.centered {
  margin-right: auto;
  margin-left: auto;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #f0f0f0;
  font-size: 24px;
  font-family: Ubuntu-Light, Helvetica, sans-serif;
  text-align: center;
}

.lds-dual-ring {
  display: inline-block;
  width: 24px;
  height: 24px;
}

.lds-dual-ring:after {
  content: " ";
  display: block;
  width: 24px;
  height: 24px;
  margin: 0px;
  border-radius: 50%;
  border: 3px solid #fff;
  border-color: #fff transparent #fff transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}