Hi Bart, Look at Extension:CSS. It allows one to create individual sheets for individual pages. Another option is to use extension: NamespaceHTML. This extension allows you to use raw HTML (only use in a Namespace editable by admin) and than you can transinclude that the page designed by you (as if it was a template) into the page of your choice. Using this method you would use style tags in your HTML. This option allows a few more options since with Extension:CSS one still can't have background images. Unfortunately no extension, I know of, operates per category. A possible solution would be to use the Page Forms extension (formerly known as Semantic Forms) and design a default form for each category. That default form could have a template with the CSS for that category (this relies on using one of the methods mentioned above). Another option would be to use Namespaces instead of categories. Each Namespace than could use a different skin (using the extension:NamespacePerSkin) and you could further refine the CSS by setting the CSS rules in the Mediawiki:SkinName.css. Hopefully some of the above helps. Sent from my iPad