Need Guidance in CSS

I am really new to CSS so bear with me if ever I am really bad at it even if it is a very simple matter.

I have downloaded a template from HTML5 UP but the css for hover box effect and the font style in it are not in the style.css and I don't know how to find it.

Link for the template: http://html5up.net/astral

Images for what I mean the problem is:
http://i.share.pho.to/fbe4ba3f_o.png
http://i.share.pho.to/737d1b7d_o.png