Diagonal movement faster speed help plz

Unity Engine
1

I know the function VectorLength but I dont know where to apply it in this code, can someone help me?

public class CC : MonoBehaviour
{

    public float walkSpeed = 6.0f;
    public float runSpeed = 12.0f;
    public float jumpSpeed = 8.0f;
    public float gravity = 20.0f;

    public CharacterController cc;
    private Vector3 move = Vector3.zero;

    public Camera cam;
    public float mouseH = 3.0f;
    public float mouseV = 2.0f;
    public float minRot = -65.0f;
    public float maxRot = 60.0f;

    float h_mouse, v_mouse;
    // Start is called before the first frame update
    void Start()
    {
        Cursor.lockState = CursorLockMode.Locked;
    }

    // Update is called once per frame
    void Update()
    {
        h_mouse = mouseH * Input.GetAxis("Mouse X");
        v_mouse += mouseV * Input.GetAxis("Mouse Y");

        v_mouse = Mathf.Clamp(v_mouse, minRot, maxRot);

        cam.transform.localEulerAngles = new Vector3(-v_mouse, 0, 0);
        transform.Rotate(0, h_mouse, 0);
      

        if (cc.isGrounded)
        {
            move = new Vector3(Input.GetAxis("Horizontal"), 0.0f, Input.GetAxis("Vertical"));

            if (Input.GetKey(KeyCode.LeftShift))
            {
                move = transform.TransformDirection(move) * runSpeed;
            } else
            {
                move = transform.TransformDirection(move) * walkSpeed;
            }

            if (Input.GetKey(KeyCode.Space))
            {
                move.y = jumpSpeed;
            }
            }
        move.y -= gravity * Time.deltaTime;


        cc.Move(move * Time.deltaTime);
    }
}
2

Row 40:
You get direction based on user input. When no keys down you get length of 0 for your direction vector. When one key down you get length of one - sqrt(1). Two keys down - you get lenght of sqrt(2)
You need to Clamp length of your vector to one and in you cases you will get such a result:
No keys down - length is 0
Any key down - length is 1

Docs for solution:

Solution:
Change code on row 40 to this:

move = new Vector3(Input.GetAxis(“Horizontal”), 0.0f, Input.GetAxis(“Vertical”));
move = Vector3.ClampMagnitude(move);