facetapi.css in Facet API 6.3

.facetapi-checkbox {
  margin-right: .5em;
}

ul li.leaf a.facetapi-checkbox, ul li.expanded a.facetapi-checkbox,
ul li.collapsed a.facetapi-checkbox,
ul li.leaf a.facetapi-checkbox-processed,
ul li.expanded a.facetapi-checkbox-processed,
ul li.collapsed a.facetapi-checkbox-processed {
  display: inline;
}

/**
* Hide elements visually, but keep them available for screen-readers.
*
* Used for information required for screen-reader users to understand and use
* the site where visual display is undesirable. Information provided in this
* manner should be kept concise, to avoid unnecessary burden on the user.
* "!important" is used to prevent unintentional overrides.
* Copied from Drupal 7
*/
.facetapi-element-invisible {
  position: absolute !important;
  clip: rect(1px 1px 1px 1px); /* IE6, IE7 */
  clip: rect(1px, 1px, 1px, 1px);
}