body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 20px; color: #333; }
        h1 { color: #e74c3c; border-bottom: 3px solid #f39c12; padding-bottom: 10px; }
        h2 { color: #2980b9; margin-top: 30px; }
        h3 { color: #27ae60; }
        .download-btn { background: #e74c3c; color: white; padding: 12px 25px; border-radius: 5px; display: inline-block; margin: 15px 0; }
        .login-btn { background: #2980b9; color: white; padding: 12px 25px; border-radius: 5px; display: inline-block; margin: 15px 0; }
        .nav-mobile { display: none; background: #333; color: white; padding: 10px; text-align: center; cursor: pointer; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .nav-mobile { display: block; }
        }
        img { max-width: 100%; height: auto; margin: 20px 0; }