🔹 Card-mod - Super-charge your themes!

I guess so.
Here my test:

  1. Create a theme:
  card-mod-more-info-yaml: |
    ha-more-info-history $: |
      .header {
        color: red;
      }
    .: |
      ha-more-info-history {
        --secondary-text-color: orange;
      }

2.Open more-info popup, switch to the 2nd tab - the color: red is not applied, the scale is orange:
image
3. Update the theme - run service: frontend.reload_themes.
4. Check that the header now is red:
image
5. Switch to the 1st tab, next back to the 2nd tab - the header is again of standard color.