Review antora lunr search css

[countableSet]

Nice, no more dependency on supplemental ui via https://gitlab.com/antora/antora-lunr-extension/-/commit/2521a335800edafb7f44160400aa6777df46cf4d

Looks like the search box might not be using the correct css?

dark:

light:

Just review what's going on and make sure stuff is working ok.

Also search.css comes last, that might be an issue...