CB

Implemented in r913.

This is CSS3, which degrades ok in CSS2.

Many thanks to GirlieMac:

http://girliemac.com/blog/2010/02/04/css3-box-shadow-with-inset-values-the-aqua-button-rerevisited/

There were also very good ideas in here, but didn't work on Firefox 3.6 yet:
http://www.schillmania.com/content/entries/2009/css3-and-the-future/