Technical problem with technical documentation page

Hello everyone, I have been working a while on my documentation page now, but for some reason it doesn’t center align, can any one see whats wrong so I can fix it? Link:

I only see text-align:center; on your header s. Except for #maindoc header where you put text-align:left but forgot the semicolon. What are you trying to center? It looks like most of your content is left aligned with the headers centered. If you center align a paragraph’s text then the left and right edges are ragged.