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: #1a5276; color: white; padding: 10px; text-align: center; cursor: pointer; }
        nav { background: #1a5276; padding: 15px 0; margin-bottom: 30px; }
        nav ul { list-style: none; padding: 0; margin: 0; display: flex; justify-content: center; }
        nav ul li { margin: 0 15px; }
        nav ul li a { color: white; text-decoration: none; font-weight: bold; }
        h1 { color: #e74c3c; text-align: center; margin-bottom: 10px; }
        h2 { color: #2980b9; border-bottom: 2px solid #3498db; padding-bottom: 5px; margin-top: 30px; }
        h3 { color: #27ae60; }
        .download-btn, .login-btn { display: inline-block; background: #2ecc71; color: white; padding: 12px 25px; margin: 15px 0; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .login-btn { background: #e67e22; }
        .feature-box { background: #f9f9f9; padding: 20px; margin: 20px 0; border-left: 4px solid #3498db; }
        img { max-width: 100%; height: auto; display: block; margin: 20px auto; }
        .tags { margin: 20px 0; }
        .tags a { background: #95a5a6; color: white; padding: 5px 10px; margin: 0 5px 5px 0; display: inline-block; border-radius: 3px; text-decoration: none; }
        footer { background: #34495e; color: white; padding: 20px; text-align: center; margin-top: 40px; }
        @media (max-width: 768px) {
            nav ul { flex-direction: column; align-items: center; }
            nav ul li { margin: 5px 0; }
            .mobile-nav { display: block; }
            nav { display: none; }
        }