body {
  margin: 0;
  font-family: system-ui, sans-serif;
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: #0f172a;
  color: #e2e8f0;
}

.card {
  text-align: center;
  padding: 2rem;
  max-width: 560px;
}

h1 {
  margin: 0 0 .5rem;
  font-size: 2rem;
}

p {
  opacity: .85;
}