As a fun side thing in the future (I'm feeling inspired, so maybe soon), I'd like a second, non-default theme that uses Departure Mono and changes some of the CSS values to adopt an aesthetic similar to what's shown on their site.
I like the idea of both baking a couple/few themes in and allowing the user easily to override everything.
The former could be implemented by templating some more CSS and threading a new config value from TOML to templates.
For the latter, I'm inclined to have a new config value for a user-provided static dir. We could serve everything in the dir and their entrypoint could be an
overrides.css. That allows the admin to pull in various self-hosted resources like fonts, CSS, and images.
If we currently, or plan to, rely on any font features like tabular figures, we need to make sure Departure Mono supports them before pulling it in. Same for any fonts we use for other first-party themes.