:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #5b5b62;
  --card: #f5f5f7;
  --border: #e2e2e6;
  --accent: #0a66c2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --fg: #f2f2f4;
    --muted: #a7a7ae;
    --card: #1c1c1f;
    --border: #2c2c30;
    --accent: #6cb2ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
header { margin-bottom: 36px; }
.badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
h1 { font-size: 30px; margin: 0 0 8px; line-height: 1.2; }
.sub { color: var(--muted); font-size: 17px; margin: 0; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
h2 { font-size: 19px; margin: 36px 0 12px; }
.ruled h2 { border-top: 1px solid var(--border); padding-top: 24px; }
.ruled h2:first-of-type { border-top: none; padding-top: 0; }
h3 { font-size: 16px; margin: 24px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin-bottom: 16px;
}
.card h2 { margin-top: 0; }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); margin: 20px 0 8px; }
.grid .card { margin-bottom: 0; }
.grid h3 { margin-top: 0; }
.grid p { font-size: 14px; color: var(--muted); margin-bottom: 0; }
details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 10px;
}
summary { font-weight: 600; cursor: pointer; }
summary::marker { color: var(--accent); }
details p { margin-top: 10px; color: var(--muted); }
details p:last-child { margin-bottom: 0; }
.note {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  font-size: 14px;
  color: var(--muted);
  margin: 20px 0;
}
.email { font-size: 18px; font-weight: 600; }
nav.links { margin: 28px 0 0; font-size: 15px; }
nav.links a { margin-right: 18px; font-weight: 600; }
footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}
footer a { margin: 0 4px; }