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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo a {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-menu a:hover {
    opacity: 0.8;
}

main {
    margin-top: 60px;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0;
    text-align: center;
}

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

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.play-btn {
    background: white;
    color: #667eea;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.3s;
}

.play-btn:hover {
    transform: scale(1.05);
}

section {
    padding: 60px 0;
}

section:nth-child(even) {
    background: white;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #333;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.video-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.video-card h3 {
    padding: 1rem;
    font-size: 1.2rem;
    color: #333;
}

.video-card p {
    padding: 0 1rem 1rem;
    color: #666;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.feature-card {
    display: flex;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.feature-card img {
    width: 200px;
    height: 100%;
    object-fit: cover;
}

.feature-content {
    padding: 2rem;
    flex: 1;
}

.feature-content h3 {
    margin-bottom: 1rem;
    color: #333;
}

.link-btn {
    display: inline-block;
    margin-top: 1rem;
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.episodes-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.episode-item {
    display: flex;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.episode-item img {
    width: 150px;
    height: 100px;
    object-fit: cover;
}

.episode-info {
    padding: 1.5rem;
    flex: 1;
}

.episode-tag {
    background: #667eea;
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.article-card h3 {
    margin-bottom: 1rem;
    color: #333;
}

.article-card p {
    color: #666;
    line-height: 1.8;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.related-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
}

.related-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.related-card h3 {
    padding: 1rem;
    color: #333;
}

.related-card p {
    padding: 0 1rem 1rem;
    color: #666;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: #666;
    line-height: 1.8;
}

footer {
    background: #2d3748;
    color: white;
    padding: 40px 0 20px;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section a {
    color: #cbd5e0;
    text-decoration: none;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
}

@media (max-width: 768px) {
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .feature-card {
        flex-direction: column;
    }
    
    .feature-card img {
        width: 100%;
        height: 200px;
    }
    
    .episode-item img {
        width: 100px;
    }
}