Trying to increase icon size from mushroom template card

Configuration Frontend
1

I have some square buttons based on a template card. I was able to increase the font size, but after a day trial and error, I am still not able to increase the icon size. Tried some options from the (excellent) guide from Dmitri, but without success. Any tips how to increase the icon size (and probably the shape, so it is not clipped) would be welcome.
Used yaml below

        - type: custom:mushroom-template-card
          primary: Muziek
          icon: mdi:music
          icon_color: purple
          layout: vertical
          tap_action:
            action: call-service
            service: scene.turn_on
            target:
              entity_id: scene.muziek_luisteren
          card_mod:
            style: |
              ha-card {
                aspect-ratio: 1 / 1;
                --ha-tile-info-primary-font-size: 24px;
              }