/* Hallmark · macrostructure: Map / Diagram · genre: editorial · theme: Garden · audience: general · use: continuous health learning · nav: N9 edge-aligned minimal · footer: Ft4 dense typographic */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 */
/* Hallmark · contrast: pass (40–41) · slop: pass (1–58) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (34, 49–57) · icons: pass (30) */
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;700&family=Noto+Serif+SC:wght@400;700;900&display=swap");
@import url("tokens.css");

*, *::before, *::after { box-sizing: border-box; }

html,
body {
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
}

html { scroll-behavior: smooth; }

body {
  min-width: 20rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-thickness: var(--rule-thin); text-underline-offset: 0.22em; }
a:hover { color: var(--color-accent); }
a:active { color: var(--color-accent); }

button {
  font: inherit;
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: var(--rule-strong) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-modal);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-180%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) clamp(var(--space-md), 4vw, var(--space-2xl));
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.wordmark,
.menu-button,
.menu-close,
.theme-button {
  white-space: nowrap;
}

.wordmark {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 900;
  text-decoration: none;
}

.menu-button,
.menu-close,
.theme-button {
  min-height: 2.75rem;
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-small);
  padding: var(--space-xs) var(--space-md);
  background: transparent;
  cursor: pointer;
  transition: color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.menu-button:hover,
.menu-close:hover,
.theme-button:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.menu-button:active,
.menu-close:active,
.theme-button:active { transform: translateY(1px); }

.menu-button:disabled,
.menu-close:disabled,
.theme-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  color: var(--color-muted);
}

.site-menu {
  width: min(38rem, calc(100% - (2 * var(--space-md))));
  max-height: calc(100dvh - (2 * var(--space-md)));
  margin: auto;
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-medium);
  padding: 0;
  background: var(--color-paper-raised);
  color: var(--color-ink);
  box-shadow: var(--shadow-menu);
}

.site-menu::backdrop { background: var(--color-overlay); }

.menu-inner {
  display: grid;
  gap: var(--space-xl);
  padding: var(--space-lg);
}

.menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  padding-block-end: var(--space-md);
}

.menu-head strong { font-family: var(--font-display); font-size: var(--text-lg); }

.menu-links { display: grid; gap: var(--space-sm); }

.menu-links a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-md);
  align-items: baseline;
  min-height: 2.75rem;
  border-block-end: var(--rule-thin) solid var(--color-rule);
  padding-block: var(--space-sm);
  text-decoration: none;
}

.menu-links a[aria-current="page"] { color: var(--color-accent); }
.menu-index { font-family: var(--font-outlier); color: var(--color-muted); }
.menu-links a span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.page-shell {
  width: min(100% - (2 * var(--space-md)), 76rem);
  margin-inline: auto;
}

.breadcrumb {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  min-height: 2.75rem;
  overflow-x: auto;
  padding-block: var(--space-sm);
  color: var(--color-muted);
  font-size: var(--text-sm);
  white-space: nowrap;
  scrollbar-width: thin;
}

.breadcrumb a { text-decoration: none; }

.article {
  display: grid;
  gap: var(--space-3xl);
  padding-block: var(--space-2xl) var(--space-3xl);
}

.hero {
  display: grid;
  gap: var(--space-xl);
  align-items: center;
  padding-block: var(--space-md) var(--space-xl);
}

.hero-copy { min-width: 0; }

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
  min-width: 0;
}

h1 { max-width: 12ch; font-size: clamp(var(--text-2xl), 13vw, var(--text-3xl)); }
h2 { font-size: clamp(var(--text-xl), 4vw, var(--text-3xl)); }
h3 { font-size: var(--text-lg); }

.lede {
  max-width: 52ch;
  margin-block: var(--space-lg) 0;
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1.65;
}

.route-map {
  width: 100%;
  min-width: 0;
  height: auto;
  color: var(--color-ink);
}

.map-line {
  fill: none;
  stroke: var(--color-rule);
  stroke-width: 2;
  stroke-linecap: round;
}

.map-line--accent { stroke: var(--color-accent); }
.map-node { fill: var(--color-paper-raised); stroke: var(--color-ink); stroke-width: 1.5; }
.map-node--accent { fill: var(--color-accent-soft); stroke: var(--color-accent); }
.map-label { fill: var(--color-ink); font-family: var(--font-body); font-size: 15px; font-weight: 700; }
.map-note { fill: var(--color-muted); font-family: var(--font-body); font-size: 11px; }

.prose-grid {
  display: grid;
  gap: var(--space-2xl);
}

.section-copy {
  display: grid;
  gap: var(--space-md);
  max-width: 69ch;
}

.section-copy p,
.callout p,
.source-item p,
.source-intro p {
  margin: 0;
}

.section-copy p { font-size: clamp(var(--text-base), 1.1vw, 1.075rem); }

.section-copy h2,
.section-copy h3 { margin-block-start: var(--space-lg); }

.section-copy h2:first-child,
.section-copy h3:first-child { margin-block-start: 0; }

dfn {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 700;
}

.inline-head {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 0.02em;
}

.callout {
  display: grid;
  gap: var(--space-sm);
  max-width: 60ch;
  border-block: var(--rule-thin) solid var(--color-rule);
  padding-block: var(--space-lg);
}

.callout strong { font-family: var(--font-display); font-size: var(--text-md); }
.callout--safety { border-block-start-color: var(--color-warning); }

.layer-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.layer-list > div {
  display: grid;
  gap: var(--space-xs);
  border-block-start: var(--rule-thin) solid var(--color-rule);
  padding-block: var(--space-md);
}

.layer-list dt { font-family: var(--font-display); font-size: var(--text-md); font-weight: 900; }
.layer-list dd { margin: 0; color: var(--color-ink-soft); }

.table-wrap { overflow: visible; border-block: 0; }

table {
  display: block;
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

tbody,
tr,
th,
td { display: block; }

thead { position: absolute; width: var(--rule-thin); height: var(--rule-thin); overflow: hidden; clip-path: inset(50%); }

tr { border-block-start: var(--rule-thin) solid var(--color-rule); padding-block: var(--space-sm); }

th,
td {
  padding: var(--space-md) var(--space-sm);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

th { font-family: var(--font-display); font-weight: 900; }
td { color: var(--color-ink-soft); }

td {
  display: grid;
  grid-template-columns: minmax(6.5rem, 0.45fr) minmax(0, 1fr);
  gap: var(--space-sm);
  border: 0;
  padding: var(--space-xs) 0;
}

td::before { content: attr(data-label); color: var(--color-muted); font-weight: 700; }

.path-chain {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.path-chain li {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  min-height: 2.75rem;
  border-block-end: var(--rule-thin) solid var(--color-rule);
  padding-inline: var(--space-xs);
}

.path-chain li:not(:last-child)::after { content: "→"; color: var(--color-accent); }

.claim-grid {
  display: grid;
  gap: var(--space-lg);
}

.claim {
  display: grid;
  gap: var(--space-sm);
  border-block-start: var(--rule-thin) solid var(--color-rule);
  padding-block-start: var(--space-md);
}

.claim b { font-family: var(--font-display); font-size: var(--text-md); }

.page-turn {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  border-block-start: var(--rule-strong) solid var(--color-ink);
  padding-block-start: var(--space-lg);
}

.page-turn a {
  min-height: 2.75rem;
  white-space: nowrap;
}

.source-list { display: grid; gap: var(--space-xl); }

.source-item {
  display: grid;
  gap: var(--space-sm);
  border-block-start: var(--rule-thin) solid var(--color-rule);
  padding-block-start: var(--space-md);
}

.source-item h2 { font-size: var(--text-lg); }
.source-item a { width: fit-content; font-weight: 700; white-space: nowrap; }
.source-meta { color: var(--color-muted); font-size: var(--text-sm); }

.site-footer {
  border-block-start: var(--rule-thin) solid var(--color-rule);
  padding: var(--space-xl) clamp(var(--space-md), 4vw, var(--space-2xl));
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.site-footer p { max-width: 82ch; margin: 0; }

@media (min-width: 40rem) {
  .menu-inner { padding: var(--space-xl); }
  h1 { font-size: var(--text-display); }
  .table-wrap { overflow-x: auto; border-block: var(--rule-thin) solid var(--color-rule); }
  table { display: table; }
  thead { position: static; width: auto; height: auto; overflow: visible; clip-path: none; }
  tbody { display: table-row-group; }
  tr { display: table-row; border: 0; padding: 0; }
  th,
  td { display: table-cell; }
  td { border-block-end: var(--rule-thin) solid var(--color-rule); padding: var(--space-md) var(--space-sm); }
  td::before { content: none; }
  .page-turn { flex-direction: row; align-items: center; }
}

@media (min-width: 48rem) {
  .page-shell { width: min(100% - (2 * var(--space-2xl)), 76rem); }
  .hero { grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: var(--space-2xl); }
  .prose-grid { grid-template-columns: minmax(0, 1.65fr) minmax(16rem, 0.7fr); align-items: start; }
  .layer-list > div { grid-template-columns: minmax(8rem, 0.35fr) minmax(0, 1fr); gap: var(--space-lg); }
  .claim-grid { grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr); }
}

@media (min-width: 72rem) {
  .article { padding-block-start: var(--space-3xl); }
  .hero { gap: var(--space-3xl); }
  .section-copy--offset { margin-inline-start: 10%; }
}

@media (pointer: coarse) {
  .menu-button,
  .menu-close,
  .theme-button,
  .menu-links a,
  .page-turn a { min-height: 3rem; }
}

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

@media print {
  .site-header,
  .breadcrumb,
  .page-turn,
  .skip-link { display: none; }
  .article { padding-block: 0; }
  a { text-decoration: none; }
}