = styleXfs[Number(attr(node, 'xfId', '0'))] || null;
          const parsed = readXfNode(node, base);
          return {
            ...parsed,
            fontIndex: parsed.fontIndex,
            border: borders[parsed.borderIndex] || borders[0] || {},
            fill: fills[parsed.fillIndex] || fills[0] || {},
          };
        });
        if (!xfs.length) {
          xfs.push({ fontIndex: 0, horizontal: 0, vertical: 2, wrap: false, border: {}, fill: fills[0] });
        }

        const workbookXml = parseXml(fileText('xl/workbook.xml'));
        const relationshipsXml = parseXml(fileText('xl/_rels/workbook.xml.rels'));
        const relationshipTargets = new Map();
        if (relationshipsXml) {
          allDescendants(relationshipsXml).forEach((node) => {
            if (localName(node) !== 'Relationship') return;
            const id = String(attr(node, 'Id', ''));
            const target = String(attr(node, 'Target', '')).replace(/\\/g, '/');
            if (id && target) relationshipTargets.set(id, target);
          });
        }
        const workbookSheetNodes = workbookXml
          ? allDescendants(workbookXml).filter((node) => localName(node) === 'sheet')
          : [];
        const sheetPathByName = new Map();
        workbookSheetNodes.forEach((sheetNode) => {
          const name = String(attr(sheetNode, 'name', ''));
          const relationshipId = String(attr(sheetNode, 'id', ''));
          let target = String(relationshipTargets.get(relationshipId) || '');
          if (target.startsWith('/')) target = target.slice(1);
          else if (target && !/^xl\//i.test(target)) target = `xl/${target}`;
          target = target.replace(/\/\.\//g, '/').replace(/[^/]+\/\.\.\//g, '');
          if (name && target) sheetPathByName.set(name, target);
        });

        const sheetNames = Array.isArray(workbook && workbook.SheetNames)
          ? workbook.SheetNames : [];
        const sheets = sheetNames.map((sheetName, sheetIndex) => {
          const cellXfs = new Map();
          const rowXfs = new Map();
          const columnXfs = new Map();
          const rowDimensions = new Map();
          const columnDimensions = [];
          let defaultRowHeight = 15;
          let defaultColumnWidth = 8.43;
          let showGridLines = true;
          const target = sheetPathByName.get(sheetName) || `xl/worksheets/sheet${sheetIndex + 1}.xml`;
          const sheetXml = parseXml(fileText(target));
          if (sheetXml) {
            allDescendants(sheetXml).forEach((node) => {
              const name = localName(node);
              if (name === 'sheetFormatPr') {
                const rowHeight = Number(attr(node, 'defaultRowHeight', ''));
                const columnWidth = Number(attr(node, 'defaultColWidth', ''));
                const baseColumnWidth = Number(attr(node, 'baseColWidth', ''));
                if (rowHeight > 0) defaultRowHeight = rowHeight;
                if (columnWidth > 0) defaultColumnWidth = columnWidth;
                else if (baseColumnWidth > 0) defaultColumnWidth = baseColumnWidth;
              } else if (name === 'sheetView') {
                const rawGridLines = String(attr(node, 'showGridLines', '')).trim().toLowerCase();
                if (rawGridLines) {
                  showGridLines = !['0', 'false', 'off', 'none'].includes(rawGridLines);
                }
              } else if (name === 'c') {
                const address = String(attr(node, 'r', ''));
                const xfIndex = Number(attr(node, 's', '0')) || 0;
                if (!address) return;
                try {
                  const point = XLSX.utils.decode_cell(address.replace(/\$/g, ''));
                  cellXfs.set(`${point.r}:${point.c}`, xfIndex);
                } catch (_) {}
              } else if (name === 'row') {
                const rowIndex = Math.max(0, (Number(attr(node, 'r', '1')) || 1) - 1);
                if (attr(node, 's', '') !== '') {
                  rowXfs.set(rowIndex, Number(attr(node, 's', '0')) || 0);
                }
                const pointHeight = Number(attr(node, 'ht', ''));
                const hidden = ['1', 'true'].includes(
                  String(attr(node, 'hidden', '0')).toLowerCase()
                );
                if (pointHeight > 0 || hidden) {
                  rowDimensions.set(rowIndex, {
                    hpt:pointHeight > 0 ? pointHeight : 0,
                    hidden,
                  });
                }
              } else if (name === 'col') {
                const firstColumn = Math.max(0, (Number(attr(node, 'min', '1')) || 1) - 1);
                const lastColumn = Math.max(firstColumn, (Number(attr(node, 'max', '1')) || 1) - 1);
                if (attr(node, 'style', '') !== '') {
                  const xfIndex = Number(attr(node, 'style', '0')) || 0;
                  for (let columnIndex = firstColumn; columnIndex <= lastColumn; columnIndex += 1) {
                    columnXfs.set(columnIndex, xfIndex);
                  }
                }
                const width = Number(attr(node, 'width', ''));
                const hidden = ['1', 'true'].includes(
                  String(attr(node, 'hidden', '0')).toLowerCase()
                );
                if (width > 0 || hidden) {
                  columnDimensions.push({
                    min:firstColumn,
                    max:lastColumn,
                    width:width > 0 ? width : 0,
                    hidden,
                  });
                }
              }
            });
          }
          return {
            cellXfs, rowXfs, columnXfs, rowDimensions, columnDimensions,
            defaultRowHeight, defaultColumnWidth, showGridLines,
          };
        });
        return { fonts, xfs, sheets, palette, kind: 'xlsx' };
      } catch (_) {
        return null;
      }
    }

    async function wpReadSpreadsheetStyles(XLSX, arrayBuffer, workbook) {
      const legacy = wpReadLegacySpreadsheetStyles(XLSX, arrayBuffer);
      if (legacy) return legacy;
      let xmlFileTextMap = null;
      if (window.JSZip && typeof window.JSZip.loadAsync === 'function') {
        try {
          const zip = await window.JSZip.loadAsync(arrayBuffer);
          const paths = Object.keys(zip.files || {}).filter((path) => {
            const normalized = String(path || '').replace(/^\/+/, '').toLowerCase();
            return normalized === 'xl/styles.xml'
              || normalized === 'xl/workbook.xml'
              || normalized === 'xl/_rels/workbook.xml.rels'
              || /^xl\/theme\/theme\d+\.xml$/.test(normalized)
              || /^xl\/worksheets\/sheet\d+\.xml$/.test(normalized);
          });
          const entries = await Promise.all(paths.map(async (path) => {
            const entry = zip.file(path);
            const text = entry ? await entry.async('string') : '';
            return [String(path || '').replace(/^\/+/, '').toLowerCase(), text];
          }));
          xmlFileTextMap = new Map(entries);
        } catch (_) {
          xmlFileTextMap = null;
        }
      }
      return wpReadOpenXmlSpreadsheetStyles(
        XLSX, arrayBuffer, workbook, xmlFileTextMap
      );
    }

    function wpLegacySpreadsheetXf(styleBook, sheetIndex, rowIndex, columnIndex) {
      if (!styleBook || !Array.isArray(styleBook.sheets) || !Array.isArray(styleBook.xfs)) return null;
      const sheetStyle = styleBook.sheets[sheetIndex];
      if (!sheetStyle) return null;
      let xfIndex = sheetStyle.cellXfs.get(`${rowIndex}:${columnIndex}`);
      if (!Number.isInteger(xfIndex)) xfIndex = sheetStyle.rowXfs.get(rowIndex);
      if (!Number.isInteger(xfIndex)) xfIndex = sheetStyle.columnXfs.get(columnIndex);
      if (!Number.isInteger(xfIndex)) xfIndex = 0;
      return styleBook.xfs[xfIndex] || null;
    }

    function wpSpreadsheetIndexedColor(styleBook, colorIndex, fallback) {
      const direct = String(colorIndex == null ? '' : colorIndex).trim();
      if (/^#[0-9a-f]{6}$/i.test(direct)) return direct;
      if (/^[0-9a-f]{6}$/i.test(direct)) return `#${direct}`;
      const index = Number(colorIndex);
      if (index === 32767 || index === 64) return fallback || '#000000';
      if (index === 65) return fallback || '#ffffff';
      const value = styleBook && styleBook.palette instanceof Map && styleBook.palette.get(index);
      return value || fallback || '#000000';
    }

    function wpSpreadsheetLegacyBorder(styleBook, styleCode, colorIndex) {
      const rawStyle = String(styleCode == null ? '' : styleCode).trim().toLowerCase();
      if (!rawStyle || rawStyle === 'none') return '';
      if (rawStyle && !/^\d+$/.test(rawStyle)) {
        const width = rawStyle === 'thick' ? 3
          : (rawStyle === 'double' || rawStyle.startsWith('medium') ? 2 : 1);
        const line = rawStyle === 'double' ? 'double'
          : (rawStyle.includes('dash') || rawStyle.includes('slant') ? 'dashed'
            : (rawStyle.includes('dot') || rawStyle === 'hair' ? 'dotted' : 'solid'));
        return `${width}px ${line} ${wpSpreadsheetIndexedColor(styleBook, colorIndex, '#000000')}`;
      }
      const code = Number(rawStyle) || 0;
      if (!code) return '';
      const width = [2, 5, 6].includes(code) ? (code === 5 ? 3 : 2)
        : ([8, 10, 12, 13].includes(code) ? 2 : 1);
      const line = code === 6 ? 'double'
        : ([3, 8, 9, 10, 11, 12, 13].includes(code) ? 'dashed'
          : (code === 4 || code === 7 ? 'dotted' : 'solid'));
      return `${width}px ${line} ${wpSpreadsheetIndexedColor(styleBook, colorIndex, '#000000')}`;
    }

    function wpApplyLegacySpreadsheetStyle(element, cell, styleBook, xf) {
      if (!(element instanceof HTMLElement) || !styleBook || !xf) return;
      const font = styleBook.fonts[xf.fontIndex] || {};
      const fontSizePt = Math.max(1, Number(font.height) || 220) / 20;
      element.style.fontFamily = `"${String(font.name || 'Arial').replace(/"/g, '')}", Arial, sans-serif`;
      element.style.fontSize = `${fontSizePt * 96 / 72}px`;
      element.style.fontWeight = font.bold || Number(font.weight) >= 700 ? '700' : '400';
      element.style.fontStyle = font.italic ? 'italic' : 'normal';
      const decorations = [];
      if (font.underline) decorations.push('underline');
      if (font.strike) decorations.push('line-through');
      element.style.textDecoration = decorations.length ? decorations.join(' ') : 'none';
      element.style.color = wpSpreadsheetIndexedColor(styleBook, font.colorIndex, '#000000');

      const horizontal = { 1: 'left', 2: 'center', 3: 'right', 5: 'justify', 6: 'center', 7: 'justify' };
      if (horizontal[xf.horizontal]) element.style.textAlign = horizontal[xf.horizontal];
      else if (cell && ['n', 'd'].includes(String(cell.t || ''))) element.style.textAlign = 'right';
      else element.style.textAlign = 'left';
      const vertical = { 0: 'top', 1: 'middle', 2: 'bottom', 3: 'middle', 4: 'middle' };
      element.style.verticalAlign = vertical[xf.vertical] || 'bottom';
      if (xf.wrap) {
        element.style.whiteSpace = 'pre-wrap';
        element.style.overflowWrap = 'break-word';
      } else {
        element.style.whiteSpace = 'nowrap';
        element.style.overflowWrap = 'normal';
      }
      if (Number(xf.indent) > 0) element.style.paddingLeft = `${4 + Number(xf.indent) * 8}px`;

      const border = xf.border || {};
      const sides = [
        ['left', border.leftStyle, border.leftColor],
        ['right', border.rightStyle, border.rightColor],
        ['top', border.topStyle, border.topColor],
        ['bottom', border.bottomStyle, border.bottomColor],
      ];
      sides.forEach(([side, styleCode, colorIndex]) => {
        const value = wpSpreadsheetLegacyBorder(styleBook, styleCode, colorIndex);
        element.style.setProperty(`border-${side}`, value || 'none');
      });
      const fill = xf.fill || {};
      if (Number(fill.pattern) > 0) {
        element.style.backgroundColor = wpSpreadsheetIndexedColor(
          styleBook, fill.foreground, wpSpreadsheetIndexedColor(styleBook, fill.background, '#ffffff')
        );
      } else {
        element.style.backgroundColor = '#ffffff';
      }
    }

    function wpApplyLegacySpreadsheetMergedBorders(element, styleBook, sheetIndex,
      rowIndex, columnIndex, merge) {
      if (!(element instanceof HTMLElement) || !merge) return;
      const endRow = rowIndex + Math.max(1, Number(merge.rowSpan) || 1) - 1;
      const endColumn = columnIndex + Math.max(1, Number(merge.colSpan) || 1) - 1;
      const edgeCells = {
        left: [rowIndex, columnIndex],
        right: [rowIndex, endColumn],
        top: [rowIndex, columnIndex],
        bottom: [endRow, columnIndex],
      };
      Object.entries(edgeCells).forEach(([side, point]) => {
        const xf = wpLegacySpreadsheetXf(styleBook, sheetIndex, point[0], point[1]);
        const border = xf && xf.border;
        if (!border) return;
        const styleCode = border[`${side}Style`];
        const colorIndex = border[`${side}Color`];
        const value = wpSpreadsheetLegacyBorder(styleBook, styleCode, colorIndex);
        if (value) element.style.setProperty(`border-${side}`, value);
      });
    }

    function wpSpreadsheetDigitWidth(styleBook) {
      let fallback = 7;
      try {
        const defaultXf = styleBook && styleBook.xfs && styleBook.xfs[0];
        const font = defaultXf && styleBook.fonts && styleBook.fonts[defaultXf.fontIndex];
        if (!font) return fallback;
        const canvas = document.createElement('canvas');
        const context = canvas.getContext('2d');
        if (!context) return fallback;
        const sizePx = Math.max(1, Number(font.height) || 220) / 20 * 96 / 72;
        context.font = `${font.italic ? 'italic ' : ''}${font.bold ? '700 ' : '400 '}${sizePx}px "${String(font.name || 'Arial').replace(/"/g, '')}"`;
        fallback = Number(context.measureText('0').width) || fallback;
      } catch (_) {}
      return Math.max(5, Math.min(12, fallback));
    }

    function wpSpreadsheetUsedRange(XLSX, sheet) {
      let minRow = Infinity;
      let minColumn = Infinity;
      let maxRow = -1;
      let maxColumn = -1;
      Object.keys(sheet || {}).forEach((address) => {
        if (!address || address[0] === '!') return;
        const cell = sheet[address];
        /* Một số file XLS cũ lưu định dạng ở rất nhiều ô trống phía ngoài
           bảng thật. Không tính các ô chỉ có style vào vùng trình chiếu,
           nếu không trang tính sẽ bị kéo rộng tới các cột trống. */
        const hasValue = !!cell && cell.v != null && String(cell.v) !== '';
        const hasFormula = !!cell && typeof cell.f === 'string' && cell.f.trim() !== '';
        const hasDisplay = !!cell && cell.w != null && String(cell.w) !== '';
        if (!hasValue && !hasFormula && !hasDisplay) return;
        try {
          const point = XLSX.utils.decode_cell(address);
          if (!Number.isInteger(point.r) || !Number.isInteger(point.c)) return;
          minRow = Math.min(minRow, point.r);
          minColumn = Math.min(minColumn, point.c);
          maxRow = Math.max(maxRow, point.r);
          maxColumn = Math.max(maxColumn, point.c);
        } catch (_) {}
      });
      (Array.isArray(sheet && sheet['!merges']) ? sheet['!merges'] : []).forEach((merge) => {
        if (!merge || !merge.s || !merge.e) return;
        minRow = Math.min(minRow, Number(merge.s.r) || 0);
        minColumn = Math.min(minColumn, Number(merge.s.c) || 0);
        maxRow = Math.max(maxRow, Number(merge.e.r) || 0);
        maxColumn = Math.max(maxColumn, Number(merge.e.c) || 0);
      });
      if (maxRow < 0 || maxColumn < 0) {
        try {
          const fallback = XLSX.utils.decode_range(String(sheet && sheet['!ref'] || 'A1'));
          return fallback;
        } catch (_) {
          return { s: { r: 0, c: 0 }, e: { r: 0, c: 0 } };
        }
      }
      return {
        s: { r: Math.max(0, minRow), c: Math.max(0, minColumn) },
        e: { r: Math.max(0, maxRow), c: Math.max(0, maxColumn) },
      };
    }

    function wpSpreadsheetColor(color) {
      let value = String(color && (color.rgb || color.argb) || '').replace(/^#/, '').trim();
      if (value.length === 8) value = value.slice(2);
      return /^[0-9a-f]{6}$/i.test(value) ? `#${value}` : '';
    }

    function wpSpreadsheetColumnWidth(columnInfo, digitWidth = 7, defaultColumnWidth = 8.43) {
      if (columnInfo && columnInfo.hidden) return 0;
      /* Khi SheetJS đã quy đổi được wpx thì đây là số pixel sát Excel nhất.
         Chỉ tự quy đổi từ width/wch khi file không cung cấp wpx. */
      const pixelWidth = Number(columnInfo && columnInfo.wpx);
      if (pixelWidth > 0) return Math.max(8, pixelWidth);
      const excelWidth = Number(columnInfo && columnInfo.width);
      if (excelWidth > 0) return Math.max(8, excelWidth * digitWidth + 5);
      const characterWidth = Number(columnInfo && columnInfo.wch);
      if (characterWidth > 0) return Math.max(8, characterWidth * digitWidth + 5);
      const fallbackWidth = Number(defaultColumnWidth);
      if (fallbackWidth > 0) return Math.max(8, fallbackWidth * digitWidth + 5);
      return 64;
    }

    function wpSpreadsheetRowHeight(rowInfo, defaultRowHeight = 15) {
      if (rowInfo && rowInfo.hidden) return 0;
      const pointHeight = Number(rowInfo && rowInfo.hpt);
      if (pointHeight > 0) return Math.max(8, pointHeight * 96 / 72);
      const pixelHeight = Number(rowInfo && rowInfo.hpx);
      if (pixelHeight > 0) return Math.max(8, pixelHeight);
      const fallbackHeight = Number(defaultRowHeight);
      return fallbackHeight > 0 ? Math.max(8, fallbackHeight * 96 / 72) : 20;
    }

    function wpSpreadsheetSourceColumnInfo(sheetStyle, columnIndex, fallback) {
      const runs = sheetStyle && Array.isArray(sheetStyle.columnDimensions)
        ? sheetStyle.columnDimensions : [];
      for (let index = runs.length - 1; index >= 0; index -= 1) {
        const run = runs[index];
        if (!run || columnIndex < Number(run.min) || columnIndex > Number(run.max)) continue;
        return {
          ...(fallback && typeof fallback === 'object' ? fallback : {}),
          width:Number(run.width) > 0 ? Number(run.width) : undefined,
          wpx:undefined,
          wch:undefined,
          hidden:!!run.hidden,
        };
      }
      return fallback;
    }

    function wpSpreadsheetSourceRowInfo(sheetStyle, rowIndex, fallback) {
      const rows = sheetStyle && sheetStyle.rowDimensions instanceof Map
        ? sheetStyle.rowDimensions : null;
      const source = rows && rows.get(rowIndex);
      if (!source) return fallback;
      return {
        ...(fallback && typeof fallback === 'object' ? fallback : {}),
        hpt:Number(source.hpt) > 0 ? Number(source.hpt) : undefined,
        hpx:undefined,
        hidden:!!source.hidden,
      };
    }

    function wpSpreadsheetBorderStyle(side) {
      const styleName = String(side && side.style || '').toLowerCase();
      if (!styleName || styleName === 'none') return '';
      const width = ['medium', 'mediumdashed', 'mediumdashdot', 'mediumdashdotdot'].includes(styleName)
        ? 2 : (['thick', 'double'].includes(styleName) ? 3 : 1);
      const line = styleName.includes('dash') ? 'dashed'
        : (styleName.includes('dot') ? 'dotted' : (styleName === 'double' ? 'double' : 'solid'));
      return `${width}px ${line} ${wpSpreadsheetColor(side && side.color) || '#111827'}`;
    }

    function wpApplySpreadsheetCellStyle(element, cell) {
      if (!(element instanceof HTMLElement) || !cell) return;
      const style = cell.s && typeof cell.s === 'object' ? cell.s : {};
      const alignment = style.alignment && typeof style.alignment === 'object' ? style.alignment : {};
      const font = style.font && typeof style.font === 'object' ? style.font : {};
      const fill = style.fill && typeof style.fill === 'object' ? style.fill : {};
      const border = style.border && typeof style.border === 'object' ? style.border : {};
      const horizontal = String(alignment.horizontal || '').toLowerCase();
      const vertical = String(alignment.vertical || '').toLowerCase();
      if (['left', 'center', 'right', 'justify'].includes(horizontal)) element.style.textAlign = horizontal;
      if (vertical === 'center') element.style.verticalAlign = 'middle';
      else if (['top', 'bottom'].includes(vertical)) element.style.verticalAlign = vertical;
      const textValue = String(cell.w != null ? cell.w : (cell.v != null ? cell.v : ''));
      if (alignment.wrapText || /[\r\n]/.test(textValue)) {
        element.style.whiteSpace = 'pre-wrap';
        element.style.overflowWrap = 'break-word';
      }
      if (font.name) element.style.fontFamily = `"${String(font.name).replace(/"/g, '')}", Arial, sans-serif`;
      if (Number(font.sz) > 0) element.style.fontSize = `${Number(font.sz) * 96 / 72}px`;
      if (font.bold) element.style.fontWeight = '700';
      if (font.italic) element.style.fontStyle = 'italic';
      if (font.underline) element.style.textDecoration = 'underline';
      const fontColor = wpSpreadsheetColor(font.color);
      if (fontColor) element.style.color = fontColor;
      const fillColor = wpSpreadsheetColor(fill.fgColor) || wpSpreadsheetColor(fill.bgColor);
      if (fillColor && String(fill.patternType || 'solid').toLowerCase() !== 'none') {
        element.style.backgroundColor = fillColor;
      }
      ['left', 'right', 'top', 'bottom'].forEach((sideName) => {
        const borderValue = wpSpreadsheetBorderStyle(border[sideName]);
        if (borderValue) element.style.setProperty(`border-${sideName}`, borderValue);
      });
    }

    function wpSpreadsheetCellBlocksTextOverflow(XLSX, sheet, rowIndex,
      columnIndex, mergeStarts, mergeCovered) {
      const key = `${rowIndex}:${columnIndex}`;
      if (mergeStarts.has(key) || mergeCovered.has(key)) return true;
      let cell = null;
      try {
        const address = XLSX.utils.encode_cell({ r:rowIndex, c:columnIndex });
        cell = sheet && sheet[address];
      } catch (_) {}
      if (!cell) return false;
      if (cell.v != null && String(cell.v) !== '') return true;
      if (typeof cell.f === 'string' && cell.f.trim() !== '') return true;
      return cell.w != null && String(cell.w) !== '';
    }

    function wpSpreadsheetTextOverflowWidth(XLSX, sheet, range, rowIndex,
      columnIndex, cell, element, merge, columnMetrics, mergeStarts, mergeCovered) {
      if (!cell || merge || !(element instanceof HTMLElement)) return 0;
      /* Excel chỉ cho văn bản tràn qua ô trống; số vẫn nằm trong ô của nó. */
      const isText = String(cell.t || '').toLowerCase() === 's'
        || typeof cell.v === 'string';
      if (!isText) return 0;
      const whiteSpace = String(element.style.whiteSpace || 'nowrap').toLowerCase();
      if (whiteSpace !== 'nowrap') return 0;
      const ownOffset = columnIndex - range.s.c;
      const ownWidth = Number(columnMetrics[ownOffset]) || 0;
      if (ownWidth <= 0) return 0;
      const horizontal = String(element.style.textAlign || 'left').toLowerCase();
      const collect = (direction) => {
        let width = 0;
        for (let scanColumn = columnIndex + direction;
          scanColumn >= range.s.c && scanColumn <= range.e.c;
          scanColumn += direction) {
          if (wpSpreadsheetCellBlocksTextOverflow(
            XLSX, sheet, rowIndex, scanColumn, mergeStarts, mergeCovered
          )) break;
          width += Number(columnMetrics[scanColumn - range.s.c]) || 0;
        }
        return width;
      };
      if (horizontal === 'right') return ownWidth + collect(-1);
      if (horizontal === 'center') {
        const symmetricRoom = Math.min(collect(-1), collect(1));
        return ownWidth + symmetricRoom * 2;
      }
      return ownWidth + collect(1);
    }

    function wpFinalizeSpreadsheetGridCell(element, overflowWidth = 0,
      lockedCellHeight = 0) {
      if (!(element instanceof HTMLElement)) return;
      const whiteSpace = String(element.style.whiteSpace || 'nowrap').toLowerCase();
      const isWrappedText = whiteSpace !== 'nowrap';
      if (isWrappedText) {
        /* Excel gần như không chừa đệm dọc cho ô xuống dòng. Với Times New
           Roman 10 pt, khoảng dòng 1.05 cho đúng hai dòng trong hàng 23.25 pt. */
        element.style.paddingTop = '0px';
        element.style.paddingBottom = '0px';
        element.style.lineHeight = '1.05';
      }
      const vertical = String(element.style.verticalAlign || '').toLowerCase();
      element.style.alignItems = vertical === 'top' ? 'flex-start'
        : (vertical === 'bottom' ? 'flex-end' : 'center');
      const horizontal = String(element.style.textAlign || '').toLowerCase();
      element.style.justifyContent = horizontal === 'right' ? 'flex-end'
        : (horizontal === 'center' ? 'center' : 'flex-start');
      const content = document.createElement('span');
      content.className = 'ordinary-xlsx-cell-content';
      while (element.firstChild) content.appendChild(element.firstChild);
      element.appendChild(content);
      const cellHeight = Number(lockedCellHeight) || 0;
      if (cellHeight > 0 && isWrappedText) {
        /* Khi văn bản xuống nhiều dòng hơn chiều cao hàng, Excel giữ dòng đầu
           và cắt phần dưới. Giới hạn chính khối nội dung trước khi căn dọc để
           tránh flex căn giữa một khối quá cao rồi làm mất các dòng đầu. */
        const topPadding = parseFloat(element.style.paddingTop);
        const bottomPadding = parseFloat(element.style.paddingBottom);
        const verticalPadding = (Number.isFinite(topPadding) ? topPadding : 2)
          + (Number.isFinite(bottomPadding) ? bottomPadding : 2);
        const verticalBorder = (parseFloat(element.style.borderTopWidth) || 0)
          + (parseFloat(element.style.borderBottomWidth) || 0);
        content.style.maxHeight = `${Math.max(
          1, cellHeight - verticalPadding - verticalBorder
        )}px`;
      } else if (!isWrappedText) {
        /* Ô một dòng (đặc biệt là ô điểm số hẹp) không được giới hạn theo
           content-box sau khi đã trừ padding và border. Giới hạn cũ có thể
           chỉ còn 10–12 px trong hàng cao 15 pt, làm mất dấu thập phân và
           phần dưới của các chữ số. Khung ô cha vẫn cắt đúng theo chiều cao
           hàng, còn line-height normal giữ toàn bộ nét chữ như Excel. */
        content.style.maxHeight = 'none';
        content.style.overflow = 'visible';
        content.style.lineHeight = 'normal';
      }
      const availableWidth = Number(overflowWidth) || 0;
      if (availableWidth > 0) {
        /* Ô còn đang rời DOM nên lấy padding trực tiếp từ style; mặc định CSS
           của ô Excel là 4 px mỗi phía. */
        const horizontalPadding = (parseFloat(element.style.paddingLeft) || 4)
          + (parseFloat(element.style.paddingRight) || 4);
        content.style.width = `${Math.max(1, availableWidth - horizontalPadding)}px`;
        element.classList.add('is-xlsx-text-overflow');
      }
    }

    function wpSpreadsheetRelationshipMap(documentXml) {
      const result = new Map();
      wpOfficeXmlElements(documentXml, 'relationship').forEach((node) => {
        const id = String(wpOfficeXmlAttr(node, 'Id', wpOfficeXmlAttr(node, 'id', ''))).trim();
        const target = String(wpOfficeXmlAttr(node, 'Target', wpOfficeXmlAttr(node, 'target', ''))).trim();
        if (id && target) result.set(id, {
          target,
          type:String(wpOfficeXmlAttr(node, 'Type', wpOfficeXmlAttr(node, 'type', ''))),
          targetMode:String(wpOfficeXmlAttr(node, 'TargetMode', wpOfficeXmlAttr(node, 'targetMode', ''))),
        });
      });
      return result;
    }

    function wpSpreadsheetRelationshipPartPath(packagePath) {
      const normalized = String(packagePath || '').replace(/^\/+/, '').replace(/\\/g, '/');
      const parts = normalized.split('/');
      const fileName = parts.pop() || '';
      return `${parts.join('/')}/_rels/${fileName}.rels`.replace(/^\//, '');
    }

    function wpSpreadsheetAnchorPoint(anchorNode, name) {
      const point = wpOfficeXmlChildren(anchorNode, name)[0];
      if (!point) return null;
      const text = (childName) => {
        const child = wpOfficeXmlChildren(point, childName)[0];
        return wpOfficeNumber(child && child.textContent);
      };
      return {
        col:Math.max(0, Math.floor(text('col'))),
        row:Math.max(0, Math.floor(text('row'))),
        colOff:text('coloff'),
        rowOff:text('rowoff'),
      };
    }

    function wpSpreadsheetAnchorPlan(anchorNode) {
      const type = wpOfficeLocalName(anchorNode);
      const from = wpSpreadsheetAnchorPoint(anchorNode, 'from');
      const to = wpSpreadsheetAnchorPoint(anchorNode, 'to');
      const position = wpOfficeXmlChildren(anchorNode, 'pos')[0];
      const extent = wpOfficeXmlChildren(anchorNode, 'ext')[0];
      return {
        type,
        from,
        to,
        x:wpOfficeNumber(wpOfficeXmlAttr(position, 'x', '')),
        y:wpOfficeNumber(wpOfficeXmlAttr(position, 'y', '')),
        cx:wpOfficeNumber(wpOfficeXmlAttr(extent, 'cx', '')),
        cy:wpOfficeNumber(wpOfficeXmlAttr(extent, 'cy', '')),
      };
    }

    function wpOfficeShapeGroupPlanFromNode(groupNode, themeColors = null) {
      if (!(groupNode instanceof Element)) return null;
      const groupProperties = wpOfficeXmlChildren(groupNode, 'grpsppr')[0];
      const transform = groupProperties && wpOfficeXmlChildren(groupProperties, 'xfrm')[0];
      const childOffset = transform && wpOfficeXmlChildren(transform, 'choff')[0];
      const childExtent = transform && wpOfficeXmlChildren(transform, 'chext')[0];
      const chX = wpOfficeNumber(wpOfficeXmlAttr(childOffset, 'x', ''));
      const chY = wpOfficeNumber(wpOfficeXmlAttr(childOffset, 'y', ''));
      const chCx = Math.max(1, wpOfficeNumber(wpOfficeXmlAttr(childExtent, 'cx', '1'), 1));
      const chCy = Math.max(1, wpOfficeNumber(wpOfficeXmlAttr(childExtent, 'cy', '1'), 1));
      const children = wpOfficeXmlChildren(groupNode).filter((node) =>
        ['sp', 'cxnsp', 'grpsp'].includes(wpOfficeLocalName(node))
      ).map((shapeNode) => {
        const isGroup = wpOfficeLocalName(shapeNode) === 'grpsp';
        const plan = isGroup ? null : wpOfficeShapePlanFromNode(shapeNode, themeColors);
        const groupPlan = isGroup ? wpOfficeShapeGroupPlanFromNode(shapeNode, themeColors) : null;
        const propertyName = isGroup ? 'grpsppr' : 'sppr';
        const shapeProperties = wpOfficeXmlChildren(shapeNode, propertyName)[0]
          || wpOfficeXmlElements(shapeNode, propertyName)[0];
        const shapeTransform = shapeProperties
          ? (wpOfficeXmlChildren(shapeProperties, 'xfrm')[0]
            || wpOfficeXmlElements(shapeProperties, 'xfrm')[0]) : null;
        const off = shapeTransform && wpOfficeXmlChildren(shapeTransform, 'off')[0];
        const ext = shapeTransform && wpOfficeXmlChildren(shapeTransform, 'ext')[0];
        return {
          plan,
          groupPlan,
          x:(wpOfficeNumber(wpOfficeXmlAttr(off, 'x', '')) - chX) / chCx * 1000,
          y:(wpOfficeNumber(wpOfficeXmlAttr(off, 'y', '')) - chY) / chCy * 1000,
          width:Math.max(1, wpOfficeNumber(wpOfficeXmlAttr(ext, 'cx', '')) / chCx * 1000),
          height:Math.max(1, wpOfficeNumber(wpOfficeXmlAttr(ext, 'cy', '')) / chCy * 1000),
        };
      }).filter((item) => item.plan || item.groupPlan);
      return children.length ? { children } : null;
    }

    function wpOfficeShapeGroupSvgElement(groupPlan) {
      const ns = 'http://www.w3.org/2000/svg';
      const svg = document.createElementNS(ns, 'svg');
      svg.classList.add('mvip-office-vector-group');
      svg.dataset.officeObjectKind = 'shape-group';
      svg.setAttribute('viewBox', '0 0 1000 1000');
      svg.setAttribute('preserveAspectRatio', 'none');
      svg.setAttribute('role', 'group');
      svg.setAttribute('aria-label', 'Nhóm hình vẽ Office');
      (Array.isArray(groupPlan && groupPlan.children) ? groupPlan.children : []).forEach((child) => {
        const childSvg = child.groupPlan
          ? wpOfficeShapeGroupSvgElement(child.groupPlan)
          : wpOfficeShapeSvgElement(child.plan, 'Thành phần hình vẽ Office');
        childSvg.setAttribute('x', String(child.x));
        childSvg.setAttribute('y', String(child.y));
        childSvg.setAttribute('width', String(child.width));
        childSvg.setAttribute('height', String(child.height));
        svg.appendChild(childSvg);
      });
      return svg;
    }

    async function wpReadSpreadsheetDrawingObjects(arrayBuffer, sheetNames) {
      const bySheet = new Map();
      if (!window.JSZip || !(arrayBuffer instanceof ArrayBuffer)) return bySheet;
      try {
        const zip = await window.JSZip.loadAsync(arrayBuffer);
        const parser = new DOMParser();
        const pathLookup = new Map(Object.keys(zip.files || {}).map((path) => [
          String(path || '').replace(/^\/+/, '').toLowerCase(), path,
        ]));
        const entryAt = (path) => {
          const normalized = String(path || '').replace(/^\/+/, '');
          return zip.file(normalized) || zip.file(pathLookup.get(normalized.toLowerCase()) || '');
        };
        const xmlAt = async (path) => {
          const entry = entryAt(path);
          if (!entry) return null;
          const doc = parser.parseFromString(await entry.async('string'), 'application/xml');
          return doc.getElementsByTagName('parsererror').length ? null : doc;
        };
        const officeThemeColors = wpOfficeThemeColors(await xmlAt('xl/theme/theme1.xml'));
        const workbookDoc = await xmlAt('xl/workbook.xml');
        const workbookRels = wpSpreadsheetRelationshipMap(
          await xmlAt('xl/_rels/workbook.xml.rels')
        );
        if (!workbookDoc) return bySheet;
        const worksheetPathByName = new Map();
        wpOfficeXmlElements(workbookDoc, 'sheet').forEach((sheetNode, index) => {
          const name = String(wpOfficeXmlAttr(sheetNode, 'name', sheetNames[index] || '')).trim();
          const relationshipId = String(wpOfficeXmlAttr(sheetNode, 'id', '')).trim();
          const relationship = workbookRels.get(relationshipId);
          if (name && relationship) {
            worksheetPathByName.set(name, wpPptxPackagePath('xl/workbook.xml', relationship.target));
          }
        });
        const objectUrlCache = new Map();
        for (const sheetName of (Array.isArray(sheetNames) ? sheetNames : [])) {
          const worksheetPath = worksheetPathByName.get(sheetName);
          if (!worksheetPath) continue;
          const worksheetDoc = await xmlAt(worksheetPath);
          const worksheetRels = wpSpreadsheetRelationshipMap(
            await xmlAt(wpSpreadsheetRelationshipPartPath(worksheetPath))
          );
          if (!worksheetDoc) continue;
          const drawingReference = wpOfficeXmlElements(worksheetDoc, 'drawing')[0]
            || wpOfficeXmlElements(worksheetDoc, 'legacydrawing')[0];
          const drawingRelationshipId = String(wpOfficeXmlAttr(drawingReference, 'id', '')).trim();
          const drawingRelationship = worksheetRels.get(drawingRelationshipId);
          if (!drawingRelationship) continue;
          const drawingPath = wpPptxPackagePath(worksheetPath, drawingRelationship.target);
          const drawingDoc = await xmlAt(drawingPath);
          const drawingRels = wpSpreadsheetRelationshipMap(
            await xmlAt(wpSpreadsheetRelationshipPartPath(drawingPath))
          );
          if (!drawingDoc) continue;
          const plans = [];
          const anchors = wpOfficeXmlElements(drawingDoc).filter((node) =>
            ['twocellanchor', 'onecellanchor', 'absoluteanchor'].includes(wpOfficeLocalName(node))
          );
          for (let index = 0; index < anchors.length; index += 1) {
            const anchorNode = anchors[index];
            const directObject = wpOfficeXmlChildren(anchorNode).find((node) =>
              ['pic', 'sp', 'cxnsp', 'grpsp', 'graphicframe'].includes(wpOfficeLocalName(node))
            );
            const alternateContent = wpOfficeXmlChildren(anchorNode, 'alternatecontent')[0];
            const preferredBranch = alternateContent
              ? (wpOfficeXmlChildren(alternateContent, 'choice')[0]
                || wpOfficeXmlChildren(alternateContent, 'fallback')[0]) : null;
            const objectNode = directObject || (preferredBranch
              && wpOfficeXmlElements(preferredBranch).find((node) =>
                ['pic', 'sp', 'cxnsp', 'grpsp', 'graphicframe'].includes(wpOfficeLocalName(node))
              ));
            if (!objectNode) continue;
            const base = {
              anchor:wpSpreadsheetAnchorPlan(anchorNode),
              zIndex:index + 1,
              rotation:0,
              hyperlink:(() => {
                const hlink = wpOfficeXmlElements(objectNode, 'hlinkclick')[0];
                const rel = drawingRels.get(String(wpOfficeXmlAttr(hlink, 'id', '')));
                return rel && /hyperlink$/i.test(rel.type) ? mvipSafeHyperlink(rel.target) : '';
              })(),
            };
            const objectType = wpOfficeLocalName(objectNode);
            if (objectType === 'pic') {
              const blip = wpOfficeXmlElements(objectNode, 'blip')[0];
              const relationshipId = String(wpOfficeXmlAttr(blip, 'embed', '')).trim();
              const relationship = drawingRels.get(relationshipId);
              if (!relationship || /^external$/i.test(relationship.targetMode)) continue;
              const imagePath = wpPptxPackagePath(drawingPath, relationship.target);
              const src = await wpOfficeObjectUrl(zip, imagePath, objectUrlCache);
              if (src) plans.push(Object.assign(base, { type:'image', src }));
            } else if (objectType === 'sp' || objectType === 'cxnsp') {
              const shapePlan = wpOfficeShapePlanFromNode(objectNode, officeThemeColors);
              if (shapePlan) plans.push(Object.assign(base, {
                type:'shape', shapePlan, rotation:wpOfficeNumber(shapePlan.rotation),
              }));
            } else if (objectType === 'grpsp') {
              const groupPlan = wpOfficeShapeGroupPlanFromNode(objectNode, officeThemeColors);
              if (groupPlan) plans.push(Object.assign(base, { type:'shape-group', groupPlan }));
            } else if (objectType === 'graphicframe') {
              const chartNode = wpOfficeXmlElements(objectNode, 'chart')[0];
              const relationshipId = String(wpOfficeXmlAttr(chartNode, 'id', '')).trim();
              const relationship = drawingRels.get(relationshipId);
              if (!relationship) continue;
              const chartPath = wpPptxPackagePath(drawingPath, relationship.target);
              const chartDoc = await xmlAt(chartPath);
              const chartPlan = wpOfficeChartPlanFromXml(chartDoc, officeThemeColors)
                || wpOfficeChartExPlanFromXml(chartDoc, officeThemeColors);
              if (chartPlan) plans.push(Object.assign(base, { type:'chart', chartPlan }));
            }
          }
          if (plans.length) bySheet.set(sheetName, plans);
        }
      } catch (error) {
        console.warn('Không đọc được một số đối tượng nổi trong Excel:', error);
      }
      return bySheet;
    }

    async function wpReadSpreadsheetTablePlans(arrayBuffer, sheetNames) {
      const bySheet = new Map();
      if (!window.JSZip || !(arrayBuffer instanceof ArrayBuffer)) return bySheet;
      try {
        const zip = await window.JSZip.loadAsync(arrayBuffer);
        const parser = new DOMParser();
        const paths = new Map(Object.keys(zip.files || {}).map((path) => [
          String(path || '').replace(/^\/+/, '').toLowerCase(), path,
        ]));
        const xmlAt = async (path) => {
          const normalized = String(path || '').replace(/^\/+/, '');
          const entry = zip.file(normalized) || zip.file(paths.get(normalized.toLowerCase()) || '');
          if (!entry) return null;
          const doc = parser.parseFromString(await entry.async('string'), 'application/xml');
          return doc.getElementsByTagName('parsererror').length ? null : doc;
        };
        const themeColors = wpOfficeThemeColors(await xmlAt('xl/theme/theme1.xml'));
        const workbookDoc = await xmlAt('xl/workbook.xml');
        const workbookRels = wpSpreadsheetRelationshipMap(
          await xmlAt('xl/_rels/workbook.xml.rels')
        );
        if (!workbookDoc) return bySheet;
        const worksheetPathByName = new Map();
        wpOfficeXmlElements(workbookDoc, 'sheet').forEach((sheetNode, index) => {
          const name = String(wpOfficeXmlAttr(sheetNode, 'name', sheetNames[index] || '')).trim();
          const relationship = workbookRels.get(String(wpOfficeXmlAttr(sheetNode, 'id', '')).trim());
          if (name && relationship) {
            worksheetPathByName.set(name, wpPptxPackagePath('xl/workbook.xml', relationship.target));
          }
        });
        for (const sheetName of (Array.isArray(sheetNames) ? sheetNames : [])) {
          const worksheetPath = worksheetPathByName.get(sheetName);
          if (!worksheetPath) continue;
          const worksheetDoc = await xmlAt(worksheetPath);
          const worksheetRels = wpSpreadsheetRelationshipMap(
            await xmlAt(wpSpreadsheetRelationshipPartPath(worksheetPath))
          );
          if (!worksheetDoc) continue;
          const plans = [];
          for (const tablePart of wpOfficeXmlElements(worksheetDoc, 'tablepart')) {
            const relationship = worksheetRels.get(
              String(wpOfficeXmlAttr(tablePart, 'id', '')).trim()
            );
            if (!relationship || !/\/table$/i.test(String(relationship.type || ''))) continue;
            const tablePath = wpPptxPackagePath(worksheetPath, relationship.target);
            const tableDoc = await xmlAt(tablePath);
            const tableNode = tableDoc && tableDoc.documentElement;
            if (!tableNode || wpOfficeLocalName(tableNode) !== 'table') continue;
            const styleInfo = wpOfficeXmlChildren(tableNode, 'tablestyleinfo')[0];
            const reference = String(wpOfficeXmlAttr(tableNode, 'ref', '')).trim();
            if (!reference) continue;
            plans.push({
              ref:reference,
              name:String(wpOfficeXmlAttr(tableNode, 'displayName',
                wpOfficeXmlAttr(tableNode, 'name', 'Bảng Excel'))),
              headerRowCount:Math.max(0, wpOfficeNumber(
                wpOfficeXmlAttr(tableNode, 'headerRowCount', '1'), 1
              )),
              totalsRowCount:Math.max(0, wpOfficeNumber(
                wpOfficeXmlAttr(tableNode, 'totalsRowCount',
                  /^(?:1|true)$/i.test(String(wpOfficeXmlAttr(tableNode, 'totalsRowShown', '')))
                    ? '1' : '0')
              )),
              styleName:String(wpOfficeXmlAttr(styleInfo, 'name', 'TableStyleMedium2')),
              showFirstColumn:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(styleInfo, 'showFirstColumn', ''))),
              showLastColumn:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(styleInfo, 'showLastColumn', ''))),
              showRowStripes:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(styleInfo, 'showRowStripes', ''))),
              showColumnStripes:/^(?:1|true)$/i.test(String(wpOfficeXmlAttr(styleInfo, 'showColumnStripes', ''))),
              themeColors,
            });
          }
          if (plans.length) bySheet.set(sheetName, plans);
        }
      } catch (error) {
        console.warn('Không đọc được kiểu bảng Excel:', error);
      }
      return bySheet;
    }

    function wpSpreadsheetBlendColor(color, whiteRatio) {
      const source = String(color || '').replace(/^#/, '');
      if (!/^[0-9a-f]{6}$/i.test(source)) return color;
      const ratio = Math.max(0, Math.min(1, wpOfficeNumber(whiteRatio)));
      const channels = [0, 2, 4].map((offset) => parseInt(source.slice(offset, offset + 2), 16));
      return `#${channels.map((value) => Math.round(value + (255 - value) * ratio)
        .toString(16).padStart(2, '0')).join('')}`;
    }

    function wpApplySpreadsheetTableStyle(element, rowIndex, columnIndex, tablePlans, XLSX) {
      if (!(element instanceof HTMLElement) || !Array.isArray(tablePlans) || !XLSX) return;
      for (const plan of tablePlans) {
        let range;
        try { range = XLSX.utils.decode_range(String(plan && plan.ref || '')); }
        catch (_) { continue; }
        if (rowIndex < range.s.r || rowIndex > range.e.r
            || columnIndex < range.s.c || columnIndex > range.e.c) continue;
        const styleName = String(plan.styleName || 'TableStyleMedium2');
        const styleNumber = Math.max(1, wpOfficeNumber((styleName.match(/(\d+)$/) || [])[1], 2));
        const accentIndex = ((styleNumber - 2) % 6 + 6) % 6 + 1;
        const theme = plan.themeColors || {};
        const accent = theme[`accent${accentIndex}`] || theme.accent1 || '#5b9bd5';
        const border = wpSpreadsheetBlendColor(accent, .25);
        const band = wpSpreadsheetBlendColor(accent, .82);
        const headerRows = Math.min(range.e.r - range.s.r + 1,
          Math.max(0, wpOfficeNumber(plan.headerRowCount, 1)));
        const totalsRows = Math.min(range.e.r - range.s.r + 1 - headerRows,
          Math.max(0, wpOfficeNumber(plan.totalsRowCount, 0)));
        const isHeader = rowIndex < range.s.r + headerRows;
        const isTotal = totalsRows > 0 && rowIndex > range.e.r - totalsRows;
        const dataIndex = rowIndex - range.s.r - headerRows;
        element.style.borderLeft = `1px solid ${border}`;
        element.style.borderRight = `1px solid ${border}`;
        element.style.borderTop = `1px solid ${border}`;
        element.style.borderBottom = `1px solid ${border}`;
        if (isHeader) {
          element.style.backgroundColor = accent;
          element.style.color = '#ffffff';
          element.style.fontWeight = '700';
        } else if (isTotal) {
          element.style.backgroundColor = '#ffffff';
          element.style.color = '#0f172a';
          element.style.fontWeight = '700';
          element.style.borderTop = `2px solid ${accent}`;
        } else {
          const rowStripe = plan.showRowStripes && dataIndex >= 0 && dataIndex % 2 === 0;
          const columnStripe = plan.showColumnStripes
            && (columnIndex - range.s.c) % 2 === 0;
          element.style.backgroundColor = rowStripe || columnStripe ? band : '#ffffff';
        }
        if ((plan.showFirstColumn && columnIndex === range.s.c)
            || (plan.showLastColumn && columnIndex === range.e.c)) {
          element.style.fontWeight = '700';
        }
        element.dataset.xlsxTableName = String(plan.name || 'Bảng Excel');
        break;
      }
    }

    function wpSpreadsheetRangeWithObjects(range, officeObjects, tablePlans = [], XLSX = null) {
      const next = {
        s:{ r:Number(range && range.s && range.s.r) || 0, c:Number(range && range.s && range.s.c) || 0 },
        e:{ r:Number(range && range.e && range.e.r) || 0, c:Number(range && range.e && range.e.c) || 0 },
      };
      (Array.isArray(officeObjects) ? officeObjects : []).forEach((item) => {
        const anchor = item && item.anchor || {};
        [anchor.from, anchor.to].filter(Boolean).forEach((point) => {
          next.s.r = Math.min(next.s.r, Math.max(0, Number(point.row) || 0));
          next.s.c = Math.min(next.s.c, Math.max(0, Number(point.col) || 0));
          next.e.r = Math.max(next.e.r, Math.max(0, Number(point.row) || 0));
          next.e.c = Math.max(next.e.c, Math.max(0, Number(point.col) || 0));
        });
      });
      (Array.isArray(tablePlans) ? tablePlans : []).forEach((plan) => {
        if (!XLSX || !XLSX.utils) return;
        try {
          const tableRange = XLSX.utils.decode_range(String(plan && plan.ref || ''));
          next.s.r = Math.min(next.s.r, Math.max(0, tableRange.s.r));
          next.s.c = Math.min(next.s.c, Math.max(0, tableRange.s.c));
          next.e.r = Math.max(next.e.r, Math.max(0, tableRange.e.r));
          next.e.c = Math.max(next.e.c, Math.max(0, tableRange.e.c));
        } catch (_) {}
      });
      return next;
    }

    function wpSpreadsheetObjectBounds(plan, built) {
      const anchor = plan && plan.anchor || {};
      const range = built && built.range || { s:{ r:0, c:0 }, e:{ r:0, c:0 } };
      const columns = Array.isArray(built && built.columnMetrics) ? built.columnMetrics : [];
      const rows = Array.isArray(built && built.rowTracks) ? built.rowTracks : [];
      const pointPosition = (point) => {
        if (!point) return { left:0, top:0 };
        let left = 0;
        let top = 0;
        for (let column = range.s.c; column < Number(point.col); column += 1) {
          left += Number(columns[column - range.s.c]) || 0;
        }
        for (let row = range.s.r; row < Number(point.row); row += 1) {
          top += Number(rows[row - range.s.r]) || 0;
        }
        left += wpOfficeEmuToPx(point.colOff);
        top += wpOfficeEmuToPx(point.rowOff);
        return { left, top };
      };
      if (anchor.type === 'absoluteanchor') {
        return {
          left:wpOfficeEmuToPx(anchor.x),
          top:wpOfficeEmuToPx(anchor.y),
          width:Math.max(1, wpOfficeEmuToPx(anchor.cx)),
          height:Math.max(1, wpOfficeEmuToPx(anchor.cy)),
        };
      }
      const start = pointPosition(anchor.from);
      if (anchor.to) {
        const end = pointPosition(anchor.to);
        return {
          left:start.left,
          top:start.top,
          width:Math.max(1, end.left - start.left),
          height:Math.max(1, end.top - start.top),
        };
      }
      return {
        left:start.left,
        top:start.top,
        width:Math.max(1, wpOfficeEmuToPx(anchor.cx)),
        height:Math.max(1, wpOfficeEmuToPx(anchor.cy)),
      };
    }

    function wpAttachSpreadsheetObjects(table, officeObjects, built) {
      if (!(table instanceof HTMLElement)
          || !Array.isArray(officeObjects) || !officeObjects.length) return;
      const layer = wpOfficeObjectLayer(table, false);
      if (!(layer instanceof HTMLElement)) return;
      layer.style.width = `${Math.max(1, Number(built && built.width) || 1)}px`;
      layer.style.height = `${Math.max(1, Number(built && built.height) || 1)}px`;
      officeObjects.forEach((plan) => {
        const bounds = wpSpreadsheetObjectBounds(plan, built);
        const host = wpOfficeObjectHost(bounds, {
          zIndex:100 + wpOfficeNumber(plan && plan.zIndex),
          rotation:wpOfficeNumber(plan && plan.rotation),
          objectKind:plan && plan.type,
          objectPreset:plan && plan.shapePlan && plan.shapePlan.presetName,
        });
        let visual = null;
        if (plan.type === 'image' && plan.src) {
          visual = document.createElement('img');
          visual.src = plan.src;
          visual.alt = 'Hình ảnh trong Excel';
          visual.draggable = false;
        } else if (plan.type === 'shape' && plan.shapePlan) {
          visual = wpOfficeShapeSvgElement(plan.shapePlan, 'Hình vẽ trong Excel');
        } else if (plan.type === 'shape-group' && plan.groupPlan) {
          visual = wpOfficeShapeGroupSvgElement(plan.groupPlan);
        } else if (plan.type === 'chart' && plan.chartPlan) {
          visual = wpOfficeChartSvgElement(plan.chartPlan);
        }
        if (!visual) return;
        host.appendChild(visual);
        mvipAttachObjectHyperlink(host, plan.hyperlink);
        layer.appendChild(host);
      });
    }

    function wpBuildSpreadsheetTable(XLSX, sheet, sheetName, legacyStyles, sheetIndex,
      officeObjects = [], tablePlans = []) {
      const range = wpSpreadsheetRangeWithObjects(
        wpSpreadsheetUsedRange(XLSX, sheet), officeObjects, tablePlans, XLSX
      );
      sheet['!ref'] = XLSX.utils.encode_range(range);
      const columns = Array.isArray(sheet['!cols']) ? sheet['!cols'] : [];
      const rows = Array.isArray(sheet['!rows']) ? sheet['!rows'] : [];
      const digitWidth = wpSpreadsheetDigitWidth(legacyStyles);
      const currentSheetStyle = legacyStyles && Array.isArray(legacyStyles.sheets)
        ? legacyStyles.sheets[sheetIndex] : null;
      /* Dùng CSS Grid thay cho <table>. Thuật toán table-layout của Chromium có
         thể tự dồn phần cao còn thừa vào hàng có ô gộp, dù <tr>/<td> đã có
         height tuyệt đối. Grid khóa trực tiếp từng track nên giữ đúng hình học
         của workbook, kể cả cột/hàng ẩn và ô gộp. */
      const table = document.createElement('div');
      table.className = 'ordinary-xlsx-grid';
      if (!currentSheetStyle || currentSheetStyle.showGridLines !== false) {
        table.classList.add('shows-gridlines');
      }
      table.setAttribute('role', 'table');
      table.setAttribute('aria-label', `Nội dung trang tính ${sheetName}`);
      let tableWidth = 0;
      const columnMetrics = [];
      for (let columnIndex = range.s.c; columnIndex <= range.e.c; columnIndex += 1) {
        const width = wpSpreadsheetColumnWidth(
          wpSpreadsheetSourceColumnInfo(
            currentSheetStyle, columnIndex, columns[columnIndex]
          ), digitWidth,
          currentSheetStyle && currentSheetStyle.defaultColumnWidth
        );
        const lockedWidth = width > 0 ? width : 0;
        columnMetrics.push(lockedWidth);
        if (lockedWidth > 0) tableWidth += lockedWidth;
      }

      const mergeStarts = new Map();
      const mergeCovered = new Set();
      (Array.isArray(sheet['!merges']) ? sheet['!merges'] : []).forEach((merge) => {
        if (!merge || !merge.s || !merge.e) return;
        const startRow = Math.max(range.s.r, Number(merge.s.r) || 0);
        const startColumn = Math.max(range.s.c, Number(merge.s.c) || 0);
        const endRow = Math.min(range.e.r, Number(merge.e.r) || 0);
        const endColumn = Math.min(range.e.c, Number(merge.e.c) || 0);
        if (endRow < startRow || endColumn < startColumn) return;
        mergeStarts.set(`${startRow}:${startColumn}`, {
          rowSpan: endRow - startRow + 1,
          colSpan: endColumn - startColumn + 1,
        });
        for (let rowIndex = startRow; rowIndex <= endRow; rowIndex += 1) {
          for (let columnIndex = startColumn; columnIndex <= endColumn; columnIndex += 1) {
            if (rowIndex !== startRow || columnIndex !== startColumn) {
              mergeCovered.add(`${rowIndex}:${columnIndex}`);
            }
          }
        }
      });

      const rowMetrics = new Map();
      const rowTracks = [];
      let tableHeight = 0;
      for (let rowIndex = range.s.r; rowIndex <= range.e.r; rowIndex += 1) {
        const height = wpSpreadsheetRowHeight(
          wpSpreadsheetSourceRowInfo(
            currentSheetStyle, rowIndex, rows[rowIndex]
          ), currentSheetStyle && currentSheetStyle.defaultRowHeight
        );
        const lockedHeight = height > 0 ? height : 0;
        rowMetrics.set(rowIndex, lockedHeight);
        rowTracks.push(lockedHeight);
        if (lockedHeight > 0) tableHeight += lockedHeight;
      }

      table.style.gridTemplateColumns = columnMetrics
        .map((width) => `${Math.max(0, width)}px`).join(' ');
      table.style.gridTemplateRows = rowTracks
        .map((height) => `${Math.max(0, height)}px`).join(' ');

      for (let rowIndex = range.s.r; rowIndex <= range.e.r; rowIndex += 1) {
        const rowHeight = Number(rowMetrics.get(rowIndex)) || 0;
        for (let columnIndex = range.s.c; columnIndex <= range.e.c; columnIndex += 1) {
          const key = `${rowIndex}:${columnIndex}`;
          if (mergeCovered.has(key)) continue;
          const cellElement = document.createElement('div');
          cellElement.className = 'ordinary-xlsx-cell';
          cellElement.setAttribute('role', 'cell');
          const merge = mergeStarts.get(key);
          const gridColumn = columnIndex - range.s.c + 1;
          const gridRow = rowIndex - range.s.r + 1;
          const colSpan = Math.max(1, Number(merge && merge.colSpan) || 1);
          const rowSpan = Math.max(1, Number(merge && merge.rowSpan) || 1);
          let lockedCellHeight = 0;
          for (let mergeRow = rowIndex;
            mergeRow < rowIndex + rowSpan; mergeRow += 1) {
            lockedCellHeight += Number(rowMetrics.get(mergeRow)) || 0;
          }
          cellElement.style.gridColumn = `${gridColumn} / span ${colSpan}`;
          cellElement.style.gridRow = `${gridRow} / span ${rowSpan}`;
          if (rowHeight <= 0 || columnMetrics[columnIndex - range.s.c] <= 0) {
            cellElement.setAttribute('aria-hidden', 'true');
          }
          const address = XLSX.utils.encode_cell({ r: rowIndex, c: columnIndex });
          const cell = sheet[address];
          cellElement.dataset.xlsxAddress = address;
          if (cell) {
            let displayValue = cell.w;
            if (displayValue == null && XLSX.utils && typeof XLSX.utils.format_cell === 'function') {
              try { displayValue = XLSX.utils.format_cell(cell); } catch (_) {}
            }
            if (displayValue == null && cell.v != null) displayValue = cell.v;
            cellElement.textContent = displayValue == null ? '' : String(displayValue);
            wpApplySpreadsheetCellStyle(cellElement, cell);
          }
          const legacyXf = wpLegacySpreadsheetXf(
            legacyStyles, sheetIndex, rowIndex, columnIndex
          );
          if (legacyXf) {
            wpApplyLegacySpreadsheetStyle(cellElement, cell, legacyStyles, legacyXf);
            if (merge) {
              wpApplyLegacySpreadsheetMergedBorders(
                cellElement, legacyStyles, sheetIndex, rowIndex, columnIndex, merge
              );
            }
          }
          wpApplySpreadsheetTableStyle(
            cellElement, rowIndex, columnIndex, tablePlans, XLSX
          );
          const overflowWidth = wpSpreadsheetTextOverflowWidth(
            XLSX, sheet, range, rowIndex, columnIndex, cell, cellElement, merge,
            columnMetrics, mergeStarts, mergeCovered
          );
          wpFinalizeSpreadsheetGridCell(
            cellElement, overflowWidth, lockedCellHeight
          );
          const linkTarget = wpSpreadsheetCellHyperlink(cell, sheet, wpOrdinaryState.xlsxWorkbook);
          if (mvipSafeHyperlink(linkTarget)) {
            const content = cellElement.querySelector('.ordinary-xlsx-cell-content');
            const anchor = document.createElement('a');
            anchor.className = 'mvip-xlsx-cell-link';
            mvipSetDocumentLink(anchor, linkTarget);
            anchor.title = cell.l && cell.l.Tooltip || linkTarget;
            while (content.firstChild) anchor.appendChild(content.firstChild);
            if (!anchor.textContent) anchor.textContent = linkTarget;
            content.appendChild(anchor);
          }
          table.appendChild(cellElement);
        }
      }
      const lockedTableHeight = Math.max(1, tableHeight);
      table.style.setProperty('--ordinary-xlsx-table-height', `${lockedTableHeight}px`);
      table.style.setProperty('height', `${lockedTableHeight}px`, 'important');
      table.style.setProperty('min-height', `${lockedTableHeight}px`, 'important');
      table.style.setProperty('max-height', `${lockedTableHeight}px`, 'important');
      table.style.width = `${Math.max(1, tableWidth)}px`;
      table.style.minWidth = `${Math.max(1, tableWidth)}px`;
      table.style.maxWidth = `${Math.max(1, tableWidth)}px`;
      const built = {
        table,
        width:Math.max(1, tableWidth),
        height:lockedTableHeight,
        range,
        columnMetrics,
        rowTracks,
      };
      wpAttachSpreadsheetObjects(table, officeObjects, built);
      return built;
    }

    async function wpLoadOrdinarySpreadsheet(file, arrayBuffer) {
      const XLSX = await wpEnsureSpreadsheetRenderer();
      const workbook = XLSX.read(arrayBuffer, {
        type: 'array',
        cellDates: true,
        cellStyles: true,
        cellNF: true,
        cellText: true,
      });
      wpOrdinaryState.xlsxWorkbook = workbook;
      const sheetNames = Array.isArray(workbook.SheetNames) ? workbook.SheetNames.slice() : [];
      if (!sheetNames.length) throw new Error('File Excel không có trang tính để trình chiếu.');
      const [spreadsheetStyles, spreadsheetObjects, spreadsheetTables] = await Promise.all([
        wpReadSpreadsheetStyles(XLSX, arrayBuffer, workbook),
        wpReadSpreadsheetDrawingObjects(arrayBuffer, sheetNames),
        wpReadSpreadsheetTablePlans(arrayBuffer, sheetNames),
      ]);
      const workbookSheetMeta = workbook.Workbook && Array.isArray(workbook.Workbook.Sheets)
        ? workbook.Workbook.Sheets : [];
      let sheetEntries = sheetNames.map((sheetName, originalIndex) => ({
        sheetName,
        originalIndex,
        hidden: Number(workbookSheetMeta[originalIndex] && workbookSheetMeta[originalIndex].Hidden) || 0,
      })).filter((entry) => entry.hidden === 0);
      if (!sheetEntries.length) {
        sheetEntries = sheetNames.map((sheetName, originalIndex) => ({
          sheetName, originalIndex, hidden: 0,
        }));
      }

      wpOrdinaryState.kind = 'xlsx';
      card.className = 'word-presentation-card ordinary-document-card';
      card.innerHTML = '<div class="ordinary-document-page-host"><div class="ordinary-xlsx-render"></div></div>';
      const renderRoot = card.querySelector('.ordinary-xlsx-render');
      const host = card.querySelector('.ordinary-document-page-host');
      if (!(renderRoot instanceof HTMLElement) || !(host instanceof HTMLElement)) {
        throw new Error('Không tạo được vùng trình chiếu Excel.');
      }

      const pages = [];
      const visibleSheetNames = [];
      sheetEntries.forEach((entry) => {
        const { sheetName, originalIndex } = entry;
        const sheet = workbook.Sheets && workbook.Sheets[sheetName];
        if (!sheet) return;
        const page = document.createElement('section');
        page.className = 'ordinary-xlsx-sheet';
        page.dataset.ordinaryPageIndex = String(pages.length);
        page.dataset.xlsxSheetName = String(sheetName || '');
        page.dataset.xlsxWorkbookSheetIndex = String(originalIndex);
        page.id = `ordinaryExcelSheetPanel${pages.length + 1}`;
        page.setAttribute('role', 'tabpanel');
        page.setAttribute('aria-label', `Trang tính ${sheetName}`);
        page.hidden = pages.length > 0;
        const built = wpBuildSpreadsheetTable(
          XLSX, sheet, sheetName, spreadsheetStyles, originalIndex,
          spreadsheetObjects.get(sheetName) || [],
          spreadsheetTables.get(sheetName) || []
        );
        page.appendChild(built.table);
        const pageWidth = Math.max(1, built.width + 32);
        page.style.width = `${pageWidth}px`;
        page.style.minWidth = `${pageWidth}px`;
        page.dataset.xlsxBaseWidth = String(pageWidth);
        renderRoot.appendChild(page);
        pages.push(page);
        visibleSheetNames.push(String(sheetName || `Sheet ${pages.length}`));
      });

      if (!pages.length) throw new Error('File Excel không có trang tính để trình chiếu.');
      wpOrdinaryState.xlsxPages = pages;
      wpOrdinaryState.xlsxRoot = renderRoot;
      wpOrdinaryState.xlsxSheetNames = visibleSheetNames;
      wpOrdinaryState.xlsxScrollPositions.clear();
      wpOrdinaryState.pageCount = pages.length;
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      wpOrdinaryState.pageIndex = 0;
      wpCreateSpreadsheetSheetTabs(visibleSheetNames);
      wpShowSpreadsheetSheet(0, { initial: true });
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      wpUpdateRegionButton();
    }

    async function wpLoadOrdinaryPowerPoint(file, arrayBuffer) {
      const [PptxViewer, renderBuffer] = await Promise.all([
        wpEnsurePptxRenderer(),
        wpPowerPointRenderableBuffer(arrayBuffer).catch(() => arrayBuffer),
      ]);
      wpOrdinaryState.kind = 'pptx';
      card.className = 'word-presentation-card ordinary-document-card';
      card.innerHTML = '<div class="ordinary-document-page-host"><div class="ordinary-pptx-render"></div></div>';
      const renderRoot = card.querySelector('.ordinary-pptx-render');
      if (!(renderRoot instanceof HTMLElement)) {
        throw new Error('Không tạo được vùng trình chiếu PowerPoint.');
      }

      const viewer = await PptxViewer.open(renderBuffer, renderRoot, {
        renderMode: 'list',
        fitMode: 'contain',
        scrollContainer: viewport,
        pdfjs: false,
        lazyMedia: true,
        lazySlides: false,
        listOptions: {
          windowed: false,
          showSlideLabels: false,
        },
      });
      wpOrdinaryState.pptxViewer = viewer;
      await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
      const slideCandidates = Array.from(renderRoot.querySelectorAll('[data-slide-index]'));
      const pages = slideCandidates.filter((slide) => !slide.parentElement
        || !slide.parentElement.closest('[data-slide-index]'));
      if (!pages.length) throw new Error('File PowerPoint không có trang chiếu để trình chiếu.');
      pages.forEach((page, index) => {
        page.classList.add('ordinary-pptx-page');
        page.dataset.ordinaryPageIndex = String(index);
        page.setAttribute('aria-label', `Trang chiếu PowerPoint ${index + 1}`);
        wpFixPowerPointWingdingsGlyphs(page);
      });
      wpOrdinaryState.pptxPages = pages;
      wpOrdinaryState.pptxRoot = renderRoot;
      wpOrdinaryState.pageCount = pages.length;
      const available = wpOrdinaryAvailableSize();
      /* Bộ dựng PowerPoint đã tự fit trang chiếu vào bề rộng renderRoot.
         Mốc zoom nội bộ vì thế chính là bề rộng vùng trình chiếu, không phải
         kích thước slide gốc trong gói PowerPoint. */
      wpOrdinaryState.baseContentWidth = available.width;
      wpOrdinaryState.pageIndex = 0;
      wpSyncOrdinaryPageUi();
      wpFitOrdinaryPage();
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      wpUpdateRegionButton();
    }

    async function wpRenderPowerPointSlide(index, direction = 1, options = {}) {
      const viewer = wpOrdinaryState.pptxViewer;
      if (wpOrdinaryState.kind !== 'pptx-slide' || !viewer || typeof viewer.renderSlide !== 'function') return;
      if (Number(index) < 0) return;
      const safeIndex = Math.max(0, Math.min(Number(index) || 0, wpOrdinaryState.pageCount - 1));
      const restoreLastBuild = !!(options && options.restoreLastBuild);
      const serial = ++wpOrdinaryState.pptxRenderSerial;
      const renderRoot = wpOrdinaryState.pptxRoot;
      wpStopPowerPointMedia();
      if (wpOrdinaryState.pptxAutoTimer) clearTimeout(wpOrdinaryState.pptxAutoTimer);
      wpOrdinaryState.pptxAutoTimer = 0;
      wpOrdinaryState.pageIndex = safeIndex;
      wpOrdinaryState.pptxBuildIndex = 0;
      presenter.classList.add('is-pptx-rendering');
      if (prevBtn) prevBtn.disabled = true;
      if (nextBtn) nextBtn.disabled = true;
      powerPointPrevBtn.disabled = true;
      powerPointNextBtn.disabled = true;
      /* Khóa phần vẽ trước khi bộ dựng thay slide. Lớp này chỉ được gỡ sau
         wpPrepareCurrentPowerPointBuilds(), vì chính hàm đó mới ẩn đúng các
         đối tượng entrance của trạng thái đầu tiên. */
      if (renderRoot instanceof HTMLElement) {
        renderRoot.classList.add('is-pptx-build-staging');
        renderRoot.setAttribute('aria-busy', 'true');
      }
      let renderSucceeded = false;
      try {
        const slidePlan = wpOrdinaryState.pptxSlidePlans[safeIndex] || {};
        /* Không dùng bản clone dựng trong host ẩn cho các slide nền ảnh
           toàn khung: viewer chính giữ hình học slide đúng ở viewport thật. */
        const preloadedPage = slidePlan.requiresNativeSlideRender
          ? null : wpOrdinaryState.pptxPreloadedPages[safeIndex];
        let usedPreloadedPage = false;
        if (preloadedPage instanceof HTMLElement && renderRoot instanceof HTMLElement) {
          const readyPage = preloadedPage.cloneNode(true);
          if (readyPage instanceof HTMLElement) {
            wpCopyRegionCanvasPixels(preloadedPage, readyPage);
            renderRoot.replaceChildren(readyPage);
            usedPreloadedPage = true;
          } else {
            await viewer.renderSlide(safeIndex);
            await wpWaitPowerPointSlideAssets(viewer, safeIndex, renderRoot);
          }
        } else {
          await viewer.renderSlide(safeIndex);
          await wpWaitPowerPointSlideAssets(viewer, safeIndex, renderRoot);
        }
        if (usedPreloadedPage && renderRoot instanceof HTMLElement) {
          await wpWaitPowerPointDomAssets(renderRoot, 4000);
        }
        renderSucceeded = true;
      } finally {
        if (serial === wpOrdinaryState.pptxRenderSerial) presenter.classList.remove('is-pptx-rendering');
        if (!renderSucceeded && serial === wpOrdinaryState.pptxRenderSerial
          && renderRoot instanceof HTMLElement) {
          renderRoot.classList.remove('is-pptx-build-staging');
          renderRoot.removeAttribute('aria-busy');
        }
      }
      if (serial !== wpOrdinaryState.pptxRenderSerial || wpOrdinaryState.kind !== 'pptx-slide') return;
      const page = wpOrdinaryState.pptxRoot && wpOrdinaryState.pptxRoot.firstElementChild;
      wpOrdinaryState.pptxPages = page instanceof HTMLElement ? [page] : [];
      if (page instanceof HTMLElement) {
        page.dataset.ordinaryPageIndex = String(safeIndex);
        page.setAttribute('aria-label', `Trang chiếu PowerPoint ${safeIndex + 1}`);
      }
      wpPrepareCurrentPowerPointBuilds(true, {
        suppressAutoStart: restoreLastBuild,
      });
      /* Khi lùi từ slide sau sang slide trước, PowerPoint phải trở lại trạng
         thái cuối của slide trước. Ví dụ 6→5→4 rồi phải về 3, sau đó mới
         tiếp tục 2→1; không dựng lại slide trước ở trạng thái hiệu ứng 1. */
      if (restoreLastBuild && wpOrdinaryState.pptxBuildGroups.length) {
        wpOrdinaryState.pptxBuildIndex = wpOrdinaryState.pptxBuildGroups.length;
        wpRestorePowerPointBuildState();
      }
      wpFitOrdinaryPage();
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      if (renderRoot instanceof HTMLElement) {
        /* Ép trình duyệt ghi nhận toàn bộ visibility/clip-path vừa chuẩn bị
           trước khi mở khóa vùng vẽ, ngăn một frame đầy đủ bị lọt ra ngoài. */
        void renderRoot.offsetWidth;
        renderRoot.classList.remove('is-pptx-build-staging');
        renderRoot.removeAttribute('aria-busy');
      }
      wpApplyPowerPointSlideTransition(direction);
      wpSyncOrdinaryPageUi();
      wpUpdateRegionButton();
      wpTrimPowerPointPreloadedPages(safeIndex);
      wpRememberPowerPointSlide(safeIndex);
      if (wordPresentationIsFullscreen()) wpRestartCountdownAfterQuestionChange();
      wpSchedulePowerPointAutoAdvance();
      wpRequestPowerPointPreloadWindow();
      /* Nếu giáo viên bấm trong lúc bộ dựng đang thay DOM, giữ lại đúng một
         lệnh gần nhất và chạy ngay khi slide đã sẵn sàng. Nhờ vậy cú bấm không
         còn bị mất, nhưng bấm liên tiếp cũng không làm nhảy qua nhiều slide. */
      const queuedDirection = Number(wpOrdinaryState.pptxQueuedDirection) || 0;
      const queuedFullscreenOnSlideChange = !!wpOrdinaryState.pptxQueuedFullscreenOnSlideChange;
      wpOrdinaryState.pptxQueuedDirection = 0;
      wpOrdinaryState.pptxQueuedFullscreenOnSlideChange = false;
      if (queuedDirection) {
        requestAnimationFrame(() => {
          if (wpOrdinaryState.kind === 'pptx-slide' && !presenter.classList.contains('is-pptx-rendering')) {
            wpAdvancePowerPointPresentation(queuedDirection, {
              enterFullscreenOnSlideChange:queuedFullscreenOnSlideChange,
            });
          }
        });
      }
    }

    function wpAdvancePowerPointPresentation(direction = 1, options = {}) {
      if (wpOrdinaryState.kind !== 'pptx-slide') return false;
      const enterFullscreenOnSlideChange = direction > 0
        && !!(options && options.enterFullscreenOnSlideChange);
      if (presenter.classList.contains('is-pptx-rendering')) {
        wpOrdinaryState.pptxQueuedDirection = direction < 0 ? -1 : 1;
        /* Lệnh gần nhất quyết định cả chiều lẫn việc tự bật toàn màn hình.
           Khi slide dựng xong, điều kiện này vẫn được kiểm tra lại sau phần
           hiệu ứng nên không bật sớm nếu Next chỉ chạy một build. */
        wpOrdinaryState.pptxQueuedFullscreenOnSlideChange = enterFullscreenOnSlideChange;
        return true;
      }
      if (direction > 0 && wpRunNextPowerPointBuild()) {
        wpSchedulePowerPointAutoAdvance();
        return true;
      }
      if (direction < 0 && wpOrdinaryState.pptxBuildIndex > 0) {
        wpOrdinaryState.pptxBuildIndex -= 1;
        wpRestorePowerPointBuildState();
        wpSyncOrdinaryPageUi();
        wpSchedulePowerPointAutoAdvance();
        return true;
      }
      const nextIndex = wpPowerPointVisibleSlideIndex(
        wpOrdinaryState.pageIndex + (direction < 0 ? -1 : 1), direction
      );
      if (nextIndex < 0 || nextIndex >= wpOrdinaryState.pageCount) return false;
      /* Chỉ đến đây mới chắc chắn Next vượt qua ranh giới slide. Gọi yêu cầu
         fullscreen ngay trong sự kiện bấm để Chrome vẫn công nhận thao tác
         của người dùng; các build 1→2→3 trong cùng slide không đi qua nhánh này. */
      if (enterFullscreenOnSlideChange && !wordPresentationIsFullscreen()) wpEnsureFullscreen();
      void wpRenderPowerPointSlide(nextIndex, direction, {
        restoreLastBuild: direction < 0,
      }).catch((error) => {
        wpNotify(error && error.message ? error.message : 'Không chuyển được trang chiếu PowerPoint.');
      });
      return true;
    }

    async function wpLoadPowerPointSlideDeck(file, arrayBuffer) {
      const [PptxViewer, plans, renderBuffer] = await Promise.all([
        wpEnsurePptxRenderer(),
        wpReadPowerPointSlidePlans(arrayBuffer).catch(() => []),
        wpPowerPointRenderableBuffer(arrayBuffer).catch(() => arrayBuffer),
      ]);
      wpOrdinaryState.kind = 'pptx-slide';
      wpOrdinaryState.pptxMode = 'slide';
      wpOrdinaryState.pptxSlidePlans = plans;
      wpOrdinaryState.pptxThumbnails = [];
      wpOrdinaryState.pptxPreloadedPages = [];
      const thumbnailSerial = ++wpOrdinaryState.pptxThumbnailSerial;
      presenter.classList.add('is-powerpoint-slide-mode');
      presenter.setAttribute('aria-label', 'Trình chiếu PowerPoint');
      card.className = 'word-presentation-card ordinary-document-card';
      card.innerHTML = '<div class="ordinary-document-page-host"><div class="ordinary-pptx-slide-stage"><div class="ordinary-pptx-slide-render"></div></div></div>';
      const renderRoot = card.querySelector('.ordinary-pptx-slide-render');
      const renderStage = card.querySelector('.ordinary-pptx-slide-stage');
      if (!(renderRoot instanceof HTMLElement)) throw new Error('Không tạo được vùng trình chiếu PowerPoint.');
      wpOrdinaryState.pptxRoot = renderRoot;
      const originalSlideSize = plans[0] && plans[0].slideSize;
      const originalSlideWidth = Math.max(160,
        wpPowerPointLengthPx(originalSlideSize && originalSlideSize.width, 1280));
      const originalSlideHeight = Math.max(90,
        wpPowerPointLengthPx(originalSlideSize && originalSlideSize.height, 720));
      renderRoot.dataset.pptxSourceWidthPx = String(originalSlideWidth);
      renderRoot.dataset.pptxSourceHeightPx = String(originalSlideHeight);
      renderRoot.style.width = `${originalSlideWidth}px`;
      renderRoot.style.height = `${originalSlideHeight}px`;
      renderRoot.style.aspectRatio = `${originalSlideWidth} / ${originalSlideHeight}`;
      if (renderStage instanceof HTMLElement) {
        renderStage.style.width = `${originalSlideWidth}px`;
        renderStage.style.height = `${originalSlideHeight}px`;
      }

      if (plans.length && plans.every((plan) => plan.hidden)) {
        throw new Error('File PowerPoint đang ẩn tất cả slide. Bạn bỏ ẩn ít nhất một slide rồi mở lại.');
      }
      renderRoot.classList.add('is-pptx-build-staging');
      const viewer = await PptxViewer.open(renderBuffer, renderRoot, {
        renderMode: 'slide',
        fitMode: 'contain',
        scrollContainer: viewport,
        pdfjs: false,
        lazyMedia: false,
        lazySlides: false,
      });
      wpOrdinaryState.pptxViewer = viewer;
      wpOrdinaryState.pageCount = Math.max(0, Number(viewer.slideCount) || 0);
      if (!wpOrdinaryState.pageCount) throw new Error('File PowerPoint không có trang chiếu để trình chiếu.');
      const firstVisibleIndex = wpPowerPointVisibleSlideIndex(0);
      if (firstVisibleIndex < 0) throw new Error('File PowerPoint đang ẩn tất cả slide.');
      if (firstVisibleIndex > 0) await viewer.renderSlide(firstVisibleIndex);
      await wpWaitPowerPointSlideAssets(viewer, firstVisibleIndex, renderRoot);
      wpOrdinaryState.pptxCacheKey = wpPowerPointFileCacheKey(file);
      wpOrdinaryState.pptxRememberedPageIndex = wpReadRememberedPowerPointSlide(
        wpOrdinaryState.pptxCacheKey, wpOrdinaryState.pageCount
      );
      chooseQuestionBtn.disabled = false;
      chooseQuestionBtn.classList.remove('is-pptx-tool-unavailable');
      chooseQuestionBtn.removeAttribute('aria-disabled');
      chooseQuestionBtn.textContent = 'Chọn Slide';
      chooseQuestionBtn.title = 'Mở danh sách slide kèm ảnh đại diện';
      wpOrdinaryState.pptxThumbnailPromise = null;
      wpOrdinaryState.pageIndex = firstVisibleIndex;
      wpOrdinaryState.baseContentWidth = wpOrdinaryAvailableSize().width;
      const page = renderRoot.firstElementChild;
      wpOrdinaryState.pptxPages = page instanceof HTMLElement ? [page] : [];
      if (page instanceof HTMLElement) {
        page.dataset.ordinaryPageIndex = String(firstVisibleIndex);
        page.setAttribute('aria-label', `Trang chiếu PowerPoint ${firstVisibleIndex + 1}`);
      }
      /* Mọi lần renderSlide của viewer chính đều đã được await, chờ tài
         nguyên và chuẩn bị hiệu ứng trong wpRenderPowerPointSlide(). Không
         đăng ký thêm rendercomplete ở đây vì callback bất đồng bộ thứ hai có
         thể gắn lại shape sau khi trang tải sẵn vừa được đưa lên màn hình. */
      wpPrepareCurrentPowerPointBuilds(true);
      renderRoot.classList.remove('is-pptx-build-staging');
      wpFitOrdinaryPage();
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      wpApplyPowerPointSlideTransition(1);
      wpSyncOrdinaryPageUi();
      wpUpdateRegionButton();
      if (!wordPresentationIsFullscreen()) wpSetScanSplit(true);
      /* Thanh công cụ PowerPoint được đồng bộ bất đồng bộ sau khi mở. Ở lần
         mở thứ hai, kích thước cuối có thể trùng hệt phiên trước nên
         ResizeObserver không phát thêm lượt fit. Chốt lại theo chính root mới
         ở vài nhịp ngắn để không dùng kích thước tạm lúc thanh công cụ chưa ổn định. */
      wpSettleOpenedPowerPointFit(renderRoot);
      wpSchedulePowerPointAutoAdvance();
      /* Slide 1 đã hiện xong mới đọc ảnh đại diện nhẹ và dựng trước hai slide kế tiếp. */
      wpOrdinaryState.pptxThumbnailPromise = (async () => {
        const cached = await wpLoadCachedPowerPointThumbnails(
          wpOrdinaryState.pptxCacheKey, wpOrdinaryState.pageCount
        );
        if (thumbnailSerial !== wpOrdinaryState.pptxThumbnailSerial
          || wpOrdinaryState.kind !== 'pptx-slide') return;
        cached.forEach((thumbnail, index) => {
          if (!thumbnail || wpOrdinaryState.pptxThumbnails[index]) return;
          wpOrdinaryState.pptxThumbnails[index] = thumbnail;
          wpUpdatePowerPointPickerThumbnail(index);
        });
        await wpSchedulePowerPointSlidePreload(
          PptxViewer, renderBuffer, thumbnailSerial, originalSlideWidth, originalSlideHeight
        );
      })();
    }

    async function wpLoadPowerPointPresentationFile(file) {
      if (!file || wpState.busy) return;
      const fileName = String(file.name || 'Bài trình chiếu PowerPoint').trim();
      const lowerName = fileName.toLowerCase();
      if (/\.ppt$/i.test(lowerName) && !/\.pptx$/i.test(lowerName)) {
        throw new Error('File .ppt là định dạng PowerPoint cũ. Bạn mở file bằng PowerPoint, chọn Save As và lưu thành .pptx rồi thử lại.');
      }
      if (!/\.(?:pptx|pptm)$/i.test(lowerName)) {
        throw new Error('Bạn chọn file PowerPoint định dạng .pptx hoặc .pptm.');
      }
      wpState.busy = true;
      startBtn.disabled = true;
      const oldText = startBtn.textContent;
      startBtn.textContent = 'Đang mở PowerPoint...';
      wpResetOrdinaryDocument(true);
      wpPrimePowerPointAudio();
      wpOrdinaryState.kind = 'pptx-slide';
      presenter.classList.add('is-powerpoint-slide-mode');
      wpCloseWordOnlyPresentationTools();
      wpShowOrdinaryLoading(fileName);
      presenter.setAttribute('aria-label', 'Trình chiếu PowerPoint');
      try {
        await wpLoadPowerPointSlideDeck(file, await file.arrayBuffer());
      } catch (error) {
        await wpClosePresenter();
        throw error;
      } finally {
        wpState.busy = false;
        startBtn.disabled = false;
        startBtn.textContent = oldText || 'Trình chiếu tài liệu';
        wpUpdateRegionButton();
      }
    }

    async function wpLoadOrdinaryFile(file) {
      if (!file || wpState.busy) return;
      const fileName = String(file.name || 'Tài liệu').trim();
      const lowerName = fileName.toLowerCase();
      if (/\.doc$/i.test(lowerName) && !/\.docx$/i.test(lowerName)) {
        throw new Error('File .doc là định dạng Word cũ nên phần mềm không hỗ trợ. Bạn mở file bằng Word, chọn Save As và lưu thành .docx rồi thử lại.');
      }
      const isPdf = /\.pdf$/i.test(lowerName) || String(file.type || '').toLowerCase() === 'application/pdf';
      const isDocx = /\.(?:docx|docm)$/i.test(lowerName);
      const isExcel = /\.(?:xlsx|xls|xlsm|xlsb)$/i.test(lowerName);
      if (!isPdf && !isDocx && !isExcel) {
        throw new Error('Bạn chọn file Word, PDF hoặc Excel đúng định dạng được hỗ trợ.');
      }

      wpState.busy = true;
      startBtn.disabled = true;
      const oldText = startBtn.textContent;
      startBtn.textContent = 'Đang mở tài liệu...';
      wpResetOrdinaryDocument();
      wpShowOrdinaryLoading(fileName);
      try {
        const arrayBuffer = await file.arrayBuffer();
        if (isPdf) await wpLoadOrdinaryPdf(file, arrayBuffer);
        else if (isDocx) await wpLoadOrdinaryDocx(file, arrayBuffer);
        else await wpLoadOrdinarySpreadsheet(file, arrayBuffer);
      } catch (error) {
        await wpClosePresenter();
        throw error;
      } finally {
        wpState.busy = false;
        startBtn.disabled = false;
        startBtn.textContent = oldText || 'Trình chiếu tài liệu';
        wpUpdateRegionButton();
      }
    }

    function wpCurrentQuestion() {
      return Array.isArray(wpState.questions) ? (wpState.questions[wpState.index] || null) : null;
    }

    function wpScanningAuthorized() {
      const tier = (typeof state !== 'undefined') ? String(state.sessionTier || '').trim().toLowerCase() : '';
      return !!(typeof state !== 'undefined' && state.token && ['trial', 'trail', 'full'].includes(tier));
    }

    function wpIsUnscoredScanSlide(question = wpCurrentQuestion()) {
      return wpState.documentMode === 'ordinary'
        || (presenter.dataset.lessonPlanPresentation === '1' && !!question
          && !['mc', 'tf'].includes(question.format));
    }

    function wpAccessBannerMode() {
      if (typeof state === 'undefined' || !state.token) return 'guest';
      const tier = String(state.sessionTier || '').trim().toLowerCase();
      if (tier === 'limited') return 'limited';
      return '';
    }

    function wpRestoreSubscriptionModalHost() {
      if (!wpState.subscriptionModalHostedInPresenter || !subscriptionModalEl || !wpSubscriptionModalHome || !wpSubscriptionModalHome.parent) {
        wpState.upgradeModalOpenFromPresentation = false;
        return;
      }
      const home = wpSubscriptionModalHome;
      try {
        const next = home.nextSibling && home.nextSibling.parentNode === home.parent ? home.nextSibling : null;
        home.parent.insertBefore(subscriptionModalEl, next);
      } catch (_) {
        try { home.parent.appendChild(subscriptionModalEl); } catch (_) {}
      }
      wpState.subscriptionModalHostedInPresenter = false;
      wpState.upgradeModalOpenFromPresentation = false;
      if (wordPresentationIsOpen()) wpRequestFit(true);
    }

    function wpRefreshAccessBanner() {
      const mode = wpAccessBannerMode();
      const visible = mode === 'guest' || mode === 'limited';
      const layoutChanged = accessBanner.hidden !== !visible
        || presenter.classList.contains('wp-access-guest') !== (mode === 'guest')
        || presenter.classList.contains('wp-access-limited') !== (mode === 'limited');
      if (accessBanner.hidden !== !visible) accessBanner.hidden = !visible;
      accessBanner.classList.toggle('is-guest', mode === 'guest');
      accessBanner.classList.toggle('is-limited', mode === 'limited');
      presenter.classList.toggle('wp-access-guest', mode === 'guest');
      presenter.classList.toggle('wp-access-limited', mode === 'limited');

      if (mode === 'guest') {
        accessMessageEl.textContent = 'Để sử dụng được đầy đủ các chức năng, bạn cần đăng nhập';
        accessActionBtn.textContent = 'Đăng nhập';
        accessActionBtn.title = 'Đến trang Đăng nhập';
      } else if (mode === 'limited') {
        accessMessageEl.textContent = 'Tài khoản miễn phí, một số chức năng không dùng được, bạn cần nâng cấp mvip';
        accessActionBtn.textContent = 'Nâng cấp mvip';
        accessActionBtn.title = 'Mở bảng Nâng cấp MVIP Full bằng VietQR';
      } else {
        accessMessageEl.textContent = '';
        accessActionBtn.textContent = '';
        accessActionBtn.removeAttribute('title');
      }

      // Session polling must not refit a slide whose access banner is unchanged.
      if (layoutChanged && wordPresentationIsOpen()) {
        requestAnimationFrame(() => wpRequestFit(true));
      }
    }

    async function wpGoToLoginPage() {
      if (window.mvipAccessLoginReturn && typeof window.mvipAccessLoginReturn.begin === 'function') {
        await window.mvipAccessLoginReturn.begin();
        return;
      }
      try { window.location.hash = '#dang-nhap'; } catch (_) {}
      requestAnimationFrame(() => {
        const loginSection = document.getElementById('dang-nhap');
        if (loginSection) {
          try { loginSection.scrollIntoView({ behavior: 'smooth', block: 'start' }); }
          catch (_) { try { loginSection.scrollIntoView(); } catch (_) {} }
        }
      });
    }

    function wpOpenUpgradeModal() {
      if (typeof state === 'undefined' || !state.token) {
        wpGoToLoginPage();
        return;
      }
      if (!subscriptionModalEl || typeof openSubscriptionModal !== 'function') {
        wpNotify('Không tìm thấy bảng Nâng cấp MVIP Full bằng VietQR.');
        return;
      }

      wpState.upgradeModalOpenFromPresentation = true;
      if (wordPresentationIsFullscreen() && !presenter.contains(subscriptionModalEl)) {
        try {
          presenter.appendChild(subscriptionModalEl);
          wpState.subscriptionModalHostedInPresenter = true;
        } catch (_) {}
      }

      try { openSubscriptionModal(); }
      catch (error) {
        wpRestoreSubscriptionModalHost();
        wpNotify(error && error.message ? error.message : 'Không mở được bảng nâng cấp MVIP.');
        return;
      }

      requestAnimationFrame(() => {
        if (!subscriptionModalEl || subscriptionModalEl.hidden) wpRestoreSubscriptionModalHost();
      });
    }

    function wpHandleAccessAction() {
      const mode = wpAccessBannerMode();
      if (mode === 'guest') {
        const pending = wpGoToLoginPage();
        if (pending && typeof pending.catch === 'function') pending.catch(() => {});
        return;
      }
      if (mode === 'limited') wpOpenUpgradeModal();
    }

    function wpScanSplitIsActive() {
      return !!wpState.scanSplitActive && document.body.classList.contains('word-presentation-scan-split');
    }

    function wpUsesRightControlPanel() {
      /* Trình chiếu câu hỏi Word và toàn bộ nhóm tài liệu thông thường
         PowerPoint/Word/PDF/Excel đều dùng chung bảng học sinh bên phải khi
         thu nhỏ. Toàn màn hình vẫn tự tháo bảng như trước. */
      return true;
    }

    function wpSyncScanSplitPanelText() {
      if (!wpScanSplitIsActive() || typeof els === 'undefined') return;
      const question = wpCurrentQuestion();
      const answered = wpValidLiveEntries().length;
      const mon = (typeof state !== 'undefined') ? String(state.currentMon || '') : '';
      let target = '';
      if (question) {
        target = `Câu ${wpQuestionDisplayNumber(question, wpState.index + 1)}`;
        if (question.format === 'tf' && wpState.activeTfLetter) target += ` · Ý ${wpState.activeTfLetter}`;
      }
      if (els.currentBoardTitle) els.currentBoardTitle.textContent = 'Danh sách học sinh đang nhận thẻ';
      if (els.currentBoardSub) {
        const parts = [mon, target, `${answered} học sinh đã quét`].filter(Boolean);
        els.currentBoardSub.textContent = parts.join(' · ');
      }
    }

    function wpSetScanSplit(active, options = {}) {
      const enabled = !!active && wordPresentationIsOpen() && !wpState.closing;
      const wasEnabled = !!wpState.scanSplitActive;
      const bodyHadClass = document.body.classList.contains('word-presentation-scan-split');
      const presenterHadClass = presenter.classList.contains('is-scan-split');
      const changed = enabled !== wasEnabled || bodyHadClass !== enabled || presenterHadClass !== enabled;

      if (enabled && !wasEnabled) {
        wpState.scanSplitHadDesktop = document.body.classList.contains('desktop-fixed-right');
        wpState.scanSplitForcedDesktop = false;
      }

      wpState.scanSplitActive = enabled;
      document.body.classList.toggle('word-presentation-scan-split', enabled);
      presenter.classList.toggle('is-scan-split', enabled);

      if (enabled) {
        /* Dùng đúng toàn bộ bảng bên phải của Kiểm tra ngay: Chọn Lớp-Môn,
           Chấm theo mã đề, Dùng câu hỏi của MVIP, Bài giảng và danh sách học
           sinh. Với màn hình máy tính chưa có desktop-fixed-right, chủ động
           gắn để bố cục xuất hiện ngay khi tải xong file Word/PowerPoint. */
        if (window.innerWidth > 760 && !document.body.classList.contains('desktop-fixed-right')) {
          document.body.classList.add('desktop-fixed-right');
          wpState.scanSplitForcedDesktop = true;
        }
        document.body.classList.remove('exam-mode-expanded');
        if (changed && typeof syncExamModeExpanded === 'function') {
          try { syncExamModeExpanded(); } catch (_) {}
        }
        if (changed && typeof renderCurrentBoard === 'function') {
          try { renderCurrentBoard(); } catch (_) {}
        }
        wpSyncScanSplitPanelText();
      } else {
        if (wpState.scanSplitForcedDesktop && !wpState.scanSplitHadDesktop) {
          document.body.classList.remove('desktop-fixed-right');
        }
        wpState.scanSplitForcedDesktop = false;
        wpState.scanSplitHadDesktop = false;
        if (typeof els !== 'undefined' && els.currentBoardTitle) {
          els.currentBoardTitle.textContent = 'Bảng học sinh đang quét';
        }
        if (changed && typeof updateCompactView === 'function') {
          try { updateCompactView(); } catch (_) {}
        }
      }

      const refreshLayout = (forceNow = false) => {
        wpSyncScanSplitPanelText();
        wpRequestFit(forceNow);
      };

      /* Chỉ tính lại khi trạng thái chia đôi thực sự đổi. Kích thước viewport
         phát sinh sau đó được ResizeObserver bắt đúng một lần, không tạo chuỗi
         immediate + rAF + 90 ms + 240 ms như trước. */
      if (options.fit !== false && (changed || options.forceFit === true)) {
        refreshLayout(true);
      }
    }

    function wpActivateScanSplit() {
      if (!wordPresentationIsOpen() || !wpScanningAuthorized()) return;
      if (wordPresentationIsFullscreen()) {
        /* Remote v25: giữ native fullscreen, chỉ co câu hỏi sang trái và đưa
           bảng học sinh realtime vào bên phải. Học sinh vẫn thấy tên mình bôi
           xanh nhưng điện thoại có thể mở rộng lại ngay sau khi Lưu. */
        if (typeof window.mvipRemoteScanViewRequested === 'function'
          && window.mvipRemoteScanViewRequested()
          && typeof window.mvipRemoteShowScanRoster === 'function') {
          try {
            if (window.mvipRemoteShowScanRoster(presenter)) return;
          } catch (_) {}
        }
        /* Thao tác quét không qua Remote vẫn giữ đúng cách cũ. */
        try {
          const result = wordPresentationExitFullscreen();
          if (result && typeof result.catch === 'function') result.catch(() => wpSetScanSplit(true));
        } catch (_) {
          wpSetScanSplit(true);
        }
        return;
      }
      wpSetScanSplit(true);
    }

    function wpFileUid(file, loadedName = '') {
      const source = [
        String(loadedName || (file && file.name) || ''),
        String((file && file.size) || 0),
        String((file && file.lastModified) || 0)
      ].join('|');
      let hash = 2166136261;
      for (let index = 0; index < source.length; index += 1) {
        hash ^= source.charCodeAt(index);
        hash = Math.imul(hash, 16777619);
      }
      return `word-${(hash >>> 0).toString(16)}-${String((file && file.size) || 0)}`;
    }

    function wpRefreshClassOptions(refreshScanUi = true) {
      const keys = (typeof state !== 'undefined')
        ? Object.keys(state.classData || {}).map((value) => (typeof normMonKey === 'function' ? normMonKey(value) : String(value || '').trim())).filter(Boolean).sort((a, b) => a.localeCompare(b, 'vi'))
        : [];
      const selected = (typeof state !== 'undefined') ? String(state.currentMon || '') : '';
      const optionsChanged = classSelect.options.length !== keys.length + 1
        || classSelect.options[0]?.value !== ''
        || keys.some((key, index) => classSelect.options[index + 1]?.value !== key
          || classSelect.options[index + 1]?.textContent !== key);
      if (optionsChanged) {
        classSelect.innerHTML = ['<option value="">Chọn lớp - môn</option>']
          .concat(keys.map((key) => `<option value="${wpEscape(key)}">${wpEscape(key)}</option>`))
          .join('');
      }
      const nextValue = selected && keys.includes(selected) ? selected : '';
      const selectionChanged = classSelect.value !== nextValue;
      if (selectionChanged) classSelect.value = nextValue;
      if (refreshScanUi || optionsChanged || selectionChanged) wpUpdateScanUi();
    }

    function wpRefreshAccess() {
      const authorized = wpScanningAuthorized();
      const changed = authorized !== wpState.scanAuthorized;
      wpState.scanAuthorized = authorized;
      /* Giữ nguyên các nút như tài khoản Full; quyền được kiểm tra khi bấm. */
      scanTools.hidden = false;
      resultBtn.hidden = false;
      presenter.classList.toggle('wp-scan-authorized', authorized);
      if (changed && !authorized) {
        wpState.activeTfLetter = '';
        wpState.scanPreviewed = false;
        if (typeof clearCurrentQuestion === 'function') clearCurrentQuestion();
      }
      wpRefreshAccessBanner();
      wpRefreshClassOptions(changed);
    }

    function wpRomanQuestionSection(value) {
      const raw = String(value || '').trim().toUpperCase();
      if (/^[IVXLCDM]+$/.test(raw)) return raw;
      const number = parseInt(raw, 10);
      if (!Number.isFinite(number) || number < 1 || number > 20) return '';
      const values = [
        [10, 'X'], [9, 'IX'], [5, 'V'], [4, 'IV'], [1, 'I']
      ];
      let remaining = number;
      let output = '';
      values.forEach(([unit, roman]) => {
        while (remaining >= unit) {
          output += roman;
          remaining -= unit;
        }
      });
      return output;
    }

    function wpDetectQuestionSectionHeading(line) {
      const raw = String(line || '').replace(/\s+/g, ' ').trim();
      if (!raw || raw.length > 320 || /^(?:Câu|Cau)\s*\d+/i.test(raw)) return null;
      const plain = wpPlainLower(raw);
      const match = plain.match(/^phan\s+([ivxlcdm]+|\d+)\b/i);
      if (!match) return null;
      const roman = wpRomanQuestionSection(match[1]);
      if (!roman) return null;
      return {
        roman,
        raw,
        plain,
      };
    }

    function wpDefaultFormatForQuestionSection(sectionRoman) {
      const roman = String(sectionRoman || '').trim().toUpperCase();
      if (roman === 'I') return 'mc';
      if (roman === 'II') return 'tf';
      if (roman === 'III') return 'short';
      if (roman === 'IV') return 'essay';
      return '';
    }

    function wpDetectFormatHeading(line) {
      const raw = String(line || '').replace(/\s+/g, ' ').trim();
      if (!raw || raw.length > 240 || /^(?:Câu|Cau)\s*\d+/i.test(raw)) return '';
      const plain = wpPlainLower(raw);
      const startsLikeHeading = /^(?:phan\s*(?:[ivxlcdm]+|\d+)?\b|[ivxlcdm]+\s*[\.\)\-–—:]+\s*|[a-d]\s*[\.\)]\s*(?:phan\s*)?|\d+\s*[\.\)]\s*(?:phan\s*)?|trac nghiem\b|tnkq\b|cau trac nghiem\b|dang\s*\d+\b|tra loi ngan\b|tu luan\b)/i.test(plain);
      if (!startsLikeHeading) return '';
      if (/\bdung\s*(?:-|–|—|\/|va)?\s*sai\b|\bdung sai\b/.test(plain)) return 'tf';
      if (/\btra loi ngan\b/.test(plain)) return 'short';
      if (/\btu luan\b/.test(plain)) return 'essay';
      if (/\bnhieu lua chon\b|\bnhieu phuong an\b|\bmot phuong an\b|\btrac nghiem khach quan\b|\btnkq\b|\btrac nghiem\b/.test(plain)) return 'mc';
      return '';
    }

    function wpQuestionStart(line, allowNumberOnly = false) {
      const raw = String(line || '').trim();
      if (!raw) return null;
      let match = raw.match(/^\s*(?:Câu|Cau)\s*(?:số\s*)?(\d{1,4})\b/i);
      if (match) {
        const labelMatch = raw.match(/^\s*((?:Câu|Cau)\s*(?:số\s*)?\d{1,4}(?:\s*[\(\[][^\)\]]{0,100}[\)\]])?)/i);
        const rawLabel = String(labelMatch && labelMatch[1] || `Câu ${match[1]}`)
          .replace(/^Cau\b/i, 'Câu')
          .replace(/[\s\.:：\-–—]+$/g, '')
          .trim();
        const restAfterLabel = labelMatch ? raw.slice(labelMatch[0].length) : '';
        const punctuationMatch = restAfterLabel.match(/^\s*([\.:：\)\-–—])/);
        const suffix = punctuationMatch ? String(punctuationMatch[1] || '.') : '.';
        const label = `${rawLabel || `Câu ${match[1]}`}${suffix}`;
        return { number: match[1], label, kind: 'cau' };
      }
      if (!allowNumberOnly) return null;
      match = raw.match(/^\s*(\d{1,4})\s*[\.\)]\s+(.+)$/);
      if (!match) return null;
      return { number: match[1], label: `Câu ${match[1]}.`, kind: 'number' };
    }

    /* Một ảnh DrawingML dạng anchor có thể được Word lưu trước phần chữ của
       chính đoạn chứa nhãn “Câu ...”. Khi bộ đọc giữ nguyên thứ tự XML, dòng
       nhận được có dạng [[CV7991_IMG:...]] Câu 15...; nếu chỉ kiểm tra đầu dòng
       thì câu mới bị ghép nhầm vào câu trước. Hàm này tách các ảnh đứng đầu,
       nhận diện nhãn câu trên phần chữ còn lại và gắn ảnh trở lại câu mới. */
    function wpQuestionStartAfterLeadingMedia(line, allowNumberOnly = false) {
      const source = String(line || '').trim();
      if (!source) return null;
      const leadingMedia = [];
      let remaining = source;
      const leadingImageRe = /^\s*(\[\[\s*CV7991_IMG\s*:[^\]]+\]\])\s*/i;
      let guard = 0;
      while (guard < 32) {
        const match = remaining.match(leadingImageRe);
        if (!match) break;
        const token = String(match[1] || '').trim();
        if (token) leadingMedia.push(token);
        remaining = remaining.slice(match[0].length).trim();
        guard += 1;
      }
      const start = wpQuestionStart(remaining, allowNumberOnly);
      if (!start) return null;
      return {
        start,
        line: remaining,
        leadingMedia,
      };
    }

    function wpStripQuestionPrefix(line, startInfo) {
      const raw = String(line || '').trim();
      if (!raw) return '';
      if (startInfo && startInfo.kind === 'number') {
        return raw.replace(/^\s*\d{1,4}\s*[\.\)]\s*/, '').trim();
      }
      return raw
        .replace(/^\s*(?:Câu|Cau)\s*(?:số\s*)?\d{1,4}(?:\s*[\(\[][^\)\]]{0,100}[\)\]])?\s*(?:[\.:：\)\]\-–—]+\s*)?/i, '')
        .trim();
    }

    function wpIsGlobalAnswerHeading(line) {
      const raw = String(line || '').replace(/\s+/g, ' ').trim();
      if (!raw || raw.length > 120) return false;
      const plain = wpPlainLower(raw).replace(/[\s:：.\-–—]+$/g, '').trim();
      return /^(?:dap an|dap an va thang diem|dap an va huong dan cham|dap an va huong dan giai|huong dan cham|huong dan giai va dap an)$/.test(plain);
    }

    /* Tài liệu bài giảng có thể dùng một trong hai kiểu mốc:
       - Kiểu cũ có số: “NDTC1:”, “Giải NDTC1:”, ...
       - Kiểu mới không số: mỗi dòng chỉ chứa đúng “NDTC” hoặc “Giải NDTC”.
       Với kiểu mới, bộ đọc tự cấp số nội bộ theo thứ tự xuất hiện từ đầu đến
       cuối file và ghép “Giải NDTC” với “NDTC” đứng trước gần nhất. Nhãn kỹ
       thuật không được trình chiếu; đoạn đầu tiên sau NDTC là tiêu đề riêng. */
    function wpNdtcMarkerInfo(line) {
      let raw = String(line || '').replace(/[\u200B-\u200D\uFEFF]/g, '').trim();
      if (!raw) return null;

      /* Ảnh DrawingML dạng anchor đôi khi đứng trước nhãn trong cùng dòng.
         Tách chúng ra để gắn lại vào đúng NDTC mới thay vì NDTC phía trước. */
      const leadingMedia = [];
      const leadingTokenRe = /^\s*(\[\[\s*CV7991_(?:IMG|TBL|OMML)\s*:[^\]]+\]\])\s*/i;
      let guard = 0;
      while (guard < 32) {
        const mediaMatch = raw.match(leadingTokenRe);
        if (!mediaMatch) break;
        const token = String(mediaMatch[1] || '').trim();
        if (token) leadingMedia.push(token);
        raw = raw.slice(mediaMatch[0].length).trim();
        guard += 1;
      }

      /* Chỉ dùng bản rút gọn này để xét dòng mốc. Nhờ vậy, các token định
         dạng nội bộ của Word không làm hỏng việc nhận diện dòng độc lập. */
      let markerText = raw;
      if (typeof cv7991StripAnswerHintTokens === 'function') {
        try { markerText = cv7991StripAnswerHintTokens(markerText); } catch (_) {}
      }
      markerText = String(markerText || '')
        .replace(/\[\[\s*CV7991_FMT_[^\]]+\]\]/gi, '')
        .replace(/<[^>]*>/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();

      /* Kiểu mới: cụm từ phải đứng độc lập cả dòng, không có số hoặc
         nội dung nào khác; dấu hai chấm ở cuối là tùy chọn. */
      if (/^(?:NDTC|Nội\s*dung\s*trình\s*chiếu|Noi\s*dung\s*trinh\s*chieu)\s*[:：]?$/i.test(markerText)) {
        return { kind:'content', number:'', body:'', leadingMedia, implicit:true };
      }
      if (/^(?:Giải|Giai)\s+(?:NDTC|Nội\s*dung\s*trình\s*chiếu|Noi\s*dung\s*trinh\s*chieu)\s*[:：]?$/i.test(markerText)) {
        return { kind:'solution', number:'', body:'', leadingMedia, implicit:true };
      }

      /* Giữ tương thích với tài liệu cũ có đánh số. */
      const match = raw.match(/^\s*(?:(Giải|Giai)\s*)?(?:NDTC|Nội\s*dung\s*trình\s*chiếu|Noi\s*dung\s*trinh\s*chieu)\s*0*(\d{1,4})\s*[:：]?\s*(.*)$/i);
      if (!match) return null;
      const numberValue = Math.max(1, parseInt(String(match[2] || '1'), 10) || 1);
      return {
        kind: match[1] ? 'solution' : 'content',
        number: String(numberValue),
        body: String(match[3] || '').trim(),
        leadingMedia,
        implicit:false,
      };
    }

    function wpIsNdtcStandaloneMediaLine(line) {
      const value = String(line || '').trim();
      /* Chỉ ảnh DrawingML dạng anchor có thể bị Word đặt trước nhãn của đoạn kế tiếp.
         Bảng và Equation đứng riêng là nội dung thật của NDTC/Giải NDTC hiện tại,
         nên tuyệt đối không chuyển chúng sang NDTC sau. */
      return /^(?:\[\[\s*CV7991_IMG\s*:[^\]]+\]\]\s*)+$/i.test(value);
    }

    /* “***Hết NDTC***” là ranh giới cứng của một cụm nội dung trình chiếu.
       Từ ranh giới này đến mốc NDTC/Giải NDTC tiếp theo, mọi đoạn của kế hoạch
       bài dạy đều nằm ngoài phạm vi trình chiếu và phải được bỏ qua. */
    function wpIsNdtcEndMarker(line) {
      let value = String(line || '')
        .replace(/[\u200B-\u200D\uFEFF]/g, '')
        .trim();
      if (!value) return false;

      /* Bỏ các token định dạng nội bộ nhưng không bỏ dấu * của chính mốc. */
      if (typeof cv7991StripAnswerHintTokens === 'function') {
        try { value = cv7991StripAnswerHintTokens(value); } catch (_) {}
      }
      value = value
        .replace(/\[\[\s*CV7991_(?:IMG|TBL|OMML|ANS)\s*:[^\]]+\]\]/gi, ' ')
        .replace(/\[\[\s*CV7991_FMT_[^\]]+\]\]/gi, '')
        .replace(/<[^>]*>/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();

      return /^\*{3,}\s*(?:Hết|Het)\s+NDTC\s*\*{3,}$/i.test(value);
    }

    function wpIsNdtcIgnoredBoundaryLine(line) {
      const value = String(line || '').replace(/\s+/g, ' ').trim();
      if (!value) return false;
      const plain = wpPlainLower(value);
      if (/^phan\s+(?:[ivxlcdm]+|\d+)\b/.test(plain)) return true;
      if (/^bai\s+\d+(?:[\.:]\s*|\s+).* -?\s*toan\s+\d+\b/.test(plain)) return true;
      if (/^trang\s+\d{1,4}$/.test(plain)) return true;
      return false;
    }

    function wpParseNdtcHttcLine(line) {
      const raw = String(line || '').replace(/[​-‍﻿]/g, '').trim();
      if (!raw) return null;
      const match = raw.match(/^HTTC\s*:\s*(.+)$/i);
      if (!match) return null;
      const plain = wpPlainLower(String(match[1] || '').replace(/\s+/g, ' ').trim());
      if (/^(?:ca\s*nhan|cá\s*nhân)$/.test(plain)) return { code:'CN', label:'Cá nhân' };
      if (/^(?:nhom\s*doi|nhóm\s*đôi)$/.test(plain)) return { code:'NĐ', label:'Nhóm đôi' };
      if (/^(?:nhom\s*lon|nhóm\s*lớn)$/.test(plain)) return { code:'NL', label:'Nhóm lớn' };
      return null;
    }

    function wpNdtcTitleVisibleText(line) {
      let value = String(line || '').trim();
      if (!value) return '';
      if (typeof cv7991StripAnswerHintTokens === 'function') {
        try { value = cv7991StripAnswerHintTokens(value); } catch (_) {}
      }
      return value
        .replace(/\[\[\s*CV7991_(?:IMG|TBL|OMML|ANS)\s*:[^\]]+\]\]/gi, ' ')
        .replace(/\[\[\s*CV7991_FMT_[^\]]+\]\]/gi, '')
        .replace(/<[^>]*>/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
    }

    function wpNdtcTitleInfo(contentLines, fallbackNumber) {
      const lines = Array.isArray(contentLines) ? contentLines.slice() : [];
      let titleIndex = -1;
      for (let index = 0; index < lines.length; index += 1) {
        if (wpNdtcTitleVisibleText(lines[index])) {
          titleIndex = index;
          break;
        }
      }

      if (titleIndex < 0) {
        /* NDTC chỉ có ảnh/bảng thì KHÔNG tự tạo tiêu đề “Nội dung 1, 2…”. */
        return { titleRich:'', titleText:'', bodyLines:lines };
      }
      /* Nếu NDTC bắt đầu ngay bằng a)/b)/c)/d) thì đó là ý đầu tiên,
         không phải tiêu đề. Áp dụng cả nhãn Word tự đánh số và gõ tay,
         để các ý không bị lệch/mất trước khi trình chiếu. */
      if (/^(?:[a-d]|[1-4])\s*[.\)\]:：]\s*/i.test(wpNdtcTitleVisibleText(lines[titleIndex]))) {
        return { titleRich:'', titleText:'', bodyLines:lines };
      }

      let titleRich = String(lines[titleIndex] || '').trim();
      if (typeof cv7991StripAnswerHintTokens === 'function') {
        try { titleRich = cv7991StripAnswerHintTokens(titleRich); } catch (_) {}
      }

      /* Ảnh/bảng bị neo vào đầu cùng đoạn với tiêu đề phải tiếp tục nằm trong
         nội dung, không bị đưa vào chính dòng tiêu đề căn giữa. Equation/OMML
         vẫn được giữ vì tiêu đề có thể chứa một biểu thức toán học. */
      const detachedMedia = [];
      titleRich = titleRich.replace(/\[\[\s*CV7991_(?:IMG|TBL)\s*:[^\]]+\]\]/gi, (token) => {
        detachedMedia.push(String(token || '').trim());
        return ' ';
      }).replace(/\s{2,}/g, ' ').trim();

      /* Giữ đúng tiêu đề có thật trong Word; không tự thêm nội dung giả. */
      const titleText = wpNdtcTitleVisibleText(titleRich);
      const bodyLines = lines.slice(0, titleIndex)
        .concat(detachedMedia)
        .concat(lines.slice(titleIndex + 1));
      return { titleRich:titleRich || titleText, titleText, bodyLines };
    }

    function wpSplitNdtcBlocks(text, imageMap = {}) {
      const lines = String(text || '').replace(/\r/g, '').split('\n').map((line) => String(line == null ? '' : line).trim());
      /* Thứ tự trình chiếu là thứ tự xuất hiện thực tế của từng NDTC trong Word,
         KHÔNG phải số ghi sau NDTC. Hai NDTC3 khác vị trí là hai mục độc lập. */
      const records = [];
      let current = null;
      let activeKind = '';
      let implicitSequence = 0;
      let scopeStartIndex = 0;

      const createRecord = (number, implicit = false) => {
        const record = {
          number:String(number || '').trim(),
          contentLines:[],
          solutionLines:[],
          implicit:!!implicit,
          hasSolutionMarker:false,
        };
        records.push(record);
        return record;
      };

      const createImplicitRecord = () => {
        implicitSequence += 1;
        return createRecord(String(implicitSequence), true);
      };

      const findPreviousContentForSolution = (number) => {
        const key = String(number || '').trim();
        /* Ưu tiên NDTC cùng số gần nhất, chưa có phần Giải. Chỉ tìm trong
           cụm hiện tại, không vượt qua ranh giới ***Hết NDTC***. */
        for (let i = records.length - 1; i >= scopeStartIndex; i -= 1) {
          const record = records[i];
          if (record.number === key && !record.hasSolutionMarker) return record;
        }
        return null;
      };

      for (let index = 0; index < lines.length; index += 1) {
        const line = lines[index];

        /* Kết thúc hoàn toàn khối đang đọc. Sau đó bộ đọc chỉ tiếp tục khi
           gặp một mốc NDTC/Giải NDTC mới; nội dung kế hoạch bài dạy xen giữa
           không được ghép vào NDTC vừa kết thúc. */
        if (wpIsNdtcEndMarker(line)) {
          current = null;
          activeKind = '';
          scopeStartIndex = records.length;
          continue;
        }

        const marker = wpNdtcMarkerInfo(line);
        if (marker) {
          if (marker.kind === 'content') {
            /* MỖI mốc NDTC mở một bản ghi mới, dù số có trùng hoặc giảm.
               Do đó NDTC3, NDTC2, NDTC3 đều trình chiếu đúng thứ tự này. */
            current = marker.implicit
              ? createImplicitRecord()
              : createRecord(marker.number);
          } else if (marker.implicit) {
            /* “Giải NDTC” không số thuộc NDTC vừa gặp trong cùng cụm. */
            if (!current) {
              activeKind = '';
              continue;
            }
          } else {
            /* Ghép Giải NDTCn vào lần xuất hiện phù hợp gần nhất, KHÔNG
               gộp tất cả các NDTC cùng số thành một câu trình chiếu. */
            const solutionNumber = String(marker.number || '').trim();
            const matchesCurrent = current && current.number === solutionNumber;
            if (!(matchesCurrent && (activeKind === 'content' || activeKind === 'solution'))) {
              current = findPreviousContentForSolution(solutionNumber);
            }
            if (!current) {
              activeKind = '';
              continue;
            }
          }

          activeKind = marker.kind;
          if (activeKind === 'solution') current.hasSolutionMarker = true;
          const target = activeKind === 'solution' ? current.solutionLines : current.contentLines;
          if (marker.leadingMedia.length) target.push(...marker.leadingMedia);
          if (marker.body) target.push(marker.body);
          continue;
        }

        if (!current) continue;

        /* Ảnh nằm trên dòng riêng thuộc NDTC/Giải NDTC đang mở, kể cả
           khi ngay sau ảnh là mốc NDTC mới. Không chuyển ảnh qua ranh giới.
           Media cùng dòng với mốc vẫn được xử lý bằng marker.leadingMedia. */

        if (wpIsNdtcIgnoredBoundaryLine(line)) continue;
        const target = activeKind === 'solution' ? current.solutionLines : current.contentLines;
        target.push(line);
      }

      const trimEdges = (source) => {
        const list = Array.isArray(source) ? source.slice() : [];
        while (list.length && !String(list[0] || '').trim()) list.shift();
        while (list.length && !String(list[list.length - 1] || '').trim()) list.pop();
        return list;
      };

      return records.map((record, index) => {
        const contentLines = trimEdges(record.contentLines);
        const solutionLines = trimEdges(record.solutionLines);
        if (!contentLines.some((line) => String(line || '').trim())) return null;
        const number = String(record.number || index + 1);
        let httcCode = '';
        const sanitizedContentLines = [];
        contentLines.forEach((line) => {
          const info = wpParseNdtcHttcLine(line);
          if (info) { httcCode = info.code || httcCode; return; }
          sanitizedContentLines.push(line);
        });
        const titleInfo = wpNdtcTitleInfo(trimEdges(sanitizedContentLines), number);
        const combinedLines = trimEdges(titleInfo.bodyLines);
        if (solutionLines.some((line) => String(line || '').trim())) {
          combinedLines.push('Hướng dẫn giải:');
          combinedLines.push(...solutionLines);
        }
        return {
          start: { number, label:titleInfo.titleText, kind:'ndtc' },
          formatHint:'',
          sectionRoman:'',
          sectionHeading:'',
          lines:combinedLines,
          noQuestionPrefix:true,
          isNdtc:true,
          ndtcNumber:number,
          ndtcTitle:titleInfo.titleRich,
          ndtcTitleText:titleInfo.titleText,
          answerLabel:'Đáp án',
          httcCode,
        };
      }).filter(Boolean);
    }

    function wpSplitQuestionBlocks(text) {
      const lines = String(text || '').replace(/\r/g, '').split('\n').map((line) => String(line || '').trim());
      const explicitCount = lines.reduce((sum, line) => sum + (wpQuestionStartAfterLeadingMedia(line, false) ? 1 : 0), 0);
      const numberedCandidates = explicitCount ? 0 : lines.reduce((sum, line) => {
        if (wpDetectFormatHeading(line)) return sum;
        return sum + (wpQuestionStartAfterLeadingMedia(line, true) ? 1 : 0);
      }, 0);
      const allowNumberOnly = !explicitCount && numberedCandidates >= 2;
      const blocks = [];
      let current = null;
      let activeFormat = '';
      let activeSectionRoman = '';
      let activeSectionHeading = '';
      let stopAtAnswerKey = false;

      const pushCurrent = () => {
        if (current && Array.isArray(current.lines) && current.lines.some((line) => String(line || '').trim())) blocks.push(current);
        current = null;
      };

      lines.forEach((line) => {
        if (stopAtAnswerKey) return;
        if (wpIsGlobalAnswerHeading(line)) {
          const currentLines = current && Array.isArray(current.lines) ? current.lines : [];
          const currentHasChoiceMarkers = currentLines.slice(1).some((item) => /^\s*[A-Da-d]\s*[\.\)\]:：]\s*/.test(String(item || '')));
          const currentFormat = String(current && current.formatHint || '');
          const currentUpperLayout = wpChoiceLayoutFromLines(currentLines, 'ABCD');
          const currentLowerLayout = wpChoiceLayoutFromLines(currentLines, 'abcd');
          /* Một câu tự luận nhiều ý cũng dùng a/b/c/d nhưng không có tín hiệu
             Đúng–Sai. Trong trường hợp đó, dòng “Đáp án:” rỗng là phần mở đầu
             lời giải của chính câu đang xét, không phải bảng đáp án chung cuối file. */
          const looksLikeMultipartEssay = currentLowerLayout.count >= 2
            && currentUpperLayout.count < 2
            && !wpHasTrueFalsePromptCue(currentLines);
          const looksLikeLocalOpenAnswer = !!current && (
            !currentHasChoiceMarkers
            || currentFormat === 'short'
            || currentFormat === 'essay'
            || looksLikeMultipartEssay
          );
          if (looksLikeLocalOpenAnswer) {
            current.lines.push(line);
            return;
          }
          pushCurrent();
          stopAtAnswerKey = true;
          return;
        }
        const sectionHeading = wpDetectQuestionSectionHeading(line);
        if (sectionHeading) {
          pushCurrent();
          activeSectionRoman = sectionHeading.roman;
          activeSectionHeading = sectionHeading.raw;
          /* Mỗi phần là một ngữ cảnh mới. Không để định dạng của PHẦN II
             (Đúng–Sai) bị truyền sang PHẦN III khi tiêu đề PHẦN III chỉ ghi
             “Thí sinh trả lời từ câu 1 đến câu 6”. */
          activeFormat = wpDetectFormatHeading(line)
            || wpDefaultFormatForQuestionSection(activeSectionRoman)
            || '';
          return;
        }
        const headingFormat = wpDetectFormatHeading(line);
        if (headingFormat) {
          pushCurrent();
          activeFormat = headingFormat;
          return;
        }
        const questionLine = wpQuestionStartAfterLeadingMedia(line, allowNumberOnly);
        if (questionLine) {
          pushCurrent();
          current = {
            start: questionLine.start,
            formatHint: activeFormat,
            sectionRoman: activeSectionRoman,
            sectionHeading: activeSectionHeading,
            // Đặt nhãn câu trước rồi mới chèn lại ảnh anchor để ảnh thuộc đúng câu mới.
            lines: [questionLine.line].concat(questionLine.leadingMedia || []),
          };
          return;
        }
        if (current) current.lines.push(line);
      });
      pushCurrent();

      if (!blocks.length) {
        const useful = lines.filter((line) => line && !wpIsGlobalAnswerHeading(line));
        if (useful.length) {
          blocks.push({
            start: { number: '1', label: 'Câu 1.', kind: 'fallback' },
            formatHint: activeFormat,
            sectionRoman: activeSectionRoman,
            sectionHeading: activeSectionHeading,
            lines: useful,
            noQuestionPrefix: true,
          });
        }
      }
      return blocks;
    }

    function wpIsSolutionStart(line) {
      const raw = String(line || '').trim();
      if (!raw) return false;
      if (typeof cv7991GuideStartInfo === 'function') {
        try { if (cv7991GuideStartInfo(raw)) return true; } catch (_) {}
      }
      const filledShortAnswer = raw.match(/^(?:Đáp\s*số|Kết\s*quả|Trả\s*lời)\s*[:：]\s*(.*)$/i);
      if (filledShortAnswer) {
        const answerBody = String(filledShortAnswer[1] || '').trim();
        if (answerBody && !/^[._…\-–—\s]+$/.test(answerBody)) return true;
      }
      return /^(?:Đáp\s*án(?:\s*đúng)?|ĐA|Hướng\s*dẫn(?:\s*giải|\s*chấm)?|Lời\s*giải|Gợi\s*ý\s*đáp\s*án|Đáp\s*án\s*và\s*thang\s*điểm)\s*[:：]/i.test(raw)
        || /^(?:Đáp\s*án|Hướng\s*dẫn\s*chấm|Đáp\s*án\s*và\s*thang\s*điểm)\s*$/i.test(raw);
    }

    function wpAnswerLineInfo(line) {
      const raw = String(line || '').trim();
      if (!raw) return null;

      /* “Kết quả”, “Trả lời”, “Đáp số” có thể là từ mở đầu của một câu văn
         bình thường, ví dụ “Kết quả thu được khi quét thử nghiệm...”. Bản cũ
         coi mọi dòng bắt đầu bằng “Kết quả” là phần đáp án, nên toàn bộ đoạn
         mô tả tiếp theo và các ý a), b), c), d) của câu bị tách khỏi đề bài.
         Với ba nhãn ngắn này, chỉ nhận là đáp án khi có dấu hai chấm hoặc khi
         cả dòng chỉ đúng là tên nhãn. */
      let match = raw.match(/^(Đáp\s*số|Kết\s*quả|Trả\s*lời)\s*[:：]\s*(.*)$/i);
      if (!match) match = raw.match(/^(Đáp\s*số|Kết\s*quả|Trả\s*lời)\s*$/i);

      /* Các nhãn đáp án/lời giải rõ nghĩa vẫn được phép không có dấu hai chấm
         để tương thích với các file Word cũ. Riêng chữ viết tắt “ĐA” phải được
         nhận theo đúng chữ hoa. Nếu dùng cờ /i ở đây, đầu câu “Đa thức...”,
         “Đa giác...” sẽ bị cắt chữ “Đa” và bị chuyển nhầm sang phần đáp án. */
      if (!match) {
        match = raw.match(/^(Đáp\s*án(?:\s*đúng)?|Hướng\s*dẫn(?:\s*giải|\s*chấm)?|Lời\s*giải|Gợi\s*ý\s*đáp\s*án|Đáp\s*án\s*và\s*thang\s*điểm)\s*[:：]?\s*(.*)$/i);
      }
      if (!match) {
        const shortAnswer = raw.match(/^ĐA(?:\s*[:：]?\s*(.*))?$/);
        if (shortAnswer) match = ['', 'ĐA', String(shortAnswer[1] || '').trim()];
      }
      if (!match) return null;
      const rawLabel = String(match[1] || '').trim();
      const body = String(match[2] || '').trim();
      const isGuideLabel = /(?:hướng\s*dẫn|lời\s*giải|gợi\s*ý|thang\s*điểm)/i.test(rawLabel);
      const normalizedLabel = isGuideLabel
        ? 'Lời giải'
        : (/(?:trả\s*lời|kết\s*quả)/i.test(rawLabel) ? 'Trả lời' : 'Đáp án');
      return { label: normalizedLabel, body, kind: isGuideLabel ? 'guide' : 'answer' };
    }

    function wpSplitInlineAnswerSegment(line) {
      const raw = String(line || '');
      const match = raw.match(/\s+(Đáp\s*án(?:\s*đúng)?|ĐA|Đáp\s*số|Kết\s*quả|Trả\s*lời|Hướng\s*dẫn(?:\s*giải|\s*chấm)?|Lời\s*giải|Gợi\s*ý\s*đáp\s*án|Đáp\s*án\s*và\s*thang\s*điểm)\s*[:：]\s*(.*)$/i);
      if (!match || match.index == null || match.index < 1) return null;
      const rawLabel = String(match[1] || '');
      const isGuideLabel = /(?:hướng\s*dẫn|lời\s*giải|gợi\s*ý|thang\s*điểm)/i.test(rawLabel);
      const label = isGuideLabel ? 'Lời giải' : (/(?:trả\s*lời|kết\s*quả)/i.test(rawLabel) ? 'Trả lời' : 'Đáp án');
      return { text: raw.slice(0, match.index).trim(), label, body: String(match[2] || '').trim(), kind: isGuideLabel ? 'guide' : 'answer' };
    }

    function wpNormalizeCollectedLines(lines) {
      const normalized = [];
      (Array.isArray(lines) ? lines : []).forEach((line) => {
        const value = String(line == null ? '' : line).trim();
        // Đoạn Word rỗng không mang nội dung trình chiếu; bỏ hẳn thay vì tạo
        // một hàng <br> rỗng có chiều cao rất lớn sau khi phóng cỡ chữ.
        if (!value) return;
        normalized.push(value);
      });
      return normalized;
    }

    function wpMeaningfulAnswerText(value) {
      const compact = String(value || '').replace(/[\s ]+/g, '').replace(/[.:;,_\-–—()\[\]{}]+/g, '');
      return !!compact;
    }

    function wpSequentialMarkerCount(lines, letters) {
      const expected = String(letters || '').split('');
      let index = 0;
      (Array.isArray(lines) ? lines : []).forEach((line) => {
        const marker = String(line || '').match(/^\s*([A-Da-d])\s*[\.\)\]:：]\s*/);
        if (!marker || index >= expected.length) return;
        if (String(marker[1]) === expected[index]) index += 1;
      });
      return index;
    }

    function wpChoiceLayoutFromLines(lines, letters) {
      const list = Array.isArray(lines) ? lines.map((line) => String(line == null ? '' : line)) : [];
      const sequence = String(letters || '');
      const expected = sequence.split('');
      const normalizeLetters = (items) => (Array.isArray(items) ? items : [])
        .map((item) => String(item && item.letter || '')).join('');
      const parseInline = (line, options) => {
        if (typeof cv7991ParseInlineChoices !== 'function') return [];
        try { return cv7991ParseInlineChoices(line, sequence, options || {}); } catch (_) { return []; }
      };

      // A... B... C... D... trên cùng một đoạn Word.
      for (const line of list) {
        const items = parseInline(line, { requireCompleteSequence: true });
        if (items.length === expected.length && normalizeLetters(items) === sequence) {
          return { count: items.length, columns: items.length };
        }
      }

      // Hai đoạn liên tiếp A/B và C/D như cách Word trình bày 2 hàng x 2 cột.
      if (expected.length === 4) {
        for (let index = 0; index + 1 < list.length; index += 1) {
          const first = parseInline(list[index], { minItems: 2 });
          const second = parseInline(list[index + 1], { minItems: 2 });
          if (first.length === 2 && second.length === 2
            && normalizeLetters(first) === sequence.slice(0, 2)
            && normalizeLetters(second) === sequence.slice(2)) {
            return { count: 4, columns: 2 };
          }
        }
      }

      // Bốn đoạn riêng A, B, C, D.
      const sequentialCount = wpSequentialMarkerCount(list, sequence);
      if (sequentialCount >= expected.length) return { count: sequentialCount, columns: 1 };
      return { count: sequentialCount, columns: 0 };
    }

    function wpHasTrueFalsePromptCue(lines) {
      const source = Array.isArray(lines) ? lines.join(' ') : String(lines || '');
      const plain = wpPlainLower(source);
      return /\bdung\s*(?:-|–|—|\/|va)?\s*sai\b/.test(plain)
        || /\bdung\s+hay\s+sai\b/.test(plain)
        || /\by\s*nao\s+dung\b.{0,100}\by\s*nao\s+sai\b/.test(plain)
        || /\bxet\s+(?:cac\s+)?y\b.{0,120}\bdung\b.{0,80}\bsai\b/.test(plain)
        || /\bxac\s*dinh\b.{0,120}\bdung\b.{0,80}\bsai\b/.test(plain);
    }

    function wpPlainLowerPreserveLines(value) {
      return String(value || '')
        .replace(/\r/g, '')
        .normalize('NFD')
        .replace(/[\u0300-\u036f]/g, '')
        .replace(/đ/g, 'd')
        .replace(/Đ/g, 'D')
        .toLowerCase()
        .replace(/[ \t\f\v]+/g, ' ')
        .replace(/ *\n */g, '\n')
        .replace(/\n{2,}/g, '\n')
        .trim();
    }

    function wpStructuredTfPairs(answerText) {
      const plain = wpPlainLowerPreserveLines(answerText);
      if (!plain) return [];
      /* Chỉ chấp nhận khi toàn bộ phần đáp án là danh sách cặp có cấu trúc,
         ví dụ “a S; b Đ; c S; d Đ” hoặc mỗi cặp nằm trên một dòng. Nhờ vậy
         các tên điểm AD, CF, A, F... trong lời giải hình học không bị hiểu nhầm. */
      const fullPairPattern = /^(?:\s*[a-d]\s*[\)\].:：=]?\s*(?:dung|d|true|sai|s|false)\s*(?:[,;|\/\n\-–—]+|$)){2,}$/i;
      if (!fullPairPattern.test(plain)) return [];
      const pairs = [];
      const pairPattern = /(?:^|[\n,;|\/\-–—])\s*([a-d])\s*[\)\].:：=]?\s*(dung|d|true|sai|s|false)(?=$|[\s,;|\/\-–—])/gi;
      let match;
      while ((match = pairPattern.exec(plain))) {
        pairs.push({ letter: String(match[1] || '').toLowerCase(), state: String(match[2] || '').toLowerCase() });
      }
      return pairs;
    }

    function wpStructuredTfStatuses(answerText) {
      const plain = wpPlainLowerPreserveLines(answerText);
      if (!plain) return [];
      const fullStatusPattern = /^(?:(?:dung|d|true|sai|s|false)(?:[\s,;|\/\-–—]+|$)){2,}$/i;
      if (!fullStatusPattern.test(plain)) return [];
      return plain.match(/(?:dung|d|true|sai|s|false)/gi) || [];
    }

    function wpHasTrueFalseAnswerSignal(answerText, answerHintLetters, lowerLayout) {
      const raw = String(answerText || '');
      const hintLetters = Array.isArray(answerHintLetters)
        ? answerHintLetters.map((item) => String(item || '').trim()).filter(Boolean)
        : [];
      const expectedCount = Math.max(0, Number(lowerLayout && lowerLayout.count) || 0);

      /* Bôi đỏ/gạch chân nhãn a/b/c/d được bộ đọc Word chuyển thành danh sách
         chữ cái đáp án. Đây là tín hiệu Đúng–Sai độc lập với hình thức câu hỏi. */
      if (expectedCount >= 2 && hintLetters.length) return true;
      if (wpStructuredTfPairs(raw).length >= 2) return true;
      const statuses = wpStructuredTfStatuses(raw);
      return expectedCount >= 2 && statuses.length >= expectedCount;
    }

    function wpInferFormat(lines, hint, signals = {}) {
      const normalizedHint = String(hint || '');
      if (['mc', 'tf', 'short', 'essay'].includes(normalizedHint)) return normalizedHint;
      const list = Array.isArray(lines) ? lines : [];
      const joinedPlain = wpPlainLower(list.join(' '));
      const upperLayout = wpChoiceLayoutFromLines(list, 'ABCD');
      const lowerLayout = wpChoiceLayoutFromLines(list, 'abcd');

      if (upperLayout.count >= 2) return 'mc';

      const hasTfSignal = wpHasTrueFalsePromptCue(list)
        || wpHasTrueFalseAnswerSignal(signals.answerText, signals.answerHintLetters, lowerLayout);
      if (lowerLayout.count >= 2) return hasTfSignal ? 'tf' : 'essay';
      if (hasTfSignal && lowerLayout.count >= 1) return 'tf';
      if (/\btra loi ngan\b|\btra loi\s*[:：]/.test(joinedPlain)) return 'short';
      return 'essay';
    }

    function wpPrepareBlock(block, fallbackIndex) {
      const sourceLines = Array.isArray(block && block.lines) ? block.lines : [];
      const cleaned = [];
      const answerLines = [];
      const guideLines = [];
      const answerHintLetters = [];
      let collectingAnswer = false;
      let collectingGuide = false;
      let answerLabel = '';

      sourceLines.forEach((line, index) => {
        let value = String(line || '').trim();
        if (!value) {
          if (collectingAnswer) {
            if (answerLines.length && answerLines[answerLines.length - 1] !== '') answerLines.push('');
          } else if (collectingGuide) {
            if (guideLines.length && guideLines[guideLines.length - 1] !== '') guideLines.push('');
          } else if (cleaned.length && cleaned[cleaned.length - 1] !== '') {
            cleaned.push('');
          }
          return;
        }

        if (index === 0 && !block.noQuestionPrefix) value = wpStripQuestionPrefix(value, block.start);
        if (/^(?:Năng\s*lực|Nang\s*luc)\s*:/i.test(value)) return;

        if (!collectingAnswer && !collectingGuide && (typeof cv7991ExtractAnswerHintsFromLine === 'function' || typeof cv7991ExtractAnswerHintFromLine === 'function')) {
          try {
            const hintedLetters = typeof cv7991ExtractAnswerHintsFromLine === 'function'
              ? cv7991ExtractAnswerHintsFromLine(value)
              : [cv7991ExtractAnswerHintFromLine(value)];
            hintedLetters.forEach((hintedLetter) => {
              if (hintedLetter && !answerHintLetters.includes(hintedLetter)) answerHintLetters.push(hintedLetter);
            });
          } catch (_) {}
        }

        if (!collectingAnswer && !collectingGuide) {
          const answerStart = wpAnswerLineInfo(value);
          if (answerStart) {
            if (answerStart.kind === 'guide') {
              collectingGuide = true;
              collectingAnswer = false;
              if (answerStart.body) guideLines.push(answerStart.body);
            } else {
              collectingAnswer = true;
              collectingGuide = false;
              answerLabel = answerStart.label || 'Đáp án';
              if (answerStart.body) answerLines.push(answerStart.body);
            }
            return;
          }
          const inlineAnswer = wpSplitInlineAnswerSegment(value);
          if (inlineAnswer) {
            const safeContent = String(inlineAnswer.text || '').trim();
            if (safeContent) {
              let contentValue = safeContent;
              if (typeof cv7991StripAnswerHintTokens === 'function') {
                try { contentValue = cv7991StripAnswerHintTokens(contentValue); } catch (_) {}
              }
              if (contentValue) cleaned.push(contentValue);
            }
            if (inlineAnswer.kind === 'guide') {
              collectingGuide = true;
              collectingAnswer = false;
              if (inlineAnswer.body) guideLines.push(inlineAnswer.body);
            } else {
              collectingAnswer = true;
              collectingGuide = false;
              answerLabel = inlineAnswer.label || 'Đáp án';
              if (inlineAnswer.body) answerLines.push(inlineAnswer.body);
            }
            return;
          }
          if (typeof cv7991StripAnswerHintTokens === 'function') {
            try { value = cv7991StripAnswerHintTokens(value); } catch (_) {}
          }
          if (value) cleaned.push(value);
          return;
        }

        if (collectingGuide) {
          const nestedAnswer = wpAnswerLineInfo(value);
          if (nestedAnswer && nestedAnswer.kind !== 'guide') {
            collectingAnswer = true;
            collectingGuide = false;
            if (!answerLabel) answerLabel = nestedAnswer.label || 'Đáp án';
            if (nestedAnswer.body) answerLines.push(nestedAnswer.body);
            return;
          }
          if (nestedAnswer && nestedAnswer.body) guideLines.push(nestedAnswer.body);
          else guideLines.push(value);
          return;
        }

        const nestedAnswer = wpAnswerLineInfo(value);
        if (nestedAnswer) {
          if (nestedAnswer.kind === 'guide') {
            collectingGuide = true;
            collectingAnswer = false;
            if (nestedAnswer.body) guideLines.push(nestedAnswer.body);
          } else {
            if (!answerLabel) answerLabel = nestedAnswer.label || 'Đáp án';
            if (nestedAnswer.body) answerLines.push(nestedAnswer.body);
          }
          return;
        }
        answerLines.push(value);
      });

      const normalizedContentLines = wpNormalizeCollectedLines(cleaned);
      const normalizedAnswerLines = wpNormalizeCollectedLines(answerLines);
      const normalizedGuideLines = wpNormalizeCollectedLines(guideLines);
      const isNdtc = !!(block && block.isNdtc);
      const ndtcTitle = String(block && block.ndtcTitle || '').trim();
      const ndtcTitleText = String(block && block.ndtcTitleText || wpNdtcTitleVisibleText(ndtcTitle) || '').trim();
      const displayText = normalizedContentLines.join('\n').replace(/\n{3,}/g, '\n\n').trim();
      if (!displayText && !(isNdtc && (ndtcTitle || ndtcTitleText))) return null;
      if (!isNdtc && normalizedContentLines.length <= 2 && /^(?:[A-D]|[ĐDS])(?:\s*[,;]\s*[A-DĐDS])*$/i.test(wpPlainLower(displayText).toUpperCase())) return null;

      const number = String(block && block.start && block.start.number || fallbackIndex + 1);
      const label = String(block && block.start && block.start.label || `Câu ${number}.`).trim() || `Câu ${number}.`;
      const explicitAnswerText = normalizedAnswerLines.join('\n').replace(/\n{3,}/g, '\n\n').trim();
      const answerText = explicitAnswerText || (answerHintLetters.length ? answerHintLetters.join(', ') : '');
      let format = '';
      if (isNdtc) {
        /* Với NDTC, chỉ coi là trắc nghiệm khi vừa có đủ cấu trúc lựa chọn
           A/B/C/D hoặc a/b/c/d, vừa có tín hiệu đáp án do người soạn đánh dấu.
           Mọi trường hợp khác luôn là Tự luận, đúng yêu cầu ưu tiên của mẫu NDTC. */
        const upperLayout = wpChoiceLayoutFromLines(normalizedContentLines, 'ABCD');
        const lowerLayout = wpChoiceLayoutFromLines(normalizedContentLines, 'abcd');
        const markedLetters = wpUniqueLetters(answerHintLetters)
          .map((value) => String(value || '').trim().toUpperCase())
          .filter((value) => /^[A-D]$/.test(value));
        if (upperLayout.count >= 4 && markedLetters.length) format = 'mc';
        else if (lowerLayout.count >= 4 && markedLetters.length) format = 'tf';
        else format = 'essay';
      } else {
        format = wpInferFormat(normalizedContentLines, block && block.formatHint, {
          answerText,
          answerHintLetters,
        });
      }
      /* Khôi phục cơ chế của index.htmlluu1 cho câu Tự luận/Trả lời ngắn:
         "Lời giải", "Hướng dẫn giải"... chính là phần đáp án của câu tự luận,
         không tách riêng khiến câu bị coi là chưa có đáp án. Chỉ MC/Đúng-Sai
         mới dùng Lời giải như lớp nội dung thứ hai sau khi đã hiện đáp án. */
      const guideText = normalizedGuideLines.join('\n').replace(/\n{3,}/g, '\n\n').trim();
      const constructedResponse = format === 'essay' || format === 'short';
      let finalAnswerText = isNdtc && format === 'essay' ? explicitAnswerText : answerText;
      if (constructedResponse && guideText) {
        finalAnswerText = [explicitAnswerText, guideText].filter(Boolean).join('\n').replace(/\n{3,}/g, '\n\n').trim();
      }
      const separateGuideText = (format === 'mc' || format === 'tf') ? guideText : '';
      const sourceOptionLayout = format === 'mc' ? wpChoiceLayoutFromLines(normalizedContentLines, 'ABCD') : { columns: 0 };
      const sourceStatementLayout = format === 'tf' ? wpChoiceLayoutFromLines(normalizedContentLines, 'abcd') : { columns: 0 };
      return {
        number,
        label,
        sectionRoman: String(block && block.sectionRoman || '').trim().toUpperCase(),
        sectionHeading: String(block && block.sectionHeading || '').trim(),
        format,
        contentLines: normalizedContentLines,
        displayText,
        text: `Câu. ${displayText}`,
        answerLines: normalizedAnswerLines,
        guideLines: (format === 'mc' || format === 'tf') ? normalizedGuideLines : [],
        guide: separateGuideText,
        solution: separateGuideText,
        explanation: separateGuideText,
        answerHintLetters,
        answerText: finalAnswerText,
        answerLabel: isNdtc
          ? 'Đáp án'
          : String(block && block.answerLabel || answerLabel || ((format === 'short' || format === 'essay') ? 'Trả lời' : 'Đáp án')).trim(),
        isNdtc,
        ndtcNumber: String(block && block.ndtcNumber || '').trim(),
        ndtcTitle,
        ndtcTitleText,
        optionLayoutColumns: Number(sourceOptionLayout && sourceOptionLayout.columns) || 0,
        statementLayoutColumns: Number(sourceStatementLayout && sourceStatementLayout.columns) || 0,
        hasRawAnswer: wpMeaningfulAnswerText(finalAnswerText),
        httcCode: String(block && block.httcCode || '').trim(),
      };
    }

    function wpManualParseItems(lines, preferredLetters, options = {}) {
      const list = Array.isArray(lines) ? lines : [];
      const expected = String(preferredLetters || '').split('');
      const allowLetterGaps = !!options.allowLetterGaps;
      const numericItems = String(preferredLetters || '') === '1234';
      let nextLetterIndex = 0;
      const items = [];
      const prompt = [];
      let current = null;
      let started = false;

      const pushInline = (line) => {
        /* Không chuyển biểu thức số học có dấu chấm thành các ý 1/2/3/4. */
        if (numericItems || typeof cv7991ParseInlineChoices !== 'function') return false;
        try {
          const parsed = cv7991ParseInlineChoices(line, preferredLetters, { minItems: 2, allowLetterGaps });
          if (!Array.isArray(parsed) || parsed.length < 2) return false;
          let nextIndex = nextLetterIndex;
          for (const item of parsed) {
            const letterIndex = expected.indexOf(String(item && item.letter || ''));
            if (letterIndex !== nextIndex && !(allowLetterGaps && nextIndex > 0 && letterIndex > nextIndex)) return false;
            nextIndex = letterIndex + 1;
          }
          parsed.forEach((item) => items.push({ letter: String(item.letter || ''), text: String(item.text || '').trim() }));
          nextLetterIndex = nextIndex;
          current = items[items.length - 1] || null;
          started = true;
          return true;
        } catch (_) {
          return false;
        }
      };

      list.forEach((line) => {
        const value = String(line || '').trim();
        if (!value) return;
        if (pushInline(value)) return;
        const match = numericItems
          ? value.match(/^\s*([1-4])\s*(?:[)\]:：]|\.(?!\d))\s*(.*)$/)
          : value.match(/^\s*([A-Za-z])\s*[\.\)\]:：]\s*(.*)$/);
        const letterIndex = match ? expected.indexOf(String(match[1])) : -1;
        if (match && (letterIndex === nextLetterIndex
          || (allowLetterGaps && nextLetterIndex > 0 && letterIndex > nextLetterIndex))) {
          current = { letter: String(match[1]), text: String(match[2] || '').trim() };
          items.push(current);
          nextLetterIndex = letterIndex + 1;
          started = true;
          return;
        }
        if (current) current.text = `${current.text}${current.text ? '\n' : ''}${value}`.trim();
        else prompt.push(value);
      });
      return { prompt: prompt.join('\n').trim(), items };
    }

    function wpFinalizeQuestion(prepared, displayIndex) {
      const format = prepared.format;
      let prompt = prepared.displayText;
      let options = [];
      let statements = [];
      let essayParts = [];
      let optionLayoutColumns = Number(prepared.optionLayoutColumns) || 0;
      let statementLayoutColumns = Number(prepared.statementLayoutColumns) || 0;

      if ((format === 'mc' || format === 'tf') && typeof cv7991ParseQuestionForPrint === 'function') {
        try {
          const parsed = cv7991ParseQuestionForPrint({ format, text: prepared.text }, displayIndex + 1) || {};
          prompt = String(parsed.prompt || '').trim() || prompt;
          if (format === 'mc') {
            options = Array.isArray(parsed.options)
              ? parsed.options.map((item) => ({ letter: String(item.letter || ''), text: String(item.text || '').trim() })).filter((item) => item.letter)
              : [];
            optionLayoutColumns = Number(parsed.optionLayoutColumns) || optionLayoutColumns;
          }
          if (format === 'tf') {
            statements = Array.isArray(parsed.statements)
              ? parsed.statements.map((item) => ({ letter: String(item.letter || ''), text: String(item.text || '').trim() })).filter((item) => item.letter)
              : [];
            statementLayoutColumns = Number(parsed.statementLayoutColumns) || statementLayoutColumns;
          }
        } catch (_) {}
      }

      if (format === 'mc' && options.length < 2) {
        let manual = wpManualParseItems(prepared.contentLines, 'ABCD');
        if (manual.items.length < 2) manual = wpManualParseItems(prepared.contentLines, 'abcd');
        if (manual.items.length >= 2) {
          options = manual.items;
          /* Nếu khối bắt đầu ngay bằng A/B/C/D thì manual.prompt rỗng là
             đúng chủ ý: không lấy phương án đầu làm đề bài rồi lặp lại ở dưới. */
          prompt = manual.prompt;
          optionLayoutColumns = optionLayoutColumns || (options.length >= 4 ? 1 : 0);
        } else {
          options = [];
          prompt = prepared.displayText;
        }
      }

      if (format === 'tf' && statements.length < 2) {
        let manual = wpManualParseItems(prepared.contentLines, 'abcd');
        if (manual.items.length < 2) manual = wpManualParseItems(prepared.contentLines, 'ABCD');
        if (manual.items.length >= 2) {
          statements = manual.items;
          /* Nếu khối bắt đầu ngay bằng a/b/c/d thì không tạo thêm một đề bài
             từ chính các ý đó. */
          prompt = manual.prompt;
          statementLayoutColumns = statementLayoutColumns || (statements.length >= 4 ? 1 : 0);
        } else {
          statements = [];
          prompt = prepared.displayText;
        }
      }

      /* Bộ phân tích in có thể đã tách được phương án/ý nhưng trả prompt rỗng.
         Trước đây mã dùng prepared.displayText làm dự phòng, vô tình chép toàn bộ
         A/B/C/D hoặc a/b/c/d lên phần đề bài. Chuẩn hóa lại từ chính các dòng nguồn:
         có đề dẫn thì giữ, không có đề dẫn thì prompt phải thật sự rỗng. */
      if (format === 'mc' && options.length >= 2) {
        let sourceItems = wpManualParseItems(prepared.contentLines, 'ABCD');
        if (sourceItems.items.length < 2) sourceItems = wpManualParseItems(prepared.contentLines, 'abcd');
        if (sourceItems.items.length >= 2) prompt = sourceItems.prompt;
      }
      if (format === 'tf' && statements.length >= 2) {
        let sourceItems = wpManualParseItems(prepared.contentLines, 'abcd');
        if (sourceItems.items.length < 2) sourceItems = wpManualParseItems(prepared.contentLines, 'ABCD');
        if (sourceItems.items.length >= 2) prompt = sourceItems.prompt;
      }

      if (format === 'essay' || format === 'short') {
        /* Tách phần đề bài khỏi các yêu cầu a), b), c), d) rồi dựng từng yêu cầu
           thành một hàng riêng. Áp dụng cả cho câu Tự luận và câu Trả lời ngắn:
           tiêu đề phần “TRẮC NGHIỆM TRẢ LỜI NGẮN” chỉ xác định loại câu, không
           làm mất cấu trúc các ý a/b/c/d của chính câu hỏi. */
        let manual = wpManualParseItems(prepared.contentLines, 'abcdefghijklmnopqrstuvwxyz', { allowLetterGaps: true });
        if (prepared.isNdtc && manual.items.length < 2) manual = wpManualParseItems(prepared.contentLines, '1234');
        if (manual.items.length >= 2) {
          essayParts = manual.items.map((item) => ({
            letter: String(item && item.letter || '').toLowerCase(),
            text: String(item && item.text || '').trim(),
          })).filter((item) => item.letter && item.text);
          /* manual.prompt chỉ chứa phần đề dẫn đứng trước a). Nếu không có
             đề dẫn thì để trống, nhờ đó a/b/c/d chỉ xuất hiện trong các hàng ý. */
          prompt = manual.prompt;
        } else {
          prompt = prepared.displayText;
        }
      }
      return wpAttachAnswerMetadata(Object.assign({}, prepared, {
        prompt,
        options,
        statements,
        essayParts,
        optionLayoutColumns,
        statementLayoutColumns,
        displayIndex,
      }));
    }

    function wpUniqueLetters(list) {
      const seen = new Set();
      const output = [];
      (Array.isArray(list) ? list : []).forEach((value) => {
        const normalized = String(value || '').trim();
        if (!normalized) return;
        const key = normalized.toLowerCase();
        if (seen.has(key)) return;
        seen.add(key);
        output.push(normalized);
      });
      return output;
    }

    function wpParseMcCorrectLetters(answerText) {
      const matches = [];
      String(answerText || '').replace(/\b([A-D])\b/gi, (_, letter) => {
        matches.push(String(letter || '').toUpperCase());
        return _;
      });
      return wpUniqueLetters(matches);
    }

    function wpParseTfAnswerInfo(answerText, question) {
      const raw = String(answerText || '');
      const letters = Array.isArray(question && question.statements)
        ? question.statements.map((item) => String(item && item.letter || '').trim()).filter(Boolean)
        : [];
      const correct = [];
      let recognized = false;
      let match;

      // Chuỗi chỉ gồm B, D... là danh sách các ý đúng được suy ra từ chữ cái
      // bôi đỏ/gạch chân. Ưu tiên nhận dạng dạng này trước để chữ D không bị
      // hiểu nhầm là trạng thái “Đúng” của chữ đứng trước.
      const bareHintLetters = [];
      String(raw || '').replace(/\b([A-D])\b/gi, (_, letter) => {
        bareHintLetters.push(String(letter || '').toUpperCase());
        return _;
      });
      if (letters.length && bareHintLetters.length && /^[\sA-D,;|\/\-–—]+$/i.test(raw)) {
        recognized = true;
        const wanted = new Set(bareHintLetters.map((letter) => letter.toLowerCase()));
        letters.forEach((letter) => {
          if (wanted.has(String(letter || '').toLowerCase())) correct.push(letter);
        });
        return { recognized, correctLetters: wpUniqueLetters(correct) };
      }

      const structuredPairs = wpStructuredTfPairs(raw);
      if (structuredPairs.length) {
        recognized = true;
        structuredPairs.forEach((pair) => {
          const state = wpPlainLower(pair && pair.state || '');
          if (/^(?:dung|d|true)$/.test(state)) correct.push(String(pair && pair.letter || ''));
        });
      }

      if (!recognized && letters.length) {
        const statuses = wpStructuredTfStatuses(raw);
        if (statuses.length >= letters.length) {
          recognized = true;
          letters.forEach((letter, index) => {
            const state = wpPlainLower(statuses[index] || '');
            if (/^(?:dung|d|true)$/.test(state)) correct.push(letter);
          });
        }
      }

      if (!recognized && letters.length) {
        const bareLetters = [];
        String(raw || '').replace(/\b([A-D])\b/gi, (_, letter) => {
          bareLetters.push(String(letter || '').toUpperCase());
          return _;
        });
        if (bareLetters.length && /^[\sA-D,;|\/\-–—]+$/i.test(raw)) {
          recognized = true;
          const wanted = new Set(bareLetters.map((letter) => letter.toLowerCase()));
          letters.forEach((letter) => {
            if (wanted.has(String(letter || '').toLowerCase())) correct.push(letter);
          });
        }
      }

      return { recognized, correctLetters: wpUniqueLetters(correct) };
    }

    function wpSequentialSubpartLetters(lines) {
      const list = Array.isArray(lines) ? lines : String(lines || '').replace(/\r/g, '').split('\n');
      // Dùng đúng các nhãn đã tách ở đề bài, không bắt buộc có f sau e hoặc j sau i.
      const normalized = list.map((line) => String(line || '').replace(/(^|\t+| {2,})([A-Z])(?=\s*[\)\].:：])/g,
        (_, spacing, letter) => spacing + letter.toLowerCase()));
      const letters = wpManualParseItems(normalized, 'abcdefghijklmnopqrstuvwxyz', { allowLetterGaps: true })
        .items.map((item) => item.letter);
      if (letters.length >= 2) return letters;
      return wpManualParseItems(list, '1234').items.map((item) => item.letter);
    }

    function wpIsSharedEssayAnswerMediaLine(line) {
      const value = String(line || '').trim();
      if (!value) return false;
      /* Hình raster, DrawingML/SVG sau khi đọc DOCX đều được quy về IMG;
         bảng dùng làm hình minh họa được giữ dưới dạng TBL. Chỉ nhân bản các
         khối phương tiện chung, không nhân bản phần lời dẫn thông thường. */
      return /\[\[CV7991_(?:IMG|TBL):[^\]]+\]\]/i.test(value)
        || /\[\[\s*HINH\s*:[^\]]+\]\]/i.test(value);
    }

    function wpSharedMultipartEssayMediaLines(question, answerPreamble = []) {
      const output = [];
      const seen = new Set();
      const collect = (lines) => {
        (Array.isArray(lines) ? lines : []).forEach((line) => {
          const value = String(line || '').trim();
          if (!wpIsSharedEssayAnswerMediaLine(value) || seen.has(value)) return;
          seen.add(value);
          output.push(value);
        });
      };

      /* Nếu hình chung được đặt trong đề bài, chỉ lấy phần trước ý a), tránh
         nhân nhầm hình riêng của một ý vào các ý còn lại. */
      const contentLines = Array.isArray(question && question.contentLines) ? question.contentLines : [];
      const firstPart = String(question && question.essayParts && question.essayParts[0] && question.essayParts[0].letter || 'a');
      const firstSubpartIndex = contentLines.findIndex((line) => new RegExp(`^\\s*${firstPart}\\s*[\\)\\].:：]\\s*`, 'i').test(String(line || '')));
      collect(firstSubpartIndex >= 0 ? contentLines.slice(0, firstSubpartIndex) : []);
      collect(answerPreamble);
      return output;
    }

    function wpParseMultipartEssayAnswer(answerText, question) {
      const promptLetters = wpSequentialSubpartLetters(question && question.contentLines || []);
      if (promptLetters.length < 2) return [];

      const lines = String(answerText || '').replace(/\r/g, '').split('\n');
      const parts = [];
      const preamble = [];
      let current = null;
      let nextIndex = 0;

      const pushCurrent = () => {
        if (!current) return;
        const normalized = wpNormalizeCollectedLines(current.lines);
        const text = normalized.join('\n').replace(/\n{3,}/g, '\n\n').trim();
        parts.push({ letter: current.letter, text });
        current = null;
      };

      lines.forEach((rawLine) => {
        const line = String(rawLine == null ? '' : rawLine).trim();
        const match = line.match(/^\s*([a-z1-4])\s*(?:[)\]:：]|\.(?!\d))\s*(.*)$/i);
        const letter = match ? String(match[1] || '').toLowerCase() : '';
        if (match && nextIndex < promptLetters.length && letter === promptLetters[nextIndex]) {
          pushCurrent();
          current = { letter, lines: [] };
          const sharedMediaLines = wpSharedMultipartEssayMediaLines(question, preamble);
          if (nextIndex === 0) {
            /* Ý đầu giữ nguyên phần mở đầu của đáp án. Nếu hình chung chỉ nằm
               trong đề bài thì chèn thêm vào trước, không lặp lại hình đã có. */
            const preambleSet = new Set(preamble.map((item) => String(item || '').trim()));
            current.lines.push(...sharedMediaLines.filter((item) => !preambleSet.has(item)));
            if (preamble.length) current.lines.push(...preamble);
          } else if (sharedMediaLines.length) {
            // Mỗi ý sau đều nhận cùng tập hình/bảng minh họa chung.
            current.lines.push(...sharedMediaLines);
          }
          const body = String(match[2] || '').trim();
          if (body) current.lines.push(body);
          nextIndex += 1;
          return;
        }
        if (current) current.lines.push(line);
        else if (line) preamble.push(line);
      });
      pushCurrent();

      if (parts.length < 2) return [];
      return parts.filter((part, index) => part.letter === promptLetters[index]);
    }

    function wpQuestionDisplayNumber(question, fallback = '') {
      return String(question && (question.displayNumber || question.number) || fallback || '').trim();
    }

    function wpDisambiguateDuplicateQuestionNumbers(questions) {
      const list = Array.isArray(questions) ? questions : [];
      const totals = new Map();
      list.forEach((question, index) => {
        const key = String(question && question.number || index + 1).trim() || String(index + 1);
        totals.set(key, (totals.get(key) || 0) + 1);
      });
      const seen = new Map();
      return list.map((question, index) => {
        const sourceNumber = String(question && question.number || index + 1).trim() || String(index + 1);
        const total = totals.get(sourceNumber) || 1;
        const occurrence = (seen.get(sourceNumber) || 0) + 1;
        seen.set(sourceNumber, occurrence);
        /* displayNumber vẫn giữ dạng số (1.1, 1.2...) để ô nhảy câu và dữ liệu
           quét cũ tiếp tục hoạt động. Chỉ tiêu đề trực quan ưu tiên tên phần. */
        const displayNumber = total > 1 ? `${sourceNumber}.${occurrence}` : sourceNumber;
        const sectionRoman = wpRomanQuestionSection(question && question.sectionRoman || '');
        const isNdtc = !!(question && question.isNdtc);
        const ndtcNumber = String(question && question.ndtcNumber || sourceNumber).trim() || sourceNumber;
        const ndtcTitleText = String(question && question.ndtcTitleText || '').trim();
        const sourceLabelRaw = String(question && question.label || `Câu ${sourceNumber}.`).trim();
        const sourceLabel = isNdtc
          ? ndtcTitleText
          : (/^(?:Câu|Cau)\b/i.test(sourceLabelRaw)
            ? sourceLabelRaw.replace(/^Cau\b/i, 'Câu')
            : `Câu ${sourceNumber}.`);
        let label = sourceLabel;
        if (!isNdtc && sectionRoman) {
          /* Ví dụ: “I. Câu 1.”, “II. Câu 1.”. Giữ nguyên phần mô tả nằm
             trong nhãn gốc như “(NB)” nếu tài liệu có dùng. */
          label = `${sectionRoman}. ${sourceLabel}`;
        } else if (!isNdtc && total > 1) {
          label = sourceLabel.replace(/((?:Câu|Cau)\s*(?:số\s*)?)\d{1,4}/i, `$1${displayNumber}`);
        }
        return Object.assign({}, question, {
          sourceNumber,
          displayNumber,
          sectionRoman,
          sectionQuestionKey: sectionRoman ? `${sectionRoman}.${sourceNumber}` : '',
          label,
        });
      });
    }

    function wpAttachAnswerMetadata(question) {
      const rawAnswerText = String(question && question.answerText || '').trim();
      const answerLabel = String(question && question.answerLabel || ((question && (question.format === 'short' || question.format === 'essay')) ? 'Trả lời' : 'Đáp án')).trim() || 'Đáp án';
      const hasAnswerText = wpMeaningfulAnswerText(rawAnswerText);
      let correctLetters = [];
      let parsedAnswer = false;
      const markedLetters = wpUniqueLetters(Array.isArray(question && question.answerHintLetters) ? question.answerHintLetters : [])
        .map((value) => String(value || '').trim().toUpperCase())
        .filter((value) => /^[A-D]$/.test(value));
      if (question && question.format === 'mc') {
        /* Trong NDTC, chính tín hiệu bôi màu/gạch chân ở phương án là nguồn
           đáp án chuẩn; phần Giải NDTC vẫn được giữ làm lời giải nhưng không
           bị quét chữ A/B/C/D trong lời văn để tránh nhận nhầm. */
        const explicitLetters = hasAnswerText && !(question.isNdtc && markedLetters.length)
          ? wpParseMcCorrectLetters(rawAnswerText)
          : [];
        correctLetters = wpUniqueLetters(explicitLetters.concat(markedLetters))
          .map((value) => String(value || '').trim().toUpperCase())
          .filter((value) => /^[A-D]$/.test(value));
        parsedAnswer = correctLetters.length > 0;
      } else if (question && question.format === 'tf') {
        if (question.isNdtc && markedLetters.length) {
          const wanted = new Set(markedLetters.map((value) => value.toLowerCase()));
          correctLetters = (Array.isArray(question.statements) ? question.statements : [])
            .map((item) => String(item && item.letter || '').trim())
            .filter((letter) => wanted.has(letter.toLowerCase()));
          parsedAnswer = true;
        } else if (hasAnswerText) {
          const parsed = wpParseTfAnswerInfo(rawAnswerText, question);
          correctLetters = parsed.correctLetters;
          parsedAnswer = !!parsed.recognized;
        }
      }
      const essayAnswerParts = question && question.format === 'essay' && hasAnswerText
        ? wpParseMultipartEssayAnswer(rawAnswerText, question)
        : [];
      const invalidMultipleChoiceAnswer = !!(question && question.format === 'mc' && correctLetters.length > 1);
      return Object.assign({}, question, {
        answerText: rawAnswerText,
        answerLabel,
        hasDisplayableAnswer: hasAnswerText || correctLetters.length > 0,
        hasParsedAnswer: (question && (question.format === 'short' || question.format === 'essay')) ? hasAnswerText : parsedAnswer,
        correctLetters,
        invalidMultipleChoiceAnswer,
        essayAnswerParts,
      });
    }

    function wpTypeName(format) {
      if (format === 'tf') return 'Đúng – Sai';
      if (format === 'short') return 'Trả lời ngắn';
      if (format === 'essay') return 'Tự luận';
      return 'Nhiều lựa chọn';
    }

    function wpQuestionDensity(question) {
      const rawLength = String(question && question.displayText || '').replace(/\[\[CV7991_[^\]]+\]\]/g, ' ').length;
      const itemCount = (question && question.options || []).length
        + (question && question.statements || []).length
        + (question && question.essayParts || []).length;
      if (rawLength > 1750 || itemCount > 8) return 'is-very-dense';
      if (rawLength > 950 || itemCount > 5) return 'is-dense';
      return '';
    }

    function wpQuestionImageTokens(question) {
      const essayPartText = Array.isArray(question && question.essayParts)
        ? question.essayParts.map((item) => String(item && item.text || '')).join(' ')
        : '';
      const source = [question && question.prompt, question && question.displayText, essayPartText]
        .map((value) => String(value || '')).join(' ');
      const ids = [];
      source.replace(/\[\[CV7991_IMG:([^\]]+)\]\]/g, (_, id) => {
        ids.push(String(id || '').trim());
        return _;
      });
      return ids;
    }

    function wpQuestionHasStandaloneFigure(question) {
      const ids = wpQuestionImageTokens(question);
      if (!ids.length) return /\[\[\s*HINH\s*:/i.test(String(question && question.prompt || ''));
      const imageMap = wpState && wpState.context && wpState.context.imageMap || {};
      return ids.some((id) => {
        const image = imageMap[id];
        if (!image) return true;
        if (image.wordGroupData) return false;
        if (typeof cv7991PresenterImageIsFormula === 'function') {
          try { if (cv7991PresenterImageIsFormula(image)) return false; } catch (_) {}
        }
        return true;
      });
    }

    function wpUseMcGrid(question) {
      const options = Array.isArray(question && question.options) ? question.options : [];
      if (options.length < 4 || wpQuestionHasStandaloneFigure(question)) return false;
      const combined = options.map((item) => String(item && item.text || '')).join(' ');
      const maxLength = options.reduce((max, item) => Math.max(max, String(item && item.text || '').replace(/\[\[CV7991_[^\]]+\]\]/g, '').length), 0);
      const hasRichBlock = /\[\[CV7991_(?:IMG|TBL):/i.test(combined);
      return !hasRichBlock && maxLength <= 105 && combined.length <= 360;
    }

    function wpMcLayoutClass(question) {
      // Trình chiếu Word cũng luôn bố trí A/B/C/D thành 01 cột.
      return 'is-stacked';
    }

    function wpChoiceCheckHtml(letterValue, selected = false) {
      const letter = String(letterValue || '').trim();
      const active = !!selected;
      return `<button type="button" class="cv7991-choice-check-btn${active ? ' is-checked' : ''}" aria-pressed="${active ? 'true' : 'false'}" aria-label="${active ? 'Bỏ tích chọn' : 'Tích chọn'} ${wpEscape(letter)}" title="${active ? 'Bỏ tích chọn' : 'Tích chọn'}"><span aria-hidden="true">✓</span></button>`;
    }

    function wpTfChoiceHtml(letterValue, markValue = '', locked = false) {
      const letter = String(letterValue || '').trim();
      const safeLetter = wpEscape(letter);
      const mark = String(markValue || '').trim().toUpperCase();
      return `<span class="cv7991-tf-choice-group" role="group" aria-label="Chọn Đúng hoặc Sai cho ý ${safeLetter}">
        <button type="button" class="cv7991-tf-choice-btn is-true${mark === 'Đ' ? ' is-checked' : ''}" data-tf-choice="Đ" aria-pressed="${mark === 'Đ' ? 'true' : 'false'}" aria-label="Chọn Đúng cho ý ${safeLetter}" title="Đúng"${locked ? ' disabled' : ''}>Đ</button>
        <button type="button" class="cv7991-tf-choice-btn is-false${mark === 'S' ? ' is-checked' : ''}" data-tf-choice="S" aria-pressed="${mark === 'S' ? 'true' : 'false'}" aria-label="Chọn Sai cho ý ${safeLetter}" title="Sai"${locked ? ' disabled' : ''}>S</button>
      </span>`;
    }

    function wpSyncChoiceCheck(row, active) {
      if (!(row instanceof Element)) return;
      const button = row.querySelector('.cv7991-choice-check-btn');
      if (!(button instanceof HTMLElement)) return;
      const selected = !!active;
      button.classList.toggle('is-checked', selected);
      button.setAttribute('aria-pressed', selected ? 'true' : 'false');
      const letter = String(row.getAttribute('data-letter') || '').trim();
      button.setAttribute('aria-label', `${selected ? 'Bỏ tích chọn' : 'Tích chọn'} ${letter}`.trim());
      button.title = selected ? 'Bỏ tích chọn' : 'Tích chọn';
    }

    function wpTfScanResultMark(question, letterValue) {
      const letter = String(letterValue || '').trim().toLowerCase();
      const value = (question && question.scanResultMarks && question.scanResultMarks[letter])
        || (question && question.scanSavedMarks && question.scanSavedMarks[letter]) || '';
      const mark = String(value).trim().toUpperCase();
      return ['Đ', 'S'].includes(mark) ? mark : '';
    }

    function wpSetTfScanResult(question, letterValue, markValue) {
      const letter = String(letterValue || '').trim().toLowerCase();
      const mark = String(markValue || '').trim().toUpperCase();
      if (!question || question.format !== 'tf' || !letter || !['Đ', 'S'].includes(mark)) return;
      if (!question.scanResultMarks || typeof question.scanResultMarks !== 'object') question.scanResultMarks = {};
      question.scanResultMarks[letter] = mark;
    }

    function wpSyncTfChoice(row, markValue = '', locked = false) {
      if (!(row instanceof Element)) return;
      const mark = String(markValue || '').trim().toUpperCase();
      row.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]').forEach((button) => {
        const value = String(button.getAttribute('data-tf-choice') || '').trim().toUpperCase();
        const active = value === mark;
        button.classList.toggle('is-checked', active);
        button.setAttribute('aria-pressed', active ? 'true' : 'false');
        button.disabled = !!locked;
        if (locked) button.classList.remove('cv7991-tf-choice-wrong');
      });
      row.setAttribute('aria-pressed', mark ? 'true' : 'false');
    }

    function wpManualSelectionSet(question) {
      const raw = question && question.manualSelectedLetters;
      const values = Array.isArray(raw) ? raw : (raw ? [raw] : []);
      return new Set(values
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
    }

    function wpManualTfMarkMap(question) {
      const source = question && question.manualTfMarks && typeof question.manualTfMarks === 'object'
        ? question.manualTfMarks
        : {};
      const output = {};
      Object.entries(source).forEach(([letter, value]) => {
        const key = String(letter || '').trim().toLowerCase();
        const mark = String(value || '').trim().toUpperCase();
        if (key && ['Đ', 'S'].includes(mark)) output[key] = mark;
      });
      return output;
    }

    function wpQuestionHasManualAnswer(question) {
      const wanted = new Set((Array.isArray(question && question.correctLetters) ? question.correctLetters : [])
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
      return !!(question && question.hasParsedAnswer) || wanted.size > 0;
    }

    function wpManualChoiceClass(question, key) {
      const wanted = new Set((Array.isArray(question && question.correctLetters) ? question.correctLetters : [])
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
      if (!wpQuestionHasManualAnswer(question)) return 'is-manual-pending';
      return wanted.has(String(key || '').trim().toLowerCase())
        ? 'is-manual-correct'
        : 'is-manual-wrong';
    }

    function wpExpectedManualTfMark(question, key) {
      if (!wpQuestionHasManualAnswer(question)) return '';
      const wanted = new Set((Array.isArray(question && question.correctLetters) ? question.correctLetters : [])
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
      return wanted.has(String(key || '').trim().toLowerCase()) ? 'Đ' : 'S';
    }

    function wpQuestionAndRootForManualSelection(row) {
      if (!(row instanceof Element)) return { question: null, root: null };
      let questionIndex = wpState.index;
      let root = row.closest('.word-presentation-items');
      if (wpState.viewMode === 'all') {
        const section = row.closest('.word-presentation-all-question[data-question-index]');
        const parsed = parseInt(String(section && section.getAttribute('data-question-index') || ''), 10);
        if (!Number.isFinite(parsed) || parsed < 0) return { question: null, root: null };
        questionIndex = parsed;
        root = section.querySelector('.word-presentation-items');
      }
      return {
        question: Array.isArray(wpState.questions) ? wpState.questions[questionIndex] : null,
        root,
      };
    }

    function wpApplyManualSelectionClasses(question, root) {
      if (!question || !(root instanceof Element)) return;
      const selected = wpManualSelectionSet(question);
      const tfMarks = wpManualTfMarkMap(question);
      root.querySelectorAll(':scope > .word-presentation-item[data-letter]').forEach((row) => {
        const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
        const active = question.format === 'mc' && !!key && selected.has(key);
        const scanMark = question.format === 'tf' ? wpTfScanResultMark(question, key) : '';
        const tfMark = scanMark || (question.format === 'tf' ? String(tfMarks[key] || '') : '');
        row.classList.remove('is-manual-selected', 'is-manual-correct', 'is-manual-wrong', 'is-manual-pending', 'has-manual-mark');
        row.querySelectorAll('.word-presentation-tf-manual-mark').forEach((badge) => badge.remove());
        if (active) row.classList.add('is-manual-selected');
        row.setAttribute('aria-pressed', active || !!tfMark ? 'true' : 'false');
        if (question.format === 'tf') wpSyncTfChoice(row, tfMark, !!scanMark);
        else wpSyncChoiceCheck(row, active);
      });
    }

    function wpSetManualTfChoiceRow(row, markValue = '', event = null) {
      if (!(row instanceof Element)) return false;
      const group = row.closest('.word-presentation-items');
      if (!(group instanceof Element) || group.classList.contains('is-essay-parts')) return false;
      const pair = wpQuestionAndRootForManualSelection(row);
      const question = pair.question;
      if (!question || question.format !== 'tf') return false;
      const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
      const requested = String(markValue || '').trim().toUpperCase();
      if (!key || !['Đ', 'S'].includes(requested)) return false;
      if (wpTfScanResultMark(question, key)) {
        if (event) {
          event.preventDefault();
          event.stopPropagation();
        }
        return true;
      }
      const marks = wpManualTfMarkMap(question);
      if (marks[key] === requested) delete marks[key];
      else marks[key] = requested;
      question.manualTfMarks = marks;
      question.manualSelectedLetters = [];
      wpApplyManualSelectionClasses(question, pair.root || group);
      if (wpState.answerVisible && wpState.viewMode === 'single') wpHighlightCorrectItems(question);
      wpRequestFit(true);
      if (event) {
        event.preventDefault();
        event.stopPropagation();
      }
      return true;
    }

    function wpToggleManualSelectionRow(row, event = null, forceOn = false) {
      if (!(row instanceof Element)) return false;
      const group = row.closest('.word-presentation-items');
      if (!(group instanceof Element) || group.classList.contains('is-essay-parts')) return false;
      const pair = wpQuestionAndRootForManualSelection(row);
      const question = pair.question;
      if (!question || !['mc', 'tf'].includes(String(question.format || ''))) return false;
      const key = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
      if (!key) return false;

      if (question.format === 'tf') return false;
      let selected = wpManualSelectionSet(question);
      selected = (!forceOn && selected.size === 1 && selected.has(key))
        ? new Set()
        : new Set([key]);
      question.manualSelectedLetters = Array.from(selected);
      wpApplyManualSelectionClasses(question, pair.root || group);
      wpRequestFit(true);
      if (event) {
        event.preventDefault();
        event.stopPropagation();
      }
      return true;
    }

    function wpItemsHtml(items, className, question = null) {
      const isTf = !!(question && question.format === 'tf');
      const canCheck = !!(question && ['mc', 'tf'].includes(String(question.format || '')));
      const manualSelected = wpManualSelectionSet(question);
      const manualTfMarks = wpManualTfMarkMap(question);
      /* Danh sách các ý a/b/c/d có thể thuộc Tự luận hoặc Trả lời ngắn.
         Dựa vào lớp bố cục thay vì chỉ dựa vào format để luôn dùng dấu “)”
         và kiểu nhãn màu xanh như nhau. */
      const isResponseParts = String(className || '').split(/\s+/).includes('is-essay-parts');
      const savedMarks = (question && question.scanSavedMarks && typeof question.scanSavedMarks === 'object')
        ? question.scanSavedMarks
        : {};
      const closedItems = (question && question.scanClosedItems && typeof question.scanClosedItems === 'object')
        ? question.scanClosedItems
        : {};
      return `<div class="word-presentation-items ${className}">${items.map((item) => {
        const letter = String(item && item.letter || '').trim();
        const letterKey = letter.toLowerCase();
        const savedMark = isTf ? String(savedMarks[letterKey] || '') : '';
        const finished = isTf && (!!savedMark || !!closedItems[letterKey]);
        const active = isTf && !finished && wpState.activeTfLetter === letterKey && wpState.viewMode === 'single';
        const scanButton = isTf && !finished
          ? `<button class="word-presentation-tf-scan-btn" data-word-tf-scan="${wpEscape(letterKey)}" type="button">Quét</button>`
          : '';
        const manuallySelected = !isTf && canCheck && manualSelected.has(letterKey);
        const scanMark = isTf ? wpTfScanResultMark(question, letterKey) : '';
        const manualTfMark = scanMark || (isTf ? String(manualTfMarks[letterKey] || '') : '');
        const manualSelectionClass = manuallySelected ? ' is-manual-selected' : '';
        const rowClass = `${canCheck ? ' cv7991-has-choice-check' : ''}${isTf && !finished ? ' has-scan-control' : ''}${finished ? ' is-scan-finished' : ''}${active ? ' is-scan-target' : ''}${manualSelectionClass}`;
        const labelSuffix = isResponseParts ? ')' : '.';
        const checkHtml = isTf
          ? wpTfChoiceHtml(letter, manualTfMark, !!scanMark)
          : (canCheck ? wpChoiceCheckHtml(letter, manuallySelected) : '');
        return `<div class="word-presentation-item${rowClass}" data-letter="${wpEscape(letter)}" aria-pressed="${manuallySelected || !!manualTfMark ? 'true' : 'false'}">${scanButton}<span class="word-presentation-item-label">${wpEscape(letter)}${labelSuffix}</span><div class="word-presentation-item-content"><div class="word-presentation-item-flow">${wpRich(item && item.text || '')}</div></div>${checkHtml}</div>`;
      }).join('')}</div>`;
    }

    function wpQuestionBodyHtml(question) {
      if (question.format === 'mc' && question.options.length) {
        return wpItemsHtml(question.options, wpMcLayoutClass(question), question);
      }
      if (question.format === 'tf' && question.statements.length) {
        return wpItemsHtml(question.statements, 'is-stacked is-statements', question);
      }
      if ((question.format === 'essay' || question.format === 'short')
        && Array.isArray(question.essayParts) && question.essayParts.length) {
        return wpItemsHtml(question.essayParts, 'is-stacked is-essay-parts', question);
      }
      return '';
    }

    function wpQuestionInnerHtml(question) {
      const isNdtc = !!(question && question.isNdtc);
      const titleSource = isNdtc
        ? String(question && (question.ndtcTitle || question.ndtcTitleText) || '').trim()
        : String(question && question.label || '').trim();
      const titleHtml = isNdtc ? wpRich(titleSource) : wpEscape(titleSource);
      const hasStructuredItems = !!(
        (question && question.format === 'mc' && Array.isArray(question.options) && question.options.length)
        || (question && question.format === 'tf' && Array.isArray(question.statements) && question.statements.length)
        || (question && (question.format === 'essay' || question.format === 'short')
          && Array.isArray(question.essayParts) && question.essayParts.length)
      );
      const promptlessItemsClass = hasStructuredItems && !String(question && question.prompt || '').trim()
        ? ' is-promptless-items'
        : '';
      return `
        <div class="word-presentation-content-shell${isNdtc ? ' is-ndtc-content' : ''}">
          <div class="word-presentation-question-line${isNdtc ? ' is-ndtc-question-line' : ''}${promptlessItemsClass}">
            ${titleHtml ? `<span class="word-presentation-question-label${isNdtc ? ' word-presentation-ndtc-title' : ''}">${titleHtml}</span>` : ''}
            <div class="word-presentation-question-prompt">${cv7991SourcePromptHtml(question.prompt, wpState.context || {}) || wpRichParagraphs(question.prompt, { firstInline: !isNdtc })}</div>
          </div>
          ${wpQuestionBodyHtml(question)}
          <div class="word-presentation-media-panel" hidden></div>
        </div>`;
    }

    function wpSetViewMode(mode) {
      const showAll = mode === 'all';
      if (!showAll && wpState.viewMode === 'all') wpCancelAllViewProgressiveRender();
      wpState.viewMode = showAll ? 'all' : 'single';
      presenter.classList.toggle('is-all-view', showAll);
      allBtn.classList.toggle('is-active', showAll);
      allBtn.setAttribute('aria-pressed', showAll ? 'true' : 'false');
      allBtn.textContent = showAll ? 'Từng câu' : 'Tất cả';
      allBtn.title = showAll ? 'Quay lại trình chiếu từng câu' : 'Hiển thị toàn bộ câu hỏi theo thứ tự trong file Word';
    }

    function wpSyncJumpInput(question) {
      const value = wpQuestionDisplayNumber(question, wpState.index + 1).replace(',', '.');
      jumpInput.value = /^\d+(?:\.\d+)?$/.test(value) ? value : String(wpState.index + 1);
    }


    function wpQuestionPickerPlainText(value) {
      let textValue = String(value == null ? '' : value)
        .replace(/\[\[[^\]]+\]\]/g, ' ')
        .replace(/<[^>]*>/g, ' ')
        .replace(/&nbsp;|&#160;/gi, ' ')
        .replace(/[\r\n\t]+/g, ' ')
        .replace(/\s+/g, ' ')
        .trim();
      if (textValue.length > 220) textValue = textValue.slice(0, 217).trimEnd() + '…';
      return textValue;
    }

    function wpQuestionPickerLabel(question, index) {
      const rawLabel = String(question && question.label || '').trim().replace(/\s*[:：]\s*$/, '');
      if (rawLabel) return rawLabel;
      const rawNumber = wpQuestionDisplayNumber(question, index + 1);
      if (question && question.isNdtc) return `NDTC ${rawNumber}`;
      return /\bcâu\b/i.test(rawNumber) ? rawNumber : `Câu ${rawNumber}`;
    }

    function wpRenderQuestionPickerTable() {
      const isPowerPointSlides = wpOrdinaryState.kind === 'pptx-slide';
      const pickerTitle = document.getElementById('wordPresentationQuestionPickerTitle');
      if (pickerTitle instanceof HTMLElement) {
        pickerTitle.textContent = isPowerPointSlides ? 'Chọn Slide' : 'Chọn câu trình chiếu';
      }
      const total = isPowerPointSlides
        ? Math.max(0, Number(wpOrdinaryState.pageCount) || 0)
        : (Array.isArray(wpState.questions) ? wpState.questions.length : 0);
      const fragment = document.createDocumentFragment();
      questionPickerModal.classList.toggle('is-powerpoint-picker', isPowerPointSlides);
      if (isPowerPointSlides) {
        const size = wpOrdinaryState.pptxSlidePlans[0] && wpOrdinaryState.pptxSlidePlans[0].slideSize;
        const width = Math.max(1, Number(size && size.width) || 16);
        const height = Math.max(1, Number(size && size.height) || 9);
        questionPickerModal.style.setProperty('--pptx-slide-aspect', `${width} / ${height}`);
      } else {
        questionPickerModal.style.removeProperty('--pptx-slide-aspect');
      }
      if (!total) {
        const empty = document.createElement('div');
        empty.className = 'word-presentation-question-picker-empty';
        empty.textContent = isPowerPointSlides ? 'Chưa có slide để lựa chọn.' : 'Chưa có câu hỏi để lựa chọn.';
        fragment.appendChild(empty);
        questionPickerSummary.textContent = '';
        questionPickerBody.replaceChildren(fragment);
        return;
      }

      const entries = isPowerPointSlides
        ? Array.from({ length: total }, (_, index) => ({ index })).filter(({ index }) => !wpPowerPointSlideIsHidden(index))
        : wpState.questions.map((question, index) => ({ question, index }));
      const resumeIndex = isPowerPointSlides && wpOrdinaryState.pptxRememberedPageIndex >= 0
        ? wpPowerPointVisibleSlideIndex(wpOrdinaryState.pptxRememberedPageIndex + 1)
        : -1;
      entries.forEach(({ question, index }) => {
        const label = isPowerPointSlides ? `Slide ${index + 1}` : wpQuestionPickerLabel(question, index);
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'word-presentation-question-picker-item';
        button.dataset.wordQuestionPickerIndex = String(index);
        button.setAttribute('aria-label', `Trình chiếu ${label}`);
        if (isPowerPointSlides && index === resumeIndex) {
          button.classList.add('is-pptx-resume');
          button.dataset.pptxResume = 'true';
          button.setAttribute('aria-label', `Tiếp tục từ ${label}`);
        }
        if (isPowerPointSlides) {
          const thumbnailUrl = String(wpOrdinaryState.pptxThumbnails[index] || '');
          if (thumbnailUrl) {
            const image = document.createElement('img');
            image.className = 'word-presentation-slide-thumbnail';
            image.src = thumbnailUrl;
            image.alt = `Ảnh đại diện slide ${index + 1}`;
            button.appendChild(image);
          } else {
            const placeholder = document.createElement('span');
            placeholder.className = 'word-presentation-slide-thumbnail is-loading';
            placeholder.textContent = 'Đang tạo ảnh…';
            button.appendChild(placeholder);
          }
          const number = document.createElement('span');
          number.className = 'word-presentation-slide-number';
          number.textContent = index === resumeIndex ? `${label} · Tiếp tục` : label;
          button.appendChild(number);
        } else {
          button.textContent = label;
        }
        if (index === (isPowerPointSlides ? wpOrdinaryState.pageIndex : wpState.index)) {
          button.setAttribute('aria-current', 'true');
        }
        fragment.appendChild(button);
      });

      questionPickerSummary.textContent = '';
      questionPickerBody.replaceChildren(fragment);
    }

    function wpCloseQuestionPicker(restoreFocus = true) {
      if (questionPickerModal.hidden) return;
      questionPickerModal.hidden = true;
      questionPickerModal.setAttribute('aria-hidden', 'true');
      chooseQuestionBtn.setAttribute('aria-expanded', 'false');
      const returnFocus = wpState.questionPickerReturnFocus;
      wpState.questionPickerReturnFocus = null;
      if (restoreFocus && returnFocus instanceof HTMLElement && document.contains(returnFocus)) {
        try { returnFocus.focus({ preventScroll: true }); } catch (_) { try { returnFocus.focus(); } catch (_) {} }
      }
    }

    function wpOpenQuestionPicker() {
      const hasPowerPointSlides = wpOrdinaryState.kind === 'pptx-slide' && wpOrdinaryState.pageCount > 0;
      if (wpState.busy || (!hasPowerPointSlides && !wpState.questions.length) || chooseQuestionBtn.disabled) return false;
      wpCloseAnswerModal();
      wpCloseImageZoom();
      wpRenderQuestionPickerTable();
      wpState.questionPickerReturnFocus = document.activeElement instanceof HTMLElement
        ? document.activeElement
        : chooseQuestionBtn;
      questionPickerModal.hidden = false;
      questionPickerModal.setAttribute('aria-hidden', 'false');
      chooseQuestionBtn.setAttribute('aria-expanded', 'true');
      requestAnimationFrame(() => {
        const resume = questionPickerBody.querySelector('[data-pptx-resume="true"]');
        const current = questionPickerBody.querySelector('[aria-current="true"]');
        const first = questionPickerBody.querySelector('.word-presentation-question-picker-item');
        const target = resume instanceof HTMLElement ? resume
          : (current instanceof HTMLElement ? current : first);
        if (target instanceof HTMLElement) {
          try { target.focus({ preventScroll: false }); } catch (_) { try { target.focus(); } catch (_) {} }
        }
      });
      return true;
    }

    function wpSelectQuestionFromPicker(index) {
      const targetIndex = Number(index);
      if (wpOrdinaryState.kind === 'pptx-slide') {
        if (!Number.isInteger(targetIndex) || targetIndex < 0 || targetIndex >= wpOrdinaryState.pageCount) return false;
        wpCloseQuestionPicker(false);
        void wpRenderPowerPointSlide(targetIndex, targetIndex >= wpOrdinaryState.pageIndex ? 1 : -1);
        wpEnsureFullscreen();
        return true;
      }
      if (!Number.isInteger(targetIndex) || targetIndex < 0 || targetIndex >= wpState.questions.length) return false;
      wpCloseQuestionPicker(false);
      wpRenderQuestion(targetIndex);
      wpEnsureFullscreen();
      return true;
    }

    function wpClearFitTimers() {
      wpState.fitTimers.forEach((timer) => clearTimeout(timer));
      wpState.fitTimers = [];
      if (wpState.fitSettleTimer) clearTimeout(wpState.fitSettleTimer);
      wpState.fitSettleTimer = 0;
      if (wpState.fitFrame) cancelAnimationFrame(wpState.fitFrame);
      wpState.fitFrame = 0;
      wpState.fitDirty = false;
      wpState.fitPending = false;
    }

    function wpResetAdaptiveSizing() {
      if (viewport instanceof HTMLElement && viewport.classList.contains('cv7991-vertical-scroll')) {
        cv7991SetVerticalScrollMode(viewport, fitLayer, card, false);
      }
      /* Chế độ “Trình chiếu câu hỏi từ file Word” đặt kích thước và phép
         scale trực tiếp lên fitLayer bằng inline !important. Nếu chỉ xóa style
         của card như trước, khi quay lại PowerPoint các quy tắc ordinary-mode
         trong stylesheet không thể ghi đè inline !important này; sân khấu PPT
         vì thế vẫn giữ chiều rộng/chiều cao của Word và nằm ở góc trên trái.
         Luôn trả cả viewport + fitLayer về trạng thái sạch trước khi dựng bất
         kỳ kiểu trình chiếu mới nào. */
      viewport.classList.remove('cv7991-vertical-scroll', 'cv7991-horizontal-scroll');
      ['overflow', 'overflow-x', 'overflow-y'].forEach((name) => {
        viewport.style.removeProperty(name);
      });
      fitLayer.classList.remove('cv7991-proportional-canvas', 'word-presentation-region-base-hidden');
      ['position', 'left', 'top', 'right', 'bottom', 'width', 'height',
        'min-width', 'min-height', 'max-width', 'max-height', 'margin', 'padding',
        'display', 'overflow', 'transform', 'transform-origin'].forEach((name) => {
        fitLayer.style.removeProperty(name);
      });
      fitLayer.dataset.scale = '1';
      delete fitLayer.dataset.cv7991LargeCanvas;
      ['position', 'left', 'top', 'width', 'min-width', 'max-width', 'height', 'min-height',
        'max-height', 'font-size', 'overflow', 'transform', 'transform-origin'].forEach((name) => {
        card.style.removeProperty(name);
      });
      card.style.removeProperty('--wp-slide-width');
      card.style.removeProperty('--wp-slide-height');
      delete card.dataset.adaptiveFontSize;
      delete card.dataset.cv7991ViewportScale;
    }


    function wpFormulaInkMetrics(element) {
      return cv7991MeasureFormulaInkMetrics(element);
    }

    function wpFormulaAspectRatio(element, baseWidth, baseHeight) {
      const cssNumber = (name) => {
        let value = 0;
        try { value = parseFloat(element.style.getPropertyValue(name)); } catch (_) {}
        if (!(value > 0)) {
          try { value = parseFloat(getComputedStyle(element).getPropertyValue(name)); } catch (_) {}
        }
        return Number.isFinite(value) && value > 0 ? value : 0;
      };
      const candidates = [
        // Với công thức, tỷ lệ hộp mà người soạn đã đặt trong Word là chuẩn ưu tiên.
        // Tỷ lệ raster/SVG chỉ dùng dự phòng vì MathJax có thể cắt biên khác WMF gốc.
        cssNumber('--cv-word-display-ratio'),
        Number(baseWidth) > 0 && Number(baseHeight) > 0 ? Number(baseWidth) / Number(baseHeight) : 0,
        cssNumber('--cv-presenter-ratio'),
        cssNumber('--cv-source-ratio'),
      ];
      if (element instanceof HTMLImageElement) {
        const naturalWidth = Number(element.naturalWidth) || 0;
        const naturalHeight = Number(element.naturalHeight) || 0;
        if (naturalWidth > 0 && naturalHeight > 0) candidates.push(naturalWidth / naturalHeight);
      }
      const svg = element.matches && element.matches('svg')
        ? element
        : (element.querySelector ? element.querySelector('svg') : null);
      if (svg) {
        const viewBox = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (viewBox.length >= 4 && viewBox[2] > 0 && viewBox[3] > 0) candidates.push(viewBox[2] / viewBox[3]);
      }
      return candidates.find((value) => Number.isFinite(value) && value > 0.03 && value < 80) || 1;
    }

    function wpScaleInlineMathTypeFormulas(fallbackFontSize, root = card) {
      if (root instanceof Element && root.classList.contains('cv7991-source-question-layout')) return;
      if (!(root instanceof Element)) return;
      const formulas = Array.from(root.querySelectorAll('.single-exam-inline-formula'));
      if (!formulas.length) return;
      const isAllView = root.classList.contains('is-all-view')
        || !!root.closest('.word-presentation-card.is-all-view');

      formulas.forEach((element) => {
        if (!(element instanceof HTMLElement)) return;
        /* Ảnh MathType dự phòng đã được bộ Word thông thường nhận diện và đánh
           dấu. Giữ nguyên cách tính kích thước/baseline đó cho cả Bài giảng và
           Dùng câu hỏi của MVIP; không cho hệ số phóng cũ bên dưới ghi đè. */
        if (element.classList.contains('mvip-ordinary-word-sized-mathtype')
            && typeof window.cv7991ApplyOrdinaryMathTypeWordSizing === 'function') {
          try {
            window.cv7991ApplyOrdinaryMathTypeWordSizing(element.parentElement || root);
          } catch (_) {}
          return;
        }
        const baseWidth = parseFloat(element.style.getPropertyValue('--cv-formula-base-width'))
          || parseFloat(element.style.width)
          || 18;
        const baseHeight = parseFloat(element.style.getPropertyValue('--cv-formula-base-height'))
          || parseFloat(element.style.height)
          || 12;
        const singleLine = (parseFloat(element.style.getPropertyValue('--cv-formula-single-line')) || 0) >= 1;
        const lineCount = Math.max(1, Math.min(8,
          parseFloat(element.style.getPropertyValue('--cv-formula-line-count')) || (singleLine ? 1 : 2)
        ));
        cv7991ResetMathTypePromptLineCompaction(element);
        const wordEm = parseFloat(element.style.getPropertyValue('--cv-formula-word-em'));
        let localFontSize = Number(fallbackFontSize) || 0;
        try {
          const parent = element.parentElement || element;
          localFontSize = parseFloat(getComputedStyle(parent).fontSize) || localFontSize;
        } catch (_) {}
        localFontSize = Math.max(8, localFontSize || 24);
        const tableCell = element.closest('td,th');
        const pureDataTableCell = tableCell instanceof HTMLElement
          && (!!tableCell.closest('.word-presentation-card.cv7991-pure-data-table')
            || !!tableCell.closest('.single-exam-inline-table.cv7991-source-horizontal-table'));

        const fallbackEm = singleLine ? 0.86 : Math.min(4.2, 0.58 + lineCount * 0.78);
        const targetOuterEm = Math.max(0.44, Math.min(4.2,
          Number.isFinite(wordEm) && wordEm > 0 ? wordEm : fallbackEm
        ));
        const aspectRatio = wpFormulaAspectRatio(element, baseWidth, baseHeight);
        const round = (value) => Math.round(Math.max(1, Number(value) || 1) * 100) / 100;
        let targetHeight = 0;
        let targetWidth = 0;

        if (isAllView) {
          // Ở “Tất cả”, chỉ phóng công thức MathType một dòng.
          // Lấy đúng kích thước đang hiển thị ban đầu rồi nhân 2; lưu lại nguồn
          // để các lần bố trí lại không tiếp tục nhân chồng.
          if (!singleLine) return;
          let sourceWidth = parseFloat(element.style.getPropertyValue('--mvip-all-view-formula-source-width'));
          let sourceHeight = parseFloat(element.style.getPropertyValue('--mvip-all-view-formula-source-height'));
          if (!(sourceWidth > 0)) {
            sourceWidth = parseFloat(element.style.width) || baseWidth;
            element.style.setProperty('--mvip-all-view-formula-source-width', `${sourceWidth}px`);
          }
          if (!(sourceHeight > 0)) {
            sourceHeight = parseFloat(element.style.height) || baseHeight;
            element.style.setProperty('--mvip-all-view-formula-source-height', `${sourceHeight}px`);
          }
          const displayScale = cv7991MathTypeElementDisplayScale(element, lineCount);
          targetWidth = Math.max(4, sourceWidth * 2 * displayScale);
          targetHeight = Math.max(4, sourceHeight * 2 * displayScale);
        } else {
          // Kiểm tra ngay và Trình chiếu Word từng câu: tăng đồng đều 1,3 lần
          // so với cách tính kích thước hiện tại, vẫn giữ đúng tỷ lệ công thức.
          const displayScale = cv7991MathTypeElementDisplayScale(element, lineCount);
          targetHeight = Math.max(4, localFontSize * targetOuterEm * 1.5 * 1.3
            * displayScale * cv7991PresentationMathTypeScale());
          targetWidth = Math.max(4, targetHeight * aspectRatio);
        }

        /* Chỉ co riêng MathType khi nó nằm trong ô của bảng dữ liệu thuần.
           Bảng chứa hình/nhãn hình không bị tác động nên bố cục ảnh giữ nguyên bản cũ. */
        let tableCellInnerWidth = 0;
        if (pureDataTableCell) {
          try {
            const cellStyle = getComputedStyle(tableCell);
            const horizontalPadding = (parseFloat(cellStyle.paddingLeft) || 0)
              + (parseFloat(cellStyle.paddingRight) || 0);
            tableCellInnerWidth = Math.max(4,
              (Number(tableCell.clientWidth) || Number(tableCell.getBoundingClientRect().width) || 0)
              - horizontalPadding - 1
            );
          } catch (_) {}
          if (tableCellInnerWidth > 4 && targetWidth > tableCellInnerWidth) {
            const cellScale = Math.max(0.08, Math.min(1, tableCellInnerWidth / targetWidth));
            targetWidth *= cellScale;
            targetHeight *= cellScale;
          }
        }

        // Ngoài bảng dữ liệu thuần, giữ nguyên cách co cỡ chữ chung của bản cũ.
        element.style.setProperty('width', `${round(targetWidth)}px`, 'important');
        element.style.setProperty('height', `${round(targetHeight)}px`, 'important');
        element.style.setProperty('max-width', 'none', 'important');
        element.style.setProperty('max-height', 'none', 'important');
        element.style.setProperty('object-fit', 'contain', 'important');
        element.style.setProperty('object-position', 'center', 'important');
        element.style.setProperty('transform-origin', singleLine ? 'center bottom' : 'center center');

        const inlineCenterContext = !!element.closest(
          '.word-presentation-question-prompt, .word-presentation-item-content, '
          + '.single-exam-word-question, .single-exam-word-option-body'
        );
        const reserveLineBox = cv7991MathTypeNeedsReservedLineBox(element, localFontSize, targetHeight, lineCount);
        const exactBaselineDrop = cv7991MathTypeExactBaselineDropPx(element, targetWidth, targetHeight);
        if (pureDataTableCell) {
          // Trong ô bảng dữ liệu, căn giữa hình học; không dùng độ hạ baseline của công thức trong dòng chữ.
          element.classList.remove('cv-inline-baseline-formula');
          element.style.setProperty('display', 'inline-block', 'important');
          element.style.setProperty('vertical-align', 'middle', 'important');
          element.style.setProperty('transform-origin', 'center center', 'important');
          element.style.setProperty('transform', 'translateY(0px)', 'important');
          element.style.setProperty('margin-top', '0px', 'important');
          element.style.setProperty('margin-bottom', '0px', 'important');
          if (tableCellInnerWidth > 4) {
            element.style.setProperty('max-width', `${Math.round(tableCellInnerWidth * 100) / 100}px`, 'important');
          }
        } else if (reserveLineBox) {
          cv7991ApplyReservedMathTypeLineBox(element);
        } else if (Number.isFinite(exactBaselineDrop)) {
          const fineTuneLowering = cv7991MathTypeFineTuneLoweringPx(localFontSize, lineCount);
          const adjustedBaselineDrop = Math.min(targetHeight * 0.76, exactBaselineDrop + fineTuneLowering);
          element.classList.add('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'baseline', 'important');
          element.style.setProperty('transform-origin', 'center bottom', 'important');
          element.style.setProperty('transform', `translateY(${Math.round(adjustedBaselineDrop * 100) / 100}px)`, 'important');
        } else if (inlineCenterContext && singleLine) {
          const inkMetrics = wpFormulaInkMetrics(element);
          const bottomPaddingRatio = Math.max(0, Math.min(0.4,
            Number(inkMetrics && inkMetrics.bottomPaddingRatio) || 0.08
          ));
          const transparentBottom = targetHeight * bottomPaddingRatio;
          const textInkDescent = cv7991MeasureInlineTextInkDescent(element, localFontSize);
          const opticalLowering = cv7991MathTypeOpticalLoweringPx(localFontSize, lineCount);
          const maxDrop = Math.min(localFontSize * 0.44, targetHeight * 0.60);
          const drop = Math.max(0, Math.min(maxDrop, transparentBottom + textInkDescent + opticalLowering));
          element.classList.add('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'baseline', 'important');
          element.style.setProperty('transform-origin', 'center bottom', 'important');
          element.style.setProperty('transform', `translateY(${Math.round(drop * 100) / 100}px)`, 'important');
        } else if (inlineCenterContext) {
          const inkMetrics = wpFormulaInkMetrics(element);
          const topPaddingRatio = Math.max(0, Math.min(0.48,
            Number(inkMetrics && inkMetrics.topPaddingRatio) || 0.08
          ));
          const bottomPaddingRatio = Math.max(0, Math.min(0.48,
            Number(inkMetrics && inkMetrics.bottomPaddingRatio) || 0.08
          ));
          const inkCenterDrop = (bottomPaddingRatio - topPaddingRatio) * targetHeight * 0.5;
          const opticalDrop = element.closest('.word-presentation-question-prompt')
            ? localFontSize * 0.025 : 0;
          const mathTypeLowering = cv7991MathTypeOpticalLoweringPx(localFontSize, lineCount);
          const drop = Math.max(-localFontSize * 0.08,
            Math.min(localFontSize * 0.30, inkCenterDrop + opticalDrop + mathTypeLowering));
          element.classList.remove('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'middle', 'important');
          element.style.setProperty('transform-origin', 'center center', 'important');
          element.style.setProperty('transform', `translateY(${Math.round(drop * 100) / 100}px)`, 'important');
        } else if (singleLine) {
          const inkMetrics = wpFormulaInkMetrics(element);
          const bottomPaddingRatio = Math.max(0, Math.min(0.4,
            Number(inkMetrics && inkMetrics.bottomPaddingRatio) || 0.08
          ));
          const transparentBottom = targetHeight * bottomPaddingRatio;
          const textInkDescent = cv7991MeasureInlineTextInkDescent(element, localFontSize);
          const opticalLowering = cv7991MathTypeOpticalLoweringPx(localFontSize, lineCount);
          const maxDrop = Math.min(localFontSize * 0.44, targetHeight * 0.60);
          const drop = Math.max(0, Math.min(maxDrop, transparentBottom + textInkDescent + opticalLowering));
          element.classList.add('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'baseline', 'important');
          element.style.setProperty('transform-origin', 'center bottom', 'important');
          element.style.setProperty('transform', `translateY(${Math.round(drop * 100) / 100}px)`, 'important');
        } else {
          element.classList.remove('cv-inline-baseline-formula');
          element.style.setProperty('vertical-align', 'middle', 'important');
          element.style.setProperty('transform', 'translateY(0)', 'important');
        }

        if (element.classList.contains('single-exam-inline-vector')) {
          const svg = element.querySelector('svg');
          if (svg) {
            svg.setAttribute('width', '100%');
            svg.setAttribute('height', '100%');
            svg.setAttribute('preserveAspectRatio', 'xMidYMid meet');
            svg.style.width = '100%';
            svg.style.height = '100%';
            svg.style.maxWidth = '100%';
            svg.style.maxHeight = '100%';
            svg.style.overflow = 'visible';
          }
        }
        cv7991ApplyMathTypePromptLineCompaction(element, localFontSize, targetHeight);
      });
    }

    function wpCardMeasurements() {
      return cv7991PresentationCardMeasurements(card);
    }

    function wpPureHorizontalTableWithoutItemsFits() {
      return cv7991PureHorizontalTableWithoutItemsFits(card);
    }

    function wpPureHorizontalTableWithoutItemsVerticalFits() {
      return cv7991HorizontalTableVerticalFits(card);
    }

    function wpCardFitsInside(availableWidth, availableHeight) {
      return cv7991PresentationCardFits(card, availableWidth, availableHeight);
    }

    function wpApplySafetyScale(availableWidth, availableHeight) {
      const measured = wpCardMeasurements();
      const scale = Math.max(0.04, Math.min(1, availableWidth / measured.width, availableHeight / measured.height));
      const rounded = Math.round(scale * 10000) / 10000;
      fitLayer.style.transform = `translate(-50%, -50%) scale(${rounded})`;
      fitLayer.dataset.scale = String(rounded);
    }

    function fitWordPresentationSlide() {
      if (presenter.hidden || !viewport.clientWidth || !viewport.clientHeight) return;

      if (wpState.documentMode === 'ordinary') {
        wpFitOrdinaryPage();
        return;
      }

      if (wpState.viewMode === 'all') {
        wpApplyAllViewCanvasStyles();
        wpPrepareAllViewMediaLayouts();
        return;
      }

      if (cv7991FitSourceQuestion(viewport, fitLayer, card)) return;

      const previousScrollScale = Math.max(0.01,
        parseFloat(card.dataset.cv7991ViewportScale) || parseFloat(fitLayer.dataset.scale) || 1
      );
      const previousLogicalScrollTop = viewport.classList.contains('cv7991-vertical-scroll')
        ? Math.max(0, Number(viewport.scrollTop) || 0) / previousScrollScale
        : 0;
      const canvas = cv7991ResolveLargeCanvas(
        viewport,
        typeof wordPresentationIsFullscreen === 'function' && wordPresentationIsFullscreen(),
        'word'
      );
      cv7991SetVerticalScrollMode(viewport, fitLayer, card, false);
      const availableWidth = canvas.designWidth;
      const availableHeight = canvas.designHeight;

      fitLayer.style.setProperty('position', 'absolute', 'important');
      fitLayer.style.setProperty('left', '50%', 'important');
      fitLayer.style.setProperty('top', '50%', 'important');
      fitLayer.style.setProperty('width', `${availableWidth}px`, 'important');
      fitLayer.style.setProperty('height', `${availableHeight}px`, 'important');
      fitLayer.style.setProperty('transform', 'translate(-50%, -50%) scale(1)', 'important');
      fitLayer.style.setProperty('transform-origin', 'center center', 'important');
      fitLayer.dataset.scale = '1';

      // Màn hình chờ chỉ cần co theo kích thước khung hiện tại, không tham gia
      // quy tắc cỡ chữ logic tối thiểu 20 pt của nội dung câu hỏi.
      if (card.classList.contains('is-loading')) {
        wpResetAdaptiveSizing();
        wpApplySafetyScale(canvas.viewportWidth, canvas.viewportHeight);
        return;
      }

      const hasMediaLayout = card.classList.contains('has-presentation-media');
      card.style.setProperty('width', `${availableWidth}px`, 'important');
      card.style.setProperty('min-width', `${availableWidth}px`, 'important');
      card.style.setProperty('max-width', `${availableWidth}px`, 'important');
      card.style.setProperty('--wp-slide-width', `${availableWidth}px`);
      card.style.setProperty('--wp-slide-height', `${availableHeight}px`);

      if (hasMediaLayout) {
        card.style.setProperty('height', `${availableHeight}px`, 'important');
        card.style.setProperty('min-height', `${availableHeight}px`, 'important');
        card.style.setProperty('max-height', `${availableHeight}px`, 'important');
      } else {
        card.style.removeProperty('height');
        card.style.removeProperty('min-height');
        card.style.removeProperty('max-height');
        card.style.removeProperty('--wp-media-target-width');
        card.style.removeProperty('--wp-media-target-height');
      }
      if (hasMediaLayout) wpApplySingleViewMediaMetrics();

      const minimumFontSize = CV7991_LARGE_SCREEN_MIN_FONT_PX;
      const maximumFontSize = hasMediaLayout
        ? (card.classList.contains('media-layout-table-vertical') ? 86 : 74)
        : Math.max(84, Math.min(176, Math.floor(availableHeight * 0.29)));
      let low = minimumFontSize;
      let high = maximumFontSize;
      let best = minimumFontSize;

      const applyAdaptiveFontSize = (fontSize) => {
        card.style.setProperty('font-size', `${fontSize}px`, 'important');
        wpScaleInlineMathTypeFormulas(fontSize, card);
        cv7991RefreshSingleLineOptionClasses(card);
        wpScaleInlineMathTypeFormulas(fontSize, card);
        if (hasMediaLayout) cv7991ApplyBottomRightMediaOptionFlow(card);
      };

      applyAdaptiveFontSize(minimumFontSize);
      if (wpCardFitsInside(availableWidth, availableHeight)) {
        for (let round = 0; round < 16; round += 1) {
          const candidate = (low + high) / 2;
          applyAdaptiveFontSize(candidate);
          if (wpCardFitsInside(availableWidth, availableHeight)) {
            best = candidate;
            low = candidate;
          } else {
            high = candidate;
          }
        }
      }

      const finalFontSize = Math.max(minimumFontSize, Math.floor(best * 10) / 10);
      applyAdaptiveFontSize(finalFontSize);
      card.dataset.adaptiveFontSize = String(finalFontSize);
      card.dataset.cv7991LogicalFontSize = String(finalFontSize);
      card.dataset.cv7991LogicalFontPoints = String(Math.round(finalFontSize * 72 / 96 * 100) / 100);
      card.dataset.cv7991DisplayedFontSize = String(Math.round(finalFontSize * canvas.scale * 100) / 100);
      card.dataset.cv7991DisplayedFontPoints = String(Math.round(finalFontSize * canvas.scale * 72 / 96 * 100) / 100);

      const measured = wpCardMeasurements();
      const measuredHeight = cv7991CardVerticalExtent(card);
      const verticalOverflow = measuredHeight > availableHeight + 1
        || !wpPureHorizontalTableWithoutItemsVerticalFits();
      const horizontalOverflow = measured.width > availableWidth + 1;
      if (verticalOverflow || horizontalOverflow) {
        if (verticalOverflow && (card.classList.contains('media-layout-figure')
          || card.classList.contains('media-layout-mixed'))) {
          cv7991ResetBottomRightMediaOptionFlow(card);
        }
        const scrollOptions = {
          designWidth: availableWidth,
          designHeight: availableHeight,
          viewportScale: canvas.scale,
          contentWidth: measured.width,
          contentHeight: measuredHeight,
        };
        cv7991SetVerticalScrollMode(viewport, fitLayer, card, true, scrollOptions);
        applyAdaptiveFontSize(finalFontSize);
        const refreshed = wpCardMeasurements();
        scrollOptions.contentWidth = Math.max(measured.width, refreshed.width);
        scrollOptions.contentHeight = Math.max(measuredHeight, cv7991CardVerticalExtent(card));
        cv7991SetVerticalScrollMode(viewport, fitLayer, card, true, scrollOptions);
        void viewport.offsetHeight;
        viewport.scrollTop = previousLogicalScrollTop * canvas.scale;
        viewport.scrollLeft = 0;
        return;
      }

      // Không còn hệ số “co bảo hiểm” sau khi đã chạm 20 pt. Màn hình lớn luôn
      // nhìn đúng cỡ chữ logic; màn hình nhỏ chỉ nhân một hệ số cho toàn bộ slide.
      const logicalLayerHeight = hasMediaLayout ? availableHeight : measuredHeight;
      cv7991ApplyProportionalCanvas(viewport, fitLayer, card, canvas, logicalLayerHeight);
    }

    function wpFitSignature() {
      const pendingImages = Array.from(card.querySelectorAll('img')).reduce((count, image) => {
        return count + ((!image.complete || !image.naturalWidth) ? 1 : 0);
      }, 0);
      return [
        Math.round(Number(viewport.clientWidth) || 0),
        Math.round(Number(viewport.clientHeight) || 0),
        wpState.index,
        wpState.viewMode,
        wpState.documentMode,
        wpOrdinaryState.pageIndex,
        wpOrdinaryState.pageCount,
        wordPresentationIsFullscreen() ? 1 : 0,
        wpScanSplitIsActive() ? 1 : 0,
        wpState.mediaLayoutToken,
        wpState.answerVisible ? 1 : 0,
        wpState.tfAnswerRevealIndex,
        wpState.essayAnswerRevealIndex,
        card.className,
        card.querySelectorAll('.word-presentation-item').length,
        card.querySelectorAll('.single-exam-inline-formula').length,
        pendingImages,
      ].join('|');
    }

    function wpRunFitOnce() {
      if (wpState.fitRunning) {
        wpState.fitPending = true;
        return;
      }
      wpState.fitRunning = true;
      try {
        fitWordPresentationSlide();
      } catch (_) {
      } finally {
        wpState.fitRunning = false;
        wpState.fitLastRunAt = performance.now();
        wpState.fitLastSignature = wpFitSignature();
        if (wpState.fitPending) {
          wpState.fitPending = false;
          wpState.fitDirty = true;
          if (!wpState.fitFrame) {
            wpState.fitFrame = requestAnimationFrame(() => {
              wpState.fitFrame = 0;
              if (!wpState.fitDirty) return;
              wpState.fitDirty = false;
              wpRunFitOnce();
            });
          }
        }
      }
    }

    function wpRequestFit(forceNow = false) {
      const regionTool = wpRegionState();
      if (regionTool.zoomed || regionTool.selecting) return;
      if (wpState.viewMode === 'all') return;

      const now = performance.now();
      const signature = wpFitSignature();
      const sameRecentLayout = signature === wpState.fitLastSignature
        && now - wpState.fitLastRunAt < 140;

      wpState.fitDirty = true;
      if (forceNow && !sameRecentLayout && !wpState.fitRunning) {
        wpState.fitDirty = false;
        wpRunFitOnce();
      }

      if (!wpState.fitFrame) {
        wpState.fitFrame = requestAnimationFrame(() => {
          wpState.fitFrame = 0;
          if (!wpState.fitDirty) return;
          const nextSignature = wpFitSignature();
          if (nextSignature === wpState.fitLastSignature
            && performance.now() - wpState.fitLastRunAt < 90) {
            wpState.fitDirty = false;
            return;
          }
          wpState.fitDirty = false;
          wpRunFitOnce();
        });
      }

      /* Một lượt cuối sau khi ảnh/font hoặc native fullscreen đã ổn định là đủ.
         Không còn ba hẹn giờ 80/220/520 ms cho MỖI sự kiện resize, vì chính chuỗi
         đó làm bốn công thức MathType của Câu 15 nhảy qua lại liên tục. */
      if (wpState.fitSettleTimer) clearTimeout(wpState.fitSettleTimer);
      wpState.fitSettleTimer = setTimeout(() => {
        wpState.fitSettleTimer = 0;
        if (!wordPresentationIsOpen() || wpState.viewMode === 'all') return;
        const settledSignature = wpFitSignature();
        if (settledSignature !== wpState.fitLastSignature
          || performance.now() - wpState.fitLastRunAt > 420) {
          wpState.fitDirty = false;
          wpRunFitOnce();
        }
      }, 180);
    }

    function wpTfAnswerRows() {
      return Array.from(card.querySelectorAll('.word-presentation-items.is-statements .word-presentation-item[data-letter]'));
    }

    function wpQuestionSolutionText(question) {
      return String(question && (question.guide || question.solution || question.explanation) || '').trim();
    }

    function wpQuestionHasSolution(question) {
      /* Nút Lời giải hai bước chỉ dành cho trắc nghiệm nhiều lựa chọn và
         Đúng-Sai. Với Tự luận/Trả lời ngắn, Lời giải là đáp án trực tiếp như
         cơ chế ổn định của index.htmlluu1. */
      const format = String(question && question.format || '').trim().toLowerCase();
      return (format === 'mc' || format === 'tf') && !!wpQuestionSolutionText(question);
    }

    function wpOpenQuestionSolution(question) {
      const raw = wpQuestionSolutionText(question);
      if (!raw) return false;
      wpOpenAnswerModal('Lời giải', wpRichParagraphs(raw, { firstInline:false }));
      return true;
    }

    // API chỉ đọc dành cho chế độ Chia đôi màn hình. Lời giải được dựng bằng
    // đúng bộ render Word hiện tại nên vẫn giữ công thức MathType/ảnh/định dạng.
    window.mvipWordSplitSolutionApi = {
      format() {
        const question = wpState.questions[wpState.index] || null;
        return String(question && question.format || '').trim().toLowerCase();
      },
      hasSolution() {
        const question = wpState.questions[wpState.index] || null;
        return wpQuestionHasSolution(question);
      },
      cloneSolutionNode() {
        const question = wpState.questions[wpState.index] || null;
        const raw = wpQuestionSolutionText(question);
        if (!raw) return null;
        const wrap = document.createElement('div');
        wrap.className = 'word-presentation-answer-content';
        wrap.innerHTML = wpRichParagraphs(raw, { firstInline:false });
        return wrap;
      }
    };

    function wpSetAnswerButtonActive(active) {
      const question = wpState.questions[wpState.index] || null;
      const groupedAnswer = !!(question && wpState.viewMode === 'single'
        && (question.format === 'tf'
          || (question.format === 'essay' && Array.isArray(question.essayAnswerParts)
            && question.essayAnswerParts.length >= 2)));

      const hasSolution = wpQuestionHasSolution(question);
      wpState.answerVisible = !!active;
      answerBtn.classList.toggle('is-active', !!active);
      answerBtn.setAttribute('aria-pressed', active ? 'true' : 'false');
      answerBtn.textContent = active ? (hasSolution ? 'Lời giải' : 'Ẩn đáp án') : 'Đáp án';
      const essayChooser = groupedAnswer && question.format === 'essay';
      answerBtn.title = active
        ? (hasSolution ? 'Xem lời giải đầy đủ của câu hiện tại'
          : (groupedAnswer ? 'Ẩn toàn bộ đáp án của câu hiện tại' : 'Ẩn đáp án của câu hiện tại'))
        : (essayChooser ? 'Chọn ý để xem đáp án'
          : (groupedAnswer ? 'Hiện toàn bộ đáp án của câu hiện tại' : 'Mở đáp án của câu hiện tại'));
    }

    function wpApplyHttcBadge(question) {
      if (!(httcBadgeEl instanceof HTMLElement)) return;
      const code = String(question && question.httcCode || '').trim();
      if (!code) {
        httcBadgeEl.hidden = true;
        httcBadgeEl.textContent = '';
        httcBadgeEl.removeAttribute('title');
        httcBadgeEl.removeAttribute('aria-label');
        return;
      }
      const titleMap = { 'CN':'HTTC: Cá nhân', 'NĐ':'HTTC: Nhóm đôi', 'NL':'HTTC: Nhóm lớn' };
      httcBadgeEl.hidden = false;
      httcBadgeEl.textContent = code;
      httcBadgeEl.title = titleMap[code] || `HTTC: ${code}`;
      httcBadgeEl.setAttribute('aria-label', titleMap[code] || `HTTC: ${code}`);
    }

    const wpAnswerDialogDragState = {
      active: false,
      pointerId: null,
      startX: 0,
      startY: 0,
      originX: 0,
      originY: 0,
      x: 0,
      y: 0,
      minX: 0,
      maxX: 0,
      minY: 0,
      maxY: 0,
    };

    function wpSetAnswerDialogOffset(x, y) {
      const nextX = Number.isFinite(Number(x)) ? Number(x) : 0;
      const nextY = Number.isFinite(Number(y)) ? Number(y) : 0;
      wpAnswerDialogDragState.x = nextX;
      wpAnswerDialogDragState.y = nextY;
      answerDialogEl.style.setProperty('--word-answer-drag-x', `${Math.round(nextX)}px`);
      answerDialogEl.style.setProperty('--word-answer-drag-y', `${Math.round(nextY)}px`);
    }

    function wpAnswerDialogDragBounds() {
      if (!answerModal || !answerDialogEl || answerModal.hidden) return null;
      const modalRect = answerModal.getBoundingClientRect();
      const dialogRect = answerDialogEl.getBoundingClientRect();
      const handleRect = answerHeadEl ? answerHeadEl.getBoundingClientRect() : dialogRect;
      const currentX = wpAnswerDialogDragState.x;
      const currentY = wpAnswerDialogDragState.y;
      const baseLeft = dialogRect.left - currentX;
      const baseRight = dialogRect.right - currentX;
      const baseTop = dialogRect.top - currentY;
      const baseBottom = dialogRect.bottom - currentY;
      const visibleWidth = Math.min(220, Math.max(96, dialogRect.width * 0.22));
      const handleHeight = Math.max(48, Math.min(handleRect.height || 58, modalRect.height));

      let minX = modalRect.left + visibleWidth - baseRight;
      let maxX = modalRect.right - visibleWidth - baseLeft;
      let minY = modalRect.top + 4 - baseTop;
      let maxY = modalRect.bottom - handleHeight - 4 - baseTop;

      if (minX > maxX) {
        const middleX = (minX + maxX) / 2;
        minX = middleX;
        maxX = middleX;
      }
      if (minY > maxY) {
        const middleY = (minY + maxY) / 2;
        minY = middleY;
        maxY = middleY;
      }
      return { minX, maxX, minY, maxY };
    }

    function wpClampAnswerDialogPosition() {
      const bounds = wpAnswerDialogDragBounds();
      if (!bounds) return;
      const x = Math.min(bounds.maxX, Math.max(bounds.minX, wpAnswerDialogDragState.x));
      const y = Math.min(bounds.maxY, Math.max(bounds.minY, wpAnswerDialogDragState.y));
      wpSetAnswerDialogOffset(x, y);
    }

    function wpBeginAnswerDialogDrag(event) {
      if (!answerModal || !answerDialogEl || !answerHeadEl || answerModal.hidden) return;
      if (event.pointerType === 'mouse' && event.button !== 0) return;
      if (event.isPrimary === false) return;
      if (event.target && event.target.closest('button, a, input, select, textarea, label')) return;

      const bounds = wpAnswerDialogDragBounds();
      if (!bounds) return;
      wpAnswerDialogDragState.active = true;
      wpAnswerDialogDragState.pointerId = event.pointerId;
      wpAnswerDialogDragState.startX = event.clientX;
      wpAnswerDialogDragState.startY = event.clientY;
      wpAnswerDialogDragState.originX = wpAnswerDialogDragState.x;
      wpAnswerDialogDragState.originY = wpAnswerDialogDragState.y;
      wpAnswerDialogDragState.minX = bounds.minX;
      wpAnswerDialogDragState.maxX = bounds.maxX;
      wpAnswerDialogDragState.minY = bounds.minY;
      wpAnswerDialogDragState.maxY = bounds.maxY;
      answerDialogEl.classList.add('is-dragging');
      try { answerDialogEl.setPointerCapture(event.pointerId); } catch (_) {}
      event.preventDefault();
    }

    function wpMoveAnswerDialogDrag(event) {
      if (!wpAnswerDialogDragState.active || event.pointerId !== wpAnswerDialogDragState.pointerId) return;
      const proposedX = wpAnswerDialogDragState.originX + event.clientX - wpAnswerDialogDragState.startX;
      const proposedY = wpAnswerDialogDragState.originY + event.clientY - wpAnswerDialogDragState.startY;
      const x = Math.min(wpAnswerDialogDragState.maxX, Math.max(wpAnswerDialogDragState.minX, proposedX));
      const y = Math.min(wpAnswerDialogDragState.maxY, Math.max(wpAnswerDialogDragState.minY, proposedY));
      wpSetAnswerDialogOffset(x, y);
      event.preventDefault();
    }

    function wpEndAnswerDialogDrag(event) {
      if (!wpAnswerDialogDragState.active) return;
      if (event && event.pointerId != null && event.pointerId !== wpAnswerDialogDragState.pointerId) return;
      const pointerId = wpAnswerDialogDragState.pointerId;
      wpAnswerDialogDragState.active = false;
      wpAnswerDialogDragState.pointerId = null;
      answerDialogEl.classList.remove('is-dragging');
      if (pointerId != null) {
        try {
          if (answerDialogEl.hasPointerCapture(pointerId)) answerDialogEl.releasePointerCapture(pointerId);
        } catch (_) {}
      }
    }

    function wpResetAnswerDialogPosition() {
      wpEndAnswerDialogDrag();
      wpSetAnswerDialogOffset(0, 0);
    }

    function wpCloseAnswerModal() {
      wpEndAnswerDialogDrag();
      if (answerModal.hidden) return;
      if (answerContentEl.querySelector('[data-word-essay-answers]')) {
        wpState.essayAnswerRevealIndex = 0;
        wpSetAnswerButtonActive(false);
      }
      answerModal.hidden = true;
      answerModal.classList.remove('cv7991-ndtc-single-image-answer');
      answerContentEl.innerHTML = '';
      answerContentEl.cv7991ZoomQuestionSource = null;
      answerContentEl.classList.remove('cv7991-question-has-shapes');
      answerTitleEl.textContent = 'Đáp án';
      if (!wpState.answerVisible) wpSetAnswerButtonActive(false);
    }

    function wpOpenAnswerModal(title, html) {
      const wasHidden = answerModal.hidden;
      answerTitleEl.textContent = String(title || 'Đáp án');
      answerContentEl.innerHTML = String(html || '');
      /* Chỉ áp dụng khi Giải NDTC có đúng MỘT hình và không kèm lời giải
         bằng chữ. Bỏ qua dòng “Hướng dẫn giải:” do bộ tách NDTC tự thêm. */
      const currentNdtc = wpState.questions[wpState.index];
      const answerPictureNodes = Array.from(answerContentEl.querySelectorAll(
        'img, canvas, .single-exam-inline-vector, .single-exam-word-group-figure'
      )).filter((element, index, list) => !list.some((other, otherIndex) =>
        otherIndex !== index && other.contains(element)
      ));
      const answerIsOnlyImage = !!(currentNdtc && currentNdtc.isNdtc
        && answerPictureNodes.length === 1
        && !answerContentEl.querySelector('table, .single-exam-inline-table')
        && !String(answerContentEl.textContent || '').replace(
          /(?:Hướng\s*dẫn\s*giải|Lời\s*giải|Giải\s*NDTC|Đáp\s*án)\s*[:：]?/gi, ''
        ).replace(/\s+/g, '').trim());
      answerModal.classList.toggle('cv7991-ndtc-single-image-answer', answerIsOnlyImage);
      if (answerIsOnlyImage) {
        /* Bỏ riêng nhãn “Hướng dẫn giải:” do bộ tách NDTC tự thêm,
           để ảnh được dùng trọn phần còn lại của hộp lời giải. */
        answerContentEl.querySelectorAll('.cv7991-presentation-text-paragraph').forEach((para) => {
          const text = String(para.textContent || '').replace(/\s+/g, ' ').trim();
          if (/^(?:Hướng\s*dẫn\s*giải|Lời\s*giải)\s*[:：]?$/i.test(text)) {
            para.style.setProperty('display', 'none', 'important');
          }
        });
      }
      answerContentEl.cv7991ZoomQuestionSource = wpState.viewMode === 'all'
        ? card.querySelector(`.word-presentation-all-question[data-question-index="${wpState.index}"]`)
        : card;
      answerModal.hidden = false;
      if (wasHidden) wpResetAnswerDialogPosition();
      wpPrepareDirectImageZoom(answerContentEl);
      if (!wpState.answerVisible) wpSetAnswerButtonActive(false);
      requestAnimationFrame(() => {
        wpClampAnswerDialogPosition();
        try { answerCloseBtn.focus({ preventScroll: true }); } catch (_) {}
      });
    }

    function wpRemoveTfStatusMarks(kind = '') {
      const selector = kind === 'answer'
        ? '.word-presentation-tf-answer-mark'
        : (kind === 'result'
          ? '.word-presentation-tf-result-mark'
          : (kind === 'manual' ? '.word-presentation-tf-manual-mark' : '.word-presentation-tf-status-mark'));
      card.querySelectorAll(selector).forEach((mark) => {
        const row = mark.closest('.word-presentation-item');
        mark.remove();
        if (row) {
          if (!row.querySelector('.word-presentation-tf-answer-mark')) row.classList.remove('has-answer-mark');
          if (!row.querySelector('.word-presentation-tf-result-mark')) row.classList.remove('has-result-mark');
          if (!row.querySelector('.word-presentation-tf-manual-mark')) row.classList.remove('has-manual-mark');
        }
      });
    }

    function wpSetTfStatusMark(row, markValue, kind = 'answer') {
      if (!(row instanceof Element)) return null;
      const mark = String(markValue || '').trim().toUpperCase() === 'Đ' ? 'Đ' : 'S';
      const kindClass = kind === 'result'
        ? 'word-presentation-tf-result-mark'
        : (kind === 'manual' ? 'word-presentation-tf-manual-mark' : 'word-presentation-tf-answer-mark');
      const rowClass = kind === 'result'
        ? 'has-result-mark'
        : (kind === 'manual' ? 'has-manual-mark' : 'has-answer-mark');
      let badge = row.querySelector(`.${kindClass}`);
      if (!badge) {
        badge = document.createElement('span');
        badge.className = `word-presentation-tf-status-mark ${kindClass}`;
        row.appendChild(badge);
      }
      badge.textContent = mark;
      badge.classList.toggle('is-true', mark === 'Đ');
      badge.classList.toggle('is-false', mark === 'S');
      row.classList.add(rowClass);
      return badge;
    }

    function wpResetScanRevealUi() {
      card.querySelectorAll('.word-presentation-item.is-scan-correct-answer, .word-presentation-item.is-scan-answer-error').forEach((el) => el.classList.remove('is-scan-correct-answer', 'is-scan-answer-error'));
      wpRemoveTfStatusMarks('result');
    }

    function wpResetAnswerUi() {
      card.querySelectorAll('.cv7991-tf-choice-wrong').forEach((button) => button.classList.remove('cv7991-tf-choice-wrong'));
      card.querySelectorAll('.word-presentation-item.is-correct-answer, .word-presentation-item.is-wrong-answer, .word-presentation-item.cv7991-answer-correct, .word-presentation-item.cv7991-answer-wrong, .word-presentation-item.cv7991-answer-flash').forEach((el) => el.classList.remove('is-correct-answer', 'is-wrong-answer', 'cv7991-answer-correct', 'cv7991-answer-wrong', 'cv7991-answer-flash'));
      wpRemoveTfStatusMarks('answer');
      wpState.tfAnswerRevealIndex = 0;
      wpState.essayAnswerRevealIndex = 0;
      wpState.answerVisible = false;
      wpSetAnswerButtonActive(false);
      wpCloseAnswerModal();
    }

    function wpHighlightCorrectItems(question, animate = false) {
      const isTf = !!(question && question.format === 'tf');
      const tfMarks = isTf ? wpManualTfMarkMap(question) : {};
      const wanted = new Set((Array.isArray(question && question.correctLetters) ? question.correctLetters : [])
        .map((item) => String(item || '').trim().toLowerCase())
        .filter(Boolean));
      let highlighted = 0;
      card.querySelectorAll('.word-presentation-item[data-letter]').forEach((el) => {
        const value = String(el.getAttribute('data-letter') || '').trim().toLowerCase();
        el.classList.remove('is-correct-answer', 'is-wrong-answer', 'cv7991-answer-correct', 'cv7991-answer-wrong', 'cv7991-answer-flash');
        el.querySelectorAll('.cv7991-tf-choice-wrong').forEach((button) => button.classList.remove('cv7991-tf-choice-wrong'));
        el.querySelectorAll('.word-presentation-tf-answer-mark').forEach((mark) => mark.remove());
        el.classList.remove('has-answer-mark');
        if (isTf) {
          const scanMark = wpTfScanResultMark(question, value);
          if (scanMark) {
            wpSyncTfChoice(el, scanMark, true);
            return;
          }
          const expected = wpExpectedManualTfMark(question, value);
          if (!tfMarks[value] || !expected) return;
          el.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]').forEach((button) => {
            const choice = String(button.getAttribute('data-tf-choice') || '').trim().toUpperCase();
            button.classList.toggle('cv7991-tf-choice-wrong', choice === tfMarks[value] && choice !== expected);
          });
          highlighted += 1;
          return;
        }
        if (!wanted.has(value)) return;
        el.classList.add('cv7991-answer-correct');
        if (animate) {
          void el.offsetWidth;
          el.classList.add('cv7991-answer-flash');
        }
        highlighted += 1;
      });
      return highlighted;
    }

    function wpMissingAnswerMessage() {
      return 'Bạn chưa soạn đáp án hoặc đáp án của bạn không đúng mẫu quy định';
    }

    function wpInvalidMultipleChoiceAnswerMessage() {
      return 'Đáp án câu này không hợp lệ vì có nhiều hơn 01 phương án được chọn';
    }

    function wpHasInvalidMultipleChoiceAnswer(question) {
      return !!(question && question.format === 'mc'
        && (question.invalidMultipleChoiceAnswer
          || (Array.isArray(question.correctLetters) && question.correctLetters.length > 1)));
    }

    function wpManualMcIsCorrect(question) {
      const selected = wpManualSelectionSet(question);
      const correct = new Set((Array.isArray(question && question.correctLetters) ? question.correctLetters : [])
        .map((value) => String(value || '').trim().toLowerCase())
        .filter(Boolean));
      if (!question || !question.hasParsedAnswer || selected.size !== 1 || correct.size < 1) return false;
      return correct.has(Array.from(selected)[0]);
    }

    function wpManualTfCorrectCount(question) {
      const marks = wpManualTfMarkMap(question);
      const statements = Array.isArray(question && question.statements) ? question.statements.slice(0, 4) : [];
      let count = 0;
      statements.forEach((statement, index) => {
        const key = String(statement && statement.letter || ['a','b','c','d'][index] || '').trim().toLowerCase();
        const expected = wpExpectedManualTfMark(question, key);
        if (marks[key] && expected && marks[key] === expected) count += 1;
      });
      return Math.max(0, Math.min(4, count));
    }

    function wpPlayManualFeedback(question) {
      if (!question) return;
      if (question.format === 'tf') {
        if (typeof window.cv7991PlayTrueFalseFeedback === 'function') {
          window.cv7991PlayTrueFalseFeedback(wpManualTfCorrectCount(question));
        }
      } else if (question.format === 'mc') {
        if (typeof window.cv7991PlayMultipleChoiceFeedback === 'function') {
          window.cv7991PlayMultipleChoiceFeedback(wpManualMcIsCorrect(question));
        }
      }
    }

    function wpEssayAnswerChooserHtml(question) {
      const parts = question.essayAnswerParts;
      return `<div class="word-presentation-essay-answer-chooser" data-word-essay-answers="${wpState.index}" data-word-essay-file="${wpEscape(wpState.fileUid)}">
        <div class="word-presentation-essay-answer-buttons" role="group" aria-label="Chọn ý để xem đáp án">${parts.map((part, index) =>
          `<button type="button" class="word-presentation-essay-answer-button" data-word-essay-answer="${index}" aria-pressed="false" aria-label="Xem đáp án ý ${wpEscape(part.letter)}">${wpEscape(part.letter)}</button>`
        ).join('')}<button type="button" class="word-presentation-essay-answer-button" data-word-essay-answer="all" aria-pressed="false" aria-label="Xem đáp án tất cả các ý">Tất cả</button></div>
        <div class="word-presentation-essay-answer-detail" data-word-essay-detail aria-live="polite" hidden></div>
      </div>`;
    }

    function wpChooseEssayAnswerPart(event) {
      const target = event.target instanceof Element ? event.target : null;
      const button = target && target.closest('button[data-word-essay-answer]');
      if (!button) return;
      const chooser = button.closest('[data-word-essay-answers]');
      if (!chooser || chooser.dataset.wordEssayFile !== wpState.fileUid) return;
      const questionIndex = Number(chooser.dataset.wordEssayAnswers);
      const showAll = button.dataset.wordEssayAnswer === 'all';
      const partIndex = Number(button.dataset.wordEssayAnswer);
      const question = Number.isInteger(questionIndex) ? wpState.questions[questionIndex] : null;
      const parts = question && question.format === 'essay' && Array.isArray(question.essayAnswerParts)
        ? question.essayAnswerParts : [];
      const selectedParts = showAll ? parts : (Number.isInteger(partIndex) && parts[partIndex] ? [parts[partIndex]] : []);
      const detail = chooser.querySelector('[data-word-essay-detail]');
      if (!selectedParts.length || !detail) return;
      event.preventDefault();
      event.stopImmediatePropagation();
      if (button.getAttribute('aria-pressed') === 'true') return;

      // Hiện ý đã chọn hoặc toàn bộ các ý theo thứ tự, giữ hình và bảng của từng ý.
      detail.innerHTML = `<div class="word-presentation-answer-parts">${selectedParts.map((part) => {
        const body = String(part.text || '').trim();
        return `<div class="word-presentation-answer-part"><strong class="word-presentation-answer-part-label">${wpEscape(part.letter)}.</strong><div class="word-presentation-answer-part-content">${body
          ? wpRichParagraphs(body, { firstInline:false })
          : `<span>Chưa có đáp án riêng cho ý ${wpEscape(part.letter)} trong tài liệu.</span>`}</div></div>`;
      }).join('')}</div>`;
      detail.hidden = false;
      chooser.querySelectorAll('[data-word-essay-answer]').forEach((item) => {
        const active = item === button;
        item.setAttribute('aria-pressed', active ? 'true' : 'false');
        item.classList.toggle('is-active', active);
      });
      wpState.essayAnswerRevealIndex = showAll ? parts.length + 1 : partIndex + 1;
      wpPrepareDirectImageZoom(detail);
    }

    // Delegation also handles the answer selector cloned into split-screen mode.
    document.addEventListener('click', wpChooseEssayAnswerPart, true);

    function wpToggleAnswerView(event = null) {
      // Khách chưa đăng nhập không được mở đáp án; chặn ngay cả ở chế độ chia đôi.
      if (typeof isGuestAccount === 'function' && isGuestAccount()) {
        if (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
        openLimitedUpgradeNotice('answer', 'guest');
        return;
      }
      // Tài khoản limited không được mở đáp án; chặn ngay cả ở chế độ chia đôi.
      if (typeof isLimitedAccount === 'function' && isLimitedAccount()) {
        if (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
        openLimitedUpgradeNotice('answer', 'limited');
        return;
      }
      if (wpState.busy || !wpState.questions.length) return;
      const question = wpState.questions[wpState.index];
      if (wpState.viewMode === 'single' && question && question.format === 'tf' && wpState.activeTfLetter) {
        if (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
        const message = 'Bạn đang chọn "Quét" cần dùng điện thoại quét thẻ, sau đó bấm "KQ quét"';
        wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(message)}</div>`);
        return;
      }
      wpResetRegionTool();
      if (wpState.viewMode === 'all') {
        wpNotify('Hãy bấm "Từng câu" để xem đáp án của từng câu.');
        return;
      }
      if (!question) return;

      if (wpState.answerVisible && wpQuestionHasSolution(question)) {
        wpOpenQuestionSolution(question);
        return;
      }

      if (!answerModal.hidden && !wpState.answerVisible) {
        wpCloseAnswerModal();
        return;
      }

      if (wpHasInvalidMultipleChoiceAnswer(question)) {
        /* Câu một lựa chọn có nhiều tín hiệu đáp án là câu không hợp lệ, nhưng
           vẫn phải cho giáo viên thấy đầy đủ những phương án đã được đánh dấu
           trong Word để dễ sửa lại tài liệu nguồn. Lần bấm tiếp theo sẽ ẩn các
           dấu tô đỏ giống cơ chế Xem/Ẩn đáp án thông thường. */
        if (wpState.answerVisible) {
          wpResetAnswerUi();
          return;
        }
        wpResetScanRevealUi();
        wpCloseAnswerModal();
        const highlighted = wpHighlightCorrectItems(question, true);
        /* Không phát âm thanh vì câu một lựa chọn đang có nhiều đáp án nguồn. */
        wpSetAnswerButtonActive(true);
        const message = wpInvalidMultipleChoiceAnswerMessage();
        wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(message)}</div>`);
        wpRequestFit();
        return;
      }

      if (question.format === 'tf') {
        if (!question.hasParsedAnswer) {
          wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(wpMissingAnswerMessage())}</div>`);
          return;
        }
        const rows = wpTfAnswerRows();
        if (!rows.length) {
          wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(wpMissingAnswerMessage())}</div>`);
          return;
        }
        if (wpState.answerVisible) {
          wpResetAnswerUi();
          return;
        }
        wpResetScanRevealUi();
        wpCloseAnswerModal();
        const highlighted = wpHighlightCorrectItems(question, true);
        if (highlighted) wpPlayManualFeedback(question);
        wpState.tfAnswerRevealIndex = rows.length;
        wpSetAnswerButtonActive(true);
        wpRequestFit();
        return;
      }

      if (question.format === 'essay' && Array.isArray(question.essayAnswerParts) && question.essayAnswerParts.length >= 2) {
        if (!question.hasDisplayableAnswer) {
          wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(wpMissingAnswerMessage())}</div>`);
          return;
        }
        if (wpState.answerVisible) {
          wpResetAnswerUi();
          return;
        }
        wpState.essayAnswerRevealIndex = 0;
        wpSetAnswerButtonActive(true);
        wpOpenAnswerModal('Đáp án', wpEssayAnswerChooserHtml(question));
        return;
      }

      if (question.format === 'mc') {
        if (!question.hasParsedAnswer) {
          wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(wpMissingAnswerMessage())}</div>`);
          return;
        }
        if (wpState.answerVisible) {
          wpResetAnswerUi();
          return;
        }
        wpCloseAnswerModal();
        const highlighted = wpHighlightCorrectItems(question, true);
        if (highlighted) wpPlayManualFeedback(question);
        wpSetAnswerButtonActive(true);
        return;
      }

      if (!question.hasDisplayableAnswer) {
        wpOpenAnswerModal('Thông báo', `<div class="word-presentation-answer-empty">${wpEscape(wpMissingAnswerMessage())}</div>`);
        return;
      }
      const title = String(question.answerLabel || (question.format === 'short' ? 'Trả lời' : 'Đáp án')).trim() || 'Đáp án';
      wpOpenAnswerModal(title, wpRichParagraphs(question.answerText || '', { firstInline:false }));
    }

    function wpValidLiveEntries() {
      if (typeof state === 'undefined') return [];
      return Object.entries(state.currentLiveAnswers || {}).filter(([, row]) => {
        const ans = String(row && row.ans || '').trim().toUpperCase();
        return ['A', 'B', 'C', 'D'].includes(ans);
      });
    }

    function wpSetScanStatus(text, tone = '') {
      // Keep actionable statuses, but omit passive ready/presentation labels.
      const raw = String(text || '');
      const hideReady = (wpState.documentMode !== 'ordinary' || wpOrdinaryState.kind === 'pptx-slide')
        && raw === 'Sẵn sàng quét thẻ';
      const label = ['Câu này chỉ trình chiếu', 'Chọn Lớp-Môn'].includes(raw) || hideReady ? '' : raw;
      scanStatusEl.textContent = label;
      scanStatusEl.className = `word-presentation-scan-status${tone ? ` ${tone}` : ''}`;
      scanStatusEl.title = label;
    }

    function wpUpdateTfScanRows() {
      const question = wpCurrentQuestion();
      if (!question || question.format !== 'tf' || wpState.viewMode !== 'single') return;
      const savedMarks = (question.scanSavedMarks && typeof question.scanSavedMarks === 'object') ? question.scanSavedMarks : {};
      const closedItems = (question.scanClosedItems && typeof question.scanClosedItems === 'object') ? question.scanClosedItems : {};
      const manualMarks = wpManualTfMarkMap(question);
      if (wpState.activeTfLetter && (savedMarks[wpState.activeTfLetter] || closedItems[wpState.activeTfLetter])) {
        wpState.activeTfLetter = '';
      }
      const answered = wpValidLiveEntries().length;
      card.querySelectorAll('.word-presentation-item[data-letter]').forEach((row) => {
        const letter = String(row.getAttribute('data-letter') || '').trim().toLowerCase();
        const saved = String(savedMarks[letter] || '');
        const finished = !!saved || !!closedItems[letter];
        const active = !finished && !wpState.scanPreviewed && !!letter && letter === wpState.activeTfLetter;
        row.classList.toggle('is-scan-target', active);
        row.classList.toggle('is-scan-finished', finished);
        row.classList.remove('has-scan-result', 'has-result-mark');
        const button = row.querySelector('[data-word-tf-scan]');
        if (finished && button) {
          button.remove();
          row.classList.remove('has-scan-control');
        } else if (button) {
          button.textContent = active
            ? (wpState.repickPending ? 'Chọn Đ/S' : `Đang quét${answered ? ` (${answered})` : ''}`)
            : 'Quét';
          button.disabled = !wpState.scanAuthorized || wpState.scanPreviewed;
        }
        row.querySelectorAll('.word-presentation-tf-saved-mark, .word-presentation-tf-result-mark').forEach((mark) => mark.remove());
        const scanMark = wpTfScanResultMark(question, letter);
        wpSyncTfChoice(row, scanMark || manualMarks[letter] || '', !!scanMark);
      });
    }

    function wpUpdateScanUi() {
      const authorized = wpScanningAuthorized();
      wpState.scanAuthorized = authorized;
      scanTools.hidden = false;
      resultBtn.hidden = false;
      presenter.classList.toggle('wp-scan-authorized', authorized);
      if (!authorized) {
        const mode = window.mvipLimitedAccess && typeof window.mvipLimitedAccess.accountMode === 'function'
          ? window.mvipLimitedAccess.accountMode()
          : 'guest';
        resultBtn.disabled = false;
        resultBtn.textContent = 'KQ quét';
        resultBtn.classList.remove('is-previewed');
        wpSetScanStatus(mode === 'limited' ? 'Nâng cấp MVIP để quét thẻ' : 'Đăng nhập để quét thẻ', 'is-waiting');
        return;
      }

      const mon = (typeof state !== 'undefined') ? String(state.currentMon || '') : '';
      if (classSelect.value !== mon) classSelect.value = mon;
      const question = wpCurrentQuestion();
      const answered = wpValidLiveEntries().length;
      let canView = false;
      let status = 'Chọn Lớp-Môn';
      let tone = 'is-waiting';

      if (!mon) {
        status = 'Chọn Lớp-Môn';
      } else if (wpState.viewMode === 'all') {
        status = 'Chuyển về từng câu';
      } else if (wpIsUnscoredScanSlide(question)) {
        status = answered ? `${answered} học sinh đã quét` : 'Sẵn sàng quét thẻ';
        tone = answered ? 'is-ready' : '';
      } else if (!question) {
        status = 'Chưa có câu hỏi';
      } else if (wpState.repickPending) {
        status = question.format === 'tf'
          ? `Ý ${wpState.activeTfLetter} · A/B/C = S, D = Đ`
          : 'Chọn lại đáp án A/B/C/D';
      } else if (question.format === 'mc') {
        canView = answered > 0 && !wpState.scanPreviewed;
        if (question.scanSavedRecord && !answered) {
          status = `Đã lưu Câu ${wpQuestionDisplayNumber(question)}`;
          tone = 'is-saved';
        } else {
          status = answered ? `${answered} học sinh đã quét` : 'Sẵn sàng quét thẻ';
          tone = answered ? 'is-ready' : '';
        }
      } else if (question.format === 'tf') {
        if (wpState.repickPending) {
          status = `Ý ${wpState.activeTfLetter} · A/B/C = S, D = Đ`;
          tone = 'is-waiting';
          canView = false;
        } else if (!wpState.activeTfLetter) {
          status = 'Bấm Quét ở đầu một ý';
        } else {
          status = `Ý ${wpState.activeTfLetter} · ${answered} học sinh`;
          tone = answered ? 'is-ready' : 'is-waiting';
          canView = answered > 0 && !wpState.scanPreviewed;
        }
      } else {
        status = 'Câu này chỉ trình chiếu';
      }

      resultBtn.disabled = !canView;
      resultBtn.textContent = wpState.scanPreviewed ? 'Đã xem' : 'KQ quét';
      resultBtn.classList.toggle('is-previewed', wpState.scanPreviewed);
      wpSetScanStatus(status, tone);
      wpUpdateTfScanRows();
      wpSyncScanSplitPanelText();
    }

    function wpClearLiveScan(keepTfTarget = false) {
      wpResetScanRevealUi();
      if (typeof state !== 'undefined' && state.pendingResult && state.pendingResult.wordPresentation
        && typeof closeResultDialog === 'function') {
        closeResultDialog();
      }
      if (typeof clearCurrentQuestion === 'function') clearCurrentQuestion();
      else if (typeof state !== 'undefined') {
        state.currentLiveAnswers = {};
        state.questionFrozen = false;
      }
      wpState.scanPreviewed = false;
      wpState.repickPending = null;
      if (!keepTfTarget) wpState.activeTfLetter = '';
      wpUpdateScanUi();
    }

    function wpSelectClass(monValue) {
      if (!wpScanningAuthorized() || typeof state === 'undefined') return;
      const mon = typeof normMonKey === 'function' ? normMonKey(monValue || '') : String(monValue || '').trim();
      state.currentMon = mon;
      if (typeof els !== 'undefined') {
        if (els.classSubjectSelect) els.classSubjectSelect.value = mon;
        if (els.compactClassSubjectSelect) els.compactClassSubjectSelect.value = mon;
      }
      if (typeof buildCurrentRoster === 'function') buildCurrentRoster();
      else state.currentLiveAnswers = {};
      if (typeof setAccountNote === 'function') setAccountNote();
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpState.activeTfLetter = '';
      wpState.scanPreviewed = false;
      wpUpdateScanUi();
      wpSyncScanSplitPanelText();
    }

    function wpBeginTfScan(letterValue) {
      const question = wpCurrentQuestion();
      const letter = String(letterValue || '').trim().toLowerCase();
      if (!wpScanningAuthorized()) {
        if (window.mvipLimitedAccess) window.mvipLimitedAccess.guard('feature');
        return;
      }
      if (!question || question.format !== 'tf' || !letter) return;
      const savedMarks = (question.scanSavedMarks && typeof question.scanSavedMarks === 'object') ? question.scanSavedMarks : {};
      const closedItems = (question.scanClosedItems && typeof question.scanClosedItems === 'object') ? question.scanClosedItems : {};
      if (savedMarks[letter] || closedItems[letter]) return;
      if (typeof state === 'undefined' || !state.currentMon) {
        wpNotify('Bạn chọn lớp - môn ở trên trước khi quét thẻ');
        try {
          const target = (typeof els !== 'undefined' && (els.compactClassSubjectSelect || els.classSubjectSelect)) || null;
          if (target) target.focus();
        } catch (_) {}
        return;
      }
      if (question.scanResultMarks) delete question.scanResultMarks[letter];
      wpResetRegionTool();
      wpResetAnswerUi();
      wpState.activeTfLetter = letter;
      wpClearLiveScan(true);
      wpState.activeTfLetter = letter;
      wpUpdateScanUi();
      if (typeof showLoginStatus === 'function') {
        showLoginStatus(`Đang nhận kết quả quét cho Câu ${wpQuestionDisplayNumber(question)}${letter}.`, 'ok');
      }
    }

    function wpHandleScanMessage(msg) {
      if (!wordPresentationIsOpen() || !wpScanningAuthorized() || wpState.viewMode !== 'single') return false;
      const question = wpCurrentQuestion();
      // Ordinary documents and non-quiz lesson slides receive cards on the
      // student board. Quiz slides retain their own MC/TF scoring rules.
      const unscoredSlide = wpIsUnscoredScanSlide(question);
      if (!unscoredSlide && (!question || !['mc', 'tf'].includes(question.format))) return false;
      if (!unscoredSlide && question.format === 'tf' && !wpState.activeTfLetter) return false;
      if (typeof state === 'undefined' || !state.currentMon || state.questionFrozen) return false;

      const meta = (msg && msg.meta && typeof msg.meta === 'object') ? msg.meta : {};
      let mon = String(meta.mon || meta.class_subject || meta.lop_mon || meta.lopmon || '').trim();
      const lop = String(meta.lop || '').trim();
      if (mon && lop && !mon.includes(lop)) mon = `${mon}-${lop}`;
      mon = typeof normMonKey === 'function' ? normMonKey(mon) : mon;
      if (!mon || mon !== state.currentMon) return false;

      const soKey = typeof resolveStudentKey === 'function'
        ? resolveStudentKey(state.currentStudents || {}, meta.so)
        : String(meta.so || '').trim();
      const ans = String(meta.ans || '').trim().toUpperCase();
      if (!soKey || !['A', 'B', 'C', 'D'].includes(ans)) return false;
      if (state.currentDroppedStudents && state.currentDroppedStudents[soKey]) return false;
      if (state.currentLiveAnswers && state.currentLiveAnswers[soKey]) return false;

      if (!state.currentLiveAnswers || typeof state.currentLiveAnswers !== 'object') state.currentLiveAnswers = {};
      state.currentLiveAnswers[soKey] = {
        ans,
        ts: meta.ts || meta.time || new Date().toLocaleTimeString('vi-VN', { hour12: false })
      };
      scheduleLiveScanUi(soKey);
      return true;
    }

    function wpPreviewScanResult() {
      if (!wpScanningAuthorized()) {
        if (window.mvipLimitedAccess) window.mvipLimitedAccess.guard('feature');
        return;
      }
      if (typeof state === 'undefined' || !state.currentMon) {
        wpNotify('Bạn chọn Lớp-Môn trước khi xem kết quả.');
        return;
      }
      const question = wpCurrentQuestion();
      if (!question || !['mc', 'tf'].includes(question.format)) {
        wpNotify('Câu trả lời ngắn và tự luận chỉ dùng để trình chiếu.');
        return;
      }
      if (wpHasInvalidMultipleChoiceAnswer(question)) {
        /* Không chấm điểm câu một lựa chọn có nhiều đáp án, nhưng vẫn tô đỏ
           toàn bộ phương án được nhận diện để người dùng thấy nguyên nhân lỗi. */
        wpResetRegionTool();
        wpResetAnswerUi();
        wpResetScanRevealUi();
        const wanted = new Set((question.correctLetters || [])
          .map((value) => String(value || '').trim().toUpperCase())
          .filter((value) => /^[A-D]$/.test(value)));
        card.querySelectorAll('.word-presentation-item[data-letter]').forEach((row) => {
          const letter = String(row.getAttribute('data-letter') || '').trim().toUpperCase();
          row.classList.toggle('is-scan-correct-answer', wanted.has(letter));
          row.classList.toggle('is-scan-answer-error', wanted.has(letter));
        });
        wpRequestFit();
        wpNotify(wpInvalidMultipleChoiceAnswerMessage());
        return;
      }
      const liveEntries = wpValidLiveEntries();
      if (!liveEntries.length) {
        wpNotify('Chưa có học sinh trả lời câu hoặc ý đang quét.');
        return;
      }
      if (!question.hasParsedAnswer) {
        wpNotify(wpMissingAnswerMessage());
        return;
      }

      let correctToken = '';
      let correctLabel = '';
      let correctCnt = 0;
      let sub = '';
      if (question.format === 'mc') {
        const wanted = new Set((question.correctLetters || []).map((value) => String(value || '').trim().toUpperCase()).filter(Boolean));
        correctToken = Array.from(wanted)[0] || '';
        correctLabel = Array.from(wanted).join(', ');
        if (!correctToken) {
          wpNotify(wpMissingAnswerMessage());
          return;
        }
        correctCnt = liveEntries.reduce((sum, [, row]) => sum + (wanted.has(String(row && row.ans || '').toUpperCase()) ? 1 : 0), 0);
      } else {
        sub = String(wpState.activeTfLetter || '').trim().toLowerCase();
        if (!sub) {
          wpNotify('Bạn bấm nút Quét ở đầu một ý trước.');
          return;
        }
        const correctSet = new Set((question.correctLetters || []).map((value) => String(value || '').trim().toLowerCase()));
        const isTrue = correctSet.has(sub);
        correctToken = isTrue ? 'D' : 'A';
        correctLabel = isTrue ? 'Đ' : 'S';
        correctCnt = liveEntries.reduce((sum, [, row]) => {
          const ans = String(row && row.ans || '').toUpperCase();
          const right = typeof isCorrectAnswerForScoreItem === 'function'
            ? isCorrectAnswerForScoreItem(ans, correctToken, { type: 'true_false' })
            : ((ans === 'D') === isTrue);
          return sum + (right ? 1 : 0);
        }, 0);
      }

      wpResetRegionTool();
      wpResetAnswerUi();
      wpResetScanRevealUi();
      if (question.format === 'mc') {
        const wanted = new Set((question.correctLetters || []).map((value) => String(value || '').trim().toUpperCase()).filter(Boolean));
        card.querySelectorAll('.word-presentation-item[data-letter]').forEach((row) => {
          const letter = String(row.getAttribute('data-letter') || '').trim().toUpperCase();
          row.classList.toggle('is-scan-correct-answer', wanted.has(letter));
        });
      } else {
        wpSetTfScanResult(question, sub, correctLabel);
      }
      wpState.scanPreviewed = true;
      /* Đồng bộ với cách chấm bình thường của Kiểm tra ngay: đáp án giơ trên thẻ
         được hiện sau tên học sinh, đúng màu xanh và sai màu đỏ. */
      state.revealAnswers = true;
      state.selectedCorrect = correctToken;
      state.examPreviewDone = false;
      state.questionFrozen = true;
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpUpdateScanUi();
      wpSyncScanSplitPanelText();
      if (typeof showResultDialog !== 'function') {
        wpNotify(`Đáp án đúng: ${correctLabel}. Tỷ lệ đúng: ${correctCnt}/${liveEntries.length}.`);
        return;
      }
      showResultDialog(correctToken, correctCnt, liveEntries.length, {
        wordPresentation: true,
        correctLabel,
        wordPresentationUid: wpState.fileUid,
        wordQuestionIndex: wpState.index + 1,
        wordQuestionNumber: wpQuestionDisplayNumber(question, wpState.index + 1),
        wordQuestionFormat: question.format,
        wordSub: sub,
        wordCorrectLetters: Array.isArray(question.correctLetters) ? question.correctLetters.slice() : [],
        allowRepick: true,
      });
    }


    function wpRepickPendingResult(pending) {
      if (!pending || !pending.wordPresentation) return false;
      const format = String(pending.wordQuestionFormat || '').trim().toLowerCase();
      const sub = String(pending.wordSub || '').trim().toLowerCase();
      if (!['mc', 'tf'].includes(format) || (format === 'tf' && !sub)) return false;

      const questionIndex = Math.max(1, parseInt(String(pending.wordQuestionIndex || wpState.index + 1), 10) || 1);
      const question = wpState.questions[questionIndex - 1] || wpCurrentQuestion();
      if (!question || question.format !== format || questionIndex !== wpState.index + 1
        || (pending.wordPresentationUid && pending.wordPresentationUid !== wpState.fileUid)) return false;

      wpResetScanRevealUi();
      wpState.repickPending = Object.assign({}, pending, {
        wordPresentation: true,
        wordQuestionIndex: questionIndex,
        wordQuestionFormat: format,
        wordSub: sub,
        wordScanMon: state.currentMon,
        allowRepick: true,
      });
      wpState.activeTfLetter = sub;
      wpState.scanPreviewed = true;

      if (typeof closeResultDialog === 'function') closeResultDialog();
      if (typeof state !== 'undefined') {
        state.revealAnswers = true;
        state.selectedCorrect = '';
        state.questionFrozen = true;
      }
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpUpdateScanUi();
      wpSyncScanSplitPanelText();
      if (typeof showLoginStatus === 'function') {
        showLoginStatus(format === 'tf'
          ? `Chọn A, B hoặc C để đặt kết quả đúng là S; chọn D để đặt kết quả đúng là Đ cho Câu ${wpQuestionDisplayNumber(question)}${sub}.`
          : `Chọn A, B, C hoặc D để đổi đáp án đúng cho Câu ${wpQuestionDisplayNumber(question)}.`, 'info');
      }
      return true;
    }

    function wpAbortRepickPendingResult() {
      if (!wpState.repickPending) return false;
      wpResetScanRevealUi();
      wpState.repickPending = null;
      wpState.scanPreviewed = false;
      if (typeof state !== 'undefined') {
        state.revealAnswers = false;
        state.selectedCorrect = '';
        state.questionFrozen = false;
      }
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpUpdateScanUi();
      wpSyncScanSplitPanelText();
      return true;
    }

    function wpHandleRepickChoice(choiceValue) {
      const pending = wpState.repickPending;
      if (!pending) return false;

      const choice = String(choiceValue || '').trim().toUpperCase();
      if (!['A', 'B', 'C', 'D'].includes(choice)) return true;
      const questionIndex = Math.max(1, parseInt(String(pending.wordQuestionIndex || wpState.index + 1), 10) || 1);
      const question = wpState.questions[questionIndex - 1] || wpCurrentQuestion();
      const sub = String(pending.wordSub || wpState.activeTfLetter || '').trim().toLowerCase();
      const format = String(pending.wordQuestionFormat || '').trim().toLowerCase();
      const isTf = format === 'tf';
      if (!question || !['mc', 'tf'].includes(format) || question.format !== format || (isTf && !sub)
        || questionIndex !== wpState.index + 1
        || (pending.wordScanMon && pending.wordScanMon !== state.currentMon)
        || (pending.wordPresentationUid && pending.wordPresentationUid !== wpState.fileUid)) {
        wpAbortRepickPendingResult();
        wpNotify('Không xác định được câu hoặc ý đang chọn lại.');
        return true;
      }

      const liveEntries = wpValidLiveEntries();
      if (!liveEntries.length) {
        wpAbortRepickPendingResult();
        wpNotify('Kết quả quét của ý này không còn dữ liệu để chấm.');
        return true;
      }

      /* Theo quy ước thẻ hiện có: A/B/C đều biểu thị S, D biểu thị Đ.
         Lưu token chuẩn A hoặc D để các phép chấm và dữ liệu máy chủ nhất quán,
         nhưng bảng kết quả luôn hiện chữ S hoặc Đ cho giáo viên. */
      const expected = isTf ? (choice === 'D' ? 'D' : 'A') : choice;
      const correctLabel = isTf ? (choice === 'D' ? 'Đ' : 'S') : choice;
      const correctCnt = liveEntries.reduce((sum, [, row]) => {
        const ans = String(row && row.ans || '').trim().toUpperCase();
        const right = typeof isCorrectAnswerForScoreItem === 'function'
          ? isCorrectAnswerForScoreItem(ans, expected, { type: isTf ? 'true_false' : 'single' })
          : (isTf ? ((ans === 'D') === (expected === 'D')) : ans === expected);
        return sum + (right ? 1 : 0);
      }, 0);

      const nextPending = Object.assign({}, pending, {
        correct: expected,
        correctLabel,
        wordPresentation: true,
        wordQuestionIndex: questionIndex,
        wordQuestionFormat: format,
        wordSub: sub,
        wordCorrectLetters: isTf ? pending.wordCorrectLetters : [expected],
        allowRepick: true,
      });

      wpState.activeTfLetter = sub;
      wpState.scanPreviewed = true;
      wpResetScanRevealUi();
      wpState.repickPending = null;
      if (isTf) wpSetTfScanResult(question, sub, correctLabel);
      else card.querySelectorAll('.word-presentation-item[data-letter]').forEach((row) => {
        row.classList.toggle('is-scan-correct-answer', String(row.dataset.letter || '').toUpperCase() === expected);
      });
      if (typeof state !== 'undefined') {
        state.revealAnswers = true;
        state.selectedCorrect = expected;
        state.questionFrozen = true;
      }
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpUpdateScanUi();
      wpSyncScanSplitPanelText();

      if (typeof showResultDialog === 'function') {
        showResultDialog(expected, correctCnt, liveEntries.length, nextPending);
      } else {
        wpNotify(`Đáp án đúng: ${correctLabel}. Tỷ lệ đúng: ${correctCnt}/${liveEntries.length}.`);
      }
      wpState.repickPending = null;
      return true;
    }

    function wpNormalHistoryCount(history) {
      return (Array.isArray(history) ? history : []).reduce((count, item) => {
        if (typeof isMultiCodeRecord === 'function' && isMultiCodeRecord(item)) return count;
        return count + 1;
      }, 0);
    }

    async function wpSavePendingResult(pending) {
      if (!pending || !pending.wordPresentation) return;
      if (!wpScanningAuthorized() || typeof state === 'undefined' || !state.token) throw new Error('Tài khoản chưa được phép lưu kết quả quét.');
      const mon = typeof normMonKey === 'function' ? normMonKey(state.currentMon || '') : String(state.currentMon || '').trim();
      if (!mon) throw new Error('Chưa chọn Lớp-Môn.');
      const questionIndex = Math.max(1, parseInt(String(pending.wordQuestionIndex || wpState.index + 1), 10) || 1);
      const question = wpState.questions[questionIndex - 1] || wpCurrentQuestion();
      if (!question) throw new Error('Không tìm thấy câu hỏi cần lưu.');
      const format = String(pending.wordQuestionFormat || question.format || 'mc');
      const sub = String(pending.wordSub || '').trim().toLowerCase();
      const expected = String(pending.correct || '').trim().toUpperCase();
      const rawAnswers = {};
      const answers = {};
      let answered = 0;
      let correctCnt = 0;

      Object.entries(state.currentLiveAnswers || {}).forEach(([so, row]) => {
        const raw = String(row && row.ans || '').trim().toUpperCase();
        if (!['A', 'B', 'C', 'D'].includes(raw)) return;
        rawAnswers[String(so)] = raw;
        let stored = raw;
        let right = raw === expected;
        if (format === 'tf') {
          const logical = typeof trueFalseCardDisplayValue === 'function'
            ? trueFalseCardDisplayValue(raw)
            : (raw === 'D' ? 'Đ' : 'S');
          stored = logical === 'Đ' ? 'D' : 'A';
          right = typeof isCorrectAnswerForScoreItem === 'function'
            ? isCorrectAnswerForScoreItem(raw, expected, { type: 'true_false' })
            : stored === expected;
        } else if (Array.isArray(pending.wordCorrectLetters) && pending.wordCorrectLetters.length) {
          const wanted = new Set(pending.wordCorrectLetters.map((value) => String(value || '').trim().toUpperCase()));
          right = wanted.has(raw);
        }
        answers[String(so)] = stored;
        answered += 1;
        if (right) correctCnt += 1;
      });
      if (!answered) throw new Error('Chưa có học sinh trả lời.');

      const history = Array.isArray(state.scanHistory[mon]) ? [...state.scanHistory[mon]] : [];
      const uid = String(pending.wordPresentationUid || wpState.fileUid || '').trim();
      const existingIndex = history.findIndex((item) => {
        if (String(item && item.mode || '') !== 'word_presentation') return false;
        if (String(item && item.word_presentation_uid || '').trim() !== uid) return false;
        if (Number(item && item.word_question_index || 0) !== questionIndex) return false;
        return String(item && item.word_sub || '').trim().toLowerCase() === sub;
      });
      const existingQ = existingIndex >= 0 ? (parseInt(String(history[existingIndex] && history[existingIndex].q || 0), 10) || 0) : 0;
      const qNo = existingQ > 0 ? existingQ : wpNormalHistoryCount(history) + 1;
      const tsIso = new Date().toISOString().slice(0, 19);
      const qLabel = `${wpQuestionDisplayNumber(question, questionIndex)}${sub}`;
      const record = {
        q: qNo,
        q_label: qLabel,
        ts: tsIso,
        date: tsIso.split('T')[0],
        correct: expected,
        correct_label: String(pending.correctLabel || expected),
        answered,
        correct_cnt: correctCnt,
        answers,
        raw_answers: rawAnswers,
        mode: 'word_presentation',
        word_presentation_uid: uid,
        word_file_name: String(wpState.fileName || ''),
        word_question_index: questionIndex,
        word_question_number: wpQuestionDisplayNumber(question, questionIndex),
        word_question_format: format,
        word_sub: sub,
      };
      if (existingIndex >= 0) history[existingIndex] = record;
      else history.push(record);
      state.scanHistory[mon] = history;
      if (typeof apiPut !== 'function') throw new Error('Không tìm thấy chức năng cập nhật máy chủ.');
      await apiPut('/api/scan-history', { data: state.scanHistory });

      if (format === 'tf' && sub) {
        if (!question.scanSavedMarks || typeof question.scanSavedMarks !== 'object') question.scanSavedMarks = {};
        if (!question.scanClosedItems || typeof question.scanClosedItems !== 'object') question.scanClosedItems = {};
        question.scanSavedMarks[sub] = String(pending.correctLabel || (expected === 'D' ? 'Đ' : 'S'));
        wpSetTfScanResult(question, sub, question.scanSavedMarks[sub]);
        question.scanClosedItems[sub] = true;
      } else {
        question.scanSavedRecord = { qNo, savedAt: tsIso };
      }

      if (typeof closeResultDialog === 'function') closeResultDialog();
      if (typeof clearCurrentQuestion === 'function') clearCurrentQuestion();
      wpResetScanRevealUi();
      wpState.scanPreviewed = false;
      wpState.repickPending = null;
      wpState.activeTfLetter = '';
      if (typeof renderCurrentBoard === 'function') renderCurrentBoard();
      if (typeof renderHistory === 'function') renderHistory();
      if (typeof updateTopStats === 'function') updateTopStats();
      if (typeof updateViewResultsButton === 'function') updateViewResultsButton();
      wpRenderQuestion(questionIndex - 1);
      if (typeof showLoginStatus === 'function') {
        const displayNumber = wpQuestionDisplayNumber(question, questionIndex);
        const label = format === 'tf' && sub ? `Câu ${displayNumber}${sub}` : `Câu ${displayNumber}`;
        showLoginStatus(`Đã lưu kết quả ${label} của ${mon} lên máy chủ.`, 'ok');
      }
    }

    function wpCancelPendingResult(pending) {
      const questionIndex = Math.max(1, parseInt(String(pending && pending.wordQuestionIndex || wpState.index + 1), 10) || 1);
      const question = wpState.questions[questionIndex - 1] || wpCurrentQuestion();
      const sub = String(pending && pending.wordSub || wpState.activeTfLetter || '').trim().toLowerCase();
      if (question && question.format === 'tf' && sub) {
        if (!question.scanClosedItems || typeof question.scanClosedItems !== 'object') question.scanClosedItems = {};
        question.scanClosedItems[sub] = true;
      }
      if (typeof closeResultDialog === 'function') closeResultDialog();
      if (typeof clearCurrentQuestion === 'function') clearCurrentQuestion();
      else if (typeof state !== 'undefined') {
        state.currentLiveAnswers = {};
        state.questionFrozen = false;
      }
      wpResetScanRevealUi();
      wpState.scanPreviewed = false;
      wpState.repickPending = null;
      wpState.activeTfLetter = '';
      wpUpdateScanUi();
    }

    function wpRegionState() {
      if (!wpState.regionTool || typeof wpState.regionTool !== 'object') {
        wpState.regionTool = { selecting: false, zoomed: false, dragActive: false, pointerId: null, startX: 0, startY: 0 };
      }
      return wpState.regionTool;
    }

    function wpUpdateRegionButton() {
      const tool = wpRegionState();
      const disabled = presenter.hidden || wpState.busy || wpState.viewMode === 'all' || card.classList.contains('is-loading');
      regionBtn.disabled = disabled;
      regionBtn.classList.toggle('is-selecting', !!tool.selecting);
      regionBtn.classList.toggle('is-zoomed', !!tool.zoomed);
      regionBtn.textContent = tool.zoomed ? 'Thu nhỏ vùng' : (tool.selecting ? 'Hủy quét' : 'Quét vùng');
      regionBtn.title = tool.zoomed ? 'Trở lại toàn bộ câu hỏi' : (tool.selecting ? 'Hủy chọn vùng' : 'Kéo chuột để chọn vùng cần phóng to');
    }

    function wpResetRegionTool() {
      const tool = wpRegionState();
      viewport.classList.remove('word-presentation-region-selecting');
      viewport.querySelectorAll('.word-presentation-region-overlay, .word-presentation-region-zoom-pane').forEach((element) => {
        try { element.remove(); } catch (_) {}
      });
      fitLayer.classList.remove('word-presentation-region-base-hidden');
      tool.selecting = false;
      tool.zoomed = false;
      tool.dragActive = false;
      tool.pointerId = null;
      tool.startX = 0;
      tool.startY = 0;
      wpUpdateRegionButton();
    }

    function wpRegionSelectionRect(startX, startY, endX, endY) {
      const left = Math.max(0, Math.min(startX, endX));
      const top = Math.max(0, Math.min(startY, endY));
      const right = Math.min(viewport.clientWidth, Math.max(startX, endX));
      const bottom = Math.min(viewport.clientHeight, Math.max(startY, endY));
      return { left, top, width: Math.max(0, right - left), height: Math.max(0, bottom - top) };
    }

    function wpPinOrdinaryLayerToViewport(element) {
      cv7991PinRegionLayerToViewport(element, viewport);
    }

    function wpCopyRegionCanvasPixels(sourceRoot, cloneRoot) {
      if (!(sourceRoot instanceof Element) || !(cloneRoot instanceof Element)) return;
      const sources = Array.from(sourceRoot.querySelectorAll('canvas'));
      const clones = Array.from(cloneRoot.querySelectorAll('canvas'));
      sources.forEach((source, index) => {
        const clone = clones[index];
        if (!(source instanceof HTMLCanvasElement) || !(clone instanceof HTMLCanvasElement)) return;
        try {
          clone.width = source.width;
          clone.height = source.height;
          const context = clone.getContext('2d');
          if (context) context.drawImage(source, 0, 0);
        } catch (_) {}
      });
    }

    function wpApplyRegionZoom(selection) {
      const tool = wpRegionState();
      viewport.querySelectorAll('.word-presentation-region-overlay').forEach((element) => element.remove());
      viewport.classList.remove('word-presentation-region-selecting');
      if (!selection || selection.width < 24 || selection.height < 24) {
        wpResetRegionTool();
        return;
      }
      cv7991CreateRegionZoomPane(viewport, fitLayer, selection);
      fitLayer.classList.add('word-presentation-region-base-hidden');
      tool.selecting = false;
      tool.zoomed = true;
      tool.dragActive = false;
      tool.pointerId = null;
      wpUpdateRegionButton();
    }

    function wpStartRegionSelection() {
      const tool = wpRegionState();
      if (regionBtn.disabled) return;
      if (tool.zoomed || tool.selecting) {
        wpResetRegionTool();
        return;
      }
      wpCloseAnswerModal();
      const overlay = document.createElement('div');
      overlay.className = 'word-presentation-region-overlay';
      wpPinOrdinaryLayerToViewport(overlay);
      const box = document.createElement('div');
      box.className = 'word-presentation-region-selection-box';
      overlay.appendChild(box);
      viewport.appendChild(overlay);
      viewport.classList.add('word-presentation-region-selecting');
      tool.selecting = true;
      wpUpdateRegionButton();

      const point = (event) => cv7991RegionPointerPoint(event, overlay);
      const draw = (endX, endY) => {
        const selection = wpRegionSelectionRect(tool.startX, tool.startY, endX, endY);
        box.style.display = 'block';
        box.style.left = `${selection.left}px`;
        box.style.top = `${selection.top}px`;
        box.style.width = `${selection.width}px`;
        box.style.height = `${selection.height}px`;
        return selection;
      };
      overlay.addEventListener('pointerdown', (event) => {
        if (event.button !== 0) return;
        event.preventDefault();
        const p = point(event);
        tool.dragActive = true;
        tool.pointerId = event.pointerId;
        tool.startX = p.x;
        tool.startY = p.y;
        try { overlay.setPointerCapture(event.pointerId); } catch (_) {}
        draw(p.x, p.y);
      });
      overlay.addEventListener('pointermove', (event) => {
        if (!tool.dragActive || tool.pointerId !== event.pointerId) return;
        const p = point(event);
        draw(p.x, p.y);
      });
      const finish = (event) => {
        if (!tool.dragActive || tool.pointerId !== event.pointerId) return;
        event.preventDefault();
        const p = point(event);
        const selection = draw(p.x, p.y);
        tool.dragActive = false;
        try { overlay.releasePointerCapture(event.pointerId); } catch (_) {}
        wpApplyRegionZoom(selection);
      };
      overlay.addEventListener('pointerup', finish);
      overlay.addEventListener('pointercancel', () => wpResetRegionTool());
    }

    function wpToggleRegionTool() {
      const tool = wpRegionState();
      if (tool.zoomed || tool.selecting) wpResetRegionTool();
      else wpStartRegionSelection();
    }

    function wpIsPresentationFormulaMedia(element) {
      if (!(element instanceof Element)) return false;
      return element.classList.contains('single-exam-inline-formula')
        || !!element.closest('.single-exam-inline-formula');
    }

    function wpIsPresentationTableMedia(element) {
      if (!(element instanceof Element)) return false;
      return element.matches('table, .single-exam-inline-table')
        || !!element.querySelector('table, .single-exam-inline-table');
    }

    function wpOrderPresentationMediaByWord(elements) {
      return Array.from(elements || []).filter((element) => element instanceof Element);
    }

    function wpSourceMediaElements(root) {
      if (!(root instanceof Element)) return [];
      return Array.from(root.querySelectorAll(
        '.single-exam-inline-media:not(.single-exam-inline-formula), '
        + '.single-exam-inline-vector:not(.single-exam-inline-formula), '
        + '.single-exam-inline-table, canvas'
      )).filter((element) => {
        if (!(element instanceof Element)) return false;
        if (wpIsPresentationFormulaMedia(element)) return false;
        return true;
      }).filter((element, index, list) => !list.some((other, otherIndex) =>
        otherIndex < index && other.contains(element)
      ));
    }

    function wpScaleSourceMediaWithText(elements) {
      const fallbackSourceFontPx = 16;
      Array.from(elements || []).forEach((element) => {
        if (!(element instanceof HTMLElement)) return;
        if (wpIsPresentationTableMedia(element)) return;
        const wordCharacterPt = parseFloat(element.style.getPropertyValue('--cv-word-character-height-pt')) || 0;
        const sourceFontPx = element.classList.contains('cv7991-word-small-flow-image') && wordCharacterPt > 0
          ? wordCharacterPt * 96 / 72
          : fallbackSourceFontPx;
        let baseWidth = Number(element.dataset.cv7991WordBaseWidthPx) || 0;
        let baseHeight = Number(element.dataset.cv7991WordBaseHeightPx) || 0;
        if (!(baseWidth > 0)) {
          baseWidth = parseFloat(element.style.getPropertyValue('--cv-presenter-base-width'))
            || parseFloat(element.style.width) || 0;
          if (baseWidth > 0) element.dataset.cv7991WordBaseWidthPx = String(baseWidth);
        }
        if (!(baseHeight > 0)) {
          baseHeight = parseFloat(element.style.getPropertyValue('--cv-presenter-base-height'))
            || parseFloat(element.style.height) || 0;
          if (baseHeight > 0) element.dataset.cv7991WordBaseHeightPx = String(baseHeight);
        }
        if (baseWidth > 0) element.style.width = `${Math.round(baseWidth / sourceFontPx * 100000) / 100000}em`;
        if (baseHeight > 0) element.style.height = `${Math.round(baseHeight / sourceFontPx * 100000) / 100000}em`;
      });
    }

    function wpCleanQuestionPromptAfterMovingMedia(prompt) {
      if (!(prompt instanceof Element)) return;
      const removable = Array.from(prompt.querySelectorAll('.single-exam-rich, span, div, p')).reverse();
      removable.forEach((element) => {
        if (!(element instanceof Element)) return;
        if (element.matches('.word-presentation-question-label')) return;
        const hasVisual = !!element.querySelector('img,svg,canvas,table,math,.single-exam-inline-vector,.single-exam-inline-formula');
        const textValue = String(element.textContent || '').replace(/\u00a0/g, ' ').trim();
        // Ảnh/bảng đã được chuyển sang panel bên phải; vỏ chỉ còn <br> phải bị xóa
        // để không để lại một hàng trắng đúng tại vị trí cũ của phương tiện.
        if (!hasVisual && !textValue) {
          try { element.remove(); } catch (_) {}
        }
      });
      const isBlankText = (node) => node && node.nodeType === Node.TEXT_NODE
        && !String(node.nodeValue || '').replace(/\u00a0/g, ' ').trim();
      Array.from(prompt.querySelectorAll('br')).forEach((br) => {
        let previous = br.previousSibling;
        while (isBlankText(previous)) {
          const current = previous;
          previous = previous.previousSibling;
          try { current.remove(); } catch (_) {}
        }
        if (previous && previous.nodeType === Node.ELEMENT_NODE && previous.tagName === 'BR') {
          try { br.remove(); } catch (_) {}
        }
      });
      while (prompt.firstChild && (isBlankText(prompt.firstChild) || (prompt.firstChild.nodeType === Node.ELEMENT_NODE && prompt.firstChild.tagName === 'BR'))) {
        prompt.removeChild(prompt.firstChild);
      }
      while (prompt.lastChild && (isBlankText(prompt.lastChild) || (prompt.lastChild.nodeType === Node.ELEMENT_NODE && prompt.lastChild.tagName === 'BR'))) {
        prompt.removeChild(prompt.lastChild);
      }
    }

    function wpTableContainsNonFormulaFigure(element) {
      if (!(element instanceof Element)) return false;
      return Array.from(element.querySelectorAll(
        'img, canvas, svg, .single-exam-inline-vector, .single-exam-inline-media'
      )).some((visual) => visual instanceof Element && !visual.closest('.single-exam-inline-formula'));
    }

    function wpKeepHorizontalTableAtSource(element) {
      if (!(element instanceof Element) || !wpIsPresentationTableMedia(element)) return false;
      if (wpTableContainsNonFormulaFigure(element)) return false;
      const table = element.matches('table, .single-exam-inline-table')
        ? element : element.querySelector('table, .single-exam-inline-table');
      if (!(table instanceof Element)) return false;
      const size = wpTableVisualSize(table);
      const rows = Math.max(0, Number(table.rows && table.rows.length) || table.querySelectorAll('tr').length || 0);
      const columns = Array.from(table.querySelectorAll('tr')).reduce((max, row) => {
        const count = Array.from(row.children || []).reduce((sum, cell) => {
          return sum + Math.max(1, parseInt(String(cell && cell.getAttribute && cell.getAttribute('colspan') || '1'), 10) || 1);
        }, 0);
        return Math.max(max, count);
      }, 0);
      const horizontal = size.width > 0 && size.height > 0
        ? size.width > size.height * 1.05
        : columns > rows;
      if (!horizontal) return false;
      table.classList.add('cv7991-source-horizontal-table');
      if (element !== table) element.classList.add('cv7991-source-horizontal-table-host');
      return true;
    }

    function wpPresentationMediaCandidates(questionLine, allowOneSmallNdtcImage = false) {
      if (!(questionLine instanceof Element)) return [];
      const candidates = wpSourceMediaElements(questionLine).filter((element) => {
        /* Hình DrawingML/nhóm hình của Word được dựng thành
           .single-exam-word-group-figure. Trước đây các phần tử này bị loại khỏi
           vùng phương tiện nên câu tự luận có sơ đồ chung chỉ còn khoảng trống.
           Giữ cả khung vector ngoài và loại riêng SVG con để không nhân đôi. */
        if (element.tagName === 'SVG' && element.closest('.single-exam-inline-vector')) return false;
        /* Ảnh nhỏ giữ nguyên tại token; chỉ ảnh lớn mới là ứng viên của panel. */
        if (element.classList.contains('cv7991-word-small-flow-image') && !allowOneSmallNdtcImage) return false;
        return true;
      }).filter((element, index, list) => !list.some((other, otherIndex) => otherIndex < index && other.contains(element)));
      const hasMultipleWordMedia = candidates.length >= 2;
      return candidates.filter((element) => {
        /* Chỉ giữ bảng ngang tại nguồn khi nó là đối tượng duy nhất. Với câu có
           từ 2 ảnh/bảng/biểu đồ, mọi đối tượng cùng vào panel theo thứ tự Word. */
        if (!hasMultipleWordMedia && wpIsPresentationTableMedia(element)
          && wpKeepHorizontalTableAtSource(element)) return false;
        return true;
      });
    }

    function wpTableVisualSize(tableElement) {
      if (!(tableElement instanceof Element)) return { width: 0, height: 0, area: 0 };
      const table = tableElement.matches('table') ? tableElement : tableElement.querySelector('table');
      const visual = tableElement.getBoundingClientRect ? tableElement : table;
      const rect = visual && visual.getBoundingClientRect ? visual.getBoundingClientRect() : null;
      let width = Number(rect && rect.width) || Number(visual && (visual.scrollWidth || visual.offsetWidth || visual.clientWidth)) || 0;
      let height = Number(rect && rect.height) || Number(visual && (visual.scrollHeight || visual.offsetHeight || visual.clientHeight)) || 0;
      if (table) {
        width = Math.max(width, Number(table.scrollWidth || table.offsetWidth || table.clientWidth) || 0);
        height = Math.max(height, Number(table.scrollHeight || table.offsetHeight || table.clientHeight) || 0);
      }
      return { width, height, area: Math.max(0, width) * Math.max(0, height) };
    }

    function wpRefreshPresentationMediaLayout(question, token) {
      if (token !== wpState.mediaLayoutToken || wpState.viewMode !== 'single') return;
      const shell = card.querySelector('.word-presentation-content-shell');
      const panel = card.querySelector('.word-presentation-media-panel');
      if (!(shell instanceof Element) || !(panel instanceof Element) || panel.hidden) return;

      const children = Array.from(panel.children).filter((child) => child instanceof Element);

      if (card.classList.contains('cv7991-ndtc-stacked-media')) {
        card.classList.remove(
          'media-layout-figure', 'media-layout-mixed',
          'media-layout-table-horizontal', 'media-layout-table-vertical',
          'cv7991-bottom-right-media-flow'
        );
        panel.classList.toggle('is-multiple-media', children.length > 1);
        if (typeof cv7991ResetBottomRightMediaOptionFlow === 'function') {
          cv7991ResetBottomRightMediaOptionFlow(card);
        }
        wpRequestFit();
        return;
      }

      const tableChildren = children.filter(wpIsPresentationTableMedia);
      const imageChildren = children.filter((child) => !wpIsPresentationTableMedia(child));
      const tableContainsFigure = tableChildren.some((tableMedia) => Array.from(tableMedia.querySelectorAll(
        'img, canvas, svg, .single-exam-inline-vector, .single-exam-inline-media'
      )).some((visual) => !visual.closest('.single-exam-inline-formula')));
      card.classList.toggle('cv7991-pure-data-table',
        tableChildren.length > 0 && imageChildren.length === 0 && !tableContainsFigure);
      panel.classList.toggle('is-multiple-media', children.length > 1);

      // Dựa trên phương tiện đã dựng thật trong DOM: hễ có hình vẽ/biểu đồ ở bên phải
      // thì 4 phương án trắc nghiệm bên trái phải là 4 hàng, không còn bố cục 2 x 2.
      const optionItems = card.querySelector('.word-presentation-items');
      if (optionItems instanceof Element && children.length
        && question && ['mc', 'tf', 'essay', 'short'].includes(String(question.format || ''))) {
        optionItems.classList.remove('is-grid', 'is-four-columns');
        optionItems.classList.add('is-stacked');
        optionItems.dataset.forceSingleColumn = '1';
      }

      card.classList.remove(
        'media-layout-figure', 'media-layout-mixed',
        'media-layout-table-horizontal', 'media-layout-table-vertical'
      );

      if (imageChildren.length && tableChildren.length) {
        card.classList.add('media-layout-mixed');
      } else if (imageChildren.length) {
        card.classList.add('media-layout-figure');
      } else if (tableChildren.length) {
        const largest = tableChildren
          .map(wpTableVisualSize)
          .reduce((best, current) => current.area > best.area ? current : best, { width: 0, height: 0, area: 0 });
        // Phân loại theo kích thước thật đang vẽ trên màn hình như Kiểm tra ngay.
        // Bảng rộng hơn cao đặt ngang phía dưới; bảng cao đặt sang phải.
        const horizontal = largest.width > largest.height * 1.05;
        card.classList.add(horizontal ? 'media-layout-table-horizontal' : 'media-layout-table-vertical');
      }

      const optionText = Array.from(card.querySelectorAll('.word-presentation-item-content'))
        .map((element) => String(element.textContent || '').replace(/\s+/g, ' ').trim())
        .join(' ');
      const promptText = String(card.querySelector('.word-presentation-question-prompt')?.textContent || '')
        .replace(/\s+/g, ' ').trim();
      card.classList.toggle('media-needs-more-text', optionText.length > 180 || promptText.length > 260);
      cv7991LayoutMultipleQuestionMedia(card);
      wpRequestFit();
    }

    function wpPreparePresentationMediaLayout(question) {
      const token = ++wpState.mediaLayoutToken;
      if (card instanceof HTMLElement && typeof cv7991ResetBottomRightMediaOptionFlow === 'function') {
        cv7991ResetBottomRightMediaOptionFlow(card);
      }
      card.classList.remove(
        'has-presentation-media', 'media-layout-figure', 'media-layout-mixed',
        'cv7991-multiple-question-media', 'cv7991-ndtc-stacked-media', 'cv7991-ndtc-image-no-title',
        'media-layout-table-horizontal', 'media-layout-table-vertical',
        'media-without-items', 'media-needs-more-text', 'cv7991-pure-data-table',
        'cv7991-has-source-horizontal-table', 'cv7991-word-source-media-flow'
      );
      const shell = card.querySelector('.word-presentation-content-shell');
      const questionLine = card.querySelector('.word-presentation-question-line');
      const prompt = card.querySelector('.word-presentation-question-prompt');
      const panel = card.querySelector('.word-presentation-media-panel');
      const items = card.querySelector('.word-presentation-items');
      if (!(shell instanceof Element) || !(questionLine instanceof Element) || !(panel instanceof Element)) return token;
      if (cv7991PrepareSourceQuestionLayout(card)) return token;

      const sourceWordMedia = wpSourceMediaElements(card)
        .filter((element) => !element.closest('.word-presentation-media-panel'));
      const singleNdtcFigure = !!(question && question.isNdtc
        && sourceWordMedia.length === 1
        && !wpIsPresentationTableMedia(sourceWordMedia[0]));
      const smallFlowImages = sourceWordMedia.filter((element) =>
        element.classList.contains('cv7991-word-small-flow-image') && !singleNdtcFigure
      );
      if (smallFlowImages.length) {
        /* Ảnh nhỏ ở lại luồng; ảnh lớn vẫn tiếp tục xuống nhánh panel bản 34. */
        card.classList.add('cv7991-word-source-media-flow');
        wpScaleSourceMediaWithText(smallFlowImages);
        smallFlowImages.forEach((element) => {
          element.dataset.mvipMediaKind = 'inline-small-figure';
        });
      }

      /* Chỉ tách phương tiện chung nằm trong phần đề bài. Phương tiện hoặc
         công thức thuộc riêng một ý tự luận phải ở nguyên trong hàng a/b/c/d;
         nếu quét toàn bộ vỏ nội dung, các ý đặt trong bảng Word sẽ bị kéo sang
         cột phải và phá vỡ thứ tự “đề bài trước, các ý sau”. */
      const media = wpOrderPresentationMediaByWord(
        wpPresentationMediaCandidates(questionLine, singleNdtcFigure)
      );
      const sourceHorizontalTables = Array.from(questionLine.querySelectorAll(
        '.single-exam-inline-table.cv7991-source-horizontal-table'
      ));
      card.classList.toggle('cv7991-has-source-horizontal-table', sourceHorizontalTables.length > 0);
      if (!media.length) {
        panel.hidden = true;
        panel.innerHTML = '';
        return token;
      }

      const titleOnlyNdtc = media.length === 1
        && !wpIsPresentationTableMedia(media[0])
        && questionLine.classList.contains('is-ndtc-question-line')
        && !(items instanceof Element)
        && !String(prompt && prompt.textContent || '').replace(/\s+/g, '').trim();

      panel.hidden = false;
      panel.innerHTML = '';
      media.forEach((element) => {
        element.dataset.mvipMediaKind = wpIsPresentationTableMedia(element) ? 'table' : 'figure';
        try { panel.appendChild(element); } catch (_) {}
      });
      wpCleanQuestionPromptAfterMovingMedia(prompt);
      card.classList.add('has-presentation-media');
      card.classList.toggle('media-without-items', !(items instanceof Element));

      if (titleOnlyNdtc) {
        /* Không thêm media-layout-figure: class đó kích hoạt bố cục 2 cột cũ.
           Class riêng bên dưới dùng grid 1 cột: tiêu đề hàng 1, ảnh hàng 2. */
        card.classList.add('cv7991-ndtc-stacked-media');
        card.classList.toggle('cv7991-ndtc-image-no-title',
          !String(question && (question.ndtcTitleText || question.ndtcTitle) || '').trim());
        card.classList.remove(
          'media-layout-figure', 'media-layout-mixed',
          'media-layout-table-horizontal', 'media-layout-table-vertical',
          'cv7991-bottom-right-media-flow'
        );
        if (typeof cv7991ResetBottomRightMediaOptionFlow === 'function') {
          cv7991ResetBottomRightMediaOptionFlow(card);
        }
      }

      cv7991LayoutMultipleQuestionMedia(card);

      const refresh = () => {
        if (token !== wpState.mediaLayoutToken) return;
        wpRefreshPresentationMediaLayout(question, token);
      };
      requestAnimationFrame(() => requestAnimationFrame(refresh));
      Array.from(panel.querySelectorAll('img')).forEach((img) => {
        if (!img.complete || !img.naturalWidth) {
          img.addEventListener('load', refresh, { once: true });
          img.addEventListener('error', refresh, { once: true });
        }
      });
      return token;
    }

    function wpAllViewMediaAspectRatio(element) {
      if (!(element instanceof Element)) return 1;
      const img = element instanceof HTMLImageElement ? element : element.querySelector('img');
      if (img) {
        const naturalWidth = Number(img.naturalWidth || img.width || img.clientWidth) || 0;
        const naturalHeight = Number(img.naturalHeight || img.height || img.clientHeight) || 0;
        if (naturalWidth > 0 && naturalHeight > 0) return naturalWidth / naturalHeight;
      }
      const canvas = element instanceof HTMLCanvasElement ? element : element.querySelector('canvas');
      if (canvas) {
        const width = Number(canvas.width || canvas.clientWidth) || 0;
        const height = Number(canvas.height || canvas.clientHeight) || 0;
        if (width > 0 && height > 0) return width / height;
      }
      const svg = element.matches('svg') ? element : element.querySelector('svg');
      if (svg) {
        const viewBox = String(svg.getAttribute('viewBox') || '').trim().split(/[\s,]+/).map(Number);
        if (viewBox.length >= 4 && viewBox[2] > 0 && viewBox[3] > 0) return viewBox[2] / viewBox[3];
        const rect = svg.getBoundingClientRect ? svg.getBoundingClientRect() : null;
        if (rect && rect.width > 0 && rect.height > 0) return rect.width / rect.height;
      }
      const rect = element.getBoundingClientRect ? element.getBoundingClientRect() : null;
      if (rect && rect.width > 0 && rect.height > 0) return rect.width / rect.height;
      return 1;
    }

    function wpApplySingleViewMediaMetrics() {
      cv7991ApplyUnifiedSingleViewMediaMetrics(card, viewport, wpIsPresentationTableMedia);
    }

    function wpCancelAllViewProgressiveRender() {
      wpState.allViewRenderToken += 1;
      if (wpState.allViewObserver) {
        try { wpState.allViewObserver.disconnect(); } catch (_) {}
      }
      wpState.allViewObserver = null;
      if (wpState.allViewIdleHandle) {
        try {
          if (wpState.allViewIdleKind === 'idle' && typeof window.cancelIdleCallback === 'function') {
            window.cancelIdleCallback(wpState.allViewIdleHandle);
          } else {
            clearTimeout(wpState.allViewIdleHandle);
          }
        } catch (_) {}
      }
      wpState.allViewIdleHandle = 0;
      wpState.allViewIdleKind = '';
      wpState.allViewProcessQueue = [];
      wpState.allViewRenderedCount = 0;
      wpState.allViewTotalCount = 0;
      wpState.allViewLoadingEl = null;
      if (wpState.allViewLoadingRemovalTimer) clearTimeout(wpState.allViewLoadingRemovalTimer);
      wpState.allViewLoadingRemovalTimer = 0;
    }

    function wpApplyAllViewCanvasStyles() {
      if (!(viewport instanceof HTMLElement) || !(fitLayer instanceof HTMLElement) || !(card instanceof HTMLElement)) return;
      viewport.classList.remove('cv7991-vertical-scroll', 'cv7991-horizontal-scroll');
      ['overflow', 'overflow-x', 'overflow-y'].forEach((name) => viewport.style.removeProperty(name));
      viewport.style.setProperty('overflow', 'auto', 'important');

      fitLayer.classList.remove('cv7991-proportional-canvas');
      ['position', 'left', 'top', 'width', 'height', 'min-width', 'min-height', 'max-width',
        'max-height', 'margin', 'padding', 'display', 'overflow', 'transform', 'transform-origin'].forEach((name) => {
        fitLayer.style.removeProperty(name);
      });
      fitLayer.style.setProperty('position', 'static', 'important');
      fitLayer.style.setProperty('left', 'auto', 'important');
      fitLayer.style.setProperty('top', 'auto', 'important');
      fitLayer.style.setProperty('width', '100%', 'important');
      fitLayer.style.setProperty('height', 'auto', 'important');
      fitLayer.style.setProperty('min-width', '0px', 'important');
      fitLayer.style.setProperty('min-height', '100%', 'important');
      fitLayer.style.setProperty('max-width', 'none', 'important');
      fitLayer.style.setProperty('max-height', 'none', 'important');
      fitLayer.style.setProperty('margin', '0px', 'important');
      fitLayer.style.setProperty('padding', '0px', 'important');
      fitLayer.style.setProperty('display', 'block', 'important');
      fitLayer.style.setProperty('transform', 'none', 'important');
      fitLayer.style.setProperty('transform-origin', 'center top', 'important');
      fitLayer.dataset.scale = '1';
      delete fitLayer.dataset.cv7991LargeCanvas;

      ['position', 'left', 'top', 'width', 'min-width', 'max-width', 'height', 'min-height',
        'max-height', 'overflow', 'transform', 'transform-origin', 'font-size'].forEach((name) => {
        card.style.removeProperty(name);
      });
      const edge = (Number(viewport.clientWidth) || 0) <= 620 ? 16 : 24;
      card.style.setProperty('position', 'relative', 'important');
      card.style.setProperty('left', 'auto', 'important');
      card.style.setProperty('top', 'auto', 'important');
      card.style.setProperty('width', `calc(100% - ${edge}px)`, 'important');
      card.style.setProperty('min-width', '0px', 'important');
      card.style.setProperty('max-width', `calc(100% - ${edge}px)`, 'important');
      card.style.setProperty('height', 'auto', 'important');
      card.style.setProperty('min-height', '0px', 'important');
      card.style.setProperty('max-height', 'none', 'important');
      card.style.setProperty('overflow', 'visible', 'important');
      card.style.setProperty('transform', 'none', 'important');
      card.dataset.cv7991ViewportScale = '1';
    }

    function wpAllViewSectionIndex(section) {
      if (!(section instanceof Element)) return -1;
      const value = Number(section.getAttribute('data-question-index'));
      return Number.isInteger(value) && value >= 0 ? value : -1;
    }

    function wpPrepareAllViewQuestionMediaLayout(section, question) {
      if (!(section instanceof Element)) return;
      if (cv7991PrepareSourceQuestionLayout(section)) {
        cv7991FitSourceAllSection(section);
        return;
      }
      const shell = section.querySelector('.word-presentation-content-shell');
      const questionLine = section.querySelector('.word-presentation-question-line');
      const prompt = section.querySelector('.word-presentation-question-prompt');
      const panel = section.querySelector('.word-presentation-media-panel');
      const items = section.querySelector('.word-presentation-items');
      if (!(shell instanceof Element) || !(questionLine instanceof Element) || !(panel instanceof Element)) return;

      section.classList.remove('cv7991-word-source-media-flow');
      const sourceWordMedia = wpSourceMediaElements(section)
        .filter((element) => !element.closest('.word-presentation-media-panel'));
      const smallFlowImages = sourceWordMedia.filter((element) =>
        element.classList.contains('cv7991-word-small-flow-image')
      );
      if (smallFlowImages.length) {
        section.classList.add('cv7991-word-source-media-flow');
        wpScaleSourceMediaWithText(smallFlowImages);
        smallFlowImages.forEach((element) => {
          element.dataset.mvipMediaKind = 'inline-small-figure';
        });
      }

      const existingMedia = Array.from(panel.children).filter((element) => element instanceof Element);
      const media = wpOrderPresentationMediaByWord(existingMedia.length
        ? existingMedia
        : wpPresentationMediaCandidates(questionLine));
      if (!media.length) {
        section.classList.remove('wp-all-view-has-media', 'wp-all-view-media-without-items');
        panel.hidden = true;
        panel.innerHTML = '';
        return;
      }

      if (!existingMedia.length) {
        panel.hidden = false;
        panel.innerHTML = '';
        media.forEach((element) => {
          element.dataset.mvipMediaKind = wpIsPresentationTableMedia(element) ? 'table' : 'figure';
          try { panel.appendChild(element); } catch (_) {}
        });
        wpCleanQuestionPromptAfterMovingMedia(prompt);
      } else {
        panel.hidden = false;
        media.forEach((element) => {
          element.dataset.mvipMediaKind = wpIsPresentationTableMedia(element) ? 'table' : 'figure';
          try { panel.appendChild(element); } catch (_) {}
        });
      }
      section.classList.add('wp-all-view-has-media');
      section.classList.toggle('wp-all-view-media-without-items', !(items instanceof Element));
      panel.classList.toggle('is-multiple-media', media.length > 1);

      const vw = Math.max(
        Number(viewport && viewport.clientWidth) || 0,
        Number(window.innerWidth) || 0,
        Number(document.documentElement && document.documentElement.clientWidth) || 0
      );
      const vh = Math.max(
        Number(viewport && viewport.clientHeight) || 0,
        Number(window.innerHeight) || 0,
        Number(document.documentElement && document.documentElement.clientHeight) || 0
      );
      const shellWidth = Math.max(320,
        Math.floor(Number(shell.clientWidth || section.clientWidth || card.clientWidth || vw) || 320)
      );
      const maxWidthByScreen = Math.max(220, Math.floor(vw * 0.5));
      const maxWidthByShell = Math.max(220, Math.floor(shellWidth * 0.5));
      const maxHeightByScreen = Math.max(180, Math.floor(vh * (2 / 3)));
      const ratio = media
        .map(wpAllViewMediaAspectRatio)
        .find((value) => Number.isFinite(value) && value > 0.03 && value < 50) || 1;

      let panelWidth = Math.min(maxWidthByScreen, maxWidthByShell, Math.round(maxHeightByScreen * ratio));
      panelWidth = Math.max(160, panelWidth);
      let panelHeight = Math.max(120, Math.round(panelWidth / ratio));
      if (panelHeight > maxHeightByScreen) {
        panelHeight = maxHeightByScreen;
        panelWidth = Math.min(maxWidthByScreen, maxWidthByShell, Math.max(160, Math.round(panelHeight * ratio)));
      }
      section.style.setProperty('--wp-all-media-width', `${Math.round(panelWidth)}px`);
      section.style.setProperty('--wp-all-media-height', `${Math.round(panelHeight)}px`);

      cv7991LayoutMultipleQuestionMedia(section);

      Array.from(panel.querySelectorAll('img')).forEach((img) => {
        if (img.complete && img.naturalWidth > 0) return;
        if (img.dataset.wpAllViewLoadBound === '1') return;
        img.dataset.wpAllViewLoadBound = '1';
        const refresh = () => {
          delete img.dataset.wpAllViewLoadBound;
          if (wpState.viewMode !== 'all' || !section.isConnected) return;
          wpQueueAllViewSectionProcess(section, wpAllViewSectionIndex(section), true);
        };
        img.addEventListener('load', refresh, { once: true });
        img.addEventListener('error', refresh, { once: true });
      });
    }

    function wpProcessAllViewSection(section, index, force = false) {
      if (wpState.viewMode !== 'all' || !(section instanceof HTMLElement) || !section.isConnected) return;
      if (!force && section.dataset.wpAllPrepared === '1') return;
      section.dataset.wpAllPrepared = 'processing';
      const questionIndex = Number.isInteger(index) && index >= 0 ? index : wpAllViewSectionIndex(section);
      const question = wpState.questions[questionIndex] || null;
      try { wpPrepareAllViewQuestionMediaLayout(section, question); } catch (_) {}
      if (section.classList.contains('cv7991-source-question-layout')) {
        wpPrepareDirectImageZoom(section);
        cv7991FitSourceAllSection(section);
        section.dataset.wpAllPrepared = '1';
        delete section.dataset.wpAllQueued;
        return;
      }
      const allViewFontSize = parseFloat(getComputedStyle(card).fontSize) || 25;
      try { wpScaleInlineMathTypeFormulas(allViewFontSize, section); } catch (_) {}
      try { cv7991RefreshSingleLineOptionClasses(section); } catch (_) {}
      try { wpScaleInlineMathTypeFormulas(allViewFontSize, section); } catch (_) {}
      try { wpPrepareDirectImageZoom(section); } catch (_) {}
      cv7991LayoutMultipleQuestionMedia(section);
      section.dataset.wpAllPrepared = '1';
      delete section.dataset.wpAllQueued;

      Array.from(section.querySelectorAll('img.single-exam-inline-formula')).forEach((img) => {
        if (img.complete && img.naturalWidth > 0) return;
        if (img.dataset.wpAllFormulaLoadBound === '1') return;
        img.dataset.wpAllFormulaLoadBound = '1';
        const refresh = () => {
          delete img.dataset.wpAllFormulaLoadBound;
          if (wpState.viewMode !== 'all' || !section.isConnected) return;
          wpQueueAllViewSectionProcess(section, questionIndex, true);
        };
        img.addEventListener('load', refresh, { once: true });
        img.addEventListener('error', refresh, { once: true });
      });
    }

    function wpQueueAllViewSectionProcess(section, index, force = false) {
      if (wpState.viewMode !== 'all' || !(section instanceof HTMLElement) || !section.isConnected) return;
      if (!force && (section.dataset.wpAllPrepared === '1' || section.dataset.wpAllQueued === '1')) return;
      if (force) {
        const existing = wpState.allViewProcessQueue.find((entry) => entry && entry.section === section);
        if (existing) {
          existing.force = true;
          return;
        }
      }
      section.dataset.wpAllQueued = '1';
      wpState.allViewProcessQueue.push({ section, index, force: !!force });
      wpScheduleAllViewWork(wpState.allViewRenderToken);
    }

    function wpEnsureAllViewObserver(token) {
      if (wpState.allViewObserver || typeof IntersectionObserver !== 'function') return;
      wpState.allViewObserver = new IntersectionObserver((entries) => {
        if (token !== wpState.allViewRenderToken || wpState.viewMode !== 'all') return;
        entries.forEach((entry) => {
          if (!entry.isIntersecting) return;
          const section = entry.target;
          try { wpState.allViewObserver.unobserve(section); } catch (_) {}
          wpQueueAllViewSectionProcess(section, wpAllViewSectionIndex(section), false);
        });
      }, { root: viewport, rootMargin: '900px 0px', threshold: 0.01 });
    }

    function wpAppendAllViewQuestion(index, token) {
      if (token !== wpState.allViewRenderToken || wpState.viewMode !== 'all') return null;
      const documentRoot = card.querySelector('.word-presentation-all-document');
      if (!(documentRoot instanceof HTMLElement)) return null;
      const question = wpState.questions[index];
      if (!question) return null;
      const holder = document.createElement('div');
      holder.innerHTML = `<section class="word-presentation-all-question" data-question-index="${index}" data-wp-all-prepared="0" id="wordPresentationAllQuestion${index + 1}">${wpQuestionInnerHtml(question)}</section>`;
      const section = holder.firstElementChild;
      if (!(section instanceof HTMLElement)) return null;
      const titleTrigger = section.querySelector('.word-presentation-question-label');
      if (titleTrigger instanceof HTMLElement) {
        titleTrigger.setAttribute('data-word-open-question-index', String(index));
        titleTrigger.setAttribute('role', 'button');
        titleTrigger.setAttribute('tabindex', '0');
        titleTrigger.setAttribute('aria-label', `Trình chiếu riêng ${String(question.label || `câu ${index + 1}`).replace(/[.:]+\s*$/, '')}`);
        titleTrigger.title = 'Bấm để chuyển sang Từng câu tại câu này';
      }
      documentRoot.appendChild(section);
      wpState.allViewRenderedCount = Math.max(wpState.allViewRenderedCount, index + 1);

      if (wpState.allViewObserver) {
        try { wpState.allViewObserver.observe(section); } catch (_) {}
      } else {
        wpQueueAllViewSectionProcess(section, index, false);
      }
      if (index < 2) wpQueueAllViewSectionProcess(section, index, false);
      return section;
    }

    function wpUpdateAllViewLoadingStatus() {
      const total = Math.max(0, Number(wpState.allViewTotalCount) || wpState.questions.length || 0);
      const rendered = Math.min(total, Math.max(0, Number(wpState.allViewRenderedCount) || 0));
      const loading = wpState.allViewLoadingEl;
      if (loading instanceof HTMLElement && loading.isConnected) {
        loading.textContent = rendered < total
          ? `Đang hiển thị ${rendered}/${total} câu…`
          : `Đã hiển thị ${total}/${total} câu`;
      }
      if (progressEl) progressEl.textContent = rendered < total
        ? `Toàn bộ ${rendered}/${total} câu`
        : `Toàn bộ ${total} câu`;
      if (rendered >= total && loading instanceof HTMLElement && loading.isConnected
        && !wpState.allViewLoadingRemovalTimer) {
        wpState.allViewLoadingRemovalTimer = setTimeout(() => {
          wpState.allViewLoadingRemovalTimer = 0;
          if (wpState.viewMode === 'all' && loading.isConnected) loading.remove();
          if (wpState.allViewLoadingEl === loading) wpState.allViewLoadingEl = null;
        }, 450);
      }
    }

    function wpScheduleAllViewWork(token) {
      if (token !== wpState.allViewRenderToken || wpState.viewMode !== 'all' || wpState.allViewIdleHandle) return;
      const run = (deadline) => {
        wpState.allViewIdleHandle = 0;
        wpState.allViewIdleKind = '';
        if (token !== wpState.allViewRenderToken || wpState.viewMode !== 'all') return;
        const hasTime = () => !deadline || deadline.didTimeout
          || typeof deadline.timeRemaining !== 'function' || deadline.timeRemaining() > 5;

        // Chỉ căn một câu trong mỗi lượt rảnh; đây là phần tốn nhiều phép đo MathType nhất.
        if (wpState.allViewProcessQueue.length && hasTime()) {
          const entry = wpState.allViewProcessQueue.shift();
          if (entry && entry.section instanceof HTMLElement) {
            wpProcessAllViewSection(entry.section, entry.index, entry.force);
          }
        }

        // Dựng tối đa hai câu trong mỗi lượt để trình duyệt luôn có thời gian vẽ và nhận thao tác.
        let appended = 0;
        while (wpState.allViewRenderedCount < wpState.allViewTotalCount && appended < 2 && hasTime()) {
          const index = wpState.allViewRenderedCount;
          if (!wpAppendAllViewQuestion(index, token)) break;
          appended += 1;
        }
        wpUpdateAllViewLoadingStatus();

        if (wpState.allViewRenderedCount < wpState.allViewTotalCount || wpState.allViewProcessQueue.length) {
          wpScheduleAllViewWork(token);
        }
      };

      if (typeof window.requestIdleCallback === 'function') {
        wpState.allViewIdleKind = 'idle';
        wpState.allViewIdleHandle = window.requestIdleCallback(run, { timeout: 120 });
      } else {
        wpState.allViewIdleKind = 'timeout';
        wpState.allViewIdleHandle = setTimeout(() => run({ didTimeout: true, timeRemaining: () => 8 }), 16);
      }
    }

    function wpQueueAllViewVisibleSections() {
      if (wpState.viewMode !== 'all' || !(viewport instanceof HTMLElement)) return;
      const viewportRect = viewport.getBoundingClientRect();
      const margin = Math.max(500, viewportRect.height * 1.25);
      Array.from(card.querySelectorAll('.word-presentation-all-question')).forEach((section) => {
        if (!(section instanceof HTMLElement) || section.dataset.wpAllPrepared === '1') return;
        const rect = section.getBoundingClientRect();
        if (rect.bottom >= viewportRect.top - margin && rect.top <= viewportRect.bottom + margin) {
          wpQueueAllViewSectionProcess(section, wpAllViewSectionIndex(section), false);
        }
      });
    }

    function wpPrepareAllViewMediaLayouts() {
      if (wpState.viewMode !== 'all' || !(card instanceof Element)) return;
      wpApplyAllViewCanvasStyles();
      wpQueueAllViewVisibleSections();
      card.querySelectorAll('.word-presentation-all-question.cv7991-source-question-layout').forEach(cv7991FitSourceAllSection);
    }

    function wpAttachMediaFitListeners(question, token) {
      card.querySelectorAll('img').forEach((img) => {
        if (img.complete && img.naturalWidth > 0) return;
        const refresh = () => {
          if (token !== wpState.mediaLayoutToken) return;
          wpRefreshPresentationMediaLayout(question, token);
          wpRequestFit();
        };
        img.addEventListener('load', refresh, { once: true });
        img.addEventListener('error', refresh, { once: true });
      });
    }

    function wpRenderQuestion(index) {
      if (!wpState.questions.length) return;
      const previousIndex = wpState.index;
      const previousViewMode = wpState.viewMode;
      wpCloseImageZoom();
      wpApplyHttcBadge(null);
      wpResetRegionTool();
      wpClearLiveScan(false);
      wpState.index = Math.max(0, Math.min(wpState.questions.length - 1, Number(index) || 0));
      const question = wpState.questions[wpState.index];
      const density = wpQuestionDensity(question);
      wpSetViewMode('single');
      wpResetAdaptiveSizing();
      card.className = `word-presentation-card${density ? ` ${density}` : ''}`;
      card.innerHTML = wpQuestionInnerHtml(question);

      if (titleEl) titleEl.textContent = wpState.fileName ? `Trình chiếu Word · ${wpState.fileName}` : 'Trình chiếu Word';
      if (progressEl) progressEl.textContent = `Câu ${wpState.index + 1}/${wpState.questions.length}`;
      if (typeEl) typeEl.textContent = wpTypeName(question.format);
      if (prevBtn) prevBtn.disabled = wpState.index <= 0;
      if (nextBtn) nextBtn.disabled = wpState.index >= wpState.questions.length - 1;
      wpResetAnswerUi();
      wpApplyHttcBadge(question);
      answerBtn.disabled = false;
      allBtn.disabled = false;
      jumpInput.disabled = false;
      jumpBtn.disabled = false;
      chooseQuestionBtn.disabled = false;
      wpSyncJumpInput(question);
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;
      const mediaToken = wpPreparePresentationMediaLayout(question);
      wpAttachMediaFitListeners(question, mediaToken);
      wpPrepareDirectImageZoom(card);
      wpRefreshAccess();
      wpUpdateScanUi();
      wpUpdateRegionButton();
      wpRequestFit();
      if (wordPresentationIsFullscreen()
        && (wpState.index !== previousIndex || previousViewMode !== 'single')) {
        wpRestartCountdownAfterQuestionChange();
      }
    }

    function wpRenderAllQuestions() {
      if (!wpState.questions.length || wpState.busy) return;
      wpStopCountdown(true);
      wpCloseImageZoom();
      wpResetRegionTool();
      wpClearLiveScan(false);
      wpState.mediaLayoutToken += 1;
      wpClearFitTimers();
      wpCancelAllViewProgressiveRender();
      wpSetViewMode('all');
      wpResetAdaptiveSizing();
      card.className = 'word-presentation-card is-all-view';
      wpApplyAllViewCanvasStyles();

      const token = wpState.allViewRenderToken;
      wpState.allViewRenderedCount = 0;
      wpState.allViewTotalCount = wpState.questions.length;
      wpState.allViewProcessQueue = [];
      card.innerHTML = '<div class="word-presentation-all-document"><div class="word-presentation-all-loading" role="status" aria-live="polite">Đang hiển thị 0/'
        + wpState.questions.length + ' câu…</div></div>';
      wpState.allViewLoadingEl = card.querySelector('.word-presentation-all-loading');
      wpEnsureAllViewObserver(token);

      // Dựng câu đầu ngay để màn hình không trắng, phần còn lại được thêm theo từng đợt rảnh.
      wpAppendAllViewQuestion(0, token);
      wpUpdateAllViewLoadingStatus();

      if (titleEl) titleEl.textContent = wpState.fileName ? `Trình chiếu Word · ${wpState.fileName}` : 'Trình chiếu Word';
      if (typeEl) typeEl.textContent = 'Tất cả';
      if (prevBtn) prevBtn.disabled = true;
      if (nextBtn) nextBtn.disabled = true;
      wpResetAnswerUi();
      wpApplyHttcBadge(null);
      answerBtn.disabled = true;
      allBtn.disabled = false;
      jumpInput.disabled = false;
      jumpBtn.disabled = false;
      chooseQuestionBtn.disabled = false;
      wpRefreshAccess();
      wpUpdateScanUi();
      wpUpdateRegionButton();
      fitLayer.dataset.scale = '1';
      viewport.scrollTop = 0;
      viewport.scrollLeft = 0;

      requestAnimationFrame(() => {
        if (token !== wpState.allViewRenderToken || wpState.viewMode !== 'all') return;
        wpApplyAllViewCanvasStyles();
        wpQueueAllViewVisibleSections();
        wpScheduleAllViewWork(token);
        viewport.scrollTop = 0;
        viewport.scrollLeft = 0;
      });
    }

    function wpFindQuestionIndex(value) {
      const raw = String(value == null ? '' : value).trim().replace(',', '.');
      if (!/^\d+(?:\.\d+)?$/.test(raw)) return -1;

      const exactDisplay = wpState.questions.findIndex((question) => wpQuestionDisplayNumber(question) === raw);
      if (exactDisplay >= 0) return exactDisplay;

      if (!/^\d+$/.test(raw)) return -1;
      const numeric = Number(raw);
      if (!Number.isSafeInteger(numeric) || numeric < 1) return -1;
      const exactSource = wpState.questions.findIndex((question) => String(question && (question.sourceNumber || question.number) || '').trim() === raw);
      if (exactSource >= 0) return exactSource;
      const ordinal = numeric - 1;
      return ordinal >= 0 && ordinal < wpState.questions.length ? ordinal : -1;
    }

    function wpJumpToQuestion() {
      if (wpState.busy || !wpState.questions.length) return false;
      const raw = String(jumpInput.value || '').trim();
      const targetIndex = wpFindQuestionIndex(raw);
      if (targetIndex < 0) {
        wpNotify(raw ? `Không tìm thấy câu số ${raw} trong file Word. File hiện có ${wpState.questions.length} câu đã nhận diện.` : 'Bạn nhập số câu cần trình chiếu.');
        jumpInput.focus();
        try { jumpInput.select(); } catch (_) {}
        return false;
      }
      wpRenderQuestion(targetIndex);
      try { jumpInput.blur(); } catch (_) {}
      try { jumpBtn.focus({ preventScroll: true }); } catch (_) {}
      return true;
    }

    function wpShowLoading(fileName) {
      wpStopCountdown(true);
      if (typeof window.mvipCollapsePresentationInkDock === 'function') {
        window.mvipCollapsePresentationInkDock('wordPresentationSideInkDock');
      }
      wpSetScanSplit(false);
      wpResetRegionTool();
      wpClearLiveScan(false);
      wpState.mediaLayoutToken += 1;
      presenter.hidden = false;
      presenter.setAttribute('aria-hidden', 'false');
      document.documentElement.classList.add('word-presentation-open');
      document.body.classList.add('word-presentation-open');
      wpSetViewMode('single');
      wpResetAnswerUi();
      wpApplyHttcBadge(null);
      answerBtn.disabled = true;
      allBtn.disabled = true;
      jumpInput.disabled = true;
      jumpInput.value = '';
      jumpBtn.disabled = true;
      chooseQuestionBtn.disabled = true;
      wpCloseQuestionPicker(false);
      wpResetAdaptiveSizing();
      card.className = 'word-presentation-card is-loading';
      card.innerHTML = `<div>${WP_PRESENTATION_LOADING_TEXT}</div>`;
      if (titleEl) titleEl.textContent = fileName ? `Trình chiếu Word · ${fileName}` : 'Trình chiếu Word';
      if (progressEl) progressEl.textContent = WP_PRESENTATION_LOADING_TEXT;
      if (typeEl) typeEl.textContent = 'Word';
      if (prevBtn) prevBtn.disabled = true;
      if (nextBtn) nextBtn.disabled = true;
      wpRefreshAccess();
      wpUpdateRegionButton();
      wpSetScanSplit(true);
      wpRequestFit();
    }

    let wpCountdownTimer = null;
    let wpCountdownEndAt = 0;
    let wpCountdownInitialSeconds = 0;
    let wpCountdownLastTickSecond = null;
    let wpCountdownAudioContext = null;
    let wpWheelAnswerCountdownActive = false;
    let wpWheelAnswerPreviousValue = '';

    function wpFormatCountdown(seconds) {
      const value = Math.max(0, Math.floor(Number(seconds) || 0));
      return `${value}s`;
    }

    function wpRemoveCountdownLiveOption() {
      const liveOption = countdownInput.querySelector('option[data-countdown-live="1"]');
      if (liveOption) liveOption.remove();
    }

    function wpShowCountdownLiveValue(seconds) {
      const value = Math.max(0, Math.floor(Number(seconds) || 0));
      let liveOption = countdownInput.querySelector('option[data-countdown-live="1"]');
      if (!liveOption) {
        liveOption = document.createElement('option');
        liveOption.dataset.countdownLive = '1';
        countdownInput.appendChild(liveOption);
      }
      liveOption.value = `countdown-${value}`;
      liveOption.textContent = wpFormatCountdown(value);
      countdownInput.value = liveOption.value;
    }

    function wpPrepareCountdownAudio() {
      const AudioContextClass = window.AudioContext || window.webkitAudioContext;
      if (!AudioContextClass) return null;
      try {
        if (!wpCountdownAudioContext || wpCountdownAudioContext.state === 'closed') {
          wpCountdownAudioContext = new AudioContextClass();
        }
        if (wpCountdownAudioContext.state !== 'running') {
          const resumeResult = wpCountdownAudioContext.resume();
          if (resumeResult && typeof resumeResult.catch === 'function') resumeResult.catch(() => {});
        }
        return wpCountdownAudioContext;
      } catch (_) {
        return null;
      }
    }

    function wpPlayCountdownTick() {
      const audioContext = wpPrepareCountdownAudio();
      if (!audioContext) return;
      try {
        const startAt = audioContext.currentTime + 0.01;
        const oscillator = audioContext.createOscillator();
        const gain = audioContext.createGain();
        oscillator.type = 'square';
        oscillator.frequency.setValueAtTime(1180, startAt);
        gain.gain.setValueAtTime(0.0001, startAt);
        gain.gain.exponentialRampToValueAtTime(0.19, startAt + 0.006);
        gain.gain.exponentialRampToValueAtTime(0.0001, startAt + 0.075);
        oscillator.connect(gain);
        gain.connect(audioContext.destination);
        oscillator.start(startAt);
        oscillator.stop(startAt + 0.085);
      } catch (_) {}
    }

    function wpPlayFinishBell() {
      if (typeof playSingleExamFinishBell === 'function') {
        try { playSingleExamFinishBell(); return; } catch (_) {}
      }
      const audioContext = wpPrepareCountdownAudio();
      if (!audioContext) return;
      try {
        const startAt = audioContext.currentTime + 0.02;
        [784, 1175, 1568].forEach((frequency, index) => {
          const oscillator = audioContext.createOscillator();
          const gain = audioContext.createGain();
          oscillator.type = 'sine';
          oscillator.frequency.setValueAtTime(frequency, startAt);
          gain.gain.setValueAtTime(0.0001, startAt);
          gain.gain.exponentialRampToValueAtTime(0.22 / (index + 1), startAt + 0.012);
          gain.gain.exponentialRampToValueAtTime(0.0001, startAt + 0.9 - index * 0.12);
          oscillator.connect(gain);
          gain.connect(audioContext.destination);
          oscillator.start(startAt);
          oscillator.stop(startAt + 1);
        });
      } catch (_) {}
    }

    function wpReadCountdownSeconds() {
      const rawText = String(countdownInput.value || '').trim();
      if (!rawText) return 0;
      const rawValue = Number(rawText);
      if (!Number.isFinite(rawValue) || rawValue <= 0) {
        countdownInput.value = '';
        return 0;
      }
      return Math.floor(rawValue);
    }

    function wpStopCountdown(restoreInitial = true) {
      if (wpCountdownTimer !== null) {
        window.clearInterval(wpCountdownTimer);
        wpCountdownTimer = null;
      }
      const initialSeconds = wpCountdownInitialSeconds;
      wpCountdownEndAt = 0;
      wpCountdownInitialSeconds = 0;
      wpCountdownLastTickSecond = null;
      countdownInput.disabled = false;
      countdownInput.classList.remove('is-running');
      wpRemoveCountdownLiveOption();
      countdownInput.setAttribute('aria-label', 'Số giây đếm ngược của Trình chiếu Word');
      if (restoreInitial && initialSeconds > 0) countdownInput.value = String(initialSeconds);
      wpWheelAnswerCountdownActive = false;
      wpWheelAnswerPreviousValue = '';
    }

    function wpFinishCountdown() {
      if (wpCountdownTimer !== null) {
        window.clearInterval(wpCountdownTimer);
        wpCountdownTimer = null;
      }
      wpCountdownEndAt = 0;
      wpShowCountdownLiveValue(0);
      countdownInput.setAttribute('aria-label', 'Còn 0 giây');

      const wheelAnswerCountdown = wpWheelAnswerCountdownActive;
      const previousValue = wpWheelAnswerPreviousValue;
      wpPlayFinishBell();

      if (wheelAnswerCountdown) {
        wpStopCountdown(false);
        countdownInput.value = previousValue || '';
        document.dispatchEvent(new CustomEvent('mvip-magic-wheel-answer-countdown-finished', {
          detail:{ source:'word' }
        }));
        return;
      }

      // Đồng hồ CHÍNH trên thanh công cụ: giữ nguyên hành vi cũ,
      // đồng thời báo cho Vòng quay may mắn biết nó đã về 0.
      wpStopCountdown(true);
      document.dispatchEvent(new CustomEvent('mvip-magic-wheel-main-countdown-finished', {
        detail:{ source:'word' }
      }));
    }

    function wpStartCountdown(seconds) {
      wpStopCountdown(false);
      if (!Number.isFinite(seconds) || seconds <= 0) return;
      wpCountdownInitialSeconds = Math.floor(seconds);
      wpCountdownLastTickSecond = null;
      wpCountdownEndAt = Date.now() + (wpCountdownInitialSeconds * 1000);
      countdownInput.disabled = false;
      countdownInput.classList.add('is-running');

      const tick = () => {
        if (!wpCountdownEndAt) return;
        const remaining = Math.max(0, Math.ceil((wpCountdownEndAt - Date.now()) / 1000));
        const nextValue = `countdown-${remaining}`;
        if (countdownInput.value !== nextValue) {
          wpShowCountdownLiveValue(remaining);
          countdownInput.setAttribute('aria-label', `Còn ${remaining} giây`);
        }
        if (remaining >= 1 && remaining <= 5 && wpCountdownLastTickSecond !== remaining) {
          wpCountdownLastTickSecond = remaining;
          wpPlayCountdownTick();
        }
        if (remaining <= 0) wpFinishCountdown();
      };

      tick();
      wpCountdownTimer = window.setInterval(tick, 200);
    }

    window.mvipMagicWheelCountdownHooks = window.mvipMagicWheelCountdownHooks || {};
    window.mvipMagicWheelCountdownHooks.word = {
      start(seconds = 5) {
        const duration = Math.max(1, Math.floor(Number(seconds) || 5));
        const currentValue = String(countdownInput.value || '');
        const previousValue = currentValue.startsWith('countdown-') ? '' : currentValue;
        wpPrepareCountdownAudio();
        wpStartCountdown(duration);
        if (!wpCountdownEndAt) return false;
        wpWheelAnswerPreviousValue = previousValue;
        wpWheelAnswerCountdownActive = true;
        return true;
      }
    };

    function wpRestartCountdownAfterQuestionChange() {
      if (!wordPresentationIsFullscreen()) return;
      const seconds = wpCountdownInitialSeconds > 0 ? wpCountdownInitialSeconds : wpReadCountdownSeconds();
      if (!Number.isFinite(seconds) || seconds <= 0) return;
      wpPrepareCountdownAudio();
      wpStartCountdown(seconds);
    }

    function wpFullscreenElement() {
      return document.fullscreenElement || document.webkitFullscreenElement || null;
    }

    function wordPresentationIsOpen() {
      return !presenter.hidden;
    }

    function wordPresentationIsFullscreen() {
      return wpFullscreenElement() === presenter || presenter.classList.contains('is-fallback-fullscreen');
    }

    function wpSetLayoutSwitching(active) {
      const enabled = !!active;
      document.body.classList.toggle('word-presentation-layout-switching', enabled);
      presenter.classList.toggle('is-layout-switching', enabled);
      if (enabled) {
        wpClearFitTimers();
        if (wpState.layoutSwitchReleaseTimer) clearTimeout(wpState.layoutSwitchReleaseTimer);
        if (wpState.layoutSwitchReleaseFrame) cancelAnimationFrame(wpState.layoutSwitchReleaseFrame);
        wpState.layoutSwitchReleaseTimer = 0;
        wpState.layoutSwitchReleaseFrame = 0;
        fullscreenBtn.disabled = true;
        return;
      }
      fullscreenBtn.disabled = false;
    }

    function wpReleaseLayoutSwitchSoon() {
      if (wpState.layoutSwitchReleaseTimer) clearTimeout(wpState.layoutSwitchReleaseTimer);
      if (wpState.layoutSwitchReleaseFrame) cancelAnimationFrame(wpState.layoutSwitchReleaseFrame);
      wpState.layoutSwitchReleaseTimer = 0;
      wpState.layoutSwitchReleaseFrame = 0;

      const startedAt = performance.now();
      let lastWidth = -1;
      let lastHeight = -1;
      let stableFrames = 0;
      let released = false;

      const release = () => {
        if (released) return;
        released = true;
        if (wpState.layoutSwitchReleaseTimer) clearTimeout(wpState.layoutSwitchReleaseTimer);
        if (wpState.layoutSwitchReleaseFrame) cancelAnimationFrame(wpState.layoutSwitchReleaseFrame);
        wpState.layoutSwitchReleaseTimer = 0;
        wpState.layoutSwitchReleaseFrame = 0;

        /* Bố trí đúng một lần trong khi vùng nội dung còn ẩn, rồi mới hiện lại
           ở khung hình kế tiếp. Người xem chỉ thấy trạng thái cuối cùng. */
        wpState.fitDirty = false;
        wpRunFitOnce();
        requestAnimationFrame(() => wpSetLayoutSwitching(false));
      };

      const waitForStableViewport = () => {
        if (released) return;
        const width = Math.round(Number(viewport.clientWidth) || 0);
        const height = Math.round(Number(viewport.clientHeight) || 0);
        if (Math.abs(width - lastWidth) <= 1 && Math.abs(height - lastHeight) <= 1) {
          stableFrames += 1;
        } else {
          lastWidth = width;
          lastHeight = height;
          stableFrames = 0;
        }
        if ((stableFrames >= 2 && performance.now() - startedAt >= 70)
          || performance.now() - startedAt >= 420) {
          release();
          return;
        }
        wpState.layoutSwitchReleaseFrame = requestAnimationFrame(waitForStableViewport);
      };

      wpState.layoutSwitchReleaseFrame = requestAnimationFrame(waitForStableViewport);
      wpState.layoutSwitchReleaseTimer = setTimeout(release, 460);
    }

    function wpFullscreenIconSvg(active) {
      if (active) {
        return '<svg aria-hidden="true" class="word-presentation-fullscreen-icon" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M21 3L14 10M14 5V10H19M3 21L10 14M10 19V14H5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
      }
      return '<svg aria-hidden="true" class="word-presentation-fullscreen-icon" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M14 10L21 3M16 3H21V8M10 14L3 21M8 21H3V16" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
    }

    function wpUpdateFullscreenButton() {
      if (typeof syncAlertModalHost === 'function') syncAlertModalHost();
      wpResetRegionTool();
      const active = wordPresentationIsFullscreen();
      fullscreenBtn.innerHTML = wpFullscreenIconSvg(active);
      fullscreenBtn.classList.toggle('is-fullscreen-active', active);
      fullscreenBtn.setAttribute('aria-pressed', active ? 'true' : 'false');
      fullscreenBtn.setAttribute('aria-label', active ? 'Thu nhỏ khỏi toàn màn hình' : 'Phóng to toàn màn hình');
      fullscreenBtn.title = active ? 'Thu nhỏ khỏi toàn màn hình' : 'Phóng to toàn màn hình';
    }

    function wpHandleFullscreenChange() {
      /* Chrome có thể phát cả fullscreenchange và webkitfullscreenchange.
         Gộp chúng vào một khung hình để không bố trí giao diện hai lần. */
      if (wpState.fullscreenEventFrame) return;
      wpState.fullscreenEventFrame = requestAnimationFrame(() => {
        wpState.fullscreenEventFrame = 0;
        const active = wordPresentationIsFullscreen();
        if (!active) wpStopCountdown(true);
        if (!active && wordPresentationIsOpen() && wpUsesRightControlPanel() && !wpState.closing
          && !wpState.fullscreenTransition && !wpScanSplitIsActive()) {
          wpSetScanSplit(true);
        }
        wpUpdateFullscreenButton();
        wpRequestFit(true);
      });
    }

    async function wordPresentationExitFullscreen() {
      if (wpState.fullscreenTransition) return;
      wpStopCountdown(true);
      wpState.fullscreenTransition = true;
      wpSetLayoutSwitching(true);
      const shouldReturnToSplit = wordPresentationIsOpen()
        && wpUsesRightControlPanel()
        && !wpState.closing;
      try {
        const fsElement = wpFullscreenElement();
        if (fsElement === presenter) {
          /* Chờ trình duyệt thoát native fullscreen xong rồi mới gắn bố cục
             chia đôi. Không còn trạng thái trung gian fullscreen + split. */
          if (typeof document.exitFullscreen === 'function') await document.exitFullscreen();
          else if (typeof document.webkitExitFullscreen === 'function') {
            const result = document.webkitExitFullscreen();
            if (result && typeof result.then === 'function') await result;
          }
        }

        /* Với chế độ toàn màn hình dự phòng, hai class được đổi trong cùng
           một lượt JavaScript và co chữ ngay trước lần vẽ kế tiếp. */
        presenter.classList.remove('is-fallback-fullscreen');
        if (shouldReturnToSplit) wpSetScanSplit(true);
        else wpSetScanSplit(false);
      } catch (_) {
        presenter.classList.remove('is-fallback-fullscreen');
        if (shouldReturnToSplit) wpSetScanSplit(true);
      } finally {
        if (shouldReturnToSplit && !wpScanSplitIsActive()) wpSetScanSplit(true);
        wpState.fullscreenTransition = false;
        wpUpdateFullscreenButton();
        wpReleaseLayoutSwitchSoon();
      }
    }

    async function wpEnterFullscreen() {
      if (wordPresentationIsFullscreen()) return true;
      if (wpState.fullscreenTransition) return false;

      const countdownSeconds = (wpState.viewMode === 'single'
        && (wpState.questions.length || wpOrdinaryState.kind === 'pptx-slide'))
        ? wpReadCountdownSeconds()
        : 0;
      if (countdownSeconds > 0) wpPrepareCountdownAudio();
      wpState.fullscreenTransition = true;
      wpSetLayoutSwitching(true);
      try {
        /* Gọi native fullscreen trực tiếp trong sự kiện bấm/phím Enter. Bố cục
           chia đôi chỉ được tháo sau khi trình duyệt đã nhận yêu cầu. */
        const request = presenter.requestFullscreen || presenter.webkitRequestFullscreen;
        if (typeof request !== 'function') throw new Error('Fullscreen API unavailable');
        const result = request.call(presenter);
        if (result && typeof result.then === 'function') await result;
        wpSetScanSplit(false);
      } catch (_) {
        presenter.classList.add('is-fallback-fullscreen');
        wpSetScanSplit(false);
      } finally {
        wpState.fullscreenTransition = false;
        wpUpdateFullscreenButton();
        wpReleaseLayoutSwitchSoon();
      }
      const active = wordPresentationIsFullscreen();
      if (active && countdownSeconds > 0) wpStartCountdown(countdownSeconds);
      return active;
    }

    function wpEnsureFullscreen() {
      const pending = wpEnterFullscreen();
      if (pending && typeof pending.catch === 'function') pending.catch(() => {});
      return pending;
    }

    async function wpToggleFullscreen() {
      if (wpState.fullscreenTransition) return;
      if (wordPresentationIsFullscreen()) {
        await wordPresentationExitFullscreen();
        return;
      }
      await wpEnterFullscreen();
    }

    async function wpClosePresenter() {
      wpStopCountdown(true);
      wpCloseQuestionPicker(false);
      wpState.closing = true;
      wpSetScanSplit(false);
      wpCloseImageZoom();
      wpResetRegionTool();
      wpClearLiveScan(false);
      wpState.mediaLayoutToken += 1;
      wpCancelAllViewProgressiveRender();
      if (wordPresentationIsFullscreen()) await wordPresentationExitFullscreen();
      wpClearFitTimers();
      wpResetAnswerUi();
      wpResetOrdinaryDocument();
      wpSetOrdinaryPresenterMode(false);
      presenter.hidden = true;
      presenter.setAttribute('aria-hidden', 'true');
      wpSetViewMode('single');
      document.documentElement.classList.remove('word-presentation-open');
      document.body.classList.remove('word-presentation-open');
      wpState.closing = false;
    }

    async function wpLoadFile(file) {
      if (!file || wpState.busy) return;
      const fileName = String(file.name || 'Tệp Word').trim();
      const lowerName = fileName.toLowerCase();
      if (/\.doc$/i.test(lowerName) && !/\.docx$/i.test(lowerName)) {
        throw new Error('File .doc là định dạng Word cũ nên phần mềm không hỗ trợ. Bạn mở file bằng Word, chọn Save As và lưu thành .docx rồi thử lại.');
      }
      if (!/\.(?:docx|docm)$/i.test(lowerName)) {
        throw new Error('Bạn chọn file Word định dạng .docx.');
      }
      if (typeof readRegularTestLocalQuestionFile !== 'function') {
        throw new Error('Không tìm thấy bộ đọc file Word trong trang này.');
      }

      wpState.busy = true;
      startBtn.disabled = true;
      const oldText = startBtn.textContent;
      startBtn.textContent = 'Đang đọc Word...';
      wpResetOrdinaryDocument();
      wpSetOrdinaryPresenterMode(false);
      wpShowLoading(fileName);

      try {
        const loaded = await readRegularTestLocalQuestionFile(file, { preserveHyperlinks: true });
        const loadedText = String(loaded && loaded.text || '');
        const ndtcBlocks = wpSplitNdtcBlocks(loadedText, loaded.images || {});
        const blocks = ndtcBlocks.length ? ndtcBlocks : wpSplitQuestionBlocks(loadedText);
        const prepared = blocks.map(wpPrepareBlock).filter(Boolean);
        if (!prepared.length) {
          throw new Error('Không nhận diện được nội dung trong file. File nên có các câu bắt đầu bằng “Câu 1.”, “Câu 2.”... hoặc các dòng mốc “NDTC”/“NDTC:”, “Giải NDTC”/“Giải NDTC:” (cũng hỗ trợ “NDTC1:”, “Giải NDTC1:”).');
        }

        if (typeof cv7991PreparePresenterImages === 'function') {
          try { await cv7991PreparePresenterImages(loaded.images || {}, prepared, loaded.tables || {}); } catch (_) {}
        }
        if (typeof cv7991WaitForMathJax === 'function') {
          try { await cv7991WaitForMathJax(); } catch (_) {}
        }

        wpState.context = {
          imageMap: loaded.images || {},
          tableMap: loaded.tables || {},
          equationMap: loaded.equations || {},
          linkMap: loaded.links || {},
          cv7991InteractiveQuestionMode: true,
        };
        const finalizedQuestions = prepared.map(wpFinalizeQuestion).filter(Boolean);
        wpState.questions = wpDisambiguateDuplicateQuestionNumbers(finalizedQuestions).map((question) => Object.assign(question, {
          scanSavedMarks: {},
          scanResultMarks: {},
          scanClosedItems: {},
          scanSavedRecord: null,
        }));
        wpState.index = 0;
        wpState.fileName = String(loaded.fileName || fileName).trim();
        wpState.fileUid = wpFileUid(file, wpState.fileName);
        if (!wpState.questions.length) throw new Error('File chưa có câu hỏi phù hợp để trình chiếu.');
        wpRenderQuestion(0);
      } catch (error) {
        await wpClosePresenter();
        throw error;
      } finally {
        wpState.busy = false;
        startBtn.disabled = false;
        startBtn.textContent = oldText || 'Trình chiếu tài liệu';
        wpUpdateRegionButton();
        wpRefreshAccessBanner();
      }
    }

    window.mvipLoadWordPresentationFile = wpLoadFile;
    startBtn.addEventListener('click', wpOpenDocumentModeModal);
    if (introUnifiedPresentationBtn) introUnifiedPresentationBtn.addEventListener('click', wpOpenOrdinaryDocumentPicker);
    if (introQuestionPresentationBtn) introQuestionPresentationBtn.addEventListener('click', wpChooseQuestionPresentation);
    documentModeCloseBtn.addEventListener('click', () => wpCloseDocumentModeModal(true));
    documentQuestionBtn.addEventListener('click', wpChooseQuestionPresentation);
    documentOrdinaryBtn.addEventListener('click', wpOpenOrdinaryDocumentPicker);
    documentPowerPointBtn.addEventListener('click', wpOpenPowerPointPicker);
    sourceCloseBtn.addEventListener('click', wpCloseSourceModal);
    sourceLocalBtn.addEventListener('click', wpOpenWordPicker);
    sourceSampleBtn.addEventListener('click', wpOpenSampleModal);
    sampleCloseBtn.addEventListener('click', wpCloseSampleModal);
    sourceModal.addEventListener('click', (event) => {
      if (event.target && event.target.getAttribute('data-word-presentation-choice-close') === '1') wpCloseSourceModal();
    });
    documentModeModal.addEventListener('click', (event) => {
      if (event.target && event.target.getAttribute('data-document-presentation-choice-close') === '1') {
        wpCloseDocumentModeModal(true);
      }
    });
    sampleModal.addEventListener('click', (event) => {
      if (event.target && event.target.getAttribute('data-word-presentation-sample-close') === '1') wpCloseSampleModal();
    });
    document.addEventListener('keydown', (event) => {
      if (event.key !== 'Escape') return;
      if (!sampleModal.hidden) {
        event.preventDefault();
        wpCloseSampleModal();
      } else if (!sourceModal.hidden) {
        event.preventDefault();
        wpCloseSourceModal();
      } else if (!documentModeModal.hidden) {
        event.preventDefault();
        wpCloseDocumentModeModal(true);
      }
    });

    fileInput.addEventListener('change', async (event) => {
      const file = event.target && event.target.files && event.target.files[0];
      if (!file) return;
      sourceModal.hidden = true;
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      try {
        await wpLoadFile(file);
      } catch (error) {
        wpNotify(error && error.message ? error.message : 'Không đọc được file Word.');
      } finally {
        fileInput.value = '';
      }
    });

    ordinaryFileInput.addEventListener('change', async (event) => {
      const file = event.target && event.target.files && event.target.files[0];
      if (!file) return;
      const selectedName = String(file.name || '').trim().toLowerCase();
      const isPowerPointFile = /\.(?:pptx|pptm|ppt)$/i.test(selectedName)
        || /powerpoint|presentation/i.test(String(file.type || ''));
      documentModeModal.hidden = true;
      sourceModal.hidden = true;
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      try {
        if (isPowerPointFile) await wpLoadPowerPointPresentationFile(file);
        else await wpLoadOrdinaryFile(file);
      } catch (error) {
        wpNotify(error && error.message ? error.message : 'Không đọc được tài liệu Word, PDF, Excel hoặc PowerPoint.');
      } finally {
        ordinaryFileInput.value = '';
      }
    });

    powerPointFileInput.addEventListener('change', async (event) => {
      const file = event.target && event.target.files && event.target.files[0];
      if (!file) return;
      documentModeModal.hidden = true;
      sourceModal.hidden = true;
      sampleModal.hidden = true;
      wpRefreshSourceModalLock();
      try {
        await wpLoadPowerPointPresentationFile(file);
      } catch (error) {
        wpNotify(error && error.message ? error.message : 'Không đọc được tài liệu PowerPoint.');
      } finally {
        powerPointFileInput.value = '';
      }
    });

    allBtn.addEventListener('click', () => {
      wpCloseQuestionPicker(false);
      if (wpState.viewMode === 'all') wpRenderQuestion(wpState.index);
      else wpRenderAllQuestions();
      wpEnsureFullscreen();
    });
    chooseQuestionBtn.addEventListener('click', () => {
      if (questionPickerModal.hidden) {
        /* Gọi fullscreen ngay trong chính sự kiện bấm để trình duyệt giữ quyền
           kích hoạt của người dùng. Bảng chọn câu được mở đồng thời và sẽ nằm
           bên trong presenter khi Chrome hoàn tất chuyển sang toàn màn hình. */
        wpEnsureFullscreen();
        wpOpenQuestionPicker();
      } else {
        wpCloseQuestionPicker();
      }
    });
    questionPickerCloseBtn.addEventListener('click', () => wpCloseQuestionPicker());
    questionPickerModal.addEventListener('click', (event) => {
      const target = event.target instanceof Element ? event.target : null;
      if (!target) return;
      if (target.closest('[data-word-question-picker-close="1"]')) {
        event.preventDefault();
        wpCloseQuestionPicker();
        return;
      }
      const item = target.closest('[data-word-question-picker-index]');
      if (!(item instanceof Element) || !questionPickerModal.contains(item)) return;
      const index = parseInt(String(item.getAttribute('data-word-question-picker-index') || ''), 10);
      if (wpSelectQuestionFromPicker(index)) {
        event.preventDefault();
        event.stopPropagation();
      }
    });
    questionPickerModal.addEventListener('keydown', (event) => {
      if (!['ArrowLeft', 'ArrowRight', 'ArrowDown', 'ArrowUp', 'Home', 'End'].includes(event.key)) return;
      const buttons = Array.from(questionPickerBody.querySelectorAll('.word-presentation-question-picker-item'));
      if (!buttons.length) return;
      const activeIndex = Math.max(0, buttons.indexOf(document.activeElement));
      const columnCount = Math.max(1, String(getComputedStyle(questionPickerBody).gridTemplateColumns || '')
        .split(/\s+/).filter(Boolean).length || 1);
      let nextIndex = activeIndex;
      if (event.key === 'ArrowRight') nextIndex = Math.min(buttons.length - 1, activeIndex + 1);
      else if (event.key === 'ArrowLeft') nextIndex = Math.max(0, activeIndex - 1);
      else if (event.key === 'ArrowDown') nextIndex = Math.min(buttons.length - 1, activeIndex + columnCount);
      else if (event.key === 'ArrowUp') nextIndex = Math.max(0, activeIndex - columnCount);
      else if (event.key === 'Home') nextIndex = 0;
      else if (event.key === 'End') nextIndex = buttons.length - 1;
      event.preventDefault();
      const target = buttons[nextIndex];
      if (target instanceof HTMLElement) target.focus({ preventScroll:false });
    });
    classSelect.addEventListener('change', () => wpSelectClass(classSelect.value || ''));
    resultBtn.addEventListener('click', wpPreviewScanResult);
    regionBtn.addEventListener('click', () => {
      const tool = wpRegionState();
      if (tool.zoomed || tool.selecting) {
        wpToggleRegionTool();
        return;
      }

      const startSelectionWhenReady = () => {
        if (!wordPresentationIsOpen() || !wordPresentationIsFullscreen()) return;
        const currentTool = wpRegionState();
        if (!currentTool.zoomed && !currentTool.selecting) wpStartRegionSelection();
      };

      /* requestFullscreen có trình duyệt báo trạng thái fullscreen trước khi
         Promise hoàn tất. Dùng cả Promise và vài lượt kiểm tra ngắn để vùng
         chọn luôn xuất hiện sau khi khung toàn màn hình đã ổn định. */
      const pending = wpEnterFullscreen();
      if (pending && typeof pending.then === 'function') {
        pending.then(startSelectionWhenReady).catch(startSelectionWhenReady);
      }
      [80, 220, 520, 900].forEach((delay) => setTimeout(startSelectionWhenReady, delay));
      if (wordPresentationIsFullscreen()) requestAnimationFrame(startSelectionWhenReady);
    });
    function wpAllViewQuestionIndexFromTarget(target) {
      if (wpState.viewMode !== 'all' || !(target instanceof Element)) return -1;
      const trigger = target.closest('.word-presentation-question-label[data-word-open-question-index]');
      if (!(trigger instanceof Element) || !card.contains(trigger)) return -1;
      const index = parseInt(String(trigger.getAttribute('data-word-open-question-index') || ''), 10);
      return Number.isInteger(index) && index >= 0 && index < wpState.questions.length ? index : -1;
    }

    function wpOpenAllViewQuestionFromTarget(target) {
      const index = wpAllViewQuestionIndexFromTarget(target);
      if (index < 0) return false;
      wpRenderQuestion(index);
      return true;
    }

    card.addEventListener('click', (event) => {
      const eventTarget = event.target instanceof Element ? event.target : null;
      if (!eventTarget) return;
      if (mvipDocumentLinkTarget(eventTarget)) {
        // Để trình duyệt mở tab video, không chuyển câu hoặc phóng to nội dung link.
        event.stopPropagation();
        return;
      }
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide'
        && eventTarget.closest('.ordinary-pptx-slide-render')) {
        if (eventTarget.closest('a, button, input, textarea, select, audio, video, [contenteditable="true"]')
          || wpOrdinaryAuxiliaryToolActive()) return;
        event.preventDefault();
        event.stopPropagation();
        wpAdvancePowerPointPresentation(1);
        return;
      }
      if (wpOpenAllViewQuestionFromTarget(eventTarget)) {
        event.preventDefault();
        event.stopPropagation();
        return;
      }
      // Ảnh nằm trong phương án vẫn ưu tiên chức năng phóng to ảnh.
      if (wpDirectZoomSourceFromTarget(eventTarget)) return;

      const scanTarget = eventTarget.closest('[data-word-tf-scan]');
      if (scanTarget) {
        event.preventDefault();
        event.stopPropagation();
        /* Phải gọi requestFullscreen ngay trong chính sự kiện bấm của người dùng;
           nếu chờ xử lý quét xong, Chrome có thể từ chối vì đã mất user gesture. */
        wpEnsureFullscreen();
        wpBeginTfScan(scanTarget.getAttribute('data-word-tf-scan') || '');
        return;
      }

      const tfChoiceButton = eventTarget.closest('.cv7991-tf-choice-btn[data-tf-choice]');
      if (tfChoiceButton) {
        const row = tfChoiceButton.closest('.word-presentation-item[data-letter]');
        if (row) wpSetManualTfChoiceRow(row, tfChoiceButton.getAttribute('data-tf-choice') || '', event);
        return;
      }
      const checkButton = eventTarget.closest('.cv7991-choice-check-btn');
      if (checkButton) {
        const row = checkButton.closest('.word-presentation-item[data-letter]');
        if (row) wpToggleManualSelectionRow(row, event);
        return;
      }
      if (eventTarget.closest('button, a, input, select, textarea, label')) return;
      const row = eventTarget.closest('.word-presentation-item[data-letter]');
      if (row) {
        wpToggleManualSelectionRow(row, event);
        return;
      }

      /* Ở chế độ từng câu (gồm Trình chiếu Word và Bài giảng), bấm chuột trái
         vào vùng nội dung trống sẽ chuyển sang câu/NDTC tiếp theo. Các nút,
         phương án, ảnh phóng to và công cụ vẽ đã được loại trừ ở phía trên. */
      if ((typeof event.button !== 'number' || event.button === 0)
        && wpState.documentMode !== 'ordinary'
        && wpState.viewMode !== 'all'
        && !wpState.busy
        && !wpOrdinaryAuxiliaryToolActive()
        && wpState.index < wpState.questions.length - 1) {
        event.preventDefault();
        event.stopPropagation();
        wpRenderQuestion(wpState.index + 1);
        wpEnsureFullscreen();
      }
    });
    presenter.addEventListener('click', (event) => {
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide') return;
      if (event.target instanceof Element && mvipDocumentLinkTarget(event.target)) return;
      const source = wpDirectZoomSourceFromTarget(event.target);
      if (!source) return;
      event.preventDefault();
      event.stopPropagation();
      wpOpenImageZoom(source);
    });
    presenter.addEventListener('keydown', (event) => {
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide') return;
      if (event.target instanceof Element && mvipDocumentLinkTarget(event.target)) return;
      if (!['Enter', ' '].includes(event.key)) return;
      const source = wpDirectZoomSourceFromTarget(event.target);
      if (!source) return;
      event.preventDefault();
      event.stopPropagation();
      wpOpenImageZoom(source);
    });
    imageZoomCloseBtn.addEventListener('click', wpCloseImageZoom);
    imageZoomModal.addEventListener('click', (event) => {
      const target = event.target instanceof Element ? event.target : null;
      if (target && target.closest('[data-word-image-zoom-close="1"]')) wpCloseImageZoom();
    });
    /* Chạy ở pha capture để Esc đóng lớp ảnh trước mọi bộ xử lý phím của
       presenter. Keyboard Lock (khi Chrome hỗ trợ) ngăn Esc thoát fullscreen. */
    document.addEventListener('keydown', (event) => {
      if (event.key !== 'Escape' || imageZoomModal.hidden) return;
      event.preventDefault();
      event.stopImmediatePropagation();
      wpCloseImageZoom();
      try { (fullscreenBtn || presenter).focus({ preventScroll:true }); } catch (_) {}
    }, true);
    answerBtn.addEventListener('click', wpToggleAnswerView);
    answerCloseBtn.addEventListener('click', wpCloseAnswerModal);
    answerDialogEl.addEventListener('pointerdown', wpBeginAnswerDialogDrag);
    answerDialogEl.addEventListener('pointermove', wpMoveAnswerDialogDrag);
    answerDialogEl.addEventListener('pointerup', wpEndAnswerDialogDrag);
    answerDialogEl.addEventListener('pointercancel', wpEndAnswerDialogDrag);
    window.addEventListener('resize', () => {
      if (!answerModal.hidden) wpClampAnswerDialogPosition();
    });
    answerModal.addEventListener('click', (event) => {
      const target = event.target instanceof Element ? event.target : null;
      if (target && target.closest('[data-word-answer-close="1"]')) wpCloseAnswerModal();
    });
    jumpBtn.addEventListener('click', () => {
      if (wpJumpToQuestion()) wpEnsureFullscreen();
    });
    jumpInput.addEventListener('keydown', (event) => {
      if (event.key !== 'Enter') return;
      event.preventDefault();
      event.stopPropagation();
      if (wpJumpToQuestion()) wpEnsureFullscreen();
    });
    jumpInput.addEventListener('focus', () => {
      requestAnimationFrame(() => { try { jumpInput.select(); } catch (_) {} });
    });
    const wpInterruptCountdown = () => {
      if (!wpCountdownEndAt) return;
      wpStopCountdown(true);
      countdownInput.value = '';
    };
    countdownInput.addEventListener('pointerdown', (event) => {
      if (event.button === 0) wpInterruptCountdown();
      // Let the native select open in the same pointer action.
    });
    countdownInput.addEventListener('keydown', (event) => {
      if ([' ', 'Enter', 'ArrowDown', 'ArrowUp', 'Home', 'End'].includes(event.key)
        || /^[0-9]$/.test(event.key)) wpInterruptCountdown();
    });
    countdownInput.addEventListener('change', () => {
      const seconds = wpReadCountdownSeconds();
      wpStopCountdown(false);
      if (seconds > 0 && wordPresentationIsFullscreen()) wpStartCountdown(seconds);
    });
    prevBtn.addEventListener('click', () => {
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide') {
        wpAdvancePowerPointPresentation(-1);
      } else if (wpState.documentMode === 'ordinary') wpRenderOrdinaryPage(wpOrdinaryState.pageIndex - 1);
      else wpRenderQuestion(wpState.index - 1);
    });
    nextBtn.addEventListener('click', () => {
      // Chuyển câu/trang bằng mũi tên phải không thay đổi trạng thái fullscreen.
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide') {
        wpAdvancePowerPointPresentation(1);
        return;
      } else if (wpState.documentMode === 'ordinary') wpRenderOrdinaryPage(wpOrdinaryState.pageIndex + 1);
      else wpRenderQuestion(wpState.index + 1);
    });
    fullscreenBtn.addEventListener('click', wpToggleFullscreen);
    closeBtn.addEventListener('click', wpClosePresenter);
    accessActionBtn.addEventListener('click', wpHandleAccessAction);
    powerPointPrevBtn.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      wpAdvancePowerPointPresentation(-1);
    });
    powerPointPlayBtn.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      const autoRunning = wpOrdinaryState.pptxPlaybackActive
        || (!!wpOrdinaryState.pptxAutoTimer && !wpOrdinaryState.pptxPlaybackPaused);
      const shouldPlay = !autoRunning;
      wpSetPowerPointPlayback(shouldPlay, !shouldPlay);
    });
    powerPointNextBtn.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      // Chuyển slide/build nhưng không tự chuyển sang fullscreen.
      wpAdvancePowerPointPresentation(1);
    });
    powerPointFullscreenBtn.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      wpToggleFullscreen();
    });
    powerPointCloseBtn.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      wpClosePresenter();
    });
    document.addEventListener('fullscreenchange', wpSyncPowerPointControls);
    document.addEventListener('webkitfullscreenchange', wpSyncPowerPointControls);

    document.addEventListener('keydown', (event) => {
      if (presenter.hidden) return;
      if (event.key === 'Escape') {
        if (!questionPickerModal.hidden) {
          event.preventDefault();
          event.stopPropagation();
          wpCloseQuestionPicker();
          return;
        }
        if (!imageZoomModal.hidden) {
          event.preventDefault();
          event.stopPropagation();
          wpCloseImageZoom();
          return;
        }
        if (wpState.repickPending) {
          event.preventDefault();
          event.stopPropagation();
          wpAbortRepickPendingResult();
          return;
        }
        const regionTool = wpRegionState();
        if (regionTool.selecting || regionTool.zoomed) {
          event.preventDefault();
          event.stopPropagation();
          wpResetRegionTool();
          return;
        }
        if (typeof state !== 'undefined' && state.pendingResult && state.pendingResult.wordPresentation) {
          event.preventDefault();
          event.stopPropagation();
          wpCancelPendingResult();
          return;
        }
        if (!answerModal.hidden) {
          event.preventDefault();
          event.stopPropagation();
          wpCloseAnswerModal();
          return;
        }
        if (!wordPresentationIsFullscreen()) {
          event.preventDefault();
          wpClosePresenter();
        }
        return;
      }
      const target = event.target instanceof Element ? event.target : null;
      const navigationKeys = [
        'Enter', ' ', 'ArrowRight', 'ArrowDown', 'PageDown',
        'ArrowLeft', 'ArrowUp', 'PageUp', 'Backspace', 'Home', 'End',
        'n', 'N', 'p', 'P', 'F5'
      ];
      if (!navigationKeys.includes(event.key) || event.repeat || event.isComposing
        || event.ctrlKey || event.metaKey || event.altKey) return;
      /* Không điều hướng khi đang mở một lớp chức năng phía trên màn chiếu.
         Riêng việc tiêu điểm còn ở nút trên thanh công cụ không còn chặn các
         phím mũi tên/PageUp/PageDown/Home/End như trước. */
      const regionToolForKeyboard = wpRegionState();
      if (!questionPickerModal.hidden || !imageZoomModal.hidden || !answerModal.hidden
        || wpState.repickPending || regionToolForKeyboard.selecting || regionToolForKeyboard.zoomed
        || document.body.classList.contains('mvip-whiteboard-open')
        || document.querySelector('#cv7991MagicWheelModal:not([hidden])')) return;
      if (target && target.closest('input, textarea, select, [contenteditable="true"]')) return;
      const focusedAction = target && target.closest('button, a, audio, video');
      if (focusedAction && ['Enter', ' '].includes(event.key)) return;
      if (wpState.documentMode === 'ordinary') {
        if (wpOrdinaryState.kind === 'pptx-slide' && event.key === 'F5') {
          event.preventDefault();
          event.stopPropagation();
          if (!event.shiftKey) void wpRenderPowerPointSlide(wpPowerPointVisibleSlideIndex(0), -1);
          wpEnsureFullscreen();
          return;
        }
        if (wpOrdinaryState.kind === 'pptx-slide') {
          const normalizedKey = event.key.length === 1 ? event.key.toLowerCase() : event.key;
          if (['Enter', ' ', 'ArrowRight', 'ArrowDown', 'PageDown', 'n'].includes(normalizedKey)) {
            event.preventDefault();
            event.stopImmediatePropagation();
            /* Các phím điều hướng chỉ chuyển build/slide, không tự fullscreen.
               Giữ riêng thao tác Enter để bắt đầu fullscreen theo phím tắt cũ. */
            wpAdvancePowerPointPresentation(1, { enterFullscreenOnSlideChange: event.key === 'Enter' });
          } else if (['ArrowLeft', 'ArrowUp', 'PageUp', 'Backspace', 'p'].includes(normalizedKey)) {
            event.preventDefault();
            event.stopImmediatePropagation();
            wpAdvancePowerPointPresentation(-1);
          } else if (event.key === 'Home') {
            event.preventDefault();
            event.stopImmediatePropagation();
            void wpRenderPowerPointSlide(wpPowerPointVisibleSlideIndex(0), -1);
          } else if (event.key === 'End') {
            event.preventDefault();
            event.stopImmediatePropagation();
            void wpRenderPowerPointSlide(wpPowerPointVisibleSlideIndex(wpOrdinaryState.pageCount - 1, -1), 1);
          }
          return;
        }
        if (['Enter', ' ', 'ArrowRight', 'PageDown'].includes(event.key)) {
          event.preventDefault();
          event.stopImmediatePropagation();
          if (wpOrdinaryState.pageIndex < wpOrdinaryState.pageCount - 1) {
            wpRenderOrdinaryPage(wpOrdinaryState.pageIndex + 1);
          }
          if (event.key === 'Enter') wpEnsureFullscreen();
        } else if (['ArrowLeft', 'PageUp', 'Backspace'].includes(event.key)) {
          event.preventDefault();
          event.stopImmediatePropagation();
          if (wpOrdinaryState.pageIndex > 0) wpRenderOrdinaryPage(wpOrdinaryState.pageIndex - 1);
        } else if (event.key === 'Home') {
          event.preventDefault();
          event.stopImmediatePropagation();
          wpRenderOrdinaryPage(0);
        } else if (event.key === 'End') {
          event.preventDefault();
          event.stopImmediatePropagation();
          wpRenderOrdinaryPage(wpOrdinaryState.pageCount - 1);
        }
        return;
      }
      if (target && ['Enter', ' '].includes(event.key) && wpAllViewQuestionIndexFromTarget(target) >= 0) {
        event.preventDefault();
        event.stopPropagation();
        wpOpenAllViewQuestionFromTarget(target);
        return;
      }
      if (event.key === 'Enter') {
        event.preventDefault();
        event.stopImmediatePropagation();
        if (wpState.viewMode !== 'all' && wpState.index < wpState.questions.length - 1) wpRenderQuestion(wpState.index + 1);
        wpEnsureFullscreen();
        return;
      }
      if (wpState.viewMode === 'all') return;
      if (['ArrowRight', 'ArrowDown', 'PageDown'].includes(event.key)) {
        event.preventDefault();
        event.stopImmediatePropagation();
        if (wpState.index < wpState.questions.length - 1) wpRenderQuestion(wpState.index + 1);
        // Không bật fullscreen khi chỉ dùng phím điều hướng.
      } else if (event.key === ' ') {
        event.preventDefault();
        event.stopImmediatePropagation();
        if (wpState.index < wpState.questions.length - 1) wpRenderQuestion(wpState.index + 1);
      } else if (['ArrowLeft', 'ArrowUp', 'PageUp', 'Backspace'].includes(event.key)) {
        event.preventDefault();
        event.stopImmediatePropagation();
        if (wpState.index > 0) wpRenderQuestion(wpState.index - 1);
      } else if (event.key === 'Home') {
        event.preventDefault();
        event.stopImmediatePropagation();
        wpRenderQuestion(0);
      } else if (event.key === 'End') {
        event.preventDefault();
        event.stopImmediatePropagation();
        wpRenderQuestion(wpState.questions.length - 1);
      }
    }, true);

    function wpOrdinaryAuxiliaryToolActive() {
      const regionTool = wpRegionState();
      if (regionTool.selecting || regionTool.zoomed) return true;
      const inkTool = window.mvipWordInkTool;
      if (inkTool && typeof inkTool.isActive === 'function' && inkTool.isActive()) return true;
      const geometryTool = window.mvipWordGeometryTool;
      return !!(geometryTool && geometryTool.state && String(geometryTool.state.tool || '').trim());
    }

    function wpOrdinaryTouchCenter(touches) {
      const list = Array.from(touches || []);
      if (!list.length) return { clientX: 0, clientY: 0 };
      const total = list.reduce((sum, touch) => ({
        clientX: sum.clientX + Number(touch.clientX || 0),
        clientY: sum.clientY + Number(touch.clientY || 0),
      }), { clientX: 0, clientY: 0 });
      return { clientX: total.clientX / list.length, clientY: total.clientY / list.length };
    }

    function wpOrdinaryTouchDistance(touches) {
      if (!touches || touches.length < 2) return 0;
      const dx = Number(touches[0].clientX || 0) - Number(touches[1].clientX || 0);
      const dy = Number(touches[0].clientY || 0) - Number(touches[1].clientY || 0);
      return Math.max(1, Math.hypot(dx, dy));
    }

    function wpBeginOrdinaryTouch(touches) {
      if (!touches || !touches.length) return;
      if (touches.length >= 2) {
        const center = wpOrdinaryTouchCenter(touches);
        const rect = viewport.getBoundingClientRect();
        const pointerX = Math.max(0, Math.min(viewport.clientWidth, center.clientX - rect.left));
        const pointerY = Math.max(0, Math.min(viewport.clientHeight, center.clientY - rect.top));
        wpOrdinaryState.touchMode = 'pinch';
        wpOrdinaryState.touchStartDistance = wpOrdinaryTouchDistance(touches);
        wpOrdinaryState.touchStartZoom = Math.max(wpOrdinaryState.minZoom,
          Math.min(wpOrdinaryState.maxZoom, Number(wpOrdinaryState.zoom) || 1));
        wpOrdinaryState.touchAnchorX = (viewport.scrollLeft + pointerX) / Math.max(1, viewport.scrollWidth);
        wpOrdinaryState.touchAnchorY = (viewport.scrollTop + pointerY) / Math.max(1, viewport.scrollHeight);
        wpOrdinaryState.touchMoved = false;
        viewport.classList.add('is-ordinary-panning');
        return;
      }

      const touch = touches[0];
      wpOrdinaryState.touchMode = 'pan';
      wpOrdinaryState.touchPanStartX = Number(touch.clientX || 0);
      wpOrdinaryState.touchPanStartY = Number(touch.clientY || 0);
      wpOrdinaryState.touchPanScrollLeft = viewport.scrollLeft;
      wpOrdinaryState.touchPanScrollTop = viewport.scrollTop;
      wpOrdinaryState.touchMoved = false;
      viewport.classList.add('is-ordinary-panning');
    }

    function wpHandleOrdinaryTouchStart(event) {
      if (wpState.documentMode !== 'ordinary' || presenter.hidden || wpState.busy
        || wpOrdinaryAuxiliaryToolActive() || !event.touches.length) return;
      if (event.touches.length === 1 && event.target instanceof Element
        && event.target.closest('a, button, input, textarea, select, audio, video')) return;
      wpBeginOrdinaryTouch(event.touches);
      event.preventDefault();
    }

    function wpHandleOrdinaryTouchMove(event) {
      if (!wpOrdinaryState.touchMode && event.touches.length === 1
        && event.target instanceof Element && event.target.closest('a, button, input, textarea, select, audio, video')) return;
      if (wpState.documentMode !== 'ordinary' || presenter.hidden || wpState.busy
        || wpOrdinaryAuxiliaryToolActive() || !event.touches.length) return;
      if (wpOrdinaryState.kind === 'pptx-slide') {
        if (event.touches.length !== 1) {
          wpOrdinaryState.touchMoved = true;
          event.preventDefault();
          return;
        }
        if (wpOrdinaryState.touchMode !== 'pan') wpBeginOrdinaryTouch(event.touches);
        const touch = event.touches[0];
        const dx = Number(touch.clientX || 0) - wpOrdinaryState.touchPanStartX;
        const dy = Number(touch.clientY || 0) - wpOrdinaryState.touchPanStartY;
        if (Math.abs(dx) + Math.abs(dy) > 8) wpOrdinaryState.touchMoved = true;
        event.preventDefault();
        return;
      }
      if (event.touches.length >= 2) {
        if (wpOrdinaryState.touchMode !== 'pinch') {
          wpBeginOrdinaryTouch(event.touches);
          event.preventDefault();
          return;
        }
        const center = wpOrdinaryTouchCenter(event.touches);
        const rect = viewport.getBoundingClientRect();
        const pointerX = Math.max(0, Math.min(viewport.clientWidth, center.clientX - rect.left));
        const pointerY = Math.max(0, Math.min(viewport.clientHeight, center.clientY - rect.top));
        const distance = wpOrdinaryTouchDistance(event.touches);
        const nextZoom = Math.max(wpOrdinaryState.minZoom,
          Math.min(wpOrdinaryState.maxZoom,
            wpOrdinaryState.touchStartZoom * distance / Math.max(1, wpOrdinaryState.touchStartDistance)));
        if (Math.abs(nextZoom - wpOrdinaryState.zoom) > .0001) {
          wpOrdinaryState.zoom = nextZoom;
          wpFitOrdinaryPage();
          const targetLeft = Math.max(0,
            wpOrdinaryState.touchAnchorX * Math.max(1, viewport.scrollWidth) - pointerX);
          const targetTop = Math.max(0,
            wpOrdinaryState.touchAnchorY * Math.max(1, viewport.scrollHeight) - pointerY);
          viewport.scrollLeft = targetLeft;
          viewport.scrollTop = targetTop;
          wpSyncOrdinaryPageUi();
          wpOrdinaryState.touchMoved = true;
        }
        event.preventDefault();
        return;
      }

      if (wpOrdinaryState.touchMode !== 'pan') {
        wpBeginOrdinaryTouch(event.touches);
        event.preventDefault();
        return;
      }
      const touch = event.touches[0];
      const dx = Number(touch.clientX || 0) - wpOrdinaryState.touchPanStartX;
      const dy = Number(touch.clientY || 0) - wpOrdinaryState.touchPanStartY;
      if (Math.abs(dx) + Math.abs(dy) > 4) wpOrdinaryState.touchMoved = true;
      viewport.scrollLeft = Math.max(0, wpOrdinaryState.touchPanScrollLeft - dx);
      viewport.scrollTop = Math.max(0, wpOrdinaryState.touchPanScrollTop - dy);
      event.preventDefault();
    }

    function wpHandleOrdinaryTouchEnd(event) {
      if (!wpOrdinaryState.touchMode) return;
      const endedMode = wpOrdinaryState.touchMode;
      const moved = wpOrdinaryState.touchMoved || endedMode === 'pinch';
      if (wpOrdinaryState.kind === 'pptx-slide') {
        const changedTouch = event.changedTouches && event.changedTouches[0];
        const dx = changedTouch
          ? Number(changedTouch.clientX || 0) - wpOrdinaryState.touchPanStartX
          : 0;
        const dy = changedTouch
          ? Number(changedTouch.clientY || 0) - wpOrdinaryState.touchPanStartY
          : 0;
        wpOrdinaryState.touchMode = '';
        wpOrdinaryState.touchStartDistance = 0;
        wpOrdinaryState.touchMoved = false;
        viewport.classList.remove('is-ordinary-panning');
        wpOrdinaryState.suppressClickUntil = performance.now() + 420;
        if (endedMode === 'pan' && Math.abs(dx) >= 48 && Math.abs(dx) > Math.abs(dy) * .7) {
          wpAdvancePowerPointPresentation(dx < 0 ? 1 : -1);
        } else if (!moved && endedMode === 'pan') {
          wpAdvancePowerPointPresentation(1);
        }
        event.preventDefault();
        return;
      }
      if (event.touches && event.touches.length) {
        wpBeginOrdinaryTouch(event.touches);
      } else {
        wpOrdinaryState.touchMode = '';
        wpOrdinaryState.touchStartDistance = 0;
        wpOrdinaryState.touchMoved = false;
        viewport.classList.remove('is-ordinary-panning');
        if (moved) wpOrdinaryState.suppressClickUntil = performance.now() + 360;
        wpScheduleOrdinaryPageFromScroll();
        if (!moved && endedMode === 'pan' && wpOrdinaryState.kind === 'pptx-slide') {
          const target = event.target instanceof Element ? event.target : null;
          if (!target || !target.closest('a, button, input, textarea, select, audio, video, [contenteditable="true"]')) {
            wpAdvancePowerPointPresentation(1);
          }
        }
      }
      event.preventDefault();
    }

    function wpHandleOrdinaryWheelZoom(event) {
      if (wpState.documentMode !== 'ordinary' || presenter.hidden) return;
      if (wpOrdinaryState.kind === 'pptx-slide') {
        const delta = Math.abs(Number(event.deltaY) || 0) >= Math.abs(Number(event.deltaX) || 0)
          ? Number(event.deltaY) || 0
          : Number(event.deltaX) || 0;
        if (!event.ctrlKey && Math.abs(delta) < 8) return;
        event.preventDefault();
        event.stopPropagation();
        if (event.ctrlKey || wpState.busy) return;
        const now = performance.now();
        if (now < wpOrdinaryState.pptxWheelLockUntil) return;
        wpOrdinaryState.pptxWheelLockUntil = now + 420;
        wpAdvancePowerPointPresentation(delta > 0 ? 1 : -1);
        return;
      }
      if (!event.ctrlKey) return;
      /* Chặn Ctrl+wheel của Chrome ngay trong khung tài liệu để mức zoom của
         trình duyệt không thay đổi; bên ngoài khung, Ctrl+wheel vẫn như cũ. */
      event.preventDefault();
      event.stopPropagation();
      if (wpState.busy || wpOrdinaryAuxiliaryToolActive()) return;

      const rect = viewport.getBoundingClientRect();
      const pointerX = Math.max(0, Math.min(viewport.clientWidth, event.clientX - rect.left));
      const pointerY = Math.max(0, Math.min(viewport.clientHeight, event.clientY - rect.top));
      const oldScrollWidth = Math.max(1, viewport.scrollWidth);
      const oldScrollHeight = Math.max(1, viewport.scrollHeight);
      const anchorX = (viewport.scrollLeft + pointerX) / oldScrollWidth;
      const anchorY = (viewport.scrollTop + pointerY) / oldScrollHeight;
      const normalizedDelta = Math.max(-120, Math.min(120, Number(event.deltaY) || 0));
      const factor = Math.exp(-normalizedDelta * .0016);
      wpApplyOrdinaryZoom(factor, pointerX, pointerY, anchorX, anchorY);
    }

    function wpApplyOrdinaryZoom(factor, pointerX, pointerY, presetAnchorX, presetAnchorY) {
      if (wpState.documentMode !== 'ordinary' || presenter.hidden || wpState.busy
        || wpOrdinaryState.kind === 'pptx-slide' || wpOrdinaryAuxiliaryToolActive()) return false;
      const oldZoom = Math.max(wpOrdinaryState.minZoom,
        Math.min(wpOrdinaryState.maxZoom, Number(wpOrdinaryState.zoom) || 1));
      const nextZoom = Math.max(wpOrdinaryState.minZoom,
        Math.min(wpOrdinaryState.maxZoom, oldZoom * Number(factor || 1)));
      if (Math.abs(nextZoom - oldZoom) < .0001) return false;

      const pointX = Number.isFinite(pointerX) ? pointerX : viewport.clientWidth / 2;
      const pointY = Number.isFinite(pointerY) ? pointerY : viewport.clientHeight / 2;
      const anchorX = Number.isFinite(presetAnchorX)
        ? presetAnchorX
        : (viewport.scrollLeft + pointX) / Math.max(1, viewport.scrollWidth);
      const anchorY = Number.isFinite(presetAnchorY)
        ? presetAnchorY
        : (viewport.scrollTop + pointY) / Math.max(1, viewport.scrollHeight);

      wpOrdinaryState.zoom = nextZoom;
      wpFitOrdinaryPage();
      const targetLeft = Math.max(0, anchorX * Math.max(1, viewport.scrollWidth) - pointX);
      const targetTop = Math.max(0, anchorY * Math.max(1, viewport.scrollHeight) - pointY);
      try { viewport.scrollTo({ left: targetLeft, top: targetTop, behavior: 'auto' }); }
      catch (_) {
        viewport.scrollLeft = targetLeft;
        viewport.scrollTop = targetTop;
      }
      wpSyncOrdinaryPageUi();
      wpScheduleOrdinaryPageFromScroll();
      return true;
    }

    function wpHandleOrdinaryZoomButton(factor) {
      wpApplyOrdinaryZoom(factor, viewport.clientWidth / 2, viewport.clientHeight / 2);
    }

    function wpStartOrdinaryPan(event) {
      if (wpState.documentMode !== 'ordinary' || presenter.hidden || event.button !== 0) return;
      /* PowerPoint dùng chuột trái để chạy hiệu ứng/chuyển slide. Không khởi
         động kéo-pan bằng chuột ở đây vì chỉ một rung tay vài pixel cũng từng
         làm trình duyệt hủy sự kiện click. Cảm ứng vẫn có xử lý vuốt riêng. */
      if (wpOrdinaryState.kind === 'pptx-slide') return;
      if (event.pointerType && event.pointerType !== 'mouse') return;
      if (wpOrdinaryState.zoom <= 1.001 || wpOrdinaryAuxiliaryToolActive()) return;
      const target = event.target instanceof Element ? event.target : null;
      if (target && target.closest('a, button, input, textarea, select, [contenteditable="true"], .word-presentation-region-overlay, .word-presentation-region-zoom-pane')) return;
      if (target && wpDirectZoomSourceFromTarget(target)) return;
      wpOrdinaryState.panActive = true;
      wpOrdinaryState.panPointerId = event.pointerId;
      wpOrdinaryState.panStartX = event.clientX;
      wpOrdinaryState.panStartY = event.clientY;
      wpOrdinaryState.panStartScrollLeft = viewport.scrollLeft;
      wpOrdinaryState.panStartScrollTop = viewport.scrollTop;
      wpOrdinaryState.panMoved = false;
      viewport.classList.add('is-ordinary-panning');
      try { viewport.setPointerCapture(event.pointerId); } catch (_) {}
      event.preventDefault();
    }

    function wpMoveOrdinaryPan(event) {
      if (!wpOrdinaryState.panActive || wpOrdinaryState.panPointerId !== event.pointerId) return;
      const dx = event.clientX - wpOrdinaryState.panStartX;
      const dy = event.clientY - wpOrdinaryState.panStartY;
      if (Math.abs(dx) + Math.abs(dy) > 4) wpOrdinaryState.panMoved = true;
      viewport.scrollLeft = Math.max(0, wpOrdinaryState.panStartScrollLeft - dx);
      viewport.scrollTop = Math.max(0, wpOrdinaryState.panStartScrollTop - dy);
      event.preventDefault();
    }

    function wpFinishOrdinaryPan(event) {
      if (!wpOrdinaryState.panActive || wpOrdinaryState.panPointerId !== event.pointerId) return;
      try { viewport.releasePointerCapture(event.pointerId); } catch (_) {}
      if (wpOrdinaryState.panMoved) wpOrdinaryState.suppressClickUntil = performance.now() + 320;
      wpOrdinaryState.panActive = false;
      wpOrdinaryState.panPointerId = null;
      wpOrdinaryState.panMoved = false;
      viewport.classList.remove('is-ordinary-panning');
      wpScheduleOrdinaryPageFromScroll();
    }

    viewport.addEventListener('wheel', wpHandleOrdinaryWheelZoom, { passive: false, capture: true });
    if (zoomOutBtn) zoomOutBtn.addEventListener('click', () => wpHandleOrdinaryZoomButton(1 / 1.15));
    if (zoomInBtn) zoomInBtn.addEventListener('click', () => wpHandleOrdinaryZoomButton(1.15));
    viewport.addEventListener('pointerdown', wpStartOrdinaryPan);
    viewport.addEventListener('pointermove', wpMoveOrdinaryPan);
    viewport.addEventListener('pointerup', wpFinishOrdinaryPan);
    viewport.addEventListener('pointercancel', wpFinishOrdinaryPan);
    viewport.addEventListener('touchstart', wpHandleOrdinaryTouchStart, { passive: false });
    viewport.addEventListener('touchmove', wpHandleOrdinaryTouchMove, { passive: false });
    viewport.addEventListener('touchend', wpHandleOrdinaryTouchEnd, { passive: false });
    viewport.addEventListener('touchcancel', wpHandleOrdinaryTouchEnd, { passive: false });
    viewport.addEventListener('click', (event) => {
      if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide'
        && presenter.classList.contains('is-pptx-rendering')) {
        const target = event.target instanceof Element ? event.target : null;
        if ((!target || !target.closest('a, button, input, textarea, select, audio, video, [contenteditable="true"]'))
          && !wpOrdinaryAuxiliaryToolActive()) {
          event.preventDefault();
          event.stopImmediatePropagation();
          wpAdvancePowerPointPresentation(1);
          return;
        }
      }
      if (performance.now() >= wpOrdinaryState.suppressClickUntil) return;
      event.preventDefault();
      event.stopImmediatePropagation();
    }, true);
    viewport.addEventListener('scroll', wpScheduleOrdinaryPageFromScroll, { passive: true });

    window.addEventListener('resize', () => {
      wpResetRegionTool();
      if (wordPresentationIsOpen() && wpUsesRightControlPanel()
        && !wordPresentationIsFullscreen() && !wpState.closing
        && !wpScanSplitIsActive()) {
        wpSetScanSplit(true);
      }
      wpSyncScanSplitPanelText();
      wpRequestFit();
    });
    document.addEventListener('fullscreenchange', wpHandleFullscreenChange);
    document.addEventListener('webkitfullscreenchange', wpHandleFullscreenChange);

    if (subscriptionModalEl) {
      if (typeof MutationObserver === 'function') {
        const wpSubscriptionObserver = new MutationObserver(() => {
          if (subscriptionModalEl.hidden && wpState.upgradeModalOpenFromPresentation) wpRestoreSubscriptionModalHost();
        });
        wpSubscriptionObserver.observe(subscriptionModalEl, { attributes: true, attributeFilter: ['hidden'] });
      }
      if (subscriptionCloseBtnEl) {
        subscriptionCloseBtnEl.addEventListener('click', () => setTimeout(wpRestoreSubscriptionModalHost, 0));
      }
      subscriptionModalEl.addEventListener('click', (event) => {
        const target = event.target instanceof Element ? event.target : null;
        if (target && target.getAttribute('data-subscription-close') === '1') {
          setTimeout(wpRestoreSubscriptionModalHost, 0);
        }
      });
    }

    /* CSS thay đổi left/right/top không luôn tạo window.resize. Quan sát trực
       tiếp vùng trình chiếu để co chữ ngay khi khung đổi kích thước. */
    if (typeof ResizeObserver === 'function') {
      let wpObservedViewportWidth = -1;
      let wpObservedViewportHeight = -1;
      let wpObservedPowerPointRoot = null;
      const wpViewportObserver = new ResizeObserver((entries) => {
        if (!wordPresentationIsOpen() || wpState.viewMode === 'all') return;
        const entry = Array.isArray(entries) ? entries[entries.length - 1] : null;
        const rect = entry && entry.contentRect;
        const width = Math.round(Number(rect && rect.width) || Number(viewport.clientWidth) || 0);
        const height = Math.round(Number(rect && rect.height) || Number(viewport.clientHeight) || 0);
        const currentPowerPointRoot = wpOrdinaryState.kind === 'pptx-slide'
          ? wpOrdinaryState.pptxRoot : null;
        const powerPointRootChanged = currentPowerPointRoot !== wpObservedPowerPointRoot;
        if (Math.abs(width - wpObservedViewportWidth) <= 1
          && Math.abs(height - wpObservedViewportHeight) <= 1
          && !powerPointRootChanged) return;
        wpObservedViewportWidth = width;
        wpObservedViewportHeight = height;
        wpObservedPowerPointRoot = currentPowerPointRoot;
        /* Với slide PowerPoint, fit ngay theo kích thước mà ResizeObserver vừa
           đo và đồng thời xóa độ cuộn của khung cũ. Các chế độ Word còn lại
           tiếp tục dùng bộ gom lịch để tránh chữ/bảng bị fit lặp. */
        if (wpState.documentMode === 'ordinary' && wpOrdinaryState.kind === 'pptx-slide') {
          wpFitOrdinaryPage();
        } else {
          wpRequestFit();
        }
      });
      wpViewportObserver.observe(viewport);
    }

    window.wordPresentationIsOpen = wordPresentationIsOpen;
    window.wordPresentationIsPowerPoint = () => wordPresentationIsOpen()
      && wpState.documentMode === 'ordinary'
      && wpOrdinaryState.kind === 'pptx-slide';
    window.wordPresentationIsFullscreen = wordPresentationIsFullscreen;
    window.wordPresentationExitFullscreen = wordPresentationExitFullscreen;
    window.wordPresentationIsScanSplit = wpScanSplitIsActive;
    window.wordPresentationCurrentScoreItem = () => {
      if (!wordPresentationIsOpen() || wpState.viewMode !== 'single') return null;
      const question = wpCurrentQuestion();
      if (!question || !['mc', 'tf'].includes(question.format)) return null;
      return { type: question.format === 'tf' ? 'true_false' : 'single' };
    };
    window.wordPresentationHandleScanMessage = wpHandleScanMessage;
    window.wordPresentationHasRecognizedScanAnswer = () => {
      const question = wpCurrentQuestion();
      return wordPresentationIsOpen() && wpState.documentMode !== 'ordinary'
        && wpState.viewMode === 'single' && !!question
        && ['mc', 'tf'].includes(question.format) && !!question.hasParsedAnswer;
    };
    window.wordPresentationClearRepickState = () => { wpState.repickPending = null; };
    window.wordPresentationRefreshScanUi = () => {
      if (!wordPresentationIsOpen()) return;
      // Remote v26: giữ nguyên native fullscreen của câu hỏi. Danh sách học sinh
      // được phủ lên trên phần trình chiếu sau khi nhận thẻ hợp lệ đầu tiên,
      // thay vì thu nhỏ/chia màn hình như cơ chế cũ.
      const region = wpRegionState();
      if (region.selecting || region.zoomed) wpResetRegionTool();
      wpUpdateScanUi();
      try {
        if (typeof window.mvipRemoteMaybeShowScanOverlay === 'function') {
          window.mvipRemoteMaybeShowScanOverlay();
        }
      } catch (_) {}
    };
    window.wordPresentationSavePendingResult = wpSavePendingResult;
    window.wordPresentationCancelPendingResult = wpCancelPendingResult;
    window.wordPresentationRepickPendingResult = wpRepickPendingResult;
    window.wordPresentationHandleRepickChoice = wpHandleRepickChoice;
    window.wordPresentationIsRepickingResult = () => !!wpState.repickPending;
    window.refreshWordPresentationAccess = wpRefreshAccess;
    window.refreshWordPresentationClassOptions = wpRefreshClassOptions;
    window.wordPresentationShowAll = () => {
      wpRenderAllQuestions();
      wpEnsureFullscreen();
    };
    window.wordPresentationGoToQuestion = (number) => {
      jumpInput.value = String(number == null ? '' : number);
      if (wpJumpToQuestion()) wpEnsureFullscreen();
    };
    window.fitWordPresentationSlide = fitWordPresentationSlide;
    window.mvipWordPresentationDisplay = Object.assign({}, window.mvipWordPresentationDisplay || {}, {
      scaleFormulas: (fontSize, root) => wpScaleInlineMathTypeFormulas(fontSize, root),
      applySingleViewMediaMetrics: (targetCard, targetViewport, tablePredicate) =>
        cv7991ApplyUnifiedSingleViewMediaMetrics(targetCard, targetViewport, tablePredicate),
      refreshSingleLineOptions: (root) => {
        if (typeof cv7991RefreshSingleLineOptionClasses === 'function') cv7991RefreshSingleLineOptionClasses(root);
      },
      prepareImageZoom: (root) => wpPrepareDirectImageZoom(root),
      sourceFromTarget: (target, root) => wpDirectZoomSourceFromTarget(target, root || presenter),
      openImageZoom: (source, hostRoot) => wpOpenImageZoom(source, hostRoot),
      closeImageZoom: () => wpCloseImageZoom(),
      isImageZoomOpen: () => !imageZoomModal.hidden
    });
    wpRefreshAccess();
    wpUpdateRegionButton();
  })();
</script>

<script id="cv7991-presentation-image-click-v13">
(() => {
  'use strict';
  const roots = () => ['singleExamSlide', 'wordPresentationCard', 'wordPresentationAnswerContent']
    .map(id => document.getElementById(id)).filter(root => root instanceof Element);
  const api = () => window.mvipWordPresentationDisplay;
  function prepareRoot(root) {
    if (!(root instanceof Element) || !api()) return;
    api().prepareImageZoom(root);
    root.querySelectorAll('.cv7991-click-zoom-media-panel').forEach(panel =>
      panel.classList.remove('cv7991-click-zoom-media-panel'));
  }
  function normalizeVisual(element, root) {
    return api() && api().sourceFromTarget(element, root) || null;
  }
  function rootInfoFromTarget(target) {
    if (!(target instanceof Element) || target.closest(cv7991PowerPointNoObjectZoomSelector)) return null;
    return roots().filter(root => root.contains(target)).map(root => ({root,
      host:root.closest('#singleExamPresenter, #wordPresentationPresenter')}))
      .find(info => info.host && !info.host.hidden) || null;
  }
  function blockedClickTarget(target) {
    const geometryActive = [window.mvipWordGeometryTool, window.mvipSingleExamGeometryTool]
      .some(tool => tool && typeof tool.tool === 'function' && !!tool.tool());
    return geometryActive || !!target.closest([
      'button', 'input', 'select', 'textarea', 'a', 'label', 'audio', 'video',
      '[contenteditable="true"]', '#mvipWhiteboardPanel',
      '.pptx-native-interaction-layer', '.pptx-native-countdown',
      '.word-presentation-ink-canvas', '.cv7991-geometry-canvas',
      cv7991ZoomExcludedSelector
    ].join(', '));
  }
  function sourceFromEvent(event, root) {
    const target = event.target instanceof Element ? event.target : null;
    const object = cv7991MediaZoomObject(target);
    // Never fall through from a blocked Shape to a different image in its panel.
    if (object && root.contains(object)) return normalizeVisual(object, root);
    if (event.type === 'keydown') return null;
    const x = Number(event.clientX), y = Number(event.clientY);
    if (!Number.isFinite(x) || !Number.isFinite(y)) return null;
    const state = cv7991RefreshMediaZoomPolicy(root);
    const hits = state.objects.filter(node => {
      if (!state.visible.has(node)) return false;
      const rect = node.getBoundingClientRect();
      return x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom;
    });
    if (hits.some(node => state.blocked.has(node))) return null;
    hits.sort((a, b) => {
      const ra = a.getBoundingClientRect(), rb = b.getBoundingClientRect();
      return ra.width * ra.height - rb.width * rb.height;
    });
    return hits.length ? normalizeVisual(hits[0], root) : null;
  }
  function openFromEvent(event) {
    if (!event || (typeof event.button === 'number' && event.button !== 0)) return false;
    const target = event.target instanceof Element ? event.target : null;
    if (!target || blockedClickTarget(target)) return false;
    const info = rootInfoFromTarget(target);
    if (!info || !api()) return false;
    prepareRoot(info.root);
    const source = sourceFromEvent(event, info.root);
    if (!source) return false;
    event.preventDefault(); event.stopPropagation();
    if (typeof event.stopImmediatePropagation === 'function') event.stopImmediatePropagation();
    api().openImageZoom(source, info.host);
    return true;
  }
  document.addEventListener('click', openFromEvent, true);
  document.addEventListener('keydown', event => {
    if (['Enter', ' '].includes(event.key) && event.target instanceof Element
        && event.target.hasAttribute('data-word-image-zoom')) openFromEvent(event);
  }, true);
  let scheduled = false;
  function schedulePrepareAll() {
    if (scheduled) return;
    scheduled = true;
    requestAnimationFrame(() => { scheduled = false; roots().forEach(prepareRoot); });
  }
  const observed = new WeakSet();
  const resize = typeof ResizeObserver === 'function' ? new ResizeObserver(schedulePrepareAll) : null;
  roots().forEach(root => {
    if (observed.has(root)) return;
    observed.add(root);
    const layoutClass = value => String(value || '').split(/\s+/).filter(name => name
      && !['cv7991-media-zoom-object', 'cv7991-shape-overlap', 'cv7991-question-has-shapes',
        'cv7991-click-zoom-media-panel', 'cv7991-presentation-image-frame', 'word-presentation-direct-zoom'].includes(name)).sort().join(' ');
    if (typeof MutationObserver === 'function') new MutationObserver(records => {
      if (records.some(record => record.attributeName !== 'class'
          || layoutClass(record.oldValue) !== layoutClass(record.target.getAttribute('class')))) schedulePrepareAll();
    })
      .observe(root, {childList:true, subtree:true, attributes:true,
        attributeOldValue:true, attributeFilter:['class', 'style', 'hidden', 'src', 'width', 'height',
          'transform', 'viewBox', 'd', 'data-cv7991-pptx-kind']});
    if (resize) resize.observe(root);
  });
  window.addEventListener('resize', schedulePrepareAll);
  document.addEventListener('fullscreenchange', schedulePrepareAll);
  document.addEventListener('webkitfullscreenchange', schedulePrepareAll);
  ['focusin', 'focusout'].forEach(type => document.addEventListener(type, event => {
    if (event.target instanceof Element && event.target.hasAttribute('data-word-image-zoom')) schedulePrepareAll();
  }));
  document.addEventListener('load', event => {
    if (event.target instanceof Element && rootInfoFromTarget(event.target)) schedulePrepareAll();
  }, true);
  if (document.fonts && document.fonts.ready) document.fonts.ready.then(schedulePrepareAll);
  schedulePrepareAll();
  [80, 240, 600].forEach(delay => setTimeout(schedulePrepareAll, delay));
})();
</script>

<script id="cv7991-cached-answer-feedback-audio-20260821">
(() => {
  'use strict';

  const CACHE_NAME = 'mvip-answer-feedback-audio-v2';
  const BASE = '/Am%20thanh/';
  const FILES = Object.freeze({
    mcCorrect:'Dung_roi.mp3',
    mcWrong:'rat_tiec_sai_roi.mp3',
    tf0:'sai_het_roi.mp3',
    tf1:'ban_dung_mot_y.mp3',
    tf2:'ban_dung_hai_y.mp3',
    tf3:'ban_dung_ba_y.mp3',
    tf4:'ban_dung_bon_y.mp3'
  });
  const URLS = Object.freeze(Object.fromEntries(
    Object.entries(FILES).map(([key, file]) => [key, BASE + encodeURIComponent(file)])
  ));
  const objectUrls = new Map();
  let currentAudio = null;
  let prefetchStarted = false;

  async function cacheResponse(url) {
    if (!('caches' in window) || !window.isSecureContext) return null;
    try {
      const cache = await caches.open(CACHE_NAME);
      const cached = await cache.match(url, { ignoreSearch:true });
      if (cached) return cached;
      const response = await fetch(url, { credentials:'same-origin', cache:'force-cache' });
      if (!response.ok) throw new Error(`HTTP ${response.status}`);
      await cache.put(url, response.clone());
      return response;
    } catch (error) {
      console.warn('[MVIP AUDIO CACHE]', url, error);
      return null;
    }
  }

  async function sourceFor(url) {
    if (objectUrls.has(url)) return objectUrls.get(url);
    try {
      const response = await cacheResponse(url);
      if (response) {
        const blob = await response.blob();
        const objectUrl = URL.createObjectURL(blob);
        objectUrls.set(url, objectUrl);
        return objectUrl;
      }
    } catch (_) {}
    return url;
  }

  async function playKey(key) {
    const url = URLS[key];
    if (!url) return false;
    try {
      if (currentAudio) {
        currentAudio.pause();
        currentAudio.currentTime = 0;
      }
      const source = await sourceFor(url);
      const audio = new Audio(source);
      currentAudio = audio;
      audio.preload = 'auto';
      audio.volume = 1;
      audio.addEventListener('ended', () => {
        if (currentAudio === audio) currentAudio = null;
      }, { once:true });
      await audio.play();
      return true;
    } catch (error) {
      console.warn('[MVIP AUDIO PLAY]', key, error);
      return false;
    }
  }

  async function prefetchAll() {
    if (prefetchStarted) return;
    prefetchStarted = true;
    const entries = Object.values(URLS);
    await Promise.allSettled(entries.map((url) => cacheResponse(url)));
  }

  window.cv7991PlayMultipleChoiceFeedback = function cv7991PlayMultipleChoiceFeedback(isCorrect) {
    return playKey(isCorrect ? 'mcCorrect' : 'mcWrong');
  };

  window.cv7991PlayTrueFalseFeedback = function cv7991PlayTrueFalseFeedback(correctCount) {
    const count = Math.max(0, Math.min(4, parseInt(String(correctCount || 0), 10) || 0));
    return playKey(`tf${count}`);
  };

  window.cv7991PrefetchAnswerFeedbackAudio = prefetchAll;

  const startPrefetch = () => {
    if ('requestIdleCallback' in window) requestIdleCallback(() => prefetchAll(), { timeout:2500 });
    else setTimeout(prefetchAll, 700);
  };
  if (document.readyState === 'complete') startPrefetch();
  else window.addEventListener('load', startPrefetch, { once:true });

  window.addEventListener('pagehide', () => {
    if (currentAudio) {
      try { currentAudio.pause(); } catch (_) {}
      currentAudio = null;
    }
  });
})();
</script>

<style id="cv7991-word-presentation-ink-tools-20260820">
  .word-presentation-toolbar {
    position:relative;
    z-index:35;
    overflow:visible !important;
  }
  .word-presentation-ink-tools {
    position:relative;
    flex:0 0 auto;
    display:inline-flex;
    align-items:center;
    gap:4px;
  }
  .word-presentation-toolbar .word-presentation-ink-mode-btn,
  .word-presentation-toolbar .word-presentation-ink-color-btn {
    width:36px;
    min-width:36px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid #94a3b8 !important;
    border-radius:8px;
    box-sizing:border-box;
  }
  .word-presentation-ink-mode-btn {
    color:#1d4ed8 !important;
    border-color:#2563eb !important;
    background:#eff6ff !important;
  }
  .word-presentation-ink-mode-btn:hover:not(:disabled),
  .word-presentation-ink-mode-btn[aria-expanded="true"] {
    color:#fff !important;
    border-color:#0f766e !important;
    background:#0f766e !important;
  }
  .word-presentation-ink-mode-btn svg,
  .word-presentation-ink-tool-option svg {
    width:21px;
    height:21px;
    display:block;
    flex:0 0 auto;
    pointer-events:none;
  }
  .word-presentation-ink-color-btn {
    border-color:#94a3b8 !important;
    background:#fff !important;
  }
  .word-presentation-ink-color-btn[hidden] { display:none !important; }
  .word-presentation-ink-color-btn[aria-expanded="true"] {
    border-color:#7c3aed !important;
    box-shadow:0 0 0 3px rgba(124,58,237,.15);
  }
  .word-presentation-ink-current-color {
    width:19px;
    height:19px;
    border:2px solid #fff;
    border-radius:50%;
    box-shadow:0 0 0 1px #64748b;
    background:#ef4444;
    pointer-events:none;
  }
  .word-presentation-ink-current-color[hidden],
  .word-presentation-ink-current-eraser[hidden] { display:none !important; }
  .word-presentation-ink-current-eraser {
    width:var(--wp-eraser-button-size, 16px);
    height:var(--wp-eraser-button-size, 16px);
    min-width:8px;
    min-height:8px;
    max-width:22px;
    max-height:22px;
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.72);
    box-shadow:0 0 0 1px rgba(255,255,255,.9);
    pointer-events:none;
  }
  .word-presentation-ink-tool-menu[hidden],
  .word-presentation-ink-palette[hidden] { display:none !important; }
  .word-presentation-ink-tool-menu,
  .word-presentation-ink-palette {
    position:absolute;
    top:calc(100% + 8px);
    z-index:225;
    box-sizing:border-box;
    border:1px solid #cbd5e1;
    border-radius:12px;
    background:#fff;
    box-shadow:0 16px 38px rgba(15,23,42,.28);
  }
  .word-presentation-ink-tool-menu {
    left:0;
    width:198px;
    padding:7px;
    display:grid;
    grid-template-columns:1fr;
    gap:4px;
  }
  .word-presentation-toolbar .word-presentation-ink-tool-option {
    width:100%;
    min-height:38px;
    height:auto;
    padding:7px 10px !important;
    display:flex;
    align-items:center;
    justify-content:flex-start;
    gap:10px;
    border:1px solid transparent !important;
    border-radius:9px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:13px;
    font-weight:800;
    text-align:left;
    white-space:nowrap;
  }
  .word-presentation-toolbar .word-presentation-ink-tool-option:hover,
  .word-presentation-toolbar .word-presentation-ink-tool-option[aria-checked="true"] {
    border-color:#93c5fd !important;
    background:#eff6ff !important;
    color:#1d4ed8 !important;
  }
  .word-presentation-toolbar .word-presentation-ink-tool-option[aria-checked="true"]::after {
    content:'✓';
    margin-left:auto;
    color:#16a34a;
    font-size:15px;
    font-weight:900;
  }
  .word-presentation-ink-palette {
    left:40px;
    width:184px;
    padding:10px;
    display:grid;
    grid-template-columns:repeat(4, 34px);
    justify-content:center;
    gap:8px;
  }
  .word-presentation-ink-palette.is-single-color {
    width:58px;
    grid-template-columns:34px;
  }
  .word-presentation-ink-palette.is-eraser-sizes {
    width:184px;
    grid-template-columns:repeat(4, 34px);
  }
  .word-presentation-toolbar .word-presentation-ink-swatch {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    border:2px solid #e2e8f0 !important;
    border-radius:50% !important;
    background:var(--wp-ink-swatch, #ef4444) !important;
    box-shadow:inset 0 0 0 3px #fff;
  }
  .word-presentation-toolbar .word-presentation-ink-swatch:hover,
  .word-presentation-toolbar .word-presentation-ink-swatch[aria-checked="true"] {
    border-color:#0f172a !important;
    transform:scale(1.07);
  }
  .word-presentation-toolbar .word-presentation-ink-size-option {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    display:flex;
    align-items:center;
    justify-content:center;
    border:2px solid #e2e8f0 !important;
    border-radius:8px !important;
    background:#fff !important;
  }
  .word-presentation-toolbar .word-presentation-ink-size-option:hover,
  .word-presentation-toolbar .word-presentation-ink-size-option[aria-checked="true"] {
    border-color:#0f172a !important;
    background:#eff6ff !important;
    transform:scale(1.05);
  }
  .word-presentation-ink-size-square {
    width:var(--wp-eraser-preview, 16px);
    height:var(--wp-eraser-preview, 16px);
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.78);
    pointer-events:none;
  }
  .word-presentation-ink-canvas {
    position:absolute;
    left:0;
    top:0;
    z-index:20;
    display:block;
    width:100%;
    height:100%;
    pointer-events:none;
    touch-action:none;
    user-select:none;
    -webkit-user-select:none;
    cursor:default;
  }
  .word-presentation-laser-canvas {
    z-index:21;
    pointer-events:none !important;
    opacity:1;
    transition:opacity .48s ease-out;
  }
  .word-presentation-laser-canvas.is-fading { opacity:0; }
  .word-presentation-ink-eraser-cursor {
    position:absolute;
    left:0;
    top:0;
    z-index:23;
    display:none;
    box-sizing:border-box;
    border:2px solid rgba(15,23,42,.9);
    border-radius:2px;
    background:rgba(255,255,255,.12);
    box-shadow:0 0 0 1px rgba(255,255,255,.88), 0 1px 5px rgba(15,23,42,.24);
    pointer-events:none;
    transform:translate(-50%, -50%);
  }
  .word-presentation-ink-eraser-cursor.is-visible { display:block; }
  .word-presentation-ink-canvas.is-active { pointer-events:auto; }
  .word-presentation-ink-canvas.is-active[data-tool="pen"] { cursor:crosshair; }
  .word-presentation-ink-canvas.is-active[data-tool="eraser"] { cursor:none; }
  .word-presentation-ink-canvas.is-active[data-tool="laser"] { cursor:none; }
  .word-presentation-ink-canvas.is-active[data-tool="highlighter"] { cursor:crosshair; }
  .word-presentation-presenter.is-ink-active .word-presentation-viewport { cursor:crosshair; }
  @media (max-width:760px) {
    .word-presentation-toolbar .word-presentation-ink-mode-btn,
    .word-presentation-toolbar .word-presentation-ink-color-btn {
      width:32px;
      min-width:32px;
      height:32px;
      min-height:32px;
    }
    .word-presentation-ink-tool-menu { left:-4px; width:188px; }
    .word-presentation-ink-palette { left:34px; width:176px; }
    .word-presentation-ink-palette.is-single-color { width:58px; }
  }
</style>
<script id="mvip-chronological-drawing-history">
(() => {
  'use strict';
  let sequence = 0;
  let lastSurface = null;
  const layers = new WeakMap();
  const gestures = new WeakMap();
  const scopes = {
    wordPresentationViewport:'wordPresentationViewport',
    wordPresentationSideInkDock:'wordPresentationViewport',
    wordPresentationInkTools:'wordPresentationViewport',
    singleExamSlide:'singleExamSlide',
    singleExamSideInkDock:'singleExamSlide',
    singleExamInkTools:'singleExamSlide',
    wordPresentationImageZoomModal:'wordPresentationImageZoomContent',
    mvipWhiteboardPanel:'mvipWhiteboardSurface'
  };
  function eventSurface(event) {
    for (const node of event.composedPath()) {
      if (node instanceof Element && scopes[node.id]) {
        return document.getElementById(scopes[node.id]);
      }
    }
    return null;
  }
  window.addEventListener('pointerdown', event => {
    const surface = eventSurface(event);
    if (!surface || (event.pointerType === 'mouse' && event.button !== 0)) return;
    lastSurface = surface;
    gestures.set(surface, {pointerId:event.pointerId, order:++sequence});
  }, true);
  ['pointerup', 'pointercancel'].forEach(type => window.addEventListener(type, event => {
    const surface = eventSurface(event);
    const gesture = surface && gestures.get(surface);
    // Both eraser layers commit in this event before its shared action ends.
    if (gesture && gesture.pointerId === event.pointerId) setTimeout(() => {
      if (gestures.get(surface) === gesture) gestures.delete(surface);
    }, 0);
  }, true));
  window.mvipDrawingHistory = {
    stamp(surface) { return gestures.get(surface)?.order || ++sequence; },
    register(surface, kind, provider) {
      if (!layers.has(surface)) layers.set(surface, new Map());
      layers.get(surface).set(kind, provider);
    },
    lastSurface:() => lastSurface,
    undo(surface) {
      const providers = Array.from(layers.get(surface)?.values() || []);
      providers.forEach(provider => provider.finish?.());
      const order = Math.max(0, ...providers.map(provider => provider.peek()));
      if (!order) return false;
      let changed = false;
      // One eraser gesture can affect both layers; restore both together.
      providers.forEach(provider => {
        while (provider.peek() === order) {
          if (!provider.undo()) break;
          changed = true;
        }
      });
      providers.forEach(provider => provider.afterUndo?.(order));
      lastSurface = surface;
      return changed;
    }
  };
})();

</script>
<script id="cv7991-word-presentation-ink-script-20260820">
(() => {
  'use strict';

  const presenter = document.getElementById('wordPresentationPresenter');
  const toolbarActions = presenter && presenter.querySelector('.word-presentation-actions');
  const scanTools = document.getElementById('wordPresentationScanTools');
  const viewport = document.getElementById('wordPresentationViewport');
  const card = document.getElementById('wordPresentationCard');
  const progress = document.getElementById('wordPresentationProgress');
  const regionBtn = document.getElementById('wordPresentationRegionBtn');
  if (!(presenter instanceof HTMLElement)
      || !(toolbarActions instanceof HTMLElement)
      || !(viewport instanceof HTMLElement)) return;

  const ICONS = Object.freeze({
    cursor:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 3.5 18.2 13l-6.1 1.1 3.4 5.1-2.8 1.8-3.3-5.2L5 20V3.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    pen:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 20l4.2-1 10.4-10.4a2.1 2.1 0 0 0 0-3L18.4 5.4a2.1 2.1 0 0 0-3 0L5 15.8 4 20Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="m13.9 6.9 3.2 3.2M4 20h5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    eraser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m7.2 18.7-3.1-3.1a2 2 0 0 1 0-2.8l8.5-8.5a2 2 0 0 1 2.8 0l4.3 4.3a2 2 0 0 1 0 2.8l-7.3 7.3H7.2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m9.2 7.7 7.1 7.1M7.2 18.7H20" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    laser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 19 15.7 8.3l-3-3L2 16l3 3Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m13.4 10.6 2.8 2.8M17.5 4.5 20 2M19.5 8H23M16 1v3.5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    highlighter:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m5 14 8.8-8.8 5 5L10 19H5v-5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m11.5 7.5 5 5M3 22h18" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>'
  });

  const TOOL_DEFS = Object.freeze([
    { id:'cursor', label:'Con trỏ chuột' },
    { id:'pen', label:'Bút' },
    { id:'eraser', label:'Tẩy' },
    { id:'laser', label:'Bút laze' },
    { id:'highlighter', label:'Bút nhớ' }
  ]);
  const TOOL_IDS = new Set(TOOL_DEFS.map((entry) => entry.id));
  const PEN_COLORS = Object.freeze([
    { value:'#ef4444', name:'Đỏ' },
    { value:'#7c3aed', name:'Tím' },
    { value:'#facc15', name:'Vàng' },
    { value:'#2563eb', name:'Xanh' }
  ]);
  const HIGHLIGHTER_COLORS = Object.freeze([
    { value:'#A8FF00', name:'Xanh huỳnh quang hiện tại' },
    { value:'#D4FF00', name:'Vàng xanh huỳnh quang' },
    { value:'#FF4FA3', name:'Hồng' },
    { value:'#A855F7', name:'Tím' }
  ]);
  const ERASER_SIZES = Object.freeze([
    { value:52, preview:24, name:'Tẩy rất to' },
    { value:38, preview:19, name:'Tẩy to' },
    { value:26, preview:14, name:'Tẩy vừa' },
    { value:16, preview:9, name:'Tẩy nhỏ' }
  ]);

  const tools = document.createElement('div');
  tools.className = 'word-presentation-ink-tools';
  tools.id = 'wordPresentationInkTools';

  const modeBtn = document.createElement('button');
  modeBtn.type = 'button';
  modeBtn.className = 'word-presentation-ink-mode-btn';
  modeBtn.id = 'wordPresentationInkModeBtn';
  modeBtn.setAttribute('aria-haspopup', 'menu');
  modeBtn.setAttribute('aria-expanded', 'false');

  const colorBtn = document.createElement('button');
  colorBtn.type = 'button';
  colorBtn.className = 'word-presentation-ink-color-btn';
  colorBtn.id = 'wordPresentationInkColorBtn';
  colorBtn.setAttribute('aria-expanded', 'false');
  colorBtn.setAttribute('aria-haspopup', 'menu');
  colorBtn.innerHTML = '<span class="word-presentation-ink-current-color" aria-hidden="true"></span><span class="word-presentation-ink-current-eraser" aria-hidden="true" hidden></span>';
  colorBtn.hidden = false;

  const toolMenu = document.createElement('div');
  toolMenu.className = 'word-presentation-ink-tool-menu';
  toolMenu.id = 'wordPresentationInkToolMenu';
  toolMenu.hidden = true;
  toolMenu.setAttribute('role', 'menu');
  toolMenu.setAttribute('aria-label', 'Chọn công cụ trình chiếu');

  const palette = document.createElement('div');
  palette.className = 'word-presentation-ink-palette';
  palette.id = 'wordPresentationInkPalette';
  palette.hidden = true;
  palette.setAttribute('role', 'menu');
  palette.setAttribute('aria-label', 'Bảng chọn màu');

  tools.append(modeBtn, colorBtn, toolMenu, palette);
  toolbarActions.insertBefore(tools, scanTools instanceof Node ? scanTools : toolbarActions.firstChild);

  const canvas = document.createElement('canvas');
  canvas.className = 'word-presentation-ink-canvas';
  canvas.id = 'wordPresentationInkCanvas';
  canvas.setAttribute('aria-hidden', 'true');
  viewport.appendChild(canvas);

  const laserCanvas = document.createElement('canvas');
  laserCanvas.className = 'word-presentation-ink-canvas word-presentation-laser-canvas';
  laserCanvas.id = 'wordPresentationLaserCanvas';
  laserCanvas.setAttribute('aria-hidden', 'true');
  viewport.appendChild(laserCanvas);

  const eraserCursor = document.createElement('div');
  eraserCursor.className = 'word-presentation-ink-eraser-cursor';
  eraserCursor.id = 'wordPresentationInkEraserCursor';
  eraserCursor.setAttribute('aria-hidden', 'true');
  viewport.appendChild(eraserCursor);

  const state = {
    tool:'cursor',
    penColor:'#ef4444',
    highlighterColor:'#A8FF00',
    eraserWidth:38,
    lastPointerClientX:null,
    lastPointerClientY:null,
    drawing:false,
    pointerId:null,
    snapGuide:null,
    currentStroke:null,
    strokes:[],
    laserPoints:[],
    laserHoverPoint:null,
    cssWidth:0,
    cssHeight:0,
    dpr:1,
    lastSignature:'',
    resizeFrame:0,
    laserFadeTimer:0,
    laserClearTimer:0,
    suppressRegionReset:false
  };

  try {
    const stored = String(localStorage.getItem('mvip_word_pen_color')
      || localStorage.getItem('mvip_word_ink_color') || '').trim();
    if (PEN_COLORS.some((entry) => entry.value === stored)) state.penColor = stored;
    const storedHighlighter = String(localStorage.getItem('mvip_highlighter_color') || '').trim();
    if (HIGHLIGHTER_COLORS.some((entry) => entry.value === storedHighlighter)) state.highlighterColor = storedHighlighter;
    const storedEraser = Number(localStorage.getItem('mvip_word_eraser_size') || 0);
    if (ERASER_SIZES.some((entry) => entry.value === storedEraser)) state.eraserWidth = storedEraser;
  } catch (_) {}

  const currentColor = colorBtn.querySelector('.word-presentation-ink-current-color');
  const currentEraser = colorBtn.querySelector('.word-presentation-ink-current-eraser');
  const toolButtons = new Map();

  TOOL_DEFS.forEach((entry) => {
    const button = document.createElement('button');
    button.type = 'button';
    button.className = 'word-presentation-ink-tool-option';
    button.setAttribute('role', 'menuitemradio');
    button.setAttribute('data-ink-tool', entry.id);
    button.setAttribute('aria-label', entry.label);
    button.innerHTML = `${ICONS[entry.id]}<span>${entry.label}</span>`;
    button.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      setTool(entry.id);
      modeBtn.focus({ preventScroll:true });
    });
    toolButtons.set(entry.id, button);
    toolMenu.appendChild(button);
  });

  function closeToolMenu() {
    toolMenu.hidden = true;
    modeBtn.setAttribute('aria-expanded', 'false');
  }

  function closePalette() {
    palette.hidden = true;
    colorBtn.setAttribute('aria-expanded', 'false');
  }

  function closeMenus() {
    closeToolMenu();
    closePalette();
  }

  function openToolMenu() {
    closePalette();
    toolMenu.hidden = false;
    modeBtn.setAttribute('aria-expanded', 'true');
    const active = toolButtons.get(state.tool);
    if (active) requestAnimationFrame(() => active.focus({ preventScroll:true }));
  }

  function activeColorEntries() {
    return state.tool === 'highlighter' ? HIGHLIGHTER_COLORS.slice() : PEN_COLORS.slice();
  }

  function activeColorValue() {
    return state.tool === 'highlighter' ? state.highlighterColor : state.penColor;
  }

  function setSharedHighlighterColor(value, broadcast = true) {
    const next = String(value || '');
    if (!HIGHLIGHTER_COLORS.some((entry) => entry.value === next)) return false;
    state.highlighterColor = next;
    try { localStorage.setItem('mvip_highlighter_color', next); } catch (_) {}
    syncColorUi();
    if (broadcast) {
      document.dispatchEvent(new CustomEvent('mvip-highlighter-color-change', { detail:{ value:next } }));
    }
    return true;
  }

  document.addEventListener('mvip-highlighter-color-change', (event) => {
    setSharedHighlighterColor(event && event.detail && event.detail.value, false);
  });

  function currentEraserDefinition() {
    return ERASER_SIZES.find((entry) => entry.value === state.eraserWidth) || ERASER_SIZES[1];
  }

  function eraserButtonPreviewSize(width) {
    const definition = ERASER_SIZES.find((entry) => entry.value === Number(width));
    return definition ? Math.max(8, Math.min(22, definition.preview - 1)) : 15;
  }

  function buildPalette() {
    palette.replaceChildren();
    const eraserMode = state.tool === 'eraser';
    palette.classList.toggle('is-eraser-sizes', eraserMode);
    if (eraserMode) {
      palette.classList.remove('is-single-color');
      ERASER_SIZES.forEach((entry) => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'word-presentation-ink-size-option';
        button.setAttribute('role', 'menuitemradio');
        button.setAttribute('data-eraser-size', String(entry.value));
        button.setAttribute('aria-label', entry.name);
        button.setAttribute('aria-checked', entry.value === state.eraserWidth ? 'true' : 'false');
        button.title = `${entry.name} (${entry.value}px)`;
        button.innerHTML = `<span class="word-presentation-ink-size-square" aria-hidden="true" style="--wp-eraser-preview:${entry.preview}px"></span>`;
        button.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          state.eraserWidth = entry.value;
          try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
          syncColorUi();
          updateEraserCursorFromLastPoint();
          closePalette();
          modeBtn.focus({ preventScroll:true });
        });
        palette.appendChild(button);
      });
      return;
    }

    const entries = activeColorEntries();
    palette.classList.remove('is-eraser-sizes');
    palette.classList.toggle('is-single-color', entries.length === 1);
    entries.forEach((entry) => {
      const swatch = document.createElement('button');
      swatch.type = 'button';
      swatch.className = 'word-presentation-ink-swatch';
      swatch.setAttribute('role', 'menuitemradio');
      swatch.setAttribute('data-ink-color', entry.value);
      swatch.setAttribute('aria-label', entry.name);
      swatch.setAttribute('aria-checked', entry.value === activeColorValue() ? 'true' : 'false');
      swatch.title = entry.name;
      swatch.style.setProperty('--wp-ink-swatch', entry.value);
      swatch.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        if (state.tool === 'highlighter') {
          setSharedHighlighterColor(entry.value);
        } else if (state.tool !== 'eraser') {
          state.penColor = entry.value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
        }
        syncColorUi();
        closePalette();
        modeBtn.focus({ preventScroll:true });
      });
      palette.appendChild(swatch);
    });
  }

  function syncColorUi() {
    const eraserMode = state.tool === 'eraser';
    if (currentColor instanceof HTMLElement) currentColor.hidden = eraserMode;
    if (currentEraser instanceof HTMLElement) currentEraser.hidden = !eraserMode;

    if (eraserMode) {
      const definition = currentEraserDefinition();
      if (currentEraser instanceof HTMLElement) {
        const preview = eraserButtonPreviewSize(definition.value);
        currentEraser.style.setProperty('--wp-eraser-button-size', `${preview}px`);
      }
      colorBtn.setAttribute('aria-label', 'Chọn cỡ tẩy');
      colorBtn.title = `${definition.name} (${definition.value}px). Bấm để chọn 4 cỡ tẩy`;
      palette.querySelectorAll('.word-presentation-ink-size-option').forEach((button) => {
        button.setAttribute('aria-checked', Number(button.getAttribute('data-eraser-size')) === state.eraserWidth ? 'true' : 'false');
      });
      return;
    }

    const color = activeColorValue();
    if (currentColor instanceof HTMLElement) currentColor.style.background = color;
    if (state.tool === 'pen') {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút');
      colorBtn.title = 'Chọn màu bút: Đỏ, Tím, Vàng hoặc Xanh';
    } else if (state.tool === 'highlighter') {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút nhớ');
      colorBtn.title = 'Chọn màu bút nhớ: xanh hiện tại, vàng xanh, hồng hoặc tím';
    } else {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút vẽ');
      colorBtn.title = 'Chọn màu bút vẽ: Đỏ, Tím, Vàng hoặc Xanh';
    }
    palette.querySelectorAll('.word-presentation-ink-swatch').forEach((button) => {
      button.setAttribute('aria-checked', button.getAttribute('data-ink-color') === color ? 'true' : 'false');
    });
  }

  function openPalette() {
    closeToolMenu();
    buildPalette();
    palette.hidden = false;
    colorBtn.setAttribute('aria-expanded', 'true');
    syncColorUi();
    const first = palette.querySelector('.word-presentation-ink-swatch, .word-presentation-ink-size-option');
    if (first instanceof HTMLElement) requestAnimationFrame(() => first.focus({ preventScroll:true }));
  }

  function configureCanvasElement(target, cssWidth, cssHeight, dpr) {
    const pixelWidth = Math.max(1, Math.round(cssWidth * dpr));
    const pixelHeight = Math.max(1, Math.round(cssHeight * dpr));
    target.width = pixelWidth;
    target.height = pixelHeight;
    target.style.width = `${cssWidth}px`;
    target.style.height = `${cssHeight}px`;
  }

  function clearPixels(target) {
    const context = target.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(1, 0, 0, 1, 0, 0);
    context.clearRect(0, 0, target.width, target.height);
    context.restore();
  }

  function cssPoint(normalized) {
    return {
      x: Math.max(0, Math.min(state.cssWidth, Number(normalized && normalized.x) * state.cssWidth)),
      y: Math.max(0, Math.min(state.cssHeight, Number(normalized && normalized.y) * state.cssHeight))
    };
  }

  function strokeSettings(tool) {
    if (tool === 'eraser') return { width:state.eraserWidth, color:'#000000', alpha:1, composite:'destination-out' };
    if (tool === 'highlighter') return { width:22, color:state.highlighterColor, alpha:.32, composite:'source-over' };
    return { width:2.6, color:state.penColor, alpha:1, composite:'source-over' };
  }

  function drawStroke(context, stroke, startIndex = 0) {
    const points = Array.isArray(stroke && stroke.points) ? stroke.points : [];
    if (!context || !points.length) return;
    const settings = stroke.settings || strokeSettings(stroke.tool);
    const firstIndex = Math.max(0, Math.min(points.length - 1, Number(startIndex) || 0));
    const first = cssPoint(points[firstIndex]);
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.lineWidth = Number(settings.width) || 2.6;
    context.strokeStyle = settings.color || '#ef4444';
    context.globalAlpha = Number.isFinite(Number(settings.alpha)) ? Number(settings.alpha) : 1;
    context.globalCompositeOperation = settings.composite || 'source-over';
    context.beginPath();
    context.moveTo(first.x, first.y);
    if (points.length === 1 || firstIndex === points.length - 1) {
      context.lineTo(first.x + .01, first.y + .01);
    } else if (stroke.tool === 'pen' && points.length - firstIndex >= 3) {
      /* Bút viết dùng đường cong bậc hai qua các trung điểm để khử răng cưa
         do tần suất pointermove, nhưng các điểm bám thước thẳng vẫn thẳng hàng. */
      for (let index = firstIndex + 1; index < points.length - 1; index += 1) {
        const control = cssPoint(points[index]);
        const next = cssPoint(points[index + 1]);
        context.quadraticCurveTo(control.x, control.y, (control.x + next.x) / 2, (control.y + next.y) / 2);
      }
      const last = cssPoint(points[points.length - 1]);
      context.quadraticCurveTo(last.x, last.y, last.x, last.y);
    } else {
      for (let index = firstIndex + 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
    }
    context.stroke();
    context.restore();
  }

  function redrawPersistent() {
    clearPixels(canvas);
    const context = canvas.getContext('2d');
    if (!context) return;
    state.strokes.forEach((stroke) => drawStroke(context, stroke, 0));
    if (state.currentStroke) drawStroke(context, state.currentStroke, 0);
  }

  function stopLaserTimers() {
    if (state.laserFadeTimer) clearTimeout(state.laserFadeTimer);
    if (state.laserClearTimer) clearTimeout(state.laserClearTimer);
    state.laserFadeTimer = 0;
    state.laserClearTimer = 0;
    laserCanvas.classList.remove('is-fading');
    laserCanvas.style.opacity = '1';
  }

  function clearLaser() {
    stopLaserTimers();
    state.laserPoints = [];
    state.laserHoverPoint = null;
    clearPixels(laserCanvas);
  }

  function drawLaser() {
    clearPixels(laserCanvas);
    const points = state.drawing && state.tool === 'laser'
      ? state.laserPoints
      : (state.laserHoverPoint ? [state.laserHoverPoint] : []);
    if (!points.length) return;
    const context = laserCanvas.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.strokeStyle = '#ef4444';
    context.fillStyle = '#ef4444';
    context.lineWidth = 5.2;
    context.shadowColor = 'rgba(239,68,68,.92)';
    context.shadowBlur = 18;
    const first = cssPoint(points[0]);
    if (points.length > 1) {
      context.beginPath();
      context.moveTo(first.x, first.y);
      for (let index = 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
      context.stroke();
    }
    const last = cssPoint(points[points.length - 1]);
    context.beginPath();
    context.arc(last.x, last.y, 8.8, 0, Math.PI * 2);
    context.fill();
    context.restore();
  }

  function scheduleLaserFade(delay = 360) {
    stopLaserTimers();
    state.laserFadeTimer = setTimeout(() => {
      state.laserFadeTimer = 0;
      laserCanvas.classList.add('is-fading');
      state.laserClearTimer = setTimeout(() => {
        state.laserClearTimer = 0;
        state.laserPoints = [];
        state.laserHoverPoint = null;
        clearPixels(laserCanvas);
        laserCanvas.classList.remove('is-fading');
        laserCanvas.style.opacity = '1';
      }, 500);
    }, Math.max(0, Number(delay) || 0));
  }

  function positionCanvasForScroll() {
    const x = Math.max(0, Number(viewport.scrollLeft) || 0);
    const y = Math.max(0, Number(viewport.scrollTop) || 0);
    const transform = (x || y) ? `translate(${x}px, ${y}px)` : 'none';
    canvas.style.transform = transform;
    laserCanvas.style.transform = transform;
  }

  function resizeCanvas() {
    const rect = viewport.getBoundingClientRect();
    const cssWidth = Math.max(1, Math.round(rect.width));
    const cssHeight = Math.max(1, Math.round(rect.height));
    const dpr = Math.max(1, Math.min(3, Number(window.devicePixelRatio) || 1));
    const unchanged = state.cssWidth === cssWidth
      && state.cssHeight === cssHeight
      && state.dpr === dpr
      && canvas.width === Math.round(cssWidth * dpr)
      && canvas.height === Math.round(cssHeight * dpr);
    if (unchanged) {
      positionCanvasForScroll();
      return;
    }
    state.cssWidth = cssWidth;
    state.cssHeight = cssHeight;
    state.dpr = dpr;
    configureCanvasElement(canvas, cssWidth, cssHeight, dpr);
    configureCanvasElement(laserCanvas, cssWidth, cssHeight, dpr);
    redrawPersistent();
    drawLaser();
    positionCanvasForScroll();
  }

  function scheduleResize() {
    if (state.resizeFrame) cancelAnimationFrame(state.resizeFrame);
    state.resizeFrame = requestAnimationFrame(() => {
      state.resizeFrame = 0;
      resizeCanvas();
    });
  }

  function clearCanvas() {
    state.strokes = [];
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
    redrawPersistent();
    clearLaser();
  }

  function undoLastStroke() {
    if (state.drawing) finishStroke();
    if (!state.strokes.length) return false;
    state.strokes.pop();
    redrawPersistent();
    return true;
  }

  function currentToolDefinition() {
    return TOOL_DEFS.find((entry) => entry.id === state.tool) || TOOL_DEFS[0];
  }

  function syncToolUi() {
    const definition = currentToolDefinition();
    modeBtn.innerHTML = ICONS[state.tool] || ICONS.cursor;
    modeBtn.setAttribute('aria-label', `Công cụ hiện tại: ${definition.label}. Bấm để chọn công cụ`);
    modeBtn.title = `Công cụ hiện tại: ${definition.label}. Bấm để chọn công cụ`;
    toolButtons.forEach((button, id) => {
      button.setAttribute('aria-checked', id === state.tool ? 'true' : 'false');
    });
    const active = state.tool !== 'cursor';
    canvas.classList.toggle('is-active', active);
    canvas.setAttribute('data-tool', state.tool);
    presenter.classList.toggle('is-ink-active', active);
    colorBtn.hidden = false;
    syncColorUi();
    if (state.tool === 'eraser') updateEraserCursorFromLastPoint();
    else hideEraserCursor();
  }

  function setTool(value) {
    const nextTool = TOOL_IDS.has(String(value || '')) ? String(value) : 'cursor';
    if (state.drawing) finishStroke();
    if (nextTool !== 'cursor'
        && regionBtn instanceof HTMLElement
        // A completed region zoom stays open while annotating it.
        && regionBtn.classList.contains('is-selecting')) {
      state.suppressRegionReset = true;
      try { regionBtn.click(); } catch (_) {}
      state.suppressRegionReset = false;
    }
    if (state.tool === 'laser' && nextTool !== 'laser') clearLaser();
    if (nextTool !== 'eraser') hideEraserCursor();
    state.tool = nextTool;
    closeMenus();
    syncToolUi();
    if (nextTool !== 'cursor') resizeCanvas();
    return state.tool;
  }

  function hideEraserCursor() {
    eraserCursor.classList.remove('is-visible');
  }

  function updateEraserCursorPosition(clientX, clientY) {
    if (state.tool !== 'eraser' || !Number.isFinite(Number(clientX)) || !Number.isFinite(Number(clientY))) {
      hideEraserCursor();
      return;
    }
    const rect = viewport.getBoundingClientRect();
    const x = Number(clientX) - rect.left + Math.max(0, Number(viewport.scrollLeft) || 0);
    const y = Number(clientY) - rect.top + Math.max(0, Number(viewport.scrollTop) || 0);
    eraserCursor.style.width = `${state.eraserWidth}px`;
    eraserCursor.style.height = `${state.eraserWidth}px`;
    eraserCursor.style.left = `${x}px`;
    eraserCursor.style.top = `${y}px`;
    eraserCursor.classList.add('is-visible');
  }

  function updateEraserCursor(event) {
    if (!event) return;
    state.lastPointerClientX = Number(event.clientX);
    state.lastPointerClientY = Number(event.clientY);
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }

  function updateEraserCursorFromLastPoint() {
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }

  function normalizedPointFromEvent(event) {
    const rect = canvas.getBoundingClientRect();
    const width = Math.max(1, rect.width);
    const height = Math.max(1, rect.height);
    const rawPoint = {
      x:Math.max(0, Math.min(1, (Number(event.clientX) - rect.left) / width)),
      y:Math.max(0, Math.min(1, (Number(event.clientY) - rect.top) / height))
    };
    if (state.tool !== 'pen' && state.tool !== 'highlighter') return rawPoint;
    const geometry = window.mvipWordGeometryTool;
    if (!geometry || typeof geometry.snapInkPoint !== 'function') return rawPoint;
    try {
      const snapped = geometry.snapInkPoint(rawPoint, state.snapGuide);
      if (snapped && snapped.point) {
        if (!state.snapGuide && snapped.guide) state.snapGuide = snapped.guide;
        const rebased = snapped.guide && snapped.guide.rebaseStrokeStart;
        if (rebased && state.currentStroke && Array.isArray(state.currentStroke.points)) {
          state.currentStroke.points.forEach((_, index) => {
            state.currentStroke.points[index] = { x:rebased.x, y:rebased.y };
          });
          delete snapped.guide.rebaseStrokeStart;
        }
        return snapped.point;
      }
    } catch (_) {}
    return rawPoint;
  }

  function eventSamples(event) {
    try {
      const samples = typeof event.getCoalescedEvents === 'function' ? event.getCoalescedEvents() : null;
      return samples && samples.length ? Array.from(samples) : [event];
    } catch (_) {
      return [event];
    }
  }

  function beginStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor' || (event.pointerType === 'mouse' && event.button !== 0)) return;
    event.preventDefault();
    event.stopPropagation();
    resizeCanvas();
    state.drawing = true;
    state.pointerId = event.pointerId;
    state.snapGuide = null;
    try { canvas.setPointerCapture(event.pointerId); } catch (_) {}
    const point = normalizedPointFromEvent(event);
    if (state.tool === 'laser') {
      stopLaserTimers();
      state.laserHoverPoint = null;
      state.laserPoints = [point];
      drawLaser();
      return;
    }
    const settings = strokeSettings(state.tool);
    state.currentStroke = {
      tool:state.tool,
      settings:Object.assign({}, settings),
      points:[point]
    };
    const context = canvas.getContext('2d');
    if (context) drawStroke(context, state.currentStroke, 0);
  }

  function continueStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor') return;
    if (!state.drawing) {
      if (state.tool === 'laser') {
        stopLaserTimers();
        state.laserHoverPoint = normalizedPointFromEvent(event);
        drawLaser();
      }
      return;
    }
    if (event.pointerId !== state.pointerId) return;
    event.preventDefault();
    event.stopPropagation();
    const samples = eventSamples(event);
    if (state.tool === 'laser') {
      samples.forEach((sample) => state.laserPoints.push(normalizedPointFromEvent(sample)));
      drawLaser();
      return;
    }
    const stroke = state.currentStroke;
    if (!stroke) return;
    const oldLength = stroke.points.length;
    samples.forEach((sample) => stroke.points.push(normalizedPointFromEvent(sample)));
    if (stroke.tool === 'highlighter' || stroke.tool === 'pen') {
      /* Xóa và dựng lại toàn bộ nét hiện tại đúng một lần. Không vẽ chồng các đoạn
         nhỏ theo mật độ sự kiện, nên bút nhớ giữ độ mờ và bút viết luôn mượt. */
      redrawPersistent();
    } else {
      const context = canvas.getContext('2d');
      if (context) drawStroke(context, stroke, Math.max(0, oldLength - 1));
    }
  }

  function finishStroke(event) {
    if (!state.drawing) return;
    if (event && state.pointerId != null && event.pointerId !== state.pointerId) return;
    if (event) {
      event.preventDefault();
      event.stopPropagation();
      try { canvas.releasePointerCapture(event.pointerId); } catch (_) {}
    } else if (state.pointerId != null) {
      try { canvas.releasePointerCapture(state.pointerId); } catch (_) {}
    }
    if (state.tool === 'laser') {
      state.laserHoverPoint = null;
      scheduleLaserFade(380);
    } else if (state.currentStroke && state.currentStroke.points.length) {
      state.currentStroke.mvipUndoOrder = window.mvipDrawingHistory.stamp(viewport);
      state.strokes.push(state.currentStroke);
    }
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
  }

  function currentQuestionSignature() {
    const allView = presenter.classList.contains('is-all-view') ? 'all' : 'single';
    const progressText = String(progress && progress.textContent || '').trim();
    const firstLabel = card instanceof HTMLElement
      ? String((card.querySelector('.word-presentation-question-label') || {}).textContent || '').trim()
      : '';
    return `${allView}|${progressText}|${firstLabel}`;
  }

  function checkQuestionChange() {
    const signature = currentQuestionSignature();
    if (!signature) return;
    if (state.lastSignature && signature !== state.lastSignature) clearCanvas();
    state.lastSignature = signature;
    scheduleResize();
  }

  modeBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    if (toolMenu.hidden) openToolMenu();
    else closeToolMenu();
  });

  colorBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    if (palette.hidden) openPalette();
    else closePalette();
  });

  canvas.addEventListener('pointerdown', beginStroke);
  canvas.addEventListener('pointerenter', updateEraserCursor);
  canvas.addEventListener('pointermove', continueStroke);
  canvas.addEventListener('pointerup', finishStroke);
  canvas.addEventListener('pointercancel', finishStroke);
  canvas.addEventListener('lostpointercapture', () => finishStroke());
  canvas.addEventListener('pointerleave', () => {
    hideEraserCursor();
    if (state.tool === 'laser' && !state.drawing) scheduleLaserFade(0);
  });
  viewport.addEventListener('scroll', () => {
    positionCanvasForScroll();
    hideEraserCursor();
  }, { passive:true });

  if (regionBtn instanceof HTMLElement) {
    regionBtn.addEventListener('click', () => {
      if (!state.suppressRegionReset) setTool('cursor');
      closeMenus();
    }, true);
  }

  document.addEventListener('pointerdown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    if (!target || tools.contains(target)) return;
    closeMenus();
  }, true);

  document.addEventListener('keydown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    const editable = !!(target && target.closest('input, textarea, select, [contenteditable="true"]'));
    const undoShortcut = (event.ctrlKey || event.metaKey)
      && !event.altKey
      && !event.shiftKey
      && String(event.key || '').toLowerCase() === 'z';
    if (undoShortcut && !editable && !presenter.hidden && (document.getElementById('wordPresentationImageZoomModal') || {}).hidden !== false) {
      if (undoLastStroke()) {
        event.preventDefault();
        event.stopPropagation();
      }
      return;
    }
    if (event.key !== 'Escape' || (toolMenu.hidden && palette.hidden)) return;
    event.preventDefault();
    event.stopPropagation();
    closeMenus();
    modeBtn.focus({ preventScroll:true });
  }, true);

  const signatureObserver = typeof MutationObserver === 'function'
    ? new MutationObserver(() => requestAnimationFrame(checkQuestionChange))
    : null;
  if (signatureObserver) {
    if (progress instanceof HTMLElement) signatureObserver.observe(progress, { childList:true, subtree:true, characterData:true });
    if (card instanceof HTMLElement) signatureObserver.observe(card, { childList:true, subtree:true });
    signatureObserver.observe(presenter, { attributes:true, attributeFilter:['hidden', 'class'] });
  }

  if (typeof ResizeObserver === 'function') {
    const resizeObserver = new ResizeObserver(scheduleResize);
    resizeObserver.observe(viewport);
  }

  window.addEventListener('resize', scheduleResize);
  document.addEventListener('fullscreenchange', () => {
    [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay));
  });
  document.addEventListener('webkitfullscreenchange', () => {
    [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay));
  });

  const presenterObserver = typeof MutationObserver === 'function'
    ? new MutationObserver(() => {
        if (presenter.hidden) {
          setTool('cursor');
          closeMenus();
          clearCanvas();
          state.lastSignature = '';
        } else {
          scheduleResize();
          checkQuestionChange();
        }
      })
    : null;
  if (presenterObserver) presenterObserver.observe(presenter, { attributes:true, attributeFilter:['hidden'] });

  syncToolUi();
  resizeCanvas();
  state.lastSignature = currentQuestionSignature();
  window.mvipDrawingHistory.register(viewport, 'ink', {
    peek:() => Number(state.strokes[state.strokes.length - 1]?.mvipUndoOrder) || 0,
    undo:undoLastStroke,
    finish:() => { if (state.drawing) finishStroke(); }
  });
  window.mvipWordInkTool = {
    clear:clearCanvas,
    undo:() => window.mvipDrawingHistory.undo(viewport),
    activate:() => setTool('pen'),
    deactivate:() => setTool('cursor'),
    isActive:() => state.tool !== 'cursor',
    tool:(value) => {
      if (value == null) return state.tool;
      return setTool(value);
    },
    color:(value) => {
      if (value != null) {
        if (state.tool === 'highlighter' && HIGHLIGHTER_COLORS.some((entry) => entry.value === value)) {
          setSharedHighlighterColor(value);
        } else if (state.tool !== 'highlighter' && PEN_COLORS.some((entry) => entry.value === value)) {
          state.penColor = value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
          syncColorUi();
        }
      }
      return activeColorValue();
    },
    eraserSize:(value) => {
      const size = Number(value);
      if (ERASER_SIZES.some((entry) => entry.value === size)) {
        state.eraserWidth = size;
        try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
        syncColorUi();
        updateEraserCursorFromLastPoint();
      }
      return state.eraserWidth;
    }
  };
})();
</script>


<style id="cv7991-mvip-shared-ink-tools-20260820">
  /* Dùng câu hỏi của MVIP dùng cùng bộ công cụ với Trình chiếu Word, ở cả
     toàn màn hình và cửa sổ thu nhỏ. */
  .single-exam-toolbar {
    position:relative;
    z-index:45;
    overflow:visible !important;
  }
  .single-exam-toolbar-actions {
    overflow:visible !important;
  }
  .single-exam-toolbar .word-presentation-ink-tools {
    position:relative;
    flex:0 0 auto;
    display:inline-flex;
    align-items:center;
    gap:4px;
  }
  .single-exam-toolbar .word-presentation-ink-mode-btn,
  .single-exam-toolbar .word-presentation-ink-color-btn {
    width:36px;
    min-width:36px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid #94a3b8 !important;
    border-radius:8px;
    box-sizing:border-box;
  }
  .single-exam-toolbar .word-presentation-ink-mode-btn {
    color:#1d4ed8 !important;
    border-color:#2563eb !important;
    background:#eff6ff !important;
  }
  .single-exam-toolbar .word-presentation-ink-mode-btn:hover:not(:disabled),
  .single-exam-toolbar .word-presentation-ink-mode-btn[aria-expanded="true"] {
    color:#fff !important;
    border-color:#0f766e !important;
    background:#0f766e !important;
  }
  .single-exam-toolbar .word-presentation-ink-color-btn {
    border-color:#94a3b8 !important;
    background:#fff !important;
  }
  .single-exam-toolbar .word-presentation-ink-color-btn[hidden] { display:none !important; }
  .single-exam-toolbar .word-presentation-ink-color-btn[aria-expanded="true"] {
    border-color:#7c3aed !important;
    box-shadow:0 0 0 3px rgba(124,58,237,.15);
  }
  .single-exam-toolbar .word-presentation-ink-tool-option {
    width:100%;
    min-height:38px;
    height:auto;
    padding:7px 10px !important;
    display:flex;
    align-items:center;
    justify-content:flex-start;
    gap:10px;
    border:1px solid transparent !important;
    border-radius:9px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:13px;
    font-weight:800;
    text-align:left;
    white-space:nowrap;
  }
  .single-exam-toolbar .word-presentation-ink-tool-option:hover,
  .single-exam-toolbar .word-presentation-ink-tool-option[aria-checked="true"] {
    border-color:#93c5fd !important;
    background:#eff6ff !important;
    color:#1d4ed8 !important;
  }
  .single-exam-toolbar .word-presentation-ink-tool-option[aria-checked="true"]::after {
    content:'✓';
    margin-left:auto;
    color:#16a34a;
    font-size:15px;
    font-weight:900;
  }
  .single-exam-toolbar .word-presentation-ink-swatch {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    border:2px solid #e2e8f0 !important;
    border-radius:50% !important;
    background:var(--wp-ink-swatch, #ef4444) !important;
    box-shadow:inset 0 0 0 3px #fff;
  }
  .single-exam-toolbar .word-presentation-ink-swatch:hover,
  .single-exam-toolbar .word-presentation-ink-swatch[aria-checked="true"] {
    border-color:#0f172a !important;
    transform:scale(1.07);
  }
  .single-exam-toolbar .word-presentation-ink-size-option {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    display:flex;
    align-items:center;
    justify-content:center;
    border:2px solid #e2e8f0 !important;
    border-radius:8px !important;
    background:#fff !important;
  }
  .single-exam-toolbar .word-presentation-ink-size-option:hover,
  .single-exam-toolbar .word-presentation-ink-size-option[aria-checked="true"] {
    border-color:#0f172a !important;
    background:#eff6ff !important;
    transform:scale(1.05);
  }
  #singleExamSlide {
    position:relative !important;
    isolation:isolate;
  }
  #singleExamSlide > .word-presentation-ink-canvas {
    z-index:60;
    border-radius:inherit;
  }
  #singleExamSlide > .word-presentation-laser-canvas {
    z-index:61;
    pointer-events:none !important;
    cursor:none !important;
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    box-shadow:none !important;
  }
  #singleExamSlide > .word-presentation-ink-eraser-cursor { z-index:62; }
  #singleExamSlide > .word-presentation-ink-canvas.cv7991-presentation-image-frame {
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    cursor:inherit !important;
  }
  #singleExamPresenter.is-ink-active #singleExamSlide { cursor:crosshair; }

  /* Bảo đảm canvas vẫn nhận bút/tẩy/laze khi khung trình chiếu đang thu nhỏ;
     không phụ thuộc vào trạng thái :fullscreen. */
  #wordPresentationPresenter:not([hidden]) #wordPresentationViewport > .word-presentation-ink-canvas,
  #singleExamPresenter:not([hidden]) #singleExamSlide > .word-presentation-ink-canvas {
    display:block !important;
    visibility:visible !important;
  }
  @media (max-width:760px) {
    .single-exam-toolbar .word-presentation-ink-mode-btn,
    .single-exam-toolbar .word-presentation-ink-color-btn {
      width:32px;
      min-width:32px;
      height:32px;
      min-height:32px;
    }
    .single-exam-toolbar .word-presentation-ink-tool-menu { left:-4px; width:188px; }
    .single-exam-toolbar .word-presentation-ink-palette { left:34px; width:176px; }
    .single-exam-toolbar .word-presentation-ink-palette.is-single-color { width:58px; }
  }
</style>
<script id="cv7991-mvip-ink-tools-script-20260820">
(() => {
  'use strict';

  const presenter = document.getElementById('singleExamPresenter');
  const toolbarActions = presenter && presenter.querySelector('.single-exam-toolbar-actions');
  const surface = document.getElementById('singleExamSlide');
  const progress = document.getElementById('singleExamProgressText');
  const regionBtn = document.getElementById('singleExamRegionBtn');
  if (!(presenter instanceof HTMLElement)
      || !(toolbarActions instanceof HTMLElement)
      || !(surface instanceof HTMLElement)
      || document.getElementById('singleExamInkTools')) return;

  const ICONS = Object.freeze({
    cursor:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 3.5 18.2 13l-6.1 1.1 3.4 5.1-2.8 1.8-3.3-5.2L5 20V3.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    pen:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 20l4.2-1 10.4-10.4a2.1 2.1 0 0 0 0-3L18.4 5.4a2.1 2.1 0 0 0-3 0L5 15.8 4 20Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="m13.9 6.9 3.2 3.2M4 20h5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    eraser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m7.2 18.7-3.1-3.1a2 2 0 0 1 0-2.8l8.5-8.5a2 2 0 0 1 2.8 0l4.3 4.3a2 2 0 0 1 0 2.8l-7.3 7.3H7.2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m9.2 7.7 7.1 7.1M7.2 18.7H20" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    laser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 19 15.7 8.3l-3-3L2 16l3 3Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m13.4 10.6 2.8 2.8M17.5 4.5 20 2M19.5 8H23M16 1v3.5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    highlighter:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m5 14 8.8-8.8 5 5L10 19H5v-5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m11.5 7.5 5 5M3 22h18" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>'
  });
  const TOOL_DEFS = Object.freeze([
    { id:'cursor', label:'Con trỏ chuột' },
    { id:'pen', label:'Bút' },
    { id:'eraser', label:'Tẩy' },
    { id:'laser', label:'Bút laze' },
    { id:'highlighter', label:'Bút nhớ' }
  ]);
  const TOOL_IDS = new Set(TOOL_DEFS.map((entry) => entry.id));
  const PEN_COLORS = Object.freeze([
    { value:'#ef4444', name:'Đỏ' },
    { value:'#7c3aed', name:'Tím' },
    { value:'#facc15', name:'Vàng' },
    { value:'#2563eb', name:'Xanh' }
  ]);
  const HIGHLIGHTER_COLORS = Object.freeze([
    { value:'#A8FF00', name:'Xanh huỳnh quang hiện tại' },
    { value:'#D4FF00', name:'Vàng xanh huỳnh quang' },
    { value:'#FF4FA3', name:'Hồng' },
    { value:'#A855F7', name:'Tím' }
  ]);
  const ERASER_SIZES = Object.freeze([
    { value:52, preview:24, name:'Tẩy rất to' },
    { value:38, preview:19, name:'Tẩy to' },
    { value:26, preview:14, name:'Tẩy vừa' },
    { value:16, preview:9, name:'Tẩy nhỏ' }
  ]);

  const tools = document.createElement('div');
  tools.className = 'word-presentation-ink-tools';
  tools.id = 'singleExamInkTools';

  const modeBtn = document.createElement('button');
  modeBtn.type = 'button';
  modeBtn.className = 'word-presentation-ink-mode-btn';
  modeBtn.id = 'singleExamInkModeBtn';
  modeBtn.setAttribute('aria-haspopup', 'menu');
  modeBtn.setAttribute('aria-expanded', 'false');

  const colorBtn = document.createElement('button');
  colorBtn.type = 'button';
  colorBtn.className = 'word-presentation-ink-color-btn';
  colorBtn.id = 'singleExamInkColorBtn';
  colorBtn.setAttribute('aria-expanded', 'false');
  colorBtn.setAttribute('aria-haspopup', 'menu');
  colorBtn.innerHTML = '<span class="word-presentation-ink-current-color" aria-hidden="true"></span><span class="word-presentation-ink-current-eraser" aria-hidden="true" hidden></span>';
  colorBtn.hidden = false;

  const toolMenu = document.createElement('div');
  toolMenu.className = 'word-presentation-ink-tool-menu';
  toolMenu.id = 'singleExamInkToolMenu';
  toolMenu.hidden = true;
  toolMenu.setAttribute('role', 'menu');
  toolMenu.setAttribute('aria-label', 'Chọn công cụ trình chiếu MVIP');

  const palette = document.createElement('div');
  palette.className = 'word-presentation-ink-palette';
  palette.id = 'singleExamInkPalette';
  palette.hidden = true;
  palette.setAttribute('role', 'menu');
  palette.setAttribute('aria-label', 'Bảng chọn màu');

  tools.append(modeBtn, colorBtn, toolMenu, palette);
  toolbarActions.insertBefore(tools, toolbarActions.firstChild);

  const canvas = document.createElement('canvas');
  canvas.className = 'word-presentation-ink-canvas';
  canvas.id = 'singleExamInkCanvas';
  canvas.setAttribute('aria-hidden', 'true');

  const laserCanvas = document.createElement('canvas');
  laserCanvas.className = 'word-presentation-ink-canvas word-presentation-laser-canvas';
  laserCanvas.id = 'singleExamLaserCanvas';
  laserCanvas.setAttribute('aria-hidden', 'true');

  const eraserCursor = document.createElement('div');
  eraserCursor.className = 'word-presentation-ink-eraser-cursor';
  eraserCursor.id = 'singleExamInkEraserCursor';
  eraserCursor.setAttribute('aria-hidden', 'true');

  function ensureOverlayAttached() {
    [canvas, laserCanvas].forEach((target) => {
      target.classList.remove('cv7991-presentation-image-frame', 'word-presentation-direct-zoom');
      ['data-word-image-zoom', 'tabindex', 'role', 'aria-label', 'title'].forEach((name) => target.removeAttribute(name));
    });
    if (canvas.parentNode !== surface) surface.appendChild(canvas);
    if (laserCanvas.parentNode !== surface) surface.appendChild(laserCanvas);
    if (eraserCursor.parentNode !== surface) surface.appendChild(eraserCursor);
  }
  ensureOverlayAttached();

  const state = {
    tool:'cursor',
    penColor:'#ef4444',
    highlighterColor:'#A8FF00',
    eraserWidth:38,
    lastPointerClientX:null,
    lastPointerClientY:null,
    drawing:false,
    pointerId:null,
    snapGuide:null,
    currentStroke:null,
    strokes:[],
    laserPoints:[],
    laserHoverPoint:null,
    cssWidth:0,
    cssHeight:0,
    dpr:1,
    lastSignature:'',
    resizeFrame:0,
    mutationFrame:0,
    laserFadeTimer:0,
    laserClearTimer:0,
    suppressRegionReset:false
  };

  try {
    const stored = String(localStorage.getItem('mvip_word_pen_color')
      || localStorage.getItem('mvip_word_ink_color') || '').trim();
    if (PEN_COLORS.some((entry) => entry.value === stored)) state.penColor = stored;
    const storedHighlighter = String(localStorage.getItem('mvip_highlighter_color') || '').trim();
    if (HIGHLIGHTER_COLORS.some((entry) => entry.value === storedHighlighter)) state.highlighterColor = storedHighlighter;
    const storedEraser = Number(localStorage.getItem('mvip_word_eraser_size') || 0);
    if (ERASER_SIZES.some((entry) => entry.value === storedEraser)) state.eraserWidth = storedEraser;
  } catch (_) {}

  function setSharedHighlighterColor(value, broadcast = true) {
    const next = String(value || '');
    if (!HIGHLIGHTER_COLORS.some((entry) => entry.value === next)) return false;
    state.highlighterColor = next;
    try { localStorage.setItem('mvip_highlighter_color', next); } catch (_) {}
    syncColorUi();
    if (broadcast) {
      document.dispatchEvent(new CustomEvent('mvip-highlighter-color-change', { detail:{ value:next } }));
    }
    return true;
  }
  document.addEventListener('mvip-highlighter-color-change', (event) => {
    setSharedHighlighterColor(event && event.detail && event.detail.value, false);
  });

  const currentColor = colorBtn.querySelector('.word-presentation-ink-current-color');
  const currentEraser = colorBtn.querySelector('.word-presentation-ink-current-eraser');
  const toolButtons = new Map();

  TOOL_DEFS.forEach((entry) => {
    const button = document.createElement('button');
    button.type = 'button';
    button.className = 'word-presentation-ink-tool-option';
    button.setAttribute('role', 'menuitemradio');
    button.setAttribute('data-ink-tool', entry.id);
    button.setAttribute('aria-label', entry.label);
    button.innerHTML = `${ICONS[entry.id]}<span>${entry.label}</span>`;
    button.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      setTool(entry.id);
      modeBtn.focus({ preventScroll:true });
    });
    toolButtons.set(entry.id, button);
    toolMenu.appendChild(button);
  });

  function closeToolMenu() {
    toolMenu.hidden = true;
    modeBtn.setAttribute('aria-expanded', 'false');
  }
  function closePalette() {
    palette.hidden = true;
    colorBtn.setAttribute('aria-expanded', 'false');
  }
  function closeMenus() {
    closeToolMenu();
    closePalette();
  }
  function openToolMenu() {
    closePalette();
    toolMenu.hidden = false;
    modeBtn.setAttribute('aria-expanded', 'true');
    const active = toolButtons.get(state.tool);
    if (active) requestAnimationFrame(() => active.focus({ preventScroll:true }));
  }
  function activeColorEntries() {
    return state.tool === 'highlighter' ? HIGHLIGHTER_COLORS.slice() : PEN_COLORS.slice();
  }
  function activeColorValue() {
    return state.tool === 'highlighter' ? state.highlighterColor : state.penColor;
  }
  function currentEraserDefinition() {
    return ERASER_SIZES.find((entry) => entry.value === state.eraserWidth) || ERASER_SIZES[1];
  }
  function eraserButtonPreviewSize(width) {
    const definition = ERASER_SIZES.find((entry) => entry.value === Number(width));
    return definition ? Math.max(8, Math.min(22, definition.preview - 1)) : 15;
  }

  function buildPalette() {
    palette.replaceChildren();
    const eraserMode = state.tool === 'eraser';
    palette.classList.toggle('is-eraser-sizes', eraserMode);
    if (eraserMode) {
      palette.classList.remove('is-single-color');
      ERASER_SIZES.forEach((entry) => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'word-presentation-ink-size-option';
        button.setAttribute('role', 'menuitemradio');
        button.setAttribute('data-eraser-size', String(entry.value));
        button.setAttribute('aria-label', entry.name);
        button.setAttribute('aria-checked', entry.value === state.eraserWidth ? 'true' : 'false');
        button.title = `${entry.name} (${entry.value}px)`;
        button.innerHTML = `<span class="word-presentation-ink-size-square" aria-hidden="true" style="--wp-eraser-preview:${entry.preview}px"></span>`;
        button.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          state.eraserWidth = entry.value;
          try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
          syncColorUi();
          updateEraserCursorFromLastPoint();
          closePalette();
          modeBtn.focus({ preventScroll:true });
        });
        palette.appendChild(button);
      });
      return;
    }

    const entries = activeColorEntries();
    palette.classList.remove('is-eraser-sizes');
    palette.classList.toggle('is-single-color', entries.length === 1);
    entries.forEach((entry) => {
      const swatch = document.createElement('button');
      swatch.type = 'button';
      swatch.className = 'word-presentation-ink-swatch';
      swatch.setAttribute('role', 'menuitemradio');
      swatch.setAttribute('data-ink-color', entry.value);
      swatch.setAttribute('aria-label', entry.name);
      swatch.setAttribute('aria-checked', entry.value === activeColorValue() ? 'true' : 'false');
      swatch.title = entry.name;
      swatch.style.setProperty('--wp-ink-swatch', entry.value);
      swatch.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        if (state.tool === 'highlighter') {
          setSharedHighlighterColor(entry.value);
        } else if (state.tool !== 'eraser') {
          state.penColor = entry.value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
        }
        syncColorUi();
        closePalette();
        modeBtn.focus({ preventScroll:true });
      });
      palette.appendChild(swatch);
    });
  }

  function syncColorUi() {
    const eraserMode = state.tool === 'eraser';
    if (currentColor instanceof HTMLElement) currentColor.hidden = eraserMode;
    if (currentEraser instanceof HTMLElement) currentEraser.hidden = !eraserMode;
    if (eraserMode) {
      const definition = currentEraserDefinition();
      if (currentEraser instanceof HTMLElement) {
        currentEraser.style.setProperty('--wp-eraser-button-size', `${eraserButtonPreviewSize(definition.value)}px`);
      }
      colorBtn.setAttribute('aria-label', 'Chọn cỡ tẩy');
      colorBtn.title = `${definition.name} (${definition.value}px). Bấm để chọn 4 cỡ tẩy`;
      palette.querySelectorAll('.word-presentation-ink-size-option').forEach((button) => {
        button.setAttribute('aria-checked', Number(button.getAttribute('data-eraser-size')) === state.eraserWidth ? 'true' : 'false');
      });
      return;
    }
    const color = activeColorValue();
    if (currentColor instanceof HTMLElement) currentColor.style.background = color;
    if (state.tool === 'pen') {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút');
      colorBtn.title = 'Chọn màu bút: Đỏ, Tím, Vàng hoặc Xanh';
    } else if (state.tool === 'highlighter') {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút nhớ');
      colorBtn.title = 'Chọn màu bút nhớ: xanh hiện tại, vàng xanh, hồng hoặc tím';
    } else {
      colorBtn.setAttribute('aria-label', 'Chọn màu bút vẽ');
      colorBtn.title = 'Chọn màu bút vẽ: Đỏ, Tím, Vàng hoặc Xanh';
    }
    palette.querySelectorAll('.word-presentation-ink-swatch').forEach((button) => {
      button.setAttribute('aria-checked', button.getAttribute('data-ink-color') === color ? 'true' : 'false');
    });
  }

  function openPalette() {
    closeToolMenu();
    buildPalette();
    palette.hidden = false;
    colorBtn.setAttribute('aria-expanded', 'true');
    syncColorUi();
    const first = palette.querySelector('.word-presentation-ink-swatch, .word-presentation-ink-size-option');
    if (first instanceof HTMLElement) requestAnimationFrame(() => first.focus({ preventScroll:true }));
  }

  function configureCanvasElement(target, cssWidth, cssHeight, dpr) {
    target.width = Math.max(1, Math.round(cssWidth * dpr));
    target.height = Math.max(1, Math.round(cssHeight * dpr));
    target.style.width = `${cssWidth}px`;
    target.style.height = `${cssHeight}px`;
  }
  function clearPixels(target) {
    const context = target.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(1, 0, 0, 1, 0, 0);
    context.clearRect(0, 0, target.width, target.height);
    context.restore();
  }
  function cssPoint(normalized) {
    return {
      x:Math.max(0, Math.min(state.cssWidth, Number(normalized && normalized.x) * state.cssWidth)),
      y:Math.max(0, Math.min(state.cssHeight, Number(normalized && normalized.y) * state.cssHeight))
    };
  }
  function strokeSettings(tool) {
    if (tool === 'eraser') return { width:state.eraserWidth, color:'#000000', alpha:1, composite:'destination-out' };
    if (tool === 'highlighter') return { width:22, color:state.highlighterColor, alpha:.32, composite:'source-over' };
    return { width:2.6, color:state.penColor, alpha:1, composite:'source-over' };
  }
  function drawStroke(context, stroke, startIndex = 0) {
    const points = Array.isArray(stroke && stroke.points) ? stroke.points : [];
    if (!context || !points.length) return;
    const settings = stroke.settings || strokeSettings(stroke.tool);
    const firstIndex = Math.max(0, Math.min(points.length - 1, Number(startIndex) || 0));
    const first = cssPoint(points[firstIndex]);
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.lineWidth = Number(settings.width) || 2.6;
    context.strokeStyle = settings.color || '#ef4444';
    context.globalAlpha = Number.isFinite(Number(settings.alpha)) ? Number(settings.alpha) : 1;
    context.globalCompositeOperation = settings.composite || 'source-over';
    context.beginPath();
    context.moveTo(first.x, first.y);
    if (points.length === 1 || firstIndex === points.length - 1) context.lineTo(first.x + .01, first.y + .01);
    else if (stroke.tool === 'pen' && points.length - firstIndex >= 3) {
      for (let index = firstIndex + 1; index < points.length - 1; index += 1) {
        const control = cssPoint(points[index]);
        const next = cssPoint(points[index + 1]);
        context.quadraticCurveTo(control.x, control.y, (control.x + next.x) / 2, (control.y + next.y) / 2);
      }
      const last = cssPoint(points[points.length - 1]);
      context.quadraticCurveTo(last.x, last.y, last.x, last.y);
    } else {
      for (let index = firstIndex + 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
    }
    context.stroke();
    context.restore();
  }
  function redrawPersistent() {
    clearPixels(canvas);
    const context = canvas.getContext('2d');
    if (!context) return;
    state.strokes.forEach((stroke) => drawStroke(context, stroke, 0));
    if (state.currentStroke) drawStroke(context, state.currentStroke, 0);
  }
  function stopLaserTimers() {
    if (state.laserFadeTimer) clearTimeout(state.laserFadeTimer);
    if (state.laserClearTimer) clearTimeout(state.laserClearTimer);
    state.laserFadeTimer = 0;
    state.laserClearTimer = 0;
    laserCanvas.classList.remove('is-fading');
    laserCanvas.style.opacity = '1';
  }
  function clearLaser() {
    stopLaserTimers();
    state.laserPoints = [];
    state.laserHoverPoint = null;
    clearPixels(laserCanvas);
  }
  function drawLaser() {
    clearPixels(laserCanvas);
    const points = state.drawing && state.tool === 'laser'
      ? state.laserPoints
      : (state.laserHoverPoint ? [state.laserHoverPoint] : []);
    if (!points.length) return;
    const context = laserCanvas.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.strokeStyle = '#ef4444';
    context.fillStyle = '#ef4444';
    context.lineWidth = 5.2;
    context.shadowColor = 'rgba(239,68,68,.92)';
    context.shadowBlur = 18;
    const first = cssPoint(points[0]);
    if (points.length > 1) {
      context.beginPath();
      context.moveTo(first.x, first.y);
      for (let index = 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
      context.stroke();
    }
    const last = cssPoint(points[points.length - 1]);
    context.beginPath();
    context.arc(last.x, last.y, 8.8, 0, Math.PI * 2);
    context.fill();
    context.restore();
  }
  function scheduleLaserFade(delay = 360) {
    stopLaserTimers();
    state.laserFadeTimer = setTimeout(() => {
      state.laserFadeTimer = 0;
      laserCanvas.classList.add('is-fading');
      state.laserClearTimer = setTimeout(() => {
        state.laserClearTimer = 0;
        state.laserPoints = [];
        state.laserHoverPoint = null;
        clearPixels(laserCanvas);
        laserCanvas.classList.remove('is-fading');
        laserCanvas.style.opacity = '1';
      }, 500);
    }, Math.max(0, Number(delay) || 0));
  }
  function positionCanvasForScroll() {
    const x = Math.max(0, Number(surface.scrollLeft) || 0);
    const y = Math.max(0, Number(surface.scrollTop) || 0);
    const transform = (x || y) ? `translate(${x}px, ${y}px)` : 'none';
    canvas.style.transform = transform;
    laserCanvas.style.transform = transform;
  }
  function resizeCanvas() {
    ensureOverlayAttached();
    const rect = surface.getBoundingClientRect();
    const cssWidth = Math.max(1, Math.round(rect.width));
    const cssHeight = Math.max(1, Math.round(rect.height));
    const dpr = Math.max(1, Math.min(3, Number(window.devicePixelRatio) || 1));
    const unchanged = state.cssWidth === cssWidth
      && state.cssHeight === cssHeight
      && state.dpr === dpr
      && canvas.width === Math.round(cssWidth * dpr)
      && canvas.height === Math.round(cssHeight * dpr);
    if (unchanged) {
      positionCanvasForScroll();
      return;
    }
    state.cssWidth = cssWidth;
    state.cssHeight = cssHeight;
    state.dpr = dpr;
    configureCanvasElement(canvas, cssWidth, cssHeight, dpr);
    configureCanvasElement(laserCanvas, cssWidth, cssHeight, dpr);
    redrawPersistent();
    drawLaser();
    positionCanvasForScroll();
  }
  function scheduleResize() {
    if (state.resizeFrame) cancelAnimationFrame(state.resizeFrame);
    state.resizeFrame = requestAnimationFrame(() => {
      state.resizeFrame = 0;
      resizeCanvas();
    });
  }
  function clearCanvas() {
    state.strokes = [];
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
    redrawPersistent();
    clearLaser();
  }
  function undoLastStroke() {
    if (state.drawing) finishStroke();
    if (!state.strokes.length) return false;
    state.strokes.pop();
    redrawPersistent();
    return true;
  }
  function currentToolDefinition() {
    return TOOL_DEFS.find((entry) => entry.id === state.tool) || TOOL_DEFS[0];
  }
  function syncToolUi() {
    const definition = currentToolDefinition();
    modeBtn.innerHTML = ICONS[state.tool] || ICONS.cursor;
    modeBtn.setAttribute('aria-label', `Công cụ hiện tại: ${definition.label}. Bấm để chọn công cụ`);
    modeBtn.title = `Công cụ hiện tại: ${definition.label}. Bấm để chọn công cụ`;
    toolButtons.forEach((button, id) => button.setAttribute('aria-checked', id === state.tool ? 'true' : 'false'));
    const active = state.tool !== 'cursor';
    canvas.classList.toggle('is-active', active);
    canvas.setAttribute('data-tool', state.tool);
    presenter.classList.toggle('is-ink-active', active);
    colorBtn.hidden = false;
    syncColorUi();
    if (state.tool === 'eraser') updateEraserCursorFromLastPoint();
    else hideEraserCursor();
  }
  function setTool(value) {
    const nextTool = TOOL_IDS.has(String(value || '')) ? String(value) : 'cursor';
    if (state.drawing) finishStroke();
    if (nextTool !== 'cursor'
        && regionBtn instanceof HTMLElement
        // A completed region zoom stays open while annotating it.
        && regionBtn.classList.contains('is-selecting')) {
      state.suppressRegionReset = true;
      try { regionBtn.click(); } catch (_) {}
      state.suppressRegionReset = false;
    }
    if (state.tool === 'laser' && nextTool !== 'laser') clearLaser();
    if (nextTool !== 'eraser') hideEraserCursor();
    state.tool = nextTool;
    closeMenus();
    syncToolUi();
    if (nextTool !== 'cursor') resizeCanvas();
    return state.tool;
  }
  function hideEraserCursor() {
    eraserCursor.classList.remove('is-visible');
  }
  function updateEraserCursorPosition(clientX, clientY) {
    if (state.tool !== 'eraser' || !Number.isFinite(Number(clientX)) || !Number.isFinite(Number(clientY))) {
      hideEraserCursor();
      return;
    }
    const rect = surface.getBoundingClientRect();
    const x = Number(clientX) - rect.left + Math.max(0, Number(surface.scrollLeft) || 0);
    const y = Number(clientY) - rect.top + Math.max(0, Number(surface.scrollTop) || 0);
    eraserCursor.style.width = `${state.eraserWidth}px`;
    eraserCursor.style.height = `${state.eraserWidth}px`;
    eraserCursor.style.left = `${x}px`;
    eraserCursor.style.top = `${y}px`;
    eraserCursor.classList.add('is-visible');
  }
  function updateEraserCursor(event) {
    if (!event) return;
    state.lastPointerClientX = Number(event.clientX);
    state.lastPointerClientY = Number(event.clientY);
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }
  function updateEraserCursorFromLastPoint() {
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }
  function normalizedPointFromEvent(event) {
    const rect = canvas.getBoundingClientRect();
    const width = Math.max(1, rect.width);
    const height = Math.max(1, rect.height);
    const rawPoint = {
      x:Math.max(0, Math.min(1, (Number(event.clientX) - rect.left) / width)),
      y:Math.max(0, Math.min(1, (Number(event.clientY) - rect.top) / height))
    };
    if (state.tool !== 'pen' && state.tool !== 'highlighter') return rawPoint;
    const geometry = window.mvipSingleExamGeometryTool;
    if (!geometry || typeof geometry.snapInkPoint !== 'function') return rawPoint;
    try {
      const snapped = geometry.snapInkPoint(rawPoint, state.snapGuide);
      if (snapped && snapped.point) {
        if (!state.snapGuide && snapped.guide) state.snapGuide = snapped.guide;
        const rebased = snapped.guide && snapped.guide.rebaseStrokeStart;
        if (rebased && state.currentStroke && Array.isArray(state.currentStroke.points)) {
          state.currentStroke.points.forEach((_, index) => {
            state.currentStroke.points[index] = { x:rebased.x, y:rebased.y };
          });
          delete snapped.guide.rebaseStrokeStart;
        }
        return snapped.point;
      }
    } catch (_) {}
    return rawPoint;
  }
  function eventSamples(event) {
    try {
      const samples = typeof event.getCoalescedEvents === 'function' ? event.getCoalescedEvents() : null;
      return samples && samples.length ? Array.from(samples) : [event];
    } catch (_) {
      return [event];
    }
  }
  function beginStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor' || (event.pointerType === 'mouse' && event.button !== 0)) return;
    event.preventDefault();
    event.stopPropagation();
    resizeCanvas();
    state.drawing = true;
    state.pointerId = event.pointerId;
    state.snapGuide = null;
    try { canvas.setPointerCapture(event.pointerId); } catch (_) {}
    const point = normalizedPointFromEvent(event);
    if (state.tool === 'laser') {
      stopLaserTimers();
      state.laserHoverPoint = null;
      state.laserPoints = [point];
      drawLaser();
      return;
    }
    state.currentStroke = {
      tool:state.tool,
      settings:Object.assign({}, strokeSettings(state.tool)),
      points:[point]
    };
    const context = canvas.getContext('2d');
    if (context) drawStroke(context, state.currentStroke, 0);
  }
  function continueStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor') return;
    if (!state.drawing) {
      if (state.tool === 'laser') {
        stopLaserTimers();
        state.laserHoverPoint = normalizedPointFromEvent(event);
        drawLaser();
      }
      return;
    }
    if (event.pointerId !== state.pointerId) return;
    event.preventDefault();
    event.stopPropagation();
    const samples = eventSamples(event);
    if (state.tool === 'laser') {
      samples.forEach((sample) => state.laserPoints.push(normalizedPointFromEvent(sample)));
      drawLaser();
      return;
    }
    const stroke = state.currentStroke;
    if (!stroke) return;
    const oldLength = stroke.points.length;
    samples.forEach((sample) => stroke.points.push(normalizedPointFromEvent(sample)));
    if (stroke.tool === 'highlighter' || stroke.tool === 'pen') redrawPersistent();
    else {
      const context = canvas.getContext('2d');
      if (context) drawStroke(context, stroke, Math.max(0, oldLength - 1));
    }
  }
  function finishStroke(event) {
    if (!state.drawing) return;
    if (event && state.pointerId != null && event.pointerId !== state.pointerId) return;
    if (event) {
      event.preventDefault();
      event.stopPropagation();
      try { canvas.releasePointerCapture(event.pointerId); } catch (_) {}
    } else if (state.pointerId != null) {
      try { canvas.releasePointerCapture(state.pointerId); } catch (_) {}
    }
    if (state.tool === 'laser') {
      state.laserHoverPoint = null;
      scheduleLaserFade(380);
    } else if (state.currentStroke && state.currentStroke.points.length) {
      state.currentStroke.mvipUndoOrder = window.mvipDrawingHistory.stamp(surface);
      state.strokes.push(state.currentStroke);
    }
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
  }
  function currentQuestionSignature() {
    if (presenter.hidden) return '';
    const progressText = String(progress && progress.textContent || '').trim();
    const labelNode = surface.querySelector(
      '.word-presentation-question-label, .single-exam-question-prefix, .single-exam-word-question-label, .single-exam-end-box'
    );
    const label = String(labelNode && labelNode.textContent || '').replace(/\s+/g, ' ').trim();
    const image = surface.querySelector('.single-exam-captured-image');
    const alt = String(image && image.getAttribute('alt') || '').trim();
    return `${progressText}|${label}|${alt}`;
  }
  function checkQuestionChange() {
    ensureOverlayAttached();
    const signature = currentQuestionSignature();
    if (!signature) return;
    if (state.lastSignature && signature !== state.lastSignature) clearCanvas();
    state.lastSignature = signature;
    scheduleResize();
  }

  modeBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    if (toolMenu.hidden) openToolMenu();
    else closeToolMenu();
  });
  colorBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    if (palette.hidden) openPalette();
    else closePalette();
  });
  canvas.addEventListener('pointerdown', beginStroke);
  canvas.addEventListener('pointerenter', updateEraserCursor);
  canvas.addEventListener('pointermove', continueStroke);
  canvas.addEventListener('pointerup', finishStroke);
  canvas.addEventListener('pointercancel', finishStroke);
  canvas.addEventListener('lostpointercapture', () => finishStroke());
  canvas.addEventListener('pointerleave', () => {
    hideEraserCursor();
    if (state.tool === 'laser' && !state.drawing) scheduleLaserFade(0);
  });
  surface.addEventListener('scroll', () => {
    positionCanvasForScroll();
    hideEraserCursor();
  }, { passive:true });

  if (regionBtn instanceof HTMLElement) {
    regionBtn.addEventListener('click', () => {
      if (!state.suppressRegionReset) setTool('cursor');
      closeMenus();
    }, true);
  }
  document.addEventListener('pointerdown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    if (!target || tools.contains(target)) return;
    closeMenus();
  }, true);
  document.addEventListener('keydown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    const editable = !!(target && target.closest('input, textarea, select, [contenteditable="true"]'));
    const undoShortcut = (event.ctrlKey || event.metaKey)
      && !event.altKey
      && !event.shiftKey
      && String(event.key || '').toLowerCase() === 'z';
    if (undoShortcut && !editable && !presenter.hidden && (document.getElementById('wordPresentationImageZoomModal') || {}).hidden !== false) {
      if (undoLastStroke()) {
        event.preventDefault();
        event.stopPropagation();
      }
      return;
    }
    if (event.key !== 'Escape' || (toolMenu.hidden && palette.hidden)) return;
    event.preventDefault();
    event.stopPropagation();
    closeMenus();
    modeBtn.focus({ preventScroll:true });
  }, true);

  const slideObserver = typeof MutationObserver === 'function'
    ? new MutationObserver(() => {
        if (state.mutationFrame) return;
        state.mutationFrame = requestAnimationFrame(() => {
          state.mutationFrame = 0;
          ensureOverlayAttached();
          checkQuestionChange();
        });
      })
    : null;
  if (slideObserver) slideObserver.observe(surface, { childList:true, subtree:true });

  const progressObserver = typeof MutationObserver === 'function' && progress instanceof HTMLElement
    ? new MutationObserver(() => requestAnimationFrame(checkQuestionChange))
    : null;
  if (progressObserver) progressObserver.observe(progress, { childList:true, subtree:true, characterData:true });

  if (typeof ResizeObserver === 'function') {
    const resizeObserver = new ResizeObserver(scheduleResize);
    resizeObserver.observe(surface);
  }
  window.addEventListener('resize', scheduleResize);
  document.addEventListener('fullscreenchange', () => {
    [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay));
  });
  document.addEventListener('webkitfullscreenchange', () => {
    [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay));
  });

  const presenterObserver = typeof MutationObserver === 'function'
    ? new MutationObserver(() => {
        if (presenter.hidden) {
          setTool('cursor');
          closeMenus();
          clearCanvas();
          state.lastSignature = '';
        } else {
          ensureOverlayAttached();
          scheduleResize();
          checkQuestionChange();
        }
      })
    : null;
  if (presenterObserver) presenterObserver.observe(presenter, { attributes:true, attributeFilter:['hidden', 'class'] });

  syncToolUi();
  resizeCanvas();
  state.lastSignature = currentQuestionSignature();
  window.mvipDrawingHistory.register(surface, 'ink', {
    peek:() => Number(state.strokes[state.strokes.length - 1]?.mvipUndoOrder) || 0,
    undo:undoLastStroke,
    finish:() => { if (state.drawing) finishStroke(); }
  });
  window.mvipSingleExamInkTool = {
    clear:clearCanvas,
    undo:() => window.mvipDrawingHistory.undo(surface),
    activate:() => setTool('pen'),
    deactivate:() => setTool('cursor'),
    isActive:() => state.tool !== 'cursor',
    tool:(value) => value == null ? state.tool : setTool(value),
    color:(value) => {
      if (value != null) {
        if (state.tool === 'highlighter' && HIGHLIGHTER_COLORS.some((entry) => entry.value === value)) {
          setSharedHighlighterColor(value);
        } else if (state.tool !== 'highlighter' && PEN_COLORS.some((entry) => entry.value === value)) {
          state.penColor = value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
          syncColorUi();
        }
      }
      return activeColorValue();
    },
    eraserSize:(value) => {
      const size = Number(value);
      if (ERASER_SIZES.some((entry) => entry.value === size)) {
        state.eraserWidth = size;
        try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
        syncColorUi();
        updateEraserCursorFromLastPoint();
      }
      return state.eraserWidth;
    }
  };
})();
</script>


<style id="cv7991-magic-wheel-style-20260820">
  .word-presentation-magic-wheel-btn {
    width:40px;
    min-width:40px;
    height:34px;
    min-height:34px;
    padding:0 !important;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid #f59e0b !important;
    border-radius:9px !important;
    color:#9a3412 !important;
    background:linear-gradient(180deg,#fff7ed,#ffedd5) !important;
    box-shadow:0 1px 3px rgba(154,52,18,.16);
  }
  .word-presentation-magic-wheel-btn[hidden] { display:none !important; }
  .word-presentation-magic-wheel-btn:hover:not(:disabled) {
    color:#fff !important;
    border-color:#ea580c !important;
    background:linear-gradient(180deg,#fb923c,#ea580c) !important;
    transform:translateY(-1px);
  }
  .word-presentation-magic-wheel-btn:disabled {
    opacity:.48;
    cursor:not-allowed;
    transform:none;
  }
  .word-presentation-magic-wheel-btn svg {
    width:25px;
    height:25px;
    display:block;
    pointer-events:none;
  }

  .cv7991-magic-wheel-modal[hidden] { display:none !important; }
  .cv7991-magic-wheel-modal {
    position:fixed;
    inset:0;
    z-index:2147483646;
    display:flex;
    align-items:center;
    justify-content:center;
    box-sizing:border-box;
    padding:clamp(10px,2vw,28px);
    font-family:inherit;
    color:#0f172a;
  }
  .cv7991-magic-wheel-backdrop {
    position:absolute;
    inset:0;
    background:rgba(2,6,23,.76);
    backdrop-filter:blur(5px);
  }
  .cv7991-magic-wheel-dialog {
    position:relative;
    z-index:1;
    width:min(1120px,calc(100vw - 24px));
    max-height:calc(100vh - 24px);
    overflow:auto;
    box-sizing:border-box;
    border:2px solid rgba(255,255,255,.7);
    border-radius:24px;
    background:
      radial-gradient(circle at 12% 8%,rgba(253,224,71,.28),transparent 27%),
      radial-gradient(circle at 88% 88%,rgba(59,130,246,.20),transparent 28%),
      linear-gradient(145deg,#fff 0%,#fff7ed 48%,#eff6ff 100%);
    box-shadow:0 32px 90px rgba(0,0,0,.52);
  }
  .cv7991-magic-wheel-head {
    position:sticky;
    top:0;
    z-index:4;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:14px 18px;
    border-bottom:1px solid #fed7aa;
    background:rgba(255,255,255,.95);
    backdrop-filter:blur(8px);
  }
  .cv7991-magic-wheel-head-text { min-width:0; }
  .cv7991-magic-wheel-head h3 {
    margin:0;
    color:#9a3412;
    font-size:clamp(22px,2.2vw,34px);
    line-height:1.1;
    font-weight:950;
  }
  .cv7991-magic-wheel-class {
    margin-top:4px;
    color:#475569;
    font-size:14px;
    font-weight:800;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .cv7991-magic-wheel-close {
    flex:0 0 auto;
    min-width:76px;
    min-height:38px;
    border:1px solid #ef4444;
    border-radius:11px;
    color:#b91c1c;
    background:#fff;
    font-weight:900;
    cursor:pointer;
  }
  .cv7991-magic-wheel-close:hover:not(:disabled) { background:#fef2f2; }
  .cv7991-magic-wheel-close:disabled { opacity:.45; cursor:not-allowed; }

  .cv7991-magic-wheel-body {
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(260px,340px);
    gap:clamp(14px,2vw,28px);
    align-items:center;
    padding:clamp(14px,2.2vw,28px);
  }
  .cv7991-magic-wheel-main {
    min-width:0;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:14px;
  }
  .cv7991-magic-wheel-play-area {
    display:grid; grid-template-columns:44px minmax(0,1fr);
    gap:12px; width:100%; align-items:center; justify-items:center;
  }
  .cv7991-magic-wheel-volume {
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    gap:10px; width:44px; color:#1d4ed8;
  }
  .cv7991-magic-wheel-volume-label {
    display:flex; align-items:center; justify-content:center; cursor:pointer;
  }
  .cv7991-magic-wheel-volume-label svg { width:24px; height:24px; }
  .cv7991-magic-wheel-volume-slider {
    writing-mode:vertical-lr; direction:rtl; appearance:auto;
    width:32px; height:clamp(140px, 42vh, 340px); margin:0;
    accent-color:#2563eb; cursor:pointer; touch-action:none;
  }
  .cv7991-magic-wheel-volume-slider:focus-visible {
    outline:3px solid #93c5fd; outline-offset:3px; border-radius:8px;
  }
  .cv7991-magic-wheel-volume-value {
    color:#1d4ed8; font:700 13px/1.2 Arial,sans-serif;
    font-variant-numeric:tabular-nums; white-space:nowrap;
  }
  .cv7991-magic-wheel-stage {
    --wheel-size:min(68vh,68vw,670px);
    position:relative;
    width:min(var(--wheel-size),calc(100vh - 190px));
    height:auto;
    max-width:100%;
    max-height:none;
    aspect-ratio:1;
    filter:drop-shadow(0 18px 24px rgba(15,23,42,.25));
  }
  .cv7991-magic-wheel-canvas {
    position:absolute; inset:0;
    display:block;
    width:100%;
    height:100%;
    border-radius:50%;
    background:#fff;
  }
  /* Keep the rotating canvas corners inside a fixed viewport. Otherwise its
     transformed square enlarges the dialog's scroll area at diagonal angles,
     repeatedly showing/hiding a scrollbar and shifting the entire wheel. */
  .cv7991-magic-wheel-face {
    position:absolute;
    inset:0;
    overflow:hidden;
    border-radius:50%;
    contain:paint;
  }
  .cv7991-magic-wheel-rotor { background:transparent; }
  .cv7991-magic-wheel-modal.is-spinning .cv7991-magic-wheel-rotor { will-change:transform; }
  .cv7991-magic-wheel-pointer {
    position:absolute;
    left:50%;
    top:-4px;
    z-index:3;
    width:0;
    height:0;
    border-left:18px solid transparent;
    border-right:18px solid transparent;
    border-top:46px solid #dc2626;
    border-bottom:0;
    transform:translate(-50%,-4%);
    filter:drop-shadow(0 4px 3px rgba(0,0,0,.35));
  }
  .cv7991-magic-wheel-pointer::after {
    content:'';
    position:absolute;
    left:-8px;
    top:-8px;
    width:16px;
    height:16px;
    border-radius:50%;
    background:#fff;
    box-shadow:0 0 0 3px #991b1b;
  }
  .cv7991-magic-wheel-hub {
    position:absolute;
    left:50%;
    top:50%;
    z-index:2;
    width:clamp(58px,10%,86px);
    aspect-ratio:1;
    display:flex;
    align-items:center;
    justify-content:center;
    border:5px solid #f59e0b;
    border-radius:50%;
    color:#7c2d12;
    background:radial-gradient(circle at 35% 30%,#fff7ed,#fbbf24 62%,#d97706);
    box-shadow:0 7px 16px rgba(120,53,15,.38),inset 0 2px 3px rgba(255,255,255,.8);
    transform:translate(-50%,-50%);
    font-size:clamp(11px,1.4vw,18px);
    font-weight:950;
    letter-spacing:.04em;
  }
  .cv7991-magic-wheel-spin {
    min-width:min(270px,85%);
    min-height:54px;
    padding:0 28px;
    border:0;
    border-radius:999px;
    color:#fff;
    background:linear-gradient(180deg,#fb923c,#ea580c);
    box-shadow:0 8px 0 #9a3412,0 14px 24px rgba(154,52,18,.28);
    font-size:24px;
    font-weight:950;
    letter-spacing:.08em;
    cursor:pointer;
    transition:transform .12s ease,box-shadow .12s ease;
  }
  .cv7991-magic-wheel-spin:hover:not(:disabled) { transform:translateY(-2px); }
  .cv7991-magic-wheel-spin:active:not(:disabled) {
    transform:translateY(5px);
    box-shadow:0 3px 0 #9a3412,0 8px 16px rgba(154,52,18,.22);
  }
  .cv7991-magic-wheel-spin:disabled { opacity:.62; cursor:wait; }
  .cv7991-magic-wheel-auto {
    width:min(520px,94%);
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    padding:9px 12px;
    border:1px solid #fdba74;
    border-radius:12px;
    background:rgba(255,247,237,.9);
    color:#7c2d12;
    font-size:14px;
    line-height:1.3;
    font-weight:850;
    text-align:left;
    cursor:pointer;
    user-select:none;
  }
  .cv7991-magic-wheel-auto:hover { background:#fff7ed; border-color:#f97316; }
  .cv7991-magic-wheel-auto input {
    width:20px;
    height:20px;
    flex:0 0 auto;
    margin:0;
    accent-color:#ea580c;
    cursor:pointer;
  }
  .cv7991-magic-wheel-auto span { min-width:0; }

  .cv7991-wheel-answer-timer[hidden] { display:none !important; }
  .cv7991-wheel-answer-timer {
    position:fixed;
    left:50%;
    top:84px;
    transform:translateX(-50%);
    z-index:2147483000;
    display:flex;
    align-items:center;
    gap:10px;
    min-width:210px;
    padding:8px 14px;
    border:2px solid #2563eb;
    border-radius:14px;
    background:rgba(255,255,255,.97);
    color:#0f172a;
    box-shadow:0 10px 30px rgba(15,23,42,.22);
    pointer-events:none;
    user-select:none;
  }
  .cv7991-wheel-answer-timer-label {
    font-size:14px;
    font-weight:800;
    white-space:nowrap;
  }
  .cv7991-wheel-answer-timer-value {
    display:flex;
    align-items:center;
    justify-content:center;
    width:48px;
    height:48px;
    flex:0 0 48px;
    border-radius:50%;
    background:#eff6ff;
    color:#1d4ed8;
    font-size:27px;
    line-height:1;
    font-weight:900;
    font-variant-numeric:tabular-nums;
  }
  .cv7991-wheel-answer-timer.is-ending .cv7991-wheel-answer-timer-value {
    background:#fff7ed;
    color:#c2410c;
  }

  .cv7991-magic-wheel-result-panel {
    min-height:280px;
    box-sizing:border-box;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:12px;
    padding:24px 18px;
    border:2px solid #bfdbfe;
    border-radius:22px;
    background:rgba(255,255,255,.88);
    box-shadow:0 14px 34px rgba(30,64,175,.13);
    text-align:center;
  }
  .cv7991-magic-wheel-result-caption {
    color:#64748b;
    font-size:15px;
    font-weight:900;
    text-transform:uppercase;
    letter-spacing:.08em;
  }
  .cv7991-magic-wheel-result-number {
    min-width:120px;
    min-height:96px;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:2px 18px 7px;
    border:4px solid #f59e0b;
    border-radius:22px;
    color:#1d4ed8;
    background:linear-gradient(180deg,#fff,#fef3c7);
    box-shadow:0 7px 0 #d97706;
    font-size:clamp(54px,7vw,92px);
    line-height:1;
    font-weight:950;
  }
  .cv7991-magic-wheel-result-name {
    width:100%;
    color:#0f172a;
    font-size:clamp(24px,2.8vw,38px);
    line-height:1.2;
    font-weight:950;
    overflow-wrap:anywhere;
  }
  .cv7991-magic-wheel-result-note {
    color:#475569;
    font-size:15px;
    line-height:1.45;
    font-weight:700;
  }
  .cv7991-magic-wheel-modal.is-spinning .cv7991-magic-wheel-result-number {
    color:#94a3b8;
    border-color:#cbd5e1;
    background:#f8fafc;
    box-shadow:0 7px 0 #94a3b8;
  }
  .cv7991-magic-wheel-modal.has-result .cv7991-magic-wheel-result-panel {
    animation:cv7991-wheel-result-pop .58s cubic-bezier(.18,.84,.3,1.24);
  }
  @keyframes cv7991-wheel-result-pop {
    0% { transform:scale(.82); opacity:.25; }
    72% { transform:scale(1.045); opacity:1; }
    100% { transform:scale(1); opacity:1; }
  }
  @media (max-width:820px) {
    .cv7991-magic-wheel-dialog { border-radius:17px; }
    .cv7991-magic-wheel-body { grid-template-columns:1fr; }
    .cv7991-magic-wheel-stage {
      --wheel-size:min(68vw,54vh,520px);
      max-height:none;
    }
    .cv7991-magic-wheel-result-panel { min-height:190px; }
    .cv7991-magic-wheel-result-number { min-height:75px; font-size:54px; }
  }
  @media (max-width:560px) {
    .word-presentation-magic-wheel-btn { width:34px; min-width:34px; height:32px; min-height:32px; }
    .word-presentation-magic-wheel-btn svg { width:22px; height:22px; }
    .cv7991-magic-wheel-modal { padding:5px; }
    .cv7991-magic-wheel-dialog { width:calc(100vw - 10px); max-height:calc(100vh - 10px); }
    .cv7991-magic-wheel-head { padding:10px 11px; }
    .cv7991-magic-wheel-close { min-width:60px; min-height:34px; }
    .cv7991-magic-wheel-body { padding:10px; gap:10px; }
    .cv7991-magic-wheel-stage { --wheel-size:min(89vw,49vh,460px); }
    .cv7991-magic-wheel-spin { min-height:48px; font-size:20px; }
    .cv7991-magic-wheel-result-panel { min-height:160px; padding:14px 10px; }
  }


  /* ===== Điều chỉnh bố cục desktop cho dễ nhìn thấy 2 ô tích ===== */
  @media (min-width: 900px) {
    .cv7991-magic-wheel-dialog {
      width:min(1280px,calc(100vw - 16px));
      max-height:calc(100vh - 16px);
    }

    .cv7991-magic-wheel-body {
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:28px;
      padding:18px 20px 22px;
    }

    .cv7991-magic-wheel-main {
      position:relative;
      flex:1 1 auto;
      min-width:0;
      align-items:flex-start;
      padding-right:300px;
      padding-bottom:12px;
    }

    .cv7991-magic-wheel-play-area {
      width:fit-content;
      max-width:100%;
    }

    .cv7991-magic-wheel-stage {
      --wheel-size:min(64vw,72vh,760px);
    }

    .cv7991-magic-wheel-spin {
      align-self:flex-start;
      margin-left:165px;
      width:240px;
      max-width:calc(100% - 300px);
    }

    .cv7991-magic-wheel-main > .cv7991-magic-wheel-auto {
      position:absolute;
      right:6px;
      width:270px;
      min-height:42px;
      box-sizing:border-box;
      box-shadow:0 6px 18px rgba(148, 163, 184, .18);
    }

    .cv7991-magic-wheel-main > .cv7991-magic-wheel-auto[for="cv7991MagicWheelAutoSpin"] {
      top:68%;
    }

    .cv7991-magic-wheel-main > .cv7991-magic-wheel-auto[for="cv7991MagicWheelAnswerTimerEnabled"] {
      top:calc(68% + 54px);
    }

    .cv7991-magic-wheel-result-panel {
      flex:0 0 300px;
      width:300px;
      align-self:center;
      margin-right:6px;
    }
  }


  /* ===== Bố cục cân đối: kết quả trên, tùy chọn dưới ở cột phải ===== */
  .cv7991-magic-wheel-side {
    min-width:0;
    display:flex;
    flex-direction:column;
    gap:16px;
  }

  .cv7991-magic-wheel-options {
    width:100%;
    display:flex;
    flex-direction:column;
    gap:10px;
  }

  @media (min-width: 900px) {
    .cv7991-magic-wheel-dialog {
      width:min(1320px,calc(100vw - 14px));
      max-height:calc(100vh - 14px);
    }

    .cv7991-magic-wheel-body {
      display:grid;
      grid-template-columns:minmax(0,1fr) minmax(390px,440px);
      gap:28px;
      align-items:start;
      padding:18px 22px 22px;
    }

    .cv7991-magic-wheel-main {
      position:static;
      min-width:0;
      padding:0;
      align-items:center;
      gap:14px;
    }

    .cv7991-magic-wheel-play-area {
      width:100%;
      max-width:100%;
      display:grid;
      grid-template-columns:44px minmax(0,1fr);
      gap:12px;
      align-items:center;
      justify-items:center;
    }

    .cv7991-magic-wheel-stage {
      --wheel-size:min(66vw,72vh,760px);
      width:min(var(--wheel-size),calc(100vh - 176px));
    }

    .cv7991-magic-wheel-spin {
      align-self:center;
      margin:0;
      width:240px;
      max-width:85%;
    }

    .cv7991-magic-wheel-side {
      width:100%;
      align-self:start;
      padding-top:18px;
    }

    .cv7991-magic-wheel-result-panel {
      width:100%;
      min-height:300px;
      margin:0;
      padding:24px 22px;
      align-self:stretch;
    }

    .cv7991-magic-wheel-options {
      width:100%;
      gap:10px;
    }

    .cv7991-magic-wheel-options .cv7991-magic-wheel-auto {
      position:static !important;
      inset:auto !important;
      width:100% !important;
      min-height:46px;
      margin:0 !important;
      padding:10px 14px;
      justify-content:flex-start;
      box-shadow:0 5px 15px rgba(148,163,184,.16);
    }

    .cv7991-magic-wheel-options .cv7991-magic-wheel-auto span {
      white-space:nowrap;
      overflow:visible;
      text-overflow:clip;
      font-size:13.5px;
      line-height:1.2;
    }
  }

  @media (max-width: 899px) {
    .cv7991-magic-wheel-side {
      width:100%;
    }

    .cv7991-magic-wheel-options .cv7991-magic-wheel-auto {
      position:static !important;
      width:min(520px,94%) !important;
      margin-left:auto !important;
      margin-right:auto !important;
    }

    .cv7991-magic-wheel-options .cv7991-magic-wheel-auto span {
      white-space:normal;
    }
  }

</style>
<script id="cv7991-magic-wheel-script-20260820">
(() => {
  'use strict';

  const presenter = document.getElementById('wordPresentationPresenter');
  const toolbarActions = presenter && presenter.querySelector('.word-presentation-actions');
  const classSelect = document.getElementById('wordPresentationClassSelect');
  const singlePresenter = document.getElementById('singleExamPresenter');
  const singleToolbarActions = singlePresenter && singlePresenter.querySelector('.single-exam-toolbar-actions');
  const singleClassSelect = document.getElementById('singleExamClassSelect');
  const compactClassSubjectSelect = document.getElementById('compactClassSubjectSelect');
  const mainClassSubjectSelect = document.getElementById('classSubjectSelect');
  const regularTestStartBtn = document.getElementById('regularTestStartBtn');
  if (!(presenter instanceof HTMLElement)
      || !(toolbarActions instanceof HTMLElement)
      || !(classSelect instanceof HTMLSelectElement)
      || !(singlePresenter instanceof HTMLElement)
      || !(singleToolbarActions instanceof HTMLElement)
      || !(regularTestStartBtn instanceof HTMLButtonElement)
      || document.getElementById('cv7991MagicWheelBtn')
      || document.getElementById('cv7991SingleMagicWheelBtn')
      || document.getElementById('cv7991DashboardMagicWheelBtn')) return;

  const TAU = Math.PI * 2;
  const wheelIcon = '<svg aria-hidden="true" viewBox="0 0 48 48" fill="none"><circle cx="24" cy="25" r="18" fill="#f8fafc" stroke="currentColor" stroke-width="2.5"/><path d="M24 7v18L39.6 16M24 25 8.4 16M24 25l15.6 9M24 25 8.4 34" stroke="currentColor" stroke-width="2"/><path d="M24 2 19.5 9h9L24 2Z" fill="#ef4444" stroke="#991b1b" stroke-width="1"/><circle cx="24" cy="25" r="4.5" fill="#f59e0b" stroke="#9a3412" stroke-width="1.5"/></svg>';
  const wheelButton = document.createElement('button');
  wheelButton.type = 'button';
  wheelButton.id = 'cv7991MagicWheelBtn';
  wheelButton.className = 'word-presentation-magic-wheel-btn';
  wheelButton.hidden = true;
  wheelButton.disabled = true;
  wheelButton.setAttribute('aria-label', 'Mở trò chơi Vòng quay may mắn');
  wheelButton.title = 'Vòng quay may mắn';
  wheelButton.innerHTML = wheelIcon;
  const inkTools = document.getElementById('wordPresentationInkTools');
  toolbarActions.insertBefore(wheelButton, inkTools instanceof Node ? inkTools : toolbarActions.firstChild);

  const singleWheelButton = document.createElement('button');
  singleWheelButton.type = 'button';
  singleWheelButton.id = 'cv7991SingleMagicWheelBtn';
  singleWheelButton.className = 'word-presentation-magic-wheel-btn';
  singleWheelButton.hidden = true;
  singleWheelButton.disabled = true;
  singleWheelButton.setAttribute('aria-label', 'Mở trò chơi Vòng quay may mắn');
  singleWheelButton.title = 'Vòng quay may mắn';
  singleWheelButton.innerHTML = wheelIcon;
  const singleInkTools = document.getElementById('singleExamInkTools');
  singleToolbarActions.insertBefore(singleWheelButton, singleInkTools instanceof Node ? singleInkTools : singleToolbarActions.firstChild);

  const dashboardWheelButton = document.createElement('button');
  dashboardWheelButton.type = 'button';
  dashboardWheelButton.id = 'cv7991DashboardMagicWheelBtn';
  dashboardWheelButton.className = 'word-presentation-magic-wheel-btn regular-test-magic-wheel-btn';
  dashboardWheelButton.hidden = true;
  dashboardWheelButton.disabled = true;
  dashboardWheelButton.setAttribute('aria-label', 'Mở Vòng quay may mắn');
  dashboardWheelButton.title = 'Vòng quay may mắn';
  dashboardWheelButton.innerHTML = wheelIcon;
  const compactClassWrap = compactClassSubjectSelect instanceof HTMLSelectElement
    ? compactClassSubjectSelect.closest('.compact-class-wrap')
    : null;
  if (compactClassWrap instanceof HTMLElement) compactClassWrap.insertAdjacentElement('afterend', dashboardWheelButton);
  else regularTestStartBtn.insertAdjacentElement('afterend', dashboardWheelButton);

  const modal = document.createElement('div');
  modal.id = 'cv7991MagicWheelModal';
  modal.className = 'cv7991-magic-wheel-modal';
  modal.hidden = true;
  modal.setAttribute('role', 'dialog');
  modal.setAttribute('aria-modal', 'true');
  modal.setAttribute('aria-labelledby', 'cv7991MagicWheelTitle');
  modal.innerHTML = `
    <div class="cv7991-magic-wheel-backdrop" data-wheel-close="1"></div>
    <section class="cv7991-magic-wheel-dialog">
      <header class="cv7991-magic-wheel-head">
        <div class="cv7991-magic-wheel-head-text">
          <h3 id="cv7991MagicWheelTitle">Vòng quay may mắn</h3>
          <div class="cv7991-magic-wheel-class" id="cv7991MagicWheelClassText"></div>
        </div>
        <button class="cv7991-magic-wheel-close" id="cv7991MagicWheelCloseBtn" type="button">Đóng</button>
      </header>
      <div class="cv7991-magic-wheel-body">
        <div class="cv7991-magic-wheel-main">
          <div class="cv7991-magic-wheel-play-area">
            <div class="cv7991-magic-wheel-volume" title="Âm lượng tiếng quay và tiếng báo học sinh được chọn">
              <label class="cv7991-magic-wheel-volume-label" for="cv7991MagicWheelVolume" aria-label="Âm lượng vòng quay và tiếng báo học sinh">
                <svg aria-hidden="true" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M11 5 6 9H3v6h3l5 4z"/><path d="M15 8a6 6 0 0 1 0 8M18 5a10 10 0 0 1 0 14"/></svg>
              </label>
              <input class="cv7991-magic-wheel-volume-slider" id="cv7991MagicWheelVolume" type="range" min="0" max="100" step="1" value="100" aria-label="Âm lượng vòng quay và tiếng báo học sinh" aria-orientation="vertical"/>
              <output class="cv7991-magic-wheel-volume-value" id="cv7991MagicWheelVolumeValue" for="cv7991MagicWheelVolume">100%</output>
            </div>
          <div class="cv7991-magic-wheel-stage" id="cv7991MagicWheelStage">
            <canvas class="cv7991-magic-wheel-canvas" id="cv7991MagicWheelCanvas" aria-label="Vòng quay danh sách học sinh"></canvas>
            <div class="cv7991-magic-wheel-face" aria-hidden="true">
              <canvas class="cv7991-magic-wheel-canvas cv7991-magic-wheel-rotor" id="cv7991MagicWheelRotor"></canvas>
            </div>
            <div class="cv7991-magic-wheel-pointer" aria-hidden="true"></div>
            <div class="cv7991-magic-wheel-hub" aria-hidden="true">MVIP</div>
          </div>
          </div>
          <button class="cv7991-magic-wheel-spin" id="cv7991MagicWheelSpinBtn" type="button">QUAY</button>
        </div>
        <div class="cv7991-magic-wheel-side">
          <aside class="cv7991-magic-wheel-result-panel" aria-live="polite">
            <div class="cv7991-magic-wheel-result-caption">Học sinh được chọn</div>
            <div class="cv7991-magic-wheel-result-number" id="cv7991MagicWheelResultNumber">--</div>
            <div class="cv7991-magic-wheel-result-name" id="cv7991MagicWheelResultName">Sẵn sàng</div>
            <div class="cv7991-magic-wheel-result-note" id="cv7991MagicWheelResultNote">Bấm QUAY để chọn ngẫu nhiên một học sinh trong lớp.</div>
          </aside>
          <div class="cv7991-magic-wheel-options">
            <label class="cv7991-magic-wheel-auto" for="cv7991MagicWheelAutoSpin">
              <input id="cv7991MagicWheelAutoSpin" type="checkbox"/>
              <span>Tự động quay khi đồng hồ đếm ngược về 0</span>
            </label>
            <label class="cv7991-magic-wheel-auto" for="cv7991MagicWheelAnswerTimerEnabled">
              <input id="cv7991MagicWheelAnswerTimerEnabled" type="checkbox"/>
              <span>Hiện đồng hồ đếm ngược "Thời gian trả lời"</span>
            </label>
          </div>
        </div>
      </div>
    </section>`;
  presenter.appendChild(modal);

  const answerTimer = document.createElement('div');
  answerTimer.id = 'cv7991MagicWheelAnswerTimer';
  answerTimer.className = 'cv7991-wheel-answer-timer';
  answerTimer.hidden = true;
  answerTimer.setAttribute('role','timer');
  answerTimer.setAttribute('aria-live','polite');
  answerTimer.innerHTML = `
    <span class="cv7991-wheel-answer-timer-label">Thời gian trả lời</span>
    <strong class="cv7991-wheel-answer-timer-value" id="cv7991MagicWheelAnswerTimerValue">5</strong>`;
  document.body.appendChild(answerTimer);

  const canvas = modal.querySelector('#cv7991MagicWheelCanvas');
  const rotorCanvas = modal.querySelector('#cv7991MagicWheelRotor');
  const stage = modal.querySelector('#cv7991MagicWheelStage');
  const closeBtn = modal.querySelector('#cv7991MagicWheelCloseBtn');
  const spinBtn = modal.querySelector('#cv7991MagicWheelSpinBtn');
  const classText = modal.querySelector('#cv7991MagicWheelClassText');
  const resultNumber = modal.querySelector('#cv7991MagicWheelResultNumber');
  const resultName = modal.querySelector('#cv7991MagicWheelResultName');
  const resultNote = modal.querySelector('#cv7991MagicWheelResultNote');
  const volumeInput = modal.querySelector('#cv7991MagicWheelVolume');
  const volumeValue = modal.querySelector('#cv7991MagicWheelVolumeValue');
  const autoSpinInput = modal.querySelector('#cv7991MagicWheelAutoSpin');
  const answerTimerEnabledInput = modal.querySelector('#cv7991MagicWheelAnswerTimerEnabled');
  const answerTimerValue = answerTimer.querySelector('#cv7991MagicWheelAnswerTimerValue');
  const WHEEL_VOLUME_KEY = 'mvipMagicWheelVolume';
  const WHEEL_AUTO_SPIN_KEY = 'mvipMagicWheelAutoSpin';
  const WHEEL_ANSWER_TIMER_KEY = 'mvipMagicWheelAnswerTimerEnabled';
  const WHEEL_VOLUME_MAX_GAIN = 3;
  if (!(canvas instanceof HTMLCanvasElement)
      || !(rotorCanvas instanceof HTMLCanvasElement)
      || !(stage instanceof HTMLElement)
      || !(closeBtn instanceof HTMLButtonElement)
      || !(spinBtn instanceof HTMLButtonElement)
      || !(autoSpinInput instanceof HTMLInputElement)
      || !(answerTimerEnabledInput instanceof HTMLInputElement)) return;

  const wheelState = {
    roster:[],
    mon:'',
    source:'word',
    rotation:0,
    selectedIndex:-1,
    spinning:false,
    spinAnimation:null,
    spinWatchdogTimer:0,
    spinStartedAt:0,
    pendingSelectedIndex:-1,
    pendingDesiredRotation:0,
    stopChimeTimer:0,
    animationFrame:0,
    resizeFrame:0,
    dpr:1,
    cssSize:0,
    lastFocus:null,
    lastVisibilityKey:'',
    audioContext:null,
    audioLimiter:null,
    audioVolumeGain:null,
    volumePercent:readWheelVolume(),
    autoSpinEnabled:readWheelAutoSpin(),
    tickBuffer:null,
    lastTickStep:0,
    lastTickAt:0,
    answerTimerId:0,
    answerTimerEndAt:0,
    answerTimerHideId:0,
    answerTimerLastBellSecond:0
  };

  function readWheelVolume() {
    try {
      const saved = localStorage.getItem(WHEEL_VOLUME_KEY);
      if (saved !== null && saved.trim() !== '' && Number.isFinite(Number(saved))) {
        return Math.max(0,Math.min(100,Math.round(Number(saved))));
      }
    } catch (_) {}
    return 100;
  }

  function readWheelAutoSpin() {
    try { return localStorage.getItem(WHEEL_AUTO_SPIN_KEY) === '1'; }
    catch (_) { return false; }
  }

  function readWheelAnswerTimerEnabled() {
    try { return localStorage.getItem(WHEEL_ANSWER_TIMER_KEY) === '1'; }
    catch (_) { return false; }
  }

  autoSpinInput.checked = wheelState.autoSpinEnabled;
  answerTimerEnabledInput.checked = readWheelAnswerTimerEnabled();
  autoSpinInput.setAttribute('aria-checked', wheelState.autoSpinEnabled ? 'true' : 'false');

  function updateWheelVolume(value) {
    const number = Number(value);
    if (!Number.isFinite(number)) return;
    const percent = Math.max(0,Math.min(100,Math.round(number)));
    wheelState.volumePercent = percent;
    volumeInput.value = String(percent);
    volumeInput.setAttribute('aria-valuetext',percent ? `${percent}%` : 'Tắt âm thanh');
    volumeValue.textContent = `${percent}%`;
    const output = wheelState.audioVolumeGain;
    if (output && output.context.state !== 'closed') {
      const now = output.context.currentTime;
      const current = output.gain.value;
      output.gain.cancelScheduledValues(now);
      output.gain.setValueAtTime(current,now);
      output.gain.linearRampToValueAtTime(WHEEL_VOLUME_MAX_GAIN * percent / 100,now + .025);
    }
  }

  function normalizedTier() {
    try { return String((typeof state !== 'undefined' && state.sessionTier) || '').trim().toLowerCase(); }
    catch (_) { return ''; }
  }

  function accessAllowed() {
    const tier = normalizedTier();
    let hasToken = false;
    try { hasToken = !!(typeof state !== 'undefined' && state.token); } catch (_) {}
    return hasToken && ['trial','trail','full'].includes(tier);
  }

  function normalizeMon(value) {
    const raw = String(value || '').trim();
    if (!raw) return '';
    try { return typeof normMonKey === 'function' ? normMonKey(raw) : raw; }
    catch (_) { return raw; }
  }

  function selectedMon(source = wheelState.source || 'word') {
    const mode = source === 'word' ? 'word' : 'mvip';
    if (mode === 'mvip') {
      const mvipSelects = [
        document.getElementById('singleExamClassSelect'),
        compactClassSubjectSelect,
        mainClassSubjectSelect
      ];
      for (const select of mvipSelects) {
        if (!(select instanceof HTMLSelectElement)) continue;
        const direct = normalizeMon(select.value);
        if (direct) return direct;
      }
      try { return normalizeMon(typeof state !== 'undefined' ? state.currentMon : ''); }
      catch (_) { return ''; }
    }
    const direct = normalizeMon(classSelect.value);
    if (direct) return direct;
    try { return normalizeMon(typeof state !== 'undefined' ? state.currentMon : ''); }
    catch (_) { return ''; }
  }

  function rosterForMon(mon) {
    const key = normalizeMon(mon);
    if (!key) return [];
    let students = {};
    let dropped = {};
    try {
      students = typeof classDataStudents === 'function' ? classDataStudents(key) : {};
      dropped = typeof classDataDroppedStudents === 'function' ? classDataDroppedStudents(key) : {};
    } catch (_) {
      students = {};
      dropped = {};
    }
    let ids = [];
    try {
      ids = typeof sortedStudentKeysFromMap === 'function'
        ? sortedStudentKeysFromMap(students)
        : Object.keys(students || {}).sort((a,b) => String(a).localeCompare(String(b),'vi',{numeric:true}));
    } catch (_) {
      ids = Object.keys(students || {});
    }
    ids = ids.filter((id) => !dropped || !dropped[id]);
    const numericLengths = ids.filter((id) => /^\d+$/.test(String(id))).map((id) => String(id).length);
    const padWidth = Math.max(2, numericLengths.length ? Math.max(...numericLengths) : 2);
    return ids.map((id, index) => {
      const rawId = String(id || '').trim();
      const displayId = /^\d+$/.test(rawId) ? rawId.padStart(padWidth,'0') : rawId;
      const hue = Math.round((index * 137.508) % 360);
      const saturation = 76;
      const lightness = index % 2 ? 49 : 58;
      return {
        id:rawId,
        displayId:displayId || String(index + 1).padStart(2,'0'),
        name:String((students && students[id]) || '').trim() || 'Chưa có tên học sinh',
        color:`hsl(${hue} ${saturation}% ${lightness}%)`
      };
    });
  }

  function currentClassLabel(mon, source = wheelState.source || 'word') {
    const selects = [];
    const liveSingleSelect = document.getElementById('singleExamClassSelect');
    if (source !== 'word') {
      if (liveSingleSelect instanceof HTMLSelectElement) selects.push(liveSingleSelect);
      if (compactClassSubjectSelect instanceof HTMLSelectElement) selects.push(compactClassSubjectSelect);
      if (mainClassSubjectSelect instanceof HTMLSelectElement) selects.push(mainClassSubjectSelect);
    }
    if (classSelect instanceof HTMLSelectElement) selects.push(classSelect);
    if (source === 'word' && liveSingleSelect instanceof HTMLSelectElement) selects.push(liveSingleSelect);
    for (const select of selects) {
      const option = Array.from(select.options || []).find((item) => normalizeMon(item.value) === normalizeMon(mon));
      const text = String((option && option.textContent) || '').trim();
      if (text) return text;
    }
    return String(mon || '').trim();
  }

  function setWheelButtonState(button, source, allowed) {
    if (!(button instanceof HTMLButtonElement)) return { mon:'', roster:[] };
    const mon = selectedMon(source);
    const roster = allowed && mon ? rosterForMon(mon) : [];
    const isWordPresentationButton = button === wheelButton;
    const isSinglePresentationButton = button === singleWheelButton;
    const isPresentationButton = isWordPresentationButton || isSinglePresentationButton;
    const presentationOpen = isWordPresentationButton
      ? !presenter.hidden
      : (isSinglePresentationButton ? !singlePresenter.hidden : false);
    /* Hai nút trên thanh trình chiếu luôn có mặt ở mọi loại nội dung và ở cả
       trạng thái thu nhỏ/toàn màn hình. Khi chưa đủ quyền hoặc chưa chọn lớp,
       nút chỉ chuyển sang trạng thái mờ để bố cục không thay đổi. Riêng nút
       ngoài trang chính vẫn giữ quy tắc cũ. */
    const visible = isPresentationButton
      ? presentationOpen
      : true;
    button.hidden = !visible;
    /* Khách/Limited được nhìn thấy và bấm nút để mở bảng quyền truy cập. */
    button.disabled = allowed ? (!mon || roster.length < 1) : false;
    button.title = !allowed
      ? 'Vòng quay may mắn chỉ dành cho tài khoản Trial và Full'
      : (!mon
        ? 'Chọn Lớp-Môn trước'
        : (roster.length
          ? `Vòng quay may mắn · ${currentClassLabel(mon,source)} · ${roster.length} học sinh`
          : 'Lớp-Môn này chưa có danh sách học sinh'));
    return { mon, roster };
  }

  function refreshButtonVisibility() {
    const allowed = accessAllowed();
    const wordStatus = setWheelButtonState(wheelButton,'word',allowed);
    const mvipStatus = setWheelButtonState(singleWheelButton,'mvip',allowed);
    const dashboardStatus = setWheelButtonState(dashboardWheelButton,'mvip',allowed);
    const key = `${allowed ? 1 : 0}|w:${wordStatus.mon}:${wordStatus.roster.length}|m:${mvipStatus.mon}:${mvipStatus.roster.length}|d:${dashboardStatus.mon}:${dashboardStatus.roster.length}`;
    if (wheelState.lastVisibilityKey !== key) wheelState.lastVisibilityKey = key;
    if (!modal.hidden) {
      const activeStatus = wheelState.source === 'word' ? wordStatus : mvipStatus;
      if (wheelState.mon !== activeStatus.mon || !allowed || !activeStatus.roster.length) closeModal(true);
    }
  }

  function randomIndex(length) {
    const count = Math.max(1, Math.floor(Number(length) || 1));
    try {
      if (window.crypto && typeof window.crypto.getRandomValues === 'function') {
        const range = 0x100000000;
        const limit = Math.floor(range / count) * count;
        const values = new Uint32Array(1);
        do { window.crypto.getRandomValues(values); } while (values[0] >= limit);
        return values[0] % count;
      }
    } catch (_) {}
    return Math.floor(Math.random() * count);
  }

  function normalizeAngle(value) {
    let angle = Number(value) || 0;
    angle %= TAU;
    if (angle < 0) angle += TAU;
    return angle;
  }

  function segmentFontSize(count, radius) {
    if (count <= 10) return Math.min(28, radius * .105);
    if (count <= 16) return Math.min(23, radius * .082);
    if (count <= 24) return Math.min(18, radius * .064);
    if (count <= 36) return Math.min(14, radius * .049);
    if (count <= 48) return Math.min(12, radius * .041);
    return Math.max(8, Math.min(10, radius * .034));
  }

  function drawWheel() {
    const frameContext = canvas.getContext('2d');
    const faceContext = rotorCanvas.getContext('2d');
    let context = frameContext;
    const roster = wheelState.roster;
    if (!context || !faceContext || !wheelState.cssSize) return;
    const size = wheelState.cssSize;
    const dpr = wheelState.dpr;
    const center = size / 2;
    const outer = size * .487;
    const inner = size * .112;
    faceContext.setTransform(dpr,0,0,dpr,0,0);
    faceContext.clearRect(0,0,size,size);
    rotorCanvas.style.transform = `rotate(${wheelState.rotation}rad)`;
    context.save();
    context.setTransform(dpr,0,0,dpr,0,0);
    context.clearRect(0,0,size,size);
    context.translate(center,center);

    context.beginPath();
    context.arc(0,0,outer,0,TAU);
    context.fillStyle = '#fbbf24';
    context.fill();
    context.lineWidth = Math.max(5,size * .012);
    context.strokeStyle = '#d97706';
    context.stroke();

    if (!roster.length) {
      context.fillStyle = '#fff';
      context.textAlign = 'center';
      context.textBaseline = 'middle';
      context.font = `900 ${Math.max(16,size*.055)}px Arial,sans-serif`;
      context.fillText('Chưa có học sinh',0,0);
      context.restore();
      return;
    }

    const slice = TAU / roster.length;
    context = faceContext;
    context.save();
    context.translate(center,center);
    roster.forEach((item,index) => {
      const start = -Math.PI / 2 + index * slice;
      const end = start + slice;
      const mid = start + slice / 2;
      context.beginPath();
      context.moveTo(0,0);
      context.arc(0,0,outer * .91,start,end,false);
      context.closePath();
      context.fillStyle = item.color;
      context.fill();
      context.lineWidth = Math.max(1.1,size * .0028);
      context.strokeStyle = 'rgba(255,255,255,.94)';
      context.stroke();

      if (index === wheelState.selectedIndex && !wheelState.spinning) {
        context.save();
        context.beginPath();
        context.moveTo(0,0);
        context.arc(0,0,outer * .91,start,end,false);
        context.closePath();
        context.lineWidth = Math.max(4,size*.011);
        context.strokeStyle = '#fef08a';
        context.stroke();
        context.restore();
      }

      context.save();
      context.rotate(mid);
      context.translate(outer * .67,0);
      context.rotate(Math.PI / 2);
      context.textAlign = 'center';
      context.textBaseline = 'middle';
      const fontSize = segmentFontSize(roster.length,outer);
      context.font = `950 ${fontSize}px Arial,sans-serif`;
      context.lineJoin = 'round';
      context.lineWidth = Math.max(2,fontSize * .23);
      context.strokeStyle = 'rgba(15,23,42,.62)';
      context.strokeText(item.displayId,0,0);
      context.fillStyle = '#fff';
      context.fillText(item.displayId,0,0);
      context.restore();
    });

    context.beginPath();
    context.arc(0,0,inner,0,TAU);
    context.fillStyle = '#f59e0b';
    context.fill();
    context.lineWidth = Math.max(3,size*.008);
    context.strokeStyle = '#fff7ed';
    context.stroke();

    context.restore();
    context = frameContext;
    const lampCount = Math.min(24,Math.max(12,roster.length));
    for (let index = 0; index < lampCount; index += 1) {
      const angle = index / lampCount * TAU;
      const x = Math.cos(angle) * outer * .955;
      const y = Math.sin(angle) * outer * .955;
      context.beginPath();
      context.arc(x,y,Math.max(2.6,size*.0075),0,TAU);
      context.fillStyle = '#fff';
      context.shadowColor = '#fef08a';
      context.shadowBlur = Math.max(5,size*.014);
      context.fill();
      context.shadowBlur = 0;
    }
    context.restore();
  }

  function resizeCanvas() {
    if (modal.hidden) return;
    const rect = stage.getBoundingClientRect();
    const size = Math.max(1,Math.floor(Math.min(rect.width,rect.height || rect.width)));
    const dpr = Math.max(1,Math.min(2,Number(window.devicePixelRatio) || 1));
    if (wheelState.cssSize === size && wheelState.dpr === dpr) return;
    wheelState.cssSize = size;
    wheelState.dpr = dpr;
    [canvas, rotorCanvas].forEach((layer) => {
      layer.width = Math.max(1,Math.round(size * dpr));
      layer.height = Math.max(1,Math.round(size * dpr));
      layer.style.width = `${size}px`;
      layer.style.height = `${size}px`;
    });
    drawWheel();
  }

  function scheduleResize() {
    if (wheelState.resizeFrame) cancelAnimationFrame(wheelState.resizeFrame);
    wheelState.resizeFrame = requestAnimationFrame(() => {
      wheelState.resizeFrame = 0;
      resizeCanvas();
    });
  }

  function setReadyResult() {
    modal.classList.remove('has-result','is-spinning');
    resultNumber.textContent = '--';
    resultName.textContent = 'Sẵn sàng';
    resultNote.textContent = `Bấm QUAY để chọn ngẫu nhiên một học sinh trong ${wheelState.roster.length} học sinh.`;
  }

  function ensurePresentationFullscreen(host) {
    if (!(host instanceof HTMLElement) || (host !== presenter && host !== singlePresenter)) return false;
    const full = document.fullscreenElement || document.webkitFullscreenElement || null;
    if (full instanceof Element
        && (full === host || full.contains(host) || host.contains(full))) return true;
    const button = document.getElementById(
      host === singlePresenter ? 'singleExamFullscreenBtn' : 'wordPresentationFullscreenBtn'
    );
    if (button instanceof HTMLButtonElement) {
      if (button.getAttribute('aria-pressed') === 'true') return true;
      try { button.click(); return true; } catch (_) {}
    }
    const request = host.requestFullscreen || host.webkitRequestFullscreen;
    if (typeof request === 'function') {
      try {
        const pending = request.call(host);
        if (pending && typeof pending.catch === 'function') pending.catch(() => {});
        return true;
      } catch (_) {}
    }
    return false;
  }

  function openModal(source = 'word', options = {}) {
    stopAnswerTimer(true);
    wheelState.source = source === 'word' ? 'word' : 'mvip';
    refreshButtonVisibility();
    const defaultButton = wheelState.source === 'mvip' ? singleWheelButton : wheelButton;
    const defaultPresenter = wheelState.source === 'mvip' ? singlePresenter : presenter;
    const activeButton = options && options.button instanceof HTMLButtonElement ? options.button : defaultButton;
    const activePresenter = options && options.host instanceof HTMLElement ? options.host : defaultPresenter;
    if (activeButton.hidden || activeButton.disabled || wheelState.spinning) return;
    if (window.mvipLimitedAccess && window.mvipLimitedAccess.guard('feature')) return;
    const mon = selectedMon(wheelState.source);
    const roster = rosterForMon(mon);
    if (!accessAllowed()) {
      return;
    }
    if (!mon) {
      if (typeof openAlertModal === 'function') openAlertModal('Bạn chọn Lớp-Môn trước khi mở Vòng quay may mắn.','Thông báo');
      return;
    }
    if (!roster.length) {
      if (typeof openAlertModal === 'function') openAlertModal('Lớp-Môn này chưa có danh sách học sinh đang học.','Thông báo');
      return;
    }
    /* Nút vòng quay nằm trong thao tác người dùng nên yêu cầu toàn màn hình
       tại đây vẫn giữ được user activation của trình duyệt. Chỉ thực hiện sau
       khi đã chắc chắn vòng quay có thể mở. */
    ensurePresentationFullscreen(activePresenter);
    wheelState.lastFocus = document.activeElement instanceof HTMLElement ? document.activeElement : activeButton;
    wheelState.mon = mon;
    wheelState.roster = roster;
    wheelState.rotation = 0;
    wheelState.selectedIndex = -1;
    wheelState.spinning = false;
    wheelState.cssSize = 0; // Repaint the current roster even when reopening at the same size.
    classText.textContent = `${currentClassLabel(mon,wheelState.source)} · ${roster.length} học sinh`;
    if (modal.parentElement !== activePresenter) activePresenter.appendChild(modal);
    setReadyResult();
    modal.hidden = false;
    document.body.classList.add('cv7991-magic-wheel-open');
    closeBtn.disabled = false;
    spinBtn.disabled = false;
    requestAnimationFrame(() => {
      scheduleResize();
      if (options && options.autoSpin === true) {
        // Mở lại đúng vòng kế tiếp rồi kích hoạt chính nút QUAY LẠI.
        spinBtn.textContent = 'QUAY LẠI';
        window.setTimeout(() => {
          if (!modal.hidden && !wheelState.spinning && wheelState.roster.length) {
            try { spinBtn.click(); } catch (_) { spinWheel(); }
          }
        },140);
      } else {
        try { spinBtn.focus({preventScroll:true}); } catch (_) {}
      }
    });
  }

  function closeModal(force = false) {
    if (modal.hidden || (wheelState.spinning && !force)) return;
    if (wheelState.spinAnimation) wheelState.spinAnimation.cancel();
    wheelState.spinAnimation = null;
    if (wheelState.spinWatchdogTimer) window.clearTimeout(wheelState.spinWatchdogTimer);
    wheelState.spinWatchdogTimer = 0;
    wheelState.spinStartedAt = 0;
    wheelState.pendingSelectedIndex = -1;
    wheelState.pendingDesiredRotation = 0;
    clearTimeout(wheelState.stopChimeTimer);
    wheelState.stopChimeTimer = 0;
    if (wheelState.animationFrame) cancelAnimationFrame(wheelState.animationFrame);
    wheelState.animationFrame = 0;
    wheelState.spinning = false;
    wheelState.lastTickStep = 0;
    wheelState.lastTickAt = 0;
    modal.hidden = true;
    modal.classList.remove('is-spinning','has-result');
    document.body.classList.remove('cv7991-magic-wheel-open');
    document.dispatchEvent(new Event('mvip-magic-wheel-closed'));
    const focusTarget = wheelState.lastFocus;
    wheelState.lastFocus = null;
    if (!force && focusTarget instanceof HTMLElement && document.contains(focusTarget)) {
      try { focusTarget.focus({preventScroll:true}); } catch (_) {}
    }
  }

  function easeInOutCubic(value) {
    const x = Math.max(0,Math.min(1,Number(value) || 0));
    return x < .5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2,3) / 2;
  }

  function ensureWheelAudioContext() {
    try {
      const AudioContextCtor = window.AudioContext || window.webkitAudioContext;
      if (!AudioContextCtor) return null;
      let context = wheelState.audioContext;
      if (!context || context.state === 'closed') {
        context = new AudioContextCtor();
        wheelState.audioContext = context;
        wheelState.audioLimiter = null;
        wheelState.audioVolumeGain = null;
        wheelState.tickBuffer = null;
      }
      if (context.state === 'suspended' && typeof context.resume === 'function') {
        try {
          const resumed = context.resume();
          if (resumed && typeof resumed.catch === 'function') resumed.catch(() => {});
        } catch (_) {}
      }
      return context;
    } catch (_) {
      return null;
    }
  }

  function wheelAudioOutput(context) {
    if (!context || context.state === 'closed') return null;
    let volume = wheelState.audioVolumeGain;
    if (!volume || volume.context !== context) {
      try {
        volume = context.createGain();
        volume.gain.setValueAtTime(WHEEL_VOLUME_MAX_GAIN * wheelState.volumePercent / 100,context.currentTime);
        wheelState.audioVolumeGain = volume;
      } catch (_) { return null; }
    }
    try {
      const current = wheelState.audioLimiter;
      if (current && current.context === context) return volume;
      const limiter = context.createDynamicsCompressor();
      limiter.threshold.setValueAtTime(-2,context.currentTime);
      limiter.knee.setValueAtTime(0,context.currentTime);
      limiter.ratio.setValueAtTime(20,context.currentTime);
      limiter.attack.setValueAtTime(.002,context.currentTime);
      limiter.release.setValueAtTime(.08,context.currentTime);
      // Apply the shared 3x gain before the limiter to keep loud peaks controlled.
      volume.connect(limiter);
      limiter.connect(context.destination);
      wheelState.audioLimiter = limiter;
      return volume;
    } catch (_) {
      volume.disconnect();
      volume.connect(context.destination);
      return volume;
    }
  }

  function wheelTickBuffer(context) {
    if (!context) return null;
    if (wheelState.tickBuffer && wheelState.tickBuffer.sampleRate === context.sampleRate) return wheelState.tickBuffer;
    try {
      const duration = .032;
      const length = Math.max(1,Math.round(context.sampleRate * duration));
      const buffer = context.createBuffer(1,length,context.sampleRate);
      const data = buffer.getChannelData(0);
      for (let index = 0; index < length; index += 1) {
        const remaining = 1 - index / length;
        const impulse = index < 3 ? (index === 0 ? 1 : -.55) : 0;
        data[index] = (impulse + (Math.random() * 2 - 1) * .52) * Math.pow(remaining,3.4);
      }
      wheelState.tickBuffer = buffer;
      return buffer;
    } catch (_) {
      return null;
    }
  }

  function playWheelTick(strength = 1) {
    try {
      const context = ensureWheelAudioContext();
      if (!context || context.state === 'closed') return;
      const buffer = wheelTickBuffer(context);
      if (!buffer) return;
      const now = context.currentTime;
      const source = context.createBufferSource();
      const filter = context.createBiquadFilter();
      const gain = context.createGain();
      source.buffer = buffer;
      filter.type = 'bandpass';
      filter.frequency.setValueAtTime(1750,now);
      filter.Q.setValueAtTime(.82,now);
      // Gấp đôi biên độ so với phiên bản 102 (tăng khoảng 6 dB).
      const peak = Math.max(.44,Math.min(1.18,1.04 * (Number(strength) || 1)));
      gain.gain.setValueAtTime(.0001,now);
      gain.gain.exponentialRampToValueAtTime(peak,now + .0015);
      gain.gain.exponentialRampToValueAtTime(.0001,now + .035);
      source.connect(filter);
      filter.connect(gain);
      const output = wheelAudioOutput(context);
      if (!output) return;
      gain.connect(output);
      source.start(now);
      source.stop(now + .04);
    } catch (_) {}
  }

  function wheelTickMinimumGap(progress) {
    const value = Math.max(0,Math.min(1,Number(progress) || 0));
    const phase = value <= .5 ? value / .5 : (1 - value) / .5;
    const speedShape = Math.pow(Math.max(0,Math.min(1,phase)),.86);
    return 410 - (410 - 42) * speedShape;
  }

  function playStopChime() {
    try {
      const context = ensureWheelAudioContext();
      if (!context || context.state === 'closed') return;
      const oscillator = context.createOscillator();
      const gain = context.createGain();
      oscillator.type = 'sine';
      oscillator.frequency.setValueAtTime(880,context.currentTime);
      oscillator.frequency.exponentialRampToValueAtTime(1320,context.currentTime + .18);
      gain.gain.setValueAtTime(.0001,context.currentTime);
      // Giảm riêng tiếng chuông khoảng 4 dB; giữ nguyên âm lượng tiếng tạch.
      gain.gain.exponentialRampToValueAtTime(.61,context.currentTime + .025);
      gain.gain.exponentialRampToValueAtTime(.0001,context.currentTime + .52);
      oscillator.connect(gain);
      const output = wheelAudioOutput(context);
      if (!output) return;
      gain.connect(output);
      oscillator.start();
      oscillator.stop(context.currentTime + .55);
    } catch (_) {}
  }

  function clearSpinWatchdog() {
    if (wheelState.spinWatchdogTimer) window.clearTimeout(wheelState.spinWatchdogTimer);
    wheelState.spinWatchdogTimer = 0;
  }

  function recoverStuckSpin(maxAgeMs = 7000, reason = 'watchdog') {
    if (!wheelState.spinning || !wheelState.spinStartedAt) return false;
    const age = Date.now() - wheelState.spinStartedAt;
    const requestedAge = Number(maxAgeMs);
    const threshold = Number.isFinite(requestedAge) ? Math.max(0, requestedAge) : 7000;
    if (age < threshold) return false;
    const index = Number.isInteger(wheelState.pendingSelectedIndex)
      && wheelState.pendingSelectedIndex >= 0
      && wheelState.pendingSelectedIndex < wheelState.roster.length
      ? wheelState.pendingSelectedIndex
      : randomIndex(wheelState.roster.length);
    if (Number.isFinite(wheelState.pendingDesiredRotation)) {
      wheelState.rotation = wheelState.pendingDesiredRotation;
      rotorCanvas.style.transform = `rotate(${wheelState.rotation}rad)`;
    }
    finishSpin(index);
    try {
      document.dispatchEvent(new CustomEvent('mvip-magic-wheel-watchdog-recovered', {
        detail: { age, reason }
      }));
    } catch (_) {}
    return true;
  }

  function finishSpin(index) {
    if (!wheelState.spinning) return;
    clearSpinWatchdog();
    if (wheelState.animationFrame) cancelAnimationFrame(wheelState.animationFrame);
    if (wheelState.spinAnimation) wheelState.spinAnimation.cancel();
    wheelState.spinAnimation = null;
    wheelState.spinning = false;
    wheelState.animationFrame = 0;
    wheelState.spinStartedAt = 0;
    wheelState.pendingSelectedIndex = -1;
    wheelState.pendingDesiredRotation = 0;
    wheelState.selectedIndex = index;
    modal.classList.remove('is-spinning');
    modal.classList.remove('has-result');
    void modal.offsetWidth;
    modal.classList.add('has-result');
    closeBtn.disabled = false;
    spinBtn.disabled = false;
    spinBtn.textContent = 'QUAY LẠI';
    const selected = wheelState.roster[index];
    resultNumber.textContent = selected ? selected.displayId : '--';
    resultName.textContent = selected ? selected.name : 'Không xác định';
    resultNote.textContent = selected ? `Mã học sinh ${selected.displayId}` : '';
    drawWheel();
    // Phát tiếng tạch cuối đúng lúc kim dừng, sau đó phát chuông báo kết quả.
    playWheelTick(1.12);
    wheelState.stopChimeTimer = window.setTimeout(() => {
      wheelState.stopChimeTimer = 0;
      if (!modal.hidden && !wheelState.spinning) playStopChime();
    },85);
    try { spinBtn.focus({preventScroll:true}); } catch (_) {}
  }

  function spinWheel() {
    if (modal.hidden || wheelState.spinning || !wheelState.roster.length) return;
    clearTimeout(wheelState.stopChimeTimer);
    wheelState.stopChimeTimer = 0;
    // Đánh thức Web Audio ngay trong thao tác bấm QUAY để trình duyệt không chặn âm thanh.
    ensureWheelAudioContext();
    wheelState.spinning = true;
    wheelState.selectedIndex = -1;
    modal.classList.remove('has-result');
    modal.classList.add('is-spinning');
    closeBtn.disabled = true;
    spinBtn.disabled = true;
    spinBtn.textContent = 'ĐANG QUAY…';
    resultNumber.textContent = '…';
    resultName.textContent = 'Vòng quay đang chọn';
    resultNote.textContent = 'Vòng quay tăng tốc trong khoảng 2 giây rồi chậm dần.';

    const selectedIndex = randomIndex(wheelState.roster.length);
    const slice = TAU / wheelState.roster.length;
    const desiredRotation = normalizeAngle(-(selectedIndex + .5) * slice);
    wheelState.spinStartedAt = Date.now();
    wheelState.pendingSelectedIndex = selectedIndex;
    wheelState.pendingDesiredRotation = desiredRotation;
    const currentNormalized = normalizeAngle(wheelState.rotation);
    const alignment = normalizeAngle(desiredRotation - currentNormalized);
    const fullTurns = 7 + randomIndex(3);
    const totalRotation = fullTurns * TAU + alignment;
    const startRotation = wheelState.rotation;
    const startTime = performance.now();
    const duration = 4000; // 2 giây tăng tốc + 2 giây chậm dần, giữ nguyên âm thanh bản 26.
    // Cầu chì an toàn: animation bình thường chỉ 4 giây. Nếu Chrome bỏ lỡ
    // callback/Promise/rAF, tối đa khoảng 7 giây MVIP sẽ tự chốt kết quả.
    clearSpinWatchdog();
    wheelState.spinWatchdogTimer = window.setTimeout(() => {
      wheelState.spinWatchdogTimer = 0;
      recoverStuckSpin(0, 'timeout');
    }, 7000);
    wheelState.lastTickStep = Math.floor(startRotation / slice);
    wheelState.lastTickAt = startTime;
    playWheelTick(.9);
    drawWheel();

    // The browser rotates a cached face independently of slide-rendering JavaScript.
    // Sample the existing easing so speed, duration and the chosen segment stay the same.
    let animation = null;
    if (typeof rotorCanvas.animate === 'function') {
      try {
        animation = rotorCanvas.animate(Array.from({ length:65 }, (_, index) => {
          const progress = index / 64;
          return { offset:progress, transform:`rotate(${startRotation + totalRotation * easeInOutCubic(progress)}rad)` };
        }), { duration, easing:'linear', fill:'forwards' });
      } catch (_) {}
    }
    wheelState.spinAnimation = animation;
    const complete = () => {
      if (!wheelState.spinning || wheelState.spinAnimation !== animation) return;
      wheelState.rotation = desiredRotation;
      finishSpin(selectedIndex);
    };
    if (animation) animation.finished.then(complete, () => {});

    const frame = (now) => {
      if (!wheelState.spinning) return;
      const elapsed = animation && typeof animation.currentTime === 'number'
        ? animation.currentTime : now - startTime;
      const progress = Math.max(0,Math.min(1,elapsed / duration));
      wheelState.rotation = startRotation + totalRotation * easeInOutCubic(progress);

      /* Phát “tạch” khi các vạch chia đi qua kim. Khoảng cách âm giảm dần trong
         2 giây đầu và tăng dần trong 2 giây cuối, nên nhịp nghe đúng với tốc độ quay. */
      const currentTickStep = Math.floor(wheelState.rotation / slice);
      if (currentTickStep !== wheelState.lastTickStep) {
        const minimumGap = wheelTickMinimumGap(progress);
        if (now - wheelState.lastTickAt >= minimumGap) {
          playWheelTick(1);
          wheelState.lastTickAt = now;
        }
        wheelState.lastTickStep = currentTickStep;
      }

      if (!animation) rotorCanvas.style.transform = `rotate(${wheelState.rotation}rad)`;
      if (progress < 1) {
        wheelState.animationFrame = requestAnimationFrame(frame);
      } else {
        complete();
      }
    };
    wheelState.animationFrame = requestAnimationFrame(frame);
  }

  wheelButton.addEventListener('click',(event) => {
    event.preventDefault();
    event.stopPropagation();
    openModal('word');
  });
  singleWheelButton.addEventListener('click',(event) => {
    event.preventDefault();
    event.stopPropagation();
    openModal('mvip');
  });
  dashboardWheelButton.addEventListener('click',(event) => {
    event.preventDefault();
    event.stopPropagation();
    const wordVisible = !presenter.hidden;
    const mvipVisible = !singlePresenter.hidden;
    const source = mvipVisible ? 'mvip' : (wordVisible ? 'word' : 'mvip');
    const host = mvipVisible ? singlePresenter : (wordVisible ? presenter : document.body);
    openModal(source,{button:dashboardWheelButton,host});
  });
  updateWheelVolume(wheelState.volumePercent);
  volumeInput.addEventListener('input',() => updateWheelVolume(volumeInput.value));
  volumeInput.addEventListener('change',() => {
    updateWheelVolume(volumeInput.value);
    try { localStorage.setItem(WHEEL_VOLUME_KEY,String(wheelState.volumePercent)); } catch (_) {}
  });
  spinBtn.addEventListener('click',spinWheel);

  autoSpinInput.addEventListener('change',() => {
    wheelState.autoSpinEnabled = !!autoSpinInput.checked;
    autoSpinInput.setAttribute('aria-checked', wheelState.autoSpinEnabled ? 'true' : 'false');
    try { localStorage.setItem(WHEEL_AUTO_SPIN_KEY, wheelState.autoSpinEnabled ? '1' : '0'); } catch (_) {}
  });

  answerTimerEnabledInput.addEventListener('change',() => {
    try { localStorage.setItem(WHEEL_ANSWER_TIMER_KEY, answerTimerEnabledInput.checked ? '1' : '0'); } catch (_) {}
    if (!answerTimerEnabledInput.checked) stopAnswerTimer(true);
  });

  function stopAnswerTimer(immediate = true) {
    if (wheelState.answerTimerId) {
      window.clearInterval(wheelState.answerTimerId);
      wheelState.answerTimerId = 0;
    }
    if (wheelState.answerTimerHideId) {
      window.clearTimeout(wheelState.answerTimerHideId);
      wheelState.answerTimerHideId = 0;
    }
    wheelState.answerTimerEndAt = 0;
    wheelState.answerTimerLastBellSecond = 0;
    answerTimer.classList.remove('is-ending');
    if (immediate) answerTimer.hidden = true;
  }

  // Chuông RIÊNG của đồng hồ “Thời gian trả lời”.
  // Dùng âm đôi ngắn, sáng và nhẹ để phân biệt với chuông của đồng hồ chính.
  function playAnswerTimerBell(second) {
    try {
      const context = ensureWheelAudioContext();
      if (!context || context.state === 'closed') return;

      const output = wheelAudioOutput(context);
      if (!output) return;

      const now = context.currentTime;
      const master = context.createGain();
      master.gain.setValueAtTime(.0001, now);
      master.gain.exponentialRampToValueAtTime(.22, now + .008);
      master.gain.exponentialRampToValueAtTime(.0001, now + .19);
      master.connect(output);

      const base = second <= 2 ? 1046.5 : 880;
      const tones = [
        {freq:base, type:'sine', gain:.78},
        {freq:base * 1.5, type:'triangle', gain:.22}
      ];

      tones.forEach((tone) => {
        const osc = context.createOscillator();
        const gain = context.createGain();
        osc.type = tone.type;
        osc.frequency.setValueAtTime(tone.freq, now);
        osc.frequency.exponentialRampToValueAtTime(tone.freq * 1.035, now + .07);
        gain.gain.setValueAtTime(tone.gain, now);
        gain.gain.exponentialRampToValueAtTime(.0001, now + .18);
        osc.connect(gain);
        gain.connect(master);
        osc.start(now);
        osc.stop(now + .20);
      });
    } catch (_) {}
  }

  function startFiveSecondAnswerCountdown(source = wheelState.source) {
    stopAnswerTimer(true);

    // Khi trình chiếu đang ở Fullscreen, trình duyệt chỉ hiển thị các phần tử
    // nằm BÊN TRONG phần tử fullscreen. Vì vậy đồng hồ trả lời phải được gắn
    // vào đúng presenter đang hoạt động, không để ngoài document.body.
    const timerHost = source === 'word' ? presenter : singlePresenter;
    if (timerHost instanceof HTMLElement && answerTimer.parentElement !== timerHost) {
      timerHost.appendChild(answerTimer);
    }

    wheelState.answerTimerEndAt = Date.now() + 5000;
    wheelState.answerTimerLastBellSecond = 5;
    answerTimer.hidden = false;
    answerTimer.classList.remove('is-ending');
    if (answerTimerValue) answerTimerValue.textContent = '5';
    playAnswerTimerBell(5);

    const tick = () => {
      if (!wheelState.answerTimerEndAt) return;
      const remaining = Math.max(0, Math.ceil((wheelState.answerTimerEndAt - Date.now()) / 1000));
      if (answerTimerValue) answerTimerValue.textContent = String(remaining);
      answerTimer.classList.toggle('is-ending', remaining <= 2);

      if (remaining >= 1 && remaining <= 5 && remaining !== wheelState.answerTimerLastBellSecond) {
        wheelState.answerTimerLastBellSecond = remaining;
        playAnswerTimerBell(remaining);
      }

      if (remaining <= 0) {
        if (wheelState.answerTimerId) {
          window.clearInterval(wheelState.answerTimerId);
          wheelState.answerTimerId = 0;
        }
        wheelState.answerTimerEndAt = 0;

        // Đây là đồng hồ RIÊNG cho học sinh trả lời.
        // Về 0 chỉ tự ẩn; TUYỆT ĐỐI không phát sự kiện mở vòng quay.
        wheelState.answerTimerHideId = window.setTimeout(() => {
          wheelState.answerTimerHideId = 0;
          answerTimer.hidden = true;
          answerTimer.classList.remove('is-ending');
        }, 220);
      }
    };

    tick();
    wheelState.answerTimerId = window.setInterval(tick, 100);
  }

  closeBtn.addEventListener('click',() => {
    const source = wheelState.source === 'word' ? 'word' : 'mvip';
    const host = source === 'word' ? presenter : singlePresenter;
    const hasChosenStudent = wheelState.selectedIndex >= 0 || modal.classList.contains('has-result');
    const shouldStartAnswerCountdown = !!answerTimerEnabledInput.checked
      && !wheelState.spinning
      && hasChosenStudent
      && host instanceof HTMLElement
      && !host.hidden;

    closeModal(false);

    if (shouldStartAnswerCountdown) {
      window.setTimeout(() => startFiveSecondAnswerCountdown(source),80);
    }
  });

  // CHỈ đồng hồ chính trên thanh công cụ được phép kích hoạt vòng quay tự động.
  document.addEventListener('mvip-magic-wheel-main-countdown-finished',(event) => {
    if (!wheelState.autoSpinEnabled || wheelState.spinning || !modal.hidden) return;
    const source = event instanceof CustomEvent && event.detail && event.detail.source === 'word' ? 'word' : 'mvip';
    const host = source === 'word' ? presenter : singlePresenter;
    if (!(host instanceof HTMLElement) || host.hidden) return;

    window.setTimeout(() => {
      if (!wheelState.autoSpinEnabled || wheelState.spinning || !modal.hidden || host.hidden) return;
      openModal(source,{ host, autoSpin:true });
    },90);
  });

  modal.addEventListener('click',(event) => {
    if (!(event.target instanceof Element) || !event.target.closest('[data-wheel-close="1"]')) return;

    const source = wheelState.source === 'word' ? 'word' : 'mvip';
    const host = source === 'word' ? presenter : singlePresenter;
    const hasChosenStudent = wheelState.selectedIndex >= 0 || modal.classList.contains('has-result');
    const shouldStartAnswerCountdown = !!answerTimerEnabledInput.checked
      && !wheelState.spinning
      && hasChosenStudent
      && host instanceof HTMLElement
      && !host.hidden;

    closeModal(false);

    if (shouldStartAnswerCountdown) {
      window.setTimeout(() => startFiveSecondAnswerCountdown(source),80);
    }
  });
  modal.addEventListener('keydown',(event) => {
    if (event.key === 'Escape') {
      event.preventDefault();
      closeModal(false);
    } else if ((event.key === 'Enter' || event.key === ' ') && event.target === spinBtn) {
      event.preventDefault();
      spinWheel();
    }
  });
  classSelect.addEventListener('change',() => {
    if (!modal.hidden && wheelState.source === 'word') closeModal(true);
    refreshButtonVisibility();
  });
  if (singleClassSelect instanceof HTMLSelectElement) {
    singleClassSelect.addEventListener('change',() => {
      if (!modal.hidden && wheelState.source === 'mvip') closeModal(true);
      refreshButtonVisibility();
    });
  }
  [compactClassSubjectSelect, mainClassSubjectSelect].forEach((select) => {
    if (!(select instanceof HTMLSelectElement)) return;
    select.addEventListener('change',() => {
      if (!modal.hidden && wheelState.source === 'mvip') closeModal(true);
      refreshButtonVisibility();
    });
  });
  document.addEventListener('mvip-magic-wheel-closed',() => {});
  window.addEventListener('pagehide',() => stopAnswerTimer(true));
  window.addEventListener('resize',scheduleResize);
  document.addEventListener('fullscreenchange',() => setTimeout(scheduleResize,80));
  document.addEventListener('webkitfullscreenchange',() => setTimeout(scheduleResize,80));
  if (typeof ResizeObserver === 'function') {
    const resizeObserver = new ResizeObserver(scheduleResize);
    resizeObserver.observe(stage);
  }
  if (typeof MutationObserver === 'function') {
    const selectObserver = new MutationObserver(refreshButtonVisibility);
    selectObserver.observe(classSelect,{childList:true,subtree:true,attributes:true});
    if (singleClassSelect instanceof HTMLSelectElement) {
      selectObserver.observe(singleClassSelect,{childList:true,subtree:true,attributes:true});
    }
    const presenterObserver = new MutationObserver(() => {
      refreshButtonVisibility();
      if (wheelState.source === 'word' && modal.parentElement === presenter && presenter.hidden && !modal.hidden) closeModal(true);
    });
    presenterObserver.observe(presenter,{attributes:true,attributeFilter:['hidden','class']});
    const singlePresenterObserver = new MutationObserver(() => {
      refreshButtonVisibility();
      if (wheelState.source === 'mvip' && modal.parentElement === singlePresenter && singlePresenter.hidden && !modal.hidden) closeModal(true);
    });
    singlePresenterObserver.observe(singlePresenter,{attributes:true,attributeFilter:['hidden','class']});
  }
  const visibilityTimer = window.setInterval(refreshButtonVisibility,700);
  window.addEventListener('pagehide',() => {
    window.clearInterval(visibilityTimer);
    try {
      if (wheelState.audioContext && wheelState.audioContext.state !== 'closed') wheelState.audioContext.close();
    } catch (_) {}
  },{once:true});

  // Lớp tự phục hồi thứ hai: không phụ thuộc Web Animations API.
  // Chỉ kiểm tra cục bộ 1 giây/lần, không phát sinh request lên máy chủ.
  const spinHealthTimer = window.setInterval(() => recoverStuckSpin(8000, 'health-check'), 1000);
  document.addEventListener('visibilitychange', () => {
    if (!document.hidden) recoverStuckSpin(7000, 'visibility');
  });
  window.addEventListener('focus', () => recoverStuckSpin(7000, 'focus'));
  window.addEventListener('pagehide', () => window.clearInterval(spinHealthTimer), {once:true});

  refreshButtonVisibility();
  window.mvipMagicWheel = {
    open:(source = '') => openModal(source || (!singlePresenter.hidden ? 'mvip' : 'word')),
    close:() => closeModal(false),
    spin:spinWheel,
    refresh:refreshButtonVisibility,
    isOpen:() => !modal.hidden,
    isSpinning:() => !!wheelState.spinning,
    spinAge:() => wheelState.spinning && wheelState.spinStartedAt ? Math.max(0, Date.now() - wheelState.spinStartedAt) : 0,
    recoverIfStuck:(maxAgeMs = 7000) => recoverStuckSpin(maxAgeMs, 'remote-check')
  };
})();
</script>


<!-- Bản điều chỉnh 2026-08-21: khi phóng to hình/biểu đồ, hiện đủ con trỏ, bút, laze, bút nhớ và tẩy ngay trên thanh tiêu đề; cho phép viết trực tiếp lên hình phóng to và Ctrl+Z hoàn tác. -->
<style id="cv7991-image-zoom-full-ink-toolbar-20260821">
  #wordPresentationImageZoomModal .word-presentation-image-zoom-head {
    justify-content:flex-start;
    overflow:visible;
  }
  #wordPresentationImageZoomModal .word-presentation-image-zoom-head > strong {
    flex:0 1 auto;
    max-width:min(25vw, 280px);
  }
  .word-image-zoom-ink-tools {
    position:relative;
    z-index:60;
    flex:1 1 auto;
    min-width:0;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:center;
    gap:5px;
  }
  #wordImageZoomInkTools > button { flex-shrink:0; }
  .word-image-zoom-ink-tool-btn,
  .word-image-zoom-ink-config-btn {
    min-height:36px;
    height:36px;
    box-sizing:border-box;
    border:1px solid #94a3b8;
    border-radius:9px;
    background:#fff;
    color:#334155;
    font-family:Arial, Helvetica, sans-serif;
    font-size:13px;
    font-weight:800;
    cursor:pointer;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:6px;
    white-space:nowrap;
  }
  .word-image-zoom-ink-tool-btn {
    width:36px; min-width:36px; padding:0;
  }
  #wordImageZoomInkTools > .word-image-zoom-ink-tool-btn > span { display:none !important; }
  .word-image-zoom-ink-tool-btn svg {
    width:19px;
    height:19px;
    flex:0 0 auto;
    display:block;
    pointer-events:none;
  }
  .word-image-zoom-ink-tool-btn:hover,
  .word-image-zoom-ink-tool-btn[aria-pressed="true"] {
    border-color:#2563eb;
    background:#eff6ff;
    color:#1d4ed8;
  }
  .word-image-zoom-ink-tool-btn[aria-pressed="true"] {
    box-shadow:0 0 0 3px rgba(37,99,235,.14);
  }
  .word-image-zoom-ink-config-btn {
    width:36px;
    min-width:36px;
    padding:0;
  }
  .word-image-zoom-ink-config-btn[hidden] { display:none !important; }
  .word-image-zoom-ink-config-btn[aria-expanded="true"] {
    border-color:#7c3aed;
    box-shadow:0 0 0 3px rgba(124,58,237,.14);
  }
  .word-image-zoom-ink-config-dot {
    width:19px;
    height:19px;
    border:2px solid #fff;
    border-radius:50%;
    box-shadow:0 0 0 1px #64748b;
    background:var(--zoom-ink-color, #ef4444);
    pointer-events:none;
  }
  .word-image-zoom-ink-config-square {
    width:var(--zoom-eraser-preview, 16px);
    height:var(--zoom-eraser-preview, 16px);
    min-width:8px;
    min-height:8px;
    max-width:22px;
    max-height:22px;
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.8);
    pointer-events:none;
  }
  .word-image-zoom-ink-popover[hidden] { display:none !important; }
  .word-image-zoom-ink-popover {
    position:absolute;
    top:calc(100% + 9px);
    left:50%;
    transform:translateX(-50%);
    z-index:90;
    box-sizing:border-box;
    min-width:184px;
    padding:10px;
    display:grid;
    grid-template-columns:repeat(4, 34px);
    justify-content:center;
    gap:8px;
    border:1px solid #cbd5e1;
    border-radius:12px;
    background:#fff;
    box-shadow:0 16px 38px rgba(15,23,42,.3);
  }
  .word-image-zoom-ink-swatch,
  .word-image-zoom-ink-size-btn {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0;
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
  }
  .word-image-zoom-ink-swatch {
    border:2px solid #e2e8f0;
    border-radius:50%;
    background:var(--zoom-ink-swatch, #ef4444);
    box-shadow:inset 0 0 0 3px #fff;
  }
  .word-image-zoom-ink-size-btn {
    border:2px solid #e2e8f0;
    border-radius:8px;
    background:#fff;
  }
  .word-image-zoom-ink-swatch:hover,
  .word-image-zoom-ink-swatch[aria-checked="true"],
  .word-image-zoom-ink-size-btn:hover,
  .word-image-zoom-ink-size-btn[aria-checked="true"] {
    border-color:#0f172a;
    background-color:#eff6ff;
    transform:scale(1.05);
  }
  .word-image-zoom-ink-size-square {
    width:var(--zoom-eraser-size-preview, 16px);
    height:var(--zoom-eraser-size-preview, 16px);
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.82);
    pointer-events:none;
  }
  #wordPresentationImageZoomModal .word-presentation-image-zoom-close {
    margin-left:auto;
  }
  #wordPresentationImageZoomContent {
    position:relative !important;
    isolation:isolate;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas {
    position:absolute !important;
    inset:0 !important;
    z-index:7 !important;
    display:block !important;
    width:100% !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:0 !important;
    box-shadow:none !important;
    transform:none !important;
    pointer-events:none;
    touch-action:none;
    user-select:none;
    -webkit-user-select:none;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-laser-canvas {
    z-index:8 !important;
    pointer-events:none !important;
    opacity:1;
    transition:opacity .48s ease-out;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-laser-canvas.is-fading { opacity:0; }
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas.is-active {
    pointer-events:auto;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas.is-active[data-tool="pen"],
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas.is-active[data-tool="highlighter"] {
    cursor:crosshair;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas.is-active[data-tool="eraser"],
  #wordPresentationImageZoomContent > .word-image-zoom-ink-canvas.is-active[data-tool="laser"] {
    cursor:none;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-eraser-cursor {
    position:absolute !important;
    z-index:9 !important;
    display:none !important;
    box-sizing:border-box !important;
    width:var(--zoom-eraser-cursor-size, 38px) !important;
    height:var(--zoom-eraser-cursor-size, 38px) !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    border:2px solid rgba(15,23,42,.92) !important;
    border-radius:2px !important;
    background:rgba(255,255,255,.12) !important;
    box-shadow:0 0 0 1px rgba(255,255,255,.9), 0 1px 5px rgba(15,23,42,.25) !important;
    pointer-events:none !important;
    transform:translate(-50%, -50%) !important;
  }
  #wordPresentationImageZoomContent > .word-image-zoom-eraser-cursor.is-visible {
    display:block !important;
  }
  @media (max-width:980px) {
    #wordPresentationImageZoomModal .word-presentation-image-zoom-head > strong {
      flex-basis:150px;
      max-width:150px;
    }
    .word-image-zoom-ink-tool-btn {
      width:34px;
      min-width:34px;
      padding:0;
    }
    .word-image-zoom-ink-tool-btn span { display:none; }
  }
  @media (max-width:560px) {
    #wordPresentationImageZoomModal .word-presentation-image-zoom-head > strong { display:none; }
    .word-image-zoom-ink-tools { justify-content:flex-start; }
    .word-image-zoom-ink-tool-btn,
    .word-image-zoom-ink-config-btn {
      width:31px;
      min-width:31px;
      height:31px;
      min-height:31px;
      border-radius:7px;
    }
    .word-image-zoom-ink-tool-btn svg { width:17px; height:17px; }
    #wordPresentationImageZoomModal .word-presentation-image-zoom-close {
      min-height:32px;
      padding:0 9px;
      font-size:13px;
    }
  }
</style>
<script id="cv7991-image-zoom-full-ink-toolbar-script-20260821">
(() => {
  'use strict';

  const modal = document.getElementById('wordPresentationImageZoomModal');
  const head = modal && modal.querySelector('.word-presentation-image-zoom-head');
  const content = document.getElementById('wordPresentationImageZoomContent');
  const closeBtn = document.getElementById('wordPresentationImageZoomCloseBtn');
  if (!(modal instanceof HTMLElement)
      || !(head instanceof HTMLElement)
      || !(content instanceof HTMLElement)
      || !(closeBtn instanceof HTMLElement)
      || document.getElementById('wordImageZoomInkTools')) return;

  const ICONS = Object.freeze({
    cursor:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 3.5 18.2 13l-6.1 1.1 3.4 5.1-2.8 1.8-3.3-5.2L5 20V3.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    pen:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 20l4.2-1 10.4-10.4a2.1 2.1 0 0 0 0-3L18.4 5.4a2.1 2.1 0 0 0-3 0L5 15.8 4 20Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="m13.9 6.9 3.2 3.2M4 20h5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    laser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 19 15.7 8.3l-3-3L2 16l3 3Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m13.4 10.6 2.8 2.8M17.5 4.5 20 2M19.5 8H23M16 1v3.5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    highlighter:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m5 14 8.8-8.8 5 5L10 19H5v-5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m11.5 7.5 5 5M3 22h18" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    eraser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m7.2 18.7-3.1-3.1a2 2 0 0 1 0-2.8l8.5-8.5a2 2 0 0 1 2.8 0l4.3 4.3a2 2 0 0 1 0 2.8l-7.3 7.3H7.2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m9.2 7.7 7.1 7.1M7.2 18.7H20" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>'
  });
  const TOOL_DEFS = Object.freeze([
    { id:'cursor', label:'Con trỏ chuột' },
    { id:'pen', label:'Bút viết' },
    { id:'laser', label:'Bút laze' },
    { id:'highlighter', label:'Bút nhớ' },
    { id:'eraser', label:'Tẩy' }
  ]);
  const TOOL_IDS = new Set(TOOL_DEFS.map((entry) => entry.id));
  const PEN_COLORS = Object.freeze([
    { value:'#ef4444', name:'Đỏ' },
    { value:'#7c3aed', name:'Tím' },
    { value:'#facc15', name:'Vàng' },
    { value:'#2563eb', name:'Xanh' }
  ]);
  const HIGHLIGHTER_COLORS = Object.freeze([
    { value:'#A8FF00', name:'Xanh huỳnh quang hiện tại' },
    { value:'#D4FF00', name:'Vàng xanh huỳnh quang' },
    { value:'#FF4FA3', name:'Hồng' },
    { value:'#A855F7', name:'Tím' }
  ]);
  const ERASER_SIZES = Object.freeze([
    { value:52, preview:24, name:'Tẩy rất to' },
    { value:38, preview:19, name:'Tẩy to' },
    { value:26, preview:14, name:'Tẩy vừa' },
    { value:16, preview:9, name:'Tẩy nhỏ' }
  ]);

  const tools = document.createElement('div');
  tools.className = 'word-image-zoom-ink-tools';
  tools.id = 'wordImageZoomInkTools';
  tools.setAttribute('aria-label', 'Bộ công cụ viết trên hình phóng to');

  const toolButtons = new Map();
  TOOL_DEFS.forEach((entry) => {
    const button = document.createElement('button');
    button.type = 'button';
    button.className = 'word-image-zoom-ink-tool-btn';
    button.dataset.zoomInkTool = entry.id;
    button.setAttribute('aria-label', entry.label);
    button.setAttribute('aria-pressed', entry.id === 'cursor' ? 'true' : 'false');
    button.title = entry.label;
    button.innerHTML = `${ICONS[entry.id]}<span>${entry.label}</span>`;
    toolButtons.set(entry.id, button);
    tools.appendChild(button);
  });

  const configBtn = document.createElement('button');
  configBtn.type = 'button';
  configBtn.className = 'word-image-zoom-ink-config-btn word-image-zoom-ink-color-config-btn';
  configBtn.id = 'wordImageZoomInkConfigBtn';
  configBtn.setAttribute('aria-haspopup', 'menu');
  configBtn.setAttribute('aria-expanded', 'false');
  configBtn.hidden = false;

  const eraserConfigBtn = document.createElement('button');
  eraserConfigBtn.type = 'button';
  eraserConfigBtn.className = 'word-image-zoom-ink-config-btn word-image-zoom-ink-eraser-config-btn';
  eraserConfigBtn.id = 'wordImageZoomEraserConfigBtn';
  eraserConfigBtn.setAttribute('aria-haspopup', 'menu');
  eraserConfigBtn.setAttribute('aria-expanded', 'false');
  eraserConfigBtn.hidden = true;

  const popover = document.createElement('div');
  popover.className = 'word-image-zoom-ink-popover';
  popover.id = 'wordImageZoomInkPopover';
  popover.hidden = true;
  popover.setAttribute('role', 'menu');

  tools.append(configBtn, eraserConfigBtn, popover);
  head.insertBefore(tools, closeBtn);

  let canvas = null;
  let laserCanvas = null;
  let eraserCursor = null;
  let boundVisual = null;

  const state = {
    tool:'cursor',
    penColor:'#ef4444',
    highlighterColor:'#A8FF00',
    eraserWidth:38,
    strokes:[],
    currentStroke:null,
    drawing:false,
    pointerId:null,
    snapGuide:null,
    laserPoints:[],
    laserHoverPoint:null,
    cssWidth:0,
    cssHeight:0,
    dpr:1,
    resizeFrame:0,
    laserFadeTimer:0,
    laserClearTimer:0,
    lastPointerClientX:null,
    lastPointerClientY:null
  };

  try {
    const storedColor = String(localStorage.getItem('mvip_word_pen_color') || '').trim();
    if (PEN_COLORS.some((entry) => entry.value === storedColor)) state.penColor = storedColor;
    const storedHighlighter = String(localStorage.getItem('mvip_highlighter_color') || '').trim();
    if (HIGHLIGHTER_COLORS.some((entry) => entry.value === storedHighlighter)) state.highlighterColor = storedHighlighter;
    const storedEraser = Number(localStorage.getItem('mvip_word_eraser_size') || 0);
    if (ERASER_SIZES.some((entry) => entry.value === storedEraser)) state.eraserWidth = storedEraser;
  } catch (_) {}

  function setSharedHighlighterColor(value, broadcast = true) {
    const next = String(value || '');
    if (!HIGHLIGHTER_COLORS.some((entry) => entry.value === next)) return false;
    state.highlighterColor = next;
    try { localStorage.setItem('mvip_highlighter_color', next); } catch (_) {}
    syncToolUi();
    if (broadcast) {
      document.dispatchEvent(new CustomEvent('mvip-highlighter-color-change', { detail:{ value:next } }));
    }
    return true;
  }
  document.addEventListener('mvip-highlighter-color-change', (event) => {
    setSharedHighlighterColor(event && event.detail && event.detail.value, false);
  });

  function modalIsOpen() {
    return modal.hidden === false && modal.getAttribute('aria-hidden') !== 'true';
  }

  function visualChild() {
    return Array.from(content.children).find((child) => child instanceof Element
      && !child.classList.contains('word-image-zoom-ink-canvas')
      && !child.classList.contains('word-image-zoom-eraser-cursor')) || null;
  }

  function closePopover() {
    popover.hidden = true;
    popover.removeAttribute('data-mode');
    configBtn.setAttribute('aria-expanded', 'false');
    eraserConfigBtn.setAttribute('aria-expanded', 'false');
  }

  function currentEraserDefinition() {
    return ERASER_SIZES.find((entry) => entry.value === state.eraserWidth) || ERASER_SIZES[1];
  }

  function configPreviewSize() {
    const entry = currentEraserDefinition();
    return Math.max(8, Math.min(22, entry.preview - 1));
  }

  function activeColorEntries() {
    return state.tool === 'highlighter' ? HIGHLIGHTER_COLORS.slice() : PEN_COLORS.slice();
  }

  function activeColorValue() {
    return state.tool === 'highlighter' ? state.highlighterColor : state.penColor;
  }

  function syncToolUi() {
    toolButtons.forEach((button, id) => {
      button.setAttribute('aria-pressed', id === state.tool ? 'true' : 'false');
    });
    if (canvas) {
      canvas.classList.toggle('is-active', state.tool !== 'cursor');
      canvas.dataset.tool = state.tool;
    }

    configBtn.hidden = false;
    configBtn.innerHTML = `<span class="word-image-zoom-ink-config-dot" aria-hidden="true" style="--zoom-ink-color:${activeColorValue()}"></span>`;
    configBtn.setAttribute('aria-label', state.tool === 'highlighter' ? 'Chọn màu bút nhớ' : 'Chọn màu bút viết');
    configBtn.title = state.tool === 'highlighter' ? 'Chọn màu bút nhớ' : 'Chọn màu bút viết';

    eraserConfigBtn.hidden = state.tool !== 'eraser';
    eraserConfigBtn.innerHTML = `<span class="word-image-zoom-ink-config-square" aria-hidden="true" style="--zoom-eraser-preview:${configPreviewSize()}px"></span>`;
    eraserConfigBtn.setAttribute('aria-label', 'Chọn kích thước tẩy');
    eraserConfigBtn.title = 'Chọn kích thước tẩy';

    if (state.tool === 'eraser') updateEraserCursorFromLastPoint();
    else hideEraserCursor();
    if (state.tool !== 'eraser' && popover.getAttribute('data-mode') === 'eraser') closePopover();
  }

  function buildPopover(mode = 'color') {
    popover.replaceChildren();
    if (mode === 'eraser') {
      popover.setAttribute('aria-label', 'Chọn kích thước tẩy');
      ERASER_SIZES.forEach((entry) => {
        const button = document.createElement('button');
        button.type = 'button';
        button.className = 'word-image-zoom-ink-size-btn';
        button.setAttribute('role', 'menuitemradio');
        button.setAttribute('aria-label', entry.name);
        button.setAttribute('aria-checked', entry.value === state.eraserWidth ? 'true' : 'false');
        button.title = `${entry.name} (${entry.value}px)`;
        button.innerHTML = `<span class="word-image-zoom-ink-size-square" aria-hidden="true" style="--zoom-eraser-size-preview:${entry.preview}px"></span>`;
        button.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          state.eraserWidth = entry.value;
          try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
          closePopover();
          syncToolUi();
          configBtn.focus({ preventScroll:true });
        });
        popover.appendChild(button);
      });
      return;
    }

    popover.setAttribute('aria-label', state.tool === 'highlighter' ? 'Chọn màu bút nhớ' : 'Chọn màu bút viết');
    activeColorEntries().forEach((entry) => {
      const button = document.createElement('button');
      button.type = 'button';
      button.className = 'word-image-zoom-ink-swatch';
      button.setAttribute('role', 'menuitemradio');
      button.setAttribute('aria-label', entry.name);
      button.setAttribute('aria-checked', entry.value === activeColorValue() ? 'true' : 'false');
      button.title = entry.name;
      button.style.setProperty('--zoom-ink-swatch', entry.value);
      button.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        if (state.tool === 'highlighter') {
          setSharedHighlighterColor(entry.value);
        } else {
          state.penColor = entry.value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
        }
        closePopover();
        syncToolUi();
        configBtn.focus({ preventScroll:true });
      });
      popover.appendChild(button);
    });
  }

  function openPopover(mode = 'color', trigger = configBtn) {
    buildPopover(mode);
    popover.setAttribute('data-mode', mode);
    popover.hidden = false;
    configBtn.setAttribute('aria-expanded', trigger === configBtn ? 'true' : 'false');
    eraserConfigBtn.setAttribute('aria-expanded', trigger === eraserConfigBtn ? 'true' : 'false');
    const first = popover.querySelector('[aria-checked="true"]') || popover.querySelector('button');
    if (first instanceof HTMLElement) requestAnimationFrame(() => first.focus({ preventScroll:true }));
  }

  function setTool(value) {
    const next = TOOL_IDS.has(String(value || '')) ? String(value) : 'cursor';
    if (state.drawing) finishStroke();
    if (state.tool === 'laser' && next !== 'laser') clearLaser();
    if (next !== 'eraser') hideEraserCursor();
    state.tool = next;
    closePopover();
    syncToolUi();
    if (next !== 'cursor') scheduleResize();
    return next;
  }

  function configureCanvas(target, cssWidth, cssHeight, dpr) {
    if (!(target instanceof HTMLCanvasElement)) return;
    const pixelWidth = Math.max(1, Math.round(cssWidth * dpr));
    const pixelHeight = Math.max(1, Math.round(cssHeight * dpr));
    if (target.width !== pixelWidth) target.width = pixelWidth;
    if (target.height !== pixelHeight) target.height = pixelHeight;
    target.style.width = `${cssWidth}px`;
    target.style.height = `${cssHeight}px`;
  }

  function clearPixels(target) {
    if (!(target instanceof HTMLCanvasElement)) return;
    const context = target.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(1, 0, 0, 1, 0, 0);
    context.clearRect(0, 0, target.width, target.height);
    context.restore();
  }

  function cssPoint(point) {
    return {
      x:Math.max(0, Math.min(state.cssWidth, Number(point && point.x) * state.cssWidth)),
      y:Math.max(0, Math.min(state.cssHeight, Number(point && point.y) * state.cssHeight))
    };
  }

  function strokeSettings(tool) {
    if (tool === 'eraser') return { width:state.eraserWidth, color:'#000', alpha:1, composite:'destination-out' };
    if (tool === 'highlighter') return { width:22, color:state.highlighterColor, alpha:.32, composite:'source-over' };
    return { width:2.6, color:state.penColor, alpha:1, composite:'source-over' };
  }

  function drawStroke(context, stroke, startIndex = 0) {
    const points = Array.isArray(stroke && stroke.points) ? stroke.points : [];
    if (!context || !points.length) return;
    const settings = stroke.settings || strokeSettings(stroke.tool);
    const firstIndex = Math.max(0, Math.min(points.length - 1, Number(startIndex) || 0));
    const first = cssPoint(points[firstIndex]);
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.lineWidth = Number(settings.width) || 2.6;
    context.strokeStyle = settings.color || '#ef4444';
    context.globalAlpha = Number.isFinite(Number(settings.alpha)) ? Number(settings.alpha) : 1;
    context.globalCompositeOperation = settings.composite || 'source-over';
    context.beginPath();
    context.moveTo(first.x, first.y);
    if (points.length === 1 || firstIndex === points.length - 1) {
      context.lineTo(first.x + .01, first.y + .01);
    } else if (stroke.tool === 'pen' && points.length - firstIndex >= 3) {
      for (let index = firstIndex + 1; index < points.length - 1; index += 1) {
        const control = cssPoint(points[index]);
        const next = cssPoint(points[index + 1]);
        context.quadraticCurveTo(control.x, control.y, (control.x + next.x) / 2, (control.y + next.y) / 2);
      }
      const last = cssPoint(points[points.length - 1]);
      context.quadraticCurveTo(last.x, last.y, last.x, last.y);
    } else {
      for (let index = firstIndex + 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
    }
    context.stroke();
    context.restore();
  }

  function redrawPersistent() {
    if (!canvas) return;
    clearPixels(canvas);
    const context = canvas.getContext('2d');
    if (!context) return;
    state.strokes.forEach((stroke) => drawStroke(context, stroke, 0));
    if (state.currentStroke) drawStroke(context, state.currentStroke, 0);
  }

  function stopLaserTimers() {
    if (state.laserFadeTimer) clearTimeout(state.laserFadeTimer);
    if (state.laserClearTimer) clearTimeout(state.laserClearTimer);
    state.laserFadeTimer = 0;
    state.laserClearTimer = 0;
    if (laserCanvas) {
      laserCanvas.classList.remove('is-fading');
      laserCanvas.style.opacity = '1';
    }
  }

  function clearLaser() {
    stopLaserTimers();
    state.laserPoints = [];
    state.laserHoverPoint = null;
    if (laserCanvas) clearPixels(laserCanvas);
  }

  function drawLaser() {
    if (!laserCanvas) return;
    clearPixels(laserCanvas);
    const points = state.drawing && state.tool === 'laser'
      ? state.laserPoints
      : (state.laserHoverPoint ? [state.laserHoverPoint] : []);
    if (!points.length) return;
    const context = laserCanvas.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
    context.lineCap = 'round';
    context.lineJoin = 'round';
    context.strokeStyle = '#ef4444';
    context.fillStyle = '#ef4444';
    context.lineWidth = 5.2;
    context.shadowColor = 'rgba(239,68,68,.92)';
    context.shadowBlur = 18;
    const first = cssPoint(points[0]);
    if (points.length > 1) {
      context.beginPath();
      context.moveTo(first.x, first.y);
      for (let index = 1; index < points.length; index += 1) {
        const point = cssPoint(points[index]);
        context.lineTo(point.x, point.y);
      }
      context.stroke();
    }
    const last = cssPoint(points[points.length - 1]);
    context.beginPath();
    context.arc(last.x, last.y, 8.8, 0, Math.PI * 2);
    context.fill();
    context.restore();
  }

  function scheduleLaserFade(delay = 360) {
    stopLaserTimers();
    state.laserFadeTimer = setTimeout(() => {
      state.laserFadeTimer = 0;
      if (laserCanvas) laserCanvas.classList.add('is-fading');
      state.laserClearTimer = setTimeout(() => {
        state.laserClearTimer = 0;
        state.laserPoints = [];
        state.laserHoverPoint = null;
        if (laserCanvas) {
          clearPixels(laserCanvas);
          laserCanvas.classList.remove('is-fading');
          laserCanvas.style.opacity = '1';
        }
      }, 500);
    }, Math.max(0, Number(delay) || 0));
  }

  function resizeCanvas() {
    if (!canvas || !laserCanvas || !canvas.isConnected || !laserCanvas.isConnected) return;
    const rect = content.getBoundingClientRect();
    const cssWidth = Math.max(1, Math.round(rect.width));
    const cssHeight = Math.max(1, Math.round(rect.height));
    const dpr = Math.max(1, Math.min(3, Number(window.devicePixelRatio) || 1));
    const changed = state.cssWidth !== cssWidth || state.cssHeight !== cssHeight || state.dpr !== dpr
      || canvas.width !== Math.round(cssWidth * dpr) || canvas.height !== Math.round(cssHeight * dpr);
    state.cssWidth = cssWidth;
    state.cssHeight = cssHeight;
    state.dpr = dpr;
    if (!changed) return;
    configureCanvas(canvas, cssWidth, cssHeight, dpr);
    configureCanvas(laserCanvas, cssWidth, cssHeight, dpr);
    redrawPersistent();
    drawLaser();
  }

  function scheduleResize() {
    if (state.resizeFrame) cancelAnimationFrame(state.resizeFrame);
    state.resizeFrame = requestAnimationFrame(() => {
      state.resizeFrame = 0;
      resizeCanvas();
    });
  }

  function hideEraserCursor() {
    if (eraserCursor) eraserCursor.classList.remove('is-visible');
  }

  function updateEraserCursorPosition(clientX, clientY) {
    if (!eraserCursor || state.tool !== 'eraser'
        || !Number.isFinite(Number(clientX)) || !Number.isFinite(Number(clientY))) {
      hideEraserCursor();
      return;
    }
    const rect = content.getBoundingClientRect();
    eraserCursor.style.setProperty('--zoom-eraser-cursor-size', `${state.eraserWidth}px`);
    eraserCursor.style.left = `${Number(clientX) - rect.left}px`;
    eraserCursor.style.top = `${Number(clientY) - rect.top}px`;
    eraserCursor.classList.add('is-visible');
  }

  function updateEraserCursor(event) {
    if (!event) return;
    state.lastPointerClientX = Number(event.clientX);
    state.lastPointerClientY = Number(event.clientY);
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }

  function updateEraserCursorFromLastPoint() {
    updateEraserCursorPosition(state.lastPointerClientX, state.lastPointerClientY);
  }

  function normalizedPointFromEvent(event) {
    const rect = canvas.getBoundingClientRect();
    const width = Math.max(1, rect.width);
    const height = Math.max(1, rect.height);
    const rawPoint = {
      x:Math.max(0, Math.min(1, (Number(event.clientX) - rect.left) / width)),
      y:Math.max(0, Math.min(1, (Number(event.clientY) - rect.top) / height))
    };
    if (state.tool !== 'pen' && state.tool !== 'highlighter') return rawPoint;
    const geometry = window.mvipImageZoomGeometryTool;
    if (!geometry || typeof geometry.snapInkPoint !== 'function') return rawPoint;
    try {
      const snapped = geometry.snapInkPoint(rawPoint, state.snapGuide);
      if (snapped && snapped.point) {
        if (!state.snapGuide && snapped.guide) state.snapGuide = snapped.guide;
        const rebased = snapped.guide && snapped.guide.rebaseStrokeStart;
        if (rebased && state.currentStroke && Array.isArray(state.currentStroke.points)) {
          state.currentStroke.points.forEach((_, index) => {
            state.currentStroke.points[index] = { x:rebased.x, y:rebased.y };
          });
          delete snapped.guide.rebaseStrokeStart;
        }
        return snapped.point;
      }
    } catch (_) {}
    return rawPoint;
  }

  function eventSamples(event) {
    try {
      const samples = typeof event.getCoalescedEvents === 'function' ? event.getCoalescedEvents() : null;
      return samples && samples.length ? Array.from(samples) : [event];
    } catch (_) {
      return [event];
    }
  }

  function beginStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor' || (event.pointerType === 'mouse' && event.button !== 0)) return;
    event.preventDefault();
    event.stopPropagation();
    resizeCanvas();
    state.drawing = true;
    state.pointerId = event.pointerId;
    state.snapGuide = null;
    try { canvas.setPointerCapture(event.pointerId); } catch (_) {}
    const point = normalizedPointFromEvent(event);
    if (state.tool === 'laser') {
      stopLaserTimers();
      state.laserHoverPoint = null;
      state.laserPoints = [point];
      drawLaser();
      return;
    }
    state.currentStroke = {
      tool:state.tool,
      settings:Object.assign({}, strokeSettings(state.tool)),
      points:[point]
    };
    const context = canvas.getContext('2d');
    if (context) drawStroke(context, state.currentStroke, 0);
  }

  function continueStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor') return;
    if (!state.drawing) {
      if (state.tool === 'laser') {
        stopLaserTimers();
        state.laserHoverPoint = normalizedPointFromEvent(event);
        drawLaser();
      }
      return;
    }
    if (event.pointerId !== state.pointerId) return;
    event.preventDefault();
    event.stopPropagation();
    const samples = eventSamples(event);
    if (state.tool === 'laser') {
      samples.forEach((sample) => state.laserPoints.push(normalizedPointFromEvent(sample)));
      drawLaser();
      return;
    }
    const stroke = state.currentStroke;
    if (!stroke) return;
    const oldLength = stroke.points.length;
    samples.forEach((sample) => stroke.points.push(normalizedPointFromEvent(sample)));
    if (stroke.tool === 'highlighter' || stroke.tool === 'pen') {
      redrawPersistent();
    } else {
      const context = canvas.getContext('2d');
      if (context) drawStroke(context, stroke, Math.max(0, oldLength - 1));
    }
  }

  function finishStroke(event) {
    if (!state.drawing) return;
    if (event && state.pointerId != null && event.pointerId !== state.pointerId) return;
    if (event) {
      event.preventDefault();
      event.stopPropagation();
      try { canvas.releasePointerCapture(event.pointerId); } catch (_) {}
    } else if (canvas && state.pointerId != null) {
      try { canvas.releasePointerCapture(state.pointerId); } catch (_) {}
    }
    if (state.tool === 'laser') {
      state.laserHoverPoint = null;
      scheduleLaserFade(380);
    } else if (state.currentStroke && state.currentStroke.points.length) {
      state.currentStroke.mvipUndoOrder = window.mvipDrawingHistory.stamp(content);
      state.strokes.push(state.currentStroke);
    }
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
  }

  function undoLastStroke() {
    if (state.drawing) finishStroke();
    if (!state.strokes.length) return false;
    state.strokes.pop();
    redrawPersistent();
    return true;
  }

  function resetDrawing(resetTool = true) {
    state.strokes = [];
    state.currentStroke = null;
    state.drawing = false;
    state.pointerId = null;
    state.snapGuide = null;
    state.laserPoints = [];
    state.laserHoverPoint = null;
    state.cssWidth = 0;
    state.cssHeight = 0;
    clearLaser();
    if (canvas) clearPixels(canvas);
    hideEraserCursor();
    closePopover();
    if (resetTool) state.tool = 'cursor';
    syncToolUi();
  }

  function bindCanvasEvents(target) {
    target.addEventListener('pointerdown', beginStroke);
    target.addEventListener('pointerenter', updateEraserCursor);
    target.addEventListener('pointermove', continueStroke);
    target.addEventListener('pointerup', finishStroke);
    target.addEventListener('pointercancel', finishStroke);
    target.addEventListener('lostpointercapture', () => finishStroke());
    target.addEventListener('pointerleave', () => {
      hideEraserCursor();
      if (state.tool === 'laser' && !state.drawing) scheduleLaserFade(0);
    });
  }

  function ensureOverlays() {
    if (canvas && canvas.isConnected && laserCanvas && laserCanvas.isConnected) return;
    canvas = document.createElement('canvas');
    canvas.className = 'word-presentation-ink-canvas word-image-zoom-ink-canvas';
    canvas.id = 'wordImageZoomInkCanvas';
    canvas.setAttribute('aria-hidden', 'true');

    laserCanvas = document.createElement('canvas');
    laserCanvas.className = 'word-presentation-ink-canvas word-presentation-laser-canvas word-image-zoom-ink-canvas word-image-zoom-laser-canvas';
    laserCanvas.id = 'wordImageZoomLaserCanvas';
    laserCanvas.setAttribute('aria-hidden', 'true');

    eraserCursor = document.createElement('div');
    eraserCursor.className = 'word-presentation-ink-eraser-cursor word-image-zoom-eraser-cursor';
    eraserCursor.id = 'wordImageZoomEraserCursor';
    eraserCursor.setAttribute('aria-hidden', 'true');

    bindCanvasEvents(canvas);
    content.append(canvas, laserCanvas, eraserCursor);
    syncToolUi();
    scheduleResize();
  }

  function syncModalState() {
    const visual = visualChild();
    if (!modalIsOpen() || !(visual instanceof Element)) {
      if (!modalIsOpen() && boundVisual) {
        boundVisual = null;
        resetDrawing(true);
      }
      return;
    }
    if (visual !== boundVisual) {
      boundVisual = visual;
      resetDrawing(true);
    }
    ensureOverlays();
    scheduleResize();
  }

  toolButtons.forEach((button, id) => {
    button.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      setTool(id);
      button.focus({ preventScroll:true });
    });
  });

  configBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    const same = !popover.hidden && popover.getAttribute('data-mode') === 'color';
    if (same) closePopover();
    else openPopover('color', configBtn);
  });

  eraserConfigBtn.addEventListener('click', (event) => {
    event.preventDefault();
    event.stopPropagation();
    const same = !popover.hidden && popover.getAttribute('data-mode') === 'eraser';
    if (same) closePopover();
    else openPopover('eraser', eraserConfigBtn);
  });

  document.addEventListener('pointerdown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    if (!target || tools.contains(target)) return;
    closePopover();
  }, true);

  document.addEventListener('keydown', (event) => {
    if (!modalIsOpen()) return;
    const target = event.target instanceof Element ? event.target : null;
    const editable = !!(target && target.closest('input, textarea, select, [contenteditable="true"]'));
    const undoShortcut = (event.ctrlKey || event.metaKey)
      && !event.altKey
      && !event.shiftKey
      && String(event.key || '').toLowerCase() === 'z';
    if (undoShortcut && !editable) {
      const geometryApi = window.mvipImageZoomGeometryTool;
      const geometryUndone = !!(geometryApi
        && typeof geometryApi.hasUndo === 'function'
        && geometryApi.hasUndo()
        && typeof geometryApi.undo === 'function'
        && geometryApi.undo());
      if (geometryUndone || undoLastStroke()) {
        event.preventDefault();
        event.stopImmediatePropagation();
      }
      return;
    }
    if (event.key === 'Escape' && !popover.hidden) {
      event.preventDefault();
      event.stopPropagation();
      const mode = popover.getAttribute('data-mode');
      closePopover();
      (mode === 'eraser' ? eraserConfigBtn : configBtn).focus({ preventScroll:true });
    }
  }, true);

  const modalObserver = typeof MutationObserver === 'function'
    ? new MutationObserver(() => requestAnimationFrame(syncModalState))
    : null;
  if (modalObserver) {
    modalObserver.observe(modal, { attributes:true, attributeFilter:['hidden', 'aria-hidden'] });
    modalObserver.observe(content, { childList:true });
  }

  if (typeof ResizeObserver === 'function') {
    const resizeObserver = new ResizeObserver(scheduleResize);
    resizeObserver.observe(content);
  }
  window.addEventListener('resize', scheduleResize);
  document.addEventListener('fullscreenchange', () => [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay)));
  document.addEventListener('webkitfullscreenchange', () => [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay)));

  syncToolUi();
  syncModalState();
  window.mvipDrawingHistory.register(content, 'ink', {
    peek:() => Number(state.strokes[state.strokes.length - 1]?.mvipUndoOrder) || 0,
    undo:undoLastStroke,
    finish:() => { if (state.drawing) finishStroke(); }
  });
  window.mvipImageZoomInkTool = {
    clear:() => resetDrawing(false),
    undo:() => window.mvipDrawingHistory.undo(content),
    tool:(value) => value == null ? state.tool : setTool(value),
    color:(value) => {
      if (value != null) {
        if (state.tool === 'highlighter' && HIGHLIGHTER_COLORS.some((entry) => entry.value === value)) {
          setSharedHighlighterColor(value);
        } else if (state.tool !== 'highlighter' && PEN_COLORS.some((entry) => entry.value === value)) {
          state.penColor = value;
          try { localStorage.setItem('mvip_word_pen_color', state.penColor); } catch (_) {}
          syncToolUi();
        }
      }
      return activeColorValue();
    },
    eraserSize:(value) => {
      const size = Number(value);
      if (ERASER_SIZES.some((entry) => entry.value === size)) {
        state.eraserWidth = size;
        try { localStorage.setItem('mvip_word_eraser_size', String(state.eraserWidth)); } catch (_) {}
        syncToolUi();
      }
      return state.eraserWidth;
    }
  };
})();
</script>


<!-- Bản điều chỉnh 2026-08-21: thanh công cụ dọc độc lập ở mép phải; không đổi position, không di chuyển bộ công cụ gốc và không can thiệp quá trình mở Word. -->
<style id="cv7991-independent-side-ink-dock-style-20260821">
  /* Chỉ ẩn bộ công cụ gốc trên thanh ngang sau khi dock độc lập đã được tạo. */
  #wordPresentationPresenter.cv7991-side-ink-ready #wordPresentationInkTools,
  #singleExamPresenter.cv7991-side-ink-ready #singleExamInkTools {
    display:none !important;
  }

  .cv7991-side-ink-dock {
    position:absolute;
    top:62px;
    right:7px;
    z-index:220;
    width:50px;
    min-width:50px;
    box-sizing:border-box;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:7px;
    padding:7px 4px;
    border:1px solid rgba(148,163,184,.84);
    border-radius:15px;
    background:rgba(255,255,255,.95);
    box-shadow:0 10px 27px rgba(15,23,42,.20);
    backdrop-filter:blur(7px);
    -webkit-backdrop-filter:blur(7px);
  }

  .cv7991-side-ink-tool,
  .cv7991-side-ink-config {
    width:40px;
    min-width:40px;
    height:40px;
    min-height:40px;
    box-sizing:border-box;
    padding:0;
    display:flex;
    align-items:center;
    justify-content:center;
    border:1px solid #cbd5e1;
    border-radius:11px;
    background:#fff;
    color:#334155;
    box-shadow:0 1px 3px rgba(15,23,42,.07);
    cursor:pointer;
  }

  .cv7991-side-ink-tool:hover,
  .cv7991-side-ink-tool[aria-pressed="true"],
  .cv7991-side-ink-config:hover,
  .cv7991-side-ink-config[aria-expanded="true"] {
    border-color:#2563eb;
    background:#eff6ff;
    color:#1d4ed8;
    box-shadow:0 0 0 2px rgba(37,99,235,.14);
  }

  .cv7991-side-ink-tool svg {
    width:20px;
    height:20px;
    display:block;
    pointer-events:none;
  }

  .cv7991-side-ink-config[hidden] { display:none !important; }

  .cv7991-side-ink-config-dot {
    width:19px;
    height:19px;
    box-sizing:border-box;
    border:2px solid #fff;
    border-radius:50%;
    background:var(--cv7991-side-ink-color, #ef4444);
    box-shadow:0 0 0 1px #64748b;
    pointer-events:none;
  }

  .cv7991-side-ink-config-square {
    width:var(--cv7991-side-eraser-preview, 16px);
    height:var(--cv7991-side-eraser-preview, 16px);
    min-width:8px;
    min-height:8px;
    max-width:23px;
    max-height:23px;
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.82);
    pointer-events:none;
  }

  .cv7991-side-ink-popover[hidden] { display:none !important; }
  .cv7991-side-ink-popover {
    position:absolute;
    top:58px;
    right:calc(100% + 8px);
    z-index:260;
    min-width:184px;
    box-sizing:border-box;
    display:grid;
    grid-template-columns:repeat(4, 34px);
    justify-content:center;
    gap:8px;
    padding:10px;
    border:1px solid #cbd5e1;
    border-radius:12px;
    background:#fff;
    box-shadow:0 16px 38px rgba(15,23,42,.28);
  }

  .cv7991-side-ink-choice {
    width:34px;
    min-width:34px;
    height:34px;
    min-height:34px;
    padding:0;
    display:flex;
    align-items:center;
    justify-content:center;
    border:2px solid #e2e8f0;
    border-radius:50%;
    background:var(--cv7991-side-choice-color, #fff);
    box-shadow:inset 0 0 0 3px #fff;
    cursor:pointer;
  }

  .cv7991-side-ink-choice.is-size {
    border-radius:8px;
    background:#fff;
    box-shadow:none;
  }

  .cv7991-side-ink-choice:hover,
  .cv7991-side-ink-choice[aria-checked="true"] {
    border-color:#0f172a;
    transform:scale(1.05);
  }

  .cv7991-side-ink-size-square {
    width:var(--cv7991-side-size-preview, 16px);
    height:var(--cv7991-side-size-preview, 16px);
    box-sizing:border-box;
    border:2px solid #334155;
    border-radius:2px;
    background:rgba(255,255,255,.82);
    pointer-events:none;
  }

  @media (max-width:760px), (max-height:560px) {
    .cv7991-side-ink-dock {
      top:55px;
      right:4px;
      width:42px;
      min-width:42px;
      gap:5px;
      padding:5px 3px;
      border-radius:13px;
    }
    .cv7991-side-ink-tool,
    .cv7991-side-ink-config {
      width:34px;
      min-width:34px;
      height:34px;
      min-height:34px;
      border-radius:9px;
    }
    .cv7991-side-ink-tool svg {
      width:17px;
      height:17px;
    }
    .cv7991-side-ink-popover {
      right:calc(100% + 5px);
      top:45px;
    }
  }
</style>
<script id="cv7991-independent-side-ink-dock-script-20260821">
(() => {
  'use strict';

  const ICONS = Object.freeze({
    cursor:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 3.5 18.2 13l-6.1 1.1 3.4 5.1-2.8 1.8-3.3-5.2L5 20V3.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    pen:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 20l4.2-1 10.4-10.4a2.1 2.1 0 0 0 0-3L18.4 5.4a2.1 2.1 0 0 0-3 0L5 15.8 4 20Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="m13.9 6.9 3.2 3.2M4 20h5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    eraser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m7.2 18.7-3.1-3.1a2 2 0 0 1 0-2.8l8.5-8.5a2 2 0 0 1 2.8 0l4.3 4.3a2 2 0 0 1 0 2.8l-7.3 7.3H7.2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m9.2 7.7 7.1 7.1M7.2 18.7H20" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    laser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 19 15.7 8.3l-3-3L2 16l3 3Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m13.4 10.6 2.8 2.8M17.5 4.5 20 2M19.5 8H23M16 1v3.5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    highlighter:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m5 14 8.8-8.8 5 5L10 19H5v-5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m11.5 7.5 5 5M3 22h18" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>'
  });

  const TOOLS = Object.freeze([
    { id:'cursor', label:'Con trỏ chuột' },
    { id:'pen', label:'Bút' },
    { id:'eraser', label:'Tẩy' },
    { id:'laser', label:'Bút laze' },
    { id:'highlighter', label:'Bút nhớ' }
  ]);
  const PEN_COLORS = Object.freeze([
    { value:'#ef4444', label:'Đỏ' },
    { value:'#7c3aed', label:'Tím' },
    { value:'#facc15', label:'Vàng' },
    { value:'#2563eb', label:'Xanh' }
  ]);
  const ERASER_SIZES = Object.freeze([
    { value:52, preview:24, label:'Tẩy rất to' },
    { value:38, preview:19, label:'Tẩy to' },
    { value:26, preview:14, label:'Tẩy vừa' },
    { value:16, preview:9, label:'Tẩy nhỏ' }
  ]);
  const HIGHLIGHTER_COLORS = Object.freeze([
    { value:'#A8FF00', label:'Xanh huỳnh quang hiện tại' },
    { value:'#D4FF00', label:'Vàng xanh huỳnh quang' },
    { value:'#FF4FA3', label:'Hồng' },
    { value:'#A855F7', label:'Tím' }
  ]);

  function buildDock(options) {
    const presenter = document.getElementById(options.presenterId);
    const api = window[options.apiName];
    if (!(presenter instanceof HTMLElement) || !api || typeof api.tool !== 'function') return false;
    if (document.getElementById(options.dockId)) return true;

    const dock = document.createElement('div');
    dock.id = options.dockId;
    dock.className = 'cv7991-side-ink-dock';
    dock.setAttribute('role', 'toolbar');
    dock.setAttribute('aria-label', 'Bộ công cụ viết vẽ');

    const toolButtons = new Map();
    TOOLS.forEach((entry) => {
      const button = document.createElement('button');
      button.type = 'button';
      button.className = 'cv7991-side-ink-tool';
      button.setAttribute('data-side-ink-tool', entry.id);
      button.setAttribute('aria-label', entry.label);
      button.title = entry.label;
      button.innerHTML = ICONS[entry.id];
      button.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        closePopover();
        api.tool(entry.id);
        syncUi();
      });
      toolButtons.set(entry.id, button);
      dock.appendChild(button);
    });

    const configButton = document.createElement('button');
    configButton.type = 'button';
    configButton.className = 'cv7991-side-ink-config cv7991-side-ink-color-config';
    configButton.setAttribute('aria-haspopup', 'menu');
    configButton.setAttribute('aria-expanded', 'false');
    configButton.hidden = false;

    const eraserConfigButton = document.createElement('button');
    eraserConfigButton.type = 'button';
    eraserConfigButton.className = 'cv7991-side-ink-config cv7991-side-ink-eraser-config';
    eraserConfigButton.setAttribute('aria-haspopup', 'menu');
    eraserConfigButton.setAttribute('aria-expanded', 'false');
    eraserConfigButton.hidden = true;

    dock.append(configButton, eraserConfigButton);

    const popover = document.createElement('div');
    popover.className = 'cv7991-side-ink-popover';
    popover.hidden = true;
    popover.setAttribute('role', 'menu');
    dock.appendChild(popover);

    function closePopover() {
      popover.hidden = true;
      popover.removeAttribute('data-mode');
      configButton.setAttribute('aria-expanded', 'false');
      eraserConfigButton.setAttribute('aria-expanded', 'false');
    }

    function buildColorChoices() {
      popover.replaceChildren();
      const current = String(api.color ? api.color() : '#ef4444');
      const entries = String(api.tool() || 'cursor') === 'highlighter' ? HIGHLIGHTER_COLORS : PEN_COLORS;
      entries.forEach((entry) => {
        const choice = document.createElement('button');
        choice.type = 'button';
        choice.className = 'cv7991-side-ink-choice';
        choice.style.setProperty('--cv7991-side-choice-color', entry.value);
        choice.setAttribute('aria-label', entry.label);
        choice.title = entry.label;
        choice.setAttribute('aria-checked', entry.value === current ? 'true' : 'false');
        choice.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          if (typeof api.color === 'function') api.color(entry.value);
          closePopover();
          syncUi();
        });
        popover.appendChild(choice);
      });
    }

    function buildEraserChoices() {
      popover.replaceChildren();
      const current = Number(api.eraserSize ? api.eraserSize() : 38);
      ERASER_SIZES.forEach((entry) => {
        const choice = document.createElement('button');
        choice.type = 'button';
        choice.className = 'cv7991-side-ink-choice is-size';
        choice.setAttribute('aria-label', entry.label);
        choice.title = entry.label;
        choice.setAttribute('aria-checked', entry.value === current ? 'true' : 'false');
        choice.innerHTML = `<span class="cv7991-side-ink-size-square" style="--cv7991-side-size-preview:${entry.preview}px"></span>`;
        choice.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          if (typeof api.eraserSize === 'function') api.eraserSize(entry.value);
          closePopover();
          syncUi();
        });
        popover.appendChild(choice);
      });
    }

    configButton.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      const alreadyOpen = !popover.hidden && popover.getAttribute('data-mode') === 'color';
      if (alreadyOpen) {
        closePopover();
        return;
      }
      buildColorChoices();
      popover.setAttribute('data-mode', 'color');
      popover.hidden = false;
      configButton.setAttribute('aria-expanded', 'true');
      eraserConfigButton.setAttribute('aria-expanded', 'false');
    });

    eraserConfigButton.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      const alreadyOpen = !popover.hidden && popover.getAttribute('data-mode') === 'eraser';
      if (alreadyOpen) {
        closePopover();
        return;
      }
      buildEraserChoices();
      popover.setAttribute('data-mode', 'eraser');
      popover.hidden = false;
      eraserConfigButton.setAttribute('aria-expanded', 'true');
      configButton.setAttribute('aria-expanded', 'false');
    });

    function syncUi() {
      const tool = String(api.tool() || 'cursor');
      toolButtons.forEach((button, id) => {
        button.setAttribute('aria-pressed', id === tool ? 'true' : 'false');
      });

      const color = String(api.color ? api.color() : '#ef4444');
      configButton.hidden = false;
      configButton.title = tool === 'highlighter' ? 'Chọn màu bút nhớ' : 'Chọn màu bút vẽ';
      configButton.setAttribute('aria-label', configButton.title);
      configButton.innerHTML = `<span class="cv7991-side-ink-config-dot" style="--cv7991-side-ink-color:${color}"></span>`;

      const width = Number(api.eraserSize ? api.eraserSize() : 38);
      const def = ERASER_SIZES.find((entry) => entry.value === width) || ERASER_SIZES[1];
      eraserConfigButton.hidden = tool !== 'eraser';
      eraserConfigButton.title = 'Chọn kích thước tẩy';
      eraserConfigButton.setAttribute('aria-label', 'Chọn kích thước tẩy');
      eraserConfigButton.innerHTML = `<span class="cv7991-side-ink-config-square" style="--cv7991-side-eraser-preview:${Math.max(8, Math.min(23, def.preview))}px"></span>`;

      if (tool !== 'eraser' && popover.getAttribute('data-mode') === 'eraser') closePopover();
    }

    document.addEventListener('pointerdown', (event) => {
      if (!popover.hidden && event.target instanceof Node && !dock.contains(event.target)) closePopover();
    }, true);

    document.addEventListener('keydown', (event) => {
      if (event.key === 'Escape') closePopover();
    });

    /* Không đóng bảng màu theo mọi thay đổi class của presenter. Word/PDF/Excel
       thường đổi class khi co trang, đổi bố cục hoặc bật bút, khiến menu vừa
       mở đã bị closePopover() ngay. Chỉ đóng khi presenter thật sự bị ẩn. */
    const presenterObserver = new MutationObserver((records) => {
      if (presenter.hidden && records.some((record) => record.attributeName === 'hidden')) closePopover();
      requestAnimationFrame(syncUi);
    });
    presenterObserver.observe(presenter, { attributes:true, attributeFilter:['hidden'] });

    presenter.appendChild(dock);
    presenter.classList.add('cv7991-side-ink-ready');
    syncUi();
    return true;
  }

  const wordReady = buildDock({
    presenterId:'wordPresentationPresenter',
    apiName:'mvipWordInkTool',
    dockId:'wordPresentationSideInkDock'
  });
  const mvipReady = buildDock({
    presenterId:'singleExamPresenter',
    apiName:'mvipSingleExamInkTool',
    dockId:'singleExamSideInkDock'
  });

  /* Nếu một API chưa sẵn sàng ở đúng thời điểm cuối trang, thử lại rất ngắn;
     chỉ đọc trạng thái, không đụng đến presenter hay quy trình tải Word. */
  if (!wordReady || !mvipReady) {
    let attempts = 0;
    const timer = window.setInterval(() => {
      attempts += 1;
      const a = document.getElementById('wordPresentationSideInkDock') || buildDock({
        presenterId:'wordPresentationPresenter', apiName:'mvipWordInkTool', dockId:'wordPresentationSideInkDock'
      });
      const b = document.getElementById('singleExamSideInkDock') || buildDock({
        presenterId:'singleExamPresenter', apiName:'mvipSingleExamInkTool', dockId:'singleExamSideInkDock'
      });
      if ((a && b) || attempts >= 20) window.clearInterval(timer);
    }, 200);
  }
})();
</script>


<!-- Bản điều chỉnh 2026-08-25: đưa biểu tượng màu/cỡ sau công cụ tương ứng; thêm Hoàn tác và thùng rác Xóa toàn bộ ở cuối thanh công cụ. -->
<style id="cv7991-color-after-pen-and-undo-style-20260821">
  .cv7991-side-ink-undo,
  .word-image-zoom-ink-undo-btn,
  .cv7991-side-ink-clear,
  .word-image-zoom-ink-clear-btn {
    color:#334155;
  }
  .cv7991-side-ink-undo:hover,
  .word-image-zoom-ink-undo-btn:hover {
    border-color:#7c3aed !important;
    background:#f5f3ff !important;
    color:#6d28d9 !important;
  }
  .cv7991-side-ink-clear:hover,
  .word-image-zoom-ink-clear-btn:hover {
    border-color:#dc2626 !important;
    background:#fef2f2 !important;
    color:#dc2626 !important;
  }
  .cv7991-side-ink-undo:active,
  .word-image-zoom-ink-undo-btn:active,
  .cv7991-side-ink-clear:active,
  .word-image-zoom-ink-clear-btn:active {
    transform:translateY(1px);
  }
  .cv7991-side-ink-undo svg,
  .word-image-zoom-ink-undo-btn svg,
  .cv7991-side-ink-clear svg,
  .word-image-zoom-ink-clear-btn svg {
    width:19px;
    height:19px;
    display:block;
    pointer-events:none;
  }
  .cv7991-side-ink-undo span,
  .cv7991-side-ink-clear span { display:none !important; }
  @media (max-width:980px) {
    .word-image-zoom-ink-undo-btn,
    .word-image-zoom-ink-clear-btn {
      width:34px;
      min-width:34px;
      padding:0;
    }
    .word-image-zoom-ink-undo-btn span,
    .word-image-zoom-ink-clear-btn span { display:none; }
  }
  @media (max-width:560px) {
    .word-image-zoom-ink-undo-btn,
    .word-image-zoom-ink-clear-btn {
      width:31px;
      min-width:31px;
      height:31px;
      min-height:31px;
      border-radius:7px;
    }
    .cv7991-side-ink-undo svg,
    .word-image-zoom-ink-undo-btn svg,
    .cv7991-side-ink-clear svg,
    .word-image-zoom-ink-clear-btn svg {
      width:17px;
      height:17px;
    }
  }
</style>
<script id="cv7991-color-after-pen-and-undo-script-20260821">
(() => {
  'use strict';

  const UNDO_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M9 7H4.5V2.5" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/><path d="M5 7.1A8.2 8.2 0 1 1 4.8 16.4" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
  const CLEAR_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 7h16M9 7V4h6v3M7 7l1 13h8l1-13M10 11v5M14 11v5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';

  function enhanceSideDock(options) {
    const dock = document.getElementById(options.dockId);
    const api = window[options.apiName];
    if (!(dock instanceof HTMLElement) || !api || typeof api.undo !== 'function' || typeof api.tool !== 'function') return false;

    if (typeof dock._cv7991ArrangeInkControls === 'function') {
      dock._cv7991ArrangeInkControls();
      return true;
    }

    const configButton = dock.querySelector('.cv7991-side-ink-color-config');
    const eraserConfigButton = dock.querySelector('.cv7991-side-ink-eraser-config');
    const popover = dock.querySelector('.cv7991-side-ink-popover');
    if (!(configButton instanceof HTMLElement) || !(eraserConfigButton instanceof HTMLElement) || !(popover instanceof HTMLElement)) return false;

    let undoButton = document.getElementById(options.undoId);
    if (!(undoButton instanceof HTMLButtonElement)) {
      undoButton = document.createElement('button');
      undoButton.type = 'button';
      undoButton.id = options.undoId;
      undoButton.className = 'cv7991-side-ink-tool cv7991-side-ink-undo';
      undoButton.setAttribute('aria-label', 'Hoàn tác nét vừa vẽ');
      undoButton.title = 'Hoàn tác nét vừa vẽ (Ctrl + Z)';
      undoButton.innerHTML = UNDO_ICON;
      undoButton.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        api.undo();
        undoButton.focus({ preventScroll:true });
      });
    }

    let clearButton = document.getElementById(options.clearId);
    if (!(clearButton instanceof HTMLButtonElement)) {
      clearButton = document.createElement('button');
      clearButton.type = 'button';
      clearButton.id = options.clearId;
      clearButton.className = 'cv7991-side-ink-tool cv7991-side-ink-clear';
      clearButton.setAttribute('aria-label', 'Xóa toàn bộ nét viết và hình vẽ');
      clearButton.title = 'Xóa toàn bộ nét viết và hình vẽ';
      clearButton.innerHTML = CLEAR_ICON;
      clearButton.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        if (typeof api.clear === 'function') api.clear();
        const geometry = window[options.geometryApiName];
        if (geometry && typeof geometry.clear === 'function') geometry.clear(false);
        clearButton.focus({ preventScroll:true });
      });
    }

    const arrange = () => {
      const penAnchor = dock.querySelector('[data-side-ink-tool="pen"]');
      const eraserAnchor = dock.querySelector('[data-side-ink-tool="eraser"]');
      if (penAnchor instanceof HTMLElement && penAnchor.nextElementSibling !== configButton) penAnchor.after(configButton);
      if (eraserAnchor instanceof HTMLElement && eraserAnchor.nextElementSibling !== eraserConfigButton) eraserAnchor.after(eraserConfigButton);
      if (clearButton.parentNode !== dock || clearButton.nextElementSibling !== popover) dock.insertBefore(clearButton, popover);
      if (undoButton.parentNode !== dock || undoButton.nextElementSibling !== clearButton) dock.insertBefore(undoButton, clearButton);
    };

    dock._cv7991ArrangeInkControls = arrange;
    dock.addEventListener('click', (event) => {
      const target = event.target instanceof Element ? event.target.closest('[data-side-ink-tool]') : null;
      if (target) requestAnimationFrame(arrange);
    });
    arrange();
    return true;
  }

  function enhanceZoomToolbar() {
    const tools = document.getElementById('wordImageZoomInkTools');
    const configButton = document.getElementById('wordImageZoomInkConfigBtn');
    const eraserConfigButton = document.getElementById('wordImageZoomEraserConfigBtn');
    const popover = document.getElementById('wordImageZoomInkPopover');
    const api = window.mvipImageZoomInkTool;
    if (!(tools instanceof HTMLElement)
        || !(configButton instanceof HTMLElement)
        || !(eraserConfigButton instanceof HTMLElement)
        || !(popover instanceof HTMLElement)
        || !api
        || typeof api.undo !== 'function'
        || typeof api.tool !== 'function') return false;

    if (typeof tools._cv7991ArrangeInkControls === 'function') {
      tools._cv7991ArrangeInkControls();
      return true;
    }

    let undoButton = document.getElementById('wordImageZoomInkUndoBtn');
    if (!(undoButton instanceof HTMLButtonElement)) {
      undoButton = document.createElement('button');
      undoButton.type = 'button';
      undoButton.id = 'wordImageZoomInkUndoBtn';
      undoButton.className = 'word-image-zoom-ink-tool-btn word-image-zoom-ink-undo-btn';
      undoButton.setAttribute('aria-label', 'Hoàn tác nét vừa vẽ');
      undoButton.title = 'Hoàn tác nét vừa vẽ (Ctrl + Z)';
      undoButton.innerHTML = `${UNDO_ICON}<span>Hoàn tác</span>`;
      undoButton.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        api.undo();
        undoButton.focus({ preventScroll:true });
      });
    }

    let clearButton = document.getElementById('wordImageZoomInkClearBtn');
    if (!(clearButton instanceof HTMLButtonElement)) {
      clearButton = document.createElement('button');
      clearButton.type = 'button';
      clearButton.id = 'wordImageZoomInkClearBtn';
      clearButton.className = 'word-image-zoom-ink-tool-btn word-image-zoom-ink-clear-btn';
      clearButton.setAttribute('aria-label', 'Xóa toàn bộ nét viết và hình vẽ');
      clearButton.title = 'Xóa toàn bộ nét viết và hình vẽ';
      clearButton.innerHTML = `${CLEAR_ICON}<span>Xóa toàn bộ</span>`;
      clearButton.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        if (typeof api.clear === 'function') api.clear();
        const geometry = window.mvipImageZoomGeometryTool;
        if (geometry && typeof geometry.clear === 'function') geometry.clear(false);
        clearButton.focus({ preventScroll:true });
      });
    }

    const arrange = () => {
      const penAnchor = tools.querySelector('[data-zoom-ink-tool="pen"]');
      const eraserAnchor = tools.querySelector('[data-zoom-ink-tool="eraser"]');
      if (penAnchor instanceof HTMLElement && penAnchor.nextElementSibling !== configButton) penAnchor.after(configButton);
      if (eraserAnchor instanceof HTMLElement && eraserAnchor.nextElementSibling !== eraserConfigButton) eraserAnchor.after(eraserConfigButton);
      if (clearButton.parentNode !== tools || clearButton.nextElementSibling !== popover) tools.insertBefore(clearButton, popover);
      if (undoButton.parentNode !== tools || undoButton.nextElementSibling !== clearButton) tools.insertBefore(undoButton, clearButton);
    };

    tools._cv7991ArrangeInkControls = arrange;
    tools.addEventListener('click', (event) => {
      const target = event.target instanceof Element ? event.target.closest('[data-zoom-ink-tool]') : null;
      if (target) requestAnimationFrame(arrange);
    });
    arrange();
    return true;
  }

  function applyEnhancements() {
    const wordReady = enhanceSideDock({
      dockId:'wordPresentationSideInkDock',
      apiName:'mvipWordInkTool',
      undoId:'wordPresentationSideInkUndoBtn',
      clearId:'wordPresentationSideInkClearBtn',
      geometryApiName:'mvipWordGeometryTool'
    });
    const mvipReady = enhanceSideDock({
      dockId:'singleExamSideInkDock',
      apiName:'mvipSingleExamInkTool',
      undoId:'singleExamSideInkUndoBtn',
      clearId:'singleExamSideInkClearBtn',
      geometryApiName:'mvipSingleExamGeometryTool'
    });
    const zoomReady = enhanceZoomToolbar();
    return wordReady && mvipReady && zoomReady;
  }

  if (!applyEnhancements()) {
    let attempts = 0;
    const timer = window.setInterval(() => {
      attempts += 1;
      if (applyEnhancements() || attempts >= 30) window.clearInterval(timer);
    }, 200);
  }
})();
</script>


<!-- Bản điều chỉnh 2026-08-22: nút Bài giảng đọc danh sách DOCX qua API Python /api/bai-giang/files; không cần PHP, rồi mở bằng đúng bộ Trình chiếu Word hiện có. -->
<style id="mvip-server-lesson-plans-style-20260822">
  .lesson-plan-start-btn {
    min-height:30px;
    padding:0 12px;
    border:1px solid #0891b2;
    border-radius:9px;
    background:#ecfeff;
    color:#0e7490;
    font-weight:900;
    cursor:pointer;
    white-space:nowrap;
    display:none;
    align-items:center;
    justify-content:center;
    gap:6px;
  }
  #lessonPlanStartBtn[data-server-lesson-access="true"]:not([hidden]) {
    display:inline-flex;
  }
  #lessonPlanStartBtn[hidden],
  #lessonPlanStartBtn:not([data-server-lesson-access="true"]) {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }
  .lesson-plan-start-btn:hover:not(:disabled) {
    border-color:#0e7490;
    background:#cffafe;
  }
  .lesson-plan-start-btn:disabled {
    opacity:.5;
    cursor:not-allowed;
  }
  body.desktop-fixed-right .lesson-plan-start-btn {
    min-height:28px;
    padding:0 8px;
    border-radius:8px;
    font-size:11px;
  }
  body.exam-mode-expanded #lessonPlanStartBtn { display:none !important; }

  .lesson-plan-modal[hidden] { display:none !important; }
  .lesson-plan-modal {
    position:fixed;
    inset:0;
    z-index:12550;
  }
  .lesson-plan-modal-backdrop {
    position:absolute;
    inset:0;
    background:rgba(15,23,42,.56);
    backdrop-filter:blur(3px);
  }
  .lesson-plan-dialog {
    position:absolute;
    inset:0;
    transform:none;
    width:100vw;
    height:100vh;
    max-width:none;
    max-height:none;
    overflow:hidden;
    display:flex;
    flex-direction:column;
    border:0;
    border-radius:0;
    background:#f8fdff;
    box-shadow:none;
  }
  .lesson-plan-head {
    flex:0 0 auto;
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:16px;
    padding:15px 17px;
    border-bottom:1px solid #bae6fd;
    background:linear-gradient(180deg,#ecfeff,#f0f9ff);
  }
  .lesson-plan-head h3 {
    margin:0;
    color:#0e7490;
    font-size:24px;
    line-height:1.2;
  }
  .lesson-plan-current-class {
    margin-top:4px;
    color:#475569;
    font-size:13px;
    font-weight:800;
  }
  .lesson-plan-head-actions {
    display:flex;
    align-items:center;
    gap:8px;
  }
  .lesson-plan-refresh-btn,
  .lesson-plan-close-btn {
    min-height:36px;
    padding:0 13px;
    border-radius:10px;
    background:#fff;
    font-weight:900;
    cursor:pointer;
  }
  .lesson-plan-refresh-btn {
    border:1px solid #0891b2;
    color:#0e7490;
  }
  .lesson-plan-close-btn {
    border:1px solid #ef4444;
    color:#dc2626;
  }
  .lesson-plan-refresh-btn:disabled { opacity:.55; cursor:wait; }
  .lesson-plan-body {
    flex:1 1 auto;
    min-height:0;
    overflow:auto;
    padding:16px;
    overscroll-behavior:contain;
  }
  .lesson-plan-status {
    margin-bottom:12px;
    padding:10px 12px;
    border:1px solid #cbd5e1;
    border-radius:12px;
    background:#fff;
    color:#475569;
    font-size:14px;
    font-weight:750;
    line-height:1.45;
  }
  .lesson-plan-status.ok {
    border-color:#86efac;
    background:#f0fdf4;
    color:#166534;
  }
  .lesson-plan-status.err {
    border-color:#fca5a5;
    background:#fef2f2;
    color:#b91c1c;
  }
  .lesson-plan-list {
    display:grid;
    grid-template-columns:1fr;
    gap:11px;
  }
  .lesson-plan-file-btn {
    min-width:0;
    min-height:78px;
    padding:11px 13px;
    display:flex;
    align-items:center;
    gap:12px;
    border:1px solid #bae6fd;
    border-radius:14px;
    background:#fff;
    color:#0f172a;
    text-align:left;
    cursor:pointer;
    box-shadow:0 3px 10px rgba(14,116,144,.07);
    transition:transform .14s ease, border-color .14s ease, box-shadow .14s ease, background .14s ease;
  }
  .lesson-plan-file-btn:hover:not(:disabled),
  .lesson-plan-file-btn:focus-visible {
    transform:translateY(-2px);
    border-color:#0891b2;
    background:#ecfeff;
    box-shadow:0 8px 20px rgba(14,116,144,.14);
    outline:none;
  }
  .lesson-plan-file-btn:disabled { opacity:.58; cursor:wait; transform:none; }
  .lesson-plan-file-icon {
    flex:0 0 42px;
    width:42px;
    height:48px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:10px;
    background:#e0f2fe;
    color:#0369a1;
    font-size:27px;
  }
  .lesson-plan-file-text {
    min-width:0;
    display:flex;
    flex-direction:column;
    gap:5px;
  }
  .lesson-plan-file-title {
    color:#0f172a;
    font-size:16px;
    line-height:1.3;
    font-weight:900;
    overflow-wrap:anywhere;
  }
  .lesson-plan-file-name {
    display:none !important;
  }
  .lesson-plan-file-card {
    min-width:0;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    align-items:stretch;
    overflow:hidden;
    border:1px solid #bae6fd;
    border-radius:14px;
    background:#fff;
    box-shadow:0 3px 10px rgba(14,116,144,.07);
    transition:transform .14s ease, border-color .14s ease, box-shadow .14s ease;
  }
  .lesson-plan-file-card:hover,
  .lesson-plan-file-card:focus-within {
    transform:translateY(-2px);
    border-color:#0891b2;
    box-shadow:0 8px 20px rgba(14,116,144,.14);
  }
  .lesson-plan-file-card .lesson-plan-file-btn {
    grid-column:1;
    grid-row:1;
    width:100%;
    min-width:0;
    min-height:78px;
    border:0;
    border-radius:0;
    box-shadow:none;
  }
  .lesson-plan-file-card .lesson-plan-file-btn:hover:not(:disabled),
  .lesson-plan-file-card .lesson-plan-file-btn:focus-visible {
    transform:none;
    border-color:transparent;
    box-shadow:none;
  }
  .lesson-plan-file-actions {
    grid-column:2;
    grid-row:1;
    min-width:252px;
    display:flex;
    align-items:center;
    justify-content:flex-end;
    align-self:stretch;
    gap:8px;
    padding:10px 11px;
    border-left:1px solid #e0f2fe;
    border-top:0;
    background:#f8fdff;
    white-space:nowrap;
  }
  .lesson-plan-export-btn {
    min-height:34px;
    padding:0 11px;
    border-radius:9px;
    background:#fff;
    font:inherit;
    font-size:12px;
    font-weight:900;
    cursor:pointer;
    white-space:nowrap;
  }
  .lesson-plan-export-original-btn {
    border:1px solid #0284c7;
    color:#0369a1;
  }
  .lesson-plan-export-print-btn {
    border:1px solid #ea580c;
    color:#c2410c;
  }
  .lesson-plan-export-btn:hover:not(:disabled) {
    background:#eff6ff;
    transform:translateY(-1px);
  }
  .lesson-plan-export-print-btn:hover:not(:disabled) { background:#fff7ed; }
  .lesson-print-options-dialog { width:min(460px, calc(100vw - 32px)); max-height:calc(100dvh - 32px); overflow:auto; padding:0; border:1px solid #cbd5e1; border-radius:16px; color:#0f172a; background:#fff; box-shadow:0 24px 70px #0f172a55; font-family:inherit; }
  .lesson-print-options-dialog::backdrop { background:#0f172a88; }
  .lesson-print-options-form { padding:24px; }
  .lesson-print-options-form h3 { margin:0 0 8px; font-size:24px; }
  .lesson-print-options-form p { margin:8px 0 16px; font-size:16px; }
  .lesson-print-options-file { color:#475569; overflow-wrap:anywhere; }
  .lesson-print-options-form label { display:flex; gap:12px; align-items:center; min-height:48px; cursor:pointer; font-size:20px; font-weight:700; }
  .lesson-print-options-form input { width:20px; height:20px; flex:0 0 20px; accent-color:#2563eb; }
  .lesson-print-options-actions { display:flex; flex-wrap:wrap; justify-content:flex-end; gap:10px; margin-top:22px; }
  .lesson-plan-export-btn:disabled { opacity:.56; cursor:wait; transform:none; }
  .word-presentation-lesson-check-btn {
    min-height:34px;
    padding:0 11px;
    border:1px solid #14b8a6 !important;
    border-radius:9px;
    background:#f0fdfa !important;
    color:#0f766e !important;
    font-weight:900;
    cursor:pointer;
    white-space:nowrap;
  }
  .word-presentation-lesson-check-btn:hover:not(:disabled) {
    border-color:#0f766e !important;
    background:#ccfbf1 !important;
  }
  .word-presentation-lesson-check-btn:disabled { opacity:.5; cursor:wait; }
  .lesson-plan-empty {
    grid-column:1 / -1;
    padding:28px 16px;
    border:1px dashed #94a3b8;
    border-radius:14px;
    background:#fff;
    color:#64748b;
    text-align:center;
    font-weight:800;
  }
  @media (max-width:620px) {
    .lesson-plan-dialog { inset:0; width:100vw; height:100vh; max-height:none; border-radius:0; }
    .lesson-plan-head { padding:11px; gap:8px; }
    .lesson-plan-head h3 { font-size:20px; }
    .lesson-plan-head-actions { flex-direction:column; align-items:stretch; }
    .lesson-plan-refresh-btn, .lesson-plan-close-btn { min-height:32px; padding:0 9px; font-size:12px; }
    .lesson-plan-body { padding:10px; }
    .lesson-plan-list { grid-template-columns:1fr; gap:8px; }
    .lesson-plan-file-card { grid-template-columns:minmax(0,1fr) auto; }
    .lesson-plan-file-actions { min-width:136px; flex-direction:column; flex-wrap:nowrap; justify-content:center; padding:8px; }
    .lesson-plan-export-btn { width:126px; min-height:32px; padding:0 7px; font-size:11px; }
  }
</style>
<script id="mvip-server-lesson-plans-script-20260822">
(() => {
  'use strict';

  const regularTestStartBtn = document.getElementById('regularTestStartBtn');
  const wordFileInput = document.getElementById('wordPresentationFileInput');
  if (!(regularTestStartBtn instanceof HTMLElement) || !(wordFileInput instanceof HTMLInputElement)
      || document.getElementById('lessonPlanStartBtn')) return;

  const LESSON_API_ROOT = (typeof API_BASE === 'string' && API_BASE) ? API_BASE : 'https://api.mvip.vn';
  const LIST_ENDPOINT = `${LESSON_API_ROOT}/api/bai-giang/files`;
  const FILE_ENDPOINT = `${LESSON_API_ROOT}/api/bai-giang/tai-file`;
  const ROOT_URL = '/downloads/Bai_giang/';

  const button = document.createElement('button');
  button.type = 'button';
  button.id = 'lessonPlanStartBtn';
  button.className = 'lesson-plan-start-btn';
  button.disabled = true;
  button.hidden = true;
  button.innerHTML = '<span aria-hidden="true">📚</span><span>Bài giảng</span>';
  regularTestStartBtn.insertAdjacentElement('afterend', button);

  const modal = document.createElement('div');
  modal.id = 'lessonPlanModal';
  modal.className = 'lesson-plan-modal';
  modal.hidden = true;
  modal.setAttribute('role', 'dialog');
  modal.setAttribute('aria-modal', 'true');
  modal.setAttribute('aria-labelledby', 'lessonPlanTitle');
  modal.innerHTML = `
    <div class="lesson-plan-modal-backdrop" data-lesson-plan-close="1"></div>
    <section class="lesson-plan-dialog">
      <header class="lesson-plan-head">
        <div>
          <h3 id="lessonPlanTitle">Bài giảng</h3>
          <div class="lesson-plan-current-class" id="lessonPlanCurrentClass"></div>
        </div>
        <div class="lesson-plan-head-actions">
          <button class="lesson-plan-refresh-btn" id="lessonPlanRefreshBtn" type="button">Tải lại</button>
          <button class="lesson-plan-close-btn" id="lessonPlanCloseBtn" type="button">Đóng</button>
        </div>
      </header>
      <div class="lesson-plan-body" id="lessonPlanBody">
        <div class="lesson-plan-status" id="lessonPlanStatus">Chọn Lớp-Môn rồi bấm Bài giảng.</div>
        <div class="lesson-plan-list" id="lessonPlanList"></div>
      </div>
    </section>`;
  document.body.appendChild(modal);

  const currentClassEl = modal.querySelector('#lessonPlanCurrentClass');
  const statusEl = modal.querySelector('#lessonPlanStatus');
  const listEl = modal.querySelector('#lessonPlanList');
  const bodyEl = modal.querySelector('#lessonPlanBody');
  const refreshBtn = modal.querySelector('#lessonPlanRefreshBtn');
  const closeBtn = modal.querySelector('#lessonPlanCloseBtn');
  const wordPresenter = document.getElementById('wordPresentationPresenter');
  const wordPresenterCloseBtn = document.getElementById('wordPresentationCloseBtn');

  let lastFocus = null;
  let activeFolder = '';
  let loading = false;
  let lessonInternalLoad = false;
  let lessonAccessRefreshPending = false;
  let lastLessonAccessRefreshAt = 0;

  const printOptionsDialog = document.createElement('dialog');
  printOptionsDialog.className = 'lesson-print-options-dialog';
  printOptionsDialog.id = 'lessonPrintOptionsDialog';
  printOptionsDialog.setAttribute('aria-labelledby', 'lessonPrintOptionsTitle');
  printOptionsDialog.innerHTML = `
    <form class="lesson-print-options-form">
      <h3 id="lessonPrintOptionsTitle">Xuất để in</h3>
      <p class="lesson-print-options-file" id="lessonPrintOptionsFile"></p>
      <p>Chọn nội dung cần đưa vào bản in.</p>
      <label><input id="lessonPrintIncludeImages" type="checkbox" checked> <span>Xuất cả hình</span></label>
      <label><input id="lessonPrintIncludeHomework" type="checkbox" checked> <span>Xuất các bài tập về nhà</span></label>
      <div class="lesson-print-options-actions">
        <button id="lessonPrintOptionsCancel" type="button" class="nav-btn btn-outline">Hủy</button>
        <button type="submit" class="nav-btn btn-primary">Xuất Word</button>
      </div>
    </form>`;
  document.body.appendChild(printOptionsDialog);
  let printOptionsContext = null;

  function closePrintOptions() {
    if (printOptionsDialog.open) printOptionsDialog.close();
    const trigger = printOptionsContext && printOptionsContext.trigger;
    printOptionsContext = null;
    if (trigger instanceof HTMLElement && trigger.isConnected) trigger.focus({ preventScroll:true });
  }

  function openPrintOptions(file, trigger) {
    if (loading || printOptionsDialog.open) return;
    printOptionsContext = { file, trigger };
    printOptionsDialog.querySelector('#lessonPrintOptionsFile').textContent = file.name;
    printOptionsDialog.querySelector('#lessonPrintIncludeImages').checked = true;
    printOptionsDialog.querySelector('#lessonPrintIncludeHomework').checked = true;
    printOptionsDialog.showModal();
    printOptionsDialog.querySelector('#lessonPrintIncludeImages').focus();
  }

  printOptionsDialog.querySelector('#lessonPrintOptionsCancel').addEventListener('click', closePrintOptions);
  printOptionsDialog.addEventListener('cancel', (event) => { event.preventDefault(); closePrintOptions(); });
  printOptionsDialog.addEventListener('keydown', (event) => {
    if (event.key === 'Escape') event.stopPropagation();
  });
  printOptionsDialog.addEventListener('click', (event) => {
    if (event.target === printOptionsDialog) closePrintOptions();
  });
  printOptionsDialog.querySelector('form').addEventListener('submit', (event) => {
    event.preventDefault();
    if (!printOptionsContext) return;
    const { file, trigger } = printOptionsContext;
    const options = {
      includeImages: printOptionsDialog.querySelector('#lessonPrintIncludeImages').checked,
      includeHomework: printOptionsDialog.querySelector('#lessonPrintIncludeHomework').checked,
    };
    closePrintOptions();
    exportPrintLesson(file, trigger, options);
  });

  function normalizeMon(value) {
    const raw = String(value || '').trim();
    if (!raw) return '';
    try { return typeof normMonKey === 'function' ? normMonKey(raw) : raw; }
    catch (_) { return raw; }
  }

  function currentMon() {
    try {
      if (typeof state !== 'undefined' && state && state.currentMon) return normalizeMon(state.currentMon);
    } catch (_) {}
    const primary = document.getElementById('classSubjectSelect');
    const compact = document.getElementById('compactClassSubjectSelect');
    return normalizeMon((primary && primary.value) || (compact && compact.value) || '');
  }

  function currentLoggedIn() {
    try { return !!(typeof state !== 'undefined' && state && String(state.token || '').trim()); }
    catch (_) { return false; }
  }

  function currentLessonAccess() {
    try {
      const value = typeof state !== 'undefined' && state && state.sessionInfo
        ? state.sessionInfo.lesson_access
        : false;
      return value === true || value === 1 || value === '1';
    } catch (_) { return false; }
  }

  function selectedLessonFolder(mon) {
    const key = normalizeMon(mon);
    if (!key) return '';
    try {
      if (typeof findRegularTestBankOptionForMon === 'function') {
        const found = findRegularTestBankOptionForMon(key);
        const folder = String(found && found.option && found.option.dataset && found.option.dataset.bankFolder || '').trim();
        if (folder) return folder.replace(/\\/g, '/').replace(/^\/+|\/+$/g, '');
      }
    } catch (_) {}

    try {
      const parsed = typeof parseClassSubjectNameForDialog === 'function'
        ? parseClassSubjectNameForDialog(key)
        : null;
      const bankSelect = document.getElementById('cv7991QuestionBankSelect');
      const options = Array.from(bankSelect && bankSelect.options || []);
      const match = options.find((option) => {
        try {
          return typeof regularTestBankOptionMatchesParsed === 'function'
            ? regularTestBankOptionMatchesParsed(option, parsed)
            : false;
        } catch (_) { return false; }
      });
      const folder = String(match && match.dataset && match.dataset.bankFolder || '').trim();
      if (folder) return folder.replace(/\\/g, '/').replace(/^\/+|\/+$/g, '');
    } catch (_) {}
    return '';
  }

  function updateButtonState() {
    const mon = currentMon();
    const folder = selectedLessonFolder(mon);
    const loggedIn = currentLoggedIn();
    const hasAccess = loggedIn && currentLessonAccess();
    button.dataset.serverLessonAccess = hasAccess ? 'true' : 'false';
    /* Bài giảng là chức năng cấp riêng theo tài khoản: chưa đăng nhập hoặc
       phiên không có lesson_access thì không hiện nút ở bất kỳ màn hình nào. */
    button.hidden = !hasAccess;
    /* Khi đã có quyền, vẫn cho bấm Bài giảng dù chưa chọn lớp-môn để hiện
       thông báo chỉ vị trí combo ở thanh phía trên, bên phải. */
    button.disabled = !hasAccess || loading;
    if (!hasAccess && !modal.hidden) closeModal(false);
    if (!hasAccess && wordPresenter instanceof HTMLElement
        && wordPresenter.dataset.lessonPlanPresentation === '1'
        && !wordPresenter.hidden
        && wordPresenterCloseBtn instanceof HTMLElement) {
      wordPresenterCloseBtn.click();
    }
    if (!hasAccess) button.title = 'Tài khoản chưa được quản trị viên cấp quyền sử dụng Bài giảng.';
    else if (!mon) button.title = 'Chọn Lớp-Môn trước.';
    else if (!folder) button.title = `Chưa xác định được thư mục Bài giảng cho ${mon}.`;
    else if (loading) button.title = 'Đang tải danh sách bài giảng...';
    else button.title = `Mở danh sách bài giảng của ${mon}.`;
  }

  function setStatus(message, type = '') {
    if (!(statusEl instanceof HTMLElement)) return;
    statusEl.textContent = String(message || '');
    statusEl.className = `lesson-plan-status${type ? ' ' + type : ''}`;
  }

  function notify(message, title = 'Thông báo') {
    try {
      if (typeof openAlertModal === 'function') {
        openAlertModal(String(message || ''), title);
        return;
      }
    } catch (_) {}
    alert(String(message || ''));
  }

  function naturalCompare(a, b) {
    return String(a && a.name || '').localeCompare(String(b && b.name || ''), 'vi', {
      numeric:true,
      sensitivity:'base'
    });
  }

  function folderUrl(folder) {
    const clean = String(folder || '').replace(/\\/g, '/').replace(/^\/+|\/+$/g, '');
    const encoded = clean.split('/').filter(Boolean).map(encodeURIComponent).join('/');
    return new URL(`${ROOT_URL}${encoded ? encoded + '/' : ''}`, window.location.href).href;
  }

  function normalizeFileEntries(rawFiles, folder) {
    const base = folderUrl(folder);
    const output = [];
    const seen = new Set();
    (Array.isArray(rawFiles) ? rawFiles : []).forEach((raw) => {
      const item = raw && typeof raw === 'object' ? raw : { name:raw };
      let name = String(item.name || item.file || '').trim();
      let url = String(item.url || item.href || '').trim();
      const path = String(item.path || item.relative_path || '')
        .replace(/\\/g, '/')
        .replace(/^\/+/, '')
        .trim();
      if (!name && url) {
        try { name = decodeURIComponent(new URL(url, base).pathname.split('/').pop() || ''); } catch (_) {}
      }
      if (!name || /^~\$/i.test(name) || !/\.(?:docx|docm)$/i.test(name)) return;
      const pathParts = path.split('/');
      if (!path || pathParts.some((part) => !part || part === '.' || part === '..')) return;
      try {
        url = url ? new URL(url, base).href : new URL(encodeURIComponent(name), base).href;
      } catch (_) { return; }
      let parsed = null;
      try { parsed = new URL(url, window.location.href); } catch (_) { return; }
      const baseParsed = new URL(base);
      if (parsed.origin !== baseParsed.origin || !parsed.pathname.startsWith(baseParsed.pathname)) return;
      const relative = parsed.pathname.slice(baseParsed.pathname.length);
      if (!relative || relative.includes('/')) return;
      const key = parsed.href.replace(/#.*$/, '');
      if (seen.has(key)) return;
      seen.add(key);
      output.push({
        name,
        path,
        url:key,
        title:String(item.title || item.display_name || '').trim(),
        size:Math.max(0, Number(item.size || 0) || 0),
        mtime:item.mtime || item.modified || ''
      });
    });
    return output.sort(naturalCompare);
  }

  async function readJsonResponse(response, label) {
    const text = await response.text();
    let data = null;
    try { data = JSON.parse(text); }
    catch (_) {
      const preview = text.replace(/\s+/g, ' ').trim().slice(0, 120);
      throw new Error(`${label} không trả về JSON${preview ? `: ${preview}` : ''}`);
    }
    if (data && data.ok === false) throw new Error(String(data.error || data.detail || `${label} báo lỗi`));
    return data;
  }

  async function discoverLessonFiles(folder) {
    const endpoint = new URL(LIST_ENDPOINT, window.location.href);
    endpoint.searchParams.set('folder', folder);
    endpoint.searchParams.set('_mvip', String(Date.now()));
    const lessonToken = (() => {
      try { return String((typeof state !== 'undefined' && state && state.token) || '').trim(); }
      catch (_) { return ''; }
    })();
    if (!lessonToken) throw new Error('Bạn cần đăng nhập trước khi mở Bài giảng.');

    const response = await fetch(endpoint.href, {
      cache:'no-store',
      headers:{
        'Accept':'application/json',
        'Authorization':`Bearer ${lessonToken}`
      }
    });
    const text = await response.text();
    let data = null;
    try { data = text ? JSON.parse(text) : {}; }
    catch (_) { data = {}; }
    if (!response.ok) {
      if (response.status === 403 && typeof state !== 'undefined' && state && state.sessionInfo) {
        state.sessionInfo.lesson_access = false;
        updateButtonState();
      }
      throw new Error(String((data && (data.detail || data.error)) || `Không đọc được Bài giảng (HTTP ${response.status}).`));
    }
    const files = normalizeFileEntries(data && data.files, folder);
    return {
      files,
      method:'api-bai-giang',
      errors:files.length ? [] : ['Thư mục chưa có file Word']
    };
  }

  function humanTitle(file) {
    if (file && file.title) return file.title;
    let stem = String(file && file.name || '')
      .replace(/\.(?:docx|docm)$/i, '')
      .replace(/^KHBD(?:[_\-\s]+)?/i, '')
      .replace(/[_\-]+/g, ' ')
      .replace(/\s+/g, ' ')
      .trim();
    stem = stem
      .replace(/\bBai\s*(\d+)\b/ig, 'Bài $1')
      .replace(/\bToan\b/ig, 'Toán')
      .replace(/\bNgu\s*van\b/ig, 'Ngữ văn')
      .replace(/\bDon\s*thuc\b/ig, 'Đơn thức')
      .replace(/\bDa\s*thuc\b/ig, 'Đa thức');
    return stem || String(file && file.name || 'Kế hoạch bài dạy');
  }


  function setLessonPresentationMode(active) {
    const enabled = !!active;
    if (wordPresenter instanceof HTMLElement) {
      wordPresenter.classList.toggle('is-lesson-plan-presentation', enabled);
      if (enabled) wordPresenter.dataset.lessonPlanPresentation = '1';
      else delete wordPresenter.dataset.lessonPlanPresentation;
    }
  }

  function validatedLessonPath(file) {
    const path = String(file && file.path || '').replace(/\\/g, '/').replace(/^\/+/, '').trim();
    const parts = path.split('/');
    if (!path || parts.some((part) => !part || part === '.' || part === '..') || !/\.(?:docx|docm)$/i.test(path)) {
      throw new Error('Đường dẫn bài giảng không hợp lệ.');
    }
    return path;
  }

  async function fetchLessonBlob(file) {
    const path = validatedLessonPath(file);
    const lessonToken = (() => {
      try { return String((typeof state !== 'undefined' && state && state.token) || '').trim(); }
      catch (_) { return ''; }
    })();
    if (!lessonToken) throw new Error('Bạn cần đăng nhập trước khi mở Bài giảng.');
    const endpoint = new URL(FILE_ENDPOINT, window.location.href);
    endpoint.searchParams.set('path', path);
    const response = await fetch(endpoint.href, {
      cache:'no-store',
      headers:{
        'Accept':'application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/vnd.ms-word.document.macroEnabled.12',
        'Authorization':`Bearer ${lessonToken}`
      }
    });
    if (!response.ok) {
      let detail = '';
      try {
        const data = await response.clone().json();
        detail = String(data && (data.detail || data.error) || '');
      } catch (_) {}
      if (response.status === 403 && typeof state !== 'undefined' && state && state.sessionInfo) {
        state.sessionInfo.lesson_access = false;
        updateButtonState();
      }
      throw new Error(detail || `Không tải được file Word (HTTP ${response.status}).`);
    }
    const blob = await response.blob();
    if (!blob.size) throw new Error('File Word tải về đang rỗng.');
    return blob;
  }

  function downloadBlob(blob, fileName) {
    const url = URL.createObjectURL(blob);
    const anchor = document.createElement('a');
    anchor.href = url;
    anchor.download = String(fileName || 'Bai_giang.docx');
    anchor.style.display = 'none';
    document.body.appendChild(anchor);
    anchor.click();
    window.setTimeout(() => {
      URL.revokeObjectURL(url);
      anchor.remove();
    }, 1800);
  }

  const WORDPROCESSINGML_NS = 'http://schemas.openxmlformats.org/wordprocessingml/2006/main';

  function normalizedWordBlockText(element) {
    if (!(element instanceof Element)) return '';
    const textNodes = Array.from(element.getElementsByTagNameNS(WORDPROCESSINGML_NS, 't'));
    return textNodes.map((node) => String(node.textContent || '')).join('')
      .replace(/\u00a0/g, ' ')
      .replace(/\s+/g, ' ')
      .trim();
  }

  function printMarkerInfo(textValue) {
    const text = String(textValue || '')
      .replace(/\u00a0/g, ' ')
      .replace(/[\u200B-\u200D\uFEFF]/g, '')
      .replace(/\s+/g, ' ')
      .trim();
    if (!text) return { type:'', number:0, implicit:false };
    if (/^NDTC\s*[:：]?$/iu.test(text)) return { type:'ndtc', number:0, implicit:true };
    if (/^(?:Giải|Giai)\s+NDTC\s*[:：]?$/iu.test(text)) return { type:'solution', number:0, implicit:true };
    let match = text.match(/^NDTC\s*(\d+)\s*:?\s*$/iu);
    if (match) return { type:'ndtc', number:Math.max(0, Number(match[1]) || 0), implicit:false };
    match = text.match(/^Giải\s+NDTC\s*(\d+)\s*:?\s*$/iu);
    if (match) return { type:'solution', number:Math.max(0, Number(match[1]) || 0), implicit:false };
    const withoutStars = text.replace(/\*/g, '').replace(/\s+/g, ' ').trim().toLocaleLowerCase('vi-VN');
    if (withoutStars === 'hết ndtc') return { type:'end', number:0, implicit:false };
    return { type:'', number:0, implicit:false };
  }

  function wordChild(parent, localName) {
    if (!(parent instanceof Element)) return null;
    return Array.from(parent.children || []).find((child) =>
      child instanceof Element
      && child.namespaceURI === WORDPROCESSINGML_NS
      && String(child.localName || '').toLowerCase() === String(localName || '').toLowerCase()
    ) || null;
  }

  function createWordElement(xmlDoc, localName) {
    return xmlDoc.createElementNS(WORDPROCESSINGML_NS, `w:${localName}`);
  }

  function setWordAttribute(element, localName, value) {
    if (!(element instanceof Element)) return;
    element.setAttributeNS(WORDPROCESSINGML_NS, `w:${localName}`, String(value));
  }

  function ensureWordChild(xmlDoc, parent, localName, beforeNode = null) {
    let child = wordChild(parent, localName);
    if (child) return child;
    child = createWordElement(xmlDoc, localName);
    if (beforeNode && beforeNode.parentNode === parent) parent.insertBefore(child, beforeNode);
    else parent.appendChild(child);
    return child;
  }

  function replaceMarkerParagraphWithSolutionLabel(xmlDoc, paragraph) {
    if (!(paragraph instanceof Element)) return false;
    const textNodes = Array.from(paragraph.getElementsByTagNameNS(WORDPROCESSINGML_NS, 't'));
    if (textNodes.length) {
      textNodes[0].textContent = 'Giải';
      textNodes[0].setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:space', 'preserve');
      textNodes.slice(1).forEach((node) => { node.textContent = ''; });
      return true;
    }
    const run = createWordElement(xmlDoc, 'r');
    const textNode = createWordElement(xmlDoc, 't');
    textNode.setAttributeNS('http://www.w3.org/XML/1998/namespace', 'xml:space', 'preserve');
    textNode.textContent = 'Giải';
    run.appendChild(textNode);
    paragraph.appendChild(run);
    return true;
  }

  function paragraphHasPrintableContent(paragraph) {
    if (!(paragraph instanceof Element)) return false;
    if (normalizedWordBlockText(paragraph)) return true;
    return ['drawing', 'object', 'pict', 'oMath', 'oMathPara'].some((localName) =>
      paragraph.getElementsByTagNameNS('*', localName).length > 0
    );
  }

  function centerWordParagraph(xmlDoc, paragraph) {
    if (!(paragraph instanceof Element)) return false;
    let pPr = wordChild(paragraph, 'pPr');
    if (!pPr) {
      pPr = createWordElement(xmlDoc, 'pPr');
      paragraph.insertBefore(pPr, paragraph.firstChild || null);
    }
    let jc = wordChild(pPr, 'jc');
    if (!jc) {
      jc = createWordElement(xmlDoc, 'jc');
      pPr.appendChild(jc);
    }
    setWordAttribute(jc, 'val', 'center');
    return true;
  }

  function removeWordBackgroundFormatting(xmlDoc) {
    if (!xmlDoc) return 0;
    let removed = 0;
    ['shd', 'highlight', 'background'].forEach((localName) => {
      Array.from(xmlDoc.getElementsByTagNameNS(WORDPROCESSINGML_NS, localName)).forEach((node) => {
        if (node && node.parentNode) {
          node.remove();
          removed += 1;
        }
      });
    });
    return removed;
  }

  function setTimesNewRomanOnFontsElement(element) {
    if (!(element instanceof Element)) return;
    ['asciiTheme', 'hAnsiTheme', 'eastAsiaTheme', 'cstheme'].forEach((name) => {
      element.removeAttributeNS(WORDPROCESSINGML_NS, name);
      element.removeAttribute(`w:${name}`);
      element.removeAttribute(name);
    });
    ['ascii', 'hAnsi', 'eastAsia', 'cs'].forEach((name) => setWordAttribute(element, name, 'Times New Roman'));
  }

  function runContainsVisibleWordText(run) {
    if (!(run instanceof Element)) return false;
    return ['t', 'delText', 'instrText'].some((localName) =>
      run.getElementsByTagNameNS(WORDPROCESSINGML_NS, localName).length > 0
    );
  }

  function runContainsNonTextObject(run) {
    if (!(run instanceof Element)) return false;
    const wordObjects = ['sym', 'drawing', 'object', 'pict'];
    if (wordObjects.some((localName) => run.getElementsByTagNameNS(WORDPROCESSINGML_NS, localName).length > 0)) return true;
    return ['oMath', 'oMathPara'].some((localName) => run.getElementsByTagNameNS('*', localName).length > 0);
  }

  function applyTimesNewRomanToTextRuns(xmlDoc) {
    if (!xmlDoc) return 0;
    let changed = 0;
    Array.from(xmlDoc.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'r')).forEach((run) => {
      if (!(run instanceof Element) || !runContainsVisibleWordText(run) || runContainsNonTextObject(run)) return;
      let rPr = wordChild(run, 'rPr');
      if (!rPr) {
        rPr = createWordElement(xmlDoc, 'rPr');
        run.insertBefore(rPr, run.firstChild || null);
      }
      let rFonts = wordChild(rPr, 'rFonts');
      if (!rFonts) {
        rFonts = createWordElement(xmlDoc, 'rFonts');
        rPr.insertBefore(rFonts, rPr.firstChild || null);
      }
      setTimesNewRomanOnFontsElement(rFonts);
      changed += 1;
    });
    return changed;
  }

  function ensureReadableTextAfterBackgroundRemoval(xmlDoc) {
    if (!xmlDoc) return 0;
    let changed = 0;
    Array.from(xmlDoc.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'r')).forEach((run) => {
      if (!(run instanceof Element) || !runContainsVisibleWordText(run) || runContainsNonTextObject(run)) return;
      const rPr = wordChild(run, 'rPr');
      if (!rPr) return;
      const color = wordChild(rPr, 'color');
      if (!color) return;
      const value = String(
        color.getAttributeNS(WORDPROCESSINGML_NS, 'val')
        || color.getAttribute('w:val')
        || color.getAttribute('val')
        || ''
      ).replace(/^#/, '').trim().toUpperCase();
      const themeColor = String(
        color.getAttributeNS(WORDPROCESSINGML_NS, 'themeColor')
        || color.getAttribute('w:themeColor')
        || color.getAttribute('themeColor')
        || ''
      ).trim().toLowerCase();
      if (!['FFFFFF', 'FFF', 'WHITE'].includes(value) && !['background1', 'lt1'].includes(themeColor)) return;
      setWordAttribute(color, 'val', '000000');
      ['themeColor', 'themeTint', 'themeShade'].forEach((name) => {
        color.removeAttributeNS(WORDPROCESSINGML_NS, name);
        color.removeAttribute(`w:${name}`);
        color.removeAttribute(name);
      });
      changed += 1;
    });
    return changed;
  }

  function ensureTimesNewRomanDocumentDefault(xmlDoc) {
    if (!xmlDoc || !(xmlDoc.documentElement instanceof Element)) return;
    const styles = xmlDoc.documentElement;
    const docDefaults = ensureWordChild(xmlDoc, styles, 'docDefaults', styles.firstChild || null);
    const rPrDefault = ensureWordChild(xmlDoc, docDefaults, 'rPrDefault');
    const rPr = ensureWordChild(xmlDoc, rPrDefault, 'rPr');
    const rFonts = ensureWordChild(xmlDoc, rPr, 'rFonts', rPr.firstChild || null);
    setTimesNewRomanOnFontsElement(rFonts);
  }

  function serializeWordXml(xmlDoc, originalText) {
    let serialized = new XMLSerializer().serializeToString(xmlDoc);
    if (/^\s*<\?xml/i.test(String(originalText || '')) && !/^\s*<\?xml/i.test(serialized)) {
      serialized = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' + serialized;
    }
    return serialized;
  }

  function printPlainText(value) {
    return String(value || '').normalize('NFD').replace(/[\u0300-\u036f]/g, '')
      .replace(/đ/g, 'd').replace(/Đ/g, 'D').toLowerCase().replace(/\s+/g, ' ').trim();
  }

  function isPrintHomeworkTitle(value) {
    const text = printPlainText(value).replace(/^(?:[ivxlcdm]+|\d+)[.)]\s*/, '');
    return /^(?:(?:bai tap|nhiem vu)(?: lam)? (?:ve|o) nha|huong dan(?: hoc| tu hoc)? (?:ve|o) nha|btvn)\b/.test(text);
  }

  function wordAncestor(element, localName) {
    let current = element;
    while (current instanceof Element) {
      if (current.namespaceURI === WORDPROCESSINGML_NS && current.localName === localName) return current;
      current = current.parentElement;
    }
    return null;
  }

  function removePrintParagraphs(xmlDoc, paragraphs) {
    const tables = new Set();
    const cells = new Set();
    let removed = 0;
    paragraphs.forEach((paragraph) => {
      if (!xmlDoc.documentElement.contains(paragraph)) return;
      const table = wordAncestor(paragraph, 'tbl');
      const cell = wordAncestor(paragraph, 'tc');
      if (table) tables.add(table);
      if (cell) cells.add(cell);
      // Giữ ngắt phần và thiết lập trang khi đoạn bị loại có sectPr.
      const pPr = wordChild(paragraph, 'pPr');
      if (pPr && wordChild(pPr, 'sectPr')) {
        Array.from(paragraph.childNodes).forEach((node) => { if (node !== pPr) node.remove(); });
      } else paragraph.remove();
      removed += 1;
    });
    tables.forEach((table) => {
      if (!Array.from(table.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'p')).some(paragraphHasPrintableContent)) table.remove();
    });
    cells.forEach((cell) => {
      if (xmlDoc.documentElement.contains(cell) && !wordChild(cell, 'p')) cell.appendChild(createWordElement(xmlDoc, 'p'));
    });
    return removed;
  }

  function homeworkExerciseReferences(textValue) {
    const text = printPlainText(textValue);
    const references = new Set();
    const numberPattern = '(\\d+(?:\\.\\d+)*)';
    const ranges = new RegExp('bai(?:\\s+tap)?\\s+' + numberPattern + '\\s*(?:den|toi|[-–—])\\s*(?:bai(?:\\s+tap)?\\s*)?' + numberPattern, 'g');
    for (const match of text.matchAll(ranges)) {
      const start = match[1].split('.');
      const end = match[2].split('.');
      const first = Number(start.pop()), last = Number(end.pop());
      if (start.join('.') !== end.join('.') || last < first || last - first > 1000) continue;
      for (let n = first; n <= last; n += 1) references.add([...start, String(n)].join('.'));
    }
    for (const match of text.matchAll(/\bbai(?:\s+tap)?\s+(\d+(?:\.\d+)*)\b/g)) references.add(match[1]);
    for (const match of text.matchAll(/\b\d+\.\d+(?:\.\d+)*\b/g)) references.add(match[0]);
    return references;
  }

  function removePrintHomework(xmlDoc, body) {
    const paragraphs = Array.from(body.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'p'))
      .filter((paragraph) => !wordAncestor(paragraph.parentElement, 'p'));
    const groups = [];
    const grouped = new Set();
    let current = null;
    paragraphs.forEach((paragraph) => {
      const marker = printMarkerInfo(normalizedWordBlockText(paragraph));
      if (marker.type === 'ndtc') {
        current = { paragraphs:[], title:'', homework:false };
        groups.push(current);
      }
      if (current) {
        current.paragraphs.push(paragraph);
        grouped.add(paragraph);
        const text = normalizedWordBlockText(paragraph);
        if (!marker.type && text && !current.title) current.title = text;
      }
      if (marker.type === 'end') current = null;
    });
    const references = new Set();
    groups.forEach((group) => {
      group.homework = isPrintHomeworkTitle(group.title);
      if (group.homework) {
        homeworkExerciseReferences(group.paragraphs.map(normalizedWordBlockText).join(' '))
          .forEach((reference) => references.add(reference));
      }
    });
    const toRemove = new Set();
    let homeworkSequence = false;
    groups.forEach((group) => {
      const title = printPlainText(group.title);
      const exercise = title.match(/^bai(?:\s+tap)?\s+(\d+(?:\.\d+)*)\b/);
      if (group.homework) homeworkSequence = true;
      else if (!exercise && !/^bai tap(?:\s*\(|$)/.test(title)) homeworkSequence = false;
      const omit = group.homework || (exercise && (references.has(exercise[1]) || (homeworkSequence && !references.size)));
      if (omit) group.paragraphs.forEach((paragraph) => toRemove.add(paragraph));
    });
    // Hỗ trợ cả phần giao bài về nhà viết ngoài các khối NDTC.
    let plainHomework = false;
    paragraphs.forEach((paragraph) => {
      if (grouped.has(paragraph)) { plainHomework = false; return; }
      const text = normalizedWordBlockText(paragraph);
      if (isPrintHomeworkTitle(text)) plainHomework = true;
      else if (plainHomework && text) {
        const pPr = wordChild(paragraph, 'pPr');
        const style = pPr && wordChild(pPr, 'pStyle');
        const styleName = style && (style.getAttributeNS(WORDPROCESSINGML_NS, 'val') || style.getAttribute('w:val')) || '';
        if (/^heading[1-3]$/i.test(styleName) || /^(?:[IVXLCDM]+[.)]|HOẠT ĐỘNG\s+\d+)/u.test(text)) plainHomework = false;
      }
      if (plainHomework) toRemove.add(paragraph);
    });
    return removePrintParagraphs(xmlDoc, toRemove);
  }

  function removePrintImages(xmlDoc) {
    const affectedParagraphs = new Set();
    const alternatives = new Set();
    let removed = 0;
    ['drawing', 'pict'].forEach((name) => {
      Array.from(xmlDoc.getElementsByTagNameNS(WORDPROCESSINGML_NS, name)).forEach((node) => {
        if (!xmlDoc.documentElement.contains(node)) return;
        // Ảnh xem trước trong đối tượng Equation/MathType thuộc công thức, phải giữ.
        if (wordAncestor(node, 'object') || node.getElementsByTagNameNS('*', 'oMath').length) return;
        const properties = Array.from(node.getElementsByTagNameNS('*', 'docPr'));
        if (properties.some((prop) => /(?:mathtype|equation)/i.test(`${prop.getAttribute('name') || ''} ${prop.getAttribute('descr') || ''}`))) return;
        const paragraph = wordAncestor(node, 'p');
        if (paragraph) affectedParagraphs.add(paragraph);
        let ancestor = node.parentElement;
        while (ancestor instanceof Element) {
          if (ancestor.namespaceURI === 'http://schemas.openxmlformats.org/markup-compatibility/2006' && ancestor.localName === 'AlternateContent') alternatives.add(ancestor);
          ancestor = ancestor.parentElement;
        }
        node.remove();
        removed += 1;
      });
    });
    alternatives.forEach((node) => {
      if (!normalizedWordBlockText(node) && !['drawing', 'pict', 'object', 'oMath', 'oMathPara'].some((name) => node.getElementsByTagNameNS('*', name).length)) node.remove();
    });
    const emptyParagraphs = new Set(Array.from(affectedParagraphs).filter((paragraph) =>
      !paragraphHasPrintableContent(paragraph) && !paragraph.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'br').length
    ));
    removePrintParagraphs(xmlDoc, emptyParagraphs);
    return removed;
  }

  async function patchAdditionalWordXmlParts(zip, options = {}) {
    const candidates = Object.keys(zip.files || {}).filter((name) => {
      if (name === 'word/document.xml') return false;
      if (name === 'word/styles.xml') return true;
      return /^word\/(?:header\d+|footer\d+|footnotes|endnotes|comments)\.xml$/i.test(name);
    });
    let removedBackgrounds = 0;
    let fontRuns = 0;
    let removedImages = 0;
    for (const name of candidates) {
      const entry = zip.file(name);
      if (!entry) continue;
      const source = await entry.async('string');
      const xmlDoc = new DOMParser().parseFromString(source, 'application/xml');
      if (xmlDoc.querySelector('parsererror')) continue;
      if (options.includeImages === false) removedImages += removePrintImages(xmlDoc);
      removedBackgrounds += removeWordBackgroundFormatting(xmlDoc);
      fontRuns += applyTimesNewRomanToTextRuns(xmlDoc);
      ensureReadableTextAfterBackgroundRemoval(xmlDoc);
      if (name === 'word/styles.xml') ensureTimesNewRomanDocumentDefault(xmlDoc);
      zip.file(name, serializeWordXml(xmlDoc, source));
    }
    return { removedBackgrounds, fontRuns, removedImages };
  }

  async function makePrintLessonBlob(sourceBlob, options = {}) {
    if (!window.JSZip) throw new Error('Chưa tải được thư viện xử lý Word để xuất bản in.');
    const zip = await window.JSZip.loadAsync(await sourceBlob.arrayBuffer());
    const documentEntry = zip.file('word/document.xml');
    if (!documentEntry) throw new Error('File Word không có word/document.xml.');
    const xmlText = await documentEntry.async('string');
    const xmlDoc = new DOMParser().parseFromString(xmlText, 'application/xml');
    if (xmlDoc.querySelector('parsererror')) throw new Error('Không đọc được cấu trúc XML của file Word.');
    const body = Array.from(xmlDoc.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'body'))[0];
    if (!(body instanceof Element)) throw new Error('Không tìm thấy phần nội dung chính của file Word.');
    const removedHomeworkParagraphs = options.includeHomework === false ? removePrintHomework(xmlDoc, body) : 0;

    // Bản in chỉ bỏ các dòng NDTC/NDTCn và ***Hết NDTC***. Với dòng
    // "Giải NDTC" hoặc "Giải NDTCn", chỉ giữ lại đúng chữ "Giải".
    // Các nội dung còn lại được giữ; hình và bài tập về nhà theo lựa chọn xuất.
    const handledByType = { ndtc:0, solution:0, end:0 };
    let removedMarkerParagraphs = 0;
    let solutionLabelsKept = 0;
    let centerNextNdTc1Content = false;
    let centeredNdTc1Title = false;
    let ndtcMarkerOrder = 0;
    const paragraphs = Array.from(body.getElementsByTagNameNS(WORDPROCESSINGML_NS, 'p'));

    paragraphs.forEach((paragraph) => {
      if (!(paragraph instanceof Element) || !paragraph.parentNode) return;
      const info = printMarkerInfo(normalizedWordBlockText(paragraph));

      if (info.type === 'ndtc') {
        ndtcMarkerOrder += 1;
        const effectiveNumber = info.number > 0 ? info.number : ndtcMarkerOrder;
        centerNextNdTc1Content = effectiveNumber === 1;
        const parent = paragraph.parentNode;
        paragraph.remove();
        handledByType.ndtc += 1;
        removedMarkerParagraphs += 1;

        // Word yêu cầu mỗi ô bảng phải còn ít nhất một đoạn văn.
        if (parent instanceof Element && String(parent.localName || '').toLowerCase() === 'tc') {
          const remainingParagraphs = Array.from(parent.children || []).filter((child) =>
            child instanceof Element
            && child.namespaceURI === WORDPROCESSINGML_NS
            && String(child.localName || '').toLowerCase() === 'p'
          );
          if (!remainingParagraphs.length) parent.appendChild(createWordElement(xmlDoc, 'p'));
        }
        return;
      }

      if (info.type === 'solution') {
        centerNextNdTc1Content = false;
        if (replaceMarkerParagraphWithSolutionLabel(xmlDoc, paragraph)) {
          handledByType.solution += 1;
          solutionLabelsKept += 1;
        }
        return;
      }

      if (info.type === 'end') {
        centerNextNdTc1Content = false;
        const parent = paragraph.parentNode;
        paragraph.remove();
        handledByType.end += 1;
        removedMarkerParagraphs += 1;
        if (parent instanceof Element && String(parent.localName || '').toLowerCase() === 'tc') {
          const remainingParagraphs = Array.from(parent.children || []).filter((child) =>
            child instanceof Element
            && child.namespaceURI === WORDPROCESSINGML_NS
            && String(child.localName || '').toLowerCase() === 'p'
          );
          if (!remainingParagraphs.length) parent.appendChild(createWordElement(xmlDoc, 'p'));
        }
        return;
      }

      if (centerNextNdTc1Content && paragraphHasPrintableContent(paragraph)) {
        centeredNdTc1Title = centerWordParagraph(xmlDoc, paragraph) || centeredNdTc1Title;
        centerNextNdTc1Content = false;
      }
    });

    const handledMarkers = removedMarkerParagraphs + solutionLabelsKept;
    if (!handledMarkers && !removedHomeworkParagraphs) {
      throw new Error('Không tìm thấy dòng NDTC/NDTC:, NDTCn, Giải NDTC/Giải NDTC:, Giải NDTCn hoặc ***Hết NDTC*** để xử lý trong file này.');
    }

    let removedImages = options.includeImages === false ? removePrintImages(xmlDoc) : 0;
    let removedBackgrounds = removeWordBackgroundFormatting(xmlDoc);
    let fontRuns = applyTimesNewRomanToTextRuns(xmlDoc);
    ensureReadableTextAfterBackgroundRemoval(xmlDoc);
    zip.file('word/document.xml', serializeWordXml(xmlDoc, xmlText));

    const supplemental = await patchAdditionalWordXmlParts(zip, options);
    removedImages += supplemental.removedImages;
    removedBackgrounds += supplemental.removedBackgrounds;
    fontRuns += supplemental.fontRuns;

    const blob = await zip.generateAsync({
      type:'blob',
      mimeType:'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
    });
    return {
      blob,
      handledMarkers,
      removedMarkerParagraphs,
      solutionLabelsKept,
      centeredNdTc1Title,
      removedImages,
      removedHomeworkParagraphs,
      removedBackgrounds,
      fontRuns,
      handledByType
    };
  }

  function outputPrintName(fileName) {
    const raw = String(fileName || 'Bai_giang.docx');
    if (/\.(docx|docm)$/i.test(raw)) return raw.replace(/\.(docx|docm)$/i, '_de_in.$1');
    return raw + '_de_in.docx';
  }

  function allLessonActionButtons() {
    return Array.from(listEl && listEl.querySelectorAll('.lesson-plan-file-btn, .lesson-plan-export-btn') || []);
  }

  async function exportOriginalLesson(file, trigger) {
    if (loading) return;
    loading = true;
    updateButtonState();
    const controls = allLessonActionButtons();
    controls.forEach((node) => { node.disabled = true; });
    setStatus(`Đang xuất nguyên trạng ${file.name}...`, '');
    try {
      const blob = await fetchLessonBlob(file);
      downloadBlob(blob, file.name);
      setStatus(`Đã xuất nguyên trạng ${file.name}.`, 'ok');
    } catch (error) {
      const message = error && error.message ? error.message : 'Không xuất được file Word nguyên trạng.';
      setStatus(message, 'err');
      notify(message, 'Không xuất được Bài giảng');
    } finally {
      loading = false;
      controls.forEach((node) => { node.disabled = false; });
      updateButtonState();
      if (trigger instanceof HTMLElement) trigger.focus({ preventScroll:true });
    }
  }

  async function exportPrintLesson(file, trigger, options = {}) {
    if (loading) return;
    loading = true;
    updateButtonState();
    const controls = allLessonActionButtons();
    controls.forEach((node) => { node.disabled = true; });
    setStatus(`Đang tạo bản in của ${file.name} theo lựa chọn...`, '');
    try {
      const sourceBlob = await fetchLessonBlob(file);
      const cleaned = await makePrintLessonBlob(sourceBlob, options);
      const outputName = outputPrintName(file.name);
      downloadBlob(cleaned.blob, outputName);
      setStatus(`Đã tạo ${outputName}: ${options.includeImages === false ? 'không xuất hình' : 'có hình'}, ${options.includeHomework === false ? 'không xuất bài tập về nhà' : 'có bài tập về nhà'}.`, 'ok');
    } catch (error) {
      const message = error && error.message ? error.message : 'Không tạo được bản Word để in.';
      setStatus(message, 'err');
      notify(message, 'Không xuất được bản in');
    } finally {
      loading = false;
      controls.forEach((node) => { node.disabled = false; });
      updateButtonState();
      if (trigger instanceof HTMLElement) trigger.focus({ preventScroll:true });
    }
  }

  function renderFiles(files) {
    if (!(listEl instanceof HTMLElement)) return;
    listEl.replaceChildren();
    if (!files.length) {
      const empty = document.createElement('div');
      empty.className = 'lesson-plan-empty';
      empty.textContent = 'Chưa có kế hoạch bài dạy trong thư mục của Lớp-Môn này.';
      listEl.appendChild(empty);
      return;
    }
    files.forEach((file) => {
      const card = document.createElement('article');
      card.className = 'lesson-plan-file-card';

      const item = document.createElement('button');
      item.type = 'button';
      item.className = 'lesson-plan-file-btn';
      item.dataset.lessonPlanPath = file.path;
      item.dataset.lessonPlanName = file.name;
      item.title = 'Bấm để trình chiếu bài giảng';

      const icon = document.createElement('span');
      icon.className = 'lesson-plan-file-icon';
      icon.setAttribute('aria-hidden', 'true');
      icon.textContent = '📄';

      const text = document.createElement('span');
      text.className = 'lesson-plan-file-text';
      const title = document.createElement('span');
      title.className = 'lesson-plan-file-title';
      title.textContent = humanTitle(file);
      text.append(title);
      item.append(icon, text);
      item.addEventListener('click', () => openLessonFile(file, item));

      const actions = document.createElement('div');
      actions.className = 'lesson-plan-file-actions';

      const originalBtn = document.createElement('button');
      originalBtn.type = 'button';
      originalBtn.className = 'lesson-plan-export-btn lesson-plan-export-original-btn';
      originalBtn.textContent = 'Xuất nguyên trạng';
      originalBtn.title = 'Tải đúng file Word đang lưu trên máy chủ';
      originalBtn.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        exportOriginalLesson(file, originalBtn);
      });

      const printBtn = document.createElement('button');
      printBtn.type = 'button';
      printBtn.className = 'lesson-plan-export-btn lesson-plan-export-print-btn';
      printBtn.textContent = 'Xuất để in';
      printBtn.title = 'Chọn xuất hình và bài tập về nhà trước khi tải bản Word để in';
      printBtn.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        openPrintOptions(file, printBtn);
      });

      actions.append(originalBtn, printBtn);
      card.append(item, actions);
      listEl.appendChild(card);
    });
  }

  function openModal() {
    lastFocus = document.activeElement instanceof HTMLElement ? document.activeElement : button;
    modal.hidden = false;
    document.documentElement.classList.add('modal-open');
    if (bodyEl instanceof HTMLElement) bodyEl.scrollTop = 0;
    requestAnimationFrame(() => closeBtn && closeBtn.focus({ preventScroll:true }));
  }

  function closeModal(restoreFocus = true) {
    closePrintOptions();
    modal.hidden = true;
    if (!document.querySelector('.cv7991-editor-modal:not([hidden]), .regular-test-modal:not([hidden]), .class-manager-modal:not([hidden])')) {
      document.documentElement.classList.remove('modal-open');
    }
    if (restoreFocus && lastFocus && lastFocus.isConnected) lastFocus.focus({ preventScroll:true });
  }

  async function loadList(force = false) {
    if (loading) return;
    const mon = currentMon();
    const folder = selectedLessonFolder(mon);
    if (!currentLoggedIn()) throw new Error('Bạn cần đăng nhập trước khi mở Bài giảng.');
    if (!currentLessonAccess()) throw new Error('Tài khoản chưa được quản trị viên cấp quyền sử dụng Bài giảng.');
    if (!mon) throw new Error('Bạn chưa chọn lớp - môn ở trên, phía phải');
    if (!folder) throw new Error(`Chưa xác định được thư mục Bài giảng tương ứng với ${mon}.`);

    loading = true;
    activeFolder = folder;
    updateButtonState();
    if (refreshBtn instanceof HTMLButtonElement) refreshBtn.disabled = true;
    if (currentClassEl instanceof HTMLElement) currentClassEl.textContent = `Lớp-Môn: ${mon}`;
    setStatus(`Đang đọc danh sách kế hoạch bài dạy trong Bai_giang/${folder}/...`, '');
    if (listEl instanceof HTMLElement) listEl.replaceChildren();

    try {
      const discovery = await discoverLessonFiles(folder);
      if (folder !== activeFolder) return;
      renderFiles(discovery.files || []);
      if (discovery.files && discovery.files.length) {
        setStatus(`Đã tìm thấy ${discovery.files.length} kế hoạch bài dạy. Bấm tên bài để trình chiếu hoặc chọn nút xuất ở cuối ô.`, 'ok');
      } else {
        const details = Array.isArray(discovery.errors) && discovery.errors.length
          ? ` Chi tiết: ${discovery.errors.join(' | ')}`
          : '';
        setStatus(`Chưa đọc được file Word trong Bai_giang/${folder}/.${details}`, 'err');
      }
    } finally {
      loading = false;
      if (refreshBtn instanceof HTMLButtonElement) refreshBtn.disabled = false;
      updateButtonState();
    }
  }

  async function openLessonFile(file, itemButton) {
    if (loading) return;
    loading = true;
    updateButtonState();
    const allButtons = allLessonActionButtons();
    allButtons.forEach((node) => { node.disabled = true; });
    setStatus(`Đang tải ${file.name}...`, '');
    try {
      const blob = await fetchLessonBlob(file);
      const wordFile = new File([blob], file.name, {
        type:/\.docm$/i.test(file.name)
          ? 'application/vnd.ms-word.document.macroEnabled.12'
          : 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
        lastModified:Date.now()
      });

      closeModal(false);
      lessonInternalLoad = true;
      setLessonPresentationMode(true);
      try {
        if (typeof window.mvipLoadWordPresentationFile === 'function') {
          await window.mvipLoadWordPresentationFile(wordFile);
        } else if (typeof DataTransfer === 'function') {
          const transfer = new DataTransfer();
          transfer.items.add(wordFile);
          wordFileInput.files = transfer.files;
          wordFileInput.dispatchEvent(new Event('change', { bubbles:true }));
        } else {
          throw new Error('Không tìm thấy bộ nạp Trình chiếu Word trong trình duyệt này.');
        }
      } finally {
        lessonInternalLoad = false;
      }
    } catch (error) {
      setLessonPresentationMode(false);
      if (modal.hidden) openModal();
      const message = error && error.message ? error.message : 'Không mở được kế hoạch bài dạy.';
      setStatus(message, 'err');
      notify(message, 'Không mở được Bài giảng');
    } finally {
      loading = false;
      allButtons.forEach((node) => { node.disabled = false; });
      updateButtonState();
      if (!modal.hidden && itemButton instanceof HTMLElement) itemButton.focus({ preventScroll:true });
    }
  }

  if (wordPresenterCloseBtn instanceof HTMLElement) {
    wordPresenterCloseBtn.addEventListener('click', () => setLessonPresentationMode(false));
  }
  wordFileInput.addEventListener('change', () => {
    if (!lessonInternalLoad) setLessonPresentationMode(false);
  }, true);

  button.addEventListener('click', async () => {
    if (window.mvipLimitedAccess && window.mvipLimitedAccess.guardLogin()) return;
    if (!currentLessonAccess()) {
      notify('Tài khoản chưa được quản trị viên cấp quyền sử dụng Bài giảng.', 'Thông báo');
      return;
    }
    if (!currentMon()) {
      notify('Bạn chưa chọn lớp - môn ở trên, phía phải', 'Thông báo');
      return;
    }
    try {
      openModal();
      await loadList(true);
    } catch (error) {
      const message = error && error.message ? error.message : 'Không mở được danh sách Bài giảng.';
      setStatus(message, 'err');
      notify(message, 'Thông báo');
    }
  });

  if (refreshBtn instanceof HTMLElement) refreshBtn.addEventListener('click', () => {
    loadList(true).catch((error) => setStatus(error && error.message ? error.message : String(error), 'err'));
  });
  if (closeBtn instanceof HTMLElement) closeBtn.addEventListener('click', () => closeModal());
  modal.addEventListener('click', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    if (target && target.closest('[data-lesson-plan-close="1"]')) closeModal();
  });
  document.addEventListener('keydown', (event) => {
    if (event.key === 'Escape' && !modal.hidden) {
      event.preventDefault();
      closeModal();
    }
  });

  ['classSubjectSelect', 'compactClassSubjectSelect'].forEach((id) => {
    const select = document.getElementById(id);
    if (select instanceof HTMLElement) {
      select.addEventListener('change', () => {
        activeFolder = '';
        updateButtonState();
        if (!modal.hidden) loadList(true).catch((error) => setStatus(error && error.message ? error.message : String(error), 'err'));
      });
    }
  });

  // Đăng nhập/đăng xuất và khôi phục phiên đều thay đổi state không qua cùng một sự kiện DOM.
  // Kiểm tra rất nhẹ mỗi 1,5 giây để trạng thái nút luôn đúng mà không đọc hay xử lý lại dữ liệu lớp.
  async function refreshLessonAccess(force = false) {
    if (!currentLoggedIn() || lessonAccessRefreshPending) return;
    const now = Date.now();
    if (!force && now - lastLessonAccessRefreshAt < 15000) return;
    lessonAccessRefreshPending = true;
    lastLessonAccessRefreshAt = now;
    try {
      if (typeof refreshSessionInfo === 'function') await refreshSessionInfo();
    } catch (_) {
      // Giữ cơ chế đăng nhập hiện tại xử lý lỗi phiên; không hiện thông báo lặp lại ở đây.
    } finally {
      lessonAccessRefreshPending = false;
      updateButtonState();
    }
  }

  updateButtonState();
  refreshLessonAccess(true);
  window.setInterval(updateButtonState, 1500);
  window.setInterval(() => refreshLessonAccess(false), 15000);
})();
</script>


<!-- Bản điều chỉnh 2026-08-23: vẽ hình học trực tiếp trên màn hình trình chiếu, không kích hoạt nhầm cửa sổ phóng ảnh; bổ sung hộp vẽ hình học trước Hoàn tác trong ảnh phóng to. -->
<!-- Bản điều chỉnh 2026-08-23: thêm hộp công cụ vẽ hình học sau Bút nhớ cho Trình chiếu Word và Dùng câu hỏi MVIP. -->

<style id="mvip-full-whiteboard-style-20260825">
  .mvip-whiteboard-open-btn {
    width:38px; min-width:38px; height:36px; min-height:36px; padding:0;
    display:inline-flex; align-items:center; justify-content:center;
    border:2px solid #94a3b8; border-radius:11px; background:#fff; color:#334155;
    box-shadow:0 4px 12px rgba(15,23,42,.10); cursor:pointer; flex:0 0 auto;
  }
  .mvip-whiteboard-open-btn:hover { background:#f8fafc; border-color:#64748b; }
  .mvip-whiteboard-open-btn[aria-pressed="true"] {
    border-color:#2563eb; color:#1d4ed8; background:#eff6ff;
    box-shadow:0 0 0 3px rgba(37,99,235,.14);
  }
  .mvip-whiteboard-open-btn svg { width:22px; height:22px; pointer-events:none; }

  #mvipWhiteboardPanel[hidden] { display:none !important; }
  #mvipWhiteboardPanel {
    position:fixed; inset:0; width:100vw; height:100vh;
    z-index:130500; box-sizing:border-box; display:flex; flex-direction:column;
    background:#fff; color:#0f172a; border:0; border-radius:0;
    box-shadow:none; isolation:isolate; overflow:visible;
  }
  #mvipWhiteboardPanel.is-half {
    inset:auto; width:50vw; height:50vh;
    min-width:420px; min-height:300px; max-width:calc(100vw - 16px); max-height:calc(100vh - 16px);
    border:2px solid #94a3b8; border-radius:16px;
    box-shadow:0 24px 60px rgba(15,23,42,.34); overflow:visible;
  }
  .mvip-whiteboard-head {
    position:relative; z-index:30; flex:0 0 auto; min-height:56px; box-sizing:border-box;
    display:flex; align-items:center; justify-content:space-between; gap:10px;
    padding:8px 10px 8px 14px; background:#fff; border-bottom:1px solid #cbd5e1;
    border-radius:inherit; border-bottom-left-radius:0; border-bottom-right-radius:0;
    user-select:none; -webkit-user-select:none;
  }
  .mvip-whiteboard-title {
    display:flex; align-items:center; gap:8px; min-width:0; padding:6px 8px;
    font:900 17px/1.15 Arial,Helvetica,sans-serif; color:#0f172a; white-space:nowrap;
  }
  #mvipWhiteboardPanel.is-half .mvip-whiteboard-title { cursor:move; }
  #mvipWhiteboardPanel.is-dragging .mvip-whiteboard-title { cursor:grabbing; }
  .mvip-whiteboard-title svg { width:24px; height:24px; color:#2563eb; pointer-events:none; }
  #mvipWhiteboardResizeHandle {
    display:none; position:absolute; right:-2px; bottom:-2px; z-index:90;
    width:28px; height:28px; box-sizing:border-box; cursor:nwse-resize;
    touch-action:none; user-select:none; -webkit-user-select:none;
    border:0; border-radius:0 0 14px 0; background:transparent;
  }
  #mvipWhiteboardPanel.is-half #mvipWhiteboardResizeHandle { display:block; }
  #mvipWhiteboardResizeHandle::after {
    content:""; position:absolute; right:6px; bottom:6px; width:11px; height:11px;
    border-right:3px solid #2563eb; border-bottom:3px solid #2563eb;
    filter:drop-shadow(0 1px 1px rgba(15,23,42,.22)); pointer-events:none;
  }
  #mvipWhiteboardPanel.is-resizing { user-select:none; -webkit-user-select:none; }
  #mvipWhiteboardPanel.is-resizing #mvipWhiteboardResizeHandle { cursor:nwse-resize; }

  #mvipWhiteboardToolDock {
    position:relative; display:flex; align-items:center; justify-content:flex-end; gap:5px;
    min-width:0; flex-wrap:wrap;
  }
  .mvip-whiteboard-tool-btn,
  .mvip-whiteboard-action-btn,
  .mvip-whiteboard-color-btn {
    width:38px; min-width:38px; height:38px; min-height:38px; box-sizing:border-box;
    display:inline-flex; align-items:center; justify-content:center; gap:5px; padding:0;
    border:1px solid #cbd5e1; border-radius:10px; background:#fff; color:#334155;
    font:800 12px/1 Arial,Helvetica,sans-serif; cursor:pointer; white-space:nowrap;
  }
  .mvip-whiteboard-tool-btn:hover,
  .mvip-whiteboard-action-btn:hover,
  .mvip-whiteboard-color-btn:hover,
  .mvip-whiteboard-tool-btn[aria-pressed="true"],
  .mvip-whiteboard-action-btn[aria-pressed="true"] {
    background:#eff6ff; border-color:#2563eb; color:#1d4ed8;
    box-shadow:0 0 0 2px rgba(37,99,235,.12);
  }
  .mvip-whiteboard-tool-btn svg,
  .mvip-whiteboard-action-btn svg { width:20px; height:20px; pointer-events:none; }
  .mvip-whiteboard-color-btn { position:relative; }
  .mvip-whiteboard-color-swatch {
    width:20px; height:20px; border-radius:50%; border:2px solid #fff;
    box-shadow:0 0 0 1px #64748b; background:var(--mvip-whiteboard-color,#ef4444);
    pointer-events:none;
  }
  .mvip-whiteboard-color-menu[hidden] { display:none !important; }
  .mvip-whiteboard-color-menu {
    position:absolute; right:0; top:calc(100% + 7px); z-index:360;
    display:flex; gap:7px; padding:8px; border:1px solid #cbd5e1; border-radius:12px;
    background:#fff; box-shadow:0 14px 32px rgba(15,23,42,.22);
  }
  .mvip-whiteboard-color-choice {
    width:28px; height:28px; padding:0; border-radius:50%; border:3px solid #fff;
    box-shadow:0 0 0 1px #94a3b8; cursor:pointer;
  }
  .mvip-whiteboard-color-choice[aria-checked="true"] { box-shadow:0 0 0 3px #2563eb; }
  #mvipWhiteboardCloseBtn { width:auto; min-width:58px; padding:0 10px; border-color:#ef4444; color:#dc2626; }
  #mvipWhiteboardCloseBtn:hover { background:#fef2f2; border-color:#dc2626; }

  #mvipWhiteboardViewport {
    position:relative; flex:1 1 auto; min-width:0; min-height:0; overflow:auto;
    background:#fff; border-radius:inherit; border-top-left-radius:0; border-top-right-radius:0;
    overscroll-behavior:contain; scrollbar-gutter:stable both-edges;
  }
  #mvipWhiteboardSurface {
    position:relative; flex:none; width:2400px; height:1800px; min-width:100%; min-height:100%;
    overflow:visible; box-sizing:border-box;
    background-color:#fff;
    background-image:repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 36.8px,
      rgba(100,116,139,.18) 36.8px,
      rgba(100,116,139,.18) 37.8px
    );
  }
  #mvipWhiteboardSurface::before {
    content:""; position:absolute; inset:0; pointer-events:none;
    box-shadow:inset 0 0 0 1px rgba(148,163,184,.22); z-index:20;
  }
  .mvip-whiteboard-ink-canvas {
    position:absolute; inset:0; display:block; width:100%; height:100%; margin:0; padding:0;
    border:0; background:transparent; box-shadow:none; touch-action:none; user-select:none;
    -webkit-user-select:none; pointer-events:none;
  }
  #mvipWhiteboardInkCanvas { z-index:5; }
  #mvipWhiteboardLaserCanvas { z-index:7; opacity:1; transition:opacity .28s linear; }
  #mvipWhiteboardLaserCanvas.is-fading { opacity:0; }
  #mvipWhiteboardInkCanvas.is-active { pointer-events:auto; }
  #mvipWhiteboardInkCanvas[data-tool="pen"],
  #mvipWhiteboardInkCanvas[data-tool="highlighter"] { cursor:crosshair; }
  #mvipWhiteboardInkCanvas[data-tool="eraser"],
  #mvipWhiteboardInkCanvas[data-tool="laser"] { cursor:none; }
  #mvipWhiteboardEraserCursor {
    position:absolute; z-index:18; display:none; pointer-events:none; box-sizing:border-box;
    border:2px solid #334155; border-radius:3px; background:rgba(255,255,255,.48);
    transform:translate(-50%,-50%);
  }
  #mvipWhiteboardEraserCursor.is-visible { display:block; }
  #mvipWhiteboardSurface > .cv7991-geometry-canvas { z-index:8 !important; }
  #mvipWhiteboardCaptureOverlay {
    position:absolute; inset:0; z-index:26; display:none; pointer-events:none;
    cursor:crosshair; touch-action:none; user-select:none; -webkit-user-select:none;
    background:rgba(37,99,235,.035);
  }
  #mvipWhiteboardCaptureOverlay.is-active { display:block; pointer-events:auto; }
  #mvipWhiteboardCaptureSelection {
    position:absolute; left:0; top:0; width:0; height:0; display:none;
    box-sizing:border-box; border:2px dashed #2563eb; border-radius:5px;
    background:rgba(37,99,235,.10); box-shadow:0 0 0 99999px rgba(15,23,42,.12);
    pointer-events:none;
  }
  #mvipWhiteboardCaptureOverlay.is-selecting #mvipWhiteboardCaptureSelection { display:block; }
  #mvipWhiteboardCaptureBtn[aria-pressed="true"] {
    background:#dbeafe; border-color:#1d4ed8; color:#1d4ed8;
    box-shadow:0 0 0 2px rgba(37,99,235,.18);
  }
  #mvipWhiteboardCaptureBtn.is-capture-ready {
    background:#dcfce7; border-color:#16a34a; color:#15803d;
  }
  .mvip-whiteboard-geometry-menu {
    top:calc(100% + 8px) !important; right:0 !important; left:auto !important;
    transform:none !important; width:min(350px,calc(100vw - 24px)) !important;
  }
  #mvipWhiteboardPanel.is-half .mvip-whiteboard-geometry-menu {
    width:min(330px,calc(50vw - 28px)) !important;
  }
  body.mvip-whiteboard-open { overflow:hidden; }
  @media (max-width:760px) {
    #mvipWhiteboardPanel.is-half { width:calc(100vw - 16px); min-width:0; height:calc(100vh - 16px); }
    .mvip-whiteboard-title span { display:none; }
    .mvip-whiteboard-geometry-menu { width:min(320px,calc(100vw - 20px)) !important; }
    .mvip-whiteboard-head { align-items:flex-start; }
    #mvipWhiteboardToolDock { gap:4px; }
    .mvip-whiteboard-tool-btn,
    .mvip-whiteboard-action-btn,
    .mvip-whiteboard-color-btn { width:34px; min-width:34px; height:34px; min-height:34px; }
  }
</style>
<script id="mvip-full-whiteboard-bootstrap-20260825">
(() => {
  'use strict';
  if (document.getElementById('mvipWhiteboardPanel')) return;

  const ICONS = Object.freeze({
    board:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><rect x="3" y="4" width="18" height="14" rx="2" stroke="currentColor" stroke-width="2"/><path d="M8 21h8M12 18v3M7 9h10M7 13h6" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    open:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><rect x="3" y="4" width="18" height="16" rx="2" fill="#fff" stroke="currentColor" stroke-width="2"/><path d="M7 9h10M7 13h7" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>',
    cursor:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 3.5 18.2 13l-6.1 1.1 3.4 5.1-2.8 1.8-3.3-5.2L5 20V3.5Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    pen:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 20l4.2-1 10.4-10.4a2.1 2.1 0 0 0 0-3L18.4 5.4a2.1 2.1 0 0 0-3 0L5 15.8 4 20Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/><path d="m13.9 6.9 3.2 3.2M4 20h5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    eraser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m7.2 18.7-3.1-3.1a2 2 0 0 1 0-2.8l8.5-8.5a2 2 0 0 1 2.8 0l4.3 4.3a2 2 0 0 1 0 2.8l-7.3 7.3H7.2Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m9.2 7.7 7.1 7.1M7.2 18.7H20" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    laser:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M5 19 15.7 8.3l-3-3L2 16l3 3Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m13.4 10.6 2.8 2.8M17.5 4.5 20 2M19.5 8H23M16 1v3.5" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    highlighter:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m5 14 8.8-8.8 5 5L10 19H5v-5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="m11.5 7.5 5 5M3 22h18" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>',
    undo:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M9 7 4 12l5 5M5 12h8a6 6 0 1 1 0 12" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" transform="translate(0 -3)"/></svg>',
    clear:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 7h16M9 7V4h6v3M7 7l1 13h8l1-13M10 11v5M14 11v5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    /* Dùng đúng cặp biểu tượng hai mũi tên chéo của nút toàn màn hình trình chiếu. */
    shrink:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M21 3L14 10M14 5V10H19M3 21L10 14M10 19V14H5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    expand:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M14 10L21 3M16 3H21V8M10 14L3 21M8 21H3V16" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    capture:'<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M8 3H4a1 1 0 0 0-1 1v4M16 3h4a1 1 0 0 1 1 1v4M21 16v4a1 1 0 0 1-1 1h-4M8 21H4a1 1 0 0 1-1-1v-4" stroke="currentColor" stroke-width="2" stroke-linecap="round"/><rect x="7" y="7" width="10" height="10" rx="1.5" stroke="currentColor" stroke-width="1.7" stroke-dasharray="2.4 2.4"/></svg>'
  });
  const TOOL_DEFS = Object.freeze([
    { id:'cursor', label:'Con trỏ chuột' },
    { id:'pen', label:'Bút viết' },
    { id:'eraser', label:'Tẩy' },
    { id:'laser', label:'Bút laze' },
    { id:'highlighter', label:'Bút nhớ' }
  ]);
  const COLORS = Object.freeze([
    { value:'#ef4444', name:'Đỏ' },
    { value:'#7c3aed', name:'Tím' },
    { value:'#facc15', name:'Vàng' },
    { value:'#2563eb', name:'Xanh' },
    { value:'#111827', name:'Đen' }
  ]);
  const HIGHLIGHTER_COLORS = Object.freeze([
    { value:'#A8FF00', name:'Xanh huỳnh quang hiện tại' },
    { value:'#D4FF00', name:'Vàng xanh huỳnh quang' },
    { value:'#FF4FA3', name:'Hồng' },
    { value:'#A855F7', name:'Tím' }
  ]);

  const panel = document.createElement('section');
  panel.id = 'mvipWhiteboardPanel';
  panel.hidden = true;
  panel.setAttribute('role', 'dialog');
  panel.setAttribute('aria-label', 'Bảng trắng');
  panel.innerHTML = `
    <header class="mvip-whiteboard-head">
      <div class="mvip-whiteboard-title" id="mvipWhiteboardDragHandle">${ICONS.board}<span>Bảng trắng</span></div>
      <div id="mvipWhiteboardToolDock" role="toolbar" aria-label="Bộ công cụ bảng trắng">
        ${TOOL_DEFS.map((tool) => `<button class="mvip-whiteboard-tool-btn" data-whiteboard-native-tool="${tool.id}" type="button" aria-label="${tool.label}" title="${tool.label}">${ICONS[tool.id]}</button>`).join('')}
        <button class="mvip-whiteboard-color-btn" id="mvipWhiteboardColorBtn" type="button" aria-haspopup="menu" aria-expanded="false" title="Chọn màu nét vẽ">
          <span class="mvip-whiteboard-color-swatch" aria-hidden="true"></span>
        </button>
        <div class="mvip-whiteboard-color-menu" id="mvipWhiteboardColorMenu" role="menu" aria-label="Chọn màu nét vẽ" hidden></div>
        <button class="mvip-whiteboard-action-btn" id="mvipWhiteboardCaptureBtn" type="button" title="Chụp vùng bảng trắng" aria-label="Chụp vùng bảng trắng">${ICONS.capture}</button>
        <button class="mvip-whiteboard-action-btn" id="mvipWhiteboardUndoBtn" type="button" title="Hoàn tác" aria-label="Hoàn tác">${ICONS.undo}</button>
        <button class="mvip-whiteboard-action-btn" id="mvipWhiteboardClearBtn" type="button" title="Xóa toàn bộ bảng" aria-label="Xóa toàn bộ bảng">${ICONS.clear}</button>
        <button class="mvip-whiteboard-action-btn" id="mvipWhiteboardSizeBtn" type="button" title="Thu nhỏ về nửa màn hình" aria-label="Thu nhỏ về nửa màn hình">${ICONS.shrink}</button>
        <button class="mvip-whiteboard-action-btn" id="mvipWhiteboardCloseBtn" type="button">Đóng</button>
      </div>
    </header>
    <div id="mvipWhiteboardViewport" aria-label="Khung cuộn bảng trắng">
      <div id="mvipWhiteboardSurface" aria-label="Vùng bảng trắng có thể mở rộng">
        <canvas id="mvipWhiteboardInkCanvas" class="mvip-whiteboard-ink-canvas" aria-label="Lớp viết vẽ bảng trắng"></canvas>
        <canvas id="mvipWhiteboardLaserCanvas" class="mvip-whiteboard-ink-canvas" aria-hidden="true"></canvas>
        <div id="mvipWhiteboardEraserCursor" aria-hidden="true"></div>
        <div id="mvipWhiteboardCaptureOverlay" aria-label="Kéo chuột để chọn vùng cần chụp">
          <div id="mvipWhiteboardCaptureSelection" aria-hidden="true"></div>
        </div>
      </div>
    </div>
    <span id="mvipWhiteboardResizeHandle" role="separator" aria-label="Kéo để thay đổi kích thước bảng trắng" title="Kéo để co giãn bảng trắng"></span>
    <span id="mvipWhiteboardProgress" hidden>Bảng trắng</span>`;
  document.body.appendChild(panel);

  const viewport = panel.querySelector('#mvipWhiteboardViewport');
  const surface = panel.querySelector('#mvipWhiteboardSurface');
  const inkCanvas = panel.querySelector('#mvipWhiteboardInkCanvas');
  const laserCanvas = panel.querySelector('#mvipWhiteboardLaserCanvas');
  const eraserCursor = panel.querySelector('#mvipWhiteboardEraserCursor');
  const dock = panel.querySelector('#mvipWhiteboardToolDock');
  const dragHandle = panel.querySelector('#mvipWhiteboardDragHandle');
  const colorBtn = panel.querySelector('#mvipWhiteboardColorBtn');
  const colorMenu = panel.querySelector('#mvipWhiteboardColorMenu');
  const colorSwatch = panel.querySelector('.mvip-whiteboard-color-swatch');
  const captureBtn = panel.querySelector('#mvipWhiteboardCaptureBtn');
  const captureOverlay = panel.querySelector('#mvipWhiteboardCaptureOverlay');
  const captureSelection = panel.querySelector('#mvipWhiteboardCaptureSelection');
  const undoBtn = panel.querySelector('#mvipWhiteboardUndoBtn');
  const clearBtn = panel.querySelector('#mvipWhiteboardClearBtn');
  const sizeBtn = panel.querySelector('#mvipWhiteboardSizeBtn');
  const closeBtn = panel.querySelector('#mvipWhiteboardCloseBtn');
  const resizeHandle = panel.querySelector('#mvipWhiteboardResizeHandle');
  const toolButtons = new Map();
  panel.querySelectorAll('[data-whiteboard-native-tool]').forEach((button) => toolButtons.set(button.getAttribute('data-whiteboard-native-tool'), button));

  const state = {
    tool:'cursor', color:'#ef4444', highlighterColor:'#A8FF00', eraserWidth:38,
    strokes:[], currentStroke:null, drawing:false, pointerId:null, snapGuide:null,
    width:0, height:0, dpr:1, resizeFrame:0,
    laserPoints:[], laserTimer:0,
    drag:null, resize:null,
    viewportScroll:{ left:0, top:0 },
    workspaceWidth:2400, workspaceHeight:1800, workspaceGrowFrame:0,
    capture:null, captureSerial:0
  };
  try {
    const storedColor = String(localStorage.getItem('mvip_whiteboard_color') || '').trim();
    if (COLORS.some((entry) => entry.value === storedColor)) state.color = storedColor;
    const storedHighlighter = String(localStorage.getItem('mvip_highlighter_color') || '').trim();
    if (HIGHLIGHTER_COLORS.some((entry) => entry.value === storedHighlighter)) state.highlighterColor = storedHighlighter;
    const storedEraser = Number(localStorage.getItem('mvip_whiteboard_eraser_size') || 38);
    if ([16,26,38,52].includes(storedEraser)) state.eraserWidth = storedEraser;
  } catch (_) {}

  function clamp(value, min, max) { return Math.max(min, Math.min(max, Number(value) || 0)); }
  function rememberViewportPosition(){
    state.viewportScroll.left=Math.max(0,Number(viewport.scrollLeft)||0);
    state.viewportScroll.top=Math.max(0,Number(viewport.scrollTop)||0);
    return { left:state.viewportScroll.left, top:state.viewportScroll.top };
  }
  function restoreViewportPosition(){
    const maxLeft=Math.max(0,viewport.scrollWidth-viewport.clientWidth);
    const maxTop=Math.max(0,viewport.scrollHeight-viewport.clientHeight);
    viewport.scrollLeft=clamp(state.viewportScroll.left,0,maxLeft);
    viewport.scrollTop=clamp(state.viewportScroll.top,0,maxTop);
  }
  function rescaleNormalizedPoint(point, scaleX, scaleY) {
    if (!point || typeof point !== 'object') return;
    point.x = (Number(point.x) || 0) * scaleX;
    point.y = (Number(point.y) || 0) * scaleY;
  }
  function rescaleInkContent(oldWidth, oldHeight, newWidth, newHeight) {
    if (!(oldWidth > 0 && oldHeight > 0 && newWidth > 0 && newHeight > 0)) return;
    const scaleX = oldWidth / newWidth;
    const scaleY = oldHeight / newHeight;
    state.strokes.forEach((stroke) => (stroke.points || []).forEach((point) => rescaleNormalizedPoint(point, scaleX, scaleY)));
    if (state.currentStroke) (state.currentStroke.points || []).forEach((point) => rescaleNormalizedPoint(point, scaleX, scaleY));
    state.laserPoints.forEach((point) => rescaleNormalizedPoint(point, scaleX, scaleY));
  }
  function rescaleGeometryContent(oldWidth, oldHeight, newWidth, newHeight) {
    const geometry = window.mvipWhiteboardGeometryTool;
    const geometryState = geometry && geometry.state;
    if (!geometryState || !(oldWidth > 0 && oldHeight > 0 && newWidth > 0 && newHeight > 0)) return;
    const scaleX = oldWidth / newWidth;
    const scaleY = oldHeight / newHeight;
    const rescaleShape = (shape) => {
      if (!shape || typeof shape !== 'object') return;
      rescaleNormalizedPoint(shape.a, scaleX, scaleY);
      rescaleNormalizedPoint(shape.b, scaleX, scaleY);
    };
    (geometryState.shapes || []).forEach(rescaleShape);
    (geometryState.undo || []).forEach((snapshotShapes) => (snapshotShapes || []).forEach(rescaleShape));
    rescaleNormalizedPoint(geometryState.start, scaleX, scaleY);
    rescaleNormalizedPoint(geometryState.end, scaleX, scaleY);
    if (geometryState.autoSegment) {
      rescaleNormalizedPoint(geometryState.autoSegment.a, scaleX, scaleY);
      rescaleNormalizedPoint(geometryState.autoSegment.b, scaleX, scaleY);
    }
  }
  function workspaceIsBusy() {
    const geometry = window.mvipWhiteboardGeometryTool;
    const geometryState = geometry && geometry.state;
    return !!(state.drawing || (geometryState && (geometryState.dragging || geometryState.interaction || geometryState.autoSegment)));
  }
  function setWorkspaceSize(width, height) {
    const nextWidth = Math.max(1200, Math.ceil((Number(width) || state.workspaceWidth) / 400) * 400);
    const nextHeight = Math.max(900, Math.ceil((Number(height) || state.workspaceHeight) / 300) * 300);
    if (nextWidth === state.workspaceWidth && nextHeight === state.workspaceHeight) return false;
    const oldWidth = Math.max(1, state.width || state.workspaceWidth);
    const oldHeight = Math.max(1, state.height || state.workspaceHeight);
    rescaleInkContent(oldWidth, oldHeight, nextWidth, nextHeight);
    rescaleGeometryContent(oldWidth, oldHeight, nextWidth, nextHeight);
    state.workspaceWidth = nextWidth;
    state.workspaceHeight = nextHeight;
    surface.style.width = `${nextWidth}px`;
    surface.style.height = `${nextHeight}px`;
    scheduleResize();
    try {
      panel.dispatchEvent(new CustomEvent('mvip-whiteboard-workspace-resized', {
        detail:{ width:nextWidth, height:nextHeight }
      }));
    } catch (_) {}
    return true;
  }
  function ensureWorkspaceSize(extraWidth = 0, extraHeight = 0) {
    const visibleWidth = Math.max(1, viewport.clientWidth || 0);
    const visibleHeight = Math.max(1, viewport.clientHeight || 0);
    const minimumWidth = Math.max(2400, visibleWidth * 2, Number(extraWidth) || 0);
    const minimumHeight = Math.max(1800, visibleHeight * 2, Number(extraHeight) || 0);
    return setWorkspaceSize(
      Math.max(state.workspaceWidth, minimumWidth),
      Math.max(state.workspaceHeight, minimumHeight)
    );
  }
  function growWorkspaceNearEdge() {
    if (panel.hidden || workspaceIsBusy() || panel.getAttribute('data-split-content') === 'answer') return;
    const nearRight = viewport.scrollLeft + viewport.clientWidth >= viewport.scrollWidth - 280;
    const nearBottom = viewport.scrollTop + viewport.clientHeight >= viewport.scrollHeight - 280;
    if (!nearRight && !nearBottom) return;
    setWorkspaceSize(
      state.workspaceWidth + (nearRight ? Math.max(1200, viewport.clientWidth) : 0),
      state.workspaceHeight + (nearBottom ? Math.max(900, viewport.clientHeight) : 0)
    );
  }
  function scheduleWorkspaceGrowth() {
    if (state.workspaceGrowFrame) cancelAnimationFrame(state.workspaceGrowFrame);
    state.workspaceGrowFrame = requestAnimationFrame(() => {
      state.workspaceGrowFrame = 0;
      growWorkspaceNearEdge();
    });
  }
  function configureCanvas(canvas, width, height, dpr) {
    canvas.width = Math.max(1, Math.round(width * dpr));
    canvas.height = Math.max(1, Math.round(height * dpr));
    canvas.style.width = `${width}px`;
    canvas.style.height = `${height}px`;
  }
  function clearPixels(canvas) {
    const context = canvas.getContext('2d');
    if (!context) return;
    context.save();
    context.setTransform(1,0,0,1,0,0);
    context.clearRect(0,0,canvas.width,canvas.height);
    context.restore();
  }
  function resizeCanvases() {
    ensureWorkspaceSize();
    const rect = surface.getBoundingClientRect();
    const width = Math.max(1, Math.round(rect.width));
    const height = Math.max(1, Math.round(rect.height));
    /* Giữ ngân sách điểm ảnh ổn định khi bảng tự mở rộng rất lớn. Canvas vẫn
       phủ toàn bộ bảng nhưng tự hạ mật độ điểm ảnh thay vì làm đầy bộ nhớ. */
    const requestedDpr = Math.max(1, Math.min(2, Number(devicePixelRatio) || 1));
    const budgetDpr = Math.sqrt(16000000 / Math.max(1, width * height));
    const dpr = Math.max(.5, Math.min(requestedDpr, budgetDpr));
    if (state.width === width && state.height === height && state.dpr === dpr) return;
    state.width = width; state.height = height; state.dpr = dpr;
    configureCanvas(inkCanvas, width, height, dpr);
    configureCanvas(laserCanvas, width, height, dpr);
    redrawInk();
  }
  function scheduleResize() {
    if (state.resizeFrame) cancelAnimationFrame(state.resizeFrame);
    state.resizeFrame = requestAnimationFrame(() => { state.resizeFrame = 0; resizeCanvases(); });
  }
  function normalizedPoint(event) {
    const rect = inkCanvas.getBoundingClientRect();
    const raw = {
      x:clamp((Number(event.clientX) - rect.left) / Math.max(1, rect.width), 0, 1),
      y:clamp((Number(event.clientY) - rect.top) / Math.max(1, rect.height), 0, 1)
    };
    if (state.tool !== 'pen' && state.tool !== 'highlighter') return raw;
    const geometry = window.mvipWhiteboardGeometryTool;
    if (!geometry || typeof geometry.snapInkPoint !== 'function') return raw;
    try {
      const snapped = geometry.snapInkPoint(raw, state.snapGuide);
      if (snapped && snapped.point) {
        if (!state.snapGuide && snapped.guide) state.snapGuide = snapped.guide;
        const rebased = snapped.guide && snapped.guide.rebaseStrokeStart;
        if (rebased && state.currentStroke && Array.isArray(state.currentStroke.points)) {
          state.currentStroke.points.forEach((_, index) => {
            state.currentStroke.points[index] = { x:rebased.x, y:rebased.y };
          });
          delete snapped.guide.rebaseStrokeStart;
        }
        return snapped.point;
      }
    } catch (_) {}
    return raw;
  }
  function cssPoint(point) {
    return { x:clamp(Number(point && point.x) * state.width, 0, state.width), y:clamp(Number(point && point.y) * state.height, 0, state.height) };
  }
  function strokeSettings(tool) {
    if (tool === 'eraser') return { width:state.eraserWidth, color:'#000', alpha:1, composite:'destination-out' };
    if (tool === 'highlighter') return { width:22, color:state.highlighterColor, alpha:.32, composite:'source-over' };
    return { width:2.6, color:state.color, alpha:1, composite:'source-over' };
  }
  function drawStroke(context, stroke, startIndex = 0) {
    const points = Array.isArray(stroke && stroke.points) ? stroke.points : [];
    if (!context || !points.length) return;
    const settings = stroke.settings || strokeSettings(stroke.tool);
    const firstIndex = Math.max(0, Math.min(points.length - 1, Number(startIndex) || 0));
    const first = cssPoint(points[firstIndex]);
    context.save();
    context.setTransform(state.dpr,0,0,state.dpr,0,0);
    context.lineCap = 'round'; context.lineJoin = 'round';
    context.lineWidth = Number(settings.width) || 2.6;
    context.strokeStyle = settings.color || '#ef4444';
    context.globalAlpha = Number.isFinite(Number(settings.alpha)) ? Number(settings.alpha) : 1;
    context.globalCompositeOperation = settings.composite || 'source-over';
    context.beginPath(); context.moveTo(first.x, first.y);
    if (points.length === 1 || firstIndex === points.length - 1) context.lineTo(first.x + .01, first.y + .01);
    else if (stroke.tool === 'pen' && points.length - firstIndex >= 3) {
      for (let index = firstIndex + 1; index < points.length - 1; index += 1) {
        const control = cssPoint(points[index]);
        const next = cssPoint(points[index + 1]);
        context.quadraticCurveTo(control.x, control.y, (control.x + next.x) / 2, (control.y + next.y) / 2);
      }
      const last = cssPoint(points[points.length - 1]);
      context.quadraticCurveTo(last.x, last.y, last.x, last.y);
    } else for (let index = firstIndex + 1; index < points.length; index += 1) {
      const point = cssPoint(points[index]); context.lineTo(point.x, point.y);
    }
    context.stroke(); context.restore();
  }
  function redrawInk() {
    clearPixels(inkCanvas);
    const context = inkCanvas.getContext('2d');
    if (!context) return;
    state.strokes.forEach((stroke) => drawStroke(context, stroke, 0));
    if (state.currentStroke) drawStroke(context, state.currentStroke, 0);
  }
  function clearLaser() {
    if (state.laserTimer) clearTimeout(state.laserTimer);
    state.laserTimer = 0; state.laserPoints = [];
    laserCanvas.classList.remove('is-fading'); laserCanvas.style.opacity = '1';
    clearPixels(laserCanvas);
  }
  function drawLaser() {
    clearPixels(laserCanvas);
    if (!state.laserPoints.length) return;
    const context = laserCanvas.getContext('2d');
    if (!context) return;
    context.save(); context.setTransform(state.dpr,0,0,state.dpr,0,0);
    context.lineCap='round'; context.lineJoin='round'; context.strokeStyle='#ef4444'; context.fillStyle='#ef4444';
    context.lineWidth=5.2; context.shadowColor='rgba(239,68,68,.92)'; context.shadowBlur=18;
    const first=cssPoint(state.laserPoints[0]);
    if (state.laserPoints.length>1) {
      context.beginPath(); context.moveTo(first.x,first.y);
      for(let i=1;i<state.laserPoints.length;i+=1){const p=cssPoint(state.laserPoints[i]);context.lineTo(p.x,p.y);} context.stroke();
    }
    const last=cssPoint(state.laserPoints[state.laserPoints.length-1]); context.beginPath(); context.arc(last.x,last.y,8.8,0,Math.PI*2); context.fill(); context.restore();
  }
  function scheduleLaserFade() {
    if (state.laserTimer) clearTimeout(state.laserTimer);
    state.laserTimer = setTimeout(() => {
      laserCanvas.classList.add('is-fading');
      state.laserTimer = setTimeout(clearLaser, 320);
    }, 360);
  }
  function updateEraserCursor(event) {
    if (state.tool !== 'eraser') { eraserCursor.classList.remove('is-visible'); return; }
    const rect = surface.getBoundingClientRect();
    eraserCursor.style.width = `${state.eraserWidth}px`; eraserCursor.style.height = `${state.eraserWidth}px`;
    eraserCursor.style.left = `${Number(event.clientX) - rect.left}px`; eraserCursor.style.top = `${Number(event.clientY) - rect.top}px`;
    eraserCursor.classList.add('is-visible');
  }
  function syncToolUi() {
    toolButtons.forEach((button, id) => button.setAttribute('aria-pressed', id === state.tool ? 'true' : 'false'));
    inkCanvas.classList.toggle('is-active', state.tool !== 'cursor');
    inkCanvas.setAttribute('data-tool', state.tool);
    colorSwatch.style.setProperty('--mvip-whiteboard-color', activeColorValue());
    colorBtn.title = state.tool === 'highlighter' ? 'Chọn màu bút nhớ' : 'Chọn màu nét vẽ';
    colorBtn.setAttribute('aria-label', colorBtn.title);
    if (state.tool !== 'eraser') eraserCursor.classList.remove('is-visible');
  }
  function setTool(value) {
    const next = TOOL_DEFS.some((entry) => entry.id === String(value || '')) ? String(value) : 'cursor';
    if (state.drawing) finishStroke();
    if (state.tool === 'laser' && next !== 'laser') clearLaser();
    state.tool = next; state.snapGuide = null; buildColorChoices(); syncToolUi(); resizeCanvases(); return state.tool;
  }
  function eventSamples(event) {
    try { const samples = typeof event.getCoalescedEvents === 'function' ? event.getCoalescedEvents() : null; return samples && samples.length ? Array.from(samples) : [event]; }
    catch (_) { return [event]; }
  }
  function beginStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor' || (event.pointerType === 'mouse' && event.button !== 0)) return;
    event.preventDefault(); event.stopPropagation(); resizeCanvases();
    state.drawing = true; state.pointerId = event.pointerId; state.snapGuide = null;
    try { inkCanvas.setPointerCapture(event.pointerId); } catch (_) {}
    const point = normalizedPoint(event);
    if (state.tool === 'laser') { clearLaser(); state.laserPoints=[point]; drawLaser(); return; }
    state.currentStroke = { tool:state.tool, settings:{...strokeSettings(state.tool)}, points:[point] };
    const context = inkCanvas.getContext('2d'); if (context) drawStroke(context,state.currentStroke,0);
  }
  function continueStroke(event) {
    updateEraserCursor(event);
    if (state.tool === 'cursor') return;
    if (!state.drawing) {
      if (state.tool === 'laser') { state.laserPoints=[normalizedPoint(event)]; drawLaser(); }
      return;
    }
    if (event.pointerId !== state.pointerId) return;
    event.preventDefault(); event.stopPropagation();
    const samples = eventSamples(event);
    if (state.tool === 'laser') { samples.forEach((sample)=>state.laserPoints.push(normalizedPoint(sample))); drawLaser(); return; }
    const stroke = state.currentStroke; if (!stroke) return;
    const oldLength = stroke.points.length; samples.forEach((sample)=>stroke.points.push(normalizedPoint(sample)));
    if (stroke.tool === 'highlighter' || stroke.tool === 'eraser' || stroke.tool === 'pen') redrawInk();
    else { const context=inkCanvas.getContext('2d'); if(context) drawStroke(context,stroke,Math.max(0,oldLength-1)); }
  }
  function finishStroke(event) {
    if (!state.drawing) return;
    if (event && state.pointerId != null && event.pointerId !== state.pointerId) return;
    if (event) { event.preventDefault(); event.stopPropagation(); try{inkCanvas.releasePointerCapture(event.pointerId);}catch(_){} }
    if (state.tool === 'laser') scheduleLaserFade();
    else if (state.currentStroke && state.currentStroke.points.length) {
      state.currentStroke.mvipUndoOrder = window.mvipDrawingHistory.stamp(surface);
      state.strokes.push(state.currentStroke);
    }
    state.currentStroke=null; state.drawing=false; state.pointerId=null; state.snapGuide=null;
  }
  function undoInk() {
    if (state.drawing) finishStroke();
    if (!state.strokes.length) return false;
    state.strokes.pop(); redrawInk(); return true;
  }
  function clearInk() {
    state.strokes=[]; state.currentStroke=null; state.drawing=false; state.pointerId=null; state.snapGuide=null; redrawInk(); clearLaser();
  }

  function capturePoint(event) {
    const rect = surface.getBoundingClientRect();
    return {
      x:clamp(Number(event.clientX) - rect.left, 0, state.workspaceWidth),
      y:clamp(Number(event.clientY) - rect.top, 0, state.workspaceHeight)
    };
  }
  function captureRect(start, end) {
    const left = Math.min(start.x, end.x);
    const top = Math.min(start.y, end.y);
    return {
      left, top,
      width:Math.abs(end.x - start.x),
      height:Math.abs(end.y - start.y)
    };
  }
  function paintCaptureSelection(rect) {
    captureSelection.style.left = `${rect.left}px`;
    captureSelection.style.top = `${rect.top}px`;
    captureSelection.style.width = `${rect.width}px`;
    captureSelection.style.height = `${rect.height}px`;
  }
  function announceCaptureMode(active) {
    try {
      document.dispatchEvent(new CustomEvent('mvip-whiteboard-capture-mode-change', {
        detail:{ active:!!active, source:'whiteboard' }
      }));
    } catch (_) {}
  }
  function setCaptureMode(active) {
    if (!active) {
      const pointerId = state.capture && state.capture.pointerId;
      if (pointerId != null) {
        try { captureOverlay.releasePointerCapture(pointerId); } catch (_) {}
      }
      state.capture = null;
      captureOverlay.classList.remove('is-active', 'is-selecting');
      captureBtn.setAttribute('aria-pressed', 'false');
      captureBtn.disabled = false;
      announceCaptureMode(false);
      return false;
    }
    if (state.drawing) finishStroke();
    state.capture = { selecting:false, pointerId:null, start:null, end:null };
    captureOverlay.classList.add('is-active');
    captureOverlay.classList.remove('is-selecting');
    captureBtn.classList.remove('is-capture-ready');
    captureBtn.setAttribute('aria-pressed', 'true');
    captureBtn.title = 'Kéo chuột trên bảng để chọn vùng cần chụp';
    announceCaptureMode(true);
    return true;
  }
  function drawCanvasCrop(targetContext, sourceCanvas, rect) {
    if (!(sourceCanvas instanceof HTMLCanvasElement) || !sourceCanvas.width || !sourceCanvas.height) return;
    const cssWidth = Math.max(1, parseFloat(sourceCanvas.style.width) || state.width || state.workspaceWidth);
    const cssHeight = Math.max(1, parseFloat(sourceCanvas.style.height) || state.height || state.workspaceHeight);
    const scaleX = sourceCanvas.width / cssWidth;
    const scaleY = sourceCanvas.height / cssHeight;
    targetContext.drawImage(
      sourceCanvas,
      rect.left * scaleX,
      rect.top * scaleY,
      rect.width * scaleX,
      rect.height * scaleY,
      0, 0, rect.width, rect.height
    );
  }
  function canvasBlob(canvas) {
    return new Promise((resolve) => {
      if (typeof canvas.toBlob === 'function') canvas.toBlob(resolve, 'image/png');
      else {
        try {
          const dataUrl = canvas.toDataURL('image/png');
          fetch(dataUrl).then((response) => response.blob()).then(resolve).catch(() => resolve(null));
        } catch (_) { resolve(null); }
      }
    });
  }
  function copyCaptureToSystemClipboard(blobPromise) {
    if (!navigator.clipboard || typeof navigator.clipboard.write !== 'function'
        || typeof ClipboardItem !== 'function') return Promise.resolve(false);
    try {
      /* Gọi clipboard.write ngay trong lượt pointerup để giữ quyền kích hoạt
         của người dùng; ClipboardItem nhận Promise và chờ PNG tạo xong. */
      return navigator.clipboard.write([new ClipboardItem({ 'image/png':blobPromise })])
        .then(() => true, () => false);
    } catch (_) { return Promise.resolve(false); }
  }
  async function publishCapturedRegion(rect) {
    const pixelBudgetScale = Math.sqrt(16000000 / Math.max(1, rect.width * rect.height));
    const scale = Math.max(.75, Math.min(2, Number(devicePixelRatio) || 1, pixelBudgetScale));
    const output = document.createElement('canvas');
    output.width = Math.max(1, Math.round(rect.width * scale));
    output.height = Math.max(1, Math.round(rect.height * scale));
    const context = output.getContext('2d');
    if (!context) return false;
    context.setTransform(scale, 0, 0, scale, 0, 0);
    context.fillStyle = '#ffffff';
    context.fillRect(0, 0, rect.width, rect.height);
    context.save();
    context.strokeStyle = 'rgba(100,116,139,.18)';
    context.lineWidth = 1;
    const spacing = 37.8;
    for (let y = Math.ceil(rect.top / spacing) * spacing - rect.top; y <= rect.height; y += spacing) {
      context.beginPath(); context.moveTo(0, y + .5); context.lineTo(rect.width, y + .5); context.stroke();
    }
    context.restore();
    drawCanvasCrop(context, inkCanvas, rect);
    const geometryCanvas = surface.querySelector('#mvipWhiteboardGeometryCanvas');
    if (geometryCanvas instanceof HTMLCanvasElement) drawCanvasCrop(context, geometryCanvas, rect);
    drawCanvasCrop(context, laserCanvas, rect);
    /* Ảnh Paste là phần tử DOM nên không nằm trong các canvas nét vẽ. Ghép
       riêng phần ảnh giao với vùng chọn để bản chụp bảng trắng đúng như nhìn thấy. */
    surface.querySelectorAll('.mvip-whiteboard-pasted-image-layer .mvip-left-temporary-paste-box').forEach((box) => {
      if (!(box instanceof HTMLElement)) return;
      const image = box.querySelector('img');
      if (!(image instanceof HTMLImageElement) || !image.complete || !image.naturalWidth || !image.naturalHeight) return;
      const left = Number.parseFloat(box.style.left) || 0;
      const top = Number.parseFloat(box.style.top) || 0;
      const width = Math.max(1, Number.parseFloat(box.style.width) || box.offsetWidth || 1);
      const height = Math.max(1, Number.parseFloat(box.style.height) || box.offsetHeight || 1);
      const cropLeft = Math.max(rect.left, left);
      const cropTop = Math.max(rect.top, top);
      const cropRight = Math.min(rect.left + rect.width, left + width);
      const cropBottom = Math.min(rect.top + rect.height, top + height);
      if (cropRight <= cropLeft || cropBottom <= cropTop) return;
      const cropWidth = cropRight - cropLeft;
      const cropHeight = cropBottom - cropTop;
      context.drawImage(
        image,
        (cropLeft - left) / width * image.naturalWidth,
        (cropTop - top) / height * image.naturalHeight,
        cropWidth / width * image.naturalWidth,
        cropHeight / height * image.naturalHeight,
        cropLeft - rect.left, cropTop - rect.top, cropWidth, cropHeight
      );
    });
    const blobPromise = canvasBlob(output);
    const clipboardPromise = copyCaptureToSystemClipboard(blobPromise);
    const blob = await blobPromise;
    if (!(blob instanceof Blob)) return false;
    const serial = ++state.captureSerial;
    const detail = {
      blob,
      width:output.width,
      height:output.height,
      cssWidth:rect.width,
      cssHeight:rect.height,
      serial
    };
    try { document.dispatchEvent(new CustomEvent('mvip-whiteboard-capture-ready', { detail })); } catch (_) {}
    const copied = await clipboardPromise;
    captureBtn.classList.add('is-capture-ready');
    captureBtn.title = copied
      ? 'Đã chụp và sao chép ảnh. Bấm lại để chụp vùng khác.'
      : 'Đã chụp ảnh vào bộ nhớ tạm. Bấm Paste ở màn hình trái.';
    window.setTimeout(() => captureBtn.classList.remove('is-capture-ready'), 1600);
    return true;
  }
  function beginCapture(event) {
    if (!state.capture || (event.pointerType === 'mouse' && event.button !== 0)) return;
    event.preventDefault(); event.stopImmediatePropagation();
    const point = capturePoint(event);
    state.capture.selecting = true;
    state.capture.pointerId = event.pointerId;
    state.capture.start = point;
    state.capture.end = point;
    captureOverlay.classList.add('is-selecting');
    paintCaptureSelection(captureRect(point, point));
    try { captureOverlay.setPointerCapture(event.pointerId); } catch (_) {}
  }
  function moveCapture(event) {
    if (!state.capture || !state.capture.selecting || event.pointerId !== state.capture.pointerId) return;
    event.preventDefault(); event.stopImmediatePropagation();
    state.capture.end = capturePoint(event);
    paintCaptureSelection(captureRect(state.capture.start, state.capture.end));
  }
  function finishCapture(event) {
    const capture = state.capture;
    if (!capture || !capture.selecting || (event && event.pointerId !== capture.pointerId)) return;
    if (event) { event.preventDefault(); event.stopImmediatePropagation(); }
    const end = event ? capturePoint(event) : capture.end;
    const rect = captureRect(capture.start, end);
    try { captureOverlay.releasePointerCapture(capture.pointerId); } catch (_) {}
    setCaptureMode(false);
    if (rect.width < 6 || rect.height < 6) return;
    captureBtn.disabled = true;
    captureBtn.title = 'Đang tạo ảnh vùng đã chọn…';
    publishCapturedRegion(rect).finally(() => { captureBtn.disabled = false; });
  }

  window.mvipDrawingHistory.register(surface, 'ink', {
    peek:() => Number(state.strokes[state.strokes.length - 1]?.mvipUndoOrder) || 0,
    undo:undoInk,
    finish:() => { if (state.drawing) finishStroke(); }
  });
  window.mvipWhiteboardInkTool = {
    tool(value){ return value == null ? state.tool : setTool(value); },
    color(value){
      const next=String(value == null ? '' : value);
      if (state.tool==='highlighter' && HIGHLIGHTER_COLORS.some((entry)=>entry.value===next)) {
        setSharedHighlighterColor(next);
      } else if (state.tool!=='highlighter' && COLORS.some((entry)=>entry.value===next)) {
        state.color=next; try{localStorage.setItem('mvip_whiteboard_color',state.color);}catch(_){} syncToolUi();
      }
      return activeColorValue();
    },
    eraserSize(value){
      const size=Number(value); if([16,26,38,52].includes(size)){state.eraserWidth=size;try{localStorage.setItem('mvip_whiteboard_eraser_size',String(size));}catch(_){} }
      return state.eraserWidth;
    },
    clear:clearInk, undo:() => window.mvipDrawingHistory.undo(surface), hasUndo:()=>state.strokes.length>0,
    activate:()=>setTool('pen'), deactivate:()=>setTool('cursor'), isActive:()=>state.tool!=='cursor'
  };
  window.mvipWhiteboardCaptureTool = {
    start:()=>setCaptureMode(true),
    cancel:()=>setCaptureMode(false),
    isActive:()=>!!state.capture,
    grow:()=>setWorkspaceSize(state.workspaceWidth + 1200, state.workspaceHeight + 900),
    size:()=>({ width:state.workspaceWidth, height:state.workspaceHeight })
  };

  TOOL_DEFS.forEach((entry) => {
    const button=toolButtons.get(entry.id); if(!button) return;
    button.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();setTool(entry.id);});
  });
  function activeColorEntries(){ return state.tool==='highlighter' ? HIGHLIGHTER_COLORS : COLORS; }
  function activeColorValue(){ return state.tool==='highlighter' ? state.highlighterColor : state.color; }
  function setSharedHighlighterColor(value,broadcast=true){
    const next=String(value||'');
    if(!HIGHLIGHTER_COLORS.some((entry)=>entry.value===next)) return false;
    state.highlighterColor=next;
    try{localStorage.setItem('mvip_highlighter_color',next);}catch(_){}
    syncToolUi(); updateColorChoices();
    if(broadcast) document.dispatchEvent(new CustomEvent('mvip-highlighter-color-change',{detail:{value:next}}));
    return true;
  }
  document.addEventListener('mvip-highlighter-color-change',(event)=>{
    setSharedHighlighterColor(event&&event.detail&&event.detail.value,false);
  });
  function buildColorChoices(){
    colorMenu.replaceChildren();
    activeColorEntries().forEach((entry) => {
      const choice=document.createElement('button'); choice.type='button'; choice.className='mvip-whiteboard-color-choice';
      choice.setAttribute('role','menuitemradio'); choice.setAttribute('aria-label',entry.name); choice.setAttribute('data-whiteboard-color',entry.value); choice.style.background=entry.value;
      choice.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();window.mvipWhiteboardInkTool.color(entry.value);colorMenu.hidden=true;colorBtn.setAttribute('aria-expanded','false');updateColorChoices();});
      colorMenu.appendChild(choice);
    });
  }
  function updateColorChoices(){
    colorSwatch.style.setProperty('--mvip-whiteboard-color',activeColorValue());
    colorMenu.querySelectorAll('[data-whiteboard-color]').forEach((node)=>node.setAttribute('aria-checked',node.getAttribute('data-whiteboard-color')===activeColorValue()?'true':'false'));
  }
  buildColorChoices();
  updateColorChoices();
  colorBtn.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();buildColorChoices();colorMenu.hidden=!colorMenu.hidden;colorBtn.setAttribute('aria-expanded',colorMenu.hidden?'false':'true');updateColorChoices();});

  inkCanvas.addEventListener('pointerdown',beginStroke);
  inkCanvas.addEventListener('pointermove',continueStroke);
  inkCanvas.addEventListener('pointerup',finishStroke);
  inkCanvas.addEventListener('pointercancel',finishStroke);
  inkCanvas.addEventListener('lostpointercapture',()=>finishStroke());
  inkCanvas.addEventListener('pointerleave',()=>{eraserCursor.classList.remove('is-visible');if(state.tool==='laser'&&!state.drawing)scheduleLaserFade();});
  captureOverlay.addEventListener('pointerdown', beginCapture);
  captureOverlay.addEventListener('pointermove', moveCapture);
  captureOverlay.addEventListener('pointerup', finishCapture);
  captureOverlay.addEventListener('pointercancel', finishCapture);
  captureOverlay.addEventListener('lostpointercapture', () => finishCapture());
  viewport.addEventListener('scroll',()=>{if(!panel.hidden)rememberViewportPosition();scheduleWorkspaceGrowth();},{passive:true});
  panel.addEventListener('mvip-geometry-drawing-action', scheduleWorkspaceGrowth);

  const openButtons=[];
  function createOpenButton(id){
    const button=document.createElement('button');button.type='button';button.id=id;button.className='mvip-whiteboard-open-btn';
    button.setAttribute('aria-label','Mở bảng trắng');button.setAttribute('aria-pressed','false');button.title='Bảng trắng';button.innerHTML=ICONS.open;openButtons.push(button);return button;
  }
  const singleResult=document.getElementById('singleExamViewBtn');
  if(singleResult&&singleResult.parentElement)singleResult.insertAdjacentElement('afterend',createOpenButton('singleExamWhiteboardBtn'));
  const wordActions=document.querySelector('#wordPresentationPresenter .word-presentation-actions');
  const wordScanTools=document.getElementById('wordPresentationScanTools');
  if(wordActions){const wordButton=createOpenButton('wordPresentationWhiteboardBtn');if(wordScanTools&&wordScanTools.parentElement===wordActions)wordScanTools.insertAdjacentElement('afterend',wordButton);else wordActions.insertBefore(wordButton,wordActions.firstChild);}

  function currentFullscreenHost(){const full=document.fullscreenElement||document.webkitFullscreenElement||null;return full instanceof HTMLElement?full:document.body;}
  function mountPanel(){
    const host=currentFullscreenHost();
    if(panel.parentElement!==host){if(!panel.hidden)rememberViewportPosition();host.appendChild(panel);requestAnimationFrame(restoreViewportPosition);}
  }
  function syncOpenButtons(open){openButtons.forEach((button)=>button.setAttribute('aria-pressed',open?'true':'false'));}
  function setFullMode(){
    panel.classList.remove('is-half','is-dragging','is-resizing');
    state.drag=null;state.resize=null;
    panel.style.left='';panel.style.top='';panel.style.right='';panel.style.bottom='';panel.style.width='';panel.style.height='';
    sizeBtn.innerHTML=ICONS.shrink;sizeBtn.title='Thu nhỏ bảng trắng về góc dưới bên phải';sizeBtn.setAttribute('aria-label','Thu nhỏ bảng trắng về góc dưới bên phải');
    requestAnimationFrame(()=>{ensureWorkspaceSize();scheduleResize();window.dispatchEvent(new Event('resize'));});
  }
  function clampHalfPosition(){
    if(!panel.classList.contains('is-half'))return;
    let rect=panel.getBoundingClientRect();
    const maxWidth=Math.max(1,window.innerWidth-16);const maxHeight=Math.max(1,window.innerHeight-16);
    if(rect.width>maxWidth){panel.style.width=`${maxWidth}px`;rect=panel.getBoundingClientRect();}
    if(rect.height>maxHeight){panel.style.height=`${maxHeight}px`;rect=panel.getBoundingClientRect();}
    const left=clamp(rect.left,8,Math.max(8,window.innerWidth-rect.width-8));
    const top=clamp(rect.top,8,Math.max(8,window.innerHeight-rect.height-8));
    panel.style.left=`${left}px`;panel.style.top=`${top}px`;
  }
  function setHalfMode(){
    panel.classList.add('is-half');
    const width=Math.min(window.innerWidth-16,Math.max(420,Math.round(window.innerWidth*.5)));
    const height=Math.min(window.innerHeight-16,Math.max(300,Math.round(window.innerHeight*.5)));
    panel.style.width=`${width}px`;panel.style.height=`${height}px`;panel.style.right='auto';panel.style.bottom='auto';
    panel.style.left=`${Math.max(8,window.innerWidth-width-12)}px`;panel.style.top=`${Math.max(8,window.innerHeight-height-12)}px`;
    sizeBtn.innerHTML=ICONS.expand;sizeBtn.title='Phóng bảng trắng toàn màn hình';sizeBtn.setAttribute('aria-label','Phóng bảng trắng toàn màn hình');
    requestAnimationFrame(()=>{ensureWorkspaceSize();scheduleResize();window.dispatchEvent(new Event('resize'));});
  }
  function toggleSize(){panel.classList.contains('is-half')?setFullMode():setHalfMode();}
  function openBoard(){
    mountPanel();setHalfMode();panel.hidden=false;document.body.classList.add('mvip-whiteboard-open');syncOpenButtons(true);setTool('cursor');
    requestAnimationFrame(()=>{try{window.mvipWhiteboardGeometryTool&&window.mvipWhiteboardGeometryTool.tool('');}catch(_){}ensureWorkspaceSize();restoreViewportPosition();scheduleResize();window.dispatchEvent(new Event('resize'));});
  }
  function closeBoard(){
    rememberViewportPosition();setCaptureMode(false);panel.hidden=true;document.body.classList.remove('mvip-whiteboard-open');syncOpenButtons(false);colorMenu.hidden=true;colorBtn.setAttribute('aria-expanded','false');setTool('cursor');
    if(panel.parentElement!==document.body)document.body.appendChild(panel);
  }
  window.mvipWhiteboardViewportMemory={remember:rememberViewportPosition,restore:restoreViewportPosition,position:()=>({left:state.viewportScroll.left,top:state.viewportScroll.top})};
  openButtons.forEach((button)=>button.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();panel.hidden?openBoard():closeBoard();}));
  /* Không để cú bấm Đóng tiếp tục nổi lên presenter và bị hiểu nhầm là bấm
     vào ảnh nằm phía dưới bảng trắng. */
  closeBtn.addEventListener('pointerdown',(event)=>{event.stopPropagation();});
  closeBtn.addEventListener('click',(event)=>{
    event.preventDefault();
    event.stopPropagation();
    closeBoard();
  });
  panel.addEventListener('click',(event)=>{event.stopPropagation();});
  sizeBtn.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();toggleSize();});
  captureBtn.addEventListener('click',(event)=>{
    event.preventDefault();event.stopPropagation();
    state.capture ? setCaptureMode(false) : setCaptureMode(true);
  });
  undoBtn.addEventListener('click',(event)=>{
    event.preventDefault();event.stopPropagation();
    window.mvipDrawingHistory.undo(surface);
  });
  clearBtn.addEventListener('click',(event)=>{event.preventDefault();event.stopPropagation();clearInk();try{window.mvipWhiteboardGeometryTool&&window.mvipWhiteboardGeometryTool.clear(false);}catch(_){} });

  dragHandle.addEventListener('pointerdown',(event)=>{
    if(!panel.classList.contains('is-half')||(event.pointerType==='mouse'&&event.button!==0))return;
    event.preventDefault();event.stopPropagation();const rect=panel.getBoundingClientRect();
    state.drag={pointerId:event.pointerId,startX:event.clientX,startY:event.clientY,left:rect.left,top:rect.top};panel.classList.add('is-dragging');
    try{dragHandle.setPointerCapture(event.pointerId);}catch(_){}
  });
  dragHandle.addEventListener('pointermove',(event)=>{
    const drag=state.drag;if(!drag||event.pointerId!==drag.pointerId)return;event.preventDefault();
    const rect=panel.getBoundingClientRect();const left=clamp(drag.left+event.clientX-drag.startX,8,Math.max(8,window.innerWidth-rect.width-8));
    const top=clamp(drag.top+event.clientY-drag.startY,8,Math.max(8,window.innerHeight-rect.height-8));
    panel.style.left=`${left}px`;panel.style.top=`${top}px`;
  });
  function finishDrag(event){const drag=state.drag;if(!drag||(event&&event.pointerId!==drag.pointerId))return;try{dragHandle.releasePointerCapture(drag.pointerId);}catch(_){}state.drag=null;panel.classList.remove('is-dragging');}
  dragHandle.addEventListener('pointerup',finishDrag);dragHandle.addEventListener('pointercancel',finishDrag);dragHandle.addEventListener('lostpointercapture',()=>finishDrag());

  resizeHandle.addEventListener('pointerdown',(event)=>{
    if(!panel.classList.contains('is-half')||(event.pointerType==='mouse'&&event.button!==0))return;
    event.preventDefault();event.stopPropagation();const rect=panel.getBoundingClientRect();
    state.resize={pointerId:event.pointerId,startX:event.clientX,startY:event.clientY,width:rect.width,height:rect.height,left:rect.left,top:rect.top};
    panel.classList.add('is-resizing');
    try{resizeHandle.setPointerCapture(event.pointerId);}catch(_){}
  });
  resizeHandle.addEventListener('pointermove',(event)=>{
    const resize=state.resize;if(!resize||event.pointerId!==resize.pointerId)return;event.preventDefault();
    const minWidth=Math.min(420,Math.max(1,window.innerWidth-16));
    const minHeight=Math.min(300,Math.max(1,window.innerHeight-16));
    const maxWidth=Math.max(minWidth,window.innerWidth-resize.left-8);
    const maxHeight=Math.max(minHeight,window.innerHeight-resize.top-8);
    panel.style.width=`${clamp(resize.width+event.clientX-resize.startX,minWidth,maxWidth)}px`;
    panel.style.height=`${clamp(resize.height+event.clientY-resize.startY,minHeight,maxHeight)}px`;
    scheduleResize();
  });
  function finishResize(event){
    const resize=state.resize;if(!resize||(event&&event.pointerId!==resize.pointerId))return;
    try{resizeHandle.releasePointerCapture(resize.pointerId);}catch(_){}
    state.resize=null;panel.classList.remove('is-resizing');clampHalfPosition();scheduleResize();window.dispatchEvent(new Event('resize'));
  }
  resizeHandle.addEventListener('pointerup',finishResize);resizeHandle.addEventListener('pointercancel',finishResize);resizeHandle.addEventListener('lostpointercapture',()=>finishResize());

  document.addEventListener('pointerdown',(event)=>{if(!colorMenu.hidden&&event.target instanceof Node&&!colorBtn.contains(event.target)&&!colorMenu.contains(event.target)){colorMenu.hidden=true;colorBtn.setAttribute('aria-expanded','false');}},true);
  document.addEventListener('keydown',(event)=>{
    if(event.key!=='Escape'||panel.hidden)return;
    event.preventDefault();
    if(state.capture){setCaptureMode(false);return;}
    closeBoard();
  });
  document.addEventListener('fullscreenchange',()=>{if(!panel.hidden)requestAnimationFrame(()=>{mountPanel();clampHalfPosition();scheduleResize();});});
  document.addEventListener('webkitfullscreenchange',()=>{if(!panel.hidden)requestAnimationFrame(()=>{mountPanel();clampHalfPosition();scheduleResize();});});
  window.addEventListener('resize',()=>{clampHalfPosition();ensureWorkspaceSize();scheduleResize();});
  if(typeof ResizeObserver==='function'){
    const observer=new ResizeObserver(()=>{ensureWorkspaceSize();scheduleResize();});
    observer.observe(surface);observer.observe(viewport);
  }
  ['singleExamCloseBtn','wordPresentationCloseBtn'].forEach((id)=>{const button=document.getElementById(id);if(button)button.addEventListener('click',()=>{if(!panel.hidden)closeBoard();});});

  ensureWorkspaceSize();syncToolUi();resizeCanvases();
})();
</script>

<style id="mvip-whiteboard-split-screen-style-20260825">
  .mvip-whiteboard-split-btn {
    min-width:max-content; height:36px; min-height:36px; padding:0 10px;
    display:inline-flex; align-items:center; justify-content:center; gap:6px; flex:0 0 auto;
    border:2px solid #2563eb !important; border-radius:11px; background:#fff !important;
    color:#1d4ed8 !important; box-shadow:0 4px 12px rgba(15,23,42,.10); cursor:pointer;
    font:900 12px/1 Arial,Helvetica,sans-serif; white-space:nowrap;
  }
  .mvip-whiteboard-split-btn:hover { background:#eff6ff !important; border-color:#1d4ed8 !important; }
  .mvip-whiteboard-split-btn[aria-pressed="true"] {
    border-color:#1d4ed8 !important; background:#1d4ed8 !important; color:#fff !important;
    box-shadow:0 0 0 3px rgba(37,99,235,.18);
  }
  .mvip-whiteboard-split-btn svg { width:20px; height:20px; pointer-events:none; flex:0 0 auto; }
  .mvip-whiteboard-split-btn span { pointer-events:none; }

  /* Presenter vẫn là phần tử toàn màn hình để Fullscreen API hoạt động ổn định;
     chỉ các vùng giao diện bên trong được giới hạn vào đúng nửa bên trái. */
  body.mvip-whiteboard-split-open .word-presentation-presenter.mvip-whiteboard-split,
  body.mvip-whiteboard-split-open .single-exam-presenter.mvip-whiteboard-split {
    left:0 !important; top:0 !important; right:0 !important; bottom:0 !important;
    width:100vw !important; height:100vh !important; z-index:99999 !important;
    border-radius:0 !important; box-shadow:none !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-toolbar,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-access-banner,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-viewport,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-body,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-ad-strip {
    width:var(--mvip-whiteboard-split-left, 50vw) !important;
    max-width:var(--mvip-whiteboard-split-left, 50vw) !important;
    box-sizing:border-box !important; align-self:flex-start !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-viewport,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-body {
    flex:1 1 auto !important; min-width:0 !important; min-height:0 !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .cv7991-side-ink-dock.mvip-split-horizontal-ink-dock,
  .single-exam-presenter.mvip-whiteboard-split .cv7991-side-ink-dock.mvip-split-horizontal-ink-dock {
    position:relative !important; left:auto !important; right:auto !important; top:auto !important; bottom:auto !important;
    z-index:240 !important; width:var(--mvip-whiteboard-split-left, 50vw) !important;
    min-width:0 !important; max-width:var(--mvip-whiteboard-split-left, 50vw) !important;
    min-height:48px !important; height:auto !important; box-sizing:border-box !important;
    flex:0 0 auto !important; align-self:flex-start !important; flex-direction:row !important;
    flex-wrap:wrap !important; align-items:center !important; justify-content:flex-start !important;
    gap:5px !important; padding:5px 7px !important; border-width:0 0 1px 0 !important;
    border-radius:0 !important; background:#fff !important; box-shadow:0 4px 12px rgba(15,23,42,.12) !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-tool,
  .word-presentation-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-config,
  .single-exam-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-tool,
  .single-exam-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-config {
    width:36px !important; min-width:36px !important; height:36px !important; min-height:36px !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-popover,
  .single-exam-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-side-ink-popover {
    top:calc(100% + 6px) !important; left:7px !important; right:auto !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-geometry-menu,
  .single-exam-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock .cv7991-geometry-menu {
    top:calc(100% + 6px) !important; left:50% !important; right:auto !important;
    transform:translateX(-50%) !important; width:min(330px, calc(50vw - 24px)) !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-question-picker-modal,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-answer-modal,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-image-zoom-modal,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-guide-modal {
    right:auto !important; width:var(--mvip-whiteboard-split-left, 50vw) !important;
    max-width:var(--mvip-whiteboard-split-left, 50vw) !important;
  }

  /* Thu gọn thanh công cụ bên trái thành một hàng cuộn ngang để không che
     nội dung trình chiếu khi chiều rộng chỉ còn một nửa. */
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-toolbar,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar {
    min-height:48px !important; padding:5px 7px !important; gap:5px !important;
    flex-wrap:nowrap !important; overflow:hidden !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-title,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-title { display:none !important; }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions {
    width:100% !important; min-width:0 !important; flex:1 1 auto !important;
    flex-wrap:nowrap !important; justify-content:flex-start !important;
    overflow-x:auto !important; overflow-y:hidden !important; gap:5px !important;
    padding:1px 1px 3px !important; scrollbar-width:thin;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-toolbar button,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar button {
    min-height:32px !important; height:32px !important; padding:0 8px !important;
    border-radius:9px !important; font-size:12px !important; flex:0 0 auto !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .mvip-whiteboard-split-btn span,
  .single-exam-presenter.mvip-whiteboard-split .mvip-whiteboard-split-btn span { display:none; }

  /* Trong nửa trái giữ nút chia đôi, vòng quay, hai nút chuyển câu và bộ viết/vẽ.
     Bảng trắng cùng Đáp án được chuyển sang đầu màn hình phải; ra khỏi chia
     đôi, toàn bộ thành phần trở lại vị trí và trạng thái hiển thị ban đầu. */
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > *,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > * {
    display:none !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #wordPresentationWhiteboardSplitBtn,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #cv7991MagicWheelBtn,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #wordPresentationPrevBtn,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #wordPresentationNextBtn,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #wordPresentationSplitCaptureBtn,
  .word-presentation-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock > #wordPresentationSplitCaptureBtn,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > #wordPresentationPasteCaptureBtn[data-mvip-capture-ready="true"],
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #singleExamWhiteboardSplitBtn,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #cv7991SingleMagicWheelBtn,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #regularTestPrevBtn,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #regularTestNextBtn,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #singleExamSplitCaptureBtn,
  .single-exam-presenter.mvip-whiteboard-split .mvip-split-horizontal-ink-dock > #singleExamSplitCaptureBtn,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > #singleExamPasteCaptureBtn[data-mvip-capture-ready="true"] {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationWhiteboardBtn,
  .single-exam-presenter.mvip-whiteboard-split #singleExamWhiteboardBtn { order:10; }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationWhiteboardSplitBtn,
  .single-exam-presenter.mvip-whiteboard-split #singleExamWhiteboardSplitBtn { order:20; }
  .word-presentation-presenter.mvip-whiteboard-split #cv7991MagicWheelBtn,
  .single-exam-presenter.mvip-whiteboard-split #cv7991SingleMagicWheelBtn,
  #mvipPowerPointSplitLeftToolStrip [data-mvip-powerpoint-proxy-for="cv7991MagicWheelBtn"] {
    order:25 !important;
    width:34px !important; min-width:34px !important; padding:0 !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationAnswerBtn,
  .single-exam-presenter.mvip-whiteboard-split #singleExamAnswerBtn { order:30; }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationPrevBtn,
  .single-exam-presenter.mvip-whiteboard-split #regularTestPrevBtn { order:40; }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationNextBtn,
  .single-exam-presenter.mvip-whiteboard-split #regularTestNextBtn { order:50; }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationPasteCaptureBtn,
  .single-exam-presenter.mvip-whiteboard-split #singleExamPasteCaptureBtn {
    order:55; width:auto !important; min-width:52px !important; padding:0 8px !important;
    border-color:#16a34a !important; background:#f0fdf4 !important; color:#15803d !important;
    font-weight:900 !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationSplitCaptureBtn,
  .single-exam-presenter.mvip-whiteboard-split #singleExamSplitCaptureBtn {
    order:100; width:34px !important; min-width:34px !important; padding:0 !important;
    border-color:#2563eb !important; color:#1d4ed8 !important; background:#eff6ff !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split #wordPresentationSplitCaptureBtn[aria-pressed="true"],
  .single-exam-presenter.mvip-whiteboard-split #singleExamSplitCaptureBtn[aria-pressed="true"] {
    background:#1d4ed8 !important; color:#fff !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-toolbar,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions {
    overflow:visible !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > .mvip-split-horizontal-ink-dock,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > .mvip-split-horizontal-ink-dock {
    order:60; display:flex !important; position:relative !important;
    width:auto !important; min-width:max-content !important; max-width:none !important;
    min-height:34px !important; height:34px !important; padding:0 !important;
    flex:0 0 auto !important; flex-wrap:nowrap !important; gap:4px !important;
    border:0 !important; border-radius:0 !important; background:transparent !important;
    box-shadow:none !important; backdrop-filter:none !important; -webkit-backdrop-filter:none !important;
  }
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > .mvip-split-horizontal-ink-dock .cv7991-side-ink-tool,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-actions > .mvip-split-horizontal-ink-dock .cv7991-side-ink-config,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > .mvip-split-horizontal-ink-dock .cv7991-side-ink-tool,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-toolbar-actions > .mvip-split-horizontal-ink-dock .cv7991-side-ink-config {
    width:32px !important; min-width:32px !important; height:32px !important; min-height:32px !important;
    border-radius:8px !important;
  }

  /* Khi chia đôi, chỉ dành nửa trái cho nội dung câu hỏi; tạm ẩn phần quảng
     cáo/bảng quét cũ để không tạo thêm một cột thứ ba. */
  body.mvip-whiteboard-split-open.word-presentation-scan-split #dang-nhap,
  body.mvip-whiteboard-split-open.word-presentation-scan-split #bang-dieu-khien .current-board,
  body.mvip-whiteboard-split-open .single-exam-presenter.mvip-whiteboard-split .single-exam-side-stack,
  body.mvip-whiteboard-split-open .single-exam-presenter.mvip-whiteboard-split .single-exam-ad-strip {
    display:none !important;
  }
  body.mvip-whiteboard-split-open .single-exam-presenter.mvip-whiteboard-split .single-exam-body {
    display:flex !important; grid-template-columns:none !important; padding:0 !important; gap:0 !important;
  }
  body.mvip-whiteboard-split-open .single-exam-presenter.mvip-whiteboard-split .single-exam-slide {
    flex:1 1 auto !important; width:100% !important; max-width:100% !important;
    height:auto !important; min-width:0 !important; min-height:0 !important; border-radius:0 !important;
  }
  body.mvip-whiteboard-split-open .word-presentation-presenter.mvip-whiteboard-split .word-presentation-viewport {
    background:#fff !important;
  }

  #mvipWhiteboardPanel.is-split {
    position:fixed !important; inset:auto; min-width:0 !important; min-height:0 !important;
    max-width:none !important; max-height:none !important; box-sizing:border-box !important;
    border:0 !important; border-left:3px solid #2563eb !important; border-radius:0 !important;
    box-shadow:-10px 0 26px rgba(15,23,42,.20) !important; overflow:visible !important;
  }
  #mvipWhiteboardPanel.is-split.is-board-fullscreen {
    border-left:0 !important; box-shadow:none !important;
  }
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-head {
    min-height:48px; padding:5px 6px; gap:4px; align-items:flex-start;
    flex-wrap:wrap;
    border-radius:0; box-shadow:0 3px 10px rgba(15,23,42,.08);
  }
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-title { display:none; cursor:default; }
  #mvipWhiteboardSplitModeControls { display:none; }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardSplitModeControls {
    display:flex; align-items:center; justify-content:flex-start; gap:4px;
    flex:0 0 auto; order:0;
  }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardSplitModeControls > button {
    width:auto !important; min-width:max-content !important;
    height:34px !important; min-height:34px !important;
    display:inline-flex !important; align-items:center !important; justify-content:center !important;
    gap:5px !important; padding:0 9px !important; box-sizing:border-box !important;
    border:1px solid #cbd5e1 !important; border-radius:9px !important;
    background:#fff !important; color:#334155 !important;
    font:900 12px/1 Arial,Helvetica,sans-serif !important;
    box-shadow:0 1px 3px rgba(15,23,42,.08) !important;
  }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardSplitModeControls > .mvip-whiteboard-open-btn::after {
    content:"Bảng trắng";
  }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardSplitModeControls > button.is-split-pane-active,
  #mvipWhiteboardPanel.is-split #mvipWhiteboardSplitModeControls > button[aria-selected="true"] {
    border-color:#2563eb !important; background:#2563eb !important; color:#fff !important;
    box-shadow:0 0 0 2px rgba(37,99,235,.16) !important;
  }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardToolDock {
    width:auto; min-width:0; justify-content:flex-start; gap:4px; flex-wrap:wrap;
    flex:1 1 420px; order:10;
  }
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-tool-btn,
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-action-btn,
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-color-btn {
    width:34px; min-width:34px; height:34px; min-height:34px;
  }
  #mvipWhiteboardPanel.is-split #mvipWhiteboardCloseBtn { width:auto; min-width:54px; }
  #mvipWhiteboardPanel[data-split-content="answer"] #mvipWhiteboardViewport { overflow:hidden !important; }
  #mvipWhiteboardPanel[data-split-content="answer"] #mvipWhiteboardCaptureBtn { display:none !important; }
  #mvipWhiteboardPanel[data-split-content="answer"] #mvipWhiteboardPasteBtn { display:none !important; }
  #mvipWhiteboardPasteBtn {
    width:auto !important; min-width:52px !important; padding:0 8px !important;
    border-color:#16a34a !important; background:#f0fdf4 !important; color:#15803d !important;
    font-weight:900 !important;
  }
  .mvip-whiteboard-open-btn.is-split-pane-active,
  .word-presentation-presenter.mvip-whiteboard-split .word-presentation-answer-btn.is-split-pane-active,
  .single-exam-presenter.mvip-whiteboard-split .single-exam-answer-btn.is-split-pane-active {
    border-color:#1d4ed8 !important; background:#1d4ed8 !important; color:#fff !important;
    box-shadow:0 0 0 3px rgba(37,99,235,.16) !important;
  }
  #mvipWhiteboardPanel.is-split .mvip-whiteboard-geometry-menu {
    width:min(330px, calc(50vw - 24px)) !important;
  }
  /* Ảnh phóng to được chuyển vào panel bên phải bằng JS. Modal và hộp ảnh chỉ
     dùng kích thước của panel này, không phủ ngược sang phần trình chiếu trái. */
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal {
    position:absolute !important; inset:0 !important; z-index:520 !important;
    width:100% !important; height:100% !important; max-width:100% !important; max-height:100% !important;
    box-sizing:border-box !important; padding:6px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-dialog {
    width:calc(100% - 4px) !important; height:calc(100% - 4px) !important;
    max-width:calc(100% - 4px) !important; max-height:calc(100% - 4px) !important;
    border-radius:12px !important;
  }
  /* Trong nửa màn hình phải: hàng đầu chỉ giữ tiêu đề và nút Đóng; toàn bộ
     công cụ viết/vẽ được dành riêng hàng thứ hai để không bị tràn mất nút. */
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-head {
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) auto !important;
    grid-template-areas:"zoom-title zoom-close" "zoom-tools zoom-tools" !important;
    align-items:center !important;
    justify-content:stretch !important;
    gap:5px 8px !important;
    min-height:0 !important;
    padding:6px 7px !important;
    box-sizing:border-box !important;
    overflow:visible !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-head > strong {
    grid-area:zoom-title !important;
    width:auto !important; max-width:100% !important; min-width:0 !important;
    font-size:14px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-close {
    grid-area:zoom-close !important;
    justify-self:end !important;
    min-height:30px !important; height:30px !important;
    padding:0 10px !important; font-size:12px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-image-zoom-ink-tools {
    grid-area:zoom-tools !important;
    width:100% !important; max-width:100% !important; min-width:0 !important;
    display:flex !important; flex:0 0 auto !important;
    flex-wrap:wrap !important; align-items:center !important; justify-content:flex-start !important;
    gap:4px !important; box-sizing:border-box !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-image-zoom-ink-tool-btn,
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-image-zoom-ink-config-btn {
    width:32px !important; min-width:32px !important;
    height:32px !important; min-height:32px !important;
    padding:0 !important; gap:0 !important; border-radius:8px !important;
    flex:0 0 32px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-image-zoom-ink-tool-btn span {
    display:none !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-image-zoom-ink-tool-btn svg {
    width:17px !important; height:17px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-body {
    min-width:0 !important; min-height:0 !important; padding:8px !important;
  }
  #mvipWhiteboardPanel.is-split > #wordPresentationImageZoomModal .word-presentation-image-zoom-content {
    max-width:100% !important; max-height:100% !important;
  }
  #mvipWhiteboardSplitAnswerLayer[hidden] { display:none !important; }
  #mvipWhiteboardSplitAnswerLayer {
    position:absolute; inset:0; z-index:1; box-sizing:border-box; overflow:auto;
    padding:14px; background:#eef2f7; color:#0f172a; pointer-events:auto;
    overscroll-behavior:contain; scrollbar-gutter:stable;
  }
  .mvip-whiteboard-split-answer-card {
    width:100%; min-height:100%; box-sizing:border-box; padding:18px 20px 24px;
    border:1px solid #cbd5e1; border-radius:14px; background:#fff;
    box-shadow:0 8px 24px rgba(15,23,42,.12); overflow:visible;
  }
  .mvip-whiteboard-split-answer-title {
    margin:0 0 14px; padding:0 0 10px; border-bottom:1px solid #dbe4f0;
    color:#2563eb; font:900 18px/1.2 Arial,Helvetica,sans-serif;
  }
  .mvip-whiteboard-split-answer-body { min-width:0; font-weight:400 !important; }
  .mvip-whiteboard-split-solution-empty {
    min-height:calc(100vh - 180px); display:flex; align-items:center; justify-content:center;
    padding:24px; box-sizing:border-box; color:#64748b; text-align:center;
    font:700 clamp(28px, 2.5vw, 42px)/1.35 Arial,Helvetica,sans-serif;
  }
  .mvip-whiteboard-split-answer-body *,
  .mvip-whiteboard-split-answer-body strong,
  .mvip-whiteboard-split-answer-body b { font-weight:400 !important; }
  .mvip-whiteboard-split-answer-body > .word-presentation-answer-content {
    padding:0 !important; font-size:clamp(28px, 2.35vw, 42px) !important; line-height:1.4 !important;
  }
  .mvip-whiteboard-split-answer-body > .single-exam-guide-text {
    padding:0 !important; font-size:clamp(28px, 2.35vw, 42px) !important; line-height:1.4 !important;
  }
  .mvip-whiteboard-split-answer-body > .single-exam-guide-text p { margin:.25em 0 .55em !important; }
  .mvip-whiteboard-split-answer-body > .word-presentation-card {
    width:100% !important; max-width:100% !important; min-height:0 !important; margin:0 !important;
    padding:16px 18px 20px !important; border-radius:10px !important; transform:none !important;
    box-shadow:none !important; font-size:clamp(25px, 2.15vw, 38px) !important; line-height:1.35 !important;
  }
  .mvip-whiteboard-split-answer-body > .single-exam-slide {
    position:relative !important; width:100% !important; max-width:100% !important; min-height:calc(100vh - 150px) !important;
    height:auto !important; margin:0 !important; padding:16px !important; border-radius:10px !important;
    box-sizing:border-box !important; overflow:visible !important;
  }
  .mvip-whiteboard-split-answer-body table,
  .mvip-whiteboard-split-answer-body table * { font-size:inherit !important; }
  .mvip-whiteboard-split-answer-body img,
  .mvip-whiteboard-split-answer-body svg,
  .mvip-whiteboard-split-answer-body canvas { max-width:100% !important; }
  .mvip-left-temporary-paste-layer {
    position:absolute; inset:0; box-sizing:border-box; pointer-events:none; overflow:hidden;
  }
  #wordPresentationViewport > .mvip-left-temporary-paste-layer { z-index:70; }
  #singleExamSlide > .mvip-left-temporary-paste-layer { z-index:90; }
  .mvip-left-temporary-paste-box {
    position:absolute; left:0; top:0; box-sizing:border-box; pointer-events:auto;
    cursor:move; touch-action:none; user-select:none; -webkit-user-select:none;
    border:2px solid #2563eb; border-radius:8px; background:#fff;
    box-shadow:0 12px 34px rgba(15,23,42,.30);
  }
  .mvip-left-temporary-paste-box.is-moving { cursor:grabbing; box-shadow:0 16px 42px rgba(15,23,42,.38); }
  .mvip-left-temporary-paste-box.is-resizing { box-shadow:0 0 0 3px rgba(37,99,235,.20), 0 16px 42px rgba(15,23,42,.38); }
  .mvip-left-temporary-paste-box img {
    display:block; width:100%; height:100%; max-width:none !important; max-height:none !important;
    object-fit:fill; border:0; border-radius:6px; background:#fff; pointer-events:none;
  }
  .mvip-left-paste-resize-handle {
    position:absolute; right:-9px; bottom:-9px; width:22px; height:22px; padding:0;
    display:flex; align-items:center; justify-content:center; box-sizing:border-box;
    border:2px solid #fff; border-radius:50%; background:#2563eb; color:#fff;
    box-shadow:0 2px 8px rgba(15,23,42,.35); cursor:nwse-resize; pointer-events:auto;
  }
  .mvip-left-paste-resize-handle::before {
    content:""; width:8px; height:8px; border-right:2px solid currentColor; border-bottom:2px solid currentColor;
  }
  .mvip-pasted-image-close {
    position:absolute; right:-10px; top:-10px; z-index:4; width:23px; height:23px; padding:0;
    display:flex; align-items:center; justify-content:center; box-sizing:border-box;
    border:2px solid #fff; border-radius:50%; background:#111827; color:#fff;
    font:900 15px/1 Arial,Helvetica,sans-serif; box-shadow:0 2px 8px rgba(15,23,42,.38);
    cursor:pointer; pointer-events:auto;
  }
  .mvip-pasted-image-close:hover { background:#dc2626; }
  .mvip-whiteboard-pasted-image-layer {
    position:absolute; inset:0; z-index:25; box-sizing:border-box; pointer-events:none; overflow:visible;
  }
  .mvip-split-left-capture-overlay {
    position:absolute; inset:0; z-index:140; display:none; pointer-events:none;
    cursor:crosshair; touch-action:none; user-select:none; -webkit-user-select:none;
    background:transparent;
  }
  .mvip-split-left-capture-overlay.is-active { display:block; pointer-events:auto; }
  .mvip-split-left-capture-selection {
    position:absolute; left:0; top:0; width:0; height:0; display:none;
    box-sizing:border-box; border:2px dashed #2563eb; border-radius:5px;
    background:rgba(37,99,235,.06); box-shadow:none;
    pointer-events:none;
  }
  .mvip-split-left-capture-overlay.is-selecting .mvip-split-left-capture-selection { display:block; }
  .mvip-split-capture-rendering .mvip-left-temporary-paste-box {
    border-color:transparent !important; border-radius:0 !important; box-shadow:none !important;
  }

  /* Tất cả thanh viết/vẽ dùng cùng một trật tự. Các nút cấu hình nằm ngay sau
     công cụ tương ứng; Chụp màn hình luôn là nút cuối của nhóm công cụ chung. */
  .cv7991-side-ink-dock [data-side-ink-tool="cursor"],
  #wordImageZoomInkTools [data-zoom-ink-tool="cursor"],
  #mvipWhiteboardToolDock [data-whiteboard-native-tool="cursor"] { order:10; }
  .cv7991-side-ink-dock [data-side-ink-tool="pen"],
  #wordImageZoomInkTools [data-zoom-ink-tool="pen"],
  #mvipWhiteboardToolDock [data-whiteboard-native-tool="pen"] { order:20; }
  .cv7991-side-ink-dock .cv7991-side-ink-color-config,
  #wordImageZoomInkTools .word-image-zoom-ink-color-config-btn,
  #mvipWhiteboardColorBtn { order:30; }
  .cv7991-side-ink-dock [data-side-ink-tool="eraser"],
  #wordImageZoomInkTools [data-zoom-ink-tool="eraser"],
  #mvipWhiteboardToolDock [data-whiteboard-native-tool="eraser"] { order:40; }
  .cv7991-side-ink-dock .cv7991-side-ink-eraser-config,
  #wordImageZoomInkTools .word-image-zoom-ink-eraser-config-btn { order:45; }
  .cv7991-side-ink-dock [data-side-ink-tool="laser"],
  #wordImageZoomInkTools [data-zoom-ink-tool="laser"],
  #mvipWhiteboardToolDock [data-whiteboard-native-tool="laser"] { order:50; }
  .cv7991-side-ink-dock [data-side-ink-tool="highlighter"],
  #wordImageZoomInkTools [data-zoom-ink-tool="highlighter"],
  #mvipWhiteboardToolDock [data-whiteboard-native-tool="highlighter"] { order:60; }
  .cv7991-side-ink-dock .cv7991-side-geometry-tool,
  #wordImageZoomInkTools .cv7991-side-geometry-tool,
  #mvipWhiteboardGeometryToolBtn { order:70; }
  .cv7991-side-ink-dock .cv7991-side-ink-undo,
  #wordImageZoomInkTools .word-image-zoom-ink-undo-btn,
  #mvipWhiteboardUndoBtn { order:80; }
  .cv7991-side-ink-dock .cv7991-side-ink-clear,
  #wordImageZoomInkTools .word-image-zoom-ink-clear-btn,
  #mvipWhiteboardClearBtn { order:90; }
  .cv7991-side-ink-dock .mvip-split-left-capture-btn,
  #wordImageZoomCaptureBtn,
  #mvipWhiteboardCaptureBtn { order:100; }
  #mvipWhiteboardPasteBtn { order:110; }
  #mvipWhiteboardSizeBtn { order:120; }
  #mvipWhiteboardCloseBtn { order:130; }
  .cv7991-side-ink-dock .cv7991-side-ink-popover,
  .cv7991-side-ink-dock .cv7991-geometry-menu,
  #wordImageZoomInkTools .word-image-zoom-ink-popover,
  #wordImageZoomInkTools .cv7991-geometry-menu,
  #mvipWhiteboardColorMenu,
  #mvipWhiteboardGeometryMenu { order:900; }

  .mvip-split-left-capture-btn,
  #wordImageZoomCaptureBtn {
    border-color:#2563eb !important; color:#1d4ed8 !important; background:#eff6ff !important;
  }
  .mvip-split-left-capture-btn[aria-pressed="true"],
  #wordImageZoomCaptureBtn[aria-pressed="true"] {
    background:#1d4ed8 !important; color:#fff !important;
  }
  #wordPresentationImageZoomContent { position:relative !important; }
  @media (max-width:760px) {
    .mvip-whiteboard-split-btn { min-width:36px; width:36px; padding:0; }
    .mvip-whiteboard-split-btn span { display:none; }
    #mvipWhiteboardPanel.is-split .mvip-whiteboard-geometry-menu {
      width:min(310px, calc(50vw - 16px)) !important;
    }
  }
</style>
<script id="mvip-whiteboard-split-screen-bootstrap-20260825">
(() => {
  'use strict';
  const panel = document.getElementById('mvipWhiteboardPanel');
  const boardViewport = document.getElementById('mvipWhiteboardViewport');
  const surface = document.getElementById('mvipWhiteboardSurface');
  const sizeBtn = document.getElementById('mvipWhiteboardSizeBtn');
  const closeBtn = document.getElementById('mvipWhiteboardCloseBtn');
  const imageZoomModal = document.getElementById('wordPresentationImageZoomModal');
  if (!(panel instanceof HTMLElement) || !(surface instanceof HTMLElement)
      || document.getElementById('wordPresentationWhiteboardSplitBtn')) return;

  const SPLIT_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><rect x="2.5" y="4" width="19" height="16" rx="2" stroke="currentColor" stroke-width="2"/><path d="M12 4v16" stroke="currentColor" stroke-width="2"/><path d="M6.5 8.5h2.8M6.5 12h2.8M15 8.5h2.8M15 12h2.8" stroke="currentColor" stroke-width="1.6" stroke-linecap="round"/></svg>';
  const EXPAND_BOARD_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M14 10L21 3M16 3H21V8M10 14L3 21M8 21H3V16" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
  const SHRINK_BOARD_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M21 3L14 10M14 5V10H19M3 21L10 14M10 19V14H5" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>';
  const CAPTURE_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M8 3H4a1 1 0 0 0-1 1v4M16 3h4a1 1 0 0 1 1 1v4M21 16v4a1 1 0 0 1-1 1h-4M8 21H4a1 1 0 0 1-1-1v-4" stroke="currentColor" stroke-width="2" stroke-linecap="round"/><rect x="7" y="7" width="10" height="10" rx="1.5" stroke="currentColor" stroke-width="1.7" stroke-dasharray="2.4 2.4"/></svg>';
  const SHARED_INK_TOOLS = new Set(['cursor', 'pen', 'eraser', 'laser', 'highlighter']);
  const splitButtons = [];
  const pasteButtons = [];
  const splitCaptureButtons = [];
  const dockOrigins = new Map();
  const splitControlOrigins = new Map();
  const paneModeOrigins = new Map();
  let splitPresenter = null;
  let rightMode = 'whiteboard';
  let layoutFrame = 0;
  let splitControlObserver = null;
  let syntheticResize = false;
  let syncingInkTool = false;
  let handlingAnswer = false;
  let latestCapture = null;
  const temporaryPasteUrls = new Set();
  let temporaryPasteInteraction = null;
  let leftCaptureState = null;
  let sharedCaptureMode = false;
  let syncingCaptureMode = false;
  let boardScrollBeforeAnswer = { left:0, top:0 };
  let lastWhiteboardPresenterId = 'wordPresentationPresenter';

  const answerLayer = document.createElement('div');
  answerLayer.id = 'mvipWhiteboardSplitAnswerLayer';
  answerLayer.hidden = true;
  answerLayer.setAttribute('aria-live', 'polite');
  answerLayer.setAttribute('aria-label', 'Đáp án ở nửa phải');
  const answerHost = boardViewport instanceof HTMLElement ? boardViewport : surface;
  answerHost.insertBefore(answerLayer, answerHost.firstChild);

  const panelHead = panel.querySelector('.mvip-whiteboard-head');
  const panelToolDock = document.getElementById('mvipWhiteboardToolDock');
  const paneModeControls = document.createElement('div');
  paneModeControls.id = 'mvipWhiteboardSplitModeControls';
  paneModeControls.setAttribute('role', 'tablist');
  paneModeControls.setAttribute('aria-label', 'Chọn nội dung màn hình phải');
  if (panelHead instanceof HTMLElement) {
    panelHead.insertBefore(paneModeControls, panelToolDock instanceof Node ? panelToolDock : null);
  }

  /* Thanh riêng cho PowerPoint chia đôi. Dùng một lớp độc lập đặt trực tiếp
     trong presenter để không phụ thuộc cách toolbar Word tự căn sang phải. */
  const powerpointSplitToolStrip = document.createElement('div');
  powerpointSplitToolStrip.id = 'mvipPowerPointSplitLeftToolStrip';
  powerpointSplitToolStrip.hidden = true;
  powerpointSplitToolStrip.setAttribute('role', 'toolbar');
  powerpointSplitToolStrip.setAttribute('aria-label', 'Công cụ màn hình trái PowerPoint');
  const powerpointStripHost = document.getElementById('wordPresentationPresenter');
  if (powerpointStripHost instanceof HTMLElement) powerpointStripHost.appendChild(powerpointSplitToolStrip);

  function createSplitButton(id, presenterId) {
    const button = document.createElement('button');
    button.type = 'button'; button.id = id; button.className = 'mvip-whiteboard-split-btn';
    button.setAttribute('data-mvip-whiteboard-split-presenter', presenterId);
    button.setAttribute('aria-label', 'Chia đôi màn hình: bên trái trình chiếu, bên phải bảng trắng');
    button.setAttribute('aria-pressed', 'false');
    button.title = 'Chia đôi màn hình';
    button.innerHTML = `${SPLIT_ICON}<span>Chia đôi màn hình</span>`;
    splitButtons.push(button);
    return button;
  }
  function createPasteButton(id, presenterId) {
    const button = document.createElement('button');
    button.type = 'button';
    button.id = id;
    button.className = 'mvip-left-paste-capture-btn';
    button.hidden = true;
    button.textContent = 'Paste';
    button.setAttribute('data-mvip-paste-presenter', presenterId);
    button.setAttribute('aria-label', 'Dán ảnh vừa chụp tạm thời lên màn hình trình chiếu');
    button.title = 'Paste ảnh vừa chụp lên màn hình trái';
    pasteButtons.push(button);
    return button;
  }
  function createSplitCaptureButton(id, presenterId) {
    const button = document.createElement('button');
    button.type = 'button';
    button.id = id;
    button.className = 'cv7991-side-ink-tool mvip-split-left-capture-btn';
    button.hidden = false;
    button.innerHTML = CAPTURE_ICON;
    button.setAttribute('data-mvip-capture-presenter', presenterId);
    button.setAttribute('data-mvip-capture-source', 'presentation');
    button.setAttribute('data-mvip-capture-idle-title', 'Chụp vùng màn hình trình chiếu');
    button.setAttribute('aria-label', 'Chụp vùng màn hình trình chiếu trái');
    button.setAttribute('aria-pressed', 'false');
    button.title = 'Chụp vùng màn hình trình chiếu';
    splitCaptureButtons.push(button);
    return button;
  }

  const singleBoardBtn = document.getElementById('singleExamWhiteboardBtn');
  if (singleBoardBtn && singleBoardBtn.parentElement) {
    singleBoardBtn.insertAdjacentElement('afterend', createSplitButton('singleExamWhiteboardSplitBtn', 'singleExamPresenter'));
  }
  const wordBoardBtn = document.getElementById('wordPresentationWhiteboardBtn');
  if (wordBoardBtn && wordBoardBtn.parentElement) {
    wordBoardBtn.insertAdjacentElement('afterend', createSplitButton('wordPresentationWhiteboardSplitBtn', 'wordPresentationPresenter'));
  }
  const singleActions = document.querySelector('#singleExamPresenter .single-exam-toolbar-actions');
  if (singleActions instanceof HTMLElement) {
    const singleInkDock = document.getElementById('singleExamSideInkDock');
    (singleInkDock instanceof HTMLElement ? singleInkDock : singleActions)
      .appendChild(createSplitCaptureButton('singleExamSplitCaptureBtn', 'singleExamPresenter'));
    singleActions.appendChild(createPasteButton('singleExamPasteCaptureBtn', 'singleExamPresenter'));
  }
  const wordActions = document.querySelector('#wordPresentationPresenter .word-presentation-actions');
  if (wordActions instanceof HTMLElement) {
    const wordInkDock = document.getElementById('wordPresentationSideInkDock');
    (wordInkDock instanceof HTMLElement ? wordInkDock : wordActions)
      .appendChild(createSplitCaptureButton('wordPresentationSplitCaptureBtn', 'wordPresentationPresenter'));
    wordActions.appendChild(createPasteButton('wordPresentationPasteCaptureBtn', 'wordPresentationPresenter'));
  }
  const whiteboardCaptureBtn = document.getElementById('mvipWhiteboardCaptureBtn');
  const whiteboardPasteBtn = document.createElement('button');
  whiteboardPasteBtn.type = 'button';
  whiteboardPasteBtn.id = 'mvipWhiteboardPasteBtn';
  whiteboardPasteBtn.className = 'mvip-whiteboard-action-btn';
  whiteboardPasteBtn.textContent = 'Paste';
  whiteboardPasteBtn.hidden = true;
  whiteboardPasteBtn.setAttribute('aria-label', 'Dán ảnh vừa chụp lên bảng trắng');
  whiteboardPasteBtn.title = 'Paste ảnh vừa chụp lên bảng trắng';
  if (whiteboardCaptureBtn && whiteboardCaptureBtn.parentElement) {
    whiteboardCaptureBtn.insertAdjacentElement('afterend', whiteboardPasteBtn);
  }
  const imageZoomTools = document.getElementById('wordImageZoomInkTools');
  let imageZoomCaptureBtn = document.getElementById('wordImageZoomCaptureBtn');
  if (!(imageZoomCaptureBtn instanceof HTMLButtonElement) && imageZoomTools instanceof HTMLElement) {
    imageZoomCaptureBtn = document.createElement('button');
    imageZoomCaptureBtn.type = 'button';
    imageZoomCaptureBtn.id = 'wordImageZoomCaptureBtn';
    imageZoomCaptureBtn.className = 'word-image-zoom-ink-tool-btn';
    imageZoomCaptureBtn.innerHTML = `${CAPTURE_ICON}<span>Chụp màn hình</span>`;
    imageZoomCaptureBtn.setAttribute('data-mvip-capture-host', 'wordPresentationImageZoomContent');
    imageZoomCaptureBtn.setAttribute('data-mvip-capture-source', 'image-zoom');
    imageZoomCaptureBtn.setAttribute('data-mvip-capture-idle-title', 'Chụp vùng hình ảnh phóng to');
    imageZoomCaptureBtn.setAttribute('aria-label', 'Chụp vùng hình ảnh phóng to');
    imageZoomCaptureBtn.setAttribute('aria-pressed', 'false');
    imageZoomCaptureBtn.title = 'Chụp vùng hình ảnh phóng to';
    imageZoomTools.appendChild(imageZoomCaptureBtn);
  }

  function whiteboardCaptureApi() {
    return window.mvipWhiteboardCaptureTool || null;
  }
  function currentLeftCaptureButton() {
    if (!(splitPresenter instanceof HTMLElement)) return null;
    return splitCaptureButtons.find((button) =>
      button.getAttribute('data-mvip-capture-presenter') === splitPresenter.id
    ) || null;
  }
  function paintSharedCaptureUi(active) {
    splitCaptureButtons.forEach((button) => {
      const belongsToCurrent = !!(splitPresenter
        && button.getAttribute('data-mvip-capture-presenter') === splitPresenter.id);
      const pressed = !!active && belongsToCurrent;
      button.setAttribute('aria-pressed', pressed ? 'true' : 'false');
      if (!pressed && !button.disabled) {
        button.title = button.getAttribute('data-mvip-capture-idle-title') || 'Chụp vùng màn hình trình chiếu';
      }
    });
    if (whiteboardCaptureBtn instanceof HTMLElement) {
      whiteboardCaptureBtn.setAttribute('aria-pressed', active ? 'true' : 'false');
      if (!active && !whiteboardCaptureBtn.disabled) whiteboardCaptureBtn.title = 'Chụp vùng bảng trắng';
    }
  }
  function setSharedCaptureMode(active) {
    if (syncingCaptureMode) return sharedCaptureMode;
    if (!(splitPresenter instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return false;
    syncingCaptureMode = true;
    try {
      if (!active) {
        sharedCaptureMode = false;
        cancelLeftCapture();
        const api = whiteboardCaptureApi();
        if (api && typeof api.isActive === 'function' && api.isActive()
            && typeof api.cancel === 'function') api.cancel();
        paintSharedCaptureUi(false);
        return false;
      }
      if (rightMode === 'answer') showWhiteboard();
      sharedCaptureMode = true;
      const leftButton = currentLeftCaptureButton();
      if (!leftCaptureState && leftButton instanceof HTMLElement) startLeftCapture(leftButton);
      const api = whiteboardCaptureApi();
      if (api && typeof api.start === 'function'
          && (!(typeof api.isActive === 'function') || !api.isActive())) api.start();
      paintSharedCaptureUi(true);
      return true;
    } finally {
      syncingCaptureMode = false;
    }
  }

  function boardButtonFor(presenterId) {
    return document.getElementById(presenterId === 'singleExamPresenter' ? 'singleExamWhiteboardBtn' : 'wordPresentationWhiteboardBtn');
  }
  function answerButtonFor(presenterId) {
    return document.getElementById(presenterId === 'singleExamPresenter' ? 'singleExamAnswerBtn' : 'wordPresentationAnswerBtn');
  }
  function restoreOptionalAttribute(element, name, hadAttribute, value) {
    if (!(element instanceof HTMLElement)) return;
    if (hadAttribute) element.setAttribute(name, value === null ? '' : value);
    else element.removeAttribute(name);
  }
  function movePaneModeButtonsToRight(presenter) {
    if (!(presenter instanceof HTMLElement) || !(paneModeControls instanceof HTMLElement)) return;
    const entries = [
      { button:boardButtonFor(presenter.id), mode:'whiteboard', controls:'mvipWhiteboardViewport' },
      { button:answerButtonFor(presenter.id), mode:'answer', controls:'mvipWhiteboardSplitAnswerLayer' }
    ];
    entries.forEach(({ button, mode, controls }) => {
      if (!(button instanceof HTMLElement)) return;
      if (!paneModeOrigins.has(button)) {
        const marker = document.createComment(`mvip-${mode}-button-origin`);
        if (button.parentNode) button.parentNode.insertBefore(marker, button);
        paneModeOrigins.set(button, {
          marker, parent:button.parentNode,
          hidden:button.hidden,
          hadAriaHidden:button.hasAttribute('aria-hidden'), ariaHidden:button.getAttribute('aria-hidden'),
          hadInert:button.hasAttribute('inert'), inert:!!button.inert,
          hadRole:button.hasAttribute('role'), role:button.getAttribute('role'),
          hadSelected:button.hasAttribute('aria-selected'), selected:button.getAttribute('aria-selected'),
          hadControls:button.hasAttribute('aria-controls'), controls:button.getAttribute('aria-controls'),
          hadPressed:button.hasAttribute('aria-pressed'), pressed:button.getAttribute('aria-pressed')
        });
      }
      button.hidden = false;
      button.removeAttribute('aria-hidden');
      button.removeAttribute('inert');
      button.removeAttribute('data-mvip-split-force-hidden');
      button.classList.add('mvip-split-pane-mode-button');
      button.setAttribute('data-mvip-split-pane-mode', mode);
      button.setAttribute('role', 'tab');
      button.setAttribute('aria-controls', controls);
      paneModeControls.appendChild(button);
    });
  }
  function restorePaneModeButtons() {
    paneModeOrigins.forEach((origin, button) => {
      if (!(button instanceof HTMLElement)) return;
      button.classList.remove('mvip-split-pane-mode-button', 'is-split-pane-active');
      button.removeAttribute('data-mvip-split-pane-mode');
      restoreOptionalAttribute(button, 'role', origin.hadRole, origin.role);
      restoreOptionalAttribute(button, 'aria-selected', origin.hadSelected, origin.selected);
      restoreOptionalAttribute(button, 'aria-controls', origin.hadControls, origin.controls);
      restoreOptionalAttribute(button, 'aria-pressed', origin.hadPressed, origin.pressed);
      button.hidden = origin.hidden;
      restoreOptionalAttribute(button, 'aria-hidden', origin.hadAriaHidden, origin.ariaHidden);
      if (origin.hadInert) {
        button.setAttribute('inert', '');
        button.inert = origin.inert;
      } else button.removeAttribute('inert');
      button.removeAttribute('data-mvip-split-force-hidden');
      if (origin.marker instanceof Node && origin.marker.parentNode) origin.marker.replaceWith(button);
      else if (origin.parent instanceof Node) origin.parent.appendChild(button);
    });
    paneModeOrigins.clear();
  }
  function leftInkApi() {
    if (!splitPresenter) return null;
    return splitPresenter.id === 'singleExamPresenter' ? window.mvipSingleExamInkTool : window.mvipWordInkTool;
  }
  function leftGeometryApi() {
    if (!splitPresenter) return null;
    return splitPresenter.id === 'singleExamPresenter' ? window.mvipSingleExamGeometryTool : window.mvipWordGeometryTool;
  }
  function syncButtons() {
    splitButtons.forEach((button) => {
      const active = !!(splitPresenter && button.getAttribute('data-mvip-whiteboard-split-presenter') === splitPresenter.id && !panel.hidden);
      button.setAttribute('aria-pressed', active ? 'true' : 'false');
      button.title = active ? 'Thoát chia đôi màn hình' : 'Chia đôi màn hình';
    });
  }
  function syncPaneButtons() {
    document.querySelectorAll('.mvip-whiteboard-open-btn, .word-presentation-answer-btn, .single-exam-answer-btn')
      .forEach((button) => button.classList.remove('is-split-pane-active'));
    if (!(splitPresenter instanceof HTMLElement) || panel.hidden) return;
    const boardBtn = boardButtonFor(splitPresenter.id);
    const answerBtn = answerButtonFor(splitPresenter.id);
    [boardBtn, answerBtn].forEach((button) => {
      if (!(button instanceof HTMLElement)) return;
      button.setAttribute('aria-selected', 'false');
      button.setAttribute('aria-pressed', 'false');
    });
    if (rightMode === 'answer') {
      if (answerBtn) {
        answerBtn.classList.add('is-split-pane-active');
        answerBtn.setAttribute('aria-selected', 'true');
        answerBtn.setAttribute('aria-pressed', 'true');
      }
    } else {
      if (boardBtn) {
        boardBtn.classList.add('is-split-pane-active');
        boardBtn.setAttribute('aria-selected', 'true');
        boardBtn.setAttribute('aria-pressed', 'true');
      }
    }
  }
  function showWhiteboard() {
    const wasAnswer = rightMode === 'answer';
    rightMode = 'whiteboard';
    panel.setAttribute('data-split-content', 'whiteboard');
    answerLayer.hidden = true;
    syncPaneButtons();
    if (wasAnswer && boardViewport instanceof HTMLElement) {
      requestAnimationFrame(() => {
        boardViewport.scrollLeft = boardScrollBeforeAnswer.left;
        boardViewport.scrollTop = boardScrollBeforeAnswer.top;
      });
    }
  }
  function prepareAnswerViewport() {
    try { setSharedCaptureMode(false); } catch (_) {}
    if (!(boardViewport instanceof HTMLElement)) return;
    if (rightMode !== 'answer') {
      boardScrollBeforeAnswer = {
        left:Math.max(0, Number(boardViewport.scrollLeft) || 0),
        top:Math.max(0, Number(boardViewport.scrollTop) || 0)
      };
    }
    boardViewport.scrollLeft = 0;
    boardViewport.scrollTop = 0;
  }
  function sanitizeAnswerClone(node) {
    if (!(node instanceof Element)) return node;
    node.removeAttribute('id');
    node.removeAttribute('aria-modal');
    node.querySelectorAll(
      '.word-presentation-ink-canvas, .cv7991-geometry-canvas, '
      + '.word-presentation-ink-eraser-cursor, .word-presentation-region-overlay, '
      + '.word-presentation-region-zoom-pane, .single-exam-region-overlay, .single-exam-region-zoom-pane'
    ).forEach((overlay) => overlay.remove());
    node.querySelectorAll('[id]').forEach((element) => element.removeAttribute('id'));
    return node;
  }
  function cloneAnswerContent(source) {
    if (!(source instanceof Element)) return source.cloneNode(true);
    const clone = source.cloneNode(true);
    /* cloneNode không sao chép phần bitmap đã vẽ của canvas. Chép lại riêng
       từng canvas để biểu đồ trong đáp án không biến thành một khung trắng. */
    const sourceCanvases = [
      ...(source instanceof HTMLCanvasElement ? [source] : []),
      ...source.querySelectorAll('canvas')
    ];
    const cloneCanvases = [
      ...(clone instanceof HTMLCanvasElement ? [clone] : []),
      ...clone.querySelectorAll('canvas')
    ];
    sourceCanvases.forEach((sourceCanvas, index) => {
      const cloneCanvas = cloneCanvases[index];
      if (!(cloneCanvas instanceof HTMLCanvasElement)) return;
      cloneCanvas.width = sourceCanvas.width;
      cloneCanvas.height = sourceCanvas.height;
      try {
        const context = cloneCanvas.getContext('2d');
        if (context) context.drawImage(sourceCanvas, 0, 0);
      } catch (_) {}
    });
    return sanitizeAnswerClone(clone);
  }
  function showAnswerNode(title, contentNode) {
    if (!(contentNode instanceof Node)) return false;
    prepareAnswerViewport();
    const card = document.createElement('article');
    card.className = 'mvip-whiteboard-split-answer-card';
    const heading = document.createElement('h2');
    heading.className = 'mvip-whiteboard-split-answer-title';
    heading.textContent = String(title || 'Đáp án');
    const body = document.createElement('div');
    body.className = 'mvip-whiteboard-split-answer-body';
    body.appendChild(contentNode);
    card.append(heading, body);
    answerLayer.replaceChildren(card);
    answerLayer.hidden = false;
    answerLayer.scrollTop = 0;
    rightMode = 'answer';
    panel.setAttribute('data-split-content', 'answer');
    syncPaneButtons();
    return true;
  }
  function clearTemporaryPaste() {
    if (temporaryPasteInteraction && temporaryPasteInteraction.box instanceof HTMLElement) {
      try { temporaryPasteInteraction.box.releasePointerCapture(temporaryPasteInteraction.pointerId); } catch (_) {}
    }
    temporaryPasteInteraction = null;
    document.querySelectorAll('.mvip-left-temporary-paste-layer').forEach(removePastedImageLayer);
  }
  function removePastedImageLayer(layer) {
    if (!(layer instanceof HTMLElement)) return;
    const objectUrl = String(layer._mvipPastedImageUrl || '');
    if (objectUrl) {
      try { URL.revokeObjectURL(objectUrl); } catch (_) {}
      temporaryPasteUrls.delete(objectUrl);
    }
    if (temporaryPasteInteraction && temporaryPasteInteraction.box
        && layer.contains(temporaryPasteInteraction.box)) temporaryPasteInteraction = null;
    layer.remove();
  }
  function pasteHostFor(presenterId) {
    return document.getElementById(presenterId === 'singleExamPresenter' ? 'singleExamSlide' : 'wordPresentationViewport');
  }
  function temporaryPasteHostMetrics(host) {
    const rect = host.getBoundingClientRect();
    const width = Math.max(1, Number(host.clientWidth) || rect.width || 1);
    const height = Math.max(1, Number(host.clientHeight) || rect.height || 1);
    return {
      width, height,
      // The bounding box includes borders and scrollbar gutters; clientWidth
      // does not. Use the matching outer box to measure only visual scaling.
      scaleX:Math.max(.01, rect.width / (Number(host.offsetWidth) || width)),
      scaleY:Math.max(.01, rect.height / (Number(host.offsetHeight) || height))
    };
  }
  function temporaryPasteBoxValues(box) {
    return {
      left:Number.parseFloat(box.style.left) || 0,
      top:Number.parseFloat(box.style.top) || 0,
      width:Math.max(1, Number.parseFloat(box.style.width) || box.offsetWidth || 1),
      height:Math.max(1, Number.parseFloat(box.style.height) || box.offsetHeight || 1)
    };
  }
  function constrainTemporaryPaste() {
    document.querySelectorAll('.mvip-left-temporary-paste-box').forEach((box) => {
      if (!(box instanceof HTMLElement)) return;
      const layer = box.parentElement;
      const host = layer && layer.parentElement;
      if (!(host instanceof HTMLElement)) return;
      const metrics = temporaryPasteHostMetrics(host);
      const values = temporaryPasteBoxValues(box);
      const aspect = Math.max(.05, Number(box.getAttribute('data-paste-aspect')) || values.width / values.height || 1);
      let width = Math.min(values.width, metrics.width);
      let height = width / aspect;
      if (height > metrics.height) { height = metrics.height; width = height * aspect; }
      const left = Math.max(0, Math.min(values.left, metrics.width - width));
      const top = Math.max(0, Math.min(values.top, metrics.height - height));
      box.style.left = `${left}px`; box.style.top = `${top}px`;
      box.style.width = `${width}px`; box.style.height = `${height}px`;
    });
  }
  function beginTemporaryPasteInteraction(event) {
    const box = event.currentTarget;
    if (!(box instanceof HTMLElement) || (event.pointerType === 'mouse' && event.button !== 0)) return;
    if (event.target instanceof Element && event.target.closest('.mvip-pasted-image-close')) return;
    const layer = box.parentElement;
    const host = layer && layer.parentElement;
    if (!(host instanceof HTMLElement)) return;
    event.preventDefault(); event.stopImmediatePropagation();
    host.appendChild(layer);
    const values = temporaryPasteBoxValues(box);
    const metrics = temporaryPasteHostMetrics(host);
    const resizeHandle = event.target instanceof Element && event.target.closest('.mvip-left-paste-resize-handle');
    temporaryPasteInteraction = {
      box, host, pointerId:event.pointerId, mode:resizeHandle ? 'resize' : 'move',
      startX:Number(event.clientX) || 0, startY:Number(event.clientY) || 0,
      left:values.left, top:values.top, width:values.width, height:values.height,
      aspect:Math.max(.05, Number(box.getAttribute('data-paste-aspect')) || values.width / values.height || 1),
      scaleX:metrics.scaleX, scaleY:metrics.scaleY
    };
    box.classList.toggle('is-resizing', !!resizeHandle);
    box.classList.toggle('is-moving', !resizeHandle);
    try { box.setPointerCapture(event.pointerId); } catch (_) {}
  }
  function moveTemporaryPasteInteraction(event) {
    const interaction = temporaryPasteInteraction;
    if (!interaction || event.pointerId !== interaction.pointerId) return;
    event.preventDefault(); event.stopImmediatePropagation();
    const metrics = temporaryPasteHostMetrics(interaction.host);
    const dx = (Number(event.clientX) - interaction.startX) / interaction.scaleX;
    const dy = (Number(event.clientY) - interaction.startY) / interaction.scaleY;
    if (interaction.mode === 'move') {
      const left = Math.max(0, Math.min(interaction.left + dx, metrics.width - interaction.width));
      const top = Math.max(0, Math.min(interaction.top + dy, metrics.height - interaction.height));
      interaction.box.style.left = `${left}px`;
      interaction.box.style.top = `${top}px`;
      return;
    }
    const minimumWidth = Math.min(90, metrics.width);
    const widthFromX = interaction.width + dx;
    const widthFromY = interaction.width + dy * interaction.aspect;
    let width = Math.abs(dx) >= Math.abs(dy * interaction.aspect) ? widthFromX : widthFromY;
    const maximumWidth = Math.max(minimumWidth, Math.min(
      metrics.width - interaction.left,
      (metrics.height - interaction.top) * interaction.aspect
    ));
    width = Math.max(minimumWidth, Math.min(width, maximumWidth));
    interaction.box.style.width = `${width}px`;
    interaction.box.style.height = `${width / interaction.aspect}px`;
  }
  function finishTemporaryPasteInteraction(event) {
    const interaction = temporaryPasteInteraction;
    if (!interaction || (event && event.pointerId !== interaction.pointerId)) return;
    if (event) { event.preventDefault(); event.stopImmediatePropagation(); }
    temporaryPasteInteraction = null;
    try { interaction.box.releasePointerCapture(interaction.pointerId); } catch (_) {}
    interaction.box.classList.remove('is-moving', 'is-resizing');
    constrainTemporaryPaste();
  }
  function createPastedCapture(host, layerClass, visibleRect) {
    if (!latestCapture || !(latestCapture.blob instanceof Blob) || !(host instanceof HTMLElement)) return false;
    const existingCount = host.querySelectorAll(`.${layerClass}`).length;
    const layer = document.createElement('div');
    layer.className = layerClass;
    layer.setAttribute('aria-label', 'Ảnh tạm vừa dán');
    const box = document.createElement('div');
    box.className = 'mvip-left-temporary-paste-box';
    box.setAttribute('role', 'group');
    box.setAttribute('aria-label', 'Ảnh tạm. Kéo ảnh để di chuyển, kéo nút ở góc để đổi kích thước.');
    box.title = 'Kéo ảnh để di chuyển; kéo nút tròn ở góc để phóng to hoặc thu nhỏ';
    const image = document.createElement('img');
    const objectUrl = URL.createObjectURL(latestCapture.blob);
    temporaryPasteUrls.add(objectUrl);
    layer._mvipPastedImageUrl = objectUrl;
    image.src = objectUrl;
    image.alt = 'Ảnh tạm vừa chụp';
    image.draggable = false;
    const resizeHandle = document.createElement('button');
    resizeHandle.type = 'button';
    resizeHandle.className = 'mvip-left-paste-resize-handle';
    resizeHandle.setAttribute('aria-label', 'Kéo để phóng to hoặc thu nhỏ ảnh');
    resizeHandle.title = 'Kéo để phóng to hoặc thu nhỏ ảnh';
    const closeButton = document.createElement('button');
    closeButton.type = 'button';
    closeButton.className = 'mvip-pasted-image-close';
    closeButton.textContent = '×';
    closeButton.setAttribute('aria-label', 'Xóa ảnh này');
    closeButton.title = 'Xóa ảnh này';
    const metrics = temporaryPasteHostMetrics(host);
    const frame = visibleRect && Number(visibleRect.width) > 0 && Number(visibleRect.height) > 0
      ? {
          left:Math.max(0, Number(visibleRect.left) || 0),
          top:Math.max(0, Number(visibleRect.top) || 0),
          width:Math.min(metrics.width, Number(visibleRect.width) || metrics.width),
          height:Math.min(metrics.height, Number(visibleRect.height) || metrics.height)
        }
      : { left:0, top:0, width:metrics.width, height:metrics.height };
    const sourceWidth = Math.max(1, Number(latestCapture.visualWidth) > 0
      ? Number(latestCapture.visualWidth) / metrics.scaleX
      : Number(latestCapture.cssWidth) || Number(latestCapture.width) || 1);
    const sourceHeight = Math.max(1, Number(latestCapture.visualHeight) > 0
      ? Number(latestCapture.visualHeight) / metrics.scaleY
      : Number(latestCapture.cssHeight) || Number(latestCapture.height) || 1);
    const aspect = sourceWidth / sourceHeight;
    const fit = Math.min(1, frame.width / sourceWidth, frame.height / sourceHeight);
    const width = sourceWidth * fit;
    const height = sourceHeight * fit;
    const cascade = (existingCount % 8) * 22;
    box.setAttribute('data-paste-aspect', String(aspect));
    box.style.width = `${width}px`; box.style.height = `${height}px`;
    box.style.left = `${Math.max(0, Math.min(frame.left + (frame.width - width) / 2 + cascade, metrics.width - width))}px`;
    box.style.top = `${Math.max(0, Math.min(frame.top + (frame.height - height) / 2 + cascade, metrics.height - height))}px`;
    box.append(image, resizeHandle, closeButton);
    box.addEventListener('pointerdown', beginTemporaryPasteInteraction);
    box.addEventListener('pointermove', moveTemporaryPasteInteraction);
    box.addEventListener('pointerup', finishTemporaryPasteInteraction);
    box.addEventListener('pointercancel', finishTemporaryPasteInteraction);
    box.addEventListener('lostpointercapture', () => finishTemporaryPasteInteraction());
    box.addEventListener('click', (event) => { event.preventDefault(); event.stopImmediatePropagation(); });
    closeButton.addEventListener('pointerdown', (event) => { event.preventDefault(); event.stopImmediatePropagation(); });
    closeButton.addEventListener('click', (event) => {
      event.preventDefault(); event.stopImmediatePropagation(); removePastedImageLayer(layer);
    });
    layer.appendChild(box);
    host.appendChild(layer);
    return true;
  }
  function showTemporaryPaste(presenterId) {
    const host = pasteHostFor(presenterId);
    return createPastedCapture(host, 'mvip-left-temporary-paste-layer');
  }
  function showWhiteboardPaste() {
    const whiteboardViewport = document.getElementById('mvipWhiteboardViewport');
    const frame = whiteboardViewport instanceof HTMLElement
      ? {
          left:whiteboardViewport.scrollLeft,
          top:whiteboardViewport.scrollTop,
          width:whiteboardViewport.clientWidth,
          height:whiteboardViewport.clientHeight
        }
      : null;
    return createPastedCapture(surface, 'mvip-whiteboard-pasted-image-layer', frame);
  }
  function updatePasteButtons() {
    const ready = !!(latestCapture && latestCapture.blob instanceof Blob);
    pasteButtons.forEach((button) => {
      if (ready) button.setAttribute('data-mvip-capture-ready', 'true');
      else button.removeAttribute('data-mvip-capture-ready');
      const belongsToActive = !!(ready && splitPresenter && !panel.hidden
        && button.getAttribute('data-mvip-paste-presenter') === splitPresenter.id);
      button.hidden = !belongsToActive;
      if (belongsToActive) {
        button.removeAttribute('aria-hidden');
        button.removeAttribute('inert');
        button.removeAttribute('data-mvip-split-force-hidden');
      }
    });
    whiteboardPasteBtn.hidden = !ready;
    whiteboardPasteBtn.setAttribute('aria-disabled', ready ? 'false' : 'true');
    if (splitPresenter) enforceSplitToolbarControls(splitPresenter);
    syncPowerPointSplitProxyButtons();
  }
  function splitSolutionApiFor(presenterId) {
    return presenterId === 'singleExamPresenter'
      ? window.mvipSingleExamSplitSolutionApi
      : window.mvipWordSplitSolutionApi;
  }
  function splitQuestionFormat(presenterId) {
    const api = splitSolutionApiFor(presenterId);
    try { return String(api && typeof api.format === 'function' ? api.format() : '').trim().toLowerCase(); }
    catch (_) { return ''; }
  }
  function splitUsesAutoSolutionPane(presenterId) {
    const format = splitQuestionFormat(presenterId);
    return format === 'mc' || format === 'tf';
  }
  function splitNoSolutionNode() {
    const empty = document.createElement('div');
    empty.className = 'mvip-whiteboard-split-solution-empty';
    empty.textContent = 'Không có lời giải';
    return empty;
  }
  function showCurrentSplitSolution(presenterId) {
    const api = splitSolutionApiFor(presenterId);
    let node = null;
    try {
      if (api && typeof api.hasSolution === 'function' && api.hasSolution()
          && typeof api.cloneSolutionNode === 'function') node = api.cloneSolutionNode();
    } catch (_) { node = null; }
    if (!(node instanceof Node)) node = splitNoSolutionNode();
    showAnswerNode('Lời giải', node);
    return true;
  }
  function cloneWordAnswerAfterNativeClick(button) {
    const autoSolutionPane = splitUsesAutoSolutionPane('wordPresentationPresenter');

    /* Tự luận/Trả lời ngắn dùng cơ chế đáp án dạng modal. Khác với MC/Đúng-Sai,
       nút Đáp án của hai dạng này không nhất thiết mang trạng thái is-active sau
       khi modal mở. Vì vậy phải lấy nội dung modal TRƯỚC khi kiểm tra trạng thái
       nút, rồi chuyển nguyên đáp án sang nửa phải. */
    if (!autoSolutionPane) {
      const modal = document.getElementById('wordPresentationAnswerModal');
      const title = document.getElementById('wordPresentationAnswerTitle');
      const content = document.getElementById('wordPresentationAnswerContent');
      if (modal instanceof HTMLElement && !modal.hidden && content instanceof HTMLElement) {
        const answerWasActive = button.classList.contains('is-active') || button.getAttribute('aria-pressed') === 'true';
        const clone = cloneAnswerContent(content);
        showAnswerNode(title && title.textContent ? title.textContent : 'Đáp án', clone);
        const modalClose = document.getElementById('wordPresentationAnswerCloseBtn');
        if (modalClose instanceof HTMLButtonElement) modalClose.click();

        /* Với tự luận nhiều ý, trình xử lý gốc có thể giữ nút ở trạng thái
           "Ẩn đáp án". Sau khi đã đưa đáp án sang nửa phải, trả nửa trái về
           đúng câu hỏi để lần bấm sau vẫn chỉ cần một lần. */
        if (answerWasActive && button.classList.contains('is-active')) {
          handlingAnswer = true;
          try { button.click(); } finally { handlingAnswer = false; }
        }
        requestAnimationFrame(() => { try { button.focus({ preventScroll:true }); } catch (_) {} });
        return true;
      }
    }

    const revealed = button.classList.contains('is-active') || button.getAttribute('aria-pressed') === 'true';
    if (!revealed) {
      if (rightMode === 'answer') showWhiteboard();
      return false;
    }
    if (autoSolutionPane) {
      return showCurrentSplitSolution('wordPresentationPresenter');
    }

    /* Dạng không dùng modal nhưng có đáp án tô trực tiếp trên câu: sao chép
       trạng thái đã hiện đáp án sang nửa phải rồi trả nửa trái về câu hỏi. */
    const card = document.getElementById('wordPresentationCard');
    if (!(card instanceof HTMLElement)) return false;
    const clone = cloneAnswerContent(card);
    showAnswerNode('Đáp án', clone);
    handlingAnswer = true;
    try { button.click(); } finally { handlingAnswer = false; }
    return true;
  }
  function cloneSingleAnswerAfterNativeClick(button) {
    const revealed = button.classList.contains('is-active') || button.getAttribute('aria-pressed') === 'true';
    if (!revealed) {
      if (rightMode === 'answer') showWhiteboard();
      return false;
    }
    if (splitUsesAutoSolutionPane('singleExamPresenter')) {
      return showCurrentSplitSolution('singleExamPresenter');
    }
    const slide = document.getElementById('singleExamSlide');
    if (!(slide instanceof HTMLElement)) return false;
    const clone = cloneAnswerContent(slide);
    showAnswerNode('Đáp án', clone);
    return true;
  }
  function handleAnswerAfterNativeClick(button) {
    if (handlingAnswer || !(splitPresenter instanceof HTMLElement) || panel.hidden
        || button !== answerButtonFor(splitPresenter.id)) return;
    const shown = splitPresenter.id === 'singleExamPresenter'
      ? cloneSingleAnswerAfterNativeClick(button)
      : cloneWordAnswerAfterNativeClick(button);
    if (shown) requestAnimationFrame(syncPaneButtons);
  }
  function interceptSplitSolutionButton(event, button) {
    if (handlingAnswer || !(splitPresenter instanceof HTMLElement) || panel.hidden
        || button !== answerButtonFor(splitPresenter.id)
        || !splitUsesAutoSolutionPane(splitPresenter.id)) return;
    const alreadyRevealed = button.classList.contains('is-active') || button.getAttribute('aria-pressed') === 'true';
    const isSolutionButton = String(button.textContent || '').trim().toLowerCase() === 'lời giải';
    if (!alreadyRevealed || !isSolutionButton) return;
    /* Khi đáp án đã hiện, nút mang nhãn Lời giải. Trong chia đôi không mở modal
       chồng lên nửa trái; chỉ làm mới lời giải ở nửa phải. */
    event.preventDefault();
    event.stopImmediatePropagation();
    showCurrentSplitSolution(splitPresenter.id);
    requestAnimationFrame(syncPaneButtons);
  }
  function moveInkDockToTop(presenter) {
    if (!(presenter instanceof HTMLElement)) return;
    const dockId = presenter.id === 'singleExamPresenter' ? 'singleExamSideInkDock' : 'wordPresentationSideInkDock';
    const dock = document.getElementById(dockId);
    const toolbar = presenter.querySelector(presenter.id === 'singleExamPresenter' ? '.single-exam-toolbar' : '.word-presentation-toolbar');
    const actions = toolbar && toolbar.querySelector(
      presenter.id === 'singleExamPresenter' ? '.single-exam-toolbar-actions' : '.word-presentation-actions'
    );
    if (!(dock instanceof HTMLElement) || !(actions instanceof HTMLElement)) return;
    if (!dockOrigins.has(dock)) dockOrigins.set(dock, { parent:dock.parentNode, next:dock.nextSibling });
    actions.appendChild(dock);
    dock.classList.add('mvip-split-horizontal-ink-dock');
    const captureButton = dock.querySelector('[data-mvip-capture-presenter]');
    if (captureButton instanceof HTMLElement) {
      captureButton.hidden = false;
      captureButton.removeAttribute('aria-hidden');
      captureButton.removeAttribute('inert');
      captureButton.removeAttribute('data-mvip-split-force-hidden');
    }
  }
  function powerPointSplitToolStripFor(presenter) {
    return presenter instanceof HTMLElement
      && presenter.id === 'wordPresentationPresenter'
      && presenter.classList.contains('is-powerpoint-slide-mode')
      && powerpointSplitToolStrip instanceof HTMLElement
      ? powerpointSplitToolStrip : null;
  }
  function syncPowerPointSplitProxyButtons() {
    const presenter = splitPresenter;
    const strip = powerPointSplitToolStripFor(presenter);
    if (!(strip instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return;
    const sourceIds = [
      'wordPresentationWhiteboardSplitBtn',
      'cv7991MagicWheelBtn',
      'wordPresentationPrevBtn',
      'wordPresentationNextBtn',
      'wordPresentationPasteCaptureBtn'
    ];
    sourceIds.forEach((sourceId) => {
      const source = document.getElementById(sourceId);
      if (!(source instanceof HTMLButtonElement)) return;
      let proxy = strip.querySelector(`[data-mvip-powerpoint-proxy-for="${sourceId}"]`);
      if (!(proxy instanceof HTMLButtonElement)) {
        proxy = source.cloneNode(true);
        if (!(proxy instanceof HTMLButtonElement)) return;
        proxy.removeAttribute('id');
        proxy.querySelectorAll('[id]').forEach((node) => node.removeAttribute('id'));
        proxy.setAttribute('data-mvip-powerpoint-proxy-for', sourceId);
        proxy.addEventListener('click', (event) => {
          event.preventDefault();
          event.stopPropagation();
          const original = document.getElementById(sourceId);
          if (original instanceof HTMLButtonElement && !original.disabled) original.click();
          requestAnimationFrame(syncPowerPointSplitProxyButtons);
        });
        strip.appendChild(proxy);
      }
      proxy.className = `${source.className} mvip-powerpoint-split-control-proxy`.trim();
      proxy.hidden = source.hidden;
      proxy.disabled = source.disabled;
      ['title', 'aria-label', 'aria-pressed', 'aria-expanded'].forEach((name) => {
        const value = source.getAttribute(name);
        if (value == null) proxy.removeAttribute(name);
        else proxy.setAttribute(name, value);
      });
      if (proxy.innerHTML !== source.innerHTML) proxy.innerHTML = source.innerHTML;
    });
    strip.hidden = false;
    strip.removeAttribute('aria-hidden');
  }
  function clearPowerPointSplitToolStrip() {
    if (!(powerpointSplitToolStrip instanceof HTMLElement)) return;
    powerpointSplitToolStrip.querySelectorAll('.mvip-powerpoint-split-control-proxy')
      .forEach((proxy) => proxy.remove());
    powerpointSplitToolStrip.hidden = true;
    powerpointSplitToolStrip.setAttribute('aria-hidden', 'true');
  }
  function ensureSplitInkDockAtTop(presenter) {
    if (!(presenter instanceof HTMLElement)) return false;
    moveInkDockToTop(presenter);
    const dockId = presenter.id === 'singleExamPresenter'
      ? 'singleExamSideInkDock' : 'wordPresentationSideInkDock';
    const dock = document.getElementById(dockId);
    const actions = splitToolbarActions(presenter);
    if (!(dock instanceof HTMLElement) || !(actions instanceof HTMLElement)) return false;
    const powerpointStrip = powerPointSplitToolStripFor(presenter);
    const target = powerpointStrip instanceof HTMLElement ? powerpointStrip : actions;
    if (powerpointStrip instanceof HTMLElement) syncPowerPointSplitProxyButtons();
    if (dock.parentElement !== target) target.appendChild(dock);
    dock.hidden = false;
    dock.removeAttribute('aria-hidden');
    dock.removeAttribute('inert');
    dock.removeAttribute('data-mvip-split-force-hidden');
    dock.setAttribute('data-mvip-split-force-visible', 'true');
    /* Các nút chính phải hiện ngay cả khi dock được tạo muộn sau lúc mở
       PowerPoint. Riêng nút cỡ tẩy và các menu vẫn theo trạng thái công cụ. */
    dock.querySelectorAll([
      '[data-side-ink-tool]',
      '.cv7991-side-ink-color-config',
      '.cv7991-side-geometry-tool',
      '.cv7991-side-ink-undo',
      '.cv7991-side-ink-clear',
      '.mvip-split-left-capture-btn'
    ].join(',')).forEach((button) => {
      if (!(button instanceof HTMLElement)) return;
      button.hidden = false;
      button.removeAttribute('aria-hidden');
      button.removeAttribute('inert');
      button.removeAttribute('data-mvip-split-force-hidden');
    });
    return true;
  }
  function splitToolbarActions(presenter) {
    if (!(presenter instanceof HTMLElement)) return null;
    const toolbar = presenter.querySelector(
      presenter.id === 'singleExamPresenter' ? '.single-exam-toolbar' : '.word-presentation-toolbar'
    );
    return toolbar && toolbar.querySelector(
      presenter.id === 'singleExamPresenter' ? '.single-exam-toolbar-actions' : '.word-presentation-actions'
    );
  }
  function allowedSplitControlIds(presenter) {
    return new Set(presenter.id === 'singleExamPresenter'
      ? ['singleExamWhiteboardSplitBtn', 'cv7991SingleMagicWheelBtn', 'regularTestPrevBtn', 'regularTestNextBtn', 'singleExamSideInkDock',
         'singleExamSplitCaptureBtn', 'singleExamPasteCaptureBtn']
      : ['wordPresentationWhiteboardSplitBtn', 'cv7991MagicWheelBtn', 'wordPresentationPrevBtn', 'wordPresentationNextBtn', 'wordPresentationSideInkDock',
         'wordPresentationSplitCaptureBtn', 'wordPresentationPasteCaptureBtn']);
  }
  function rememberSplitControl(control) {
    if (!(control instanceof HTMLElement) || splitControlOrigins.has(control)) return;
    splitControlOrigins.set(control, {
      hidden:control.hidden,
      hadAriaHidden:control.hasAttribute('aria-hidden'),
      ariaHidden:control.getAttribute('aria-hidden'),
      hadInert:control.hasAttribute('inert'),
      inert:!!control.inert
    });
  }
  function enforceSplitToolbarControls(presenter) {
    const actions = splitToolbarActions(presenter);
    if (!(actions instanceof HTMLElement)) return;
    const allowed = allowedSplitControlIds(presenter);
    Array.from(actions.children).forEach((control) => {
      if (!(control instanceof HTMLElement)) return;
      rememberSplitControl(control);
      const isPaste = control.id === 'wordPresentationPasteCaptureBtn' || control.id === 'singleExamPasteCaptureBtn';
      const keep = (allowed.has(control.id) || control.classList.contains('mvip-system-clock'))
        && (!isPaste || control.getAttribute('data-mvip-capture-ready') === 'true');
      if (keep) {
        if (control.hidden) control.hidden = false;
        if (control.hasAttribute('aria-hidden')) control.removeAttribute('aria-hidden');
        if (control.hasAttribute('inert')) control.removeAttribute('inert');
        if (control.hasAttribute('data-mvip-split-force-hidden')) control.removeAttribute('data-mvip-split-force-hidden');
      } else {
        if (!control.hidden) control.hidden = true;
        if (control.getAttribute('aria-hidden') !== 'true') control.setAttribute('aria-hidden', 'true');
        if (!control.hasAttribute('inert')) control.setAttribute('inert', '');
        if (control.getAttribute('data-mvip-split-force-hidden') !== 'true') {
          control.setAttribute('data-mvip-split-force-hidden', 'true');
        }
      }
    });
  }
  function lockSplitToolbarControls(presenter) {
    if (splitControlObserver) splitControlObserver.disconnect();
    enforceSplitToolbarControls(presenter);
    const actions = splitToolbarActions(presenter);
    if (!(actions instanceof HTMLElement)) return;
    splitControlObserver = new MutationObserver(() => enforceSplitToolbarControls(presenter));
    splitControlObserver.observe(actions, {
      childList:true,
      attributes:true,
      attributeFilter:['hidden'],
      subtree:false
    });
  }
  function restoreSplitToolbarControls() {
    if (splitControlObserver) splitControlObserver.disconnect();
    splitControlObserver = null;
    splitControlOrigins.forEach((origin, control) => {
      if (!(control instanceof HTMLElement)) return;
      control.hidden = origin.hidden;
      if (origin.hadAriaHidden) control.setAttribute('aria-hidden', origin.ariaHidden === null ? '' : origin.ariaHidden);
      else control.removeAttribute('aria-hidden');
      if (origin.hadInert) {
        control.setAttribute('inert', '');
        control.inert = origin.inert;
      } else {
        control.removeAttribute('inert');
      }
      control.removeAttribute('data-mvip-split-force-hidden');
    });
    splitControlOrigins.clear();
  }
  function restoreInkDocks() {
    dockOrigins.forEach((origin, dock) => {
      dock.querySelectorAll('[data-mvip-capture-presenter]').forEach((button) => {
        if (!(button instanceof HTMLElement)) return;
        button.hidden = false;
        button.setAttribute('aria-pressed', 'false');
        button.removeAttribute('aria-hidden');
        button.removeAttribute('inert');
        button.removeAttribute('data-mvip-split-force-hidden');
      });
      dock.classList.remove('mvip-split-horizontal-ink-dock');
      dock.removeAttribute('data-mvip-split-force-visible');
      if (!(origin.parent instanceof Node)) return;
      if (origin.next instanceof Node && origin.next.parentNode === origin.parent) origin.parent.insertBefore(dock, origin.next);
      else origin.parent.appendChild(dock);
    });
    dockOrigins.clear();
  }
  function paintSharedToolUi(tool) {
    if (!(splitPresenter instanceof HTMLElement)) return;
    splitPresenter.querySelectorAll('[data-side-ink-tool], [data-ink-tool]').forEach((button) => {
      const value = button.getAttribute('data-side-ink-tool') || button.getAttribute('data-ink-tool') || '';
      button.setAttribute('aria-pressed', value === tool ? 'true' : 'false');
      if (button.getAttribute('role') === 'menuitemradio') button.setAttribute('aria-checked', value === tool ? 'true' : 'false');
    });
    panel.querySelectorAll('[data-whiteboard-native-tool]').forEach((button) => {
      button.setAttribute('aria-pressed', button.getAttribute('data-whiteboard-native-tool') === tool ? 'true' : 'false');
    });
    splitPresenter.querySelectorAll('.cv7991-side-ink-eraser-config').forEach((button) => { button.hidden = tool !== 'eraser'; });
  }
  function setSharedInkTool(value) {
    const tool = String(value || '');
    if (!SHARED_INK_TOOLS.has(tool) || !(splitPresenter instanceof HTMLElement) || panel.hidden || syncingInkTool) return tool;
    const leftApi = leftInkApi();
    const rightApi = window.mvipWhiteboardInkTool;
    syncingInkTool = true;
    try {
      /* geometry.tool('') luôn gọi api.tool('cursor'). Vì vậy phải tắt công cụ
         hình học TRƯỚC, rồi mới đặt công cụ bút/tẩy/laze mong muốn cho hai
         canvas. Thứ tự ngược lại chỉ làm nút sáng nhưng canvas vẫn là con trỏ. */
      const leftGeometry = leftGeometryApi();
      if (leftGeometry && typeof leftGeometry.tool === 'function') leftGeometry.tool('');
      const rightGeometry = window.mvipWhiteboardGeometryTool;
      if (rightGeometry && typeof rightGeometry.tool === 'function') rightGeometry.tool('');
      if (leftApi && typeof leftApi.tool === 'function') leftApi.tool(tool);
      if (rightApi && typeof rightApi.tool === 'function') rightApi.tool(tool);
    } catch (_) {
    } finally {
      syncingInkTool = false;
    }
    paintSharedToolUi(tool);
    return tool;
  }
  function sharedToolFromButton(button) {
    if (!(button instanceof Element)) return '';
    return String(
      button.getAttribute('data-whiteboard-native-tool')
      || button.getAttribute('data-side-ink-tool')
      || button.getAttribute('data-ink-tool')
      || ''
    );
  }
  /* Gắn ngay trên từng nút ở pha capture. Vì vậy chiều phải -> trái luôn chạy
     trước các stopPropagation của xử lý cũ và không còn phụ thuộc vào việc
     sự kiện có nổi tiếp lên document hay không. */
  document.querySelectorAll(
    '#mvipWhiteboardPanel [data-whiteboard-native-tool], '
    + '#wordPresentationPresenter [data-side-ink-tool], #wordPresentationPresenter [data-ink-tool], '
    + '#singleExamPresenter [data-side-ink-tool], #singleExamPresenter [data-ink-tool]'
  ).forEach((button) => {
    button.addEventListener('click', () => {
      if (!(splitPresenter instanceof HTMLElement) || panel.hidden) return;
      const belongsToRight = panel.contains(button);
      const belongsToLeft = splitPresenter.contains(button);
      const tool = sharedToolFromButton(button);
      if ((belongsToRight || belongsToLeft) && SHARED_INK_TOOLS.has(tool)) setSharedInkTool(tool);
    }, true);
  });
  function scheduleLayout() {
    if (layoutFrame) cancelAnimationFrame(layoutFrame);
    layoutFrame = requestAnimationFrame(() => { layoutFrame = 0; layoutSplit(); });
  }
  function syncBoardSizeButton() {
    if (!(sizeBtn instanceof HTMLButtonElement)) return;
    const expanded = panel.classList.contains('is-split') && panel.classList.contains('is-board-fullscreen');
    const powerPointExpanded = expanded
      && splitPresenter instanceof HTMLElement
      && splitPresenter.id === 'wordPresentationPresenter'
      && splitPresenter.classList.contains('is-powerpoint-slide-mode');
    document.body.classList.toggle('mvip-powerpoint-whiteboard-fullscreen', powerPointExpanded);
    sizeBtn.innerHTML = expanded ? SHRINK_BOARD_ICON : EXPAND_BOARD_ICON;
    sizeBtn.setAttribute('aria-pressed', expanded ? 'true' : 'false');
    sizeBtn.title = expanded
      ? 'Thu nhỏ bảng trắng về chia đôi màn hình'
      : 'Phóng bảng trắng toàn màn hình';
    sizeBtn.setAttribute('aria-label', sizeBtn.title);
  }
  function setBoardFullscreen(expanded) {
    if (!(splitPresenter instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return false;
    setSharedCaptureMode(false);
    showWhiteboard();
    panel.classList.toggle('is-board-fullscreen', !!expanded);
    syncBoardSizeButton();
    scheduleLayout();
    refreshSplitPresenterFit();
    requestAnimationFrame(() => {
      try { sizeBtn && sizeBtn.focus({ preventScroll:true }); } catch (_) {}
    });
    return panel.classList.contains('is-board-fullscreen');
  }
  /* Việc chuyển sang fullscreen hoàn tất bất đồng bộ ở mỗi trình duyệt.
     Căn lại vài nhịp ngắn để slide luôn dùng đúng nửa trái sau khi thanh địa chỉ,
     thanh tab và khung fullscreen đã ổn định kích thước. */
  function refreshSplitPresenterFit() {
    [60, 180, 420, 800].forEach((delay) => setTimeout(() => {
      if (!(splitPresenter instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return;
      window.dispatchEvent(new Event('resize'));
    }, delay));
  }
  function layoutSplit() {
    if (!(splitPresenter instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return;
    const rect = splitPresenter.getBoundingClientRect();
    const leftWidth = Math.max(1, Math.round(rect.width / 2));
    const rightWidth = Math.max(1, Math.round(rect.width - leftWidth));
    splitPresenter.style.setProperty('--mvip-whiteboard-split-left', `${leftWidth}px`);
    const boardFullscreen = panel.classList.contains('is-board-fullscreen');
    panel.style.left = `${Math.round(boardFullscreen ? rect.left : rect.left + leftWidth)}px`;
    panel.style.top = `${Math.round(rect.top)}px`;
    panel.style.right = 'auto'; panel.style.bottom = 'auto';
    panel.style.width = `${boardFullscreen ? Math.max(1, Math.round(rect.width)) : rightWidth}px`;
    panel.style.height = `${Math.max(1, Math.round(rect.height))}px`;
    syntheticResize = true;
    window.dispatchEvent(new Event('resize'));
    syntheticResize = false;
    requestAnimationFrame(constrainTemporaryPaste);
  }
  function mountInFullscreenHost() {
    const full = document.fullscreenElement || document.webkitFullscreenElement || null;
    const host = full instanceof HTMLElement ? full : document.body;
    if (panel.parentElement !== host) {
      const memory = window.mvipWhiteboardViewportMemory;
      if (!panel.hidden && memory && typeof memory.remember === 'function') memory.remember();
      host.appendChild(panel);
      requestAnimationFrame(() => {
        const currentMemory = window.mvipWhiteboardViewportMemory;
        if (currentMemory && typeof currentMemory.restore === 'function') currentMemory.restore();
      });
    }
  }
  function routeImageZoomToRightPane() {
    if (!(imageZoomModal instanceof HTMLElement) || imageZoomModal.hidden
        || !(splitPresenter instanceof HTMLElement) || panel.hidden || !panel.classList.contains('is-split')) return;
    if (imageZoomModal.parentElement !== panel) panel.appendChild(imageZoomModal);
    requestAnimationFrame(() => window.dispatchEvent(new Event('resize')));
  }
  function positionLeftCaptureOverlay(capture) {
    if (!capture || !(capture.host instanceof HTMLElement)
        || !(capture.overlay instanceof HTMLElement)) return false;
    const hostRect = capture.host.getBoundingClientRect();
    const offsetWidth = Math.max(1, Number(capture.host.offsetWidth) || hostRect.width || 1);
    const offsetHeight = Math.max(1, Number(capture.host.offsetHeight) || hostRect.height || 1);
    const scaleX = Math.max(.01, hostRect.width / offsetWidth);
    const scaleY = Math.max(.01, hostRect.height / offsetHeight);
    const viewportWidth = Math.max(1, Number(capture.host.clientWidth) || offsetWidth);
    const viewportHeight = Math.max(1, Number(capture.host.clientHeight) || offsetHeight);
    /* Lớp chọn phải bám vào khung NHÌN THẤY, không bám vào đầu vùng nội dung
       cuộn. Dùng fixed và đặt theo content-box giúp vẫn chụp được sau khi kéo
       thanh cuộn xuống dưới; phép scale giữ đúng cả khi khung bị co đồng dạng. */
    capture.overlay.style.position = 'fixed';
    capture.overlay.style.inset = 'auto';
    capture.overlay.style.left = `${hostRect.left + (Number(capture.host.clientLeft) || 0) * scaleX}px`;
    capture.overlay.style.top = `${hostRect.top + (Number(capture.host.clientTop) || 0) * scaleY}px`;
    capture.overlay.style.width = `${viewportWidth}px`;
    capture.overlay.style.height = `${viewportHeight}px`;
    capture.overlay.style.transformOrigin = '0 0';
    capture.overlay.style.transform = `scale(${scaleX}, ${scaleY})`;
    capture.viewportWidth = viewportWidth;
    capture.viewportHeight = viewportHeight;
    capture.viewportScaleX = scaleX;
    capture.viewportScaleY = scaleY;
    return true;
  }
  function leftCapturePoint(event, capture) {
    const rect = capture.overlay.getBoundingClientRect();
    const width = Math.max(1, Number(capture.viewportWidth) || Number(capture.host.clientWidth) || rect.width || 1);
    const height = Math.max(1, Number(capture.viewportHeight) || Number(capture.host.clientHeight) || rect.height || 1);
    const scaleX = Math.max(.01, rect.width / width);
    const scaleY = Math.max(.01, rect.height / height);
    return {
      x:Math.max(0, Math.min((Number(event.clientX) - rect.left) / scaleX, width)),
      y:Math.max(0, Math.min((Number(event.clientY) - rect.top) / scaleY, height))
    };
  }
  function leftCaptureRect(start, end) {
    return {
      left:Math.min(start.x, end.x), top:Math.min(start.y, end.y),
      width:Math.abs(end.x - start.x), height:Math.abs(end.y - start.y)
    };
  }
  function paintLeftCaptureSelection(capture, rect) {
    capture.selection.style.left = `${rect.left}px`; capture.selection.style.top = `${rect.top}px`;
    capture.selection.style.width = `${rect.width}px`; capture.selection.style.height = `${rect.height}px`;
  }
  function cancelLeftCapture() {
    const capture = leftCaptureState;
    if (!capture) return false;
    leftCaptureState = null;
    if (capture.pointerId != null) {
      try { capture.overlay.releasePointerCapture(capture.pointerId); } catch (_) {}
    }
    capture.overlay.remove();
    capture.button.disabled = false;
    capture.button.setAttribute('aria-pressed', 'false');
    capture.button.title = capture.idleTitle || 'Chụp vùng màn hình';
    return true;
  }
  function canvasToPngBlob(canvas) {
    return new Promise((resolve) => {
      try { canvas.toBlob(resolve, 'image/png'); } catch (_) { resolve(null); }
    });
  }
  function waitForCleanCaptureFrame() {
    return new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)));
  }
  function tryCopyPngBlob(blob) {
    if (!(blob instanceof Blob) || !navigator.clipboard || typeof navigator.clipboard.write !== 'function'
        || typeof ClipboardItem !== 'function') return Promise.resolve(false);
    try {
      return navigator.clipboard.write([new ClipboardItem({ 'image/png':blob })]).then(() => true, () => false);
    } catch (_) { return Promise.resolve(false); }
  }
  function captureObjectPosition(value, freeSpace) {
    const text = String(value || '50%').trim().toLowerCase();
    if (text === 'left' || text === 'top') return 0;
    if (text === 'right' || text === 'bottom') return freeSpace;
    if (text === 'center') return freeSpace / 2;
    const calc = text.match(/^calc\(\s*(-?[\d.]+)%\s*([+-])\s*([\d.]+)px\s*\)$/);
    if (calc) return freeSpace * Number(calc[1]) / 100 + (calc[2] === '-' ? -1 : 1) * Number(calc[3]);
    if (/%$/.test(text)) return freeSpace * (parseFloat(text) || 0) / 100;
    return parseFloat(text) || 0;
  }

  function prepareCaptureImages(host, selection, pixelScale) {
    const entries = [];
    const token = `capture${Date.now()}${Math.floor(Math.random() * 100000)}`;
    host.querySelectorAll('img').forEach((image, index) => {
      if (!image.complete || !image.naturalWidth || !image.naturalHeight) return;
      const style = getComputedStyle(image);
      const fit = style.objectFit || 'fill';
      if (fit === 'fill' || style.display === 'none' || style.visibility === 'hidden') return;
      const bounds = image.getBoundingClientRect();
      if (bounds.right <= selection.left || bounds.left >= selection.right
        || bounds.bottom <= selection.top || bounds.top >= selection.bottom) return;
      const px = (name) => parseFloat(style.getPropertyValue(name)) || 0;
      const insetX = px('padding-left') + px('padding-right') + px('border-left-width') + px('border-right-width');
      const insetY = px('padding-top') + px('padding-bottom') + px('border-top-width') + px('border-bottom-width');
      const width = Math.max(1, (parseFloat(style.width) || image.offsetWidth)
        - (style.boxSizing === 'border-box' ? insetX : 0));
      const height = Math.max(1, (parseFloat(style.height) || image.offsetHeight)
        - (style.boxSizing === 'border-box' ? insetY : 0));
      let ratio = 1;
      if (fit === 'contain' || fit === 'scale-down') ratio = Math.min(width / image.naturalWidth, height / image.naturalHeight);
      else if (fit === 'cover') ratio = Math.max(width / image.naturalWidth, height / image.naturalHeight);
      if (fit === 'scale-down') ratio = Math.min(1, ratio);
      const drawnWidth = image.naturalWidth * ratio;
      const drawnHeight = image.naturalHeight * ratio;
      const position = String(style.objectPosition || '50% 50%').match(/calc\([^)]*\)|[^\s]+/g) || [];
      const left = captureObjectPosition(position[0], width - drawnWidth);
      const top = captureObjectPosition(position[1], height - drawnHeight);
      try {
        // Bake only the image's painted pixels into its existing content box.
        // html2canvas can then draw it without stretching contain/cover images;
        // its original DOM position, clipping and stacking order stay intact.
        const resolution = Math.max(.01, Math.min(pixelScale * bounds.width / width, 4096 / width, 4096 / height));
        const canvas = document.createElement('canvas');
        canvas.width = Math.max(1, Math.ceil(width * resolution));
        canvas.height = Math.max(1, Math.ceil(height * resolution));
        const context = canvas.getContext('2d');
        if (!context) return;
        context.setTransform(canvas.width / width, 0, 0, canvas.height / height, 0, 0);
        context.drawImage(image, left, top, drawnWidth, drawnHeight);
        const src = canvas.toDataURL('image/png');
        const marker = `${token}-${index}`;
        entries.push({ image, canvas, src, width, height, marker, previous:image.getAttribute('data-mvip-capture-image') });
        image.setAttribute('data-mvip-capture-image', marker);
      } catch (_) { /* A cross-origin image can still use the renderer's CORS path. */ }
    });
    return entries;
  }

  function applyCaptureImages(clonedDocument, entries) {
    entries.forEach((entry) => {
      const image = clonedDocument.querySelector(`[data-mvip-capture-image="${entry.marker}"]`);
      // html2canvas adopts nodes from the source window into its iframe.
      // Adoption keeps their original prototype, so instanceof against the
      // iframe's HTMLImageElement rejects valid images and skips object-fit.
      if (!image || image.nodeType !== 1 || image.localName !== 'img') return;
      image.removeAttribute('srcset');
      image.removeAttribute('sizes');
      image.src = entry.src;
      Object.entries({
        width:`${entry.width}px`, height:`${entry.height}px`,
        'box-sizing':'content-box', 'min-width':'0', 'min-height':'0',
        'max-width':'none', 'max-height':'none', 'object-fit':'fill', 'object-position':'0 0'
      }).forEach(([name, value]) => image.style.setProperty(name, value, 'important'));
    });
  }

  function restoreCaptureImageMarkers(entries) {
    entries.forEach(({ image, marker, previous }) => {
      if (image.getAttribute('data-mvip-capture-image') !== marker) return;
      if (previous == null) image.removeAttribute('data-mvip-capture-image');
      else image.setAttribute('data-mvip-capture-image', previous);
    });
  }

  async function captureLeftRegion(capture, rect) {
    const button = capture.button;
    button.disabled = true;
    button.title = 'Đang tạo ảnh vùng đã chọn…';
    const html2canvas = window.html2canvas;
    if (typeof html2canvas !== 'function') {
      button.disabled = false;
      button.title = 'Không tải được bộ chụp màn hình';
      return false;
    }
    let captureImages = [];
    capture.host.classList.add('mvip-split-capture-rendering', 'mvip-clean-capture-source');
    try {
      /* Xóa mọi lớp chọn vùng cũ còn sót lại rồi chờ trình duyệt vẽ một khung
         sạch. Những lớp này đều chỉ là giao diện hỗ trợ, không phải nội dung. */
      capture.host.querySelectorAll(
        '.mvip-split-left-capture-overlay, .mvip-split-left-capture-selection, '
        + '.word-presentation-region-overlay, .word-presentation-region-selection-box, '
        + '.single-exam-region-overlay, .single-exam-region-selection-box'
      ).forEach((element) => element.remove());
      await waitForCleanCaptureFrame();
      const hostBounds = capture.host.getBoundingClientRect();
      const hostOffsetWidth = Math.max(1, Number(capture.host.offsetWidth) || hostBounds.width || 1);
      const hostOffsetHeight = Math.max(1, Number(capture.host.offsetHeight) || hostBounds.height || 1);
      const metrics = {
        width:Math.max(1, Number(capture.viewportWidth) || Number(capture.host.clientWidth) || hostOffsetWidth),
        height:Math.max(1, Number(capture.viewportHeight) || Number(capture.host.clientHeight) || hostOffsetHeight),
        scaleX:Math.max(.01, hostBounds.width / hostOffsetWidth),
        scaleY:Math.max(.01, hostBounds.height / hostOffsetHeight)
      };
      const captureScrollLeft = Math.max(0, Number(capture.host.scrollLeft) || 0);
      const captureScrollTop = Math.max(0, Number(capture.host.scrollTop) || 0);
      const captureScale = Math.max(1, Math.min(2, Number(devicePixelRatio) || 1));
      const safeLeft = Math.max(0, Math.min(metrics.width - 1, Number(rect.left) || 0));
      const safeTop = Math.max(0, Math.min(metrics.height - 1, Number(rect.top) || 0));
      const safeWidth = Math.max(1, Math.min(Number(rect.width) || 1, metrics.width - safeLeft));
      const safeHeight = Math.max(1, Math.min(Number(rect.height) || 1, metrics.height - safeTop));
      const visualLeft = ((Number(capture.host.clientLeft) || 0) + safeLeft) * metrics.scaleX;
      const visualTop = ((Number(capture.host.clientTop) || 0) + safeTop) * metrics.scaleY;
      const visualWidth = safeWidth * metrics.scaleX;
      const visualHeight = safeHeight * metrics.scaleY;
      /* Word/PDF/Excel thông thường có thể dùng CSS zoom ở sâu trong cây nội
         dung. Cắt trực tiếp từ cây tài liệu đầy đủ sẽ làm html2canvas quy đổi
         theo kích thước trước khi zoom: chữ bị thu nhỏ và giãn khoảng cách.
         Vì vậy vẫn dựng đúng viewport đang nhìn thấy; trong bản sao, đưa lớp
         tài liệu về vị trí cuộn hiện tại bằng phép tịnh tiến thủ công. */
      const ordinaryPresenter = capture.presenterId === 'wordPresentationPresenter'
        ? document.getElementById('wordPresentationPresenter') : null;
      const ordinaryRootCandidate = ordinaryPresenter instanceof HTMLElement
        && ordinaryPresenter.classList.contains('is-ordinary-document')
        && !ordinaryPresenter.classList.contains('is-powerpoint-slide-mode')
        ? capture.host.querySelector('.ordinary-document-page-host') : null;
      const ordinaryCapture = ordinaryRootCandidate instanceof HTMLElement;
      /* Giữ tham chiếu tới các lớp ảnh thật. html2canvas đôi khi chỉ dựng
         được một phần ảnh nằm trong trang Word đang CSS zoom; sau khi cắt
         viewport, các lớp này sẽ được ghép lại trực tiếp từ nguồn ảnh/canvas
         theo đúng hình chữ nhật mà người dùng đang nhìn thấy. */
      const ordinaryRasterSources = ordinaryCapture
        ? Array.from(ordinaryRootCandidate.querySelectorAll('img, canvas')).filter((element) => {
          if (element instanceof HTMLImageElement) {
            return element.complete && element.naturalWidth > 0 && element.naturalHeight > 0;
          }
          return element instanceof HTMLCanvasElement && element.width > 0 && element.height > 0;
        })
        : [];
      const ordinaryCaptureToken = ordinaryCapture
        ? `mvipOrdinaryCapture${Date.now()}${Math.floor(Math.random() * 100000)}` : '';
      if (ordinaryCapture) ordinaryRootCandidate.setAttribute(
        'data-mvip-ordinary-capture-root', ordinaryCaptureToken
      );
      captureImages = prepareCaptureImages(capture.host, {
        left:hostBounds.left + visualLeft, top:hostBounds.top + visualTop,
        right:hostBounds.left + visualLeft + visualWidth,
        bottom:hostBounds.top + visualTop + visualHeight
      }, captureScale);
      const rendered = await html2canvas(capture.host, {
        backgroundColor:'#ffffff',
        scale:captureScale,
        useCORS:true,
        allowTaint:false,
        logging:false,
        onclone:async (clonedDocument) => {
          applyCaptureImages(clonedDocument, captureImages);
          await Promise.all(captureImages.map((entry) => {
            const image = clonedDocument.querySelector(`[data-mvip-capture-image="${entry.marker}"]`);
            return image && typeof image.decode === 'function' ? image.decode().catch(() => {}) : Promise.resolve();
          }));
          clonedDocument.querySelectorAll(
            '[data-html2canvas-ignore="true"], '
            + '.mvip-split-left-capture-overlay, .mvip-split-left-capture-selection, '
            + '.word-presentation-region-overlay, .word-presentation-region-selection-box, '
            + '.single-exam-region-overlay, .single-exam-region-selection-box'
          ).forEach((element) => element.remove());
          const cleanStyle = clonedDocument.createElement('style');
          cleanStyle.textContent = `
            .mvip-clean-capture-source,
            .mvip-clean-capture-source *,
            .mvip-clean-capture-source *::before,
            .mvip-clean-capture-source *::after {
              box-shadow:none !important;
              -webkit-box-shadow:none !important;
            }
            .mvip-clean-capture-source [class*="region-overlay"],
            .mvip-clean-capture-source [class*="selection-box"],
            .mvip-clean-capture-source [class*="capture-overlay"],
            .mvip-clean-capture-source [class*="capture-selection"] {
              display:none !important;
            }
          `;
          (clonedDocument.head || clonedDocument.documentElement).appendChild(cleanStyle);
          const clonedHost = capture.host.id ? clonedDocument.getElementById(capture.host.id) : null;
          const clonedOrdinaryRoot = ordinaryCaptureToken
            ? clonedDocument.querySelector(`[data-mvip-ordinary-capture-root="${ordinaryCaptureToken}"]`)
            : null;
          if (clonedHost && clonedHost.style) {
            clonedHost.style.setProperty('background', '#fff', 'important');
            clonedHost.style.setProperty('scroll-behavior', 'auto', 'important');
            if (ordinaryCapture && clonedOrdinaryRoot && clonedOrdinaryRoot.style) {
              /* Thuộc tính scroll của DOM sao chép không được html2canvas áp
                 dụng ổn định. Đặt scroll về 0 rồi dịch nguyên lớp nội dung sẽ
                 giữ đúng cả vị trí lẫn CSS zoom mà người dùng đang nhìn. */
              clonedHost.scrollLeft = 0;
              clonedHost.scrollTop = 0;
              clonedHost.style.setProperty('overflow', 'hidden', 'important');
              /* html2canvas không vẽ ổn định thuộc tính CSS zoom (tọa độ đã
                 phóng nhưng cỡ chữ vẫn nhỏ). Chuyển riêng các lớp đang zoom
                 sang transform:scale và khóa đúng vị trí/kích thước trực quan
                 của chúng trong DOM sao chép. Việc này không đụng vào tài liệu
                 thật và giữ nguyên tỷ lệ chữ, bảng, công thức khi Paste. */
              const zoomedEntries = Array.from(clonedOrdinaryRoot.querySelectorAll('*'))
                .filter((element) => {
                  const zoomValue = Number.parseFloat(element.style && element.style.zoom);
                  return Number.isFinite(zoomValue) && zoomValue > 0
                    && Math.abs(zoomValue - 1) > .0001 && element.parentElement;
                })
                .map((element) => {
                  const parent = element.parentElement;
                  const bounds = element.getBoundingClientRect();
                  const parentBounds = parent.getBoundingClientRect();
                  const fallbackBounds = clonedHost.getBoundingClientRect();
                  const parentScaleX = Math.max(.01,
                    Number(parent.offsetWidth) > 0
                      ? parentBounds.width / Number(parent.offsetWidth)
                      : fallbackBounds.width / Math.max(1, Number(clonedHost.offsetWidth) || 1));
                  const parentScaleY = Math.max(.01,
                    Number(parent.offsetHeight) > 0
                      ? parentBounds.height / Number(parent.offsetHeight)
                      : fallbackBounds.height / Math.max(1, Number(clonedHost.offsetHeight) || 1));
                  return {
                    element,
                    parent,
                    zoom:Math.max(.01, Number.parseFloat(element.style.zoom) || 1),
                    left:(bounds.left - parentBounds.left) / parentScaleX,
                    top:(bounds.top - parentBounds.top) / parentScaleY,
                    parentHeight:parentBounds.height / parentScaleY
                  };
                });
              const sizedParents = new Set();
              zoomedEntries.forEach((entry) => {
                if (!sizedParents.has(entry.parent)) {
                  sizedParents.add(entry.parent);
                  entry.parent.style.setProperty('position', 'relative', 'important');
                  entry.parent.style.setProperty(
                    'height', `${Math.max(1, entry.parentHeight)}px`, 'important'
                  );
                }
                entry.element.style.setProperty('zoom', '1', 'important');
                entry.element.style.setProperty('position', 'absolute', 'important');
                entry.element.style.setProperty('left', `${entry.left}px`, 'important');
                entry.element.style.setProperty('top', `${entry.top}px`, 'important');
                entry.element.style.setProperty('transform-origin', '0 0', 'important');
                entry.element.style.setProperty(
                  'transform', `scale(${entry.zoom})`, 'important'
                );
              });
              clonedOrdinaryRoot.style.setProperty('transform-origin', '0 0', 'important');
              clonedOrdinaryRoot.style.setProperty(
                'transform',
                `translate(${-captureScrollLeft}px, ${-captureScrollTop}px)`,
                'important'
              );
            } else {
              clonedHost.scrollLeft = captureScrollLeft;
              clonedHost.scrollTop = captureScrollTop;
            }
          }
          if (clonedOrdinaryRoot && clonedOrdinaryRoot.style) {
            clonedOrdinaryRoot.classList.add('mvip-clean-capture-source');
            clonedOrdinaryRoot.style.setProperty('background', '#fff', 'important');
          }
        },
        ignoreElements:(element) => element.classList && (
          element.classList.contains('mvip-split-left-capture-overlay')
          || element.classList.contains('mvip-split-left-capture-selection')
          || element.classList.contains('word-presentation-region-overlay')
          || element.classList.contains('single-exam-region-overlay')
          || element.classList.contains('mvip-left-paste-resize-handle')
          || element.classList.contains('mvip-pasted-image-close')
        )
      });
      if (ordinaryCapture) ordinaryRootCandidate.removeAttribute('data-mvip-ordinary-capture-root');
      const scaleX = rendered.width / Math.max(1, hostBounds.width);
      const scaleY = rendered.height / Math.max(1, hostBounds.height);
      const sourceLeft = Math.max(0, Math.min(rendered.width - 1, Math.floor(visualLeft * scaleX)));
      const sourceTop = Math.max(0, Math.min(rendered.height - 1, Math.floor(visualTop * scaleY)));
      const sourceRight = Math.max(
        sourceLeft + 1,
        Math.min(rendered.width, Math.ceil((visualLeft + visualWidth) * scaleX))
      );
      const sourceBottom = Math.max(
        sourceTop + 1,
        Math.min(rendered.height, Math.ceil((visualTop + visualHeight) * scaleY))
      );
      const sourceWidth = sourceRight - sourceLeft;
      const sourceHeight = sourceBottom - sourceTop;
      const output = document.createElement('canvas');
      output.width = sourceWidth;
      output.height = sourceHeight;
      const context = output.getContext('2d');
      if (!context) return false;
      context.fillStyle = '#ffffff';
      context.fillRect(0, 0, output.width, output.height);
      context.drawImage(
        rendered,
        sourceLeft, sourceTop, sourceWidth, sourceHeight,
        0, 0, output.width, output.height
      );
      if (ordinaryRasterSources.length) {
        const selectionScreenLeft = hostBounds.left + visualLeft;
        const selectionScreenTop = hostBounds.top + visualTop;
        const selectionScreenRight = selectionScreenLeft + visualWidth;
        const selectionScreenBottom = selectionScreenTop + visualHeight;
        ordinaryRasterSources.forEach((element) => {
          const style = getComputedStyle(element);
          if (style.display === 'none' || style.visibility === 'hidden'
              || Number.parseFloat(style.opacity) <= 0) return;
          const bounds = element.getBoundingClientRect();
          if (!(bounds.width > .01 && bounds.height > .01)) return;
          const clippedLeft = Math.max(selectionScreenLeft, bounds.left);
          const clippedTop = Math.max(selectionScreenTop, bounds.top);
          const clippedRight = Math.min(selectionScreenRight, bounds.right);
          const clippedBottom = Math.min(selectionScreenBottom, bounds.bottom);
          if (clippedRight <= clippedLeft || clippedBottom <= clippedTop) return;
          const preparedImage = captureImages.find((entry) => entry.image === element);
          const raster = preparedImage ? preparedImage.canvas : element;
          const rasterWidth = raster instanceof HTMLCanvasElement
            ? Number(raster.width) : Number(raster.naturalWidth);
          const rasterHeight = raster instanceof HTMLCanvasElement
            ? Number(raster.height) : Number(raster.naturalHeight);
          if (!(rasterWidth > 0 && rasterHeight > 0)) return;
          const rasterLeft = (clippedLeft - bounds.left) / bounds.width * rasterWidth;
          const rasterTop = (clippedTop - bounds.top) / bounds.height * rasterHeight;
          const rasterCropWidth = (clippedRight - clippedLeft) / bounds.width * rasterWidth;
          const rasterCropHeight = (clippedBottom - clippedTop) / bounds.height * rasterHeight;
          const outputLeft = (clippedLeft - selectionScreenLeft) / visualWidth * output.width;
          const outputTop = (clippedTop - selectionScreenTop) / visualHeight * output.height;
          const outputCropWidth = (clippedRight - clippedLeft) / visualWidth * output.width;
          const outputCropHeight = (clippedBottom - clippedTop) / visualHeight * output.height;
          try {
            context.save();
            context.globalAlpha = Math.max(0, Math.min(1, Number.parseFloat(style.opacity) || 1));
            context.drawImage(
              raster,
              rasterLeft, rasterTop, rasterCropWidth, rasterCropHeight,
              outputLeft, outputTop, outputCropWidth, outputCropHeight
            );
            context.restore();
          } catch (_) {
            try { context.restore(); } catch (_) {}
          }
        });
      }
      const blob = await canvasToPngBlob(output);
      if (!(blob instanceof Blob)) return false;
      try {
        document.dispatchEvent(new CustomEvent('mvip-whiteboard-capture-ready', {
          detail:{
            blob, width:output.width, height:output.height,
            cssWidth:safeWidth, cssHeight:safeHeight,
            visualWidth, visualHeight,
            source:capture.source || 'presentation', serial:Date.now()
          }
        }));
      } catch (_) {}
      const copied = await tryCopyPngBlob(blob);
      button.title = copied
        ? 'Đã chụp và sao chép ảnh. Bấm để chụp vùng khác.'
        : 'Đã chụp ảnh. Bấm Paste ở bảng trắng.';
      return true;
    } catch (_) {
      button.title = 'Không chụp được vùng đã chọn';
      return false;
    } finally {
      restoreCaptureImageMarkers(captureImages);
      capture.host.querySelectorAll('[data-mvip-ordinary-capture-root]').forEach((element) => {
        element.removeAttribute('data-mvip-ordinary-capture-root');
      });
      capture.host.classList.remove('mvip-split-capture-rendering', 'mvip-clean-capture-source');
      button.disabled = false;
    }
  }
  function startLeftCapture(button) {
    if (!(button instanceof HTMLElement)) return false;
    if (leftCaptureState) { cancelLeftCapture(); return false; }
    const presenterId = button.getAttribute('data-mvip-capture-presenter') || '';
    const explicitHostId = button.getAttribute('data-mvip-capture-host') || '';
    const presenter = presenterId ? document.getElementById(presenterId) : null;
    if (presenterId && (!(presenter instanceof HTMLElement) || presenter.hidden)) return false;
    const host = explicitHostId ? document.getElementById(explicitHostId) : pasteHostFor(presenterId);
    if (!(host instanceof HTMLElement)) return false;
    const hostRect = host.getBoundingClientRect();
    if (hostRect.width < 2 || hostRect.height < 2 || getComputedStyle(host).display === 'none') return false;
    /* Không cho nút Paste tiếp tục dùng ảnh của lần chụp trước trong khoảng
       thời gian ảnh mới đang được tạo. Nút sẽ tự hiện lại khi sự kiện
       mvip-whiteboard-capture-ready mang đúng blob mới được phát ra. */
    latestCapture = null;
    updatePasteButtons();
    const idleTitle = button.getAttribute('data-mvip-capture-idle-title') || 'Chụp vùng màn hình';
    const overlay = document.createElement('div');
    overlay.className = 'mvip-split-left-capture-overlay is-active';
    overlay.setAttribute('aria-label', 'Kéo chuột để chọn vùng cần chụp');
    overlay.setAttribute('data-html2canvas-ignore', 'true');
    const selection = document.createElement('div');
    selection.className = 'mvip-split-left-capture-selection';
    selection.setAttribute('data-html2canvas-ignore', 'true');
    overlay.appendChild(selection);
    host.appendChild(overlay);
    leftCaptureState = {
      button, host, overlay, selection, presenterId, idleTitle,
      source:button.getAttribute('data-mvip-capture-source') || 'presentation',
      pointerId:null, selecting:false, start:null, end:null
    };
    positionLeftCaptureOverlay(leftCaptureState);
    button.setAttribute('aria-pressed', 'true');
    button.title = 'Kéo chuột để chọn vùng cần chụp';
    overlay.addEventListener('pointerdown', (event) => {
      const capture = leftCaptureState;
      if (!capture || (event.pointerType === 'mouse' && event.button !== 0)) return;
      event.preventDefault(); event.stopImmediatePropagation();
      const point = leftCapturePoint(event, capture);
      capture.selecting = true; capture.pointerId = event.pointerId; capture.start = point; capture.end = point;
      overlay.classList.add('is-selecting'); paintLeftCaptureSelection(capture, leftCaptureRect(point, point));
      try { overlay.setPointerCapture(event.pointerId); } catch (_) {}
    });
    overlay.addEventListener('pointermove', (event) => {
      const capture = leftCaptureState;
      if (!capture || !capture.selecting || event.pointerId !== capture.pointerId) return;
      event.preventDefault(); event.stopImmediatePropagation();
      capture.end = leftCapturePoint(event, capture);
      paintLeftCaptureSelection(capture, leftCaptureRect(capture.start, capture.end));
    });
    const finish = (event) => {
      const capture = leftCaptureState;
      if (!capture || !capture.selecting || (event && event.pointerId !== capture.pointerId)) return;
      if (event) { event.preventDefault(); event.stopImmediatePropagation(); capture.end = leftCapturePoint(event, capture); }
      const rect = leftCaptureRect(capture.start, capture.end);
      leftCaptureState = null;
      try { overlay.releasePointerCapture(capture.pointerId); } catch (_) {}
      overlay.remove();
      button.setAttribute('aria-pressed', 'false');
      /* Trong chia đôi, hoàn tất một bên sẽ tắt chế độ chụp ở cả hai bên.
         Ngoài chia đôi (hoặc trong ảnh phóng to), chỉ tắt nút vừa dùng. */
      const isShared = !!(splitPresenter instanceof HTMLElement
        && !panel.hidden && panel.classList.contains('is-split')
        && capture.presenterId === splitPresenter.id);
      if (isShared) setSharedCaptureMode(false);
      if (rect.width >= 6 && rect.height >= 6) captureLeftRegion(capture, rect);
      else { button.disabled = false; button.title = capture.idleTitle; }
    };
    overlay.addEventListener('pointerup', finish);
    overlay.addEventListener('pointercancel', finish);
    overlay.addEventListener('lostpointercapture', () => {
      const capture = leftCaptureState;
      if (capture && capture.overlay === overlay && capture.selecting) finish();
    });
    return true;
  }
  function requestSplitFullscreen(presenter) {
    if (!(presenter instanceof HTMLElement)) return;
    const full = document.fullscreenElement || document.webkitFullscreenElement || null;
    if (full === presenter) return;
    const button = document.getElementById(
      presenter.id === 'singleExamPresenter' ? 'singleExamFullscreenBtn' : 'wordPresentationFullscreenBtn'
    );
    if (button instanceof HTMLButtonElement) {
      try { button.click(); } catch (_) {}
    }
  }
  function openSplitForPresenter(presenter) {
    if (!(presenter instanceof HTMLElement)) return false;
    lastWhiteboardPresenterId = presenter.id;
    requestSplitFullscreen(presenter);
    activateSplit(presenter);
    return true;
  }
  function presenterForWhiteboardControl(preferredId = '') {
    if (splitPresenter instanceof HTMLElement) return splitPresenter;
    const ids = ['wordPresentationPresenter', 'singleExamPresenter'];
    const full = document.fullscreenElement || document.webkitFullscreenElement || null;
    if (full instanceof Element) {
      const direct = ids.includes(full.id) ? full : null;
      if (direct instanceof HTMLElement) return direct;
      const nested = ids.map((id) => full.querySelector(`#${id}`)).find((node) => node instanceof HTMLElement);
      if (nested instanceof HTMLElement) return nested;
    }
    const visible = (node) => node instanceof HTMLElement
      && !node.hidden
      && getComputedStyle(node).display !== 'none'
      && getComputedStyle(node).visibility !== 'hidden';
    const preferred = document.getElementById(String(preferredId || lastWhiteboardPresenterId || ''));
    if (visible(preferred)) return preferred;
    const shown = ids.map((id) => document.getElementById(id)).find(visible);
    if (shown instanceof HTMLElement) return shown;
    return preferred instanceof HTMLElement
      ? preferred
      : document.getElementById('wordPresentationPresenter') || document.getElementById('singleExamPresenter');
  }
  function clearSplit() {
    if (layoutFrame) cancelAnimationFrame(layoutFrame);
    layoutFrame = 0;
    setSharedCaptureMode(false);
    cancelLeftCapture();
    clearTemporaryPaste();
    restoreSplitToolbarControls();
    restoreInkDocks();
    clearPowerPointSplitToolStrip();
    restorePaneModeButtons();
    document.body.classList.remove('mvip-whiteboard-split-open', 'mvip-powerpoint-whiteboard-fullscreen');
    document.querySelectorAll('.mvip-whiteboard-split').forEach((node) => {
      node.classList.remove('mvip-whiteboard-split');
      node.style.removeProperty('--mvip-whiteboard-split-left');
    });
    panel.classList.remove('is-split', 'is-board-fullscreen');
    if (sizeBtn instanceof HTMLButtonElement) sizeBtn.setAttribute('aria-pressed', 'false');
    panel.removeAttribute('data-split-content');
    answerLayer.hidden = true;
    rightMode = 'whiteboard';
    splitPresenter = null; updatePasteButtons(); syncButtons(); syncPaneButtons();
    requestAnimationFrame(() => window.dispatchEvent(new Event('resize')));
  }
  /* Các chế độ trình chiếu khác dùng chung presenter nhưng nằm ở script phía
     trước. Công khai đúng một hàm dọn idempotent để lúc chuyển chế độ có thể
     xóa cả trạng thái JS lẫn hình học CSS của bố cục chia đôi cũ. */
  window.mvipClearWhiteboardSplit = clearSplit;
  function activateSplit(presenter) {
    if (!(presenter instanceof HTMLElement)) return;
    clearSplit();
    lastWhiteboardPresenterId = presenter.id;
    splitPresenter = presenter;
    document.body.classList.add('mvip-whiteboard-split-open');
    presenter.classList.add('mvip-whiteboard-split');
    movePaneModeButtonsToRight(presenter);
    ensureSplitInkDockAtTop(presenter);
    lockSplitToolbarControls(presenter);
    panel.classList.remove('is-half', 'is-dragging', 'is-board-fullscreen');
    panel.classList.add('is-split');
    mountInFullscreenHost();
    panel.hidden = false;
    document.body.classList.add('mvip-whiteboard-open');
    document.querySelectorAll('.mvip-whiteboard-open-btn').forEach((button) => button.setAttribute('aria-pressed', 'true'));
    try { window.mvipWhiteboardGeometryTool && window.mvipWhiteboardGeometryTool.tool(''); } catch (_) {}
    syncBoardSizeButton();
    showWhiteboard();
    requestAnimationFrame(() => {
      const memory = window.mvipWhiteboardViewportMemory;
      if (memory && typeof memory.restore === 'function') memory.restore();
    });
    setSharedCaptureMode(false);
    const currentTool = leftInkApi() && typeof leftInkApi().tool === 'function' ? leftInkApi().tool() : 'cursor';
    setSharedInkTool(currentTool || 'cursor');
    updatePasteButtons();
    syncButtons(); scheduleLayout(); refreshSplitPresenterFit();
    /* Dock PowerPoint và nút hình học có thể được dựng sau presenter. Kiểm
       tra lại vài nhịp ngắn để bộ công cụ bên trái không phụ thuộc thời điểm
       tải thư viện hay tốc độ máy. */
    [0, 80, 220, 520, 1200].forEach((delay) => setTimeout(() => {
      if (splitPresenter !== presenter || panel.hidden || !panel.classList.contains('is-split')) return;
      ensureSplitInkDockAtTop(presenter);
      enforceSplitToolbarControls(presenter);
    }, delay));
  }
  function toggleSplit(presenterId) {
    const presenter = document.getElementById(presenterId);
    if (!(presenter instanceof HTMLElement)) return;
    const sameActive = splitPresenter === presenter && panel.classList.contains('is-split') && !panel.hidden;
    if (sameActive) {
      if (closeBtn instanceof HTMLButtonElement) closeBtn.click();
      else { clearSplit(); panel.hidden = true; }
      return;
    }
    openSplitForPresenter(presenter);
  }

  splitButtons.forEach((button) => button.addEventListener('click', (event) => {
    event.preventDefault(); event.stopPropagation();
    toggleSplit(button.getAttribute('data-mvip-whiteboard-split-presenter') || '');
  }));
  pasteButtons.forEach((button) => button.addEventListener('click', (event) => {
    event.preventDefault(); event.stopPropagation();
    const presenterId = button.getAttribute('data-mvip-paste-presenter') || '';
    if (!(splitPresenter instanceof HTMLElement) || splitPresenter.id !== presenterId || panel.hidden) return;
    showTemporaryPaste(presenterId);
  }));
  splitCaptureButtons.forEach((button) => button.addEventListener('click', (event) => {
    event.preventDefault(); event.stopPropagation();
    const presenterId = button.getAttribute('data-mvip-capture-presenter') || '';
    const isShared = !!(splitPresenter instanceof HTMLElement
      && splitPresenter.id === presenterId && !panel.hidden && panel.classList.contains('is-split'));
    if (isShared) {
      const api = whiteboardCaptureApi();
      const boardActive = !!(api && typeof api.isActive === 'function' && api.isActive());
      setSharedCaptureMode(!(sharedCaptureMode || leftCaptureState || boardActive));
      return;
    }
    if (leftCaptureState) cancelLeftCapture();
    else startLeftCapture(button);
  }));
  if (imageZoomCaptureBtn instanceof HTMLButtonElement) {
    imageZoomCaptureBtn.addEventListener('click', (event) => {
      event.preventDefault(); event.stopPropagation();
      if (sharedCaptureMode) {
        setSharedCaptureMode(false);
        startLeftCapture(imageZoomCaptureBtn);
      } else if (leftCaptureState) cancelLeftCapture();
      else startLeftCapture(imageZoomCaptureBtn);
    });
  }
  whiteboardPasteBtn.addEventListener('click', (event) => {
    event.preventDefault(); event.stopPropagation();
    if (!latestCapture || !(latestCapture.blob instanceof Blob)) return;
    if (rightMode === 'answer') showWhiteboard();
    showWhiteboardPaste();
  });
  const whiteboardClearBtn = document.getElementById('mvipWhiteboardClearBtn');
  if (whiteboardClearBtn) whiteboardClearBtn.addEventListener('click', () => {
    document.querySelectorAll('.mvip-whiteboard-pasted-image-layer').forEach(removePastedImageLayer);
  });
  document.addEventListener('mvip-whiteboard-capture-ready', (event) => {
    const detail = event instanceof CustomEvent ? event.detail : null;
    if (!detail || !(detail.blob instanceof Blob)) return;
    latestCapture = detail;
    updatePasteButtons();
  });
  document.addEventListener('mvip-whiteboard-capture-mode-change', (event) => {
    if (syncingCaptureMode || !(splitPresenter instanceof HTMLElement)
        || panel.hidden || !panel.classList.contains('is-split')) return;
    const detail = event instanceof CustomEvent ? event.detail : null;
    const active = !!(detail && detail.active);
    if (active) setSharedCaptureMode(true);
    else {
      sharedCaptureMode = false;
      cancelLeftCapture();
      paintSharedCaptureUi(false);
    }
  });
  document.addEventListener('keydown', (event) => {
    if (event.key !== 'Escape' || !leftCaptureState) return;
    event.preventDefault(); event.stopImmediatePropagation();
    if (splitPresenter instanceof HTMLElement && !panel.hidden && panel.classList.contains('is-split')) {
      setSharedCaptureMode(false);
    } else cancelLeftCapture();
  }, true);

  /* Chỉ chiếm quyền xử lý nút kích thước khi đang chia đôi. Với bảng trắng
     nổi, để trình xử lý gốc luân phiên giữa 1/4 màn hình và toàn màn hình. */
  if (sizeBtn) sizeBtn.addEventListener('click', (event) => {
    if (!panel.classList.contains('is-split') || !(splitPresenter instanceof HTMLElement)) return;
    event.preventDefault();event.stopImmediatePropagation();
    setBoardFullscreen(!panel.classList.contains('is-board-fullscreen'));
  }, true);
  closeBtn?.addEventListener('click', () => {
    if (panel.classList.contains('is-split')) clearSplit();
  }, true);
  document.querySelectorAll('.mvip-whiteboard-open-btn').forEach((button) => button.addEventListener('click', (event) => {
    /* Ngoài chế độ chia đôi, không chặn sự kiện: nút Bảng trắng sẽ mở/đóng
       bảng nổi ở góc dưới bên phải bằng trình xử lý gốc. */
    if (!panel.classList.contains('is-split') || !(splitPresenter instanceof HTMLElement)) return;
    event.preventDefault();
    event.stopImmediatePropagation();
    showWhiteboard();
  }, true));

  document.querySelectorAll('#wordPresentationAnswerBtn, #singleExamAnswerBtn').forEach((button) => {
    button.addEventListener('click', (event) => interceptSplitSolutionButton(event, button), true);
    button.addEventListener('click', () => handleAnswerAfterNativeClick(button));
  });
  const hiddenObserver = new MutationObserver(() => {
    if (panel.hidden && splitPresenter) clearSplit();
  });
  hiddenObserver.observe(panel, { attributes:true, attributeFilter:['hidden'] });
  if (imageZoomModal instanceof HTMLElement) {
    const imageZoomObserver = new MutationObserver(() => {
      if (!imageZoomModal.hidden) routeImageZoomToRightPane();
    });
    imageZoomObserver.observe(imageZoomModal, { attributes:true, attributeFilter:['hidden'] });
  }
  ['wordPresentationProgress', 'singleExamProgressText'].forEach((id) => {
    const node = document.getElementById(id);
    if (!node) return;
    let previousProgress = String(node.textContent || '').trim();
    const observer = new MutationObserver(() => {
      const nextProgress = String(node.textContent || '').trim();
      const questionChanged = nextProgress !== previousProgress;
      previousProgress = nextProgress;
      if (questionChanged && splitPresenter && node.closest(`#${splitPresenter.id}`)) {
        clearTemporaryPaste();
        if (rightMode === 'answer') showWhiteboard();
      }
    });
    observer.observe(node, { childList:true, characterData:true, subtree:true });
  });
  window.addEventListener('resize', () => {
    if (!syntheticResize) scheduleLayout();
    requestAnimationFrame(constrainTemporaryPaste);
  });
  document.addEventListener('fullscreenchange', () => requestAnimationFrame(() => {
    if (splitPresenter && !panel.hidden) { mountInFullscreenHost(); scheduleLayout(); refreshSplitPresenterFit(); }
  }));
  document.addEventListener('webkitfullscreenchange', () => requestAnimationFrame(() => {
    if (splitPresenter && !panel.hidden) { mountInFullscreenHost(); scheduleLayout(); refreshSplitPresenterFit(); }
  }));

  window.mvipWhiteboardSplitScreen = {
    open(presenterId){ const presenter = document.getElementById(String(presenterId || 'wordPresentationPresenter')); if (presenter) openSplitForPresenter(presenter); },
    close(){ if (!splitPresenter) return false; const id = splitPresenter.id; toggleSplit(id); return true; },
    toggle:toggleSplit,
    showWhiteboard,
    isActive(){ return !!(splitPresenter && panel.classList.contains('is-split') && !panel.hidden); }
  };
  syncButtons(); syncPaneButtons();
})();
</script>


<style id="cv7991-geometry-drawing-tools-style-20260823">
  .cv7991-side-geometry-tool[aria-pressed="true"] {
    border-color:#7c3aed !important;
    background:#f5f3ff !important;
    color:#6d28d9 !important;
    box-shadow:0 0 0 2px rgba(124,58,237,.16) !important;
  }
  .cv7991-side-geometry-tool svg { width:21px !important; height:21px !important; }
  .cv7991-geometry-menu[hidden] { display:none !important; }
  .cv7991-geometry-menu {
    position:absolute;
    right:calc(100% + 9px);
    z-index:310;
    width:min(330px, calc(100vw - 86px));
    box-sizing:border-box;
    padding:11px;
    border:1px solid #cbd5e1;
    border-radius:15px;
    background:#fff;
    box-shadow:0 18px 44px rgba(15,23,42,.31);
    max-height:calc(100vh - 24px);
    overflow:auto;
  }
  .cv7991-geometry-menu-title {
    margin:0 0 9px;
    color:#334155;
    font:900 13px/1.25 Arial,Helvetica,sans-serif;
    text-align:left;
  }
  .cv7991-geometry-menu-grid {
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:8px;
  }
  .cv7991-geometry-choice {
    min-width:0;
    min-height:68px;
    box-sizing:border-box;
    padding:7px 5px 6px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
    border:1px solid #dbe4f0;
    border-radius:11px;
    background:#fff;
    color:#334155;
    font:800 11px/1.12 Arial,Helvetica,sans-serif;
    text-align:center;
    cursor:pointer;
  }
  .cv7991-geometry-choice:hover,
  .cv7991-geometry-choice[aria-checked="true"] {
    border-color:#7c3aed;
    background:#f5f3ff;
    color:#6d28d9;
    box-shadow:0 0 0 2px rgba(124,58,237,.12);
  }
  .cv7991-geometry-choice svg {
    width:29px;
    height:29px;
    flex:0 0 auto;
    display:block;
    pointer-events:none;
  }
  .cv7991-geometry-choice span { pointer-events:none; }
  .cv7991-geometry-canvas {
    position:absolute !important;
    left:0 !important;
    top:0 !important;
    z-index:64 !important;
    display:block !important;
    margin:0 !important;
    padding:0 !important;
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    pointer-events:none;
    touch-action:none;
    user-select:none;
    -webkit-user-select:none;
  }
  #wordPresentationViewport > .cv7991-geometry-canvas { z-index:24 !important; }
  #singleExamSlide > .cv7991-geometry-canvas { z-index:64 !important; }
  #wordPresentationImageZoomContent > .cv7991-geometry-canvas { z-index:10 !important; }
  .cv7991-geometry-canvas.is-active { pointer-events:auto; cursor:crosshair; }
  .cv7991-image-zoom-geometry-tool {
    width:36px !important;
    min-width:36px !important;
    padding:0 !important;
  }
  .cv7991-image-zoom-geometry-tool svg {
    width:20px !important;
    height:20px !important;
  }
  .cv7991-image-zoom-geometry-menu {
    top:calc(100% + 9px) !important;
    right:auto !important;
    left:50% !important;
    transform:translateX(-50%) !important;
  }
  /* Nút Hộp công cụ vẽ hình luôn màu xanh để dễ nhận biết và có mũi tên
     báo hiệu còn một bảng công cụ mở rộng phía sau. */
  .cv7991-side-geometry-tool {
    position:relative !important;
    border-color:#1d4ed8 !important;
    background:#2563eb !important;
    color:#ffffff !important;
    box-shadow:0 1px 3px rgba(37,99,235,.26) !important;
  }
  .cv7991-side-geometry-tool:hover,
  .cv7991-side-geometry-tool[aria-pressed="true"] {
    border-color:#1e40af !important;
    background:#1d4ed8 !important;
    color:#ffffff !important;
    box-shadow:0 0 0 2px rgba(37,99,235,.18) !important;
  }
  .cv7991-side-geometry-tool::after {
    content:"";
    position:absolute;
    right:3px;
    bottom:3px;
    width:0;
    height:0;
    border-left:3px solid transparent;
    border-right:3px solid transparent;
    border-top:4px solid currentColor;
    opacity:.96;
    pointer-events:none;
  }
  /* Bốn dụng cụ hình học là nhóm công cụ vật lý, luôn dùng nền xanh. */
  .cv7991-geometry-choice.is-instrument-choice {
    border-color:#1d4ed8 !important;
    background:#2563eb !important;
    color:#ffffff !important;
  }
  .cv7991-geometry-choice.is-instrument-choice:hover,
  .cv7991-geometry-choice.is-instrument-choice[aria-checked="true"] {
    border-color:#1e40af !important;
    background:#1d4ed8 !important;
    color:#ffffff !important;
    box-shadow:0 0 0 2px rgba(37,99,235,.18) !important;
  }
  /* Bốn hình khối không hiện nhãn chữ; icon được phóng lớn để tự nhận biết. */
  .cv7991-geometry-choice.is-solid-choice {
    min-height:68px;
    padding:5px 4px;
  }
  .cv7991-geometry-choice.is-solid-choice svg {
    width:52px !important;
    height:42px !important;
    max-width:88%;
  }
  /* Các nút chọn màu đều có mũi tên nhỏ ở góc phải dưới. */
  .word-presentation-ink-color-btn,
  .cv7991-side-ink-color-config,
  .word-image-zoom-ink-color-config-btn,
  #mvipWhiteboardColorBtn {
    position:relative !important;
  }
  .word-presentation-ink-color-btn::after,
  .cv7991-side-ink-color-config::after,
  .word-image-zoom-ink-color-config-btn::after,
  #mvipWhiteboardColorBtn::after {
    content:"";
    position:absolute;
    right:3px;
    bottom:3px;
    width:0;
    height:0;
    border-left:3px solid transparent;
    border-right:3px solid transparent;
    border-top:4px solid currentColor;
    opacity:.82;
    pointer-events:none;
  }
  @media (max-width:760px),(max-height:560px) {
    .cv7991-side-geometry-tool svg { width:18px !important; height:18px !important; }
    .cv7991-geometry-menu {
      right:calc(100% + 6px);
      width:min(282px,calc(100vw - 66px));
      padding:9px;
      border-radius:13px;
    }
    .cv7991-geometry-menu-grid { gap:6px; }
    .cv7991-geometry-choice { min-height:61px; padding:6px 3px 5px; font-size:10px; }
    .cv7991-geometry-choice svg { width:25px; height:25px; }
  }
</style>

<!-- Bản điều chỉnh 2026-08-24: Đoạn thẳng, Tia và Đường thẳng bắt đầu chính xác từ vòng tròn tâm quay nhờ bắt sự kiện ưu tiên ở pha capture. -->
<script id="cv7991-geometry-drawing-tools-script-20260823">
(() => {
  'use strict';

  const TOOLBOX_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M3.5 19.5h17" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/><path d="M5 17 10.5 7l5.5 10H5Z" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"/><circle cx="17.4" cy="8" r="3.1" stroke="currentColor" stroke-width="1.8"/><path d="M3.5 4.5h6" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>';
  const ICONS = Object.freeze({
    segment:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><circle cx="6" cy="23" r="2.2" fill="currentColor"/><circle cx="26" cy="9" r="2.2" fill="currentColor"/><path d="M7.8 21.7 24.2 10.3" stroke="currentColor" stroke-width="2.2" stroke-linecap="round"/></svg>',
    ray:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><circle cx="6" cy="23" r="2.2" fill="currentColor"/><path d="M7.8 21.7 25.2 9.7" stroke="currentColor" stroke-width="2.2" stroke-linecap="round"/><path d="m20.2 8.8 6.2.1-2 5.8" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    line:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><path d="M5 24.2 27 7.8" stroke="currentColor" stroke-width="2.2" stroke-linecap="round"/><path d="m4.9 18.5-.8 6.7 6.6-1.2M21.3 8l6.6-1.2-.8 6.7" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/></svg>',
    rightTriangle:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><path d="M6 25V7l20 18H6Z" stroke="currentColor" stroke-width="2.1" stroke-linejoin="round"/><path d="M6 20h5v5" stroke="currentColor" stroke-width="1.8" stroke-linejoin="round"/></svg>',
    triangle:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><path d="m16 5 11 21H5L16 5Z" stroke="currentColor" stroke-width="2.1" stroke-linejoin="round"/></svg>',
    rectangle:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><rect x="5" y="8" width="22" height="16" rx="1" stroke="currentColor" stroke-width="2.1"/></svg>',
    circle:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><circle cx="16" cy="16" r="10.5" stroke="currentColor" stroke-width="2.1"/><circle cx="16" cy="16" r="2.2" fill="currentColor"/></svg>',
    compass:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><circle cx="16" cy="6" r="2" stroke="currentColor" stroke-width="1.8"/><path d="M15.2 8 8 26M16.8 8 24 26M11 19.5h10" stroke="currentColor" stroke-width="2" stroke-linecap="round"/><path d="m7 26 3-1M22 25l3 1" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>',
    protractor:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><path d="M5 24a11 11 0 0 1 22 0H5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="M16 24V13M10.5 24l2.7-9.4M21.5 24l-2.7-9.4M7.8 19.5l4.8 2.8M24.2 19.5l-4.8 2.8" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>',
    setSquare:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><path d="M5 26V6l22 20H5Z" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="M10 21V12l10 9H10Z" stroke="currentColor" stroke-width="1.5" stroke-linejoin="round"/><path d="M5 21h5v5" stroke="currentColor" stroke-width="1.6"/></svg>',
    ruler:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><rect x="4" y="9" width="24" height="14" rx="1.5" stroke="currentColor" stroke-width="2"/><path d="M7 9v5M10 9v3M13 9v5M16 9v3M19 9v5M22 9v3M25 9v5M7 23v-5M10 23v-3M13 23v-5M16 23v-3M19 23v-5M22 23v-3M25 23v-5" stroke="currentColor" stroke-width="1.2"/></svg>',
    point:'<svg aria-hidden="true" viewBox="0 0 32 32" fill="none"><circle cx="16" cy="16" r="5.2" fill="currentColor"/><circle cx="16" cy="16" r="9.2" stroke="currentColor" stroke-width="1.7" opacity=".28"/></svg>',
    cuboid:'<svg aria-hidden="true" viewBox="0 0 44 34" fill="none"><path d="M5 12h24v17H5zM12 5h27v17H29M5 12l7-7M29 12l10-7M29 29l10-7" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="M12 5v17M12 22h27" stroke="currentColor" stroke-width="1.5" stroke-dasharray="2.5 2.5"/></svg>',
    cone:'<svg aria-hidden="true" viewBox="0 0 44 34" fill="none"><path d="M22 4 6 27M22 4l16 23" stroke="currentColor" stroke-width="2" stroke-linecap="round"/><path d="M6 27c0 3 7.2 5 16 5s16-2 16-5" stroke="currentColor" stroke-width="2"/><path d="M6 27c0-3 7.2-5 16-5s16 2 16 5" stroke="currentColor" stroke-width="1.5" stroke-dasharray="3 2.5"/></svg>',
    cylinder:'<svg aria-hidden="true" viewBox="0 0 44 34" fill="none"><ellipse cx="22" cy="7" rx="14" ry="5" stroke="currentColor" stroke-width="2"/><path d="M8 7v20M36 7v20" stroke="currentColor" stroke-width="2"/><path d="M8 27c0 3 6.3 5 14 5s14-2 14-5" stroke="currentColor" stroke-width="2"/><path d="M8 27c0-3 6.3-5 14-5s14 2 14 5" stroke="currentColor" stroke-width="1.5" stroke-dasharray="3 2.5"/></svg>',
    sphere:'<svg aria-hidden="true" viewBox="0 0 44 34" fill="none"><ellipse cx="22" cy="17" rx="15" ry="15" stroke="currentColor" stroke-width="2"/><path d="M7 17c0 4 6.7 7 15 7s15-3 15-7" stroke="currentColor" stroke-width="2"/><path d="M7 17c0-4 6.7-7 15-7s15 3 15 7" stroke="currentColor" stroke-width="1.5" stroke-dasharray="3 2.5"/></svg>'
  });
  const TOOLS = Object.freeze([
    { id:'segment', label:'Đoạn thẳng' },
    { id:'ray', label:'Tia' },
    { id:'line', label:'Đường thẳng' },
    { id:'rightTriangle', label:'Tam giác vuông' },
    { id:'triangle', label:'Tam giác thường' },
    { id:'rectangle', label:'Hình chữ nhật' },
    { id:'circle', label:'Đường tròn' },
    { id:'cuboid', label:'Hình hộp chữ nhật', solid:true },
    { id:'cylinder', label:'Hình trụ', solid:true },
    { id:'cone', label:'Hình nón', solid:true },
    { id:'sphere', label:'Hình cầu', solid:true },
    { id:'compass', label:'Compa', instrument:true },
    { id:'protractor', label:'Thước đo độ', instrument:true },
    { id:'setSquare', label:'Thước eke', instrument:true },
    { id:'ruler', label:'Thước thẳng', instrument:true },
    { id:'point', label:'Điểm' }
  ]);
  const INSTRUMENT_TYPES = new Set(['setSquare', 'ruler']);
  const COMPASS_BODY_COLOR = '#ef4444';
  const UNDOABLE_SHAPE_TYPES = new Set([
    'segment', 'ray', 'line', 'rightTriangle', 'triangle', 'rectangle',
    'circle', 'cuboid', 'cylinder', 'cone', 'sphere', 'arcTrace', 'point'
  ]);
  const ERASABLE_SHAPE_TYPES = new Set([
    'segment', 'ray', 'line', 'rightTriangle', 'triangle', 'rectangle',
    'circle', 'cuboid', 'cylinder', 'cone', 'sphere', 'arcTrace', 'point'
  ]);
  const instances = [];

  function clamp(value, min, max) {
    return Math.max(min, Math.min(max, Number(value) || 0));
  }
  function normalizeAngle(angle) {
    let value = Number(angle) || 0;
    while (value < 0) value += Math.PI * 2;
    while (value >= Math.PI * 2) value -= Math.PI * 2;
    return value;
  }
  function shortestSignedAngleDelta(fromAngle, toAngle) {
    let delta = (Number(toAngle) || 0) - (Number(fromAngle) || 0);
    while (delta <= -Math.PI) delta += Math.PI * 2;
    while (delta > Math.PI) delta -= Math.PI * 2;
    return delta;
  }
  function angleOnDirectedSweep(angle, from, to, tolerance = 0.055) {
    const sweep = (Number(to) || 0) - (Number(from) || 0);
    if (Math.abs(sweep) >= Math.PI * 2 - tolerance) return true;
    if (sweep >= 0) {
      const delta = normalizeAngle((Number(angle) || 0) - (Number(from) || 0));
      return delta <= sweep + tolerance;
    }
    const delta = normalizeAngle((Number(from) || 0) - (Number(angle) || 0));
    return delta <= -sweep + tolerance;
  }
  const dist = (a, b) => Math.hypot(Number(a && a.x) - Number(b && b.x), Number(a && a.y) - Number(b && b.y));
  function projectPointToSegment(point, a, b) {
    const dx = b.x - a.x;
    const dy = b.y - a.y;
    const lengthSq = dx * dx + dy * dy;
    if (lengthSq < 1e-8) return { point:{ x:a.x, y:a.y }, t:0, distance:dist(point, a) };
    const t = clamp(((point.x - a.x) * dx + (point.y - a.y) * dy) / lengthSq, 0, 1);
    const projected = { x:a.x + dx * t, y:a.y + dy * t };
    return { point:projected, t, distance:dist(point, projected) };
  }
  function pointSegmentDistance(point, a, b) {
    return projectPointToSegment(point, a, b).distance;
  }
  function pointInPolygon(point, vertices) {
    if (!Array.isArray(vertices) || vertices.length < 3) return false;
    let inside = false;
    for (let i = 0, j = vertices.length - 1; i < vertices.length; j = i++) {
      const xi = vertices[i].x;
      const yi = vertices[i].y;
      const xj = vertices[j].x;
      const yj = vertices[j].y;
      const intersect = ((yi > point.y) !== (yj > point.y))
        && (point.x < ((xj - xi) * (point.y - yi)) / ((yj - yi) || 1e-9) + xi);
      if (intersect) inside = !inside;
    }
    return inside;
  }
  function intersections(a, b, width, height) {
    const dx = b.x - a.x;
    const dy = b.y - a.y;
    const eps = 1e-7;
    const output = [];
    if (Math.abs(dx) > eps) {
      [0, width].forEach((x) => {
        const t = (x - a.x) / dx;
        const y = a.y + t * dy;
        if (y >= -eps && y <= height + eps) output.push({ x, y:clamp(y, 0, height), t });
      });
    }
    if (Math.abs(dy) > eps) {
      [0, height].forEach((y) => {
        const t = (y - a.y) / dy;
        const x = a.x + t * dx;
        if (x >= -eps && x <= width + eps) output.push({ x:clamp(x, 0, width), y, t });
      });
    }
    const unique = [];
    output.forEach((item) => {
      if (!unique.some((other) => Math.abs(other.x - item.x) < .35 && Math.abs(other.y - item.y) < .35)) unique.push(item);
    });
    return unique.sort((left, right) => left.t - right.t);
  }
  function lineEnds(type, a, b, width, height) {
    if (type === 'segment') return [a, b];
    const hits = intersections(a, b, width, height);
    if (!hits.length) return [a, b];
    if (type === 'ray') {
      const forward = hits.filter((item) => item.t >= -1e-6);
      return [a, forward.length ? forward[forward.length - 1] : b];
    }
    return hits.length >= 2 ? [hits[0], hits[hits.length - 1]] : [a, b];
  }
  function arrow(ctx, from, to, size = 13) {
    const angle = Math.atan2(to.y - from.y, to.x - from.x);
    const spread = Math.PI / 7;
    ctx.beginPath();
    ctx.moveTo(to.x, to.y);
    ctx.lineTo(to.x - size * Math.cos(angle - spread), to.y - size * Math.sin(angle - spread));
    ctx.moveTo(to.x, to.y);
    ctx.lineTo(to.x - size * Math.cos(angle + spread), to.y - size * Math.sin(angle + spread));
    ctx.stroke();
  }
  function cloneShapes(items) {
    return (Array.isArray(items) ? items : []).map((shape) => ({
      type:String(shape && shape.type || ''),
      color:String(shape && shape.color || '#ef4444'),
      a:{ x:Number(shape && shape.a && shape.a.x) || 0, y:Number(shape && shape.a && shape.a.y) || 0 },
      b:{ x:Number(shape && shape.b && shape.b.x) || 0, y:Number(shape && shape.b && shape.b.y) || 0 },
      segments:Array.isArray(shape && shape.segments)
        ? shape.segments.map((segment) => ({ from:Number(segment && segment.from) || 0, to:Number(segment && segment.to) || 0 }))
        : [],
      scaleSide:String(shape && shape.scaleSide || '') || undefined
    }));
  }

  function createInstance(options) {
    const presenter = document.getElementById(options.presenterId);
    const surface = document.getElementById(options.surfaceId);
    const dock = document.getElementById(options.dockId);
    const api = window[options.apiName];
    const progress = document.getElementById(options.progressId);
    const visibleViewport = options.visibleViewportId
      ? document.getElementById(options.visibleViewportId)
      : null;
    if (!(presenter instanceof HTMLElement)
        || !(surface instanceof HTMLElement)
        || !(dock instanceof HTMLElement)
        || !api
        || typeof api.tool !== 'function') return null;
    if (document.getElementById(options.buttonId)) return null;

    const button = document.createElement('button');
    button.type = 'button';
    button.id = options.buttonId;
    button.className = String(options.buttonClass || 'cv7991-side-ink-tool cv7991-side-geometry-tool');
    button.setAttribute('aria-haspopup', 'menu');
    button.setAttribute('aria-expanded', 'false');
    button.setAttribute('aria-pressed', 'false');
    button.setAttribute('aria-label', 'Hộp công cụ vẽ hình');
    button.title = 'Hộp công cụ vẽ hình';
    button.innerHTML = TOOLBOX_ICON;
    const undoButton = dock.querySelector(String(options.undoSelector || '.cv7991-side-ink-undo'));
    const fallbackAnchor = dock.querySelector(String(options.fallbackSelector || '.cv7991-side-ink-popover'));
    dock.insertBefore(button, undoButton || fallbackAnchor || null);

    const menu = document.createElement('div');
    menu.id = options.menuId;
    menu.className = `cv7991-geometry-menu${options.menuClass ? ` ${options.menuClass}` : ''}`;
    menu.hidden = true;
    menu.setAttribute('role', 'menu');
    menu.setAttribute('aria-label', 'Chọn công cụ vẽ hình học');
    menu.innerHTML = '<div class="cv7991-geometry-menu-title">Công cụ vẽ hình</div><div class="cv7991-geometry-menu-grid"></div>';
    dock.appendChild(menu);
    const grid = menu.querySelector('.cv7991-geometry-menu-grid');

    const canvas = document.createElement('canvas');
    canvas.id = options.canvasId;
    canvas.className = 'cv7991-geometry-canvas word-presentation-ink-canvas';
    canvas.setAttribute('aria-hidden', 'true');

    const preserveWhenHidden = options.preserveWhenHidden === true;
    const state = {
      tool:'',
      shapes:[],
      undo:[],
      dragging:false,
      erasing:false,
      eraseChanged:false,
      eraseUndoChanged:false,
      pointerId:null,
      start:null,
      end:null,
      w:0,
      h:0,
      dpr:1,
      resizeFrame:0,
      attachFrame:0,
      signature:'',
      interaction:null,
      previewArc:null,
      autoSegment:null,
      dragCaptureTarget:null,
      edgeShadows:[],
      nextEdgeShadowId:1,
      shadowRedrawFrame:0
    };

    function ensureAttached() {
      canvas.classList.remove('cv7991-presentation-image-frame', 'word-presentation-direct-zoom');
      ['data-word-image-zoom', 'tabindex', 'role', 'aria-label', 'title'].forEach((name) => canvas.removeAttribute(name));
      if (canvas.parentNode !== surface) surface.appendChild(canvas);
    }
    ensureAttached();

    const definition = () => TOOLS.find((item) => item.id === state.tool) || null;
    const color = () => {
      try { return String(typeof api.color === 'function' ? api.color() : '').trim() || '#ef4444'; }
      catch (_) { return '#ef4444'; }
    };
    const signature = () => `${preserveWhenHidden ? 'persistent' : (presenter.hidden ? 'hidden' : 'shown')}|${progress instanceof HTMLElement ? String(progress.textContent || '').trim() : ''}`;
    const px = (point) => ({ x:(Number(point && point.x) || 0) * state.w, y:(Number(point && point.y) || 0) * state.h });
    const normFromSurfacePoint = (point) => ({
      x:clamp((Number(point && point.x) || 0) / Math.max(1, state.w), 0, 1),
      y:clamp((Number(point && point.y) || 0) / Math.max(1, state.h), 0, 1)
    });
    const normFromSurfacePointRaw = (point) => ({
      x:(Number(point && point.x) || 0) / Math.max(1, state.w),
      y:(Number(point && point.y) || 0) / Math.max(1, state.h)
    });
    function visibleSurfaceFrame() {
      if (visibleViewport instanceof HTMLElement && visibleViewport !== surface) {
        const left = clamp(Number(visibleViewport.scrollLeft) || 0, 0, Math.max(0, state.w - 1));
        const top = clamp(Number(visibleViewport.scrollTop) || 0, 0, Math.max(0, state.h - 1));
        const width = clamp(Number(visibleViewport.clientWidth) || 1, 1, Math.max(1, state.w - left));
        const height = clamp(Number(visibleViewport.clientHeight) || 1, 1, Math.max(1, state.h - top));
        return { left, top, width, height, right:left + width, bottom:top + height };
      }
      return { left:0, top:0, width:Math.max(1, state.w), height:Math.max(1, state.h), right:Math.max(1, state.w), bottom:Math.max(1, state.h) };
    }
    function norm(event) {
      const rect = canvas.getBoundingClientRect();
      const width = Math.max(1, rect.width);
      const height = Math.max(1, rect.height);
      return {
        x:clamp((Number(event.clientX) - rect.left) / width, 0, 1),
        y:clamp((Number(event.clientY) - rect.top) / height, 0, 1)
      };
    }
    function pointOnSurface(event) {
      const rect = surface.getBoundingClientRect();
      return { x:Number(event.clientX) - rect.left, y:Number(event.clientY) - rect.top };
    }
    function resize() {
      ensureAttached();
      const rect = surface.getBoundingClientRect();
      const width = Math.max(1, Math.round(rect.width));
      const height = Math.max(1, Math.round(rect.height));
      const requestedDpr = Math.max(1, Math.min(3, Number(devicePixelRatio) || 1));
      /* Bảng trắng có thể nới ra liên tục. Giới hạn số điểm ảnh riêng cho
         canvas hình học để vùng lớn vẫn vẽ được mà không cạn bộ nhớ. */
      const budgetDpr = presenter.id === 'mvipWhiteboardPanel'
        ? Math.sqrt(16000000 / Math.max(1, width * height))
        : requestedDpr;
      const dpr = presenter.id === 'mvipWhiteboardPanel'
        ? Math.max(.5, Math.min(requestedDpr, budgetDpr))
        : requestedDpr;
      const changed = state.w !== width
        || state.h !== height
        || state.dpr !== dpr
        || canvas.width !== Math.round(width * dpr)
        || canvas.height !== Math.round(height * dpr);
      state.w = width;
      state.h = height;
      state.dpr = dpr;
      if (changed) {
        canvas.width = Math.round(width * dpr);
        canvas.height = Math.round(height * dpr);
        canvas.style.width = `${width}px`;
        canvas.style.height = `${height}px`;
      }
      const x = Math.max(0, Number(surface.scrollLeft) || 0);
      const y = Math.max(0, Number(surface.scrollTop) || 0);
      canvas.style.transform = (x || y) ? `translate(${x}px, ${y}px)` : 'none';
      if (changed) redraw();
    }
    function scheduleResize() {
      if (state.resizeFrame) cancelAnimationFrame(state.resizeFrame);
      state.resizeFrame = requestAnimationFrame(() => {
        state.resizeFrame = 0;
        resize();
      });
    }

    function rightMarker(ctx, a, b, c) {
      const ux = Math.sign(a.x - b.x) || 1;
      const uy = Math.sign(c.y - b.y) || 1;
      const size = Math.max(7, Math.min(16, Math.abs(a.x - b.x) * .22, Math.abs(c.y - b.y) * .22));
      ctx.beginPath();
      ctx.moveTo(b.x + ux * size, b.y);
      ctx.lineTo(b.x + ux * size, b.y + uy * size);
      ctx.lineTo(b.x, b.y + uy * size);
      ctx.stroke();
    }
    function drawHandle(ctx, point, stroke, fill = '#fff', radius = 5.3) {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, radius, 0, Math.PI * 2);
      ctx.fillStyle = fill;
      ctx.fill();
      ctx.lineWidth = 2;
      ctx.strokeStyle = stroke;
      ctx.stroke();
      ctx.restore();
    }
    function drawCenterMarker(ctx, point, stroke) {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, 2.6, 0, Math.PI * 2);
      ctx.fillStyle = stroke;
      ctx.fill();
      ctx.restore();
    }
    function drawRotationCenterMarker(ctx, point) {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, 6.4, 0, Math.PI * 2);
      ctx.lineWidth = 1.9;
      ctx.strokeStyle = '#2563eb';
      ctx.stroke();
      ctx.restore();
    }
    function drawRotateHandle(ctx, point) {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, 8.2, 0, Math.PI * 2);
      ctx.fillStyle = '#2563eb';
      ctx.fill();
      ctx.lineWidth = 1.7;
      ctx.strokeStyle = '#dbeafe';
      ctx.stroke();
      ctx.strokeStyle = '#ffffff';
      ctx.lineWidth = 1.7;
      ctx.beginPath();
      ctx.arc(point.x, point.y, 3.5, -Math.PI * .15, Math.PI * 1.15, false);
      ctx.stroke();
      ctx.beginPath();
      ctx.moveTo(point.x + 1.6, point.y - 4.9);
      ctx.lineTo(point.x + 5.4, point.y - 4.4);
      ctx.lineTo(point.x + 3.2, point.y - 1.2);
      ctx.stroke();
      ctx.restore();
    }
    function drawMoveHandle(ctx, point) {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, 8.6, 0, Math.PI * 2);
      ctx.fillStyle = '#2563eb';
      ctx.fill();
      ctx.lineWidth = 1.7;
      ctx.strokeStyle = '#dbeafe';
      ctx.stroke();
      ctx.strokeStyle = '#ffffff';
      ctx.lineWidth = 1.5;
      ctx.lineCap = 'round';
      ctx.lineJoin = 'round';
      const size = 4.1;
      ctx.beginPath();
      ctx.moveTo(point.x - size, point.y);
      ctx.lineTo(point.x + size, point.y);
      ctx.moveTo(point.x, point.y - size);
      ctx.lineTo(point.x, point.y + size);
      ctx.stroke();
      const arrowSize = 2.2;
      ctx.beginPath();
      ctx.moveTo(point.x + size, point.y); ctx.lineTo(point.x + size - arrowSize, point.y - arrowSize);
      ctx.moveTo(point.x + size, point.y); ctx.lineTo(point.x + size - arrowSize, point.y + arrowSize);
      ctx.moveTo(point.x - size, point.y); ctx.lineTo(point.x - size + arrowSize, point.y - arrowSize);
      ctx.moveTo(point.x - size, point.y); ctx.lineTo(point.x - size + arrowSize, point.y + arrowSize);
      ctx.moveTo(point.x, point.y - size); ctx.lineTo(point.x - arrowSize, point.y - size + arrowSize);
      ctx.moveTo(point.x, point.y - size); ctx.lineTo(point.x + arrowSize, point.y - size + arrowSize);
      ctx.moveTo(point.x, point.y + size); ctx.lineTo(point.x - arrowSize, point.y + size - arrowSize);
      ctx.moveTo(point.x, point.y + size); ctx.lineTo(point.x + arrowSize, point.y + size - arrowSize);
      ctx.stroke();
      ctx.restore();
    }
    function drawResizeHandle(ctx, point, angle = 0) {
      ctx.save();
      ctx.translate(point.x, point.y);
      ctx.rotate(Number(angle) || 0);
      ctx.fillStyle = '#2563eb';
      ctx.strokeStyle = '#dbeafe';
      ctx.lineWidth = 1.5;
      ctx.beginPath();
      ctx.roundRect(-13, -8, 26, 16, 7);
      ctx.fill();
      ctx.stroke();
      ctx.strokeStyle = '#ffffff';
      ctx.lineWidth = 1.7;
      ctx.lineCap = 'round';
      ctx.lineJoin = 'round';
      ctx.beginPath();
      ctx.moveTo(-7, 0);
      ctx.lineTo(7, 0);
      ctx.moveTo(-7, 0);
      ctx.lineTo(-3.8, -3.1);
      ctx.moveTo(-7, 0);
      ctx.lineTo(-3.8, 3.1);
      ctx.moveTo(7, 0);
      ctx.lineTo(3.8, -3.1);
      ctx.moveTo(7, 0);
      ctx.lineTo(3.8, 3.1);
      ctx.stroke();
      ctx.restore();
    }
    function drawFlipHandle(ctx, point, angle = 0) {
      ctx.save();
      ctx.translate(point.x, point.y);
      ctx.rotate(Number(angle) || 0);
      ctx.fillStyle = '#eff6ff';
      ctx.strokeStyle = '#2563eb';
      ctx.lineWidth = 1.4;
      ctx.beginPath();
      ctx.roundRect(-11, -9, 22, 18, 6);
      ctx.fill();
      ctx.stroke();
      ctx.beginPath();
      ctx.moveTo(-4.5, -3.5);
      ctx.lineTo(4.5, -3.5);
      ctx.moveTo(1.8, -6.1);
      ctx.lineTo(4.8, -3.5);
      ctx.lineTo(1.8, -0.9);
      ctx.moveTo(4.5, 3.5);
      ctx.lineTo(-4.5, 3.5);
      ctx.moveTo(-1.8, 0.9);
      ctx.lineTo(-4.8, 3.5);
      ctx.lineTo(-1.8, 6.1);
      ctx.stroke();
      ctx.restore();
    }
    function drawCloseHandle(ctx, point, fill = '#ef4444', stroke = '#fee2e2') {
      ctx.save();
      ctx.beginPath();
      ctx.arc(point.x, point.y, 8.6, 0, Math.PI * 2);
      ctx.fillStyle = fill;
      ctx.fill();
      ctx.lineWidth = 1.6;
      ctx.strokeStyle = stroke;
      ctx.stroke();
      ctx.strokeStyle = '#ffffff';
      ctx.lineWidth = 1.9;
      ctx.beginPath();
      ctx.moveTo(point.x - 3.2, point.y - 3.2);
      ctx.lineTo(point.x + 3.2, point.y + 3.2);
      ctx.moveTo(point.x + 3.2, point.y - 3.2);
      ctx.lineTo(point.x - 3.2, point.y + 3.2);
      ctx.stroke();
      ctx.restore();
    }

    function compassGeometry(a, b) {
      const radius = dist(a, b);
      const dx = b.x - a.x;
      const dy = b.y - a.y;
      const length = Math.max(1, radius);
      const perpendicular = { x:-dy / length, y:dx / length };
      /* Giữ đúng dáng compa của index.htmlBS26: thân thấp, gọn và độ cao
         khớp tăng vừa phải theo độ mở hai chân. */
      const lift = Math.min(90, Math.max(34, radius * .62));
      const hinge = { x:(a.x + b.x) / 2 + perpendicular.x * lift, y:(a.y + b.y) / 2 + perpendicular.y * lift };
      return { radius, hinge };
    }
    function compassRotateHandlePoint(a, b) {
      const geometry = compassGeometry(a, b);
      return {
        x:geometry.hinge.x + (b.x - geometry.hinge.x) * .38,
        y:geometry.hinge.y + (b.y - geometry.hinge.y) * .38
      };
    }
    function compassMoveHandlePoint(a, b) {
      const geometry = compassGeometry(a, b);
      return { x:geometry.hinge.x, y:geometry.hinge.y - 12 };
    }
    function protractorRotateHandlePoint(center, edge) {
      const radius = dist(center, edge);
      const base = Math.atan2(edge.y - center.y, edge.x - center.x);
      const angle = base + Math.PI / 2;
      const handleRadius = Math.max(18, radius * .72);
      return { x:center.x + handleRadius * Math.cos(angle), y:center.y + handleRadius * Math.sin(angle) };
    }
    function protractorMoveHandlePoint(center, edge) {
      const radius = dist(center, edge);
      const base = Math.atan2(edge.y - center.y, edge.x - center.x);
      const angle = base + Math.PI / 2;
      const handleRadius = Math.max(24, radius * .38);
      return { x:center.x + handleRadius * Math.cos(angle), y:center.y + handleRadius * Math.sin(angle) };
    }

    function localPoint(center, ux, uy, vx, vy, x, y) {
      return { x:center.x + ux * x + vx * y, y:center.y + uy * x + vy * y };
    }
    function instrumentGeometry(shape) {
      const type = String(shape && shape.type || '');
      if (!INSTRUMENT_TYPES.has(type)) return null;
      const pivot = px(shape.a);
      const axisPoint = px(shape.b);
      const length = Math.max(96, dist(pivot, axisPoint));
      const angle = Math.atan2(axisPoint.y - pivot.y, axisPoint.x - pivot.x);
      const ux = Math.cos(angle);
      const uy = Math.sin(angle);
      const vx = -Math.sin(angle);
      const vy = Math.cos(angle);
      const upx = -vx;
      const upy = -vy;
      const pointAt = (x, y) => ({
        x:pivot.x + ux * x + upx * y,
        y:pivot.y + uy * x + upy * y
      });
      if (type === 'setSquare') {
        const height = Math.max(82, length * .62);
        const outer = [pointAt(0, 0), pointAt(0, height), pointAt(length, 0)];
        const margin = clamp(length * .115, 22, 43);
        /* Dựng cạnh huyền trong bằng một đường song song chính xác với cạnh
           huyền ngoài. Khoảng lùi được đo theo pháp tuyến, không đặt riêng hai
           đầu mút nên hai cạnh không còn hội tụ vào nhau ở phía mũi êke. */
        const hypotenuseInset = margin * .30;
        const hypotenuseLevel = 1 - (hypotenuseInset * Math.hypot(length, height)) / (length * height);
        const innerTopY = height * (hypotenuseLevel - margin / length);
        const innerRightX = length * (hypotenuseLevel - margin / height);
        const innerLocal = [
          { x:margin, y:margin },
          { x:margin, y:innerTopY },
          { x:innerRightX, y:margin }
        ];
        const inner = innerLocal.map((point) => pointAt(point.x, point.y));
        // Nút X nằm ngay bên trong góc vuông của tam giác trắng.
        const closeLocal = { x:margin + 11, y:margin + 11 };
        // Nút xoay nằm ở vùng giữa-phía dưới của tam giác trắng theo ô đánh dấu.
        const rotateLocal = {
          x:clamp(length * .55, margin + 62, length - margin * 2.05),
          y:margin + Math.min(18, Math.max(13, height * .07))
        };
        const move = pointAt(length * .34, height * .34);
        const rotate = pointAt(rotateLocal.x, rotateLocal.y);
        const scale = pointAt(length, 0);
        const close = pointAt(closeLocal.x, closeLocal.y);
        const snapEdges = [
          [outer[0], outer[1]], [outer[1], outer[2]], [outer[2], outer[0]],
          [inner[0], inner[1]], [inner[1], inner[2]], [inner[2], inner[0]]
        ];
        return {
          type, pivot, center:move, angle, ux, uy, vx, vy, upx, upy,
          length, halfLength:length / 2, height, outer, inner,
          move, rotate, scale, close, pointAt, snapEdges
        };
      }
      const width = clamp(length * .17, 42, 74);
      const side = shape && shape.scaleSide === 'bottom' ? 'bottom' : 'top';
      // shape.a (pivot) is the exact intersection of the 0 mark and the currently
      // graduated ruler edge. The body therefore extends to only one side of it.
      const outer = side === 'top'
        ? [pointAt(0, 0), pointAt(length, 0), pointAt(length, -width), pointAt(0, -width)]
        : [pointAt(0, width), pointAt(length, width), pointAt(length, 0), pointAt(0, 0)];
      // All controls stay inside the half without graduation marks and flip with
      // the selected edge while the zero-mark pivot remains fixed.
      const controlY = side === 'top' ? -width * .62 : width * .62;
      const close = pointAt(Math.min(16, length * .055), controlY);
      const toggle = pointAt(length * .34, controlY);
      const move = pointAt(length * .56, controlY);
      const scale = pointAt(Math.max(62, length - 18), controlY);
      // Nút xoay nằm sát bên trái nút phóng to/thu nhỏ ở cuối thước.
      const rotate = pointAt(Math.max(72, length - 48), controlY);
      const snapEdges = [
        [outer[0], outer[1]], [outer[1], outer[2]],
        [outer[2], outer[3]], [outer[3], outer[0]]
      ];
      return {
        type, pivot, rotationCenter:pivot, center:move, angle, ux, uy, vx, vy, upx, upy,
        length, halfLength:length / 2, width, outer,
        move, rotate, scale, close, toggle, side, pointAt, snapEdges
      };
    }

    function drawHorizontalMillimeterScale(ctx, startX, endX, y, inward, edgeLength, totalMm = 140) {
      const length = Math.max(1, Math.abs(endX - startX));
      const count = Math.max(1, Math.round(Number(totalMm) || 140));
      const mmPx = length / count;
      const direction = endX >= startX ? 1 : -1;
      ctx.save();
      ctx.strokeStyle = '#334155';
      ctx.fillStyle = '#1f2937';
      ctx.textBaseline = inward < 0 ? 'bottom' : 'top';
      ctx.font = `${clamp(edgeLength * .035, 7, 10)}px Arial, Helvetica, sans-serif`;
      for (let index = 0; index <= count; index += 1) {
        const x = startX + direction * (index * mmPx);
        const major = index % 10 === 0;
        const medium = !major && index % 5 === 0;
        const tick = major ? 13 : (medium ? 8 : 4.5);
        ctx.globalAlpha = major ? .95 : (medium ? .76 : .54);
        ctx.lineWidth = major ? 1.1 : .7;
        ctx.beginPath();
        ctx.moveTo(x, y);
        ctx.lineTo(x, y + inward * tick);
        ctx.stroke();
        if (major) {
          ctx.globalAlpha = .9;
          ctx.textAlign = index === 0 ? 'left' : (index === count ? 'right' : 'center');
          ctx.fillText(String(index / 10), x, y + inward * (tick + 2));
        }
      }
      ctx.restore();
    }
    function drawVerticalMillimeterScale(ctx, x, startY, endY, inward, edgeLength, totalMm = 100) {
      const length = Math.max(1, Math.abs(endY - startY));
      const count = Math.max(1, Math.round(Number(totalMm) || 100));
      const mmPx = length / count;
      const direction = endY >= startY ? 1 : -1;
      ctx.save();
      ctx.strokeStyle = '#334155';
      ctx.fillStyle = '#1f2937';
      ctx.textAlign = inward > 0 ? 'left' : 'right';
      ctx.textBaseline = 'middle';
      ctx.font = `${clamp(edgeLength * .035, 7, 10)}px Arial, Helvetica, sans-serif`;
      for (let index = 0; index <= count; index += 1) {
        const y = startY + direction * (index * mmPx);
        const major = index % 10 === 0;
        const medium = !major && index % 5 === 0;
        const tick = major ? 13 : (medium ? 8 : 4.5);
        ctx.globalAlpha = major ? .95 : (medium ? .76 : .54);
        ctx.lineWidth = major ? 1.1 : .7;
        ctx.beginPath();
        ctx.moveTo(x, y);
        ctx.lineTo(x + inward * tick, y);
        ctx.stroke();
        if (major) {
          ctx.globalAlpha = .9;
          ctx.fillText(String(index / 10), x + inward * (tick + 3), y);
        }
      }
      ctx.restore();
    }

    function drawSetSquareInstrument(ctx, geometry) {
      const length = geometry.length;
      const height = geometry.height;
      ctx.save();
      ctx.beginPath();
      ctx.moveTo(geometry.outer[0].x, geometry.outer[0].y);
      geometry.outer.slice(1).forEach((point) => ctx.lineTo(point.x, point.y));
      ctx.closePath();
      ctx.moveTo(geometry.inner[0].x, geometry.inner[0].y);
      geometry.inner.slice(1).forEach((point) => ctx.lineTo(point.x, point.y));
      ctx.closePath();
      ctx.fillStyle = 'rgba(242,225,193,.56)';
      ctx.fill('evenodd');
      ctx.strokeStyle = '#76685a';
      ctx.lineWidth = 1.8;
      ctx.stroke();
      ctx.save();
      ctx.translate(geometry.pivot.x, geometry.pivot.y);
      ctx.rotate(geometry.angle);
      drawHorizontalMillimeterScale(ctx, 0, length, 0, -1, length, 140);
      drawVerticalMillimeterScale(ctx, 0, 0, -height, 1, height, 100);
      ctx.strokeStyle = '#64748b';
      ctx.globalAlpha = .66;
      rightMarker(ctx, { x:0, y:-30 }, { x:0, y:0 }, { x:30, y:0 });
      ctx.restore();
      drawRotateHandle(ctx, geometry.rotate);
      drawMoveHandle(ctx, geometry.move);
      drawResizeHandle(ctx, geometry.scale, geometry.angle);
      drawCloseHandle(ctx, geometry.close, '#111827', '#374151');
      drawRotationCenterMarker(ctx, geometry.pivot);
    }
    function drawRulerInstrument(ctx, geometry) {
      const length = geometry.length;
      const width = geometry.width;
      ctx.save();
      ctx.translate(geometry.pivot.x, geometry.pivot.y);
      ctx.rotate(geometry.angle);
      ctx.fillStyle = 'rgba(248,250,252,.68)';
      ctx.strokeStyle = '#64748b';
      ctx.lineWidth = 1.8;
      const bodyY = geometry.side === 'top' ? 0 : -width;
      ctx.beginPath();
      ctx.roundRect(0, bodyY, length, width, Math.min(8, width * .12));
      ctx.fill();
      ctx.stroke();
      // The 0 mark and graduated edge both pass through local (0,0), which is
      // also the real rotation center of the ruler.
      const scaleY = 0;
      const inward = geometry.side === 'top' ? 1 : -1;
      drawHorizontalMillimeterScale(ctx, 0, length, scaleY, inward, length, 200);
      ctx.save();
      ctx.globalAlpha = .22;
      const middleY = geometry.side === 'top' ? width / 2 : -width / 2;
      ctx.beginPath();
      ctx.moveTo(8, middleY);
      ctx.lineTo(length - 8, middleY);
      ctx.stroke();
      ctx.restore();
      ctx.restore();
      drawRotateHandle(ctx, geometry.rotate);
      drawMoveHandle(ctx, geometry.move);
      drawResizeHandle(ctx, geometry.scale, geometry.angle);
      // Rotate the edge-switch button by 90 degrees relative to the ruler.
      drawFlipHandle(ctx, geometry.toggle, geometry.angle + Math.PI / 2);
      drawCloseHandle(ctx, geometry.close, '#111827', '#374151');
      drawRotationCenterMarker(ctx, geometry.pivot);
    }

    function closeHandlePointForShape(shape) {
      const type = String(shape && shape.type || '');
      const a = px(shape && shape.a);
      const b = px(shape && shape.b);
      if (type === 'compass') {
        const geometry = compassGeometry(a, b);
        return {
          x:geometry.hinge.x + (a.x - geometry.hinge.x) * .34,
          y:geometry.hinge.y + (a.y - geometry.hinge.y) * .34
        };
      }
      if (type === 'protractor') {
        const base = Math.atan2(b.y - a.y, b.x - a.x);
        const innerRadius = Math.max(10, dist(a, b) * .23);
        return {
          x:a.x + innerRadius * Math.cos(base + Math.PI / 2),
          y:a.y + innerRadius * Math.sin(base + Math.PI / 2)
        };
      }
      const instrument = instrumentGeometry(shape);
      if (instrument) return instrument.close;
      const bounds = shapeBounds(shape);
      return { x:bounds.right + 14, y:bounds.top - 14 };
    }
    function drawCompassArc(ctx, center, radius, from, to, stroke, alpha = 1) {
      if (radius < 2) return;
      ctx.save();
      ctx.strokeStyle = stroke;
      ctx.lineWidth = 2.9;
      ctx.globalAlpha *= alpha;
      ctx.beginPath();
      ctx.arc(center.x, center.y, radius, from, to, (to - from) < 0);
      ctx.stroke();
      ctx.restore();
    }
    function pointInProtractor(point, center, edge) {
      const radius = dist(center, edge);
      if (radius < 6 || dist(point, center) > radius + 10) return false;
      const base = Math.atan2(edge.y - center.y, edge.x - center.x);
      const delta = normalizeAngle(Math.atan2(point.y - center.y, point.x - center.x) - base);
      return delta >= 0 && delta <= Math.PI;
    }
    function protractor(ctx, center, edge, stroke) {
      const radius = Math.max(1, dist(center, edge));
      const base = Math.atan2(edge.y - center.y, edge.x - center.x);
      const end = base + Math.PI;
      const labelSize = Math.max(7.5, Math.min(13, radius * .071));
      const outerLabelRadius = Math.max(18, radius * .79);
      const innerLabelRadius = Math.max(14, radius * .61);
      const guideOuter = Math.max(12, radius * .84);
      const guideInner = Math.max(10, radius * .51);
      ctx.save();
      ctx.globalAlpha *= .11;
      ctx.fillStyle = stroke;
      ctx.beginPath();
      ctx.moveTo(center.x, center.y);
      ctx.lineTo(center.x + radius * Math.cos(base), center.y + radius * Math.sin(base));
      ctx.arc(center.x, center.y, radius, base, end);
      ctx.closePath();
      ctx.fill();
      ctx.restore();
      ctx.beginPath();
      ctx.arc(center.x, center.y, radius, base, end);
      ctx.moveTo(center.x + radius * Math.cos(base), center.y + radius * Math.sin(base));
      ctx.lineTo(center.x + radius * Math.cos(end), center.y + radius * Math.sin(end));
      ctx.stroke();
      ctx.save();
      ctx.globalAlpha *= .42;
      ctx.lineWidth = Math.max(.9, ctx.lineWidth * .48);
      ctx.beginPath(); ctx.arc(center.x, center.y, guideOuter, base, end); ctx.stroke();
      ctx.beginPath(); ctx.arc(center.x, center.y, guideInner, base, end); ctx.stroke();
      ctx.restore();
      for (let degree = 0; degree <= 180; degree += 1) {
        const angle = base + degree * Math.PI / 180;
        const major = degree % 10 === 0;
        const medium = !major && degree % 5 === 0;
        const tick = major ? Math.min(19, radius * .15) : (medium ? Math.min(12, radius * .095) : Math.min(6, radius * .043));
        const outer = { x:center.x + radius * Math.cos(angle), y:center.y + radius * Math.sin(angle) };
        const inner = { x:center.x + (radius - tick) * Math.cos(angle), y:center.y + (radius - tick) * Math.sin(angle) };
        ctx.save();
        ctx.globalAlpha *= major ? 1 : (medium ? .80 : .52);
        ctx.lineWidth = major ? 1.75 : (medium ? 1.15 : .72);
        ctx.beginPath(); ctx.moveTo(outer.x, outer.y); ctx.lineTo(inner.x, inner.y); ctx.stroke();
        ctx.restore();
        if (major) {
          const radialStart = Math.max(9, radius * .28);
          ctx.save();
          ctx.globalAlpha *= .20;
          ctx.lineWidth = .75;
          ctx.beginPath();
          ctx.moveTo(center.x + radialStart * Math.cos(angle), center.y + radialStart * Math.sin(angle));
          ctx.lineTo(center.x + (radius - tick - 2) * Math.cos(angle), center.y + (radius - tick - 2) * Math.sin(angle));
          ctx.stroke();
          ctx.restore();
          ctx.save();
          ctx.font = `700 ${labelSize}px Arial, Helvetica, sans-serif`;
          ctx.textAlign = 'center';
          ctx.textBaseline = 'middle';
          ctx.fillStyle = '#dc2626';
          ctx.globalAlpha *= .98;
          ctx.fillText(String(180 - degree), center.x + outerLabelRadius * Math.cos(angle), center.y + outerLabelRadius * Math.sin(angle));
          ctx.fillStyle = '#111827';
          ctx.globalAlpha = .90;
          ctx.fillText(String(degree), center.x + innerLabelRadius * Math.cos(angle), center.y + innerLabelRadius * Math.sin(angle));
          ctx.restore();
        }
      }
      ctx.save();
      ctx.globalAlpha *= .72;
      ctx.beginPath();
      ctx.arc(center.x, center.y, Math.max(10, radius * .23), base, end);
      ctx.stroke();
      ctx.restore();
      ctx.beginPath();
      ctx.arc(center.x, center.y, Math.max(2.5, radius * .025), 0, Math.PI * 2);
      ctx.fillStyle = stroke;
      ctx.fill();
    }

    function drawEllipseArc(ctx, cx, cy, rx, ry, start, end, anticlockwise = false) {
      ctx.save();
      ctx.translate(cx, cy);
      ctx.scale(Math.max(.001, rx), Math.max(.001, ry));
      ctx.beginPath();
      ctx.arc(0, 0, 1, start, end, anticlockwise);
      ctx.restore();
      ctx.stroke();
    }
    function drawCuboid(ctx, a, b) {
      const left = Math.min(a.x, b.x), right = Math.max(a.x, b.x);
      const top = Math.min(a.y, b.y), bottom = Math.max(a.y, b.y);
      const width = Math.max(2, right - left), height = Math.max(2, bottom - top);
      const ox = Math.min(width * .23, height * .34);
      const oy = Math.min(height * .24, width * .18);
      const ftl = { x:left, y:top + oy }, ftr = { x:right - ox, y:top + oy };
      const fbr = { x:right - ox, y:bottom }, fbl = { x:left, y:bottom };
      const btl = { x:left + ox, y:top }, btr = { x:right, y:top };
      const bbr = { x:right, y:bottom - oy }, bbl = { x:left + ox, y:bottom - oy };
      ctx.setLineDash([]);
      ctx.beginPath();
      ctx.moveTo(ftl.x, ftl.y); ctx.lineTo(ftr.x, ftr.y); ctx.lineTo(fbr.x, fbr.y); ctx.lineTo(fbl.x, fbl.y); ctx.closePath();
      ctx.moveTo(ftl.x, ftl.y); ctx.lineTo(btl.x, btl.y); ctx.lineTo(btr.x, btr.y); ctx.lineTo(bbr.x, bbr.y); ctx.lineTo(fbr.x, fbr.y);
      ctx.moveTo(ftr.x, ftr.y); ctx.lineTo(btr.x, btr.y);
      ctx.stroke();
      ctx.save();
      ctx.setLineDash([4, 4]);
      ctx.globalAlpha *= .82;
      ctx.beginPath();
      ctx.moveTo(btl.x, btl.y); ctx.lineTo(bbl.x, bbl.y); ctx.lineTo(bbr.x, bbr.y);
      ctx.moveTo(bbl.x, bbl.y); ctx.lineTo(fbl.x, fbl.y);
      ctx.stroke();
      ctx.restore();
    }
    function drawCylinder(ctx, a, b) {
      const left = Math.min(a.x, b.x), right = Math.max(a.x, b.x);
      const top = Math.min(a.y, b.y), bottom = Math.max(a.y, b.y);
      const width = Math.max(2, right - left), height = Math.max(2, bottom - top);
      const cx = (left + right) / 2;
      const rx = width / 2;
      const ry = Math.min(Math.max(6, height * .12), Math.max(6, width * .22));
      const topCy = top + ry;
      const bottomCy = bottom - ry;
      ctx.setLineDash([]);
      ctx.beginPath(); ctx.ellipse(cx, topCy, rx, ry, 0, 0, Math.PI * 2); ctx.stroke();
      ctx.beginPath(); ctx.moveTo(left, topCy); ctx.lineTo(left, bottomCy); ctx.moveTo(right, topCy); ctx.lineTo(right, bottomCy); ctx.stroke();
      drawEllipseArc(ctx, cx, bottomCy, rx, ry, 0, Math.PI, false);
      ctx.save(); ctx.setLineDash([5, 4]); ctx.globalAlpha *= .78;
      drawEllipseArc(ctx, cx, bottomCy, rx, ry, Math.PI, Math.PI * 2, false);
      ctx.restore();
    }
    function drawCone(ctx, a, b) {
      const left = Math.min(a.x, b.x), right = Math.max(a.x, b.x);
      const top = Math.min(a.y, b.y), bottom = Math.max(a.y, b.y);
      const width = Math.max(2, right - left), height = Math.max(2, bottom - top);
      const cx = (left + right) / 2;
      const rx = width / 2;
      const ry = Math.min(Math.max(5, height * .11), Math.max(5, width * .20));
      const baseCy = bottom - ry;
      const apex = { x:cx, y:top };
      ctx.setLineDash([]);
      ctx.beginPath(); ctx.moveTo(apex.x, apex.y); ctx.lineTo(left, baseCy); ctx.moveTo(apex.x, apex.y); ctx.lineTo(right, baseCy); ctx.stroke();
      drawEllipseArc(ctx, cx, baseCy, rx, ry, 0, Math.PI, false);
      ctx.save(); ctx.setLineDash([5, 4]); ctx.globalAlpha *= .78;
      drawEllipseArc(ctx, cx, baseCy, rx, ry, Math.PI, Math.PI * 2, false);
      ctx.restore();
    }
    function drawSphere(ctx, a, b) {
      const left = Math.min(a.x, b.x), right = Math.max(a.x, b.x);
      const top = Math.min(a.y, b.y), bottom = Math.max(a.y, b.y);
      const width = Math.max(2, right - left), height = Math.max(2, bottom - top);
      const cx = (left + right) / 2, cy = (top + bottom) / 2;
      const rx = width / 2, ry = height / 2;
      ctx.setLineDash([]);
      ctx.beginPath(); ctx.ellipse(cx, cy, rx, ry, 0, 0, Math.PI * 2); ctx.stroke();
      const eqRy = Math.max(4, ry * .30);
      drawEllipseArc(ctx, cx, cy, rx, eqRy, 0, Math.PI, false);
      ctx.save(); ctx.setLineDash([5, 4]); ctx.globalAlpha *= .78;
      drawEllipseArc(ctx, cx, cy, rx, eqRy, Math.PI, Math.PI * 2, false);
      ctx.restore();
    }

    function drawShape(ctx, shape, preview = false) {
      const a = px(shape.a);
      const b = px(shape.b);
      const type = String(shape.type || 'segment');
      const stroke = String(shape.color || '#ef4444');
      ctx.save();
      ctx.strokeStyle = stroke;
      ctx.fillStyle = stroke;
      ctx.lineWidth = 2.8;
      ctx.lineCap = 'round';
      ctx.lineJoin = 'round';
      ctx.globalAlpha = preview ? .72 : 1;
      if (preview) ctx.setLineDash([8, 6]);
      if (['segment', 'ray', 'line'].includes(type)) {
        const ends = lineEnds(type, a, b, state.w, state.h);
        ctx.beginPath(); ctx.moveTo(ends[0].x, ends[0].y); ctx.lineTo(ends[1].x, ends[1].y); ctx.stroke();
        ctx.setLineDash([]);
        if (type === 'segment') {
          ends.forEach((point) => { ctx.beginPath(); ctx.arc(point.x, point.y, 3.1, 0, Math.PI * 2); ctx.fill(); });
        } else if (type === 'ray') {
          arrow(ctx, ends[0], ends[1]);
          ctx.beginPath(); ctx.arc(ends[0].x, ends[0].y, 3.1, 0, Math.PI * 2); ctx.fill();
        } else {
          arrow(ctx, ends[1], ends[0]);
          arrow(ctx, ends[0], ends[1]);
        }
      } else if (type === 'rectangle') {
        ctx.strokeRect(Math.min(a.x, b.x), Math.min(a.y, b.y), Math.abs(b.x - a.x), Math.abs(b.y - a.y));
      } else if (type === 'cuboid') {
        drawCuboid(ctx, a, b);
      } else if (type === 'cylinder') {
        drawCylinder(ctx, a, b);
      } else if (type === 'cone') {
        drawCone(ctx, a, b);
      } else if (type === 'sphere') {
        drawSphere(ctx, a, b);
      } else if (type === 'triangle') {
        const left = Math.min(a.x, b.x);
        const right = Math.max(a.x, b.x);
        const top = Math.min(a.y, b.y);
        const bottom = Math.max(a.y, b.y);
        ctx.beginPath(); ctx.moveTo((left + right) / 2, top); ctx.lineTo(right, bottom); ctx.lineTo(left, bottom); ctx.closePath(); ctx.stroke();
      } else if (type === 'rightTriangle') {
        const corner = { x:b.x, y:a.y };
        ctx.beginPath(); ctx.moveTo(a.x, a.y); ctx.lineTo(corner.x, corner.y); ctx.lineTo(b.x, b.y); ctx.closePath(); ctx.stroke();
        ctx.setLineDash([]);
        rightMarker(ctx, a, corner, b);
      } else if (type === 'circle') {
        ctx.beginPath(); ctx.arc(a.x, a.y, dist(a, b), 0, Math.PI * 2); ctx.stroke();
        ctx.setLineDash([]);
        drawCenterMarker(ctx, a, stroke);
      } else if (type === 'point') {
        ctx.setLineDash([]);
        ctx.beginPath(); ctx.arc(a.x, a.y, 4.4, 0, Math.PI * 2); ctx.fill();
      } else if (type === 'arcTrace') {
        const radius = dist(a, b);
        const segments = Array.isArray(shape.segments) ? shape.segments : [];
        ctx.setLineDash([]);
        segments.forEach((segment) => drawCompassArc(ctx, a, radius, Number(segment.from) || 0, Number(segment.to) || 0, stroke, preview ? .72 : 1));
        drawCenterMarker(ctx, a, stroke);
      } else if (type === 'compass') {
        const geometry = compassGeometry(a, b);
        const segments = Array.isArray(shape.segments) ? shape.segments : [];
        ctx.setLineDash([]);
        segments.forEach((segment) => drawCompassArc(ctx, a, geometry.radius, Number(segment.from) || 0, Number(segment.to) || 0, stroke, preview ? .72 : 1));
        /* Chỉ nét cung do compa vạch mới dùng màu bút. Hai chân, mũi chân và
           khớp compa luôn đỏ, không đổi theo bảng màu viết/vẽ. */
        ctx.strokeStyle = COMPASS_BODY_COLOR;
        ctx.fillStyle = COMPASS_BODY_COLOR;
        ctx.beginPath();
        ctx.moveTo(geometry.hinge.x, geometry.hinge.y); ctx.lineTo(a.x, a.y);
        ctx.moveTo(geometry.hinge.x, geometry.hinge.y); ctx.lineTo(b.x, b.y);
        ctx.stroke();
        ctx.beginPath();
        ctx.moveTo(a.x - 3, a.y + 6); ctx.lineTo(a.x, a.y); ctx.lineTo(a.x + 3, a.y + 6);
        ctx.moveTo(b.x - 4, b.y + 6); ctx.lineTo(b.x, b.y); ctx.lineTo(b.x + 4, b.y + 6);
        ctx.stroke();
        ctx.beginPath(); ctx.arc(geometry.hinge.x, geometry.hinge.y, 4.4, 0, Math.PI * 2); ctx.fill();
        drawRotationCenterMarker(ctx, a);
        drawHandle(ctx, b, COMPASS_BODY_COLOR, '#ffffff', 5);
        drawRotateHandle(ctx, compassRotateHandlePoint(a, b));
        drawMoveHandle(ctx, compassMoveHandlePoint(a, b));
        drawCloseHandle(ctx, closeHandlePointForShape(shape), '#111827', '#374151');
      } else if (type === 'protractor') {
        ctx.setLineDash([]);
        protractor(ctx, a, b, stroke);
        drawRotationCenterMarker(ctx, a);
        drawResizeHandle(ctx, b, Math.atan2(b.y - a.y, b.x - a.x));
        drawRotateHandle(ctx, protractorRotateHandlePoint(a, b));
        drawMoveHandle(ctx, protractorMoveHandlePoint(a, b));
        drawCloseHandle(ctx, closeHandlePointForShape(shape), '#111827', '#374151');
      } else if (type === 'setSquare') {
        const geometry = instrumentGeometry(shape);
        if (geometry) drawSetSquareInstrument(ctx, geometry);
      } else if (type === 'ruler') {
        const geometry = instrumentGeometry(shape);
        if (geometry) drawRulerInstrument(ctx, geometry);
      }
      ctx.restore();
    }
    function redraw() {
      const ctx = canvas.getContext('2d');
      if (!ctx) return;
      ctx.setTransform(1, 0, 0, 1, 0, 0);
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      ctx.save();
      ctx.setTransform(state.dpr, 0, 0, state.dpr, 0, 0);
      state.shapes.forEach((shape) => drawShape(ctx, shape, false));
      if (state.previewArc && state.previewArc.center && typeof state.previewArc.radius === 'number') {
        drawCompassArc(ctx, state.previewArc.center, state.previewArc.radius, state.previewArc.from, state.previewArc.to, state.previewArc.color || '#ef4444', .88);
      }
      if (state.autoSegment && state.autoSegment.a && state.autoSegment.b) {
        drawShape(ctx, {
          type:'segment',
          color:String(state.autoSegment.color || color()),
          a:state.autoSegment.a,
          b:state.autoSegment.b
        }, true);
      }
      if (state.dragging && state.start && state.end && state.tool && !INSTRUMENT_TYPES.has(state.tool)) {
        drawShape(ctx, { type:state.tool, color:color(), a:state.start, b:state.end }, true);
      }
      drawEdgeShadows(ctx);
      ctx.restore();
    }

    const closeMenu = () => { menu.hidden = true; button.setAttribute('aria-expanded', 'false'); };
    function positionMenu() {
      if (menu.hidden) return;
      if (options.menuPlacement === 'below') {
        menu.style.top = 'calc(100% + 9px)';
        menu.style.right = 'auto';
        menu.style.left = '50%';
        menu.style.transform = 'translateX(-50%)';
        return;
      }
      const max = Math.max(0, dock.clientHeight - menu.offsetHeight);
      const desired = Math.max(0, button.offsetTop - 36);
      menu.style.top = `${Math.min(desired, max)}px`;
      menu.style.right = 'calc(100% + 12px)';
      menu.style.left = 'auto';
      menu.style.transform = 'none';
    }
    function openMenu() {
      menu.hidden = false;
      button.setAttribute('aria-expanded', 'true');
      positionMenu();
    }
    function instrumentStorageKey(type) {
      return `mvip_geometry_${type}_size_v1`;
    }
    function readInstrumentSizeRatio(type) {
      const fallback = type === 'setSquare' ? .50 : .64;
      try {
        const stored = Number(localStorage.getItem(instrumentStorageKey(type)) || 0);
        if (Number.isFinite(stored) && stored > 0) return clamp(stored, .18, 1);
      } catch (_) {}
      return fallback;
    }
    function persistInstrumentSize(shape) {
      if (!shape || !INSTRUMENT_TYPES.has(String(shape.type || ''))) return;
      const geometry = instrumentGeometry(shape);
      const fullLength = geometry ? geometry.length : dist(px(shape.a), px(shape.b));
      const frame = visibleSurfaceFrame();
      const ratio = clamp(fullLength / Math.max(1, frame.width), .18, 1);
      try { localStorage.setItem(instrumentStorageKey(shape.type), String(ratio)); } catch (_) {}
    }
    function snapshot() {
      const drawingOnly = state.shapes.filter((shape) => UNDOABLE_SHAPE_TYPES.has(String(shape && shape.type || '')));
      const previous = cloneShapes(drawingOnly);
      previous.mvipUndoOrder = window.mvipDrawingHistory.stamp(surface);
      state.undo.push(previous);
      if (state.undo.length > 80) state.undo.shift();
      try { presenter.dispatchEvent(new CustomEvent('mvip-geometry-drawing-action')); } catch (_) {}
    }
    function restoreUndoableDrawingSnapshot(snapshotShapes) {
      const preserved = state.shapes.filter((shape) => !UNDOABLE_SHAPE_TYPES.has(String(shape && shape.type || '')));
      state.shapes = cloneShapes(snapshotShapes).concat(preserved);
    }
    function ensureProtractor(recordUndo = true) {
      const existing = state.shapes.findIndex((shape) => shape && shape.type === 'protractor');
      resize();
      const frame = visibleSurfaceFrame();
      const maximumRadius = Math.max(58, Math.min(frame.width * .42, Math.max(58, (frame.height - 34) * .46)));
      const radius = clamp(Math.min(frame.width * .28, frame.height * .34), 58, maximumRadius);
      const center = {
        x:clamp(frame.left + frame.width * .50, frame.left + radius + 18, Math.max(frame.left + radius + 18, frame.right - radius - 18)),
        y:clamp(frame.top + frame.height * .72, frame.top + radius + 22, Math.max(frame.top + radius + 22, frame.bottom - 18))
      };
      // Đặt đầu bán kính về bên trái để nửa đường tròn mở lên phía trên màn hình.
      const edge = { x:center.x - radius, y:center.y };
      const nextShape = {
        type:'protractor',
        color:color(),
        a:normFromSurfacePoint(center),
        b:normFromSurfacePointRaw(edge),
        segments:[]
      };
      if (existing >= 0) {
        const current = state.shapes[existing];
        const currentCenter = px(current.a);
        const currentRadius = dist(currentCenter, px(current.b));
        const centerVisible = currentCenter.x >= frame.left + 12 && currentCenter.x <= frame.right - 12
          && currentCenter.y >= frame.top + 12 && currentCenter.y <= frame.bottom - 12;
        const reasonableSize = currentRadius <= Math.max(64, Math.min(frame.width * .48, frame.height * .72));
        if (!centerVisible || !reasonableSize) state.shapes[existing] = nextShape;
        redraw();
        return existing;
      }
      state.shapes.push(nextShape);
      redraw();
      return state.shapes.length - 1;
    }

    function ensureInstrument(type, recordUndo = true) {
      const existing = state.shapes.findIndex((shape) => shape && shape.type === type);
      resize();
      const frame = visibleSurfaceFrame();
      const fullLength = clamp(
        readInstrumentSizeRatio(type) * Math.max(1, frame.width),
        150,
        Math.max(150, frame.width - 36)
      );
      const pivot = type === 'setSquare'
        ? { x:frame.left + frame.width * .28, y:frame.top + frame.height * .72 }
        : { x:frame.left + frame.width * .14, y:frame.top + frame.height * .66 };
      const angle = 0;
      const axisPoint = { x:pivot.x + Math.cos(angle) * fullLength, y:pivot.y + Math.sin(angle) * fullLength };
      const nextShape = {
        type,
        color:'#334155',
        a:normFromSurfacePoint(pivot),
        b:normFromSurfacePointRaw(axisPoint),
        segments:[],
        scaleSide:type === 'ruler' ? 'top' : undefined
      };
      if (existing >= 0) {
        const current = state.shapes[existing];
        const geometry = instrumentGeometry(current);
        const anchor = geometry ? geometry.center : px(current.a);
        const centerVisible = anchor.x >= frame.left + 10 && anchor.x <= frame.right - 10
          && anchor.y >= frame.top + 10 && anchor.y <= frame.bottom - 10;
        const reasonableSize = !geometry || geometry.length <= Math.max(170, frame.width * .94);
        if (!centerVisible || !reasonableSize) state.shapes[existing] = nextShape;
        redraw();
        return existing;
      }
      state.shapes.push(nextShape);
      redraw();
      return state.shapes.length - 1;
    }
    function sync() {
      const current = definition();
      button.setAttribute('aria-pressed', current ? 'true' : 'false');
      button.setAttribute('aria-label', current ? `Công cụ vẽ hình hiện tại: ${current.label}` : 'Hộp công cụ vẽ hình');
      button.title = current ? `Vẽ hình: ${current.label}. Bấm để đổi công cụ` : 'Hộp công cụ vẽ hình';
      const icon = current ? ICONS[current.id] : TOOLBOX_ICON;
      const label = current ? current.label : 'Vẽ hình';
      button.innerHTML = options.showButtonLabel ? `${icon}<span>${label}</span>` : icon;
      menu.querySelectorAll('[data-geometry-tool]').forEach((choice) => {
        choice.setAttribute('aria-checked', choice.getAttribute('data-geometry-tool') === state.tool ? 'true' : 'false');
      });
      canvas.classList.toggle('is-active', !!current);
      canvas.style.cursor = current && ['compass', 'protractor', 'setSquare', 'ruler'].includes(current.id)
        ? 'default'
        : 'crosshair';
    }
    function changeTool(id) {
      if (state.autoSegment) finishAutoSegment(false);
      state.tool = TOOLS.some((item) => item.id === id) ? id : '';
      const selectPenAfterShowingInstrument = ['protractor', 'setSquare', 'ruler'].includes(state.tool);
      try { api.tool('cursor'); } catch (_) {}
      resize();
      /* Compa xuất hiện giống index.htmlBS26: chọn Compa rồi kéo để xác định
         vị trí tâm và độ mở, không tự sinh một compa lớn giữa màn hình. */
      if (state.tool === 'protractor') ensureProtractor(false);
      else if (INSTRUMENT_TYPES.has(state.tool)) ensureInstrument(state.tool, false);
      if (selectPenAfterShowingInstrument) {
        /* Thước đã được dựng xong nên trả canvas hình học về chế độ điều khiển
           nền, rồi bật ngay Bút viết để người dùng có thể kẻ mà không cần bấm
           thêm một lần. Các nút di chuyển/xoay/co giãn vẫn do surface bắt sự kiện. */
        state.tool = '';
        try { api.tool('pen'); } catch (_) {}
      }
      closeMenu();
      sync();
      redraw();
      return state.tool;
    }
    function undo() {
      if (!state.undo.length) return false;
      const previousDrawingState = state.undo.pop();
      restoreUndoableDrawingSnapshot(previousDrawingState);
      state.interaction = null;
      state.previewArc = null;
      redraw();
      return true;
    }
    function clear(resetTool = false) {
      state.shapes = [];
      state.undo = [];
      state.edgeShadows = [];
      state.dragging = false;
      state.erasing = false;
      state.eraseUndoChanged = false;
      state.pointerId = null;
      state.start = null;
      state.end = null;
      state.interaction = null;
      state.previewArc = null;
      state.autoSegment = null;
      state.dragCaptureTarget = null;
      if (resetTool) state.tool = '';
      redraw();
      sync();
    }
    function finishCreate(event) {
      if (!state.dragging || (event && state.pointerId !== null && event.pointerId !== state.pointerId)) return;
      if (event) {
        event.preventDefault();
        event.stopPropagation();
        const captureTarget = state.dragCaptureTarget || canvas;
        try { captureTarget.releasePointerCapture(event.pointerId); } catch (_) {}
      }
      const a = state.start;
      const b = state.end;
      const type = state.tool;
      state.dragging = false;
      state.pointerId = null;
      state.start = null;
      state.end = null;
      state.dragCaptureTarget = null;
      const distance = (a && b) ? dist(px(a), px(b)) : 0;
      if (a && b && type && !INSTRUMENT_TYPES.has(type) && (type === 'point' || distance >= 5)) {
        if (UNDOABLE_SHAPE_TYPES.has(type)) snapshot();
        const shape = { type, color:color(), a, b:type === 'point' ? { x:a.x, y:a.y } : b, segments:[] };
        if (type === 'compass') shape.segments = [];
        state.shapes.push(shape);
      }
      redraw();
    }

    function shapeBounds(shape) {
      const a = px(shape.a);
      const b = px(shape.b);
      const type = String(shape.type || '');
      const instrument = instrumentGeometry(shape);
      if (instrument) {
        const extra = [instrument.rotate, instrument.scale, instrument.close, instrument.move].concat(instrument.toggle ? [instrument.toggle] : []);
        const vertices = instrument.outer;
        const xs = vertices.map((point) => point.x).concat(extra.map((point) => point.x));
        const ys = vertices.map((point) => point.y).concat(extra.map((point) => point.y));
        return { left:Math.min(...xs), top:Math.min(...ys), right:Math.max(...xs), bottom:Math.max(...ys) };
      }
      if (['circle', 'compass', 'protractor', 'arcTrace'].includes(type)) {
        const radius = dist(a, b);
        return { left:a.x - radius, top:a.y - radius, right:a.x + radius, bottom:a.y + radius };
      }
      if (type === 'point') return { left:a.x - 8, top:a.y - 8, right:a.x + 8, bottom:a.y + 8 };
      if (['line', 'ray'].includes(type)) {
        const ends = lineEnds(type, a, b, state.w, state.h);
        return {
          left:Math.min(ends[0].x, ends[1].x),
          top:Math.min(ends[0].y, ends[1].y),
          right:Math.max(ends[0].x, ends[1].x),
          bottom:Math.max(ends[0].y, ends[1].y)
        };
      }
      return { left:Math.min(a.x, b.x), top:Math.min(a.y, b.y), right:Math.max(a.x, b.x), bottom:Math.max(a.y, b.y) };
    }
    function arcTraceHit(shape, point, radiusTolerance) {
      const center = px(shape.a);
      const edge = px(shape.b);
      const radius = dist(center, edge);
      if (dist(point, center) <= Math.max(7, radiusTolerance)) return true;
      if (Math.abs(dist(point, center) - radius) > radiusTolerance) return false;
      const angle = Math.atan2(point.y - center.y, point.x - center.x);
      const segments = Array.isArray(shape.segments) ? shape.segments : [];
      return segments.some((segment) => angleOnDirectedSweep(angle, Number(segment && segment.from) || 0, Number(segment && segment.to) || 0));
    }
    function hit(shape, point, radius) {
      const a = px(shape.a);
      const b = px(shape.b);
      const type = String(shape.type || '');
      const instrument = instrumentGeometry(shape);
      if (instrument) {
        return dist(point, instrument.close) <= Math.max(22, radius)
          || dist(point, instrument.rotate) <= Math.max(24, radius)
          || dist(point, instrument.scale) <= Math.max(24, radius)
          || dist(point, instrument.move) <= Math.max(24, radius)
          || (!!instrument.toggle && dist(point, instrument.toggle) <= Math.max(24, radius))
          || pointInPolygon(point, instrument.outer)
          || instrument.snapEdges.some((edge) => pointSegmentDistance(point, edge[0], edge[1]) <= radius);
      }
      if (type === 'compass') {
        const geometry = compassGeometry(a, b);
        const rotate = compassRotateHandlePoint(a, b);
        const move = compassMoveHandlePoint(a, b);
        const close = closeHandlePointForShape(shape);
        return dist(point, close) <= Math.max(22, radius)
          || dist(point, rotate) <= Math.max(30, radius)
          || dist(point, move) <= Math.max(26, radius)
          || dist(point, a) <= radius
          || dist(point, b) <= radius
          || dist(point, geometry.hinge) <= radius
          || pointSegmentDistance(point, geometry.hinge, a) <= radius
          || pointSegmentDistance(point, geometry.hinge, b) <= radius
          || Math.abs(dist(point, a) - geometry.radius) <= radius;
      }
      if (type === 'protractor') {
        const rotate = protractorRotateHandlePoint(a, b);
        const move = protractorMoveHandlePoint(a, b);
        const close = closeHandlePointForShape(shape);
        return dist(point, close) <= Math.max(22, radius)
          || dist(point, rotate) <= Math.max(26, radius)
          || dist(point, move) <= Math.max(26, radius)
          || pointInProtractor(point, a, b)
          || dist(point, a) <= radius
          || dist(point, b) <= radius
          || Math.abs(dist(point, a) - dist(a, b)) <= radius;
      }
      const bounds = shapeBounds(shape);
      if (point.x < bounds.left - radius || point.x > bounds.right + radius || point.y < bounds.top - radius || point.y > bounds.bottom + radius) return false;
      if (['segment', 'ray', 'line'].includes(type)) {
        const ends = lineEnds(type, a, b, state.w, state.h);
        return pointSegmentDistance(point, ends[0], ends[1]) <= radius;
      }
      if (type === 'circle') return Math.abs(dist(point, a) - dist(a, b)) <= radius || dist(point, a) <= radius || dist(point, b) <= radius;
      if (type === 'arcTrace') return arcTraceHit(shape, point, radius);
      if (type === 'rectangle') {
        const vertices = [
          { x:bounds.left, y:bounds.top }, { x:bounds.right, y:bounds.top },
          { x:bounds.right, y:bounds.bottom }, { x:bounds.left, y:bounds.bottom }
        ];
        return vertices.some((vertex, index) => pointSegmentDistance(point, vertex, vertices[(index + 1) % 4]) <= radius);
      }
      if (type === 'triangle') {
        const vertices = [
          { x:(bounds.left + bounds.right) / 2, y:bounds.top },
          { x:bounds.right, y:bounds.bottom },
          { x:bounds.left, y:bounds.bottom }
        ];
        return vertices.some((vertex, index) => pointSegmentDistance(point, vertex, vertices[(index + 1) % 3]) <= radius);
      }
      if (type === 'rightTriangle') {
        const vertices = [a, { x:b.x, y:a.y }, b];
        return vertices.some((vertex, index) => pointSegmentDistance(point, vertex, vertices[(index + 1) % 3]) <= radius);
      }
      if (type === 'point') return dist(point, a) <= Math.max(radius, 8);
      return true;
    }
    function findTopShapeIndexOfType(type, point) {
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (shape && shape.type === type && hit(shape, point, 18)) return index;
      }
      return -1;
    }
    function findTopInteractiveToolIndex(point) {
      const toolTypes = new Set(['compass', 'protractor', 'setSquare', 'ruler']);
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (shape && toolTypes.has(String(shape.type || '')) && hit(shape, point, 18)) return index;
      }
      return -1;
    }
    function findNearestRotateHandleIndex(type, point, maxDistance) {
      let best = -1;
      let bestDistance = Math.max(18, Number(maxDistance) || 32);
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || shape.type !== type) continue;
        const a = px(shape.a);
        const b = px(shape.b);
        const handle = type === 'compass' ? compassRotateHandlePoint(a, b) : protractorRotateHandlePoint(a, b);
        const current = dist(point, handle);
        if (current <= bestDistance) { best = index; bestDistance = current; }
      }
      return best;
    }
    function findNearestCloseHandleIndex(type, point, maxDistance) {
      let best = -1;
      let bestDistance = Math.max(16, Number(maxDistance) || 24);
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || shape.type !== type) continue;
        const current = dist(point, closeHandlePointForShape(shape));
        if (current <= bestDistance) { best = index; bestDistance = current; }
      }
      return best;
    }
    function moveHandlePointForShape(shape) {
      if (!shape) return null;
      const type = String(shape.type || '');
      const a = px(shape.a);
      const b = px(shape.b);
      if (type === 'compass') return compassMoveHandlePoint(a, b);
      if (type === 'protractor') return protractorMoveHandlePoint(a, b);
      const geometry = instrumentGeometry(shape);
      return geometry ? geometry.move : null;
    }
    function findNearestMoveHandleIndex(point, maxDistance = 22) {
      let best = -1;
      let bestDistance = Math.max(18, Number(maxDistance) || 22);
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || !['compass', 'protractor', 'setSquare', 'ruler'].includes(String(shape.type || ''))) continue;
        const handle = moveHandlePointForShape(shape);
        if (!handle) continue;
        const current = dist(point, handle);
        if (current <= bestDistance) { best = index; bestDistance = current; }
      }
      return best;
    }
    function removeShapeWithOptionalTrace(index) {
      const shape = state.shapes[index];
      if (!shape) return false;
      clearEdgeShadowsForShape(shape);
      persistInstrumentSize(shape);
      const additions = [];
      if (shape.type === 'compass' && Array.isArray(shape.segments) && shape.segments.length) {
        additions.push({
          type:'arcTrace',
          color:color(),
          a:{ x:Number(shape.a && shape.a.x) || 0, y:Number(shape.a && shape.a.y) || 0 },
          b:{ x:Number(shape.b && shape.b.x) || 0, y:Number(shape.b && shape.b.y) || 0 },
          segments:shape.segments.map((segment) => ({ from:Number(segment && segment.from) || 0, to:Number(segment && segment.to) || 0 }))
        });
      }
      state.shapes.splice(index, 1);
      if (additions.length) state.shapes.push(...additions);
      redraw();
      return true;
    }
    function getCompassAction(shape, point) {
      const a = px(shape.a);
      const b = px(shape.b);
      const rotate = compassRotateHandlePoint(a, b);
      const move = compassMoveHandlePoint(a, b);
      if (dist(point, move) <= 20) return 'move';
      if (dist(point, rotate) <= 20) return 'rotate';
      if (dist(point, b) <= 16) return 'resize';
      /* Chỉ nút mũi tên bốn chiều mới được phép di chuyển compa. */
      return '';
    }
    function getProtractorAction(shape, point) {
      const a = px(shape.a);
      const b = px(shape.b);
      const rotate = protractorRotateHandlePoint(a, b);
      const move = protractorMoveHandlePoint(a, b);
      if (dist(point, move) <= 20) return 'move';
      if (dist(point, rotate) <= 20) return 'rotate';
      if (dist(point, b) <= 18) return 'resize';
      /* Không kéo thân thước hoặc điểm tâm để di chuyển; chỉ dùng nút bốn chiều. */
      return '';
    }
    function getInstrumentAction(shape, point) {
      const geometry = instrumentGeometry(shape);
      if (!geometry) return '';
      if (dist(point, geometry.close) <= 18) return 'close';
      if (geometry.toggle && dist(point, geometry.toggle) <= 18) return 'toggleSide';
      if (dist(point, geometry.move) <= 22) return 'move';
      if (dist(point, geometry.rotate) <= 20) return 'rotate';
      if (dist(point, geometry.scale) <= 21) return 'resize';
      /* Nhấn vào thân eke hoặc thước thẳng không được di chuyển dụng cụ. */
      return '';
    }

    function universalControlAt(point) {
      const supported = new Set(['compass', 'protractor', 'setSquare', 'ruler']);
      // Rotation-center circles are drawing anchors, not control buttons. When
      // a straight geometry tool is active, reserve a wider zone around the
      // marker so no nearby instrument handle can steal the pointerdown.
      const pivotDrawingActive = ['segment', 'ray', 'line'].includes(state.tool);
      const pivotExclusionRadius = pivotDrawingActive ? 18 : 9;
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || !supported.has(String(shape.type || ''))) continue;
        const center = rotationCenterForShape(shape);
        if (center && dist(point, center) <= pivotExclusionRadius) return null;
      }
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        const type = String(shape && shape.type || '');
        if (!shape || !supported.has(type)) continue;
        const candidates = [];
        if (type === 'compass') {
          const a = px(shape.a);
          const b = px(shape.b);
          candidates.push(
            { action:'close', handle:closeHandlePointForShape(shape), radius:19 },
            { action:'move', handle:compassMoveHandlePoint(a, b), radius:21 },
            { action:'rotate', handle:compassRotateHandlePoint(a, b), radius:21 },
            { action:'resize', handle:b, radius:18 }
          );
        } else if (type === 'protractor') {
          const a = px(shape.a);
          const b = px(shape.b);
          candidates.push(
            { action:'close', handle:closeHandlePointForShape(shape), radius:19 },
            { action:'move', handle:protractorMoveHandlePoint(a, b), radius:21 },
            { action:'rotate', handle:protractorRotateHandlePoint(a, b), radius:21 },
            { action:'resize', handle:b, radius:19 }
          );
        } else {
          const geometry = instrumentGeometry(shape);
          if (!geometry) continue;
          candidates.push(
            { action:'close', handle:geometry.close, radius:19 },
            ...(geometry.toggle ? [{ action:'toggleSide', handle:geometry.toggle, radius:19 }] : []),
            { action:'rotate', handle:geometry.rotate, radius:21 },
            { action:'resize', handle:geometry.scale, radius:22 },
            { action:'move', handle:geometry.move, radius:22 }
          );
        }
        let best = null;
        candidates.forEach((candidate) => {
          if (!candidate.handle) return;
          const distance = dist(point, candidate.handle);
          if (distance > candidate.radius) return;
          if (!best || distance < best.distance) best = { ...candidate, distance };
        });
        if (best) return { index, type, action:best.action };
      }
      return null;
    }

    function universalInteractionKind(type, action) {
      if (type === 'compass') {
        return action === 'move' ? 'moveCompass'
          : (action === 'resize' ? 'resizeCompass' : (action === 'rotate' ? 'rotateCompass' : ''));
      }
      if (type === 'protractor') {
        return action === 'move' ? 'moveProtractor'
          : (action === 'resize' ? 'resizeProtractor' : (action === 'rotate' ? 'rotateProtractor' : ''));
      }
      if (type === 'setSquare' || type === 'ruler') {
        return action === 'move' ? 'moveInstrument'
          : (action === 'resize' ? 'resizeInstrument' : (action === 'rotate' ? 'rotateInstrument' : ''));
      }
      return '';
    }

    function beginInteraction(kind, index, point, event, captureTarget = canvas) {
      const shape = state.shapes[index];
      if (!shape) return false;
      // Chốt bảo vệ cuối: mọi thao tác di chuyển chỉ được khởi tạo khi chuột trái
      // thực sự nằm trên nút mũi tên bốn chiều của đúng dụng cụ.
      if (['moveCompass', 'moveProtractor', 'moveInstrument'].includes(kind)) {
        const moveHandle = moveHandlePointForShape(shape);
        const moveRadius = shape.type === 'setSquare' || shape.type === 'ruler' ? 24 : 23;
        if (!moveHandle || dist(point, moveHandle) > moveRadius) return false;
      }
      if (INSTRUMENT_TYPES.has(String(shape.type || ''))) clearEdgeShadowsForShape(shape);
      state.dragging = false;
      state.start = null;
      state.end = null;
      state.previewArc = null;
      if (kind === 'moveCompass' && shape.type === 'compass' && Array.isArray(shape.segments) && shape.segments.length) {
        state.shapes.push({
          type:'arcTrace',
          color:color(),
          a:{ x:Number(shape.a && shape.a.x) || 0, y:Number(shape.a && shape.a.y) || 0 },
          b:{ x:Number(shape.b && shape.b.x) || 0, y:Number(shape.b && shape.b.y) || 0 },
          segments:shape.segments.map((segment) => ({ from:Number(segment && segment.from) || 0, to:Number(segment && segment.to) || 0 }))
        });
        shape.segments = [];
      }
      state.pointerId = event.pointerId;
      state.interaction = {
        kind,
        index,
        startPointer:{ x:point.x, y:point.y },
        startShape:cloneShapes([shape])[0],
        captureTarget
      };
      if (kind === 'rotateCompass') {
        const a = px(shape.a);
        const b = px(shape.b);
        const startAngle = Math.atan2(b.y - a.y, b.x - a.x);
        state.interaction.startAngle = startAngle;
        state.interaction.lastRaw = startAngle;
        state.interaction.unwrappedAngle = startAngle;
        state.interaction.radius = dist(a, b);
        state.previewArc = { center:a, radius:dist(a, b), from:startAngle, to:startAngle, color:color() };
      } else if (kind === 'resizeCompass') {
        const a = px(shape.a);
        const b = px(shape.b);
        state.interaction.startAngle = Math.atan2(b.y - a.y, b.x - a.x);
      } else if (kind === 'rotateProtractor') {
        const a = px(shape.a);
        const b = px(shape.b);
        state.interaction.radius = dist(a, b);
      } else if (kind === 'resizeProtractor') {
        const a = px(shape.a);
        const b = px(shape.b);
        state.interaction.baseAngle = Math.atan2(b.y - a.y, b.x - a.x);
      } else if (kind === 'rotateInstrument' || kind === 'resizeInstrument') {
        const a = px(shape.a);
        const b = px(shape.b);
        state.interaction.radius = dist(a, b);
        state.interaction.baseAngle = Math.atan2(b.y - a.y, b.x - a.x);
      }
      try { captureTarget.setPointerCapture(event.pointerId); } catch (_) {}
      return true;
    }
    function updateInteraction(event) {
      const interaction = state.interaction;
      if (!interaction || event.pointerId !== state.pointerId) return false;
      event.preventDefault();
      event.stopPropagation();
      const shape = state.shapes[interaction.index];
      if (!shape) return false;
      const point = px(norm(event));
      const dx = point.x - interaction.startPointer.x;
      const dy = point.y - interaction.startPointer.y;
      if (['moveCompass', 'moveProtractor'].includes(interaction.kind)) {
        const original = interaction.startShape;
        const a = px(original.a);
        const b = px(original.b);
        shape.a = normFromSurfacePoint({ x:a.x + dx, y:a.y + dy });
        shape.b = normFromSurfacePoint({ x:b.x + dx, y:b.y + dy });
      } else if (interaction.kind === 'moveInstrument') {
        const original = interaction.startShape;
        const a = px(original.a);
        const b = px(original.b);
        shape.a = normFromSurfacePointRaw({ x:a.x + dx, y:a.y + dy });
        shape.b = normFromSurfacePointRaw({ x:b.x + dx, y:b.y + dy });
      } else if (interaction.kind === 'rotateCompass') {
        const center = px(shape.a);
        const rawAngle = Math.atan2(point.y - center.y, point.x - center.x);
        const delta = shortestSignedAngleDelta(interaction.lastRaw, rawAngle);
        interaction.unwrappedAngle += delta;
        interaction.lastRaw = rawAngle;
        const radius = Math.max(12, Number(interaction.radius) || dist(center, point));
        shape.b = normFromSurfacePoint({ x:center.x + Math.cos(rawAngle) * radius, y:center.y + Math.sin(rawAngle) * radius });
        state.previewArc = { center, radius, from:interaction.startAngle, to:interaction.unwrappedAngle, color:color() };
      } else if (interaction.kind === 'resizeCompass') {
        const center = px(shape.a);
        const rawAngle = Math.atan2(point.y - center.y, point.x - center.x);
        const radius = Math.max(12, dist(center, point));
        shape.b = normFromSurfacePoint({ x:center.x + Math.cos(rawAngle) * radius, y:center.y + Math.sin(rawAngle) * radius });
      } else if (interaction.kind === 'rotateProtractor') {
        const center = px(shape.a);
        const radius = Math.max(26, Number(interaction.radius) || dist(center, point));
        const rawAngle = Math.atan2(point.y - center.y, point.x - center.x);
        shape.b = normFromSurfacePoint({ x:center.x + Math.cos(rawAngle) * radius, y:center.y + Math.sin(rawAngle) * radius });
      } else if (interaction.kind === 'resizeProtractor') {
        const center = px(shape.a);
        const radius = Math.max(26, dist(center, point));
        const angle = Number(interaction.baseAngle) || Math.atan2(px(shape.b).y - center.y, px(shape.b).x - center.x);
        shape.b = normFromSurfacePoint({ x:center.x + Math.cos(angle) * radius, y:center.y + Math.sin(angle) * radius });
      } else if (interaction.kind === 'rotateInstrument') {
        const center = px(shape.a);
        const radius = Math.max(44, Number(interaction.radius) || dist(center, point));
        const angle = Math.atan2(point.y - center.y, point.x - center.x);
        shape.b = normFromSurfacePointRaw({ x:center.x + Math.cos(angle) * radius, y:center.y + Math.sin(angle) * radius });
      } else if (interaction.kind === 'resizeInstrument') {
        const center = px(shape.a);
        const angle = Number(interaction.baseAngle) || 0;
        const ux = Math.cos(angle);
        const uy = Math.sin(angle);
        const projection = Math.abs((point.x - center.x) * ux + (point.y - center.y) * uy);
        const radius = clamp(Math.max(52, projection), 52, Math.max(70, state.w));
        shape.b = normFromSurfacePointRaw({ x:center.x + ux * radius, y:center.y + uy * radius });
      }
      redraw();
      return true;
    }
    function finishInteraction(event) {
      const interaction = state.interaction;
      if (!interaction || (event && state.pointerId !== null && event.pointerId !== state.pointerId)) return false;
      if (event) {
        event.preventDefault();
        event.stopPropagation();
        const captureTarget = interaction.captureTarget || canvas;
        try { captureTarget.releasePointerCapture(event.pointerId); } catch (_) {}
      }
      if (interaction.kind === 'rotateCompass') {
        const shape = state.shapes[interaction.index];
        if (shape && state.previewArc && Math.abs((state.previewArc.to || 0) - (state.previewArc.from || 0)) > .02) {
          snapshot();
          state.shapes.push({
            type:'arcTrace',
            color:String(state.previewArc.color || color()),
            a:{ x:Number(shape.a && shape.a.x) || 0, y:Number(shape.a && shape.a.y) || 0 },
            b:{ x:Number(shape.b && shape.b.x) || 0, y:Number(shape.b && shape.b.y) || 0 },
            segments:[{ from:Number(state.previewArc.from) || 0, to:Number(state.previewArc.to) || 0 }]
          });
        }
      }
      if (['resizeInstrument', 'rotateInstrument', 'moveInstrument'].includes(interaction.kind)) {
        persistInstrumentSize(state.shapes[interaction.index]);
      }
      state.interaction = null;
      state.previewArc = null;
      state.pointerId = null;
      redraw();
      return true;
    }

    function instrumentSnapEdges(shape) {
      const geometry = instrumentGeometry(shape);
      return geometry ? geometry.snapEdges : [];
    }
    function rotationCenterForShape(shape) {
      if (!shape) return null;
      const type = String(shape.type || '');
      if (type === 'compass' || type === 'protractor') return px(shape.a);
      if (type === 'setSquare' || type === 'ruler') {
        const geometry = instrumentGeometry(shape);
        return geometry ? geometry.pivot : null;
      }
      return null;
    }
    function rotationPivotGuideAt(point, tolerance = 12) {
      const supported = new Set(['compass', 'protractor', 'setSquare', 'ruler']);
      const hitRadius = Math.max(8, Number(tolerance) || 12);
      let best = null;
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        const type = String(shape && shape.type || '');
        if (!shape || !supported.has(type)) continue;
        const center = rotationCenterForShape(shape);
        if (!center) continue;
        const distance = dist(point, center);
        if (distance > hitRadius) continue;
        if (!best || distance < best.distance) best = { index, type, center, distance };
      }
      if (!best) return null;
      const anchor = normFromSurfacePoint(best.center);
      return {
        kind:'rotationPivot',
        shapeIndex:best.index,
        toolType:best.type,
        center:anchor,
        anchor,
        mode:'pending',
        direction:null
      };
    }
    function polygonCenter(points) {
      const list = Array.isArray(points) ? points.filter(Boolean) : [];
      if (!list.length) return { x:0, y:0 };
      const total = list.reduce((sum, point) => ({ x:sum.x + point.x, y:sum.y + point.y }), { x:0, y:0 });
      return { x:total.x / list.length, y:total.y / list.length };
    }
    function pointInInstrumentMaterial(shape, point) {
      const geometry = instrumentGeometry(shape);
      if (!geometry || !pointInPolygon(point, geometry.outer)) return false;
      if (shape && shape.type === 'setSquare' && Array.isArray(geometry.inner) && pointInPolygon(point, geometry.inner)) {
        return false;
      }
      return true;
    }

    function edgeOutsideNormal(shape, edgeIndex, edge, pointer) {
      if (!shape || !edge || !edge[0] || !edge[1]) return { x:0, y:0 };
      const dx = edge[1].x - edge[0].x;
      const dy = edge[1].y - edge[0].y;
      const length = Math.hypot(dx, dy);
      if (length < 1e-7) return { x:0, y:0 };
      let normal = { x:-dy / length, y:dx / length };
      const projection = projectPointToSegment(pointer, edge[0], edge[1]).point;
      const plusSample = { x:projection.x + normal.x * 3, y:projection.y + normal.y * 3 };
      const minusSample = { x:projection.x - normal.x * 3, y:projection.y - normal.y * 3 };
      const plusInside = pointInInstrumentMaterial(shape, plusSample);
      const minusInside = pointInInstrumentMaterial(shape, minusSample);
      if (plusInside && !minusInside) {
        normal = { x:-normal.x, y:-normal.y };
      } else if (plusInside === minusInside) {
        const geometry = instrumentGeometry(shape);
        let reference = geometry ? polygonCenter(geometry.outer) : projection;
        let pointTowardReference = false;
        if (geometry && shape.type === 'setSquare' && edgeIndex >= 3 && Array.isArray(geometry.inner)) {
          reference = polygonCenter(geometry.inner);
          pointTowardReference = true;
        }
        const towardReference = (reference.x - projection.x) * normal.x + (reference.y - projection.y) * normal.y;
        if ((pointTowardReference && towardReference < 0) || (!pointTowardReference && towardReference > 0)) {
          normal = { x:-normal.x, y:-normal.y };
        }
      }
      return normal;
    }

    function scheduleShadowRedraw() {
      if (state.shadowRedrawFrame) return;
      state.shadowRedrawFrame = requestAnimationFrame(() => {
        state.shadowRedrawFrame = 0;
        redraw();
      });
    }

    function clearEdgeShadowsForShape(shape) {
      if (!shape || !state.edgeShadows.length) return;
      const next = state.edgeShadows.filter((shadow) => shadow && shadow.shape !== shape);
      if (next.length === state.edgeShadows.length) return;
      state.edgeShadows = next;
      if (state.shadowRedrawFrame) {
        cancelAnimationFrame(state.shadowRedrawFrame);
        state.shadowRedrawFrame = 0;
      }
      redraw();
    }

    function extendEdgeShadow(shape, guide, normalizedPoint) {
      if (!shape || !guide || !Number.isInteger(guide.edgeIndex) || !normalizedPoint) return;
      let shadow = state.edgeShadows.find((item) => item && item.id === guide.shadowId);
      if (!shadow) {
        const edges = instrumentSnapEdges(shape);
        const edge = edges[guide.edgeIndex];
        if (!edge) return;
        let nativeTool = 'pen';
        try { nativeTool = String(api.tool() || 'pen'); } catch (_) {}
        const highlighter = nativeTool === 'highlighter';
        shadow = {
          id:state.nextEdgeShadowId++,
          mvipUndoOrder:window.mvipDrawingHistory.stamp(surface),
          shape,
          edgeIndex:guide.edgeIndex,
          a:{
            x:Number.isFinite(Number(guide.anchor && guide.anchor.x)) ? Number(guide.anchor.x) : (Number(normalizedPoint.x) || 0),
            y:Number.isFinite(Number(guide.anchor && guide.anchor.y)) ? Number(guide.anchor.y) : (Number(normalizedPoint.y) || 0)
          },
          b:{ x:Number(normalizedPoint.x) || 0, y:Number(normalizedPoint.y) || 0 },
          normal:guide.outsideNormal || edgeOutsideNormal(shape, guide.edgeIndex, edge, px(normalizedPoint)),
          color:color(),
          width:highlighter ? 22 : 2.6,
          alpha:highlighter ? .32 : 1
        };
        guide.shadowId = shadow.id;
        state.edgeShadows.push(shadow);
        if (state.edgeShadows.length > 80) state.edgeShadows.shift();
      } else {
        shadow.b = { x:Number(normalizedPoint.x) || 0, y:Number(normalizedPoint.y) || 0 };
      }
      scheduleShadowRedraw();
    }

    function drawEdgeShadows(ctx) {
      if (!ctx || !state.edgeShadows.length) return;
      state.edgeShadows = state.edgeShadows.filter((shadow) => shadow && state.shapes.includes(shadow.shape));
      state.edgeShadows.forEach((shadow) => {
        const a = px(shadow.a);
        const b = px(shadow.b);
        const normal = shadow.normal || { x:0, y:0 };
        /* Nét bóng chỉ là lớp hiển thị tạm trên dụng cụ. Tâm của nó cách cạnh
           đúng 0,5 CSS px về phía ngoài; nét mực thật vẫn nằm đúng trên cạnh. */
        const offsetX = Number(normal.x) * .5;
        const offsetY = Number(normal.y) * .5;
        ctx.save();
        ctx.strokeStyle = String(shadow.color || '#ef4444');
        ctx.lineWidth = Number(shadow.width) || 2.6;
        ctx.globalAlpha = Number.isFinite(Number(shadow.alpha)) ? Number(shadow.alpha) : 1;
        ctx.lineCap = 'round';
        ctx.lineJoin = 'round';
        ctx.beginPath();
        ctx.moveTo(a.x + offsetX, a.y + offsetY);
        ctx.lineTo(b.x + offsetX, b.y + offsetY);
        ctx.stroke();
        ctx.restore();
      });
    }

    function edgeInkOffset(shape, edgeIndex, edge, pointer, distancePx = 0) {
      if (!shape || !edge || !edge[0] || !edge[1]) return { x:0, y:0 };
      /* Tâm nét nằm đúng trên cạnh dụng cụ: khoảng cách hình học bằng 0 CSS px.
         Canvas dụng cụ vẫn nằm phía trên canvas mực, nên phần nét bên trong thân
         thước được che còn nửa nét phía ngoài luôn lộ ra để nhìn thấy rõ. */
      return { x:0, y:0 };
    }
    function pivotEdgeInkGuide(shape, pivot, direction, pointer, distancePx = 0) {
      if (!shape || !pivot || !direction) return null;
      const directionLength = Math.hypot(direction.x, direction.y);
      if (directionLength < 1e-7) return null;
      const unit = { x:direction.x / directionLength, y:direction.y / directionLength };
      let best = null;
      instrumentSnapEdges(shape).forEach((edge, edgeIndex) => {
        if (!edge || !edge[0] || !edge[1]) return;
        const dx = edge[1].x - edge[0].x;
        const dy = edge[1].y - edge[0].y;
        const length = Math.hypot(dx, dy);
        if (length < 1e-7) return;
        const parallel = Math.abs((dx / length) * unit.x + (dy / length) * unit.y);
        if (parallel < .985) return;
        const pivotProjection = projectPointToSegment(pivot, edge[0], edge[1]);
        if (pivotProjection.distance > 2.5) return;
        const score = pivotProjection.distance * 1000 - length;
        if (!best || score < best.score) best = { edge, edgeIndex, score };
      });
      if (!best) return null;
      return {
        edgeIndex:best.edgeIndex,
        offsetPx:edgeInkOffset(shape, best.edgeIndex, best.edge, pointer, distancePx),
        outsideNormal:edgeOutsideNormal(shape, best.edgeIndex, best.edge, pointer)
      };
    }
    function projectPointToInfiniteLine(point, origin, direction) {
      const length = Math.hypot(direction.x, direction.y);
      if (length < 1e-7) return { x:point.x, y:point.y };
      const ux = direction.x / length;
      const uy = direction.y / length;
      const t = (point.x - origin.x) * ux + (point.y - origin.y) * uy;
      return { x:origin.x + ux * t, y:origin.y + uy * t };
    }
    function protractorGuideAt(point) {
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || shape.type !== 'protractor') continue;
        const center = px(shape.a);
        const edge = px(shape.b);
        if (!pointInProtractor(point, center, edge)) continue;
        return {
          kind:'protractorRadial',
          shapeIndex:index,
          center:normFromSurfacePoint(center),
          anchor:normFromSurfacePoint(point),
          mode:'pending'
        };
      }
      return null;
    }
    function snapInkPoint(normalizedPoint, guide) {
      resize();
      const point = px(normalizedPoint);
      const threshold = 18;
      if (guide && guide.kind === 'rotationPivot') {
        const shape = state.shapes[guide.shapeIndex];
        if (!shape) return { point:normalizedPoint, guide:null };
        const center = rotationCenterForShape(shape);
        if (!center) return { point:normalizedPoint, guide:null };
        const anchor = center;
        const motion = { x:point.x - anchor.x, y:point.y - anchor.y };
        const motionLength = Math.hypot(motion.x, motion.y);
        if (guide.mode === 'pending' && motionLength >= 6) {
          if (guide.toolType === 'compass') {
            guide.mode = 'free';
          } else if (guide.toolType === 'protractor') {
            guide.direction = { x:motion.x, y:motion.y };
            guide.mode = 'line';
          } else {
            const a = px(shape.a);
            const b = px(shape.b);
            const axis = { x:b.x - a.x, y:b.y - a.y };
            const axisLength = Math.max(1e-7, Math.hypot(axis.x, axis.y));
            const along = { x:axis.x / axisLength, y:axis.y / axisLength };
            const perpendicular = { x:-along.y, y:along.x };
            if (guide.toolType === 'setSquare') {
              /* Tâm êke là góc chung của cạnh ngang và cạnh dọc. Chọn đúng cạnh
                 theo hướng rê bút để vẽ được cả hai phương; không thiên vị cạnh
                 ngang. Dấu của vectơ không ảnh hưởng vì đây là đường thẳng. */
              const alongAmount = Math.abs(motion.x * along.x + motion.y * along.y);
              const perpendicularAmount = Math.abs(motion.x * perpendicular.x + motion.y * perpendicular.y);
              guide.direction = perpendicularAmount > alongAmount ? perpendicular : along;
            } else {
              /* Tâm thước thẳng vẫn chỉ bám theo cạnh dài của thước, không tự
                 chuyển sang hướng vuông góc như yêu cầu ở lần chỉnh trước. */
              guide.direction = along;
            }
            guide.mode = 'line';
            const pivotEdge = pivotEdgeInkGuide(shape, center, guide.direction, point, 0);
            if (pivotEdge) {
              guide.edgeIndex = pivotEdge.edgeIndex;
              guide.offsetPx = pivotEdge.offsetPx;
              guide.outsideNormal = pivotEdge.outsideNormal;
              const shiftedStart = {
                x:center.x + pivotEdge.offsetPx.x,
                y:center.y + pivotEdge.offsetPx.y
              };
              guide.anchor = normFromSurfacePoint(shiftedStart);
              /* Điểm chạm ban đầu được ghi trước khi biết người dùng chọn cạnh
                 nào. Lớp bút sửa lại các điểm chờ đúng vào cạnh và tâm quay,
                 không tạo khoảng lệch CSS nào. */
              guide.rebaseStrokeStart = guide.anchor;
            }
          }
        }
        if (guide.mode === 'pending') return { point:guide.anchor, guide };
        if (guide.mode === 'free') return { point:normalizedPoint, guide };
        const offset = guide.offsetPx && Number.isFinite(guide.offsetPx.x) && Number.isFinite(guide.offsetPx.y)
          ? guide.offsetPx
          : { x:0, y:0 };
        const visibleAnchor = { x:anchor.x + offset.x, y:anchor.y + offset.y };
        const projected = projectPointToInfiniteLine(point, visibleAnchor, guide.direction || motion);
        const snappedPoint = normFromSurfacePoint(projected);
        if (INSTRUMENT_TYPES.has(String(shape.type || '')) && Number.isInteger(guide.edgeIndex)) {
          extendEdgeShadow(shape, guide, snappedPoint);
        }
        return { point:snappedPoint, guide };
      }
      if (guide && guide.kind === 'edge') {
        const shape = state.shapes[guide.shapeIndex];
        const edges = instrumentSnapEdges(shape);
        const edge = edges[guide.edgeIndex];
        if (!edge) return { point:normalizedPoint, guide:null };
        const anchor = px(guide.anchor);
        const offset = guide.offsetPx && Number.isFinite(guide.offsetPx.x) && Number.isFinite(guide.offsetPx.y)
          ? guide.offsetPx
          : { x:0, y:0 };
        const direction = { x:edge[1].x - edge[0].x, y:edge[1].y - edge[0].y };
        const length = Math.hypot(direction.x, direction.y);
        if (length < 1e-7) return { point:normalizedPoint, guide:null };
        const unit = { x:direction.x / length, y:direction.y / length };
        const perpendicular = { x:-unit.y, y:unit.x };
        const motion = { x:point.x - anchor.x, y:point.y - anchor.y };
        const motionLength = Math.hypot(motion.x, motion.y);
        if (guide.mode === 'pending' && motionLength >= 7) {
          const along = Math.abs(motion.x * unit.x + motion.y * unit.y);
          const across = Math.abs(motion.x * perpendicular.x + motion.y * perpendicular.y);
          guide.mode = along >= across ? 'along' : 'perpendicular';
        }
        if (guide.mode === 'pending') return { point:guide.anchor, guide };
        if (guide.mode === 'perpendicular') {
          const projected = projectPointToInfiniteLine(point, anchor, perpendicular);
          return { point:normFromSurfacePoint(projected), guide };
        }
        const projected = projectPointToSegment(point, edge[0], edge[1]);
        const visiblePoint = { x:projected.point.x + offset.x, y:projected.point.y + offset.y };
        const snappedPoint = normFromSurfacePoint(visiblePoint);
        extendEdgeShadow(shape, guide, snappedPoint);
        return { point:snappedPoint, guide };
      }
      if (guide && guide.kind === 'protractorRadial') {
        const shape = state.shapes[guide.shapeIndex];
        if (!shape || shape.type !== 'protractor') return { point:normalizedPoint, guide:null };
        const center = px(shape.a);
        const anchor = px(guide.anchor);
        let radial = { x:anchor.x - center.x, y:anchor.y - center.y };
        const motion = { x:point.x - anchor.x, y:point.y - anchor.y };
        const motionLength = Math.hypot(motion.x, motion.y);
        let radialLength = Math.hypot(radial.x, radial.y);
        if (radialLength < 6 && motionLength >= 6) {
          radial = { x:motion.x, y:motion.y };
          radialLength = motionLength;
        }
        if (guide.mode === 'pending' && motionLength >= 7 && radialLength >= 6) {
          const cosine = Math.abs((motion.x * radial.x + motion.y * radial.y) / (motionLength * radialLength));
          guide.mode = cosine >= Math.cos(Math.PI / 7) ? 'radial' : 'free';
        }
        if (guide.mode === 'pending') return { point:guide.anchor, guide };
        if (guide.mode === 'free') return { point:normalizedPoint, guide };
        const projected = projectPointToInfiniteLine(point, center, radial);
        return { point:normFromSurfacePoint(projected), guide };
      }

      const pivotGuide = rotationPivotGuideAt(point);
      if (pivotGuide) return { point:pivotGuide.anchor, guide:pivotGuide };

      let best = null;
      state.shapes.forEach((shape, shapeIndex) => {
        if (!shape || !INSTRUMENT_TYPES.has(String(shape.type || ''))) return;
        instrumentSnapEdges(shape).forEach((edge, edgeIndex) => {
          const projection = projectPointToSegment(point, edge[0], edge[1]);
          if (projection.distance > threshold) return;
          if (!best || projection.distance < best.distance) {
            best = {
              shapeIndex,
              edgeIndex,
              distance:projection.distance,
              point:projection.point,
              offsetPx:edgeInkOffset(shape, edgeIndex, edge, point, 0),
              outsideNormal:edgeOutsideNormal(shape, edgeIndex, edge, point)
            };
          }
        });
      });
      if (best) {
        const visiblePoint = {
          x:best.point.x + best.offsetPx.x,
          y:best.point.y + best.offsetPx.y
        };
        const anchor = normFromSurfacePoint(visiblePoint);
        return {
          point:anchor,
          guide:{
            kind:'edge',
            shapeIndex:best.shapeIndex,
            edgeIndex:best.edgeIndex,
            anchor,
            offsetPx:best.offsetPx,
            outsideNormal:best.outsideNormal,
            mode:'pending'
          }
        };
      }
      const protractorGuide = protractorGuideAt(point);
      if (protractorGuide) return { point:protractorGuide.anchor, guide:protractorGuide };
      return { point:normalizedPoint, guide:null };
    }

    surface.addEventListener('pointerdown', (event) => {
      if (state.interaction || state.dragging || !state.shapes.length || (event.pointerType === 'mouse' && event.button !== 0)) return;
      resize();
      const normalizedPoint = norm(event);
      const point = px(normalizedPoint);

      /* Khi Bút viết thường đặt đúng tâm thước đo độ, tạm thời chuyển thao tác
         hiện tại thành Đoạn thẳng. Sau khi thả chuột, công cụ gốc vẫn là Bút viết. */
      let nativeTool = '';
      try { nativeTool = String(api.tool() || ''); } catch (_) {}
      const nativePenProtractorPivot = !state.tool && nativeTool === 'pen'
        ? protractorPivotAt(normalizedPoint, 18)
        : null;
      if (nativePenProtractorPivot) {
        event.preventDefault();
        event.stopImmediatePropagation();
        state.pointerId = event.pointerId;
        state.dragCaptureTarget = surface;
        beginAutoSegment(nativePenProtractorPivot.point, color());
        try { api.tool('cursor'); } catch (_) {}
        try { surface.setPointerCapture(event.pointerId); } catch (_) {}
        return;
      }

      /* Ưu tiên tuyệt đối vòng tròn tâm khi đang vẽ Đoạn thẳng, Tia hoặc
         Đường thẳng. Bắt ở pha capture để không bị thân dụng cụ hay canvas
         tương tác khác chặn mất điểm đầu. */
      const pivotDirectDraw = ['segment', 'ray', 'line'].includes(state.tool)
        ? rotationPivotGuideAt(point, 18)
        : null;
      if (pivotDirectDraw) {
        event.preventDefault();
        event.stopImmediatePropagation();
        state.dragging = true;
        state.pointerId = event.pointerId;
        state.start = { ...pivotDirectDraw.anchor };
        state.end = { ...pivotDirectDraw.anchor };
        state.dragCaptureTarget = surface;
        try { surface.setPointerCapture(event.pointerId); } catch (_) {}
        redraw();
        return;
      }

      const control = universalControlAt(point);
      if (!control) return;
      const shape = state.shapes[control.index];
      if (!shape) return;
      event.preventDefault();
      event.stopImmediatePropagation();

      if (control.action === 'close') {
        removeShapeWithOptionalTrace(control.index);
        return;
      }
      if (control.action === 'toggleSide' && control.type === 'ruler') {
        clearEdgeShadowsForShape(shape);
        shape.scaleSide = shape.scaleSide === 'bottom' ? 'top' : 'bottom';
        redraw();
        return;
      }

      const kind = universalInteractionKind(control.type, control.action);
      if (!kind) return;
      if (beginInteraction(kind, control.index, point, event, surface)) {
        state.interaction.universalControl = true;
        redraw();
      }
    }, true);
    surface.addEventListener('pointermove', (event) => {
      if (state.autoSegment && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.preventDefault();
        event.stopImmediatePropagation();
        updateAutoSegment(norm(event));
        return;
      }
      if (state.dragging && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.preventDefault();
        event.stopImmediatePropagation();
        state.end = norm(event);
        redraw();
        return;
      }
      if (!(state.interaction && state.interaction.universalControl)) return;
      event.stopImmediatePropagation();
      updateInteraction(event);
    }, true);
    surface.addEventListener('pointerup', (event) => {
      if (state.autoSegment && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.preventDefault();
        event.stopImmediatePropagation();
        try { surface.releasePointerCapture(event.pointerId); } catch (_) {}
        updateAutoSegment(norm(event));
        finishAutoSegment(true);
        state.pointerId = null;
        state.dragCaptureTarget = null;
        try { api.tool('pen'); } catch (_) {}
        return;
      }
      if (state.dragging && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.stopImmediatePropagation();
        finishCreate(event);
        return;
      }
      if (!(state.interaction && state.interaction.universalControl)) return;
      event.stopImmediatePropagation();
      finishInteraction(event);
    }, true);
    surface.addEventListener('pointercancel', (event) => {
      if (state.autoSegment && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.stopImmediatePropagation();
        finishAutoSegment(false);
        state.pointerId = null;
        state.dragCaptureTarget = null;
        try { api.tool('pen'); } catch (_) {}
        return;
      }
      if (state.dragging && state.dragCaptureTarget === surface && event.pointerId === state.pointerId) {
        event.stopImmediatePropagation();
        finishCreate(event);
        return;
      }
      if (!(state.interaction && state.interaction.universalControl)) return;
      event.stopImmediatePropagation();
      finishInteraction(event);
    }, true);
    surface.addEventListener('lostpointercapture', () => {
      if (state.autoSegment && state.dragCaptureTarget === surface) {
        finishAutoSegment(true);
        state.pointerId = null;
        state.dragCaptureTarget = null;
        try { api.tool('pen'); } catch (_) {}
        return;
      }
      if (state.dragging && state.dragCaptureTarget === surface) {
        finishCreate();
        return;
      }
      if (state.interaction && state.interaction.universalControl) finishInteraction();
    });

    canvas.addEventListener('pointerdown', (event) => {
      if (!state.tool || (event.pointerType === 'mouse' && event.button !== 0)) return;
      event.preventDefault();
      event.stopPropagation();
      resize();
      const point = px(norm(event));
      /*
       * Khi đang chọn Đoạn thẳng/Tia/Đường thẳng, vòng tròn đánh dấu tâm
       * là một điểm bắt đầu hình học chứ không phải vùng chọn lại dụng cụ.
       * Vì vậy phải ưu tiên khóa điểm đầu đúng vào tâm trước khi kiểm tra
       * thân compa, eke, thước thẳng hoặc thước đo độ bên dưới.
       */
      const centerStartGuide = ['segment', 'ray', 'line'].includes(state.tool)
        ? rotationPivotGuideAt(point, 18)
        : null;
      const clickedToolIndex = centerStartGuide ? -1 : findTopInteractiveToolIndex(point);
      if (clickedToolIndex >= 0) {
        const clickedTool = state.shapes[clickedToolIndex];
        if (clickedTool && clickedTool.type && clickedTool.type !== state.tool) {
          state.tool = clickedTool.type;
          sync();
          redraw();
        }
      }
      if (state.tool === 'compass') {
        const closeIndex = findNearestCloseHandleIndex('compass', point, 26);
        if (closeIndex >= 0) { event.stopImmediatePropagation(); removeShapeWithOptionalTrace(closeIndex); return; }
        const rotateIndex = findNearestRotateHandleIndex('compass', point, 36);
        if (rotateIndex >= 0) {
          event.stopImmediatePropagation();
          if (beginInteraction('rotateCompass', rotateIndex, point, event)) { redraw(); return; }
        }
        const index = findTopShapeIndexOfType('compass', point);
        if (index >= 0) {
          const action = getCompassAction(state.shapes[index], point);
          const kind = action === 'move' ? 'moveCompass' : (action === 'resize' ? 'resizeCompass' : 'rotateCompass');
          if (action && beginInteraction(kind, index, point, event)) { redraw(); return; }
          /* Đã bấm vào compa nhưng không trúng nút điều khiển: không di chuyển, không tạo compa mới. */
          return;
        }
      } else if (state.tool === 'protractor') {
        const closeIndex = findNearestCloseHandleIndex('protractor', point, 24);
        if (closeIndex >= 0) { event.stopImmediatePropagation(); removeShapeWithOptionalTrace(closeIndex); return; }
        const rotateIndex = findNearestRotateHandleIndex('protractor', point, 32);
        if (rotateIndex >= 0) {
          event.stopImmediatePropagation();
          if (beginInteraction('rotateProtractor', rotateIndex, point, event)) { redraw(); return; }
        }
        const index = findTopShapeIndexOfType('protractor', point);
        if (index >= 0) {
          const action = getProtractorAction(state.shapes[index], point);
          const kind = action === 'move' ? 'moveProtractor' : (action === 'resize' ? 'resizeProtractor' : 'rotateProtractor');
          if (action && beginInteraction(kind, index, point, event)) { redraw(); return; }
        }
        // Chọn Thước đo độ trong hộp là hiện ngay; không kéo nền để tạo thêm bản thứ hai.
        return;
      } else if (INSTRUMENT_TYPES.has(state.tool)) {
        const index = clickedToolIndex >= 0 && state.shapes[clickedToolIndex] && state.shapes[clickedToolIndex].type === state.tool
          ? clickedToolIndex
          : ensureInstrument(state.tool, false);
        const shape = state.shapes[index];
        const action = getInstrumentAction(shape, point);
        if (action === 'close') {
          event.stopImmediatePropagation();
          removeShapeWithOptionalTrace(index);
          return;
        }
        if (action === 'toggleSide' && shape && shape.type === 'ruler') {
          shape.scaleSide = shape.scaleSide === 'bottom' ? 'top' : 'bottom';
          redraw();
          return;
        }
        const kind = action === 'move' ? 'moveInstrument' : (action === 'rotate' ? 'rotateInstrument' : (action === 'resize' ? 'resizeInstrument' : ''));
        if (kind && beginInteraction(kind, index, point, event)) { redraw(); return; }
        return;
      }
      state.dragging = true;
      state.pointerId = event.pointerId;
      state.start = centerStartGuide ? { ...centerStartGuide.anchor } : norm(event);
      state.end = { ...state.start };
      state.dragCaptureTarget = canvas;
      try { canvas.setPointerCapture(event.pointerId); } catch (_) {}
      redraw();
    });
    canvas.addEventListener('pointermove', (event) => {
      if (state.interaction && updateInteraction(event)) return;
      if (!state.dragging || event.pointerId !== state.pointerId) return;
      event.preventDefault();
      event.stopPropagation();
      state.end = norm(event);
      redraw();
    });
    canvas.addEventListener('pointerup', (event) => {
      if (finishInteraction(event)) return;
      finishCreate(event);
    });
    canvas.addEventListener('pointercancel', (event) => {
      if (finishInteraction(event)) return;
      finishCreate(event);
    });
    canvas.addEventListener('lostpointercapture', () => {
      if (state.interaction) finishInteraction();
      if (state.dragging) finishCreate();
    });

    function eraseAt(event) {
      if (!state.shapes.length) return;
      const point = pointOnSurface(event);
      const size = Math.max(12, Number(typeof api.eraserSize === 'function' ? api.eraserSize() : 38) || 38);
      const kept = [];
      let removed = false;
      state.shapes.forEach((shape) => {
        const type = String(shape && shape.type || '');
        const canErase = ERASABLE_SHAPE_TYPES.has(type);
        if (canErase && hit(shape, point, size * .58)) {
          removed = true;
          if (UNDOABLE_SHAPE_TYPES.has(type)) state.eraseUndoChanged = true;
          return;
        }
        kept.push(shape);
      });
      if (removed) {
        state.shapes = kept;
        state.eraseChanged = true;
        redraw();
      }
    }
    surface.addEventListener('pointerdown', (event) => {
      if (state.tool || String(api.tool() || '') !== 'eraser' || !state.shapes.length || (event.pointerType === 'mouse' && event.button !== 0)) return;
      state.erasing = true;
      state.eraseChanged = false;
      state.eraseUndoChanged = false;
      state.pointerId = event.pointerId;
      snapshot();
      eraseAt(event);
    }, true);
    surface.addEventListener('pointermove', (event) => {
      if (state.erasing && event.pointerId === state.pointerId) eraseAt(event);
    }, true);
    const finishErase = (event) => {
      if (!state.erasing || (event && event.pointerId !== state.pointerId)) return;
      state.erasing = false;
      state.pointerId = null;
      if (!state.eraseUndoChanged && state.undo.length) state.undo.pop();
      state.eraseChanged = false;
      state.eraseUndoChanged = false;
    };
    surface.addEventListener('pointerup', finishErase, true);
    surface.addEventListener('pointercancel', finishErase, true);

    TOOLS.forEach((entry) => {
      const choice = document.createElement('button');
      choice.type = 'button';
      choice.className = 'cv7991-geometry-choice';
      choice.setAttribute('role', 'menuitemradio');
      choice.setAttribute('data-geometry-tool', entry.id);
      choice.setAttribute('aria-label', entry.label);
      choice.title = entry.label;
      if (entry.solid) choice.classList.add('is-solid-choice');
      if (entry.instrument) choice.classList.add('is-instrument-choice');
      choice.innerHTML = entry.solid ? ICONS[entry.id] : `${ICONS[entry.id]}<span>${entry.label}</span>`;
      choice.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopPropagation();
        changeTool(entry.id);
        button.focus({ preventScroll:true });
      });
      grid.appendChild(choice);
    });
    button.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      menu.hidden ? openMenu() : closeMenu();
    });
    dock.addEventListener('click', (event) => {
      const selector = String(options.nativeToolSelector || '[data-side-ink-tool]');
      const target = event.target instanceof Element ? event.target.closest(selector) : null;
      if (target) {
        if (state.tool) changeTool('');
        closeMenu();
      }
    }, true);
    document.addEventListener('pointerdown', (event) => {
      if (!menu.hidden && event.target instanceof Node && !dock.contains(event.target)) closeMenu();
    }, true);
    document.addEventListener('keydown', (event) => {
      if (event.key === 'Escape' && !menu.hidden) {
        closeMenu();
        button.focus({ preventScroll:true });
      }
    });
    if (undoButton instanceof HTMLElement) {
      undoButton.addEventListener('click', (event) => {
        event.preventDefault();
        event.stopImmediatePropagation();
        window.mvipDrawingHistory.undo(surface);
        undoButton.focus({ preventScroll:true });
      }, true);
    }

    function checkQuestion() {
      const next = signature();
      if (!state.signature) { state.signature = next; return; }
      if (next !== state.signature) {
        state.signature = next;
        clear(false);
      }
    }
    if (progress instanceof HTMLElement && typeof MutationObserver === 'function') {
      const observer = new MutationObserver(() => requestAnimationFrame(checkQuestion));
      observer.observe(progress, { childList:true, characterData:true, subtree:true });
    }
    if (typeof MutationObserver === 'function') {
      const observer = new MutationObserver(() => {
        if (presenter.hidden) {
          closeMenu();
          if (preserveWhenHidden) {
            /* Bảng trắng chỉ đang đóng tạm: giữ nguyên hình và lịch sử hoàn tác,
               chỉ hủy thao tác dở dang để lần mở sau tiếp tục đúng nội dung cũ. */
            state.dragging = false;
            state.erasing = false;
            state.pointerId = null;
            state.start = null;
            state.end = null;
            state.interaction = null;
            state.previewArc = null;
            state.autoSegment = null;
            state.dragCaptureTarget = null;
            state.tool = '';
            redraw();
            sync();
          } else {
            clear(true);
          }
          state.signature = signature();
        } else {
          scheduleResize();
          checkQuestion();
        }
      });
      observer.observe(presenter, { attributes:true, attributeFilter:['hidden', 'class'] });
      const surfaceObserver = new MutationObserver(() => {
        if (state.attachFrame) return;
        state.attachFrame = requestAnimationFrame(() => {
          state.attachFrame = 0;
          ensureAttached();
          scheduleResize();
        });
      });
      surfaceObserver.observe(surface, { childList:true });
    }
    if (typeof ResizeObserver === 'function') {
      const observer = new ResizeObserver(scheduleResize);
      observer.observe(surface);
    }
    surface.addEventListener('scroll', resize, { passive:true });
    window.addEventListener('resize', scheduleResize);
    document.addEventListener('fullscreenchange', () => [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay)));
    document.addEventListener('webkitfullscreenchange', () => [0, 100, 260, 600].forEach((delay) => setTimeout(scheduleResize, delay)));

    function setAutoSegmentUi(active) {
      button.classList.toggle('is-auto-segment', !!active);
      if (active) {
        button.setAttribute('aria-pressed', 'true');
        button.setAttribute('aria-label', 'Đang vẽ đoạn thẳng từ tâm thước đo độ');
        button.title = 'Đang vẽ đoạn thẳng từ tâm thước đo độ';
        button.innerHTML = options.showButtonLabel
          ? `${ICONS.segment}<span>Đoạn thẳng</span>`
          : ICONS.segment;
      } else {
        sync();
      }
    }
    function protractorPivotAt(normalizedPoint, tolerance = 15) {
      resize();
      const point = px(normalizedPoint);
      const hitRadius = Math.max(8, Number(tolerance) || 15);
      let best = null;
      for (let index = state.shapes.length - 1; index >= 0; index -= 1) {
        const shape = state.shapes[index];
        if (!shape || shape.type !== 'protractor') continue;
        const center = px(shape.a);
        const distance = dist(point, center);
        if (distance > hitRadius) continue;
        if (!best || distance < best.distance) best = { index, center, distance };
      }
      if (!best) return null;
      return { shapeIndex:best.index, point:normFromSurfacePoint(best.center) };
    }
    function beginAutoSegment(anchor, strokeColor) {
      if (!anchor) return false;
      state.autoSegment = {
        a:{ x:Number(anchor.x) || 0, y:Number(anchor.y) || 0 },
        b:{ x:Number(anchor.x) || 0, y:Number(anchor.y) || 0 },
        color:String(strokeColor || color())
      };
      setAutoSegmentUi(true);
      redraw();
      return true;
    }
    function updateAutoSegment(point) {
      if (!state.autoSegment || !point) return false;
      state.autoSegment.b = { x:Number(point.x) || 0, y:Number(point.y) || 0 };
      redraw();
      return true;
    }
    function finishAutoSegment(commit = true) {
      const segment = state.autoSegment;
      state.autoSegment = null;
      if (commit && segment && dist(px(segment.a), px(segment.b)) >= 4) {
        snapshot();
        state.shapes.push({
          type:'segment',
          color:String(segment.color || color()),
          a:{ x:Number(segment.a.x) || 0, y:Number(segment.a.y) || 0 },
          b:{ x:Number(segment.b.x) || 0, y:Number(segment.b.y) || 0 },
          segments:[]
        });
      }
      setAutoSegmentUi(false);
      redraw();
      return !!segment;
    }

    state.signature = signature();
    resize();
    sync();
    const instance = {
      presenter,
      state,
      undo,
      clear,
      tool:(value) => value == null ? state.tool : changeTool(value),
      hasUndo:() => state.undo.length > 0,
      visible:() => !presenter.hidden && getComputedStyle(presenter).display !== 'none',
      snapInkPoint,
      protractorPivotAt,
      beginAutoSegment,
      updateAutoSegment,
      finishAutoSegment,
      cancelAutoSegment:() => finishAutoSegment(false)
    };
    window.mvipDrawingHistory.register(surface, 'geometry', {
      peek:() => Number(state.undo[state.undo.length - 1]?.mvipUndoOrder) || 0,
      undo,
      finish:() => {
        if (state.interaction) finishInteraction();
        if (state.dragging) finishCreate();
        if (state.autoSegment) finishAutoSegment(true);
        if (state.erasing) finishErase();
      },
      afterUndo:(order) => {
        const kept = state.edgeShadows.filter(shadow => shadow.mvipUndoOrder !== order);
        if (kept.length !== state.edgeShadows.length) { state.edgeShadows = kept; redraw(); }
      }
    });
    instance.surface = surface;
    instance.undo = () => window.mvipDrawingHistory.undo(surface);
    window[options.geometryApiName] = instance;
    return instance;
  }

  function init() {
    if (!instances.some((item) => item.presenter.id === 'wordPresentationPresenter')) {
      const item = createInstance({
        presenterId:'wordPresentationPresenter',
        surfaceId:'wordPresentationViewport',
        dockId:'wordPresentationSideInkDock',
        apiName:'mvipWordInkTool',
        progressId:'wordPresentationProgress',
        canvasId:'wordPresentationGeometryCanvas',
        buttonId:'wordPresentationGeometryToolBtn',
        menuId:'wordPresentationGeometryMenu',
        geometryApiName:'mvipWordGeometryTool'
      });
      if (item) instances.push(item);
    }
    if (!instances.some((item) => item.presenter.id === 'singleExamPresenter')) {
      const item = createInstance({
        presenterId:'singleExamPresenter',
        surfaceId:'singleExamSlide',
        dockId:'singleExamSideInkDock',
        apiName:'mvipSingleExamInkTool',
        progressId:'singleExamProgressText',
        canvasId:'singleExamGeometryCanvas',
        buttonId:'singleExamGeometryToolBtn',
        menuId:'singleExamGeometryMenu',
        geometryApiName:'mvipSingleExamGeometryTool'
      });
      if (item) instances.push(item);
    }
    if (!instances.some((item) => item.presenter.id === 'wordPresentationImageZoomModal')) {
      const item = createInstance({
        presenterId:'wordPresentationImageZoomModal',
        surfaceId:'wordPresentationImageZoomContent',
        dockId:'wordImageZoomInkTools',
        apiName:'mvipImageZoomInkTool',
        progressId:'',
        canvasId:'wordImageZoomGeometryCanvas',
        buttonId:'wordImageZoomGeometryToolBtn',
        menuId:'wordImageZoomGeometryMenu',
        geometryApiName:'mvipImageZoomGeometryTool',
        buttonClass:'word-image-zoom-ink-tool-btn cv7991-side-geometry-tool cv7991-image-zoom-geometry-tool',
        menuClass:'cv7991-image-zoom-geometry-menu',
        undoSelector:'.word-image-zoom-ink-undo-btn',
        fallbackSelector:'.word-image-zoom-ink-popover',
        nativeToolSelector:'[data-zoom-ink-tool]',
        menuPlacement:'below',
        showButtonLabel:true
      });
      if (item) instances.push(item);
    }
    if (!instances.some((item) => item.presenter.id === 'mvipWhiteboardPanel')) {
      const item = createInstance({
        presenterId:'mvipWhiteboardPanel',
        surfaceId:'mvipWhiteboardSurface',
        visibleViewportId:'mvipWhiteboardViewport',
        dockId:'mvipWhiteboardToolDock',
        apiName:'mvipWhiteboardInkTool',
        progressId:'mvipWhiteboardProgress',
        canvasId:'mvipWhiteboardGeometryCanvas',
        buttonId:'mvipWhiteboardGeometryToolBtn',
        menuId:'mvipWhiteboardGeometryMenu',
        geometryApiName:'mvipWhiteboardGeometryTool',
        preserveWhenHidden:true,
        buttonClass:'mvip-whiteboard-tool-btn cv7991-side-geometry-tool',
        menuClass:'mvip-whiteboard-geometry-menu',
        undoSelector:'#mvipWhiteboardUndoBtn',
        fallbackSelector:'#mvipWhiteboardClearBtn',
        nativeToolSelector:'[data-whiteboard-native-tool]',
        menuPlacement:'below',
        showButtonLabel:false
      });
      if (item) instances.push(item);
    }
    return instances.length >= 4;
  }

  window.addEventListener('keydown', (event) => {
    const target = event.target instanceof Element ? event.target : null;
    const editable = !!(target && target.closest('input,textarea,select,[contenteditable="true"]'));
    const shortcut = (event.ctrlKey || event.metaKey)
      && !event.altKey
      && !event.shiftKey
      && String(event.key || '').toLowerCase() === 'z';
    if (!shortcut || editable) return;
    const visible = instances.filter(entry => entry.visible());
    const item = visible.find(entry => entry.presenter.id === 'wordPresentationImageZoomModal')
      || visible.find(entry => entry.surface === window.mvipDrawingHistory.lastSurface())
      || visible.find(entry => entry.presenter.id === 'mvipWhiteboardPanel')
      || visible[0];
    if (!item) return;
    // Consume the shortcut even when this surface is empty: never undo another pane.
    event.preventDefault();
    event.stopImmediatePropagation();
    item.undo();
  }, true);

  if (!init()) {
    let tries = 0;
    const timer = setInterval(() => {
      tries += 1;
      if (init() || tries >= 40) clearInterval(timer);
    }, 250);
  }
})();

</script>

<!-- Bản điều chỉnh 2026-08-27: dùng đầy đủ thanh công cụ Word trong PowerPoint;
     các tác vụ cần dữ liệu câu hỏi tự khóa, các tác vụ màn chiếu vẫn hoạt động. -->
<style id="cv7991-powerpoint-shared-presentation-tools-20260827">
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  > .word-presentation-toolbar {
    display:flex !important;
    pointer-events:auto !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  > #wordPresentationQuestionPickerModal[hidden] {
    display:none !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  > #wordPresentationQuestionPickerModal:not([hidden]) {
    display:grid !important;
    pointer-events:auto !important;
    visibility:visible !important;
    z-index:125000 !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationAnswerBtn,
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationAllBtn,
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationResultBtn,
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #lessonPlanCheckMoreBtn {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationChooseQuestionBtn {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationCountdownInput {
    display:block !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-ordinary-document.is-powerpoint-slide-mode
  #wordPresentationScanTools {
    display:flex !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  #wordPresentationSideInkDock {
    display:flex !important;
    pointer-events:auto !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-ink-canvas,
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .cv7991-geometry-canvas {
    display:block !important;
    pointer-events:none !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-ink-canvas {
    z-index:180 !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .cv7991-geometry-canvas {
    z-index:184 !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-ink-canvas.is-active,
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .cv7991-geometry-canvas.is-active {
    pointer-events:auto !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-ink-eraser-cursor {
    display:none !important;
    pointer-events:none !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-ink-eraser-cursor.is-visible {
    display:block !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-region-overlay {
    display:block !important;
    pointer-events:auto !important;
    z-index:190 !important;
  }
  #wordPresentationPresenter.word-presentation-presenter.is-powerpoint-slide-mode
  .word-presentation-region-zoom-pane {
    display:block !important;
    pointer-events:none !important;
    z-index:170 !important;
  }
  #wordPresentationPresenter.is-powerpoint-slide-mode
  :is(button, select).is-pptx-tool-unavailable,
  #wordPresentationPresenter.is-powerpoint-slide-mode
  :is(button, select).is-pptx-media-locked {
    opacity:.36 !important;
    filter:grayscale(.75) !important;
    cursor:not-allowed !important;
    box-shadow:none !important;
  }
  #wordPresentationPresenter.is-powerpoint-slide-mode
  #wordPresentationScanStatus.is-pptx-tool-note {
    color:#64748b !important;
    font-style:italic;
  }
  #wordPresentationPresenter.is-powerpoint-slide-mode
  #wordPresentationHttcBadge {
    display:none !important;
  }
</style>
<script id="cv7991-powerpoint-shared-presentation-tools-script-20260827">
(() => {
  'use strict';

  const presenter = document.getElementById('wordPresentationPresenter');
  if (!(presenter instanceof HTMLElement)) return;

  const saved = new Map();
  const mediaSaved = new Map();
  let frame = 0;
  let syncing = false;

  const mediaConflictSelector = [
    '#wordPresentationRegionBtn',
    '#wordPresentationWhiteboardBtn',
    '#wordPresentationWhiteboardSplitBtn',
    '#wordPresentationSplitCaptureBtn',
    '#wordPresentationInkModeBtn',
    '#wordPresentationInkColorBtn',
    '#wordPresentationSideInkDock button'
  ].join(',');

  function isPowerPoint() {
    return !presenter.hidden && presenter.classList.contains('is-powerpoint-slide-mode');
  }

  function remember(element) {
    if (!(element instanceof HTMLElement) || saved.has(element)) return;
    saved.set(element, {
      hidden:element.hidden,
      disabled:'disabled' in element ? !!element.disabled : null,
      title:element.getAttribute('title'),
      ariaDisabled:element.getAttribute('aria-disabled'),
      ariaLabel:element.getAttribute('aria-label'),
      text:element.id === 'wordPresentationScanStatus' ? element.textContent : null
    });
  }

  function showElement(element) {
    if (!(element instanceof HTMLElement)) return;
    remember(element);
    if (element.hidden) element.hidden = false;
    element.removeAttribute('aria-hidden');
  }

  function hideElement(element) {
    if (!(element instanceof HTMLElement)) return;
    remember(element);
    if (!element.hidden) element.hidden = true;
    element.setAttribute('aria-hidden', 'true');
    if ('disabled' in element && !element.disabled) element.disabled = true;
  }

  function restoreSaved() {
    mediaSaved.forEach((state, element) => {
      if (!(element instanceof HTMLElement)) return;
      if ('disabled' in element) element.disabled = state.disabled;
      if (state.title == null) element.removeAttribute('title');
      else element.title = state.title;
      if (element.classList.contains('is-pptx-media-locked')) element.classList.remove('is-pptx-media-locked');
    });
    mediaSaved.clear();
    saved.forEach((state, element) => {
      if (!(element instanceof HTMLElement)) return;
      if (element.hidden !== state.hidden) element.hidden = state.hidden;
      if (state.disabled !== null && 'disabled' in element) element.disabled = state.disabled;
      if (state.title == null) element.removeAttribute('title');
      else element.title = state.title;
      if (state.ariaDisabled == null) element.removeAttribute('aria-disabled');
      else element.setAttribute('aria-disabled', state.ariaDisabled);
      if (state.ariaLabel == null) element.removeAttribute('aria-label');
      else element.setAttribute('aria-label', state.ariaLabel);
      if (state.text !== null && element.textContent !== state.text) element.textContent = state.text;
      ['is-pptx-tool-unavailable', 'is-pptx-tool-note', 'is-pptx-media-locked'].forEach((name) => { if (element.classList.contains(name)) element.classList.remove(name); });
      element.removeAttribute('data-pptx-tier-enabled');
    });
    saved.clear();
    if (presenter.classList.contains('is-pptx-media-playing')) presenter.classList.remove('is-pptx-media-playing');
  }

  function syncMediaConflictTools() {
    const playing = Array.from(presenter.querySelectorAll('video, audio')).some((media) =>
      media instanceof HTMLMediaElement && !media.paused && !media.ended
    );
    const loading = presenter.classList.contains('is-pptx-rendering')
      || !!presenter.querySelector('.word-presentation-card.is-loading');
    const regionActive = !!presenter.querySelector('.word-presentation-region-overlay, .word-presentation-region-zoom-pane');
    const regionSelecting = !!presenter.querySelector('.word-presentation-region-overlay');
    presenter.classList.toggle('is-pptx-media-playing', playing);
    const desired = new Map();
    const addLocks = (selector, reason) => {
      presenter.querySelectorAll(selector).forEach((element) => {
        if (element instanceof HTMLButtonElement && !element.classList.contains('is-pptx-tool-unavailable')) {
          desired.set(element, reason);
        }
      });
    };
    if (playing || loading) {
      addLocks(mediaConflictSelector, playing
        ? 'Tạm khóa khi video trong trang chiếu đang phát.'
        : 'Tạm khóa trong lúc đang dựng trang chiếu.');
    } else if (regionActive) {
      addLocks([
        '#wordPresentationWhiteboardBtn',
        '#wordPresentationWhiteboardSplitBtn',
        '#wordPresentationSplitCaptureBtn'
      ].join(','), 'Tạm khóa trong lúc đang Quét vùng; bấm Quét vùng để kết thúc.');
      // Drawing tools can work above the completed zoom pane. Only block them
      // while the selection overlay is still collecting a region.
      if (regionSelecting) {
        addLocks([
          '#wordPresentationInkModeBtn',
          '#wordPresentationInkColorBtn',
          '#wordPresentationSideInkDock button'
        ].join(','), 'Chọn xong vùng để sử dụng công cụ viết vẽ.');
      }
    }

    mediaSaved.forEach((state, element) => {
      if (!(element instanceof HTMLButtonElement) || desired.has(element)) return;
      if (element.disabled !== state.disabled) element.disabled = state.disabled;
      if (state.title == null) element.removeAttribute('title');
      else element.title = state.title;
      if (element.classList.contains('is-pptx-media-locked')) element.classList.remove('is-pptx-media-locked');
      mediaSaved.delete(element);
    });
    desired.forEach((reason, element) => {
      if (!mediaSaved.has(element)) mediaSaved.set(element, { disabled:element.disabled, title:element.getAttribute('title') });
      if (!element.disabled) element.disabled = true;
      if (!element.classList.contains('is-pptx-media-locked')) element.classList.add('is-pptx-media-locked');
      element.title = reason;
    });
  }

  function sync() {
    frame = 0;
    if (syncing) return;
    syncing = true;
    try {
      if (!isPowerPoint()) {
        restoreSaved();
        return;
      }

      const toolbar = presenter.querySelector('.word-presentation-toolbar');
      if (toolbar instanceof HTMLElement) {
        if (toolbar.hidden) toolbar.hidden = false;
        toolbar.removeAttribute('aria-hidden');
      }

      const scanTools = document.getElementById('wordPresentationScanTools');
      if (scanTools instanceof HTMLElement) showElement(scanTools);

      const classSelect = document.getElementById('wordPresentationClassSelect');
      if (classSelect instanceof HTMLSelectElement) {
        showElement(classSelect);
        if (classSelect.disabled !== (classSelect.options.length <= 1)) classSelect.disabled = classSelect.options.length <= 1;
        classSelect.classList.toggle('is-pptx-tool-unavailable', classSelect.disabled);
        classSelect.setAttribute('aria-disabled', classSelect.disabled ? 'true' : 'false');
        classSelect.title = classSelect.disabled
          ? 'Chưa có Lớp-Môn để nhận thẻ hoặc dùng Vòng quay may mắn.'
          : 'Chọn Lớp-Môn để nhận thẻ và dùng Vòng quay may mắn.';
      }

      const scanStatus = document.getElementById('wordPresentationScanStatus');
      if (scanStatus instanceof HTMLElement) {
        remember(scanStatus);
        let scannedCount = 0;
        try {
          scannedCount = typeof state !== 'undefined'
            ? Object.values(state.currentLiveAnswers || {}).filter((row) =>
              ['A', 'B', 'C', 'D'].includes(String(row && row.ans || '').trim().toUpperCase())
            ).length
            : 0;
        } catch (_) {}
        scanStatus.classList.toggle('is-pptx-tool-note', scannedCount < 1);
        scanStatus.classList.toggle('is-ready', scannedCount > 0);
        const note = scannedCount > 0 ? `${scannedCount} học sinh đã quét` : '';
        if (scanStatus.textContent !== note) scanStatus.textContent = note;
        if (scanStatus.title !== note) scanStatus.title = note;
      }

      [
        'wordPresentationAnswerBtn',
        'wordPresentationAllBtn',
        'wordPresentationResultBtn',
        'lessonPlanCheckMoreBtn'
      ].forEach((id) => {
        const element = document.getElementById(id);
        if (element instanceof HTMLElement && presenter.contains(element)) hideElement(element);
      });

      const chooseSlide = document.getElementById('wordPresentationChooseQuestionBtn');
      if (chooseSlide instanceof HTMLButtonElement) {
        showElement(chooseSlide);
        if (chooseSlide.disabled) chooseSlide.disabled = false;
        if (chooseSlide.classList.contains('is-pptx-tool-unavailable')) chooseSlide.classList.remove('is-pptx-tool-unavailable');
        chooseSlide.removeAttribute('aria-disabled');
        if (chooseSlide.textContent !== 'Chọn Slide') chooseSlide.textContent = 'Chọn Slide';
        chooseSlide.title = 'Mở danh sách số thứ tự và ảnh đại diện các slide';
      }

      const countdown = document.getElementById('wordPresentationCountdownInput');
      if (countdown instanceof HTMLSelectElement) {
        showElement(countdown);
        countdown.title = 'Số giây đếm ngược; tự chạy khi vào toàn màn hình hoặc chuyển trang chiếu. Bấm đồng hồ đang chạy để dừng và chọn lại thời gian.';
        countdown.setAttribute('aria-label', 'Số giây đếm ngược của Trình chiếu PowerPoint');
      }

      syncMediaConflictTools();
    } finally {
      syncing = false;
    }
  }

  function scheduleSync() {
    if (frame) return;
    frame = requestAnimationFrame(sync);
  }

  ['play', 'pause', 'ended', 'emptied'].forEach((type) => {
    presenter.addEventListener(type, scheduleSync, true);
  });

  if (typeof MutationObserver === 'function') {
    const observer = new MutationObserver(scheduleSync);
    observer.observe(presenter, {
      attributes:true,
      attributeFilter:['class', 'hidden', 'disabled'],
      childList:true,
      characterData:true,
      subtree:true
    });
  }
  window.addEventListener('resize', scheduleSync);
  scheduleSync();
})();
</script>

<!-- Lớp khóa cuối cùng nằm sau toàn bộ CSS co giãn. Khi trình duyệt thay đổi
     mức thu phóng, các media query cũ không thể làm nút thừa hiện lại. -->
<style id="mvip-split-final-visibility-guard-20260825">
  body.mvip-whiteboard-split-open
  .word-presentation-presenter.mvip-whiteboard-split
  [data-mvip-split-force-hidden="true"],
  body.mvip-whiteboard-split-open
  .single-exam-presenter.mvip-whiteboard-split
  [data-mvip-split-force-hidden="true"] {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }
</style>

<style id="cv7991-powerpoint-split-left-full-tools-20260829">
  /* PowerPoint dùng chung presenter với Word nhưng dock có thể được dựng sau
     khi chia đôi. Lớp cuối này dùng đúng thứ tự và độ co giãn của Word để
     nhóm điều hướng không bị tách sang mép phải khỏi bộ công cụ viết/vẽ. */
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > .word-presentation-toolbar {
    position:relative !important;
    height:auto !important;
    min-height:48px !important;
    align-items:center !important;
    justify-content:flex-start !important;
    padding:0 !important;
    overflow:visible !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  .word-presentation-actions {
    position:absolute !important;
    left:0 !important;
    right:0 !important;
    top:0 !important;
    bottom:auto !important;
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
    height:48px !important;
    box-sizing:border-box !important;
    display:flex !important;
    flex-direction:row !important;
    flex-wrap:nowrap !important;
    direction:ltr !important;
    align-items:center !important;
    justify-content:flex-start !important;
    align-content:center !important;
    gap:5px !important;
    padding:7px 7px 7px !important;
    margin:0 !important;
    overflow:visible !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  #wordPresentationWhiteboardSplitBtn { order:20 !important; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  #wordPresentationPrevBtn { order:40 !important; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  #wordPresentationNextBtn { order:50 !important; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  #wordPresentationPasteCaptureBtn { order:55 !important; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  .word-presentation-actions > #wordPresentationSideInkDock.mvip-split-horizontal-ink-dock {
    order:60 !important;
    display:flex !important;
    visibility:visible !important;
    pointer-events:auto !important;
    position:relative !important;
    inset:auto !important;
    flex:0 0 auto !important;
    width:auto !important;
    min-width:max-content !important;
    max-width:none !important;
    height:34px !important;
    min-height:34px !important;
    flex-flow:row nowrap !important;
    align-items:center !important;
    justify-content:flex-start !important;
    gap:4px !important;
    padding:0 !important;
    margin:0 !important;
    border:0 !important;
    background:transparent !important;
    box-shadow:none !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  #wordPresentationSideInkDock :is(
    [data-side-ink-tool],
    .cv7991-side-ink-color-config,
    .cv7991-side-geometry-tool,
    .cv7991-side-ink-undo,
    .cv7991-side-ink-clear,
    .mvip-split-left-capture-btn
  ) {
    display:inline-flex !important;
    visibility:visible !important;
    width:32px !important;
    min-width:32px !important;
    height:32px !important;
    min-height:32px !important;
    padding:0 !important;
    flex:0 0 32px !important;
  }
</style>

<style id="cv7991-powerpoint-split-dedicated-strip-20260829">
  #mvipPowerPointSplitLeftToolStrip[hidden] { display:none !important; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > .word-presentation-toolbar .word-presentation-actions {
    visibility:hidden !important;
    pointer-events:none !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > #mvipPowerPointSplitLeftToolStrip {
    position:absolute !important;
    left:0 !important;
    right:auto !important;
    top:0 !important;
    z-index:250000 !important;
    width:var(--mvip-whiteboard-split-left, 50vw) !important;
    max-width:var(--mvip-whiteboard-split-left, 50vw) !important;
    height:48px !important;
    min-height:48px !important;
    box-sizing:border-box !important;
    display:flex !important;
    flex-flow:row nowrap !important;
    align-items:center !important;
    justify-content:flex-start !important;
    gap:5px !important;
    padding:7px !important;
    margin:0 !important;
    overflow:visible !important;
    border:0 !important;
    border-bottom:1px solid #cbd5e1 !important;
    background:#fff !important;
    box-shadow:0 4px 12px rgba(15,23,42,.12) !important;
    visibility:visible !important;
    pointer-events:auto !important;
  }
  #mvipPowerPointSplitLeftToolStrip
  [data-mvip-powerpoint-proxy-for="wordPresentationWhiteboardSplitBtn"] { order:20; }
  #mvipPowerPointSplitLeftToolStrip
  [data-mvip-powerpoint-proxy-for="wordPresentationPrevBtn"] { order:40; }
  #mvipPowerPointSplitLeftToolStrip
  [data-mvip-powerpoint-proxy-for="wordPresentationNextBtn"] { order:50; }
  #mvipPowerPointSplitLeftToolStrip
  [data-mvip-powerpoint-proxy-for="wordPresentationPasteCaptureBtn"] { order:55; }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > #mvipPowerPointSplitLeftToolStrip > #wordPresentationSideInkDock {
    order:60 !important;
    position:relative !important;
    inset:auto !important;
    z-index:1 !important;
    width:auto !important;
    min-width:max-content !important;
    max-width:none !important;
    height:34px !important;
    min-height:34px !important;
    box-sizing:border-box !important;
    display:flex !important;
    flex:0 0 auto !important;
    flex-flow:row nowrap !important;
    align-items:center !important;
    justify-content:flex-start !important;
    gap:4px !important;
    padding:0 !important;
    margin:0 !important;
    border:0 !important;
    border-radius:0 !important;
    background:transparent !important;
    box-shadow:none !important;
    visibility:visible !important;
    pointer-events:auto !important;
  }
  #mvipPowerPointSplitLeftToolStrip > button {
    min-height:32px !important;
    height:32px !important;
    padding:0 8px !important;
    border-radius:9px !important;
    flex:0 0 auto !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > #mvipPowerPointSplitLeftToolStrip > #wordPresentationSideInkDock :is(
    [data-side-ink-tool],
    .cv7991-side-ink-color-config,
    .cv7991-side-geometry-tool,
    .cv7991-side-ink-undo,
    .cv7991-side-ink-clear,
    .mvip-split-left-capture-btn
  ) {
    width:28px !important;
    min-width:28px !important;
    height:28px !important;
    min-height:28px !important;
    padding:0 !important;
    flex:0 0 28px !important;
  }
</style>

<style id="cv7991-powerpoint-whiteboard-fullscreen-restore-20260829">
  /* Khi bảng trắng chiếm toàn màn hình, thanh riêng của PowerPoint không còn
     vùng trình chiếu trái để điều khiển. Ẩn thanh có z-index cao này để nó
     không che nút thu nhỏ của bảng trắng. */
  body.mvip-powerpoint-whiteboard-fullscreen
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > #mvipPowerPointSplitLeftToolStrip {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }
  /* Giữ nút quay về chia đôi luôn nhìn thấy và bấm được trên mọi độ rộng. */
  body.mvip-powerpoint-whiteboard-fullscreen
  #mvipWhiteboardPanel.is-split.is-board-fullscreen #mvipWhiteboardSizeBtn {
    display:inline-flex !important;
    visibility:visible !important;
    opacity:1 !important;
    pointer-events:auto !important;
    position:relative !important;
    z-index:1000 !important;
    order:120 !important;
  }
</style>

<!-- Bản điều chỉnh 2026-08-29: mọi màn hình trình chiếu không chia đôi luôn
     có Chọn lớp - môn, Vòng quay may mắn và thông báo quyền tài khoản. -->
<style id="mvip-unified-presentation-account-controls-20260829">
  /* Ô chọn lớp là điều khiển chung, không còn phụ thuộc nhóm công cụ quét. */
  body:not(.mvip-whiteboard-split-open)
  #wordPresentationPresenter:not([hidden]) > .word-presentation-toolbar
  #wordPresentationClassSelect,
  body:not(.mvip-whiteboard-split-open)
  #singleExamPresenter:not([hidden]) > .single-exam-toolbar
  #singleExamClassSelect {
    display:block !important;
    visibility:visible !important;
    opacity:1;
    pointer-events:auto;
    -webkit-appearance:menulist !important;
    appearance:auto !important;
    flex:0 0 auto;
  }
  body:not(.mvip-whiteboard-split-open)
  #wordPresentationPresenter:not([hidden]) > .word-presentation-toolbar
  #wordPresentationClassSelect:disabled,
  body:not(.mvip-whiteboard-split-open)
  #singleExamPresenter:not([hidden]) > .single-exam-toolbar
  #singleExamClassSelect:disabled {
    opacity:.55;
    cursor:not-allowed;
  }

  /* Các bản cũ từng ẩn thông báo ở PowerPoint và tài liệu thông thường. */
  body:not(.mvip-whiteboard-split-open)
  #wordPresentationPresenter:not([hidden]) > #wordPresentationAccessBanner:not([hidden]),
  body:not(.mvip-whiteboard-split-open)
  #singleExamPresenter:not([hidden]) > #singleExamAccessBanner:not([hidden]) {
    display:flex !important;
    visibility:visible !important;
    pointer-events:auto !important;
  }
  body:not(.mvip-whiteboard-split-open)
  #wordPresentationPresenter:not([hidden]) > #wordPresentationAccessBanner.is-limited:not([hidden]),
  body:not(.mvip-whiteboard-split-open)
  #singleExamPresenter:not([hidden]) > #singleExamAccessBanner.is-limited:not([hidden]) {
    display:grid !important;
  }
  #singleExamAccessBanner {
    width:100%;
    max-width:none;
    box-sizing:border-box;
    align-self:stretch;
  }

  /* Chế độ chia đôi có thanh công cụ riêng ở từng nửa màn hình. */
  body.mvip-whiteboard-split-open :is(
    #wordPresentationClassSelect,
    #singleExamClassSelect,
    #wordPresentationAccessBanner,
    #singleExamAccessBanner
  ) {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }
</style>

<script id="mvip-unified-presentation-account-controls-script-20260829">
(() => {
  'use strict';

  const wordPresenter = document.getElementById('wordPresentationPresenter');
  const singlePresenter = document.getElementById('singleExamPresenter');
  const wordBanner = document.getElementById('wordPresentationAccessBanner');
  const wordMessage = document.getElementById('wordPresentationAccessMessage');
  const wordAction = document.getElementById('wordPresentationAccessActionBtn');
  const singleBanner = document.getElementById('singleExamAccessBanner');
  const singleMessage = document.getElementById('singleExamAccessMessage');
  const singleAction = document.getElementById('singleExamAccessActionBtn');
  const singleClose = document.getElementById('singleExamCloseBtn');
  const subscriptionModal = document.getElementById('subscriptionModal');
  const subscriptionClose = document.getElementById('subscriptionCloseBtn');
  if (!(wordPresenter instanceof HTMLElement)
      || !(singlePresenter instanceof HTMLElement)
      || !(wordBanner instanceof HTMLElement)
      || !(wordMessage instanceof HTMLElement)
      || !(wordAction instanceof HTMLButtonElement)
      || !(singleBanner instanceof HTMLElement)
      || !(singleMessage instanceof HTMLElement)
      || !(singleAction instanceof HTMLButtonElement)) return;

  const subscriptionHome = subscriptionModal instanceof HTMLElement ? {
    parent:subscriptionModal.parentNode,
    next:subscriptionModal.nextSibling
  } : null;
  let singleHostedSubscription = false;
  let lastRenderKey = '';

  function accountMode() {
    let hasToken = false;
    let tier = '';
    try {
      hasToken = !!(typeof state !== 'undefined' && state.token);
      tier = String((typeof state !== 'undefined' && state.sessionTier) || '').trim().toLowerCase();
    } catch (_) {}
    if (!hasToken || tier === 'guest') return 'guest';
    if (tier === 'limited') return 'limited';
    return '';
  }

  function renderBanner(banner, message, action, mode, presenterOpen, splitOpen) {
    const visible = presenterOpen && !splitOpen && (mode === 'guest' || mode === 'limited');
    banner.hidden = !visible;
    banner.classList.toggle('is-guest', mode === 'guest');
    banner.classList.toggle('is-limited', mode === 'limited');
    if (!visible) {
      message.textContent = '';
      action.textContent = '';
      action.removeAttribute('title');
      return;
    }
    if (mode === 'guest') {
      message.textContent = 'Để sử dụng được đầy đủ các chức năng, bạn cần đăng nhập';
      action.textContent = 'Đăng nhập';
      action.title = 'Đến trang Đăng nhập';
    } else {
      message.textContent = 'Tài khoản miễn phí, một số chức năng không dùng được, bạn cần nâng cấp mvip';
      action.textContent = 'Nâng cấp mvip';
      action.title = 'Mở bảng Nâng cấp MVIP Full bằng VietQR';
    }
  }

  function syncPresentationAccountUi(force = false) {
    const mode = accountMode();
    const splitOpen = document.body.classList.contains('mvip-whiteboard-split-open');
    const wordOpen = !wordPresenter.hidden;
    const singleOpen = !singlePresenter.hidden;
    const key = `${mode}|${splitOpen ? 1 : 0}|${wordOpen ? 1 : 0}|${singleOpen ? 1 : 0}`;
    if (!force && key === lastRenderKey) return;
    lastRenderKey = key;
    renderBanner(wordBanner,wordMessage,wordAction,mode,wordOpen,splitOpen);
    renderBanner(singleBanner,singleMessage,singleAction,mode,singleOpen,splitOpen);
  }

  function restoreSubscriptionHome() {
    if (!singleHostedSubscription || !(subscriptionModal instanceof HTMLElement)
        || !subscriptionHome || !subscriptionHome.parent) return;
    try {
      const next = subscriptionHome.next && subscriptionHome.next.parentNode === subscriptionHome.parent
        ? subscriptionHome.next : null;
      subscriptionHome.parent.insertBefore(subscriptionModal,next);
    } catch (_) {
      try { subscriptionHome.parent.appendChild(subscriptionModal); } catch (_) {}
    }
    singleHostedSubscription = false;
  }

  async function goToLogin() {
    if (window.mvipAccessLoginReturn && typeof window.mvipAccessLoginReturn.begin === 'function') {
      await window.mvipAccessLoginReturn.begin();
      return;
    }
    try {
      if (singleClose instanceof HTMLButtonElement) singleClose.click();
      else singlePresenter.hidden = true;
    } catch (_) {}
    try {
      if (document.fullscreenElement && typeof document.exitFullscreen === 'function') {
        await document.exitFullscreen();
      }
    } catch (_) {}
    try { window.location.hash = '#dang-nhap'; } catch (_) {}
    requestAnimationFrame(() => {
      const loginSection = document.getElementById('dang-nhap');
      if (!loginSection) return;
      try { loginSection.scrollIntoView({behavior:'smooth',block:'start'}); }
      catch (_) { try { loginSection.scrollIntoView(); } catch (_) {} }
    });
  }

  function openUpgradeFromSinglePresenter() {
    if (!(subscriptionModal instanceof HTMLElement) || typeof openSubscriptionModal !== 'function') return;
    const fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || null;
    const singleIsFullscreen = fullscreenElement === singlePresenter
      || (fullscreenElement instanceof Element && singlePresenter.contains(fullscreenElement))
      || singlePresenter.classList.contains('is-fallback-fullscreen');
    if (singleIsFullscreen && !singlePresenter.contains(subscriptionModal)) {
      try {
        singlePresenter.appendChild(subscriptionModal);
        singleHostedSubscription = true;
      } catch (_) {}
    }
    try { openSubscriptionModal(); }
    catch (_) { restoreSubscriptionHome(); }
  }

  singleAction.addEventListener('click',() => {
    const mode = accountMode();
    if (mode === 'guest') {
      const pending = goToLogin();
      if (pending && typeof pending.catch === 'function') pending.catch(() => {});
    } else if (mode === 'limited') {
      openUpgradeFromSinglePresenter();
    }
  });

  if (subscriptionModal instanceof HTMLElement && typeof MutationObserver === 'function') {
    const subscriptionObserver = new MutationObserver(() => {
      if (subscriptionModal.hidden) restoreSubscriptionHome();
    });
    subscriptionObserver.observe(subscriptionModal,{attributes:true,attributeFilter:['hidden']});
  }
  if (subscriptionClose instanceof HTMLButtonElement) {
    subscriptionClose.addEventListener('click',() => setTimeout(restoreSubscriptionHome,0));
  }

  if (typeof MutationObserver === 'function') {
    const uiObserver = new MutationObserver(() => syncPresentationAccountUi());
    uiObserver.observe(document.body,{attributes:true,attributeFilter:['class']});
    uiObserver.observe(wordPresenter,{attributes:true,attributeFilter:['hidden','class']});
    uiObserver.observe(singlePresenter,{attributes:true,attributeFilter:['hidden','class']});
  }
  const syncTimer = window.setInterval(() => syncPresentationAccountUi(),700);
  window.addEventListener('pagehide',() => {
    window.clearInterval(syncTimer);
    restoreSubscriptionHome();
  },{once:true});
  document.addEventListener('fullscreenchange',() => syncPresentationAccountUi(true));
  document.addEventListener('webkitfullscreenchange',() => syncPresentationAccountUi(true));
  syncPresentationAccountUi(true);
})();
</script>

<!-- Bản điều chỉnh 2026-08-29: thêm máy tính nhỏ vào toàn bộ bộ công cụ viết/vẽ. -->
<style id="mvip-drawing-calculator-style-legacy-20260829">
  .mvip-calculator-open-btn {
    order:75 !important;
    color:#1e40af !important;
  }
  .mvip-calculator-open-btn:hover,
  .mvip-calculator-open-btn[aria-pressed="true"] {
    border-color:#2563eb !important;
    background:#eff6ff !important;
    color:#1d4ed8 !important;
    box-shadow:0 0 0 2px rgba(37,99,235,.14) !important;
  }
  .mvip-calculator-open-btn svg {
    width:20px;
    height:20px;
    display:block;
    pointer-events:none;
  }
  body.mvip-whiteboard-split-open
  .mvip-split-horizontal-ink-dock .mvip-calculator-open-btn {
    display:inline-flex !important;
    visibility:visible !important;
    width:32px !important;
    min-width:32px !important;
    height:32px !important;
    min-height:32px !important;
    padding:0 !important;
    flex:0 0 32px !important;
    pointer-events:auto !important;
  }
  body.mvip-whiteboard-split-open
  #wordPresentationPresenter.mvip-whiteboard-split.is-powerpoint-slide-mode
  > #mvipPowerPointSplitLeftToolStrip > #wordPresentationSideInkDock
  .mvip-calculator-open-btn {
    width:28px !important;
    min-width:28px !important;
    height:28px !important;
    min-height:28px !important;
    flex-basis:28px !important;
  }

  #mvipCalculatorPanel[hidden] { display:none !important; }
  #mvipCalculatorPanel {
    position:fixed;
    top:74px;
    right:18px;
    z-index:2147483646;
    width:min(370px, calc(100vw - 20px));
    box-sizing:border-box;
    overflow:hidden;
    border:2px solid #2563eb;
    border-radius:16px;
    background:#f8fafc;
    color:#0f172a;
    box-shadow:0 24px 64px rgba(15,23,42,.38);
    font-family:Arial,Helvetica,sans-serif;
    user-select:none;
    -webkit-user-select:none;
  }
  .mvip-calculator-head {
    height:46px;
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:0 8px 0 13px;
    border-bottom:1px solid #bfdbfe;
    background:#eff6ff;
    color:#1e3a8a;
    cursor:grab;
    touch-action:none;
  }
  #mvipCalculatorPanel.is-dragging .mvip-calculator-head { cursor:grabbing; }
  .mvip-calculator-title {
    min-width:0;
    display:flex;
    align-items:center;
    gap:8px;
    font-size:15px;
    font-weight:900;
  }
  .mvip-calculator-title svg { width:21px; height:21px; flex:0 0 auto; }
  .mvip-calculator-close {
    width:32px;
    min-width:32px;
    height:32px;
    padding:0;
    border:1px solid #f87171;
    border-radius:9px;
    background:#fff;
    color:#b91c1c;
    font:900 21px/1 Arial,Helvetica,sans-serif;
    cursor:pointer;
  }
  .mvip-calculator-close:hover { background:#fef2f2; }
  .mvip-calculator-display-wrap {
    padding:11px 12px 8px;
    background:#fff;
  }
  .mvip-calculator-expression {
    height:18px;
    overflow:hidden;
    color:#64748b;
    font-size:12px;
    font-weight:700;
    line-height:18px;
    text-align:right;
    white-space:nowrap;
    text-overflow:ellipsis;
  }
  .mvip-calculator-display {
    min-height:58px;
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:flex-end;
    overflow:hidden;
    color:#0f172a;
    font-size:34px;
    font-weight:900;
    line-height:1.15;
    text-align:right;
    white-space:nowrap;
    font-variant-numeric:tabular-nums;
  }
  #mvipCalculatorPanel.is-error .mvip-calculator-display {
    color:#b91c1c;
    font-size:22px;
  }
  .mvip-calculator-grid {
    display:grid;
    grid-template-columns:repeat(5, minmax(0,1fr));
    gap:7px;
    padding:10px 12px 13px;
    border-top:1px solid #e2e8f0;
    background:#f8fafc;
  }
  .mvip-calculator-key {
    height:46px;
    padding:0;
    border:1px solid #cbd5e1;
    border-radius:11px;
    background:#fff;
    color:#0f172a;
    box-shadow:0 1px 2px rgba(15,23,42,.08);
    font:900 20px/1 Arial,Helvetica,sans-serif;
    cursor:pointer;
  }
  .mvip-calculator-key:hover { border-color:#60a5fa; background:#eff6ff; }
  .mvip-calculator-key:active { transform:translateY(1px); }
  .mvip-calculator-key.is-function {
    background:#f1f5f9;
    color:#334155;
    font-size:16px;
  }
  .mvip-calculator-key.is-operator {
    border-color:#93c5fd;
    background:#dbeafe;
    color:#1d4ed8;
    font-size:23px;
  }
  .mvip-calculator-key.is-equals {
    border-color:#2563eb;
    background:#2563eb;
    color:#fff;
    font-size:24px;
  }
  .mvip-calculator-key.is-equals:hover { background:#1d4ed8; }
  .mvip-calculator-key.is-equals { grid-column:span 2; }
  .mvip-calculator-key.is-zero { grid-column:span 3; }
  @media (max-width:520px), (max-height:620px) {
    #mvipCalculatorPanel { top:54px; right:8px; width:min(340px,calc(100vw - 16px)); }
    .mvip-calculator-head { height:40px; }
    .mvip-calculator-display { min-height:42px; font-size:27px; }
    .mvip-calculator-grid { gap:5px; padding:8px 9px 10px; }
    .mvip-calculator-key { height:40px; }
  }
</style>

<script id="mvip-drawing-calculator-script-legacy-20260829">
(() => {
  'use strict';
  return; // Đã được thay bằng bộ giả lập fx-500MS ở phần kế tiếp.
  if (document.getElementById('mvipCalculatorPanel')) return;

  const CALCULATOR_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><rect x="4" y="2.5" width="16" height="19" rx="2.5" stroke="currentColor" stroke-width="2"/><rect x="7" y="5.5" width="10" height="4" rx="1" stroke="currentColor" stroke-width="1.6"/><path d="M8 13h2M14 13h2M8 17h2M14 17h2" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>';
  const panel = document.createElement('section');
  panel.id = 'mvipCalculatorPanel';
  panel.hidden = true;
  panel.setAttribute('role','dialog');
  panel.setAttribute('aria-modal','false');
  panel.setAttribute('aria-label','Máy tính');
  panel.innerHTML = [
    '<header class="mvip-calculator-head" id="mvipCalculatorDragHandle">',
      '<div class="mvip-calculator-title">',CALCULATOR_ICON,'<span>Máy tính</span></div>',
      '<button class="mvip-calculator-close" id="mvipCalculatorCloseBtn" type="button" title="Đóng máy tính" aria-label="Đóng máy tính">×</button>',
    '</header>',
    '<div class="mvip-calculator-display-wrap">',
      '<div class="mvip-calculator-expression" id="mvipCalculatorExpression" aria-hidden="true"></div>',
      '<div class="mvip-calculator-display" id="mvipCalculatorDisplay" aria-live="polite">0</div>',
    '</div>',
    '<div class="mvip-calculator-grid">',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="clear">AC</button>',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="backspace" aria-label="Xóa một chữ số">⌫</button>',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="leftParen" aria-label="Mở ngoặc">(</button>',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="rightParen" aria-label="Đóng ngoặc">)</button>',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="sqrt" aria-label="Căn bậc hai">√</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="7">7</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="8">8</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="9">9</button>',
      '<button class="mvip-calculator-key is-operator" type="button" data-calc-key="divide" aria-label="Chia">÷</button>',
      '<button class="mvip-calculator-key is-operator" type="button" data-calc-key="multiply" aria-label="Nhân">×</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="4">4</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="5">5</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="6">6</button>',
      '<button class="mvip-calculator-key is-operator" type="button" data-calc-key="subtract" aria-label="Trừ">−</button>',
      '<button class="mvip-calculator-key is-operator" type="button" data-calc-key="add" aria-label="Cộng">+</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="1">1</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="2">2</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="3">3</button>',
      '<button class="mvip-calculator-key is-equals" type="button" data-calc-key="equals" aria-label="Bằng">=</button>',
      '<button class="mvip-calculator-key is-function" type="button" data-calc-key="sign" aria-label="Đổi dấu">±</button>',
      '<button class="mvip-calculator-key is-zero" type="button" data-calc-key="0">0</button>',
      '<button class="mvip-calculator-key" type="button" data-calc-key="decimal" aria-label="Dấu thập phân">.</button>',
    '</div>'
  ].join('');
  document.body.appendChild(panel);

  const display = panel.querySelector('#mvipCalculatorDisplay');
  const expression = panel.querySelector('#mvipCalculatorExpression');
  const closeBtn = panel.querySelector('#mvipCalculatorCloseBtn');
  const dragHandle = panel.querySelector('#mvipCalculatorDragHandle');
  if (!(display instanceof HTMLElement)
      || !(expression instanceof HTMLElement)
      || !(closeBtn instanceof HTMLButtonElement)
      || !(dragHandle instanceof HTMLElement)) return;

  let expressionValue = '';
  let visibleFormula = '';
  let statusText = '';
  let errorState = false;
  let justEvaluated = false;
  let lastTrigger = null;
  let drag = null;

  function pretty(value) {
    return String(value == null ? '' : value)
      .replace(/\*/g,'×')
      .replace(/\//g,'÷')
      .replace(/-/g,'−');
  }

  function numberString(value) {
    if (!Number.isFinite(value)) return '';
    const absolute = Math.abs(value);
    if ((absolute >= 1e12) || (absolute > 0 && absolute < 1e-9)) {
      return value.toExponential(8).replace(/\.?0+e/,'e');
    }
    return String(Number(value.toPrecision(12)));
  }

  function displayFontSize(text) {
    const length = Array.from(String(text || '')).length;
    if (length <= 13) return 34;
    if (length <= 18) return 29;
    if (length <= 24) return 24;
    if (length <= 31) return 20;
    if (length <= 39) return 17;
    if (length <= 47) return 14;
    if (length <= 58) return 12;
    return 10;
  }

  function updateDisplay() {
    const text = visibleFormula || pretty(expressionValue || '0');
    display.textContent = text;
    display.title = text;
    display.style.fontSize = displayFontSize(text) + 'px';
    expression.textContent = statusText || 'Nhập toàn bộ phép tính rồi bấm =';
    panel.classList.toggle('is-error',errorState);
  }

  function clearCalculator() {
    expressionValue = '';
    visibleFormula = '';
    statusText = '';
    errorState = false;
    justEvaluated = false;
    updateDisplay();
  }

  function showError(message) {
    const formula = pretty(expressionValue || '0');
    visibleFormula = formula + ' → ' + String(message || 'Lỗi phép tính');
    statusText = 'Bạn có thể xóa lùi để sửa phép tính';
    errorState = true;
    justEvaluated = false;
    updateDisplay();
  }

  function dismissError() {
    if (!errorState) return;
    errorState = false;
    visibleFormula = '';
    statusText = '';
  }

  function beginNewExpressionIfNeeded() {
    dismissError();
    if (!justEvaluated) return;
    expressionValue = '';
    visibleFormula = '';
    statusText = '';
    justEvaluated = false;
  }

  function canAppend(value) {
    if (expressionValue.length + String(value || '').length <= 42) return true;
    statusText = 'Phép tính đã đạt độ dài tối đa';
    updateDisplay();
    return false;
  }

  function appendExpression(value) {
    const text = String(value || '');
    if (!text || !canAppend(text)) return false;
    expressionValue += text;
    visibleFormula = '';
    statusText = '';
    updateDisplay();
    return true;
  }

  function lastCharacter() {
    return expressionValue.slice(-1);
  }

  function isOperator(character) {
    return ['+','-','*','/'].includes(character);
  }

  function inputDigit(digit) {
    beginNewExpressionIfNeeded();
    const last = lastCharacter();
    if (last === ')') {
      if (!appendExpression('*')) return;
    }
    appendExpression(String(digit));
  }

  function currentNumberToken() {
    const match = expressionValue.match(/(?:^|[+\-*/(√])(-?(?:\d+(?:\.\d*)?|\.\d+))$/);
    return match ? String(match[1] || '') : '';
  }

  function inputDecimal() {
    beginNewExpressionIfNeeded();
    let last = lastCharacter();
    if (last === ')') {
      if (!appendExpression('*')) return;
      last = '*';
    }
    const token = currentNumberToken();
    if (token.includes('.')) return;
    if (!expressionValue || isOperator(last) || last === '(' || last === '√') appendExpression('0.');
    else appendExpression('.');
  }

  function inputLeftParenthesis() {
    beginNewExpressionIfNeeded();
    let last = lastCharacter();
    if (last === '.') {
      if (!appendExpression('0')) return;
      last = '0';
    }
    if (/[\d)]/.test(last)) appendExpression('*(');
    else appendExpression('(');
  }

  function inputRightParenthesis() {
    dismissError();
    if (justEvaluated) return;
    const openCount = (expressionValue.match(/\(/g) || []).length;
    const closeCount = (expressionValue.match(/\)/g) || []).length;
    if (openCount <= closeCount) return;
    let last = lastCharacter();
    if (last === '.') {
      if (!appendExpression('0')) return;
      last = '0';
    }
    if (/[\d)]/.test(last)) appendExpression(')');
  }

  function squareRoot() {
    beginNewExpressionIfNeeded();
    const last = lastCharacter();
    if (/[\d)]/.test(last)) appendExpression('*√(');
    else appendExpression('√(');
  }

  function chooseOperator(operator) {
    dismissError();
    const symbol = ({add:'+',subtract:'-',multiply:'*',divide:'/'})[operator] || '';
    if (!symbol) return;
    if (justEvaluated) {
      visibleFormula = '';
      statusText = '';
      justEvaluated = false;
    }
    let last = lastCharacter();
    if (!expressionValue) {
      if (symbol === '-') appendExpression('-');
      return;
    }
    if (last === '.') {
      if (!appendExpression('0')) return;
      last = '0';
    }
    if (isOperator(last)) {
      const before = expressionValue.slice(-2,-1);
      const unaryMinus = last === '-' && (!before || isOperator(before) || before === '(');
      if (unaryMinus) return;
      expressionValue = expressionValue.slice(0,-1) + symbol;
      visibleFormula = '';
      statusText = '';
      updateDisplay();
      return;
    }
    if (last === '(' || last === '√') {
      if (symbol === '-') appendExpression('-');
      return;
    }
    if (/[\d)]/.test(last)) appendExpression(symbol);
  }

  function toggleSign() {
    dismissError();
    if (justEvaluated) {
      visibleFormula = '';
      statusText = '';
      justEvaluated = false;
    }
    if (!expressionValue) {
      appendExpression('-');
      return;
    }
    const match = expressionValue.match(/(\d+(?:\.\d*)?(?:e[+\-]?\d+)?)$/i);
    if (!match) return;
    const start = expressionValue.length - match[1].length;
    const previous = expressionValue.charAt(start - 1);
    const beforePrevious = expressionValue.charAt(start - 2);
    const unary = previous === '-' && (start - 1 === 0 || isOperator(beforePrevious) || beforePrevious === '(');
    if (unary) expressionValue = expressionValue.slice(0,start - 1) + expressionValue.slice(start);
    else if (canAppend('-')) expressionValue = expressionValue.slice(0,start) + '-' + expressionValue.slice(start);
    visibleFormula = '';
    statusText = '';
    updateDisplay();
  }

  function backspace() {
    dismissError();
    visibleFormula = '';
    statusText = '';
    justEvaluated = false;
    expressionValue = expressionValue.slice(0,-1);
    updateDisplay();
  }

  function parseCalculation(source) {
    const input = String(source || '').replace(/\s+/g,'');
    let index = 0;

    function parseExpressionValue() {
      let value = parseTerm();
      while (index < input.length) {
        const character = input.charAt(index);
        if (character !== '+' && character !== '-') break;
        index += 1;
        const right = parseTerm();
        value = character === '+' ? value + right : value - right;
      }
      return value;
    }

    function parseTerm() {
      let value = parseUnary();
      while (index < input.length) {
        const character = input.charAt(index);
        if (character !== '*' && character !== '/') break;
        index += 1;
        const right = parseUnary();
        if (character === '/' && right === 0) throw new Error('Không thể chia cho 0');
        value = character === '*' ? value * right : value / right;
      }
      return value;
    }

    function parseUnary() {
      const character = input.charAt(index);
      if (character === '+') {
        index += 1;
        return parseUnary();
      }
      if (character === '-') {
        index += 1;
        return -parseUnary();
      }
      if (character === '√') {
        index += 1;
        const radicand = parseUnary();
        if (radicand < 0) throw new Error('Không căn được số âm');
        return Math.sqrt(radicand);
      }
      return parsePrimary();
    }

    function parsePrimary() {
      if (input.charAt(index) === '(') {
        index += 1;
        const value = parseExpressionValue();
        if (input.charAt(index) !== ')') throw new Error('Thiếu dấu )');
        index += 1;
        return value;
      }
      const match = input.slice(index).match(/^(?:\d+(?:\.\d*)?|\.\d+)(?:e[+\-]?\d+)?/i);
      if (!match) throw new Error('Phép tính chưa hoàn chỉnh');
      index += match[0].length;
      return Number(match[0]);
    }

    const result = parseExpressionValue();
    if (index !== input.length) throw new Error('Phép tính chưa hoàn chỉnh');
    if (!Number.isFinite(result)) throw new Error('Kết quả không hợp lệ');
    return result;
  }

  function equals() {
    dismissError();
    if (!expressionValue) return;
    let calculation = expressionValue;
    if (calculation.endsWith('.')) calculation += '0';
    if (isOperator(calculation.slice(-1)) || calculation.endsWith('(') || calculation.endsWith('√')) {
      statusText = 'Phép tính chưa hoàn chỉnh';
      updateDisplay();
      return;
    }
    const openCount = (calculation.match(/\(/g) || []).length;
    const closeCount = (calculation.match(/\)/g) || []).length;
    if (openCount > closeCount) calculation += ')'.repeat(openCount - closeCount);
    try {
      const result = parseCalculation(calculation);
      const text = numberString(result);
      if (!text) throw new Error('Kết quả không hợp lệ');
      visibleFormula = pretty(calculation) + ' = ' + pretty(text);
      expressionValue = text;
      statusText = 'Kết quả';
      errorState = false;
      justEvaluated = true;
      updateDisplay();
    } catch (error) {
      expressionValue = calculation;
      showError(error && error.message ? error.message : 'Lỗi phép tính');
    }
  }

  function handleKey(key) {
    if (/^\d$/.test(key)) inputDigit(key);
    else if (key === 'decimal') inputDecimal();
    else if (key === 'leftParen') inputLeftParenthesis();
    else if (key === 'rightParen') inputRightParenthesis();
    else if (key === 'sign') toggleSign();
    else if (key === 'backspace') backspace();
    else if (key === 'clear') clearCalculator();
    else if (key === 'sqrt') squareRoot();
    else if (key === 'equals') equals();
    else if (['add','subtract','multiply','divide'].includes(key)) chooseOperator(key);
  }

  function fullscreenElement() {
    return document.fullscreenElement || document.webkitFullscreenElement || null;
  }

  function mountForCurrentFullscreen() {
    const fullscreen = fullscreenElement();
    const host = fullscreen instanceof HTMLElement ? fullscreen : document.body;
    if (panel.parentElement !== host) host.appendChild(panel);
  }

  function syncOpenButtons() {
    document.querySelectorAll('[data-mvip-calculator-open="1"]').forEach((button) => {
      if (button instanceof HTMLElement) button.setAttribute('aria-pressed',panel.hidden ? 'false' : 'true');
    });
  }

  function clampPanel() {
    if (panel.hidden) return;
    const rect = panel.getBoundingClientRect();
    const left = Math.max(4,Math.min(rect.left,Math.max(4,window.innerWidth - rect.width - 4)));
    const top = Math.max(4,Math.min(rect.top,Math.max(4,window.innerHeight - rect.height - 4)));
    panel.style.left = left + 'px';
    panel.style.top = top + 'px';
    panel.style.right = 'auto';
  }

  function openCalculator(trigger) {
    lastTrigger = trigger instanceof HTMLElement ? trigger : lastTrigger;
    mountForCurrentFullscreen();
    panel.hidden = false;
    syncOpenButtons();
    requestAnimationFrame(() => {
      clampPanel();
      const first = panel.querySelector('[data-calc-key]');
      if (first instanceof HTMLElement) {
        try { first.focus({preventScroll:true}); } catch (_) { try { first.focus(); } catch (_) {} }
      }
    });
  }

  function closeCalculator() {
    panel.hidden = true;
    panel.classList.remove('is-dragging');
    drag = null;
    syncOpenButtons();
    if (panel.parentElement !== document.body) document.body.appendChild(panel);
    if (lastTrigger instanceof HTMLElement && lastTrigger.isConnected) {
      try { lastTrigger.focus({preventScroll:true}); } catch (_) {}
    }
  }

  function installButton(dockId,buttonId,className,beforeSelector) {
    const dock = document.getElementById(dockId);
    if (!(dock instanceof HTMLElement)) return false;
    if (document.getElementById(buttonId)) return true;
    const button = document.createElement('button');
    button.type = 'button';
    button.id = buttonId;
    button.className = className + ' mvip-calculator-open-btn';
    button.setAttribute('data-mvip-calculator-open','1');
    button.setAttribute('aria-label','Mở máy tính');
    button.setAttribute('aria-pressed','false');
    button.title = 'Máy tính: cộng, trừ, nhân, chia, dấu ngoặc và căn bậc hai';
    button.innerHTML = CALCULATOR_ICON;
    button.addEventListener('pointerdown',(event) => {
      event.stopPropagation();
    });
    button.addEventListener('click',(event) => {
      event.preventDefault();
      event.stopPropagation();
      openCalculator(button);
    });
    const before = beforeSelector ? dock.querySelector(beforeSelector) : null;
    dock.insertBefore(button,before instanceof Node ? before : null);
    return true;
  }

  function installAllButtons() {
    const word = installButton(
      'wordPresentationSideInkDock',
      'wordPresentationCalculatorBtn',
      'cv7991-side-ink-tool',
      '.cv7991-side-ink-undo, .cv7991-side-ink-clear, .cv7991-side-ink-popover'
    );
    const single = installButton(
      'singleExamSideInkDock',
      'singleExamCalculatorBtn',
      'cv7991-side-ink-tool',
      '.cv7991-side-ink-undo, .cv7991-side-ink-clear, .cv7991-side-ink-popover'
    );
    const whiteboard = installButton(
      'mvipWhiteboardToolDock',
      'mvipWhiteboardCalculatorBtn',
      'mvip-whiteboard-action-btn',
      '#mvipWhiteboardUndoBtn'
    );
    const zoom = installButton(
      'wordImageZoomInkTools',
      'wordImageZoomCalculatorBtn',
      'word-image-zoom-ink-tool-btn',
      '.word-image-zoom-ink-undo-btn, .word-image-zoom-ink-clear-btn, .word-image-zoom-ink-popover'
    );
    return word && single && whiteboard && zoom;
  }

  panel.querySelectorAll('[data-calc-key]').forEach((button) => {
    button.addEventListener('click',(event) => {
      event.preventDefault();
      event.stopPropagation();
      handleKey(String(button.getAttribute('data-calc-key') || ''));
    });
  });
  panel.addEventListener('pointerdown',(event) => event.stopPropagation());
  panel.addEventListener('click',(event) => event.stopPropagation());
  closeBtn.addEventListener('click',(event) => {
    event.preventDefault();
    event.stopPropagation();
    closeCalculator();
  });

  dragHandle.addEventListener('pointerdown',(event) => {
    if (event.button !== 0 || (event.target instanceof Element && event.target.closest('button'))) return;
    const rect = panel.getBoundingClientRect();
    drag = {pointerId:event.pointerId,x:event.clientX,y:event.clientY,left:rect.left,top:rect.top};
    panel.classList.add('is-dragging');
    panel.style.left = rect.left + 'px';
    panel.style.top = rect.top + 'px';
    panel.style.right = 'auto';
    try { dragHandle.setPointerCapture(event.pointerId); } catch (_) {}
    event.preventDefault();
    event.stopPropagation();
  });
  dragHandle.addEventListener('pointermove',(event) => {
    if (!drag || event.pointerId !== drag.pointerId) return;
    const maxLeft = Math.max(4,window.innerWidth - panel.offsetWidth - 4);
    const maxTop = Math.max(4,window.innerHeight - panel.offsetHeight - 4);
    panel.style.left = Math.max(4,Math.min(maxLeft,drag.left + event.clientX - drag.x)) + 'px';
    panel.style.top = Math.max(4,Math.min(maxTop,drag.top + event.clientY - drag.y)) + 'px';
    event.preventDefault();
    event.stopPropagation();
  });
  const finishDrag = (event) => {
    if (!drag || (event && event.pointerId !== drag.pointerId)) return;
    try { dragHandle.releasePointerCapture(drag.pointerId); } catch (_) {}
    drag = null;
    panel.classList.remove('is-dragging');
  };
  dragHandle.addEventListener('pointerup',finishDrag);
  dragHandle.addEventListener('pointercancel',finishDrag);
  dragHandle.addEventListener('lostpointercapture',finishDrag);

  document.addEventListener('keydown',(event) => {
    if (panel.hidden) return;
    const keyMap = {
      '+':'add','-':'subtract','*':'multiply','x':'multiply','X':'multiply',
      '/':'divide',':':'divide','Enter':'equals','=':'equals',
      '(':'leftParen',')':'rightParen',
      '.':'decimal',',':'decimal','Backspace':'backspace','Delete':'clear',
      'c':'clear','C':'clear','r':'sqrt','R':'sqrt'
    };
    let action = /^\d$/.test(event.key) ? event.key : keyMap[event.key];
    if (event.key === 'Escape') {
      event.preventDefault();
      event.stopImmediatePropagation();
      closeCalculator();
      return;
    }
    if (!action) return;
    event.preventDefault();
    event.stopImmediatePropagation();
    handleKey(action);
  },true);

  document.addEventListener('fullscreenchange',() => {
    if (panel.hidden) return;
    mountForCurrentFullscreen();
    requestAnimationFrame(clampPanel);
  });
  document.addEventListener('webkitfullscreenchange',() => {
    if (panel.hidden) return;
    mountForCurrentFullscreen();
    requestAnimationFrame(clampPanel);
  });
  window.addEventListener('resize',() => requestAnimationFrame(clampPanel));

  if (!installAllButtons()) {
    let attempts = 0;
    const timer = window.setInterval(() => {
      attempts += 1;
      if (installAllButtons() || attempts >= 30) window.clearInterval(timer);
    },200);
  }
  clearCalculator();
})();
</script>

<!-- Bản điều chỉnh 2026-08-29: thay máy tính đơn giản bằng giả lập khoa học fx-500MS. -->
<style id="mvip-fx500ms-calculator-style-20260829">
  #mvipCalculatorPanel[hidden] { display:none !important; }
  #mvipCalculatorPanel {
    position:fixed;
    top:0;
    right:4px;
    z-index:2147483646;
    width:414px;
    max-height:none;
    box-sizing:border-box;
    overflow:hidden;
    border:1px solid #111827;
    border-radius:18px;
    background:#24282c;
    color:#f8fafc;
    box-shadow:0 28px 76px rgba(0,0,0,.48),0 0 0 2px rgba(255,255,255,.12) inset;
    font-family:Arial,Helvetica,sans-serif;
    scrollbar-width:thin;
    scrollbar-color:#64748b #202428;
    user-select:none;
    -webkit-user-select:none;
    transform-origin:top left;
    will-change:transform;
  }
  .mvip-calculator-head {
    position:sticky;
    top:0;
    z-index:5;
    height:39px;
    box-sizing:border-box;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    padding:0 7px 0 12px;
    border:0;
    border-bottom:1px solid #0f172a;
    background:linear-gradient(#41484f,#2d3338);
    color:#f8fafc;
    cursor:grab;
    touch-action:none;
  }
  #mvipCalculatorPanel.is-dragging .mvip-calculator-head { cursor:grabbing; }
  .mvip-calculator-title {
    min-width:0;
    display:flex;
    align-items:center;
    gap:7px;
    font-size:12px;
    font-weight:800;
    letter-spacing:.02em;
  }
  .mvip-calculator-title svg { width:18px; height:18px; flex:0 0 auto; }
  .mvip-calculator-title small { color:#cbd5e1; font-size:10px; font-weight:700; }
  .mvip-calculator-close {
    width:29px;
    min-width:29px;
    height:27px;
    padding:0;
    border:1px solid #aeb6bf;
    border-radius:7px;
    background:#eef2f4;
    color:#111827;
    box-shadow:0 1px 0 #fff inset,0 2px 3px rgba(0,0,0,.25);
    font:900 19px/1 Arial,Helvetica,sans-serif;
    cursor:pointer;
  }
  .mvip-calculator-close:hover { background:#fff; color:#b91c1c; }
  .mvip-fx-shell {
    padding:9px 12px 10px;
    background:
      radial-gradient(circle at 14% 2%,rgba(255,255,255,.12),transparent 25%),
      linear-gradient(145deg,#4b5157 0,#2b3035 46%,#1d2125 100%);
  }
  .mvip-fx-brand-row {
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:8px;
    padding:0 5px 5px;
    text-shadow:0 1px 1px #000;
  }
  .mvip-fx-brand {
    color:#fff;
    font-size:21px;
    font-weight:900;
    letter-spacing:.06em;
    line-height:1;
  }
  .mvip-fx-model {
    color:#f8fafc;
    font-size:17px;
    font-style:italic;
    font-weight:800;
    letter-spacing:.01em;
  }
  .mvip-fx-model strong { font-size:20px; font-weight:900; }
  .mvip-fx-subbrand {
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    margin:0 5px 7px;
    color:#dbe4eb;
    font-size:8px;
    font-weight:800;
    letter-spacing:.13em;
    text-transform:uppercase;
  }
  .mvip-fx-solar {
    width:94px;
    height:15px;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:1px;
    overflow:hidden;
    border:2px ridge #3f454b;
    border-radius:2px;
    background:#281c19;
    box-shadow:0 1px 2px rgba(0,0,0,.55) inset;
  }
  .mvip-fx-solar i { border-right:1px solid #4a322d; background:linear-gradient(90deg,#2e1b19,#604038); }
  .mvip-fx-lcd-frame {
    margin:0 1px 8px;
    padding:6px 8px 7px;
    border:3px ridge #777f86;
    border-radius:5px;
    background:#111518;
    box-shadow:0 3px 7px rgba(0,0,0,.55);
  }
  .mvip-fx-lcd {
    min-height:78px;
    box-sizing:border-box;
    overflow:hidden;
    border:1px solid #0f1712;
    border-radius:2px;
    background:linear-gradient(145deg,#cbd5ad,#aebd91);
    color:#152019;
    box-shadow:0 2px 8px rgba(12,20,13,.45) inset,0 1px 0 rgba(255,255,255,.22);
    font-family:"Courier New",Consolas,monospace;
  }
  .mvip-fx-lcd-status {
    height:15px;
    display:flex;
    align-items:center;
    gap:7px;
    padding:1px 6px 0;
    color:#26352a;
    font-size:10px;
    font-weight:900;
    line-height:14px;
  }
  .mvip-fx-indicator { opacity:.13; }
  .mvip-fx-indicator.is-on { opacity:1; }
  .mvip-fx-angle { margin-left:auto; opacity:1; }
  .mvip-fx-lcd-expression,
  .mvip-fx-lcd-result {
    box-sizing:border-box;
    overflow:hidden;
    padding:0 6px;
    white-space:nowrap;
    text-overflow:clip;
    font-variant-numeric:tabular-nums;
  }
  .mvip-fx-lcd-expression {
    height:25px;
    font-size:16px;
    font-weight:700;
    line-height:25px;
  }
  .mvip-fx-lcd-result {
    height:32px;
    font-size:25px;
    font-weight:900;
    line-height:31px;
    text-align:right;
  }
  #mvipCalculatorPanel.is-error .mvip-fx-lcd-result { font-size:18px; }
  .mvip-fx-control-row {
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:8px;
    margin:0 9px 5px;
  }
  .mvip-fx-control-key {
    height:27px;
    padding:0 3px;
    border:1px solid #0b0f12;
    border-radius:12px 12px 8px 8px;
    background:linear-gradient(#5e666d,#30363b);
    color:#fff;
    box-shadow:0 1px 0 rgba(255,255,255,.24) inset,0 2px 2px rgba(0,0,0,.5);
    font:800 10px/1 Arial,Helvetica,sans-serif;
    cursor:pointer;
  }
  .mvip-fx-control-key.is-shift { color:#f7df49; }
  .mvip-fx-control-key.is-alpha { color:#f57a83; }
  .mvip-fx-control-key.is-active { box-shadow:0 0 0 2px currentColor,0 1px 0 rgba(255,255,255,.2) inset; }
  .mvip-fx-replay-row {
    display:grid;
    grid-template-columns:54px 1fr 54px;
    align-items:center;
    gap:9px;
    width:222px;
    margin:0 auto 6px;
  }
  .mvip-fx-replay-side,
  .mvip-fx-replay-pad button {
    border:1px solid #0b0f12;
    background:linear-gradient(#5f676e,#30363b);
    color:#fff;
    box-shadow:0 1px 0 rgba(255,255,255,.2) inset,0 2px 2px rgba(0,0,0,.45);
    cursor:pointer;
  }
  .mvip-fx-replay-side { height:25px; border-radius:10px; font:900 15px/1 Arial,sans-serif; }
  .mvip-fx-replay-pad {
    height:50px;
    position:relative;
    border:1px solid #111;
    border-radius:50%;
    background:linear-gradient(#767e84,#3c4247);
    box-shadow:0 1px 1px rgba(255,255,255,.22) inset,0 2px 4px rgba(0,0,0,.5);
  }
  .mvip-fx-replay-pad::after {
    content:"REPLAY";
    position:absolute;
    inset:17px 0 auto;
    color:#e5e7eb;
    font-size:8px;
    font-weight:800;
    letter-spacing:.07em;
    text-align:center;
    pointer-events:none;
  }
  .mvip-fx-replay-pad button {
    position:absolute;
    width:31px;
    height:20px;
    padding:0;
    border-radius:8px;
    font:900 12px/1 Arial,sans-serif;
  }
  .mvip-fx-replay-pad .is-up { top:1px; left:50%; transform:translateX(-50%); }
  .mvip-fx-replay-pad .is-down { bottom:1px; left:50%; transform:translateX(-50%); }
  .mvip-fx-key-grid {
    display:grid;
    grid-template-columns:repeat(5,minmax(0,1fr));
    gap:13px 9px;
  }
  .mvip-fx-science-grid { margin:7px 1px 13px; }
  .mvip-fx-number-grid { margin:0 1px; }
  .mvip-fx-key {
    position:relative;
    min-width:0;
    height:34px;
    padding:6px 2px 1px;
    border:1px solid #090c0e;
    border-radius:5px 5px 9px 9px;
    background:linear-gradient(#646d74,#343a3f 48%,#282d31);
    color:#fff;
    box-shadow:0 1px 0 rgba(255,255,255,.25) inset,0 3px 2px rgba(0,0,0,.48);
    font:800 12px/1 Arial,Helvetica,sans-serif;
    cursor:pointer;
  }
  .mvip-fx-key:hover,
  .mvip-fx-control-key:hover,
  .mvip-fx-replay-side:hover,
  .mvip-fx-replay-pad button:hover { filter:brightness(1.18); }
  .mvip-fx-key:active,
  .mvip-fx-control-key:active,
  .mvip-fx-replay-side:active,
  .mvip-fx-replay-pad button:active { transform:translateY(1px); }
  .mvip-fx-key-main { display:block; white-space:nowrap; }
  .mvip-fx-key-alt,
  .mvip-fx-key-alpha {
    position:absolute;
    max-width:100%;
    overflow:hidden;
    font-weight:900;
    white-space:nowrap;
  }
  .mvip-fx-key-alt {
    top:-13px;
    left:1px;
    color:#f7df49;
    font-size:11px;
    line-height:13px;
    text-shadow:0 1px 1px rgba(0,0,0,.9);
  }
  .mvip-fx-key-alpha {
    top:-9px;
    right:1px;
    color:#ff7e89;
    font-size:7px;
    line-height:9px;
  }
  .mvip-fx-number-grid .mvip-fx-key {
    height:39px;
    padding-top:4px;
    border-radius:6px 6px 10px 10px;
    background:linear-gradient(#262c31,#0f1316 52%,#07090b);
    font-size:19px;
  }
  .mvip-fx-number-grid .mvip-fx-key.is-operation { font-size:21px; }
  .mvip-fx-number-grid .mvip-fx-key.is-danger {
    background:linear-gradient(#d9898d,#a8444b 52%,#842d34);
    font-size:12px;
  }
  .mvip-fx-number-grid .mvip-fx-key.is-equals {
    grid-column:span 2;
    background:linear-gradient(#7c8790,#41484e 52%,#2c3237);
    font-size:22px;
  }
  .mvip-fx-hint {
    min-height:18px;
    box-sizing:border-box;
    overflow:hidden;
    padding:5px 4px 0;
    color:#d6dde3;
    font-size:9px;
    font-weight:700;
    line-height:13px;
    text-align:center;
    white-space:nowrap;
    text-overflow:ellipsis;
  }
  @media (max-width:520px) {
    .mvip-fx-shell { padding:7px 10px 8px; }
    .mvip-fx-brand { font-size:18px; }
    .mvip-fx-model { font-size:15px; }
    .mvip-fx-lcd-frame { margin-bottom:6px; }
    .mvip-fx-replay-row { height:42px; margin-bottom:5px; }
    .mvip-fx-replay-pad { height:44px; }
    .mvip-fx-replay-pad::after { inset:14px 0 auto; }
    .mvip-fx-key-grid { gap:13px 7px; }
    .mvip-fx-key { height:31px; }
    .mvip-fx-number-grid .mvip-fx-key { height:35px; }
  }
  @media (max-width:360px) {
    .mvip-fx-shell { padding-left:7px; padding-right:7px; }
    .mvip-fx-key-grid { column-gap:5px; }
    .mvip-fx-key { font-size:11px; }
  }
</style>

<script id="mvip-fx500ms-calculator-script-20260829">
(() => {
  'use strict';
  if (document.getElementById('mvipCalculatorPanel')) return;

  const CALCULATOR_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><rect x="4" y="2.5" width="16" height="19" rx="2.5" stroke="currentColor" stroke-width="2"/><rect x="7" y="5.5" width="10" height="4" rx="1" stroke="currentColor" stroke-width="1.6"/><path d="M8 13h2M14 13h2M8 17h2M14 17h2" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>';
  const DEFAULT_HINT = 'SHIFT dùng chức năng vàng · ALPHA dùng chức năng đỏ · Esc để đóng';
  const MAX_EXPRESSION_LENGTH = 96;

  function keyHtml(key,main,shiftKey,shiftLabel,alphaKey,alphaLabel,className,ariaLabel) {
    return '<button class="mvip-fx-key ' + (className || '') + '" type="button" data-fx-key="' + key + '"'
      + (shiftKey ? ' data-shift-key="' + shiftKey + '"' : '')
      + (alphaKey ? ' data-alpha-key="' + alphaKey + '"' : '')
      + ' aria-label="' + (ariaLabel || String(main).replace(/<[^>]*>/g,'')) + '">'
      + (shiftLabel ? '<span class="mvip-fx-key-alt">' + shiftLabel + '</span>' : '')
      + (alphaLabel ? '<span class="mvip-fx-key-alpha">' + alphaLabel + '</span>' : '')
      + '<span class="mvip-fx-key-main">' + main + '</span></button>';
  }

  const scienceKeys = [
    ['square','x<sup>2</sup>','cube','x³','','','','Bình phương'],
    ['power','x<sup>y</sup>','reciprocal','x⁻¹','','','','Lũy thừa'],
    ['log','log','pow10','10ˣ','','','','Logarit cơ số 10'],
    ['ln','ln','exp','eˣ','','','','Logarit tự nhiên'],
    ['negative','(−)','','','ans','Ans','','Dấu âm'],
    ['sin','sin','asin','sin⁻¹','','','','Sin'],
    ['cos','cos','acos','cos⁻¹','','','','Cos'],
    ['tan','tan','atan','tan⁻¹','','','','Tan'],
    ['recall','RCL','store','STO','memory','M','','Gọi bộ nhớ'],
    ['memoryPlus','M+','memoryMinus','M−','','','','Cộng vào bộ nhớ'],
    ['fraction','a b/c','fractionToggle','d/c','','','','Phân số'],
    ['sqrt','√','cbrt','³√','','','','Căn bậc hai'],
    ['leftParen','(','percent','%','','','','Mở ngoặc'],
    ['rightParen',')','factorial','x!','','','','Đóng ngoặc'],
    ['expInput','EXP','pi','π','e','e','','Số mũ thập phân']
  ].map((item) => keyHtml(...item)).join('');

  const numberKeys = [
    ['7','7','','','','','','Số 7'],
    ['8','8','','','','','','Số 8'],
    ['9','9','','','','','','Số 9'],
    ['delete','DEL','','','','','is-danger','Xóa lùi'],
    ['clear','AC','memoryClear','Mcl','','','is-danger','Xóa phép tính'],
    ['4','4','','','','','','Số 4'],
    ['5','5','','','','','','Số 5'],
    ['6','6','','','','','','Số 6'],
    ['multiply','×','','','','','is-operation','Nhân'],
    ['divide','÷','','','','','is-operation','Chia'],
    ['1','1','','','','','','Số 1'],
    ['2','2','','','','','','Số 2'],
    ['3','3','','','','','','Số 3'],
    ['add','+','','','','','is-operation','Cộng'],
    ['subtract','−','','','','','is-operation','Trừ'],
    ['0','0','','','','','','Số 0'],
    ['decimal','.','','','','','','Dấu thập phân'],
    ['ans','Ans','','','','','','Kết quả trước'],
    ['equals','=','','','','','is-equals','Bằng']
  ].map((item) => keyHtml(...item)).join('');

  const panel = document.createElement('section');
  panel.id = 'mvipCalculatorPanel';
  panel.hidden = true;
  panel.setAttribute('role','dialog');
  panel.setAttribute('aria-modal','false');
  panel.setAttribute('aria-label','Máy tính khoa học fx-500MS');
  panel.innerHTML = [
    '<header class="mvip-calculator-head" id="mvipCalculatorDragHandle">',
      '<div class="mvip-calculator-title">',CALCULATOR_ICON,'<span>Máy tính khoa học</span><small>fx-500MS</small></div>',
      '<button class="mvip-calculator-close" id="mvipCalculatorCloseBtn" type="button" title="Đóng máy tính" aria-label="Đóng máy tính">×</button>',
    '</header>',
    '<div class="mvip-fx-shell">',
      '<div class="mvip-fx-brand-row"><div class="mvip-fx-brand">CASIO</div><div class="mvip-fx-model">fx-<strong>500</strong>MS</div></div>',
      '<div class="mvip-fx-subbrand"><div class="mvip-fx-solar" aria-hidden="true"><i></i><i></i><i></i><i></i></div><span>S-V.P.A.M. · 2-Line Display</span></div>',
      '<div class="mvip-fx-lcd-frame"><div class="mvip-fx-lcd">',
        '<div class="mvip-fx-lcd-status"><span class="mvip-fx-indicator" id="mvipFxShiftIndicator">S</span><span class="mvip-fx-indicator" id="mvipFxAlphaIndicator">A</span><span class="mvip-fx-indicator" id="mvipFxMemoryIndicator">M</span><span class="mvip-fx-angle" id="mvipFxAngleIndicator">DEG</span></div>',
        '<div class="mvip-fx-lcd-expression" id="mvipFxExpression"></div>',
        '<div class="mvip-fx-lcd-result" id="mvipFxResult">0</div>',
      '</div></div>',
      '<div class="mvip-fx-control-row">',
        '<button class="mvip-fx-control-key is-shift" type="button" data-fx-key="shift">SHIFT</button>',
        '<button class="mvip-fx-control-key is-alpha" type="button" data-fx-key="alpha">ALPHA</button>',
        '<button class="mvip-fx-control-key" type="button" data-fx-key="mode">MODE</button>',
        '<button class="mvip-fx-control-key" type="button" data-fx-key="clear">ON</button>',
      '</div>',
      '<div class="mvip-fx-replay-row">',
        '<button class="mvip-fx-replay-side" type="button" data-fx-key="cursorLeft" aria-label="Di chuyển sang trái">◀</button>',
        '<div class="mvip-fx-replay-pad">',
          '<button class="is-up" type="button" data-fx-key="historyUp" aria-label="Phép tính trước">▲</button>',
          '<button class="is-down" type="button" data-fx-key="historyDown" aria-label="Phép tính sau">▼</button>',
        '</div>',
        '<button class="mvip-fx-replay-side" type="button" data-fx-key="cursorRight" aria-label="Di chuyển sang phải">▶</button>',
      '</div>',
      '<div class="mvip-fx-key-grid mvip-fx-science-grid">',scienceKeys,'</div>',
      '<div class="mvip-fx-key-grid mvip-fx-number-grid">',numberKeys,'</div>',
      '<div class="mvip-fx-hint" id="mvipFxHint">',DEFAULT_HINT,'</div>',
    '</div>'
  ].join('');
  document.body.appendChild(panel);

  const expressionDisplay = panel.querySelector('#mvipFxExpression');
  const resultDisplay = panel.querySelector('#mvipFxResult');
  const shiftIndicator = panel.querySelector('#mvipFxShiftIndicator');
  const alphaIndicator = panel.querySelector('#mvipFxAlphaIndicator');
  const memoryIndicator = panel.querySelector('#mvipFxMemoryIndicator');
  const angleIndicator = panel.querySelector('#mvipFxAngleIndicator');
  const hint = panel.querySelector('#mvipFxHint');
  const closeBtn = panel.querySelector('#mvipCalculatorCloseBtn');
  const dragHandle = panel.querySelector('#mvipCalculatorDragHandle');
  if (!(expressionDisplay instanceof HTMLElement)
      || !(resultDisplay instanceof HTMLElement)
      || !(shiftIndicator instanceof HTMLElement)
      || !(alphaIndicator instanceof HTMLElement)
      || !(memoryIndicator instanceof HTMLElement)
      || !(angleIndicator instanceof HTMLElement)
      || !(hint instanceof HTMLElement)
      || !(closeBtn instanceof HTMLButtonElement)
      || !(dragHandle instanceof HTMLElement)) return;

  let input = '';
  let cursor = 0;
  let completedExpression = '';
  let resultText = '0';
  let lastAnswer = 0;
  let memoryValue = 0;
  let memorySet = false;
  let angleMode = 'DEG';
  let shiftActive = false;
  let alphaActive = false;
  let errorState = false;
  let justEvaluated = false;
  let fractionShown = false;
  let history = [];
  let historyIndex = 0;
  let lastTrigger = null;
  let drag = null;
  let hintTimer = 0;

  function escapePretty(source) {
    return String(source == null ? '' : source)
      .replace(/asin\(/g,'sin⁻¹(')
      .replace(/acos\(/g,'cos⁻¹(')
      .replace(/atan\(/g,'tan⁻¹(')
      .replace(/pow10\(/g,'10^(')
      .replace(/cbrt\(/g,'∛(')
      .replace(/sqrt\(/g,'√(')
      .replace(/pi/g,'π')
      .replace(/\^\(-1\)/g,'⁻¹')
      .replace(/\^3/g,'³')
      .replace(/\^2/g,'²')
      .replace(/(\d(?:\.\d+)?)E([+\-]?\d+)/gi,'$1×10^$2')
      .replace(/\*/g,'×')
      .replace(/\//g,'÷')
      .replace(/-/g,'−');
  }

  function numberString(value) {
    if (!Number.isFinite(value)) return '';
    if (Object.is(value,-0) || Math.abs(value) < 1e-14) return '0';
    const absolute = Math.abs(value);
    if (absolute >= 1e12 || absolute < 1e-10) {
      return value.toExponential(10).replace(/\.0+e/i,'E').replace(/(\.\d*?[1-9])0+e/i,'$1E').replace(/e/i,'E');
    }
    return String(Number(value.toPrecision(12)));
  }

  function fitLcdText(element,text,large) {
    const length = Array.from(String(text || '')).length;
    let size = large ? 25 : 16;
    if (large && length > 14) size = 20;
    if (large && length > 19) size = 16;
    if (large && length > 25) size = 13;
    if (!large && length > 28) size = 13;
    if (!large && length > 38) size = 11;
    element.style.fontSize = size + 'px';
  }

  function showHint(message,temporary) {
    window.clearTimeout(hintTimer);
    hint.textContent = message || DEFAULT_HINT;
    hint.title = hint.textContent;
    if (temporary) {
      hintTimer = window.setTimeout(() => {
        hint.textContent = DEFAULT_HINT;
        hint.title = DEFAULT_HINT;
      },1800);
    }
  }

  function updateDisplay() {
    let expressionText = '';
    if (justEvaluated || errorState) {
      expressionText = escapePretty(completedExpression || input) + (justEvaluated ? '=' : '');
    } else if (input) {
      expressionText = escapePretty(input.slice(0,cursor)) + '▏' + escapePretty(input.slice(cursor));
    }
    expressionDisplay.textContent = expressionText;
    expressionDisplay.title = escapePretty(completedExpression || input);
    resultDisplay.textContent = errorState ? (resultText || 'Math ERROR') : (resultText || (input ? '' : '0'));
    resultDisplay.title = resultDisplay.textContent;
    shiftIndicator.classList.toggle('is-on',shiftActive);
    alphaIndicator.classList.toggle('is-on',alphaActive);
    memoryIndicator.classList.toggle('is-on',memorySet);
    angleIndicator.textContent = angleMode;
    panel.classList.toggle('is-error',errorState);
    const shiftButton = panel.querySelector('[data-fx-key="shift"]');
    const alphaButton = panel.querySelector('[data-fx-key="alpha"]');
    if (shiftButton instanceof HTMLElement) shiftButton.classList.toggle('is-active',shiftActive);
    if (alphaButton instanceof HTMLElement) alphaButton.classList.toggle('is-active',alphaActive);
    fitLcdText(expressionDisplay,expressionText,false);
    fitLcdText(resultDisplay,resultDisplay.textContent,true);
  }

  function clearModifiers() {
    shiftActive = false;
    alphaActive = false;
  }

  function clearError() {
    if (!errorState) return;
    errorState = false;
    resultText = '';
    completedExpression = '';
  }

  function clearCalculator() {
    input = '';
    cursor = 0;
    completedExpression = '';
    resultText = '0';
    errorState = false;
    justEvaluated = false;
    fractionShown = false;
    clearModifiers();
    historyIndex = history.length;
    showHint(DEFAULT_HINT,false);
    updateDisplay();
  }

  function resetForNewValue() {
    clearError();
    if (!justEvaluated) return;
    input = '';
    cursor = 0;
    completedExpression = '';
    resultText = '';
    justEvaluated = false;
    fractionShown = false;
  }

  function continueAfterResult() {
    clearError();
    if (!justEvaluated) return;
    completedExpression = '';
    resultText = '';
    justEvaluated = false;
    fractionShown = false;
    cursor = input.length;
  }

  function canInsert(token) {
    if (input.length + String(token || '').length <= MAX_EXPRESSION_LENGTH) return true;
    showHint('Phép tính đã đạt độ dài tối đa',true);
    return false;
  }

  function insertAtCursor(token) {
    const text = String(token || '');
    if (!text || !canInsert(text)) return false;
    input = input.slice(0,cursor) + text + input.slice(cursor);
    cursor += text.length;
    resultText = '';
    completedExpression = '';
    updateDisplay();
    return true;
  }

  function isValueEndAt(position) {
    const left = input.slice(0,position);
    return /[\d).!%]$/.test(left) || /(?:pi|Ans|M|e)$/.test(left);
  }

  function insertDigit(digit) {
    resetForNewValue();
    const left = input.slice(0,cursor);
    const prefix = isValueEndAt(cursor) && (/[)!%]$/.test(left) || /(?:pi|Ans|M|e)$/.test(left)) ? '*' : '';
    insertAtCursor(prefix + digit);
  }

  function currentNumberLeft() {
    return input.slice(0,cursor).match(/(?:^|[^\d.E])((?:\d+(?:\.\d*)?|\.\d+)(?:E[+\-]?\d*)?)$/i);
  }

  function insertDecimal() {
    resetForNewValue();
    const match = currentNumberLeft();
    if (match && String(match[1]).split(/E/i)[0].includes('.')) return;
    if (match && /E/i.test(String(match[1]))) return;
    if (!match) insertAtCursor('0.');
    else insertAtCursor('.');
  }

  function insertConstant(token) {
    resetForNewValue();
    const prefix = isValueEndAt(cursor) ? '*' : '';
    const next = input.charAt(cursor);
    const suffix = next && /[\d.(A-Za-z]/.test(next) ? '*' : '';
    insertAtCursor(prefix + token + suffix);
    if (suffix) cursor -= 1;
  }

  function insertFunction(name) {
    resetForNewValue();
    const prefix = isValueEndAt(cursor) ? '*' : '';
    insertAtCursor(prefix + name + '(');
  }

  function insertLeftParenthesis() {
    resetForNewValue();
    insertAtCursor((isValueEndAt(cursor) ? '*' : '') + '(');
  }

  function insertRightParenthesis() {
    clearError();
    if (justEvaluated) return;
    const before = input.slice(0,cursor);
    const open = (before.match(/\(/g) || []).length;
    const close = (before.match(/\)/g) || []).length;
    if (open <= close || !isValueEndAt(cursor)) return;
    insertAtCursor(')');
  }

  function insertOperator(operator) {
    continueAfterResult();
    if (!input) {
      if (operator === '-') insertAtCursor('-');
      return;
    }
    const before = input.charAt(cursor - 1);
    if (before === '.') insertAtCursor('0');
    const last = input.charAt(cursor - 1);
    if (/[+\-*/^]/.test(last)) {
      if (operator === '-' && ['*','/','^','('].includes(last)) insertAtCursor('-');
      else {
        input = input.slice(0,cursor - 1) + operator + input.slice(cursor);
        completedExpression = '';
        resultText = '';
        updateDisplay();
      }
      return;
    }
    if (last === '(') {
      if (operator === '-') insertAtCursor('-');
      return;
    }
    if (isValueEndAt(cursor)) insertAtCursor(operator);
  }

  function insertPower(power) {
    continueAfterResult();
    if (!isValueEndAt(cursor)) return;
    insertAtCursor(power);
  }

  function insertPostfix(token) {
    continueAfterResult();
    if (!isValueEndAt(cursor)) return;
    insertAtCursor(token);
  }

  function insertExponentMarker() {
    resetForNewValue();
    const match = currentNumberLeft();
    if (!match || /E/i.test(String(match[1]))) {
      showHint('EXP phải đứng sau một số',true);
      return;
    }
    insertAtCursor('E');
  }

  function deleteBackward() {
    clearError();
    if (justEvaluated) {
      input = '';
      cursor = 0;
      completedExpression = '';
      resultText = '0';
      justEvaluated = false;
      updateDisplay();
      return;
    }
    if (cursor <= 0) return;
    const left = input.slice(0,cursor);
    const tokens = ['pow10(','sqrt(','cbrt(','asin(','acos(','atan(','sin(','cos(','tan(','log(','ln(','Ans','pi','^(-1)'];
    const token = tokens.find((candidate) => left.endsWith(candidate));
    const count = token ? token.length : 1;
    input = input.slice(0,cursor - count) + input.slice(cursor);
    cursor -= count;
    resultText = '';
    completedExpression = '';
    updateDisplay();
  }

  function toRadians(value) {
    if (angleMode === 'RAD') return value;
    if (angleMode === 'GRAD') return value * Math.PI / 200;
    return value * Math.PI / 180;
  }

  function fromRadians(value) {
    if (angleMode === 'RAD') return value;
    if (angleMode === 'GRAD') return value * 200 / Math.PI;
    return value * 180 / Math.PI;
  }

  function factorial(value) {
    if (!Number.isInteger(value) || value < 0 || value > 170) throw new Error('Math ERROR');
    let result = 1;
    for (let index = 2; index <= value; index += 1) result *= index;
    return result;
  }

  function evaluateExpression(source) {
    const expression = String(source || '').replace(/\s+/g,'');
    let index = 0;

    function fail(message) { throw new Error(message || 'Syntax ERROR'); }
    function ensureFinite(value) {
      if (!Number.isFinite(value) || Number.isNaN(value)) fail('Math ERROR');
      return value;
    }
    function parseExpressionValue() {
      let value = parseTerm();
      while (expression.charAt(index) === '+' || expression.charAt(index) === '-') {
        const operator = expression.charAt(index++);
        const right = parseTerm();
        value = ensureFinite(operator === '+' ? value + right : value - right);
      }
      return value;
    }
    function parseTerm() {
      let value = parseUnary();
      while (expression.charAt(index) === '*' || expression.charAt(index) === '/') {
        const operator = expression.charAt(index++);
        const right = parseUnary();
        if (operator === '/' && right === 0) fail('Math ERROR');
        value = ensureFinite(operator === '*' ? value * right : value / right);
      }
      return value;
    }
    function parseUnary() {
      if (expression.charAt(index) === '+') { index += 1; return parseUnary(); }
      if (expression.charAt(index) === '-') { index += 1; return -parseUnary(); }
      return parsePower();
    }
    function parsePower() {
      let value = parsePostfix();
      if (expression.charAt(index) === '^') {
        index += 1;
        value = ensureFinite(Math.pow(value,parseUnary()));
      }
      return value;
    }
    function parsePostfix() {
      let value = parsePrimary();
      while (expression.charAt(index) === '!' || expression.charAt(index) === '%') {
        const operator = expression.charAt(index++);
        value = operator === '!' ? factorial(value) : value / 100;
      }
      return ensureFinite(value);
    }
    function applyFunction(name,value) {
      if (name === 'sqrt') {
        if (value < 0) fail('Math ERROR');
        return Math.sqrt(value);
      }
      if (name === 'cbrt') return Math.cbrt ? Math.cbrt(value) : Math.sign(value) * Math.pow(Math.abs(value),1 / 3);
      if (name === 'sin') return Math.sin(toRadians(value));
      if (name === 'cos') return Math.cos(toRadians(value));
      if (name === 'tan') {
        const radians = toRadians(value);
        if (Math.abs(Math.cos(radians)) < 1e-14) fail('Math ERROR');
        return Math.tan(radians);
      }
      if (name === 'asin') {
        if (value < -1 || value > 1) fail('Math ERROR');
        return fromRadians(Math.asin(value));
      }
      if (name === 'acos') {
        if (value < -1 || value > 1) fail('Math ERROR');
        return fromRadians(Math.acos(value));
      }
      if (name === 'atan') return fromRadians(Math.atan(value));
      if (name === 'log') {
        if (value <= 0) fail('Math ERROR');
        return Math.log10 ? Math.log10(value) : Math.log(value) / Math.LN10;
      }
      if (name === 'ln') {
        if (value <= 0) fail('Math ERROR');
        return Math.log(value);
      }
      if (name === 'pow10') return Math.pow(10,value);
      if (name === 'exp') return Math.exp(value);
      fail('Syntax ERROR');
    }
    function parsePrimary() {
      if (expression.charAt(index) === '(') {
        index += 1;
        const value = parseExpressionValue();
        if (expression.charAt(index) !== ')') fail('Syntax ERROR');
        index += 1;
        return value;
      }
      const numberMatch = expression.slice(index).match(/^(?:\d+(?:\.\d*)?|\.\d+)(?:E[+\-]?\d+)?/i);
      if (numberMatch) {
        index += numberMatch[0].length;
        return Number(numberMatch[0]);
      }
      const identifierMatch = expression.slice(index).match(/^[A-Za-z][A-Za-z0-9]*/);
      if (!identifierMatch) fail('Syntax ERROR');
      const name = identifierMatch[0];
      index += name.length;
      if (name === 'pi') return Math.PI;
      if (name === 'e') return Math.E;
      if (name === 'Ans') return lastAnswer;
      if (name === 'M') return memoryValue;
      if (expression.charAt(index) !== '(') fail('Syntax ERROR');
      index += 1;
      const argument = parseExpressionValue();
      if (expression.charAt(index) !== ')') fail('Syntax ERROR');
      index += 1;
      return ensureFinite(applyFunction(name,argument));
    }

    if (!expression) fail('Syntax ERROR');
    const result = parseExpressionValue();
    if (index !== expression.length) fail('Syntax ERROR');
    return ensureFinite(result);
  }

  function balancedExpression(source) {
    let depth = 0;
    for (const character of String(source || '')) {
      if (character === '(') depth += 1;
      else if (character === ')') {
        depth -= 1;
        if (depth < 0) throw new Error('Syntax ERROR');
      }
    }
    return String(source || '') + ')'.repeat(depth);
  }

  function showError(message,source) {
    completedExpression = source || input;
    resultText = message || 'Math ERROR';
    errorState = true;
    justEvaluated = false;
    clearModifiers();
    showHint('DEL để sửa hoặc AC để xóa phép tính',false);
    updateDisplay();
  }

  function equals() {
    clearError();
    if (!input) return;
    try {
      const source = balancedExpression(input);
      const value = evaluateExpression(source);
      const text = numberString(value);
      if (!text) throw new Error('Math ERROR');
      completedExpression = source;
      input = text;
      cursor = input.length;
      resultText = escapePretty(text);
      lastAnswer = value;
      errorState = false;
      justEvaluated = true;
      fractionShown = false;
      if (!history.length || history[history.length - 1].source !== source) {
        history.push({source:source,value:value});
        if (history.length > 40) history.shift();
      }
      historyIndex = history.length;
      clearModifiers();
      showHint('Kết quả đã lưu vào Ans',true);
      updateDisplay();
    } catch (error) {
      showError(error && error.message ? error.message : 'Math ERROR',input);
    }
  }

  function approximateFraction(value) {
    if (!Number.isFinite(value)) return '';
    const sign = value < 0 ? '−' : '';
    const target = Math.abs(value);
    if (Number.isInteger(target)) return sign + String(target);
    const wholePart = Math.floor(target);
    const fractionalPart = target - wholePart;
    let lowerN = 0;
    let lowerD = 1;
    let upperN = 1;
    let upperD = 0;
    let numerator = 0;
    let denominator = 1;
    for (let count = 0; count < 64; count += 1) {
      numerator = lowerN + upperN;
      denominator = lowerD + upperD;
      if (denominator > 9999) break;
      const mediant = numerator / denominator;
      if (Math.abs(mediant - fractionalPart) < 1e-11) break;
      if (mediant < fractionalPart) { lowerN = numerator; lowerD = denominator; }
      else { upperN = numerator; upperD = denominator; }
    }
    if (denominator > 9999) {
      numerator = Math.round(fractionalPart * 9999);
      denominator = 9999;
    }
    const common = (a,b) => b ? common(b,a % b) : a;
    const divisor = common(numerator,denominator) || 1;
    numerator /= divisor;
    denominator /= divisor;
    const carry = Math.floor(numerator / denominator);
    const whole = wholePart + carry;
    const remainder = numerator % denominator;
    if (!remainder) return sign + String(whole);
    return sign + (whole ? whole + ' ' : '') + remainder + '/' + denominator;
  }

  function toggleFraction() {
    if (!justEvaluated || !Number.isFinite(lastAnswer)) {
      showHint('Bấm = trước khi đổi dạng phân số',true);
      return;
    }
    fractionShown = !fractionShown;
    resultText = fractionShown ? approximateFraction(lastAnswer) : escapePretty(numberString(lastAnswer));
    showHint(fractionShown ? 'Đang hiển thị dạng phân số' : 'Đang hiển thị dạng thập phân',true);
    clearModifiers();
    updateDisplay();
  }

  function currentValue() {
    if (justEvaluated) return lastAnswer;
    if (!input) return lastAnswer;
    return evaluateExpression(balancedExpression(input));
  }

  function storeMemory() {
    try {
      memoryValue = currentValue();
      memorySet = true;
      showHint('Đã lưu M = ' + escapePretty(numberString(memoryValue)),true);
    } catch (_) { showError('Math ERROR',input); return; }
    clearModifiers();
    updateDisplay();
  }

  function changeMemory(direction) {
    try {
      memoryValue += direction * currentValue();
      memorySet = true;
      showHint('M = ' + escapePretty(numberString(memoryValue)),true);
    } catch (_) { showError('Math ERROR',input); return; }
    clearModifiers();
    updateDisplay();
  }

  function clearMemory() {
    memoryValue = 0;
    memorySet = false;
    clearModifiers();
    showHint('Đã xóa bộ nhớ M',true);
    updateDisplay();
  }

  function cycleMode() {
    const modes = ['DEG','RAD','GRAD'];
    angleMode = modes[(modes.indexOf(angleMode) + 1) % modes.length];
    clearModifiers();
    showHint('Đơn vị góc: ' + angleMode,true);
    updateDisplay();
  }

  function loadHistory(direction) {
    if (!history.length) { showHint('Chưa có lịch sử phép tính',true); return; }
    historyIndex = Math.max(0,Math.min(history.length,historyIndex + direction));
    if (historyIndex === history.length) {
      input = '';
      resultText = '0';
    } else {
      const entry = history[historyIndex];
      input = entry.source;
      resultText = escapePretty(numberString(entry.value));
    }
    cursor = input.length;
    completedExpression = '';
    errorState = false;
    justEvaluated = false;
    fractionShown = false;
    updateDisplay();
  }

  function moveCursor(direction) {
    if (justEvaluated || errorState) return;
    cursor = Math.max(0,Math.min(input.length,cursor + direction));
    updateDisplay();
  }

  function dispatchKey(key) {
    if (/^\d$/.test(key)) insertDigit(key);
    else if (key === 'decimal') insertDecimal();
    else if (key === 'add') insertOperator('+');
    else if (key === 'subtract') insertOperator('-');
    else if (key === 'multiply') insertOperator('*');
    else if (key === 'divide' || key === 'fraction') insertOperator('/');
    else if (key === 'power') insertOperator('^');
    else if (key === 'negative') { resetForNewValue(); insertAtCursor('-'); }
    else if (key === 'leftParen') insertLeftParenthesis();
    else if (key === 'rightParen') insertRightParenthesis();
    else if (key === 'sqrt') insertFunction('sqrt');
    else if (key === 'cbrt') insertFunction('cbrt');
    else if (key === 'sin') insertFunction('sin');
    else if (key === 'cos') insertFunction('cos');
    else if (key === 'tan') insertFunction('tan');
    else if (key === 'asin') insertFunction('asin');
    else if (key === 'acos') insertFunction('acos');
    else if (key === 'atan') insertFunction('atan');
    else if (key === 'log') insertFunction('log');
    else if (key === 'ln') insertFunction('ln');
    else if (key === 'pow10') insertFunction('pow10');
    else if (key === 'exp') insertFunction('exp');
    else if (key === 'square') insertPower('^2');
    else if (key === 'cube') insertPower('^3');
    else if (key === 'reciprocal') insertPower('^(-1)');
    else if (key === 'factorial') insertPostfix('!');
    else if (key === 'percent') insertPostfix('%');
    else if (key === 'expInput') insertExponentMarker();
    else if (key === 'pi') insertConstant('pi');
    else if (key === 'e') insertConstant('e');
    else if (key === 'ans') insertConstant('Ans');
    else if (key === 'memory' || key === 'recall') insertConstant('M');
    else if (key === 'store') storeMemory();
    else if (key === 'memoryPlus') changeMemory(1);
    else if (key === 'memoryMinus') changeMemory(-1);
    else if (key === 'memoryClear') clearMemory();
    else if (key === 'fractionToggle') toggleFraction();
    else if (key === 'delete') deleteBackward();
    else if (key === 'clear') clearCalculator();
    else if (key === 'equals') equals();
    else if (key === 'mode') cycleMode();
    else if (key === 'historyUp') loadHistory(-1);
    else if (key === 'historyDown') loadHistory(1);
    else if (key === 'cursorLeft') moveCursor(-1);
    else if (key === 'cursorRight') moveCursor(1);
  }

  function handleButton(button) {
    const primary = String(button.getAttribute('data-fx-key') || '');
    if (primary === 'shift') {
      shiftActive = !shiftActive;
      if (shiftActive) alphaActive = false;
      updateDisplay();
      return;
    }
    if (primary === 'alpha') {
      alphaActive = !alphaActive;
      if (alphaActive) shiftActive = false;
      updateDisplay();
      return;
    }
    let key = primary;
    if (shiftActive && button.getAttribute('data-shift-key')) key = String(button.getAttribute('data-shift-key'));
    else if (alphaActive && button.getAttribute('data-alpha-key')) key = String(button.getAttribute('data-alpha-key'));
    if (key !== 'fractionToggle') clearModifiers();
    dispatchKey(key);
    updateDisplay();
  }

  function fullscreenElement() {
    return document.fullscreenElement || document.webkitFullscreenElement || null;
  }

  function mountForCurrentFullscreen() {
    const fullscreen = fullscreenElement();
    const host = fullscreen instanceof HTMLElement ? fullscreen : document.body;
    if (panel.parentElement !== host) host.appendChild(panel);
  }

  function syncOpenButtons() {
    document.querySelectorAll('[data-mvip-calculator-open="1"]').forEach((button) => {
      if (button instanceof HTMLElement) button.setAttribute('aria-pressed',panel.hidden ? 'false' : 'true');
    });
  }

  function clampPanel() {
    if (panel.hidden) return;
    const rect = panel.getBoundingClientRect();
    const left = Math.max(4,Math.min(rect.left,Math.max(4,window.innerWidth - rect.width - 4)));
    const top = Math.max(0,Math.min(rect.top,Math.max(0,window.innerHeight - Math.min(rect.height,window.innerHeight))));
    panel.style.left = left + 'px';
    panel.style.top = top + 'px';
    panel.style.right = 'auto';
  }

  function fitPanelToScreen(anchorRight) {
    if (panel.hidden) return;
    /* Đo ở kích thước thiết kế gốc, sau đó phóng đồng đều cả thân máy,
       màn hình và bàn phím. Trên màn hình đủ rộng, chiều cao hiển thị luôn
       bằng đúng chiều cao khung nhìn. */
    panel.style.transform = 'none';
    const baseWidth = Math.max(1,panel.offsetWidth);
    const baseHeight = Math.max(1,panel.offsetHeight);
    const availableWidth = Math.max(1,window.innerWidth - 8);
    const availableHeight = Math.max(1,window.innerHeight);
    const scale = Math.max(.25,Math.min(availableHeight / baseHeight,availableWidth / baseWidth));
    panel.style.transform = 'scale(' + scale + ')';

    const visualWidth = baseWidth * scale;
    const visualHeight = baseHeight * scale;
    if (anchorRight || !panel.style.left) {
      panel.style.left = Math.max(4,window.innerWidth - visualWidth - 4) + 'px';
      panel.style.top = Math.max(0,(window.innerHeight - visualHeight) / 2) + 'px';
      panel.style.right = 'auto';
    } else {
      clampPanel();
    }
  }

  function openCalculator(trigger) {
    lastTrigger = trigger instanceof HTMLElement ? trigger : lastTrigger;
    mountForCurrentFullscreen();
    panel.hidden = false;
    syncOpenButtons();
    requestAnimationFrame(() => {
      fitPanelToScreen(true);
      const first = panel.querySelector('[data-fx-key="shift"]');
      if (first instanceof HTMLElement) {
        try { first.focus({preventScroll:true}); } catch (_) { try { first.focus(); } catch (_) {} }
      }
    });
  }

  function closeCalculator() {
    panel.hidden = true;
    panel.classList.remove('is-dragging');
    drag = null;
    syncOpenButtons();
    if (panel.parentElement !== document.body) document.body.appendChild(panel);
    if (lastTrigger instanceof HTMLElement && lastTrigger.isConnected) {
      try { lastTrigger.focus({preventScroll:true}); } catch (_) {}
    }
  }

  function installButton(dockId,buttonId,className,beforeSelector) {
    const dock = document.getElementById(dockId);
    if (!(dock instanceof HTMLElement)) return false;
    if (document.getElementById(buttonId)) return true;
    const button = document.createElement('button');
    button.type = 'button';
    button.id = buttonId;
    button.className = className + ' mvip-calculator-open-btn';
    button.setAttribute('data-mvip-calculator-open','1');
    button.setAttribute('aria-label','Mở máy tính khoa học fx-500MS');
    button.setAttribute('aria-pressed','false');
    button.title = 'Máy tính khoa học fx-500MS: phân số, lũy thừa, lượng giác, logarit và bộ nhớ';
    button.innerHTML = CALCULATOR_ICON;
    button.addEventListener('pointerdown',(event) => event.stopPropagation());
    button.addEventListener('click',(event) => {
      event.preventDefault();
      event.stopPropagation();
      openCalculator(button);
    });
    const before = beforeSelector ? dock.querySelector(beforeSelector) : null;
    dock.insertBefore(button,before instanceof Node ? before : null);
    return true;
  }

  function installAllButtons() {
    const word = installButton('wordPresentationSideInkDock','wordPresentationCalculatorBtn','cv7991-side-ink-tool','.cv7991-side-ink-undo, .cv7991-side-ink-clear, .cv7991-side-ink-popover');
    const single = installButton('singleExamSideInkDock','singleExamCalculatorBtn','cv7991-side-ink-tool','.cv7991-side-ink-undo, .cv7991-side-ink-clear, .cv7991-side-ink-popover');
    const whiteboard = installButton('mvipWhiteboardToolDock','mvipWhiteboardCalculatorBtn','mvip-whiteboard-action-btn','#mvipWhiteboardUndoBtn');
    const zoom = installButton('wordImageZoomInkTools','wordImageZoomCalculatorBtn','word-image-zoom-ink-tool-btn','.word-image-zoom-ink-undo-btn, .word-image-zoom-ink-clear-btn, .word-image-zoom-ink-popover');
    return word && single && whiteboard && zoom;
  }

  panel.addEventListener('click',(event) => {
    const button = event.target instanceof Element ? event.target.closest('[data-fx-key]') : null;
    if (!(button instanceof HTMLButtonElement)) return;
    event.preventDefault();
    event.stopPropagation();
    handleButton(button);
  });
  panel.addEventListener('pointerdown',(event) => event.stopPropagation());
  closeBtn.addEventListener('click',(event) => {
    event.preventDefault();
    event.stopPropagation();
    closeCalculator();
  });

  dragHandle.addEventListener('pointerdown',(event) => {
    if (event.button !== 0 || (event.target instanceof Element && event.target.closest('button'))) return;
    const rect = panel.getBoundingClientRect();
    drag = {pointerId:event.pointerId,x:event.clientX,y:event.clientY,left:rect.left,top:rect.top};
    panel.classList.add('is-dragging');
    panel.style.left = rect.left + 'px';
    panel.style.top = rect.top + 'px';
    panel.style.right = 'auto';
    try { dragHandle.setPointerCapture(event.pointerId); } catch (_) {}
    event.preventDefault();
    event.stopPropagation();
  });
  dragHandle.addEventListener('pointermove',(event) => {
    if (!drag || event.pointerId !== drag.pointerId) return;
    const panelRect = panel.getBoundingClientRect();
    const maxLeft = Math.max(4,window.innerWidth - panelRect.width - 4);
    const maxTop = Math.max(0,window.innerHeight - Math.min(panelRect.height,window.innerHeight));
    panel.style.left = Math.max(4,Math.min(maxLeft,drag.left + event.clientX - drag.x)) + 'px';
    panel.style.top = Math.max(0,Math.min(maxTop,drag.top + event.clientY - drag.y)) + 'px';
    event.preventDefault();
    event.stopPropagation();
  });
  const finishDrag = (event) => {
    if (!drag || (event && event.pointerId !== drag.pointerId)) return;
    try { dragHandle.releasePointerCapture(drag.pointerId); } catch (_) {}
    drag = null;
    panel.classList.remove('is-dragging');
  };
  dragHandle.addEventListener('pointerup',finishDrag);
  dragHandle.addEventListener('pointercancel',finishDrag);
  dragHandle.addEventListener('lostpointercapture',finishDrag);

  document.addEventListener('keydown',(event) => {
    if (panel.hidden) return;
    if (event.key === 'Escape') {
      event.preventDefault();
      event.stopImmediatePropagation();
      closeCalculator();
      return;
    }
    const keyMap = {
      '+':'add','-':'subtract','*':'multiply','x':'multiply','X':'multiply','/':'divide',':':'divide',
      '^':'power','Enter':'equals','=':'equals','(':'leftParen',')':'rightParen','!':'factorial',
      '.':'decimal',',':'decimal','Backspace':'delete','Delete':'clear','ArrowLeft':'cursorLeft','ArrowRight':'cursorRight',
      'ArrowUp':'historyUp','ArrowDown':'historyDown','p':'pi','P':'pi','e':'e','E':'expInput',
      's':'sin','S':'sin','t':'tan','T':'tan','l':'log','L':'log','n':'ln','N':'ln','r':'sqrt','R':'sqrt','a':'ans','A':'ans'
    };
    const action = /^\d$/.test(event.key) ? event.key : keyMap[event.key];
    if (!action) return;
    event.preventDefault();
    event.stopImmediatePropagation();
    dispatchKey(action);
    updateDisplay();
  },true);

  document.addEventListener('fullscreenchange',() => {
    if (panel.hidden) return;
    mountForCurrentFullscreen();
    requestAnimationFrame(() => fitPanelToScreen(true));
  });
  document.addEventListener('webkitfullscreenchange',() => {
    if (panel.hidden) return;
    mountForCurrentFullscreen();
    requestAnimationFrame(() => fitPanelToScreen(true));
  });
  window.addEventListener('resize',() => requestAnimationFrame(() => fitPanelToScreen(false)));

  if (!installAllButtons()) {
    let attempts = 0;
    const timer = window.setInterval(() => {
      attempts += 1;
      if (installAllButtons() || attempts >= 30) window.clearInterval(timer);
    },200);
  }
  clearCalculator();
})();
</script>

<style id="mvip-word-ink-color-menu-visibility-fix-20260829">
  /* Thanh công cụ Word dùng overflow-x:auto để chứa nhiều nút. Theo quy tắc
     CSS, việc này cũng cắt phần menu nhô xuống dưới. Chỉ khi bảng màu/cỡ tẩy
     đang mở mới tạm cho toolbar tràn ra ngoài, nên thanh cuộn vẫn giữ nguyên
     trong mọi thời điểm còn lại. Dùng :has() để không phải đổi class của
     presenter (đổi class từng làm observer đóng menu ngay sau khi bấm). */
  #wordPresentationPresenter:has(#wordPresentationInkPalette:not([hidden]), #wordPresentationSideInkDock .cv7991-side-ink-popover:not([hidden])) .word-presentation-toolbar,
  #wordPresentationPresenter:has(#wordPresentationInkPalette:not([hidden]), #wordPresentationSideInkDock .cv7991-side-ink-popover:not([hidden])) .word-presentation-actions,
  #singleExamPresenter:has(#singleExamInkPalette:not([hidden]), #singleExamSideInkDock .cv7991-side-ink-popover:not([hidden])) .single-exam-toolbar,
  #singleExamPresenter:has(#singleExamInkPalette:not([hidden]), #singleExamSideInkDock .cv7991-side-ink-popover:not([hidden])) .single-exam-toolbar-actions {
    overflow:visible !important;
  }
  #wordPresentationPresenter .word-presentation-ink-palette:not([hidden]),
  #singleExamPresenter .word-presentation-ink-palette:not([hidden]),
  #wordPresentationPresenter .cv7991-side-ink-popover:not([hidden]),
  #singleExamPresenter .cv7991-side-ink-popover:not([hidden]) {
    display:grid !important;
    visibility:visible !important;
    pointer-events:auto !important;
    z-index:2147483000 !important;
  }
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  :is(#wordPresentationInkColorBtn, #wordPresentationSideInkDock .cv7991-side-ink-color-config),
  #singleExamPresenter
  :is(#singleExamInkColorBtn, #singleExamSideInkDock .cv7991-side-ink-color-config) {
    pointer-events:auto !important;
  }
</style>
<script id="mvip-word-ink-color-menu-visibility-fix-script-20260829">
(() => {
  'use strict';
  const configs = [
    {
      presenter:document.getElementById('wordPresentationPresenter'),
      controls:['#wordPresentationInkColorBtn','#wordPresentationSideInkDock .cv7991-side-ink-color-config']
    },
    {
      presenter:document.getElementById('singleExamPresenter'),
      controls:['#singleExamInkColorBtn','#singleExamSideInkDock .cv7991-side-ink-color-config']
    }
  ].filter((entry) => entry.presenter instanceof HTMLElement);
  let frame = 0;

  function restoreWordColorControls(entry) {
    if (entry.presenter.classList.contains('is-powerpoint-slide-mode')) return;
    entry.controls.forEach((selector) => {
      const button = entry.presenter.querySelector(selector);
      if (!(button instanceof HTMLButtonElement)) return;
      /* Trạng thái khóa của PowerPoint có thể còn sót lại sau khi đổi loại
         trình chiếu. Ở hai presenter Word, nút màu phải luôn bấm được. */
      button.disabled = false;
      button.classList.remove('is-pptx-media-locked','is-pptx-tool-unavailable');
      button.removeAttribute('aria-disabled');
    });
  }

  function sync() {
    frame = 0;
    configs.forEach(restoreWordColorControls);
  }

  function scheduleSync() {
    if (frame) return;
    frame = requestAnimationFrame(sync);
  }

  configs.forEach((entry) => {
    if (typeof MutationObserver !== 'function') return;
    const observer = new MutationObserver(scheduleSync);
    observer.observe(entry.presenter, {
      subtree:true,
      attributes:true,
      attributeFilter:['disabled','class']
    });
  });
  document.addEventListener('click', scheduleSync, true);
  document.addEventListener('pointerdown', scheduleSync, true);
  document.addEventListener('fullscreenchange', scheduleSync);
  document.addEventListener('webkitfullscreenchange', scheduleSync);
  scheduleSync();
})();
</script>

<script id="mvip-intro-check-entry-20260831">
(() => {
  'use strict';

  const openBtn = document.getElementById('introMvipCheckBtn');
  const modal = document.getElementById('introMvipCheckModal');
  const modalSelect = document.getElementById('introMvipClassSubjectSelect');
  const examProxyBtn = document.getElementById('introMvipExamCodeBtn');
  const questionProxyBtn = document.getElementById('introMvipQuestionBankBtn');
  const statusEl = document.getElementById('introMvipCheckStatus');
  const sourceSelect = document.getElementById('compactClassSubjectSelect');
  const examSourceBtn = document.getElementById('examModeEnterBtn');
  const questionSourceBtn = document.getElementById('regularTestStartBtn');
  const questionEditorModal = document.getElementById('regularTestQuestionModal');
  const questionNoBankModal = document.getElementById('regularTestNoBankModal');
  const examGuideModal = document.getElementById('introExamGuideModal');
  const homeSection = document.getElementById('gioi-thieu');
  let awaitingQuestionEditorFromIntro = false;

  if (!(openBtn instanceof HTMLButtonElement)
    || !(modal instanceof HTMLElement)
    || !(modalSelect instanceof HTMLSelectElement)
    || !(examProxyBtn instanceof HTMLButtonElement)
    || !(questionProxyBtn instanceof HTMLButtonElement)
    || !(sourceSelect instanceof HTMLSelectElement)
    || !(examSourceBtn instanceof HTMLButtonElement)
    || !(questionSourceBtn instanceof HTMLButtonElement)
    || !(examGuideModal instanceof HTMLElement)) return;

  function modalIsOpen() {
    return !modal.hidden;
  }

  function guideIsOpen() {
    return !examGuideModal.hidden;
  }

  function syncModalState() {
    const selected = String(sourceSelect.value || '');
    const accessMode = window.mvipLimitedAccess && typeof window.mvipLimitedAccess.accountMode === 'function'
      ? window.mvipLimitedAccess.accountMode()
      : '';
    const accessBlocked = accessMode === 'guest' || accessMode === 'limited';
    if (modalSelect.innerHTML !== sourceSelect.innerHTML) {
      modalSelect.innerHTML = sourceSelect.innerHTML || '<option value="">Chọn lớp - môn</option>';
    }
    modalSelect.value = selected;
    modalSelect.disabled = !!sourceSelect.disabled;
    /* Hai nút cao cấp luôn bấm được với khách/Limited để mở đúng bảng
       Đăng nhập/Nâng cấp; Full vẫn tuân theo dữ liệu lớp-môn hiện có. */
    examProxyBtn.disabled = accessBlocked ? false : (!!sourceSelect.disabled || !selected);
    questionProxyBtn.disabled = accessBlocked ? false : (!!questionSourceBtn.disabled || !selected);

    if (!statusEl) return;
    if (accessMode === 'guest') {
      statusEl.textContent = 'Bạn cần đăng nhập để chọn lớp - môn.';
    } else if (accessMode === 'limited') {
      statusEl.textContent = 'Bấm một chức năng để xem hướng dẫn nâng cấp MVIP.';
    } else if (!selected) {
      statusEl.textContent = 'Chọn lớp - môn trước khi bắt đầu kiểm tra.';
    } else if (examProxyBtn.disabled && questionProxyBtn.disabled) {
      statusEl.textContent = 'Lớp - môn này hiện chưa có mã đề hoặc ngân hàng câu hỏi phù hợp.';
    } else {
      statusEl.textContent = 'Chọn một hình thức kiểm tra để tiếp tục.';
    }
  }

  function openModal() {
    syncModalState();
    modal.hidden = false;
    modal.setAttribute('aria-hidden', 'false');
    document.body.classList.add('intro-mvip-check-open');
    requestAnimationFrame(() => {
      if (!modalSelect.disabled) modalSelect.focus({ preventScroll:true });
      else modal.querySelector('.intro-mvip-check-close')?.focus({ preventScroll:true });
    });
  }

  function markQuestionEditorReturnTarget() {
    if (!awaitingQuestionEditorFromIntro
      || !(questionEditorModal instanceof HTMLElement)
      || questionEditorModal.hidden) return;
    awaitingQuestionEditorFromIntro = false;
    document.documentElement.dataset.mvipReturnToIntroCheck = '1';
    // Chỉ bỏ lớp che của bảng chọn sau khi Soạn câu hỏi đã hiện trong DOM.
    // MutationObserver chạy trước lần vẽ kế tiếp nên không lộ trang phía sau.
    closeModal(false);
  }

  function returnToHome() {
    try {
      if (window.location.hash !== '#gioi-thieu') {
        window.history.replaceState(null, '', `${window.location.pathname}${window.location.search}#gioi-thieu`);
      }
    } catch (_) {
      try { window.location.hash = 'gioi-thieu'; } catch (_) {}
    }
    if (homeSection instanceof HTMLElement) {
      homeSection.scrollIntoView({ behavior:'auto', block:'start' });
    }
  }

  function closeModal(returnFocus = true, goHome = false) {
    modal.hidden = true;
    modal.setAttribute('aria-hidden', 'true');
    document.body.classList.remove('intro-mvip-check-open');
    if (goHome) returnToHome();
    if (returnFocus) {
      try { openBtn.focus({ preventScroll:true }); } catch (_) {}
    }
  }

  function openExamGuide() {
    closeModal(false);
    examGuideModal.hidden = false;
    examGuideModal.setAttribute('aria-hidden', 'false');
    document.body.classList.add('intro-mvip-check-open');
    requestAnimationFrame(() => {
      examGuideModal.querySelector('.intro-exam-guide-close')?.focus({ preventScroll:true });
    });
  }

  function closeExamGuide(returnFocus = true) {
    examGuideModal.hidden = true;
    examGuideModal.setAttribute('aria-hidden', 'true');
    openModal();
    if (returnFocus) requestAnimationFrame(() => {
      try { examProxyBtn.focus({ preventScroll:true }); } catch (_) {}
    });
  }

  function runSourceButton(sourceButton) {
    syncModalState();
    if (sourceButton.disabled) return;
    closeModal(false);
    sourceButton.click();
    setTimeout(() => {
      const target = document.querySelector('.workspace');
      if (target && !document.querySelector('.regular-test-modal:not([hidden])')) {
        target.scrollIntoView({ behavior:'smooth', block:'start' });
      }
    }, 80);
  }

  openBtn.addEventListener('click', openModal);
  modalSelect.addEventListener('change', () => {
    sourceSelect.value = modalSelect.value || '';
    sourceSelect.dispatchEvent(new Event('change', { bubbles:true }));
    syncModalState();
    setTimeout(syncModalState, 0);
    setTimeout(syncModalState, 160);
  });
  examProxyBtn.addEventListener('click', () => {
    syncModalState();
    if (window.mvipLimitedAccess && window.mvipLimitedAccess.guard('feature')) return;
    if (examProxyBtn.disabled) return;
    if (examSourceBtn.disabled) {
      openExamGuide();
      return;
    }
    runSourceButton(examSourceBtn);
  });
  questionProxyBtn.addEventListener('click', () => {
    syncModalState();
    if (window.mvipLimitedAccess && window.mvipLimitedAccess.guard('feature')) return;
    if (questionProxyBtn.disabled) return;
    awaitingQuestionEditorFromIntro = true;
    // Không đóng bảng chọn và không cuộn sang workspace trong thời gian tải.
    // Bảng này sẽ được đóng trong markQuestionEditorReturnTarget ngay trước
    // khi trình duyệt vẽ bảng Soạn câu hỏi.
    questionSourceBtn.click();
  });
  document.addEventListener('mvip:open-intro-check', openModal);
  window.mvipOpenIntroCheckModal = openModal;
  modal.addEventListener('click', (event) => {
    if (event.target instanceof Element && event.target.closest('[data-intro-mvip-close="1"]')) closeModal(true, true);
  });
  examGuideModal.addEventListener('click', (event) => {
    if (event.target instanceof Element && event.target.closest('[data-intro-exam-guide-close="1"]')) closeExamGuide();
  });
  document.addEventListener('keydown', (event) => {
    if (event.key === 'Escape' && guideIsOpen()) {
      event.preventDefault();
      closeExamGuide();
    } else if (event.key === 'Escape' && modalIsOpen()) {
      event.preventDefault();
      closeModal(true, true);
    }
  }, true);

  if (typeof MutationObserver === 'function') {
    const observer = new MutationObserver(() => {
      if (modalIsOpen()) syncModalState();
    });
    observer.observe(sourceSelect, { attributes:true, childList:true, subtree:true, attributeFilter:['disabled'] });
    observer.observe(examSourceBtn, { attributes:true, attributeFilter:['disabled'] });
    observer.observe(questionSourceBtn, { attributes:true, attributeFilter:['disabled'] });
    if (questionEditorModal instanceof HTMLElement) {
      const questionEditorObserver = new MutationObserver(markQuestionEditorReturnTarget);
      questionEditorObserver.observe(questionEditorModal, { attributes:true, attributeFilter:['hidden'] });
    }
    if (questionNoBankModal instanceof HTMLElement) {
      const noBankObserver = new MutationObserver(() => {
        if (awaitingQuestionEditorFromIntro && !questionNoBankModal.hidden) {
          awaitingQuestionEditorFromIntro = false;
          closeModal(false);
        }
      });
      noBankObserver.observe(questionNoBankModal, { attributes:true, attributeFilter:['hidden'] });
    }
  }
})();
</script>

<script id="mvip-intro-lesson-and-empty-classroom-20260901">
(() => {
  'use strict';

  const lessonItem = document.getElementById('introLessonPlanItem');
  const lessonProxyBtn = document.getElementById('introLessonPlanBtn');
  const lessonSourceBtn = document.getElementById('lessonPlanStartBtn');
  const compactClassSelect = document.getElementById('compactClassSubjectSelect');
  const mainClassSelect = document.getElementById('classSubjectSelect');
  const presentationClassSelect = document.getElementById('wordPresentationClassSelect');
  const singleExamClassSelect = document.getElementById('singleExamClassSelect');
  const classroom = document.getElementById('mvipNoClassClassroom');
  const studentBoard = document.getElementById('studentBoard');

  function syncLessonButton() {
    if (!(lessonItem instanceof HTMLElement)
      || !(lessonProxyBtn instanceof HTMLButtonElement)
      || !(lessonSourceBtn instanceof HTMLButtonElement)) return;
    const allowed = lessonSourceBtn.dataset.serverLessonAccess === 'true';
    lessonItem.hidden = !allowed;
    lessonProxyBtn.disabled = !allowed || lessonSourceBtn.disabled;
    lessonProxyBtn.title = lessonSourceBtn.title || 'Mở danh sách Bài giảng';
  }

  function selectedClassSubject() {
    /* state.currentMon là nguồn chuẩn vì mọi combo đều đồng bộ về đây trước
       khi dựng lại danh sách. Đọc thêm trực tiếp các combo để ảnh vẫn đổi đúng
       khi trang chưa khởi tạo xong state. */
    try {
      if (typeof state !== 'undefined') return String(state.currentMon || '').trim();
    } catch (_) {}
    const selects = [presentationClassSelect, singleExamClassSelect, compactClassSelect, mainClassSelect];
    for (const select of selects) {
      if (!(select instanceof HTMLSelectElement)) continue;
      const value = String(select.value || '').trim();
      if (value) return value;
    }
    return '';
  }

  function syncClassroomImage() {
    if (!(classroom instanceof HTMLElement) || !(studentBoard instanceof HTMLElement)) return;
    const show = !selectedClassSubject();
    classroom.hidden = !show;
    studentBoard.classList.toggle('has-mvip-empty-classroom', show);
  }

  if (lessonProxyBtn instanceof HTMLButtonElement && lessonSourceBtn instanceof HTMLButtonElement) {
    lessonProxyBtn.addEventListener('click', () => {
      if (window.mvipLimitedAccess && window.mvipLimitedAccess.guardLogin()) return;
      syncLessonButton();
      if (!lessonProxyBtn.disabled) lessonSourceBtn.click();
    });
  }

  const classroomClassSelects = [
    presentationClassSelect,
    singleExamClassSelect,
    compactClassSelect,
    mainClassSelect
  ];

  classroomClassSelects.forEach((select) => {
    if (!(select instanceof HTMLSelectElement)) return;
    select.addEventListener('change', () => {
      syncClassroomImage();
      setTimeout(syncClassroomImage, 0);
    });
  });

  if (typeof MutationObserver === 'function') {
    if (lessonSourceBtn instanceof HTMLButtonElement) {
      const lessonObserver = new MutationObserver(syncLessonButton);
      lessonObserver.observe(lessonSourceBtn, {
        attributes:true,
        attributeFilter:['hidden','disabled','data-server-lesson-access','title']
      });
    }
    classroomClassSelects.forEach((select) => {
      if (!(select instanceof HTMLSelectElement)) return;
      const classObserver = new MutationObserver(syncClassroomImage);
      classObserver.observe(select, { attributes:true, childList:true, subtree:true });
    });
  }

  window.addEventListener('focus', syncClassroomImage);
  syncLessonButton();
  syncClassroomImage();
})();
</script>

<script id="mvip-inline-word-presentation-sample-20260901">
(() => {
  'use strict';
  const choiceModal = document.getElementById('wordPresentationChoiceModal');
  const choiceBody = choiceModal && choiceModal.querySelector('.regular-choice-body');
  const localBtn = document.getElementById('wordPresentationChoiceLocalBtn');
  const sampleBtn = document.getElementById('wordPresentationSampleOpenBtn');
  const sampleModal = document.getElementById('wordPresentationSampleModal');
  const sampleBody = sampleModal && sampleModal.querySelector('.regular-sample-body');
  if (!(choiceBody instanceof HTMLElement)
    || !(localBtn instanceof HTMLButtonElement)
    || !(sampleBtn instanceof HTMLButtonElement)
    || !(sampleModal instanceof HTMLElement)
    || !(sampleBody instanceof HTMLElement)) return;

  localBtn.textContent = 'Tải file word từ máy tính';
  sampleBtn.hidden = true;
  sampleModal.hidden = true;
  sampleBody.classList.add('word-presentation-inline-sample');
  choiceBody.appendChild(sampleBody);
})();
</script>

<style id="mvip-limited-feature-guard-20260901">
  .limited-upgrade-modal[hidden] { display:none !important; }
  .limited-upgrade-modal {
    position:fixed; inset:0; z-index:2147483100; display:grid; place-items:center;
    padding:20px; font-family:Arial, Helvetica, sans-serif;
  }
  .limited-upgrade-backdrop {
    position:absolute; inset:0; background:rgba(15,23,42,.62); backdrop-filter:blur(3px);
  }
  .limited-upgrade-dialog {
    position:relative; z-index:1; width:min(1280px,100%); max-height:calc(100vh - 40px);
    overflow:auto; box-sizing:border-box; padding:40px;
    border:1px solid #dbe4f0; border-radius:20px; background:#fff; color:#0f172a;
    box-shadow:0 24px 70px rgba(15,23,42,.3);
  }
  .limited-upgrade-head { display:flex; align-items:flex-start; justify-content:space-between; gap:28px; }
  /* Cỡ chữ bảng chặn quyền được tăng đúng 3 lần:
     tiêu đề 25px -> 75px, nội dung 18px -> 54px, nút 16px -> 48px. */
  .limited-upgrade-head h3 { margin:0; font-size:75px; line-height:1.05; }
  .limited-upgrade-close {
    flex:0 0 92px; width:92px; height:92px; border:0; border-radius:18px; background:#f3e8ff;
    color:#7c3aed; font-size:75px; line-height:1; cursor:pointer;
  }
  .limited-upgrade-row {
    display:flex; align-items:center; justify-content:space-between; gap:34px; margin-top:36px;
  }
  .limited-upgrade-row p { flex:1 1 auto; margin:0; font-size:54px; line-height:1.32; font-weight:700; }
  .limited-upgrade-action {
    flex:0 0 auto; min-height:96px; padding:16px 34px; border:0; border-radius:18px;
    background:linear-gradient(135deg,#7c3aed,#a855f7); color:#fff; font-size:48px;
    line-height:1.12; white-space:nowrap;
    font-weight:800; cursor:pointer; box-shadow:0 10px 24px rgba(124,58,237,.26);
  }
  .subscription-modal { z-index:2147483200 !important; }
  @media (max-width:1100px) {
    .limited-upgrade-row { align-items:stretch; flex-direction:column; }
    .limited-upgrade-action { width:100%; }
  }
</style>

<!-- Bản điều chỉnh 2026-09-05: thanh công cụ viết/vẽ mặc định dọc bên phải,
     có nút thu gọn/mở lại và nút đổi nhanh giữa hai bên. -->
<style id="mvip-left-collapsible-ink-dock-20260905">
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock) {
    left:auto !important;
    right:7px !important;
    transition:width .18s ease, min-width .18s ease, padding .18s ease,
      gap .18s ease, border-radius .18s ease, box-shadow .18s ease;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock)
  > .cv7991-side-ink-popover {
    left:auto !important;
    right:calc(100% + 8px) !important;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left {
    left:7px !important;
    right:auto !important;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left
  > .cv7991-side-ink-popover {
    left:calc(100% + 8px) !important;
    right:auto !important;
  }
  .mvip-side-ink-collapse-btn {
    flex:0 0 auto;
    color:#1d4ed8 !important;
    border-color:#93c5fd !important;
    background:#eff6ff !important;
  }
  .mvip-side-ink-collapse-btn:hover,
  .mvip-side-ink-collapse-btn:focus-visible {
    color:#fff !important;
    border-color:#2563eb !important;
    background:#2563eb !important;
    outline:none;
  }
  .mvip-side-ink-collapse-btn svg { width:20px; height:20px; }
  .mvip-side-ink-position-btn {
    flex:0 0 auto;
    color:#7c3aed !important;
    border-color:#c4b5fd !important;
    background:#faf5ff !important;
  }
  .mvip-side-ink-position-btn:hover,
  .mvip-side-ink-position-btn:focus-visible {
    color:#fff !important;
    border-color:#7c3aed !important;
    background:#7c3aed !important;
    outline:none;
  }
  .mvip-side-ink-position-btn svg { width:21px; height:21px; }
  body.mvip-whiteboard-split-open :is(.mvip-side-ink-collapse-btn, .mvip-side-ink-position-btn),
  .cv7991-side-ink-dock.mvip-split-horizontal-ink-dock
  > :is(.mvip-side-ink-collapse-btn, .mvip-side-ink-position-btn) { display:none !important; }

  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-collapsed {
    width:36px !important;
    min-width:36px !important;
    gap:0 !important;
    padding:4px 2px !important;
    border-radius:12px 0 0 12px !important;
    box-shadow:0 7px 20px rgba(15,23,42,.18) !important;
    overflow:visible !important;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left.is-mvip-collapsed {
    border-radius:0 12px 12px 0 !important;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-collapsed
  > :not(.mvip-side-ink-collapse-btn) { display:none !important; }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-collapsed
  > .mvip-side-ink-collapse-btn {
    display:flex !important;
    width:30px !important;
    min-width:30px !important;
    height:42px !important;
    min-height:42px !important;
    border-radius:9px 0 0 9px !important;
  }
  body:not(.mvip-whiteboard-split-open)
  .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left.is-mvip-collapsed
  > .mvip-side-ink-collapse-btn {
    border-radius:0 9px 9px 0 !important;
  }
  @media (max-width:760px), (max-height:560px) {
    body:not(.mvip-whiteboard-split-open)
    .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock) {
      left:auto !important;
      right:4px !important;
    }
    body:not(.mvip-whiteboard-split-open)
    .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock)
    > .cv7991-side-ink-popover {
      left:auto !important;
      right:calc(100% + 5px) !important;
    }
    body:not(.mvip-whiteboard-split-open)
    .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left {
      left:4px !important;
      right:auto !important;
    }
    body:not(.mvip-whiteboard-split-open)
    .cv7991-side-ink-dock:not(.mvip-split-horizontal-ink-dock).is-mvip-left
    > .cv7991-side-ink-popover {
      left:calc(100% + 5px) !important;
      right:auto !important;
    }
  }
</style>
<script id="mvip-left-collapsible-ink-dock-script-20260905">
(() => {
  'use strict';
  const COLLAPSE_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m14.5 5-7 7 7 7" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>';
  const EXPAND_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="m9.5 5 7 7-7 7" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round"/></svg>';
  const POSITION_ICON = '<svg aria-hidden="true" viewBox="0 0 24 24" fill="none"><path d="M4 12h16M8 8l-4 4 4 4M16 8l4 4-4 4" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round"/></svg>';

  function closeDockMenus(dock) {
    dock.querySelectorAll('.cv7991-side-ink-popover, .cv7991-geometry-menu')
      .forEach((menu) => { menu.hidden = true; });
    dock.querySelectorAll('[aria-expanded="true"]')
      .forEach((control) => control.setAttribute('aria-expanded', 'false'));
  }
  function paintToggle(dock, button) {
    const collapsed = dock.classList.contains('is-mvip-collapsed');
    const onLeft = dock.classList.contains('is-mvip-left');
    button.innerHTML = collapsed
      ? (onLeft ? EXPAND_ICON : COLLAPSE_ICON)
      : (onLeft ? COLLAPSE_ICON : EXPAND_ICON);
    button.setAttribute('aria-expanded', collapsed ? 'false' : 'true');
    button.setAttribute('aria-label', collapsed
      ? 'Mở thanh công cụ viết vẽ'
      : 'Thu gọn thanh công cụ viết vẽ');
    button.title = button.getAttribute('aria-label');
  }
  function paintPositionToggle(dock, button) {
    const onLeft = dock.classList.contains('is-mvip-left');
    button.innerHTML = POSITION_ICON;
    button.setAttribute('aria-label', onLeft
      ? 'Chuyển thanh công cụ sang bên phải'
      : 'Chuyển thanh công cụ sang bên trái');
    button.title = button.getAttribute('aria-label');
  }
  function installToggle(dock) {
    if (!(dock instanceof HTMLElement)
        || dock.querySelector(':scope > .mvip-side-ink-collapse-btn')) return;
    dock.classList.remove('is-mvip-left');
    dock.classList.add('is-mvip-collapsed');
    const button = document.createElement('button');
    button.type = 'button';
    button.className = 'cv7991-side-ink-tool mvip-side-ink-collapse-btn';
    button.setAttribute('data-mvip-ink-collapse', 'true');
    paintToggle(dock, button);
    button.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      const collapsed = !dock.classList.contains('is-mvip-collapsed');
      if (collapsed) closeDockMenus(dock);
      dock.classList.toggle('is-mvip-collapsed', collapsed);
      paintToggle(dock, button);
      button.focus({ preventScroll:true });
    });
    dock.insertBefore(button, dock.firstChild);

    const positionButton = document.createElement('button');
    positionButton.type = 'button';
    positionButton.className = 'cv7991-side-ink-tool mvip-side-ink-position-btn';
    positionButton.setAttribute('data-mvip-ink-position', 'true');
    paintPositionToggle(dock, positionButton);
    positionButton.addEventListener('click', (event) => {
      event.preventDefault();
      event.stopPropagation();
      closeDockMenus(dock);
      dock.classList.toggle('is-mvip-left');
      paintPositionToggle(dock, positionButton);
      paintToggle(dock, button);
      positionButton.focus({ preventScroll:true });
    });
    dock.appendChild(positionButton);
  }
  window.mvipCollapsePresentationInkDock = (dockId) => {
    const dock = document.getElementById(dockId);
    if (!(dock instanceof HTMLElement)) return;
    installToggle(dock);
    closeDockMenus(dock);
    dock.classList.add('is-mvip-collapsed');
    const button = dock.querySelector(':scope > .mvip-side-ink-collapse-btn');
    if (button) paintToggle(dock, button);
  };
  function installAll() {
    document.querySelectorAll('#wordPresentationSideInkDock, #singleExamSideInkDock')
      .forEach(installToggle);
  }
  installAll();
  if (typeof MutationObserver === 'function') {
    const observer = new MutationObserver(installAll);
    observer.observe(document.body, { childList:true, subtree:true });
  }
})();
</script>

<div class="mvip-guide-modal" id="mvipGuideModal" hidden aria-hidden="true">
  <div class="mvip-guide-backdrop" data-mvip-guide-close></div>
  <section class="mvip-guide-dialog" role="dialog" aria-modal="true" aria-labelledby="mvipGuideHeading">
    <header class="mvip-guide-head">
      <div>
        <h2 id="mvipGuideHeading">HƯỚNG DẪN SỬ DỤNG <span>MVIP</span></h2>
        <p>Dạy học tương tác. Kiểm tra trắc nghiệm bằng thẻ</p>
      </div>
      <button class="mvip-guide-close" id="mvipGuideCloseBtn" type="button" aria-label="Đóng hướng dẫn">×</button>
    </header>
    <div class="mvip-guide-body">
      <div id="mvipGuideListView">
        <div class="mvip-guide-list" id="mvipGuideList"></div>
        <a class="mvip-guide-all-video" href="https://youtu.be/K-M7on8xpPA" target="_blank" rel="noopener noreferrer">▶ Xem video hướng dẫn toàn bộ</a>
      </div>
      <div class="mvip-guide-detail" id="mvipGuideDetailView" hidden>
        <div class="mvip-guide-detail-toolbar">
          <button class="mvip-guide-back" id="mvipGuideBackBtn" type="button">← Danh sách hướng dẫn</button>
          <a class="mvip-guide-pdf-link" href="/huong-dan-su-dung-mvip.html?v=20260908-1" target="_blank" rel="noopener">Mở hướng dẫn đầy đủ ↗</a>
        </div>
        <article class="mvip-guide-detail-card">
          <h3 id="mvipGuideDetailTitle"></h3>
          <ul id="mvipGuideDetailSteps"></ul>
          <a class="mvip-guide-btn mvip-guide-btn-video mvip-guide-detail-video" id="mvipGuideDetailVideo" href="#" target="_blank" rel="noopener noreferrer">Xem video</a>
        </article>
      </div>
    </div>
  </section>
</div>

<script id="mvip-guide-modal-script">
(() => {
  'use strict';
  const guides = [
    {
      title: '1. Đăng ký tài khoản',
      video: 'https://youtu.be/0U7eWJVwgpE',
      steps: [
        'Truy cập website mvip.vn.',
        'Bấm nút “Đăng ký”.',
        'Nhập đầy đủ thông tin theo biểu mẫu, sau đó bấm nút đăng ký.',
        'Mở email đã đăng ký và bấm liên kết xác thực tài khoản.'
      ]
    },
    {
      title: '2. Đăng nhập trên website',
      video: 'https://youtu.be/5bO73Jak9HI',
      steps: [
        'Truy cập website mvip.vn và bấm nút “Đăng nhập”.',
        'Nhập tên đăng nhập là email đã đăng ký.',
        'Nhập mật khẩu, sau đó bấm nút “Đăng nhập”.'
      ]
    },
    {
      title: '3. Cài đặt ứng dụng và đăng nhập trên điện thoại',
      video: 'https://youtu.be/RcJE_DyEp0Y',
      steps: [
        'Trên CH Play hoặc App Store, tìm ứng dụng “MVIP ScanQuiz”.',
        'Cài đặt ứng dụng. Khi mở lần đầu, chọn “Cho phép” để ứng dụng có thể chụp ảnh và quay video khi sử dụng.',
        'Nhập email đã đăng ký và mật khẩu, sau đó bấm “Đăng nhập”.'
      ]
    },
    {
      title: '4. Tạo danh sách lớp học',
      video: 'https://youtu.be/SZPo_rAGxXg',
      steps: [
        'Trên điện thoại, mở MVIP ScanQuiz, bấm biểu tượng bánh răng và bật “Cho phép mở Quản lí”.',
        'Trên website mvip.vn, đăng nhập, mở menu góc trên bên phải rồi bấm “Quản lí”.',
        'Bấm thêm lớp - môn; chọn khối, nhập tên lớp và chọn môn học.',
        'Sao chép danh sách học sinh, dán vào ô nhập danh sách; mỗi học sinh một dòng.',
        'Bấm “Lưu” ở góc trên bên phải để lưu danh sách lớp.'
      ]
    },
    {
      title: '5. Tải và sử dụng thẻ MVIP',
      video: 'https://youtu.be/RR-i7nluRDo',
      steps: [
        'Mở mục Quản lí, chọn tải thẻ và bấm tải xuống.',
        'In và phát thẻ cho học sinh theo đúng số thứ tự trong danh sách.',
        'Học sinh xoay thẻ để phương án lựa chọn hướng lên phía trên.',
        'Trên điện thoại, chọn đúng lớp - môn, bấm Start và hướng camera về các thẻ.',
        'Khi quét xong, giáo viên chọn đáp án đúng A, B, C hoặc D; hệ thống tự đối chiếu và thống kê kết quả.'
      ]
    },
    {
      title: '6. Trình chiếu tài liệu (PowerPoint, Word, PDF, Excel)',
      video: 'https://youtu.be/ii828Sx_qgE',
      steps: [
        'Tại trang chủ mvip.vn, bấm nút trình chiếu bài giảng và kiểm tra trắc nghiệm.',
        'Trong cửa sổ chọn tệp, chọn tệp PowerPoint, Word, PDF hoặc Excel cần trình chiếu.',
        'Nháy đúp vào tệp hoặc bấm “Open” để mở.'
      ]
    },
    {
      title: '7. Chuyển câu hỏi Word thành câu hỏi tương tác',
      video: 'https://youtu.be/bCWzCjH9LCY',
      steps: [
        'Soạn các câu hỏi trong tệp Word theo đúng “Mẫu câu”.',
        'Tại trang chủ, bấm nút chuyển câu hỏi Word thành câu hỏi tương tác và kiểm tra trắc nghiệm.',
        'Bấm nút tải tệp Word, chọn tệp trên máy tính rồi nháy đúp hoặc bấm “Open”.',
        'Cho học sinh tương tác trực tiếp với câu hỏi trắc nghiệm nhiều lựa chọn hoặc đúng – sai; bấm “Xem video” để xem hướng dẫn chi tiết.'
      ]
    },
    {
      title: '8. Dùng câu hỏi của MVIP',
      video: 'https://youtu.be/jCLwKS7WbMA',
      steps: [
        'Trên trang chủ, mở combo “Chọn lớp - môn” và chọn lớp - môn cần sử dụng.',
        'Bấm “Dùng câu hỏi của MVIP”.',
        'Trong màn hình tiếp theo, chọn lại lớp - môn nếu trước đó chưa chọn.',
        'Chọn số lượng câu hỏi theo mức độ và bài học, sau đó bắt đầu trình chiếu và kiểm tra.'
      ]
    },
    {
      title: '9. Soạn đề và chấm theo mã đề',
      video: 'https://youtu.be/LlgxsnvvCIs',
      steps: [
        'Mở chức năng soạn đề kiểm tra và thực hiện lần lượt các bước trên màn hình.',
        'In đề, phát đúng đề đã ghi tên cho từng học sinh.',
        'Mở “Chấm theo mã đề”, chọn đúng lớp - môn.',
        'Với từng câu, yêu cầu học sinh giơ thẻ MVIP và dùng điện thoại quét câu trả lời.',
        'Bấm “Kết quả quét” để xem kết quả; dùng nút mũi tên để chuyển sang câu tiếp theo.'
      ]
    },
    {
      title: '10. Xem kết quả kiểm tra',
      video: 'https://youtu.be/i_OMYEfLwbA',
      steps: [
        'Mở menu tài khoản, chọn “Quản lí”, sau đó mở mục kết quả.',
        'Chọn xem kết quả kiểm tra thường xuyên hằng ngày hoặc kết quả kiểm tra theo mã đề.',
        'Chọn lớp - môn và lần kiểm tra cần xem; xuất báo cáo khi cần.'
      ]
    },
    {
      title: '11. Các tác vụ khi trình chiếu',
      video: 'https://youtu.be/IqpxsY-Y-88',
      steps: [
        'Dùng Vòng quay may mắn để gọi ngẫu nhiên học sinh trả lời.',
        'Viết, vẽ bằng bút, bút nhớ, laser, tẩy; sử dụng thước thẳng, êke, thước đo độ và compa.',
        'Mở bảng trắng; chia đôi màn hình để vừa xem đề bài vừa viết hoặc xem đáp án.',
        'Dùng Quét vùng để phóng to, chọn số giây để đếm ngược, chụp màn hình và bật toàn màn hình.',
        'PowerPoint hỗ trợ hiệu ứng, âm thanh, video và danh sách slide; Word, PDF, Excel hỗ trợ phóng to, thu nhỏ và cuộn xem tài liệu.',
        'Yêu cầu học sinh giơ thẻ MVIP và dùng điện thoại quét để lấy kết quả trả lời.'
      ]
    }
  ];

  const modal = document.getElementById('mvipGuideModal');
  const openButton = document.getElementById('mvipGuideOpenBtn');
  const closeButton = document.getElementById('mvipGuideCloseBtn');
  const backButton = document.getElementById('mvipGuideBackBtn');
  const list = document.getElementById('mvipGuideList');
  const listView = document.getElementById('mvipGuideListView');
  const detailView = document.getElementById('mvipGuideDetailView');
  const detailTitle = document.getElementById('mvipGuideDetailTitle');
  const detailSteps = document.getElementById('mvipGuideDetailSteps');
  const detailVideo = document.getElementById('mvipGuideDetailVideo');
  let previousFocus = null;

  if (!modal || !openButton || !list) return;

  const showList = () => {
    listView.hidden = false;
    detailView.hidden = true;
    document.getElementById('mvipGuideHeading')?.scrollIntoView({block:'nearest'});
  };

  const showDetail = (index) => {
    const guide = guides[index];
    if (!guide) return;
    detailTitle.textContent = guide.title;
    detailSteps.replaceChildren(...guide.steps.map((step) => {
      const li = document.createElement('li');
      li.textContent = step;
      return li;
    }));
    detailVideo.href = guide.video;
    listView.hidden = true;
    detailView.hidden = false;
    detailView.scrollIntoView({block:'start'});
    backButton.focus({preventScroll:true});
  };

  guides.forEach((guide, index) => {
    const row = document.createElement('div');
    row.className = 'mvip-guide-row';

    const title = document.createElement('div');
    title.className = 'mvip-guide-title';
    title.textContent = guide.title;

    const video = document.createElement('a');
    video.className = 'mvip-guide-btn mvip-guide-btn-video';
    video.href = guide.video;
    video.target = '_blank';
    video.rel = 'noopener noreferrer';
    video.textContent = 'Xem video';

    const documentButton = document.createElement('button');
    documentButton.className = 'mvip-guide-btn mvip-guide-btn-doc';
    documentButton.type = 'button';
    documentButton.textContent = 'Xem tài liệu';
    documentButton.addEventListener('click', () => showDetail(index));

    row.append(title, video, documentButton);
    list.appendChild(row);
  });

  const openModal = () => {
    previousFocus = document.activeElement;
    showList();
    modal.hidden = false;
    modal.setAttribute('aria-hidden', 'false');
    document.documentElement.classList.add('mvip-guide-modal-open');
    closeButton.focus({preventScroll:true});
  };

  const closeModal = () => {
    modal.hidden = true;
    modal.setAttribute('aria-hidden', 'true');
    document.documentElement.classList.remove('mvip-guide-modal-open');
    if (previousFocus && typeof previousFocus.focus === 'function') previousFocus.focus({preventScroll:true});
  };

  openButton.addEventListener('click', (event) => {
    event.preventDefault();
    openModal();
  });
  closeButton.addEventListener('click', closeModal);
  backButton.addEventListener('click', showList);
  modal.querySelectorAll('[data-mvip-guide-close]').forEach((element) => element.addEventListener('click', closeModal));
  document.addEventListener('keydown', (event) => {
    if (event.key === 'Escape' && !modal.hidden) closeModal();
  });
})();
</script>

<style id="mvip-multiple-question-media-20260907">
/* Mỗi ảnh/bảng giữ một khung riêng, đúng thứ tự Word và đủ toàn bộ nội dung. */
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) > .word-presentation-content-shell { display:grid !important; grid-template-columns:minmax(0,1fr) !important; grid-template-rows:auto auto auto !important; height:auto !important; min-height:0 !important; max-height:none !important; gap:12px !important; align-content:start !important; overflow:visible !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) > .word-presentation-content-shell > .word-presentation-question-line { grid-column:1 !important; grid-row:1 !important; width:100% !important; max-width:100% !important; min-width:0 !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) > .word-presentation-content-shell > .word-presentation-items { position:relative !important; grid-column:1 !important; grid-row:2 !important; width:100% !important; max-width:100% !important; min-width:0 !important; margin-top:0 !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) > .word-presentation-content-shell > .word-presentation-media-panel { position:relative !important; inset:auto !important; grid-column:1 !important; grid-row:3 !important; display:grid !important; grid-template-columns:repeat(var(--cv-multi-media-columns,2),minmax(0,1fr)) !important; gap:var(--cv-multi-media-gap,12px) !important; width:100% !important; height:auto !important; max-width:100% !important; max-height:none !important; min-height:0 !important; align-items:start !important; align-content:start !important; justify-self:stretch !important; align-self:start !important; overflow:visible !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) .cv7991-multi-media-slot { position:relative !important; min-width:0 !important; width:100% !important; overflow:hidden !important; box-sizing:border-box !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) .cv7991-multi-media-content { position:absolute !important; top:0 !important; transform-origin:top left !important; margin:0 !important; padding:0 !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) .cv7991-multi-media-content > :is(img,canvas,.single-exam-inline-vector) { display:block !important; width:100% !important; height:100% !important; max-width:none !important; max-height:none !important; min-width:0 !important; min-height:0 !important; margin:0 !important; object-fit:contain !important; object-position:center !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) .cv7991-multi-media-content > .single-exam-inline-vector > svg { width:100% !important; height:100% !important; max-width:none !important; max-height:none !important; }
:is(#wordPresentationPresenter, #singleExamPresenter) :is(.word-presentation-card.cv7991-multiple-question-media, .word-presentation-card .word-presentation-all-question.cv7991-multiple-question-media) .cv7991-multi-media-content > :is(table,.single-exam-inline-table) { display:table !important; width:max-content !important; height:auto !important; max-width:none !important; max-height:none !important; table-layout:auto !important; border-collapse:collapse !important; margin:0 !important; font-size:1em !important; transform:none !important; }
</style>

<style id="mvip-source-question-layout-20260907">
/* A source-sized card scales as a single unit in all three question views. */
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout.cv7991-source-question-layout {
  box-sizing:border-box !important;
  width:var(--cv-source-card-width, 688px) !important;
  min-width:var(--cv-source-card-width, 688px) !important;
  max-width:var(--cv-source-card-width, 688px) !important;
  height:auto !important; min-height:0 !important; max-height:none !important;
  padding:24px !important; font-size:var(--cv-source-font, 16px) !important;
  line-height:1.27 !important; overflow:visible !important;
  text-align:left !important; transform-origin:top left !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-content-shell {
  display:block !important; position:relative !important; height:auto !important;
  min-height:0 !important; max-height:none !important; overflow:visible !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-question-line {
  display:block !important; width:auto !important; height:auto !important;
  margin:0 !important; padding:0 !important; float:none !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-question-prompt,
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .cv7991-source-prompt {
  display:inline !important; font-size:inherit !important; line-height:inherit !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .cv7991-source-paragraph {
  position:relative; display:block; white-space:pre-wrap; tab-size:8;
  padding:0; min-height:1em; word-break:normal; overflow-wrap:normal;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .cv7991-source-paragraph.is-source-first-inline {
  display:inline;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout :is(.single-exam-inline-media, .single-exam-inline-vector, .single-exam-word-group-figure) {
  max-width:none !important; max-height:none !important; min-width:0 !important; min-height:0 !important;
  margin:0 !important; flex:none !important; vertical-align:baseline;
  border:0 !important; border-radius:0 !important; padding:0 !important; box-shadow:none !important;
  object-fit:fill !important; overflow:visible !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout :is(.single-exam-inline-vector, .single-exam-word-group-figure) > svg {
  display:block !important; width:100% !important; height:100% !important;
  max-width:none !important; max-height:none !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout table.single-exam-inline-table {
  display:table !important; max-width:none !important; max-height:none !important;
  table-layout:fixed !important; margin:0 !important; font-size:inherit !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout table.single-exam-inline-table :is(td, th) {
  white-space:normal !important; font-size:inherit; padding:0 5px !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-items {
  clear:both !important; display:grid !important; grid-template-columns:1fr !important;
  float:none !important; width:auto !important; gap:.3em !important; margin:.6em 0 0 !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-item {
  min-height:0 !important; font-size:inherit !important; padding:.3em .4em !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-item-flow {
  transform:none !important; font-size:inherit !important;
}
/* Real source paragraphs form one coordinate space for floating Word drawings. */
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .cv7991-source-prompt[data-cv-source-flow="paragraphs"] {
  display:flow-root !important; position:relative; width:100%; isolation:isolate;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout [data-cv-source-paragraph-index] {
  display:block; position:relative;
}
/* A real source space already follows the heading label. Extra UI spacing
   can push the last word that fits to the other side of a floating picture. */
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .cv7991-source-wrapped-text .word-presentation-question-label {
  margin-right:0 !important;
}
/* Source headings keep their actual Word typography and separator. */
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-source-question-layout .word-presentation-question-label[data-cv-source-heading-metrics] {
  margin:0 !important; padding:0 !important; letter-spacing:inherit !important;
}
.cv7991-source-question-stage { position:relative; width:100%; margin:0 0 20px; }
.cv7991-source-question-stage > .cv7991-source-question-layout {
  position:absolute !important; left:0 !important; top:0 !important; margin:0 !important;
}

</style>
<style id="mvip-question-media-without-zoom-frames">
/* A light-blue outline marks zoomable objects without changing their size or position. */
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-media-zoom-object:is(img, canvas, .single-exam-inline-media, .single-exam-inline-vector, .single-exam-word-group-figure) {
  border:0 !important; border-radius:0 !important; outline:0 !important;
  background:transparent !important; box-shadow:none !important; filter:none !important;
  overflow:visible !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-shape-overlap,
:is(#wordPresentationPresenter, #singleExamPresenter) .cv7991-shape-overlap :is(img, svg, .single-exam-word-group-figure) {
  cursor:default !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) [data-word-image-zoom="1"],
:is(#wordPresentationPresenter, #singleExamPresenter) [data-word-image-zoom="1"] :is(img, svg, .single-exam-word-group-figure) {
  cursor:zoom-in !important; pointer-events:auto !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) [data-word-image-zoom="1"]:not(.cv7991-shape-overlap) {
  outline:1.5px solid #93c5fd !important; outline-offset:-1.5px !important;
}
:is(#wordPresentationPresenter, #singleExamPresenter) [data-word-image-zoom="1"]:focus-visible {
  outline:1.5px solid #2563eb !important; outline-offset:-1.5px !important;
}
</style>

<style id="mvip-document-hyperlink-styles">
  .mvip-document-object-link { position:absolute !important; inset:0 !important; display:block !important;
    z-index:5; background:transparent !important; pointer-events:auto !important; cursor:pointer !important; }
  .mvip-pdf-link-layer { position:absolute; inset:0; pointer-events:none; }
  .mvip-pdf-hyperlink { position:absolute; display:block; pointer-events:auto; cursor:pointer; background:transparent; }
  .mvip-xlsx-cell-link, .mvip-pptx-text-link { font:inherit; color:inherit; text-decoration:inherit; cursor:pointer; pointer-events:auto !important; }
  .mvip-pptx-text-link { position:relative; z-index:91; }
  :is(#wordPresentationCard, #wordPresentationAnswerContent, #singleExamSlide) a[href],
  :is(#wordPresentationCard, #wordPresentationAnswerContent, #singleExamSlide) a[href] * { cursor:pointer !important; }
</style>
<style id="mvip-system-clock-style">
  .mvip-system-clock {
    display:inline-flex; flex:0 0 auto; align-items:center; justify-content:center;
    width:96px; height:32px; box-sizing:border-box; margin:0; padding:0 6px;
    color:#1d4ed8; background:#eff6ff; border:1px solid #bfdbfe; border-radius:9px;
    text-align:center; white-space:nowrap;
    font:700 16px/1 Arial, Helvetica, sans-serif;
    font-variant-numeric:tabular-nums; letter-spacing:.5px;
    user-select:none; -webkit-user-select:none;
  }
  /* Keep the clock reachable when a narrow toolbar needs horizontal scrolling. */
  #wordPresentationPresenter .word-presentation-actions:has(> .mvip-system-clock) {
    justify-content:flex-start !important;
    justify-content:safe flex-end !important;
  }
  :is(#wordPresentationPresenter, #singleExamPresenter).mvip-whiteboard-split .mvip-system-clock {
    display:inline-flex !important; visibility:visible !important; order:56;
  }
  #wordPresentationScanStatus:empty { display:none !important; }
  #wordPresentationScanTools:has(> #wordPresentationScanStatus:empty):not(:has(> button:not([hidden]))) {
    display:none !important;
  }
  @media (max-width:760px) {
    .mvip-system-clock { width:84px; height:30px; font-size:14px; }
  }
</style>
<script id="mvip-system-clock-script">
(() => {
  'use strict';
  const entries = [];
  [
    ['wordPresentationPresenter', '.word-presentation-actions'],
    ['singleExamPresenter', '.single-exam-toolbar-actions']
  ].forEach(([id, selector]) => {
    const presenter = document.getElementById(id);
    const toolbar = presenter && presenter.querySelector(selector);
    if (!toolbar || presenter.querySelector('.mvip-system-clock')) return;
    const clock = document.createElement('span');
    clock.className = 'mvip-system-clock';
    clock.setAttribute('role', 'timer');
    clock.setAttribute('aria-live', 'off');
    clock.title = 'Giờ hiện tại trên máy tính';
    // Isolate clock text changes from the presenter's existing
    // content observers so the clock never requests a slide redraw/refit.
    const text = document.createTextNode('--:--');
    clock.attachShadow({ mode:'open' }).appendChild(text);
    function placeClock() {
      const strip = id === 'wordPresentationPresenter'
        && presenter.classList.contains('mvip-whiteboard-split')
        && presenter.classList.contains('is-powerpoint-slide-mode')
        ? document.getElementById('mvipPowerPointSplitLeftToolStrip') : null;
      if (strip) {
        if (clock.parentElement !== strip) strip.appendChild(clock);
        return;
      }
      if (clock.parentElement === toolbar) return;
      const anchor = presenter.querySelector(id === 'wordPresentationPresenter'
        ? '#wordPresentationScanTools' : '#cv7991SingleMagicWheelBtn');
      if (anchor && anchor.parentElement === toolbar) {
        if (id === 'wordPresentationPresenter') toolbar.insertBefore(clock, anchor);
        else anchor.insertAdjacentElement('afterend', clock);
      } else toolbar.insertBefore(clock, toolbar.firstChild);
    }
    placeClock();
    if (id === 'wordPresentationPresenter') {
      new MutationObserver(placeClock).observe(presenter, {
        attributes:true, attributeFilter:['class']
      });
    }
    entries.push({ presenter, text });
  });
  if (!entries.length) return;

  let timer = null;
  let pageActive = true;
  function stop() {
    if (timer !== null) clearTimeout(timer);
    timer = null;
  }
  function tick() {
    stop();
    if (!pageActive || document.hidden) return;
    const visible = entries.filter(({ presenter }) => !presenter.hidden);
    if (!visible.length) return;
    // Read the computer's local clock each time instead of accumulating ticks.
    // This also resynchronizes after sleep, a clock/time-zone change or tab return.
    const now = new Date();
    const pad = value => String(value).padStart(2, '0');
    const value = [now.getHours(), now.getMinutes()].map(pad).join(':');
    visible.forEach(({ text }) => { if (text.data !== value) text.data = value; });
    timer = setTimeout(tick, 60000 - now.getSeconds() * 1000 - now.getMilliseconds());
  }
  const observer = new MutationObserver(tick);
  entries.forEach(({ presenter }) => observer.observe(presenter, {
    attributes:true, attributeFilter:['hidden']
  }));
  document.addEventListener('visibilitychange', tick);
  window.addEventListener('focus', tick);
  window.addEventListener('pagehide', () => { pageActive = false; stop(); });
  window.addEventListener('pageshow', () => { pageActive = true; tick(); });
  tick();
})();
</script>

<style id="mvip-reduced-presentation-toolbar-style">
/* Outside presentation fullscreen, keep navigation, results, fullscreen and close.
   CSS follows fullscreen/fallback state directly and leaves split tools intact. */
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) #wordPresentationSideInkDock,
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) #singleExamSideInkDock {
  display:none !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar {
  flex-wrap:nowrap !important; gap:8px !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar > .word-presentation-title {
  flex:1 1 auto !important; min-width:0 !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar .word-presentation-actions {
  flex:0 0 auto !important; width:auto !important; min-width:0 !important;
  flex-wrap:nowrap !important; justify-content:flex-end !important; gap:6px !important;
  overflow:visible !important; padding-bottom:0 !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar .word-presentation-actions > *:not(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn)):not(:has(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn))),
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar .word-presentation-actions > *:has(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn)) > *:not(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn)):not(:has(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn))) {
  display:none !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar .word-presentation-actions > *:has(:is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn)) {
  display:flex !important; visibility:visible !important; margin:0 !important;
  flex:0 0 auto !important; gap:6px !important;
}
body:not(.mvip-whiteboard-split-open) #wordPresentationPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .word-presentation-toolbar .word-presentation-actions :is(#wordPresentationPrevBtn, #wordPresentationNextBtn, #wordPresentationResultBtn, #wordPresentationFullscreenBtn, #wordPresentationCloseBtn) {
  display:inline-flex !important; visibility:visible !important;
  align-items:center !important; justify-content:center !important; flex:0 0 auto !important;
}

body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar {
  flex-wrap:nowrap !important; gap:8px !important;
}
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar > .single-exam-toolbar-title {
  flex:1 1 auto !important; min-width:0 !important;
}
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar .single-exam-toolbar-actions {
  flex:0 0 auto !important; width:auto !important; min-width:0 !important;
  flex-wrap:nowrap !important; justify-content:flex-end !important; gap:6px !important;
  overflow:visible !important; padding-bottom:0 !important;
}
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar .single-exam-toolbar-actions > *:not(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn)):not(:has(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn))),
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar .single-exam-toolbar-actions > *:has(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn)) > *:not(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn)):not(:has(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn))) {
  display:none !important;
}
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar .single-exam-toolbar-actions > *:has(:is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn)) {
  display:flex !important; visibility:visible !important; margin:0 !important;
  flex:0 0 auto !important; gap:6px !important;
}
body:not(.mvip-whiteboard-split-open):not(.single-exam-fullscreen-fallback) #singleExamPresenter:not(:is(:fullscreen, :-webkit-full-screen)):not(.is-fallback-fullscreen) > .single-exam-toolbar .single-exam-toolbar-actions :is(#regularTestPrevBtn:not([hidden]), #regularTestNextBtn:not([hidden]), #singleExamViewBtn, #singleExamFullscreenBtn, #singleExamCloseBtn) {
  display:inline-flex !important; visibility:visible !important;
  align-items:center !important; justify-content:center !important; flex:0 0 auto !important;
}

/* Results are available after returning from presentation fullscreen. */
#wordPresentationPresenter:is(:fullscreen, :-webkit-full-screen, .is-fallback-fullscreen) #wordPresentationResultBtn,
#singleExamPresenter:is(:fullscreen, :-webkit-full-screen, .is-fallback-fullscreen) #singleExamViewBtn,
body.single-exam-fullscreen-fallback #singleExamPresenter #singleExamViewBtn {
  display:none !important;
}
</style>

<style id="mvip-word-scan-result-green-style">
  #wordPresentationScanStatus:empty { display:none !important; }
  .word-presentation-item.is-scan-correct-answer:not(.is-scan-answer-error) {
    background:#bbf7d0; border-color:#16a34a !important; color:inherit !important;
    box-shadow:inset 0 0 0 2px rgba(22,163,74,.16) !important;
  }
  .word-presentation-item.is-scan-correct-answer:not(.is-scan-answer-error) .word-presentation-item-label {
    color:#1d4ed8 !important;
  }
  .word-presentation-item.is-scan-correct-answer:not(.is-scan-answer-error) :is(.word-presentation-item-content, .single-exam-rich, .single-exam-inline-fallback) {
    font-weight:inherit;
  }
</style>
<script id="mvip-align-question-toolbar-script">
(() => {
  // Match the Word toolbar's order using the existing MVIP controls.
  const actions = document.querySelector('#singleExamPresenter .single-exam-toolbar-actions');
  if (!actions) return;
  const selectors = [
    '#singleExamClassSelect', '#cv7991SingleMagicWheelBtn', '#singleExamInkTools',
    '.mvip-system-clock', '#singleExamViewBtn', '#singleExamWhiteboardBtn',
    '#singleExamWhiteboardSplitBtn', '#singleExamAnswerBtn', '#singleExamToolbarGuideBtn',
    '#singleExamRegionBtn', '#singleExamCountdownInput', '#singleExamFullscreenBtn',
    '#regularTestPrevBtn', '#regularTestNextBtn', '#regularTestQuestionState',
    '#singleExamNextBtn', '#singleExamCloseBtn', '#singleExamPasteCaptureBtn'
  ];
  selectors.forEach((selector) => {
    const control = actions.querySelector(selector);
    if (control && control.parentElement === actions) actions.appendChild(control);
  });
})();
</script>

<style id="mvip-class-subject-attention-style">
  @keyframes mvip-class-subject-attention {
    0%, 100% { background-color:#fff1f2; border-color:#dc2626; color:#991b1b; box-shadow:0 0 0 0 rgba(185,28,28,0); }
    50% { background-color:#b91c1c; border-color:#7f1d1d; color:#fff; box-shadow:0 0 0 4px rgba(185,28,28,.4); }
  }
  :is(#wordPresentationClassSelect, #singleExamClassSelect, #compactClassSubjectSelect, #classSubjectSelect):not(:disabled):has(> option:checked[value=""]) {
    animation:mvip-class-subject-attention 2s ease-in-out infinite;
  }
  @media (prefers-reduced-motion:reduce) {
    :is(#wordPresentationClassSelect, #singleExamClassSelect, #compactClassSubjectSelect, #classSubjectSelect):not(:disabled):has(> option:checked[value=""]) {
      animation:none; background-color:#b91c1c; border-color:#7f1d1d; color:#fff; box-shadow:0 0 0 2px rgba(185,28,28,.4);
    }
  }
  :is(#wordPresentationClassSelect, #singleExamClassSelect, #compactClassSubjectSelect, #classSubjectSelect) option {
    background:#fff; color:#0f172a;
  }
</style>

<style id="mvip-fullscreen-toolbar-fit-style">
  #singleExamPresenter:is(:fullscreen, :-webkit-full-screen):not(.mvip-whiteboard-split) > .single-exam-toolbar,
  body.single-exam-fullscreen-fallback #singleExamPresenter:not(.mvip-whiteboard-split) > .single-exam-toolbar {
    justify-content:flex-start; flex-wrap:nowrap; gap:10px;
  }
  #singleExamPresenter:is(:fullscreen, :-webkit-full-screen):not(.mvip-whiteboard-split) > .single-exam-toolbar > .single-exam-toolbar-title,
  body.single-exam-fullscreen-fallback #singleExamPresenter:not(.mvip-whiteboard-split) > .single-exam-toolbar > .single-exam-toolbar-title {
    flex:0 0 64px; max-width:64px;
  }
  #singleExamPresenter:is(:fullscreen, :-webkit-full-screen):not(.mvip-whiteboard-split) > .single-exam-toolbar > .single-exam-toolbar-actions,
  body.single-exam-fullscreen-fallback #singleExamPresenter:not(.mvip-whiteboard-split) > .single-exam-toolbar > .single-exam-toolbar-actions {
    flex:1 1 0; min-width:0; justify-content:flex-end; flex-wrap:wrap; gap:6px;
  }
</style>

<script id="mvip-exam-mixer-20260930">
(() => {
  'use strict';

  const byId = (id) => document.getElementById(id);
  const els = {
    open: byId('introExamMixerBtn'),
    guideModal: byId('examMixerGuideModal'), guideClose: byId('examMixerGuideCloseBtn'), guideOk: byId('examMixerGuideOkBtn'),
    modal: byId('examMixerModal'), close: byId('examMixerCloseBtn'),
    upload: byId('examMixerUploadBtn'), file: byId('examMixerFileInput'), fileName: byId('examMixerFileName'),
    title: byId('examMixerExamTitle'), district: byId('examMixerDistrict'), school: byId('examMixerSchool'),
    subject: byId('examMixerSubject'), grade: byId('examMixerGrade'), year: byId('examMixerSchoolYear'), duration: byId('examMixerDuration'),
    count: byId('examMixerCodeCount'), shuffle: byId('examMixerShuffleBtn'), status: byId('examMixerStatus'),
    previewCode: byId('examMixerPreviewCode'), preview: byId('examMixerPreview'), download: byId('examMixerDownloadBtn'),
    answer: byId('examMixerAnswerBtn'), answerMenu: byId('examMixerAnswerMenu'), answerExcel: byId('examMixerAnswerExcelBtn'), answerWord: byId('examMixerAnswerWordBtn'),
    essayLineCount: byId('examMixerEssayLineCount'),
  };
  if (!els.open || !els.modal) return;

  const state = { file: null, sourceText: '', questions: [], versions: [], imageMap: {}, tableMap: {}, assetSeq: 0, richAssetMeta: new Map(), oleAssets: new Map(), oleSeq: 0, ommlAssets: new Map(), ommlSeq: 0 };
  const typeOrder = ['single', 'true_false', 'short', 'essay'];
  const typeLabel = {
    single: 'I. TRẮC NGHIỆM NHIỀU LỰA CHỌN',
    true_false: 'II. TRẮC NGHIỆM ĐÚNG - SAI',
    short: 'III. TRẢ LỜI NGẮN',
    essay: 'IV. TỰ LUẬN',
  };
  const formatMap = { single: 'mc', true_false: 'tf', short: 'short', essay: 'essay' };
  const esc = (value) => String(value == null ? '' : value)
    .replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;').replace(/'/g,'&#39;');

  const defaultMixRule = { mode: 3, fixed: false, group: 1 };

  function mixerAttr(node, local) {
    if (!node || !node.getAttribute) return '';
    return node.getAttribute(`r:${local}`) || node.getAttribute(local)
      || Array.from(node.attributes || []).find((a)=>String(a.name||'').endsWith(`:${local}`))?.value || '';
  }

  function mixerRelId(node) {
    return mixerAttr(node,'embed') || mixerAttr(node,'id') || mixerAttr(node,'link') || '';
  }

  function mixerNormalizePath(target) {
    const raw=String(target||'').replace(/^\/+/, '');
    if (raw.startsWith('word/')) return raw;
    const parts=[];
    (`word/${raw}`).split('/').forEach((part)=>{ if(!part||part==='.')return; if(part==='..')parts.pop(); else parts.push(part); });
    return parts.join('/');
  }

  function mixerBytesToDataUrl(bytes, mime) {
    if (!bytes || !bytes.length) return '';
    let binary='';
    const chunk=0x8000;
    for(let i=0;i<bytes.length;i+=chunk) binary += String.fromCharCode(...bytes.subarray(i,Math.min(bytes.length,i+chunk)));
    return `data:${mime};base64,${btoa(binary)}`;
  }

  function mixerMime(path) {
    const p=String(path||'').toLowerCase();
    if(/\.png$/.test(p))return'image/png'; if(/\.jpe?g$/.test(p))return'image/jpeg';
    if(/\.gif$/.test(p))return'image/gif'; if(/\.webp$/.test(p))return'image/webp';
    if(/\.bmp$/.test(p))return'image/bmp'; if(/\.wmf$/.test(p))return'image/wmf'; if(/\.emf$/.test(p))return'image/emf';
    return'application/octet-stream';
  }

  function mixerCssLengthToPt(value) {
    const raw=String(value||'').trim().toLowerCase();
    const m=raw.match(/^(-?\d*\.?\d+)\s*(pt|px|in|cm|mm)?$/i);
    if(!m)return 0;
    const n=Number(m[1]); if(!Number.isFinite(n))return 0;
    const unit=m[2]||'pt';
    if(unit==='pt')return n;
    if(unit==='px')return n*0.75;
    if(unit==='in')return n*72;
    if(unit==='cm')return n/2.54*72;
    if(unit==='mm')return n/25.4*72;
    return n;
  }

  function mixerObjectDisplayMeta(obj) {
    const result={isMathType:false,widthPt:0,heightPt:0,positionHalfPt:0};
    if(!obj)return result;
    const all=Array.from(obj.getElementsByTagName('*'));
    const ole=all.find((e)=>String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()==='oleobject');
    result.isMathType=/Equation|MathType|DSMT/i.test(String(ole&&ole.getAttribute('ProgID')||''));
    const shape=all.find((e)=>String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()==='shape');
    const style=String(shape&&shape.getAttribute('style')||'');
    const wm=style.match(/(?:^|;)\s*width\s*:\s*([^;]+)/i);
    const hm=style.match(/(?:^|;)\s*height\s*:\s*([^;]+)/i);
    if(wm)result.widthPt=mixerCssLengthToPt(wm[1]);
    if(hm)result.heightPt=mixerCssLengthToPt(hm[1]);
    if(!(result.widthPt>0)){const v=Number(mixerAttr(obj,'dxaOrig'));if(v>0)result.widthPt=v/20;}
    if(!(result.heightPt>0)){const v=Number(mixerAttr(obj,'dyaOrig'));if(v>0)result.heightPt=v/20;}
    let run=obj.parentNode;
    while(run&&run.nodeType===Node.ELEMENT_NODE&&String(run.localName||run.nodeName||'').split(':').pop().toLowerCase()!=='r')run=run.parentNode;
    if(run){
      const pos=Array.from(run.getElementsByTagName('*')).find((e)=>String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()==='position');
      const v=Number(mixerAttr(pos,'val')); if(Number.isFinite(v))result.positionHalfPt=v;
    }
    return result;
  }

  function mixerImageMarker(item) {
    if(!item||!item.dataUrl)return '';
    if(item.isMathType){
      const w=Math.max(0,Number(item.sourceWidthPt)||0).toFixed(2);
      const h=Math.max(0,Number(item.sourceHeightPt)||0).toFixed(2);
      const p=Number.isFinite(Number(item.sourcePositionHalfPt))?String(Math.round(Number(item.sourcePositionHalfPt))):'0';
      const oleKey=String(item.oleKey||'').replace(/[^A-Za-z0-9_-]/g,'');
      return `[[IMG:${item.dataUrl}|M:${w}:${h}:${p}${oleKey?`|O:${oleKey}`:''}]]`;
    }
    return `[[IMG:${item.dataUrl}]]`;
  }


  function mixerEncodeTable(tableData) {
    try {
      const payload=Array.isArray(tableData)?{rows:tableData}:tableData;
      if(!payload||!Array.isArray(payload.rows))return '';
      return `[[TABLE64:${btoa(unescape(encodeURIComponent(JSON.stringify(payload))))}]]`;
    } catch (_) { return ''; }
  }

  function mixerDecodeTable(marker) {
    const m=String(marker||'').trim().match(/^\[\[TABLE64:([^\]]+)\]\]$/i); if(!m)return null;
    try {
      const x=JSON.parse(decodeURIComponent(escape(atob(m[1]))));
      if(!x||!Array.isArray(x.rows))return null;
      return {rows:x.rows,style:(x.style&&typeof x.style==='object')?x.style:{}};
    } catch(_){return null;}
  }

  async function readMixerDocx(arrayBuffer) {
    if (!window.JSZip) throw new Error('Chưa tải được bộ đọc Word.');
    state.richAssetMeta.clear();
    state.oleAssets.clear();
    state.oleSeq=0;
    state.ommlAssets.clear();
    state.ommlSeq=0;
    const zip=await window.JSZip.loadAsync(arrayBuffer);
    const docEntry=zip.file('word/document.xml'); if(!docEntry) throw new Error('File Word không có document.xml.');
    const parser=new DOMParser();
    const doc=parser.parseFromString(await docEntry.async('string'),'application/xml');
    if(doc.getElementsByTagName('parsererror').length) throw new Error('Nội dung Word không hợp lệ.');
    const relEntry=zip.file('word/_rels/document.xml.rels');
    const relMap=new Map();
    if(relEntry){
      const rd=parser.parseFromString(await relEntry.async('string'),'application/xml');
      Array.from(rd.getElementsByTagNameNS('*','Relationship')).forEach((r)=>relMap.set(r.getAttribute('Id')||'',r));
    }
    const media=new Map();
    for(const [rid,rel] of relMap){
      const type=String(rel.getAttribute('Type')||''); const target=String(rel.getAttribute('Target')||'');
      if(!/\/image$/i.test(type)||!target||/^External$/i.test(rel.getAttribute('TargetMode')||'')) continue;
      const path=mixerNormalizePath(target); const entry=zip.file(path); if(!entry)continue;
      const data=await entry.async('uint8array'); const mime=mixerMime(path);
      media.set(rid,{rid,path,data,mime,dataUrl:/^image\/(?:png|jpe?g|gif|webp|bmp)$/i.test(mime)?mixerBytesToDataUrl(data,mime):''});
    }
    // Pair MathType preview WMF with OLE bytes.
    const allEls=Array.from(doc.getElementsByTagName('*'));
    for(const obj of allEls.filter((e)=>String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()==='object')){
      const ds=Array.from(obj.getElementsByTagName('*'));
      const preview=ds.find((e)=>['imagedata','blip'].includes(String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()));
      const ole=ds.find((e)=>String(e.localName||e.nodeName||'').split(':').pop().toLowerCase()==='oleobject');
      const pid=mixerRelId(preview), oid=mixerRelId(ole), item=media.get(pid), rel=relMap.get(oid);
      if(!item||!rel||!/\/oleObject$/i.test(rel.getAttribute('Type')||''))continue;
      const op=mixerNormalizePath(rel.getAttribute('Target')||''); const oe=zip.file(op); if(!oe)continue;
      item.oleData=await oe.async('uint8array'); item.olePath=op; item.program=String(ole&&ole.getAttribute('ProgID')||'');
      const displayMeta=mixerObjectDisplayMeta(obj); item.isMathType=!!displayMeta.isMathType; item.sourceWidthPt=Number(displayMeta.widthPt)||0; item.sourceHeightPt=Number(displayMeta.heightPt)||0; item.sourcePositionHalfPt=Number(displayMeta.positionHalfPt)||0;
      if(item.isMathType && item.oleData && item.data){
        const oleKey=`mt${++state.oleSeq}`;
        item.oleKey=oleKey;
        let objectXml='';
        try{objectXml=new XMLSerializer().serializeToString(obj);}catch(_){}
        state.oleAssets.set(oleKey,{
          key:oleKey,
          objectXml,
          previewRid:pid,
          oleRid:oid,
          previewData:item.data,
          previewPath:item.path||'',
          previewMime:item.mime||mixerMime(item.path||''),
          oleData:item.oleData,
          olePath:item.olePath||'',
          program:item.program||'Equation.DSMT4',
          widthPt:Number(item.sourceWidthPt)||0,
          heightPt:Number(item.sourceHeightPt)||0,
          positionHalfPt:Number(item.sourcePositionHalfPt)||0
        });
      }
    }
    // Turn MathType WMF previews into real PNG using the same renderer as Word presentation.
    for(const item of media.values()){
      if(!item.dataUrl && /Equation|MathType|DSMT/i.test(String(item.program||'')) && typeof cv7991ConvertMathTypeTexForPresenter==='function'){
        try { await cv7991ConvertMathTypeTexForPresenter(item); if(item.presenterDataUrl)item.dataUrl=item.presenterDataUrl; } catch(err){ console.warn('Mixer MathType render failed',err); }
      }
      if(item.dataUrl){
        state.richAssetMeta.set(item.dataUrl,{isMathType:!!item.isMathType,widthPt:Number(item.sourceWidthPt)||0,heightPt:Number(item.sourceHeightPt)||0,positionHalfPt:Number(item.sourcePositionHalfPt)||0,tex:String(item.presenterTex||''),oleKey:String(item.oleKey||'')});
      }
    }


    function mixerSerializeOmml(node){
      if(!node)return '';
      let xml='';
      try{xml=new XMLSerializer().serializeToString(node);}catch(_){return '';}
      if(!xml)return '';
      if(!/xmlns:m=/i.test(xml)){
        xml=xml.replace(/^<m:(oMathPara|oMath)\b/i,
          '<m:$1 xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"');
      }
      if(/<w:/i.test(xml)&&!/xmlns:w=/i.test(xml)){
        xml=xml.replace(/^<m:(oMathPara|oMath)\b/i,
          '<m:$1 xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"');
      }
      return xml;
    }
    function mixerOmmlPlainText(node){
      const parts=[];
      try{
        const ts=Array.from(node&&node.getElementsByTagNameNS('*','t')||[]);
        ts.forEach((t)=>parts.push(String(t.textContent||'')));
      }catch(_){}
      return parts.join('').replace(/\s+/g,' ').trim();
    }
    function mixerOmmlMarker(node){
      const xml=mixerSerializeOmml(node);
      if(!xml)return '';
      const key=`eq${++state.ommlSeq}`;
      const local=String(node.localName||node.nodeName||'').split(':').pop().toLowerCase();
      state.ommlAssets.set(key,{
        key,
        xml,
        display:local==='omathpara',
        plainText:mixerOmmlPlainText(node)
      });
      return `[[OMML:${key}]]`;
    }

    function collectIds(node,out){
      if(!node||node.nodeType!==Node.ELEMENT_NODE)return;
      const ln=String(node.localName||node.nodeName||'').split(':').pop().toLowerCase();
      if(ln==='blip'||ln==='imagedata'){const id=mixerRelId(node);if(id)out.push(id);}
      Array.from(node.childNodes||[]).forEach((c)=>collectIds(c,out));
    }
    function richParagraph(p){
      let s='';
      function walk(n){
        if(!n)return;
        if(n.nodeType===Node.TEXT_NODE){return;}
        if(n.nodeType!==Node.ELEMENT_NODE)return;
        const ln=String(n.localName||n.nodeName||'').split(':').pop().toLowerCase();
        if(ln==='omathpara'||ln==='omath'){
          const marker=mixerOmmlMarker(n);
          if(marker)s+=marker;
          return;
        }
        if(ln==='t'){s+=String(n.textContent||'');return;}
        if(ln==='tab'){s+='\t';return;} if(ln==='br'||ln==='cr'){s+='\n';return;}
        if(ln==='object'||ln==='drawing'||ln==='pict'){
          const tx=Array.from(n.getElementsByTagName('*')||[]).find((x)=>String(x.localName||x.nodeName||'').split(':').pop().toLowerCase()==='txbxcontent');
          const tbl=tx&&Array.from(tx.getElementsByTagName('*')||[]).find((x)=>String(x.localName||x.nodeName||'').split(':').pop().toLowerCase()==='tbl');
          if(tbl){
            const marker=mixerEncodeTable(mixerTablePayload(tbl));
            if(marker)s+=`
${marker}
`;
            return;
          }
          const ids=[];collectIds(n,ids); const hit=ids.map((id)=>media.get(id)).find((x)=>x&&x.dataUrl);
          if(hit)s+=mixerImageMarker(hit); return;
        }
        Array.from(n.childNodes||[]).forEach(walk);
      }
      Array.from(p.childNodes||[]).forEach(walk); return s;
    }
    function markedLetter(p){
      const runs=Array.from(p.getElementsByTagNameNS('*','r'));
      for(const r of runs){
        const txt=Array.from(r.getElementsByTagNameNS('*','t')).map((x)=>x.textContent||'').join('');
        const m=txt.match(/(?:^|\s)([A-D])\s*\.?/i); if(!m)continue;
        const rp=Array.from(r.childNodes||[]).find((x)=>x.nodeType===Node.ELEMENT_NODE&&String(x.localName||'').toLowerCase()==='rpr');
        if(!rp)continue; let marked=false;
        for(const x of Array.from(rp.childNodes||[])){
          const ln=String(x.localName||'').toLowerCase();
          if(ln==='u' && String(mixerAttr(x,'val')||'single').toLowerCase()!=='none') marked=true;
          if(ln==='color'){ const v=String(mixerAttr(x,'val')||'').replace('#','').toUpperCase(); if(['FF0000','00B050','92D050','0070C0','00B0F0'].includes(v))marked=true; }
        }
        if(marked)return m[1].toUpperCase();
      }
      return '';
    }
    function mixerTablePayload(tbl){
      const trs=Array.from(tbl.getElementsByTagNameNS('*','tr'));
      const rows=[];
      const cellMeta=[];
      const local=(node)=>String(node&&(node.localName||node.nodeName)||'').split(':').pop().toLowerCase();
      const direct=(node,name)=>Array.from(node&&node.childNodes||[]).filter((x)=>x&&x.nodeType===Node.ELEMENT_NODE&&local(x)===String(name||'').toLowerCase());
      const firstDesc=(node,name)=>Array.from(node&&node.getElementsByTagName?node.getElementsByTagName('*'):[]).find((x)=>local(x)===String(name||'').toLowerCase())||null;
      const attr=(node,name)=>String(mixerAttr(node,name)||'');

      trs.forEach((tr)=>{
        const row=[];
        const metaRow=[];
        Array.from(tr.getElementsByTagNameNS('*','tc')).forEach((tc)=>{
          const ps=direct(tc,'p');
          row.push(ps.map(richParagraph).join(' ').replace(/\s+/g,' ').trim());

          const p=ps[0]||null;
          const pPr=p?direct(p,'ppr')[0]||null:null;
          const jc=pPr?direct(pPr,'jc')[0]||null:null;
          const rawAlign=attr(jc,'val').toLowerCase();
          const align=['center','right','left','both','justify'].includes(rawAlign)
            ? (rawAlign==='both'?'justify':rawAlign) : 'left';

          const textRuns=p?Array.from(p.getElementsByTagNameNS('*','r')):[];
          let hasTextRun=false,allBold=true;
          textRuns.forEach((r)=>{
            const t=Array.from(r.getElementsByTagNameNS('*','t')).map((x)=>String(x.textContent||'')).join('');
            if(!t.trim())return;
            hasTextRun=true;
            const rPr=direct(r,'rpr')[0]||null;
            const b=rPr?direct(rPr,'b')[0]||null:null;
            const bVal=String(attr(b,'val')||'1').toLowerCase();
            if(!b||['0','false','off','none'].includes(bVal))allBold=false;
          });
          // Word có thể đặt Bold ở pPr/rPr của đoạn.
          const pRPr=pPr?direct(pPr,'rpr')[0]||null:null;
          const pBold=pRPr?direct(pRPr,'b')[0]||null:null;
          const paragraphBold=!!pBold && !['0','false','off','none'].includes(String(attr(pBold,'val')||'1').toLowerCase());
          const bold=paragraphBold || (hasTextRun&&allBold);

          const tcPr=direct(tc,'tcpr')[0]||null;
          const va=tcPr?direct(tcPr,'valign')[0]||null:null;
          const rawVa=attr(va,'val').toLowerCase();
          const vAlign=['top','center','bottom'].includes(rawVa)?rawVa:'center';
          metaRow.push({align,bold,vAlign});
        });
        if(row.some((c)=>c)){
          rows.push(row);
          cellMeta.push(metaRow);
        }
      });

      const tblPr=direct(tbl,'tblpr')[0]||null;
      const tblBorders=tblPr?direct(tblPr,'tblborders')[0]||null:null;
      const borderNames=['top','left','bottom','right','insideh','insidev'];
      let borderless=false;
      if(tblBorders){
        const vals=borderNames.map((name)=>{
          const node=direct(tblBorders,name)[0]||null;
          return String(attr(node,'val')||'').toLowerCase();
        }).filter(Boolean);
        borderless=vals.length>0&&vals.every((v)=>['none','nil'].includes(v));
      }
      const tableJc=tblPr?direct(tblPr,'jc')[0]||null:null;
      const rawTableAlign=attr(tableJc,'val').toLowerCase();
      const tableAlign=['center','right','left'].includes(rawTableAlign)?rawTableAlign:'left';

      return {rows,style:{borderless,tableAlign,cellMeta}};
    }

    function tableRows(tbl){
      return mixerTablePayload(tbl).rows;
    }
    const body=doc.getElementsByTagNameNS('*','body')[0]; const infos=[];
    for(const child of Array.from(body&&body.childNodes||[])){
      if(!child||child.nodeType!==Node.ELEMENT_NODE)continue; const ln=String(child.localName||'').toLowerCase();
      if(ln==='p'){ const val=richParagraph(child); if(val.trim())infos.push({text:val,markedLetter:markedLetter(child)}); }
      else if(ln==='tbl'){ const marker=mixerEncodeTable(mixerTablePayload(child)); if(marker)infos.push({text:marker,markedLetter:''}); }
    }
    const output=[]; let active=false,pending='',explicit=false;
    function flush(){ if(active&&!explicit&&pending)output.push(`Đáp án: ${pending}`); active=false;pending='';explicit=false; }
    for(const info of infos){
      const raw=String(info.text||''), line=raw.trim(); if(!line)continue;
      if(/^(?:Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VD|VDC|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i.test(line)){
        if(output.length){flush();if(output[output.length-1]!=='')output.push('');} active=true;output.push(raw);continue;
      }
      const ex=line.match(/^Đáp\s*án\s*:\s*([A-D])\s*$/i); if(ex){pending=ex[1].toUpperCase();explicit=true;output.push(`Đáp án: ${pending}`);continue;}
      if(/^((?:I|II|III|IV)\.|PHẦN\s+\w+)/i.test(line)){flush();if(output.length&&output[output.length-1]!=='')output.push('');output.push(raw);continue;}
      if(/^([A-D])\.\s*/i.test(line)&&info.markedLetter)pending=info.markedLetter;
      output.push(raw);
    }
    flush(); return output.join('\n').replace(/\n{3,}/g,'\n\n').trim();
  }

  function extractMixerRichBlocks(value) {
    const source=String(value||'').replace(/\r/g,'');
    const blocks=[];
    const lines=source.split('\n');
    const imgRe=/\[\[IMG:(data:[^|\]]+)(?:\|M:([0-9.]+):([0-9.]+):(-?\d+)(?:\|O:([A-Za-z0-9_-]+))?)?\]\]/ig;
    const ommlRe=/\[\[OMML:([A-Za-z0-9_-]+)\]\]/ig;
    const tableRe=/\[\[TABLE64:([A-Za-z0-9+/=]+)\]\]/ig;

    let lastTableToken='';
    lines.forEach((line)=>{
      const tokens=[];

      for(const m of line.matchAll(tableRe)){
        tokens.push({kind:'table',index:m.index,end:m.index+m[0].length,match:m});
      }
      for(const m of line.matchAll(imgRe)){
        tokens.push({kind:'image',index:m.index,end:m.index+m[0].length,match:m});
      }
      for(const m of line.matchAll(ommlRe)){
        tokens.push({kind:'equation',index:m.index,end:m.index+m[0].length,match:m});
      }
      tokens.sort((a,b)=>a.index-b.index);

      if(!tokens.length){
        if(line)blocks.push({type:'text',text:line,inline:false});
        lastTableToken='';
        return;
      }

      const only=tokens.length===1 && String(line).trim()===tokens[0].match[0];
      let pos=0;

      for(const token of tokens){
        if(token.index>pos){
          const before=line.slice(pos,token.index);
          if(before)blocks.push({type:'text',text:before,inline:true});
          /* Có chữ xen giữa thì TABLE64 sau đó không còn được coi là bản sao
             liền nhau của TABLE64 trước. */
          if(String(before).trim()) lastTableToken='';
        }

        if(token.kind==='table'){
          const rawToken=String(token.match[0]||'');
          const tableData=mixerDecodeTable(rawToken);

          /* File Word do MVIP sinh trước đây có thể chứa cùng một TABLE64 hai
             lần liên tiếp trong cùng đoạn. Không hiển thị bảng hai lần. */
          if(tableData && rawToken!==lastTableToken){
            blocks.push({
              type:'table',
              rows:tableData.rows,
              tableStyle:tableData.style||{},
              inline:false
            });
          }
          if(tableData) lastTableToken=rawToken;
        }else if(token.kind==='equation'){
          lastTableToken='';
          const key=String(token.match[1]||'');
          const asset=state.ommlAssets.get(key)||null;
          if(asset){
            blocks.push({
              type:'equation',
              id:key,
              xml:String(asset.xml||''),
              plainText:String(asset.plainText||''),
              inline:!(only&&asset.display),
              display:!!asset.display
            });
          }
        }else{
          lastTableToken='';
          const m=token.match;
          const src=m[1],fallback=state.richAssetMeta.get(src)||{};
          const meta={
            isMathType:!!m[2]||!!fallback.isMathType,
            widthPt:Number(m[2])||Number(fallback.widthPt)||0,
            heightPt:Number(m[3])||Number(fallback.heightPt)||0,
            positionHalfPt:Number(m[4]||fallback.positionHalfPt)||0,
            tex:String(fallback.tex||''),
            oleKey:String(m[5]||fallback.oleKey||'')
          };
          blocks.push({type:'image',src,inline:meta.isMathType?true:!only,meta});
        }
        pos=token.end;
      }

      if(pos<line.length){
        const tail=line.slice(pos);
        if(tail)blocks.push({type:'text',text:tail,inline:true});
        if(String(tail).trim()) lastTableToken='';
      }
    });
    return blocks;
  }


  function setStatus(message, type = '') {
    if (!els.status) return;
    els.status.textContent = message || '';
    els.status.className = 'exam-mixer-status' + (type ? ` ${type}` : '');
  }

  function currentForm() {
    const selected = document.querySelector('input[name="examMixerForm"]:checked');
    return selected ? String(selected.value || 'form1') : 'form1';
  }

  function mixerBaseForm(form = currentForm()) {
    const value=String(form||'form1');
    if(value==='form4')return 'form2';
    if(value==='form5')return 'form3';
    return value;
  }

  function mixerIsDirectForm(form = currentForm()) {
    return ['form1','form2','form3'].includes(String(form||''));
  }

  function mixerEssayLineCount() {
    const value=Math.floor(Number(els.essayLineCount && els.essayLineCount.value));
    return Math.max(1,Math.min(100,Number.isFinite(value)?value:3));
  }

  function syncFormFields() {
    const baseForm = mixerBaseForm();
    document.querySelectorAll('#examMixerHeaderFieldsCard .mixer-extended-field').forEach((node) => {
      node.hidden = baseForm === 'form2';
    });
    if (state.questions.length || state.versions.length) renderPreview();
  }

  function openGuideModal() {
    if (!els.guideModal) {
      openModal();
      return;
    }
    els.guideModal.hidden = false;
    els.guideModal.setAttribute('aria-hidden','false');
    requestAnimationFrame(() => {
      try { (els.guideOk || els.guideClose).focus({preventScroll:true}); } catch (_) {}
    });
  }

  function closeGuideModal() {
    if (!els.guideModal) return;
    els.guideModal.hidden = true;
    els.guideModal.setAttribute('aria-hidden','true');
  }

  function confirmGuideAndOpenMixer() {
    closeGuideModal();
    openModal();
  }

  function openModal() {
    els.modal.hidden = false;
    els.modal.setAttribute('aria-hidden','false');
    syncFormFields();
    requestAnimationFrame(() => { try { els.upload.focus({preventScroll:true}); } catch (_) {} });
  }
  function closeModal() {
    els.modal.hidden = true;
    els.modal.setAttribute('aria-hidden','true');
  }

  function normalizeDuration(value) {
    const raw = String(value || '').trim();
    if (!raw) return '';
    return /^\d+(?:[.,]\d+)?$/.test(raw) ? `${raw} phút` : raw;
  }

  function detectTypeHeader(line) {
    const s = String(line || '').replace(/\s+/g,' ').trim();
    if (!s) return '';
    const lower = s.toLowerCase();
    if (/^(?:ii\.|phần\s*ii\b|mục\s*ii\b)/i.test(s) || /trắc nghiệm[^\n]*(?:đúng\s*[-–—/]?\s*sai|đúng sai)/i.test(lower)) return 'true_false';
    if (/^(?:iii\.|phần\s*iii\b|mục\s*iii\b)/i.test(s) || /trả lời ngắn/i.test(lower)) return 'short';
    if (/^(?:iv\.|phần\s*iv\b|mục\s*iv\b)/i.test(s) || /tự luận/i.test(lower)) return 'essay';
    if (/^(?:i\.|phần\s*i\b|mục\s*i\b)/i.test(s) || /trắc nghiệm[^\n]*(?:lựa chọn|lua chon)/i.test(lower)) return 'single';
    return '';
  }

  function isQuestionStart(line) {
    return /^(?:Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VD|VDC|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]/i.test(String(line || '').trim());
  }

  function stripQuestionLabel(line) {
    return String(line || '').trim().replace(/^(?:Câu|Cau)\s*\d+\s*(?:[\(\[]\s*(?:NB|TH|VD|VDC|Nhận\s*biết|Thông\s*hiểu|Vận\s*dụng(?:\s*cao)?)\s*[\)\]])?\s*[\.:：]\s*/i,'').trim();
  }

  function parseMixerGroupMarker(line) {
    const m=String(line||'').trim().match(/^<\s*(#?)\s*m\s*([0-3])\s*>/i);
    return m ? {fixed:!!m[1],mode:parseInt(m[2],10)||0} : null;
  }

  function splitInlineChoices(line, letters) {
    const source = String(line || '');
    const upperSet = letters === 'ABCD';
    const re = upperSet ? /(^|\s)([A-D])\.\s*/g : /(^|\s)([a-d])[\.)]\s*/g;
    const hits = [];
    let m;
    while ((m = re.exec(source))) hits.push({ letter: m[2], start: m.index + m[1].length, bodyStart: re.lastIndex });
    if (hits.length < 2) return [];
    const expected = letters.split('');
    const got = hits.map((h) => upperSet ? h.letter.toUpperCase() : h.letter.toLowerCase());
    if (!got.every((letter, index) => expected[index] === letter)) return [];
    return hits.map((hit, index) => ({
      letter: upperSet ? hit.letter.toUpperCase() : hit.letter.toLowerCase(),
      text: source.slice(hit.bodyStart, index + 1 < hits.length ? hits[index + 1].start : source.length).trim(),
    }));
  }

  function parseChoiceBlock(lines, type) {
    const first = String(lines[0] || '');
    const prompt = [stripQuestionLabel(first)];
    const items = [];
    let current = null;
    let correct = type === 'true_false' ? [] : '';
    const itemLetters = type === 'true_false' ? 'abcd' : 'ABCD';
    const startRe = type === 'true_false' ? /^([a-d])[\.)]\s*(.*)$/i : /^([A-D])\.\s*(.*)$/i;
    const answerRe = /^Đáp\s*án\s*:\s*(.+)$/i;

    for (let i = 1; i < lines.length; i += 1) {
      const raw = String(lines[i] || '');
      const line = raw.trim();
      if (!line) continue;
      const ans = line.match(answerRe);
      if (ans) {
        if (type === 'true_false') {
          const tokens = String(ans[1] || '').replace(/[;,|]+/g,' ').split(/\s+/).filter(Boolean).map((v) => {
            const u = v.toUpperCase();
            const n = u.normalize ? u.normalize('NFD').replace(/[\u0300-\u036f]/g,'') : u;
            return (u === 'Đ' || u === 'D' || n === 'DUNG' || u === 'T' || n === 'TRUE') ? 'D' : (u === 'S' || n === 'SAI' || u === 'F' || n === 'FALSE' || ['A','B','C'].includes(u) ? 'A' : '');
          }).filter(Boolean);
          if (tokens.length === 4) correct = tokens;
        } else {
          const mm = String(ans[1] || '').toUpperCase().match(/[A-D]/);
          if (mm) correct = mm[0];
        }
        continue;
      }
      // Câu Đúng-Sai xuất từ MVIP thường dùng bảng Word 2 cột
      // "Nội dung | Đ hoặc S". Bộ đọc Word chuyển bảng thành TABLE64;
      // tách lại từng hàng a/b/c/d để trộn mà không làm mất bảng gốc.
      if (type === 'true_false' && /^\[\[TABLE64:/i.test(line)) {
        try {
          const core = window.mvipQuestionMixerCore;
          const blocks = core && typeof core.extractRichBlocks === 'function' ? core.extractRichBlocks(line) : [];
          const tableBlock = blocks.find((block) => block && block.type === 'table');
          const rows = Array.isArray(tableBlock && tableBlock.rows) ? tableBlock.rows : [];
          const parsedRows = [];
          const parsedAnswers = [];
          rows.forEach((row) => {
            const cells = Array.isArray(row) ? row : [];
            const firstCell = String(cells[0] || '').replace(/\s+/g,' ').trim();
            const statementMatch = firstCell.match(/^([a-d])[\.)]\s*(.*)$/i);
            if (!statementMatch) return;
            parsedRows.push({ letter:String(statementMatch[1]).toLowerCase(), text:String(statementMatch[2] || '').trim() });
            const answerCell = String(cells[1] || '').trim().toUpperCase();
            const normalized = answerCell.normalize ? answerCell.normalize('NFD').replace(/[\u0300-\u036f]/g,'') : answerCell;
            if (answerCell === 'Đ' || answerCell === 'D' || normalized === 'DUNG') parsedAnswers.push('D');
            else if (answerCell === 'S' || normalized === 'SAI') parsedAnswers.push('A');
            else parsedAnswers.push('');
          });
          if (parsedRows.length >= 2) {
            parsedRows.forEach((it) => items.push(it));
            current = items[items.length - 1] || null;
            if (parsedAnswers.length === parsedRows.length && parsedAnswers.every(Boolean)) correct = parsedAnswers;
            continue;
          }
        } catch (_) {}
      }
      const inline = splitInlineChoices(raw, itemLetters);
      if (inline.length >= 2) {
        inline.forEach((it) => items.push({ letter: it.letter, text: it.text }));
        current = items[items.length - 1] || null;
        continue;
      }
      const m = line.match(startRe);
      if (m) {
        current = { letter: type === 'true_false' ? String(m[1]).toLowerCase() : String(m[1]).toUpperCase(), text: String(m[2] || '').trim() };
        items.push(current);
        continue;
      }
      if (current) current.text = `${current.text}\n${raw}`.trim();
      else prompt.push(raw);
    }
    return {
      type,
      prompt: prompt.filter(Boolean).join('\n').trim(),
      options: items,
      correct,
    };
  }

  function parseSimpleBlock(lines, type) {
    const prompt = [stripQuestionLabel(lines[0] || '')];
    const answerLines = [];
    let inAnswer = false;

    for (let i = 1; i < lines.length; i += 1) {
      const raw = String(lines[i] || '');
      const line = raw.trim();
      if (!line) {
        if (inAnswer && answerLines.length) answerLines.push('');
        continue;
      }

      const answer = line.match(/^Đáp\s*án(?:\s+và\s+thang\s+điểm)?\s*:\s*(.*)$/i);
      if (answer) {
        inAnswer = true;
        if (type === 'essay') {
          // Giữ nguyên cả nhãn "Đáp án và thang điểm" để file đáp án Word
          // mang đầy đủ thang điểm giống đề gốc.
          answerLines.push(raw.trim());
        } else {
          // Trả lời ngắn chỉ cần giá trị đáp án.
          answerLines.push(String(answer[1] || '').trim());
        }
        continue;
      }

      if (inAnswer) {
        // Câu tự luận có thể có nhiều dòng lời giải/thang điểm; không được bỏ.
        answerLines.push(raw);
        continue;
      }

      if (type === 'short' && /^Trả\s*lời\s*:/i.test(line)) continue;
      prompt.push(raw);
    }

    return {
      type,
      prompt: prompt.filter(Boolean).join('\n').trim(),
      options: [],
      correct: '',
      answerText: answerLines.join('\n').replace(/\n{3,}/g, '\n\n').trim()
    };
  }

  function parseExamText(text) {
    const lines=String(text||'').replace(/\r/g,'').split('\n'); const questions=[]; let currentType='single',block=[];
    let groupCounter=1,currentRule={...defaultMixRule};
    const flush=()=>{if(!block.length)return;const parsed=currentType==='single'||currentType==='true_false'?parseChoiceBlock(block,currentType):parseSimpleBlock(block,currentType);if(parsed&&parsed.prompt){parsed.mixMode=currentRule.mode;parsed.fixedGroup=currentRule.fixed;parsed.mixGroup=currentRule.group;parsed.sourceOrder=questions.length+1;questions.push(parsed);}block=[];};
    let stop=false;
    lines.forEach((raw)=>{if(stop)return;const line=String(raw||''),trimmed=line.replace(/\s+/g,' ').trim();
      const globalAnswerHeading =
        /^ĐÁP\s*ÁN\s*$/i.test(trimmed)
        || /^ĐÁP\s*ÁN\s*[-–—]\s*(?:TRẮC\s*NGHIỆM|TỰ\s*LUẬN|HƯỚNG\s*DẪN\s*CHẤM)\s*$/i.test(trimmed);
      if(globalAnswerHeading || /^(?:MA\s*TRẬN\b|BẢNG\s*ĐẶC\s*TẢ\b)/i.test(trimmed)){
        flush();stop=true;return;
      }
      const marker=parseMixerGroupMarker(trimmed);if(marker){flush();groupCounter+=1;currentRule={mode:marker.mode,fixed:marker.fixed,group:groupCounter};return;}
      const heading=detectTypeHeader(line);if(heading&&!isQuestionStart(line)){flush();currentType=heading;return;}if(isQuestionStart(line)){flush();block=[line];return;}if(block.length)block.push(line);
    });flush();return questions;
  }

  function shuffleArray(items) {
    const arr = Array.isArray(items) ? items.slice() : [];
    for (let i = arr.length - 1; i > 0; i -= 1) {
      const j = Math.floor(Math.random() * (i + 1));
      [arr[i], arr[j]] = [arr[j], arr[i]];
    }
    return arr;
  }

  function cloneQuestion(q) {
    return {type:q.type,prompt:q.prompt,answerText:q.answerText||'',correct:Array.isArray(q.correct)?q.correct.slice():q.correct,options:(q.options||[]).map((o)=>({letter:o.letter,text:o.text})),mixMode:Number.isFinite(q.mixMode)?q.mixMode:3,fixedGroup:!!q.fixedGroup,mixGroup:q.mixGroup,sourceOrder:q.sourceOrder||0};
  }
  function shuffleMixerAnswers(q){
    if(!q||!Array.isArray(q.options)||q.options.length<2)return q;
    if(q.type==='single'){const old=String(q.correct||'').toUpperCase();const sh=shuffleArray(q.options.map((o)=>({text:o.text,oldLetter:String(o.letter||'').toUpperCase()})));q.options=sh.map((o,i)=>({letter:'ABCD'[i]||String.fromCharCode(65+i),text:o.text}));const h=sh.findIndex((o)=>o.oldLetter===old);q.correct=h>=0?('ABCD'[h]||''):'';}
    else if(q.type==='true_false'){const ans=Array.isArray(q.correct)?q.correct.slice():[];const sh=shuffleArray(q.options.map((o,i)=>({text:o.text,answer:ans[i]||''})));q.options=sh.map((o,i)=>({letter:'abcd'[i]||'',text:o.text}));q.correct=ans.length===q.options.length?sh.map((o)=>o.answer):[];}return q;
  }
  function buildMixedVersion(index){
    const out=[];typeOrder.forEach((type)=>{const src=state.questions.filter((q)=>q.type===type),groups=[];src.forEach((q)=>{const last=groups[groups.length-1];if(last&&last.groupId===q.mixGroup)last.questions.push(q);else groups.push({groupId:q.mixGroup,mode:Number.isFinite(q.mixMode)?q.mixMode:3,fixed:!!q.fixedGroup,questions:[q]});});
      const prepared=groups.map((g)=>{let qs=g.questions.map(cloneQuestion);if((g.mode===1||g.mode===3)&&qs.length>1)qs=shuffleArray(qs);if(g.mode===2||g.mode===3)qs.forEach(shuffleMixerAnswers);return{...g,questions:qs};});
      const movable=shuffleArray(prepared.filter((g)=>!g.fixed));let mi=0;prepared.map((g)=>g.fixed?g:movable[mi++]).forEach((g)=>g.questions.forEach((q)=>out.push(q)));
    });out.forEach((q,i)=>q.displayNumber=i+1);return{code:String(index+1).padStart(2,'0'),questions:out};
  }


  function mixerCleanTableCell(value){
    const raw=String(value==null?'':value).trim();
    return /^[.\u00b7]+$/.test(raw)?'':raw;
  }

  function mixerMathImageMeta(value){
    const m=String(value||'').match(/\|M:([0-9.]+):([0-9.]+):(-?\d+)/i);
    return m?{w:Number(m[1])||0,h:Number(m[2])||0,pos:Number(m[3])||0}:null;
  }

  function mixerVariationSign(value){
    const raw=mixerCleanTableCell(value);
    if(/^\s*[+\u002b]\s*$/.test(raw))return '+';
    if(/^\s*[-\u2212]\s*$/.test(raw))return '-';
    const meta=mixerMathImageMeta(raw);
    if(meta&&meta.w>0&&meta.h>0){
      return meta.w/meta.h>1.18?'-':'+';
    }
    return '';
  }

  function mixerIsVariationTableRows(rows){
    if(!Array.isArray(rows)||rows.length!==3)return false;
    const rr=rows.map((r)=>Array.isArray(r)?r:[]);
    if(rr.some((r)=>r.length<10))return false;
    const pointCols=[0,1,3,5,7,9],gapCols=[2,4,6,8];
    const enoughPoints=(r)=>pointCols.filter((i)=>mixerCleanTableCell(r[i])).length>=5;
    const enoughGaps=(r)=>gapCols.filter((i)=>!mixerCleanTableCell(r[i])).length>=3;
    if(!enoughPoints(rr[0])||!enoughPoints(rr[2])||!enoughGaps(rr[0])||!enoughGaps(rr[2]))return false;
    const signs=[2,4,6,8].map((i)=>mixerVariationSign(rr[1][i])).filter(Boolean);
    return signs.length>=3;
  }

  function mixerVariationInfo(rows){
    const rr=rows.map((r)=>Array.isArray(r)?r:[]);
    const xSlots=rr[0].slice(1,10).map(mixerCleanTableCell);
    const ypSlots=rr[1].slice(1,10).map(mixerCleanTableCell);
    const yValues=[1,3,5,7,9].map((col)=>mixerCleanTableCell(rr[2][col]));
    const signs=[2,4,6,8].map((col)=>mixerVariationSign(rr[1][col]));
    const positions=new Array(5).fill('top');
    if(signs[0])positions[0]=signs[0]==='+'?'bottom':'top';
    for(let i=1;i<4;i++){
      const left=signs[i-1],right=signs[i];
      if(left==='-'&&right==='+')positions[i]='bottom';
      else if(left==='+'&&right==='-')positions[i]='top';
      else if(left==='+')positions[i]='top';
      else if(left==='-')positions[i]='bottom';
    }
    if(signs[3])positions[4]=signs[3]==='+'?'top':'bottom';
    return {xSlots,ypSlots,yValues,signs,positions};
  }

  function mixerVariationTableHtml(rows){
    const info=mixerVariationInfo(rows);
    const grid=(values)=>`<div class="exam-mixer-bbt-grid">${values.map((v)=>`<div class="exam-mixer-bbt-slot">${v?richHtml(v):''}</div>`).join('')}</div>`;
    const vals=info.yValues.map((v,i)=>{
      const left=(i/4)*100;
      return `<span class="exam-mixer-bbt-val ${info.positions[i]}" style="left:${left}%">${v?richHtml(v):''}</span>`;
    }).join('');
    const lines=[];
    for(let i=0;i<4;i++){
      const x1=(i/4)*100,x2=((i+1)/4)*100;
      const y1=info.positions[i]==='bottom'?83:17;
      const y2=info.positions[i+1]==='bottom'?83:17;
      lines.push(`<line x1="${x1}" y1="${y1}" x2="${x2}" y2="${y2}" marker-end="url(#mixer-bbt-arrow)"></line>`);
    }
    return `<table class="exam-mixer-bbt">
      <tr class="bbt-x"><td class="bbt-label">${richHtml(rows[0][0]||'')}</td><td class="bbt-xdata">${grid(info.xSlots)}</td></tr>
      <tr class="bbt-yp"><td class="bbt-label">${richHtml(rows[1][0]||'')}</td><td class="bbt-ypdata">${grid(info.ypSlots)}</td></tr>
      <tr class="bbt-y"><td class="bbt-label">${richHtml(rows[2][0]||'')}</td><td class="bbt-ydata"><div class="exam-mixer-bbt-stage">
        <svg viewBox="0 0 100 100" preserveAspectRatio="none" aria-hidden="true"><defs><marker id="mixer-bbt-arrow" markerWidth="8" markerHeight="8" refX="6.5" refY="3.5" orient="auto" markerUnits="strokeWidth"><path d="M0,0 L7,3.5 L0,7 Z" fill="#111"></path></marker></defs>${lines.join('')}</svg>${vals}
      </div></td></tr>
    </table>`;
  }

  function richHtml(text) {
    const blocks=extractMixerRichBlocks(text||''); if(!blocks.length)return '';
    return blocks.map((b)=>{
      if(b.type==='text')return esc(b.text||'').replace(/\n/g,'<br>');
      if(b.type==='equation'){
        let html='';
        try{
          if(typeof cv7991PresenterEquationHtml==='function') html=cv7991PresenterEquationHtml({xml:String(b.xml||'')});
        }catch(_){html='';}
        if(!html)html=`<span>${esc(b.plainText||'[Công thức]')}</span>`;
        return b.inline
          ? `<span class="exam-mixer-word-equation">${html}</span>`
          : `<div class="exam-mixer-word-equation-block">${html}</div>`;
      }
      if(b.type==='image'){
        const meta=b.meta||{};
        if(meta.isMathType){
          const w=Math.max(1,(Number(meta.widthPt)||12)*4/3),h=Math.max(1,(Number(meta.heightPt)||12)*4/3),va=(Number(meta.positionHalfPt)||0)*2/3;
          return `<img class="exam-mixer-rich-img exam-mixer-inline-img exam-mixer-math-img" src="${esc(b.src)}" alt="Công thức" style="width:${w.toFixed(2)}px!important;height:${h.toFixed(2)}px!important;vertical-align:${va.toFixed(2)}px!important">`;
        }
        return `<img class="exam-mixer-rich-img${b.inline?' exam-mixer-inline-img':''}" src="${esc(b.src)}" alt="Hình minh họa">`;
      }
      if(b.type==='table'){
        if(mixerIsVariationTableRows(b.rows||[]))return mixerVariationTableHtml(b.rows||[]);
        const style=b.tableStyle||{};
        const meta=Array.isArray(style.cellMeta)?style.cellMeta:[];
        const tableClass=`exam-mixer-rich-table${style.borderless?' exam-mixer-table-no-borders':''}`;
        const tableStyle=style.tableAlign==='center'?'margin-left:auto;margin-right:auto;':(style.tableAlign==='right'?'margin-left:auto;margin-right:0;':'');
        return `<table class="${tableClass}" style="${tableStyle}">${(b.rows||[]).map((r,ri)=>`<tr>${(r||[]).map((c,ci)=>{
          const cm=(meta[ri]&&meta[ri][ci])||{};
          const align=['left','center','right','justify'].includes(cm.align)?cm.align:'left';
          const klass=cm.bold?' class="is-bold"':'';
          return `<td${klass} style="text-align:${align}">${richHtml(mixerCleanTableCell(c))}</td>`;
        }).join('')}</tr>`).join('')}</table>`;
      }
      return '';
    }).join('');
  }


  function headerPreview(version) {
    const form = currentForm();
    const baseForm = mixerBaseForm(form);
    const sourceMode = !!(version && version.isSource);
    const rawTitle = String(els.title.value || '').trim();
    const rawDistrict = String(els.district.value || '').trim();
    const rawSchool = String(els.school.value || '').trim();
    const rawSubject = String(els.subject.value || '').trim();
    const rawGrade = String(els.grade.value || '').trim();
    const rawYear = String(els.year.value || '').trim();
    const rawDuration = normalizeDuration(els.duration.value);

    const title = rawTitle || (sourceMode ? '' : '[Tên đề]');
    const district = rawDistrict || (sourceMode ? '' : '[Tên xã (Sở)]');
    const school = rawSchool || (sourceMode ? '' : '[Tên trường]');
    const subject = rawSubject || (sourceMode ? '' : '[tên môn]');
    const grade = rawGrade || (sourceMode ? '' : '[lớp]');
    const year = rawYear || (sourceMode ? '' : '[năm học]');
    const duration = rawDuration || (sourceMode ? '' : '[thời gian làm bài]');
    const code = sourceMode ? '...' : (version ? version.code : '01');
    if (baseForm === 'form2') {
      return `<div class="exam-mixer-header-simple"><div>${esc(title)}</div><div><b>MÃ ĐỀ ${esc(code)}</b></div></div><div class="exam-mixer-header-simple"><div>Họ và tên: ...............................................................</div><div>Lớp: ...............</div></div>`;
    }
    const timeLine = duration
      ? `Thời gian làm bài: ${esc(duration)}, không kể thời gian giao đề`
      : 'Thời gian làm bài:';
    const top = `<div class="exam-mixer-header-grid"><div class="exam-mixer-header-left"><div class="b">${esc(district)}</div><div>${esc(school)}</div></div><div class="exam-mixer-header-right"><div class="b">${esc(title)}</div><div class="b">MÔN: ${esc(subject)} ${esc(grade)}</div><div class="b">NĂM HỌC: ${esc(year)}</div><div class="exam-mixer-header-time">${timeLine}</div></div></div>`;
    if (baseForm === 'form3') return top + `<div class="exam-mixer-info-line"><div>Họ và tên: ...............................................................</div><div>Lớp: ...............</div><div><b>MÃ ĐỀ ${esc(code)}</b></div></div>`;
    return top + `<table class="exam-mixer-cut-table exam-mixer-form1-top-table"><colgroup><col style="width:51.5%"><col style="width:14.4%"><col style="width:34.1%"></colgroup><tr><td>Họ và tên học sinh:</td><td>Lớp:</td><td>Số báo danh:</td></tr><tr><td>Giám thị 1:</td><td colspan="2">Giám thị 2:</td></tr><tr><td><b>MÃ ĐỀ ${esc(code)}</b></td><td colspan="2">SỐ PHÁCH:</td></tr></table><div class="exam-mixer-form1-cut-gap"><span></span></div><table class="exam-mixer-cut-table exam-mixer-form1-bottom-number"><tr><td style="width:51.5%"><b>MÃ ĐỀ ${esc(code)}</b></td><td>SỐ PHÁCH:</td></tr></table><table class="exam-mixer-score-table exam-mixer-form1-bottom-table"><colgroup><col style="width:14.6%"><col style="width:20.3%"><col style="width:32.5%"><col style="width:32.6%"></colgroup><tr class="score-head-row"><td colspan="2"><b>Điểm</b></td><td>Người chấm thứ nhất</td><td>Người chấm thứ hai</td></tr><tr class="score-empty-row"><td>Bằng số</td><td>Bằng chữ</td><td></td><td></td></tr></table>`;
  }

  const MIXER_OPTION_LINE_WIDTH = 92;
  const MIXER_MIN_OPTION_GAP = 10;
  const MIXER_OPTION_ROW4_CELL_WIDTH = 20;
  const MIXER_OPTION_GRID2_CELL_WIDTH = 42;

  function mixerOptionTextLength(opt) {
    const labelLength = String(opt && opt.letter || '').length + 2;
    const blocks = extractMixerRichBlocks(String(opt && opt.text || ''));
    let length = labelLength;
    blocks.forEach((block) => {
      if (!block) return;
      if (block.type === 'text') {
        length += String(block.text || '').replace(/\s+/g, ' ').trim().length;
        return;
      }
      if (block.type === 'table') {
        length += 240;
        return;
      }
      if (block.type === 'equation') {
        const plain=String(block.plainText||'').replace(/\s+/g,'').trim();
        length += Math.max(4, Math.min(180, plain.length || 10));
        return;
      }
      if (block.type === 'image') {
        const meta = block.meta || {};
        if (meta.isMathType) {
          const widthPt = Number(meta.widthPt) || 0;
          length += Math.max(4, Math.min(240, Math.ceil((widthPt > 0 ? widthPt : 42) / 5.2)));
        } else {
          // Ảnh minh họa thật không nên nhét vào ô 2/4 cột.
          length += 240;
        }
      }
    });
    return length;
  }

  function mixerOptionLineFits(items, maxCellChars) {
    const row = Array.isArray(items) ? items : [];
    const total = row.reduce((sum, item) => sum + mixerOptionTextLength(item), 0);
    const noCellWillWrap = row.every((item) => mixerOptionTextLength(item) <= maxCellChars);
    return noCellWillWrap && total + Math.max(0, row.length - 1) * MIXER_MIN_OPTION_GAP <= MIXER_OPTION_LINE_WIDTH;
  }

  function mixerOptionLayoutMode(options) {
    const row = Array.isArray(options) ? options : [];
    if (row.length !== 4) return 'stack';
    if (mixerOptionLineFits(row, MIXER_OPTION_ROW4_CELL_WIDTH)) return 'row4';
    if (mixerOptionLineFits(row.slice(0, 2), MIXER_OPTION_GRID2_CELL_WIDTH)
      && mixerOptionLineFits(row.slice(2, 4), MIXER_OPTION_GRID2_CELL_WIDTH)) return 'grid2';
    return 'stack';
  }


  function mixerNormalizeEssayLineBreaks(value){
    let s=String(value==null?'':value).replace(/\r/g,'');
    if(!s.trim())return s;

    // Chuẩn hóa khoảng trắng quanh các xuống dòng có sẵn.
    s=s.replace(/[ \t]*\n[ \t]*/g,'\n');

    // Tách các ý a)/b)/c)... ngay cả khi dính sát sau dấu câu:
    // "8 kg.a) ..." -> "8 kg.\na) ..."
    // "Tính:a) ..." -> "Tính:\na) ..."
    s=s.replace(/(^|[\s.;:!?])([a-hA-H])\)\s*/gm,(match,boundary,letter,offset)=>{
      if(boundary==='\n' || offset===0){
        return `${boundary}${letter}) `;
      }
      // Nếu boundary chỉ là khoảng trắng, thay khoảng trắng bằng xuống dòng.
      if(/^\s+$/.test(boundary)){
        return `\n${letter}) `;
      }
      // Nếu boundary là dấu câu, giữ dấu câu rồi xuống dòng.
      return `${boundary}\n${letter}) `;
    });

    // Một số đề dùng a. / b. / c. thay cho a) / b) / c).
    s=s.replace(/(^|[\s;:!?])([a-hA-H])\.\s+(?=[A-ZÀ-Ỹ0-9])/gm,(match,boundary,letter,offset)=>{
      if(boundary==='\n' || offset===0){
        return `${boundary}${letter}. `;
      }
      if(/^\s+$/.test(boundary)){
        return `\n${letter}. `;
      }
      return `${boundary}\n${letter}. `;
    });

    return s
      .replace(/[ \t]+\n/g,'\n')
      .replace(/\n[ \t]+/g,'\n')
      .replace(/\n{3,}/g,'\n\n')
      .trim();
  }

  function mixerEssayRichHtml(value){
    const normalized=mixerNormalizeEssayLineBreaks(value);
    if(!normalized)return '';
    return normalized.split('\n').map((line)=>richHtml(line)).join('<br>');
  }

  async function mixerOoxmlEssayLines(value,prefixText,media){
    const normalized=mixerNormalizeEssayLineBreaks(value);
    const lines=normalized ? normalized.split('\n') : [];
    const out=[];
    if(!lines.length){
      if(prefixText)out.push(mixerOoxmlParagraph(mixerOoxmlRun(prefixText,{bold:true}),{after:40}));
      return out;
    }
    for(let i=0;i<lines.length;i++){
      const prefix=i===0?prefixText:'';
      const blocks=await mixerOoxmlRichBlocks(lines[i],prefix,media);
      if(blocks&&blocks.length)out.push(...blocks);
      else if(prefix)out.push(mixerOoxmlParagraph(mixerOoxmlRun(prefix,{bold:true}),{after:40}));
    }
    return out;
  }

  function renderQuestion(q) {
    const isEssay=q&&q.type==='essay';
    const promptSource=isEssay?mixerNormalizeEssayLineBreaks(q.prompt||''):(q.prompt||'');
    const promptHtml=isEssay?mixerEssayRichHtml(promptSource):richHtml(promptSource);
    const prompt = `<p class="exam-mixer-question-prompt"><b>Câu ${q.displayNumber}.</b> ${promptHtml}</p>`;
    if (q.type === 'single') {
      const optionMode = mixerOptionLayoutMode(q.options || []);
      return `<div class="exam-mixer-question">${prompt}<div class="exam-mixer-options mode-${optionMode}">${(q.options||[]).map((o)=>`<div class="exam-mixer-option"><b>${esc(o.letter)}.</b> ${richHtml(o.text || '')}</div>`).join('')}</div></div>`;
    }
    if (q.type === 'true_false') {
      if(!mixerIsDirectForm()){
        return `<div class="exam-mixer-question">${prompt}<div class="exam-mixer-tf-plain">${(q.options||[]).map((o)=>`<p style="margin:3px 0"><b>${esc(o.letter)})</b> ${richHtml(o.text||'')}</p>`).join('')}</div></div>`;
      }
      return `<div class="exam-mixer-question">${prompt}<table class="exam-mixer-tf-table"><tr><th>Nội dung</th><th style="width:90px">Đ hoặc S</th></tr>${(q.options||[]).map((o)=>`<tr><td><b>${esc(o.letter)})</b> ${richHtml(o.text||'')}</td><td></td></tr>`).join('')}</table></div>`;
    }
    if (q.type === 'short') {
      return mixerIsDirectForm()
        ? `<div class="exam-mixer-question">${prompt}<div>Trả lời: ........................................</div></div>`
        : `<div class="exam-mixer-question">${prompt}</div>`;
    }
    return `<div class="exam-mixer-question">${prompt}</div>`;
  }

  function sourcePreviewVersion() {
    return {
      code: '',
      isSource: true,
      questions: (state.questions || []).map((q, index) => {
        const cloned = cloneQuestion(q);
        cloned.displayNumber = Number(q && q.sourceOrder) || index + 1;
        return cloned;
      })
    };
  }


  function mixerEssayWorkPreviewHtml(version){
    if(!mixerIsDirectForm())return '';
    const questions=Array.isArray(version&&version.questions)?version.questions:[];
    if(!questions.some((q)=>q&&q.type==='essay'))return '';
    const count=mixerEssayLineCount();
    return `<div class="exam-mixer-essay-work"><div class="exam-mixer-essay-work-title">BÀI LÀM PHẦN TỰ LUẬN</div>${Array.from({length:count},()=>'<div class="exam-mixer-essay-work-line"></div>').join('')}</div>`;
  }

  function renderPreview() {
    let version = null;

    if (state.versions.length) {
      const code = String(els.previewCode.value || state.versions[0].code);
      version = state.versions.find((v)=>v.code===code) || state.versions[0];
    } else if (state.questions.length) {
      version = sourcePreviewVersion();
    }

    if (!version) {
      els.preview.innerHTML = '<div class="exam-mixer-empty">Tải đề Word lên để xem trước đề gốc tại đây.</div>';
      return;
    }

    let lastType = '';
    let body = '';
    version.questions.forEach((q) => {
      if (q.type !== lastType) {
        body += `<div class="exam-mixer-section">${esc(typeLabel[q.type] || '')}</div>`;
        lastType = q.type;
      }
      body += renderQuestion(q);
    });
    els.preview.innerHTML = `<div class="exam-mixer-page">${headerPreview(version)}${body}${mixerEssayWorkPreviewHtml(version)}</div>`;
  }

  async function loadFile(file) {
    if (!file) return;
    const core = window.mvipQuestionMixerCore;
    if (!core || typeof core.readWordArrayBuffer !== 'function') {
      setStatus('Bộ đọc Word chưa sẵn sàng. Bạn tải lại trang rồi thử lại.', 'err');
      return;
    }
    state.file = file;
    state.versions = [];
    els.download.disabled = true;
    if (els.answer) els.answer.disabled = true;
    if (els.answerMenu) els.answerMenu.hidden = true;
    els.previewCode.disabled = true;
    els.previewCode.innerHTML = '<option value="">Chưa có mã đề</option>';
    els.fileName.textContent = file.name || 'file Word';
    setStatus('Đang đọc đề Word...', '');
    try {
      const buffer = await file.arrayBuffer();
      state.sourceText = /\.(?:docx|docm)$/i.test(file.name || '') ? await readMixerDocx(buffer) : await core.readWordArrayBuffer(buffer, file.name || 'de.docx');
      state.questions = parseExamText(state.sourceText);
      const counts = Object.fromEntries(typeOrder.map((t)=>[t,state.questions.filter((q)=>q.type===t).length]));
      if (!state.questions.length) throw new Error('Không nhận diện được câu hỏi có dạng “Câu 1.”, “Câu 2.”... trong file.');
      const summary = [`${state.questions.length} câu`, counts.single ? `${counts.single} nhiều lựa chọn` : '', counts.true_false ? `${counts.true_false} đúng-sai` : '', counts.short ? `${counts.short} trả lời ngắn` : '', counts.essay ? `${counts.essay} tự luận` : ''].filter(Boolean).join(' · ');
      const groupIds=Array.from(new Set(state.questions.map((q)=>q.mixGroup))).length; const fixedGroups=Array.from(new Set(state.questions.filter((q)=>q.fixedGroup).map((q)=>q.mixGroup))).length;
      const ommlCount=state.ommlAssets.size;
      els.previewCode.innerHTML = '<option value="source">Đề gốc</option>';
      els.previewCode.disabled = true;
      setStatus(`Đã đọc ${summary}. Đề gốc đang hiển thị ở vùng xem trước. Bạn có thể nhập Thông tin trên đề để xem cập nhật trực tiếp, sau đó chọn số mã đề và bấm Trộn đề.`, 'ok');
      renderPreview();
    } catch (err) {
      state.questions = [];
      state.versions = [];
      els.previewCode.disabled = true;
      els.previewCode.innerHTML = '<option value="">Chưa có đề</option>';
      setStatus(err && err.message ? err.message : 'Không đọc được đề Word.', 'err');
      renderPreview();
    }
  }

  function generate() {
    if (!state.questions.length) { setStatus('Bạn cần tải đề Word lên trước.', 'err'); return; }
    const count = Math.max(1, Math.min(100, parseInt(String(els.count.value || '1'),10) || 1));
    els.count.value = String(count);
    state.versions = Array.from({length:count},(_,i)=>buildMixedVersion(i));
    els.previewCode.innerHTML = state.versions.map((v)=>`<option value="${esc(v.code)}">Mã đề ${esc(v.code)}</option>`).join('');
    els.previewCode.disabled = false;
    els.download.disabled = false;
    if (els.answer) els.answer.disabled = false;
    renderPreview();
    const groupIds=Array.from(new Set(state.questions.map((q)=>q.mixGroup))).length;
    setStatus(`Đã trộn ${state.questions.length} câu theo ${groupIds} nhóm thành ${count} mã đề. Bạn có thể xem trước từng mã và tải xuống.`, 'ok');
  }

  async function convertRichToCv(text, assets) {
    const core = window.mvipQuestionMixerCore;
    if (!core || typeof core.extractRichBlocks !== 'function') return String(text || '');
    const blocks = extractMixerRichBlocks(text || '');
    const out = [];
    for (const block of blocks) {
      if (!block) continue;
      if (block.type === 'text') { out.push(String(block.text || '')); continue; }
      if (block.type === 'table') {
        const id = `mix_tbl_${++state.assetSeq}`;
        assets.tableMap[id] = { rows:(Array.isArray(block.rows)?block.rows:[]).map((row)=>(row||[]).map((cell)=>({text:String(cell||''),gridSpan:1}))) };
        out.push(`[[CV7991_TBL:${id}]]`);
        continue;
      }
      if (block.type === 'image' && block.src) {
        let id = assets.imageIds.get(block.src);
        if (!id) {
          id = `mix_img_${++state.assetSeq}`;
          assets.imageIds.set(block.src,id);
          const data = core.dataUrlToUint8Array(block.src);
          const mime = (String(block.src).match(/^data:([^;,]+)/i)||[])[1] || 'image/png';
          let dims = {width:320,height:200};
          try { dims = await core.getImageDimensionsFromDataUrl(block.src); } catch (_) {}
          const fitted = core.fitImageSize(dims.width,dims.height,420,260);
          assets.imageMap[id] = {
            data,
            mimeType:mime,
            path:`word/media/${id}.${/jpe?g/i.test(mime)?'jpg':(/gif/i.test(mime)?'gif':(/bmp/i.test(mime)?'bmp':'png'))}`,
            width:dims.width,
            height:dims.height,
            naturalWidthPt:dims.width*0.75,
            naturalHeightPt:dims.height*0.75,
            sourceDisplayWidthPt:fitted.width*0.75,
            sourceDisplayHeightPt:fitted.height*0.75,
          };
        }
        out.push(`[[CV7991_IMG:${id}]]`);
      }
    }
    return out.join('\n').trim();
  }

  async function buildCvVersions() {
    const assets = { imageMap:{}, tableMap:{}, imageIds:new Map() };
    state.assetSeq = 0;
    const cvVersions = [];
    for (const version of state.versions) {
      const questions = [];
      for (const q of version.questions) {
        const prompt = await convertRichToCv(q.prompt || '', assets);
        const format = formatMap[q.type] || 'mc';
        const cvq = { format, text:`Câu ${q.displayNumber}. ${prompt}`.trim(), answer:'', printAnswer:'', level:'', chapter:'', unit:'' };
        if (q.type === 'single') {
          cvq.printOptions = [];
          for (const o of (q.options||[])) cvq.printOptions.push({letter:String(o.letter||'').toUpperCase(), text:await convertRichToCv(o.text||'',assets)});
          cvq.text += '\n' + cvq.printOptions.map((o)=>`${o.letter}. ${o.text}`).join('\n');
          cvq.answer = String(q.correct || '').toUpperCase();
          cvq.printAnswer = cvq.answer;
        } else if (q.type === 'true_false') {
          cvq.printStatements = [];
          for (const o of (q.options||[])) cvq.printStatements.push({letter:String(o.letter||'').toLowerCase(), text:await convertRichToCv(o.text||'',assets)});
          cvq.text += '\n' + cvq.printStatements.map((o)=>`${o.letter}) ${o.text}`).join('\n');
          const tfAnswers = Array.isArray(q.correct) ? q.correct.slice(0,4) : [];
          cvq.printAnswerItems = tfAnswers;
          cvq.mixerUnknownAnswer = tfAnswers.length !== 4 || tfAnswers.some((value)=>!String(value||'').trim());
          if (!cvq.mixerUnknownAnswer) cvq.answer = tfAnswers.map((value,index)=>`${'abcd'[index]}:${String(value||'').toUpperCase()==='D'?'Đ':'S'}`).join('; ');
        } else if (q.type === 'short') {
          cvq.answer = String(q.answerText || '').trim();
          cvq.printShortAnswer = cvq.answer;
        } else if (q.type === 'essay') {
          cvq.answer = String(q.answerText || '').trim();
        }
        questions.push(cvq);
      }
      const subject = String(els.subject.value || '').trim();
      const grade = String(els.grade.value || '').trim();
      const mon = [subject,grade].filter(Boolean).join('-') || 'Môn-';
      cvVersions.push({ mon, code:version.code, studentId:'placeholder', studentName:'...............................................................', classLabel:'...............', questions });
    }
    return { versions:cvVersions, imageMap:assets.imageMap, tableMap:assets.tableMap };
  }

  function mixerSafeFileName(value, fallback = 'de_tron_MVIP') {
    return (String(value || fallback).trim() || fallback)
      .replace(/[\\/:*?"<>|]+/g, '_')
      .replace(/\s+/g, ' ')
      .replace(/[. ]+$/g, '')
      .slice(0, 120) || fallback;
  }

  function mixerNoBorder(d) {
    const nil = { style: d.BorderStyle.NONE, size: 0, color: 'FFFFFF' };
    return { top:nil, bottom:nil, left:nil, right:nil, insideHorizontal:nil, insideVertical:nil };
  }

  function mixerGridBorder(d) {
    const line = { style: d.BorderStyle.SINGLE, size: 4, color: '000000' };
    return { top:line, bottom:line, left:line, right:line, insideHorizontal:line, insideVertical:line };
  }

  function mixerRun(d, text, extra = {}) {
    return new d.TextRun(Object.assign({ text:String(text == null ? '' : text), font:'Times New Roman', size:24 }, extra || {}));
  }

  function mixerParagraph(d, text, extra = {}) {
    const opts = Object.assign({ spacing:{ before:0, after:0, line:240 } }, extra || {});
    if (Array.isArray(text)) opts.children = text;
    else opts.children = [mixerRun(d, text)];
    return new d.Paragraph(opts);
  }

  function mixerCell(d, children, extra = {}) {
    const opts = Object.assign({
      margins:{ top:40, bottom:40, left:80, right:80 },
      verticalAlign:d.VerticalAlign.CENTER,
      children:Array.isArray(children) ? children : [mixerParagraph(d, String(children || ''))],
    }, extra || {});
    return new d.TableCell(opts);
  }

  function mixerPlainTextFromRich(value) {
    const core = window.mvipQuestionMixerCore;
    if (!core || typeof core.extractRichBlocks !== 'function') return String(value || '').trim();
    try {
      return extractMixerRichBlocks(value || '').map((block) => {
        if (!block) return '';
        if (block.type === 'text') return String(block.text || '');
        if (block.type === 'equation') return String(block.plainText || '');
        if (block.type === 'table') return (Array.isArray(block.rows) ? block.rows : []).map((row)=>(row||[]).join(' | ')).join(' ; ');
        return '';
      }).filter(Boolean).join(' ').replace(/\s+/g,' ').trim();
    } catch (_) {
      return String(value || '').trim();
    }
  }

  async function mixerRichBlocksToDocx(d, value, prefixRuns = []) {
    const core = window.mvipQuestionMixerCore;
    const blocks = extractMixerRichBlocks(value || '');
    const out = [];
    let firstTextDone = false;
    for (const block of blocks) {
      if (!block) continue;
      if (block.type === 'text') {
        const txt = String(block.text || '').trim();
        if (!txt && (!prefixRuns.length || firstTextDone)) continue;
        const runs = [];
        if (!firstTextDone && prefixRuns.length) runs.push(...prefixRuns);
        if (txt) runs.push(mixerRun(d, txt));
        out.push(mixerParagraph(d, runs, { spacing:{ before:0, after:40, line:240 } }));
        firstTextDone = true;
        continue;
      }
      if (!firstTextDone && prefixRuns.length) {
        out.push(mixerParagraph(d, prefixRuns, { spacing:{ before:0, after:40, line:240 } }));
        firstTextDone = true;
      }
      if (block.type === 'image' && block.src && d.ImageRun) {
        try {
          const data = core && typeof core.dataUrlToUint8Array === 'function' ? core.dataUrlToUint8Array(block.src) : null;
          if (data && data.length) {
            let dims = { width:360, height:220 };
            if (core && typeof core.getImageDimensionsFromDataUrl === 'function') {
              try { dims = await core.getImageDimensionsFromDataUrl(block.src); } catch (_) {}
            }
            const fit = core && typeof core.fitImageSize === 'function' ? core.fitImageSize(dims.width,dims.height,480,300) : dims;
            out.push(new d.Paragraph({
              alignment:d.AlignmentType.CENTER,
              spacing:{ before:40, after:60, line:240 },
              children:[new d.ImageRun({ data, transformation:{ width:Math.max(1,Math.round(fit.width)), height:Math.max(1,Math.round(fit.height)) } })],
            }));
          }
        } catch (error) {
          console.warn('Không chèn được ảnh vào Word Trộn đề:', error);
        }
        continue;
      }
      if (block.type === 'table') {
        const rows = Array.isArray(block.rows) ? block.rows : [];
        if (rows.length) {
          out.push(new d.Table({
            width:{ size:100, type:d.WidthType.PERCENTAGE },
            borders:mixerGridBorder(d),
            rows:rows.map((row)=>new d.TableRow({ children:(row||[]).map((cell)=>mixerCell(d,[mixerParagraph(d,String(cell||''))])) })),
          }));
          out.push(mixerParagraph(d,''));
        }
      }
    }
    if (!out.length) out.push(mixerParagraph(d, prefixRuns.length ? prefixRuns : [mixerRun(d,'')]));
    return out;
  }

  function mixerHeaderDocx(d, version) {
    const form = currentForm();
    const title = String(els.title.value || '').trim() || '[Tên đề]';
    const district = String(els.district.value || '').trim() || '[Tên xã (Sở)]';
    const school = String(els.school.value || '').trim() || '[Tên trường]';
    const subject = String(els.subject.value || '').trim() || '[tên môn]';
    const grade = String(els.grade.value || '').trim() || '[lớp]';
    const year = String(els.year.value || '').trim() || '[năm học]';
    const duration = normalizeDuration(els.duration.value) || '[thời gian làm bài]';
    const code = String(version && version.code || '01');
    const noBorder = mixerNoBorder(d);
    const result = [];
    if (form === 'form2') {
      result.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:noBorder, rows:[
        new d.TableRow({ children:[
          mixerCell(d,[mixerParagraph(d,title)],{ borders:noBorder, width:{size:70,type:d.WidthType.PERCENTAGE} }),
          mixerCell(d,[mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${code}`,{bold:true})],{alignment:d.AlignmentType.RIGHT})],{ borders:noBorder, width:{size:30,type:d.WidthType.PERCENTAGE} }),
        ]}),
        new d.TableRow({ children:[
          mixerCell(d,[mixerParagraph(d,'Họ và tên: ...............................................................')],{borders:noBorder}),
          mixerCell(d,[mixerParagraph(d,'Lớp: ...............',{alignment:d.AlignmentType.RIGHT})],{borders:noBorder}),
        ]}),
      ] }));
      result.push(mixerParagraph(d,''));
      return result;
    }
    result.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:noBorder, rows:[new d.TableRow({ children:[
      mixerCell(d,[mixerParagraph(d,[mixerRun(d,district,{bold:true})],{alignment:d.AlignmentType.CENTER}),mixerParagraph(d,school,{alignment:d.AlignmentType.CENTER})],{borders:noBorder,width:{size:42,type:d.WidthType.PERCENTAGE}}),
      mixerCell(d,[
        mixerParagraph(d,[mixerRun(d,title,{bold:true})],{alignment:d.AlignmentType.CENTER}),
        mixerParagraph(d,[mixerRun(d,`MÔN: ${subject} ${grade}`,{bold:true})],{alignment:d.AlignmentType.CENTER}),
        mixerParagraph(d,[mixerRun(d,`NĂM HỌC: ${year}`,{bold:true})],{alignment:d.AlignmentType.CENTER}),
        mixerParagraph(d,[mixerRun(d,`Thời gian làm bài: ${duration}, không kể thời gian giao đề`,{italics:true})],{alignment:d.AlignmentType.CENTER}),
      ],{borders:noBorder,width:{size:58,type:d.WidthType.PERCENTAGE}}),
    ]})] }));
    if (form === 'form3') {
      result.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:noBorder, rows:[new d.TableRow({children:[
        mixerCell(d,[mixerParagraph(d,'Họ và tên: ...............................................................')],{borders:noBorder}),
        mixerCell(d,[mixerParagraph(d,'Lớp: ...............')],{borders:noBorder}),
        mixerCell(d,[mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${code}`,{bold:true})])],{borders:noBorder}),
      ]})] }));
      result.push(mixerParagraph(d,''));
      return result;
    }
    const grid = mixerGridBorder(d);
    result.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:grid, rows:[
      new d.TableRow({children:[
        mixerCell(d,[mixerParagraph(d,'Họ và tên học sinh:')],{width:{size:50,type:d.WidthType.PERCENTAGE}}),
        mixerCell(d,[mixerParagraph(d,'Lớp:')],{width:{size:20,type:d.WidthType.PERCENTAGE}}),
        mixerCell(d,[mixerParagraph(d,'Số báo danh:')],{width:{size:30,type:d.WidthType.PERCENTAGE}}),
      ]}),
      new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,'Giám thị 1:')]),mixerCell(d,[mixerParagraph(d,'Giám thị 2:')],{columnSpan:2})]}),
      new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${code}`,{bold:true})])]),mixerCell(d,[mixerParagraph(d,'SỐ PHÁCH:')],{columnSpan:2})]}),
      new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${code}`,{bold:true})])]),mixerCell(d,[mixerParagraph(d,'SỐ PHÁCH:')],{columnSpan:2})]}),
    ] }));
    result.push(mixerParagraph(d,'✂  ------------------------------------------------------------------------------',{alignment:d.AlignmentType.CENTER,spacing:{before:80,after:80,line:240}}));
    result.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:grid, rows:[
      new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,[mixerRun(d,'Điểm',{bold:true})],{alignment:d.AlignmentType.CENTER})],{columnSpan:2}),mixerCell(d,[mixerParagraph(d,[mixerRun(d,'Người chấm thứ nhất',{bold:true})],{alignment:d.AlignmentType.CENTER})]),mixerCell(d,[mixerParagraph(d,[mixerRun(d,'Người chấm thứ hai',{bold:true})],{alignment:d.AlignmentType.CENTER})])]}),
      new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,'Bằng số')]),mixerCell(d,[mixerParagraph(d,'Bằng chữ')]),mixerCell(d,[mixerParagraph(d,'')]),mixerCell(d,[mixerParagraph(d,'')])]}),
    ] }));
    result.push(mixerParagraph(d,''));
    return result;
  }

  async function mixerQuestionDocx(d, q) {
    const out = [];
    const promptBlocks = await mixerRichBlocksToDocx(d, q.prompt || '', [mixerRun(d,`Câu ${q.displayNumber}. `,{bold:true})]);
    out.push(...promptBlocks);
    if (q.type === 'single') {
      const mode = mixerOptionLayoutMode(q.options || []);
      if (mode === 'stack' || (q.options || []).length !== 4) {
        for (const o of (q.options || [])) {
          const blocks = await mixerRichBlocksToDocx(d, o.text || '', [mixerRun(d,`${String(o.letter||'').toUpperCase()}. `,{bold:true})]);
          out.push(...blocks);
        }
      } else {
        const colCount = mode === 'row4' ? 4 : 2;
        const sourceRows = mode === 'row4' ? [q.options] : [q.options.slice(0,2), q.options.slice(2,4)];
        const rows = [];
        for (const row of sourceRows) {
          const cells = [];
          for (let i = 0; i < colCount; i += 1) {
            const o = row[i];
            const blocks = o ? await mixerRichBlocksToDocx(d, o.text || '', [mixerRun(d,`${String(o.letter||'').toUpperCase()}. `,{bold:true})]) : [mixerParagraph(d,'')];
            cells.push(mixerCell(d, blocks, { borders:mixerNoBorder(d), width:{size:Math.floor(100/colCount),type:d.WidthType.PERCENTAGE} }));
          }
          rows.push(new d.TableRow({children:cells}));
        }
        out.push(new d.Table({width:{size:100,type:d.WidthType.PERCENTAGE},borders:mixerNoBorder(d),rows}));
      }
    } else if (q.type === 'true_false') {
      const rows = [new d.TableRow({children:[mixerCell(d,[mixerParagraph(d,[mixerRun(d,'Nội dung',{bold:true})],{alignment:d.AlignmentType.CENTER})]),mixerCell(d,[mixerParagraph(d,[mixerRun(d,'Đ hoặc S',{bold:true})],{alignment:d.AlignmentType.CENTER})],{width:{size:16,type:d.WidthType.PERCENTAGE}})]})];
      (q.options || []).forEach((o)=>rows.push(new d.TableRow({children:[
        mixerCell(d,[mixerParagraph(d,[mixerRun(d,`${String(o.letter||'').toLowerCase()}) `,{bold:true}),mixerRun(d,mixerPlainTextFromRich(o.text||''))])]),
        mixerCell(d,[mixerParagraph(d,'')],{width:{size:16,type:d.WidthType.PERCENTAGE}}),
      ]})));
      out.push(new d.Table({ width:{size:100,type:d.WidthType.PERCENTAGE}, borders:mixerGridBorder(d), rows }));
      out.push(mixerParagraph(d,''));
    } else if (q.type === 'short') {
      out.push(mixerParagraph(d,'Trả lời: ........................................'));
    }
    return out;
  }

  function mixerAnswerDocx(d) {
    const out = [];
    const title = String(els.title.value || '').trim() || 'Đề trộn';
    out.push(new d.Paragraph({ pageBreakBefore:true, alignment:d.AlignmentType.CENTER, spacing:{before:0,after:100,line:240}, children:[mixerRun(d,`ĐÁP ÁN ${title}`,{bold:true,size:28})] }));
    out.push(mixerParagraph(d,[mixerRun(d,'A. TRẮC NGHIỆM',{bold:true})],{spacing:{before:0,after:60,line:240}}));
    state.versions.forEach((version)=>{
      out.push(mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${version.code}`,{bold:true})],{spacing:{before:80,after:20,line:240}}));
      const lines=[];
      version.questions.forEach((q)=>{
        if (q.type === 'single') lines.push(`Câu ${q.displayNumber}: ${String(q.correct||'-')}`);
        else if (q.type === 'true_false') {
          const vals=Array.isArray(q.correct)?q.correct:[];
          lines.push(`Câu ${q.displayNumber}: ${['a','b','c','d'].map((s,i)=>`${s}. ${String(vals[i]||'-')}`).join('; ')}`);
        } else if (q.type === 'short') lines.push(`Câu ${q.displayNumber}: ${String(q.answerText||'-')}`);
      });
      for (let i=0;i<lines.length;i+=8) out.push(mixerParagraph(d,lines.slice(i,i+8).join('; ')));
    });
    out.push(mixerParagraph(d,[mixerRun(d,'B. TỰ LUẬN',{bold:true})],{spacing:{before:160,after:60,line:240}}));
    state.versions.forEach((version)=>{
      const essays=version.questions.filter((q)=>q.type==='essay');
      if (!essays.length) return;
      out.push(mixerParagraph(d,[mixerRun(d,`MÃ ĐỀ ${version.code}`,{bold:true})],{spacing:{before:80,after:20,line:240}}));
      essays.forEach((q)=>{
        out.push(mixerParagraph(d,[mixerRun(d,`Câu ${q.displayNumber}`,{bold:true})],{spacing:{before:40,after:0,line:240}}));
        const ans=String(q.answerText||'').trim();
        out.push(mixerParagraph(d,ans || 'Chưa có đáp án.'));
      });
    });
    return out;
  }

  function mixerOoxmlEsc(value) {
    return String(value == null ? '' : value)
      .replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;')
      .replace(/"/g,'&quot;').replace(/'/g,'&apos;');
  }

  function mixerOoxmlRun(text, opts = {}) {
    const props = [];
    props.push('<w:rFonts w:ascii="Times New Roman" w:hAnsi="Times New Roman" w:eastAsia="Times New Roman"/>');
    props.push(`<w:sz w:val="${Math.max(16, Math.round(Number(opts.size || 24)))}"/>`);
    props.push(`<w:szCs w:val="${Math.max(16, Math.round(Number(opts.size || 24)))}"/>`);
    if (opts.bold) props.push('<w:b/>');
    if (opts.italics) props.push('<w:i/>');
    const clean = String(text == null ? '' : text);
    return `<w:r><w:rPr>${props.join('')}</w:rPr><w:t xml:space="preserve">${mixerOoxmlEsc(clean)}</w:t></w:r>`;
  }

  function mixerOoxmlParagraph(content = '', opts = {}) {
    const pPr = [];
    if (opts.align) pPr.push(`<w:jc w:val="${mixerOoxmlEsc(opts.align)}"/>`);
    const before = Math.max(0, Math.round(Number(opts.before || 0)));
    const after = Math.max(0, Math.round(Number(opts.after || 0)));
    const line = Math.max(0, Math.round(Number(opts.line || 240)));
    pPr.push(`<w:spacing w:before="${before}" w:after="${after}" w:line="${line}" w:lineRule="auto"/>`);
    if (opts.keepNext) pPr.push('<w:keepNext/>');
    if (opts.pageBreakBefore) pPr.push('<w:pageBreakBefore/>');
    const body = Array.isArray(content) ? content.join('') : String(content || '');
    return `<w:p><w:pPr>${pPr.join('')}</w:pPr>${body}</w:p>`;
  }

  function mixerOoxmlPageBreak() {
    return '<w:p><w:r><w:br w:type="page"/></w:r></w:p>';
  }

  function mixerOoxmlCell(content, opts = {}) {
    const tcPr = [];
    if (opts.width) tcPr.push(`<w:tcW w:w="${Math.max(1, Math.round(opts.width))}" w:type="dxa"/>`);
    if (opts.colSpan && Number(opts.colSpan) > 1) tcPr.push(`<w:gridSpan w:val="${Math.round(Number(opts.colSpan))}"/>`);
    const valign=String(opts.vAlign||'center').toLowerCase();
    tcPr.push(`<w:vAlign w:val="${['top','bottom','center'].includes(valign)?valign:'center'}"/>`);
    const my=Number.isFinite(Number(opts.marginY))?Math.max(0,Math.round(Number(opts.marginY))):40;
    const mx=Number.isFinite(Number(opts.marginX))?Math.max(0,Math.round(Number(opts.marginX))):80;
    tcPr.push(`<w:tcMar><w:top w:w="${my}" w:type="dxa"/><w:bottom w:w="${my}" w:type="dxa"/><w:left w:w="${mx}" w:type="dxa"/><w:right w:w="${mx}" w:type="dxa"/></w:tcMar>`);
    if(opts.borders){
      const edge=(name)=>{
        const v=opts.borders[name];
        if(!v)return `<w:${name} w:val="nil"/>`;
        return `<w:${name} w:val="single" w:sz="${Math.max(2,Math.round(Number(v.size||4)))}" w:color="${mixerOoxmlEsc(v.color||'000000')}"/>`;
      };
      tcPr.push(`<w:tcBorders>${edge('top')}${edge('left')}${edge('bottom')}${edge('right')}</w:tcBorders>`);
    }
    const body = Array.isArray(content) ? content.join('') : String(content || mixerOoxmlParagraph(''));
    return `<w:tc><w:tcPr>${tcPr.join('')}</w:tcPr>${body || mixerOoxmlParagraph('')}</w:tc>`;
  }

  function mixerOoxmlTable(rows, opts = {}) {
    const borders = opts.noBorder
      ? '<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/><w:insideH w:val="nil"/><w:insideV w:val="nil"/></w:tblBorders>'
      : '<w:tblBorders><w:top w:val="single" w:sz="4" w:color="000000"/><w:left w:val="single" w:sz="4" w:color="000000"/><w:bottom w:val="single" w:sz="4" w:color="000000"/><w:right w:val="single" w:sz="4" w:color="000000"/><w:insideH w:val="single" w:sz="4" w:color="000000"/><w:insideV w:val="single" w:sz="4" w:color="000000"/></w:tblBorders>';
    const grid = Array.isArray(opts.gridWidths) && opts.gridWidths.length
      ? `<w:tblGrid>${opts.gridWidths.map((w)=>`<w:gridCol w:w="${Math.max(1,Math.round(w))}"/>`).join('')}</w:tblGrid>` : '';
    const rowHeights=Array.isArray(opts.rowHeights)?opts.rowHeights:[];
    const rowXml = (rows || []).map((row,rowIndex)=>{
      const h=Math.max(0,Math.round(Number(rowHeights[rowIndex])||0));
      const trPr=h>0?`<w:trPr><w:trHeight w:val="${h}" w:hRule="atLeast"/></w:trPr>`:'';
      return `<w:tr>${trPr}${(row || []).join('')}</w:tr>`;
    }).join('');
    const align=['left','center','right'].includes(String(opts.align||'').toLowerCase())
      ? `<w:jc w:val="${String(opts.align).toLowerCase()}"/>` : '';
    return `<w:tbl><w:tblPr><w:tblW w:w="${Math.max(1,Math.round(opts.width || 10466))}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${align}${borders}</w:tblPr>${grid}${rowXml}</w:tbl>`;
  }

  function mixerOoxmlMediaTypeFromDataUrl(src) {
    const mime = ((String(src || '').match(/^data:([^;,]+)/i) || [])[1] || 'image/png').toLowerCase();
    if (/jpe?g/.test(mime)) return { ext:'jpg', contentType:'image/jpeg' };
    if (/gif/.test(mime)) return { ext:'gif', contentType:'image/gif' };
    if (/bmp/.test(mime)) return { ext:'bmp', contentType:'image/bmp' };
    return { ext:'png', contentType:'image/png' };
  }


  function mixerOoxmlExtFromPath(path, fallback='wmf'){
    const m=String(path||'').toLowerCase().match(/\.([a-z0-9]+)$/i);
    return m?m[1]:fallback;
  }

  function mixerOoxmlEditableMathTypeRun(block, media){
    const meta=block&&block.meta||{};
    const key=String(meta.oleKey||'');
    const asset=key&&state.oleAssets.get(key);
    if(!asset||!asset.oleData||!asset.previewData||!asset.objectXml)return '';

    media.oleNo=(media.oleNo||0)+1;
    const no=media.oleNo;
    const previewExt=mixerOoxmlExtFromPath(asset.previewPath,'wmf');
    const previewName=`mathPreview${no}.${previewExt}`;
    const oleName=`oleObject${no}.bin`;
    const previewRid=`rIdMathPreview${no}`;
    const oleRid=`rIdMathOle${no}`;

    media.files.push({
      filename:previewName,
      data:asset.previewData,
      contentType:previewExt==='wmf'?'image/x-wmf':(previewExt==='emf'?'image/x-emf':String(asset.previewMime||'image/x-wmf')),
      ext:previewExt
    });
    media.embeddings=media.embeddings||[];
    media.embeddings.push({filename:oleName,data:asset.oleData});
    media.rels.push(`<Relationship Id="${previewRid}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${previewName}"/>`);
    media.rels.push(`<Relationship Id="${oleRid}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/oleObject" Target="embeddings/${oleName}"/>`);

    let objectXml=String(asset.objectXml||'');
    if(asset.previewRid)objectXml=objectXml.replace(new RegExp(`r:id=["']${String(asset.previewRid).replace(/[.*+?^${}()|[\]\\]/g,'\\$&')}["']`,'g'),`r:id="${previewRid}"`);
    if(asset.oleRid)objectXml=objectXml.replace(new RegExp(`r:id=["']${String(asset.oleRid).replace(/[.*+?^${}()|[\]\\]/g,'\\$&')}["']`,'g'),`r:id="${oleRid}"`);

    // Each copied object must have its own VML/Office identifiers because the
    // same source formula can appear in many shuffled versions.
    const shapeId=`_x0000_i${2000+no}`;
    const typeId=`_x0000_t${7500+no}`;
    objectXml=objectXml.replace(/id=["']_x0000_t\d+["']/g,`id="${typeId}"`);
    objectXml=objectXml.replace(/type=["']#_x0000_t\d+["']/g,`type="#${typeId}"`);
    objectXml=objectXml.replace(/id=["']_x0000_i\d+["']/g,`id="${shapeId}"`);
    objectXml=objectXml.replace(/ShapeID=["']_x0000_i\d+["']/g,`ShapeID="${shapeId}"`);
    objectXml=objectXml.replace(/ObjectID=["'][^"']+["']/g,`ObjectID="_${1900000000+no}"`);
    objectXml=objectXml.replace(/\s+w14:anchorId=["'][^"']+["']/g,'');

    const pos=Number.isFinite(Number(meta.positionHalfPt))?Math.round(Number(meta.positionHalfPt)):0;
    const rPr=pos?`<w:rPr><w:position w:val="${pos}"/></w:rPr>`:'';
    return `<w:r>${rPr}${objectXml}</w:r>`;
  }

  async function mixerOoxmlImageRun(block, media, inlineFormula=false) {
    const meta0=block&&block.meta||{};
    if(meta0.isMathType&&meta0.oleKey){
      const editable=mixerOoxmlEditableMathTypeRun(block,media);
      if(editable)return editable;
    }
    const core=window.mvipQuestionMixerCore;if(!block||!block.src||!core)return '';
    let data;try{data=core.dataUrlToUint8Array(block.src);}catch(_){return '';}if(!data||!data.length)return '';
    const info=mixerOoxmlMediaTypeFromDataUrl(block.src),imageNo=++media.imageNo,rid=`rIdImage${imageNo}`,filename=`image${imageNo}.${info.ext}`;
    let dims={width:360,height:220};try{dims=await core.getImageDimensionsFromDataUrl(block.src);}catch(_){}
    const meta=block.meta||{}; let width=dims.width,height=dims.height;
    if(meta.isMathType && Number(meta.widthPt)>0 && Number(meta.heightPt)>0){width=Number(meta.widthPt)*4/3;height=Number(meta.heightPt)*4/3;}
    else if(inlineFormula){const maxH=24,maxW=360,scale=Math.min(1,maxH/Math.max(1,height),maxW/Math.max(1,width));width=Math.max(6,width*scale);height=Math.max(6,height*scale);}
    else{const fit=core.fitImageSize(width,height,480,300)||dims;width=fit.width;height=fit.height;}
    const cx=meta.isMathType&&Number(meta.widthPt)>0?Math.max(1,Math.round(Number(meta.widthPt)*12700)):Math.max(1,Math.round(width))*9525;
    const cy=meta.isMathType&&Number(meta.heightPt)>0?Math.max(1,Math.round(Number(meta.heightPt)*12700)):Math.max(1,Math.round(height))*9525;
    media.files.push({filename,data,contentType:info.contentType,ext:info.ext});media.rels.push(`<Relationship Id="${rid}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${filename}"/>`);
    const position=meta.isMathType&&Number.isFinite(Number(meta.positionHalfPt))&&Number(meta.positionHalfPt)!==0?`<w:rPr><w:position w:val="${Math.round(Number(meta.positionHalfPt))}"/></w:rPr>`:'';
    return `<w:r>${position}<w:drawing><wp:inline distT="0" distB="0" distL="0" distR="0"><wp:extent cx="${cx}" cy="${cy}"/><wp:docPr id="${1000+imageNo}" name="Picture ${imageNo}"/><wp:cNvGraphicFramePr><a:graphicFrameLocks noChangeAspect="1"/></wp:cNvGraphicFramePr><a:graphic><a:graphicData uri="http://schemas.openxmlformats.org/drawingml/2006/picture"><pic:pic><pic:nvPicPr><pic:cNvPr id="${1000+imageNo}" name="${filename}"/><pic:cNvPicPr/></pic:nvPicPr><pic:blipFill><a:blip r:embed="${rid}"/><a:stretch><a:fillRect/></a:stretch></pic:blipFill><pic:spPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="${cx}" cy="${cy}"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></pic:spPr></pic:pic></a:graphicData></a:graphic></wp:inline></w:drawing></w:r>`;
  }


  async function mixerOoxmlImageParagraph(block, media) {
    const core = window.mvipQuestionMixerCore;
    if (!block || !block.src || !core || typeof core.dataUrlToUint8Array !== 'function') return '';
    let data;
    try { data = core.dataUrlToUint8Array(block.src); } catch (_) { return ''; }
    if (!data || !data.length) return '';
    const info = mixerOoxmlMediaTypeFromDataUrl(block.src);
    const imageNo = ++media.imageNo;
    const rid = `rIdImage${imageNo}`;
    const filename = `image${imageNo}.${info.ext}`;
    let dims = { width:360, height:220 };
    if (typeof core.getImageDimensionsFromDataUrl === 'function') {
      try { dims = await core.getImageDimensionsFromDataUrl(block.src); } catch (_) {}
    }
    let fit = dims;
    if (typeof core.fitImageSize === 'function') {
      try { fit = core.fitImageSize(dims.width,dims.height,480,300) || dims; } catch (_) {}
    }
    const widthPx = Math.max(1, Math.round(Number(fit.width || dims.width || 360)));
    const heightPx = Math.max(1, Math.round(Number(fit.height || dims.height || 220)));
    const cx = widthPx * 9525;
    const cy = heightPx * 9525;
    media.files.push({ filename, data, contentType:info.contentType, ext:info.ext });
    media.rels.push(`<Relationship Id="${rid}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/${filename}"/>`);
    const drawing = `<w:r><w:drawing><wp:inline distT="0" distB="0" distL="0" distR="0"><wp:extent cx="${cx}" cy="${cy}"/><wp:docPr id="${1000+imageNo}" name="Picture ${imageNo}"/><wp:cNvGraphicFramePr><a:graphicFrameLocks noChangeAspect="1"/></wp:cNvGraphicFramePr><a:graphic><a:graphicData uri="http://schemas.openxmlformats.org/drawingml/2006/picture"><pic:pic><pic:nvPicPr><pic:cNvPr id="${1000+imageNo}" name="${filename}"/><pic:cNvPicPr/></pic:nvPicPr><pic:blipFill><a:blip r:embed="${rid}"/><a:stretch><a:fillRect/></a:stretch></pic:blipFill><pic:spPr><a:xfrm><a:off x="0" y="0"/><a:ext cx="${cx}" cy="${cy}"/></a:xfrm><a:prstGeom prst="rect"><a:avLst/></a:prstGeom></pic:spPr></pic:pic></a:graphicData></a:graphic></wp:inline></w:drawing></w:r>`;
    return mixerOoxmlParagraph(drawing,{align:'center',before:40,after:60});
  }

  function mixerOoxmlEquationXml(block){
    let xml=String(block&&block.xml||'').trim();
    if(!xml)return '';
    // Quan hệ namespace được khai báo ở w:document; bỏ XML declaration nếu có.
    xml=xml.replace(/^<\?xml[^>]*\?>\s*/i,'');
    if(!/^<m:oMath(?:Para)?\b/i.test(xml))return '';
    return xml;
  }


  async function mixerOoxmlRichCell(value,media,align='center'){
    const clean=mixerCleanTableCell(value);
    if(!clean)return [mixerOoxmlParagraph(mixerOoxmlRun(''),{align,after:0,line:220})];
    const blocks=await mixerOoxmlRichBlocks(clean,'',media);
    return blocks&&blocks.length?blocks:[mixerOoxmlParagraph(mixerOoxmlRun(''),{align,after:0,line:220})];
  }

  async function mixerOoxmlVariationTable(rows,media){
    const info=mixerVariationInfo(rows);
    const total=10466,labelW=620,dataW=total-labelW;
    const slotW=Math.floor(dataW/9);
    const slotWidths=Array.from({length:9},(_,i)=>i===8?dataW-slotW*8:slotW);
    const no={top:null,left:null,bottom:null,right:null};
    const bottom={top:null,left:null,bottom:{size:4},right:null};
    const right={top:null,left:null,bottom:null,right:{size:4}};
    const rightBottom={top:null,left:null,bottom:{size:4},right:{size:4}};

    const makeSlotTable=async(values)=>{
      const cells=[];
      for(let i=0;i<9;i++){
        cells.push(mixerOoxmlCell(await mixerOoxmlRichCell(values[i]||'',media,'center'),{
          width:slotWidths[i],borders:no,marginX:0,marginY:0
        }));
      }
      return mixerOoxmlTable([cells],{noBorder:true,gridWidths:slotWidths,width:dataW});
    };

    const xTable=await makeSlotTable(info.xSlots);
    const ypTable=await makeSlotTable(info.ypSlots);

    const topCells=[],midCells=[],bottomCells=[];
    for(let i=0;i<9;i++){
      const point=i%2===0;
      if(point){
        const pi=i/2;
        const isTop=info.positions[pi]!=='bottom';
        topCells.push(mixerOoxmlCell(isTop?await mixerOoxmlRichCell(info.yValues[pi]||'',media,'center'):mixerOoxmlParagraph(''),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
        midCells.push(mixerOoxmlCell(mixerOoxmlParagraph(''),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
        bottomCells.push(mixerOoxmlCell(!isTop?await mixerOoxmlRichCell(info.yValues[pi]||'',media,'center'):mixerOoxmlParagraph(''),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
      }else{
        const interval=(i-1)/2;
        const from=info.positions[interval],to=info.positions[interval+1];
        const arrow=from==='top'&&to==='bottom'?'↘':(from==='bottom'&&to==='top'?'↗':'→');
        topCells.push(mixerOoxmlCell(mixerOoxmlParagraph(''),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
        midCells.push(mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(arrow,{size:34}),{align:'center',after:0,line:260}),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
        bottomCells.push(mixerOoxmlCell(mixerOoxmlParagraph(''),{width:slotWidths[i],borders:no,marginX:0,marginY:0}));
      }
    }
    const yTable=mixerOoxmlTable([topCells,midCells,bottomCells],{noBorder:true,gridWidths:slotWidths,width:dataW});

    const label0=await mixerOoxmlRichCell(rows[0][0]||'',media,'center');
    const label1=await mixerOoxmlRichCell(rows[1][0]||'',media,'center');
    const label2=await mixerOoxmlRichCell(rows[2][0]||'',media,'center');

    const outer=[
      [
        mixerOoxmlCell(label0,{width:labelW,borders:rightBottom,marginX:0,marginY:0}),
        mixerOoxmlCell(xTable,{width:dataW,borders:bottom,marginX:0,marginY:0})
      ],
      [
        mixerOoxmlCell(label1,{width:labelW,borders:rightBottom,marginX:0,marginY:0}),
        mixerOoxmlCell(ypTable,{width:dataW,borders:bottom,marginX:0,marginY:0})
      ],
      [
        mixerOoxmlCell(label2,{width:labelW,borders:right,marginX:0,marginY:0}),
        mixerOoxmlCell(yTable,{width:dataW,borders:no,marginX:0,marginY:0})
      ]
    ];
    return mixerOoxmlTable(outer,{noBorder:true,gridWidths:[labelW,dataW],width:total});
  }

  async function mixerOoxmlRichBlocks(value,prefixText,media){
    const blocks=extractMixerRichBlocks(value||''),out=[];let runs=[];if(prefixText)runs.push(mixerOoxmlRun(prefixText,{bold:true}));
    const flush=()=>{if(runs.length){out.push(mixerOoxmlParagraph(runs,{after:40}));runs=[];}};
    for(const b of blocks){if(!b)continue;if(b.type==='text'){const parts=String(b.text||'').split('\n');for(let i=0;i<parts.length;i++){if(parts[i])runs.push(mixerOoxmlRun(parts[i]));if(i<parts.length-1)flush();}}
      else if(b.type==='equation'&&b.inline){const eq=mixerOoxmlEquationXml(b);if(eq)runs.push(eq);}
      else if(b.type==='equation'){flush();const eq=mixerOoxmlEquationXml(b);if(eq)out.push(mixerOoxmlParagraph(eq,{align:'center',before:20,after:40}));}
      else if(b.type==='image'&&b.inline){const r=await mixerOoxmlImageRun(b,media,true);if(r)runs.push(r);}
      else if(b.type==='image'){flush();const img=await mixerOoxmlImageParagraph(b,media);if(img)out.push(img);}
      else if(b.type==='table'){
        flush();
        const rows=Array.isArray(b.rows)?b.rows:[];
        if(rows.length){
          if(mixerIsVariationTableRows(rows)){
            out.push(await mixerOoxmlVariationTable(rows,media));
            out.push(mixerOoxmlParagraph(''));
          }else{
            const cc=Math.max(1,...rows.map((r)=>r.length)),ws=Array.from({length:cc},()=>Math.floor(10466/cc));
            const rowXml=[];
            const tableStyle=b.tableStyle||{};
            const cellMeta=Array.isArray(tableStyle.cellMeta)?tableStyle.cellMeta:[];
            for(let ri=0;ri<rows.length;ri++){
              const r=rows[ri]||[];
              const cells=[];
              for(let i=0;i<ws.length;i++){
                const value=mixerCleanTableCell(r[i]||'');
                const cm=(cellMeta[ri]&&cellMeta[ri][i])||{};
                const align=['left','center','right','justify'].includes(cm.align)?cm.align:'left';
                let contentXml='';
                if(value && !/\[\[(?:IMG|OMML|TABLE64):/i.test(value)){
                  contentXml=mixerOoxmlParagraph(
                    mixerOoxmlRun(value,{bold:!!cm.bold}),
                    {align,after:0,line:240}
                  );
                }else{
                  const rich=await mixerOoxmlRichBlocks(value,'',media);
                  contentXml=(rich&&rich.length?rich:[mixerOoxmlParagraph(mixerOoxmlRun(''),{align,after:0,line:240})]).join('');
                }
                cells.push(mixerOoxmlCell(contentXml,{
                  width:ws[i],
                  vAlign:['top','center','bottom'].includes(cm.vAlign)?cm.vAlign:'center'
                }));
              }
              rowXml.push(cells);
            }
            out.push(mixerOoxmlTable(rowXml,{
              gridWidths:ws,
              noBorder:!!tableStyle.borderless,
              align:['left','center','right'].includes(tableStyle.tableAlign)?tableStyle.tableAlign:'left'
            }));
            out.push(mixerOoxmlParagraph(''));
          }
        }
      }
    }flush();if(!out.length)out.push(mixerOoxmlParagraph(prefixText?mixerOoxmlRun(prefixText,{bold:true}):mixerOoxmlRun('')));return out;
  }

  function mixerOoxmlForm1CutSpacer(){
    const width=10466, half=284;
    const borders='<w:tblBorders><w:top w:val="nil"/><w:left w:val="nil"/><w:right w:val="nil"/><w:bottom w:val="nil"/><w:insideH w:val="dashed" w:sz="5" w:color="555555"/><w:insideV w:val="nil"/></w:tblBorders>';
    const row=`<w:tr><w:trPr><w:trHeight w:val="${half}" w:hRule="exact"/><w:cantSplit/></w:trPr><w:tc><w:tcPr><w:tcW w:w="${width}" w:type="dxa"/><w:tcMar><w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/><w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/></w:tcMar></w:tcPr><w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p></w:tc></w:tr>`;
    return `<w:tbl><w:tblPr><w:tblW w:w="${width}" w:type="dxa"/><w:tblLayout w:type="fixed"/>${borders}</w:tblPr><w:tblGrid><w:gridCol w:w="${width}"/></w:tblGrid>${row}${row}</w:tbl>`;
  }


  const MIXER_FORM1_PAGE_USABLE_DXA = 16838 - 720 - 720;
  const MIXER_FORM1_COVER_ESTIMATE_DXA = 5700;
  const MIXER_FORM1_BACK_BOX_HEIGHT_DXA = 2510; // khoảng 4,4 cm sau khi hạ nét cắt 4 mm
  const MIXER_FORM1_BACK_BOX_GAP_DXA = 660; // 180 cũ + khoảng 2 dòng (2 x 240 twip)
  const MIXER_FORM1_BOTTOM_SAFETY_DXA = 180;

  function mixerOoxmlForm1BackPhachBox(){
    const width=10466;
    const h=MIXER_FORM1_BACK_BOX_HEIGHT_DXA;
    return `<w:tbl>
      <w:tblPr>
        <w:tblW w:w="${width}" w:type="dxa"/>
        <w:tblLayout w:type="fixed"/>
        <w:tblBorders>
          <w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/>
          <w:insideH w:val="nil"/><w:insideV w:val="nil"/>
        </w:tblBorders>
      </w:tblPr>
      <w:tblGrid><w:gridCol w:w="${width}"/></w:tblGrid>
      <w:tr>
        <w:trPr><w:trHeight w:val="${h}" w:hRule="exact"/><w:cantSplit/></w:trPr>
        <w:tc>
          <w:tcPr>
            <w:tcW w:w="${width}" w:type="dxa"/>
            <w:tcBorders>
              <w:top w:val="single" w:sz="6" w:color="000000"/>
              <w:left w:val="single" w:sz="6" w:color="000000"/>
              <w:bottom w:val="single" w:sz="6" w:color="000000"/>
              <w:right w:val="single" w:sz="6" w:color="000000"/>
              <w:tl2br w:val="single" w:sz="6" w:color="000000"/>
              <w:tr2bl w:val="single" w:sz="6" w:color="000000"/>
            </w:tcBorders>
            <w:vAlign w:val="center"/>
            <w:tcMar>
              <w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/>
              <w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/>
            </w:tcMar>
          </w:tcPr>
          <w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p>
        </w:tc>
      </w:tr>
    </w:tbl>`;
  }

  function mixerOoxmlForm1BackPhachWithBlock(blockXml){
    const width=10466;
    return `<w:tbl>
      <w:tblPr>
        <w:tblW w:w="${width}" w:type="dxa"/>
        <w:tblLayout w:type="fixed"/>
        <w:tblBorders>
          <w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/>
          <w:insideH w:val="nil"/><w:insideV w:val="nil"/>
        </w:tblBorders>
      </w:tblPr>
      <w:tblGrid><w:gridCol w:w="${width}"/></w:tblGrid>
      <w:tr>
        <w:trPr><w:cantSplit/></w:trPr>
        <w:tc>
          <w:tcPr>
            <w:tcW w:w="${width}" w:type="dxa"/>
            <w:tcMar>
              <w:top w:w="0" w:type="dxa"/><w:bottom w:w="0" w:type="dxa"/>
              <w:left w:w="0" w:type="dxa"/><w:right w:w="0" w:type="dxa"/>
            </w:tcMar>
            <w:tcBorders>
              <w:top w:val="nil"/><w:left w:val="nil"/><w:bottom w:val="nil"/><w:right w:val="nil"/>
            </w:tcBorders>
          </w:tcPr>
          ${mixerOoxmlForm1BackPhachBox()}
          ${mixerOoxmlParagraph('',{before:0,after:0,line:MIXER_FORM1_BACK_BOX_GAP_DXA})}
          ${blockXml||''}
          <w:p><w:pPr><w:spacing w:before="0" w:after="0" w:line="1" w:lineRule="exact"/></w:pPr></w:p>
        </w:tc>
      </w:tr>
    </w:tbl>`;
  }

  function mixerEstimateRichHeight(value, charsPerLine=92){
    const s=String(value||'')
      .replace(/\[\[(?:IMG|OMML|TABLE64):[^\]]+\]\]/g,'XXXXXXXXXXXX')
      .replace(/\s+/g,' ')
      .trim();
    const lines=Math.max(1,Math.ceil(Math.max(1,s.length)/Math.max(24,charsPerLine)));
    return 110 + lines*250;
  }

  function mixerEstimateQuestionHeight(q){
    if(!q)return 650;
    let h=mixerEstimateRichHeight(q.prompt||'',88)+80;
    if(q.type==='single'){
      const opts=Array.isArray(q.options)?q.options:[];
      const mode=mixerOptionLayoutMode(opts);
      if(mode==='row4')h+=360;
      else if(mode==='grid2')h+=680;
      else h+=Math.max(1,opts.length||4)*310;
    }else if(q.type==='true_false'){
      const opts=Array.isArray(q.options)?q.options:[];
      h+=420;
      opts.forEach((o)=>{h+=mixerEstimateRichHeight(o&&o.text||'',76);});
    }else if(q.type==='short'){
      h+=420;
    }else if(q.type==='essay'){
      const normalized=typeof mixerNormalizeEssayLineBreaks==='function'
        ? mixerNormalizeEssayLineBreaks(q.prompt||'')
        : String(q.prompt||'');
      const lines=normalized.split('\n').filter((line)=>line.trim());
      h=Math.max(h,280+Math.max(1,lines.length)*320);
    }
    return Math.max(560,h);
  }

  function mixerOoxmlHeader(version) {
    const form = currentForm();
    const baseForm = mixerBaseForm(form);
    const title = String(els.title.value || '').trim() || '[Tên đề]';
    const district = String(els.district.value || '').trim() || '[Tên xã (Sở)]';
    const school = String(els.school.value || '').trim() || '[Tên trường]';
    const subject = String(els.subject.value || '').trim() || '[tên môn]';
    const grade = String(els.grade.value || '').trim() || '[lớp]';
    const year = String(els.year.value || '').trim() || '[năm học]';
    const duration = normalizeDuration(els.duration.value) || '[thời gian làm bài]';
    const code = String(version && version.code || '01');
    const parts = [];
    if (baseForm === 'form2') {
      const widths=[7300,3166];
      parts.push(mixerOoxmlTable([
        [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(title)),{width:widths[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${code}`,{bold:true}),{align:'right'}),{width:widths[1]})],
        [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Họ và tên: ...............................................................')),{width:widths[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Lớp: ...............'),{align:'right'}),{width:widths[1]})],
      ],{noBorder:true,gridWidths:widths}));
      parts.push(mixerOoxmlParagraph(''));
      return parts;
    }
    const widths=[4400,6066];
    parts.push(mixerOoxmlTable([[
      mixerOoxmlCell([
        mixerOoxmlParagraph(mixerOoxmlRun(district,{bold:true}),{align:'center',before:0,after:0,line:220}),
        mixerOoxmlParagraph(mixerOoxmlRun(school),{align:'center',before:0,after:0,line:220})
      ],{width:widths[0],vAlign:'top',marginY:0}),
      mixerOoxmlCell([
        mixerOoxmlParagraph(mixerOoxmlRun(title,{bold:true}),{align:'center'}),
        mixerOoxmlParagraph(mixerOoxmlRun(`MÔN: ${subject} ${grade}`,{bold:true}),{align:'center'}),
        mixerOoxmlParagraph(mixerOoxmlRun(`NĂM HỌC: ${year}`,{bold:true}),{align:'center'}),
        mixerOoxmlParagraph(mixerOoxmlRun(`Thời gian làm bài: ${duration}, không kể thời gian giao đề`,{italics:true}),{align:'center'})
      ],{width:widths[1]})
    ]],{noBorder:true,gridWidths:widths}));
    if (baseForm === 'form3') {
      const w=[5200,2600,2666];
      parts.push(mixerOoxmlTable([[
        mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Họ và tên: ...............................................................')),{width:w[0]}),
        mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Lớp: ...............')),{width:w[1]}),
        mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${code}`,{bold:true})),{width:w[2]})
      ]],{noBorder:true,gridWidths:w}));
      parts.push(mixerOoxmlParagraph(''));
      return parts;
    }
    const topGrid=[5387,1507,3572];
    parts.push(mixerOoxmlTable([
      [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Họ và tên học sinh:')),{width:topGrid[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Lớp:')),{width:topGrid[1]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Số báo danh:')),{width:topGrid[2]})],
      [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Giám thị 1:')),{width:topGrid[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Giám thị 2:')),{width:topGrid[1]+topGrid[2],colSpan:2})],
      [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${code}`,{bold:true,size:28})),{width:topGrid[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('SỐ PHÁCH:')),{width:topGrid[1]+topGrid[2],colSpan:2})],
    ],{gridWidths:topGrid,rowHeights:[350,350,380]}));
    parts.push(mixerOoxmlForm1CutSpacer());
    const lowerGrid=[1530,2120,3400,3416];
    // Dòng MÃ ĐỀ/SỐ PHÁCH ở phần dưới tách riêng, khung chấm điểm liền ngay phía dưới.
    parts.push(mixerOoxmlTable([[
      mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${code}`,{bold:true,size:28})),{width:5387}),
      mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('SỐ PHÁCH:')),{width:5079})
    ]],{gridWidths:[5387,5079],rowHeights:[380]}));
    parts.push(mixerOoxmlTable([
      [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Điểm',{bold:true}),{align:'center'}),{width:lowerGrid[0]+lowerGrid[1],colSpan:2,marginY:0}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Người chấm thứ nhất',{bold:true}),{align:'center'}),{width:lowerGrid[2],marginY:0}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Người chấm thứ hai',{bold:true}),{align:'center'}),{width:lowerGrid[3],marginY:0})],
      [mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Bằng số')),{width:lowerGrid[0],vAlign:'top'}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Bằng chữ')),{width:lowerGrid[1],vAlign:'top'}),mixerOoxmlCell(mixerOoxmlParagraph(''),{width:lowerGrid[2],vAlign:'top'}),mixerOoxmlCell(mixerOoxmlParagraph(''),{width:lowerGrid[3],vAlign:'top'})]
    ],{gridWidths:lowerGrid,rowHeights:[350,850]}));
    parts.push(mixerOoxmlParagraph('',{before:0,after:0,line:420}));
    return parts;
  }

  async function mixerOoxmlMcOptions(options, media) {
    const opts = Array.isArray(options) ? options : [];
    const mode = mixerOptionLayoutMode(opts);
    if (mode === 'stack' || opts.length !== 4) {
      const out = [];
      for (const o of opts) {
        out.push(...await mixerOoxmlRichBlocks(o.text || '', `${String(o.letter || '').toUpperCase()}. `, media));
      }
      return out;
    }

    const colCount = mode === 'row4' ? 4 : 2;
    const cellWidth = Math.floor(10466 / colCount);
    const gridWidths = Array.from({ length: colCount }, () => cellWidth);
    const sourceRows = mode === 'row4' ? [opts] : [opts.slice(0, 2), opts.slice(2, 4)];
    const rows = [];
    for (const row of sourceRows) {
      const cells = [];
      for (let i = 0; i < colCount; i += 1) {
        const option = row[i];
        if (!option) {
          cells.push(mixerOoxmlCell(mixerOoxmlParagraph(''), { width: cellWidth }));
          continue;
        }
        const content = await mixerOoxmlRichBlocks(option.text || '', `${String(option.letter || '').toUpperCase()}. `, media);
        cells.push(mixerOoxmlCell(content, { width: cellWidth }));
      }
      rows.push(cells);
    }
    return [mixerOoxmlTable(rows, { noBorder: true, gridWidths, width: 10466 })];
  }

  async function mixerOoxmlQuestion(q, media) {
    const out = [];
    if(q&&q.type==='essay'){
      out.push(...await mixerOoxmlEssayLines(q.prompt||'',`Câu ${q.displayNumber}. `,media));
    }else{
      out.push(...await mixerOoxmlRichBlocks(q.prompt || '', `Câu ${q.displayNumber}. `, media));
    }
    if (q.type === 'single') {
      out.push(...await mixerOoxmlMcOptions(q.options || [], media));
    } else if (q.type === 'true_false') {
      if(!mixerIsDirectForm()){
        for(const o of (q.options||[])){
          out.push(...await mixerOoxmlRichBlocks(
            o.text||'',
            `${String(o.letter||'').toLowerCase()}) `,
            media
          ));
        }
      }else{
        const widths=[8700,1766];
        const rows=[[
          mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Nội dung',{bold:true}),{align:'center'}),{width:widths[0]}),
          mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('Đ hoặc S',{bold:true}),{align:'center'}),{width:widths[1]})
        ]];
        for (const o of (q.options || [])) {
          const txt = `${String(o.letter || '').toLowerCase()}) ${mixerPlainTextFromRich(o.text || '')}`;
          rows.push([mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun(txt)),{width:widths[0]}),mixerOoxmlCell(mixerOoxmlParagraph(mixerOoxmlRun('')),{width:widths[1]})]);
        }
        out.push(mixerOoxmlTable(rows,{gridWidths:widths}));
        out.push(mixerOoxmlParagraph(''));
      }
    } else if (q.type === 'short') {
      if(mixerIsDirectForm()){
        out.push(mixerOoxmlParagraph(mixerOoxmlRun('Trả lời: ........................................')));
      }
    }
    return out;
  }


  function mixerOoxmlEssayDottedLine(){
    /* 10466 dxa là đúng bề rộng vùng văn bản A4 hiện dùng.
       Tab leader dấu chấm chạy từ lề trái đến đúng lề phải.
       w:line=360 với lineRule=auto tương ứng 1,5 lines. */
    return `<w:p>`+
      `<w:pPr>`+
        `<w:tabs><w:tab w:val="right" w:leader="dot" w:pos="10466"/></w:tabs>`+
        `<w:spacing w:before="0" w:after="0" w:line="360" w:lineRule="auto"/>`+
        `<w:ind w:left="0" w:right="0" w:firstLine="0"/>`+
      `</w:pPr>`+
      `<w:r><w:tab/></w:r>`+
    `</w:p>`;
  }

  function mixerOoxmlEssayWorkArea(version){
    if(!mixerIsDirectForm())return [];
    const questions=Array.isArray(version&&version.questions)?version.questions:[];
    if(!questions.some((q)=>q&&q.type==='essay'))return [];
    const out=[];
    out.push(mixerOoxmlParagraph(
      mixerOoxmlRun('BÀI LÀM PHẦN TỰ LUẬN',{bold:true}),
      {align:'center',before:180,after:60,keepNext:true}
    ));
    const count=mixerEssayLineCount();
    for(let i=0;i<count;i++){
      out.push(mixerOoxmlEssayDottedLine());
    }
    return out;
  }

  function mixerOoxmlAnswers() {
    const out=[];
    const title = String(els.title.value || '').trim() || 'Đề trộn';
    out.push(mixerOoxmlPageBreak());
    out.push(mixerOoxmlParagraph(mixerOoxmlRun(`ĐÁP ÁN ${title}`,{bold:true,size:28}),{align:'left',after:100}));
    out.push(mixerOoxmlParagraph(mixerOoxmlRun('A. TRẮC NGHIỆM',{bold:true}),{after:60}));
    state.versions.forEach((version)=>{
      out.push(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${version.code}`,{bold:true}),{before:80,after:20}));
      const lines=[];
      version.questions.forEach((q)=>{
        if (q.type === 'single') lines.push(`Câu ${q.displayNumber}: ${String(q.correct || '-')}`);
        else if (q.type === 'true_false') {
          const vals=Array.isArray(q.correct)?q.correct:[];
          lines.push(`Câu ${q.displayNumber}: ${['a','b','c','d'].map((s,i)=>`${s}. ${String(vals[i] || '-')}`).join('; ')}`);
        } else if (q.type === 'short') lines.push(`Câu ${q.displayNumber}: ${String(q.answerText || '-')}`);
      });
      for (let i=0;i<lines.length;i+=8) out.push(mixerOoxmlParagraph(mixerOoxmlRun(lines.slice(i,i+8).join('; '))));
    });
    out.push(mixerOoxmlParagraph(mixerOoxmlRun('B. TỰ LUẬN',{bold:true}),{before:160,after:60}));
    state.versions.forEach((version)=>{
      const essays=version.questions.filter((q)=>q.type==='essay');
      if (!essays.length) return;
      out.push(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${version.code}`,{bold:true}),{before:80,after:20}));
      essays.forEach((q)=>{
        out.push(mixerOoxmlParagraph(mixerOoxmlRun(`Câu ${q.displayNumber}`,{bold:true}),{before:40}));
        const essayAnswer=mixerNormalizeEssayLineBreaks(String(q.answerText || '').trim());
        if(essayAnswer) {
          essayAnswer.split('\n').forEach((line)=>out.push(mixerOoxmlParagraph(mixerOoxmlRun(line))));
        } else {
          out.push(mixerOoxmlParagraph(mixerOoxmlRun('Chưa có đáp án.')));
        }
      });
    });
    return out;
  }

  function mixerDownloadBlob(blob, filename){
    const url=URL.createObjectURL(blob);
    const a=document.createElement('a');
    a.href=url;a.download=filename;document.body.appendChild(a);a.click();a.remove();
    setTimeout(()=>URL.revokeObjectURL(url),1500);
  }

  function mixerTfAnswerDisplay(value){
    const raw=String(value||'').trim().toUpperCase();
    if(raw==='D'||raw==='Đ'||raw==='T'||raw==='TRUE'||raw==='DUNG'||raw==='ĐÚNG')return 'Đ';
    if(raw==='A'||raw==='S'||raw==='F'||raw==='FALSE'||raw==='SAI')return 'S';
    return raw||'-';
  }

  function mixerXlsxCol(index){
    let n=Math.max(0,Number(index)||0),out='';
    do{out=String.fromCharCode(65+(n%26))+out;n=Math.floor(n/26)-1;}while(n>=0);
    return out;
  }

  function mixerXlsxCell(row,col,value,style=0){
    const ref=`${mixerXlsxCol(col)}${row}`;
    return `<c r="${ref}" t="inlineStr" s="${style}"><is><t xml:space="preserve">${mixerOoxmlEsc(String(value==null?'':value))}</t></is></c>`;
  }

  async function buildMixerObjectiveAnswerXlsxBlob(){
    if(!window.JSZip)throw new Error('Chưa tải được thư viện tạo Excel.');

    const versions=Array.isArray(state.versions)?state.versions:[];
    const numericQuestionNo=(q)=>{
      const raw=String(q&&q.displayNumber!=null?q.displayNumber:'').trim();
      const n=parseInt(raw,10);
      return Number.isFinite(n)?n:999999;
    };
    const ordered=(version,type)=>((version&&Array.isArray(version.questions))?version.questions:[])
      .filter((q)=>q&&q.type===type)
      .slice()
      .sort((a,b)=>numericQuestionNo(a)-numericQuestionNo(b));

    const reference=versions[0]||{questions:[]};
    const singleRef=ordered(reference,'single');
    const tfRef=ordered(reference,'true_false');
    const shortRef=ordered(reference,'short');

    const singleCols=singleRef.length;
    const tfCols=tfRef.length*4;
    const shortCols=shortRef.length;
    const answerCols=singleCols+tfCols+shortCols;
    const totalCols=Math.max(2,1+answerCols);
    const lastCol=mixerXlsxCol(totalCols-1);

    const rows=[];
    const merges=[];
    let rowNo=1;

    const xcell=(row,col,value,style=0)=>mixerXlsxCell(row,col,value,style);
    const blankRow=(height=18)=>{
      rows.push(`<row r="${rowNo}" ht="${height}" customHeight="1"></row>`);
      rowNo++;
    };
    const fullStyledRow=(values,style,height=20)=>{
      const cells=[];
      for(let c=0;c<totalCols;c++){
        cells.push(xcell(rowNo,c,values&&values[c]!=null?values[c]:'',style));
      }
      rows.push(`<row r="${rowNo}" ht="${height}" customHeight="1">${cells.join('')}</row>`);
      rowNo++;
    };
    const addMerge=(r1,c1,r2,c2)=>{
      if(r1===r2&&c1===c2)return;
      merges.push(`${mixerXlsxCol(c1)}${r1}:${mixerXlsxCol(c2)}${r2}`);
    };
    const setMergedRangeRow=(r,c1,c2,text,style)=>{
      const cells=[];
      for(let c=0;c<totalCols;c++){
        const value=c===c1?text:'';
        const useStyle=(c>=c1&&c<=c2)?style:0;
        cells.push(xcell(r,c,value,useStyle));
      }
      return cells;
    };
    const findQuestion=(version,type,displayNumber,index)=>{
      const list=ordered(version,type);
      const wanted=String(displayNumber==null?'':displayNumber).trim();
      return list.find((q)=>String(q&&q.displayNumber!=null?q.displayNumber:'').trim()===wanted)
        || list[index]
        || null;
    };

    // Tiêu đề file đáp án: lấy đúng tên đề người dùng nhập.
    const examTitle=String(els.title&&els.title.value||'').trim()||'[TÊN ĐỀ]';
    {
      const titleCells=[];
      for(let c=0;c<totalCols;c++) titleCells.push(xcell(rowNo,c,c===0?`ĐÁP ÁN TRẮC NGHIỆM ${examTitle}`:'',7));
      rows.push(`<row r="${rowNo}" ht="25" customHeight="1">${titleCells.join('')}</row>`);
      addMerge(rowNo,0,rowNo,totalCols-1);
      rowNo++;
    }

    // Dòng phân loại như mẫu.
    rows.push(`<row r="${rowNo}" ht="24" customHeight="1">${xcell(rowNo,0,'A. TRẮC NGHIỆM',1)}</row>`);
    rowNo++;

    if(!versions.length || answerCols===0){
      rows.push(`<row r="${rowNo}" ht="22" customHeight="1">${xcell(rowNo,0,'Chưa có đáp án trắc nghiệm.',6)}</row>`);
      rowNo++;
    }else{
      const rTop=rowNo;
      const rGroup=rowNo+1;
      const rQuestion=rowNo+2;
      const rSub=rowNo+3;
      const dataStart=rowNo+4;

      // Hàng 1 của bảng: ô A trống, từ B đến hết là "Câu".
      {
        const cells=[];
        for(let c=0;c<totalCols;c++)cells.push(xcell(rTop,c,c===1?'Câu':'',2));
        rows.push(`<row r="${rTop}" ht="19" customHeight="1">${cells.join('')}</row>`);
        addMerge(rTop,1,rTop,totalCols-1);
      }

      // Hàng nhóm: Mã đề / Nhiều lựa chọn / Đúng - sai / Trả lời ngắn.
      {
        const cells=[];
        for(let c=0;c<totalCols;c++)cells.push(xcell(rGroup,c,'',2));
        cells[0]=xcell(rGroup,0,'Mã đề',2);

        let col=1;
        if(singleCols){
          cells[col]=xcell(rGroup,col,'Nhiều lựa chọn',2);
          addMerge(rGroup,col,rGroup,col+singleCols-1);
          col+=singleCols;
        }
        if(tfCols){
          cells[col]=xcell(rGroup,col,'Đúng - sai',2);
          addMerge(rGroup,col,rGroup,col+tfCols-1);
          col+=tfCols;
        }
        if(shortCols){
          cells[col]=xcell(rGroup,col,'Trả lời ngắn',2);
          addMerge(rGroup,col,rGroup,col+shortCols-1);
        }
        rows.push(`<row r="${rGroup}" ht="20" customHeight="1">${cells.join('')}</row>`);
        addMerge(rGroup,0,rSub,0);
      }

      // Hàng số câu.
      {
        const cells=[];
        for(let c=0;c<totalCols;c++)cells.push(xcell(rQuestion,c,'',2));
        let col=1;

        singleRef.forEach((q)=>{
          cells[col]=xcell(rQuestion,col,String(q.displayNumber||''),2);
          addMerge(rQuestion,col,rSub,col);
          col++;
        });

        tfRef.forEach((q)=>{
          cells[col]=xcell(rQuestion,col,String(q.displayNumber||''),2);
          addMerge(rQuestion,col,rQuestion,col+3);
          col+=4;
        });

        shortRef.forEach((q)=>{
          cells[col]=xcell(rQuestion,col,String(q.displayNumber||''),2);
          addMerge(rQuestion,col,rSub,col);
          col++;
        });

        rows.push(`<row r="${rQuestion}" ht="19" customHeight="1">${cells.join('')}</row>`);
      }

      // Hàng a/b/c/d chỉ dùng cho Đúng - sai.
      {
        const cells=[];
        for(let c=0;c<totalCols;c++)cells.push(xcell(rSub,c,'',2));
        let col=1+singleCols;
        tfRef.forEach(()=>{
          ['a','b','c','d'].forEach((label)=>{
            cells[col]=xcell(rSub,col,label,2);
            col++;
          });
        });
        rows.push(`<row r="${rSub}" ht="19" customHeight="1">${cells.join('')}</row>`);
      }

      // Mỗi mã đề = 1 hàng.
      versions.forEach((version,versionIndex)=>{
        const rr=dataStart+versionIndex;
        const cells=[];
        for(let c=0;c<totalCols;c++)cells.push(xcell(rr,c,'',3));

        const codeRaw=String(version&&version.code!=null?version.code:(versionIndex+1)).trim();
        const code=/^\d+$/.test(codeRaw)?codeRaw.padStart(2,'0'):codeRaw;
        cells[0]=xcell(rr,0,code,4);

        let col=1;
        singleRef.forEach((refQ,index)=>{
          const q=findQuestion(version,'single',refQ.displayNumber,index);
          cells[col]=xcell(rr,col,String(q&&q.correct||'-').toUpperCase(),3);
          col++;
        });

        tfRef.forEach((refQ,index)=>{
          const q=findQuestion(version,'true_false',refQ.displayNumber,index);
          const values=Array.isArray(q&&q.correct)?q.correct:[];
          for(let si=0;si<4;si++){
            cells[col]=xcell(rr,col,mixerTfAnswerDisplay(values[si]),3);
            col++;
          }
        });

        shortRef.forEach((refQ,index)=>{
          const q=findQuestion(version,'short',refQ.displayNumber,index);
          const value=String(q&&q.answerText!=null?q.answerText:'').trim()||'-';
          cells[col]=xcell(rr,col,value,5);
          col++;
        });

        rows.push(`<row r="${rr}" ht="20" customHeight="1">${cells.join('')}</row>`);
      });

      rowNo=dataStart+versions.length;
    }

    const mergeXml=merges.length
      ? `<mergeCells count="${merges.length}">${merges.map((v)=>`<mergeCell ref="${v}"/>`).join('')}</mergeCells>`
      : '';

    // Độ rộng cột: Mã đề hẹp; MC/Đ-S vừa; Trả lời ngắn rộng hơn.
    const cols=[];
    cols.push('<col min="1" max="1" width="8" customWidth="1"/>');
    let excelCol=2;
    if(singleCols){
      cols.push(`<col min="${excelCol}" max="${excelCol+singleCols-1}" width="5.5" customWidth="1"/>`);
      excelCol+=singleCols;
    }
    if(tfCols){
      cols.push(`<col min="${excelCol}" max="${excelCol+tfCols-1}" width="5.2" customWidth="1"/>`);
      excelCol+=tfCols;
    }
    if(shortCols){
      cols.push(`<col min="${excelCol}" max="${excelCol+shortCols-1}" width="7.5" customWidth="1"/>`);
    }

    const dimensionRef=`A1:${lastCol}${Math.max(1,rowNo-1)}`;
    const sheetXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <sheetPr><pageSetUpPr fitToPage="1"/></sheetPr>
  <dimension ref="${dimensionRef}"/>
  <sheetViews><sheetView workbookViewId="0"><pane ySplit="6" topLeftCell="A7" activePane="bottomLeft" state="frozen"/></sheetView></sheetViews>
  <sheetFormatPr defaultRowHeight="18"/>
  <cols>${cols.join('')}</cols>
  <sheetData>${rows.join('')}</sheetData>
  ${mergeXml}
  <pageMargins left="0.25" right="0.25" top="0.4" bottom="0.4" header="0.2" footer="0.2"/>
  <pageSetup paperSize="9" orientation="landscape" fitToWidth="1" fitToHeight="0"/>
</worksheet>`;

    // Style 0: thường; 1: tiêu đề A.TRẮC NGHIỆM; 2: header kẻ khung;
    // 3: đáp án; 4: mã đề đậm; 5: trả lời ngắn; 6: ghi chú.
    const stylesXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
  <fonts count="4">
    <font><sz val="11"/><name val="Times New Roman"/></font>
    <font><b/><sz val="11"/><name val="Times New Roman"/></font>
    <font><b/><sz val="14"/><name val="Times New Roman"/></font>
    <font><sz val="10"/><name val="Times New Roman"/></font>
  </fonts>
  <fills count="2">
    <fill><patternFill patternType="none"/></fill>
    <fill><patternFill patternType="gray125"/></fill>
  </fills>
  <borders count="2">
    <border><left/><right/><top/><bottom/><diagonal/></border>
    <border>
      <left style="thin"><color rgb="FF000000"/></left>
      <right style="thin"><color rgb="FF000000"/></right>
      <top style="thin"><color rgb="FF000000"/></top>
      <bottom style="thin"><color rgb="FF000000"/></bottom>
      <diagonal/>
    </border>
  </borders>
  <cellStyleXfs count="1">
    <xf numFmtId="0" fontId="0" fillId="0" borderId="0"/>
  </cellStyleXfs>
  <cellXfs count="8">
    <xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/>
    <xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyAlignment="1"><alignment horizontal="left" vertical="center"/></xf>
    <xf numFmtId="0" fontId="1" fillId="0" borderId="1" xfId="0" applyAlignment="1"><alignment horizontal="center" vertical="center" wrapText="1"/></xf>
    <xf numFmtId="0" fontId="0" fillId="0" borderId="1" xfId="0" applyAlignment="1"><alignment horizontal="center" vertical="center" wrapText="1"/></xf>
    <xf numFmtId="0" fontId="1" fillId="0" borderId="1" xfId="0" applyAlignment="1"><alignment horizontal="center" vertical="center"/></xf>
    <xf numFmtId="0" fontId="3" fillId="0" borderId="1" xfId="0" applyAlignment="1"><alignment horizontal="center" vertical="center" wrapText="1"/></xf>
    <xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0" applyAlignment="1"><alignment horizontal="left" vertical="center"/></xf>
    <xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyAlignment="1"><alignment horizontal="left" vertical="center"/></xf>
  </cellXfs>
  <cellStyles count="1"><cellStyle name="Normal" xfId="0" builtinId="0"/></cellStyles>
</styleSheet>`;

    const workbookXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">
  <sheets><sheet name="Đáp án trắc nghiệm" sheetId="1" r:id="rId1"/></sheets>
</workbook>`;
    const wbRels=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.xml"/>
  <Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/>
</Relationships>`;
    const rootRels=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
  <Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/>
</Relationships>`;
    const types=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
  <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
  <Default Extension="xml" ContentType="application/xml"/>
  <Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/>
  <Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/>
  <Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/>
</Types>`;

    const zip=new window.JSZip();
    zip.file('[Content_Types].xml',types);
    zip.folder('_rels').file('.rels',rootRels);
    zip.folder('xl').file('workbook.xml',workbookXml);
    zip.folder('xl').file('styles.xml',stylesXml);
    zip.folder('xl').folder('_rels').file('workbook.xml.rels',wbRels);
    zip.folder('xl').folder('worksheets').file('sheet1.xml',sheetXml);
    return await zip.generateAsync({
      type:'blob',
      mimeType:'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
      compression:'DEFLATE'
    });
  }

  async function mixerOoxmlEssayAnswers(media){
    const out=[];
    const title=String(els.title.value||'').trim()||'Đề trộn';
    out.push(mixerOoxmlParagraph(mixerOoxmlRun(`ĐÁP ÁN ${title}`,{bold:true,size:28}),{align:'left',after:120}));
    let any=false;
    for(const version of state.versions){
      const essays=version.questions.filter(q=>q.type==='essay');
      if(!essays.length)continue;
      any=true;
      out.push(mixerOoxmlParagraph(mixerOoxmlRun(`MÃ ĐỀ ${version.code}`,{bold:true,size:24}),{align:'center',before:120,after:50}));
      out.push(mixerOoxmlParagraph(mixerOoxmlRun('IV. TỰ LUẬN',{bold:true}),{before:60,after:40}));
      for(const q of essays){
        out.push(mixerOoxmlParagraph(mixerOoxmlRun(`Câu ${q.displayNumber}`,{bold:true}),{before:70,after:20}));
        const ans=mixerNormalizeEssayLineBreaks(String(q.answerText||'').trim());
        if(ans)out.push(...await mixerOoxmlEssayLines(ans,'',media));
        else out.push(mixerOoxmlParagraph(mixerOoxmlRun('Chưa có đáp án.')));
      }
    }
    if(!any)out.push(mixerOoxmlParagraph(mixerOoxmlRun('Không có câu tự luận.')));
    return out;
  }

  async function buildMixerEssayAnswerDocxBlob(){
    if(!window.JSZip)throw new Error('Chưa tải được thư viện đóng gói Word.');
    const media={imageNo:0,oleNo:0,files:[],embeddings:[],rels:[]};
    const body=await mixerOoxmlEssayAnswers(media);
    body.push('<w:sectPr><w:pgSz w:w="11906" w:h="16838"/><w:pgMar w:top="720" w:right="720" w:bottom="720" w:left="720" w:header="360" w:footer="360" w:gutter="0"/></w:sectPr>');
    const documentXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:pic="http://schemas.openxmlformats.org/drawingml/2006/picture" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><w:body>${body.join('')}</w:body></w:document>`;
    const stylesXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:styles xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"><w:docDefaults><w:rPrDefault><w:rPr><w:rFonts w:ascii="Times New Roman" w:hAnsi="Times New Roman" w:eastAsia="Times New Roman"/><w:sz w:val="24"/><w:szCs w:val="24"/></w:rPr></w:rPrDefault><w:pPrDefault><w:pPr><w:spacing w:line="240" w:lineRule="auto"/></w:pPr></w:pPrDefault></w:docDefaults><w:style w:type="paragraph" w:default="1" w:styleId="Normal"><w:name w:val="Normal"/><w:qFormat/></w:style></w:styles>`;
    const relsXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/></Relationships>`;
    const docRelsXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rIdStyles" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/>${media.rels.join('')}</Relationships>`;
    const imageDefaults=Array.from(new Map(media.files.map(f=>[f.ext,f.contentType])).entries()).map(([ext,ct])=>`<Default Extension="${mixerOoxmlEsc(ext)}" ContentType="${mixerOoxmlEsc(ct)}"/>`).join('');
    const oleDefault=(media.embeddings&&media.embeddings.length)?'<Default Extension="bin" ContentType="application/vnd.openxmlformats-officedocument.oleObject"/>':'';
    const contentTypesXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/><Default Extension="xml" ContentType="application/xml"/>${imageDefaults}${oleDefault}<Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/><Override PartName="/word/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml"/></Types>`;
    mixerValidateXml(documentXml,'Đáp án tự luận');
    const zip=new window.JSZip();zip.file('[Content_Types].xml',contentTypesXml);zip.folder('_rels').file('.rels',relsXml);zip.folder('word').file('document.xml',documentXml);zip.folder('word').file('styles.xml',stylesXml);zip.folder('word').folder('_rels').file('document.xml.rels',docRelsXml);media.files.forEach(f=>zip.folder('word').folder('media').file(f.filename,f.data));(media.embeddings||[]).forEach(f=>zip.folder('word').folder('embeddings').file(f.filename,f.data));
    return await zip.generateAsync({type:'blob',mimeType:'application/vnd.openxmlformats-officedocument.wordprocessingml.document',compression:'DEFLATE'});
  }

  async function downloadObjectiveAnswers(){
    if(!state.versions.length){setStatus('Bạn cần bấm Trộn đề trước khi tải đáp án.','err');return;}
    const old=els.answerExcel&&els.answerExcel.textContent;if(els.answerExcel){els.answerExcel.disabled=true;els.answerExcel.textContent='Đang tạo Excel...';}
    try{const blob=await buildMixerObjectiveAnswerXlsxBlob();mixerDownloadBlob(blob,`${mixerSafeFileName(String(els.title.value||'').trim()||'Đề trộn')} - Đáp án trắc nghiệm.xlsx`);setStatus('Đã tạo file Excel đáp án trắc nghiệm.','ok');if(els.answerMenu)els.answerMenu.hidden=true;}catch(err){console.error(err);setStatus(err&&err.message?err.message:'Không tạo được file Excel đáp án.','err');}finally{if(els.answerExcel){els.answerExcel.disabled=false;els.answerExcel.textContent=old||'Trắc nghiệm – Excel';}}
  }

  async function downloadEssayAnswers(){
    if(!state.versions.length){setStatus('Bạn cần bấm Trộn đề trước khi tải đáp án.','err');return;}
    const old=els.answerWord&&els.answerWord.textContent;if(els.answerWord){els.answerWord.disabled=true;els.answerWord.textContent='Đang tạo Word...';}
    try{const blob=await buildMixerEssayAnswerDocxBlob();mixerDownloadBlob(blob,`${mixerSafeFileName(String(els.title.value||'').trim()||'Đề trộn')} - Đáp án tự luận.docx`);setStatus('Đã tạo file Word đáp án tự luận.','ok');if(els.answerMenu)els.answerMenu.hidden=true;}catch(err){console.error(err);setStatus(err&&err.message?err.message:'Không tạo được file Word đáp án tự luận.','err');}finally{if(els.answerWord){els.answerWord.disabled=false;els.answerWord.textContent=old||'Tự luận – Word';}}
  }

  function mixerValidateXml(xml, label) {
    if (typeof DOMParser !== 'function') return;
    const doc = new DOMParser().parseFromString(String(xml || ''),'application/xml');
    if (doc.getElementsByTagName('parsererror').length) throw new Error(`${label} có XML không hợp lệ.`);
  }


  function mixerOoxmlExamFooter(code){
    const label=`Mã đề ${String(code||'').trim()}`;
    return `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>`+
      `<w:ftr xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" `+
      `xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships">`+
        `<w:p>`+
          `<w:pPr>`+
            `<w:tabs><w:tab w:val="right" w:pos="10466"/></w:tabs>`+
            `<w:spacing w:before="0" w:after="0" w:line="220" w:lineRule="auto"/>`+
            `<w:pBdr><w:top w:val="single" w:sz="4" w:space="3" w:color="A6A6A6"/></w:pBdr>`+
          `</w:pPr>`+
          `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>${mixerOoxmlEsc(label)}</w:t></w:r>`+
          `<w:r><w:tab/></w:r>`+
          `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>Trang </w:t></w:r>`+
          `<w:fldSimple w:instr="PAGE"><w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>1</w:t></w:r></w:fldSimple>`+
          `<w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>/</w:t></w:r>`+
          `<w:fldSimple w:instr="NUMPAGES"><w:r><w:rPr><w:sz w:val="18"/><w:color w:val="666666"/></w:rPr><w:t>1</w:t></w:r></w:fldSimple>`+
        `</w:p>`+
      `</w:ftr>`;
  }


  // Khung gạch chéo 5,5 cm + vùng cắt phách 1 cm, chỉ xuất hiện trên trang 2 của Form 1.
      async function mixerForm1ConditionalPage2HeaderPatch(sourceBlob) {
        const zipIn = await window.JSZip.loadAsync(sourceBlob);
        const xmlName = 'word/document.xml';
        const relName = 'word/_rels/document.xml.rels';
        const ctName = '[Content_Types].xml';
        let bodyXml = await zipIn.file(xmlName).async('string');
        let docRelXml = await zipIn.file(relName).async('string');
        let typesXml = await zipIn.file(ctName).async('string');
        const headerRel = 'rIdMVIPForm1Page2Header';
        const firstRel = 'rIdMVIPForm1FirstHeader';
        const blankRel = 'rIdMVIPForm1BlankHeader';
        let examSectionCount = 0;
        bodyXml = bodyXml.replace(/<w:sectPr\b[^>]*>[\s\S]*?<\/w:sectPr>/g, (sect) => {
          const m = sect.match(/<w:footerReference\s+w:type="default"\s+r:id="(rIdFooter1)"\s*\/>/);
          if (m) {
            examSectionCount += 1;
            const headerRefs = `<w:headerReference w:type="even" r:id="${headerRel}"/>` +
              `<w:headerReference w:type="default" r:id="${blankRel}"/>` +
              `<w:headerReference w:type="first" r:id="${firstRel}"/>` +
              `<w:footerReference w:type="first" r:id="${m[1]}"/>` +
              `<w:footerReference w:type="even" r:id="${m[1]}"/>`;
            const withRefs = sect.replace(/<w:sectPr([^>]*)>/, `<w:sectPr$1>${headerRefs}`);
            return withRefs.replace('<w:pgSz ', '<w:titlePg/><w:pgSz ');
          }
          // Đặt Header trống trên các section ma trận/đáp án sau phần đề,
          // không để Header của đề kế thừa sang phần này.
          const existingFooter = sect.match(/<w:footerReference\s+w:type="default"\s+r:id="([^"]+)"\s*\/>/);
          const evenFooter = existingFooter ? `<w:footerReference w:type="even" r:id="${existingFooter[1]}"/>` : '';
          return sect.replace(/<w:sectPr([^>]*)>/,
            `<w:sectPr$1><w:headerReference w:type="even" r:id="${blankRel}"/>` +
            `<w:headerReference w:type="default" r:id="${blankRel}"/>` + evenFooter);
        });
        if (!examSectionCount) throw new Error('Không tìm thấy section đề thi để ghim khung Form 1.');
        const headerBase64 = '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';
        const firstBase64 = 'PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiIHN0YW5kYWxvbmU9InllcyI/Pjx3OmhkciB4bWxuczp3PSJodHRwOi8vc2NoZW1hcy5vcGVueG1sZm9ybWF0cy5vcmcvd29yZHByb2Nlc3NpbmdtbC8yMDA2L21haW4iPjx3OnAvPjwvdzpoZHI+';
        const pictureBase64 = 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        const asBytes = (str) => Uint8Array.from(atob(str), (c) => c.charCodeAt(0));
        zipIn.file(xmlName, bodyXml);
        const headerType = 'application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml';
        typesXml = typesXml.replace('</Types>',
          `<Override PartName="/word/header_mvip_box.xml" ContentType="${headerType}"/>` +
          `<Override PartName="/word/header_mvip_first.xml" ContentType="${headerType}"/>` +
          `<Override PartName="/word/header_mvip_blank.xml" ContentType="${headerType}"/>` +
          (typesXml.includes('Extension="png"') ? '' : '<Default Extension="png" ContentType="image/png"/>') +
          '</Types>');
        docRelXml = docRelXml.replace('</Relationships>',
          `<Relationship Id="${headerRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_box.xml"/>` +
          `<Relationship Id="${firstRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_first.xml"/>` +
          `<Relationship Id="${blankRel}" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/header" Target="header_mvip_blank.xml"/>` +
          '</Relationships>');
        zipIn.file(relName, docRelXml);
        zipIn.file(ctName, typesXml);
        zipIn.file('word/header_mvip_box.xml', asBytes(headerBase64));
        zipIn.file('word/header_mvip_first.xml', asBytes(firstBase64));
        zipIn.file('word/header_mvip_blank.xml', asBytes(firstBase64));
        zipIn.file('word/media/_form1_conditional_box.png', asBytes(pictureBase64));
        zipIn.file('word/_rels/header_mvip_box.xml.rels',
          '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' +
          '<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">' +
          '<Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="media/_form1_conditional_box.png"/>' +
          '</Relationships>');
        // Yêu cầu Word cập nhật PAGE/IF lần đầu mở tài liệu.
        const settingFile = zipIn.file('word/settings.xml');
        if (settingFile) {
          let cfg = await settingFile.async('string');
          if (!cfg.includes('<w:updateFields')) {
            cfg = cfg.replace('</w:settings>', '<w:updateFields w:val="true"/></w:settings>');
          }
          if (!cfg.includes('<w:evenAndOddHeaders')) {
            cfg = cfg.replace('</w:settings>', '<w:evenAndOddHeaders w:val="true"/></w:settings>');
          }
          zipIn.file('word/settings.xml', cfg);
        } else {
          zipIn.file('word/settings.xml', '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>' +
            '<w:settings xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">' +
            '<w:evenAndOddHeaders w:val="true"/><w:updateFields w:val="true"/></w:settings>');
          typesXml = typesXml.replace('</Types>',
            '<Override PartName="/word/settings.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.settings+xml"/></Types>');
          docRelXml = docRelXml.replace('</Relationships>',
            '<Relationship Id="rIdMVIPForm1Settings" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings" Target="settings.xml"/></Relationships>');
          zipIn.file(ctName, typesXml);
          zipIn.file(relName, docRelXml);
        }
        return await zipIn.generateAsync({ type: 'blob', mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' });
      };

  async function buildMixerDocxBlob(versionsOverride=null) {
    if (!window.JSZip) throw new Error('Chưa tải được thư viện đóng gói Word. Bạn tải lại trang rồi thử lại.');
    const versions=Array.isArray(versionsOverride)?versionsOverride:state.versions;
    const footerCode=String(versions[0]&&versions[0].code||'').trim();
    const media={ imageNo:0, oleNo:0, files:[], embeddings:[], rels:[] };
    const body=[];
    for (let vi=0;vi<versions.length;vi+=1) {
      const version=versions[vi];
      if (vi>0) body.push(mixerOoxmlPageBreak());

      const form=currentForm();
      const baseForm=mixerBaseForm(form);
      body.push(...mixerOoxmlHeader(version));

      let lastType='';
      // Form 1: không đo và ngắt trang cưỡng bức; Word tự dàn nội dung.
      // Khung mặt sau phách được ghim ở Header trang 2 khi đóng gói DOCX.
      for (const q of version.questions) {
        const isNewSection=q.type!==lastType;
        if (isNewSection) body.push(mixerOoxmlParagraph(mixerOoxmlRun(typeLabel[q.type] || '',{bold:true}),{before:120,after:40,keepNext:true}));
        body.push(...await mixerOoxmlQuestion(q,media));
        if (isNewSection) lastType=q.type;
      }

      body.push(...mixerOoxmlEssayWorkArea(version));
    }
    body.push('<w:sectPr><w:footerReference w:type="default" r:id="rIdFooter1"/><w:pgSz w:w="11906" w:h="16838"/><w:pgMar w:top="720" w:right="720" w:bottom="800" w:left="720" w:header="360" w:footer="360" w:gutter="0"/></w:sectPr>');

    const documentXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:pic="http://schemas.openxmlformats.org/drawingml/2006/picture" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><w:body>${body.join('')}</w:body></w:document>`;
    const stylesXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:styles xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"><w:docDefaults><w:rPrDefault><w:rPr><w:rFonts w:ascii="Times New Roman" w:hAnsi="Times New Roman" w:eastAsia="Times New Roman"/><w:sz w:val="24"/><w:szCs w:val="24"/></w:rPr></w:rPrDefault><w:pPrDefault><w:pPr><w:spacing w:line="240" w:lineRule="auto"/></w:pPr></w:pPrDefault></w:docDefaults><w:style w:type="paragraph" w:default="1" w:styleId="Normal"><w:name w:val="Normal"/><w:qFormat/></w:style></w:styles>`;
    const relsXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="word/document.xml"/></Relationships>`;
    const docRelsXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rIdStyles" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/><Relationship Id="rIdFooter1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer" Target="footer1.xml"/><Relationship Id="rIdSettings" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings" Target="settings.xml"/>${media.rels.join('')}</Relationships>`;
    const imageDefaults=Array.from(new Map(media.files.map((f)=>[f.ext,f.contentType])).entries()).map(([ext,ct])=>`<Default Extension="${mixerOoxmlEsc(ext)}" ContentType="${mixerOoxmlEsc(ct)}"/>`).join('');
    const oleDefault=(media.embeddings&&media.embeddings.length)?'<Default Extension="bin" ContentType="application/vnd.openxmlformats-officedocument.oleObject"/>':'';
    const contentTypesXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/><Default Extension="xml" ContentType="application/xml"/>${imageDefaults}${oleDefault}<Override PartName="/word/document.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml"/><Override PartName="/word/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.styles+xml"/><Override PartName="/word/footer1.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml"/><Override PartName="/word/settings.xml" ContentType="application/vnd.openxmlformats-officedocument.wordprocessingml.settings+xml"/></Types>`;

    const footerXml=mixerOoxmlExamFooter(footerCode);
    const settingsXml=`<?xml version="1.0" encoding="UTF-8" standalone="yes"?><w:settings xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"><w:updateFields w:val="true"/></w:settings>`;

    mixerValidateXml(documentXml,'Nội dung Word');
    mixerValidateXml(stylesXml,'Styles Word');
    mixerValidateXml(relsXml,'Relationships gốc');
    mixerValidateXml(docRelsXml,'Relationships tài liệu');
    mixerValidateXml(contentTypesXml,'Content Types');
    mixerValidateXml(footerXml,'Footer Word');
    mixerValidateXml(settingsXml,'Settings Word');

    const zip=new window.JSZip();
    zip.file('[Content_Types].xml',contentTypesXml);
    zip.folder('_rels').file('.rels',relsXml);
    zip.folder('word').file('document.xml',documentXml);
    zip.folder('word').file('styles.xml',stylesXml);
    zip.folder('word').file('footer1.xml',footerXml);
    zip.folder('word').file('settings.xml',settingsXml);
    zip.folder('word').folder('_rels').file('document.xml.rels',docRelsXml);
    media.files.forEach((f)=>zip.folder('word').folder('media').file(f.filename,f.data));
    (media.embeddings||[]).forEach((f)=>zip.folder('word').folder('embeddings').file(f.filename,f.data));
    const wordBlob = await zip.generateAsync({type:'blob',mimeType:'application/vnd.openxmlformats-officedocument.wordprocessingml.document',compression:'DEFLATE'});
    return mixerBaseForm(currentForm()) === 'form1' ? await mixerForm1ConditionalPage2HeaderPatch(wordBlob) : wordBlob;
  }

  async function download() {
    if (!state.versions.length) {
      setStatus('Bạn cần bấm Trộn đề trước khi tải xuống.', 'err');
      return;
    }
    if(!window.JSZip){
      setStatus('Chưa tải được thư viện tạo ZIP. Bạn tải lại trang rồi thử lại.','err');
      return;
    }

    const oldText=els.download.textContent;
    els.download.disabled=true;
    els.download.textContent='Đang tạo ZIP...';

    try{
      const title=String(els.title.value||'').trim()||'Đề trộn';
      const safeTitle=mixerSafeFileName(title);
      const outerZip=new window.JSZip();
      const folder=outerZip.folder(safeTitle);

      // Mỗi mã đề là một file Word riêng.
      for(let i=0;i<state.versions.length;i++){
        const version=state.versions[i];
        els.download.textContent=`Đang tạo mã đề ${version.code}...`;
        const docxBlob=await buildMixerDocxBlob([version]);
        if(!(docxBlob instanceof Blob)||docxBlob.size<1000){
          throw new Error(`File Word mã đề ${version.code} sinh ra không hợp lệ.`);
        }

        // Kiểm tra gói DOCX trước khi cho vào ZIP.
        if(window.JSZip&&typeof window.JSZip.loadAsync==='function'){
          const testZip=await window.JSZip.loadAsync(await docxBlob.arrayBuffer());
          if(!testZip.file('[Content_Types].xml')||!testZip.file('word/document.xml')){
            throw new Error(`Mã đề ${version.code} thiếu thành phần Word bắt buộc.`);
          }
        }

        folder.file(
          `${safeTitle} - Mã đề ${String(version.code||'').trim()||String(i+1).padStart(2,'0')}.docx`,
          await docxBlob.arrayBuffer()
        );
      }

      // Đáp án trắc nghiệm Excel.
      els.download.textContent='Đang tạo đáp án Excel...';
      const xlsxBlob=await buildMixerObjectiveAnswerXlsxBlob();
      folder.file(
        `${safeTitle} - Đáp án trắc nghiệm.xlsx`,
        await xlsxBlob.arrayBuffer()
      );

      // Đáp án tự luận Word.
      els.download.textContent='Đang tạo đáp án tự luận...';
      const essayBlob=await buildMixerEssayAnswerDocxBlob();
      folder.file(
        `${safeTitle} - Đáp án tự luận.docx`,
        await essayBlob.arrayBuffer()
      );

      els.download.textContent='Đang nén ZIP...';
      const zipBlob=await outerZip.generateAsync({
        type:'blob',
        mimeType:'application/zip',
        compression:'DEFLATE',
        compressionOptions:{level:6}
      });

      mixerDownloadBlob(zipBlob,`${safeTitle}.zip`);
      setStatus(
        `Đã tạo ${safeTitle}.zip gồm ${state.versions.length} mã đề, đáp án trắc nghiệm Excel và đáp án tự luận Word.`,
        'ok'
      );
    }catch(err){
      console.error('Exam mixer ZIP export failed',err);
      setStatus(err&&err.message?err.message:'Không tạo được file ZIP.','err');
    }finally{
      els.download.disabled=false;
      els.download.textContent=oldText||'Tải xuống';
    }
  }

  els.open.addEventListener('click',(e)=>{e.preventDefault();e.stopPropagation();openGuideModal();});
  if(els.guideOk)els.guideOk.addEventListener('click',(e)=>{e.preventDefault();e.stopPropagation();confirmGuideAndOpenMixer();});
  if(els.guideClose)els.guideClose.addEventListener('click',closeGuideModal);
  if(els.guideModal)els.guideModal.addEventListener('click',(e)=>{if(e.target && e.target.getAttribute('data-exam-mixer-guide-close')==='1')closeGuideModal();});
  els.close.addEventListener('click',closeModal);
  els.modal.addEventListener('click',(e)=>{if(e.target && e.target.getAttribute('data-exam-mixer-close')==='1')closeModal();});
  els.upload.addEventListener('click',()=>{els.file.value=''; if(typeof els.file.showPicker==='function'){try{els.file.showPicker();return;}catch(_){}} els.file.click();});
  els.file.addEventListener('change',()=>loadFile(els.file.files && els.file.files[0]));
  els.shuffle.addEventListener('click',generate);
  els.download.addEventListener('click',download);
  if(els.answer)els.answer.addEventListener('click',(e)=>{e.preventDefault();e.stopPropagation();if(!els.answer.disabled&&els.answerMenu)els.answerMenu.hidden=!els.answerMenu.hidden;});
  if(els.answerExcel)els.answerExcel.addEventListener('click',(e)=>{e.preventDefault();e.stopPropagation();downloadObjectiveAnswers();});
  if(els.answerWord)els.answerWord.addEventListener('click',(e)=>{e.preventDefault();e.stopPropagation();downloadEssayAnswers();});
  document.addEventListener('click',(e)=>{if(els.answerMenu&&!els.answerMenu.hidden&&!(e.target&&e.target.closest&&e.target.closest('.exam-mixer-answer-wrap')))els.answerMenu.hidden=true;});
  els.previewCode.addEventListener('change',renderPreview);
  document.querySelectorAll('input[name="examMixerForm"]').forEach((radio)=>{
    radio.addEventListener('change',syncFormFields);
  });
  if(els.essayLineCount){
    els.essayLineCount.addEventListener('input',()=>{
      const value=mixerEssayLineCount();
      if(String(els.essayLineCount.value)!==String(value) && Number(els.essayLineCount.value)) {
        els.essayLineCount.value=String(value);
      }
      if(state.questions.length || state.versions.length)renderPreview();
    });
    els.essayLineCount.addEventListener('change',()=>{
      els.essayLineCount.value=String(mixerEssayLineCount());
      if(state.questions.length || state.versions.length)renderPreview();
    });
  }
  [els.title,els.district,els.school,els.subject,els.grade,els.year,els.duration].forEach((input)=>input && input.addEventListener('input',()=>{
    if(state.questions.length || state.versions.length) renderPreview();
  }));
  document.addEventListener('keydown',(e)=>{
    if(e.key!=='Escape')return;
    if(els.guideModal && !els.guideModal.hidden){closeGuideModal();return;}
    if(!els.modal.hidden)closeModal();
  });
  syncFormFields();
})();
</script>


<!-- Bản điều chỉnh 2026-10-06 v43: tăng độ tin cậy nút điều khiển từ điện thoại. A/B/C/D và Đ/S được xử lý idempotent để app có thể tự gửi lại khi chưa nhận command_ack mà không làm đảo/bỏ lựa chọn. -->
<!-- Bản điều chỉnh 2026-10-06 v38: khi PowerPoint nhận thẻ đầu tiên, tự chia 3/4 màn chiếu bên trái + 1/4 bảng học sinh bên phải (2 cột, A/B/C/D ở trên); chọn đáp án trực tiếp, không cần STOP thủ công. Giữ tương thích remote v37. -->
<script id="mvip-phone-remote-script-20261006-v37">
(() => {
  'use strict';

  const remote = {
    ws: null,
    // Token của chính WebSocket remote hiện tại; không đồng nhất với token đăng nhập mới.
    authToken: '',
    retryTimer: 0,
    retryCount: 0,
    heartbeatTimer: 0,
    stateTimer: 0,
    lastSignature: '',
    closedByUser: false,
    tfCursor: { word: '', single: '' },
    // Mỗi câu Đúng–Sai có con trỏ riêng: không dùng ý d của câu trước cho câu tiếp theo.
    tfQuestionKey: { word: '', single: '' },
    // PowerPoint: sau khi điện thoại STOP quét, chuyển sang bước chọn đáp án A/B/C/D.
    pptAwaitAnswer: false,
    // Hủy các lượt retry cũ nếu giáo viên vừa chọn một phương án mới cùng nhóm.
    commandRetrySerial: Object.create(null),
    // v13: mặc định Remote ở chế độ ngủ. Chỉ WebSocket listener + heartbeat tồn tại.
    phoneActiveUntil: 0,
    activePollTimer: 0,
    idleDirty: false,
  };

  // MVIP HYBRID THỬ NGHIỆM: WebRTC LAN (chỉ datachannel, không camera/media).
  // Tài khoản vẫn xác thực qua WS server; SDP/ICE do server chuyển tiếp.
  const rtcPeers = new Map();
  const rtcCommandSeen = new Map();
  let rtcPhoneCount = 0;
  function rtcOpenPeers() {
    return Array.from(rtcPeers.values()).filter(p => p.channel && p.channel.readyState === 'open');
  }
  function rtcCleanupSeen() {
    const now = Date.now();
    for (const [id, expiry] of rtcCommandSeen) if (expiry < now) rtcCommandSeen.delete(id);
    if (rtcCommandSeen.size > 600) rtcCommandSeen.clear();
  }
  function rtcExecuteOnce(command, id) {
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token || token !== remote.authToken) return false;
    rtcCleanupSeen();
    if (id && rtcCommandSeen.has(id)) return true;
    wakeRemoteForPhone('rtc_command');
    const success = runRemoteCommandWithRetry(command);
    if (id && success) rtcCommandSeen.set(id, Date.now() + 60000);
    return !!success;
  }
  function rtcClosePeer(id) {
    const peer = rtcPeers.get(id);
    if (!peer) return;
    rtcPeers.delete(id);
    try { peer.channel?.close(); } catch (_) {}
    try { peer.pc?.close(); } catch (_) {}
    remote.lastSignature = '';
    // Có thể mất LAN, phải đưa trạng thái mới nhất lên server để fallback.
    if (remote.ws?.readyState === WebSocket.OPEN) setTimeout(() => sendState(true), 0);
  }
  function rtcCloseAll() {
    for (const id of Array.from(rtcPeers.keys())) rtcClosePeer(id);
  }
  function rtcSendSignal(message) { return sendRaw(message); }
  function rtcSendState(value) {
    let sent = 0;
    const raw = JSON.stringify({type:'remote_presence', online:true, state:value, ts:Date.now()});
    for (const peer of rtcOpenPeers()) {
      try { peer.channel.send(raw); sent++; } catch (_) {}
    }
    return sent;
  }
  async function rtcOffer(peerId) {
    if (!peerId || !window.RTCPeerConnection || remote.ws?.readyState !== WebSocket.OPEN) return;
    rtcClosePeer(peerId);
    try {
      const pc = new RTCPeerConnection({iceServers:[], iceTransportPolicy:'all'});
      const peer = {pc, channel:null, iceQueue:[], outboundIce:[], offerSent:false};
      rtcPeers.set(peerId, peer);
      const channel = pc.createDataChannel('mvip-control', {ordered:true});
      peer.channel = channel;
      channel.onopen = () => { wakeRemoteForPhone('rtc_open'); sendState(true); };
      channel.onclose = () => rtcClosePeer(peerId);
      channel.onerror = () => rtcClosePeer(peerId);
      channel.onmessage = event => {
        try {
          const msg = JSON.parse(event.data);
          if (msg?.type !== 'command') return;
          const command = String(msg.command || '').replace(/[^a-zA-Z0-9_\-]/g,'').slice(0,64);
          const id = String(msg.id || '').replace(/[^a-zA-Z0-9_\-]/g,'').slice(0,80);
          if (!command) return;
          const ok = rtcExecuteOnce(command, id);
          if (channel.readyState === 'open') channel.send(JSON.stringify({type:'command_ack', id, command, ok}));
        } catch (_) {}
      };
      pc.onicecandidate = event => {
        if (event.candidate && rtcPeers.get(peerId) === peer) {
          if (peer.offerSent) rtcSendSignal({type:'rtc_ice', peer_id:peerId, candidate:event.candidate.toJSON()});
          else peer.outboundIce.push(event.candidate.toJSON());
        }
      };
      pc.oniceconnectionstatechange = () => {
        if (['failed','disconnected','closed'].includes(pc.iceConnectionState)) rtcClosePeer(peerId);
      };
      const offer = await pc.createOffer();
      await pc.setLocalDescription(offer);
      if (rtcPeers.get(peerId) === peer) {
        rtcSendSignal({type:'rtc_offer', peer_id:peerId, sdp:pc.localDescription.sdp});
        peer.offerSent = true;
        peer.outboundIce.splice(0).forEach(candidate => rtcSendSignal({type:'rtc_ice', peer_id:peerId, candidate}));
      }
    } catch (_) { rtcClosePeer(peerId); }
  }
  async function rtcAnswerSignal(msg) {
    const peer = rtcPeers.get(String(msg.peer_id || ''));
    if (!peer) return;
    try {
      await peer.pc.setRemoteDescription({type:'answer', sdp:String(msg.sdp || '')});
      while (peer.iceQueue.length) {
        try { await peer.pc.addIceCandidate(peer.iceQueue.shift()); } catch (_) {}
      }
    } catch (_) { rtcClosePeer(String(msg.peer_id || '')); }
  }
  async function rtcIceSignal(msg) {
    const peer = rtcPeers.get(String(msg.peer_id || ''));
    if (!peer || !msg.candidate) return;
    if (!peer.pc.remoteDescription) { peer.iceQueue.push(msg.candidate); return; }
    try { await peer.pc.addIceCandidate(msg.candidate); } catch (_) {}
  }

  const REMOTE_PHONE_ACTIVE_MS = 10 * 60 * 1000;
  const REMOTE_ACTIVE_POLL_MS = 10000;

  function remotePhoneIsActive() {
    return Number(remote.phoneActiveUntil || 0) > Date.now();
  }

  function stopRemoteActivePoll() {
    if (remote.activePollTimer) clearInterval(remote.activePollTimer);
    remote.activePollTimer = 0;
  }

  function startRemoteActivePoll() {
    if (remote.activePollTimer) return;
    remote.activePollTimer = setInterval(() => {
      if (!remotePhoneIsActive()) {
        stopRemoteActivePoll();
        return;
      }
      const ws = remote.ws;
      if (ws && ws.readyState === WebSocket.OPEN) sendState(false);
    }, REMOTE_ACTIVE_POLL_MS);
  }

  function wakeRemoteForPhone(reason = '') {
    const wasActive = remotePhoneIsActive();
    remote.phoneActiveUntil = Date.now() + REMOTE_PHONE_ACTIVE_MS;
    startRemoteActivePoll();
    if (!wasActive || remote.idleDirty) {
      remote.idleDirty = false;
      // Điện thoại vừa hoạt động: gửi trạng thái hiện tại ngay.
      setTimeout(() => sendState(true), 0);
    }
  }

  function sleepRemoteIfIdle() {
    if (remotePhoneIsActive()) return false;
    remote.phoneActiveUntil = 0;
    stopRemoteActivePoll();
    return true;
  }

  function isVisible(el) {
    if (!(el instanceof HTMLElement) || el.hidden) return false;
    const style = getComputedStyle(el);
    return style.display !== 'none' && style.visibility !== 'hidden';
  }

  function control(id, label, enabled = true, local = false) {
    return { id, label, enabled: !!enabled, local: !!local };
  }

  function buttonEnabled(id) {
    const el = document.getElementById(id);
    return !(el instanceof HTMLButtonElement) || !el.disabled;
  }

  function isPressed(id) {
    const el = document.getElementById(id);
    return !!(el && el.getAttribute('aria-pressed') === 'true');
  }

  function fullscreenControl(buttonId) {
    const rosterVisible = typeof window.mvipRemoteScanRosterVisible === 'function'
      && window.mvipRemoteScanRosterVisible();
    if (rosterVisible) return control('question_fullscreen', 'Mở rộng', true);
    return control('question_fullscreen', isPressed(buttonId) ? 'Thu nhỏ' : 'Mở rộng', buttonEnabled(buttonId));
  }

  function magicWheelControl(kind = 'word') {
    const buttonId = kind === 'single' ? 'cv7991SingleMagicWheelBtn' : 'cv7991MagicWheelBtn';
    const button = document.getElementById(buttonId);
    const enabled = button instanceof HTMLButtonElement
      ? (!button.hidden && !button.disabled)
      : !!(window.mvipMagicWheel && typeof window.mvipMagicWheel.open === 'function');
    return control('magic_wheel_open', 'Vòng quay', enabled);
  }

  function duckRaceControl(kind = 'word') {
    const buttonId = kind === 'single' ? 'mvipSingleDuckRaceBtn' : 'mvipDuckRaceBtn';
    const button = document.getElementById(buttonId);
    const enabled = button instanceof HTMLButtonElement
      ? (!button.hidden && !button.disabled)
      : !!(window.mvipDuckRace && typeof window.mvipDuckRace.open === 'function');
    return control('duck_race_open', 'Đua vịt', enabled);
  }

  function powerPointRemoteAnsweredCount() {
    if (typeof state === 'undefined' || !state) return 0;
    let answered = 0;
    Object.values(state.currentLiveAnswers || {}).forEach((row) => {
      const ans = String((row && row.ans) || '').trim().toUpperCase();
      if (['A','B','C','D'].includes(ans)) answered += 1;
    });
    return answered;
  }

  function powerPointRemoteResultState() {
    const resultModal = document.getElementById('resultModal');
    if (!isVisible(resultModal)) return null;
    const save = document.getElementById('resultSaveBtn');
    const cancel = document.getElementById('resultCancelBtn');
    return {
      mode: 'question_result',
      title: 'Kết quả câu hỏi',
      controls: [
        control('result_save', 'Lưu', !(save instanceof HTMLButtonElement) || !save.disabled),
        control('result_cancel', 'Hủy', !(cancel instanceof HTMLButtonElement) || !cancel.disabled),
      ],
    };
  }

  function powerPointRemoteAnswerState() {
    const answered = powerPointRemoteAnsweredCount();
    const ids = { A:'correctBtnA', B:'correctBtnB', C:'correctBtnC', D:'correctBtnD' };
    const prev = document.getElementById('powerPointPresentationPrevBtn');
    const next = document.getElementById('powerPointPresentationNextBtn');
    const answerControls = Object.entries(ids).map(([letter, id]) =>
      control(`ppt_correct_${letter}`, letter, answered > 0 && buttonEnabled(id))
    );
    // Sau STOP vẫn giữ hai nút điều hướng PowerPoint. Android tự ghim
    // Slide trước/Slide sau xuống hàng cuối, ngay trên START/STOP.
    answerControls.push(
      control('ppt_prev', 'Slide trước', !(prev instanceof HTMLButtonElement) || !prev.disabled),
      control('ppt_next', 'Slide sau', !(next instanceof HTMLButtonElement) || !next.disabled),
    );
    return {
      mode: 'powerpoint_answer',
      title: answered > 0 ? `Chọn đáp án đúng · ${answered} học sinh đã quét` : 'Chọn đáp án đúng',
      controls: answerControls,
    };
  }

  function duckRaceRemoteState() {
    const modal = document.getElementById('mvipDuckRaceModal');
    if (!isVisible(modal)) return null;

    const api = window.mvipDuckRace;
    const start = document.getElementById('mvipDuckRaceStartBtn');
    const close = document.getElementById('mvipDuckRaceCloseBtn');
    const startLabel = String(start && start.textContent || '').trim();
    const normalizedStart = startLabel.normalize('NFD').replace(/[\u0300-\u036f]/g, '').replace(/đ/g,'d').replace(/Đ/g,'D').toLowerCase();
    const running = !!(api && typeof api.isRunning === 'function' && api.isRunning())
      || normalizedStart.includes('dang dua');

    if (running) {
      return {
        mode: 'duck_race_running',
        title: 'Đua vịt · Đang đua',
        controls: [control('duck_race_running', 'Đang đua', false)],
      };
    }

    const replayReady = normalizedStart.includes('dua lai');
    if (replayReady) {
      return {
        mode: 'duck_race_result',
        title: 'Đua vịt · Đã về đích',
        controls: [
          control('duck_race_close', 'Đóng', !(close instanceof HTMLButtonElement) || !close.disabled),
          control('duck_race_start', 'Đua lại', !(start instanceof HTMLButtonElement) || !start.disabled),
        ],
      };
    }

    return {
      mode: 'duck_race_ready',
      title: 'Đua vịt',
      controls: [control('duck_race_start', 'Bắt đầu', !(start instanceof HTMLButtonElement) || !start.disabled)],
    };
  }

  function magicWheelRemoteState() {
    const modal = document.getElementById('cv7991MagicWheelModal');
    if (!isVisible(modal)) return null;

    if (modal.classList.contains('has-result')) {
      return {
        mode: 'magic_wheel_result',
        title: 'Vòng quay may mắn · Đã chọn học sinh',
        controls: [
          control('magic_wheel_close', 'Đóng', true),
          control('magic_wheel_spin', 'Quay lại', true),
        ],
      };
    }

    if (modal.classList.contains('is-spinning')) {
      const api = window.mvipMagicWheel;
      if (api && typeof api.recoverIfStuck === 'function') {
        try { api.recoverIfStuck(7000); } catch (_) {}
      }
      // recoverIfStuck có thể vừa chuyển modal sang has-result.
      if (modal.classList.contains('has-result') && !modal.classList.contains('is-spinning')) {
        return {
          mode: 'magic_wheel_result',
          title: 'Vòng quay may mắn · Đã chọn học sinh',
          controls: [
            control('magic_wheel_close', 'Đóng', true),
            control('magic_wheel_spin', 'Quay lại', true),
          ],
        };
      }
      return {
        mode: 'magic_wheel_spinning',
        title: 'Vòng quay may mắn · Đang quay',
        controls: [control('magic_wheel_spin', 'Đang quay…', false)],
      };
    }

    const spin = document.getElementById('cv7991MagicWheelSpinBtn');
    return {
      mode: 'magic_wheel_ready',
      title: 'Vòng quay may mắn',
      controls: [control('magic_wheel_spin', 'Quay', !(spin instanceof HTMLButtonElement) || !spin.disabled)],
    };
  }

  function questionChoiceRows(presenter) {
    if (!(presenter instanceof HTMLElement)) return [];
    return Array.from(presenter.querySelectorAll(
      '.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]'
    )).filter((row) => {
      if (!(row instanceof HTMLElement) || !isVisible(row)) return false;
      // Chỉ các câu nhiều lựa chọn có ô tích; Đúng-Sai dùng bộ nút Đ/S riêng.
      return !!row.querySelector('.cv7991-choice-check-btn');
    });
  }

  function questionChoiceControls(presenter) {
    const rows = questionChoiceRows(presenter);
    const byLetter = new Map();
    rows.forEach((row) => {
      const letter = String(row.getAttribute('data-letter') || '').trim().toUpperCase();
      if (!['A', 'B', 'C', 'D'].includes(letter) || byLetter.has(letter)) return;
      byLetter.set(letter, row);
    });
    if (!byLetter.size) return { controls: [], selected: '' };
    let selectedLetter = '';
    const controls = ['A', 'B', 'C', 'D'].map((letter) => {
      const row = byLetter.get(letter);
      if (!row) return control('manual_choice_' + letter, letter, false);
      const selected = row.classList.contains('is-manual-selected')
        || row.getAttribute('aria-pressed') === 'true'
        || row.querySelector('.cv7991-choice-check-btn')?.getAttribute('aria-pressed') === 'true';
      if (selected) selectedLetter = letter;
      return control('manual_choice_' + letter, selected ? `✓ ${letter}` : letter, true);
    });
    return { controls, selected: selectedLetter };
  }


  function questionTrueFalseRows(presenter) {
    if (!(presenter instanceof HTMLElement)) return [];
    return Array.from(presenter.querySelectorAll(
      '.word-presentation-item[data-letter], .single-exam-word-option[data-letter], .single-exam-option[data-letter]'
    )).filter((row) => {
      if (!(row instanceof HTMLElement) || !isVisible(row)) return false;
      return !!row.querySelector('.cv7991-tf-choice-btn[data-tf-choice]');
    });
  }

  function tfKindKey(kind) {
    return kind === 'single' ? 'single' : 'word';
  }

  function tfRowLetter(row) {
    return String(row && row.getAttribute && row.getAttribute('data-letter') || '').trim().toLowerCase();
  }

  function tfSelectedMark(row) {
    if (!(row instanceof HTMLElement)) return '';
    const pressed = row.querySelector('.cv7991-tf-choice-btn[data-tf-choice][aria-pressed="true"], .cv7991-tf-choice-btn[data-tf-choice].is-checked');
    const mark = String(pressed && pressed.getAttribute('data-tf-choice') || '').trim().toUpperCase();
    return ['Đ', 'S'].includes(mark) ? mark : '';
  }

  function tfScanButtonForRow(row) {
    if (!(row instanceof HTMLElement)) return null;
    return row.querySelector('[data-word-tf-scan], [data-regular-tf-scan]');
  }

  // Dùng tiến độ câu hỏi thật của từng trình chiếu, thay vì chỉ lưu a/b/c/d theo kiểu bài.
  // Giữ nguyên vị trí khi quét tiếp CÙNG câu; trở về a khi sang CÂU KHÁC.
  function tfEnsureQuestionCursor(kind) {
    const key = tfKindKey(kind);
    const progressId = key === 'single' ? 'singleExamProgressText' : 'wordPresentationProgress';
    const progress = String(document.getElementById(progressId)?.textContent || '').trim();
    const title = key === 'single'
      ? String(document.getElementById('singleExamPresenter')?.getAttribute('data-file-uid') || '').trim()
      : String(document.getElementById('wordPresentationTitle')?.textContent || '').trim();
    const questionKey = `${key}|${title}|${progress}`;
    if (remote.tfQuestionKey[key] !== questionKey) {
      remote.tfQuestionKey[key] = questionKey;
      remote.tfCursor[key] = '';
    }
  }

  function tfSetCursor(presenter, kind, letterValue = '') {
    tfEnsureQuestionCursor(kind);
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return null;
    const key = tfKindKey(kind);
    let letter = String(letterValue || '').trim().toLowerCase();
    let row = rows.find((item) => tfRowLetter(item) === letter) || null;
    if (!row) {
      row = rows.find((item) => item.classList.contains('is-scan-target'))
        || rows.find((item) => {
          const btn = tfScanButtonForRow(item);
          return btn instanceof HTMLButtonElement && !btn.disabled;
        })
        || rows[0];
      letter = tfRowLetter(row);
    }
    remote.tfCursor[key] = letter;
    rows.forEach((item) => item.classList.toggle('mvip-remote-tf-current', item === row));
    return row;
  }

  function tfCurrentRow(presenter, kind) {
    tfEnsureQuestionCursor(kind);
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return null;
    const key = tfKindKey(kind);
    const active = rows.find((item) => item.classList.contains('is-scan-target')) || null;
    if (active) return tfSetCursor(presenter, kind, tfRowLetter(active));
    const stored = String(remote.tfCursor[key] || '').trim().toLowerCase();
    if (stored) {
      const hit = rows.find((item) => tfRowLetter(item) === stored);
      if (hit && !hit.classList.contains('is-scan-finished')) return tfSetCursor(presenter, kind, stored);
    }
    const unfinished = rows.find((item) => !item.classList.contains('is-scan-finished'));
    if (unfinished) return tfSetCursor(presenter, kind, tfRowLetter(unfinished));
    return tfSetCursor(presenter, kind, '');
  }

  function tfMoveCursor(presenter, kind, delta) {
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return false;
    const current = tfCurrentRow(presenter, kind) || rows[0];
    let index = rows.indexOf(current);
    if (index < 0) index = 0;
    const next = Math.max(0, Math.min(rows.length - 1, index + Number(delta || 0)));
    tfSetCursor(presenter, kind, tfRowLetter(rows[next]));
    scheduleState(true);
    return true;
  }

  function tfClickCurrentChoice(presenter, kind, markValue) {
    const rows = questionTrueFalseRows(presenter);
    const row = tfCurrentRow(presenter, kind);
    if (!rows.length || !(row instanceof HTMLElement)) return false;
    const mark = String(markValue || '').trim().toUpperCase();
    const button = Array.from(row.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]'))
      .find((item) => String(item.getAttribute('data-tf-choice') || '').trim().toUpperCase() === mark);
    if (!(button instanceof HTMLButtonElement) || button.disabled) return false;
    // Remote v43: retry cùng Đ/S không được đảo trạng thái.
    if (tfSelectedMark(row) === mark) {
      scheduleState(true);
      return true;
    }
    try { button.click(); } catch (_) { return false; }

    // Chọn Đ/S xong tự chuyển sang ý kế tiếp khi dùng chế độ quét tuần tự cũ.
    const index = rows.indexOf(row);
    if (index >= 0 && index < rows.length - 1) {
      tfSetCursor(presenter, kind, tfRowLetter(rows[index + 1]));
    } else {
      tfSetCursor(presenter, kind, tfRowLetter(row));
    }
    return true;
  }

  // Remote v34: ở chế độ KHÔNG quét, điện thoại hiện đồng thời cả 4 ý a/b/c/d.
  // Hàm này bấm trực tiếp Đ/S của đúng ý được chỉ định, không tự đổi ý.
  function tfClickChoiceByLetter(presenter, kind, letterValue, markValue) {
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return false;
    const letter = String(letterValue || '').trim().toLowerCase();
    const row = rows.find((item) => tfRowLetter(item) === letter) || null;
    if (!(row instanceof HTMLElement)) return false;
    const mark = String(markValue || '').trim().toUpperCase();
    const button = Array.from(row.querySelectorAll('.cv7991-tf-choice-btn[data-tf-choice]'))
      .find((item) => String(item.getAttribute('data-tf-choice') || '').trim().toUpperCase() === mark);
    if (!(button instanceof HTMLButtonElement) || button.disabled) return false;
    // Remote v43: retry cùng một ý a/b/c/d phải là thao tác idempotent.
    if (tfSelectedMark(row) === mark) {
      scheduleState(true);
      return true;
    }
    try { button.click(); } catch (_) { return false; }
    scheduleState(true);
    return true;
  }

  function tfBeginScanCurrent(presenter, kind) {
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return false;
    let row = tfCurrentRow(presenter, kind);
    let button = tfScanButtonForRow(row);
    if (!(button instanceof HTMLButtonElement) || button.disabled) {
      row = rows.find((item) => {
        const candidate = tfScanButtonForRow(item);
        return candidate instanceof HTMLButtonElement && !candidate.disabled;
      }) || null;
      if (!(row instanceof HTMLElement)) return false;
      tfSetCursor(presenter, kind, tfRowLetter(row));
      button = tfScanButtonForRow(row);
    }
    if (!(button instanceof HTMLButtonElement) || button.disabled) return false;
    if (row.classList.contains('is-scan-target')) return true;
    try { button.click(); return true; } catch (_) { return false; }
  }

  // Quét đúng ý a/b/c/d được chọn trên điện thoại (không tự nhảy sang ý khác).
  // Nếu nút đã chạy thì ACK thành công mà không bấm lặp lần thứ hai.
  function tfBeginScanByLetter(presenter, kind, letterValue) {
    tfEnsureQuestionCursor(kind);
    const letter = String(letterValue || '').trim().toLowerCase();
    if (!['a', 'b', 'c', 'd'].includes(letter)) return false;
    const row = questionTrueFalseRows(presenter).find((item) => tfRowLetter(item) === letter);
    if (!(row instanceof HTMLElement) || row.classList.contains('is-scan-finished')) return false;
    const button = tfScanButtonForRow(row);
    if (!(button instanceof HTMLButtonElement) || button.disabled) return false;
    if (row.classList.contains('is-scan-target')) {
      tfSetCursor(presenter, kind, letter);
      scheduleState(true);
      return true;
    }
    tfSetCursor(presenter, kind, letter);
    try { button.click(); scheduleState(true); return true; } catch (_) { return false; }
  }

  function questionTrueFalseState(presenter, kind, answerId) {
    const rows = questionTrueFalseRows(presenter);
    if (!rows.length) return null;

    const controls = [];
    let markedCount = 0;
    rows.slice(0, 4).forEach((row, index) => {
      const letter = tfRowLetter(row) || String.fromCharCode(97 + index);
      const selected = tfSelectedMark(row);
      if (selected) markedCount += 1;
      const trueBtn = row.querySelector('.cv7991-tf-choice-btn[data-tf-choice="Đ"]');
      const falseBtn = row.querySelector('.cv7991-tf-choice-btn[data-tf-choice="S"]');
      const canTrue = !(trueBtn instanceof HTMLButtonElement) || !trueBtn.disabled;
      const canFalse = !(falseBtn instanceof HTMLButtonElement) || !falseBtn.disabled;
      // 'local' báo cho Android biết nút Quét riêng của ý còn khả dụng.
      // Không tạo thêm control: tránh vượt giới hạn số điều khiển của server,
      // và giữ tương thích với các phiên bản Android cũ.
      const scanButton = tfScanButtonForRow(row);
      const canScan = scanButton instanceof HTMLButtonElement && !scanButton.disabled;
      controls.push(
        control(`tf_${letter}_true`, selected === 'Đ' ? `✓ ${letter}. Đ` : `${letter}. Đ`, canTrue, canScan),
        // Tái sử dụng local của control Đ/S thứ hai để báo đúng ý đang "Đang quét".
        // Không tăng số control, giữ nguyên cơ chế WebRTC + dự phòng WebSocket.
        control(`tf_${letter}_false`, selected === 'S' ? `✓ ${letter}. S` : `${letter}. S`, canFalse,
          row.classList.contains('is-scan-target') && !row.classList.contains('is-scan-finished')),
      );
    });

    const allMarked = rows.length > 0 && rows.every((item) => !!tfSelectedMark(item));
    controls.push(
      control('answer', 'Đáp án', buttonEnabled(answerId) && allMarked),
      questionSplitControl(kind),
      magicWheelControl(kind),
      duckRaceControl(kind),
    );

    return {
      mode: 'question_tf',
      title: `Đúng - Sai · Đã chọn ${markedCount}/${Math.min(rows.length, 4)} ý`,
      controls,
    };
  }

  // Remote v45: trạng thái điều khiển riêng cho bảng Đáp án và Chia đôi màn hình.
  function questionSplitControl(kind) {
    const id = kind === 'single' ? 'singleExamWhiteboardSplitBtn' : 'wordPresentationWhiteboardSplitBtn';
    const button = document.getElementById(id);
    const enabled = button instanceof HTMLButtonElement && !button.hidden && !button.disabled;
    return control('question_split', 'Chia đôi màn hình', enabled);
  }

  function questionAnswerModalRemoteState(kind) {
    // Hiện tại hộp đáp án có nút Đóng riêng ở Trình chiếu câu hỏi Word.
    if (kind !== 'word') return null;
    const modal = document.getElementById('wordPresentationAnswerModal');
    if (!isVisible(modal)) return null;
    const closeButton = document.getElementById('wordPresentationAnswerCloseBtn');
    return {
      mode: 'question_answer_modal',
      title: 'Đáp án',
      controls: [
        control('answer_close', 'Đóng', !(closeButton instanceof HTMLButtonElement) || !closeButton.disabled),
      ],
    };
  }

  function questionSplitRemoteState() {
    const panel = document.getElementById('mvipWhiteboardPanel');
    if (!(isVisible(panel) && panel.classList.contains('is-split'))) return null;

    let presenter = document.getElementById('singleExamPresenter');
    let kind = 'single';
    if (!(presenter instanceof HTMLElement && isVisible(presenter) && presenter.classList.contains('mvip-whiteboard-split'))) {
      presenter = document.getElementById('wordPresentationPresenter');
      kind = 'word';
    }
    if (!(presenter instanceof HTMLElement && isVisible(presenter) && presenter.classList.contains('mvip-whiteboard-split'))) return null;

    // Không chen bộ nút câu hỏi vào PowerPoint/tài liệu thông thường.
    if (kind === 'word') {
      const pptControls = document.getElementById('powerPointPresentationControls');
      if (presenter.classList.contains('is-powerpoint-slide-mode') || isVisible(pptControls)
          || presenter.classList.contains('is-ordinary-document')) return null;
    }

    const answerId = kind === 'single' ? 'singleExamAnswerBtn' : 'wordPresentationAnswerBtn';
    const answerButton = document.getElementById(answerId);
    const answerLayer = document.getElementById('mvipWhiteboardSplitAnswerLayer');
    const answerShown = answerLayer instanceof HTMLElement && !answerLayer.hidden && isVisible(answerLayer);
    const controls = [];

    if (answerShown) {
      const partButtons = Array.from(answerLayer.querySelectorAll('button[data-word-essay-answer]'))
        .filter((button) => button instanceof HTMLButtonElement && isVisible(button));
      if (partButtons.length) {
        // Điện thoại có 10 ô điều khiển động. Luôn chừa 1 ô cho Đóng và
        // luôn giữ nút Tất cả; vì vậy tối đa hiển thị 8 ý riêng + Tất cả + Đóng.
        const allButton = partButtons.find((button) =>
          String(button.getAttribute('data-word-essay-answer') || '').trim() === 'all'
        );
        const individualButtons = partButtons
          .filter((button) => String(button.getAttribute('data-word-essay-answer') || '').trim() !== 'all')
          .slice(0, 8);
        const visibleAnswerButtons = allButton
          ? individualButtons.concat([allButton])
          : individualButtons.slice(0, 9);
        visibleAnswerButtons.forEach((button) => {
          const key = String(button.getAttribute('data-word-essay-answer') || '').trim();
          const label = String(button.textContent || '').trim();
          if (!key || !label) return;
          controls.push(control(`split_answer_part_${key}`, label, !button.disabled));
        });
      } else {
        // Với câu không có nhiều ý, vẫn giữ nút Đáp án để có thể làm mới/đổi chế độ.
        controls.push(control('split_answer', 'Đáp án', !(answerButton instanceof HTMLButtonElement) || !answerButton.disabled));
      }
    } else {
      controls.push(control('split_answer', 'Đáp án', !(answerButton instanceof HTMLButtonElement) || !answerButton.disabled));
    }

    controls.push(control('split_close', 'Đóng', true));
    return {
      mode: answerShown ? 'question_split_answer' : 'question_split',
      title: answerShown ? 'Chia đôi màn hình · Đáp án' : 'Chia đôi màn hình',
      controls,
    };
  }

  function questionStateForPresenter(presenter, kind) {
    const single = kind === 'single';
    const resultId = single ? 'singleExamViewBtn' : 'wordPresentationResultBtn';
    const answerId = single ? 'singleExamAnswerBtn' : 'wordPresentationAnswerBtn';
    const prevId = single ? 'regularTestPrevBtn' : 'wordPresentationPrevBtn';
    const nextId = single ? 'regularTestNextBtn' : 'wordPresentationNextBtn';
    const fullscreenId = single ? 'singleExamFullscreenBtn' : 'wordPresentationFullscreenBtn';

    const resultBtn = document.getElementById(resultId);
    const answerBtn = document.getElementById(answerId);

    // Nếu Đáp án vừa mở thành một bảng riêng trên máy tính, điện thoại đổi sang nút Đóng.
    const answerModalState = questionAnswerModalRemoteState(kind);
    if (answerModalState) return answerModalState;

    // 1) Đang mở bảng Kết quả câu hỏi: đúng quy trình KQ quét -> Lưu.
    const resultModal = document.getElementById('resultModal');
    if (isVisible(resultModal)) {
      const save = document.getElementById('resultSaveBtn');
        const cancel = document.getElementById('resultCancelBtn');
      return {
        mode: 'question_result',
        title: 'Kết quả câu hỏi',
        controls: [
          control('result_save', 'Lưu', !(save instanceof HTMLButtonElement) || !save.disabled),
          control('result_cancel', 'Hủy', !(cancel instanceof HTMLButtonElement) || !cancel.disabled),
        ],
      };
    }

    const answerVisible = !!(answerBtn && answerBtn.getAttribute('aria-pressed') === 'true');
    if (answerVisible) {
      return {
        mode: 'question_answer',
        title: 'Đang xem đáp án',
        controls: [
          control('answer', String(answerBtn.textContent || 'Ẩn đáp án').trim() || 'Ẩn đáp án', buttonEnabled(answerId)),
          questionSplitControl(kind),
          control('question_prev', 'Câu trước', buttonEnabled(prevId)),
          control('question_next', 'Câu sau', buttonEnabled(nextId)),
          magicWheelControl(kind),
          duckRaceControl(kind),
        ],
      };
    }

    // 2) Nếu đã có dữ liệu thẻ, ưu tiên quy trình Quét -> KQ quét -> Lưu.
    const canViewScan = resultBtn instanceof HTMLButtonElement
      && !resultBtn.disabled
      && String(resultBtn.textContent || '').trim() !== 'Đã xem';
    if (canViewScan) {
      return {
        mode: 'question_scan_ready',
        title: 'Đã nhận kết quả quét',
        controls: [
          control('scan_result', 'KQ quét', true),
          questionSplitControl(kind),
          magicWheelControl(kind),
          duckRaceControl(kind),
          control('question_prev', 'Câu trước', buttonEnabled(prevId)),
          control('question_next', 'Câu sau', buttonEnabled(nextId)),
        ],
      };
    }

    // 3) Câu Đúng-Sai: điều khiển từng ý a/b/c/d bằng Đúng/Sai.
    // START trên điện thoại sẽ tự kích hoạt Quét cho đúng ý đang chọn.
    const tfState = questionTrueFalseState(presenter, kind, answerId);
    if (tfState) return tfState;

    // 4) Không quét: chọn A/B/C/D trước, rồi mới bấm Đáp án.
    const choiceInfo = questionChoiceControls(presenter);
    if (choiceInfo.controls.length) {
      return {
        mode: 'question_manual',
        title: choiceInfo.selected ? `Đã chọn ${choiceInfo.selected} · bấm Đáp án` : 'Chọn A/B/C/D',
        controls: choiceInfo.controls.concat([
          // Đúng quy trình: phải tích A/B/C/D trước thì nút Đáp án trên điện thoại mới sáng.
          control('answer', 'Đáp án', buttonEnabled(answerId) && !!choiceInfo.selected),
          questionSplitControl(kind),
          magicWheelControl(kind),
          duckRaceControl(kind),
        ]),
      };
    }

    // Các dạng khác (Trả lời ngắn/Tự luận): giữ điều khiển cơ bản.
    return {
      mode: 'question',
      title: 'Câu hỏi tương tác',
      controls: [
        control('answer', String(answerBtn && answerBtn.textContent || 'Đáp án').trim() || 'Đáp án', buttonEnabled(answerId)),
        questionSplitControl(kind),
        magicWheelControl(kind),
          duckRaceControl(kind),
        control('question_prev', 'Câu trước', buttonEnabled(prevId)),
        control('question_next', 'Câu sau', buttonEnabled(nextId)),
      ],
    };
  }

  function currentRemoteState() {
    // Khi Đua vịt đang mở, điện thoại bám đúng tiến trình:
    // Bắt đầu -> Đang đua -> Đóng + Đua lại.
    const duckRemoteState = duckRaceRemoteState();
    if (duckRemoteState) return duckRemoteState;

    // Khi Vòng quay đang mở, điện thoại chỉ hiện đúng một nút theo tiến trình:
    // Quay -> Đang quay… -> Đóng + Quay lại.
    // Đóng xong sẽ tự quay về bộ nút bài giảng với nút Vòng quay;
    // Quay lại sẽ quay tiếp ngay trên vòng quay đang mở.
    const wheelRemoteState = magicWheelRemoteState();
    if (wheelRemoteState) return wheelRemoteState;

    // Chia đôi câu hỏi có bộ điều khiển riêng; không khóa remote như bảng trắng thường.
    const splitQuestionState = questionSplitRemoteState();
    if (splitQuestionState) return splitQuestionState;

    const whiteboard = document.getElementById('mvipWhiteboardPanel');
    if (isVisible(whiteboard) && document.body.classList.contains('mvip-whiteboard-open')) {
      // Theo yêu cầu 2026-10-05: điện thoại không điều khiển bảng trắng.
      // Khi bảng trắng đang mở, tạm khóa remote để tránh lệnh tác động nhầm
      // vào câu hỏi/tài liệu nằm phía sau.
      return {
        mode: 'paused',
        title: 'Đang mở bảng trắng trên máy tính',
        controls: [],
      };
    }

    const wordPresenter = document.getElementById('wordPresentationPresenter');
    if (isVisible(wordPresenter)) {
      const pptControls = document.getElementById('powerPointPresentationControls');
      const isPowerPoint = wordPresenter.classList.contains('is-powerpoint-slide-mode') || isVisible(pptControls);
      if (isPowerPoint) {
        // Nếu vừa chọn đáp án đúng thì máy tính đã mở bảng Kết quả câu hỏi;
        // điện thoại chuyển ngay sang Lưu / Hủy.
        const pptResultState = powerPointRemoteResultState();
        if (pptResultState) return pptResultState;

        // Sau khi điện thoại bấm STOP, chỉ hiện A/B/C/D để giáo viên chốt
        // đáp án đúng. Bấm một phương án sẽ dùng chính nút A/B/C/D hiện có
        // của MVIP, vì vậy bảng Kết quả câu hỏi và cách tính tỷ lệ không đổi.
        if (remote.pptAwaitAnswer) return powerPointRemoteAnswerState();

        const prev = document.getElementById('powerPointPresentationPrevBtn');
        const next = document.getElementById('powerPointPresentationNextBtn');
        return {
          mode: 'powerpoint',
          title: 'Trình chiếu PowerPoint',
          controls: [
            magicWheelControl('word'),
            duckRaceControl('word'),
            control('ppt_prev', 'Slide trước', !(prev instanceof HTMLButtonElement) || !prev.disabled),
            control('ppt_next', 'Slide sau', !(next instanceof HTMLButtonElement) || !next.disabled),
          ],
        };
      }

      // Rời PowerPoint thì bỏ trạng thái chờ chọn đáp án cũ.
      remote.pptAwaitAnswer = false;

      if (wordPresenter.classList.contains('is-ordinary-document')) {
        const prev = document.getElementById('wordPresentationPrevBtn');
        const next = document.getElementById('wordPresentationNextBtn');
        return {
          mode: 'document',
          title: 'Trình chiếu tài liệu',
          controls: [
            control('doc_prev', 'Trang trước', !(prev instanceof HTMLButtonElement) || !prev.disabled),
            control('doc_next', 'Trang sau', !(next instanceof HTMLButtonElement) || !next.disabled),
            magicWheelControl('word'),
            duckRaceControl('word'),
          ],
        };
      }

      return questionStateForPresenter(wordPresenter, 'word');
    }

    const singlePresenter = document.getElementById('singleExamPresenter');
    if (isVisible(singlePresenter)) {
      remote.pptAwaitAnswer = false;
      return questionStateForPresenter(singlePresenter, 'single');
    }

    remote.pptAwaitAnswer = false;
    return { mode: 'home', title: 'MVIP', controls: [] };
  }

  function remoteIsActive() {
    // Chỉ cần tab còn hiển thị. document.hasFocus() có thể dao động khi Chrome
    // chuyển native fullscreen / hiện hộp hệ thống, làm app điện thoại đổi trạng thái liên tục.
    return document.visibilityState === 'visible';
  }

  function remoteWsUrl() {
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token) return '';
    const u = new URL(API_BASE);
    u.protocol = u.protocol === 'https:' ? 'wss:' : 'ws:';
    u.pathname = '/api/ws/remote';
    u.search = '?token=' + encodeURIComponent(token);
    return u.toString();
  }

  function remoteCountdownSelectForState(value) {
    const mode = String(value && value.mode || '');
    const supported = new Set([
      'question', 'question_manual', 'question_tf', 'question_scan_ready', 'question_answer',
      'powerpoint', 'document'
    ]);
    if (!supported.has(mode)) return null;
    if (presenterVisible('singleExamPresenter')) {
      const el = document.getElementById('singleExamCountdownInput');
      return el instanceof HTMLSelectElement ? el : null;
    }
    if (presenterVisible('wordPresentationPresenter')) {
      const el = document.getElementById('wordPresentationCountdownInput');
      return el instanceof HTMLSelectElement ? el : null;
    }
    return null;
  }

  function remoteInstallCountdownSync(select) {
    if (!(select instanceof HTMLSelectElement) || select.dataset.mvipRemoteCountdownSync === '1') return;
    select.dataset.mvipRemoteCountdownSync = '1';
    const raw = String(select.value || '').trim();
    if (/^\d+$/.test(raw)) select.dataset.mvipRemoteCountdownSelected = raw;
    select.addEventListener('change', () => {
      const next = String(select.value || '').trim();
      if (/^\d+$/.test(next)) select.dataset.mvipRemoteCountdownSelected = next;
      else if (!next || !next.startsWith('countdown-')) select.dataset.mvipRemoteCountdownSelected = '';
      scheduleState(true);
    });
  }

  function remoteCountdownInfo(value) {
    const select = remoteCountdownSelectForState(value);
    if (!(select instanceof HTMLSelectElement)) return { supported:false, seconds:0, label:'' };
    remoteInstallCountdownSync(select);
    const raw = String(select.value || '').trim();
    if (/^\d+$/.test(raw)) select.dataset.mvipRemoteCountdownSelected = raw;
    const seconds = Math.max(0, Number.parseInt(select.dataset.mvipRemoteCountdownSelected || '0', 10) || 0);
    return {
      supported:true,
      seconds,
      label: seconds > 0 ? `⏱ ${seconds} giây` : '⏱ Chọn thời gian'
    };
  }

  function sendRaw(payload) {
    const ws = remote.ws;
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    // Không bao giờ gửi trạng thái/lệnh dưới token cũ trong lúc đổi tài khoản.
    if (!token || token !== remote.authToken || !ws || ws.readyState !== WebSocket.OPEN) return false;
    try {
      ws.send(JSON.stringify(payload));
      return true;
    } catch (_) {
      return false;
    }
  }

  function sendState(force = false, forceServer = false) {
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token || token !== remote.authToken) return;
    const value = currentRemoteState();
    value.countdown = remoteCountdownInfo(value);
    // server hiện chỉ chuyển mode/title/controls. Gói thời gian đã chọn thành
    // một control metadata (không hiển thị) để app Android vẫn đồng bộ được
    // mà không phải sửa server.py.
    if (value.countdown && value.countdown.supported && Array.isArray(value.controls)) {
      value.controls = value.controls.concat([
        control(`countdown_state_${value.countdown.seconds || 0}`, '__countdown__', false)
      ]);
    }
    const active = remoteIsActive();
    const signature = JSON.stringify({ active, value });
    if (!force && signature === remote.lastSignature) return;
    const sentDirect = forceServer ? 0 : rtcSendState(value);
    // Nếu TẤT CẢ điện thoại đã dùng đường trực tiếp, không cần gửi trạng thái qua server.
    // Nếu còn app cũ hoặc máy không kết nối LAN được, server vẫn cấp trạng thái như V28.
    if (sentDirect > 0 && sentDirect >= rtcPhoneCount && rtcPhoneCount > 0) {
      remote.lastSignature = signature;
    } else if (sendRaw({ type: 'remote_state', active, state: value })) {
      remote.lastSignature = signature;
    }
  }

  function scheduleState(force = false) {
    if (force) { sendState(true); return; }
    clearTimeout(remote.stateTimer);
    remote.stateTimer = setTimeout(() => sendState(false), 80);
  }

  // Cho các trò chơi (Đua vịt/Vòng quay) báo ngay trạng thái mới về điện thoại.
  window.mvipRemoteRefreshState = () => scheduleState(true);

  function clickById(id) {
    const el = document.getElementById(id);
    if (!(el instanceof HTMLElement)) return false;
    if (el instanceof HTMLButtonElement && el.disabled) return false;
    try { el.click(); return true; } catch (_) { return false; }
  }

  function presenterVisible(id) {
    return isVisible(document.getElementById(id));
  }

  function activeQuestionPresenter() {
    const single = document.getElementById('singleExamPresenter');
    if (isVisible(single)) return single;
    const word = document.getElementById('wordPresentationPresenter');
    if (isVisible(word) && !word.classList.contains('is-ordinary-document')
      && !word.classList.contains('is-powerpoint-slide-mode')) return word;
    return null;
  }

  function clickManualChoice(letterValue) {
    const presenter = activeQuestionPresenter();
    if (!(presenter instanceof HTMLElement)) return false;
    const wanted = String(letterValue || '').trim().toUpperCase();
    const rows = questionChoiceRows(presenter);
    const row = rows.find((item) => String(item.getAttribute('data-letter') || '').trim().toUpperCase() === wanted);
    if (!(row instanceof HTMLElement)) return false;
    const check = row.querySelector('.cv7991-choice-check-btn');

    // Remote v43: lệnh chọn đáp án có thể được điện thoại tự gửi lại nếu chưa
    // nhận command_ack. Nếu phương án này đã được tích thì coi là thành công,
    // tuyệt đối không click lần nữa để tránh biến retry thành thao tác bỏ tích.
    const alreadySelected = row.classList.contains('is-manual-selected')
      || row.getAttribute('aria-pressed') === 'true'
      || check?.getAttribute('aria-pressed') === 'true'
      || check?.classList.contains('is-checked');
    if (alreadySelected) {
      scheduleState(true);
      return true;
    }

    try {
      if (check instanceof HTMLElement) check.click();
      else row.click();
      return true;
    } catch (_) {
      return false;
    }
  }

  function nativeFullscreenElement() {
    return document.fullscreenElement || document.webkitFullscreenElement || null;
  }

  function remoteFullscreenPresenter(kind) {
    if (kind === 'single') return document.getElementById('singleExamPresenter');
    return document.getElementById('wordPresentationPresenter');
  }

  function remoteFullscreenButton(kind) {
    if (kind === 'single') return 'singleExamFullscreenBtn';
    if (kind === 'ppt') return 'powerPointPresentationFullscreenBtn';
    return 'wordPresentationFullscreenBtn';
  }

  function showRemoteFullscreenHint() {
    const message = 'Chrome chỉ cho vào toàn màn hình thật khi có thao tác trực tiếp trên máy tính. Bấm nút Mở rộng trên máy tính 1 lần đầu tiết; sau đó MVIP có thể giữ toàn màn hình xuyên suốt Quét → KQ quét → Lưu.';
    try {
      if (typeof showLoginStatus === 'function') {
        showLoginStatus(message, 'info');
      } else if (typeof window.mvipNotify === 'function') {
        window.mvipNotify(message);
      }
    } catch (_) {}
  }

  function runRemoteFullscreen(kind) {
    const presenter = remoteFullscreenPresenter(kind);
    if (!(presenter instanceof HTMLElement)) return false;

    // Khi danh sách học sinh đang hiện bên phải trong native fullscreen,
    // nút Mở rộng trên điện thoại chỉ đóng bảng này. Trình duyệt vẫn giữ
    // fullscreen thật nên Chrome không chặn thao tác.
    if (typeof window.mvipRemoteScanRosterVisible === 'function'
      && window.mvipRemoteScanRosterVisible()) {
      if (typeof window.mvipRemoteHideScanRoster === 'function') {
        window.mvipRemoteHideScanRoster();
        return true;
      }
    }

    const fs = nativeFullscreenElement();
    const isNative = !!(fs && (fs === presenter || presenter.contains(fs)));

    // Thu nhỏ native fullscreen không cần user activation.
    if (isNative) return clickById(remoteFullscreenButton(kind));

    // Nếu đang ở fullscreen dự phòng của bản cũ thì cho phép thu nhỏ về bình thường.
    const isFallback = presenter.classList.contains('is-fallback-fullscreen')
      || presenter.classList.contains('single-exam-expanded')
      || (kind === 'single' && document.body.classList.contains('single-exam-fullscreen-fallback'));
    if (isFallback) return clickById(remoteFullscreenButton(kind));

    // WebSocket không tạo "user activation". Nếu gọi requestFullscreen từ lệnh
    // điện thoại, Chrome sẽ từ chối và mã cũ chỉ rơi vào fullscreen giả (còn
    // thanh tab/địa chỉ). Không tạo trạng thái giả đó nữa; báo rõ cách dùng đúng.
    showRemoteFullscreenHint();
    return true;
  }


  function activeQuestionPresenterWithKind() {
    const single = document.getElementById('singleExamPresenter');
    if (isVisible(single)) return { presenter: single, kind: 'single' };
    const word = document.getElementById('wordPresentationPresenter');
    if (isVisible(word) && !word.classList.contains('is-ordinary-document')
      && !word.classList.contains('is-powerpoint-slide-mode')) return { presenter: word, kind: 'word' };
    return { presenter: null, kind: '' };
  }

  function runTfRemoteCommand(command) {
    const current = activeQuestionPresenterWithKind();
    if (!(current.presenter instanceof HTMLElement)) return false;
    if (!questionTrueFalseRows(current.presenter).length) return false;

    const scan = String(command || '').match(/^tf_scan_([a-d])$/i);
    if (scan) return tfBeginScanByLetter(current.presenter, current.kind, scan[1]);

    const direct = String(command || '').match(/^tf_([a-d])_(true|false)$/i);
    if (direct) {
      const letter = direct[1].toLowerCase();
      const mark = direct[2].toLowerCase() === 'true' ? 'Đ' : 'S';
      return tfClickChoiceByLetter(current.presenter, current.kind, letter, mark);
    }

    switch (command) {
      // Giữ tương thích với APK/index cũ nếu còn phiên đang mở.
      case 'tf_true': return tfClickCurrentChoice(current.presenter, current.kind, 'Đ');
      case 'tf_false': return tfClickCurrentChoice(current.presenter, current.kind, 'S');
      case 'tf_prev_item': return tfMoveCursor(current.presenter, current.kind, -1);
      case 'tf_next_item': return tfMoveCursor(current.presenter, current.kind, 1);
      case 'tf_scan_current': return tfBeginScanCurrent(current.presenter, current.kind);
      default: return false;
    }
  }

  function clickPowerPointCorrect(letterValue) {
    const letter = String(letterValue || '').trim().toUpperCase();
    if (!['A','B','C','D'].includes(letter)) return false;

    // Nếu retry đến sau khi bảng Kết quả đã mở thì lệnh đầu tiên đã thành công.
    // Không click correctBtn lần hai vì có thể gây hành vi phụ ngoài ý muốn.
    const resultModal = document.getElementById('resultModal');
    if (isVisible(resultModal)) {
      const badge = document.getElementById('resultCorrectBadge');
      const shown = String(badge && badge.textContent || '').trim().toUpperCase();
      if (!shown || shown === letter) {
        scheduleState(true);
        return true;
      }
    }
    return clickById('correctBtn' + letter);
  }

  function runRemoteCommand(command) {
    let ok = false;
    const normalizedCommand = String(command || '').trim();

    if (normalizedCommand.startsWith('countdown_')) {
      const seconds = Number.parseInt(normalizedCommand.slice('countdown_'.length), 10);
      const allowed = new Set([0,15,30,45,60,120,180,240,300,360,420,480,540,600]);
      if (allowed.has(seconds)) {
        const current = currentRemoteState();
        const select = remoteCountdownSelectForState(current);
        if (select instanceof HTMLSelectElement) {
          remoteInstallCountdownSync(select);
          select.value = seconds > 0 ? String(seconds) : '';
          select.dataset.mvipRemoteCountdownSelected = seconds > 0 ? String(seconds) : '';
          try {
            select.dispatchEvent(new Event('change', { bubbles:true }));
            ok = true;
          } catch (_) { ok = false; }
        }
      }
      if (ok) {
        scheduleState(true);
        setTimeout(() => scheduleState(true), 180);
      }
      return ok;
    }

    if (/^tf_scan_[a-d]$/i.test(normalizedCommand)) {
      ok = runTfRemoteCommand(normalizedCommand);
      if (ok) {
        scheduleState(true);
        setTimeout(() => scheduleState(true), 120);
      }
      return ok;
    }

    if (/^tf_[a-d]_(?:true|false)$/i.test(normalizedCommand)) {
      ok = runTfRemoteCommand(normalizedCommand);
      if (ok) {
        scheduleState(true);
        setTimeout(() => scheduleState(true), 120);
      }
      return ok;
    }

    if (normalizedCommand.startsWith('split_answer_part_')) {
      const key = normalizedCommand.slice('split_answer_part_'.length);
      const answerLayer = document.getElementById('mvipWhiteboardSplitAnswerLayer');
      const button = answerLayer instanceof HTMLElement
        ? Array.from(answerLayer.querySelectorAll('button[data-word-essay-answer]'))
            .find((item) => String(item.getAttribute('data-word-essay-answer') || '').trim() === key)
        : null;
      if (button instanceof HTMLButtonElement && !button.disabled) {
        try { button.click(); ok = true; } catch (_) { ok = false; }
      }
      if (ok) {
        scheduleState(true);
        setTimeout(() => scheduleState(true), 120);
      }
      return ok;
    }

    switch (normalizedCommand) {
      case 'tf_true':
      case 'tf_false':
      case 'tf_prev_item':
      case 'tf_next_item':
      case 'tf_scan_current':
        ok = runTfRemoteCommand(normalizedCommand);
        break;
      case 'answer':
        ok = presenterVisible('singleExamPresenter')
          ? clickById('singleExamAnswerBtn')
          : clickById('wordPresentationAnswerBtn');
        break;
      case 'answer_close':
        ok = clickById('wordPresentationAnswerCloseBtn');
        break;
      case 'question_split':
        ok = presenterVisible('singleExamPresenter')
          ? clickById('singleExamWhiteboardSplitBtn')
          : clickById('wordPresentationWhiteboardSplitBtn');
        break;
      case 'split_answer': {
        const single = document.getElementById('singleExamPresenter');
        const word = document.getElementById('wordPresentationPresenter');
        if (single instanceof HTMLElement && isVisible(single) && single.classList.contains('mvip-whiteboard-split')) {
          ok = clickById('singleExamAnswerBtn');
        } else if (word instanceof HTMLElement && isVisible(word) && word.classList.contains('mvip-whiteboard-split')) {
          ok = clickById('wordPresentationAnswerBtn');
        }
        break;
      }
      case 'split_close':
        ok = clickById('mvipWhiteboardCloseBtn');
        break;
      case 'manual_choice_A': ok = clickManualChoice('A'); break;
      case 'manual_choice_B': ok = clickManualChoice('B'); break;
      case 'manual_choice_C': ok = clickManualChoice('C'); break;
      case 'manual_choice_D': ok = clickManualChoice('D'); break;
      case 'scan_result':
        ok = presenterVisible('singleExamPresenter')
          ? clickById('singleExamViewBtn')
          : clickById('wordPresentationResultBtn');
        break;
      case 'result_save':
        ok = clickById('resultSaveBtn');
        if (ok && presenterVisible('wordPresentationPresenter')) remote.pptAwaitAnswer = false;
        break;
      case 'result_repick':
        ok = clickById('resultRepickBtn');
        if (ok) {
          const wordPresenter = document.getElementById('wordPresentationPresenter');
          const pptControls = document.getElementById('powerPointPresentationControls');
          const isPowerPoint = isVisible(wordPresenter)
            && (wordPresenter.classList.contains('is-powerpoint-slide-mode') || isVisible(pptControls));
          if (isPowerPoint) remote.pptAwaitAnswer = true;
        }
        break;
      case 'result_cancel':
        ok = clickById('resultCancelBtn');
        if (ok && presenterVisible('wordPresentationPresenter')) remote.pptAwaitAnswer = false;
        break;
      case 'ppt_scan_start':
        remote.pptAwaitAnswer = false;
        ok = true;
        break;
      case 'ppt_scan_stop':
        // Chỉ mở bước chọn đáp án khi đã nhận ít nhất một thẻ hợp lệ.
        remote.pptAwaitAnswer = powerPointRemoteAnsweredCount() > 0;
        ok = true;
        break;
      case 'ppt_correct_A':
        ok = clickPowerPointCorrect('A');
        if (ok) remote.pptAwaitAnswer = false;
        break;
      case 'ppt_correct_B':
        ok = clickPowerPointCorrect('B');
        if (ok) remote.pptAwaitAnswer = false;
        break;
      case 'ppt_correct_C':
        ok = clickPowerPointCorrect('C');
        if (ok) remote.pptAwaitAnswer = false;
        break;
      case 'ppt_correct_D':
        ok = clickPowerPointCorrect('D');
        if (ok) remote.pptAwaitAnswer = false;
        break;
      case 'scan_view_on':
        ok = typeof window.mvipRemoteShowScanRoster === 'function'
          ? window.mvipRemoteShowScanRoster()
          : false;
        break;
      case 'magic_wheel_open': {
        const api = window.mvipMagicWheel;
        if (api && typeof api.open === 'function') {
          const source = presenterVisible('singleExamPresenter') ? 'mvip' : 'word';
          try { api.open(source); ok = true; } catch (_) { ok = false; }
        }
        break;
      }
      case 'duck_race_open': {
        const api = window.mvipDuckRace;
        if (api && typeof api.open === 'function') {
          const source = presenterVisible('singleExamPresenter') ? 'mvip' : 'word';
          try { api.open(source); ok = true; } catch (_) { ok = false; }
        } else {
          const id = presenterVisible('singleExamPresenter') ? 'mvipSingleDuckRaceBtn' : 'mvipDuckRaceBtn';
          ok = clickById(id);
        }
        break;
      }
      case 'duck_race_start': {
        const api = window.mvipDuckRace;
        if (api && typeof api.start === 'function') {
          try { api.start(); ok = true; } catch (_) { ok = false; }
        }
        break;
      }
      case 'duck_race_close': {
        const api = window.mvipDuckRace;
        if (api && typeof api.close === 'function') {
          try { api.close(); ok = true; } catch (_) { ok = false; }
        }
        break;
      }
      case 'magic_wheel_spin': {
        const api = window.mvipMagicWheel;
        if (api && typeof api.spin === 'function') {
          try { api.spin(); ok = true; } catch (_) { ok = false; }
        }
        break;
      }
      case 'magic_wheel_close': {
        const api = window.mvipMagicWheel;
        if (api && typeof api.close === 'function') {
          try { api.close(); ok = true; } catch (_) { ok = false; }
        }
        break;
      }
      case 'question_fullscreen':
        ok = presenterVisible('singleExamPresenter')
          ? runRemoteFullscreen('single')
          : runRemoteFullscreen('word');
        break;
      case 'question_prev':
        ok = presenterVisible('singleExamPresenter')
          ? clickById('regularTestPrevBtn')
          : clickById('wordPresentationPrevBtn');
        break;
      case 'question_next':
        ok = presenterVisible('singleExamPresenter')
          ? clickById('regularTestNextBtn')
          : clickById('wordPresentationNextBtn');
        break;
      case 'ppt_prev': ok = clickById('powerPointPresentationPrevBtn'); break;
      case 'ppt_next': ok = clickById('powerPointPresentationNextBtn'); break;
      case 'ppt_play': ok = clickById('powerPointPresentationPlayBtn'); break;
      case 'ppt_fullscreen': ok = runRemoteFullscreen('ppt'); break;
      case 'doc_prev': ok = clickById('wordPresentationPrevBtn'); break;
      case 'doc_next': ok = clickById('wordPresentationNextBtn'); break;
      case 'doc_fullscreen': ok = runRemoteFullscreen('word'); break;
      default: break;
    }
    if (ok) {
      scheduleState(true);
      // Một số thao tác (đặc biệt Lưu) là async; gửi lại sau khi giao diện đã đổi.
      setTimeout(() => scheduleState(true), 180);
      setTimeout(() => scheduleState(true), 850);
    }
    return ok;
  }

  function clearRetry() {
    if (remote.retryTimer) clearTimeout(remote.retryTimer);
    remote.retryTimer = 0;
  }

  function stopHeartbeat() {
    if (remote.heartbeatTimer) clearInterval(remote.heartbeatTimer);
    remote.heartbeatTimer = 0;
  }

  function disconnect() {
    remote.closedByUser = true;
    clearRetry();
    stopHeartbeat();
    stopRemoteActivePoll();
    remote.phoneActiveUntil = 0;
    remote.idleDirty = false;
    clearTimeout(remote.stateTimer);
    remote.stateTimer = 0;
    remote.lastSignature = '';
    // Ngắt WS trước rồi đóng tất cả DataChannel WF: điện thoại tài khoản cũ
    // không còn đường trực tiếp nào để gửi lệnh sau khi PC chuyển tài khoản.
    const ws = remote.ws;
    remote.ws = null;
    remote.authToken = '';
    rtcCloseAll();
    rtcPhoneCount = 0;
    rtcCommandSeen.clear();
    if (ws) {
      try { ws.onopen = ws.onclose = ws.onerror = ws.onmessage = null; ws.close(); } catch (_) {}
    }
  }

  function scheduleReconnect() {
    clearRetry();
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token || remote.closedByUser) return;
    const delay = Math.min(12000, 1200 + remote.retryCount * 1200);
    remote.retryCount += 1;
    remote.retryTimer = setTimeout(() => connect(true), delay);
  }

  function isReliableRemoteSelectionCommand(commandValue) {
    const command = String(commandValue || '').trim();
    return /^manual_choice_[A-D]$/.test(command)
      || /^tf_[a-d]_(?:true|false)$/i.test(command)
      || /^ppt_correct_[A-D]$/.test(command);
  }

  function reliableRemoteCommandGroup(commandValue) {
    const command = String(commandValue || '').trim();
    if (/^manual_choice_[A-D]$/.test(command)) return 'manual_choice';
    if (/^ppt_correct_[A-D]$/.test(command)) return 'ppt_correct';
    const tf = command.match(/^tf_([a-d])_(?:true|false)$/i);
    return tf ? `tf_${tf[1].toLowerCase()}` : '';
  }

  function runRemoteCommandWithRetry(commandValue, attempt = 0, retrySerial = 0) {
    const command = String(commandValue || '').trim();
    if (!command) return false;

    const group = reliableRemoteCommandGroup(command);
    let serial = Number(retrySerial || 0);
    if (group && attempt === 0) {
      serial = (Number(remote.commandRetrySerial[group] || 0) + 1);
      remote.commandRetrySerial[group] = serial;
    } else if (group && Number(remote.commandRetrySerial[group] || 0) !== serial) {
      // Giáo viên đã bấm một đáp án mới hơn trong cùng nhóm; bỏ retry cũ.
      return false;
    }

    const ok = runRemoteCommand(command);
    if (ok || !isReliableRemoteSelectionCommand(command) || attempt >= 3) return ok;

    // Trong lúc câu hỏi vừa render lại / vừa kết thúc quét, nút DOM có thể
    // chưa sẵn sàng đúng khoảnh khắc remote_command tới. Thử lại cục bộ rất
    // nhanh; các lệnh chọn đã được làm idempotent nên không thể đảo lựa chọn.
    const delay = [45, 110, 220][attempt] || 220;
    setTimeout(() => runRemoteCommandWithRetry(command, attempt + 1, serial), delay);
    return false;
  }

  function connect(force = false) {
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    const url = remoteWsUrl();
    if (!token || !url) { disconnect(); return; }
    // Socket đang OPEN chưa đủ: phải xác nhận nó thuộc tài khoản hiện hành.
    if (remote.authToken && remote.authToken !== token) disconnect();
    remote.closedByUser = false;
    if (remote.ws && remote.ws.readyState === WebSocket.OPEN && !force) {
      scheduleState(false);
      return;
    }
    if (remote.ws) {
      const old = remote.ws;
      remote.ws = null;
      rtcCloseAll();
      rtcPhoneCount = 0;
      try { old.onopen = old.onclose = old.onerror = old.onmessage = null; old.close(); } catch (_) {}
    }
    clearRetry();
    stopHeartbeat();
    try {
      const ws = new WebSocket(url);
      remote.authToken = token;
      remote.ws = ws;
      ws.onopen = () => {
        remote.retryCount = 0;
        remote.lastSignature = '';
        // Chỉ gửi 1 trạng thái ban đầu để app điện thoại biết máy tính online.
        // Không bật polling DOM cho tới khi điện thoại thực sự hoạt động.
        sendState(true);
        remote.heartbeatTimer = setInterval(() => sendRaw({ type: 'ping', ts: Date.now() }), 60000);
      };
      ws.onmessage = (event) => {
        let msg = null;
        try { msg = JSON.parse(event.data); } catch (_) { return; }
        if (!msg || typeof msg !== 'object' || remote.ws !== ws) return;

        if (msg.type === 'remote_command') {
          // Fallback server cũng dùng command id để tránh thực hiện trùng LAN/server.
          rtcExecuteOnce(String(msg.command || ''), String(msg.id || ''));
          return;
        }
        if (msg.type === 'remote_request_state') {
          // Máy chủ/điện thoại vừa yêu cầu đồng bộ: gửi bản cập nhật PC thật
          // qua WS, kể cả khi WebRTC đang hoạt động. Không đổi đường lệnh.
          sendState(true, true);
          return;
        }
        if (msg.type === 'rtc_phone_count') {
          rtcPhoneCount = Math.max(0, Number(msg.count || 0));
          // Có thêm điện thoại cũ không hỗ trợ LAN: lập tức cập nhật trạng thái fallback.
          sendState(true);
          return;
        }
        if (msg.type === 'rtc_peer_joined') {
          rtcOffer(String(msg.peer_id || ''));
          return;
        }
        if (msg.type === 'rtc_web_deselected') {
          rtcCloseAll();
          return;
        }
        if (msg.type === 'rtc_peer_left') {
          rtcClosePeer(String(msg.peer_id || ''));
          return;
        }
        if (msg.type === 'rtc_answer') { rtcAnswerSignal(msg); return; }
        if (msg.type === 'rtc_ice') { rtcIceSignal(msg); return; }

        // Tương thích nếu server hiện tại / bản server sau này báo presence của điện thoại.
        // Chỉ nhận các tên dành riêng cho PHONE để tránh tự đánh thức bởi presence của PC.
        const type = String(msg.type || '');
        const role = String(msg.role || msg.peerRole || '').toLowerCase();
        const phoneOnline = msg.phoneOnline === true || msg.phone_online === true
          || (role === 'phone' && msg.online !== false);
        if (
          phoneOnline
          || type === 'remote_phone_presence'
          || type === 'phone_presence'
          || type === 'remote_peer_phone'
        ) {
          wakeRemoteForPhone('presence');
        }
      };
      ws.onerror = () => {};
      ws.onclose = () => {
        // Sự kiện close trễ của socket cũ không được đóng/đặt lại socket mới.
        if (remote.ws !== ws) return;
        remote.ws = null;
        remote.authToken = '';
        rtcCloseAll();
        rtcPhoneCount = 0;
        stopHeartbeat();
        scheduleReconnect();
      };
    } catch (_) {
      scheduleReconnect();
    }
  }

  function installMagicWheelRemoteObserver() {
    const modal = document.getElementById('cv7991MagicWheelModal');
    if (!(modal instanceof HTMLElement) || modal.dataset.mvipRemoteObserved === '1') return;
    modal.dataset.mvipRemoteObserved = '1';

    if (typeof MutationObserver === 'function') {
      const observer = new MutationObserver(() => scheduleState(true));
      observer.observe(modal, { attributes:true, attributeFilter:['hidden','class'] });
    }

    // Các nút trên máy tính cũng phải cập nhật điện thoại ngay.
    ['cv7991MagicWheelSpinBtn','cv7991MagicWheelCloseBtn'].forEach((id) => {
      const button = document.getElementById(id);
      if (button instanceof HTMLElement) {
        button.addEventListener('click', () => {
          setTimeout(() => scheduleState(true), 40);
          setTimeout(() => scheduleState(true), 4300);
          setTimeout(() => scheduleState(true), 7200);
        }, true);
      }
    });
    document.addEventListener('mvip-magic-wheel-closed', () => scheduleState(true));
    document.addEventListener('mvip-magic-wheel-watchdog-recovered', () => scheduleState(true));
  }

  installMagicWheelRemoteObserver();

  window.mvipRemoteConnect = connect;
  window.mvipRemoteDisconnect = disconnect;
  window.mvipRemoteSendState = sendState;
  window.mvipRemoteRunCommand = runRemoteCommand;
  window.mvipRemoteTrueFalseCurrent = () => {
    const current = activeQuestionPresenterWithKind();
    if (!(current.presenter instanceof HTMLElement)) return null;
    const row = tfCurrentRow(current.presenter, current.kind);
    return row ? { kind: current.kind, letter: tfRowLetter(row), mark: tfSelectedMark(row) } : null;
  };

  // v13: KHÔNG quét DOM theo chu kỳ khi không dùng điện thoại.
  // Chỉ cập nhật theo sự kiện thật trên máy tính. Khi điện thoại đã hoạt động,
  // bật thêm polling dự phòng 10 giây trong tối đa 10 phút.
  function remoteLocalUiChanged(force = false) {
    if (!remotePhoneIsActive()) remote.idleDirty = true;
    // Khôi phục phiên đã lưu đôi khi hoàn tất trước khi script Remote được tạo.
    // Khi người dùng mở câu hỏi hoặc trang lấy lại focus, bảo đảm WS đã có.
    // Không đóng/mở lại kết nối đang CONNECTING hoặc đã OPEN.
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token) { if (remote.ws) disconnect(); return; }
    if (token !== remote.authToken) connect(true);
    else if (!remote.ws || remote.ws.readyState === WebSocket.CLOSED) connect(false);
    scheduleState(force);
  }

  // Bộ trình chiếu có thể mở SAU khi thao tác click đã được xử lý bất đồng bộ.
  // Bắt đúng sự kiện hiện/ẩn của hai presenter thay vì quét DOM mỗi giây.
  if (typeof MutationObserver === 'function') {
    const visibilityObserver = new MutationObserver(() => remoteLocalUiChanged(true));
    ['singleExamPresenter', 'wordPresentationPresenter'].forEach(id => {
      const presenter = document.getElementById(id);
      if (presenter) visibilityObserver.observe(presenter, {
        attributes: true,
        attributeFilter: ['hidden', 'class', 'style']
      });
    });
  }

  document.addEventListener('click', () => remoteLocalUiChanged(false), true);
  document.addEventListener('fullscreenchange', () => remoteLocalUiChanged(true));
  document.addEventListener('webkitfullscreenchange', () => remoteLocalUiChanged(true));
  document.addEventListener('visibilitychange', () => remoteLocalUiChanged(true));
  window.addEventListener('focus', () => remoteLocalUiChanged(true));
  window.addEventListener('blur', () => remoteLocalUiChanged(true));

  // Watchdog rất nhẹ: chỉ kiểm tra token/socket, KHÔNG gọi currentRemoteState().
  // WebSocket vẫn phải mở để điện thoại có thể đánh thức Remote ngay.
  setInterval(() => {
    const token = String((typeof state !== 'undefined' && state && state.token) || '').trim();
    if (!token) {
      if (remote.ws) disconnect();
      return;
    }
    sleepRemoteIfIdle();
    if (token !== remote.authToken) connect(true);
    else if (!remote.ws || remote.ws.readyState === WebSocket.CLOSED) connect(false);
  }, 60000);

  // Tự nối Remote ngay sau khi script đã sẵn sàng nếu đã khôi phục token.
  // Trước đây sự kiện restoreFromStorage có thể gọi connectRealtime quá sớm,
  // lúc window.mvipRemoteConnect chưa được gán. Không tạo thêm vòng polling.
  if (String((typeof state !== 'undefined' && state && state.token) || '').trim()) {
    setTimeout(() => {
      if (!remote.ws || remote.ws.readyState === WebSocket.CLOSED) connect(false);
    }, 0);
  }
})();
</script>


<!-- Bản điều chỉnh 2026-10-05 v24:
     - Remote không điều khiển bảng trắng.
     - Kết quả quét được đưa vào chính phần tử native fullscreen để giáo viên
       có thể Quét -> KQ quét -> Lưu mà không phải thoát toàn màn hình.
     - Không dùng fullscreen giả khi lệnh Mở rộng đến từ điện thoại. -->
<script id="mvip-remote-fullscreen-result-bridge-20261005-v24">
(() => {
  'use strict';
  const modal = document.getElementById('resultModal');
  if (!(modal instanceof HTMLElement)) return;
  const originalParent = modal.parentNode;
  const originalNext = modal.nextSibling;

  function fsElement() {
    return document.fullscreenElement || document.webkitFullscreenElement || null;
  }

  function isPresentationFullscreen(el) {
    if (!(el instanceof HTMLElement)) return false;
    return el.id === 'wordPresentationPresenter' || el.id === 'singleExamPresenter';
  }

  function restore() {
    if (!originalParent || modal.parentNode === originalParent) return;
    try {
      if (originalNext && originalNext.parentNode === originalParent) originalParent.insertBefore(modal, originalNext);
      else originalParent.appendChild(modal);
    } catch (_) {}
  }

  function sync() {
    const fs = fsElement();
    if (!modal.hidden && isPresentationFullscreen(fs)) {
      if (modal.parentNode !== fs) {
        try { fs.appendChild(modal); } catch (_) {}
      }
      return;
    }
    if (modal.hidden || !isPresentationFullscreen(fs)) restore();
  }

  const observer = new MutationObserver(() => requestAnimationFrame(sync));
  observer.observe(modal, { attributes:true, attributeFilter:['hidden','class'] });
  document.addEventListener('fullscreenchange', () => requestAnimationFrame(sync));
  document.addEventListener('webkitfullscreenchange', () => requestAnimationFrame(sync));
})();
</script>


<!-- Bản điều chỉnh 2026-10-05 v27:
     1) Giữ nguyên câu hỏi ở native fullscreen, không thu nhỏ/chia phần trình chiếu.
     2) Sau thẻ hợp lệ đầu tiên, bảng học sinh phủ lên phần DƯỚI của màn hình,
        chiếm đúng 4/5 chiều cao; 1/5 phía trên dành cho bảng "Kết quả câu hỏi".
     3) Danh sách luôn chia đều 5 cột. Học sinh đã quét vẫn bôi xanh realtime.
     4) Sau khi bấm KQ quét, phương án học sinh chọn hiện ngay sau tên:
        phương án đúng chữ xanh, phương án sai chữ đỏ, giống bảng cũ.
     5) Khi sang câu mới / dữ liệu quét về 0, lớp phủ tự đóng; câu hỏi phía dưới
        vẫn giữ native fullscreen. -->


<!-- Bản điều chỉnh 2026-10-05 v28:
     Giữ nguyên cơ chế v27. Riêng vùng 1/5 phía trên khi bấm KQ quét
     hiển thị ĐẦY ĐỦ bảng Kết quả câu hỏi giống giao diện cũ:
     - Kết quả câu hỏi
     - Đáp án đúng + ô phương án
     - Tỷ lệ đúng
     - Lưu / Hủy (và Xem HD nếu câu có hướng dẫn).
     Bố cục 2 hàng x 2 vùng để chữ to, rõ nhưng không lược bỏ thông tin. -->


<!-- Bản điều chỉnh 2026-10-05 v29:
     Khắc phục chữ thông tin của bảng Kết quả câu hỏi bị trắng trên nền trắng
     khi resultModal được đưa vào presenter fullscreen. Giữ nguyên bố cục v28. -->


<!-- Bản điều chỉnh 2026-10-06 v41:
     - BỎ HẲN cơ chế danh sách học sinh nổi/overlay của v27 và current-board nổi khi đang trình chiếu.
     - Khi có thẻ hợp lệ đầu tiên: vùng trình chiếu thật sự còn 3/5 bên trái; bảng quét riêng chiếm 2/5 bên phải.
     - Áp dụng cho Dùng câu hỏi MVIP, câu hỏi Word, PowerPoint và tài liệu Word/PDF/Excel.
     - Bảng bên phải luôn 2 cột, A/B/C/D ở trên cùng.
     - Kết quả câu hỏi (nếu mở) ghim ở mép trên vùng 3/5 bên trái. -->
<style id="mvip-live-scan-structural-split-style-20261006-v41">
  body.mvip-live-scan-structural-split {
    /* Mặc định cho lớp > 60 HS: 4 cột, 60% trình chiếu + 40% danh sách.
       JavaScript sẽ tự đổi sang 3 cột, 70% + 30% khi lớp có <= 60 HS. */
    --mvip-live-left:60vw;
    --mvip-live-right:40vw;
    --mvip-live-columns:4;
    overflow:hidden !important;
  }

  /* Quan trọng: ẩn hẳn bảng realtime cũ để nó không thể nổi đè lên câu hỏi. */
  body.mvip-live-scan-structural-split #bang-dieu-khien .current-board,
  body.mvip-live-scan-structural-split #mvipRemoteStudentOverlay {
    display:none !important;
    visibility:hidden !important;
    pointer-events:none !important;
  }

  /* Presenter lấy lại toàn bộ chiều ngang cửa sổ, rồi DÀNH THẬT 40vw bên phải
     bằng padding. Vì vậy nội dung bên trái không còn nằm phía sau bảng học sinh. */
  body.mvip-live-scan-structural-split #wordPresentationPresenter,
  body.mvip-live-scan-structural-split #singleExamPresenter {
    left:0 !important;
    right:0 !important;
    width:100vw !important;
    max-width:none !important;
    box-sizing:border-box !important;
    padding-right:var(--mvip-live-right) !important;
    overflow:hidden !important;
  }

  body.mvip-live-scan-structural-split #wordPresentationPresenter > .word-presentation-toolbar,
  body.mvip-live-scan-structural-split #wordPresentationPresenter > #powerPointPresentationControls,
  body.mvip-live-scan-structural-split #wordPresentationPresenter > #wordPresentationAccessBanner,
  body.mvip-live-scan-structural-split #wordPresentationPresenter > #wordPresentationViewport,
  body.mvip-live-scan-structural-split #singleExamPresenter > .single-exam-toolbar,
  body.mvip-live-scan-structural-split #singleExamPresenter > #singleExamAccessBanner,
  body.mvip-live-scan-structural-split #singleExamPresenter > #singleExamBody,
  body.mvip-live-scan-structural-split #singleExamPresenter > #singleExamAdStrip {
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
    box-sizing:border-box !important;
    align-self:stretch !important;
  }

  body.mvip-live-scan-structural-split #wordPresentationPresenter > #wordPresentationViewport,
  body.mvip-live-scan-structural-split #singleExamPresenter > #singleExamBody {
    flex:1 1 auto !important;
    min-height:0 !important;
    margin:0 !important;
    border-right:2px solid #64748b !important;
    overflow:auto !important;
  }
  body.mvip-live-scan-structural-split #singleExamPresenter #singleExamSlide {
    width:100% !important;
    max-width:100% !important;
    min-width:0 !important;
  }

  /* Vô hiệu hóa các kích thước 3/4–1/4 / panel-w cũ nếu class cũ còn tồn tại. */
  body.mvip-live-scan-structural-split.word-presentation-scan-split #wordPresentationPresenter,
  body.mvip-live-scan-structural-split.mvip-powerpoint-scan-split #wordPresentationPresenter,
  body.mvip-live-scan-structural-split.desktop-fixed-right #singleExamPresenter {
    left:0 !important;
    right:0 !important;
    width:100vw !important;
    max-width:none !important;
    padding-right:var(--mvip-live-right) !important;
  }
  body.mvip-live-scan-structural-split.word-presentation-scan-split #wordPresentationPresenter > #wordPresentationViewport,
  body.mvip-live-scan-structural-split.mvip-powerpoint-scan-split #wordPresentationPresenter > #wordPresentationViewport {
    width:100% !important;
    max-width:100% !important;
    height:auto !important;
    flex:1 1 auto !important;
    margin:0 !important;
  }

  /* Bảng quét MỚI nằm đúng trong 40vw đã được dành riêng, không phủ lên phần trình chiếu. */
  #mvipLiveScanSidePanel {
    position:absolute !important;
    right:0 !important;
    top:0 !important;
    bottom:0 !important;
    width:var(--mvip-live-right,40vw) !important;
    height:100% !important;
    min-width:0 !important;
    min-height:0 !important;
    box-sizing:border-box !important;
    z-index:9460 !important;
    display:flex !important;
    flex-direction:column !important;
    gap:6px !important;
    padding:7px !important;
    overflow:hidden !important;
    background:#f8fafc !important;
    color:#0f172a !important;
    border-left:2px solid #64748b !important;
  }
  #mvipLiveScanSidePanel[hidden] { display:none !important; }

  #mvipLiveScanSidePanel .mvip-live-answer-bar {
    flex:0 0 auto !important;
    display:grid !important;
    grid-template-columns:repeat(4,minmax(0,1fr)) !important;
    gap:6px !important;
    width:100% !important;
    min-height:58px !important;
  }
  #mvipLiveScanSidePanel .mvip-live-answer-btn {
    min-width:0 !important;
    height:58px !important;
    padding:0 !important;
    border:2px solid #4338ca !important;
    border-radius:9px !important;
    background:#4f46e5 !important;
    color:#fff !important;
    font:900 clamp(25px,2.5vw,40px)/1 Arial,Helvetica,sans-serif !important;
    cursor:pointer !important;
    box-shadow:0 2px 5px rgba(15,23,42,.16) !important;
  }
  #mvipLiveScanSidePanel .mvip-live-answer-btn:hover:not(:disabled),
  #mvipLiveScanSidePanel .mvip-live-answer-btn:focus-visible {
    background:#4338ca !important;
    outline:3px solid rgba(59,130,246,.30) !important;
    outline-offset:1px !important;
  }
  #mvipLiveScanSidePanel .mvip-live-answer-btn.is-selected {
    background:#16a34a !important;
    border-color:#15803d !important;
  }
  #mvipLiveScanSidePanel .mvip-live-answer-btn:disabled {
    opacity:.42 !important;
    cursor:not-allowed !important;
  }

  #mvipLiveScanSidePanel .mvip-live-student-grid {
    flex:1 1 auto !important;
    min-width:0 !important;
    min-height:0 !important;
    width:100% !important;
    display:grid !important;
    grid-template-columns:repeat(var(--mvip-live-columns,4),minmax(0,1fr)) !important;
    gap:3px !important;
    overflow:hidden !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-col {
    min-width:0 !important;
    min-height:0 !important;
    display:grid !important;
    gap:1px !important;
    overflow:hidden !important;
    border:1px solid #94a3b8 !important;
    background:#fff !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-row {
    min-width:0 !important;
    min-height:0 !important;
    display:flex !important;
    align-items:center !important;
    justify-content:space-between !important;
    gap:4px !important;
    padding:2px 4px !important;
    box-sizing:border-box !important;
    border-bottom:1px solid #cbd5e1 !important;
    background:#fff !important;
    color:#0f172a !important;
    font:700 var(--mvip-live-roster-font,clamp(15px,1.5vw,24px))/1.05 Arial,Helvetica,sans-serif !important;
    white-space:nowrap !important;
    overflow:hidden !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-row:last-child { border-bottom:0 !important; }
  #mvipLiveScanSidePanel .mvip-live-student-row.is-scanned {
    background:#86efac !important;
    box-shadow:inset 0 0 0 1px #22c55e !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-row.is-dropped { opacity:.46 !important; }
  #mvipLiveScanSidePanel .mvip-live-student-name {
    flex:1 1 auto !important;
    min-width:0 !important;
    overflow:hidden !important;
    text-overflow:ellipsis !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-answer {
    flex:0 0 auto !important;
    margin-left:.2em !important;
    font-weight:900 !important;
  }
  #mvipLiveScanSidePanel .mvip-live-student-answer.is-correct { color:#15803d !important; }
  #mvipLiveScanSidePanel .mvip-live-student-answer.is-wrong { color:#dc2626 !important; }
  #mvipLiveScanSidePanel .mvip-live-empty {
    grid-column:1/-1 !important;
    display:flex !important;
    align-items:center !important;
    justify-content:center !important;
    color:#475569 !important;
    font:800 clamp(18px,2vw,28px)/1.2 Arial,Helvetica,sans-serif !important;
  }

  /* Kết quả câu hỏi nằm ở TRÊN CÙNG của vùng 3/5, không còn ở giữa màn hình. */
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
    position:fixed !important;
    left:0 !important;
    right:auto !important;
    top:var(--mvip-live-presenter-top,0px) !important;
    bottom:auto !important;
    width:var(--mvip-live-left,60vw) !important;
    height:clamp(132px,19vh,178px) !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:0 !important;
    z-index:9580 !important;
    pointer-events:none !important;
    background:transparent !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-modal-backdrop {
    display:none !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
    pointer-events:auto !important;
    position:absolute !important;
    left:8px !important;
    right:8px !important;
    top:6px !important;
    bottom:auto !important;
    width:auto !important;
    height:calc(100% - 12px) !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    margin:0 !important;
    padding:10px 16px !important;
    transform:none !important;
    box-sizing:border-box !important;
    display:grid !important;
    grid-template-columns:auto auto minmax(0,1fr) !important;
    grid-template-rows:minmax(0,1fr) auto !important;
    grid-template-areas:"title answer rate" "actions actions actions" !important;
    gap:5px 14px !important;
    align-items:center !important;
    overflow:hidden !important;
    border:2px solid #22c55e !important;
    border-radius:13px !important;
    background:#fff !important;
    color:#0f172a !important;
    box-shadow:0 7px 20px rgba(15,23,42,.20) !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-title {
    grid-area:title !important; margin:0 !important; color:#0f172a !important;
    font-size:clamp(21px,2.2vw,33px) !important; line-height:1 !important; font-weight:900 !important; white-space:nowrap !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row {
    grid-area:answer !important; margin:0 !important; display:flex !important; align-items:center !important; gap:7px !important;
    color:#0f172a !important; font-size:clamp(17px,1.65vw,27px) !important; line-height:1 !important; font-weight:800 !important; white-space:nowrap !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
    grid-area:rate !important; margin:0 !important; justify-self:end !important;
    color:#0f172a !important; font-size:clamp(16px,1.5vw,25px) !important; line-height:1 !important; font-weight:800 !important; white-space:nowrap !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions {
    grid-area:actions !important; margin:0 !important; display:flex !important; align-items:center !important; justify-content:flex-start !important; gap:8px !important; flex-wrap:nowrap !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    min-height:34px !important; padding:5px 13px !important; border-radius:8px !important; font-size:clamp(14px,1.25vw,20px) !important; line-height:1 !important;
  }
</style>
<script id="mvip-live-scan-structural-split-script-20261006-v41">
(() => {
  'use strict';

  let panel = null;
  let dismissedForCurrentSet = false;
  let lastLiveCount = 0;
  let raf = 0;
  let activeHost = null;

  function isVisible(el) {
    if (!(el instanceof HTMLElement) || el.hidden) return false;
    const s = getComputedStyle(el);
    return s.display !== 'none' && s.visibility !== 'hidden';
  }

  function activePresenter() {
    const single = document.getElementById('singleExamPresenter');
    if (isVisible(single)) return single;
    const word = document.getElementById('wordPresentationPresenter');
    if (isVisible(word)) return word;
    return null;
  }

  function liveCount() {
    try {
      if (typeof state !== 'undefined' && state && state.currentLiveAnswers && typeof state.currentLiveAnswers === 'object') {
        return Object.values(state.currentLiveAnswers).filter((row) => {
          const ans = String(row && row.ans || '').trim().toUpperCase();
          return ['A','B','C','D'].includes(ans);
        }).length;
      }
    } catch (_) {}
    const live = document.getElementById('liveCount');
    const n = parseInt(String(live && live.textContent || '0').replace(/\D+/g,''),10);
    return Number.isFinite(n) ? n : 0;
  }

  function studentRows() {
    const root = document.getElementById('studentColumns');
    if (!(root instanceof HTMLElement)) return [];
    const rows = Array.from(root.querySelectorAll('[data-scan-student]'));
    rows.sort((a,b) => {
      const aa = String(a.getAttribute('data-scan-student') || '');
      const bb = String(b.getAttribute('data-scan-student') || '');
      const an = /^\d+$/.test(aa) ? parseInt(aa,10) : Number.MAX_SAFE_INTEGER;
      const bn = /^\d+$/.test(bb) ? parseInt(bb,10) : Number.MAX_SAFE_INTEGER;
      return an !== bn ? an-bn : aa.localeCompare(bb,'vi');
    });
    return rows;
  }

  function rowText(row) {
    const named = row.querySelector('.student-name');
    if (named) return String(named.textContent || '').trim();
    const id = String(row.querySelector('.student-cell-id')?.textContent || row.getAttribute('data-scan-student') || '').trim();
    const name = String(row.querySelector('.student-cell-name')?.textContent || '').trim();
    return `${id}${name}`.trim() || String(row.textContent || '').trim();
  }

  function rowAnswer(row) {
    const suffix = row.querySelector('.student-answer-suffix');
    if (!(suffix instanceof HTMLElement)) return null;
    const value = String(suffix.textContent || '').trim();
    if (!value) return null;
    return { value, correct:suffix.classList.contains('correct'), wrong:suffix.classList.contains('wrong') };
  }

  function ensurePanel(host) {
    if (!(panel instanceof HTMLElement)) {
      panel = document.createElement('aside');
      panel.id = 'mvipLiveScanSidePanel';
      panel.hidden = true;
      panel.setAttribute('aria-label','Danh sách học sinh đang quét');
    }
    if (panel.parentNode !== host) {
      try { host.appendChild(panel); } catch (_) {}
    }
    return panel;
  }

  function rosterFont(rowsPerCol) {
    // Giá trị khởi tạo. Sau khi bảng được gắn vào DOM, fitRosterFont() sẽ
    // đo đúng chiều rộng/cao thực tế và nâng chữ tới mức lớn nhất có thể.
    if (rowsPerCol <= 10) return '22px';
    if (rowsPerCol <= 14) return '19px';
    if (rowsPerCol <= 18) return '17px';
    return '15px';
  }

  function fitRosterFont(el, rows, columns, perCol) {
    if (!(el instanceof HTMLElement)) return;
    const grid = el.querySelector('.mvip-live-student-grid');
    if (!(grid instanceof HTMLElement) || !rows.length) return;
    const cs = getComputedStyle(grid);
    const columnGap = Number.parseFloat(cs.columnGap || cs.gap || '0') || 0;
    const rowGap = 1;
    const gridWidth = Math.max(1, grid.clientWidth);
    const gridHeight = Math.max(1, grid.clientHeight);
    const colWidth = Math.max(1, (gridWidth - columnGap * Math.max(0, columns - 1)) / columns);
    const rowHeight = Math.max(1, (gridHeight - rowGap * Math.max(0, perCol - 1)) / perCol);

    // Trừ padding + viền và chừa một ít chỗ cho ký tự đáp án nếu có.
    const availableWidth = Math.max(24, colWidth - 12);
    const availableHeight = Math.max(10, rowHeight - 4);
    const samples = rows.map((src) => {
      const info = rowAnswer(src);
      return `${rowText(src)}${info && info.value ? ` ${info.value}` : ''}`.trim();
    }).filter(Boolean);
    if (!samples.length) return;

    const canvas = fitRosterFont.canvas || (fitRosterFont.canvas = document.createElement('canvas'));
    const ctx = canvas.getContext('2d');
    if (!ctx) return;

    // Giới hạn trên đủ lớn để màn hình độ phân giải cao vẫn tận dụng được không gian.
    let low = 10;
    let high = Math.max(low, Math.min(36, Math.floor(availableHeight / 1.05)));
    let best = low;
    while (low <= high) {
      const mid = Math.floor((low + high) / 2);
      ctx.font = `700 ${mid}px Arial`;
      let widest = 0;
      for (const value of samples) widest = Math.max(widest, ctx.measureText(value).width);
      if (widest <= availableWidth) {
        best = mid;
        low = mid + 1;
      } else {
        high = mid - 1;
      }
    }
    el.style.setProperty('--mvip-live-roster-font', `${best}px`);
  }

  function updatePresenterTop(host) {
    try {
      const rect = host.getBoundingClientRect();
      document.body.style.setProperty('--mvip-live-presenter-top', `${Math.max(0,Math.round(rect.top))}px`);
    } catch (_) {
      document.body.style.setProperty('--mvip-live-presenter-top','0px');
    }
  }

  function clearLegacyFloatingUi() {
    const old = document.getElementById('mvipRemoteStudentOverlay');
    if (old instanceof HTMLElement) old.hidden = true;
    document.body.classList.remove('mvip-remote-scan-overlay-open','mvip-powerpoint-scan-split','mvip-universal-scan-split');
  }

  function render(force=false) {
    const host = activePresenter();
    const count = liveCount();
    clearLegacyFloatingUi();

    if (!(host instanceof HTMLElement) || count <= 0) {
      if (count <= 0) {
        dismissedForCurrentSet = false;
        lastLiveCount = 0;
      }
      hide(false);
      return false;
    }
    if (lastLiveCount <= 0 && count > 0) dismissedForCurrentSet = false;
    lastLiveCount = count;
    if (dismissedForCurrentSet && !force) return false;

    const activationChanged = activeHost !== host || !document.body.classList.contains('mvip-live-scan-structural-split');
    const el = ensurePanel(host);
    const rows = studentRows();

    /* Bố cục danh sách học sinh tự thích ứng theo sĩ số:
       - <= 60 HS: 3 cột, dành 30vw cho danh sách và 70vw cho trình chiếu.
       - > 60 HS: 4 cột, giữ 40vw danh sách và 60vw trình chiếu như trước. */
    const columns = rows.length <= 60 ? 3 : 4;
    const rightVw = columns === 3 ? 30 : 40;
    const leftVw = 100 - rightVw;
    document.body.style.setProperty('--mvip-live-columns', String(columns));
    document.body.style.setProperty('--mvip-live-right', `${rightVw}vw`);
    document.body.style.setProperty('--mvip-live-left', `${leftVw}vw`);

    const perCol = Math.max(1,Math.ceil(Math.max(1,rows.length)/columns));
    el.style.setProperty('--mvip-live-roster-font',rosterFont(perCol));

    const frag = document.createDocumentFragment();
    const answerBar = document.createElement('div');
    answerBar.className = 'mvip-live-answer-bar';
    answerBar.setAttribute('aria-label','Chọn đáp án đúng');
    ['A','B','C','D'].forEach((letter) => {
      const original = document.getElementById('correctBtn'+letter);
      const btn = document.createElement('button');
      btn.type = 'button';
      btn.className = 'mvip-live-answer-btn';
      btn.textContent = letter;
      btn.dataset.answer = letter;
      btn.disabled = original instanceof HTMLButtonElement ? original.disabled : count <= 0;
      try {
        if (typeof state !== 'undefined' && state && state.revealAnswers
          && String(state.selectedCorrect || '').toUpperCase() === letter) btn.classList.add('is-selected');
      } catch (_) {}
      btn.addEventListener('click', () => {
        const source = document.getElementById('correctBtn'+letter);
        if (!(source instanceof HTMLButtonElement) || source.disabled) return;
        try { source.click(); } catch (_) { return; }
        setTimeout(schedule,20);
        setTimeout(() => {
          try { if (typeof window.mvipRemoteSendState === 'function') window.mvipRemoteSendState(true); } catch (_) {}
        },40);
      });
      answerBar.appendChild(btn);
    });
    frag.appendChild(answerBar);

    const grid = document.createElement('div');
    grid.className = 'mvip-live-student-grid';
    if (!rows.length) {
      const empty = document.createElement('div');
      empty.className = 'mvip-live-empty';
      empty.textContent = 'Chưa có danh sách học sinh';
      grid.appendChild(empty);
    } else {
      for (let c=0;c<columns;c+=1) {
        const col = document.createElement('div');
        col.className = 'mvip-live-student-col';
        const slice = rows.slice(c*perCol,Math.min(rows.length,(c+1)*perCol));
        col.style.gridTemplateRows = `repeat(${Math.max(1,slice.length)},minmax(0,1fr))`;
        slice.forEach((src) => {
          const row = document.createElement('div');
          row.className = 'mvip-live-student-row';
          if (src.classList.contains('scanned') || src.classList.contains('correct')) row.classList.add('is-scanned');
          if (src.classList.contains('dropped')) row.classList.add('is-dropped');
          row.setAttribute('data-scan-student',String(src.getAttribute('data-scan-student') || ''));

          const name = document.createElement('span');
          name.className = 'mvip-live-student-name';
          name.textContent = rowText(src);
          row.appendChild(name);

          const info = rowAnswer(src);
          if (info) {
            const ans = document.createElement('span');
            ans.className = 'mvip-live-student-answer';
            if (info.correct) ans.classList.add('is-correct');
            if (info.wrong) ans.classList.add('is-wrong');
            ans.textContent = info.value;
            row.appendChild(ans);
          }
          col.appendChild(row);
        });
        grid.appendChild(col);
      }
    }
    frag.appendChild(grid);
    el.replaceChildren(frag);
    el.hidden = false;
    document.body.classList.add('mvip-live-scan-structural-split');
    updatePresenterTop(host);
    activeHost = host;
    fitRosterFont(el, rows, columns, perCol);
    requestAnimationFrame(() => {
      if (panel === el && !el.hidden) fitRosterFont(el, rows, columns, perCol);
    });

    /* Chỉ phát resize khi vừa chuyển sang bố cục 3/5–2/5 hoặc đổi presenter,
       tránh vòng lặp render bảng học sinh -> resize -> render bảng học sinh. */
    if (activationChanged) {
      try { window.dispatchEvent(new Event('resize')); } catch (_) {}
      try { if (typeof wpFitOrdinaryPage === 'function') wpFitOrdinaryPage(); } catch (_) {}
    }
    return true;
  }

  function hide(manual=true) {
    if (manual && liveCount() > 0) dismissedForCurrentSet = true;
    if (panel instanceof HTMLElement) panel.hidden = true;
    const wasActive = document.body.classList.contains('mvip-live-scan-structural-split');
    document.body.classList.remove('mvip-live-scan-structural-split');
    document.body.style.removeProperty('--mvip-live-presenter-top');
    document.body.style.removeProperty('--mvip-live-columns');
    document.body.style.removeProperty('--mvip-live-right');
    document.body.style.removeProperty('--mvip-live-left');
    activeHost = null;
    clearLegacyFloatingUi();
    if (wasActive) {
      try { window.dispatchEvent(new Event('resize')); } catch (_) {}
    }
    return true;
  }

  function visiblePanel() {
    return panel instanceof HTMLElement && !panel.hidden && isVisible(panel);
  }

  function schedule() {
    cancelAnimationFrame(raf);
    raf = requestAnimationFrame(() => { raf=0; render(false); });
  }

  /* Giữ tên API cũ để phần quét hiện tại gọi vào, nhưng bên trong KHÔNG còn overlay. */
  window.mvipRemoteMaybeShowScanOverlay = () => render(false);
  window.mvipRemoteShowScanRoster = () => render(true);
  window.mvipRemoteHideScanRoster = () => hide(true);
  window.mvipRemoteScanRosterVisible = () => visiblePanel();
  window.mvipRemoteScanViewRequested = () => liveCount() > 0 && !dismissedForCurrentSet;

  const studentRoot = document.getElementById('studentColumns');
  const live = document.getElementById('liveCount');
  const result = document.getElementById('resultModal');
  const word = document.getElementById('wordPresentationPresenter');
  const single = document.getElementById('singleExamPresenter');
  if (typeof MutationObserver === 'function') {
    const observer = new MutationObserver(schedule);
    if (studentRoot) observer.observe(studentRoot,{childList:true,subtree:true,characterData:true,attributes:true,attributeFilter:['class']});
    if (live) observer.observe(live,{childList:true,subtree:true,characterData:true});
    if (result) observer.observe(result,{attributes:true,attributeFilter:['hidden','class']});
    if (word) observer.observe(word,{attributes:true,attributeFilter:['hidden','class']});
    if (single) observer.observe(single,{attributes:true,attributeFilter:['hidden','class']});
  }
  document.addEventListener('fullscreenchange',schedule);
  document.addEventListener('webkitfullscreenchange',schedule);
  window.addEventListener('resize',() => {
    const host=activePresenter();
    if (host) updatePresenterTop(host);
  });
  document.addEventListener('click',() => setTimeout(schedule,0),true);

  clearLegacyFloatingUi();
  schedule();
})();
</script>


<!-- Bản thử nghiệm v44 - chỉnh 2026-10-06:
     1) Remote PowerPoint trên điện thoại bỏ nút Tự động.
     2) Nút KQ quét đổi thành "Kết quả quét", chỉ hiện sau khi nhận thẻ hợp lệ.
     3) Áp dụng đồng nhất cho Dùng câu hỏi của MVIP và Trình chiếu câu hỏi Word thành câu hỏi tương tác.
     4) Nút nằm giữa ngay dưới thanh công cụ của vùng trình chiếu. -->
<style id="mvip-v44-scan-result-dock-style-20261006">
  .mvip-v44-scan-result-dock {
    position:absolute !important;
    z-index:9750 !important;
    display:flex !important;
    justify-content:center !important;
    align-items:flex-start !important;
    pointer-events:none !important;
    height:34px !important;
    box-sizing:border-box !important;
  }
  .mvip-v44-scan-result-dock[hidden] { display:none !important; }
  .mvip-v44-scan-result-dock > button {
    pointer-events:auto !important;
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    min-width:154px !important;
    height:30px !important;
    min-height:30px !important;
    padding:0 20px !important;
    margin:0 !important;
    border-radius:6px !important;
    border:2px solid #7c3aed !important;
    background:#7c3aed !important;
    color:#fff !important;
    font-size:15px !important;
    line-height:1 !important;
    font-weight:900 !important;
    box-shadow:0 4px 10px rgba(124,58,237,.18) !important;
    opacity:1 !important;
    visibility:visible !important;
  }
  .mvip-v44-scan-result-dock > button[hidden] { display:none !important; }
  .mvip-v44-scan-result-dock > button:hover:not(:disabled) {
    background:#6d28d9 !important;
    border-color:#6d28d9 !important;
  }
</style>
<script id="mvip-v44-scan-result-dock-script-20261006">
(() => {
  'use strict';

  function setupScanResultDock({ presenterId, toolbarSelector, buttonId, dockId, isWord = false }) {
    const presenter = document.getElementById(presenterId);
    const toolbar = presenter && presenter.querySelector(toolbarSelector);
    const button = document.getElementById(buttonId);
    if (!(presenter instanceof HTMLElement) || !(toolbar instanceof HTMLElement) || !(button instanceof HTMLButtonElement)) return;

    let dock = document.getElementById(dockId);
    if (!(dock instanceof HTMLElement)) {
      dock = document.createElement('div');
      dock.id = dockId;
      dock.className = 'mvip-v44-scan-result-dock';
      dock.hidden = true;
      toolbar.insertAdjacentElement('afterend', dock);
    }
    if (button.parentElement !== dock) dock.appendChild(button);

    const sync = () => {
      // Trình chiếu Word thông thường / PowerPoint không dùng nút kết quả câu hỏi Word tương tác.
      const wrongWordMode = isWord && (
        presenter.classList.contains('is-ordinary-document') ||
        presenter.classList.contains('is-powerpoint-slide-mode')
      );

      // Cả hai presenter chỉ hiện nút sau khi thực sự có dữ liệu quét đủ điều kiện xem.
      // Nhánh MVIP dùng hidden+disabled; nhánh Word dùng disabled để phản ánh canView.
      const canShow = !presenter.hidden && !wrongWordMode && !button.hidden && !button.disabled;
      if (!canShow) {
        dock.hidden = true;
        return;
      }

      if (button.textContent !== 'Kết quả quét') button.textContent = 'Kết quả quét';
      const p = presenter.getBoundingClientRect();
      const t = toolbar.getBoundingClientRect();
      if (!(p.width > 0) || !(t.width > 0)) {
        dock.hidden = true;
        return;
      }

      dock.hidden = false;
      dock.style.left = `${Math.max(0, t.left - p.left)}px`;
      dock.style.top = `${Math.max(0, t.bottom - p.top + 2)}px`;
      dock.style.width = `${Math.max(1, t.width)}px`;
    };

    let queued = false;
    const schedule = () => {
      if (queued) return;
      queued = true;
      requestAnimationFrame(() => {
        queued = false;
        sync();
      });
    };

    const observer = new MutationObserver(schedule);
    observer.observe(button, {
      attributes:true,
      attributeFilter:['hidden','disabled','class'],
      childList:true,
      subtree:true,
      characterData:true
    });
    observer.observe(presenter, {attributes:true, attributeFilter:['hidden','class','style']});
    observer.observe(toolbar, {attributes:true, attributeFilter:['class','style']});
    window.addEventListener('resize', schedule, {passive:true});
    document.addEventListener('fullscreenchange', schedule);
    document.addEventListener('webkitfullscreenchange', schedule);
    document.addEventListener('click', () => setTimeout(schedule, 0), true);
    schedule();
  }

  setupScanResultDock({
    presenterId:'singleExamPresenter',
    toolbarSelector:':scope > .single-exam-toolbar',
    buttonId:'singleExamViewBtn',
    dockId:'mvipSingleScanResultDock'
  });

  setupScanResultDock({
    presenterId:'wordPresentationPresenter',
    toolbarSelector:':scope > .word-presentation-toolbar',
    buttonId:'wordPresentationResultBtn',
    dockId:'mvipWordScanResultDock',
    isWord:true
  });
})();
</script>

<!-- Bản thử nghiệm v44: bỏ nút Chọn lại khỏi mọi bảng Kết quả câu hỏi và khỏi điều khiển điện thoại. -->
<style id="mvip-v44-no-result-repick">
  #resultRepickBtn { display:none !important; visibility:hidden !important; }
</style>


<!-- MVIP v44 - bổ sung 2026-10-07: trong bố cục quét 3/5 + 2/5,
     hiện nút X ngay bên phải hai nút điều hướng: Kết quả quét, ←, →, X. -->
<style id="mvip-v44-scan-toolbar-close-button-20261007">
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > #wordPresentationCloseBtn,
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > #singleExamCloseBtn {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    flex:0 0 42px !important;
    width:42px !important;
    min-width:42px !important;
    height:30px !important;
    min-height:30px !important;
    margin:0 !important;
    padding:0 !important;
    order:40 !important;
  }
</style>

<!-- MVIP 2026-10-07 FINAL OVERRIDE v4: bảng kết quả cao gấp đôi, chữ/nút gấp đôi -->
<style id="mvip-result-double-size-final-override-v4">
  #resultModal:not([hidden]) .result-dialog,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog {
    display:flex !important;
    flex-direction:row !important;
    flex-wrap:nowrap !important;
    align-items:center !important;
    min-height:100px !important;
    height:100px !important;
    max-height:100px !important;
    padding:10px 16px !important;
    gap:14px !important;
    overflow:hidden !important;
  }

  #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-row,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-row,
  #resultModal:not([hidden]) .result-rate-line,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line,
  body.single-exam-presenting #resultModal:not([hidden]) .result-rate-line,
  #resultModal.is-word-question-result:not([hidden]) .result-rate-line {
    display:flex !important;
    align-items:center !important;
    flex:0 1 auto !important;
    margin:0 !important;
    padding:10px 16px !important;
    border:2px solid #3b82f6 !important;
    border-radius:12px !important;
    font-size:clamp(28px,2.6vw,40px) !important;
    font-weight:800 !important;
    line-height:1 !important;
    white-space:nowrap !important;
  }

  #resultModal:not([hidden]) .result-correct-badge,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge,
  body.single-exam-presenting #resultModal:not([hidden]) .result-correct-badge,
  #resultModal.is-word-question-result:not([hidden]) .result-correct-badge {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    height:56px !important;
    min-width:60px !important;
    padding:0 14px !important;
    margin:0 !important;
    border-radius:10px !important;
    font-size:inherit !important;
    font-weight:900 !important;
    line-height:1 !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions {
    display:flex !important;
    flex:0 0 auto !important;
    flex-wrap:nowrap !important;
    align-items:center !important;
    gap:12px !important;
    margin:0 0 0 auto !important;
    padding:0 !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions .nav-btn {
    height:62px !important;
    min-height:62px !important;
    padding:8px 20px !important;
    margin:0 !important;
    border-radius:10px !important;
    font-size:clamp(26px,2.2vw,36px) !important;
    font-weight:800 !important;
    line-height:1 !important;
  }

  body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
    height:116px !important;
    min-height:116px !important;
    max-height:116px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
    top:8px !important;
    bottom:auto !important;
    left:8px !important;
    right:8px !important;
    width:auto !important;
    min-height:100px !important;
    height:100px !important;
    max-height:100px !important;
    padding:10px 14px !important;
    gap:12px !important;
    transform:none !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
    padding:10px 14px !important;
    font-size:clamp(28px,2.6vw,40px) !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge {
    height:56px !important;
    min-width:60px !important;
    padding:0 14px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    height:62px !important;
    min-height:62px !important;
    padding:8px 20px !important;
    font-size:clamp(26px,2.2vw,36px) !important;
  }
</style>

<!-- MVIP 2026-10-10: Fix bảng Kết quả câu hỏi ở TRANG CHỦ khi quét thẻ và có bảng học sinh bên phải.
     Giữ nguyên bố cục kết quả trong các chế độ trình chiếu/fullscreen. -->
<style id="mvip-home-scan-result-modal-layout-fix-20261010">
  /* Chỉ áp dụng trang chủ đang có panel quét thẻ bên phải; tuyệt đối không can thiệp presenter. */
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) {
    position:fixed !important;
    inset:0 var(--panel-w, 34vw) 0 0 !important;
    width:auto !important;
    height:100dvh !important;
    min-width:0 !important;
    min-height:0 !important;
    max-width:none !important;
    max-height:none !important;
    display:flex !important;
    align-items:center !important;
    justify-content:center !important;
    padding:0 !important;
    margin:0 !important;
    z-index:5000 !important;
    background:transparent !important;
    pointer-events:none !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-modal-backdrop {
    display:block !important;
    position:absolute !important;
    inset:0 !important;
    background:rgba(15, 23, 42, .13) !important;
    pointer-events:auto !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog {
    position:relative !important;
    left:auto !important;
    right:auto !important;
    top:auto !important;
    bottom:auto !important;
    transform:none !important;
    width:calc(100% - 28px) !important;
    max-width:960px !important;
    min-width:0 !important;
    height:auto !important;
    min-height:0 !important;
    max-height:calc(100dvh - 24px) !important;
    margin:0 !important;
    padding:16px 18px !important;
    box-sizing:border-box !important;
    display:grid !important;
    grid-template-columns:minmax(0, 1fr) minmax(0, 1.1fr) !important;
    grid-template-rows:auto auto !important;
    grid-template-areas:"answer rate" "actions actions" !important;
    gap:12px !important;
    align-items:center !important;
    justify-content:stretch !important;
    overflow:auto !important;
    border:2px solid #22c55e !important;
    border-radius:16px !important;
    background:#fff !important;
    box-shadow:0 16px 42px rgba(15,23,42,.22) !important;
    pointer-events:auto !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-title {
    display:none !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-row,
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-rate-line {
    min-width:0 !important;
    max-width:100% !important;
    width:100% !important;
    margin:0 !important;
    padding:10px 12px !important;
    box-sizing:border-box !important;
    display:flex !important;
    align-items:center !important;
    justify-content:center !important;
    gap:8px !important;
    border:2px solid #3b82f6 !important;
    border-radius:11px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:clamp(20px,2vw,30px) !important;
    line-height:1.15 !important;
    font-weight:800 !important;
    white-space:normal !important;
    overflow-wrap:anywhere !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-row {
    grid-area:answer !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-rate-line {
    grid-area:rate !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-correct-badge {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    min-width:44px !important;
    width:auto !important;
    height:44px !important;
    padding:0 10px !important;
    margin:0 !important;
    font-size:inherit !important;
    font-weight:900 !important;
    border-radius:9px !important;
    background:#bfdbfe !important;
    color:#15803d !important;
    flex:0 0 auto !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-actions {
    grid-area:actions !important;
    display:flex !important;
    justify-content:center !important;
    align-items:center !important;
    flex-wrap:wrap !important;
    gap:12px !important;
    min-width:0 !important;
    margin:0 !important;
    padding:0 !important;
    white-space:normal !important;
  }
  body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-actions .nav-btn:not([hidden]) {
    display:inline-flex !important;
    justify-content:center !important;
    align-items:center !important;
    flex:0 0 auto !important;
    height:52px !important;
    min-height:52px !important;
    padding:8px 25px !important;
    border-radius:10px !important;
    font-size:25px !important;
    line-height:1.1 !important;
    font-weight:800 !important;
  }
  /* Tôn trọng các nút ẩn của giao diện v44. */
  body.desktop-fixed-right #resultModal:not([hidden]) #resultRepickBtn,
  body.desktop-fixed-right #resultModal:not([hidden]) #singleExamGuideBtn {
    display:none !important;
  }
  @media (max-width:1100px) {
    body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog {
      grid-template-columns:minmax(0,1fr) !important;
      grid-template-rows:auto auto auto !important;
      grid-template-areas:"answer" "rate" "actions" !important;
      max-width:620px !important;
    }
  }
  @media (max-width:600px) {
    body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog {
      padding:10px !important;
      gap:8px !important;
    }
    body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-row,
    body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-rate-line {
      font-size:18px !important;
      padding:7px !important;
    }
    body.desktop-fixed-right:not(.single-exam-presenting):not(.word-presentation-open):not(.mvip-live-scan-structural-split) #resultModal:not([hidden]) .result-dialog-actions .nav-btn:not([hidden]) {
      height:42px !important;
      min-height:42px !important;
      font-size:19px !important;
      padding:6px 14px !important;
    }
  }
</style>
</body>
</html>


<style id="mvip-remote-true-false-current-style-20261005-v33">
  .word-presentation-item.mvip-remote-tf-current,
  .single-exam-word-option.mvip-remote-tf-current,
  .single-exam-option.mvip-remote-tf-current {
    outline:3px solid #2563eb !important;
    outline-offset:-3px !important;
    box-shadow:inset 0 0 0 2px rgba(37,99,235,.14) !important;
  }
</style>


<!-- Bản điều chỉnh 2026-10-06 v38: PowerPoint tự chia màn hình ngay khi nhận thẻ đầu tiên. -->


<!-- Bản điều chỉnh 2026-10-06 v39:
     1) Khi nhận thẻ đầu tiên, mọi màn hình trình chiếu dùng bố cục 3/5 bên trái + 2/5 bên phải.
     2) Bảng học sinh bên phải luôn chia 4 cột và có A/B/C/D ở hàng trên cùng; cỡ chữ tự tăng đến mức lớn nhất vẫn vừa tên.
     3) Nếu bảng Kết quả câu hỏi mở, ghim bảng lên phía trên cùng của vùng trình chiếu 3/5, không che giữa câu hỏi. -->


<!-- Bản điều chỉnh 2026-10-06 v42: Sau STOP khi điều khiển PowerPoint trên điện thoại, giữ A/B/C/D đồng thời luôn hiện Slide trước/Slide sau ở hàng cuối ngay trên START/STOP để chuyển hiệu ứng hoặc slide. -->

<!-- Bản thử nghiệm v44 - sửa 2026-10-06: cho phép nút Kết quả quét hiện trong fullscreen.
     Đặt cuối tệp để ghi đè quy tắc cũ vốn ẩn nút kết quả ở fullscreen. -->
<style id="mvip-v44-scan-result-fullscreen-override-20261006">
  #wordPresentationPresenter:fullscreen .mvip-v44-scan-result-dock #wordPresentationResultBtn:not([hidden]),
  #wordPresentationPresenter:-webkit-full-screen .mvip-v44-scan-result-dock #wordPresentationResultBtn:not([hidden]),
  #wordPresentationPresenter.is-fallback-fullscreen .mvip-v44-scan-result-dock #wordPresentationResultBtn:not([hidden]),
  #singleExamPresenter:fullscreen .mvip-v44-scan-result-dock #singleExamViewBtn:not([hidden]),
  #singleExamPresenter:-webkit-full-screen .mvip-v44-scan-result-dock #singleExamViewBtn:not([hidden]),
  #singleExamPresenter.is-fallback-fullscreen .mvip-v44-scan-result-dock #singleExamViewBtn:not([hidden]),
  body.single-exam-fullscreen-fallback #singleExamPresenter .mvip-v44-scan-result-dock #singleExamViewBtn:not([hidden]) {
    display:inline-flex !important;
    visibility:visible !important;
    opacity:1 !important;
  }
  #wordPresentationPresenter:fullscreen .mvip-v44-scan-result-dock:not([hidden]),
  #wordPresentationPresenter:-webkit-full-screen .mvip-v44-scan-result-dock:not([hidden]),
  #wordPresentationPresenter.is-fallback-fullscreen .mvip-v44-scan-result-dock:not([hidden]),
  #singleExamPresenter:fullscreen .mvip-v44-scan-result-dock:not([hidden]),
  #singleExamPresenter:-webkit-full-screen .mvip-v44-scan-result-dock:not([hidden]),
  #singleExamPresenter.is-fallback-fullscreen .mvip-v44-scan-result-dock:not([hidden]),
  body.single-exam-fullscreen-fallback #singleExamPresenter .mvip-v44-scan-result-dock:not([hidden]) {
    display:flex !important;
    visibility:visible !important;
    opacity:1 !important;
    z-index:9900 !important;
  }
</style>


<!-- Bản thử nghiệm v44 - chỉnh 2026-10-07:
     Khi đang ở bố cục quét 3/5 trình chiếu + 2/5 danh sách học sinh,
     ẩn toàn bộ nút điều khiển trên vùng trình chiếu, chỉ giữ
     "Kết quả quét" và nút mũi tên sang phải (→). -->
<style id="mvip-v44-live-scan-minimal-toolbar-20261007">
  /* TRÌNH CHIẾU WORD / CÂU HỎI WORD / TÀI LIỆU */
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar > .word-presentation-title {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar {
    justify-content:flex-end !important;
    min-height:38px !important;
    height:38px !important;
    padding:3px 6px !important;
    overflow:visible !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions {
    width:100% !important;
    flex:1 1 auto !important;
    display:flex !important;
    justify-content:flex-end !important;
    align-items:center !important;
    gap:0 !important;
    overflow:visible !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions > * {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions > #wordPresentationNextBtn:not([hidden]) {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    margin-left:auto !important;
  }

  /* POWERPOINT: chỉ giữ nút sang phải trong thanh điều khiển PowerPoint. */
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter.is-powerpoint-slide-mode
  > .word-presentation-toolbar {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter.is-powerpoint-slide-mode
  > #powerPointPresentationControls {
    display:flex !important;
    justify-content:flex-end !important;
    align-items:center !important;
    min-height:38px !important;
    height:38px !important;
    padding:3px 6px !important;
    gap:0 !important;
    overflow:visible !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter.is-powerpoint-slide-mode
  > #powerPointPresentationControls > * {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter.is-powerpoint-slide-mode
  > #powerPointPresentationControls > #powerPointPresentationNextBtn:not([hidden]) {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    margin-left:auto !important;
  }

  /* DÙNG CÂU HỎI CỦA MVIP */
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar > .single-exam-toolbar-title {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar {
    justify-content:flex-end !important;
    min-height:38px !important;
    height:38px !important;
    padding:3px 6px !important;
    overflow:visible !important;
  }

  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions {
    width:100% !important;
    flex:1 1 auto !important;
    display:flex !important;
    justify-content:flex-end !important;
    align-items:center !important;
    gap:0 !important;
    overflow:visible !important;
  }

  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions > * {
    display:none !important;
  }

  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions > #regularTestNextBtn:not([hidden]) {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    margin-left:auto !important;
  }

  /* Kết quả quét nằm ở dock riêng nên luôn giữ lại khi đủ điều kiện hiển thị. */
  body.mvip-live-scan-structural-split .mvip-v44-scan-result-dock:not([hidden]) {
    display:flex !important;
    visibility:visible !important;
    opacity:1 !important;
  }
</style>


<!-- Bản thử nghiệm v44 - chỉnh 2026-10-07:
     Trong bố cục quét 3/5 + 2/5, đưa Kết quả quét lên ngay thanh trên
     và đặt hai nút điều hướng ngay bên phải theo thứ tự: Kết quả quét, ←, →. -->
<style id="mvip-v44-scan-toolbar-inline-20261007">
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions,
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions {
    position:relative !important;
    justify-content:center !important;
    align-items:center !important;
    gap:4px !important;
    overflow:visible !important;
  }

  /* Dock Kết quả quét trở thành một phần tử cùng hàng trong toolbar. */
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > .mvip-v44-scan-result-dock:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > .mvip-v44-scan-result-dock:not([hidden]) {
    position:static !important;
    inset:auto !important;
    left:auto !important;
    top:auto !important;
    right:auto !important;
    bottom:auto !important;
    width:auto !important;
    height:30px !important;
    min-height:30px !important;
    flex:0 0 auto !important;
    display:inline-flex !important;
    justify-content:center !important;
    align-items:center !important;
    padding:0 !important;
    margin:0 !important;
    pointer-events:auto !important;
    z-index:auto !important;
    order:10 !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > .mvip-v44-scan-result-dock > #wordPresentationResultBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > .mvip-v44-scan-result-dock > #singleExamViewBtn:not([hidden]) {
    display:inline-flex !important;
    min-width:154px !important;
    height:30px !important;
    min-height:30px !important;
    margin:0 !important;
  }

  /* Hiện cả mũi tên trái và phải, ngay bên phải Kết quả quét. */
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > #wordPresentationPrevBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > #wordPresentationNextBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > #regularTestPrevBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > #regularTestNextBtn:not([hidden]) {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    flex:0 0 42px !important;
    width:42px !important;
    min-width:42px !important;
    height:30px !important;
    min-height:30px !important;
    margin:0 !important;
    padding:0 !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > #wordPresentationPrevBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > #regularTestPrevBtn:not([hidden]) {
    order:20 !important;
  }

  body.mvip-live-scan-structural-split
  #wordPresentationPresenter:not(.is-powerpoint-slide-mode)
  > .word-presentation-toolbar .word-presentation-actions
  > #wordPresentationNextBtn:not([hidden]),
  body.mvip-live-scan-structural-split
  #singleExamPresenter > .single-exam-toolbar .single-exam-toolbar-actions
  > #regularTestNextBtn:not([hidden]) {
    order:30 !important;
    margin-left:0 !important;
  }
</style>
<script id="mvip-v44-scan-toolbar-inline-script-20261007">
(() => {
  'use strict';

  const configs = [
    {
      presenterId:'wordPresentationPresenter',
      toolbarSelector:':scope > .word-presentation-toolbar',
      actionsSelector:'.word-presentation-actions',
      dockId:'mvipWordScanResultDock',
      prevId:'wordPresentationPrevBtn',
      nextId:'wordPresentationNextBtn',
      rejectPowerPoint:true
    },
    {
      presenterId:'singleExamPresenter',
      toolbarSelector:':scope > .single-exam-toolbar',
      actionsSelector:'.single-exam-toolbar-actions',
      dockId:'mvipSingleScanResultDock',
      prevId:'regularTestPrevBtn',
      nextId:'regularTestNextBtn',
      rejectPowerPoint:false
    }
  ];

  const states = new Map();

  function getParts(cfg) {
    const presenter = document.getElementById(cfg.presenterId);
    const toolbar = presenter && presenter.querySelector(cfg.toolbarSelector);
    const actions = toolbar && toolbar.querySelector(cfg.actionsSelector);
    const dock = document.getElementById(cfg.dockId);
    const prev = document.getElementById(cfg.prevId);
    const next = document.getElementById(cfg.nextId);
    return {presenter, toolbar, actions, dock, prev, next};
  }

  function remember(cfg, parts) {
    if (states.has(cfg.dockId)) return;
    states.set(cfg.dockId, {
      dockParent: parts.dock && parts.dock.parentNode,
      dockNext: parts.dock && parts.dock.nextSibling
    });
  }

  function restore(cfg, parts) {
    const state = states.get(cfg.dockId);
    if (!state || !parts.dock || !state.dockParent) return;
    if (parts.dock.parentNode !== state.dockParent) {
      if (state.dockNext && state.dockNext.parentNode === state.dockParent) {
        state.dockParent.insertBefore(parts.dock, state.dockNext);
      } else {
        state.dockParent.appendChild(parts.dock);
      }
    }
  }

  function apply(cfg) {
    const parts = getParts(cfg);
    const {presenter, actions, dock, prev, next} = parts;
    if (!(presenter instanceof HTMLElement) || !(actions instanceof HTMLElement) || !(dock instanceof HTMLElement)) return;
    remember(cfg, parts);

    const split = document.body.classList.contains('mvip-live-scan-structural-split');
    const wrongMode = cfg.rejectPowerPoint && presenter.classList.contains('is-powerpoint-slide-mode');

    if (!split || wrongMode) {
      restore(cfg, parts);
      return;
    }

    /* Đặt dock trước nút ← để thứ tự DOM và hình ảnh luôn là KQ, ←, →. */
    const anchor = prev || next || null;
    if (dock.parentNode !== actions || (anchor && dock.nextSibling !== anchor)) {
      actions.insertBefore(dock, anchor);
    }

    if (prev && next && prev.parentNode === actions && next.parentNode === actions && prev.nextSibling !== next) {
      actions.insertBefore(prev, next);
    }
  }

  let queued = false;
  function syncAll() {
    if (queued) return;
    queued = true;
    requestAnimationFrame(() => {
      queued = false;
      configs.forEach(apply);
    });
  }

  const observer = new MutationObserver(syncAll);
  observer.observe(document.body, {attributes:true, attributeFilter:['class']});
  configs.forEach(cfg => {
    const p = document.getElementById(cfg.presenterId);
    if (p) observer.observe(p, {attributes:true, attributeFilter:['class','hidden','style']});
    const d = document.getElementById(cfg.dockId);
    if (d) observer.observe(d, {attributes:true, attributeFilter:['hidden','style','class']});
  });
  document.addEventListener('fullscreenchange', syncAll);
  document.addEventListener('webkitfullscreenchange', syncAll);
  document.addEventListener('click', () => setTimeout(syncAll, 0), true);
  window.addEventListener('resize', syncAll, {passive:true});
  syncAll();
})();
</script>
<!-- MVIP 2026-10-07 FINAL: Kết quả câu hỏi 4 mục trên 1 dòng v2 -->
<style id="mvip-result-one-line-final-20261007-v2">
  /* Áp dụng cuối file để thắng toàn bộ CSS cũ của các chế độ trình chiếu/split. */
  #resultModal:not([hidden]) .result-dialog-title,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-title,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-title,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-title {
    display:none !important;
  }

  #resultModal:not([hidden]) .result-dialog,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog {
    display:flex !important;
    flex-direction:row !important;
    flex-wrap:nowrap !important;
    align-items:center !important;
    justify-content:flex-start !important;
    grid-template-columns:none !important;
    grid-template-rows:none !important;
    grid-template-areas:none !important;
    column-gap:10px !important;
    row-gap:0 !important;
    gap:10px !important;
    min-height:0 !important;
    height:auto !important;
    padding:8px 12px !important;
    box-sizing:border-box !important;
    overflow:hidden !important;
  }

  #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-row,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-row {
    display:flex !important;
    flex:0 1 auto !important;
    align-items:center !important;
    gap:6px !important;
    margin:0 !important;
    padding:6px 10px !important;
    border:2px solid #3b82f6 !important;
    border-radius:9px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:clamp(15px,1.45vw,22px) !important;
    font-weight:800 !important;
    line-height:1 !important;
    white-space:nowrap !important;
  }

  #resultModal:not([hidden]) .result-correct-badge,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge,
  body.single-exam-presenting #resultModal:not([hidden]) .result-correct-badge,
  #resultModal.is-word-question-result:not([hidden]) .result-correct-badge {
    display:inline-flex !important;
    align-items:center !important;
    justify-content:center !important;
    min-width:34px !important;
    width:auto !important;
    height:32px !important;
    padding:0 9px !important;
    margin:0 !important;
    border-radius:7px !important;
    background:#9bd0ff !important;
    color:#16a34a !important;
    font-size:inherit !important;
    font-weight:900 !important;
    line-height:1 !important;
  }

  #resultModal:not([hidden]) .result-rate-line,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line,
  body.single-exam-presenting #resultModal:not([hidden]) .result-rate-line,
  #resultModal.is-word-question-result:not([hidden]) .result-rate-line {
    display:flex !important;
    flex:0 1 auto !important;
    align-items:center !important;
    justify-content:center !important;
    margin:0 !important;
    padding:8px 10px !important;
    border:2px solid #3b82f6 !important;
    border-radius:9px !important;
    background:#fff !important;
    color:#0f172a !important;
    font-size:clamp(15px,1.4vw,21px) !important;
    font-weight:800 !important;
    line-height:1 !important;
    white-space:nowrap !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions {
    display:flex !important;
    flex:0 0 auto !important;
    flex-wrap:nowrap !important;
    align-items:center !important;
    justify-content:flex-end !important;
    gap:7px !important;
    margin:0 0 0 auto !important;
    padding:0 !important;
    white-space:nowrap !important;
  }

  #resultModal:not([hidden]) #singleExamGuideBtn,
  #resultModal:not([hidden]) #resultRepickBtn {
    display:none !important;
  }

  #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
  #resultModal.is-word-question-result:not([hidden]) .result-dialog-actions .nav-btn {
    min-height:34px !important;
    height:34px !important;
    padding:5px 12px !important;
    margin:0 !important;
    border-radius:8px !important;
    font-size:clamp(14px,1.15vw,18px) !important;
    line-height:1 !important;
  }

  /* Khi có danh sách quét bên phải, bảng kết quả chỉ chiếm đúng một hàng. */
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
    height:58px !important;
    min-height:58px !important;
    max-height:58px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
    left:6px !important;
    right:6px !important;
    top:4px !important;
    bottom:auto !important;
    width:auto !important;
    max-width:none !important;
    height:50px !important;
    min-height:50px !important;
    max-height:50px !important;
    transform:none !important;
    padding:5px 8px !important;
    gap:7px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
    padding:5px 8px !important;
    font-size:clamp(13px,1.25vw,19px) !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge {
    height:28px !important;
    min-width:30px !important;
    padding:0 7px !important;
  }
  body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
    height:31px !important;
    min-height:31px !important;
    padding:4px 10px !important;
    font-size:clamp(13px,1.05vw,17px) !important;
  }

  @media (max-width:720px) {
    #resultModal:not([hidden]) .result-dialog,
    body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
    body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
    #resultModal.is-word-question-result:not([hidden]) .result-dialog {
      gap:5px !important;
      padding-left:6px !important;
      padding-right:6px !important;
    }
    #resultModal:not([hidden]) .result-dialog-row,
    #resultModal:not([hidden]) .result-rate-line {
      padding-left:6px !important;
      padding-right:6px !important;
      font-size:13px !important;
    }
  }
</style>
<script id="mvip-result-one-line-final-script-20261007-v2">
(() => {
  const title = document.getElementById('resultDialogTitle');
  if (title) {
    title.hidden = true;
    title.setAttribute('aria-hidden','true');
    title.style.setProperty('display','none','important');
  }
  const guide = document.getElementById('singleExamGuideBtn');
  if (guide) {
    guide.hidden = true;
    guide.style.setProperty('display','none','important');
  }
  const repick = document.getElementById('resultRepickBtn');
  if (repick) {
    repick.hidden = true;
    repick.style.setProperty('display','none','important');
  }
})();
</script>


<!-- MVIP 2026-10-07 ABSOLUTE LAST OVERRIDE v5: Kết quả cao + chữ lớn gấp đôi -->
<style id="mvip-result-double-size-absolute-last-v5">
#resultModal:not([hidden]) .result-dialog,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog,
body.single-exam-presenting #resultModal:not([hidden]) .result-dialog,
#resultModal.is-word-question-result:not([hidden]) .result-dialog {
  display:flex !important; flex-direction:row !important; flex-wrap:nowrap !important; align-items:center !important;
  min-height:100px !important; height:100px !important; max-height:100px !important;
  padding:10px 16px !important; gap:14px !important; overflow:hidden !important;
}
#resultModal:not([hidden]) .result-dialog-row,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-row,
#resultModal.is-word-question-result:not([hidden]) .result-dialog-row,
#resultModal:not([hidden]) .result-rate-line,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line,
body.single-exam-presenting #resultModal:not([hidden]) .result-rate-line,
#resultModal.is-word-question-result:not([hidden]) .result-rate-line {
  display:flex !important; align-items:center !important; flex:0 1 auto !important;
  margin:0 !important; padding:10px 16px !important; border:2px solid #3b82f6 !important; border-radius:12px !important;
  font-size:clamp(28px,2.6vw,40px) !important; font-weight:800 !important; line-height:1 !important; white-space:nowrap !important;
}
#resultModal:not([hidden]) .result-correct-badge,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge,
body.single-exam-presenting #resultModal:not([hidden]) .result-correct-badge,
#resultModal.is-word-question-result:not([hidden]) .result-correct-badge {
  display:inline-flex !important; align-items:center !important; justify-content:center !important;
  height:56px !important; min-width:60px !important; padding:0 14px !important; margin:0 !important;
  border-radius:10px !important; font-size:inherit !important; font-weight:900 !important; line-height:1 !important;
}
#resultModal:not([hidden]) .result-dialog-actions,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions,
body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions,
#resultModal.is-word-question-result:not([hidden]) .result-dialog-actions {
  display:flex !important; flex:0 0 auto !important; flex-wrap:nowrap !important; align-items:center !important;
  gap:12px !important; margin:0 0 0 auto !important; padding:0 !important;
}
#resultModal:not([hidden]) .result-dialog-actions .nav-btn,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
body.single-exam-presenting #resultModal:not([hidden]) .result-dialog-actions .nav-btn,
#resultModal.is-word-question-result:not([hidden]) .result-dialog-actions .nav-btn {
  height:62px !important; min-height:62px !important; padding:8px 20px !important; margin:0 !important;
  border-radius:10px !important; font-size:clamp(26px,2.2vw,36px) !important; font-weight:800 !important; line-height:1 !important;
}
body.mvip-live-scan-structural-split #resultModal:not([hidden]) {
  height:116px !important; min-height:116px !important; max-height:116px !important;
}
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog {
  top:8px !important; bottom:auto !important; left:8px !important; right:8px !important; width:auto !important;
  min-height:100px !important; height:100px !important; max-height:100px !important;
  padding:10px 14px !important; gap:12px !important; transform:none !important;
}
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-row,
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-rate-line {
  padding:10px 14px !important; font-size:clamp(28px,2.6vw,40px) !important;
}
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-correct-badge {
  height:56px !important; min-width:60px !important; padding:0 14px !important;
}
body.mvip-live-scan-structural-split #resultModal:not([hidden]) .result-dialog-actions .nav-btn {
  height:62px !important; min-height:62px !important; padding:8px 20px !important; font-size:clamp(26px,2.2vw,36px) !important;
}
</style>

<!-- MVIP ĐUA VỊT v6.2: thanh điều khiển + tên người thắng trên cùng, nhạc tự động, bể bơi cao hơn -->
<!-- MVIP 2026-10-07: Đua vịt bỏ đọc “Mời bạn + Tên học sinh”; khi vịt về nhất phát tiếng tút kiểu Vòng quay may mắn. -->
<style id="mvip-duck-race-style-20261007-v3">
  .mvip-duck-race-btn {
    width:40px; min-width:40px; height:34px; min-height:34px; padding:0 !important;
    display:inline-flex; align-items:center; justify-content:center;
    border:1px solid #16a34a !important; border-radius:9px !important;
    color:#166534 !important; background:linear-gradient(180deg,#f0fdf4,#dcfce7) !important;
    box-shadow:0 1px 3px rgba(22,101,52,.16); font-size:24px !important; line-height:1;
  }
  .mvip-duck-race-btn[hidden] { display:none !important; }
  .mvip-duck-race-btn:hover:not(:disabled) {
    color:#fff !important; border-color:#15803d !important;
    background:linear-gradient(180deg,#4ade80,#16a34a) !important;
    transform:translateY(-1px);
  }
  .mvip-duck-race-btn:disabled { opacity:.48; cursor:not-allowed; transform:none; }
  .mvip-duck-race-btn .mvip-duck-icon { display:block; transform:translateY(-1px); pointer-events:none; }

  .mvip-duck-race-modal[hidden] { display:none !important; }
  .mvip-duck-race-modal {
    position:fixed !important; inset:0 !important; z-index:2147483647 !important; display:flex; align-items:stretch; justify-content:stretch;
    width:100% !important; height:100% !important; padding:0 !important; margin:0 !important;
    box-sizing:border-box; font-family:inherit; color:#0f172a; isolation:isolate;
  }
  .mvip-duck-race-backdrop { position:absolute; inset:0; background:#e0f2fe; }
  .mvip-duck-race-dialog {
    position:relative; z-index:1; width:100% !important; height:100% !important; max-width:none !important; max-height:none !important;
    display:flex; flex-direction:column; overflow:hidden; border:0 !important; border-radius:0 !important;
    background:linear-gradient(180deg,#eff6ff 0%,#dbeafe 14%,#e0f2fe 100%);
    box-shadow:none !important;
  }
  .mvip-duck-race-head {
    flex:0 0 74px; min-height:74px; max-height:74px; display:grid;
    grid-template-columns:minmax(190px,auto) minmax(0,1fr) auto; align-items:center; gap:14px;
    padding:8px 14px; box-sizing:border-box; border-bottom:1px solid #7dd3fc; background:rgba(255,255,255,.97);
  }
  .mvip-duck-race-title-wrap { min-width:0; align-self:center; }
  .mvip-duck-race-title { margin:0; color:#0369a1; font-size:clamp(24px,2.3vw,36px); line-height:1.02; font-weight:950; }
  .mvip-duck-race-class { margin-top:2px; color:#475569; font-size:14px; font-weight:800; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
  .mvip-duck-race-top-center {
    min-width:0; display:flex; align-items:center; justify-content:center; gap:18px; overflow:hidden;
  }
  .mvip-duck-race-close {
    flex:0 0 auto; min-width:78px; min-height:40px; border:1px solid #ef4444; border-radius:11px;
    color:#b91c1c; background:#fff; font-weight:900; cursor:pointer;
  }
  .mvip-duck-race-close:hover:not(:disabled) { background:#fef2f2; }
  .mvip-duck-race-close:disabled { opacity:.45; cursor:not-allowed; }
  .mvip-duck-race-start {
    flex:0 0 auto; min-width:180px; min-height:48px; padding:0 24px; border:0; border-radius:14px; cursor:pointer;
    color:#fff; background:linear-gradient(180deg,#22c55e,#15803d); font-size:21px; font-weight:950;
    box-shadow:0 6px 14px rgba(21,128,61,.25);
  }
  .mvip-duck-race-start:hover:not(:disabled) { transform:translateY(-1px); filter:saturate(1.08); }
  .mvip-duck-race-start:disabled { opacity:.48; cursor:not-allowed; transform:none; }

  .mvip-duck-race-winner {
    flex:1 1 auto; min-width:0; max-width:min(58vw,760px); height:56px; display:flex; align-items:center; justify-content:center; gap:8px;
    padding:3px 12px; box-sizing:border-box; border-radius:12px; overflow:hidden; opacity:0; visibility:hidden;
    background:transparent; border:1px solid transparent; transition:opacity .18s ease; pointer-events:none;
  }
  .mvip-duck-race-winner.is-visible {
    opacity:1; visibility:visible; background:linear-gradient(90deg,#fef3c7,#fde68a,#fef3c7); border-color:#f59e0b;
  }
  .mvip-duck-race-winner-trophy { font-size:30px; line-height:1; flex:0 0 auto; }
  .mvip-duck-race-winner-text { min-width:0; text-align:center; }
  .mvip-duck-race-winner-caption { color:#92400e; font-size:11px; font-weight:900; text-transform:uppercase; letter-spacing:.04em; line-height:1; }
  .mvip-duck-race-winner-name { color:#b45309; font-size:clamp(21px,2.5vw,34px); line-height:1.03; font-weight:950; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }

  .mvip-duck-race-pool-wrap { flex:1 1 auto; min-height:0; overflow:hidden !important; position:relative; background:#e0f2fe; }
  .mvip-duck-race-pool {
    --name-col:clamp(120px,18vw,250px); --duck-count:1; --student-font:14px; --duck-size:28px; --duck-label-font:11px;
    position:relative; width:100%; height:100%; min-height:0; padding:2px 8px 4px; box-sizing:border-box;
    display:grid; grid-template-rows:repeat(var(--duck-count),minmax(0,1fr));
    background:
      linear-gradient(90deg,rgba(255,255,255,.20) 0 1px,transparent 1px 80px),
      repeating-linear-gradient(0deg,rgba(255,255,255,.12) 0 12px,rgba(14,165,233,.08) 12px 24px),
      linear-gradient(180deg,#38bdf8 0%,#0ea5e9 52%,#0284c7 100%);
  }
  .mvip-duck-race-lane {
    display:grid; grid-template-columns:var(--name-col) minmax(0,1fr); min-height:0; height:auto; align-items:stretch;
    border-bottom:1px dashed rgba(255,255,255,.72); position:relative; overflow:hidden;
  }
  .mvip-duck-race-lane:first-child { border-top:1px dashed rgba(255,255,255,.72); }
  .mvip-duck-race-student {
    display:flex; align-items:center; padding:0 8px; box-sizing:border-box; color:#082f49;
    background:rgba(255,255,255,.78); border-right:2px solid rgba(255,255,255,.9); font-weight:900;
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis; font-size:var(--student-font); line-height:1;
  }
  .mvip-duck-race-track { position:relative; min-width:0; overflow:hidden; }
  .mvip-duck-race-track::after {
    content:''; position:absolute; right:15px; top:0; bottom:0; width:8px; opacity:.95;
    background:repeating-linear-gradient(0deg,#fff 0 7px,#111827 7px 14px);
    box-shadow:0 0 0 1px rgba(15,23,42,.22);
  }
  .mvip-duck-racer {
    --duck-x:0px; position:absolute; left:5px; top:50%; transform:translate(0,-50%); display:inline-flex;
    align-items:center; gap:5px; max-width:calc(100% - 34px); z-index:2; will-change:transform;
  }
  .mvip-duck-racer.is-racing { transition-property:transform; transition-timing-function:linear !important; }
  .mvip-duck-emoji { font-size:var(--duck-size); line-height:1; filter:drop-shadow(0 2px 1px rgba(0,0,0,.25)); transform:scaleX(-1); transform-origin:center; display:inline-block; }
  .mvip-duck-label {
    max-width:clamp(75px,11vw,175px); padding:3px 7px; border-radius:8px; color:#0f172a;
    background:rgba(255,255,255,.92); border:1px solid rgba(15,23,42,.16); font-size:var(--duck-label-font); line-height:1; font-weight:900;
    white-space:nowrap; overflow:hidden; text-overflow:ellipsis; box-shadow:0 1px 4px rgba(2,132,199,.25);
  }
  .mvip-duck-race-lane.is-winner { background:rgba(253,224,71,.34); }
  .mvip-duck-race-lane.is-winner .mvip-duck-label { background:#fef08a; border-color:#f59e0b; color:#92400e; }
  .mvip-duck-race-empty { min-height:240px; display:flex; align-items:center; justify-content:center; color:#0c4a6e; font-size:22px; font-weight:900; }
  .mvip-duck-race-pool.is-dense .mvip-duck-label { display:none; }
  .mvip-duck-race-pool.is-very-dense .mvip-duck-race-student { padding-left:4px; padding-right:4px; }
  .mvip-duck-race-pool.is-very-dense .mvip-duck-racer { gap:1px; }
</style>
<script id="mvip-duck-race-script-20261007-v6-2">
(() => {
  'use strict';
  if (window.__mvipDuckRaceInstalled) return;
  window.__mvipDuckRaceInstalled = true;

  const wordPresenter = document.getElementById('wordPresentationPresenter');
  const wordActions = wordPresenter && wordPresenter.querySelector('.word-presentation-actions');
  const singlePresenter = document.getElementById('singleExamPresenter');
  const singleActions = singlePresenter && singlePresenter.querySelector('.single-exam-toolbar-actions');
  const regularTestStartBtn = document.getElementById('regularTestStartBtn');
  if (!(wordActions instanceof HTMLElement) || !(singleActions instanceof HTMLElement) || !(regularTestStartBtn instanceof HTMLElement)) return;

  const duckIcon = '<span class="mvip-duck-icon" aria-hidden="true">🦆</span>';

  function makeButton(id, title) {
    const btn = document.createElement('button');
    btn.type = 'button';
    btn.id = id;
    btn.className = 'mvip-duck-race-btn';
    btn.hidden = true;
    btn.disabled = true;
    btn.title = title;
    btn.setAttribute('aria-label', title);
    btn.innerHTML = duckIcon;
    return btn;
  }

  const wordBtn = makeButton('mvipDuckRaceBtn','Đua vịt gọi học sinh');
  const singleBtn = makeButton('mvipSingleDuckRaceBtn','Đua vịt gọi học sinh');
  const dashboardBtn = makeButton('mvipDashboardDuckRaceBtn','Đua vịt gọi học sinh');
  dashboardBtn.classList.add('regular-test-duck-race-btn');

  const wheelBtn = document.getElementById('cv7991MagicWheelBtn');
  const singleWheelBtn = document.getElementById('cv7991SingleMagicWheelBtn');
  const dashboardWheelBtn = document.getElementById('cv7991DashboardMagicWheelBtn');
  if (wheelBtn && wheelBtn.parentNode === wordActions) wheelBtn.insertAdjacentElement('afterend',wordBtn);
  else wordActions.insertBefore(wordBtn,wordActions.firstChild);
  if (singleWheelBtn && singleWheelBtn.parentNode === singleActions) singleWheelBtn.insertAdjacentElement('afterend',singleBtn);
  else singleActions.insertBefore(singleBtn,singleActions.firstChild);
  if (dashboardWheelBtn && dashboardWheelBtn.parentNode) dashboardWheelBtn.insertAdjacentElement('afterend',dashboardBtn);
  else regularTestStartBtn.insertAdjacentElement('afterend',dashboardBtn);

  const modal = document.createElement('div');
  modal.id = 'mvipDuckRaceModal';
  modal.className = 'mvip-duck-race-modal';
  modal.hidden = true;
  modal.setAttribute('role','dialog');
  modal.setAttribute('aria-modal','true');
  modal.setAttribute('aria-labelledby','mvipDuckRaceTitle');
  modal.innerHTML = `
    <div class="mvip-duck-race-backdrop" data-duck-race-close="1"></div>
    <section class="mvip-duck-race-dialog">
      <header class="mvip-duck-race-head">
        <div class="mvip-duck-race-title-wrap">
          <h3 class="mvip-duck-race-title" id="mvipDuckRaceTitle">🦆 Đua vịt</h3>
          <div class="mvip-duck-race-class" id="mvipDuckRaceClassText"></div>
        </div>
        <div class="mvip-duck-race-top-center">
          <button class="mvip-duck-race-start" id="mvipDuckRaceStartBtn" type="button">BẮT ĐẦU</button>
          <div class="mvip-duck-race-winner" id="mvipDuckRaceWinner" aria-live="polite">
            <div class="mvip-duck-race-winner-trophy">🏆</div>
            <div class="mvip-duck-race-winner-text">
              <div class="mvip-duck-race-winner-caption">Học sinh được gọi</div>
              <div class="mvip-duck-race-winner-name" id="mvipDuckRaceWinnerName"></div>
            </div>
          </div>
        </div>
        <button class="mvip-duck-race-close" id="mvipDuckRaceCloseBtn" type="button">Đóng</button>
      </header>
      <div class="mvip-duck-race-pool-wrap" id="mvipDuckRacePoolWrap">
        <div class="mvip-duck-race-pool" id="mvipDuckRacePool"></div>
      </div>
    </section>`;
  document.body.appendChild(modal);

  const closeBtn = modal.querySelector('#mvipDuckRaceCloseBtn');
  const startBtn = modal.querySelector('#mvipDuckRaceStartBtn');
  const classText = modal.querySelector('#mvipDuckRaceClassText');
  const winnerBox = modal.querySelector('#mvipDuckRaceWinner');
  const winnerName = modal.querySelector('#mvipDuckRaceWinnerName');
  const poolWrap = modal.querySelector('#mvipDuckRacePoolWrap');
  const pool = modal.querySelector('#mvipDuckRacePool');
  if (!(closeBtn instanceof HTMLButtonElement) || !(startBtn instanceof HTMLButtonElement)
      || !(pool instanceof HTMLElement) || !(poolWrap instanceof HTMLElement)) return;

  const race = { source:'word', mon:'', roster:[], running:false, finishTimer:0, completeTimer:0, lastFocus:null, winnerIndex:-1 };
  let duckAudioContext = null;
  let duckMusicTimer = 0;
  let duckMusicStep = 0;
  const duckMusicEnabled = true;

  function notifyDuckRemoteState() {
    try {
      if (typeof window.mvipRemoteRefreshState === 'function') window.mvipRemoteRefreshState();
    } catch (_) {}
  }

  function tierAllowed() {
    let tier = '';
    let token = false;
    try { tier = String((typeof state !== 'undefined' && state.sessionTier) || '').trim().toLowerCase(); token = !!(typeof state !== 'undefined' && state.token); } catch (_) {}
    return token && ['trial','trail','full'].includes(tier);
  }
  function normalizeMon(value) {
    const raw = String(value || '').trim();
    if (!raw) return '';
    try { return typeof normMonKey === 'function' ? normMonKey(raw) : raw; } catch (_) { return raw; }
  }
  function selectMon(source) {
    const ids = source === 'word'
      ? ['wordPresentationClassSelect','singleExamClassSelect','compactClassSubjectSelect','classSubjectSelect']
      : ['singleExamClassSelect','compactClassSubjectSelect','classSubjectSelect','wordPresentationClassSelect'];
    for (const id of ids) {
      const el = document.getElementById(id);
      if (el instanceof HTMLSelectElement) {
        const value = normalizeMon(el.value);
        if (value) return value;
      }
    }
    try { return normalizeMon(typeof state !== 'undefined' ? state.currentMon : ''); } catch (_) { return ''; }
  }
  function classLabel(mon, source) {
    const ids = source === 'word'
      ? ['wordPresentationClassSelect','singleExamClassSelect','compactClassSubjectSelect','classSubjectSelect']
      : ['singleExamClassSelect','compactClassSubjectSelect','classSubjectSelect','wordPresentationClassSelect'];
    for (const id of ids) {
      const el = document.getElementById(id);
      if (!(el instanceof HTMLSelectElement)) continue;
      const opt = Array.from(el.options || []).find((o) => normalizeMon(o.value) === normalizeMon(mon));
      const text = String((opt && opt.textContent) || '').trim();
      if (text) return text;
    }
    return String(mon || '');
  }
  function rosterFor(mon) {
    const key = normalizeMon(mon);
    if (!key) return [];
    let students = {}, dropped = {};
    try {
      students = typeof classDataStudents === 'function' ? classDataStudents(key) : {};
      dropped = typeof classDataDroppedStudents === 'function' ? classDataDroppedStudents(key) : {};
    } catch (_) {}
    let ids = [];
    try {
      ids = typeof sortedStudentKeysFromMap === 'function'
        ? sortedStudentKeysFromMap(students)
        : Object.keys(students || {}).sort((a,b) => String(a).localeCompare(String(b),'vi',{numeric:true}));
    } catch (_) { ids = Object.keys(students || {}); }
    ids = ids.filter((id) => !(dropped && dropped[id]));
    const widths = ids.filter((id) => /^\d+$/.test(String(id))).map((id) => String(id).length);
    const pad = Math.max(2,widths.length ? Math.max(...widths) : 2);
    return ids.map((id,index) => {
      const raw = String(id || '').trim();
      return {
        id:raw,
        displayId:/^\d+$/.test(raw) ? raw.padStart(pad,'0') : (raw || String(index + 1).padStart(2,'0')),
        name:String((students && students[id]) || '').trim() || 'Chưa có tên học sinh'
      };
    });
  }
  function randomInt(maxExclusive) {
    const max = Math.max(1,Number(maxExclusive) || 1);
    if (window.crypto && typeof window.crypto.getRandomValues === 'function') {
      const arr = new Uint32Array(1);
      window.crypto.getRandomValues(arr);
      return Math.floor((arr[0] / 4294967296) * max);
    }
    return Math.floor(Math.random() * max);
  }
  function shuffledIndexes(n) {
    const a = Array.from({length:n},(_,i) => i);
    for (let i = a.length - 1; i > 0; i--) {
      const j = randomInt(i + 1);
      const t = a[i]; a[i] = a[j]; a[j] = t;
    }
    return a;
  }
  function escapeHtml(s) {
    return String(s == null ? '' : s).replace(/[&<>"']/g,(c) => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c]));
  }
  function duckRaceHost() {
    const fs = document.fullscreenElement;
    return fs instanceof HTMLElement ? fs : document.body;
  }
  function mountDuckRaceOnTop() {
    const host = duckRaceHost();
    if (host && modal.parentElement !== host) host.appendChild(modal);
  }
  function fitRosterToOneScreen() {
    // Không thay đổi kích thước làn/vịt/tên trong lúc đang đua.
    // Việc reflow giữa chừng có thể làm transition transform bị khựng trên fullscreen.
    if (race.running) return;
    const count = Math.max(1, race.roster.length || 1);
    const h = Math.max(120, poolWrap.clientHeight || 120);
    const lane = h / count;
    const studentFont = Math.max(6, Math.min(16, lane * 0.44));
    const duckSize = Math.max(8, Math.min(30, lane * 0.80));
    const labelFont = Math.max(6, Math.min(12, lane * 0.38));
    pool.style.setProperty('--duck-count', String(count));
    pool.style.setProperty('--student-font', `${studentFont.toFixed(1)}px`);
    pool.style.setProperty('--duck-size', `${duckSize.toFixed(1)}px`);
    pool.style.setProperty('--duck-label-font', `${labelFont.toFixed(1)}px`);
    pool.classList.toggle('is-dense', lane < 24);
    pool.classList.toggle('is-very-dense', lane < 14);
  }
  function ensureDuckAudio() {
    if (!duckMusicEnabled) return null;
    try {
      const Ctx = window.AudioContext || window.webkitAudioContext;
      if (!Ctx) return null;
      if (!duckAudioContext) duckAudioContext = new Ctx();
      if (duckAudioContext.state === 'suspended') duckAudioContext.resume().catch(() => {});
      return duckAudioContext;
    } catch (_) { return null; }
  }
  function duckTone(freq, duration = .13, gainValue = .035, type = 'triangle', delay = 0) {
    const ctx = ensureDuckAudio();
    if (!ctx || !duckMusicEnabled) return;
    try {
      const osc = ctx.createOscillator();
      const gain = ctx.createGain();
      const now = ctx.currentTime + Math.max(0, delay);
      osc.type = type; osc.frequency.setValueAtTime(freq, now);
      gain.gain.setValueAtTime(0.0001, now);
      gain.gain.exponentialRampToValueAtTime(gainValue, now + .015);
      gain.gain.exponentialRampToValueAtTime(0.0001, now + duration);
      osc.connect(gain); gain.connect(ctx.destination);
      osc.start(now); osc.stop(now + duration + .03);
    } catch (_) {}
  }
  function stopDuckMusic() {
    if (duckMusicTimer) { clearInterval(duckMusicTimer); duckMusicTimer = 0; }
  }
  function startDuckMusic() {
    stopDuckMusic();
    if (!duckMusicEnabled) return;
    ensureDuckAudio();
    const melody = [523.25,659.25,783.99,659.25,698.46,880.00,783.99,659.25];
    duckMusicStep = 0;
    const tick = () => {
      if (!race.running || !duckMusicEnabled) return;
      const note = melody[duckMusicStep++ % melody.length];
      duckTone(note,.14,.035,'triangle');
      if (duckMusicStep % 2 === 0) duckTone(note / 2,.11,.018,'sine',.02);
    };
    tick();
    duckMusicTimer = window.setInterval(tick,220);
  }
  function playDuckFinishFanfare() {
    // Khi vịt về nhất: phát một tiếng "tút" kiểu Vòng quay may mắn,
    // không dùng giọng đọc tên học sinh để âm thanh ổn định trên mọi máy.
    if (!duckMusicEnabled) return;
    const ctx = ensureDuckAudio();
    if (!ctx) return;
    try {
      const oscillator = ctx.createOscillator();
      const gain = ctx.createGain();
      const now = ctx.currentTime;
      oscillator.type = 'sine';
      oscillator.frequency.setValueAtTime(880, now);
      oscillator.frequency.exponentialRampToValueAtTime(1320, now + .18);
      gain.gain.setValueAtTime(.0001, now);
      gain.gain.exponentialRampToValueAtTime(.14, now + .025);
      gain.gain.exponentialRampToValueAtTime(.0001, now + .52);
      oscillator.connect(gain);
      gain.connect(ctx.destination);
      oscillator.start(now);
      oscillator.stop(now + .55);
    } catch (_) {}
  }
  function renderRoster() {
    winnerBox.classList.remove('is-visible');
    winnerName.textContent = '';
    race.winnerIndex = -1;
    if (!race.roster.length) {
      pool.innerHTML = '<div class="mvip-duck-race-empty">Lớp này chưa có học sinh để đua.</div>';
      return;
    }
    pool.innerHTML = race.roster.map((stu,index) => `
      <div class="mvip-duck-race-lane" data-duck-index="${index}">
        <div class="mvip-duck-race-student" title="${escapeHtml(stu.displayId + ' ' + stu.name)}">${escapeHtml(stu.displayId + ' ' + stu.name)}</div>
        <div class="mvip-duck-race-track">
          <div class="mvip-duck-racer" data-duck-racer="${index}">
            <span class="mvip-duck-label">${escapeHtml(stu.name)}</span>
            <span class="mvip-duck-emoji" aria-hidden="true">🦆</span>
          </div>
        </div>
      </div>`).join('');
    poolWrap.scrollTop = 0;
    requestAnimationFrame(fitRosterToOneScreen);
  }
  function resetRacePositions() {
    if (race.finishTimer) { clearTimeout(race.finishTimer); race.finishTimer = 0; }
    if (race.completeTimer) { clearTimeout(race.completeTimer); race.completeTimer = 0; }
    pool.querySelectorAll('.mvip-duck-race-lane').forEach((lane) => lane.classList.remove('is-winner'));
    pool.querySelectorAll('.mvip-duck-racer').forEach((el) => {
      el.classList.remove('is-racing'); el.style.transitionDuration = '0ms'; el.style.transform = 'translate(0,-50%)';
    });
    winnerBox.classList.remove('is-visible'); winnerName.textContent = '';
    void pool.offsetWidth;
  }
  function finishRace(index) {
    // Chỉ ghi nhận con về đích đầu tiên; không dừng các con còn lại.
    if (!race.running || !race.roster[index] || race.finishTimer === -1) return;
    race.finishTimer = -1;
    race.winnerIndex = index;
    const stu = race.roster[index];
    const lane = pool.querySelector(`.mvip-duck-race-lane[data-duck-index="${index}"]`);
    if (lane instanceof HTMLElement) lane.classList.add('is-winner');
    winnerName.textContent = `${stu.displayId} ${stu.name}`;
    winnerBox.classList.add('is-visible');
    playDuckFinishFanfare();
  }
  function completeRace() {
    if (!race.running) return;
    race.running = false;
    race.completeTimer = 0;
    startBtn.disabled = false;
    startBtn.textContent = 'ĐUA LẠI';
    closeBtn.disabled = false;
    stopDuckMusic();
    notifyDuckRemoteState();
    requestAnimationFrame(fitRosterToOneScreen);
  }
  function startRace() {
    if (race.running || race.roster.length < 1) return;
    resetRacePositions();
    // Chốt kích thước bể bơi trước khi khóa layout cho toàn bộ cuộc đua.
    fitRosterToOneScreen();
    race.running = true;
    startBtn.disabled = true;
    closeBtn.disabled = true;
    startBtn.textContent = 'ĐANG ĐUA…';
    notifyDuckRemoteState();
    startDuckMusic();
    const order = shuffledIndexes(race.roster.length);
    const rankOf = new Array(race.roster.length);
    order.forEach((idx,rank) => { rankOf[idx] = rank; });
    const minMs = 4200;
    const spreadMs = 3000;
    const spacing = race.roster.length > 1 ? spreadMs / (race.roster.length - 1) : 0;
    const racers = Array.from(pool.querySelectorAll('.mvip-duck-racer'));
    const winnerIndex = order[0];
    race.winnerIndex = winnerIndex;
    requestAnimationFrame(() => requestAnimationFrame(() => {
      let maxDuration = minMs;
      racers.forEach((el,index) => {
        if (!(el instanceof HTMLElement)) return;
        const track = el.parentElement;
        if (!(track instanceof HTMLElement)) return;
        const available = Math.max(0,track.clientWidth - el.offsetWidth - 24);
        const duration = Math.round(minMs + (rankOf[index] || 0) * spacing + (rankOf[index] ? randomInt(55) : 0));
        maxDuration = Math.max(maxDuration, duration);
        el.classList.add('is-racing');
        el.style.transitionDuration = `${duration}ms`;
        el.style.transform = `translate(${available}px,-50%)`;
      });
      // Công bố người thắng khi con nhanh nhất chạm đích, nhưng vẫn để tất cả
      // vịt tiếp tục bơi đến đích. Chỉ kết thúc cuộc đua sau con cuối cùng.
      race.finishTimer = window.setTimeout(() => finishRace(winnerIndex), minMs + 45);
      race.completeTimer = window.setTimeout(() => completeRace(), maxDuration + 120);
    }));
  }
  function openRace(source) {
    if (!tierAllowed()) {
      try {
        if (typeof showAccessDialog === 'function') showAccessDialog('Vòng quay và Đua vịt chỉ dành cho tài khoản Trial và Full.');
        else alert('Đua vịt chỉ dành cho tài khoản Trial và Full.');
      } catch (_) { alert('Đua vịt chỉ dành cho tài khoản Trial và Full.'); }
      return;
    }
    const mon = selectMon(source);
    const roster = rosterFor(mon);
    if (!mon) { alert('Bạn chọn Lớp-Môn trước.'); return; }
    if (!roster.length) { alert('Lớp-Môn này chưa có danh sách học sinh.'); return; }
    race.source = source; race.mon = mon; race.roster = roster; race.running = false;
    race.lastFocus = document.activeElement instanceof HTMLElement ? document.activeElement : null;
    classText.textContent = `${classLabel(mon,source)} · ${roster.length} học sinh`;
    startBtn.disabled = false; closeBtn.disabled = false; startBtn.textContent = 'BẮT ĐẦU';
    mountDuckRaceOnTop();
    modal.hidden = false;
    document.documentElement.classList.add('modal-open');
    notifyDuckRemoteState();
    renderRoster();
    requestAnimationFrame(() => {
      fitRosterToOneScreen();
      startBtn.focus({preventScroll:true});
    });
  }
  function closeRace() {
    if (race.running) return;
    if (race.finishTimer) { clearTimeout(race.finishTimer); race.finishTimer = 0; }
    stopDuckMusic();
    modal.hidden = true;
    document.documentElement.classList.remove('modal-open');
    notifyDuckRemoteState();
    if (modal.parentElement !== document.body) document.body.appendChild(modal);
    const focus = race.lastFocus; race.lastFocus = null;
    if (focus instanceof HTMLElement && document.contains(focus)) {
      try { focus.focus({preventScroll:true}); } catch (_) {}
    }
  }
  function refreshButton(button, source, presentation) {
    if (!(button instanceof HTMLButtonElement)) return;
    const allowed = tierAllowed();
    const mon = selectMon(source);
    const roster = allowed && mon ? rosterFor(mon) : [];
    if (presentation instanceof HTMLElement) button.hidden = presentation.hidden;
    else button.hidden = false;
    button.disabled = allowed ? (!mon || roster.length < 1) : false;
    button.title = !allowed ? 'Đua vịt chỉ dành cho tài khoản Trial và Full'
      : (!mon ? 'Chọn Lớp-Môn trước' : (roster.length ? `Đua vịt · ${classLabel(mon,source)} · ${roster.length} học sinh` : 'Lớp-Môn này chưa có danh sách học sinh'));
  }
  function refreshButtons() {
    refreshButton(wordBtn,'word',wordPresenter);
    refreshButton(singleBtn,'mvip',singlePresenter);
    refreshButton(dashboardBtn,'mvip',null);
  }

  wordBtn.addEventListener('click',() => openRace('word'));
  singleBtn.addEventListener('click',() => openRace('mvip'));
  dashboardBtn.addEventListener('click',() => openRace('mvip'));
  startBtn.addEventListener('click',startRace);
  closeBtn.addEventListener('click',closeRace);
  modal.addEventListener('click',(event) => {
    const target = event.target;
    if (target instanceof Element && target.closest('[data-duck-race-close="1"]')) closeRace();
  });
  document.addEventListener('keydown',(event) => {
    if (modal.hidden) return;
    if (event.key === 'Escape' && !race.running) { event.preventDefault(); closeRace(); }
    if ((event.key === 'Enter' || event.key === ' ') && document.activeElement === startBtn && !startBtn.disabled) {
      event.preventDefault(); startRace();
    }
  },true);
  document.addEventListener('fullscreenchange',() => {
    if (modal.hidden) return;
    mountDuckRaceOnTop();
    requestAnimationFrame(fitRosterToOneScreen);
  });
  window.addEventListener('resize',() => {
    if (!modal.hidden) requestAnimationFrame(fitRosterToOneScreen);
  });
  if (typeof ResizeObserver === 'function') {
    const duckResizeObserver = new ResizeObserver(() => { if (!modal.hidden) fitRosterToOneScreen(); });
    duckResizeObserver.observe(poolWrap);
  }
  ['wordPresentationClassSelect','singleExamClassSelect','compactClassSubjectSelect','classSubjectSelect'].forEach((id) => {
    const el = document.getElementById(id); if (el) el.addEventListener('change',refreshButtons);
  });
  const observer = new MutationObserver(refreshButtons);
  if (wordPresenter instanceof HTMLElement) observer.observe(wordPresenter,{attributes:true,attributeFilter:['hidden','class']});
  if (singlePresenter instanceof HTMLElement) observer.observe(singlePresenter,{attributes:true,attributeFilter:['hidden','class']});
  document.addEventListener('mvip-session-updated',refreshButtons);
  window.addEventListener('focus',refreshButtons);
  window.mvipDuckRace = {
    open: (source = 'word') => openRace(source === 'mvip' ? 'mvip' : 'word'),
    start: () => startRace(),
    close: () => closeRace(),
    isOpen: () => !modal.hidden,
    isRunning: () => !!race.running,
  };
  setInterval(refreshButtons,1500);
  refreshButtons();
})();
</script>