you may have to add the servlet root path, of the servlet (webapp) that deliver the css file.
did you try it ?
that is :
instead of "ProcesosInternos", it should rather be the name of the web app.
the <display-name> that is in the web.xml file.
sometime, there must be a "_" before the name.
you can look in one of the html page that is produce by the portal, how it is done for the layout css file. See there how it is written for those layout and theme css files.
Thank you for your reply. The name ProcesosInternos, actually is the name of my web application. I've tried changing the path for the CSS in all kinds of ways, but to no avail. If I find what I'm doing wrong, I'll let you know...
Your style.css shouldn't be in the WEB-INF since it is not accessible from "outside".
Move the cc directory to the root of your war and do
<link type='text/css' rel='stylesheet' href='css/Styles.css' />