Change formatting of part of the markdown card withing wallpanel

Hi,

I’m playing around with wallpanel.
I would like to show some sensors with a description and style it so that the description is smaller than the value. For example an indoor temperature description with the actual temperature in a larger font size.

I tried using a markdown card inside wallpanel and that works, except for the styling.
I can use a theme and change the font size of all text inside the card, but I have no idea on how to style parts of it. I also tried to use card-mod with an entity card, but I think card-mod does not work when the card is shown inside wallpanel.

Anyone has an idea about what I can try next, or how to do more specific formatting within the markdown card?

Thanks,
Joep