Change font to inherit from parent

Hi, I use “Open sans, sans-serif” for my site but the heading for the UM login and register form calls for “Lato” font and it’s set as !important.

How do I disable that?

Also, I’m inspecting my form with google dev tools but are there any others that I might’ve missed? I’d like to have all of UM use only Open sans.

Thanks!

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