Opacity of info text

[jaid33]

Hi,
with full-cover and white album art it is pretty hard to read the info text.
I was playing around with card-mod to change text shadow and the overlay at the bottom, but one tricky thing is that the info-text has some opacity (mmp-info-opacity: 0.75).
If I change this value manually in the browser it seems to be much better, but I can't find a way to change it permanently.
That's my approach, everything except the --mmp-info-opacity is working.

card_mod:
style: |
:host {
--mmp-info-opacity: 0;
text-shadow: 0px 0px 1px rgba(0, 0, 0, 0.6);
--mini-media-player-media-cover-info-color: white;
--mini-media-player-overlay-color-stop: 25%;
--mini-media-player-overlay-color: rgba(0, 0, 0, 0.5)
}