:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
  --ok: #059669;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #171a21;
    --text: #e8eaf0;
    --muted: #9aa1ad;
    --accent: #5b8cff;
    --border: #262b36;
    --ok: #34d399;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
header.site {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 1.2rem 1rem;
}
header.site a.brand { color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.1rem; }
header.site a.brand span { color: var(--accent); }
a.cta-button {
  background: var(--accent);
  color: #fff;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.95rem;
}
main { max-width: 720px; margin: 0 auto; padding: 0 1rem 4rem; }
article h1 { font-size: 1.7rem; line-height: 1.25; margin: 1rem 0 0.5rem; }
article .byline { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
article h2 { font-size: 1.25rem; margin-top: 2rem; }
article a { color: var(--accent); }
article code {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-size: 0.9em;
}
.callout {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
}
.cta {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.3rem;
  margin: 2rem 0;
  text-align: center;
}
.cta p { margin: 0 0 0.9rem; }
ol.steps li, ul li { margin-bottom: 0.5rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin: 1.5rem 0; }
th, td { border: 1px solid var(--border); padding: 0.5rem 0.6rem; text-align: left; vertical-align: top; }
th { background: var(--card); }
td.y { color: var(--ok); font-weight: 600; }
td.n { color: var(--muted); }
.table-scroll { overflow-x: auto; }
footer.site {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}
footer.site a { color: var(--accent); text-decoration: none; }
footer.site ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 1.2rem; }