:root {
  --bg: #fafafa;
  --ink: #1c1c1e;
  --muted: #8e8e93;
  --faint: #c7c7cc;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  min-height: 100vh;
}
.wrap { margin: auto; padding: 40px; text-align: center; }
.mark {
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.lede {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 400;
}
.foot {
  position: fixed;
  left: 0; right: 0; bottom: 20px;
  text-align: center;
  color: var(--faint);
  font-size: 12px;
  letter-spacing: 0.02em;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000; --ink: #f2f2f7; --muted: #8e8e93; --faint: #48484a; }
}