:root {
  --bg: #fafaf8;
  --fg: #1f2328;
  --muted: #59636e;
  --line: #e1e4e8;
  --link: #0a5bc4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --fg: #e6e8eb;
    --muted: #9aa4af;
    --line: #2d3238;
    --link: #6cb0ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  line-height: 1.8;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 1.75rem; line-height: 1.4; margin: 0 0 8px; }
h2 { font-size: 1.1rem; margin: 36px 0 8px; padding-top: 20px; border-top: 1px solid var(--line); }
p, li { margin: 0 0 12px; }
ul { padding-left: 1.4em; }
a { color: var(--link); }
.lead { color: var(--muted); margin-bottom: 32px; }
.badge {
  display: inline-block; font-size: 0.8rem; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 12px; margin-bottom: 16px;
}
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--muted); }
footer a { margin-right: 16px; }