Style Radio facet choices as checkboxes

/**
 ** Styles a Radio facet to look like a Checkboxes facet, but still
 ** function like a (single select) Radio facet. 
 ** Change 'my_facet' in '.facetwp-facet-my_facet' to match the facet
 ** name (not label, see https://facetwp.com/help-center/facets/#the-facet-label)
 ** of your facet and the background URL to be
 ** a relative or full URL to the correct image.
 ** Also see: https://facetwp.com/help-center/facets/facet-types/radio/#style-radio-facet-choices-as-checkboxes
 **/


.facetwp-facet-my_facet .facetwp-radio {
  background: url('/wp-content/plugins/facetwp/assets/images/checkbox.png') 0 50% no-repeat;
  background-size: 14px 14px;
}

.facetwp-facet-my_facet .facetwp-radio.checked {
  background-image: url('/wp-content/plugins/facetwp/assets/images/checkbox-on.png');
}