This is kind of brilliant. I think if I were interviewing you, and asked you to do a FizzBuzz (which is unlikely, but let's ignore that), and you said "Oh, cool, can I do it in CSS," I'd have probably laughed at you.<p>This is clearly an academic exercise, but one that I would never have even thought to attempt, as I probably would have chalked it up to probably waaaay more trouble than it's worth.