Twenty Twelve three column footer css

Hi,
I created a child theme for Twenty Twelve theme and added a three-column footer with css. It looks correct on the Home page (http://lisawerness.com/), but is not displaying correctly on other pages (example http://lisawerness.com/embodiment-classes/).

I would also like to add a color box around the “Recent Posts” widget area on the sidebar: http://lisawerness.com/blog/

Thank you! I appreciate your help.