How do i limit the rotation of a game object in relation to a free following camera ?

hello, i'm trying to make a following camera script, but i don't know how to limit the maximum rotation to the gameobject it is following.

to be more clear here is an example :

no rotation in relation to camera ( ideal state ) :

180°-ish of rotation in relation to camera (very not ideal state) :

to be clear i know about making the camera a child of the gameobject, but that is too fixed, i want a little response to turning and ascending/descending, of couse with a limit of rotation (someting like -75° to 75° in relation to the y axis of the camera) .

here is the following camera script :

 public class CameraScript : MonoBehaviour {
 
     Transform playerTrs;
     Quaternion targetLook;
     Vector3 targetMove;
     public float smoothLook = 0.9F;
     public float smoothMove = 0.5F;
     Vector3 smoothMoveV;
     public float camDist = 17;
     public float camHeight = 4;
     public float lookAngle = 5;
     
     void Start () {
         playerTrs = GameObject.FindWithTag ("Player").transform; 
     }
     
 
     void Update () {
     
         targetMove = playerTrs.position + (playerTrs.rotation * new Vector3 (0, camHeight, camDist));
         //transform.position = Vector3.Lerp (transform.position,targetMove,smoothMove * Time.deltaTime);
         transform.position = Vector3.SmoothDamp (transform.position, targetMove, ref smoothMoveV, smoothMove);
 
         targetLook = Quaternion.LookRotation (playerTrs.position - transform.position + new Vector3 (0,lookAngle,0));
         transform.rotation = Quaternion.Lerp (transform.rotation, targetLook, smoothLook * Time.deltaTime); 
         //transform.LookAt (playerTrs);
     }
 }