body {
  margin: 0;
  padding: 36px 16px;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

security-alert {
  animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  body {
    padding: 16px;
  }
  
  security-alert {
    width: 100%;
    padding: 16px;
  }
}