body {
  background: linear-gradient(to bottom right, #000000, #1a1a1a);
  font-family: 'Segoe UI', sans-serif;
  color: white;
  margin: 0;
  padding: 0;
  text-align: center;
}
header {
  padding: 2rem;
  background: linear-gradient(to right, #00ffff, #9900ff);
  -webkit-background-clip: text;
  color: transparent;
}
main {
  padding: 2rem;
}
section {
  margin: 2rem auto;
  max-width: 600px;
  padding: 1.5rem;
  border: 1px solid #333;
  border-radius: 12px;
  background-color: rgba(255,255,255,0.05);
}
button {
  margin-top: 1rem;
  background: linear-gradient(to right, #00ffff, #9900ff);
  border: none;
  color: white;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
}
footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: #999;
}