How to set up a min/max Local Z coordinate?

Hello, I've created a little script that I can move a camera with the mouse wheel on the local z coordinate. Now I want to limit how far the camera can move on the local z coordinate, can anyone help me?

         Vector3 posCam = CamTransform.InverseTransformPoint(CamTransform.position);
 
         float scroll = Input.GetAxis("Mouse ScrollWheel");
         posCam.z = scroll * 200f * scrollSpeed * Time.deltaTime;
 
         CamTransform.Translate(posCam);

Thanks! Greetings.