body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #3b0a63, #7b2ff7, #a56bff);
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  color: #fff;
}
.wrap {
  text-align: center;
  padding: 2rem;
}
.octo {
  font-size: 5rem;
  animation: bob 2s ease-in-out infinite;
}
h1 {
  font-size: 2.5rem;
  margin: 0.5rem 0;
}
p {
  font-size: 1.1rem;
  opacity: 0.9;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}