body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; background: #2c3e50; color: white; padding: 10px; text-align: center; }
            .toggle-btn { background: #e74c3c; border: none; color: white; padding: 8px 15px; cursor: pointer; }
        }
        h1 { color: #e74c3c; text-align: center; }
        h2 { color: #2c3e50; border-bottom: 2px solid #e74c3c; padding-bottom: 5px; }
        h3 { color: #3498db; }
        .download-btn, .login-btn { display: inline-block; padding: 10px 20px; margin: 10px 0; background: #2ecc71; color: white; text-decoration: none; border-radius: 5px; }
        .login-btn { background: #3498db; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tags { margin: 20px 0; }
        .tag { background: #95a5a6; color: white; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 3px; }
        footer { margin-top: 30px; padding: 20px; background: #2c3e50; color: white; text-align: center; }