Recreate Obsidian-esque Callout Formatting

I don’t know how much CSS you can customize with al-folio, but you can open the dev tools in Obsidian (Ctrl-Shift-I on Windows/Linux or Cmd-Opt-I on macOS) → go to the Sources tab → click on app.css → select all on the right in app.css → copy → paste in your code editor of choice.

You can then search through the app.css to see how the default callouts are constructed:

Here’s a great guide as well: