body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #2c3e50; }
        h1 { font-size: 2.2em; border-bottom: 3px solid #e74c3c; padding-bottom: 10px; }
        h2 { font-size: 1.8em; margin-top: 30px; }
        h3 { font-size: 1.5em; color: #e67e22; }
        .download-btn, .login-btn { display: inline-block; padding: 12px 25px; margin: 15px 0; background: #e74c3c; color: white; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .download-btn:hover, .login-btn:hover { background: #c0392b; }
        .nav-toggle { display: none; cursor: pointer; font-size: 24px; position: absolute; right: 20px; top: 20px; }
        .image-container { text-align: center; margin: 25px 0; }
        .image-container img { max-width: 100%; height: auto; border-radius: 8px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .nav-toggle { display: block; }
            .mobile-nav.active { display: block; }
            body { padding: 10px; }
        }