What is CSS2?

Let's practice reading TEI source:

Cascading Style Sheets, level 2CSS2 is a
World Wide Web ConsortiumW3C specification.
Version 2.1 is a candidate recommendation draft past its inital last
call stage.]]>

The specification itself can be found on-line at the W3C site. Note that it is last call working draft; note section on Features at Risk.)

CSS3 has been around for a long time, but is still at an earlier stage of development, and has poor browser support.

Making a TEI File Look Good in a Browser, slide 6 of 13