:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
}

body {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #1a2a6c);
    background-attachment: fixed;
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

.header-section {
    background: rgba(25, 25, 35, 0.95);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    margin: 2rem auto;
    padding: 2.5rem;
    max-width: 1200px;
}

.category-title {
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    font-weight: 700;
    position: relative;
    padding-bottom: 20px;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 3px;
}

.video-card {
    transition: all 0.3s ease;
    border-radius: 15px;
    overflow: hidden;
    background: rgba(30, 30, 40, 0.8);
}

.video-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
}

.play-icon {
    opacity: 0;
    transition: all 0.3s ease;
}

.video-card:hover .play-icon {
    opacity: 1;
    transform: scale(1.1);
}

.page-item .page-link {
    background-color: rgba(30, 30, 40, 0.8);
    color: var(--light-color);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-color: transparent;
}

.nav-buttons {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}

.nav-btn {
    background: rgba(44, 62, 80, 0.9);
    border: none;
    border-radius: 50px;
    color: white;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

.stats-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    z-index: 5;
    background: rgba(231, 76, 60, 0.9);
    font-weight: bold;
}

@media (max-width: 768px) {
    .header-section {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .category-title {
        font-size: 2rem;
    }
}