main-rollup.css: Where are these definitions?

This is driving me insane.

I'm trying to get rid of the blue border around the controls blocks. Like a good little debugger, I'm using Firebug to try and sort my way through the stylevars.



After hunting through css, stylevars, templates, and a couple of beer bottles (the answer was not in them, but I felt better for checking) I found that the CSS is ,blockbody .formcontrols .blockrow.



For the life of me, I can't find this statement anywhere. Where is this border defined, and how do I go about getting rid of it?

Cheers!