/* Chord Lab — DRMA */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0f1115;
    --surface: #16181f;
    --surface-2: #1e2028;
    --border: #2a2c35;
    --text: #f4f1ec;
    --text-dim: #9a9aaa;
    --gold: #e6b65c;
    --gold-dark: #c49530;
    --gold-glow: #e6b65c30;
    --teal: #24a8a2;
    --orange: #ee612e;
    --blue: #57a2d8;
    --red: #ff6b6b;
    --green: #4ecdc4;
    --radius: 12px;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { font-size: 28px; color: var(--gold); }
.brand h1 { font-size: 20px; font-weight: 700; letter-spacing: -0.5px; }
.subtitle { font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

.icon-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 16px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.icon-btn:hover { border-color: var(--red); color: var(--red); }

main {
    max-width: 700px;
    margin: 0 auto;
    padding: 20px;
}

.section-label {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    margin-top: 20px;
}

/* Controls */
.controls-bar {
    display: flex;
    gap: 16px;
    align-items: flex-end;
    flex-wrap: wrap;
}

.control-group label {
    display: block;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.control-group select {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

.bpm-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bpm-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.bpm-btn:hover { border-color: var(--gold); color: var(--gold); }

#bpm-display {
    font-size: 18px;
    font-weight: 700;
    color: var(--gold);
    min-width: 36px;
    text-align: center;
}

/* Chord Palette */
.chord-palette {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
}

.palette-chord {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.palette-chord:hover {
    border-color: var(--gold);
    box-shadow: 0 0 15px var(--gold-glow);
    transform: translateY(-2px);
}

.palette-chord:active { transform: scale(0.95); }

.palette-chord .chord-numeral {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    display: block;
}

.palette-chord .chord-name {
    font-size: 11px;
    color: var(--text-dim);
    margin-top: 2px;
}

.palette-chord.minor { border-color: var(--border); }
.palette-chord.minor .chord-numeral { color: var(--text-dim); }
.palette-chord.dim { border-color: var(--border); opacity: 0.7; }

/* Progression Timeline */
.progression-timeline {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    min-height: 80px;
    background: var(--surface);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 12px;
    align-items: center;
}

.empty-state {
    width: 100%;
    text-align: center;
    color: var(--text-dim);
    font-size: 14px;
    padding: 16px;
}

.timeline-chord {
    background: var(--surface-2);
    border: 2px solid var(--gold);
    border-radius: 10px;
    padding: 10px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    min-width: 64px;
}

.timeline-chord.playing {
    background: var(--gold-glow);
    box-shadow: 0 0 20px var(--gold-glow);
    transform: scale(1.08);
}

.timeline-chord .chord-numeral {
    font-size: 16px;
    font-weight: 700;
}

.timeline-chord .chord-name {
    font-size: 10px;
    color: var(--text-dim);
}

.timeline-chord .remove-chord {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--red);
    color: var(--bg);
    font-size: 11px;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.timeline-chord:hover .remove-chord { display: flex; }

/* Playback */
.playback-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.play-button {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    border: none;
    color: var(--bg);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    transition: all 0.2s;
    box-shadow: 0 4px 20px var(--gold-glow);
}

.play-button:hover { transform: scale(1.05); }
.play-button:active { transform: scale(0.95); }

.play-icon { font-size: 28px; }
#play-text { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }

.play-button.playing {
    background: linear-gradient(135deg, var(--red), #cc4444);
}

.loop-button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--text-dim);
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loop-button.active {
    border-color: var(--teal);
    color: var(--teal);
    background: rgba(36, 168, 162, 0.1);
}

/* Presets */
.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
    margin-bottom: 24px;
}

.preset-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    cursor: pointer;
    transition: all 0.2s;
}

.preset-card:hover {
    border-color: var(--gold);
    box-shadow: 0 0 15px var(--gold-glow);
}

.preset-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.preset-chords {
    font-size: 12px;
    color: var(--text-dim);
}

footer {
    text-align: center;
    padding: 16px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
    main { padding: 12px; }
    .chord-palette { grid-template-columns: repeat(4, 1fr); }
    .play-button { width: 80px; height: 80px; }
    .play-icon { font-size: 22px; }
}