Ok, I know I'm gonna be modded as "Troll", but I need to say it: CSS is an horrible, backward, overly-complex standard. And yet, for philosophical / ideological reasons, it has been branded by the semantic folks as one of the most exciting innovation of the 20st century.
CSS has been invented in the days when most web pages consisted of simple blocks of text, with an occasional image floating left or right of it. All that was needed back then was changing the color of text, adding margins / paddings and that's about it. It was NOT designed to handle complex layouts: for that, you used tables.
Even CSS 2 isn't supported properly by some browsers. Let alone CSS 3. And while you may think it isn't W3C's fault, I think perhaps, if some of the richest companies in the world haven't been able to implement this standard properly in, say, 10 years of continued effort, and that standard doesn't even reproduce all of the basic features that have been used in print for decades, it *might* be overly complex to get right. Look at these stupid cascading rules, for example: who seriously wants that ?
We need to move forward and develop new standards, focusing on /features/ rather than on pseudo-philosophical crap. We want to design websites that look great. Period.