In the style.css file, at the top, there should be an “import” line. Just underneath it place this line:

@import "font-url-here";

If you’re using a google font, place the url that google gives you in there. For Open Sans it would look like this:

@import "http://fonts.googleapis.com/css?family=Open+Sans";

After that you can change the body font to the font family that google gives you 🙂