CSS Loading Spinner Generator

@keyframes spinner {
  0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); }
}
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #3b82f622;
  border-top: 4px solid #3b82f6;
  border-radius: 50%;
  animation: spinner 1s linear infinite;
}