body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #FF5722; text-align: center; }
        h2 { color: #4CAF50; border-bottom: 2px solid #4CAF50; padding-bottom: 5px; }
        h3 { color: #2196F3; }
        .logo { font-size: 28px; font-weight: bold; color: #FF5722; text-align: center; margin: 20px 0; }
        .nav { background-color: #333; overflow: hidden; }
        .nav a { float: left; display: block; color: white; text-align: center; padding: 14px 16px; text-decoration: none; }
        .nav a:hover { background-color: #ddd; color: black; }
        .mobile-nav { display: none; }
        .download-btn { background-color: #4CAF50; color: white; padding: 15px 30px; text-align: center; display: inline-block; margin: 20px 0; border-radius: 5px; }
        .login-btn { background-color: #2196F3; color: white; padding: 15px 30px; text-align: center; display: inline-block; margin: 20px 10px; border-radius: 5px; }
        .img-container { text-align: center; margin: 20px 0; }
        img { max-width: 100%; height: auto; }
        @media screen and (max-width: 768px) {
            .nav a { float: none; display: block; text-align: left; }
            .mobile-nav { display: block; background-color: #333; color: white; text-align: center; padding: 10px; cursor: pointer; }
        }