.js-loading {
  height: 100%;
  display: block;
  width: 100%;
  background: #66add9;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9999;
}
.js-loading-parts {
  top: calc(50% - 45px);
  left: calc(50% - 30px);
  width: 60px;
  height: 60px;
  text-align: center;
  display: block;
  position: absolute;
  border-radius: 50%;
  border-top: 4px solid rgba(255, 255, 255, .5);
  border-right: 4px solid rgba(255, 255, 255, .3);
  border-bottom: 4px solid rgba(255, 255, 255, .5);
  border-left: 4px solid rgba(255, 255, 255, .3);
  animation: 2s linear rotate infinite;
}

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