:root {
  --max: 720px;
  --fg: #1a1a1a;
  --muted: #555;
  --bg: #fff;
  --link: #0b5cff;
  --rule: #ececec;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  padding: 2.5rem 1.25rem 4rem;
}
main { max-width: var(--max); margin: 0 auto; }
h1 { font-size: 1.75rem; line-height: 1.25; margin: 0 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
p, li { margin: 0.6rem 0; }
ul, ol { padding-left: 1.25rem; }
a { color: var(--link); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
strong { font-weight: 600; }
.meta { color: var(--muted); font-size: 0.95rem; margin-top: 0; }
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.85rem;
}
footer a { color: var(--muted); }