How can I adjust button and header size for mobile viewing only?

Store Design
1

I have a slideshow and I want to change the header size, button size, and button text size on mobile only

2

would other buttons be the original size? so that the change would effect the slideshow only?

3

Hi @haleygray16
Can you kindly share your store link (with the password, if any) with us? We will check it and suggest you a solution if possible.