:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --accent: #0d47a1;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f10;
    --surface: #1a1a1c;
    --border: #2a2a2e;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #5b9bf5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
h1 {
  font-size: 1.6rem;
  margin-bottom: 4px;
}
.updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}
h2 {
  font-size: 1.1rem;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--accent);
}
h3 {
  font-size: 0.95rem;
  margin-top: 20px;
  margin-bottom: 8px;
}
p, li { font-size: 0.95rem; }
ul { padding-left: 20px; }
li { margin-bottom: 6px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}
a { color: var(--accent); }
.contact {
  font-weight: 600;
}
.footer-note {
  margin-top: 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
}