/* ============================================================
   Attentra documentation styles — shared by /verification and /faq
   ============================================================
   Brand:  ink #1a1613, oxblood #7d2418, paper #ece5d3
   Type:   EB Garamond serif body, JetBrains Mono technical
   ============================================================ */

:root {
  --ink: #1a1613;
  --ink-soft: #2c2622;
  --oxblood: #7d2418;
  --oxblood-soft: #a23a2c;
  --paper: #ffffff;
  --paper-deep: #ddd4be;
  --rule: #c9bfa6;
  --muted: #6e6253;
  --highlight: #f3e8c4;

  --serif: "EB Garamond", "Georgia", "Times New Roman", serif;
  --mono: "JetBrains Mono", "Consolas", "Menlo", monospace;

  --measure-narrow: 38rem;
  --measure-wide: 52rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ============================================================
   Shared header — appears on both pages
   ============================================================ */

.doc-header {
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem 2rem;
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(6px);
}

.doc-header-inner {
  max-width: var(--measure-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.doc-mark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.doc-mark::before {
  content: "▲";
  color: var(--oxblood);
  margin-right: 0.5rem;
  font-size: 0.85em;
  display: inline-block;
  transform: translateY(-1px);
}

.doc-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.doc-nav a {
  color: var(--muted);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 150ms ease;
}

.doc-nav a:hover { color: var(--oxblood); }
.doc-nav a.is-active { color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 2px; }

/* ============================================================
   Page-level layout
   ============================================================ */

.page {
  max-width: var(--measure-wide);
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
}

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 0.75rem;
}

.page-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

.page-deck {
  font-size: 1.15rem;
  max-width: var(--measure-narrow);
  color: var(--ink-soft);
  margin-bottom: 4rem;
  font-style: italic;
  line-height: 1.5;
}

/* ============================================================
   Section blocks
   ============================================================ */

.section {
  max-width: var(--measure-narrow);
  margin: 0 auto 4rem;
}

.section--wide {
  max-width: var(--measure-wide);
}

.section-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

.section-lead {
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin-bottom: 2rem;
  line-height: 1.55;
}

.section p {
  margin-bottom: 1.1rem;
}

/* ============================================================
   Layer cards (verification page)
   ============================================================ */

.layers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2.5rem 0;
}

.layer {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: var(--paper-deep);
  border-left: 3px solid var(--oxblood);
  transition: background 200ms ease;
}

.layer:hover {
  background: var(--highlight);
}

.layer-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--oxblood);
  padding-top: 0.35rem;
  white-space: nowrap;
  font-weight: 500;
}

.layer-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.005em;
}

.layer-body p {
  font-size: 1rem;
  margin-bottom: 0.6rem;
  color: var(--ink-soft);
}

.layer-body p:last-of-type { margin-bottom: 0.75rem; }

.layer-state {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  margin-top: 0.5rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--rule);
}

.layer-state--solid { color: var(--ink); border-color: var(--ink); }
.layer-state--partial { color: var(--oxblood); border-color: var(--oxblood); }
.layer-state--social { color: var(--muted); border-color: var(--muted); }
.layer-state--scope { color: var(--muted); border-color: var(--muted); font-style: italic; }

/* ============================================================
   Pull-quote
   ============================================================ */

.pull {
  max-width: var(--measure-narrow);
  margin: 3rem auto;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--ink);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.45;
}

/* ============================================================
   Continue link / cross-page navigation
   ============================================================ */

.continue-link {
  display: block;
  max-width: var(--measure-narrow);
  margin: 4rem auto 0;
  padding: 1.5rem 2rem;
  background: var(--paper-deep);
  text-decoration: none;
  color: var(--ink);
  border-left: 3px solid var(--ink);
  transition: background 200ms ease;
}

.continue-link:hover {
  background: var(--highlight);
}

.continue-link-eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  margin-bottom: 0.5rem;
}

.continue-link-title {
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.continue-link-arrow::after {
  content: " →";
  color: var(--oxblood);
  font-family: var(--mono);
}

.continue-link-deck {
  font-size: 1rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* ============================================================
   Code blocks
   ============================================================ */

.codeblock {
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.55;
  overflow-x: auto;
}

.codeblock .prompt { color: var(--rule); }
.codeblock .agree { color: #94c47d; }
.codeblock .disagree { color: var(--oxblood-soft); }
.codeblock .comment { color: var(--muted); font-style: italic; }

/* ============================================================
   FAQ section + entries
   ============================================================ */

.faq-cluster-title {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--oxblood);
  padding-top: 1.75rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-top: 1px solid var(--rule);
}

.faq-cluster-title:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

details.faq {
  border-bottom: 1px solid var(--rule);
  padding: 1.4rem 0;
}

details.faq summary {
  cursor: pointer;
  font-size: 1.18rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.5rem;
  transition: color 150ms ease;
  line-height: 1.35;
}

details.faq summary::-webkit-details-marker { display: none; }
details.faq summary:hover { color: var(--oxblood); }

details.faq summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--oxblood);
  transition: transform 200ms ease;
  flex-shrink: 0;
}

details.faq[open] summary::after {
  content: "−";
}

details.faq .answer {
  padding-top: 1rem;
  max-width: var(--measure-narrow);
  color: var(--ink-soft);
  line-height: 1.6;
}

details.faq .answer p { margin-bottom: 0.85rem; }
details.faq .answer p:last-child { margin-bottom: 0; }

details.faq .answer code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--paper-deep);
  padding: 0.05rem 0.35rem;
  border-radius: 2px;
  color: var(--ink);
}

/* The "deeper detail" inline link — leads to the methodology paper section */

.deeper {
  display: block;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-top: 1rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--rule);
}

.deeper a {
  color: var(--oxblood);
  text-decoration: none;
  border-bottom: 1px solid var(--oxblood);
  padding-bottom: 1px;
}

.deeper a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.deeper-arrow::after {
  content: " ↗";
  color: var(--oxblood);
}

/* ============================================================
   Footer
   ============================================================ */

.doc-footer {
  border-top: 1px solid var(--rule);
  padding: 3rem 2rem 2rem;
  margin-top: 4rem;
}

.doc-footer-inner {
  max-width: var(--measure-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.85rem;
  color: var(--muted);
  gap: 2rem;
  flex-wrap: wrap;
}

.doc-footer a {
  color: var(--oxblood);
  text-decoration: none;
  border-bottom: 1px solid var(--oxblood);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 640px) {
  .doc-header { padding: 1rem 1.25rem; }
  .doc-header-inner { gap: 1rem; }
  .doc-nav { gap: 1rem; }
  .doc-nav a { font-size: 0.72rem; }

  .page { padding: 2.5rem 1.25rem 4rem; }

  .layer { grid-template-columns: 1fr; gap: 0.5rem; padding: 1.25rem 1.25rem; }
  .layer-num { padding-top: 0; }

  details.faq summary { font-size: 1.05rem; gap: 1rem; }
  .pull { padding: 1rem 1.25rem; font-size: 1.1rem; }

  .doc-footer-inner { flex-direction: column; gap: 0.5rem; }
}