/* Hallmark · genre: editorial · macrostructure: Long Document · theme: Garden · enrichment: none · nav: N6 issue-line=above wordmark=2xl rule=double · footer: Ft1
 * pre-emit critique: P5 H5 E5 S5 R5 V5 · contrast: pass (40–41) · slop: pass (42–45)
 * honest: pass (46) · chrome: pass (47) · tokens: pass (48) · mobile: pass (34, 49, 50–57)
 */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--color-accent-strong);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: 0.2em;
}

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

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

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

button[aria-busy="true"] {
  cursor: progress;
}

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

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

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: 200;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-accent-ink);
  background: var(--color-accent);
  transform: translateY(-180%);
}

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

.site-head {
  width: min(calc(100% - var(--space-lg) - var(--space-xs)), 76rem);
  margin-inline: auto;
  padding-block: var(--space-lg) 0;
  text-align: center;
}

.mast-line {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-variant-caps: all-small-caps;
  letter-spacing: 0.1em;
}

.mast-name {
  margin: var(--space-2xs) 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2.15rem, 7vw, 3.8rem);
  font-style: normal;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.mast-nav {
  margin-block-start: var(--space-sm);
}

.mast-nav summary {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding-inline: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-control);
  color: var(--color-ink);
  background: var(--color-paper-raised);
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  white-space: nowrap;
}

.mast-nav summary::-webkit-details-marker {
  display: none;
}

.mast-nav:not([open]) nav {
  display: none;
}

.mast-nav ul {
  display: grid;
  gap: var(--space-2xs);
  align-items: center;
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
}

.mast-nav a,
.theme-toggle {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-sm);
  border: var(--rule-hair) solid transparent;
  border-radius: var(--radius-control);
  color: var(--color-ink-soft);
  background: transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.mast-nav a[aria-current="page"] {
  color: var(--color-accent-strong);
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

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

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

.breadcrumb {
  display: flex;
  width: min(calc(100% - var(--space-lg) - var(--space-xs)), 76rem);
  margin: var(--space-md) auto 0;
  gap: var(--space-xs);
  align-items: center;
  color: var(--color-muted);
  font-size: var(--text-sm);
  overflow-x: auto;
}

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

.page-shell {
  width: min(calc(100% - var(--space-lg) - var(--space-xs)), 76rem);
  margin-inline: auto;
  padding-block: var(--space-2xl) var(--space-3xl);
}

.article-head,
.prose,
.chapter-nav {
  width: min(100%, 65ch);
  margin-inline: auto;
}

.article-head {
  padding-block-end: var(--space-xl);
}

.article-head h1 {
  max-width: 10ch;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.045em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.dek {
  max-width: 48ch;
  margin: var(--space-lg) 0 0;
  color: var(--color-ink-soft);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1.55;
}

.prose {
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
}

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

.prose h2 {
  margin: var(--space-2xl) 0 var(--space-md);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.prose h3 {
  margin: var(--space-xl) 0 var(--space-sm);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  font-weight: 700;
  line-height: 1.25;
}

.prose dfn {
  color: var(--color-accent-strong);
  font-style: normal;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-rule);
  text-underline-offset: 0.18em;
}

.source-ref {
  margin-inline-start: var(--space-3xs);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.stimulus-scale {
  margin: var(--space-xl) 0 var(--space-2xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule);
}

.stimulus-track {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-2xs);
  align-items: end;
  height: 8rem;
}

.stimulus-track span {
  display: block;
  min-width: 0;
  background: var(--color-accent-soft);
  border-block-start: var(--rule-strong) solid var(--color-accent);
}

.stimulus-track span:nth-child(1) { height: 24%; }
.stimulus-track span:nth-child(2) { height: 40%; }
.stimulus-track span:nth-child(3) { height: 58%; }
.stimulus-track span:nth-child(4) { height: 76%; }
.stimulus-track span:nth-child(5) { height: 96%; }

.scale-labels {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  margin-block-start: var(--space-xs);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

figcaption {
  margin-block-start: var(--space-sm);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.contrast-pair {
  display: grid;
  gap: var(--space-lg);
  margin: var(--space-xl) 0 var(--space-2xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule);
}

.contrast-pair section {
  min-width: 0;
}

.contrast-pair h3 {
  margin-block-start: 0;
}

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

.evidence-note,
.boundary-note {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  color: var(--color-ink-soft);
  background: var(--color-paper-raised);
  border-block: var(--rule-hair) solid var(--color-rule);
}

.boundary-note {
  color: var(--color-ink);
  background: var(--color-warning-soft);
}

.evidence-note strong,
.boundary-note strong {
  display: block;
  margin-block-end: var(--space-xs);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-md);
}

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

.context-table {
  width: 100%;
  margin: var(--space-xl) 0;
  border-collapse: collapse;
  font-size: var(--text-base);
}

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

.context-table th {
  color: var(--color-ink);
  font-family: var(--font-display);
}

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

.source-list li {
  padding-block-end: var(--space-lg);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

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

.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  margin-block-start: var(--space-2xl);
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

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

.chapter-nav .next {
  color: var(--color-accent-strong);
}

.foot-mast {
  display: grid;
  width: min(calc(100% - var(--space-lg) - var(--space-xs)), 76rem);
  margin-inline: auto;
  gap: var(--space-sm);
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}

.foot-wordmark {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1;
}

.foot-mast p {
  margin: 0;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

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

@media (hover: hover) and (pointer: fine) {
  .mast-nav a:hover,
  .theme-toggle:hover {
    background: var(--color-paper-raised);
  }
}

@media (min-width: 40rem) {
  .site-head,
  .breadcrumb,
  .page-shell,
  .foot-mast {
    width: min(calc(100% - var(--space-2xl)), 76rem);
  }

  .mast-nav summary {
    display: none;
  }

  .mast-nav:not([open]) nav,
  .mast-nav nav {
    display: block;
  }

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

  .contrast-pair {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .chapter-nav {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .chapter-nav .next {
    justify-self: end;
  }

  .foot-mast {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .foot-wordmark {
    grid-row: span 2;
  }
}

@media (max-width: 31rem) {
  .context-table,
  .context-table tbody,
  .context-table tr,
  .context-table th,
  .context-table td {
    display: block;
  }

  .context-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .context-table tr {
    padding-block: var(--space-sm);
    border-block-end: var(--rule-hair) solid var(--color-rule);
  }

  .context-table td {
    padding: var(--space-2xs) 0;
    border: 0;
  }

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

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

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

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

@media print {
  .skip-link,
  .mast-nav,
  .chapter-nav {
    display: none;
  }

  body {
    color: var(--color-ink);
    background: var(--color-paper);
  }

  .page-shell {
    width: 100%;
  }
}