:root {
  --fg: #1a1a1a;
  --muted: #555;
  --link: #1c5fb8;
  --bg: #fdfdfd;
  --rule: #e5e5e5;
  --maxw: 42rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header.site {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
}

header.site a.brand {
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--fg);
}

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding-top: 1rem;
  font-size: 0.875rem;
  color: var(--muted);
}

h1 { font-size: 1.875rem; line-height: 1.25; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.5rem; }

p, ul, ol { margin: 0.75rem 0; }
ul, ol { padding-left: 1.25rem; }
li { margin: 0.25rem 0; }

a { color: var(--link); }
a:hover { text-decoration: underline; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #f3f3f3;
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-size: 0.95em;
}

hr { border: none; border-top: 1px solid var(--rule); margin: 2rem 0; }