What's dp (density independent pixels) units with CSS?

Question

For Android, people recommend using dp (density independent pixels) measurements for UI elements, and there are conventions that exist such as using 48dp for a

Answer 1

What about a interface based on rem units?

I'm not experienced enough on the matter to confirm, but I think you could make some math based on the viewport size to apply a font-size in the root element and the entire interface would adjust accordingly. This stuff is a bit of witchcraft to me yet.