Custom button card... visual mods not working anymore

Hi,
I had nice looking media player, but since December update it all turned to rubbish.
No more transparency and those ugly borders.
Any ideas?

- type: custom:button-card
                aspect_ratio: 1/1
                entity_picture: /local/img/radio_ndr2.png
                show_entity_picture: true
                show_state: false
                show_name: false
                tap-action:
                  action: call-service
                  service: media_player.play_media
                  data:
                    media_content_type: favorite
                    media_content_id: '7'
                  target:
                    entity_id: media_player.lounge_heos
                style:
                  left: 13%
                  top: 15%
                styles:
                  card:
                    - height: 240px
                    - width: 240px
                card_mod:
                  style: |
                    ha-card {
                      background: transparent;
                      border-style: none;
                      border: 0px;
                      box-shadow: none;