Trying to fix my movement after the camera broke it.

I am using the cinemachine camera and after I changed the line of code from .GetAxis from Horizontal to mouse X the character moves with the camera on the x axis. (Obviously lol). I wanted to make it akin to Resident Evil 4 where the camera moves left and right a little before the character makes a 45 degree turn.

Below is the code I am using.

 using UnityEngine;
 
  public class PlayerMovement : MonoBehaviour
  {
      private CharacterController characterController;
      private Animator animator;
  
      [SerializeField]
      private float forwardMoveSpeed = 3;
      [SerializeField]
      private float backwardsMoveSpeed = 2;
      [SerializeField]
      private float turnSpeed = 150f;
  
      private void Awake()
      {
          characterController = GetComponent<CharacterController>();
          animator = GetComponentInChildren<Animator>();
  
          Cursor.lockState = CursorLockMode.Locked; //reccomend adding toggle
      }
  
      private void Update()
      {
          var horizontal = Input.GetAxis("Mouse X");
          var vertical = Input.GetAxis("Vertical");
  
          var movement = new Vector3(horizontal, 0, vertical);
  
          animator.SetFloat("Speed", vertical);
  
          transform.Rotate(Vector3.up, horizontal * turnSpeed * Time.deltaTime);
  
          if (vertical != 0)
          {
              float moveSpeedToUse = (vertical > 0) ? forwardMoveSpeed : backwardsMoveSpeed;
              characterController.SimpleMove(transform.forward * moveSpeedToUse * vertical);
          }
  
      }
  }

and here is my camera controller script

  using Cinemachine;
  using UnityEngine;
  
  public class CameraController : MonoBehaviour
  {
      private CinemachineComposer composer;
  
      [SerializeField]
      private float sensitivity = 1f;
  
      private void Start()
      {
          composer = GetComponent<CinemachineVirtualCamera>().GetCinemachineComponent<CinemachineComposer>();
      }
  
      private void Update()
      {
          float vertical = Input.GetAxis("Mouse Y") * sensitivity;
          composer.m_TrackedObjectOffset.y += vertical;
          composer.m_TrackedObjectOffset.y = Mathf.Clamp(composer.m_TrackedObjectOffset.y, -10, 10);
      }
  }