Zurb Foundation template resize issue

I am building a personal site using a Zurb Foundation template (blog) and I have a resize issue. Basically, I wanted to make it responsive but I guess I messed it up along the way. I placed the footer in a larger container, and on resize it’s not positioned where it should.

If anyone could help me keep it down, in order to have the content naturally expand in between the sidebar and footer, I would be grateful.

Here it is:


PS: the problem in question is visible on low resolution.

Can you download the Foundation again and compare yours with the source?