C
</div></div><div data-question-id="ex_1" data-answer-id="opt_1_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><footer></div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Mọi thứ hiển thị trên màn hình trình duyệt đều nằm trong <body>.</p></div></div></div><div class="quiz-question-wrapper" data-index="2" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 3</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Cặp thẻ nào dùng để khai báo tiêu đề trang web (hiển thị trên tab trình duyệt)?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_2" data-answer-id="opt_2_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><h1></div></div><div data-question-id="ex_2" data-answer-id="opt_2_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><header></div></div><div data-question-id="ex_2" data-answer-id="opt_2_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><title></div></div><div data-question-id="ex_2" data-answer-id="opt_2_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><meta></div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium"><title> nằm trong <head> định nghĩa tiêu đề trang.</p></div></div></div><div class="quiz-question-wrapper" data-index="3" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 4</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Để khai báo cấu trúc chuẩn của HTML5, dòng đầu tiên của file phải là?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_3" data-answer-id="opt_3_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><html></div></div><div data-question-id="ex_3" data-answer-id="opt_3_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><head></div></div><div data-question-id="ex_3" data-answer-id="opt_3_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><!DOCTYPE html></div></div><div data-question-id="ex_3" data-answer-id="opt_3_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><body></div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">DOCTYPE giúp trình duyệt biết phiên bản HTML đang sử dụng.</p></div></div></div><div class="quiz-question-wrapper" data-index="4" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 5</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Phần nào chứa các thông tin mô tả về trang web nhưng không hiển thị trực tiếp cho người dùng?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_4" data-answer-id="opt_4_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><body></div></div><div data-question-id="ex_4" data-answer-id="opt_4_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><head></div></div><div data-question-id="ex_4" data-answer-id="opt_4_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><footer></div></div><div data-question-id="ex_4" data-answer-id="opt_4_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><main></div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium"><head> chứa tiêu đề, khai báo CSS, JavaScript và metadata.</p></div></div></div><div class="quiz-question-wrapper" data-index="5" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 6</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Thẻ nào dùng để tạo tiêu đề lớn nhất trong trang web?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_5" data-answer-id="opt_5_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><h6></div></div><div data-question-id="ex_5" data-answer-id="opt_5_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><head></div></div><div data-question-id="ex_5" data-answer-id="opt_5_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><h1></div></div><div data-question-id="ex_5" data-answer-id="opt_5_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><title></div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">HTML có từ <h1> đến <h6>, trong đó <h1> là lớn nhất.</p></div></div></div><div class="quiz-question-wrapper" data-index="6" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 7</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>HTML là loại ngôn ngữ gì?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_6" data-answer-id="opt_6_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ngôn ngữ lập trình</div></div><div data-question-id="ex_6" data-answer-id="opt_6_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ngôn ngữ máy</div></div><div data-question-id="ex_6" data-answer-id="opt_6_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ngôn ngữ đánh dấu</div></div><div data-question-id="ex_6" data-answer-id="opt_6_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Hệ điều hành</div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">HTML dùng các thẻ để đánh dấu cấu trúc nội dung.</p></div></div></div><div class="quiz-question-wrapper" data-index="7" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 8</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Dấu hiệu nào nhận biết một thẻ kết thúc (đóng thẻ) trong HTML?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_7" data-answer-id="opt_7_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Dấu / trước tên thẻ</div></div><div data-question-id="ex_7" data-answer-id="opt_7_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Dấu / sau tên thẻ</div></div><div data-question-id="ex_7" data-answer-id="opt_7_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Dấu !</div></div><div data-question-id="ex_7" data-answer-id="opt_7_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Dấu ?</div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Ví dụ: </body> là thẻ đóng của <body>.</p></div></div></div><div class="quiz-question-wrapper" data-index="8" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 9</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Trình duyệt web đóng vai trò gì đối với file HTML?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_8" data-answer-id="opt_8_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Là nơi soạn thảo</div></div><div data-question-id="ex_8" data-answer-id="opt_8_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Là nơi thông dịch và hiển thị nội dung HTML</div></div><div data-question-id="ex_8" data-answer-id="opt_8_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Là nơi lưu trữ file</div></div><div data-question-id="ex_8" data-answer-id="opt_8_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Là công cụ vẽ ảnh</div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Trình duyệt đọc mã HTML và vẽ ra trang web tương ứng.</p></div></div></div><div class="quiz-question-wrapper" data-index="9" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 10</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Trắc nghiệm đơn</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Thẻ <p> dùng để định nghĩa đối tượng nào?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><div class="space-y-3"><div data-question-id="ex_9" data-answer-id="opt_9_0" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">A</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Một hình ảnh</div></div><div data-question-id="ex_9" data-answer-id="opt_9_1" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">B</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Một đoạn văn bản (Paragraph)</div></div><div data-question-id="ex_9" data-answer-id="opt_9_2" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">C</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Một liên kết</div></div><div data-question-id="ex_9" data-answer-id="opt_9_3" data-type="single_choice" class="flex items-center p-4 rounded-xl border-2 transition-all duration-150 select-none border-gray-250 dark:border-slate-800/80 hover:bg-gray-50 dark:hover:bg-slate-800/40 text-gray-700 dark:text-slate-300 cursor-pointer option-item"><div class="w-6 h-6 rounded-full mr-3 flex items-center justify-center font-bold text-xs transition-colors border bg-gray-100 border-gray-300 text-gray-500 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400">D</div><div class="text-sm md:text-base font-medium flex-1 [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Một tiêu đề</div></div></div><!-- Đúng / Sai Options Container (msq) --><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Thẻ <p> dùng cho các đoạn văn nội dung.</p></div></div></div><div class="quiz-question-wrapper" data-index="10" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 11</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Đúng / Sai</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>HTML là gì?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><!-- Đúng / Sai Options Container (msq) --><div class="space-y-4"><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_10_0"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">A</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ngôn ngữ đánh dấu</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_10" data-answer-id="opt_10_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_10" data-answer-id="opt_10_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_10_1"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">B</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ngôn ngữ lập trình</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_10" data-answer-id="opt_10_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_10" data-answer-id="opt_10_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_10_2"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">C</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Để tạo cấu trúc trang web</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_10" data-answer-id="opt_10_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_10" data-answer-id="opt_10_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_10_3"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">D</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">HyperText Markup Language</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_10" data-answer-id="opt_10_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_10" data-answer-id="opt_10_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div></div><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">HTML là ngôn ngữ đánh marks dùng để tạo cấu trúc trang web.</p></div></div></div><div class="quiz-question-wrapper" data-index="11" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 12</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Đúng / Sai</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Thẻ HTML nào hợp lệ?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><!-- Đúng / Sai Options Container (msq) --><div class="space-y-4"><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_11_0"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">A</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><html></div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_11" data-answer-id="opt_11_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_11" data-answer-id="opt_11_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_11_1"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">B</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><body></div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_11" data-answer-id="opt_11_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_11" data-answer-id="opt_11_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_11_2"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">C</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><script></div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_11" data-answer-id="opt_11_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_11" data-answer-id="opt_11_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_11_3"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">D</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1"><style></div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_11" data-answer-id="opt_11_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_11" data-answer-id="opt_11_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div></div><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Tất cả đều là thẻ HTML hợp lệ.</p></div></div></div><div class="quiz-question-wrapper" data-index="12" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 13</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Đúng / Sai</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>Thuộc tính của thẻ HTML viết ở đâu?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><!-- Đúng / Sai Options Container (msq) --><div class="space-y-4"><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_12_0"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">A</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Trong thẻ mở</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_12" data-answer-id="opt_12_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_12" data-answer-id="opt_12_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_12_1"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">B</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Trong thẻ đóng</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_12" data-answer-id="opt_12_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_12" data-answer-id="opt_12_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_12_2"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">C</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ở giữa nội dung</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_12" data-answer-id="opt_12_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_12" data-answer-id="opt_12_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_12_3"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">D</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Ở dòng riêng</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_12" data-answer-id="opt_12_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_12" data-answer-id="opt_12_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div></div><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">Thuộc tính được viết trong thẻ mở.</p></div></div></div><div class="quiz-question-wrapper" data-index="13" style="display: none;"><div class="bg-white border border-gray-250 dark:bg-slate-900 dark:border-slate-800/80 rounded-2xl p-6 shadow-sm mb-6 transition-colors duration-200"><!-- Header: Question Number and Difficulty --><div class="flex items-center justify-between mb-4"><span class="inline-flex items-center px-3 py-1 rounded-xl text-xs font-bold bg-gray-100 text-gray-700 dark:bg-slate-800 dark:text-slate-300">Câu 14</span><div class="flex items-center space-x-2"><!-- Question Type --><span class="text-xs font-semibold text-gray-400 dark:text-slate-500">Đúng / Sai</span><!-- Difficulty Badge --><span class="inline-flex items-center px-2 py-0.5 rounded text-[10px] font-extrabold uppercase bg-amber-50 text-amber-600 dark:bg-amber-950/20 dark:text-amber-400">Trung bình</span></div></div><!-- Question Content --><div class="text-base md:text-lg font-semibold text-gray-800 dark:text-slate-100 mb-6 leading-relaxed whitespace-pre-wrap select-none question-text [&_img]:max-w-full [&_img]:rounded-lg [&_img]:mx-auto [&_img]:my-3 [&_p]:inline"><p>HTML5 hỗ trợ tính năng nào mới?</p>
</div><!-- Standard Options Container (single_choice, multiple_choice, true_false) --><!-- Đúng / Sai Options Container (msq) --><div class="space-y-4"><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_13_0"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">A</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Video/Audio tích hợp</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_13" data-answer-id="opt_13_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_13" data-answer-id="opt_13_0" data-option-letter="A" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_13_1"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">B</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Canvas vẽ đồ họa</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_13" data-answer-id="opt_13_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_13" data-answer-id="opt_13_1" data-option-letter="B" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_13_2"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">C</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Storage cục bộ</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_13" data-answer-id="opt_13_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_13" data-answer-id="opt_13_2" data-option-letter="C" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div><div class="flex flex-col sm:flex-row sm:items-center justify-between p-4 rounded-xl border transition-all gap-3 msq-row border-gray-200 dark:border-slate-800/80 bg-white dark:bg-slate-900" data-answer-id="opt_13_3"><div class="flex items-start flex-1 min-w-0"><span class="msq-letter w-6 h-6 rounded-lg bg-gray-100 dark:bg-slate-800 text-gray-500 dark:text-slate-450 flex items-center justify-center font-bold text-xs mr-3 shrink-0 transition-colors">D</span><div class="msq-text text-sm md:text-base font-medium text-gray-700 dark:text-slate-300 leading-relaxed transition-colors [&_img]:max-w-full [&_img]:rounded-md [&_img]:my-1">Flash</div></div><div class="flex items-center gap-3 shrink-0 self-end sm:self-center"><div class="flex items-center gap-2"><button type="button" data-msq-button="Đúng" data-question-id="ex_13" data-answer-id="opt_13_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Đúng</button><button type="button" data-msq-button="Sai" data-question-id="ex_13" data-answer-id="opt_13_3" data-option-letter="D" class="px-4 py-1.5 rounded-lg text-xs font-bold transition-all border bg-gray-50 border-gray-200 text-gray-600 dark:bg-slate-800 dark:border-slate-700 dark:text-slate-400 hover:bg-gray-100 dark:hover:bg-slate-750">Sai</button></div></div></div></div><!-- Short Answer Container (sa) --><!-- Essay / Tự luận Container (tl) --><!-- Review Mode: Show Explanation --></div><div class="quiz-feedback-box hidden mt-6 p-6 rounded-2xl border transition-colors duration-200"><div class="flex items-center space-x-3 mb-3"><span class="feedback-icon w-8 h-8 rounded-full flex items-center justify-center text-white"></span><h4 class="feedback-title font-bold text-base"></h4></div><p class="feedback-text text-sm leading-relaxed mb-4"></p><div class="p-4 rounded-xl bg-black/5 dark:bg-white/5 border border-black/10 dark:border-white/5"><h5 class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-1">Lời giải chi tiết:</h5><p class="text-sm text-gray-700 dark:text-slate-300 leading-relaxed font-medium">HTML5 hỗ trợ video/audio, canvas, localStorage. Flash đã bị ngừng.</p></div></div></div><div class="flex justify-end mt-4 space-x-3"><button id="retry-quiz-btn" class="hidden bg-gray-200 hover:bg-gray-300 text-gray-800 font-semibold px-5 py-2.5 rounded-xl shadow-sm text-sm transition dark:bg-slate-800 dark:text-slate-200 dark:hover:bg-slate-700">Làm lại</button><button id="check-answer-btn" class="bg-blue-600 hover:bg-blue-700 text-white font-semibold px-5 py-2.5 rounded-xl shadow text-sm transition">Kiểm tra đáp án</button><button id="next-question-btn" class="hidden bg-blue-600 hover:bg-blue-700 text-white font-semibold px-5 py-2.5 rounded-xl shadow text-sm transition">Làm tiếp</button></div></div><div id="quiz-final-result" class="hidden mt-6 p-8 text-center rounded-2xl bg-blue-50 dark:bg-blue-900/20 border border-blue-100 dark:border-blue-800/50"><h3 class="text-2xl font-bold text-blue-700 dark:text-blue-400 mb-2">Hoàn thành bài tập!</h3><p class="text-gray-600 dark:text-slate-300 mb-4" id="quiz-final-score"></p><button onclick="window.location.reload()" class="bg-blue-600 hover:bg-blue-700 text-white font-bold px-6 py-3 rounded-xl shadow-sm transition inline-flex items-center"><svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 mr-2" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2"><path stroke-linecap="round" stroke-linejoin="round" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"></path></svg>Làm lại từ đầu</button></div></div><!-- Next / Prev Buttons --><div class="flex items-center justify-between pt-8 border-t border-gray-250 dark:border-slate-850 mt-12 gap-4"><a href="/lms/tin-hoc-12/tin12-bai-06-giao-tiep-va-ung-xu-trong-khong-gian-mang" class="flex-1 group flex flex-col p-4 rounded-2xl border border-gray-200 dark:border-slate-800 hover:border-blue-300 dark:hover:border-blue-700 bg-white dark:bg-slate-900 hover:shadow-md transition-all"><span class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-2 flex items-center"><svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 mr-1 transform group-hover:-translate-x-1 transition-transform" viewBox="0 0 20 20" fill="currentColor"><path fill-rule="evenodd" d="M9.707 16.707a1 1 0 01-1.414 0l-6-6a1 1 0 010-1.414l6-6a1 1 0 011.414 1.414L5.414 9H17a1 1 0 110 2H5.414l4.293 4.293a1 1 0 010 1.414z" clip-rule="evenodd"></path></svg>Bài trước</span><span class="font-bold text-sm text-gray-900 dark:text-slate-200 group-hover:text-blue-600 dark:group-hover:text-blue-400 line-clamp-2">Giao tiếp và ứng xử trong không gian mạng</span></a><a href="/lms/tin-hoc-12/tin12-bai-08-dinh-dang-van-ban" class="flex-1 group flex flex-col p-4 rounded-2xl border border-gray-200 dark:border-slate-800 hover:border-blue-300 dark:hover:border-blue-700 bg-white dark:bg-slate-900 hover:shadow-md transition-all text-right items-end"><span class="text-xs font-bold text-gray-500 dark:text-slate-400 uppercase tracking-wider mb-2 flex items-center">Bài tiếp theo<svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 ml-1 transform group-hover:translate-x-1 transition-transform" viewBox="0 0 20 20" fill="currentColor"><path fill-rule="evenodd" d="M10.293 3.293a1 1 0 011.414 0l6 6a1 1 0 010 1.414l-6 6a1 1 0 01-1.414-1.414L14.586 11H3a1 1 0 110-2h11.586l-4.293-4.293a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg></span><span class="font-bold text-sm text-gray-900 dark:text-slate-200 group-hover:text-blue-600 dark:group-hover:text-blue-400 line-clamp-2">Định dạng văn bản</span></a></div></div></div></main><footer class="border-t border-scholar/60 dark:border-[#3A3A5C]/70 bg-white/60 dark:bg-[#1A1A2E]/60 pt-12 pb-16 px-6 md:px-8 mt-16 transition-colors duration-200"><div class="max-w-7xl mx-auto grid grid-cols-1 md:grid-cols-3 gap-8"><!-- Column 1: Intro + Auth / Theme Buttons --><div class="md:col-span-2 space-y-4"><a href="/lms/" class="flex items-center space-x-2"><div class="w-8 h-8 rounded-lg bg-vermillion-500 flex items-center justify-center font-bold text-white shadow-lg shadow-vermillion-500/20">L</div><span class="text-xl font-bold tracking-tight font-serif text-ink dark:text-[#E8E0D0]">LỚP 12 LMS</span></a><p class="text-sm text-[#8A7E72] dark:text-[#8A8A9E] max-w-sm leading-relaxed font-medium">Hệ thống học tập, ôn thi trắc nghiệm online bám sát chương trình Giáo dục Phổ thông lớp 12 của Bộ Giáo dục và Đào tạo Việt Nam.</p><p class="text-xs text-[#A89888] dark:text-[#6A6A8A] font-semibold">© 2026 Lớp 12 LMS. 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finalResult.classList.remove('hidden');
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newWrapper.style.display = 'block';
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if (counter) counter.textContent = `${currentQuestionIndex + 1} / ${totalQuestions}`;
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checkBtn.classList.remove('hidden');
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