Boxed Layout Not Appealing

Hi, this is not so much for UF builder as it is for the UF theme.

How do I get rid of the white space that users can scroll to, all the way to the right of the screen? This could be potentially ugly to whoever notices this huge mass of white space that has no purpose or function? Is there a way I can reduce this white space to the right of my layout or would I have to change my whole layout? I don't have much time till I see my client, so would appreciate it if I could get this fixed before tomorrow's meeting.

I also noticed that the header and content sections are boxed, while the footer and the CTA (call-to-action) are 100% wide. How do I make my current layout 100% wide without affecting the order of things such as the (already) perfect nav menu?