/* ============================================
   INTERVAL REFERENCE SONGS - PAGE STYLES
   ============================================ */

/* Interval Grid */
.interval-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 10px;
    padding: 20px;
}

.interval-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 12px;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.interval-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.interval-card.active {
    background: rgba(20, 184, 166, 0.1);
    border-color: var(--primary);
}

.interval-card.perfect {
    border-left: 4px solid #3b82f6;
}

.interval-card.major {
    border-left: 4px solid #22c55e;
}

.interval-card.minor {
    border-left: 4px solid #f59e0b;
}

.interval-card.tritone {
    border-left: 4px solid #ef4444;
}

.interval-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.interval-abbrev {
    font-size: 11px;
    color: var(--text-light);
}

.interval-play-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    margin-top: 10px;
    transition: all 0.15s ease;
}

.interval-play-btn:hover {
    transform: scale(1.1);
    background: #0d9488;
}

.interval-play-btn svg {
    width: 14px;
    height: 14px;
}

/* Interval Detail Panel */
.interval-detail {
    padding: 24px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.detail-placeholder {
    text-align: center;
    padding: 20px;
    color: var(--text-light);
}

.detail-content {
    max-width: 600px;
    margin: 0 auto;
}

.detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.detail-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
}

.detail-semitones {
    font-size: 14px;
    color: var(--text-light);
    background: var(--card);
    padding: 6px 12px;
    border-radius: 6px;
}

.detail-play-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--primary);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.detail-play-btn:hover {
    background: #0d9488;
    transform: translateY(-1px);
}

.detail-play-btn svg {
    width: 18px;
    height: 18px;
}

/* Song Examples */
.song-examples {
    margin-top: 24px;
}

.song-example {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 12px;
}

.song-example:last-child {
    margin-bottom: 0;
}

.song-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.song-info {
    flex: 1;
}

.song-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.song-note {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
}

.song-lyrics {
    font-style: italic;
    color: var(--primary);
}

/* Reference Table */
.reference-table-wrapper {
    overflow-x: auto;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.reference-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.reference-table th,
.reference-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.reference-table th {
    background: var(--bg);
    font-weight: 700;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
}

.reference-table tbody tr:last-child td {
    border-bottom: none;
}

.reference-table tbody tr:hover {
    background: var(--bg);
}

.reference-table .interval-cell {
    font-weight: 700;
    color: var(--text);
}

.reference-table .semitone-cell {
    font-family: 'SF Mono', monospace;
    color: var(--text-light);
}

.reference-table .song-cell {
    color: var(--text);
}

.reference-table .song-cell em {
    font-style: normal;
    color: var(--text-light);
    font-size: 12px;
}

/* Quality Badges */
.quality-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 8px;
}

.quality-badge.perfect {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
}

.quality-badge.major {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.quality-badge.minor {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.quality-badge.tritone {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* Responsive */
@media (max-width: 768px) {
    .interval-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 16px;
    }

    .interval-card {
        padding: 12px 8px;
    }

    .interval-name {
        font-size: 12px;
    }

    .detail-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .reference-table {
        font-size: 13px;
    }

    .reference-table th,
    .reference-table td {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    .interval-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .interval-play-btn {
        width: 32px;
        height: 32px;
    }

    .song-example {
        flex-direction: column;
        gap: 10px;
    }

    .song-number {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
}