body,
html {
  height: 100%;
}

.lds {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.lds-dual-ring {
  display: inline-block;
  width: 128px;
  height: 128px;
}

.lds-dual-ring:after {
  content: ' ';
  display: block;
  width: 92px;
  height: 92px;
  margin: 1px;
  border-radius: 50%;
  border: 5px solid #3f51b5;
  border-color: #3f51b5 #3f51b5 transparent transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

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

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