Enlarge weather icon

Hi I’m trying to create a ( REALY SIMPLE ) smart mirror and I need to have a large time and weater card

So I try to apply style on the weather card but right now I only manage to change the background


        - type: weather-forecast
          entity:  weather.maison
          show_name: false
          style: |
            ha-icon {
                      --paper-item-icon-color: white;
                      height: 200%; #notworking
                  }
          style: |
            ha-card {
                      height: 200%; #notworking
                  }

how can I change the seize off the icon of the weather card ?