Container width is blowing out

[CaseyU]

The width of the bottom portion of my container is blowing out to the full screen width for some odd reason, and I can't seem to locate the code where it's occurring. It is only happening on the category pages, so I would assume it's there somewhere...

Attached photos show what it should look like (chocolate brown lined up with the lighter color) versus what the category pages are doing (chocolate brown full screen width)

Any idea on where and how to fix this? I'm not a coder, so any help is SO appreciated!

[lorenzo]

you can fix this in the default.css

[CaseyU]

you can fix this in the default.css

I have been looking in the code -- but can't see where (or how) to fix it. I can't wrap my head around it -- the code appears the same as on the home page, which doesn't have this issue. It's only on the category pages...?