body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; }
            .toggle-nav { padding: 10px; background: #1a73e8; color: white; cursor: pointer; }
        }
        nav { background: #1a73e8; padding: 15px; }
        nav a { color: white; text-decoration: none; margin: 0 15px; font-weight: bold; }
        h1 { color: #1a73e8; border-bottom: 2px solid #ff9800; }
        h2 { color: #ff9800; }
        h3 { color: #4caf50; }
        .btn { display: inline-block; padding: 10px 20px; background: #ff9800; color: white; text-decoration: none; margin: 10px 0; border-radius: 5px; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        footer { background: #333; color: white; padding: 20px; text-align: center; }