:root {
  --measure: 42rem;
  --ink: #17202a;
  --paper: #fdfcf9;
  --muted: #5c6570;
  --accent: #2f6f5e;
  --rule: #e3e0d8;
}
* { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
main { max-width: var(--measure); margin: 0 auto; padding: 2rem 1.25rem 4rem; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 2rem; margin: 0 0 1rem; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.25rem; }
p { margin: 0 0 1rem; }
a { color: var(--accent); }
.lede { font-size: 1.15rem; color: var(--muted); }
.meta { color: var(--muted); font-size: 0.95rem; margin: 0 0 0.5rem; }

header {
  border-bottom: 1px solid var(--rule);
}
header nav {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
}
.site-name { font-weight: 700; text-decoration: none; color: var(--ink); }
header ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}
header a[aria-current="page"] { font-weight: 700; text-decoration: none; }

footer {
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}
footer p { max-width: var(--measure); margin: 0 auto; padding: 1.5rem 1.25rem; }

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 0.5rem;
  background: var(--paper);
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--accent);
}

@media (max-width: 30rem) {
  h1 { font-size: 1.6rem; }
  main { padding-top: 1.25rem; }
}