I can’t tell because you have the CSS minified which puts it all on one line — so Firebug just shows line 2 for all CSS. Turn off minified and use Firebug to look at it, or use search on the CSS files.
Or post on studiopress’s forums — as they support their own commercial themes.
All right. I turned off minified, but I don’t use Firefox as my browser, which looks like is a necessary requirement for firebug. I’m still searching all these different codes and not finding that one. I’m in the “Editor” looking for it and it’s not coming up.