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.88));--exam-border: var(--t-border, rgba(28, 36, 48, .1));--exam-ink: var(--t-ink, #1c2430);--exam-muted: var(--t-ink-muted, #8b929c);--exam-answered: var(--t-accent, #c95a2d);--exam-unanswered: rgba(28, 36, 48, .08);--exam-flagged: var(--t-warning, #b87514);--exam-current: var(--t-accent, #c95a2d);--exam-timer-bg: rgba(0, 0, 0, .6);--exam-timer-text: #ffffff;--exam-timer-warn: var(--t-danger, #8f2430);--exam-topbar-h: 48px;--exam-bottombar-h: 56px}.exam-root{position:fixed;top:0;left:0;width:100vw;height:100vh;height:100dvh;display:flex;flex-direction:column;background:var(--exam-bg);font-family:var(--t-font);font-size:16px;color:var(--exam-ink);z-index:2000;overflow:hidden}.exam-topbar{height:var(--exam-topbar-h);background:var(--exam-topbar);color:var(--exam-topbar-text);display:flex;align-items:center;justify-content:space-between;padding:0 20px;flex-shrink:0;-webkit-user-select:none;-moz-user-select:none;user-select:none;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.04)}.exam-topbar__section{font-size:16px;font-weight:700;letter-spacing:.3px}.exam-topbar__center{display:flex;align-items:center;gap:16px}.exam-topbar__timer{background:var(--exam-timer-bg);color:var(--exam-timer-text);padding:4px 14px;border-radius:8px;font-size:17px;font-weight:700;font-variant-numeric:tabular-nums;min-width:80px;text-align:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.exam-topbar__timer--warning{background:var(--exam-timer-warn);animation:exam-timer-flash 1s ease-in-out infinite}@keyframes exam-timer-flash{0%,to{opacity:1}50%{opacity:.4}}.exam-topbar__progress{font-size:14px;opacity:.7}.exam-topbar__btn{background:#ffffff14;border:1px solid rgba(255,255,255,.12);color:#ffffffd9;padding:4px 14px;border-radius:8px;font-size:13px;cursor:pointer;transition:background .15s}.exam-content{flex:1;overflow:hidden;display:flex;min-height:0}.exam-content--single>.exam-panel{flex:1;overflow-y:auto;padding:24px 32px}.exam-content--split{flex-direction:row}.exam-split__left,.exam-split__right{overflow-y:auto;padding:24px}.exam-split__left{background:var(--exam-surface);border-right:1px solid var(--exam-border)}.exam-split__right{background:var(--exam-bg)}.exam-split__divider{width:5px;background:#1c24300f;cursor:col-resize;flex-shrink:0;transition:background .12s}.exam-split__divider:hover,.exam-split__divider--dragging{background:var(--exam-answered)}.exam-passage{font-size:16px;line-height:1.7;color:var(--exam-ink)}.exam-passage p{margin:0 0 16px}.exam-passage .highlight-yellow{background:#ffc83240;border-radius:3px;padding:1px 2px}.exam-bottombar{height:var(--exam-bottombar-h);background:var(--exam-surface);border-top:1px solid var(--exam-border);display:flex;align-items:center;padding:0 16px;gap:8px;flex-shrink:0;-webkit-user-select:none;-moz-user-select:none;user-select:none;box-shadow:0 -2px 12px #1c24300a}.exam-bottombar__nav{display:flex;align-items:center;gap:4px;flex:1;overflow-x:auto;padding:4px 0}.exam-nav-btn{width:34px;height:34px;border:1px solid var(--exam-border);border-radius:8px;background:var(--exam-unanswered);color:var(--exam-ink);font-size:13px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .12s;position:relative}.exam-nav-btn--answered{background:var(--exam-answered);color:#fff;border-color:var(--exam-answered)}.exam-nav-btn--current{border:2px solid var(--exam-current);box-shadow:0 0 0 2px #c95a2d33}.exam-nav-btn--flagged:after{content:"";position:absolute;top:-3px;right:-3px;width:10px;height:10px;background:var(--exam-flagged);border-radius:50%;border:1px solid white}.exam-bottombar__controls{display:flex;align-items:center;gap:6px;flex-shrink:0}.exam-btn{padding:8px 18px;border:1px solid var(--exam-border);border-radius:8px;background:var(--exam-surface);color:var(--exam-ink);font-size:14px;font-weight:600;cursor:pointer;transition:all .12s}.exam-btn--primary{background:var(--exam-answered);color:#fff;border-color:var(--exam-answered)}.exam-btn--flag{background:transparent;border-color:var(--exam-flagged);color:var(--exam-flagged)}.exam-btn--flag.active{background:var(--exam-flagged);color:#fff}.exam-transition{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#1c2024eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:3000;color:#fff}.exam-transition__card{max-width:520px;text-align:center;padding:48px}.exam-transition__title{font-size:32px;font-weight:700;margin-bottom:16px}.exam-transition__subtitle{font-size:17px;opacity:.65;margin-bottom:28px}.exam-transition__instructions{font-size:16px;line-height:1.7;margin-bottom:32px;text-align:left;opacity:.8}.exam-transition__btn{padding:14px 48px;background:var(--t-accent);color:#fff;border:none;border-radius:var(--t-r-pill);font-size:17px;font-weight:700;cursor:pointer;transition:all .12s;box-shadow:0 4px 16px #c95a2d4d}.exam-report{max-width:680px;margin:40px auto;padding:40px;background:var(--t-surface-strong);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.22);border-radius:var(--t-r-xl);box-shadow:var(--t-shadow-xl)}.exam-report__title{font-size:24px;font-weight:700;margin-bottom:8px;color:var(--t-ink)}.exam-report__score{font-size:56px;font-weight:800;color:var(--t-accent);text-align:center;margin:24px 0}.exam-report__sections{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:24px 0}.exam-report__section-card{padding:16px;background:#1c243008;border-radius:var(--t-r-md);text-align:center}.exam-report__section-name{font-size:12px;font-weight:600;color:var(--exam-muted);margin-bottom:8px}.exam-report__section-score{font-size:28px;font-weight:800;color:var(--t-accent)}.audio-player{display:flex;align-items:center;gap:12px;padding:12px 20px;background:var(--t-surface-strong);border:1px solid var(--t-border);border-radius:var(--t-r-lg);box-shadow:var(--t-shadow-sm);margin-bottom:20px}.audio-player-locked{opacity:.6}.audio-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border:none;background:var(--t-accent-soft);color:var(--t-accent-deep);border-radius:50%;cursor:pointer;font-size:16px}.audio-seek{flex:1;accent-color:var(--t-accent);height:4px;cursor:pointer}.audio-time{font-size:13px;font-variant-numeric:tabular-nums;color:var(--t-ink-secondary)}.audio-speed{padding:4px 8px;border:1px solid var(--t-border);border-radius:6px;font-size:11px;font-weight:700;background:var(--t-bg-subtle);cursor:pointer}.audio-count{font-size:12px;font-weight:600;color:var(--t-accent)}.audio-error{margin-left:10px;padding:6px 10px;border-radius:10px;border:1px solid rgba(143,36,48,.18);background:#8f24300f;color:var(--t-danger);font-size:12px;line-height:1.35;max-width:min(520px,55vw)}.diff-display{line-height:1.8;font-size:15px;padding:16px;background:var(--t-surface-elevated);border-radius:var(--t-r-md);border:1px solid var(--t-border-light)}.diff-correct{color:var(--t-ink)}.diff-missing{color:var(--t-danger);text-decoration:line-through;opacity:.7}.diff-extra{color:var(--t-accent);font-weight:600;text-decoration:underline}.form-textarea{width:100%;padding:16px;border-radius:var(--t-r-md);border:1px solid var(--t-border);background:var(--t-surface-strong);font-family:inherit;font-size:16px;line-height:1.6;resize:vertical;transition:border-color .2s}.form-textarea:focus{outline:none;border-color:var(--t-accent);box-shadow:0 0 0 3px var(--t-accent-soft)}.exam-writing__editor{display:flex;flex-direction:column;height:100%;border:1px solid var(--t-border);border-radius:var(--t-r-md);overflow:hidden;background:#fff}.exam-writing__textarea{flex:1;padding:20px;border:none;font-size:16px;line-height:1.6;font-family:var(--t-font);resize:none;background:transparent}.exam-writing__textarea:focus{outline:none}.exam-writing__footer{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:var(--t-bg-subtle);border-top:1px solid var(--t-border-light);font-size:13px;font-weight:500}.exam-writing__wordcount--low{color:var(--t-danger);font-weight:700}.word-pool{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px dashed var(--t-border)}.inline-input,.inline-select{display:inline-block;width:120px;padding:4px 10px;margin:0 4px;border-radius:var(--t-r-sm);border:1px solid var(--t-border);background:var(--t-surface-strong);font-size:15px;color:var(--t-accent-deep);font-weight:500;transition:border-color .2s}.inline-input:focus,.inline-select:focus{outline:none;border-color:var(--t-accent);box-shadow:0 0 0 2px var(--t-accent-soft)}