Hi, I am trying to learn some more about css3 elements however the best that I have been able to find is www.css3.com, which is, as far as I can tell, not official. W3C.org is less helpful or at least I have not been able to find some good information on their site yet.
Is there a good site like css3.com that lists the different elements? I think they are called elements. Is css3.com adequate? Are they semi-professional?
I notice that Opera keeps up with the latest CSS3 properties and ie8 does to some extent as well. Firefox does not seem to keep up with CSS3 at all though.

