Unity First Person Camera Controller

CameraController.cs

using UnityEngine;

public class CameraController : MonoBehaviour
{
    [SerializeField] private float _sensitivity = 3;
    [SerializeField] private float _maxAngle = 80;
    [SerializeField] private float _minAngle = -80;
    [SerializeField] private Transform _horizontalRotation;
    [SerializeField] private Transform _verticalRotation;

    private Vector2 currentRotation;

    void Update()
    {
        currentRotation = new Vector2(currentRotation.x + Input.GetAxis("Mouse X") * _sensitivity, Mathf.Clamp(currentRotation.y + Input.GetAxis("Mouse Y") * _sensitivity, _minAngle, _maxAngle));
        _horizontalRotation.localRotation = Quaternion.Euler(_horizontalRotation.localEulerAngles.x, currentRotation.x, _horizontalRotation.localEulerAngles.z);
        _verticalRotation.localRotation = Quaternion.Euler(-currentRotation.y, _verticalRotation.localEulerAngles.y, _verticalRotation.localEulerAngles.z);
    }
}