:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface-2: #232733;
    --border: #2e3345;
    --text: #e4e6f0;
    --text-muted: #8b8fa3;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.15);
    --success: #00b894;
    --warning: #fdcb6e;
    --radius: 16px;
    --radius-sm: 10px;
}

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

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

/* --- HEADER --- */
.header {
    background: linear-gradient(135deg, var(--accent) 0%, #4834d4 100%);
    padding: 3rem 2rem 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.05) 0%, transparent 50%);
    animation: shimmer 8s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { transform: translateX(-10%) rotate(0deg); }
    50% { transform: translateX(10%) rotate(2deg); }
}

.header-content {
    position: relative; z-index: 1;
    max-width: 700px; margin: 0 auto;
}

.badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 0.35rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    color: rgba(255,255,255,0.9);
}

.header h1 {
    font-size: 2rem; font-weight: 700;
    color: #fff; margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.header p { color: rgba(255,255,255,0.75); font-size: 1.05rem; }

/* --- MAIN --- */
.main {
    max-width: 900px;
    margin: -2rem auto 3rem;
    padding: 0 1.5rem;
    position: relative; z-index: 2;
}

/* --- PLAYER CARD --- */
.player-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.player-label {
    display: flex; align-items: center; gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.player-icon {
    width: 44px; height: 44px;
    background: var(--accent-glow);
    border: 1px solid rgba(108, 92, 231, 0.3);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
}

.player-label h2 { font-size: 1.1rem; font-weight: 600; }
.player-label span { font-size: 0.8rem; color: var(--text-muted); }

.version-select {
    margin-left: auto;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--accent-light);
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    text-align: center;
    min-width: 48px;
}
.version-select:hover, .version-select:focus {
    border-color: var(--accent);
    color: var(--text);
}

.audio-wrapper {
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
}

.audio-controls { display: flex; align-items: center; gap: 1rem; }

.play-btn {
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--accent);
    border: none; color: #fff;
    font-size: 1.2rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; transition: all 0.2s;
}
.play-btn:hover { background: var(--accent-light); transform: scale(1.05); }
.play-btn:active { transform: scale(0.97); }

.progress-area { flex: 1; display: flex; flex-direction: column; gap: 0.4rem; }

.progress-bar-container {
    width: 100%; height: 6px;
    background: var(--border);
    border-radius: 3px;
    cursor: pointer;
    position: relative; overflow: hidden;
}
.progress-bar-container:hover { height: 8px; }

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 3px;
    width: 0%; transition: width 0.1s linear;
}

.time-display {
    display: flex; justify-content: space-between;
    font-size: 0.75rem; color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.speed-btn {
    background: var(--surface); border: 1px solid var(--border);
    color: var(--text-muted); padding: 0.3rem 0.6rem;
    border-radius: 6px; font-size: 0.75rem;
    cursor: pointer; font-weight: 600; transition: all 0.2s;
}
.speed-btn:hover { color: var(--accent-light); border-color: var(--accent); }

.volume-control { display: flex; align-items: center; gap: 0.5rem; }

.volume-icon {
    cursor: pointer; font-size: 1.1rem;
    color: var(--text-muted); transition: color 0.2s;
}
.volume-icon:hover { color: var(--text); }

.volume-slider {
    width: 80px; -webkit-appearance: none; appearance: none;
    height: 4px; background: var(--border);
    border-radius: 2px; outline: none;
}
.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; height: 14px; border-radius: 50%;
    background: var(--accent); cursor: pointer;
}

.no-audio-msg {
    text-align: center; padding: 1rem;
    color: var(--text-muted); font-size: 0.9rem;
}
.no-audio-msg code {
    background: var(--surface); padding: 0.2rem 0.5rem;
    border-radius: 4px; font-size: 0.85rem; color: var(--accent-light);
}

.version-desc {
    font-size: 0.75rem; color: var(--text-muted);
    text-align: center; margin-top: 0.75rem;
    line-height: 1.5;
    padding: 0.5rem 0.75rem;
    background: var(--surface-2);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.shortcut-hint {
    font-size: 0.75rem; color: var(--text-muted);
    text-align: center; margin-top: 0.5rem;
}
kbd {
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 4px; padding: 0.1rem 0.35rem;
    font-size: 0.7rem; font-family: inherit;
}

/* --- DOCUMENTS GRID --- */
.docs-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 1rem; margin-bottom: 1.5rem;
}
@media (max-width: 640px) {
    .docs-grid { grid-template-columns: 1fr; }
    .shortcut-hint { display: none; }
}

.doc-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem; cursor: pointer;
    transition: all 0.25s;
    text-decoration: none; color: inherit;
}
.doc-card:hover {
    border-color: var(--accent); background: var(--surface-2);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.doc-card-icon {
    width: 40px; height: 40px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; margin-bottom: 0.75rem;
}
.doc-card-icon.script {
    background: rgba(0, 184, 148, 0.12);
    border: 1px solid rgba(0, 184, 148, 0.25);
}
.doc-card-icon.guide {
    background: rgba(253, 203, 110, 0.12);
    border: 1px solid rgba(253, 203, 110, 0.25);
}

.doc-card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.35rem; }
.doc-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

/* --- MODAL --- */
.modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 100;
    justify-content: center; align-items: flex-start;
    padding: 2rem; overflow-y: auto;
}
.modal-overlay.active { display: flex; }

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 850px; width: 100%; max-height: 85vh;
    display: flex; flex-direction: column;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    margin-top: 2rem;
}

.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.modal-header h2 { font-size: 1.1rem; font-weight: 600; }

.modal-close {
    width: 36px; height: 36px; border-radius: 8px;
    background: var(--surface-2); border: 1px solid var(--border);
    color: var(--text-muted); font-size: 1.1rem;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
}
.modal-close:hover { color: var(--text); border-color: var(--accent); }

.modal-body { padding: 1.5rem; overflow-y: auto; flex: 1; }

.modal-loading {
    text-align: center; padding: 3rem;
    color: var(--text-muted);
}
.modal-loading .spinner {
    display: inline-block; width: 24px; height: 24px;
    border: 3px solid var(--border); border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-bottom: 0.75rem;
}
@keyframes spin { to { transform: rotate(360deg); } }

.modal-error {
    text-align: center; padding: 2rem;
    color: #e17055;
}

/* --- MARKDOWN RENDERING --- */
.md-content h1 {
    font-size: 1.5rem; font-weight: 700;
    margin-bottom: 1rem; color: var(--accent-light);
    padding-bottom: 0.75rem; border-bottom: 1px solid var(--border);
}
.md-content h2 {
    font-size: 1.2rem; font-weight: 600;
    margin-top: 2rem; margin-bottom: 0.75rem;
    color: var(--accent-light);
}
.md-content h3 {
    font-size: 1.05rem; font-weight: 600;
    margin-top: 1.5rem; margin-bottom: 0.5rem;
    color: var(--text);
}
.md-content p { margin-bottom: 0.75rem; color: var(--text); line-height: 1.7; }
.md-content ul, .md-content ol { margin-bottom: 0.75rem; padding-left: 1.5rem; }
.md-content li { margin-bottom: 0.35rem; line-height: 1.6; }
.md-content strong { color: #fff; font-weight: 600; }
.md-content code {
    background: var(--surface-2); padding: 0.15rem 0.45rem;
    border-radius: 4px; font-size: 0.85em; color: var(--accent-light);
}
.md-content pre {
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: var(--radius-sm); padding: 1rem;
    overflow-x: auto; margin-bottom: 1rem;
}
.md-content pre code { background: none; padding: 0; font-size: 0.85rem; }
.md-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem; margin: 1rem 0; color: var(--text-muted);
}
.md-content table {
    width: 100%; border-collapse: collapse;
    margin: 1rem 0; font-size: 0.9rem;
}
.md-content thead th {
    background: var(--surface-2); padding: 0.6rem 0.75rem;
    text-align: left; font-weight: 600;
    border-bottom: 2px solid var(--border);
    color: var(--accent-light); font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.03em;
}
.md-content tbody td {
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--border);
}
.md-content tbody tr:hover { background: var(--accent-glow); }
.md-content hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
.md-content input[type="checkbox"] { margin-right: 0.4rem; accent-color: var(--accent); }

/* --- FOOTER --- */
.footer {
    text-align: center; padding: 2rem;
    color: var(--text-muted); font-size: 0.8rem;
}
.footer a { color: var(--accent-light); text-decoration: none; }
.footer a:hover { text-decoration: underline; }