:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --highlight-color: #e94560;
}

body {
    background-color: #0d1117;
    color: #f0f0f0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow-x: hidden;
}

.navbar {
    background-color: var(--primary-color) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
    color: rgba(243, 240, 240, 0.5) !important;
}

.video-container {
    background-color: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
}

#video-player {
    width: 100%;
    height: 480px;
}

.channel-info {
    background-color: var(--secondary-color);
    padding: 8px;
    padding-inline-start: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
}

.channel-logo {
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
    color: white;
}

.channel-name {
    font-size: 1.2rem;
    font-weight: bold;
    color: white;
}

.channel-list {
    background-color: var(--secondary-color);
    border-radius: 8px;
    padding: 15px;
    height: calc(100vh - 92px);
    overflow-y: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.channel-group {
    margin-bottom: 20px;
}

.group-header {
    background-color: var(--accent-color);
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.group-header:hover {
    background-color: #1a3a6e;
}

.group-header h5 {
    margin: 0;
    font-weight: bold;
    color: white;
}

.channel-item {
    padding: 12px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
}

.channel-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.channel-item.active {
    background-color: rgba(233, 69, 96, 0.2);
    border-left: 3px solid var(--highlight-color);
}

.channel-item i {
    margin-right: 10px;
    color: var(--highlight-color);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .channel-list {
        height: auto;
        max-height: 400px;
        margin-top: 20px;
    }
    
    #video-player {
        height: 300px;
    }
}