> does the exemple in the docs, or t/basic.t in the distribution not point you in the right direction? Is there something missing from the docs that is causing you pain? Haha! I'm remembering now what I thought last week: my files are not all in the same folder, so I have to list them all first. I had tried <**/*.css> and the wildcard didn't work; I left that in the code last week, and this week assumed it did work. Sorry for a question whose answer I had.
Plack::App::MCCS <https://metacpan.org/pod/Plack::App::MCCS> seems good. How to you use it with a Dancer2 app? (what is $app in the case of a Dancer2 app?)