body {
  height: 100%;
  width: 100%;
  position: absolute;
  overflow: hidden;
  background-color: #1B264F;
}

#loader {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -10vmin;
  margin-top: -10vmin;
  height: 20vmin;
  width: 20vmin;
  border-radius: 50%;
  border: 1vmin solid #576CA8;
  border-top-color: #274690;
  animation: spin 2s infinite linear;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}