:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --border: #e5e5ea;
  --accent: #0a84ff;
  --surface: #f7f7f8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f2f2f7;
    --muted: #9a9aa0;
    --border: #2c2c2e;
    --surface: #1c1c1e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}
h1 { font-size: 1.6rem; margin-bottom: 4px; }
.updated { color: var(--muted); font-size: 0.9rem; margin-bottom: 40px; }
.lead { color: var(--muted); font-size: 1.05rem; margin: 12px 0 36px; }
h2 {
  font-size: 1.15rem;
  margin-top: 40px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
h3 { font-size: 1rem; margin-top: 24px; }
p, li { color: var(--fg); }
ul { padding-left: 1.4em; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 0.95rem; }
.link-list { list-style: none; padding: 0; }
.link-list li { margin: 12px 0; }
.link-list a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 600;
  text-decoration: none;
}
footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-bottom: 8px; }