/* ═══════════════════════════════════════════════════════════════════════════
   DAW MOCKUP — "obsidian console" theme. Self-contained (does not depend on or
   disturb the main styles.css). Direction: studio-hardware channel strips on a
   near-black desk — hairline borders, amber transport LEDs, per-track channel
   colors, silkscreen-style labels, mono numeric readouts.
   Class names consumed by daw.js / track-*.js (on, playhead, seq-playing,
   chord-playing, selected, filled, rest, dragging, drag-over-*, collapsed,
   hidden, active, armed, is-playing) must keep working.
   ═══════════════════════════════════════════════════════════════════════════ */

#songBuilder button { font-family: inherit; }
#songBuilder :focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* ── Toolbar (brand + transport + tempo + add) ───────────────────────────── */
#songBuilder .daw-toolbar {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 12px 22px;
    padding: 12px 24px;
    background: rgba(13, 14, 19, 0.82);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 32px -18px rgba(0, 0, 0, 0.8);
}

#songBuilder .transport-label {
    font-family: var(--font-label); font-size: 10px; font-weight: 600;
    letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint);
}

#songBuilder .transport-group { display: flex; align-items: center; gap: 8px; }
#songBuilder .daw-btn {
    display: inline-flex; align-items: center; gap: 8px;
    height: 38px; padding: 0 16px;
    background: var(--bg-control); color: var(--text);
    border: 1px solid var(--hairline); border-radius: 9px;
    font: 600 13px var(--font-ui);
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: background 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 100ms ease;
}
#songBuilder .daw-btn svg { width: 15px; height: 15px; flex: none; }
#songBuilder .daw-btn:hover { border-color: var(--hairline-strong); background: #212634; }
#songBuilder .daw-btn:active { transform: scale(0.97); }
#songBuilder .daw-btn.primary {
    background: linear-gradient(180deg, #ffc24d, #f5a30c);
    border-color: rgba(255, 178, 36, 0.6);
    color: #231503;
    box-shadow: 0 2px 14px -2px var(--amber-glow), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
#songBuilder .daw-btn.primary:hover { background: linear-gradient(180deg, #ffd075, #ffb224); }

#songBuilder .toolbar-spacer { flex: 1; }

#songBuilder .add-group { display: flex; align-items: center; gap: 8px; }
#songBuilder .add-btn {
    display: inline-flex; align-items: center; gap: 8px;
    height: 34px; padding: 0 14px;
    background: transparent; color: var(--text);
    border: 1px solid var(--hairline); border-radius: 9px;
    font: 600 12.5px var(--font-ui);
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease, transform 100ms ease;
}
#songBuilder .add-btn::before {
    content: '';
    width: 7px; height: 7px; border-radius: 2px; flex: none;
    background: var(--dot, var(--amber));
    box-shadow: 0 0 8px -1px var(--dot, var(--amber));
}
#songBuilder .add-btn[data-add=drums] { --dot: var(--ch-drums); }
#songBuilder .add-btn[data-add=seq] { --dot: var(--ch-seq); }
#songBuilder .add-btn[data-add=chords] { --dot: var(--ch-chords); }
#songBuilder .add-btn:hover { border-color: var(--dot); background: color-mix(in srgb, var(--dot) 10%, transparent); }
#songBuilder .add-btn:active { transform: scale(0.97); }

/* fader cap for channel volume — base range chrome now lives in styles.css */
#songBuilder .vol-slider::-webkit-slider-thumb {
    width: 9px; height: 18px; margin-top: -7px; border-radius: 3px;
    background: linear-gradient(90deg,
        color-mix(in srgb, var(--thumb) 82%, black),
        var(--thumb) 45%,
        color-mix(in srgb, var(--thumb) 82%, black));
}
#songBuilder .vol-slider::-moz-range-thumb {
    width: 9px; height: 18px; border-radius: 3px;
    background: linear-gradient(90deg,
        color-mix(in srgb, var(--thumb) 82%, black),
        var(--thumb) 45%,
        color-mix(in srgb, var(--thumb) 82%, black));
}
/* ── Track list ──────────────────────────────────────────────────────────── */
#songBuilder .track-list {
    display: flex; flex-direction: column; gap: 16px;
    max-width: 1280px; margin: 0 auto;
    padding: 22px 24px 0;
}

#songBuilder .empty-state {
    max-width: 520px; margin: 56px auto; padding: 48px 36px;
    text-align: center; color: var(--muted);
    border: 1px dashed var(--hairline-strong); border-radius: var(--radius-lg);
    background: radial-gradient(420px 200px at 50% 0%, rgba(255, 178, 36, 0.05), transparent 70%);
}
#songBuilder .empty-state.hidden { display: none; }
#songBuilder .empty-glyph { width: 44px; height: 44px; color: var(--faint); margin-bottom: 14px; }
#songBuilder .empty-state h2 {
    margin: 0 0 8px;
    font-family: var(--font-label); font-size: 15px; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase; color: var(--text);
}
#songBuilder .empty-state p { margin: 0 0 22px; font-size: 13.5px; line-height: 1.6; }
#songBuilder .empty-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }

/* ── Track panel (channel strip) ─────────────────────────────────────────── */
#songBuilder .track {
    position: relative;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 56px) var(--bg-raised);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 14px 30px -18px rgba(0, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: box-shadow 200ms ease, opacity 150ms ease, border-color 200ms ease;
}
#songBuilder .track::before {  /* channel color rail */
    content: '';
    position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
    background: var(--track-accent);
    opacity: 0.9;
}
#songBuilder .track[data-type=drums] { --track-accent: var(--ch-drums); }
#songBuilder .track[data-type=seq] { --track-accent: var(--ch-seq); }
#songBuilder .track[data-type=chords] { --track-accent: var(--ch-chords); }

#songBuilder .track.is-playing {
    border-color: color-mix(in srgb, var(--track-accent) 40%, transparent);
    box-shadow:
        0 0 0 1px color-mix(in srgb, var(--track-accent) 22%, transparent),
        0 14px 34px -16px color-mix(in srgb, var(--track-accent) 30%, rgba(0, 0, 0, 0.7));
}
#songBuilder .track.dragging { opacity: 0.45; }
#songBuilder .track.drag-over-top { box-shadow: 0 -3px 0 var(--amber); }
#songBuilder .track.drag-over-bottom { box-shadow: 0 3px 0 var(--amber); }

#songBuilder .track-head {
    display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
    padding: 10px 14px 10px 16px;
    background: rgba(255, 255, 255, 0.015);
    border-bottom: 1px solid var(--hairline);
}
#songBuilder .drag-handle {
    display: grid; place-items: center;
    width: 22px; height: 28px;
    color: var(--faint); cursor: grab; user-select: none;
}
#songBuilder .drag-handle:hover { color: var(--muted); }
#songBuilder .drag-handle:active { cursor: grabbing; }
#songBuilder .drag-handle svg { width: 13px; height: 13px; }

#songBuilder .track-badge {
    font-family: var(--font-label); font-size: 10px; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--track-accent);
    background: color-mix(in srgb, var(--track-accent) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--track-accent) 35%, transparent);
    padding: 4px 9px; border-radius: 6px;
}
#songBuilder .track-title { font-size: 13.5px; font-weight: 600; letter-spacing: 0.01em; }
#songBuilder .track-head .spacer { flex: 1; }

/* mixer cluster */
#songBuilder .mixer { display: flex; align-items: center; gap: 8px; padding-left: 4px; }
#songBuilder .mixer .vol-slider { width: 120px; }
#songBuilder .mixer .vol-readout {
    min-width: 38px; text-align: right;
    font-family: var(--font-mono); font-size: 11px;
    font-variant-numeric: tabular-nums; color: var(--muted);
}

#songBuilder .mini-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 30px; height: 30px;
    background: var(--bg-control); color: var(--muted);
    border: 1px solid var(--hairline); border-radius: 8px;
    font: 700 11px var(--font-label);
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: color 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 150ms ease, transform 100ms ease;
}
#songBuilder .mini-btn svg { width: 13px; height: 13px; }
#songBuilder .mini-btn:hover { color: var(--text); border-color: var(--hairline-strong); }
#songBuilder .mini-btn:active { transform: scale(0.94); }
#songBuilder .mini-btn:disabled { opacity: 0.3; cursor: default; pointer-events: none; }
#songBuilder .mini-btn.play.active {
    color: var(--green); border-color: var(--green);
    background: color-mix(in srgb, var(--green) 16%, var(--bg-control));
    box-shadow: 0 0 12px -3px rgba(61, 220, 132, 0.55);
}
#songBuilder .mini-btn.mute.active {
    color: var(--red); border-color: var(--red);
    background: color-mix(in srgb, var(--red) 16%, var(--bg-control));
    box-shadow: 0 0 12px -3px rgba(255, 82, 82, 0.5);
}
#songBuilder .mini-btn.solo.active {
    color: var(--amber); border-color: var(--amber);
    background: color-mix(in srgb, var(--amber) 16%, var(--bg-control));
    box-shadow: 0 0 12px -3px var(--amber-glow);
}
#songBuilder .mini-btn.remove:hover { color: var(--red); border-color: var(--red); background: rgba(255, 82, 82, 0.1); }

#songBuilder .track-body { padding: 14px 16px 16px; }
#songBuilder .track.collapsed .track-body { display: none; }

/* ── Shared per-track controls (silkscreen label above each control) ─────── */
#songBuilder .track-controls {
    display: flex; flex-wrap: wrap; align-items: flex-end;
    gap: 10px 16px; margin-bottom: 14px;
}
#songBuilder .track-controls label {
    display: flex; flex-direction: column; align-items: flex-start; gap: 5px;
    font-family: var(--font-label); font-size: 9.5px; font-weight: 600;
    letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint);
}
#songBuilder .track-controls select, #songBuilder .track-controls input[type=number] {
    appearance: none; -webkit-appearance: none;
    height: 30px; padding: 0 26px 0 10px;
    background: var(--bg-control) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='m1 1 4 4 4-4' stroke='%238b93a6' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 9px center;
    color: var(--text);
    border: 1px solid var(--hairline); border-radius: var(--radius-sm);
    font: 500 12.5px var(--font-ui);
    letter-spacing: normal; text-transform: none;
    cursor: pointer;
    transition: border-color 150ms ease;
}
#songBuilder .track-controls select:hover { border-color: var(--hairline-strong); }
#songBuilder .track-controls input[type=range] { width: 76px; }

#songBuilder .ghost-btn {
    height: 30px; padding: 0 12px;
    background: transparent; color: var(--muted);
    border: 1px solid var(--hairline); border-radius: var(--radius-sm);
    font: 600 12px var(--font-ui);
    cursor: pointer;
    transition: color 120ms ease, border-color 120ms ease, background 120ms ease, transform 100ms ease;
}
#songBuilder .ghost-btn:hover { color: var(--text); border-color: var(--hairline-strong); background: rgba(255, 255, 255, 0.03); }
#songBuilder .ghost-btn:active { transform: scale(0.96); }

/* synth engine sub-panel (sequencer track) */
#songBuilder .synth-controls {
    margin: 2px 0 14px;
    padding: 11px 14px 12px;
    background: var(--bg-inset);
    border: 1px solid var(--hairline);
    border-radius: 10px;
    box-shadow: inset 0 2px 8px -4px rgba(0, 0, 0, 0.6);
}
#songBuilder .synth-controls::before {
    content: 'Synth';
    flex-basis: 100%;
    font-family: var(--font-label); font-size: 9.5px; font-weight: 600;
    letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--amber); opacity: 0.85;
}

/* electric-piano sub-panel (both track types) — mirrors .synth-controls */
#songBuilder .ep-controls {
    margin: 2px 0 14px;
    padding: 11px 14px 12px;
    background: var(--bg-inset);
    border: 1px solid var(--hairline);
    border-radius: 10px;
    box-shadow: inset 0 2px 8px -4px rgba(0, 0, 0, 0.6);
}
#songBuilder .ep-controls::before {
    content: 'E. Piano';
    flex-basis: 100%;
    font-family: var(--font-label); font-size: 9.5px; font-weight: 600;
    letter-spacing: 0.22em; text-transform: uppercase;
    color: var(--amber); opacity: 0.85;
}
#songBuilder .synth-readout {
    font-family: var(--font-mono); font-size: 10.5px;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0; text-transform: none;
    color: var(--muted);
    min-width: 34px;
}

/* ── Drum grid ───────────────────────────────────────────────────────────── */
#songBuilder .drum-grid { display: flex; flex-direction: column; gap: 5px; }
#songBuilder .drum-row { display: flex; align-items: center; gap: 10px; }
#songBuilder .drum-row-label {
    flex: none; width: 86px; height: 28px; padding: 0 9px;
    text-align: left;
    font-family: var(--font-label); font-size: 10.5px; font-weight: 600;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--muted); background: transparent;
    border: 1px solid var(--hairline); border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color 120ms ease, border-color 120ms ease;
}
#songBuilder .drum-row-label:hover {
    color: var(--track-accent);
    border-color: color-mix(in srgb, var(--track-accent) 45%, transparent);
}
#songBuilder .drum-cells {
    display: grid; grid-template-columns: repeat(16, minmax(20px, 1fr)); gap: 4px;
    flex: 1; min-width: 0; overflow-x: auto;
    padding-bottom: 2px;
}
#songBuilder .drum-cells::-webkit-scrollbar { height: 6px; }
#songBuilder .drum-cells::-webkit-scrollbar-thumb { background: var(--bg-control); border-radius: 3px; }
#songBuilder .drum-cell {
    height: 26px; padding: 0;
    border-radius: 6px; cursor: pointer;
    background: var(--bg-control);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.35);
    transition: background 80ms ease, box-shadow 120ms ease, transform 80ms ease;
}
#songBuilder .drum-cell:hover { background: #242a38; }
#songBuilder .drum-cell:active { transform: scale(0.92); }
#songBuilder .drum-cell.beat-start:not(:first-child) { margin-left: 7px; }  /* groups of 4 */
#songBuilder .drum-cell.on {
    background: linear-gradient(180deg, color-mix(in srgb, var(--track-accent) 88%, white), var(--track-accent));
    border-color: transparent;
    box-shadow:
        0 0 10px -2px color-mix(in srgb, var(--track-accent) 70%, transparent),
        inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
#songBuilder .drum-cell.playhead { outline: 1px solid rgba(255, 255, 255, 0.75); outline-offset: 1px; }
#songBuilder .drum-cell.playhead:not(.on) { background: #2a3040; }
#songBuilder .drum-cell.on.playhead { filter: brightness(1.25) saturate(1.1); }

/* ── Step tiles (sequencer + chords) ─────────────────────────────────────── */
#songBuilder .seq-slots, #songBuilder .chord-slots { display: flex; flex-wrap: wrap; gap: 8px; }
#songBuilder .seq-slot, #songBuilder .chord-slot {
    position: relative;
    min-width: 60px; min-height: 62px; padding: 6px;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
    background: var(--bg-control);
    border: 1px solid var(--hairline); border-radius: 10px;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    transition: border-color 120ms ease, background 120ms ease, box-shadow 150ms ease, transform 100ms ease;
}
#songBuilder .chord-slot { min-width: 78px; }
#songBuilder .seq-slot:hover, #songBuilder .chord-slot:hover { border-color: var(--hairline-strong); }
#songBuilder .seq-slot.filled, #songBuilder .chord-slot.filled { border-color: color-mix(in srgb, var(--track-accent) 45%, transparent); }
#songBuilder .seq-slot.selected, #songBuilder .chord-slot.selected {
    border-color: var(--amber);
    box-shadow: 0 0 0 1px var(--amber), 0 0 16px -6px var(--amber-glow);
}
#songBuilder .seq-slot.rest, #songBuilder .chord-slot.rest { border-style: dashed; background: transparent; opacity: 0.55; }
#songBuilder .seq-slot.dragging, #songBuilder .chord-slot.dragging { opacity: 0.4; }
#songBuilder .seq-slot.drag-over-left, #songBuilder .chord-slot.drag-over-left { box-shadow: -3px 0 0 var(--amber); }
#songBuilder .seq-slot.drag-over-right, #songBuilder .chord-slot.drag-over-right { box-shadow: 3px 0 0 var(--amber); }

#songBuilder .seq-slot.seq-playing, #songBuilder .chord-slot.chord-playing {
    background: linear-gradient(180deg, color-mix(in srgb, var(--track-accent) 88%, white), var(--track-accent));
    border-color: transparent;
    color: #0b1210;
    box-shadow: 0 0 18px -4px color-mix(in srgb, var(--track-accent) 80%, transparent);
}
#songBuilder .seq-slot.seq-playing .seq-slot-idx,
#songBuilder .seq-slot.seq-playing .seq-slot-rest,
#songBuilder .chord-slot.chord-playing .chord-slot-numeral { color: rgba(8, 14, 11, 0.65); }

#songBuilder .seq-slot-idx {
    position: absolute; top: 5px; left: 7px;
    font-family: var(--font-mono); font-size: 9px; color: var(--faint);
}
#songBuilder .seq-slot-note { font-family: var(--font-mono); font-size: 15px; font-weight: 600; letter-spacing: -0.02em; }
#songBuilder .seq-slot-rest, #songBuilder .chord-slot .chord-slot-numeral:only-child {
    font-family: var(--font-label); font-size: 9.5px;
    letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint);
}
#songBuilder .chord-slot-name { font-size: 15px; font-weight: 700; }
#songBuilder .chord-slot-numeral { font-family: var(--font-mono); font-size: 10px; color: var(--muted); }

/* ── Variation chip button (variation-picker spec §2.1) ──────────────────── */
#songBuilder .chord-slot .voicing-chip-btn {
    padding: 2px 6px;
    background: var(--bg-control);
    border: 1px solid var(--hairline);
    border-radius: 5px;
    font-family: var(--font-mono); font-size: 9px; color: var(--muted);
    cursor: pointer;
}
#songBuilder .chord-slot .voicing-chip-btn:hover {
    color: var(--text);
    border-color: var(--hairline-strong);
}
#songBuilder .chord-slot .voicing-chip-btn.pinned { color: var(--amber); }
#songBuilder .chord-slot.chord-playing .voicing-chip-btn {
    border-color: transparent;
    color: rgba(8, 14, 11, 0.65);
}

/* ── Export MIDI button disabled state (spec §4) ─────────────────────────── */
#songBuilder [data-daw="export-midi"][aria-disabled="true"] {
    opacity: 0.45;
    cursor: not-allowed;
}
#songBuilder [data-daw="export-midi"][aria-disabled="true"]:hover {
    border-color: var(--hairline);
    background: var(--bg-control);
}

/* ── Pickers (note palette / chord palette) ──────────────────────────────── */
#songBuilder .seq-picker, #songBuilder .chord-palette {
    display: flex; flex-wrap: wrap; align-items: center; gap: 7px;
    margin-top: 12px;
    opacity: 0.5;
    transition: opacity 200ms ease;
}
#songBuilder .seq-picker.armed, #songBuilder .chord-palette.armed { opacity: 1; }
#songBuilder .seq-picker.hidden, #songBuilder .chord-palette.hidden { display: none; }
#songBuilder .picker-hint {
    font-family: var(--font-label); font-size: 9.5px; font-weight: 600;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--faint); margin-right: 3px;
    transition: color 200ms ease;
}
#songBuilder .armed .picker-hint { color: var(--amber); }

#songBuilder .chord-chip {
    display: inline-flex; align-items: baseline; gap: 6px;
    padding: 7px 11px;
    background: var(--bg-control); color: var(--text);
    border: 1px solid var(--hairline); border-radius: 8px;
    font: 600 12.5px var(--font-ui);
    cursor: pointer;
    transition: border-color 120ms ease, transform 100ms ease, background 120ms ease;
}
#songBuilder .chord-chip:hover {
    border-color: var(--track-accent);
    background: color-mix(in srgb, var(--track-accent) 8%, var(--bg-control));
    transform: translateY(-1px);
}
#songBuilder .chord-chip:active { transform: scale(0.96); }
#songBuilder .chip-numeral { font-family: var(--font-mono); font-size: 10px; color: var(--muted); }

/* ── Motion & small screens ──────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    #songBuilder *, #songBuilder *::before, #songBuilder *::after { transition-duration: 0.01ms !important; animation: none !important; }
}

@media (max-width: 900px) {
    #songBuilder .toolbar-spacer { display: none; }
    #songBuilder .daw-toolbar { padding: 10px 14px; gap: 10px 14px; }
    #songBuilder .track-list { padding: 16px 12px 0; }
    #songBuilder .mixer .vol-slider { width: 86px; }
}
@media (max-width: 560px) {
    #songBuilder .daw-btn span { display: none; }
    #songBuilder .daw-btn { padding: 0 13px; }
}

/* ── Paper console variant — overrides for values hardcoded to the dark desk.
   theme.js sets data-theme="light" on <body>; #songBuilder sits inside it, so
   these outrank the base scoped rules on specificity.
   NOTE: this app's toolbar buttons are ".daw-btn" (brief draft referenced
   ".transport-btn"); there is no ".brand-mark" element in this markup, so
   that override from the brief is not applicable and is omitted. ────────── */
[data-theme="light"] #songBuilder .daw-toolbar {
    background: color-mix(in srgb, var(--bg-raised) 88%, transparent);
    box-shadow: 0 12px 32px -24px rgba(64, 52, 22, 0.45);
}
[data-theme="light"] #songBuilder .daw-btn:hover {
    background: color-mix(in srgb, var(--text) 8%, var(--bg-control));
}
[data-theme="light"] #songBuilder .daw-btn.primary {
    background: var(--amber);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 2px 10px -2px var(--amber-glow);
}
[data-theme="light"] #songBuilder .daw-btn.primary:hover {
    background: var(--accent-hover);
}
[data-theme="light"] #songBuilder .track {
    box-shadow: 0 14px 30px -22px rgba(64, 52, 22, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
[data-theme="light"] #songBuilder .drum-cell:hover {
    background: color-mix(in srgb, var(--text) 10%, var(--bg-control));
}
[data-theme="light"] #songBuilder .drum-cell.playhead {
    outline-color: rgba(32, 28, 20, 0.75);
}
[data-theme="light"] #songBuilder .drum-cell.playhead:not(.on) {
    background: color-mix(in srgb, var(--text) 16%, var(--bg-control));
}
[data-theme="light"] #songBuilder .seq-slot.seq-playing,
[data-theme="light"] #songBuilder .chord-slot.chord-playing {
    color: #fff;
}
[data-theme="light"] #songBuilder .seq-slot.seq-playing .seq-slot-idx,
[data-theme="light"] #songBuilder .seq-slot.seq-playing .seq-slot-rest,
[data-theme="light"] #songBuilder .chord-slot.chord-playing .chord-slot-numeral {
    color: rgba(255, 255, 255, 0.8);
}
[data-theme="light"] #songBuilder .chord-slot.chord-playing .voicing-chip-btn {
    color: rgba(255, 255, 255, 0.8);
}

/* ── Voicing popover (variation-picker spec §2.2) ────────────────────────── */
.voicing-popover {
    position: fixed; z-index: 2100;   /* above every app layer (settings modal 1000, film-grain overlay 2000) */
    width: 280px; max-height: 420px;
    display: flex; flex-direction: column; gap: 8px;
    padding: 10px;
    background: var(--bg-raised);
    border: 1px solid var(--hairline-strong);
    border-radius: 10px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}
.voicing-popover:focus { outline: none; }
.vp-header { display: flex; align-items: baseline; gap: 6px; }
.vp-title { font-size: 14px; font-weight: 700; color: var(--text); }
.vp-numeral { font-family: var(--font-mono); font-size: 10px; color: var(--muted); flex: 1; }
.vp-close {
    background: none; border: 0; padding: 2px 4px;
    color: var(--muted); font-size: 12px; cursor: pointer;
}
.vp-close:hover { color: var(--text); }
.vp-section-label {
    display: block; margin-bottom: 4px;
    font-family: var(--font-mono); font-size: 9px;
    text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted);
}
.vp-chips { display: flex; flex-wrap: wrap; gap: 4px; }
.vp-chip {
    position: relative;
    padding: 2px 7px;
    background: var(--bg-control);
    border: 1px solid var(--hairline);
    border-radius: 5px;
    font-family: var(--font-mono); font-size: 10px; color: var(--text);
    cursor: pointer;
}
.vp-chip:hover { border-color: var(--hairline-strong); }
.vp-chip.current { border-color: var(--amber); color: var(--amber); }
.vp-chip.diatonic::after {
    content: ''; position: absolute; top: 2px; right: 2px;
    width: 4px; height: 4px; border-radius: 50%;
    background: var(--accent);
}
.vp-all {
    overflow-y: auto; min-height: 0;
    display: flex; flex-direction: column; gap: 8px;
}
.vp-diagram-area {
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    border-top: 1px solid var(--hairline); padding-top: 8px;
}
.vp-diagram svg { width: 150px; height: auto; }
.vp-diagram-meta {
    display: flex; align-items: center; gap: 6px;
    font-family: var(--font-mono); font-size: 10px; color: var(--muted);
}
.vp-badge {
    padding: 0 5px;
    border: 1px solid var(--hairline-strong); border-radius: 4px;
    font-size: 9px;
}
.vp-badge-adapted { color: var(--amber); border-color: var(--amber); }
.vp-cycle { display: flex; align-items: center; gap: 10px; }
.vp-arrow {
    display: inline-flex; align-items: center; justify-content: center;
    width: 22px; height: 18px;
    background: var(--bg-control);
    border: 1px solid var(--hairline); border-radius: 5px;
    color: var(--muted); cursor: pointer;
}
.vp-arrow:hover { color: var(--text); }
.vp-arrow svg { width: 12px; height: 12px; }
.vp-cycle-label {
    min-width: 60px; text-align: center;
    font-family: var(--font-mono); font-size: 10px; color: var(--text);
}
@media (max-width: 560px) {
    .voicing-popover { width: calc(100vw - 16px); }
}