/* Hallmark · macrostructure: Map / Diagram · genre: editorial · theme: Almanac · tone: analytical economy · anchor hue: ledger red · enrichment: Tier-A CSS risk map · nav: N9 · footer: Ft4 · contrast: pass (40–41) · slop: pass (1–58) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57) */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5 */
@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.68;
}
a { color: var(--color-accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: var(--rule-thick); }
a:active { color: var(--color-ink); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}
button { font: inherit; }
button:active { transform: translateY(var(--rule-thin)); }
button:disabled, [aria-disabled="true"] { cursor: not-allowed; opacity: 0.55; }
dfn { font-style: normal; font-weight: 700; }
.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: 600;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-200%);
}
.skip-link:focus { transform: none; }
.nav-edge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--page-gutter);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}
.wordmark {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.wordmark-prefix { display: none; }
.nav-actions { display: flex; align-items: center; gap: var(--space-xs); }
.overview-link { display: none; }
.overview-link, .menu-button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-sm);
  border: var(--rule-thin) solid var(--color-rule-strong);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.menu-button { cursor: pointer; }
.menu-button:hover { background: var(--color-paper-2); }
.chapter-strip {
  display: none;
  padding: 0 var(--page-gutter);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}
.chapter-strip[data-open="true"] { display: block; }
.chapter-strip ul {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: var(--space-xs) 0;
  list-style: none;
}
.chapter-strip a {
  display: inline-flex;
  width: 100%;
  align-items: center;
  min-height: 44px;
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.chapter-strip a[aria-current="page"] { color: var(--color-accent); box-shadow: inset 0 calc(var(--rule-thick) * -1) 0 var(--color-accent); }
.page-shell { width: min(100%, 78rem); margin-inline: auto; padding-inline: var(--page-gutter); }
.breadcrumb {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  min-height: 44px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  white-space: nowrap;
  line-height: 1;
}
.breadcrumb a { color: inherit; }
.hero {
  display: grid;
  gap: var(--space-xl);
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-end: var(--rule-thick) solid var(--color-ink);
}
.hero-copy { min-width: 0; }
.hero h1, .chapter-heading h1 {
  max-width: 13ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 14vw, 3.4rem);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.04;
  overflow-wrap: anywhere;
  min-width: 0;
}
.hero-lede, .chapter-heading .lede {
  max-width: 62ch;
  margin: var(--space-lg) 0 0;
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1.45;
}
.ledger-mark {
  align-self: end;
  padding: var(--space-lg);
  border: var(--rule-thin) solid var(--color-rule-strong);
  background-color: var(--color-paper-2);
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent calc(var(--space-lg) - var(--rule-thin)), var(--color-rule) calc(var(--space-lg) - var(--rule-thin)), var(--color-rule) var(--space-lg));
}
.ledger-mark strong { display: block; font-family: var(--font-display); font-size: var(--text-xl); }
.ledger-mark span { font-family: var(--font-mono); font-size: var(--text-sm); color: var(--color-muted); }
.prose-layout { display: grid; gap: var(--space-xl); padding-block: var(--space-xl) var(--space-2xl); }
.toc {
  border-block: var(--rule-thin) solid var(--color-rule);
  padding-block: var(--space-sm);
}
.toc strong { font-family: var(--font-mono); font-size: var(--text-xs); }
.toc ul { margin: var(--space-xs) 0 0; padding-inline-start: var(--space-lg); }
.toc a { white-space: nowrap; }
.prose { min-width: 0; }
.prose section { margin-block-end: var(--space-2xl); }
.prose h2 {
  max-width: 22ch;
  margin: 0 0 var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: normal;
  line-height: 1.15;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.prose h3 {
  margin: var(--space-xl) 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  line-height: 1.25;
}
.prose p, .prose li { max-width: 68ch; }
.prose p { margin: 0 0 var(--space-md); }
.prose li + li { margin-block-start: var(--space-xs); }
.margin-note {
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border-block: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}
.margin-note p:last-child { margin-block-end: 0; }
.risk-map {
  display: grid;
  gap: var(--space-sm);
  margin-block: var(--space-xl);
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}
.risk-map__axis {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block-end: var(--space-xs);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}
.risk-map__grid { display: grid; gap: var(--space-sm); }
.risk-node {
  position: relative;
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}
.risk-node::before {
  content: "";
  position: absolute;
  inset-block-start: var(--space-md);
  inset-inline-start: calc(var(--space-xs) * -1);
  width: var(--space-xs);
  height: var(--space-xs);
  background: var(--color-accent);
}
.risk-node h3 { margin: 0 0 var(--space-xs); font-size: var(--text-md); }
.risk-node p { margin: 0; font-size: var(--text-sm); }
.mechanism-flow {
  display: grid;
  gap: var(--space-xs);
  margin-block: var(--space-xl);
  padding: 0;
  list-style: none;
  counter-reset: flow;
}
.mechanism-flow li {
  counter-increment: flow;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-sm);
  align-items: start;
  padding-block: var(--space-sm);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}
.mechanism-flow li::before {
  content: counter(flow, decimal-leading-zero);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 700;
}
.comparison {
  width: 100%;
  border-collapse: collapse;
  margin-block: var(--space-xl);
  font-size: var(--text-sm);
}
.comparison caption { margin-block-end: var(--space-sm); text-align: start; font-family: var(--font-display); font-size: var(--text-md); font-weight: 800; }
.comparison th, .comparison td { padding: var(--space-sm); border-block-end: var(--rule-thin) solid var(--color-rule); text-align: start; vertical-align: top; }
.comparison th { font-family: var(--font-mono); color: var(--color-ink-soft); }
.source-list { padding-inline-start: var(--space-lg); }
.source-list li { margin-block-end: var(--space-lg); }
.source-list small { display: block; color: var(--color-muted); }
.chapter-heading { padding-block: var(--space-2xl) var(--space-xl); border-block-end: var(--rule-thick) solid var(--color-ink); }
.chapter-heading h1 { font-size: clamp(2.3rem, 14vw, 3.4rem); }
.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  margin-block-start: var(--space-2xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-thick) solid var(--color-ink);
}
.chapter-nav a {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.chapter-nav span { color: var(--color-muted); font-family: var(--font-mono); font-size: var(--text-xs); }
.foot-dense {
  margin-block-start: var(--space-2xl);
  padding: var(--space-lg) var(--page-gutter) var(--space-xl);
  border-block-start: var(--rule-thick) solid var(--color-ink);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}
.foot-dense p { max-width: 100ch; margin: 0; }
.foot-dense a { white-space: nowrap; }
.hero, .chapter-heading { padding-block-start: var(--space-xl); }
.comparison, .comparison tbody, .comparison tr, .comparison th, .comparison td { display: block; }
.comparison thead { display: none; }
.comparison tr { padding-block: var(--space-sm); border-block-end: var(--rule-thin) solid var(--color-rule-strong); }
.comparison td { display: grid; grid-template-columns: minmax(7rem, 0.8fr) minmax(0, 1.2fr); gap: var(--space-sm); border: 0; padding: var(--space-xs) 0; }
.comparison td::before { content: attr(data-label); color: var(--color-muted); font-family: var(--font-mono); font-size: var(--text-xs); }

@media (min-width: 40rem) {
  .wordmark { font-size: var(--text-md); }
  .wordmark-prefix { display: inline; }
  .overview-link { display: inline-flex; }
  .menu-button { display: none; }
  .chapter-strip, .chapter-strip[data-open="true"] { display: block; }
  .chapter-strip ul { flex-direction: row; gap: var(--space-lg); padding: 0; }
  .chapter-strip a { width: auto; }
  .hero { grid-template-columns: minmax(0, 1.6fr) minmax(15rem, 0.7fr); }
  .hero h1 { font-size: var(--text-display); }
  .chapter-heading h1 { font-size: var(--text-display-s); }
  .hero-lede, .chapter-heading .lede { font-size: var(--text-lg); }
  .risk-map__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chapter-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .chapter-nav a:nth-child(2) { justify-content: center; }
  .chapter-nav a:last-child { justify-content: flex-end; }
  .comparison { display: table; }
  .comparison thead { display: table-header-group; }
  .comparison tbody { display: table-row-group; }
  .comparison tr { display: table-row; padding: 0; border: 0; }
  .comparison th, .comparison td { display: table-cell; padding: var(--space-sm); border-block-end: var(--rule-thin) solid var(--color-rule); }
  .comparison td::before { content: none; }
}

@media (min-width: 60rem) {
  .prose-layout { grid-template-columns: minmax(11rem, 0.45fr) minmax(0, 1.55fr); align-items: start; }
  .toc { position: sticky; inset-block-start: var(--space-lg); }
  .risk-map__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}