.loader {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Ref) https://loading.io/css/ */
.lds-dual-ring {
  display: inline-block;
  width: 160px;
  height: 160px;
}

.lds-dual-ring:after {
  content: " ";
  display: block;
  width: 128px;
  height: 128px;
  margin: 16px;
  border-radius: 50%;
  border: 12px solid #0079F2;
  border-color: #0079F2 transparent #0079F2 transparent;
  animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}