How to edit size of text field?

Hi I wish to know if we are able to shorten the size of the text field on contact form 7. The alignment of the text field seems to be jutting out on the mobile view of my page and it makes some of the other elements misaligned.

You can see the page here: https://ariumclinic.com/book-online/

I wish to make the text fields slightly shorter.

The page I need help with: [log in to see the link]