body { margin: 0; font-family: Arial; }
        .container { display: flex; justify-content: center; align-items: flex-start; }
        .main-content { flex: 1; max-width: 600px; padding: 20px; }
        .spacer { width: 20px; }
        .sidebar { width: 300px; background-color: #f9f9f9; padding: 10px; }
        table.banner { width: 100%; background-color: #f2f2f2; text-align: center; margin-bottom: 20px; }
        table.banner img { height: 80px; }
        table.banner h1 { margin: 0; font-size: 24px; color: #333; }
        form label { display: block; margin-top: 10px; font-weight: bold; text-align: left; }
        form input, form select, form textarea { width: 100%; padding: 8px; margin-top: 5px; }
        iframe { width: 100%; height: 600px; border: none; }
        h3 { margin-top: 20px; color: #444; }