🔹 Card-mod - Add css styles to any lovelace card

I’m using card-mod nicely, but recently I had to try to use mod-card to customize a vertical-stack, but I got this error:

  • Custom element not found: mod-card’
type: custom:mod-card
style:
  hui-vertical-stack-card: null
  $: |
    #root > * {
    margin: 0px 0 0px 0;
    }
  card:
    type: vertical-stack
    cards:
      - type: entity
        entity: sensor.processor_temperature
        name: CPU Temp.
        icon: 'mdi:thermometer'
      - type: entity
        entity: sensor.processor_temperature
        name: CPU Temp.
        icon: 'mdi:thermometer'
      - type: entity
        entity: sensor.processor_temperature
        name: CPU Temp.
        icon: 'mdi:thermometer'