Layout Question Via CSS

[knuckle-101]

Usually do not post for layout questions but this has got me really twisted.

I am working on this theme bought by a customer who purchased elsewhere but for the life of me cannot figure out what controls the center section to widen it.

If anyone can see something I dont please reply with an answer, your help will be greatly appreciated.

I have attached the css file along with the temp address for visual view

I already edited the main line to widen the look but the middle likes to stay left, I am sure it is a float command but not sure which one and tried everything I know or read about to chnage it to make it recenter.

here is the address to see it Web Address

Thanks in advance