CSS is broke or something after install

[Phid]

I had two ZC test sites that I had working on a site and I didn't look at them for about a month. When I returned to look at them and work on them a few days ago, I got a screen that was all messed up and I thought they were hacked.

I then installed a fresh installation in a new subfolder and when I go to the main ZC catlog index page, I see the same, messed up page....so I realize it was no hacking. It looks like there is no CSS for the page and looks awful. I don't know where to start looking because I can't accurately describe the problem. However, I imagine there's a simple explanation for the problem and it may have been answered before.

I've included a screenshot below: