Requires a preprocessor that supports CSS nesting, like 'Stylus' or 'Less'. Or you can use the already compiled version, `codeberg-modern-compiled.css` instead.
If you use the Stylus browser extension, you can use the [`codeberg-modern.user.css`](https://codeberg.org/Freeplay/CSS-Styles/raw/branch/main/codeberg/codeberg-modern.user.css) file instead to apply to any Gitea instance.