:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --link: #0f766e;
  --border: #e5e7eb;
  --max: 72ch;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  gap: 16px;
  align-items: center;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.muted { color: var(--muted); }
.pill {
  display: inline-block;
  font-size: 12px;
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
  color: var(--muted);
}

article h1 { line-height: 1.15; margin: 0 0 8px; }
article h2 { margin-top: 28px; }
article p { margin: 12px 0; }
article ul { padding-left: 20px; }

footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

footer > div {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
  color: var(--muted);
  font-size: 14px;
}