@darder José, thank you for the kind words! But I’m not sure I quite understand your requirement. Cards do have a “None” style already that renders no shadow, no border, and no background at all. As you can see on the first screenshot, the inline cards list at the top under “Actual” has a “Outline” style, while on the second screenshot, the very same card has a “None” style.
Please let me know what you mean by no background exactly, since we’re always willing to hear any feedback in order to improve more customization/options over the design of the apps and its components.
ajá! I think I understand now: “Legibility issues with the favourite button on cards, due to the low contrast that Malevich would call: white on white”.
I’m going to tag @Adrianne_Ngam since she made an amazing work on cards and probably will take care of this feedback