/* Hallmark · genre: editorial · macrostructure: Long Document · theme: Almanac · enrichment: E5 tier-B SVG · nav: N6 · footer: Ft4 · contrast: pass (40–41) · slop: pass (42–45) · 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 {
  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: 1.78;
  text-rendering: optimizeLegibility;
}

a { color: var(--color-accent-deep); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: var(--rule-strong); }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

button {
  min-height: 44px;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  font: inherit;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}

button:hover { background: var(--color-accent-pale); }
button:active { transform: translateY(1px); }
button:disabled { cursor: not-allowed; opacity: 0.55; }

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: 100;
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-200%);
}

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

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 90;
  height: 3px;
  background: transparent;
}

.reading-progress__fill {
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
}

.nav-mast {
  padding: var(--space-sm) clamp(var(--space-sm), 5vw, var(--space-xl)) 0;
  text-align: center;
}

.mast-line {
  margin: 0;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.mast-name {
  margin: var(--space-2xs) 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6vw, 3.8rem);
  font-style: normal;
  font-weight: 800;
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.mast-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2xs) var(--space-md);
  align-items: center;
}

.mast-nav a,
.mast-nav button {
  font-size: var(--text-sm);
  font-weight: 700;
  white-space: nowrap;
}

.mast-nav button { padding: var(--space-3xs) var(--space-xs); }

.mast-rule {
  height: 5px;
  margin: var(--space-sm) 0 0;
  border: 0;
  border-block: var(--rule-hair) solid var(--color-rule);
}

.breadcrumb {
  width: min(100% - 2rem, 74rem);
  margin: var(--space-sm) auto 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.breadcrumb a,
.breadcrumb span { white-space: nowrap; }
.breadcrumb span + span,
.breadcrumb a + span { margin-inline-start: var(--space-2xs); }

.page-shell {
  width: min(100% - 2rem, 74rem);
  margin-inline: auto;
}

.hero-art {
  display: grid;
  gap: var(--space-xl);
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

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

.hero-kicker {
  margin: 0 0 var(--space-sm);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  line-height: 1.22;
  text-wrap: balance;
  overflow-wrap: anywhere;
  min-width: 0;
}

h1 {
  max-width: 10ch;
  margin: 0;
  font-size: var(--text-display-s);
  letter-spacing: -0.045em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.lede {
  max-width: 38rem;
  margin: var(--space-md) 0 0;
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1.65;
}

.memory-art {
  width: 100%;
  max-width: 32rem;
  height: auto;
  justify-self: center;
  color: var(--color-ink);
}

.memory-art .axis,
.memory-art .guide {
  fill: none;
  stroke: var(--color-rule);
  stroke-width: 1.5;
}

.memory-art .trace {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.memory-art .trace-faint { opacity: 0.34; }
.memory-art .review-mark { fill: var(--color-paper); stroke: var(--color-accent-deep); stroke-width: 3; }
.memory-art text { fill: var(--color-ink-soft); font-family: var(--font-body); font-size: 12px; }

.art-caption {
  max-width: 32rem;
  margin: var(--space-sm) auto 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.article-flow {
  width: min(100%, 65ch);
  margin-inline: auto;
  padding-block: var(--space-2xl);
}

.article-flow p { margin: 0 0 var(--space-md); }

.article-flow h2 {
  margin: var(--space-2xl) 0 var(--space-md);
  font-size: var(--text-2xl);
}

.article-flow h3 {
  margin: var(--space-xl) 0 var(--space-sm);
  font-size: var(--text-xl);
}

.head-inline {
  color: var(--color-accent-deep);
  font-family: var(--font-display);
  font-variant-caps: all-small-caps;
  font-weight: 800;
  letter-spacing: 0.04em;
}

dfn {
  font-style: normal;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--rule-strong);
  text-underline-offset: 0.2em;
}

.margin-note,
.evidence-note {
  margin-block: var(--space-xl);
  padding: var(--space-md);
  border-inline-start: 4px solid var(--color-accent);
  background: var(--color-note);
}

.margin-note p:last-child,
.evidence-note p:last-child { margin-block-end: 0; }

blockquote {
  margin: var(--space-xl) 0;
  padding: var(--space-sm) 0 var(--space-sm) var(--space-lg);
  border-inline-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: var(--text-xl);
}

.source-ref { font-family: var(--font-body); font-size: var(--text-xs); white-space: nowrap; }

.sequence {
  margin: var(--space-xl) 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
  border-block: var(--rule-hair) solid var(--color-rule);
}

.sequence li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: var(--space-sm);
  padding-block: var(--space-md);
  border-block-end: var(--rule-hair) solid var(--color-rule);
  counter-increment: steps;
}

.sequence li:last-child { border-block-end: 0; }
.sequence li::before {
  content: counter(steps, decimal-leading-zero);
  color: var(--color-accent-deep);
  font-family: var(--font-body);
  font-weight: 700;
}

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

.decision-table {
  width: 100%;
  margin-block: var(--space-xl);
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.decision-table th,
.decision-table td {
  padding: var(--space-xs);
  border-block-end: var(--rule-hair) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

.decision-table th { font-family: var(--font-display); }

.practice-lab {
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-deep);
}

.practice-lab h2 { margin-block-start: 0; }
.prompt-card {
  min-height: 9rem;
  padding: var(--space-md);
  background: var(--color-paper-raised);
  box-shadow: 0 8px 24px var(--color-shadow);
}

.prompt-card [data-answer] { margin-block-end: 0; }
.prompt-card [hidden] { display: none; }
.lab-actions { display: flex; flex-wrap: wrap; gap: var(--space-2xs); margin-block-start: var(--space-sm); }
.lab-actions button { padding-inline: var(--space-sm); }
.lab-status { min-height: 1.8em; color: var(--color-ink-soft); font-size: var(--text-sm); }

.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  width: min(100% - 2rem, 74rem);
  margin: 0 auto var(--space-2xl);
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.chapter-nav a {
  display: block;
  min-width: 0;
  padding: var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}

.chapter-nav a:hover { background: var(--color-accent-pale); }

.source-list { margin: 0; padding-inline-start: var(--space-lg); }
.source-entry { padding: 0 0 var(--space-lg) var(--space-2xs); }
.source-entry h2 { margin: 0 0 var(--space-xs); font-size: var(--text-xl); }
.source-entry a { overflow-wrap: anywhere; }

.foot-dense {
  padding: var(--space-lg) clamp(var(--space-sm), 5vw, var(--space-xl));
  border-block-start: 5px double var(--color-rule);
  background: var(--color-paper-deep);
}

.foot-dense p {
  max-width: 84rem;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
}

.foot-dense a { white-space: nowrap; }

@media (min-width: 40rem) {
  .page-shell { width: min(100% - 4rem, 74rem); }
  .hero-art { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: center; }
  .chapter-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); width: min(100% - 4rem, 74rem); }
  .chapter-nav a:last-child { text-align: end; }
}

@media (min-width: 60rem) {
  .hero-art { padding-block: var(--space-2xl) var(--space-3xl); }
  .article-flow { padding-block: var(--space-3xl); }
  .margin-note { margin-inline: -5rem 0; width: calc(100% + 5rem); }
}

@media (max-width: 31rem) {
  .mast-nav .section-link { display: none; }
  .breadcrumb { display: flex; overflow-x: auto; }
  .sequence li { grid-template-columns: 2.25rem minmax(0, 1fr); }
  .decision-table,
  .decision-table tbody,
  .decision-table tr,
  .decision-table td { display: block; }
  .decision-table thead { position: absolute; inline-size: 1px; block-size: 1px; overflow: clip; clip-path: inset(50%); }
  .decision-table tr { padding-block: var(--space-sm); border-block-end: var(--rule-hair) solid var(--color-rule); }
  .decision-table td { border: 0; padding: var(--space-3xs) 0; }
  .decision-table td::before { content: attr(data-label) "："; color: var(--color-muted); font-family: var(--font-body); }
}

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

@media print {
  .skip-link, .reading-progress, .mast-nav button, .chapter-nav { display: none; }
  body { background: var(--color-paper); color: var(--color-ink); font-size: 11pt; }
  .nav-mast { padding-block-start: 0; }
  a { color: var(--color-ink); }
}