/* FogBow site. System fonts only; sizes in rem so text scales with browser zoom and settings.
   Colours meet WCAG AA contrast in both light (text ≈ 15:1, links ≈ 7:1) and dark schemes. */
:root {
  --bg: #ffffff;
  --text: #1c2430;
  --muted: #4a5565;
  --link: #0a58a8;
  --rule: #d5dbe3;
  --note-bg: #eef3f8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --text: #e8ecf1;
    --muted: #b4bdc9;
    --link: #8cc4ff;
    --rule: #333c48;
    --note-bg: #1c2430;
  }
}
* { box-sizing: border-box; }
html { font-size: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}
header, main, footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}
header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}
.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
nav a[aria-current="page"] { font-weight: 600; text-decoration: none; color: var(--text); }
main { padding-top: 1.5rem; padding-bottom: 2.5rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.375rem; line-height: 1.3; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.125rem; line-height: 1.35; margin: 1.5rem 0 0.25rem; }
p, ul { margin: 0 0 1rem; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.35rem; }
a { color: var(--link); text-underline-offset: 0.15em; overflow-wrap: anywhere; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 2px; border-radius: 2px; }
.lead { font-size: 1.25rem; color: var(--text); }
.note {
  display: inline-block;
  background: var(--note-bg);
  border-radius: 0.5rem;
  padding: 0.5rem 0.9rem;
  font-weight: 600;
}
footer {
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
  padding-bottom: 2rem;
  color: var(--muted);
  font-size: 0.9375rem;
}
.skip {
  position: absolute;
  left: -999rem;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--bg);
  padding: 0.5rem 0.75rem;
  z-index: 1;
}