How Do I Overlay a Clock Card on top of Picture Cards for a Dashboard?

I’m trying to have the current time in the center of a dashboard I created for some security camera monitors. There’s a default “clock” card that looks like it would do fine for this purpose. I’ve seen mention of being able to have cards stack over the top of other cards and have a transparent background using modifications. How does one go about doing such a thing?

Here’s the code for the dashboard in question:

kiosk_mode:
  mobile_settings:
    hide_header: true
views:
  - title: Home
    type: panel
    cards:
      - square: false
        type: grid
        cards:
          - show_state: false
            show_name: false
            camera_view: live
            type: picture-entity
            entity: camera.front_g4_pro_low_resolution_channel
          - show_state: false
            show_name: false
            camera_view: live
            type: picture-entity
            entity: camera.garage_g4_bullet_low_resolution_channel
          - show_state: false
            show_name: false
            camera_view: live
            type: picture-entity
            entity: camera.back_g4_pro_low_resolution_channel
          - show_state: false
            show_name: false
            camera_view: live
            type: picture-entity
            entity: camera.porch_g4_bullet_low_resolution_channel
        columns: 2

The clock card is just the one that seems to be baked into things:

clock_size: medium
show_seconds: false
type: clock
grid_options:
  columns: 12
  rows: 1

It doesn’t have to be this one. Just seemed the easiest for this.

Here’s an (admittedly crappy) illustration of what I’m going for if you line up the two lines and the clock card had a transparent background:

I have never seen any mention of this. Got a link?

I had to go back to find it but it was mentioned here and the person mentioning it said that it could be done w/CSS but didn’t provide any other info which leads me to believe this is a common thing that most other people probably know about.

No not common. Best to ask Ildar for more details.

Hello. I am rather far from PC. Will be able to give clarifications in a week I hope.