Change font in Easyshop

I am looking for the best way to change the default font in Easyshop.

Ideally, it would automatically match that of the rest of my Joomla site, where the font is set using Google Open Fonts, using template settings.

If this isn't possible, what is the best way to change the font in Easyshop, perhaps using CSS, so that it is the same as the rest of the site?

Thanks in advance.