  input[type=radio]:checked::after {
  content: '';
  display: block;
  position: relative;
  top: 3px;
  left: 3px;
  width: 7px;
  height: 7px;
  background: #666;
  -moz-border-radius: 1em;
  -webkit-border-radius: 1em;
  border-radius: 1em;
  }
  input[type=checkbox]:checked::after {
  content: url(https://ssl.gstatic.com/ui/v1/menu/checkmark.png);
  display: block;
  position: absolute;
  top: -6px;
  left: -5px;
  }
  input[type=checkbox]:focus {
  outline: none;
  border-color: #4d90fe;
  }
  .stacke