.webform-options-display-two-columns input[type="radio"] {
  display: none;
}

.webform-options-display-two-columns label {
  display: inline-block;
  width: 200px;
  height: 100px;
  padding: 10px 20px;
  background-color: #ddd;
  border: red;
  border-radius: 2px;
  margin: 10px;
  cursor: pointer;
  text-align: center;
}

.webform-options-display-two-columns input[type="radio"]:checked + label {
  background-color: #3f51b5;
  color: white;
}