body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; background: #2c3e50; color: white; padding: 10px; text-align: center; cursor: pointer; }
        nav { background: #2c3e50; padding: 15px 0; }
        nav ul { list-style: none; display: flex; justify-content: center; margin: 0; }
        nav li { margin: 0 15px; }
        nav a { color: white; text-decoration: none; font-weight: bold; }
        .logo { font-size: 24px; text-transform: uppercase; letter-spacing: 2px; }
        h1 { color: #e74c3c; text-align: center; border-bottom: 2px solid #eee; padding-bottom: 10px; }
        h2 { color: #3498db; margin-top: 30px; }
        h3 { color: #2ecc71; }
        .btn { display: inline-block; background: #e74c3c; color: white; padding: 10px 20px; margin: 10px 0; border-radius: 5px; text-decoration: none; }
        .img-container { text-align: center; margin: 20px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
        th { background-color: #f2f2f2; }
        footer { background: #2c3e50; color: white; text-align: center; padding: 20px; margin-top: 40px; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; align-items: center; }
            .mobile-nav { display: block; }
            nav { display: none; }
            nav.active { display: block; }
        }