.ob_overlay {
  position: fixed;
  left: 0px;
  top: 0px;
  height: 100%;
  width: 100%;
  z-index: 100002;
  /*background-color: rgba(0, 0, 0, 0.7);*/
  background-color: #000000;
  opacity: 0.66;
}

.ob_circle {
  position: fixed;
  left: 50%;
  top: 50%;
  margin-left: -50px;
  margin-top: -50px;
  font-size: 100px;
  z-index: 100003;
}