I have a 3-column layout and would like to make the main column wider to accommodate photos that are 500 pixels wide (right now it's something like 445). I'm very much a novice at HTML, and I couldn't figure it out by looking at my stylesheet.
The stylesheet is here: http://pastebin.com/a59NXi8M
And my blog is: http://www.emilyinchile.com/
I would also of course like to keep things centered, not just increase the size of the main column and have it all shift to the left. Any ideas? Thanks!