body {
  margin: 0;
  padding: 0;
  background: #111;
  color: #00ffc3;
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-size: 2rem;
  text-align: center;
}

.fade-in {
  animation: fade 2s ease-in-out;
}

@keyframes fade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}