[Theme: Flat-sky] Changing Font Sizes

Hello,

I have just installed Flat-sky and have been looking for the font size of the Menu that appears in the left column as well as the Tagline font size. I’ve looked and looked and have tried changing many of the font sized in the Editor but still can’t find it. Can someone help please?

Here’s the site: https://1pnt7.com/wp/

I need to make Coming on Strong! bigger And Menu items (e.g., 1.7, Koffee 2.0)

Thank you!