/* ARDD — LLM Edition. Text-first, zero-JS, CSS-optional stylesheet. */

:root {
  --paper: #f7f4ec;
  --ink: #171915;
  --muted: #5d6259;
  --rule: #c9c5b8;
  --accent: #315c4b;
  --accent-soft: #e3ece6;
  --code-bg: #eeece4;

  --font-body: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14160f;
    --ink: #e9e6d9;
    --muted: #9aa08f;
    --rule: #3a3d33;
    --accent: #7fd9ab;
    --accent-soft: #1d2a22;
    --code-bg: #1c1e17;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.62;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--paper);
  padding: 0.5em 1em;
  z-index: 10;
}
.skip-link:focus { left: 0.5em; top: 0.5em; }

header.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 1.25rem 1rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

nav.primary-nav {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  margin-top: 0.6rem;
}
nav.primary-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  padding: 0;
  margin: 0;
}
nav.primary-nav a { color: var(--ink); text-decoration: none; border-bottom: 1px dotted var(--rule); }
nav.primary-nav a:hover { border-bottom-color: var(--accent); color: var(--accent); }

main {
  max-width: 72ch;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

main.wide { max-width: 110rem; }

h1, h2, h3, h4 {
  font-family: var(--font-ui);
  font-weight: 750;
  line-height: 1.22;
  color: var(--ink);
}
h1 { font-size: 2.1rem; margin: 0.4rem 0 0.6rem; }
h2 { font-size: 1.45rem; margin-top: 2.4rem; border-top: 1px solid var(--rule); padding-top: 1.2rem; }
h3 { font-size: 1.12rem; margin-top: 1.6rem; }
h2 a.anchor, h3 a.anchor { font-family: var(--font-mono); color: var(--muted); text-decoration: none; margin-left: 0.4em; font-size: 0.8em; }

p { margin: 0.9em 0; }

.doc-meta {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  background: var(--accent-soft);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0 1.6rem;
}
.doc-meta dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.15rem 1rem; margin: 0; }
.doc-meta dt { color: var(--muted); }
.doc-meta dd { margin: 0; }

.status { font-family: var(--font-mono); font-size: 0.82em; padding: 0.05em 0.4em; border: 1px solid var(--rule); border-radius: 3px; }
.status.final { color: var(--accent); border-color: var(--accent); }
.status.preliminary { color: #8a6d1a; border-color: #8a6d1a; }
.status.tba { color: var(--muted); }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.1rem 0;
  font-size: 0.95rem;
}
caption { text-align: left; font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); margin-bottom: 0.4rem; }
th, td {
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
thead th { font-family: var(--font-ui); font-size: 0.86rem; border-bottom: 2px solid var(--ink); }
td.time, th.time, td.id, th.id { font-family: var(--font-mono); font-size: 0.88em; white-space: nowrap; }
tbody tr:nth-child(even) { background: rgba(0,0,0,0.02); }

dl.factsheet { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1.2rem; }
dl.factsheet dt { font-family: var(--font-ui); color: var(--muted); }
dl.factsheet dd { margin: 0; }

article.record {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.1rem 1.3rem;
  margin: 1.1rem 0;
}
article.record h3 { margin-top: 0; }

.toc { font-family: var(--font-ui); font-size: 0.92rem; background: var(--code-bg); border: 1px solid var(--rule); border-radius: 6px; padding: 1rem 1.3rem; }
.toc ol { margin: 0.4rem 0 0; padding-left: 1.3rem; }

hr.rule { border: none; border-top: 1px solid var(--rule); margin: 2.2rem 0; }

code, .mono { font-family: var(--font-mono); }

a { color: var(--accent); }
a:visited { color: var(--accent); }

footer.site-footer {
  border-top: 1px solid var(--rule);
  font-family: var(--font-ui);
  font-size: 0.86rem;
  color: var(--muted);
  padding: 1.6rem 1.25rem 3rem;
}
footer.site-footer .links { display: flex; flex-wrap: wrap; gap: 0.8rem 1.2rem; margin-bottom: 0.9rem; }
footer.site-footer a { color: var(--muted); }
footer.site-footer a:hover { color: var(--accent); }

@media print {
  header.site-header, footer.site-footer, nav.primary-nav { display: none; }
  body { background: #fff; color: #000; }
  a { color: #000; text-decoration: underline; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  main { padding: 1.4rem 1rem 3rem; }
}