Custom CSS skewing /blog/ page mobile heading text

Hey there,

I added some custom CSS across my site that I think might be skewing how headings look on mobile for my /blog/ page.

The CSS I added:

	h2,h3,h4 {
  padding-top: 20px;
  padding-bottom: 20px;

I want the above CSS to apply across my site and not have to use Simple CSS on a per page basis, so not sure if there is some custom CSS that could be added to the /blog/ page specifically to resolve the issue on mobile?

Thanks