/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #a5b4fc;
    --secondary-color: #10b981;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --error: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.2s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header Styles */
.header {
    text-align: center;
    padding: 2rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.guitar-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* Search Section */
.search-section {
    margin-bottom: 2rem;
}

.search-container {
    display: flex;
    gap: 0.5rem;
    max-width: 600px;
    margin: 0 auto 1rem;
}

.search-input {
    flex: 1;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: 1rem 1.25rem;
    background: var(--primary-color);
    border: none;
    border-radius: var(--radius);
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}

/* Quick Filters */
.quick-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.filter-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Chord Results Grid */
.chord-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Chord Card */
.chord-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.chord-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.chord-card .chord-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    text-align: center;
    color: var(--text-primary);
}

.chord-card canvas {
    display: block;
    margin: 0 auto;
}

/* Chord Detail Section */
.chord-detail {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chord-detail.hidden {
    display: none;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.detail-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.close-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--surface-hover);
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    background: var(--error);
    color: white;
}

.detail-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: flex-start;
}

.diagram-container {
    flex-shrink: 0;
}

.chord-info {
    flex: 1;
    min-width: 200px;
}

.info-item {
    margin-bottom: 1rem;
}

.info-item .label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.info-item .value {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Audio Controls */
.audio-controls {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.play-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.play-btn:not(.secondary) {
    background: var(--secondary-color);
    color: white;
}

.play-btn:not(.secondary):hover {
    background: #059669;
}

.play-btn.secondary {
    background: var(--surface-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.play-btn.secondary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Alternative Fingerings */
.alternative-fingerings {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.alternative-fingerings h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.alt-fingerings-grid {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.alt-fingering-card {
    flex-shrink: 0;
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.alt-fingering-card:hover,
.alt-fingering-card.active {
    border-color: var(--primary-color);
}

.alt-fingering-card .position-label {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Progressions Section */
.progressions-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.progressions-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.key-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.key-selector label {
    font-size: 1rem;
    color: var(--text-secondary);
}

.key-selector select {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-primary);
    cursor: pointer;
}

.key-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.progressions-list {
    display: grid;
    gap: 1rem;
}

.progression-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.25rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.progression-card:hover {
    border-color: var(--primary-light);
}

.progression-card .progression-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-light);
}

.progression-card .progression-numerals {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.progression-chords {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.progression-chord {
    padding: 0.5rem 1rem;
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.progression-chord:hover {
    background: var(--primary-color);
}

.play-progression-btn {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.play-progression-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* Footer */
.footer {
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* No Results Message */
.no-results {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-results svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .guitar-icon {
        width: 32px;
        height: 32px;
    }

    .search-input {
        padding: 0.875rem 1rem;
    }

    .chord-results {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .detail-content {
        flex-direction: column;
        align-items: center;
    }

    .chord-info {
        width: 100%;
        text-align: center;
    }

    .audio-controls {
        justify-content: center;
    }

    .alt-fingerings-grid {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .app-container {
        padding: 0 0.75rem;
    }

    .chord-results {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .chord-card {
        padding: 0.75rem;
    }

    .filter-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
    }

    .audio-controls {
        flex-direction: column;
    }

    .play-btn {
        justify-content: center;
    }

    .progression-chords {
        justify-content: center;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus States */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}