/* ══════════════════════════════════════════════════════════════
   Chord Grid Builder — Step Sequencer Chord Styles
   ══════════════════════════════════════════════════════════════ */

.cg-workspace {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* ── Controls Bar ── */
.cg-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.cg-controls .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.cg-bpm {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cg-bpm input[type="number"] {
    width: 4rem;
    padding: 0.3rem 0.4rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.85rem;
    text-align: center;
    font-family: var(--font-mono);
}

.cg-key {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cg-controls-spacer { flex: 1; }

/* ── Chord Palette ── */
.cg-palette {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
}

.cg-palette h4 {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cg-diatonic,
.cg-extended {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cg-chord-btn {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    min-width: 56px;
}

.cg-chord-btn:hover {
    border-color: var(--accent);
    background: rgba(99,179,237,0.08);
}

.cg-chord-btn .cg-roman {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.cg-chord-btn.minor { border-left: 3px solid #9b87f5; }
.cg-chord-btn.diminished { border-left: 3px solid #ff6b6b; }
.cg-chord-btn.dominant { border-left: 3px solid #ffa726; }
.cg-chord-btn.major { border-left: 3px solid #4ecdc4; }

/* ── Diatonic Legend (replaces add-chord buttons) ── */
.cg-diatonic-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    width: 100%;
}
.cg-legend-item {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.78rem;
    border-left: 3px solid var(--accent);
    background: rgba(99,179,237,0.04);
    border-radius: 4px;
}
.cg-legend-item.minor { border-left-color: #9b87f5; }
.cg-legend-item.diminished { border-left-color: #ff6b6b; }
.cg-legend-roman {
    font-weight: 700;
    color: var(--accent-light);
    min-width: 2rem;
}
.cg-legend-name {
    font-weight: 600;
    color: var(--text);
}
.cg-legend-desc {
    color: var(--text-muted);
    font-size: 0.72rem;
}

.cg-extended-toggle {
    margin-top: 0.5rem;
}

.btn-sm {
    font-size: 0.78rem;
    padding: 0.25rem 0.6rem;
}

/* ── Progress Bar ── */
.cg-progress {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.cg-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    transition: width 0.05s linear;
    border-radius: 2px;
}

/* ── Grid ── */
.cg-grid-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.cg-grid {
    display: grid;
    gap: 0;
    min-width: fit-content;
}

.cg-empty-msg {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Step numbers header */
.cg-step-num {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-align: center;
    padding: 0.2rem 0;
    user-select: none;
}

.cg-step-num.cg-marker {
    color: var(--text);
    font-weight: 600;
}

/* Track label (chord info + remove) */
.cg-track-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.5rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    border-right: 1px solid var(--border);
    min-height: 36px;
}

.cg-track-label:hover {
    background: rgba(99,179,237,0.06);
}

.cg-track-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cg-track-roman {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-left: 0.2rem;
}

.cg-track-remove {
    width: 18px;
    height: 18px;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    line-height: 1;
    border-radius: 3px;
    padding: 0;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
}

.cg-track-label:hover .cg-track-remove {
    opacity: 1;
}

.cg-track-remove:hover {
    color: #ff6b6b;
    background: rgba(255,107,107,0.1);
}

/* Grid cells */
.cg-cell {
    width: 100%;
    min-height: 36px;
    border: 1px solid transparent;
    border-bottom: 1px solid var(--border);
    background: transparent;
    cursor: pointer;
    transition: background 0.1s;
}

.cg-cell:hover {
    background: rgba(99,179,237,0.08);
}

.cg-cell.beat-start {
    border-left: 1px solid var(--border);
}

.cg-cell.active {
    background: var(--accent);
    border-radius: 3px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
}

.cg-cell.step-playing {
    box-shadow: inset 0 0 8px rgba(99,179,237,0.4);
}

.cg-cell.active.step-playing {
    background: var(--accent-light);
    box-shadow: 0 0 8px var(--accent), inset 0 0 0 1px rgba(255,255,255,0.2);
}

/* Alternating row shading */
.cg-grid .cg-row-even .cg-cell {
    background: rgba(128,128,128,0.03);
}
.cg-grid .cg-row-even .cg-cell.active {
    background: var(--accent);
}

/* ── Volume ── */
.cg-volume {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.cg-volume input[type="range"] {
    width: 120px;
    accent-color: var(--accent);
}

/* ── Presets ── */
.cg-presets {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
}

.cg-presets h4 {
    margin: 0 0 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cg-preset-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
}

.cg-preset-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.82rem;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
}

.cg-preset-btn:hover {
    border-color: var(--accent);
    background: rgba(99,179,237,0.08);
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .cg-controls {
        padding: 0.75rem;
    }

    .cg-palette {
        padding: 0.75rem;
    }

    .cg-chord-btn {
        min-width: 48px;
        padding: 0.3rem 0.5rem;
        font-size: 0.78rem;
    }

    .cg-track-label {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }
}