:root { color-scheme: light dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font: 16px/1.6 system-ui, sans-serif;
  background: #0b0d10;
  color: #e6e8eb;
}
main { max-width: 34rem; padding: 2rem; text-align: center; }
h1 { font-size: 2.5rem; margin: 0 0 1rem; }
.marker { margin-top: 2rem; font-family: ui-monospace, monospace; font-size: 0.8rem; opacity: 0.5; }