Hi Akullander!
Initially, I haven’t created separate options for the font sizes in the Theme Options panel in order to keep the typographic balance of the theme (the default sizes have not been picked at random ;)). However, since I’ve gotten several support tickets on this issue, I think I will include the option to change the font sizes of body text and headings in the Theme Options panel in the upcoming theme update.
Since font sizes are set both in the main style.css file and the lessframework.css file (which is responsible for adjusting the website elements on smartphone and tablet screens), you may need to add the !important declaration to make your css statements work, e.g.
.normal, body, input, blockquote { font-size: 14px !important; }
Sincerely,
Andrew | Satori