/* Hallmark · genre: editorial · macrostructure: Narrative Workflow · theme: Riso · enrichment: E5 tier-A CSS art · nav: N6 · footer: Ft2 · audience: general · use: continuous reading · tone: art-editorial · anchor hue: vermilion
 * contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · mobile: pass (34, 49, 50–57) · icons: pass (30)
 */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5 */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
  background: var(--color-paper);
}

* {
  box-sizing: border-box;
}

::selection {
  background: var(--color-selection);
  color: var(--color-ink);
}

body {
  margin: 0;
  min-width: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--color-accent);
  text-decoration-color: var(--color-rule-strong);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: 0.22em;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

button {
  font: inherit;
}

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

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

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-sticky);
  height: var(--space-2xs);
  background: var(--color-paper-sunken);
}

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

.site-masthead {
  width: min(100% - var(--space-lg), 78rem);
  margin-inline: auto;
  padding-block-start: var(--space-xl);
  text-align: center;
}

.mast-line {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-xs) var(--space-lg);
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-variant-caps: all-small-caps;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.mast-name {
  margin: var(--space-xs) 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 8vw, 4.6rem);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.04;
  overflow-wrap: anywhere;
  min-width: 0;
}

.mast-nav {
  position: relative;
}

.mast-nav ul {
  display: none;
  list-style: none;
  margin: var(--space-xs) 0 0;
  padding: var(--space-sm) 0;
}

.mast-nav.is-open ul {
  display: grid;
  gap: var(--space-xs);
}

.mast-nav a,
.nav-toggle,
.theme-toggle {
  min-height: 2.75rem;
  white-space: nowrap;
}

.mast-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-sm);
  color: var(--color-ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}

.mast-nav a[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: var(--rule-heavy);
  text-underline-offset: var(--space-xs);
}

.mast-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-block: var(--space-xs);
}

.nav-toggle,
.theme-toggle {
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-small);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  cursor: pointer;
  padding-inline: var(--space-md);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-in);
}

.nav-toggle:hover,
.theme-toggle:hover {
  background: var(--color-accent-soft);
}

.nav-toggle:active,
.theme-toggle:active {
  transform: translateY(1px);
}

.nav-toggle:disabled,
.theme-toggle:disabled,
.nav-toggle[aria-disabled="true"],
.theme-toggle[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

.mast-rule {
  height: var(--space-2xs);
  margin: var(--space-sm) 0 0;
  border: 0;
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.page-frame {
  width: min(100% - var(--space-lg), 78rem);
  margin-inline: auto;
  padding-block: var(--space-lg) var(--space-3xl);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}

.breadcrumb a {
  white-space: nowrap;
}

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

.route-rail {
  border-block: var(--rule-hair) solid var(--color-rule);
  padding-block: var(--space-md);
}

.route-rail > p {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-variant-caps: all-small-caps;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.route-rail ol {
  display: grid;
  gap: var(--space-2xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.route-rail a {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  align-items: baseline;
  min-height: 2.75rem;
  padding-block: var(--space-xs);
  color: var(--color-ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 700;
  text-decoration: none;
}

.route-rail a[aria-current="page"] {
  color: var(--color-accent);
}

.route-index {
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.prose {
  min-width: 0;
}

.chapter-head {
  position: relative;
  padding-block: var(--space-lg) var(--space-3xl);
  border-bottom: var(--rule-heavy) solid var(--color-ink);
}

.chapter-kicker {
  max-width: 44ch;
  margin: 0 0 var(--space-lg);
  color: var(--color-accent);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 800;
}

h1,
h2,
h3 {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  min-width: 0;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: var(--text-display-s);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.lede {
  max-width: 58ch;
  margin: var(--space-xl) 0 0;
  color: var(--color-ink-soft);
  font-size: var(--text-md);
  line-height: 1.62;
}

.issue-note {
  margin: var(--space-lg) 0 0;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}

.runway-diagram {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 3.75rem minmax(0, 1fr);
  min-height: 19rem;
  margin: var(--space-2xl) 0 var(--space-3xl);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
  background: var(--color-paper-raised);
}

.runway-diagram__bank {
  display: grid;
  align-content: space-evenly;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-sm);
}

.runway-diagram__seat {
  height: var(--space-xs);
  background: var(--color-rule);
}

.runway-diagram__bank:first-child .runway-diagram__seat:nth-child(even),
.runway-diagram__bank:last-child .runway-diagram__seat:nth-child(odd) {
  transform: translateX(var(--space-xs));
  background: var(--color-accent-soft);
}

.runway-diagram__track {
  position: relative;
  border-inline: var(--rule-heavy) solid var(--color-ink);
  background: var(--color-paper-sunken);
}

.runway-diagram__track::before,
.runway-diagram__track::after {
  position: absolute;
  inset-inline-start: 50%;
  width: var(--space-md);
  aspect-ratio: 1;
  border-radius: var(--radius-round);
  background: var(--color-accent);
  content: "";
  transform: translateX(-50%);
}

.runway-diagram__track::before {
  inset-block-start: var(--space-xl);
}

.runway-diagram__track::after {
  inset-block-end: var(--space-xl);
}

.runway-diagram figcaption {
  grid-column: 1 / -1;
  padding: var(--space-sm) 0 0;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.prose section {
  display: grid;
  gap: var(--space-md);
  padding-block: var(--space-2xl);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.prose section:nth-of-type(2) {
  padding-block: var(--space-3xl) var(--space-xl);
}

.prose section:last-of-type {
  border-bottom: 0;
}

.prose h2 {
  max-width: 18ch;
  margin: 0 0 var(--space-sm);
  font-size: var(--text-2xl);
  font-weight: 780;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.prose h3 {
  margin: var(--space-lg) 0 0;
  font-size: var(--text-lg);
  font-weight: 750;
  line-height: 1.2;
}

.prose p,
.prose li {
  max-width: 68ch;
}

.prose p {
  margin: 0;
}

.prose dfn {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 750;
}

.prose blockquote {
  max-width: 58ch;
  margin: var(--space-lg) 0;
  padding: var(--space-lg) 0 var(--space-lg) var(--space-lg);
  border-inline-start: var(--rule-heavy) solid var(--color-accent);
  color: var(--color-ink-soft);
  font-size: var(--text-md);
}

.prose blockquote p {
  margin: 0;
}

.lens-grid {
  display: grid;
  gap: var(--space-lg);
  margin-block: var(--space-lg);
  border-block: var(--rule-heavy) solid var(--color-ink);
  padding-block: var(--space-lg);
}

.lens-grid article {
  min-width: 0;
}

.lens-grid h3 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: 800;
}

.lens-grid p {
  color: var(--color-ink-soft);
}

.sequence {
  display: grid;
  gap: var(--space-md);
  list-style: none;
  margin: var(--space-lg) 0;
  padding: 0;
  counter-reset: stage;
}

.sequence li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: var(--space-md);
  align-items: start;
  padding-block: var(--space-md);
  border-top: var(--rule-hair) solid var(--color-rule-strong);
  counter-increment: stage;
}

.sequence li::before {
  color: var(--color-accent);
  content: counter(stage, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.sequence strong {
  display: block;
  margin-bottom: var(--space-xs);
  font-family: var(--font-ui);
}

.evidence-table {
  display: grid;
  gap: 0;
  margin-block: var(--space-lg);
  border-block: var(--rule-heavy) solid var(--color-ink);
}

.evidence-row {
  display: grid;
  gap: var(--space-xs);
  padding-block: var(--space-md);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.evidence-row:last-child {
  border-bottom: 0;
}

.evidence-row strong {
  font-family: var(--font-ui);
}

.source-list {
  display: grid;
  gap: var(--space-xl);
  list-style: none;
  margin: var(--space-lg) 0;
  padding: 0;
}

.source-list li {
  padding-top: var(--space-md);
  border-top: var(--rule-hair) solid var(--color-rule-strong);
}

.source-list h3 {
  margin: 0 0 var(--space-xs);
}

.source-meta {
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}

.chapter-nav {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-3xl);
  padding-top: var(--space-lg);
  border-top: var(--rule-heavy) solid var(--color-ink);
}

.chapter-nav a {
  display: grid;
  align-content: center;
  min-height: 5.5rem;
  padding: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule-strong);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-in);
}

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

.chapter-nav a:active {
  transform: translateY(1px);
}

.chapter-nav small {
  display: none;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
}

.site-footer {
  width: min(100% - var(--space-lg), 78rem);
  margin-inline: auto;
  padding-block: var(--space-lg) var(--space-2xl);
  border-top: var(--rule-hair) solid var(--color-rule-strong);
}

.site-footer p {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-lg);
  justify-content: space-between;
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}

.site-footer a {
  white-space: nowrap;
}

@media (min-width: 40rem) {
  .page-frame,
  .site-masthead,
  .site-footer {
    width: min(100% - var(--space-2xl), 78rem);
  }

  .lens-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .evidence-row {
    grid-template-columns: minmax(9rem, 0.45fr) minmax(0, 1fr);
    gap: var(--space-lg);
  }

  .chapter-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 60rem) {
  .nav-toggle {
    display: none;
  }

  .mast-nav ul,
  .mast-nav.is-open ul {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
  }

  .mast-actions {
    position: absolute;
    inset-block-start: var(--space-sm);
    inset-inline-end: 0;
    margin: 0;
  }

  .reading-layout {
    grid-template-columns: minmax(10rem, 0.3fr) minmax(0, 1fr);
    gap: var(--space-3xl);
    align-items: start;
  }

  .route-rail {
    position: sticky;
    inset-block-start: var(--space-xl);
    border-block: 0;
    border-inline-end: var(--rule-hair) solid var(--color-rule);
    padding: var(--space-lg) var(--space-lg) var(--space-lg) 0;
  }

  .chapter-head {
    padding-block-start: var(--space-2xl);
  }

  .runway-diagram {
    margin-inline: calc(var(--space-xl) * -1);
  }
}

@media (hover: hover) and (pointer: fine) {
  .mast-nav a:hover,
  .route-rail a:hover {
    color: var(--color-accent);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
}