/**
 * Guitar Chord Finder - Tool-specific styles
 * Uses three-column-tool.css as base
 *
 * Tool theming via CSS variables:
 *   --tool-primary: #667eea (purple-blue gradient)
 *   --tool-primary-dark: #5568d3
 *   --tool-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%)
 *   --tool-light: #f0f4ff
 */

/* ========================================
   TOOL THEME VARIABLES
   ======================================== */
:root {
    --tool-primary: #667eea;
    --tool-primary-dark: #5568d3;
    --tool-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --tool-light: #f0f4ff;

    /* Guitar-specific colors */
    --guitar-accent: #764ba2;
    --guitar-success: #28a745;
    --guitar-warning: #ffc107;
    --guitar-danger: #dc3545;
}

[data-theme="dark"] {
    --tool-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --tool-light: rgba(102, 126, 234, 0.15);
}

/* ========================================
   TWO-COLUMN LAYOUT (Override three-column)
   ======================================== */
.guitar-tool-container {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    min-height: calc(100vh - 180px);
}

@media (max-width: 991px) {
    .guitar-tool-container {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 1rem;
    }
}

/* ========================================
   CONTROL PANEL (Left Column)
   ======================================== */
.guitar-control-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 90px;
    height: fit-content;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
}

@media (max-width: 991px) {
    .guitar-control-panel {
        position: relative;
        top: auto;
        max-height: none;
        overflow-y: visible;
    }
}

/* ========================================
   SEARCH CARD
   ======================================== */
.chord-search-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

.chord-search-input {
    display: flex;
    gap: 0.5rem;
    position: relative;
}

/* ========================================
   AUTOCOMPLETE DROPDOWN
   ======================================== */
.chord-autocomplete {
    position: absolute;
    top: 100%;
    left: 0;
    right: 50px;
    background: var(--bg-primary, #fff);
    border: 2px solid var(--tool-primary);
    border-top: none;
    border-radius: 0 0 0.5rem 0.5rem;
    max-height: 280px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: none;
}

.chord-autocomplete.active {
    display: block;
}

.chord-autocomplete-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border, #e2e8f0);
    transition: background 0.15s;
}

.chord-autocomplete-item:last-child {
    border-bottom: none;
}

.chord-autocomplete-item:hover,
.chord-autocomplete-item.selected {
    background: var(--tool-light, #f0f4ff);
}

.chord-autocomplete-item .chord-name {
    font-weight: 600;
    color: var(--text-primary, #0f172a);
    font-size: 0.95rem;
}

.chord-autocomplete-item .chord-full-name {
    color: var(--text-secondary, #64748b);
    font-size: 0.8rem;
    margin-left: 0.5rem;
}

.chord-autocomplete-item .chord-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chord-autocomplete-item .chord-difficulty {
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    font-weight: 600;
    text-transform: uppercase;
}

.chord-autocomplete-item .chord-difficulty.beginner {
    background: rgba(40, 167, 69, 0.15);
    color: #28a745;
}

.chord-autocomplete-item .chord-difficulty.intermediate {
    background: rgba(255, 193, 7, 0.15);
    color: #d39e00;
}

.chord-autocomplete-item .chord-difficulty.advanced {
    background: rgba(220, 53, 69, 0.15);
    color: #dc3545;
}

.chord-autocomplete-empty {
    padding: 0.75rem;
    text-align: center;
    color: var(--text-secondary, #64748b);
    font-size: 0.85rem;
}

.chord-autocomplete-hint {
    padding: 0.5rem 0.75rem;
    background: var(--bg-secondary, #f8fafc);
    font-size: 0.75rem;
    color: var(--text-secondary, #64748b);
    border-top: 1px solid var(--border, #e2e8f0);
}

[data-theme="dark"] .chord-autocomplete {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--tool-primary);
}

[data-theme="dark"] .chord-autocomplete-item:hover,
[data-theme="dark"] .chord-autocomplete-item.selected {
    background: rgba(102, 126, 234, 0.2);
}

.chord-search-input input {
    flex: 1;
    padding: 0.625rem 0.875rem;
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 0.5rem;
    font-size: 0.95rem;
    background: var(--bg-primary, #fff);
    color: var(--text-primary, #0f172a);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chord-search-input input:focus {
    outline: none;
    border-color: var(--tool-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.chord-search-input button {
    padding: 0.625rem 1rem;
    background: var(--tool-gradient);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.chord-search-input button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* ========================================
   QUICK ACCESS SECTION
   ======================================== */
.quick-access-section {
    margin-top: 1rem;
    padding: 0.875rem;
    background: var(--bg-secondary, #f8fafc);
    border-radius: 0.5rem;
}

.quick-access-section strong {
    font-size: 0.8rem;
    color: var(--text-secondary, #64748b);
    display: block;
    margin-bottom: 0.5rem;
}

.quick-chords-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.quick-chord-btn {
    padding: 0.375rem 0.75rem;
    border: 2px solid var(--border, #e2e8f0);
    background: var(--bg-primary, #fff);
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--text-primary, #0f172a);
}

.quick-chord-btn:hover {
    border-color: var(--tool-primary);
    background: var(--tool-primary);
    color: white;
    transform: translateY(-1px);
}

/* ========================================
   CHORD TYPE SELECTOR
   ======================================== */
.chord-type-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.chord-type-selector .btn {
    padding: 0.25rem 0.625rem;
    border: 2px solid var(--border, #e2e8f0);
    background: var(--bg-primary, #fff);
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-primary, #0f172a);
}

.chord-type-selector .btn:hover {
    border-color: var(--guitar-accent);
    background: var(--guitar-accent);
    color: white;
}

/* ========================================
   CAPO SECTION
   ======================================== */
.capo-card {
    background: linear-gradient(135deg, #fff3cd 0%, #ffe69c 100%);
    padding: 1rem;
    border-radius: 0.75rem;
    border: 2px solid var(--guitar-warning);
}

[data-theme="dark"] .capo-card {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.15) 0%, rgba(255, 193, 7, 0.1) 100%);
    border-color: rgba(255, 193, 7, 0.4);
}

.capo-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.capo-header strong {
    color: #856404;
    font-size: 0.85rem;
}

[data-theme="dark"] .capo-header strong {
    color: #fcd34d;
}

#capoDisplay {
    background: var(--bg-primary, #fff);
    padding: 0.25rem 0.625rem;
    border-radius: 0.25rem;
    font-weight: 700;
    color: #856404;
    font-size: 0.85rem;
}

[data-theme="dark"] #capoDisplay {
    background: rgba(0, 0, 0, 0.2);
    color: #fcd34d;
}

.capo-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 193, 7, 0.3);
    border-radius: 3px;
    outline: none;
}

.capo-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--guitar-warning);
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.capo-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--guitar-warning);
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.capo-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.25rem;
}

.capo-labels small {
    font-size: 0.7rem;
    color: #856404;
}

[data-theme="dark"] .capo-labels small {
    color: #fcd34d;
}

/* ========================================
   MULTI-CHORD MODE TOGGLE
   ======================================== */
.multi-chord-toggle {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1rem;
}

.multi-chord-toggle label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary, #0f172a);
}

.multi-chord-toggle input[type="checkbox"] {
    width: 40px;
    height: 22px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border, #e2e8f0);
    border-radius: 11px;
    position: relative;
    cursor: pointer;
    transition: background 0.3s;
}

.multi-chord-toggle input[type="checkbox"]:checked {
    background: var(--tool-primary);
}

.multi-chord-toggle input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}

.multi-chord-toggle input[type="checkbox"]:checked::before {
    transform: translateX(18px);
}

/* ========================================
   DISPLAY PANEL (Right Column)
   ======================================== */
.guitar-display-panel {
    min-height: 500px;
}

/* ========================================
   SELECTED CHORDS BAR
   ======================================== */
.selected-chords-bar {
    background: var(--bg-secondary, #f8fafc);
    padding: 0.875rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border, #e2e8f0);
    display: none;
}

.selected-chords-bar.visible {
    display: block;
}

.selected-chords-bar strong {
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
    margin-right: 0.75rem;
}

.selected-chord-tag {
    display: inline-block;
    background: var(--tool-primary);
    color: white;
    padding: 0.25rem 0.625rem;
    border-radius: 0.375rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.selected-chord-tag:hover {
    background: var(--tool-primary-dark);
    transform: translateY(-1px);
}

.selected-chord-tag .remove-chord {
    margin-left: 0.5rem;
    font-weight: bold;
    opacity: 0.8;
}

.selected-chords-actions {
    float: right;
    display: flex;
    gap: 0.5rem;
}

.selected-chords-actions button {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    border: 1px solid;
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
}

.selected-chords-actions button:hover {
    opacity: 0.8;
}

/* ========================================
   CHORD DISPLAY CARD
   ======================================== */
.chord-display-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   CHORD HEADER
   ======================================== */
.chord-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.chord-info-box {
    background: linear-gradient(135deg, #e7f3ff 0%, #cfe5ff 100%);
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    border: 2px solid #b3d9ff;
    flex: 1;
}

[data-theme="dark"] .chord-info-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-color: rgba(59, 130, 246, 0.3);
}

.chord-info-box h3,
.chord-info-box h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0056b3;
    margin: 0;
}

[data-theme="dark"] .chord-info-box h3,
[data-theme="dark"] .chord-info-box h4 {
    color: #93c5fd;
}

/* ========================================
   PLAY BUTTON
   ======================================== */
.play-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--tool-gradient);
    color: white;
    border: none;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-left: 3px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    margin-left: 1rem;
}

.play-btn:hover {
    transform: scale(1.05);
}

.play-btn:active {
    transform: scale(0.95);
}

.play-label {
    font-size: 0.7rem;
    color: var(--text-secondary, #64748b);
    text-align: center;
    margin-top: 0.25rem;
    font-weight: 600;
}

/* ========================================
   CONTENT GRID
   ======================================== */
.chord-content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .chord-content-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   FRETBOARD SECTION
   ======================================== */
.fretboard-section {
    background: var(--bg-secondary, #f8fafc);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border, #e2e8f0);
}

.fretboard-section h6 {
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
    margin-bottom: 0.75rem;
    font-weight: 700;
    text-align: center;
}

.fretboard-svg {
    width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   STRING VIBRATION ANIMATION
   ======================================== */
.guitar-string {
    transition: stroke 0.1s ease;
}

.guitar-string.vibrating {
    animation: string-vibrate 0.6s ease-out;
    stroke: var(--tool-primary) !important;
    filter: drop-shadow(0 0 3px var(--tool-primary));
}

/* Thicker strings vibrate slower/wider, thinner strings faster/narrower */
.guitar-string.vibrating.string-0 { animation-duration: 0.8s; }
.guitar-string.vibrating.string-1 { animation-duration: 0.7s; }
.guitar-string.vibrating.string-2 { animation-duration: 0.65s; }
.guitar-string.vibrating.string-3 { animation-duration: 0.55s; }
.guitar-string.vibrating.string-4 { animation-duration: 0.5s; }
.guitar-string.vibrating.string-5 { animation-duration: 0.45s; }

@keyframes string-vibrate {
    0% { transform: translateX(0); }
    10% { transform: translateX(-3px); }
    20% { transform: translateX(3px); }
    30% { transform: translateX(-2.5px); }
    40% { transform: translateX(2.5px); }
    50% { transform: translateX(-2px); }
    60% { transform: translateX(2px); }
    70% { transform: translateX(-1px); }
    80% { transform: translateX(1px); }
    90% { transform: translateX(-0.5px); }
    100% { transform: translateX(0); }
}

/* Strum sweep animation */
.strum-indicator {
    position: absolute;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--tool-primary), transparent);
    opacity: 0;
    pointer-events: none;
    border-radius: 2px;
}

.strum-indicator.active {
    animation: strum-sweep 0.3s ease-out;
}

@keyframes strum-sweep {
    0% {
        opacity: 0.8;
        left: 0;
    }
    100% {
        opacity: 0;
        left: 100%;
    }
}

/* Glow effect on play button when playing */
.play-btn.playing {
    animation: pulse-glow 0.5s ease-out;
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
}

/* ========================================
   FINGER POSITIONS SECTION
   ======================================== */
.finger-positions-section {
    background: var(--bg-secondary, #f8fafc);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border, #e2e8f0);
}

.finger-positions-section strong {
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
    display: block;
    margin-bottom: 0.75rem;
}

.finger-guide > div {
    background: var(--bg-primary, #fff);
    padding: 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.8rem;
    border-left: 3px solid var(--tool-primary);
    margin-bottom: 0.375rem;
    color: var(--text-primary, #0f172a);
}

.finger-legend {
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    color: var(--text-secondary, #64748b);
}

[data-theme="dark"] .finger-legend {
    background: rgba(59, 130, 246, 0.15);
}

/* ========================================
   VARIATIONS SECTION
   ======================================== */
.variations-section {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 2px solid var(--border, #e2e8f0);
}

.variations-section h5 {
    color: var(--text-primary, #0f172a);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.variation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
}

.variation-card,
.variation-grid .card {
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 0.5rem;
    padding: 0.75rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-primary, #fff);
}

.variation-card:hover,
.variation-grid .card:hover {
    border-color: var(--tool-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.variation-card strong,
.variation-grid .card strong {
    color: var(--tool-primary);
    font-weight: 700;
    font-size: 0.875rem;
}

.variation-card .position-text {
    font-size: 0.7rem;
    color: var(--text-secondary, #64748b);
}

/* ========================================
   DOWNLOAD SECTION
   ======================================== */
.download-section {
    text-align: center;
    margin-top: 1rem;
}

.download-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--tool-primary);
    background: transparent;
    color: var(--tool-primary);
    border-radius: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.download-btn:hover {
    background: var(--tool-primary);
    color: white;
}

/* ========================================
   WELCOME SECTION
   ======================================== */
.welcome-section {
    text-align: center;
    padding: 3rem 1.5rem;
}

.welcome-section h4 {
    color: var(--tool-primary);
    font-weight: 700;
    margin-bottom: 1rem;
}

.welcome-section p {
    color: var(--text-secondary, #64748b);
}

.welcome-tip {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #fff8e1;
    border-left: 4px solid var(--guitar-warning);
    border-radius: 0.375rem;
    font-size: 0.9rem;
    display: inline-block;
    text-align: left;
    color: var(--text-primary, #0f172a);
}

[data-theme="dark"] .welcome-tip {
    background: rgba(255, 193, 7, 0.1);
}

/* ========================================
   MULTI-CHORD GRID
   ======================================== */
.multi-chord-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.multi-chord-card {
    background: var(--bg-primary, #fff);
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.2s;
}

.multi-chord-card:hover {
    border-color: var(--tool-primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.multi-chord-card.playing {
    border-color: var(--tool-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3), 0 4px 12px rgba(102, 126, 234, 0.3);
    animation: card-pulse 0.4s ease-out;
}

@keyframes card-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.multi-chord-card .chord-info-box {
    margin-bottom: 0.75rem;
    padding: 0.5rem 0.75rem;
}

.multi-chord-card .chord-info-box h4 {
    font-size: 1.1rem;
}

.multi-chord-card .play-btn {
    width: 40px;
    height: 40px;
    font-size: 16px;
    margin-left: 0.5rem;
}

.multi-chord-card .fretboard {
    background: var(--bg-secondary, #f8fafc);
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border, #e2e8f0);
}

.multi-chord-card .finger-positions {
    margin-top: 0.5rem;
}

/* ========================================
   MOBILE RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    .guitar-tool-container {
        padding: 0.5rem;
    }

    .chord-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .chord-info-box {
        text-align: center;
    }

    .play-btn {
        margin: 0 auto;
        min-height: 48px;
        min-width: 48px;
    }

    .chord-display-card {
        padding: 1rem;
    }

    .variation-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .multi-chord-grid {
        grid-template-columns: 1fr;
    }

    /* Touch-friendly controls */
    .chord-search-input input {
        font-size: 16px; /* Prevent iOS zoom */
        min-height: 44px;
    }

    .chord-search-input button {
        min-width: 44px;
        min-height: 44px;
    }

    /* Settings toggles */
    .settings-toggles {
        flex-direction: column;
        gap: 0.5rem;
    }

    .setting-toggle {
        padding: 0.75rem;
        min-height: 44px;
        justify-content: flex-start;
    }

    /* Quick chord buttons */
    .quick-chords-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 0.375rem;
    }

    .quick-chord-btn {
        min-height: 40px;
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    /* Chord type selector */
    .chord-type-selector {
        gap: 0.375rem;
    }

    .chord-type-selector .btn {
        min-height: 36px;
        padding: 0.375rem 0.625rem;
        font-size: 0.8rem;
    }

    /* Capo slider */
    .capo-slider {
        height: 8px;
    }

    /* Multi-chord mode */
    .multi-chord-card {
        padding: 0.75rem;
    }

    .selected-chords-bar {
        flex-wrap: wrap;
        gap: 0.375rem;
    }

    .selected-chord-tag {
        padding: 0.375rem 0.625rem;
        font-size: 0.85rem;
    }

    /* Fretboard SVG - ensure it scales */
    .fretboard-svg {
        max-width: 100%;
        height: auto;
    }

    /* Finger guide */
    .finger-guide {
        font-size: 0.8rem;
    }
}

/* Small mobile specific */
@media (max-width: 480px) {
    .quick-chords-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .quick-chord-btn {
        font-size: 0.8rem;
        padding: 0.375rem;
    }

    .chord-type-selector .btn {
        font-size: 0.7rem;
        padding: 0.25rem 0.5rem;
    }

    .chord-name-display {
        font-size: 1.5rem;
    }

    .chord-full-name {
        font-size: 0.9rem;
    }
}

/* ========================================
   DARK MODE SUPPORT
   ======================================== */
[data-theme="dark"] .chord-search-card,
[data-theme="dark"] .multi-chord-toggle,
[data-theme="dark"] .chord-display-card,
[data-theme="dark"] .multi-chord-card {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .chord-search-input input {
    background: var(--bg-tertiary, #334155);
    border-color: var(--border, #475569);
    color: var(--text-primary, #f1f5f9);
}

[data-theme="dark"] .chord-search-input input::placeholder {
    color: var(--text-muted, #64748b);
}

[data-theme="dark"] .quick-access-section,
[data-theme="dark"] .selected-chords-bar,
[data-theme="dark"] .fretboard-section,
[data-theme="dark"] .finger-positions-section {
    background: var(--bg-tertiary, #334155);
}

[data-theme="dark"] .quick-chord-btn,
[data-theme="dark"] .chord-type-selector .btn,
[data-theme="dark"] .variation-card,
[data-theme="dark"] .variation-grid .card {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #475569);
    color: var(--text-primary, #f1f5f9);
}

[data-theme="dark"] .quick-chord-btn:hover,
[data-theme="dark"] .chord-type-selector .btn:hover,
[data-theme="dark"] .variation-card:hover,
[data-theme="dark"] .variation-grid .card:hover {
    background: var(--tool-primary);
    border-color: var(--tool-primary);
    color: white;
}

[data-theme="dark"] .finger-guide > div {
    background: var(--bg-secondary, #1e293b);
    color: var(--text-primary, #f1f5f9);
}

[data-theme="dark"] .download-btn {
    color: var(--tool-primary);
    border-color: var(--tool-primary);
}

[data-theme="dark"] .download-btn:hover {
    background: var(--tool-primary);
    color: white;
}

[data-theme="dark"] .multi-chord-toggle label {
    color: var(--text-primary, #f1f5f9);
}

/* ========================================
   CHORD ACTION BUTTONS (Share, Copy, Favorite, Download)
   ======================================== */
.chord-actions-section {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 2px solid var(--border, #e2e8f0);
    justify-content: center;
}

.chord-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    border: 2px solid var(--border, #e2e8f0);
    background: var(--bg-primary, #fff);
    color: var(--text-secondary, #64748b);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.chord-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.chord-action-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Share Button */
.chord-action-btn.action-share:hover {
    border-color: #1DA1F2;
    color: #1DA1F2;
    background: rgba(29, 161, 242, 0.08);
}

.chord-action-btn.action-share:hover svg {
    fill: #1DA1F2;
}

/* Copy Button */
.chord-action-btn.action-copy:hover {
    border-color: var(--tool-primary);
    color: var(--tool-primary);
    background: rgba(102, 126, 234, 0.08);
}

.chord-action-btn.action-copy:hover svg {
    fill: var(--tool-primary);
}

/* Favorite Button */
.chord-action-btn.action-favorite:hover {
    border-color: #ffc107;
    color: #e6a800;
    background: rgba(255, 193, 7, 0.1);
}

.chord-action-btn.action-favorite:hover svg {
    fill: #ffc107;
}

/* Download Button */
.chord-action-btn.action-download:hover {
    border-color: #28a745;
    color: #28a745;
    background: rgba(40, 167, 69, 0.08);
}

.chord-action-btn.action-download:hover svg {
    fill: #28a745;
}

/* Dark Mode - Action Buttons */
[data-theme="dark"] .chord-action-btn {
    background: var(--bg-tertiary, #334155);
    border-color: var(--border, #475569);
    color: var(--text-secondary, #94a3b8);
}

[data-theme="dark"] .chord-action-btn:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .chord-action-btn.action-share:hover {
    background: rgba(29, 161, 242, 0.15);
}

[data-theme="dark"] .chord-action-btn.action-copy:hover {
    background: rgba(102, 126, 234, 0.15);
}

[data-theme="dark"] .chord-action-btn.action-favorite:hover {
    background: rgba(255, 193, 7, 0.15);
}

[data-theme="dark"] .chord-action-btn.action-download:hover {
    background: rgba(40, 167, 69, 0.15);
}

/* Mobile - Action Buttons */
@media (max-width: 480px) {
    .chord-actions-section {
        gap: 0.375rem;
    }

    .chord-action-btn {
        padding: 0.375rem 0.625rem;
        font-size: 0.75rem;
    }

    .chord-action-btn span {
        display: none;
    }

    .chord-action-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* Favorite chord tag styling */
.favorite-chord {
    position: relative;
}

.favorite-chord .remove-fav {
    font-size: 0.9em;
    margin-left: 0.25rem;
    opacity: 0.7;
    cursor: pointer;
}

.favorite-chord .remove-fav:hover {
    opacity: 1;
    color: var(--guitar-danger);
}

/* ========================================
   FAVORITES SECTION
   ======================================== */
.favorites-section {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1rem;
    text-align: center;
}

.favorites-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.625rem 1rem;
    background: linear-gradient(135deg, #ffc107 0%, #ffca2c 100%);
    border: none;
    border-radius: 0.5rem;
    color: #000;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.favorites-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.4);
}

.favorites-btn svg {
    fill: #000;
}

[data-theme="dark"] .favorites-section {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .favorites-btn {
    background: linear-gradient(135deg, #ffc107 0%, #e6a800 100%);
}

/* ========================================
   CHORD PROGRESSIONS SECTION (Full Width)
   ======================================== */
.progressions-section-full {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.progressions-section-inner {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.progressions-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border, #e2e8f0);
    flex-wrap: wrap;
    gap: 1rem;
}

.progressions-title {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.progressions-title svg {
    color: var(--tool-primary);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.progressions-title h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary, #0f172a);
}

.progressions-title p {
    margin: 0.25rem 0 0 0;
    font-size: 0.875rem;
    color: var(--text-secondary, #64748b);
}

.key-selector-large {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-secondary, #f8fafc);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border, #e2e8f0);
}

.key-selector-large label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary, #64748b);
    white-space: nowrap;
}

.key-selector-large select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--tool-primary);
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    background: var(--bg-primary, #fff);
    color: var(--tool-primary);
    cursor: pointer;
    min-width: 120px;
}

.key-selector-large select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.progressions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

/* Progression Card */
.progression-card {
    background: var(--bg-secondary, #f8fafc);
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.progression-card:hover {
    border-color: var(--tool-primary);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.progression-card.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.progression-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.progression-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary, #0f172a);
}

.progression-genre {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.25rem 0.5rem;
    background: var(--tool-primary);
    color: white;
    border-radius: 0.25rem;
    letter-spacing: 0.03em;
}

.progression-numerals {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tool-primary);
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 0.5rem;
    background: rgba(102, 126, 234, 0.08);
    padding: 0.375rem 0.625rem;
    border-radius: 0.375rem;
    display: inline-block;
}

.progression-chords {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary, #0f172a);
    margin-bottom: 0.625rem;
    letter-spacing: 0.02em;
}

.progression-description {
    font-size: 0.8rem;
    color: var(--text-secondary, #64748b);
    line-height: 1.5;
    margin-bottom: 0.625rem;
    flex-grow: 1;
}

.progression-songs {
    font-size: 0.75rem;
    color: var(--text-muted, #94a3b8);
    margin-bottom: 0.875rem;
    padding: 0.5rem;
    background: var(--bg-primary, #fff);
    border-radius: 0.375rem;
    border: 1px solid var(--border, #e2e8f0);
}

.progression-songs strong {
    color: var(--text-secondary, #64748b);
}

.progression-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: auto;
}

.progression-actions button {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.625rem 0.75rem;
    border: 2px solid var(--border, #e2e8f0);
    background: var(--bg-primary, #fff);
    color: var(--text-secondary, #64748b);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.progression-actions button:hover:not(:disabled) {
    border-color: var(--tool-primary);
    color: white;
    background: var(--tool-primary);
}

.progression-actions button:hover:not(:disabled) svg {
    fill: white;
}

.progression-actions button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.progression-actions button svg {
    flex-shrink: 0;
}

/* Dark Mode - Progressions */
[data-theme="dark"] .progressions-section-inner {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .progressions-title h2 {
    color: var(--text-primary, #f1f5f9);
}

[data-theme="dark"] .key-selector-large {
    background: var(--bg-tertiary, #334155);
    border-color: var(--border, #475569);
}

[data-theme="dark"] .key-selector-large select {
    background: var(--bg-secondary, #1e293b);
    color: var(--tool-primary);
}

[data-theme="dark"] .progression-card {
    background: var(--bg-tertiary, #334155);
    border-color: var(--border, #475569);
}

[data-theme="dark"] .progression-card:hover {
    border-color: var(--tool-primary);
}

[data-theme="dark"] .progression-numerals {
    background: rgba(102, 126, 234, 0.15);
}

[data-theme="dark"] .progression-songs {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #475569);
}

[data-theme="dark"] .progression-actions button {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #475569);
    color: var(--text-secondary, #94a3b8);
}

[data-theme="dark"] .progression-actions button:hover:not(:disabled) {
    background: var(--tool-primary);
    color: white;
}

/* Mobile - Progressions */
@media (max-width: 768px) {
    .progressions-section-full {
        padding: 0 1rem;
        margin: 1.5rem auto;
    }

    .progressions-section-inner {
        padding: 1rem;
    }

    .progressions-section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .key-selector-large {
        width: 100%;
        justify-content: space-between;
    }

    .progressions-grid {
        grid-template-columns: 1fr;
    }

    .progression-card {
        padding: 1rem;
    }

    .progression-chords {
        font-size: 1rem;
    }
}

/* ========================================
   POPULAR SONGS SECTION (1B+ Views)
   ======================================== */
.popular-songs-section-full {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.popular-songs-section-inner {
    background: linear-gradient(135deg, var(--bg-primary, #fff) 0%, var(--bg-secondary, #f8fafc) 100%);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 1rem;
    padding: 1.5rem;
}

.popular-songs-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.popular-songs-title {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.popular-songs-title svg {
    flex-shrink: 0;
    color: #dc2626;
    margin-top: 0.25rem;
}

.popular-songs-title h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
    color: var(--text-primary, #0f172a);
}

.popular-songs-title p {
    font-size: 0.9rem;
    color: var(--text-secondary, #475569);
    margin: 0;
}

.popular-songs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.song-card {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    transition: all 0.2s ease;
}

.song-card:hover {
    border-color: #dc2626;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.1);
    transform: translateY(-2px);
}

.song-card.disabled {
    opacity: 0.6;
}

.song-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.25rem;
    gap: 0.5rem;
}

.song-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary, #0f172a);
}

.song-views {
    font-size: 0.7rem;
    font-weight: 600;
    color: #dc2626;
    background: rgba(220, 38, 38, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 1rem;
    white-space: nowrap;
}

.song-artist {
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
    margin-bottom: 0.75rem;
}

.song-chords {
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 1rem;
    font-weight: 600;
    color: var(--tool-primary, #007bff);
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-secondary, #f8fafc);
    border-radius: 0.5rem;
    text-align: center;
}

.song-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    align-items: center;
}

.song-difficulty {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    text-transform: uppercase;
}

.difficulty-beginner {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.difficulty-intermediate {
    background: rgba(234, 179, 8, 0.1);
    color: #ca8a04;
}

.difficulty-advanced {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.song-capo {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.2rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    color: #4f46e5;
    border-radius: 0.25rem;
}

.song-strumming {
    font-size: 0.7rem;
    color: var(--text-muted, #94a3b8);
    font-family: monospace;
}

.song-actions {
    display: flex;
    gap: 0.5rem;
}

.song-actions button {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.5rem;
    background: var(--bg-primary, #fff);
    color: var(--text-secondary, #475569);
    cursor: pointer;
    transition: all 0.2s ease;
}

.song-actions button:hover:not(:disabled) {
    background: #dc2626;
    border-color: #dc2626;
    color: white;
}

.song-actions button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

/* Dark mode - Popular Songs */
[data-theme="dark"] .popular-songs-section-inner {
    background: linear-gradient(135deg, var(--bg-primary, #0f172a) 0%, var(--bg-secondary, #1e293b) 100%);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .song-card {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .song-card:hover {
    border-color: #dc2626;
}

[data-theme="dark"] .song-chords {
    background: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .song-actions button {
    background: var(--bg-primary, #0f172a);
    border-color: var(--border, #334155);
}

/* Mobile - Popular Songs */
@media (max-width: 768px) {
    .popular-songs-section-full {
        padding: 0 1rem;
        margin: 1.5rem auto;
    }

    .popular-songs-section-inner {
        padding: 1rem;
    }

    .popular-songs-section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .popular-songs-grid {
        grid-template-columns: 1fr;
    }

    .song-card {
        padding: 1rem;
    }

    .song-chords {
        font-size: 0.9rem;
    }
}

/* ========================================
   SETTINGS PANEL
   ======================================== */
.settings-panel {
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.75rem;
    padding: 1rem;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.settings-header strong {
    font-size: 0.9rem;
    color: var(--text-primary, #0f172a);
}

.keyboard-hint {
    font-size: 0.7rem;
    color: var(--text-muted, #94a3b8);
    background: var(--bg-secondary, #f8fafc);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.settings-toggles {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.setting-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.625rem;
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary, #64748b);
    transition: all 0.2s ease;
}

.setting-toggle:hover {
    border-color: var(--tool-primary);
    color: var(--tool-primary);
}

.setting-toggle input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    accent-color: var(--tool-primary);
    cursor: pointer;
}

.setting-toggle input[type="checkbox"]:checked + span {
    color: var(--tool-primary);
    font-weight: 600;
}

/* Dark Mode - Settings */
[data-theme="dark"] .settings-panel {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .keyboard-hint {
    background: var(--bg-tertiary, #334155);
}

[data-theme="dark"] .setting-toggle {
    background: var(--bg-tertiary, #334155);
    border-color: var(--border, #475569);
    color: var(--text-secondary, #94a3b8);
}

/* ========================================
   DIFFICULTY BADGES
   ======================================== */
.chord-title-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.chord-title-row h3 {
    margin: 0;
}

.difficulty-badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.difficulty-beginner {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    color: white;
}

.difficulty-intermediate {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    color: #000;
}

.difficulty-advanced {
    background: linear-gradient(135deg, #ef4444 0%, #f87171 100%);
    color: white;
}

/* Dark Mode - Difficulty Badges (same colors work well) */
[data-theme="dark"] .difficulty-beginner {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
}

[data-theme="dark"] .difficulty-intermediate {
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
}

[data-theme="dark"] .difficulty-advanced {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
}