Interactive card details form

I'm not happy with the result at all. While all the fields can be filled out, the validations are not working as expected. Initially, the form cannot be submitted if the fields are empty, but the error messages don't disappear when they're filled. Additionally, I couldn't implement a validation for the expiration date. I could use a similar approach as the card number validation, but that would mean repeating the previous validation. If someone could take a look at my solution, I would appreciate it.