Floating Social - Editing Javascript? or CSS?

I am working on a site, http://www.whatshotandnot.com/27/tester/ , that uses the Floating Social plugin. As of now, I have it setup so that it's "selected" to the left of the .post-thumbnail.

However, when scrolling down, the bar hits the top of the page. Is there a way to create a margin-top:15px? So that the social bar doesn't hit the top?

Secondly, is there a way to make it so that the bar does NOT extend into the footer? I would like to scroll down but have it stop at the footer.

thanks!