einundzwanzig-portal/support/laravel-maps/resources/sass/index.scss

.gnw-map-service {
  position: relative;
  height: 400px;

  &__google {
    background: rgb(229, 227, 223);
  }
  &__osm,
  &__bing,
  &__mapquest {
    background: rgb(221, 221, 221);
  }
  &__yandex {
    background: rgb(243, 241, 237);
  }
  &__mapkit {
    background: rgb(248, 244, 236);
  }
}

.gnw-map {
  height: inherit;

  // Fix Mapkit canvas
  .mk-map-view {
    > .syrup-canvas {
      margin-left: -50%;
    }
  }
}