/* Hallmark · macrostructure: Long Document · tone: calm clinical editorial · anchor hue: cinnabar
 * genre: editorial · theme: Almanac · enrichment: E5 tier-A CSS focus field · nav: N6 · footer: Ft2
 * audience: general · use: read and judge · contrast: WCAG AA pass · slop: 57/57 pass
 */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 */
@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-width: 0;
  background: var(--color-paper);
  color: var(--color-ink-2);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-link);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: var(--space-3xs);
}

a:hover {
  text-decoration-thickness: calc(var(--rule-hair) * 2);
}

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

a[aria-disabled="true"] {
  color: var(--color-muted);
  cursor: not-allowed;
  pointer-events: none;
}

a:focus-visible,
button:focus-visible,
summary: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: 500;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-180%);
}

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

.site-head,
.breadcrumb,
.page-shell,
.foot-line {
  width: min(100% - calc(var(--space-md) * 2), 74rem);
  margin-inline: auto;
}

.site-head {
  display: grid;
  gap: var(--space-xs);
  padding-block: var(--space-lg) var(--space-sm);
  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: 0.12em;
}

.mast-name {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.25rem);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  overflow-wrap: anywhere;
  min-width: 0;
}

.nav-menu-btn {
  margin: 0;
  list-style: none;
  cursor: pointer;
  color: var(--color-link);
  font-weight: 700;
  min-height: 2.75rem;
  align-content: center;
  white-space: nowrap;
}

.nav-menu-btn::-webkit-details-marker {
  display: none;
}

.mast-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs) var(--space-lg);
  padding: 0;
  margin: var(--space-xs) 0 0;
  list-style: none;
}

.mast-nav a,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  color: var(--color-ink-2);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.mast-nav a[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: calc(var(--rule-hair) * 2);
  text-underline-offset: var(--space-3xs);
}

.theme-toggle {
  padding-inline: var(--space-sm);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-small);
  background: var(--color-paper-raised);
  cursor: pointer;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

.theme-toggle:hover {
  background: var(--color-paper-soft);
}

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

.theme-toggle:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

summary:hover {
  color: var(--color-accent);
}

summary:active {
  transform: translateY(1px);
}

summary[aria-disabled="true"] {
  color: var(--color-muted);
  cursor: not-allowed;
}

.double-rule {
  width: 100%;
  height: var(--rule-double);
  margin: var(--space-sm) 0 0;
  border: 0;
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.breadcrumb {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  padding-block: var(--space-sm);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  color: var(--color-muted);
  font-size: var(--text-sm);
  overflow-x: auto;
}

.breadcrumb a,
.breadcrumb span {
  line-height: 1;
  white-space: nowrap;
}

.page-shell {
  padding-block: var(--space-2xl) var(--space-3xl);
}

.article-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: center;
  padding-block-end: var(--space-2xl);
}

.kicker {
  margin: 0 0 var(--space-sm);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
}

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

h1 {
  max-width: 10ch;
  font-size: var(--text-display);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

h2 {
  margin-block: var(--space-2xl) var(--space-lg);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.18;
}

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

.dek {
  max-width: 58ch;
  margin: var(--space-lg) 0 0;
  color: var(--color-ink-2);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1.65;
}

.focus-field {
  position: relative;
  width: min(100%, 27rem);
  aspect-ratio: 4 / 3;
  margin: 0;
  justify-self: end;
  border-block: var(--rule-hair) solid var(--color-rule-strong);
  background:
    repeating-linear-gradient(90deg, transparent 0 var(--space-lg), var(--color-rule) var(--space-lg) calc(var(--space-lg) + var(--rule-hair))),
    var(--color-paper-soft);
  overflow: clip;
}

.focus-field::before {
  content: "";
  position: absolute;
  inset: 12% 16%;
  border: var(--rule-hair) solid var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 var(--space-lg) var(--color-paper-raised), 0 0 0 calc(var(--space-lg) + var(--rule-hair)) var(--color-rule-strong);
}

.focus-field::after {
  content: "";
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  width: var(--space-xs);
  height: var(--space-xs);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  transform: translate(-50%, -50%);
}

.focus-label {
  position: absolute;
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.focus-label.primary {
  inset-block-start: 48%;
  inset-inline-start: var(--space-sm);
  color: var(--color-accent);
}

.focus-label.peripheral {
  inset-block-end: var(--space-sm);
  inset-inline-end: var(--space-sm);
}

.focus-field figcaption {
  position: absolute;
  inset-block-start: var(--space-sm);
  inset-inline-end: var(--space-sm);
  max-width: 18ch;
  color: var(--color-ink-2);
  font-size: var(--text-xs);
  line-height: 1.55;
  text-align: end;
}

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

.prose > p,
.prose li {
  font-size: 1.0625rem;
}

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

.prose > p:first-of-type::first-letter {
  float: inline-start;
  margin-inline-end: var(--space-xs);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 4.8rem;
  font-weight: 900;
  line-height: 0.78;
}

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

.margin-note,
.safety-note {
  margin-block: var(--space-xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.margin-note strong,
.safety-note strong {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-md);
}

.safety-note {
  color: var(--color-ink-2);
  background: var(--color-accent-soft);
  padding-inline: var(--space-lg);
}

.mechanism-strip {
  display: grid;
  gap: var(--space-sm);
  margin-block: var(--space-xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.mechanism-step {
  display: grid;
  grid-template-columns: minmax(5rem, auto) minmax(0, 1fr);
  gap: var(--space-md);
  align-items: baseline;
}

.mechanism-step strong {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-md);
}

.mechanism-step span {
  color: var(--color-ink-2);
}

.evidence-ledger {
  width: 100%;
  margin-block: var(--space-xl);
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.evidence-ledger th,
.evidence-ledger td {
  padding: var(--space-sm) var(--space-xs);
  border-bottom: var(--rule-hair) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

.evidence-ledger th {
  color: var(--color-ink);
  font-family: var(--font-display);
}

.source-ref {
  display: inline-flex;
  min-width: 2rem;
  min-height: 2rem;
  align-items: center;
  justify-content: center;
  line-height: 1;
  margin-inline-start: var(--space-2xs);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 700;
  white-space: nowrap;
}

.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  max-width: 74rem;
  margin: 0 auto;
  padding-block: var(--space-xl);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.chapter-nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  line-height: 1;
  width: fit-content;
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  white-space: nowrap;
}

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

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

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

.source-list li::before {
  content: "[" counter(source) "]";
  display: block;
  margin-block-end: var(--space-xs);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
}

.source-list h2 {
  margin: 0 0 var(--space-sm);
  font-size: var(--text-lg);
}

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

.foot-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm) var(--space-lg);
  padding-block: var(--space-lg) var(--space-xl);
  border-top: var(--rule-hair) solid var(--color-rule-strong);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.foot-line p {
  margin: 0;
}

.foot-line a {
  line-height: 1;
  white-space: nowrap;
}

@media (min-width: 48rem) {
  .site-head,
  .breadcrumb,
  .page-shell,
  .foot-line {
    width: min(100% - calc(var(--space-xl) * 2), 74rem);
  }

  .nav-menu-btn {
    display: none;
  }

  .mast-nav {
    display: block;
  }

  .article-head {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.7fr);
    gap: var(--space-3xl);
  }

  .mechanism-step {
    grid-template-columns: 8rem minmax(0, 1fr);
  }

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

@media (max-width: 47.999rem) {
  .mast-nav:not([open]) > :not(summary) {
    display: none;
  }

  .mast-nav ul {
    display: grid;
    gap: 0;
  }

  .mast-nav a,
  .theme-toggle {
    width: 100%;
    border-bottom: var(--rule-hair) solid var(--color-rule);
  }

  .article-head {
    padding-block-start: var(--space-sm);
  }

  .focus-field {
    justify-self: start;
  }

  .evidence-ledger,
  .evidence-ledger tbody,
  .evidence-ledger tr,
  .evidence-ledger th,
  .evidence-ledger td {
    display: block;
  }

  .evidence-ledger thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: clip;
  }

  .evidence-ledger tr {
    padding-block: var(--space-sm);
    border-bottom: var(--rule-hair) solid var(--color-rule-strong);
  }

  .evidence-ledger th,
  .evidence-ledger td {
    border: 0;
  }

  .evidence-ledger td::before {
    content: attr(data-label);
    display: block;
    color: var(--color-muted);
    font-size: var(--text-xs);
    font-weight: 700;
  }
}

@media (max-width: 24rem) {
  .site-head,
  .breadcrumb,
  .page-shell,
  .foot-line {
    width: min(100% - calc(var(--space-sm) * 2), 74rem);
  }

  h1 {
    font-size: clamp(2.4rem, 15vw, 3.5rem);
  }

  .mechanism-step {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2xs);
  }

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-head,
  .breadcrumb,
  .chapter-nav,
  .foot-line,
  .theme-toggle {
    display: none;
  }

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

  .page-shell,
  .prose {
    width: 100%;
    max-width: none;
  }
}