:root {
  --bg: #f7f7f5;
  --text: #1c1c1c;
  --muted: #5c5c5c;
  --card: #ffffff;
  --border: #e2e2de;
  --accent: #1c1c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --text: #f0f0ee;
    --muted: #a8a8a4;
    --card: #1e1e1e;
    --border: #2e2e2c;
    --accent: #f0f0ee;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main {
  width: 100%;
  max-width: 32rem;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}
h1 { margin: 0 0 0.5rem; font-size: 1.5rem; }
p { margin: 0 0 1rem; color: var(--muted); }
p:last-child { margin-bottom: 0; }
a { color: var(--accent); }