Pure CSS spinner

by A Jarvis

HTML

<div class="spinner"></div>

CSS

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

.spinner,
.spinner:before,
.spinner:after {
  border-radius: 50%;
}
.spinner:before,
.spinner:after {
  position: absolute;
  content: '';
}
.spinner:before {
  width: 5.2em;
  height: 10.2em;
  background: #fff;
  border-radius: 10.2em 0 0 10.2em;
  top: -0.1em;
  left: -0.1em;
  -webkit-transform-origin: 5.2em 5.1em;
  transform-origin: 5.2em 5.1em;
  -webkit-animation: spin 2s infinite ease 1.5s;
  animation: spin 2s infinite ease 1.5s;
}
.spinner {
  font-size: 12px;
  text-indent: -99999em;
  margin: 55px auto;
  position: relative;
  width: 10em;
  height: 10em;
  box-shadow: inset 0 0 0 1em #00e7b3;
  -webkit-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
}
.spinner:after {
  width: 5.2em;
  height: 10.2em;
  background: #fff;
  border-radius: 0 10.2em 10.2em 0;
  top: -0.1em;
  left: 5.1em;
  -webkit-transform-origin: 0px 5.1em;
  transform-origin: 0px 5.1em;
  -webkit-animation: spin 2s infinite ease;
  animation: spin 2s infinite ease;
}