[SOLVED] Where is the CSS files?

I'm sorry but I'm new to this joomla thing. Does joomla handle the CSS or does domus have its own CSS? I'd like to change the property list borders color. Also, where can I remove the categories that are displayed on the front end. I only need one category and do not need the category displayed in the large box.

Thanks again, you have been most helpful.

hi, CSS files are inside the media/com_domus/css folder.
However, if you want to preserve your modified CSS through updates, you should take a look at the media overrides:
www.fabbricabinaria.it/en/docs/domus-organizer/media-override