@keyframes colorChange {
  0% { background: #667eea; }
  50% { background: #764ba2; }
  100% { background: #667eea; }
}

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

@keyframes scale {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}