CSS variables help somewhat with this. Variable values penetrate the shadowroot, so you can effectively build an "api" for styles your component. I've done that

CSS variables help somewhat with this. Variable values penetrate the shadowroot, so you can effectively build an "api" for styles your component. I've done that a few times, and it's been enough for me to get by in most cases. An example is here: https://github.com/jjcm/soci-frontend/blob/master/components/soci-user.js#L15-L19 https://github.com/jjcm/soci-frontend/blob/master/components...