My site has a dark-ish background and I would like to have all of my articles show up against a white background square that is just the size of the article.

www.motofrog.net

I am NOT great with CSS so if the suggestion is to just "throw in some code", I would appreciate it if it could be provided and suggested where to place it.

Of course if there is just a menu option that would handle it, that would be GREAT!

Thanks in advance.