:root{--primary:#5b6ef5;--primary-dark:#4754d4;--primary-light:#eef0fe;--primary-soft:#f5f6ff;--bg:#f6f7fb;--card:#fff;--text:#2d2d3a;--text-secondary:#6b7280;--text-light:#9ca3af;--border:#ebedf2;--border-strong:#dde0e8;--success:#22c55e;--danger:#ef4444;--warning:#f59e0b;--shadow-sm:0 1px 3px #0000000f;--shadow-md:0 4px 16px #00000014;--shadow-lg:0 12px 40px #0000001a;--radius:14px;--radius-sm:10px;--max-width:960px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);min-height:100vh;color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif}.page-container{flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:40px 20px;display:flex}.loading-container{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.loading-spinner{border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:48px;height:48px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.start-page{text-align:center;background:var(--bg);flex-direction:column;justify-content:center;align-items:center;width:100%;min-height:100vh;display:flex;position:relative}.start-page .top-bar{align-items:center;gap:12px;display:flex;position:absolute;top:20px;left:24px;right:24px}.start-page .user-badge{background:var(--primary-light);color:var(--primary);border-radius:20px;padding:8px 16px;font-size:14px;font-weight:600}.start-page .admin-btn,.start-page .logout-btn{background:var(--card);border:1px solid var(--border-strong);color:var(--text-secondary);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:20px;padding:8px 16px;font-size:14px;transition:all .25s}.start-page .admin-btn:hover,.start-page .logout-btn:hover{color:var(--primary);border-color:var(--primary);box-shadow:var(--shadow-md)}.start-page .logout-btn{margin-left:auto}.start-page .logout-btn:hover{color:var(--danger);border-color:var(--danger)}.start-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid var(--border);width:100%;max-width:480px;padding:56px 64px}.day-display{color:var(--text);letter-spacing:2px;margin-bottom:24px;font-size:56px;font-weight:800}.time-limit-display{background:var(--primary-light);color:var(--primary);border-radius:20px;align-items:center;gap:8px;margin-bottom:24px;padding:8px 20px;font-size:15px;font-weight:600;display:inline-flex}.notes-display{color:var(--text-secondary);max-width:360px;min-height:24px;margin-bottom:40px;font-size:16px;line-height:1.7}.start-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:140px;height:140px;margin:0 auto;font-size:22px;font-weight:700;transition:all .3s;display:flex;box-shadow:0 8px 28px #5b6ef559}.start-btn:hover{background:var(--primary-dark);transform:scale(1.05);box-shadow:0 12px 36px #5b6ef573}.start-btn:active{transform:scale(.96)}.start-btn.continue{background:var(--success);box-shadow:0 8px 28px #22c55e59}.start-btn.continue:hover{background:#16a34a;box-shadow:0 12px 36px #22c55e73}.start-buttons{flex-direction:column;align-items:center;gap:18px;display:flex}.restart-link{color:var(--text-light);cursor:pointer;background:0 0;border:none;font-size:14px;transition:color .25s}.restart-link:hover{color:var(--primary)}.exercise-page{background:var(--bg);width:100%;min-height:100vh;position:relative}.exit-btn{background:var(--card);border:1px solid var(--border-strong);color:var(--text-secondary);cursor:pointer;z-index:50;box-shadow:var(--shadow-sm);border-radius:20px;padding:9px 18px;font-size:14px;transition:all .25s;position:fixed;top:20px;left:24px}.exit-btn:hover{color:var(--primary);border-color:var(--primary);box-shadow:var(--shadow-md)}.section-intro{background:var(--card);z-index:100;flex-direction:column;justify-content:center;align-items:center;animation:.4s fadeIn;display:flex;position:fixed;inset:0}.section-intro h1{color:var(--text);margin-bottom:12px;font-size:44px;font-weight:800}.section-intro .section-dot{background:var(--primary);border-radius:50%;width:12px;height:12px;margin-bottom:20px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.fade-out{animation:.8s forwards fadeOut}.progress-bar-container{background:var(--border);z-index:50;width:100%;height:4px;position:fixed;top:0;left:0}.progress-bar{background:var(--primary);height:100%;transition:width .3s}.timer-display{background:var(--card);color:var(--primary);z-index:50;box-shadow:var(--shadow-sm);border:1px solid var(--border);font-variant-numeric:tabular-nums;border-radius:20px;padding:8px 18px;font-size:17px;font-weight:700;position:fixed;top:20px;right:24px}.listening-section{flex-direction:column;align-items:center;min-height:100vh;padding:80px 20px 40px;display:flex}.listen-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);text-align:center;width:100%;max-width:440px;margin:auto;padding:56px 72px}.listening-section .audio-icon{margin-bottom:20px;font-size:64px}.listening-section p{color:var(--text-secondary);font-size:18px}.listening-text-wrap{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;max-width:680px;margin:0 auto;padding:80px 24px 120px;display:flex}.listening-text-content{color:var(--text);text-align:center;white-space:pre-wrap;word-break:break-word;width:100%;max-width:640px;margin-bottom:40px;font-size:22px;line-height:2.1}.grammar-section{flex-direction:column;align-items:center;min-height:100vh;padding:80px 20px 100px;display:flex}.grammar-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);max-width:var(--max-width);width:100%;padding:40px 48px}.question-text{text-align:center;color:var(--text);max-width:680px;margin:32px 0;font-size:20px;line-height:1.8}.question-number{color:var(--text-light);margin-bottom:8px;font-size:14px;font-weight:600}.options-container{flex-direction:column;gap:14px;width:100%;max-width:540px;margin:16px auto 0;display:flex}.option-item{border:2px solid var(--border-strong);cursor:pointer;background:var(--card);border-radius:14px;align-items:center;gap:14px;padding:14px 22px;transition:all .25s;display:flex}.option-item:hover{border-color:var(--primary);background:var(--primary-soft)}.option-item.selected{border-color:var(--primary);background:var(--primary);color:#fff}.option-label{background:var(--primary-light);width:36px;height:36px;color:var(--primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:15px;font-weight:700;display:flex}.option-item.selected .option-label{color:#fff;background:#ffffff40}.option-text{font-size:16px;line-height:1.4}.nav-buttons{gap:14px;display:flex;position:fixed;bottom:32px;right:32px}.nav-btn{cursor:pointer;border:none;border-radius:22px;padding:11px 28px;font-size:15px;font-weight:600;transition:all .25s}.nav-btn.prev{background:var(--card);color:var(--text-secondary);border:1px solid var(--border-strong);box-shadow:var(--shadow-sm)}.nav-btn.next{background:var(--primary);color:#fff;box-shadow:0 4px 14px #5b6ef54d}.nav-btn.prev:hover{color:var(--primary);border-color:var(--primary)}.nav-btn.next:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 18px #5b6ef566}.nav-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}.dictation-section{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:80px 20px 60px;display:flex}.dictation-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);width:100%;max-width:520px;padding:48px 64px}.prep-timer{border:4px solid var(--primary);width:110px;height:110px;color:var(--primary);font-variant-numeric:tabular-nums;border-radius:50%;justify-content:center;align-items:center;margin:20px auto;font-size:34px;font-weight:700;display:flex}.big-timer{color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:2px;margin:24px 0;font-size:68px;font-weight:800}.pause-info{color:var(--text-secondary);margin:12px 0;font-size:16px}.pause-btn{background:var(--warning);color:#fff;cursor:pointer;border:none;border-radius:22px;margin-top:20px;padding:12px 32px;font-size:16px;font-weight:600;transition:all .25s}.pause-btn:hover{background:#d97706}.pause-btn:disabled{background:var(--border-strong);color:var(--text-light);cursor:not-allowed}.task-box{background:var(--primary-soft);border-radius:var(--radius-sm);border:1px solid var(--primary-light);margin-top:20px;padding:16px 24px}.task-box strong{color:var(--text)}.task-box p{color:var(--text-secondary);margin-top:8px;font-size:15px}.reading-section{max-width:1200px;min-height:100vh;margin:0 auto;padding-top:60px;display:flex}.reading-left{border-right:1px solid var(--border);background:var(--card);border-radius:var(--radius) 0 0 var(--radius);flex:1;max-height:calc(100vh - 60px);padding:24px 32px;overflow-y:auto}.reading-right{background:var(--bg);flex-direction:column;flex:1;max-height:calc(100vh - 60px);padding:24px 32px;display:flex;overflow-y:auto}.reading-sentence{cursor:pointer;border-radius:4px;padding:8px 6px;font-size:15px;line-height:1.9;transition:background .2s;position:relative}.reading-sentence:hover{background:var(--primary-soft)}.reading-sentence.annotated{border-bottom:2px solid var(--danger)}.annotation-badge{background:var(--danger);color:#fff;border-radius:10px;margin-left:5px;padding:1px 7px;font-size:11px;font-weight:600;display:inline-block}.login-page{background:var(--bg)}.student-login-box{width:380px}.student-login-box input{border:2px solid var(--border-strong);border-radius:var(--radius-sm);outline:none;width:100%;margin-bottom:16px;padding:13px 16px;font-size:15px;transition:border-color .25s}.student-login-box input:focus{border-color:var(--primary)}.student-login-box button[type=submit]{background:var(--primary);color:#fff;border-radius:var(--radius-sm);cursor:pointer;border:none;width:100%;padding:13px;font-size:16px;font-weight:600;transition:background .25s}.student-login-box button[type=submit]:hover{background:var(--primary-dark)}.student-login-box button[type=submit]:disabled{opacity:.6;cursor:not-allowed}.login-hint{background:var(--primary-soft);border-radius:var(--radius-sm);color:var(--text-secondary);margin-top:20px;padding:12px;font-size:13px}.login-hint p{text-align:center}.admin-login{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-box{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);text-align:center;border:1px solid var(--border);width:380px;padding:44px}.login-box h2{color:var(--text);margin-bottom:28px;font-weight:700}.login-box input{border:2px solid var(--border-strong);border-radius:var(--radius-sm);outline:none;width:100%;margin-bottom:16px;padding:13px 16px;font-size:15px;transition:border-color .25s}.login-box input:focus{border-color:var(--primary)}.login-box button[type=submit]{background:var(--primary);color:#fff;border-radius:var(--radius-sm);cursor:pointer;border:none;width:100%;padding:13px;font-size:16px;font-weight:600;transition:background .25s}.login-box button[type=submit]:hover{background:var(--primary-dark)}.error-msg{color:var(--danger);margin-top:12px;font-size:14px}.admin-panel{background:var(--bg);max-width:1100px;min-height:100vh;margin:0 auto;padding:24px}.admin-header{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:20px;padding:18px 28px;display:flex}.admin-header h1{color:var(--text);font-size:22px;font-weight:700}.admin-tabs{flex-wrap:wrap;gap:10px;margin-bottom:20px;display:flex}.admin-tab{border:1px solid var(--border-strong);border-radius:var(--radius-sm);cursor:pointer;background:var(--card);color:var(--text-secondary);box-shadow:var(--shadow-sm);padding:10px 22px;font-size:14px;font-weight:500;transition:all .25s}.admin-tab:hover{color:var(--primary);border-color:var(--primary)}.admin-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.admin-content{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border);padding:32px}.form-group{margin-bottom:24px}.form-group label{color:var(--text);margin-bottom:8px;font-size:14px;font-weight:600;display:block}.form-group input,.form-group textarea,.form-group select{border:2px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--card);width:100%;color:var(--text);outline:none;padding:11px 15px;font-size:15px;transition:border-color .25s}.form-group input:focus,.form-group textarea:focus{border-color:var(--primary)}.form-group textarea{resize:vertical;min-height:100px}.save-btn{background:var(--primary);color:#fff;border-radius:var(--radius-sm);cursor:pointer;border:none;padding:12px 32px;font-size:15px;font-weight:600;transition:all .25s;box-shadow:0 4px 14px #5b6ef54d}.save-btn:hover{background:var(--primary-dark);box-shadow:0 6px 18px #5b6ef566}.question-editor{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);margin-bottom:16px;padding:20px}.question-editor input{border:1px solid var(--border-strong);background:var(--card);width:100%;color:var(--text);border-radius:8px;outline:none;margin-bottom:8px;padding:9px 13px;font-size:14px;transition:border-color .25s}.question-editor input:focus{border-color:var(--primary)}.add-btn{background:var(--success);color:#fff;cursor:pointer;border:none;border-radius:8px;margin-top:12px;padding:9px 18px;font-size:14px;font-weight:600;transition:background .25s}.add-btn:hover{background:#16a34a}.remove-btn{background:var(--danger);color:#fff;cursor:pointer;border:none;border-radius:6px;margin-left:10px;padding:5px 12px;font-size:12px;transition:opacity .25s}.remove-btn:hover{opacity:.85}.records-table{border-collapse:collapse;width:100%}.records-table th,.records-table td{border:1px solid var(--border);text-align:left;padding:11px 16px;font-size:14px}.records-table th{background:var(--bg);color:var(--text);font-weight:600}.back-btn{background:var(--card);color:var(--text-secondary);border:1px solid var(--border-strong);border-radius:var(--radius-sm);cursor:pointer;box-shadow:var(--shadow-sm);padding:9px 18px;font-size:14px;font-weight:500;transition:all .25s}.back-btn:hover{color:var(--primary);border-color:var(--primary)}.complete-page{text-align:center;padding:40px}.complete-page h1{color:var(--success);margin-bottom:20px;font-size:44px;font-weight:800}.complete-page p{color:var(--text-secondary);font-size:19px}.day-selector{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.day-btn{border:2px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--card);cursor:pointer;color:var(--text-secondary);padding:9px 18px;font-size:14px;font-weight:500;transition:all .25s}.day-btn:hover{border-color:var(--primary);color:var(--primary)}.day-btn.active{border-color:var(--primary);background:var(--primary);color:#fff}.passage-editor{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);margin-bottom:16px;padding:20px}.passage-editor textarea{border:1px solid var(--border-strong);background:var(--card);width:100%;min-height:80px;color:var(--text);resize:vertical;border-radius:8px;outline:none;margin-bottom:8px;padding:10px;font-size:14px;transition:border-color .25s}.passage-editor textarea:focus{border-color:var(--primary)}.record-card{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);margin-bottom:16px;padding:18px 20px}.record-card h4{color:var(--text);margin-bottom:12px;font-size:16px}.bulk-import{border:1px dashed var(--border-strong);border-radius:var(--radius-sm);background:var(--primary-soft);padding:20px}.bulk-header{align-items:center;gap:12px;margin-bottom:12px;display:flex}.bulk-header strong{color:var(--text);font-size:15px}.bulk-tip{color:var(--text-light);background:var(--card);border:1px solid var(--border);border-radius:10px;padding:2px 10px;font-size:12px}.format-hint{background:var(--card);border:1px solid var(--border);color:var(--text-secondary);white-space:pre-wrap;border-radius:8px;margin-bottom:12px;padding:14px 16px;font-family:SF Mono,Consolas,Monaco,monospace;font-size:13px;line-height:1.7;overflow-x:auto}.bulk-textarea{border:2px solid var(--border-strong);background:var(--card);width:100%;min-height:140px;color:var(--text);resize:vertical;border-radius:8px;outline:none;padding:12px 14px;font-family:SF Mono,Consolas,Monaco,monospace;font-size:14px;line-height:1.6;transition:border-color .25s}.bulk-textarea:focus{border-color:var(--primary)}.bulk-textarea::placeholder{color:var(--text-light)}.bulk-actions{gap:10px;margin-top:12px;display:flex}.listening-questions-scroll{width:100%;max-width:var(--max-width);margin:0 auto;padding-bottom:40px}.listening-questions-list{flex-direction:column;gap:24px;display:flex}.listening-question-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);padding:24px 28px}.listening-question-title{color:var(--text);text-align:left;align-items:flex-start;gap:12px;margin-bottom:18px;font-size:17px;line-height:1.6;display:flex}.listening-q-num{background:var(--primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;margin-top:1px;font-size:14px;font-weight:700;display:flex}.listening-options{flex-wrap:wrap;gap:12px;display:flex}.listening-pill{border:2px solid var(--border-strong);background:var(--card);cursor:pointer;color:var(--text);text-align:left;border-radius:999px;align-items:center;gap:8px;max-width:100%;padding:9px 18px;font-family:inherit;font-size:15px;transition:all .25s;display:inline-flex}.listening-pill:hover{border-color:var(--primary);background:var(--primary-soft)}.listening-pill.selected{border-color:var(--primary);background:var(--primary);color:#fff}.pill-label{background:var(--primary-light);width:24px;height:24px;color:var(--primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.listening-pill.selected .pill-label{color:#fff;background:#ffffff40}.pill-text{text-align:left;line-height:1.3}.listening-complete-wrap{justify-content:center;margin-top:32px;padding-bottom:20px;display:flex}.listening-q-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.replay-btn{background:var(--primary-light);color:var(--primary);border:1px solid var(--primary);cursor:pointer;white-space:nowrap;border-radius:16px;padding:6px 14px;font-size:13px;font-weight:600;transition:all .25s}.replay-btn:hover{background:var(--primary);color:#fff}.toast{background:var(--text);color:#fff;box-shadow:var(--shadow-lg);z-index:9999;border-radius:24px;max-width:90%;padding:12px 28px;font-size:14px;font-weight:500;animation:.3s toastIn;position:fixed;bottom:30px;left:50%;transform:translate(-50%)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}.start-page{padding-top:84px}.start-content{flex-direction:column;align-items:center;gap:28px;width:100%;max-width:560px;margin:0 auto;display:flex}.wrong-book-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);text-align:left;width:100%;max-width:560px;padding:28px 32px}.wrong-book-title{color:var(--text);text-align:center;margin-bottom:8px;font-size:20px;font-weight:700}.wrong-book-hint{color:var(--text-light);text-align:center;margin-bottom:20px;font-size:13px}.wrong-book-empty{text-align:center;color:var(--text-light);padding:24px 0;font-size:15px}.wrong-book-list{flex-direction:column;gap:18px;display:flex}.wrong-book-item{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);padding:18px}.wrong-book-q-head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:14px;display:flex}.wrong-book-q-text{color:var(--text);flex:1;font-size:16px;line-height:1.6}.wrong-count-badge{background:var(--danger);color:#fff;white-space:nowrap;border-radius:12px;flex-shrink:0;padding:3px 10px;font-size:12px;font-weight:600}.wrong-book-options{flex-direction:column;gap:10px;display:flex}.wb-option{border:2px solid var(--border-strong);cursor:pointer;background:var(--card);text-align:left;color:var(--text);border-radius:12px;align-items:center;gap:12px;padding:12px 16px;font-family:inherit;font-size:15px;transition:all .2s;display:flex}.wb-option:hover:not(:disabled){border-color:var(--primary);background:var(--primary-soft)}.wb-option:disabled{cursor:default}.wb-opt-label{background:var(--primary-light);width:28px;height:28px;color:var(--primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.wb-opt-text{line-height:1.4}.wb-option.wb-correct{border-color:var(--success);background:#22c55e1f}.wb-option.wb-correct .wb-opt-label{background:var(--success);color:#fff}.wb-option.wb-wrong{border-color:var(--danger);background:#ef44441a}.wb-option.wb-wrong .wb-opt-label{background:var(--danger);color:#fff}.wb-feedback{border-radius:8px;margin-top:12px;padding:8px 14px;font-size:14px;font-weight:600}.wb-feedback.ok{color:var(--success);background:#22c55e1f}.wb-feedback.no{color:var(--danger);background:#ef44441a}.wb-reshuffle{background:var(--primary-light);color:var(--primary);border:1px solid var(--primary);cursor:pointer;border-radius:20px;margin:24px auto 0;padding:10px 24px;font-size:14px;font-weight:600;transition:all .25s;display:block}.wb-reshuffle:hover{background:var(--primary);color:#fff}.correct-answer-row{flex-wrap:wrap;align-items:center;gap:8px;margin-top:10px;display:flex}.correct-answer-label{color:var(--text-secondary);font-size:13px;font-weight:600}.answer-pick{border:2px solid var(--border-strong);background:var(--card);width:32px;height:32px;color:var(--text-secondary);cursor:pointer;border-radius:8px;font-size:14px;font-weight:700;transition:all .2s}.answer-pick:hover{border-color:var(--success);color:var(--success)}.answer-pick.active{background:var(--success);border-color:var(--success);color:#fff}.listening-reader{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;max-width:640px;margin:0 auto;padding:24px 20px 120px;display:flex}.listening-replay{margin-bottom:28px}.listening-reader-count{color:var(--text-light);margin-bottom:24px;font-size:14px;font-weight:600}.listening-reader-text{color:var(--text);text-align:center;max-width:600px;margin-bottom:40px;font-size:22px;line-height:1.8}.listening-reader-nav{gap:14px;display:flex}.answer-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);max-width:var(--max-width);text-align:center;width:100%;padding:36px 32px}.answer-card-title{color:var(--text);margin-bottom:8px;font-size:26px;font-weight:800}.answer-card-summary{color:var(--text-secondary);margin-bottom:14px;font-size:16px;font-weight:600}.answer-card-legend{color:var(--text-light);flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;margin-bottom:24px;font-size:13px;display:flex}.answer-card-legend .dot{vertical-align:middle;border-radius:50%;width:14px;height:14px;margin-right:4px;display:inline-block}.answer-card-legend .dot.dot-correct{background:var(--success)}.answer-card-legend .dot.dot-wrong{background:var(--danger)}.answer-card-legend .dot.dot-empty{background:var(--border-strong)}.answer-card-grid{grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:12px;max-width:540px;margin:0 auto 32px;display:grid}.answer-circle{aspect-ratio:1;border:2px solid var(--border-strong);background:var(--card);color:var(--text-secondary);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;font-size:18px;font-weight:700;transition:all .2s;display:flex}.answer-circle:hover{box-shadow:var(--shadow-md);transform:scale(1.08)}.answer-circle.correct{background:var(--success);border-color:var(--success);color:#fff}.answer-circle.wrong{background:var(--danger);border-color:var(--danger);color:#fff}.answer-circle.empty{background:var(--bg);border-color:var(--border-strong);color:var(--text-light)}.answer-card-continue{margin:0 auto}.answer-card-detail{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);max-width:var(--max-width);width:100%;padding:32px}.option-item.opt-correct{border-color:var(--success);background:#22c55e1f}.option-item.opt-correct .option-label{background:var(--success);color:#fff}.option-item.opt-wrong{border-color:var(--danger);background:#ef44441a}.option-item.opt-wrong .option-label{background:var(--danger);color:#fff}.answer-explanation{background:var(--primary-soft);border:1px solid var(--primary-light);border-radius:var(--radius-sm);color:var(--text);text-align:left;margin-top:22px;padding:16px 18px;font-size:15px;line-height:1.7}.answer-explanation strong{color:var(--primary);margin-right:4px}.answer-explanation.empty{color:var(--text-light);background:var(--bg);border-color:var(--border)}.explanation-input{border:1px solid var(--border-strong);background:var(--card);width:100%;min-height:60px;color:var(--text);resize:vertical;border-radius:8px;outline:none;margin-top:8px;padding:9px 13px;font-family:inherit;font-size:14px;transition:border-color .25s}.explanation-input:focus{border-color:var(--primary)}.wb-actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:24px;display:flex}.wb-reveal-btn{background:var(--card);color:var(--primary);border:1px solid var(--primary);cursor:pointer;border-radius:20px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .25s}.wb-reveal-btn:hover{background:var(--primary);color:#fff}.wb-pw-box{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin-top:16px;display:flex}.wb-pw-box input{border:2px solid var(--border-strong);border-radius:10px;outline:none;width:160px;padding:9px 14px;font-size:15px;transition:border-color .25s}.wb-pw-box input:focus{border-color:var(--primary)}.wb-pw-submit{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:10px;padding:9px 18px;font-size:14px;font-weight:600;transition:background .25s}.wb-pw-submit:hover{background:var(--primary-dark)}.wb-pw-err{color:var(--danger);text-align:center;width:100%;font-size:13px;font-weight:600}.wb-reveal-box{margin-top:12px}.wb-explanation{background:var(--primary-soft);border:1px solid var(--primary-light);color:var(--text);text-align:left;border-radius:8px;margin-top:8px;padding:12px 14px;font-size:14px;line-height:1.7}.wb-explanation.empty{color:var(--text-light);background:var(--bg);border-color:var(--border)}.wb-entry-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-md);border:1px solid var(--border);cursor:pointer;text-align:left;align-items:center;gap:16px;width:100%;max-width:560px;padding:22px 28px;font-family:inherit;transition:all .25s;display:flex}.wb-entry-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary);transform:translateY(-2px)}.wb-entry-icon{flex-shrink:0;font-size:30px}.wb-entry-info{flex:1}.wb-entry-title{color:var(--text);align-items:center;gap:8px;font-size:18px;font-weight:700;display:flex}.wb-entry-count{background:var(--danger);color:#fff;text-align:center;border-radius:12px;min-width:22px;padding:1px 9px;font-size:12px;font-weight:700}.wb-entry-sub{color:var(--text-light);margin-top:4px;font-size:13px}.wb-entry-arrow{color:var(--text-light);flex-shrink:0;font-size:26px;line-height:1;transition:color .25s}.wb-entry-card:hover .wb-entry-arrow{color:var(--primary)}.wrong-book-page{text-align:center;background:var(--bg);flex-direction:column;justify-content:flex-start;align-items:center;width:100%;min-height:100vh;padding-top:84px;padding-bottom:60px;display:flex}.wrong-book-page .top-bar{align-items:center;gap:12px;display:flex;position:absolute;top:20px;left:24px;right:24px}.wrong-book-page .back-btn{background:var(--card);border:1px solid var(--border-strong);color:var(--text-secondary);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:20px;padding:8px 16px;font-size:14px;transition:all .25s}.wrong-book-page .back-btn:hover{color:var(--primary);border-color:var(--primary);box-shadow:var(--shadow-md)}.wrong-book-page .wb-page-title{color:var(--text);font-size:17px;font-weight:700}.wrong-book-page .user-badge{background:var(--primary-light);color:var(--primary);border-radius:20px;margin-left:auto;padding:8px 16px;font-size:14px;font-weight:600}.wrong-book-page .logout-btn{background:var(--card);border:1px solid var(--border-strong);color:var(--text-secondary);cursor:pointer;box-shadow:var(--shadow-sm);border-radius:20px;padding:8px 16px;font-size:14px;transition:all .25s}.wrong-book-page .logout-btn:hover{color:var(--danger);border-color:var(--danger);box-shadow:var(--shadow-md)}.wrong-book-content{flex-direction:column;align-items:center;gap:28px;width:100%;max-width:560px;margin:0 auto;display:flex}@media (width<=768px){.start-card{padding:40px 28px}.grammar-card{padding:28px 20px}.dictation-card{padding:36px 24px}.reading-section{flex-direction:column;max-width:100%}.reading-left{border-radius:var(--radius) var(--radius) 0 0;border-right:none;border-bottom:1px solid var(--border);max-height:40vh}.admin-content{padding:20px}.admin-panel{padding:16px}.wrong-book-card{padding:20px}.wb-entry-card{padding:18px 20px}.wrong-book-page{padding-top:76px}.listening-reader-text{font-size:18px}}