body { font-family: 'Arial', sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; background: #0066cc; color: white; padding: 10px; text-align: center; cursor: pointer; }
        .desktop-nav { display: flex; justify-content: space-between; align-items: center; padding: 15px 0; border-bottom: 2px solid #ff9900; }
        .logo { font-size: 28px; font-weight: bold; color: #ff6600; text-transform: uppercase; }
        nav a { margin: 0 15px; text-decoration: none; color: #0066cc; font-weight: bold; }
        h1 { color: #0066cc; border-bottom: 3px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #ff6600; margin: 25px 0 15px; }
        h3 { color: #009933; margin: 20px 0 10px; }
        .download-btn, .login-btn { display: inline-block; background: #009933; color: white; padding: 12px 25px; margin: 15px 0; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .img-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; border: 2px solid #ddd; }
        .tag { background: #f0f0f0; padding: 5px 10px; margin: 5px; border-radius: 3px; display: inline-block; }
        footer { margin-top: 40px; padding: 20px 0; border-top: 2px solid #ddd; text-align: center; }
        @media (max-width: 768px) {
            .desktop-nav { flex-direction: column; display: none; }
            .mobile-nav { display: block; }
            body { padding: 10px; }
        }