.MLKmjG_app-container{background:#f8fafc;min-height:100vh;padding-bottom:3rem;font-family:Inter,Segoe UI,system-ui,sans-serif}.dark .MLKmjG_app-container{color:#f1f5f9;background:#0b1329}.MLKmjG_top-bar{z-index:100;background:#fff;border-bottom:1px solid #e2e8f0;padding:0 1.25rem;position:sticky;top:0}.dark .MLKmjG_top-bar{background:#0f172a;border-color:#1e293b}.MLKmjG_top-bar-inner{grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;max-width:1200px;margin:0 auto;padding:.55rem 0;display:grid}.MLKmjG_top-bar-left{justify-content:flex-start;align-items:center;min-width:0;display:flex}.MLKmjG_top-bar-center{justify-content:center;align-items:center;display:flex}.MLKmjG_top-bar-right{justify-content:flex-end;align-items:center;min-width:0;display:flex}.MLKmjG_breadcrumb{align-items:center;gap:.3rem;display:flex}.MLKmjG_bc-link{color:#64748b;align-items:center;gap:.2rem;font-size:.82rem;text-decoration:none;transition:color .15s;display:flex}.MLKmjG_bc-link:hover{color:#4299e1}.MLKmjG_bc-sep{color:#bee3f8;font-size:.75rem}.dark .MLKmjG_bc-sep{color:#334155}.MLKmjG_bc-current{color:#1e293b;font-size:.82rem;font-weight:600}.dark .MLKmjG_bc-current{color:#f1f5f9}.MLKmjG_mode-tabs{background:#f1f5f9;border-radius:10px;gap:2px;padding:3px;display:flex}.dark .MLKmjG_mode-tabs{background:#1e293b}.MLKmjG_mode-tab{color:#64748b;cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px;align-items:center;gap:.4rem;padding:.42rem 1rem;font-size:.82rem;font-weight:600;transition:all .15s;display:flex}.dark .MLKmjG_mode-tab{color:#94a3b8}.MLKmjG_mode-tab:hover{color:#1e293b}.dark .MLKmjG_mode-tab:hover{color:#f1f5f9}.MLKmjG_mode-tab.MLKmjG_active{color:#3b82f6;background:#fff;box-shadow:0 1px 4px #0000001a}.dark .MLKmjG_mode-tab.MLKmjG_active{color:#60a5fa;background:#0f172a;box-shadow:0 1px 4px #0000004d}.MLKmjG_main-content{padding:1.25rem}.MLKmjG_content-layout{grid-template-columns:200px 1fr 280px;align-items:start;gap:1.25rem;max-width:1200px;margin:0 auto;padding:0;display:grid}.MLKmjG_question-sidebar{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:1rem;position:sticky;top:76px}.dark .MLKmjG_question-sidebar{background:#0f172a;border-color:#1e293b}.MLKmjG_sidebar-header{color:#94a3b8;text-transform:uppercase;letter-spacing:.06em;margin-bottom:.75rem;font-size:.78rem;font-weight:700}.MLKmjG_question-list{flex-wrap:wrap;gap:.4rem;margin-bottom:1rem;display:flex}.MLKmjG_q-dot{color:#64748b;cursor:pointer;background:#f1f5f9;border:1.5px solid #e2e8f0;border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;font-size:.75rem;font-weight:700;transition:all .15s;display:flex}.dark .MLKmjG_q-dot{color:#94a3b8;background:#1e293b;border-color:#334155}.MLKmjG_q-dot:hover{color:#4299e1;border-color:#4299e1}.MLKmjG_q-dot.MLKmjG_answered{color:#4299e1;background:#ebf8ff;border-color:#4299e1}.dark .MLKmjG_q-dot.MLKmjG_answered{color:#93c5fd;background:#4299e133;border-color:#60a5fa}.MLKmjG_q-dot.MLKmjG_correct{color:#16a34a;background:#dcfce7;border-color:#22c55e}.dark .MLKmjG_q-dot.MLKmjG_correct{color:#86efac;background:#22c55e33;border-color:#4ade80}.MLKmjG_q-dot.MLKmjG_incorrect{color:#dc2626;background:#fee2e2;border-color:#ef4444}.dark .MLKmjG_q-dot.MLKmjG_incorrect{color:#fca5a5;background:#ef444433;border-color:#f87171}.MLKmjG_q-dot.MLKmjG_unanswered-mark{color:#a16207;background:#fef9c3;border-color:#eab308}.dark .MLKmjG_q-dot.MLKmjG_unanswered-mark{color:#fde047;background:#eab30833;border-color:#facc15}.MLKmjG_q-dot.MLKmjG_active{box-shadow:0 0 0 2px #4299e1}.MLKmjG_sidebar-actions{border-top:1px solid #e2e8f0;padding-top:1rem}.dark .MLKmjG_sidebar-actions{border-color:#1e293b}.MLKmjG_pre-submit{flex-direction:column;gap:.6rem;display:flex}.MLKmjG_progress-pill{background:#f1f5f9;border-radius:99px;height:6px;overflow:hidden}.dark .MLKmjG_progress-pill{background:#1e293b}.MLKmjG_progress-fill-bar{background:linear-gradient(90deg,#4299e1,#63b3ed);border-radius:99px;height:100%;transition:width .3s}.MLKmjG_progress-label{color:#64748b;font-size:.75rem;font-weight:500}.dark .MLKmjG_progress-label{color:#94a3b8}.MLKmjG_result-summary{flex-direction:column;align-items:center;gap:.6rem;display:flex}.MLKmjG_result-score-ring{color:#1e293b;background:#f0fdf4;border:4px solid #22c55e;border-radius:50%;justify-content:center;align-items:center;gap:0;width:72px;height:72px;font-size:1.2rem;font-weight:800;display:flex}.dark .MLKmjG_result-score-ring{color:#f1f5f9;background:#22c55e1a}.MLKmjG_ring-num{color:#16a34a;font-size:1.3rem;font-weight:800}.dark .MLKmjG_ring-num{color:#4ade80}.MLKmjG_ring-total{color:#64748b;font-size:.75rem}.dark .MLKmjG_ring-total{color:#94a3b8}.MLKmjG_result-pct{color:#1e293b;font-size:1.1rem;font-weight:800}.dark .MLKmjG_result-pct{color:#f1f5f9}.MLKmjG_result-rows{flex-direction:column;gap:.3rem;width:100%;display:flex}.MLKmjG_rrow{border-radius:8px;align-items:center;gap:.4rem;padding:.3rem .5rem;font-size:.8rem;font-weight:600;display:flex}.MLKmjG_rrow.MLKmjG_correct{color:#16a34a;background:#f0fdf4}.dark .MLKmjG_rrow.MLKmjG_correct{color:#86efac;background:#22c55e26}.MLKmjG_rrow.MLKmjG_incorrect{color:#dc2626;background:#fef2f2}.dark .MLKmjG_rrow.MLKmjG_incorrect{color:#fca5a5;background:#ef444426}.MLKmjG_rrow.MLKmjG_skip{color:#a16207;background:#fefce8}.dark .MLKmjG_rrow.MLKmjG_skip{color:#fde047;background:#eab30826}.MLKmjG_action-btn{cursor:pointer;border:none;border-radius:10px;justify-content:center;align-items:center;gap:.4rem;width:100%;padding:.55rem .75rem;font-size:.82rem;font-weight:700;transition:all .15s;display:flex}.MLKmjG_action-btn.MLKmjG_primary{color:#fff;background:linear-gradient(135deg,#4299e1,#63b3ed);box-shadow:0 3px 10px #4299e14d}.MLKmjG_action-btn.MLKmjG_primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 16px #4299e166}.MLKmjG_action-btn.MLKmjG_primary:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.MLKmjG_action-btn.MLKmjG_danger{color:#dc2626;background:#fef2f2;border:1px solid #fecaca}.dark .MLKmjG_action-btn.MLKmjG_danger{color:#fca5a5;background:#ef444426;border-color:#ef44444d}.MLKmjG_action-btn.MLKmjG_danger:disabled{opacity:.4;cursor:not-allowed}.MLKmjG_questions-container{flex-direction:column;gap:1rem;display:flex}.MLKmjG_question-card{background:#fff;border:1px solid #e2e8f0;border-left-width:4px;border-radius:16px;padding:1.25rem;transition:border-color .2s,box-shadow .2s}.dark .MLKmjG_question-card{background:#0f172a;border-color:#1e293b #1e293b #1e293b #334155}.MLKmjG_question-card:hover{box-shadow:0 4px 16px #00000012}.dark .MLKmjG_question-card:hover{box-shadow:0 4px 16px #0000004d}.MLKmjG_card-correct{border-left-color:#22c55e!important}.MLKmjG_card-incorrect{border-left-color:#ef4444!important}.MLKmjG_card-skip{border-left-color:#eab308!important}.MLKmjG_qcard-header{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.MLKmjG_qcard-right{align-items:center;gap:8px;display:flex}.MLKmjG_qcard-num{color:#fff;background:linear-gradient(135deg,#4299e1,#63b3ed);border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;font-size:.88rem;font-weight:800;display:flex}.MLKmjG_badge{border-radius:99px;align-items:center;gap:.3rem;padding:.2rem .6rem;font-size:.75rem;font-weight:600;display:inline-flex}.MLKmjG_badge-pending{color:#64748b;background:#f1f5f9}.dark .MLKmjG_badge-pending{color:#94a3b8;background:#1e293b}.MLKmjG_badge-done{color:#4299e1;background:#ebf8ff}.dark .MLKmjG_badge-done{color:#93c5fd;background:#4299e133}.MLKmjG_badge-skip{color:#a16207;background:#fefce8}.dark .MLKmjG_badge-skip{color:#fde047;background:#eab30833}.MLKmjG_badge-correct{color:#16a34a;background:#dcfce7}.dark .MLKmjG_badge-correct{color:#86efac;background:#22c55e33}.MLKmjG_badge-wrong{color:#dc2626;background:#fee2e2}.dark .MLKmjG_badge-wrong{color:#fca5a5;background:#ef444433}.MLKmjG_report-btn{color:#b91c1c;cursor:pointer;background:#fff5f5;border:1px solid #fecaca;border-radius:999px;align-items:center;gap:4px;padding:4px 10px;font-size:.72rem;font-weight:700;transition:all .15s;display:inline-flex}.dark .MLKmjG_report-btn{color:#f87171;background:#ef44441f;border-color:#ef444440}.MLKmjG_report-btn:hover{background:#fee2e2}.dark .MLKmjG_report-btn:hover{background:#ef444440}.MLKmjG_audio-section{width:100%;margin-bottom:1rem}.MLKmjG_play-btn{color:#4299e1;cursor:pointer;background:#ebf8ff;border:none;border-radius:99px;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.82rem;font-weight:600;transition:all .15s;display:inline-flex}.dark .MLKmjG_play-btn{color:#93c5fd;background:#4299e12e}.MLKmjG_play-btn:hover,.MLKmjG_play-btn.MLKmjG_playing{color:#fff;background:#4299e1}.MLKmjG_dialogue-section{background:#f8fafc;border-radius:12px;flex-direction:column;gap:.6rem;margin-bottom:1rem;padding:1rem;display:flex}.dark .MLKmjG_dialogue-section{background:#1e293b}.MLKmjG_dialogue-line{align-items:flex-start;gap:.6rem;display:flex}.MLKmjG_speaker-tag{color:#4299e1;background:#ebf8ff;border-radius:6px;flex-shrink:0;margin-top:3px;padding:.15rem .5rem;font-size:.72rem;font-weight:700}.dark .MLKmjG_speaker-tag{color:#93c5fd;background:#4299e140}.MLKmjG_text-content{flex-direction:column;flex:1;gap:.25rem;display:flex}.MLKmjG_sentence-main-wrap{width:100%}.MLKmjG_sentence-main-wrap .sentence-wrapper{background:0 0;min-height:auto;margin:0;padding:0}.MLKmjG_sentence-main-wrap .translation{color:#64748b;margin-top:.35rem;font-size:.82rem}.dark .MLKmjG_sentence-main-wrap .translation{color:#94a3b8}.MLKmjG_sentence-main-wrap .blank-line{border-bottom-width:2px;min-width:2.1rem}.dark .MLKmjG_sentence-main-wrap .blank-line{border-bottom-color:#94a3b8}.dark .MLKmjG_sentence-main-wrap .hanzi{color:#f1f5f9}.MLKmjG_options-section{margin-bottom:.75rem}.MLKmjG_options-label{color:#475569;align-items:center;gap:.4rem;margin-bottom:.65rem;font-size:.8rem;font-weight:700;display:flex}.dark .MLKmjG_options-label{color:#94a3b8}.MLKmjG_options-grid{grid-template-columns:1fr 1fr;gap:.5rem;display:grid}.MLKmjG_opt-btn{cursor:pointer;text-align:left;background:#f8fafc;border:1.5px solid #e2e8f0;border-radius:12px;align-items:center;gap:.6rem;padding:.65rem .75rem;transition:all .15s;display:flex;position:relative}.dark .MLKmjG_opt-btn{background:#1e293b;border-color:#334155}.MLKmjG_opt-btn:hover:not(:disabled){background:#ebf8ff;border-color:#4299e1}.dark .MLKmjG_opt-btn:hover:not(:disabled){background:#4299e126;border-color:#60a5fa}.MLKmjG_opt-btn:disabled{cursor:default}.MLKmjG_opt-btn.MLKmjG_opt-selected{background:#ebf8ff;border-color:#4299e1}.dark .MLKmjG_opt-btn.MLKmjG_opt-selected{background:#4299e140;border-color:#60a5fa}.MLKmjG_opt-btn.MLKmjG_opt-correct{background:#f0fdf4!important;border-color:#22c55e!important}.dark .MLKmjG_opt-btn.MLKmjG_opt-correct{background:#22c55e33!important;border-color:#4ade80!important}.MLKmjG_opt-btn.MLKmjG_opt-wrong{background:#fef2f2!important;border-color:#ef4444!important}.dark .MLKmjG_opt-btn.MLKmjG_opt-wrong{background:#ef444433!important;border-color:#f87171!important}.MLKmjG_opt-letter{color:#1e293b;background:#e2e8f0;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:.78rem;font-weight:800;display:flex}.dark .MLKmjG_opt-letter{color:#f1f5f9;background:#334155}.MLKmjG_opt-btn.MLKmjG_opt-selected .MLKmjG_opt-letter{color:#fff;background:#4299e1}.MLKmjG_opt-btn.MLKmjG_opt-correct .MLKmjG_opt-letter{color:#fff;background:#22c55e}.MLKmjG_opt-btn.MLKmjG_opt-wrong .MLKmjG_opt-letter{color:#fff;background:#ef4444}.MLKmjG_opt-body{flex-direction:column;gap:.15rem;min-width:0;display:flex}.MLKmjG_opt-zh{font-size:calc(1rem + var(--chinese-font-size-adjust,0px));font-weight:var(--chinese-font-weight,600);color:#1e293b;font-family:var(--chinese-font,"LXGW WenKai", "Noto Sans SC", sans-serif)}.dark .MLKmjG_opt-zh{color:#f1f5f9}.MLKmjG_opt-detail{flex-direction:column;gap:.1rem;display:flex}.MLKmjG_opt-py{color:#4299e1;font-size:.72rem;font-style:italic}.dark .MLKmjG_opt-py{color:#93c5fd}.MLKmjG_opt-vi{color:#64748b;font-size:.72rem}.dark .MLKmjG_opt-vi{color:#94a3b8}.MLKmjG_opt-check{color:#22c55e;font-size:1rem;position:absolute;top:50%;right:.6rem;transform:translateY(-50%)}.MLKmjG_typing-section{margin-bottom:.75rem}.MLKmjG_typing-label{color:#475569;align-items:center;gap:.4rem;margin-bottom:.65rem;font-size:.8rem;font-weight:700;display:flex}.dark .MLKmjG_typing-label{color:#94a3b8}.MLKmjG_typing-row{align-items:center;gap:.5rem;display:flex}.MLKmjG_type-input{color:#1e293b;background:#f8fafc;border:1.5px solid #e2e8f0;border-radius:12px;outline:none;flex:1;padding:.65rem .9rem;font-size:1rem;transition:border-color .15s}.dark .MLKmjG_type-input{color:#f1f5f9;background:#1e293b;border-color:#334155}.MLKmjG_type-input:focus{background:#fff;border-color:#4299e1}.dark .MLKmjG_type-input:focus{background:#0f172a}.MLKmjG_type-input:disabled{cursor:default}.MLKmjG_type-input.MLKmjG_type-correct{background:#f0fdf4;border-color:#22c55e}.dark .MLKmjG_type-input.MLKmjG_type-correct{background:#22c55e26;border-color:#4ade80}.MLKmjG_type-input.MLKmjG_type-wrong{background:#fef2f2;border-color:#ef4444}.dark .MLKmjG_type-input.MLKmjG_type-wrong{background:#ef444426;border-color:#f87171}.MLKmjG_hint-btn{color:#d97706;cursor:pointer;background:#fffbeb;border:1.5px solid #e2e8f0;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1rem;transition:all .15s;display:flex}.dark .MLKmjG_hint-btn{color:#f59e0b;background:#f59e0b26;border-color:#f59e0b4d}.MLKmjG_hint-btn:hover{background:#fef3c7;border-color:#d97706}.MLKmjG_hint-chip{color:#92400e;background:#fffbeb;border:1px solid #fde68a;border-radius:99px;align-items:center;gap:.35rem;margin-top:.4rem;padding:.3rem .75rem;font-size:.78rem;font-weight:500;display:inline-flex}.dark .MLKmjG_hint-chip{color:#fde047;background:#f59e0b26;border-color:#f59e0b4d}.MLKmjG_correct-answer-display{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:10px;align-items:center;gap:.4rem;margin-top:.5rem;padding:.4rem .75rem;font-size:.82rem;display:flex}.dark .MLKmjG_correct-answer-display{color:#86efac;background:#22c55e26;border-color:#22c55e4d}.MLKmjG_explanation-box{background:#f8fafc;border:1px solid #cbd5e1;border-left:4px solid #f59e0b;border-radius:12px;margin-top:.75rem;padding:.9rem 1rem}.dark .MLKmjG_explanation-box{background:#111827;border-color:#334155 #334155 #334155 #f59e0b;border-left-style:solid;border-left-width:4px}.MLKmjG_expl-title{color:#b45309;align-items:center;gap:.4rem;margin-bottom:.4rem;font-size:.82rem;font-weight:700;display:flex}.dark .MLKmjG_expl-title{color:#fbbf24}.MLKmjG_expl-text{color:#334155;white-space:pre-line;margin:0 0 .45rem;font-size:.85rem;line-height:1.65}.dark .MLKmjG_expl-text{color:#e2e8f0}.MLKmjG_expl-full{color:#475569;white-space:pre-line;margin:0;font-size:.82rem}.dark .MLKmjG_expl-full{color:#cbd5e1}.MLKmjG_lessons-sidebar{position:sticky;top:76px}.MLKmjG_dialog-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:var(--z-modal-base,10000);background:#00000073;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.MLKmjG_dialog-card{background:#fff;border-radius:24px;flex-direction:column;align-items:center;gap:.75rem;width:100%;max-width:420px;padding:2rem;animation:.2s MLKmjG_pop-in;display:flex;box-shadow:0 24px 60px #0003}.dark .MLKmjG_dialog-card{background:#0f172a;border:1px solid #1e293b;box-shadow:0 24px 60px #00000080}@keyframes MLKmjG_pop-in{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.MLKmjG_dialog-icon-wrap{color:#fff;background:linear-gradient(135deg,#4299e1,#63b3ed);border-radius:16px;justify-content:center;align-items:center;width:56px;height:56px;display:flex}.MLKmjG_dialog-title{color:#1e293b;margin:0;font-size:1.15rem;font-weight:800}.dark .MLKmjG_dialog-title{color:#f1f5f9}.MLKmjG_dialog-sub{color:#64748b;text-align:center;margin:0;font-size:.82rem}.dark .MLKmjG_dialog-sub{color:#94a3b8}.MLKmjG_dialog-stats-row{gap:.75rem;width:100%;display:flex}.MLKmjG_ds-item{border-radius:12px;flex-direction:column;flex:1;align-items:center;gap:.2rem;padding:.75rem;font-size:.8rem;font-weight:600;display:flex}.MLKmjG_ds-item.MLKmjG_done{color:#16a34a;background:#f0fdf4}.dark .MLKmjG_ds-item.MLKmjG_done{color:#86efac;background:#22c55e26}.MLKmjG_ds-item.MLKmjG_skip{color:#a16207;background:#fefce8}.dark .MLKmjG_ds-item.MLKmjG_skip{color:#fde047;background:#eab30826}.MLKmjG_ds-item strong{font-size:1.5rem;font-weight:800}.MLKmjG_dialog-warn{color:#dc2626;text-align:center;background:#fef2f2;border:1px solid #fecaca;border-radius:10px;align-items:center;gap:.4rem;width:100%;margin:0;padding:.5rem .75rem;font-size:.8rem;font-weight:600;display:flex}.dark .MLKmjG_dialog-warn{color:#fca5a5;background:#ef444426;border-color:#ef44444d}.MLKmjG_dialog-btns{gap:.6rem;width:100%;margin-top:.25rem;display:flex}.MLKmjG_dbtn{cursor:pointer;border:none;border-radius:12px;flex:1;padding:.65rem;font-size:.9rem;font-weight:700;transition:all .15s}.MLKmjG_dbtn.MLKmjG_cancel{color:#475569;background:#f1f5f9}.dark .MLKmjG_dbtn.MLKmjG_cancel{color:#94a3b8;background:#1e293b}.MLKmjG_dbtn.MLKmjG_cancel:hover{background:#e2e8f0}.dark .MLKmjG_dbtn.MLKmjG_cancel:hover{background:#334155}.MLKmjG_dbtn.MLKmjG_confirm{color:#fff;background:linear-gradient(135deg,#4299e1,#63b3ed);box-shadow:0 4px 12px #4299e159}.MLKmjG_dbtn.MLKmjG_confirm:hover{transform:translateY(-1px);box-shadow:0 6px 18px #4299e173}@media (max-width:1100px){.MLKmjG_content-layout{grid-template-columns:180px 1fr}.MLKmjG_lessons-sidebar{display:none}}@media (max-width:768px){.MLKmjG_content-layout{grid-template-columns:1fr}.MLKmjG_question-sidebar{position:static}.MLKmjG_options-grid{grid-template-columns:1fr}.MLKmjG_main-content{padding:.75rem}.MLKmjG_top-bar-inner{flex-direction:column;align-items:center;gap:.6rem;padding:.6rem 0;display:flex}.MLKmjG_top-bar-right{display:none}}
