.loader {
  display: none;
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #ed3237;
  margin: 0 auto;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  width: 30px;
  height: 30px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

@-webkit-keyframes spin {
  0% { -webkit-transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}