Markdown Card - merge multiple lines together


it is very complicated, does anyone know how I cann combine the mushroom mod with the ha_card mod? I can only use one of these mods.
image

type: custom:mushroom-template-card
primary: '{{ ''online'' if states(entity) == ''on'' else ''offline'' }}'
icon: '{{"mdi:wifi" if states(entity)=="on" else "mdi:wifi-off"}}'
entity: binary_sensor.cupra_born_car_is_online
multiline_secondary: false
layout: vertical
icon_color: '{{ ''green'' if states(entity) == ''on'' else ''red'' }}'
fill_container: false
card_mod:
  style: |-
    ha-card {
     {% if
      is_state('binary_sensor.cupra_born_car_is_online','on') %} 
       --card-primary-color:
     {%else%}
      --card-primary-color:#7E7E7E;
     {% endif %}
    } mushroom-shape-icon$: >
      .shape {
        --icon-symbol-size: 21px;
        --icon-size: 100px;
      }

I would suggest to ask in corresponding mushroom / card-mod / … threads.
The thread titled “markdown card …” contains lots of unrelated things.