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

body {
    font-family: 'Inter', sans-serif;
    background: #f5f6f5;
    color: #2d2d2d;
    min-height: 100vh;
    overflow: hidden;
    transition: background 0.3s, color 0.3s;
}

body.dark {
    background: #1a1a1a;
    color: #e0e0e0;
}

.container {
    display: flex;
    height: 100vh;
    position: relative;
}

.sidebar {
    width: 280px;
    background: linear-gradient(135deg, #ffffff 0%, #f1f3f5 100%);
    border-right: 1px solid rgba(0, 0, 0, 0.05);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: fixed;
    height: 100%;
    z-index: 10;
    transform: translateX(0);
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.06);
    border-radius: 0 16px 16px 0;
}

body.dark .sidebar {
    background: linear-gradient(135deg, #2c2c2c 0%, #1e1e1e 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
}

.sidebar.collapsed {
    transform: translateX(-280px);
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        max-width: 300px;
        transform: translateX(-100%);
        border-radius: 0;
    }
    .sidebar.active {
        transform: translateX(0);
    }
}

.sidebar-header {
    max-height: 80px;
    padding: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    flex: 0 0 auto;
    background: rgba(255, 255, 255, 0.98);
    text-align: center;
    border-radius: 0 16px 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark .sidebar-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(40, 40, 40, 0.98);
}

.logo {
    max-width: 120px;
    height: auto;
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.1));
}

body.dark .logo {
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.4));
}

.sidebar-content {
    padding: 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: hidden;
}

.sidebar-section {
    margin-bottom: 24px;
    flex: 0 0 auto;
}

.sidebar-section.channels {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sidebar-section.status {
    margin-top: auto;
}

.url-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.url-input-group input[type="text"] {
    flex: 1;
    margin-bottom: 16px;
}

.url-input-group button {
    width: 48px;
    height: 48px;
    padding: 0;
    margin-bottom: 16px;
}

input[type="text"], input[type="file"] {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 16px;
    border: 1px solid #d8d8d8;
    border-radius: 10px;
    background: #fff;
    color: #2d2d2d;
    font-size: 0.95rem;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.2s;
}

body.dark input[type="text"], body.dark input[type="file"] {
    border: 1px solid #505050;
    background: #363636;
    color: #e0e0e0;
}

input[type="text"]:focus, input[type="file"]:focus {
    border-color: #007bff;
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.25);
    transform: scale(1.01);
    outline: none;
}

body.dark input[type="text"]:focus, body.dark input[type="file"]:focus {
    border-color: #4da8ff;
    box-shadow: 0 0 8px rgba(77, 168, 255, 0.25);
}

input[type="text"]::placeholder {
    color: #999;
}

body.dark input[type="text"]::placeholder {
    color: #a0a0a0;
}

button {
    padding: 12px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(0, 86, 179, 0.3);
    background: linear-gradient(135deg, #0056b3, #003d82);
}

body.dark button {
    background: linear-gradient(135deg, #4da8ff, #3d8bff);
}

body.dark button:hover {
    background: linear-gradient(135deg, #3d8bff, #2b6bff);
    box-shadow: 0 6px 14px rgba(61, 139, 255, 0.3);
}

button i {
    font-size: 1.2rem;
}

.playlist-controls {
    display: flex;
    gap: 10px;
}

.playlist-controls button {
    width: 33.33%;
    margin-bottom: 0;
    padding: 12px;
    background: #e9ecef;
    color: #2d2d2d;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
}

body.dark .playlist-controls button {
    background: #404040;
    color: #e0e0e0;
}

.playlist-controls button:hover {
    background: #007bff;
    color: #fff;
    transform: scale(1.06);
    box-shadow: 0 6px 12px rgba(0, 123, 255, 0.3);
}

body.dark .playlist-controls button:hover {
    background: #4da8ff;
    box-shadow: 0 6px 12px rgba(77, 168, 255, 0.3);
}

.player-section {
    flex: 1;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

#videoPlayer {
    width: 100%;
    height: 100vh;
    object-fit: contain;
}

.top-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 16px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 5;
}

.player-section:hover .top-controls {
    opacity: 1;
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.98);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
}

body.dark .sidebar-toggle {
    background: rgba(40, 40, 40, 0.98);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.sidebar-toggle i {
    font-size: 1.5rem;
    color: #2d2d2d;
    transition: color 0.3s;
}

body.dark .sidebar-toggle i {
    color: #e0e0e0;
}

.sidebar-toggle:hover {
    background: #007bff;
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.3);
}

body.dark .sidebar-toggle:hover {
    background: #4da8ff;
}

.sidebar-toggle:hover i {
    color: #fff;
}

.theme-switch {
    display: flex;
    align-items: center;
}

.theme-switch input[type="checkbox"] {
    display: none;
}

.theme-switch .slider {
    position: relative;
    width: 60px;
    height: 30px;
    background: #e0e0e0;
    border-radius: 30px;
    cursor: pointer;
    transition: background 0.3s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
}

body.dark .theme-switch .slider {
    background: #505050;
}

.theme-switch .slider i {
    font-size: 1.1rem;
    transition: opacity 0.3s;
}

.theme-switch .slider i.fa-moon { opacity: 1; }
.theme-switch .slider i.fa-sun { opacity: 0; }

.theme-switch input[type="checkbox"]:checked + .slider {
    background: #007bff;
}

body.dark .theme-switch input[type="checkbox"]:checked + .slider {
    background: #4da8ff;
}

.theme-switch input[type="checkbox"]:checked + .slider i.fa-moon { opacity: 0; }
.theme-switch input[type="checkbox"]:checked + .slider i.fa-sun { opacity: 1; }

.channel-list, .history-list {
    flex: 1;
    overflow-y: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.channel-list::-webkit-scrollbar, .history-list::-webkit-scrollbar {
    display: none;
}

.channel {
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    margin-bottom: 5px;
    max-width: 250px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
}

body.dark .channel {
    background: #383838;
}

.channel:hover {
    background: #e9ecef;
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.dark .channel:hover {
    background: #505050;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.channel.selected {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    transform: translateX(6px);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.3);
}

body.dark .channel.selected {
    background: linear-gradient(135deg, #4da8ff, #3d8bff);
    box-shadow: 0 6px 16px rgba(77, 168, 255, 0.3);
}

.channel.selected .fav-star {
    color: #fff;
}

.channel.favorited {
    background: linear-gradient(135deg, #28a745, #218838);
    color: #fff;
}

body.dark .channel.favorited {
    background: linear-gradient(135deg, #34c759, #28a745);
}

.channel-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin-right: 8px;
    border-radius: 4px;
    vertical-align: middle;
}

.channel-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.channel-status {
    font-size: 0.8rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}

.channel-status.active {
    background: linear-gradient(135deg, #28a745, #218838);
    color: #fff;
}

body.dark .channel-status.active {
    background: linear-gradient(135deg, #34c759, #28a745);
}

.channel-status.offline {
    background: linear-gradient(135deg, #dc3545, #c82333);
    color: #fff;
}

body.dark .channel-status.offline {
    background: linear-gradient(135deg, #e04b5a, #dc3545);
}

.fav-star {
    cursor: pointer;
    color: #f1c40f;
    font-size: 1.4rem;
    transition: transform 0.2s;
}

.fav-star:hover {
    transform: scale(1.2);
}

.history-item {
    padding: 8px 12px;
    background: #f9f9f9;
    border-radius: 8px;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s, transform 0.2s;
}

body.dark .history-item {
    background: #383838;
}

.history-item:hover {
    background: #e9ecef;
    transform: translateX(4px);
}

body.dark .history-item:hover {
    background: #505050;
}

.history-item button {
    width: auto;
    padding: 6px 10px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    border-radius: 8px;
    font-size: 0.9rem;
}

.history-item button:hover {
    background: linear-gradient(135deg, #0056b3, #003d82);
}

body.dark .history-item button {
    background: linear-gradient(135deg, #4da8ff, #3d8bff);
}

body.dark .history-item button:hover {
    background: linear-gradient(135deg, #3d8bff, #2b6bff);
}

.history-item .delete-btn {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.history-item .delete-btn:hover {
    background: linear-gradient(135deg, #c82333, #b31d2b);
}

body.dark .history-item .delete-btn {
    background: linear-gradient(135deg, #e04b5a, #dc3545);
}

body.dark .history-item .delete-btn:hover {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.playlist-status {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.playlist-status span {
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.3s, opacity 0.3s;
    cursor: pointer;
}

.playlist-status span:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

body.dark .playlist-status span:hover {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.playlist-status span.active-filter {
    opacity: 0.9;
    transform: scale(1.05);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
}

body.dark .playlist-status span.active-filter {
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.4);
}

.total { background: #e0e0e0; }
body.dark .total { background: #505050; }
.active { background: linear-gradient(135deg, rgba(77, 168, 255, 0.3), #2c2c2c); color: #fff; }
body.dark .active { background: linear-gradient(135deg, rgba(77, 168, 255, 0.3), rgba(0, 123, 255, 0.3)); }
.offline { background: linear-gradient(135deg, #dc3545, #c82333); color: #fff; }
body.dark .offline { background: linear-gradient(135deg, #e04b5a, #dc3545); }

.now-playing {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 12px 18px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 10px;
    display: none;
    z-index: 5;
    max-width: 50%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
    font-weight: 600;
}

.notification {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: rgba(0, 0, 0, 0.9);
    color: #fff;
    border-radius: 10px;
    display: none;
    z-index: 10;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.notification.with-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 12px 24px;
}

.notification.with-buttons button {
    width: auto;
    padding: 8px 16px;
    font-size: 0.9rem;
    border-radius: 8px;
    background: linear-gradient(135deg, #28a745, #218838);
}

.notification.with-buttons button:hover {
    background: linear-gradient(135deg, #218838, #1c7430);
}

.notification.with-buttons button.no {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.notification.with-buttons button.no:hover {
    background: linear-gradient(135deg, #c82333, #b31d2b);
}

body.dark .notification.with-buttons button {
    background: linear-gradient(135deg, #34c759, #28a745);
}

body.dark .notification.with-buttons button:hover {
    background: linear-gradient(135deg, #28a745, #218838);
}

body.dark .notification.with-buttons button.no {
    background: linear-gradient(135deg, #e04b5a, #dc3545);
}

body.dark .notification.with-buttons button.no:hover {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.player-controls {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 14px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 5;
}

.player-section:hover .player-controls {
    opacity: 1;
}

.player-controls button {
    width: 50px;
    height: 50px;
    padding: 0;
    font-size: 1.3rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #ffffff, #e9ecef);
    color: #2d2d2d;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
}

body.dark .player-controls button {
    background: linear-gradient(135deg, #404040, #2c2c2c);
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.player-controls button:hover {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    transform: scale(1.12);
    box-shadow: 0 6px 16px rgba(0, 123, 255, 0.3);
}

body.dark .player-controls button:hover {
    background: linear-gradient(135deg, #4da8ff, #3d8bff);
    box-shadow: 0 6px 16px rgba(77, 168, 255, 0.3);
}

#qualityIndicator {
    padding: 14px;
    background: linear-gradient(135deg, #ffffff, #e9ecef);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    color: #2d2d2d;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body.dark #qualityIndicator {
    background: linear-gradient(135deg, #404040, #2c2c2c);
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

@media (max-width: 768px) {
    .player-controls {
        bottom: 12px;
        gap: 10px;
    }
    .player-controls button {
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
    }
    .now-playing {
        font-size: 0.9rem;
        padding: 10px 14px;
        max-width: 70%;
    }
    .playlist-controls button {
        padding: 10px;
    }
    .url-input-group button {
        width: 42px;
        height: 42px;
    }
}