Global custom.css (and .js) for multiple graphs?

Is there a way to store single custom.css / custom.js in local filesystem and let Logseq point to it via global config.edn settings, so they get applied for all graphs? I tried to add :custom-css-url, as suggested here:

:custom-css-url "@import url('assets:///home/myuser/.local/share/logseq/path/to/custom.css');"

But this did not work (I am on Linux box instead of OP’s Windows). Kindly point me to correct setting. Isn’t global custom.js possible at all?

(If you test this: I needed to clear cache by restarting Logseq 2 or 3 times to see, this does not work. Some styles seem to get cached still from previous per-graph custom.css.)