Helped customer solve bug on his Carrd site where background image plugin isn't working, then repurposed solution into tutorial in template
Turns out, for some Carrd site layouts/templates, the plugin doesn't work. Still a mystery why it didn't work, even though I found the CSS to solve it.
Tutorial:
https://08862e02f9591b74.demo.carrd.co/#troubleshooting
Tutorial:
https://08862e02f9591b74.demo.carrd.co/#troubleshooting