:root {
  --bg: #f4f6f8;
  --ink: #1a1f24;
  --muted: #5c6b7a;
  --card: #ffffff;
  --line: #d8e0e8;
  --shadow: 0 10px 28px rgba(26, 31, 36, 0.08);
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.site-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1.25rem;
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header a.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
}
.site-header .brand-text {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.site-header .brand-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 500;
}
.site-main {
  flex: 1;
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
}
.site-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 0.8rem;
}

.site-header .site-logo { height: 36px; width: auto; display: block; }
.site-header .brand-text .site-logo { height: 30px; display: inline-block; vertical-align: middle; }
@media (max-width: 480px) { .site-header .site-logo { height: 28px; } }

/* basics pass: a11y + footer nav */
.skip-link{position:absolute;left:.75rem;top:-3rem;z-index:100;background:#1a1f24;color:#fff;padding:.55rem .9rem;border-radius:8px;text-decoration:none;font-weight:600}
.skip-link:focus{top:.75rem}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #2563eb;outline-offset:2px;border-radius:4px}
.site-footer{flex-wrap:wrap}
.footer-nav{display:flex;gap:.4rem;align-items:center;margin-right:auto}
.footer-nav a{color:inherit;text-decoration:underline;text-underline-offset:2px}
.prose{max-width:46rem;line-height:1.6}.prose h2{margin-top:2rem}
.draft-banner{background:#fef3c7;color:#713f12;border:1px solid #f59e0b;border-radius:10px;padding:.75rem 1rem;margin-bottom:1.25rem}