html { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #111214;
  color: #e9e9ea;
  font: 17px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
}
main { padding: 24px; text-align: center; }
h1 { margin: 0 0 8px; font-size: 28px; font-weight: 600; letter-spacing: .02em; }
p { margin: 0; color: #9a9ba0; }