<div class="cntr">
  <input checked="" type="checkbox" id="cbx" class="hidden-xs-up">
  <label for="cbx" class="cbx"></label>
</div>
<style>
/* From Uiverse.io by cssbuttons-io - Tags: checkbox, squishy */
.cbx {
 position: relative;
 top: 1px;
 width: 27px;
 height: 27px;
 border: 1px solid #c8ccd4;
 border-radius: 3px;
 vertical-align: middle;
 transition: background 0.1s ease;
 cursor: pointer;
 display: block;
}

.cbx:after {
 content: '';
 position: absolute;
 top: 2px;
 left: 8px;
 width: 7px;
 height