/* Ambient Sound Mixer - Dark Theme */

:root {
    --bg-primary: #0d0d0f;
    --bg-secondary: #151518;
    --bg-tertiary: #1a1a1f;
    --bg-hover: #222228;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border: #27272a;
    --success: #22c55e;
    --warning: #f59e0b;
    --shadow: rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* Master Controls Header */
.master-controls {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px var(--shadow);
}

.master-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.master-left h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.about-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.about-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--text-primary);
}

.master-center {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.play-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--accent);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--accent-glow);
}

.play-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--accent-glow);
}

.play-btn.playing {
    background: var(--success);
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.master-volume {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.volume-icon {
    font-size: 1.25rem;
}

.volume-display {
    min-width: 45px;
    text-align: right;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.master-right {
    display: flex;
    align-items: center;
}

.preset-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preset-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    min-width: 180px;
    cursor: pointer;
}

.preset-select:focus {
    outline: none;
    border-color: var(--accent);
}

.preset-select optgroup {
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-style: normal;
    font-weight: 600;
    padding: 0.5rem;
}

.preset-select option {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.25rem;
}

.btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
}

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

.btn-primary:hover {
    background: var(--accent-hover);
}

.upload-btn {
    display: inline-flex;
    align-items: center;
}

/* Sliders */
.slider {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 0 10px var(--accent-glow);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: var(--accent-hover);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px var(--accent-glow);
}

.master-slider {
    width: 150px;
}

/* Main Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 2rem 2rem 2rem;
}

/* Loading State */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    color: #fca5a5;
}

.error code {
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: monospace;
}

/* Topics Container */
.topics-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Topic Accordion */
.topic {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.topic:hover {
    border-color: var(--accent);
}

.topic.has-active-sounds {
    border-color: var(--success);
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.15);
}

.topic.has-active-sounds .topic-emoji {
    filter: drop-shadow(0 0 8px rgba(34, 197, 94, 0.5));
}

.topic-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: background 0.2s ease;
    user-select: none;
}

.topic-header:hover {
    background: var(--bg-hover);
}

.topic-emoji {
    font-size: 2rem;
    margin-right: 1rem;
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.topic-name {
    font-size: 1.25rem;
    font-weight: 600;
    flex: 1;
}

.topic-count {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-right: 1rem;
}

.topic-chevron {
    color: var(--text-muted);
    transition: transform 0.3s ease;
    font-size: 1.25rem;
}

.topic.expanded .topic-chevron {
    transform: rotate(180deg);
}

.topic-content {
    display: none;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.topic.expanded .topic-content {
    display: block;
}

/* Sound Groups Grid */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

/* Sound Group Card */
.sound-group {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    transition: all 0.2s ease;
}

.sound-group:hover {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.sound-group.active {
    border-color: var(--success);
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.2);
}

.group-header {
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.group-emoji {
    font-size: 1.5rem;
    margin-right: 0.75rem;
}

.group-name {
    font-size: 0.95rem;
    font-weight: 500;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.group-files {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.group-slider-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.group-slider {
    flex: 1;
    height: 6px;
}

.group-volume-display {
    min-width: 35px;
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Playing indicator */
.sound-group.active .group-emoji {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    min-width: 360px;
    box-shadow: 0 20px 60px var(--shadow);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.preset-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.preset-input:focus {
    outline: none;
    border-color: var(--accent);
}

.modal-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

/* Attribution Modal */
.attribution-modal {
    background: rgba(0, 0, 0, 0.9);
}

.attribution-content {
    text-align: center;
    max-width: 480px;
}

.attribution-logo {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 20px var(--accent-glow));
}

.attribution-content h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.attribution-text {
    text-align: left;
    margin-bottom: 1.5rem;
}

.attribution-text p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.attribution-text strong {
    color: var(--text-primary);
}

.attribution-copyright {
    font-size: 0.85rem;
    color: var(--text-muted) !important;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-top: 1rem;
}

.attribution-copyright a {
    color: var(--accent);
    text-decoration: none;
}

.attribution-copyright a:hover {
    text-decoration: underline;
}

.attribution-support {
    text-align: center;
    font-size: 0.95rem;
    margin-bottom: 0.75rem !important;
}

.coffee-btn {
    display: inline-block;
    background: linear-gradient(135deg, #ff813f 0%, #ffdd00 100%);
    color: #000;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(255, 129, 63, 0.3);
}

.coffee-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 129, 63, 0.4);
}

.attribution-close {
    margin-top: 1.5rem;
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
}

/* Responsive */
@media (max-width: 900px) {
    .master-controls {
        flex-wrap: wrap;
        padding: 1rem;
        gap: 1rem;
    }
    
    .master-left {
        order: 1;
    }
    
    .master-center {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .master-right {
        order: 2;
        margin-left: auto;
    }
    
    .container {
        padding-top: 180px;
    }
}

@media (max-width: 600px) {
    .master-controls {
        padding: 0.75rem;
    }
    
    .master-left h1 {
        font-size: 1.25rem;
    }
    
    .preset-controls {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }
    
    .preset-select {
        min-width: 140px;
    }
    
    .master-right {
        width: 100%;
        order: 3;
    }
    
    .master-center {
        order: 2;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 260px 1rem 1rem 1rem;
    }
}

@media (max-width: 400px) {
    .container {
        padding: 300px 0.75rem 1rem 0.75rem;
    }
    
    .master-left h1 {
        font-size: 1.1rem;
    }
    
    .about-btn {
        padding: 0.3rem 0.5rem;
        font-size: 0.75rem;
    }
}

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

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

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

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