body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #2c3e50; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; }
        h2 { color: #e74c3c; margin-top: 30px; }
        h3 { color: #3498db; }
        .logo { font-size: 2.5em; font-weight: bold; color: #e74c3c; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        .nav { background: #2c3e50; padding: 15px; position: sticky; top: 0; z-index: 100; }
        .nav a { color: white; margin: 0 15px; text-decoration: none; }
        .mobile-toggle { display: none; background: #e74c3c; color: white; border: none; padding: 10px; }
        .btn { display: inline-block; background: #e74c3c; color: white; padding: 12px 25px; margin: 15px 0; border-radius: 5px; text-decoration: none; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        @media (max-width: 768px) {
            .nav { display: none; }
            .nav.active { display: block; }
            .mobile-toggle { display: block; }
        }