There are borders around my flip cards only when clicked on and I’m not sure how to remove them. The article style and component settings in Appearance do not have a border set up. Can someone show me where I can remove this?

There are borders around my flip cards only when clicked on and I’m not sure how to remove them. The article style and component settings in Appearance do not have a border set up. Can someone show me where I can remove this?

That’s the Course Focus Outline Colour.
Go to Appearances > Themes > Course > Accessibility and you’ll see it there.