Unclear how to overwrite theme CSS files

[ctz]

Hi,

Thanks for the project! I'm trying to use it to make a landing page for my project, except I already made the landing page in HTML/CSS, but would still like to take advantage of the changelog and mdbook features.

This part of the docs has me confused:

Currently, to create a new theme, you need to follow the directions above in "Customizing Themes" and overwrite the given CSS.

Does this mean I should run oranda build and then do mv public/custom.css public/oranda-v0.6.1.css (or something else) to overwrite the CSS?

Or is it saying I should surround my custom CSS with @layer overrides { ... }? I tried that and the page still includes oranda-v0.6.1.css and its directives still override mine (eg, it changes the default body height, its body font-family overrides mine, etc.)

Thanks for any help!