body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { background-color: #1a73e8; color: white; padding: 20px; text-align: center; }
        nav { display: flex; justify-content: space-around; margin: 10px 0; }
        nav a { color: white; text-decoration: none; }
        .mobile-nav-toggle { display: none; background: #0d47a1; color: white; border: none; padding: 10px; }
        h1 { color: #1a73e8; border-bottom: 2px solid #1a73e8; padding-bottom: 10px; }
        h2 { color: #0d47a1; margin-top: 30px; }
        h3 { color: #01579b; }
        .download-btn, .login-btn { background-color: #4caf50; color: white; padding: 10px 20px; text-decoration: none; display: inline-block; margin: 10px 0; }
        .image-container { text-align: center; margin: 20px 0; }
        img { max-width: 100%; height: auto; }
        footer { background-color: #333; color: white; padding: 20px; text-align: center; margin-top: 30px; }
        @media (max-width: 768px) {
            .mobile-nav-toggle { display: block; }
            nav { display: none; flex-direction: column; }
            nav.active { display: flex; }
            body { padding: 10px; }
        }