:root {
  --bg: #fafafa;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #2563eb;
  --border: #e5e5e5;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --card: #1b1d21;
    --text: #ececec;
    --muted: #9a9a9a;
    --accent: #7aa2ff;
    --border: #2c2f35;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
h1 { font-size: 1.75rem; margin-bottom: 4px; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; letter-spacing: -0.01em; }
p { margin: 10px 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); font-size: 0.9rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 12px 0;
}
.card h3 { font-size: 1rem; margin-bottom: 2px; }
.card .links { margin-top: 6px; font-size: 0.9rem; }
.card .links a + a { margin-left: 16px; }
ul { padding-left: 22px; margin: 10px 0; }
li { margin: 6px 0; }
.footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--border); }
.crumb { font-size: 0.85rem; margin-bottom: 24px; display: inline-block; }
details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 10px 0;
  background: var(--card);
}
summary { cursor: pointer; font-weight: 600; }
details p { margin-top: 8px; }