html.loading body::before {
  content: "";
  display: block;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 99;
  background-color: rgba(255, 255, 255, 0.8);
}
html.loading body::after {
  content: "";
  position: fixed;
  top: calc(50% - 30px);
  left: calc(50% - 30px);
  display: block;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 6px solid #3D613C;
  border-left-color: transparent;
  border-right-color: transparent;
  z-index: 99;
  animation: loading 0.75s linear infinite;
}

@keyframes loading {
  0% {
    transform: rotate(0deg);
    width: 60px;
    height: 60px;
    top: calc(50% - 30px);
    left: calc(50% - 30px);
  }
  50% {
    transform: rotate(180deg);
    width: 40px;
    height: 40px;
    top: calc(50% - 20px);
    left: calc(50% - 20px);
  }
  100% {
    transform: rotate(360deg);
    width: 60px;
    height: 60px;
    top: calc(50% - 30px);
    left: calc(50% - 30px);
  }
}