Hi Saguaros
Thank you for your advice indeed.
Just to be clear once more my case:
there is a class defined in template.css. I'd like to add this class to a div which is already styled by another existing "template" class.
So is there any solution to style this div with this "template class" by adding some cute line in custom.css line? Is is possible only by edition of layout file (which can be overwritten later during update of J2Store app)?
regards Tomek
p.s class addition could be done so easily in Dev Tools so maybe there is a solution ;-)