My question, however, is how can I find what all those css classes are called. In other words, from which less/css file is Gantry loading the default font-related classes and styles. I need to find all those classes so that I can override them with my customized "rt_stratos-custom.css
Answer:
Firebug or devtools of your choice ...
see also
www.rockettheme.com/blog/coding/1767-bas...omizing-with-lesscss