.btn-loading{
	position:static;
	pointer-events:none;
	background-color:blue;
}
.btn-loading::after {
  content: '';
  display: block;
  width: 20px;
  height: 20px;
  position: absolute;
  left: calc(50% - 0.75em);
  top: calc(50% - 0.75em);
  border: 20px solid transparent;
  border-right-color: white;
  border-radius: 50%;
  animation: button-anim 0.7s linear infinite;
  opacity: 0.3;
}

@keyframes button-anim {
  from {
    transform: rotate(0);
  }
  to {
    transform: rotate(360deg);
  }
}