.loading {
  position: fixed;

  width: 50px;
  height: 50px;
  
  top: 50%;
  left: 50%;
  z-index: 5000;

  border-width: 5px;
  border-style: solid;
  border-color: #008080 #ccc;
  border-radius: 50px;
  -webkit-animation: spinning 0.55s infinite linear;
  animation: spinning 0.55s infinite linear;
}
