Journal managers can only upload one css file for the journal. Whenever you want to import other css files, especially to support different media types, you could only import css files from external servers (or let your webmaster put additional css files into the styles folder). Journals publishing HTML galleys might like OJS support for at least media types 'print' and 'handheld'.

So I'd like to request an additional feature: support for media types in uploaded css files.

Simple way: allow upload of more than one css file
Little more complicated, but cleaner: add particular upload forms for print.css, handheld.css, etc. and import the uploaded files via 
@import url("print.css") print;
etc.

Any thoughts, comments?