body { font-family: 'Arial', sans-serif; line-height: 1.6; margin: 0; padding: 0; color: #333; background-color: #f5f5f5; }
        .container { max-width: 1200px; margin: 0 auto; padding: 20px; }
        header { background-color: #1a3e8c; color: white; padding: 15px 0; position: relative; }
        .logo { font-size: 28px; font-weight: bold; text-align: center; }
        .logo span { color: #ffcc00; }
        nav { display: flex; justify-content: center; gap: 20px; margin-top: 10px; }
        nav a { color: white; text-decoration: none; font-weight: 500; }
        .mobile-menu-btn { display: none; position: absolute; top: 15px; right: 20px; background: none; border: none; color: white; font-size: 24px; cursor: pointer; }
        h1 { color: #1a3e8c; text-align: center; margin-bottom: 30px; }
        h2 { color: #2c52b2; margin-top: 40px; border-bottom: 2px solid #ffcc00; padding-bottom: 5px; }
        h3 { color: #3a6bd3; margin-top: 30px; }
        .download-btn, .login-btn { display: inline-block; background-color: #4CAF50; color: white; padding: 12px 25px; text-align: center; text-decoration: none; font-size: 16px; margin: 20px 0; border-radius: 5px; cursor: pointer; }
        .login-btn { background-color: #2196F3; }
        .image-container { text-align: center; margin: 30px 0; }
        img { max-width: 100%; height: auto; border-radius: 8px; }
        .table-container { overflow-x: auto; margin: 20px 0; }
        table { width: 100%; border-collapse: collapse; margin: 25px 0; font-size: 0.9em; }
        th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; }
        th { background-color: #1a3e8c; color: white; }
        tr:hover { background-color: #f1f1f1; }
        .tags { margin: 30px 0; }
        .tag { display: inline-block; background-color: #e0e0e0; color: #333; padding: 5px 10px; margin-right: 5px; margin-bottom: 5px; border-radius: 3px; text-decoration: none; }
        footer { background-color: #333; color: white; text-align: center; padding: 20px 0; margin-top: 50px; }
        @media (max-width: 768px) {
            nav { flex-direction: column; align-items: center; display: none; }
            nav.active { display: flex; }
            .mobile-menu-btn { display: block; }
            .logo { font-size: 24px; }
            h1 { font-size: 28px; }
            h2 { font-size: 24px; }
        }