.spinner-border {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  vertical-align: text-bottom;
  border: 0.25em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  -webkit-animation: spinner-border .75s linear infinite;
  animation: spinner-border .75s linear infinite;
}

@keyframes spinner-border {
  100% {
    transform: rotate(360deg);
  }
}
.spinner-grow {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  vertical-align: text-bottom;
  border-radius: 0.2em;
  background-color: currentColor;
  -webkit-animation: spinner-grow .75s linear infinite;
  animation: spinner-grow .75s linear infinite;
}