@keyframes spinner-border {
  to { transform: rotate(360deg); }
}

.spinner-border {
    display: inline-block;
    width: 30px;
    height: 30px;
    vertical-align: text-bottom;
    border: 3px solid;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border .75s linear infinite;
}

.spinner-border-sm {
  width: $spinner-width-sm;
  height: $spinner-height-sm;
  border-width: $spinner-border-width-sm;
}
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}
@keyframes spinner-grow {
  0% {
    transform: scale(0);
  }
  50% {
    opacity: 1;
  }
}

.spinner-grow {
  display: inline-block;
  width:20px;
  height:20px;
  vertical-align: text-bottom;
  background:currentColor;
  border-radius: 50%;
  opacity: 0;
  animation: spinner-grow .75s linear infinite;
}

.spinner-grow-sm {
  width:30px;
  height:30px;
}