/* CSS Variables */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #ec4899;
    --background-dark: #0f172a;
    --background-card: #1e293b;
    --background-light: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --border-radius: 12px;
    --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);
}

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

/* Base Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Section Styles */
section {
    background: var(--background-card);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
}

section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* Category Selection */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 12px;
}

.category-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 15px 10px;
    background: var(--background-light);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.category-btn:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

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

.category-btn .icon {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.category-btn .label {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Generator Section */
.generator-controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 25px;
}

.generate-btn, .play-btn, .save-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.generate-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.generate-btn:active {
    transform: translateY(0);
}

.play-btn {
    background: var(--success-color);
    color: white;
}

.play-btn:hover:not(:disabled) {
    background: #16a34a;
    transform: translateY(-2px);
}

.save-btn {
    background: var(--warning-color);
    color: white;
}

.save-btn:hover:not(:disabled) {
    background: #d97706;
    transform: translateY(-2px);
}

.generate-btn:disabled, .play-btn:disabled, .save-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.2rem;
}

/* Visualizer */
.visualizer-container {
    background: var(--background-dark);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#visualizer {
    width: 100%;
    max-width: 600px;
    height: 120px;
    border-radius: 8px;
    background: #0a0a0a;
}

.sound-info {
    margin-top: 15px;
}

.sound-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sound-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

/* Parameter Display */
.parameter-display {
    margin-top: 20px;
    padding: 20px;
    background: var(--background-dark);
    border-radius: var(--border-radius);
}

.parameter-display h3 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--text-secondary);
}

.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.param {
    text-align: center;
    padding: 10px;
    background: var(--background-light);
    border-radius: 8px;
}

.param-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.param-value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.hidden {
    display: none;
}

/* Favorites Section */
.favorites-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.empty-message {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
    padding: 30px;
}

.favorite-item {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.favorite-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.favorite-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.favorite-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--background-dark);
    padding: 3px 8px;
    border-radius: 4px;
}

.favorite-actions {
    display: flex;
    gap: 8px;
}

.favorite-play, .favorite-delete {
    flex: 1;
    padding: 8px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.favorite-play {
    background: var(--success-color);
    color: white;
}

.favorite-play:hover {
    background: #16a34a;
}

.favorite-delete {
    background: var(--danger-color);
    color: white;
}

.favorite-delete:hover {
    background: #dc2626;
}

/* Library Section */
.library-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
}

.library-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 15px;
    background: var(--background-light);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.library-item:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.library-item:active {
    transform: translateY(-1px);
}

.library-item.playing {
    border-color: var(--success-color);
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.4);
}

.library-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.library-name {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Footer */
footer {
    text-align: center;
    padding: 25px;
    margin-top: 30px;
    border-top: 1px solid var(--background-light);
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Animations */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px var(--primary-color); }
    50% { box-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--secondary-color); }
}

.playing-animation {
    animation: pulse 0.5s ease-in-out infinite;
}

.generating {
    animation: glow 1s ease-in-out infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: 15px;
    }

    header {
        padding: 30px 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    section {
        padding: 20px 15px;
    }

    section h2 {
        font-size: 1.25rem;
    }

    .generator-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .generate-btn, .play-btn, .save-btn {
        justify-content: center;
        padding: 12px 20px;
        font-size: 1rem;
    }

    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .category-btn {
        padding: 12px 8px;
    }

    .category-btn .icon {
        font-size: 1.5rem;
    }

    .library-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .library-item {
        padding: 15px 10px;
    }

    .library-icon {
        font-size: 1.5rem;
    }

    .favorites-container {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

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

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

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

/* Print styles */
@media print {
    body {
        background: white;
        color: black;
    }

    .generator-controls, .library-section, #visualizer {
        display: none;
    }
}