Hello Jim,
I don't know about this one, but the possibilities about how styles can be used are explained in the docs (see developer.servoy.com, you will find useful PDFs, that you can search). But I would also like to say that those possibilities are limited. That is due to the fact that the HTML renderer from Sun is very limited. You may be able to overcome this for example with the SHE (Servoy HTML editor?) plugin that you can get here:
http://www.directict.nl. Or maybe with the OLE plugin (maybe allows you to "implement" any browser using OLE) that soon might arrive. There are many other ways you can think of (beans, plugins).
But in general I would say: styles help you to maintain a certain order, but are limited in comparison to what a normal browser can do. The same goes for the HTML component, currently. Knowing the limitations, there is still many interesting possibilities of presenting information using HTML inside Servoy. But don't expect to be in a browser.
Hope this helps
Patrick