body { font-family: 'Arial', sans-serif; line-height: 1.6; max-width: 1200px; margin: 0 auto; padding: 20px; color: #333; }
        .logo { font-size: 2.5em; font-weight: bold; color: #FF5722; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); }
        nav { background: #FFEB3B; padding: 10px; border-radius: 5px; margin-bottom: 20px; }
        nav a { margin: 0 15px; text-decoration: none; color: #333; font-weight: bold; }
        .mobile-nav { display: none; }
        h1 { color: #FF5722; border-bottom: 2px solid #FFEB3B; padding-bottom: 10px; }
        h2 { color: #4CAF50; margin-top: 30px; }
        h3 { color: #2196F3; }
        .download-btn { background: #4CAF50; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 0; }
        .login-btn { background: #2196F3; color: white; padding: 10px 20px; border-radius: 5px; text-decoration: none; display: inline-block; margin: 15px 0; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        footer { margin-top: 40px; padding: 20px; background: #f5f5f5; border-radius: 5px; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; text-align: center; padding: 10px; background: #FFEB3B; }
            .mobile-menu { display: none; }
            .show-menu { display: block; }
        }