@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(8px); }
  50% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
  100% { transform: translateX(0); }
}

.animate-shake {
  animation: shake 0.3s ease-in-out;
}