/* CSS Variables - Dark Mode (default) */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-hover: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --border-color: #333333;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8e8;
    --bg-hover: #e0e0e0;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #d0d0d0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo svg {
    color: var(--accent-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.mobile-filter-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 20px;
    position: sticky;
    top: 73px;
    height: calc(100vh - 73px);
    overflow-y: auto;
}

.filter-section {
    margin-bottom: 24px;
}

.filter-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

/* Search Box */
.search-box {
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

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

.clear-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    opacity: 0;
    transition: opacity 0.2s;
}

.search-box input:not(:placeholder-shown) + .clear-btn {
    opacity: 1;
}

.clear-btn:hover {
    color: var(--text-primary);
}

/* Select Dropdowns */
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

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

/* Checkbox Container */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
    color: var(--text-primary);
}

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

.checkbox-container input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

/* Buttons */
.reset-btn {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
}

.reset-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

/* View Toggle */
.toggle-buttons {
    display: flex;
    gap: 8px;
}

.view-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.view-btn:hover {
    background-color: var(--bg-tertiary);
}

.view-btn.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 24px;
    min-height: calc(100vh - 73px);
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    gap: 16px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Channel Grid */
.channel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.channel-grid.list-view {
    grid-template-columns: 1fr;
}

/* Channel Card */
.channel-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.channel-card:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.list-view .channel-card {
    flex-direction: row;
    align-items: center;
    padding: 16px 20px;
}

.channel-header {
    display: flex;
    align-items: center;
    gap: 12px;
}

.channel-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.channel-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.channel-logo-placeholder {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.channel-info-card {
    flex: 1;
    min-width: 0;
}

.channel-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Saved Badge */
.saved-badge {
    display: inline-flex;
    color: var(--accent-color);
    flex-shrink: 0;
}

.channel-card.saved {
    border-color: var(--accent-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.channel-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.channel-tag {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.channel-tag.quality {
    background-color: rgba(99, 102, 241, 0.2);
    color: var(--accent-color);
}

.channel-tag.country {
    background-color: rgba(34, 197, 94, 0.2);
    color: var(--success-color);
}

.channel-tag.category {
    background-color: rgba(249, 115, 22, 0.2);
    color: #f97316;
}

.play-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    opacity: 0;
    transition: opacity 0.2s;
}

.channel-card:hover .play-indicator {
    opacity: 1;
}

.list-view .play-indicator {
    margin-left: auto;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--text-primary);
}

/* Player Container */
.player-container {
    position: relative;
    background-color: #000;
    aspect-ratio: 16/9;
}

#videoPlayer {
    width: 100%;
    height: 100%;
    display: block;
}

.player-error {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.9);
    color: var(--text-secondary);
    gap: 16px;
    text-align: center;
    padding: 20px;
}

.retry-btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-md);
    background-color: var(--accent-color);
    color: white;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

/* Player Controls */
.player-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background-color: var(--bg-tertiary);
}

.volume-control,
.playback-controls,
.extra-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.control-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

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

.control-btn.play-pause {
    background-color: var(--accent-color);
    color: white;
    padding: 12px;
    border-radius: 50%;
}

.control-btn.play-pause:hover {
    background-color: var(--accent-hover);
}

/* Save Button */
.control-btn.saved,
.control-btn.saved:hover {
    color: var(--accent-color);
}

#volumeSlider {
    width: 100px;
    height: 4px;
    -webkit-appearance: none;
    background: var(--bg-hover);
    border-radius: 2px;
    cursor: pointer;
}

#volumeSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

#volumeSlider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Channel Info in Modal */
.channel-info {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 900px) {
    .mobile-filter-btn {
        display: flex;
    }
    
    .sidebar {
        display: none;
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: calc(100vh - 73px);
        z-index: 99;
        border-right: none;
        background-color: var(--bg-secondary);
        overflow-y: auto;
    }
    
    .sidebar.open {
        display: block;
    }
    
    .main-content {
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .header {
        padding: 12px 16px;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .content-area {
        padding: 16px;
    }
    
    .channel-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .channel-card {
        padding: 16px;
    }
    
    .modal {
        padding: 0;
    }
    
    .modal-content {
        max-height: 100vh;
        border-radius: 0;
        height: 100vh;
    }
    
    .modal-header {
        padding: 16px;
    }
    
    .modal-header h2 {
        font-size: 1rem;
    }
    
    .player-controls {
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 12px;
        justify-content: center;
    }
    
    .volume-control {
        order: 1;
        width: 100%;
        justify-content: center;
    }
    
    #volumeSlider {
        flex: 1;
        max-width: 150px;
    }
    
    .playback-controls {
        order: 0;
    }
    
    .extra-controls {
        order: 2;
    }
    
    .channel-info {
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 12px;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .logo svg {
        width: 24px;
        height: 24px;
    }
    
    .logo h1 {
        font-size: 1rem;
    }
    
    .header-actions {
        gap: 8px;
    }
    
    #channelCount {
        font-size: 0.8rem;
    }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}