progress-spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 1px solid transparent;
  border-top-color: rgba(0, 0, 0, 0.6);
  border-radius: 50%;
  -webkit-animation: rotate 800ms linear infinite;
          animation: rotate 800ms linear infinite;
}
progress-spinner[dark] {
  border-top-color: rgba(255, 255, 255, 0.6);
}
progress-spinner[dotted] {
  border-width: 0;
  border-style: dotted;
  border-top-width: 2px;
}
@-webkit-keyframes rotate {
  0% {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}
@keyframes rotate {
  0% {
    -webkit-transform: rotate(0deg);
            transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
            transform: rotate(360deg);
  }
}