Discourseの埋め込みの外観をカスタマイズする方法は？

[JammyDodger]

I think the auto-dark embeds has cropped up before if this is any use:

Automatic dark mode for embedded comments as well?

Automatic Dark Mode color scheme switching is a fantastic addition, thanks for integrating it! With (automatic) color scheme switching available, I’m wondering if there might also be some way to switch back and forth between light and dark Discourse modes when embedded as comments in a blog. Specifically, my Ghost blog has a toggle that users can click on to manually switch back and forth between light and dark modes. I know that my blog’s CSS can’t effect the CSS within Discourse’s iframe, but…