The following figure shows the use of wro4j in a Primo search. Note that primo_library_css.css is a virtual file and cannot be viewed.
wro4j Integrated in Primo Search
With the use of wro4j in Primo, no file locations have changed and you should not expect or need to make any changes to your CSS files.
The following figure shows the expanded list of CSS files that are being used for a Primo search.
Expanded List off CSS Files in Primo Search