:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --muted: #57534e;
  --border: #e7e5e4;
  --link: #1d4ed8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141414;
    --surface: #1e1e1e;
    --text: #ededed;
    --muted: #a3a3a3;
    --border: #2e2e2e;
    --link: #8ab4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main, header, footer { max-width: 680px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 56px; }
header a { color: inherit; text-decoration: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 48px 0 12px; }
h3 { font-size: 1.05rem; margin: 0 0 4px; }
p { margin: 0 0 12px; }
.lede { color: var(--muted); font-size: 1.1rem; }
.muted { color: var(--muted); }
a { color: var(--link); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.card p { color: var(--muted); }
.links { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer {
  margin-top: 64px;
  padding-top: 20px;
  padding-bottom: 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}
footer a { color: inherit; }
.note { color: var(--muted); font-size: 0.85rem; margin: 12px 0 0; }