Fatman website dynamic resolution change

http://fat-man-collective.com/

okay, I have two different monitors (one is 1024x768, one is 1680x1050). When I look at the site on each monitor, the website seems to correctly shift the text all the way to the left, and also resize everything with precision…

how did they do this dynamically? Or am I just thinking about a process that’s sooo easy that I’m thinking it’s hard?

btw…I have a feeling this whole site is xml based, which is incredible…I’d love to discuss this site more.