.rotate-90 { transform: rotate(90deg); }
  .rotate--90 { transform: rotate(-90deg); }
  .will-change-transform { will-change: transform, opacity; }

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

.animate-spin-slow {
  animation: spin-slow 3s linear infinite;
}