:root {
  color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0f1115;
  color: #cdd5de;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { text-align: center; padding: 2rem; }
h1 {
  margin: 0 0 .5rem;
  font-size: 2.2rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: #e8eef4;
}
p { margin: 0; color: #8b98a5; }