Help the lost and confused at your site by following the advice at A List Apart. (Yes, I know this site doesn’t have a proper 404 page — long story — but if it did, the page would look something like the one suggested in the article).
While riding home on the streetcar last night (with a brain burnt by a day of slogging with Netscape 4.x’s idea of CSS) I was wondering how I might convert what I was seeing (at the time, a streetcar door) into CSS.
Sure it would have been possible, but incredibly complex. The beauty/curse of the Web is that if you have thought of something, someone else has likely done it. A stunning example is this extremely detailed thumbnail of some pencil crayons — created entirely with style sheets (via webgraphics).