body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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; }
        nav { background: #0066cc; padding: 15px; display: flex; justify-content: space-between; align-items: center; }
        nav a { color: white; text-decoration: none; margin: 0 10px; font-weight: bold; }
        .logo { font-size: 24px; letter-spacing: 2px; }
        h1 { color: #003366; border-bottom: 3px solid #ff9900; padding-bottom: 10px; }
        h2 { color: #0066cc; margin-top: 30px; }
        h3 { color: #339966; }
        .download-btn, .login-btn { background: #ff9900; color: white; padding: 12px 25px; border-radius: 5px; display: inline-block; margin: 15px 0; text-decoration: none; font-weight: bold; }
        .img-container { text-align: center; margin: 25px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .tag { background: #e0e0e0; padding: 5px 10px; margin: 5px; border-radius: 15px; display: inline-block; }
        footer { margin-top: 50px; padding: 20px; background: #f5f5f5; border-top: 2px solid #ddd; }
        @media (max-width: 768px) {
            nav { flex-direction: column; }
            .mobile-nav { display: block; }
            .desktop-nav { display: none; }
            body { padding: 10px; }
        }