The new Google Sites service is amazing, a website (mostly static with some Google services) can be created with just 1 file in Google Drive.
However, it has no direct UI to customise CSS or to add additional JS.
Anyone with a work-around for this?
As far as I can see, this is not possible. I gave it a spin, but no Luck.
There are multiple questions on SO about this, and they all lead to the documentation, which doesn't give us any more information:
Create my own Google site template Using my own CSS
https://support.google.com/sites/answer/98216?hl=en&visit_id=637177843384493895-752760820&rd=2