/* Shared animation helpers */
.spin-slow { animation: spin 16s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.pulse { animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: .8; }
  50% { transform: scale(1.03); opacity: 1; }
}