Help finding CSS problem

[JacobBushnell]

Hello, I am having trouble finding this problem with my style sheet.

It looks fine when the browser is large but when the right side is pulled in the background behind the content gets replaced with the background of the page:
Please see the attached example.

the page is located at dev.keystonepestsolutions.com

the colors are purposely messed up so I can see where each style is applied.

I have been going thought the CSS and I think the file in question is stylesheet_new.css but I haven not been able to find the offending style.

Thank you,

Jacob