Card-mod : Css popup

Hi, first time here, i dont know if i selected the right topic.
Basically, i need help…
I want to access to this (the blue cirle) style section using card-mod but i only can access to the red circle section.
Please , i spent hours looking for this and i didnt find anything.
Thank you in advance, and i apologize beacse i am not a native english speaker.

What code are you using to access the red section?

I should close this because i already fixed it. But here is my code:

Basically i have a style using card-mod for the cards and a style using mod-browser (or browser-mod dont remember now) to css the popup.
The output is this:

The blurred background is made by this plugin : Popup-Backdrop filter