@keyframes spin-rotate {
  0% {
    transform: rotate(0deg); }
  50% {
    transform: rotate(180deg); }
  100% {
    transform: rotate(360deg); } }

.semi-circle-spin {
  position: relative;
  width: 35px;
  height: 35px;
  overflow: hidden; }
  .semi-circle-spin > div {
    position: absolute;
    border-width: 0px;
    border-radius: 100%;
    animation: spin-rotate 0.6s 0s infinite linear;
    background-image: linear-gradient(transparent 0%, transparent 70%, #55595c 30%, #55595c 100%);
    width: 100%;
    height: 100%; }
