/*
 *  Usage:
 *
 *    <div class="sk-spinner sk-spinner-rotating-plane"></div>
 *
 */
.sk-spinner-rotating-plane.sk-spinner {
  width: 30px;
  height: 30px;
  background-color: #333;
  margin: 0 auto;
  -webkit-animation: sk-rotatePlane 1.2s infinite ease-in-out;
          animation: sk-rotatePlane 1.2s infi