Classes only visible on phone?

I want to create a class only visible to phone
Whenever i try to do something on phone it changes on desktop version and it bothers me, can i create a class so it can only be visible on phone or any other way?

Here is my public share link: LINK
(how to access public share link)

Classes are assigned to elements not breakpoints. Styles can be.

So how do i make a style thats only visible for mobile

By only setting styles on the mobile breakpoint. There is a page in the Webflow University that I recommend you review if you haven’t.
It should help you resolve your issue.