html,
body {
    height: 100%;
    width: 100%;
    background-color: #ffffff;
}

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


/* Credits: https://tobiasahlin.com/spinkit/ */

.spinner {
  width: 40px;
  height: 40px;
  margin: 100px auto;
  background-color: #164558;

  border-radius: 100%;
  -webkit-animation: sk-scaleout 1.0s infinite ease-in-out;
  animation: sk-scaleout 1.0s infinite ease-in-out;
}

@-webkit-keyframes sk-scaleout {
  0% { -webkit-transform: scale(0) }
  100% {
    -webkit-transform: scale(1.0);
    opacity: 0;
  }
}

@keyframes sk-scaleout {
  0% {
    -webkit-transform: scale(0);
    transform: scale(0);
  } 100% {
    -webkit-transform: scale(1.0);
    transform: scale(1.0);
    opacity: 0;
  }
}