:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-card: #252525;
    --bg-hover: #2a2a2a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent: #7c5cbf;
    --accent-light: #9b7fd4;
    --accent-glow: rgba(124, 92, 191, 0.3);
    --success: #4caf7d;
    --success-glow: rgba(76, 175, 125, 0.2);
    --warning: #f0a030;
    --danger: #e74c5e;
    --border: #333;
    --radius: 12px;
    --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

#app { max-width: 640px; margin: 0 auto; padding: 0 12px 100px; }

/* Header */
header {
    position: sticky; top: 0; z-index: 100;
    background: var(--bg-primary);
    padding: 14px 0 10px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}
.header-content { display: flex; align-items: center; }
.top-title {
    font-size: 1rem; font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Dashboard */
.dashboard-header { text-align: center; margin-bottom: 20px; }
.dashboard-header h2 { font-size: 1.4rem; margin-bottom: 4px; }
.subtitle { color: var(--text-secondary); font-size: 0.85rem; }
.paper-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.paper-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; cursor: pointer;
    transition: all 0.2s; position: relative; overflow: hidden;
}
.paper-card:hover {
    background: var(--bg-hover); border-color: var(--accent);
    transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124,92,191,0.15);
}
.paper-card::before {
    content: ''; position: absolute; top: 0; left: 0;
    width: 3px; height: 100%; background: var(--accent);
    border-radius: 0 2px 2px 0;
}
.card-number { font-size: 0.75rem; color: var(--accent-light); font-weight: 700; margin-bottom: 2px; }
.card-title { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.card-meta { display: flex; flex-wrap: wrap; gap: 4px; font-size: 0.7rem; color: var(--text-muted); }
.card-meta span { background: rgba(124,92,191,0.12); padding: 2px 8px; border-radius: 10px; }

/* Step Title */
.step-title {
    font-size: 1.05rem; margin-bottom: 10px; padding-bottom: 6px;
    border-bottom: 2px solid var(--accent); display: inline-block;
}
.step-hint { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 14px; }

/* Part1 Progress Bar */
.p1-progress-bar {
    display: flex; gap: 6px; margin-bottom: 16px; overflow-x: auto;
    padding: 4px 0;
}
.p1-step {
    flex: 1; min-width: 60px; text-align: center;
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 8px 4px;
    transition: all 0.3s;
}
.p1-step.current { border-color: var(--accent); background: rgba(124,92,191,0.1); }
.p1-step.done { border-color: var(--success); background: var(--success-glow); }
.p1-step-num { font-size: 0.9rem; font-weight: 700; color: var(--text-muted); }
.p1-step.current .p1-step-num { color: var(--accent-light); }
.p1-step.done .p1-step-num { color: var(--success); }
.p1-step-label { font-size: 0.65rem; color: var(--text-muted); margin-top: 2px; }
.p1-step-score { font-size: 0.8rem; font-weight: 700; color: var(--success); margin-top: 2px; }

/* Part1 Sentence Card */
.p1-sentence-card {
    background: var(--bg-secondary); border: 1px solid var(--accent);
    border-radius: var(--radius); padding: 20px; text-align: center;
    margin-bottom: 16px;
}
.p1-sentence-num { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 8px; }
.p1-sentence-text { font-size: 1.2rem; font-weight: 600; line-height: 1.5; }

/* Part1 Result Card - 单词高亮 */
.p1-result-card {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; margin: 12px 0;
}
.p1-result-score {
    font-size: 2rem; font-weight: 800; text-align: center; margin-bottom: 12px;
}
.p1-result-score.good { color: var(--success); }
.p1-result-score.ok { color: var(--warning); }
.p1-result-score.bad { color: var(--danger); }
.p1-result-section { margin-bottom: 8px; }
.p1-result-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; }
.p1-result-words { font-size: 0.95rem; line-height: 1.8; word-break: break-word; }

.word-correct { color: #4caf7d; font-weight: 600; }
.word-missing { color: #e74c5e; font-weight: 600; text-decoration: underline; text-decoration-color: #e74c5e; }
.word-extra { color: #f0a030; font-weight: 600; }
.word-neutral { color: var(--text-secondary); }

/* Recording Controls */
.rec-controls { text-align: center; margin: 16px 0; }

.btn {
    padding: 12px 28px; border: none; border-radius: var(--radius-sm);
    font-size: 0.95rem; font-weight: 600; cursor: pointer;
    transition: all 0.2s ease; display: inline-block;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff; box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
    background: var(--bg-secondary); color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); border-color: var(--accent); }

.btn-record {
    background: linear-gradient(135deg, #7c3aed, #5b21b6);
    color: #fff; font-size: 1.05rem; padding: 14px 40px;
    border-radius: 50px; box-shadow: 0 4px 16px rgba(124,92,191,0.3);
    transition: all 0.3s;
}
.btn-record:hover { box-shadow: 0 6px 24px rgba(124,92,191,0.4); }
.btn-record.recording {
    background: linear-gradient(135deg, var(--danger), #c0392b);
    animation: recPulse 1.5s ease infinite;
}
@keyframes recPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(231,76,94,0.4); }
    50% { box-shadow: 0 0 0 12px rgba(231,76,94,0); }
}

/* Timer bar for recording */
.rec-timer-bar {
    width: 100%; height: 4px; background: var(--bg-secondary);
    border-radius: 2px; margin: 12px 0 6px; overflow: hidden;
}
.rec-timer-fill {
    height: 100%; width: 100%;
    background: linear-gradient(90deg, var(--danger), var(--accent));
    animation: timerShrink 10s linear forwards;
}
@keyframes timerShrink { from { width: 100%; } to { width: 0%; } }
.rec-timer-text { text-align: center; font-size: 0.8rem; color: var(--text-muted); }

/* Recording status */
.rec-status {
    text-align: center; padding: 10px; border-radius: var(--radius-sm);
    margin: 8px 0; font-size: 0.85rem;
}
.rec-status.processing { background: rgba(124,92,191,0.12); color: var(--accent-light); border: 1px solid var(--accent); }
.rec-status.error { background: rgba(231,76,94,0.12); color: var(--danger); border: 1px solid var(--danger); }

/* Step actions */
.step-actions { text-align: center; margin-top: 16px; }

/* Sentence list (review) */
.sentence-list { margin-bottom: 16px; }
.sentence-item {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 6px;
}
.sentence-item.answered { border-left: 3px solid var(--success); }
.sentence-header { display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; }
.sentence-rec { font-size: 0.8rem; color: var(--text-muted); padding-top: 6px; border-top: 1px solid var(--border); margin-top: 6px; }
.inline-score { font-weight: 700; font-size: 0.9rem; }
.inline-score.good { color: var(--success); }
.inline-score.ok { color: var(--warning); }
.inline-score.bad { color: var(--danger); }

/* Q&A */
.qa-list { margin-bottom: 16px; }
.qa-item.with-hint { padding-bottom: 8px; }
.answer-hints {
    margin-top: 8px; padding: 8px 10px;
    background: rgba(124,92,191,0.06); border-radius: var(--radius-sm);
}
.hint-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; }
.hint-answer {
    font-size: 0.85rem; color: var(--text-secondary); padding: 2px 0;
    border-left: 2px solid var(--accent); padding-left: 8px; margin-bottom: 2px;
}

.qa-item {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px; margin-bottom: 10px;
}
.qa-item.answered { border-color: var(--accent); }
.question { font-size: 0.95rem; font-weight: 500; margin-bottom: 8px; }
.q-num {
    background: var(--accent); color: #fff; width: 24px; height: 24px;
    border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
    font-size: 0.7rem; font-weight: 700; margin-right: 6px;
}
.answers { margin-top: 8px; }
.answer {
    background: var(--success-glow); border-left: 2px solid var(--success);
    padding: 6px 10px; margin-bottom: 4px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 0.85rem; color: var(--text-secondary);
}

/* Passage */
.passage-box {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; line-height: 1.8;
    font-size: 0.9rem; margin-bottom: 14px;
}
.passage-small { max-height: 150px; overflow-y: auto; font-size: 0.85rem; }
.passage-small::-webkit-scrollbar { width: 4px; }
.passage-small::-webkit-scrollbar-track { background: var(--bg-primary); }
.passage-small::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.p3-questions-preview {
    background: rgba(124,92,191,0.08); border: 1px solid var(--accent);
    border-radius: var(--radius); padding: 12px; margin-bottom: 14px;
}
.preview-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; }
.preview-q { padding: 4px 0; font-size: 0.85rem; color: var(--text-secondary); }

/* Score Summary */
.score-summary {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; margin-bottom: 14px;
}
.score-detail { display: flex; flex-direction: column; gap: 8px; }
.score-line { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; }
.score-line span:first-child { width: 65px; flex-shrink: 0; color: var(--text-secondary); }
.score-bar-wrap { flex: 1; height: 8px; background: var(--bg-primary); border-radius: 4px; overflow: hidden; }
.score-bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-light)); border-radius: 4px; transition: width 1s ease; min-width: 2px; }
.score-num { width: 38px; text-align: right; font-weight: 600; color: var(--accent-light); flex-shrink: 0; }

/* Result Box */
.rec-result-box {
    background: rgba(124,92,191,0.08); border: 1px solid var(--accent);
    border-radius: var(--radius); padding: 12px; margin-bottom: 12px;
}
.rec-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 4px; }
.rec-text { font-size: 0.9rem; line-height: 1.5; color: var(--text-primary); word-break: break-all; }

.answers-box { margin: 12px 0; }
.answers-box h4 { font-size: 0.9rem; margin-bottom: 8px; color: var(--text-secondary); }

/* Result Page */
.result-page { text-align: center; padding: 24px 0; }
.result-icon { font-size: 3.5rem; margin-bottom: 12px; }
.result-page h3 { font-size: 1.3rem; margin-bottom: 20px; }
.result-scores {
    background: var(--bg-secondary); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px; margin-bottom: 20px; text-align: left;
}
.score-item {
    display: flex; justify-content: space-between; padding: 8px 0;
    border-bottom: 1px solid var(--border); font-size: 0.9rem; color: var(--text-secondary);
}
.score-item:last-child { border-bottom: none; }
.score-total {
    display: flex; justify-content: space-between; padding: 10px 0 0;
    font-size: 1.05rem; font-weight: 700; color: var(--accent-light);
    border-top: 2px solid var(--border); margin-top: 4px;
}
.result-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* Error */
.error-msg { text-align: center; padding: 40px; color: var(--danger); font-size: 1rem; }

/* Responsive */
@media (max-width: 480px) {
    .paper-grid { grid-template-columns: 1fr; }
    #app { padding: 0 10px 80px; }
}