:root {
  color-scheme: light dark;
  --fg: #1b1b1f;
  --bg: #fbfbfd;
  --muted: #5c5c68;
  --accent: #3b5bdb;
  --line: #e3e3ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e9e9ee;
    --bg: #131317;
    --muted: #a2a2b0;
    --accent: #8aa0ff;
    --line: #2a2a33;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main {
  flex: 1;
  display: grid;
  place-content: center;
  gap: 1rem;
  text-align: center;
  padding: 2rem;
}
h1 {
  font-size: clamp(2.75rem, 9vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0;
}
.lede { color: var(--muted); font-size: 1.15rem; margin: 0; }
.button {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  text-decoration: none;
}
.button:hover { border-color: var(--accent); }
footer {
  padding: 1.75rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}
footer p { margin: 0; }