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

html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: #333;
    background-color: #fff;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 1.1rem;
}

.nav-logo img {
    width: 40px;
    height: 40px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    z-index: 1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #f3f4f6;
    color: #374151;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

/* Sections */
.featured,
.categories-preview,
.videos-section,
.categories-section,
.content-section {
    padding: 4rem 0;
}

.page-header {
    background: #f8fafc;
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.page-header p {
    font-size: 1.1rem;
    color: #6b7280;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.video-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.video-info {
    padding: 1.5rem;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1f2937;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: #6b7280;
}

.video-description {
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.5;
}

.video-category {
    display: inline-block;
    background: #e0e7ff;
    color: #3730a3;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 1rem;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.category-grid-large {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease;
}

.category-card:hover {
    transform: translateY(-2px);
}

.category-card h3 {
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.category-card p {
    color: #6b7280;
    font-size: 0.9rem;
}

.category-card-large {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
}

.category-card-large h2 {
    color: #1f2937;
    margin-bottom: 1rem;
}

.category-card-large p {
    color: #6b7280;
    margin-bottom: 1.5rem;
}

.category-stats {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

/* Filters */
.filters {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 3rem;
}

.search-box {
    margin-bottom: 1.5rem;
}

.search-box input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
}

.filter-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-controls select {
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.9rem;
    min-width: 150px;
}

/* Video Detail */
.video-detail {
    max-width: 800px;
    margin: 3rem auto;
}

.video-embed {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    margin-bottom: 2rem;
}

.video-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 8px;
}

.video-detail-info h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.video-detail-meta {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.video-detail-meta span {
    color: #6b7280;
    font-size: 0.9rem;
}

.video-topics {
    margin: 1.5rem 0;
}

.video-topics h3 {
    margin-bottom: 0.5rem;
    color: #374151;
}

.topic-tag {
    display: inline-block;
    background: #f3f4f6;
    color: #374151;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    margin: 0.25rem 0.5rem 0.25rem 0;
}

.content-disclaimer {
    background: #f0f9ff;
    border: 1px solid #bae6fd;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 2rem;
    font-size: 0.875rem;
    color: #0c4a6e;
}

/* Content Layouts */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.content-main h2 {
    color: #1f2937;
    margin: 2rem 0 1rem 0;
}

.content-main h2:first-child {
    margin-top: 0;
}

.content-main ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.content-main li {
    margin-bottom: 0.5rem;
}

.content-sidebar {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    height: fit-content;
}

.stats-box,
.cta-box {
    margin-bottom: 2rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.stat-number {
    font-weight: 700;
    color: #2563eb;
    font-size: 1.25rem;
}

.stat-label {
    color: #6b7280;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 2rem;
}

.contact-item {
    margin-bottom: 2rem;
}

.contact-item h3 {
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: #6b7280;
    line-height: 1.6;
}

.contact-item a {
    color: #2563eb;
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Legal Content */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.legal-content h2 {
    color: #1f2937;
    margin: 2rem 0 1rem 0;
    font-size: 1.5rem;
}

.legal-content h3 {
    color: #374151;
    margin: 1.5rem 0 0.75rem 0;
    font-size: 1.2rem;
}

.legal-content ul {
    margin: 1rem 0 1rem 1.5rem;
}

.legal-content li {
    margin-bottom: 0.5rem;
}

.legal-content p {
    margin-bottom: 1rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.no-results {
    text-align: center;
    padding: 3rem;
    color: #6b7280;
}

.not-found {
    text-align: center;
    padding: 4rem 2rem;
}

.not-found h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .filter-controls {
        flex-direction: column;
    }
    
    .filter-controls select {
        width: 100%;
    }
    
    .video-detail-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .featured,
    .categories-preview,
    .videos-section,
    .categories-section,
    .content-section {
        padding: 2rem 0;
    }
    
    .video-card,
    .category-card,
    .category-card-large {
        margin-bottom: 1rem;
    }
    
    .filters {
        padding: 1.5rem;
    }
}

/* RTL Support */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .nav-container {
    flex-direction: row-reverse;
}

[dir="rtl"] .nav-logo {
    flex-direction: row-reverse;
}

[dir="rtl"] .content-main ul {
    margin-left: 0;
    margin-right: 1.5rem;
}

[dir="rtl"] .video-detail-meta {
    flex-direction: row-reverse;
}

[dir="rtl"] .legal-content ul {
    margin-left: 0;
    margin-right: 1.5rem;
}