body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        h1 { color: #0a527a; text-align: center; }
        h2 { color: #1e73be; margin-top: 30px; }
        h3 { color: #2980b9; }
        .logo { font-size: 28px; font-weight: bold; color: #0a527a; text-align: center; margin: 20px 0; }
        .nav { background: #f8f9fa; padding: 10px; display: flex; justify-content: center; flex-wrap: wrap; }
        .nav a { margin: 0 15px; text-decoration: none; color: #0a527a; font-weight: 500; }
        .mobile-nav-btn { display: none; position: fixed; bottom: 20px; right: 20px; background: #1e73be; color: white; border: none; padding: 10px 15px; border-radius: 5px; }
        .download-btn, .login-btn { display: inline-block; background: #27ae60; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; }
        .login-btn { background: #3498db; }
        img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
        .tags { margin: 20px 0; }
        .tags a { background: #f1f1f1; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 4px; }
        footer { margin-top: 50px; padding: 20px; background: #f8f9fa; text-align: center; }
        @media (max-width: 768px) {
            .nav { flex-direction: column; align-items: center; display: none; }
            .nav.active { display: flex; }
            .mobile-nav-btn { display: block; }
        }