/* Hallmark · macrostructure: Long Document · tone: restrained philosophical editorial · anchor hue: pine green · genre: editorial · theme: Studio · enrichment: none · nav: N3 · footer: Ft2 · audience: general · use: continuous public learning */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V4 */
/* Hallmark · 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) */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

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

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--color-accent);
  text-decoration-color: var(--color-rule-strong);
  text-decoration-thickness: var(--rule-thin);
  text-underline-offset: var(--space-2xs);
}

a:hover {
  text-decoration-thickness: var(--rule-strong);
}

a:active {
  color: var(--color-ink);
}

a[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

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

button {
  min-height: 2.75rem;
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-control);
  background: var(--color-panel);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

button:hover {
  background: var(--color-accent-soft);
}

button:active {
  transform: translateY(var(--rule-thin));
}

button:disabled,
button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

button[data-state="loading"] {
  cursor: wait;
}

button[data-state="error"] {
  border-color: var(--color-danger);
}

button[data-state="success"] {
  border-color: var(--color-accent);
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-xs);
  inset-inline-start: var(--space-xs);
  z-index: 20;
  padding: var(--space-sm) var(--space-md);
  transform: translateY(-160%);
  background: var(--color-ink);
  color: var(--color-paper);
  white-space: nowrap;
}

.skip-link:focus {
  transform: none;
}

.mobile-bar {
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  min-height: 3.75rem;
  padding: var(--space-xs) var(--space-md);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}

.mobile-title {
  min-width: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-style: normal;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.mobile-actions {
  display: flex;
  gap: var(--space-xs);
}

.mobile-actions button {
  padding-inline: var(--space-sm);
}

.nav-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 9;
  display: none;
  width: var(--space-rail);
  border-inline-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper-2);
}

.rail-home {
  position: absolute;
  inset-block-start: var(--space-lg);
  inset-inline-start: 50%;
  color: var(--color-ink);
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  transform: translateX(-50%);
  writing-mode: vertical-rl;
  white-space: nowrap;
}

.rail-track {
  position: absolute;
  inset-block-end: var(--space-lg);
  inset-inline-start: 50%;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transform: translateX(-50%);
}

.rail-track a {
  display: block;
  width: 0.75rem;
  height: 0.75rem;
  border: var(--rule-thin) solid var(--color-rule-strong);
  border-radius: 50%;
  background: var(--color-paper);
  color: var(--color-transparent);
  font-size: 0;
}

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

.page-nav {
  display: none;
  padding: var(--space-md);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper-2);
}

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

.page-nav a {
  min-height: 2.75rem;
  display: flex;
  align-items: center;
  color: var(--color-ink-2);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

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

.shell {
  width: min(100% - 2rem, 74rem);
  margin-inline: auto;
  padding-block: var(--space-xl) var(--space-3xl);
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-block-end: var(--space-xl);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.crumbs a,
.crumbs span {
  white-space: nowrap;
}

.chapter-head {
  display: block;
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.chapter-head h1,
.chapter-head h2,
.prose h2,
.prose h3,
.source-entry h2 {
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  overflow-wrap: anywhere;
}

.chapter-head h1 {
  max-width: 12ch;
  font-size: var(--text-display-s);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.chapter-head .lede {
  max-width: 47ch;
  margin: var(--space-xl) 0 0;
  color: var(--color-ink-2);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.5;
}

.chapter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-lg);
  margin: var(--space-xl) 0 0;
  color: var(--color-muted);
  font-family: var(--font-outlier);
  font-size: var(--text-xs);
}

.reading-path {
  display: grid;
  gap: var(--space-xs);
  margin-block: var(--space-xl) var(--space-2xl);
  padding: 0;
  list-style: none;
  counter-reset: path;
}

.reading-path li {
  counter-increment: path;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-sm);
  align-items: baseline;
  padding-block: var(--space-xs);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.reading-path li::before {
  content: counter(path, decimal-leading-zero);
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-xs);
}

.reading-path a,
.reading-path span {
  color: var(--color-ink-2);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.reading-path [aria-current="page"] {
  color: var(--color-accent);
}

.prose {
  max-width: 66ch;
  margin-inline: auto;
}

.prose section {
  margin-block: var(--space-3xl);
  scroll-margin-block-start: var(--space-xl);
}

.prose section:first-of-type {
  margin-block-start: var(--space-2xl);
}

.prose section:nth-of-type(even) {
  margin-block-start: var(--space-2xl);
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.prose h2 {
  margin-block-end: var(--space-lg);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.prose h3 {
  margin-block: var(--space-xl) var(--space-sm);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
}

.prose p,
.prose li {
  color: var(--color-ink-2);
  font-size: var(--text-base);
}

.prose p {
  margin-block: 0 var(--space-lg);
}

.prose ul,
.prose ol {
  margin-block: var(--space-lg);
  padding-inline-start: var(--space-lg);
}

.prose li + li {
  margin-block-start: var(--space-sm);
}

.prose strong,
.prose dfn {
  color: var(--color-ink);
}

.prose dfn {
  font-style: normal;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--rule-strong);
  text-underline-offset: var(--space-3xs);
}

.note {
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border-block: var(--rule-thin) solid var(--color-rule-strong);
  background: var(--color-accent-soft);
  color: var(--color-ink-2);
}

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

.choice-field {
  margin-block: var(--space-xl) var(--space-2xl);
  padding: var(--space-lg) 0;
  border-block: var(--rule-thin) solid var(--color-rule);
}

.choice-field h2 {
  margin-block-end: var(--space-lg);
}

.choice-line {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: var(--space-md);
  align-items: center;
  margin-block: var(--space-sm);
}

.choice-line span {
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-xs);
}

.choice-line i {
  display: block;
  height: var(--rule-strong);
  background: var(--color-rule-strong);
}

.choice-line:nth-of-type(2) i { width: 82%; }
.choice-line:nth-of-type(3) i { width: 62%; }
.choice-line:nth-of-type(4) i { width: 42%; }
.choice-line:nth-of-type(5) i { width: 24%; }

.pattern-list {
  margin-block: var(--space-xl);
  padding: 0;
  list-style: none;
  counter-reset: pattern;
}

.pattern-list li {
  counter-increment: pattern;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-md);
  padding-block: var(--space-lg);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.pattern-list li::before {
  content: counter(pattern, decimal-leading-zero);
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
}

.pattern-list p {
  margin: 0;
}

.comparison {
  margin-block: var(--space-xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}

.comparison-row {
  display: grid;
  gap: var(--space-xs);
  padding-block: var(--space-lg);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.comparison-row strong {
  color: var(--color-ink);
}

.comparison-row p {
  margin: 0;
}

.cite {
  margin-inline-start: var(--space-2xs);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.page-turn {
  display: grid;
  gap: var(--space-sm);
  max-width: 66ch;
  margin: var(--space-3xl) auto 0;
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}

.page-turn p {
  margin: 0;
  color: var(--color-muted);
}

.page-turn a {
  width: fit-content;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  text-decoration-color: var(--color-accent);
  white-space: nowrap;
}

.source-list {
  display: grid;
  gap: var(--space-xl);
  margin-block: var(--space-2xl);
}

.source-entry {
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.source-entry h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
}

.source-entry p {
  margin-block: var(--space-sm) 0;
}

.source-entry a {
  overflow-wrap: anywhere;
}

.site-foot {
  width: min(100% - 2rem, 74rem);
  margin-inline: auto;
  padding-block: var(--space-lg) var(--space-xl);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.site-foot p {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

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

@media (min-width: 40rem) {
  .shell {
    width: min(100% - 3rem, 74rem);
    padding-block-start: var(--space-2xl);
  }

  .chapter-head .lede {
    margin-inline-start: var(--space-2xl);
  }

  .reading-path {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-md);
  }

  .reading-path li {
    grid-template-columns: 1fr;
    align-content: start;
  }

  .comparison-row {
    grid-template-columns: minmax(10rem, 0.4fr) minmax(0, 1fr);
    gap: var(--space-lg);
  }
}

@media (min-width: 60rem) {
  body {
    padding-inline-start: var(--space-rail);
  }

  .mobile-bar {
    display: none;
  }

  .nav-rail {
    display: block;
  }

  .page-nav {
    position: fixed;
    inset-block-start: var(--space-xl);
    inset-inline-end: var(--space-xl);
    z-index: 8;
    display: grid;
    gap: var(--space-2xs);
    width: 12rem;
    padding: var(--space-sm);
    border: var(--rule-thin) solid var(--color-rule);
    border-radius: var(--radius-panel);
    background: var(--color-panel);
  }

  .page-nav a {
    min-height: 2.4rem;
    font-size: var(--text-sm);
  }

  .shell,
  .site-foot {
    padding-inline-end: var(--space-nav-reserve);
  }
}

@media (pointer: coarse) {
  a,
  button {
    min-height: 2.75rem;
  }
}

@media print {
  .mobile-bar,
  .nav-rail,
  .page-nav,
  .skip-link,
  .theme-toggle {
    display: none;
  }

  body {
    padding: 0;
  }

  .shell,
  .site-foot {
    width: 100%;
    padding-inline: 0;
  }

  a {
    color: var(--color-ink);
  }
}

@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;
  }
}