/* English4 Template - Modern Purple Theme */

/* CSS Variables for consistent theming */
:root {
    --primary-purple: #7c3aed;
    --primary-purple-light: #a855f7;
    --primary-purple-dark: #6d28d9;
    --secondary-purple: #e9d5ff;
    --accent-purple: #f3e8ff;
    --light-bg: #faf5ff;
    --white: #ffffff;
    --text-dark: #1f2937;
    --text-medium: #6b7280;
    --text-light: #9ca3af;
    --shadow-light: 0 4px 6px rgba(124, 58, 237, 0.1);
    --shadow-medium: 0 10px 15px rgba(124, 58, 237, 0.15);
    --shadow-heavy: 0 20px 25px rgba(124, 58, 237, 0.2);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--light-bg) 0%, var(--accent-purple) 100%);
    color: var(--text-dark);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-light);
    border-bottom: 1px solid rgba(124, 58, 237, 0.1);
    padding: 1.5rem 0;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--primary-purple) !important;
    letter-spacing: -0.5px;
}

/* Search */
.search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 16px 24px;
    border: 2px solid rgba(124, 58, 237, 0.2);
    border-radius: 50px;
    background: var(--white);
    font-size: 16px;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.search-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.search-btn:hover {
    background: linear-gradient(135deg, var(--primary-purple-dark), var(--primary-purple));
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-medium);
    color: var(--white);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-purple-light) 50%, var(--accent-purple) 100%);
    color: var(--white);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="geometric" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.2)"/></pattern></defs><rect width="100" height="100" fill="url(%23geometric)"/></svg>');
    opacity: 0.4;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 2rem;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    letter-spacing: -1px;
    line-height: 0.9;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 3rem;
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Video Grid - Masonry Layout */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.video-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid rgba(124, 58, 237, 0.08);
    position: relative;
    break-inside: avoid;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--primary-purple-light);
}

/* Video Thumbnail */
.video-thumbnail-container {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
}

.video-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    display: block;
    position: relative;
    z-index: 1;
}

.video-card:hover .video-thumbnail {
    transform: scale(1.1);
}

/* Play Overlay */
.video-play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(0, 0, 0, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    border: 2px solid var(--white);
    z-index: 15;
    pointer-events: none;
}

.video-thumbnail-container:hover .video-play-overlay {
    opacity: 1;
}

.video-play-icon {
    width: 0;
    height: 0;
    border-left: 15px solid var(--white);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    margin-left: 2px;
}

/* Play Link */
.play-link {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.play-link:hover {
    text-decoration: none;
    color: inherit;
}

/* Video Content */
.video-content {
    padding: 1.5rem;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-title a {
    color: inherit;
    text-decoration: none;
}

.video-title a:hover {
    color: var(--primary-purple);
}

.video-description {
    color: var(--text-medium);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Video Meta */
.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.video-stats {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-light);
    font-size: 0.85rem;
}

.video-duration, .video-views {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Tags */
.video-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.video-tag {
    background: var(--secondary-purple);
    color: var(--primary-purple);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid rgba(124, 58, 237, 0.2);
}

.video-tag:hover {
    background: var(--primary-purple);
    color: var(--white);
    transform: translateY(-1px);
}

/* Watch Button */
.watch-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
    color: var(--white);
    padding: 10px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-light);
}

.watch-btn:hover {
    background: linear-gradient(135deg, var(--primary-purple-dark), var(--primary-purple));
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    color: var(--white);
    text-decoration: none;
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    margin: 4rem 0;
}

.page-link {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    padding: 12px 16px;
    margin: 0 4px;
    border-radius: 10px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    border: 2px solid rgba(124, 58, 237, 0.1);
}

.page-link:hover {
    background: var(--primary-purple);
    border-color: var(--primary-purple);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
    border-color: var(--primary-purple);
    color: var(--white);
    box-shadow: var(--shadow-medium);
}

/* Empty State */
.empty-container {
    text-align: center;
    padding: 5rem 2rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    margin: 3rem 0;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 2rem;
    opacity: 0.5;
    color: var(--primary-purple);
}

.empty-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.empty-text {
    font-size: 1.1rem;
    color: var(--text-medium);
    max-width: 500px;
    margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.4rem;
    }

    .search-container {
        max-width: 350px;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 4rem 1rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .video-content {
        padding: 1.25rem;
    }

    .video-title {
        font-size: 1rem;
    }
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.video-card {
    animation: fadeInUp 0.6s ease-out;
}

.video-card:nth-child(2) { animation-delay: 0.1s; }
.video-card:nth-child(3) { animation-delay: 0.2s; }
.video-card:nth-child(4) { animation-delay: 0.3s; }
.video-card:nth-child(5) { animation-delay: 0.4s; }

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-purple-light);
}

/* Special effects */
.video-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(124, 58, 237, 0.02) 100%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.video-card:hover::before {
    opacity: 1;
}