transform.eulerAngles + transform.Rotate not working sync

Quick question, I have a simple kite going up and rotating as it goes up (to always face the handler). More, I use left and right arrows to change angle, so it can move left and right. Here is my Update() // Kite height float currentHeight = transform.position.y; // Kite angle fct of kite height float kiteAngle = Mathf.Asin(currentHeight / lineLength) * Mathf.Rad2Deg;

         // Move Left and Right
         transform.Rotate(0, 0, 250 * Input.GetAxis("Horizontal") * Time.deltaTime);
 
         if ( kiteAngle < 89 && transform.position.y < lineLength && transform.position.z > 0)
         {
             // Simulate Wind
             transform.Translate(0, windSpeed, 0);
             // Adjust kiteAngle
             transform.eulerAngles = Vector3.left * kiteAngle;
         }

But while my kite is entering the if clause, the "Move Left and Right" is not working. Any idea ? It seems that I can't transform eurlerAngles at the same time as Rotate, what is the clearest way to combine boths rotations ? Sorry if that's obvious, it's my first script :)