@keyframes spinner-border {
  to { transform: rotate(360deg); }
}
.spinner-border{
  display: inline-block;
  width: 2rem;
  height: 2rem;
  vertical-align: text-bottom;
  border: .25em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  -webkit-animation: .75s linear infinite spinner-border;
  animation: .75s linear infinite spinner-border;
}