app/common/styles/elements/loader.scss

// Loader Spinner

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

.loader__wrapper {
  width: 115px;
  height: 115px;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 3em 0;
  z-index: 91;
}

.icon__loader {
  width:100%;
  height:100%;
  transform: translateZ(0) rotate(360deg);
  transform-origin: center center;
  -moz-transform-origin: center center; /* firefox requires fixed values */
  animation: rotate 1s linear infinite;
  svg circle {
    stroke-dasharray: 80px;
    stroke-dashoffset: 9.7px;
    fill: transparent;
    stroke: $base-01--02;
    stroke-width: 5px;
    stroke-linecap: round;
  }
}

.icon__loader-sm {
  width: 1.4rem;
  height: 1.4rem;
  vertical-align: text-bottom;
  border-width: .2em;
  line-height:0;
}

.loader__overlay {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  background: $base-02--07;
  height: 100%;
  z-index: 90;
  width: 100%;
}