* {
  margin: 0;
  padding: 0;
}
.lds-dual-ring .sr-only {
  display: none;
}
.lds-dual-ring {
  display: inline-block;
  width: 40px;
  height: 40px;
}

.lds-dual-ring:after {
  content: ' ';
  display: block;
  width: 32px;
  height: 32px;
  margin: 4px;
  border-radius: 50%;
  border: 3px solid #0070ba;
  border-color: #0070ba transparent #0070ba transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

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

  100% {
    transform: rotate(360deg);
  }
}
.app-container {
  position: absolute;
  top: 0;
  height: 100%;
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}