.center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%)
}
.loader {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: inline-block;
  position: relative;
  border: 3px solid;
  border-color: #000 #000 transparent;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

/*.loader::after {*/
/*  content: '';*/
/*  box-sizing: border-box;*/
/*  position: absolute;*/
/*  left: 0;*/
/*  right: 0;*/
/*  top: 0;*/
/*  bottom: 0;*/
/*  margin: auto;*/
/*  border: 3px solid;*/
/*  border-color: transparent #b8599b #b8599b;*/
/*  width: 32px;*/
/*  height: 32px;*/
/*  border-radius: 50%;*/
/*  animation: rotationBack 0.5s linear infinite;*/
/*  transform-origin: center center;*/
/*}*/

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

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