Thank you so very much for the very detailed explanation. I am a physician, but I would very much like to learn basic CSS. Still I think I should contact the dev team as you suggest.
I plan to insert a different card in every post of my blog, so, the page will contain many many card elements, all of them with a different front and background image.
Would you predict that this will slow down or crash the site? The fact that I insert so much different CSS on it?
Alternatively, would you suggest a different way to proceed, considering I plan to insert a lot of card elements?
Thank you again for your detailed aid.