Change Font For Page Titles?

Hi!

How do I change the font for the pages names on my website? If you go to my website (www.jauntberry.com), you will see I have page names on the top bar called “Stuff To Do”, “Food”, “Gear”, etc. Can I change the font of these (style & size)?

Please note that I am still new to coding, etc.

Thanks for any help!

Tim