As css (and its variants) unfourtunately isn't implemented in a very consistent way by different browsers, browsers for different platforms, or versions of browsers on different platforms, perhaps some hints on how to make layouts could be useful. One page I found myself quite helpful, was: http://www.websitetips.com/css/index.shtml
A unifying approach to collect as many as possible flaws by a few alterations (know as work-arounds) has been done by this, e.g. http://www.saila.com/usage/layouts/saila_layout.html It also incorporates degrading issues, for catching old browsers into a reasonable layout. (Many more samples can be found from the link above.)
Even when considering future stylesheets in xsl (extensible stylesheet language) processed with xml, css is the way to style W3C says, together with some separate content formula such as xhtml (2.x). It isn't therefore totally implausible that some features, or at least ideas, can be reused in Moodle, even if stylesheets are made for the actual version of today. rgds! /Set Lonnert