#antidebug-notice {
  font-family: Arial, sans-serif;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  animation: fadeInOut 2.5s;
}
@keyframes fadeInOut {
  0% { opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { opacity: 0; }
}