:root {
  color-scheme: light dark;
  --bg: #faf9f6;
  --panel: #fff;
  --text: #202124;
  --muted: #64686d;
  --line: #d8d9da;
  --accent: #176a52;
  --code: #efeee9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, sans-serif;
}

.site-header,
main,
footer {
  max-width: 72rem;
  margin: auto;
  padding: 1.25rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 750;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

a {
  color: var(--accent);
  text-underline-offset: .18em;
}

main {
  min-height: 75vh;
  padding-top: 3rem;
  padding-bottom: 4rem;
}

main > * { max-width: 48rem; }
h1, h2, h3 { line-height: 1.2; }

h1 {
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  letter-spacing: -.04em;
}

.hero { padding: 3rem 0; }
.hero p { font-size: 1.25rem; }

.eyebrow {
  color: var(--accent);
  font-size: .85rem !important;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  max-width: 72rem;
}

.cards article {
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: .5rem;
}

.cards h3 { margin-top: 0; }
.reference-links, .search-results { padding: 0; list-style: none; }

.reference-links a {
  display: flex;
  justify-content: space-between;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line);
}

.provenance {
  padding-bottom: 1rem;
  color: var(--muted);
  font-size: .9rem;
  border-bottom: 1px solid var(--line);
}

pre, code { background: var(--code); border-radius: .2rem; }
code { padding: .1rem .3rem; }
pre { padding: 1rem; overflow: auto; }
pre code { padding: 0; }

input,
select {
  margin: .25rem 1rem 1rem 0;
  padding: .65rem;
  color: var(--text);
  font: inherit;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: .25rem;
}

.search-results li { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.search-results small { display: block; color: var(--muted); }
footer { color: var(--muted); border-top: 1px solid var(--line); }
.skip-link { position: absolute; left: -9999px; }

.skip-link:focus {
  top: 1rem;
  left: 1rem;
  z-index: 2;
  padding: .5rem;
  background: var(--panel);
}

@media (max-width: 38rem) {
  .site-header { align-items: flex-start; gap: 1rem; flex-direction: column; }
  main { padding-top: 1.5rem; }
  h1 { font-size: 2.5rem; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171918;
    --panel: #202321;
    --text: #ecf0ed;
    --muted: #adb5b0;
    --line: #3a403c;
    --accent: #71d4b2;
    --code: #262a27;
  }
}