html, body { height: 100%; margin: 0; }

body {
  background: #0a0a0b;
  color: #e6e6e6;
  font: 16px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  display: grid;
  place-items: center;
}

main {
  text-align: center;
  padding: 1rem;
}