body {
  font-family: sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background: #1a1a2e;
  color: #eee;
}
h1 {
  font-size: 1.5rem;
  opacity: 0.7;
}