.spinner {
  display: inline-block;
  position: relative;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top: 2px solid #1976d2;
  animation: spin 1s linear infinite;

  &--small {
    width: 16px;
    height: 16px;
    border-width: 1px;
  }

  &--medium {
    width: 20px;
    height: 20px;
    border-width: 2px;
  }

  &--large {
    width: 32px;
    height: 32px;
    border-width: 3px;
  }

  &__inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    border-radius: 50%;
    border: 1px solid transparent;
    border-top: 1px solid currentColor;
    animation: spin 0.8s linear infinite reverse;
  }
}

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