body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1, h2, h3 { color: #FF9900; margin-top: 30px; }
        h1 { font-size: 2.2em; }
        h2 { font-size: 1.8em; }
        h3 { font-size: 1.5em; }
        .logo { font-size: 2.5em; font-weight: bold; color: #FF6600; text-align: center; margin: 20px 0; }
        .nav { background: #333; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        .nav a { color: white; text-decoration: none; padding: 5px 10px; }
        .mobile-nav-btn { display: none; background: #FF6600; color: white; border: none; padding: 10px; cursor: pointer; }
        .content { margin-top: 20px; }
        .highlight { background: #FFF3E0; padding: 10px; border-radius: 5px; }
        .download-btn, .login-btn { background: #4CAF50; color: white; padding: 12px 20px; margin: 15px 0; display: inline-block; border-radius: 5px; text-decoration: none; }
        .login-btn { background: #2196F3; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .footer { margin-top: 40px; padding: 20px; background: #333; color: white; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; display: none; }
            .nav.active { display: flex; }
            .mobile-nav-btn { display: block; }
            h1 { font-size: 1.8em; }
        }