How to make relative path of css file?

[Ki_Setargilop]

Hi,

Last time I query about relative path of js, this is the reply from Ralf:

For other names, you either have to use a path relative to the
egroupware root:

    egw_framework::validate_file('/myapp/js/somejs.js')

or

    egw_framework::validate_file('.','some','myapp') 

====================================================

How about for css?
Please advise.

Thanks,

Gil