How to use the crepe themes or create own themes and use them?

[Koffer0-0]

I want to change the default theme

import "@milkdown/crepe/theme/common/style.css";
import "@milkdown/crepe/theme/frame.css";

to this

import "@milkdown/crepe/theme/nord/style.css";
import "@milkdown/crepe/theme/frame.css";

It gives me error

Missing "./theme/nord/style.css" specifier in "@milkdown/crepe" package

IDK But the documentation is not clear.