Do you have Firebug for Firefox? It's a webdev extension for Firefox, when installed you can rightclick in/on the footer and inspect the element. It will then report the applied css in a seperate part of your screen, also showing the css file where this css is defined. That way you know exactly where and what to edit.
Regards Robin
Board member, eZ Publish Community Project Board - Member of the share.ez.no team - Key values: Openness and Innovation.