Creating uniform entities

I have a dashboard with a series of custom:bar-card types, containing various entities. I want to apply the same general formatting to all of them (curving the edges, removing the icons, etc).

How can I apply this to everything on the dashboard rather than having to copy and paste the formatting into each entity?

I know there’s going to be a page for this somewhere in the documentation, but I don’t know what I’m searching for

You can do this via Themes.

and templates…

But to to the nature of home assistant and the lack of uniformity/consistency you also need card_mod, plenty of time and patience…

Card_mod is installed, although I’m yet to get it working.

I’ll have a look at themes and templates. Thanks all.