fps movement limited horizontal and vertical both

hii guys .. i want to make a like my solder stand and fire a MG .. its a defendre game and i want to he can shoot a limited area he cant turn around so plz can anyone help me to clamp camera rotation horizontal and vertical m not good in scripting but here is my script sorry my english is very bad

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class mouselook : MonoBehaviour { public float sencivity;

 public Transform player;

 private float rot;
 private float rot2;

  
 

 private void Update()
 {
     float x = Input.GetAxis("Mouse X") * sencivity * Time.deltaTime;
     float y = Input.GetAxis("Mouse Y") * sencivity * Time.deltaTime;

     
     rot -= y;
  
     rot = Mathf.Clamp(rot, -40f, 15f);
     transform.localRotation = Quaternion.Euler(rot, 0f, 0f);

     
     player.Rotate(player.up * x);

     
 }

}