Came to upvote this. I think that github component in particular worked really well for me on a recent experiment. Server-rendered HTML can use custom components in our fancy world today! It's a feel-good place to be compared to just a decade ago imo.

Do webcomponents apply css from their parent tags? Years back I found it a diva.

It depends on how you set it up.

https://css-tricks.com/styling-a-web-component/

TIL! I didn't know this even existed.