:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --border: #e2e2e2;
  --link: #2563eb;
  --max-width: 720px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
header.site-header { border-bottom: 1px solid var(--border); padding: 20px 0; }
.site-logo { font-weight: 600; text-decoration: none; color: var(--fg); font-size: 1.05rem; }
main { padding: 40px 0 60px; }
.page-title { font-size: 1.6rem; margin-bottom: 4px; }
.policy-meta { color: var(--muted); font-size: 0.9rem; margin-top: 0; }
h2 { font-size: 1.05rem; margin-top: 2em; }
a { color: var(--link); }
hr { border: none; border-top: 1px solid var(--border); margin: 1.5em 0; }
footer.site-footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: 0.85rem; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181c; --fg: #ecedee; --muted: #9a9fa6; --border: #2a2d33; --link: #6ea8fe; }
}