:root {
  color-scheme: dark;
  font: 16px/1.5 system-ui, sans-serif;
}

body {
  display: grid;
  min-height: 100vh;
  margin: 0;
  background: #0d1117;
  color: #c9d1d9;
  place-items: center;
}

main {
  width: min(100% - 40px, 520px);
}

h1 {
  margin: 0 0 8px;
  color: #f0f6fc;
  font-size: 28px;
}

p {
  margin: 0;
  color: #8b949e;
}