Responsive contact form

Hello there.

I have a problem on my newsletter form. When you try to subscribe my websites newsletter, on mobile, the form is not responsive, as you can see on the image (https://imgur.com/a/3pZmYhh). Even the scroll doesn’t work, and you can’t see the fields to write. Can you help please? Here’s the page link if you want to check it out: https://www.oksofas.pt/newsletter-oksofas/

Thank you.

Ticket