article.js-app div.pairs_tapntapSelection {
  border-color: #ff5100;
  border-style: solid;
}

article.js-app div.pairs_dropTarget {
  display: inline-block;
  vertical-align: top;
  height: 28em;

  /* For IE 7 */
  zoom: 1;
  *display: inline;
}

article.js-app div.pairs_dropSource {
  display: inline-block;
  vertical-align: top;
  overflow: auto;
  height: 28em;

  /* For IE 7 */
  zoom: 1;
  *display: inline;
}

article.js-app div.pairs_dropTarget div,
article.js-app div.pairs_dropSource div {
  font-size: 1.6em;
  margin-bottom: 0.3em;
  padding-left: 0.125em;
  background: #eee;
  display: block;

  -webkit-border-radius: 0.125em;
  -moz-border-radius: 0.125em;
  border-radius: 0.125em;
  -ms-touch-action: none;

  -webkit-transition: background-color 0.5s ease 0s;
  -moz-transition: background-color 0.5s ease 0s;
  -o-transition: background-color 0.5s ease 0s;
  transition: background-color 0.5s ease 0s;
}

article.js-app div.pairs_dropTarget div.pairs_hovered {
  background: #ddd;
}

article.js-app div.pairs_dropSource div {
  cursor: pointer;
}

article.js-app div.pairs_dropSource div.ui-draggable-dragging {
  -webkit-box-shadow: 1px 1px 2px #888;
  -moz-box-shadow: 1px 1px 2px #888;
  box-shadow: 1px 1px 2px #888;
}

article.js-app div.pairs_dropTarget div.pairs_correct {
  background-color: #d0ffbf;

  -webkit-box-shadow: 1px 1px 2px #888;
  -moz-box-shadow: 1px 1px 2px #888;
  box-shadow: 1px 1px 2px #888;
}

article.js-app div.pairs_dropTarget div.pairs_incorrect {
  background-color: #ff5656;

  -webkit-box-shadow: 1px 1px 2px #888;
  -moz-box-shadow: 1px 1px 2px #888;
  box-shadow: 1px 1px 2px #888;
}