body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FFD700; text-align: center; border-bottom: 3px solid #FF8C00; padding-bottom: 10px; }
        h2 { color: #FF8C00; border-left: 4px solid #FFD700; padding-left: 10px; }
        h3 { color: #4CAF50; }
        .nav { background: #333; color: white; padding: 15px; display: flex; justify-content: space-between; align-items: center; }
        .nav-links { display: flex; gap: 20px; }
        .nav-links a { color: white; text-decoration: none; }
        .mobile-nav { display: none; }
        .download-btn, .login-btn { background: #4CAF50; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 10px 0; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .footer { background: #333; color: white; padding: 20px; text-align: center; margin-top: 30px; }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .mobile-nav { display: block; }
        }