Clock card without background possible?

[kptkip]

Hi there,

is it possible to make the background of the clock card transparent?

After searching the Web (found this: https://pastebin.com/A7QWcyaD) I tried this:

           style: |
              ha-card {
                height: 110px;
                box-shadow: none;
                background: transparent;
              }
              :host {
                --mini-media-player-accent-color: white;
              }

But it makes all cards transparent, not only the clock.

Do you guys ave any idea to tackle this?