I put the custom userstyle.css and userchrome.css into .config/joplindesktop, but when I restart Joplin, everything looks the same.
When I click "Edit" under "Custom stylesheet for rendered Markdown," I can actually see the custom CSS code, but it doesn't seem to be going into effect.
So that css looks like it works just fine for me on Windows and on macOS (its a nice theme too, I might adopt parts of it). I assume you are also putting the newsprint folder into ~/.config/joplin-desktop ?
Just to make sure, the userstyle.css won't do anything to the rich text/WYSIWYG editor, it only alters the rendered markdown output from the standard editor so is that what you are using?
Pardon my ignorance, I had long ago set it so that my only options were the raw markdown editor and the full WYSIWYG. Do you know if there's any way to change the font in the WYSIWYG editor? That's really the only thing I'd want to change.
Thanks, and can delete/lock this thread as requested.