@andreearadacina21
Unfortunately, this is not the answer to my question.
I meant a situation in which someone fills out a form, does not enter a value into the required field and presses add to cart. Then the field should light up red, e.g. with a red border.
At the moment the only information that the customer has that he made a mistake is a woocmerca error, which is not so expressive.
Is it possible to add a red border to a field when a customer does not fill in the required field and press add to cart?