body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .logo { font-size: 2rem; font-weight: bold; color: #0066cc; margin-bottom: 20px; text-align: center; }
        nav { background: #0066cc; padding: 10px; display: flex; justify-content: space-around; flex-wrap: wrap; }
        nav a { color: white; text-decoration: none; padding: 5px 10px; }
        .mobile-menu { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-menu { display: block; background: #0066cc; color: white; padding: 10px; text-align: center; cursor: pointer; }
            nav { flex-direction: column; }
        }
        h1 { color: #0066cc; border-bottom: 2px solid #0066cc; padding-bottom: 10px; }
        h2 { color: #339966; margin-top: 30px; }
        h3 { color: #663399; }
        .download-btn, .login-btn { display: inline-block; background: #ff6600; color: white; padding: 10px 20px; margin: 10px 0; border-radius: 5px; text-decoration: none; font-weight: bold; }
        .image-container { text-align: center; margin: 20px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .table-container { overflow-x: auto; margin: 20px 0; }
        table { width: 100%; border-collapse: collapse; }
        th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
        th { background: #f2f2f2; }
        .tags { margin: 20px 0; }
        .tag { background: #e0e0e0; padding: 5px 10px; margin: 5px; display: inline-block; border-radius: 20px; }
        footer { margin-top: 50px; padding: 20px; background: #f2f2f2; text-align: center; }