Spining gameObjects using eulerangles not working as intended

Hello, I'm trying to turn two different gameObjects: a tank turret around the Y-axis (horizontally) and its barrel around the X-axis (vertically) by adding both of them the following script:

 [System.Serializable]
 public class Properties
 {
      public Limit horizontalLimit = new Limit(Vector2.zero);
      public Limit verticalLimit = new Limit(Vector2.zero);
      public float speed = 0f;
 }
 public Properties properties;

(Turret's spins between [-360, 360] degrees horizontally and [0, 0] vertically and barrel, for example, between [-25, 40] degrees vertically and [0,0] horizontally)

What I have done is this method which is called in Update() one:

 private void Rotate()
 {
     float mouseX = Input.GetAxis("Mouse X");
     float mouseY = Input.GetAxis("Mouse Y");

     mouseX = Mathf.Clamp(mouseX, properties.horizontalLimit.min, properties.horizontalLimit.max);
     mouseY = Mathf.Clamp(mouseY, properties.verticalLimit.min, properties.verticalLimit.max);

     gameObject.transform.Rotate(new Vector3(mouseY, mouseX, 0) * Time.deltaTime * properties.speed);
 }

When placing running the scene the tank turret rotates perfectly and smoothly. However the tank's behaves oddly: barrel rotates around the X-axis without limits even beign clamped between a min and a max.

I've been investigating and the problem might me the Gimbal lock effect due to the use of euler angles. So I changed Rotate() method using Quaternions instead. As I'm quite new into rotations my new Rotation() method is not working properly, can you help me?

 private void Rotate()
     {        
         // Aiming point
         Vector3 direction = Input.mousePosition - gameObject.transform.position;
 
         // Rotation quaternion
         Quaternion rotation = Quaternion.LookRotation(direction);
         Vector3 eulers = rotation.eulerAngles;
 
         // Clamp the rotation to its limits
         Mathf.Clamp(eulers.x, properties.verticalLimit.min, properties.verticalLimit.max);
         Mathf.Clamp(eulers.y, properties.horizontalLimit.min, properties.horizontalLimit.max);
 
         // Perform the rotation smoothly
         gameObject.transform.Rotate(gameObject.transform.up * properties.speed * Time.deltaTime, eulers.y);
         gameObject.transform.Rotate(gameObject.transform.right * properties.speed * Time.deltaTime, eulers.x);
 }

Cheers, Héctor