/* Hallmark · genre: editorial · macrostructure: Split Studio · tone: restrained psychology · anchor hue: brick · theme: Newsprint · enrichment: none · nav: N6 issue-line=above wordmark=2xl rule=double · footer: Ft1 wordmark=2xl tagline=roman links=inline
 * Hallmark · 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) · responsive: pass (34, 49, 50–57) · icons: pass (30)
 */
@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:active {
  color: var(--color-accent);
}

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: var(--z-sticky);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-paper);
  background: var(--color-ink);
  transform: translateY(-180%);
}

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

.site-head {
  width: min(calc(100% - var(--space-xl)), 78rem);
  margin-inline: auto;
  padding-block: var(--space-lg) 0;
  text-align: center;
}

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

.mast-name {
  margin: var(--space-2xs) 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7vw, 3.75rem);
  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 summary:hover,
.theme-toggle:hover {
  background: var(--color-paper-raised);
}

.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 var(--color-paper);
  border-radius: var(--radius-control);
  color: var(--color-ink-soft);
  background: var(--color-paper);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.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-xl)), 78rem);
  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,
.foot-links a,
.chapter-nav a {
  white-space: nowrap;
}

.page-shell {
  width: min(calc(100% - var(--space-xl)), 78rem);
  margin-inline: auto;
  padding-block: var(--space-2xl) var(--space-3xl);
}

.article-head {
  display: grid;
  gap: var(--space-lg);
  padding-block-end: var(--space-2xl);
}

.article-head h1 {
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.04em;
  overflow-wrap: anywhere;
}

.dek {
  align-self: end;
  max-width: 45ch;
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-md);
  line-height: 1.55;
}

.prose {
  max-width: 70ch;
}

.prose > p,
.prose > h2,
.prose > h3,
.prose > aside,
.prose > ol,
.prose > ul {
  margin-inline: 0;
}

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

.prose h2 {
  margin-block: var(--space-3xl) var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: normal;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.prose h3 {
  margin-block: var(--space-xl) var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  font-weight: 700;
  line-height: 1.2;
}

.prose h2,
.prose h3 {
  min-width: 0;
  overflow-wrap: anywhere;
}

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

.source-ref {
  margin-inline-start: var(--space-2xs);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.split-proof {
  display: grid;
  gap: var(--space-xl);
  margin-block: var(--space-2xl);
  padding-block: var(--space-xl);
  border-block: var(--rule-hair) solid var(--color-rule);
}

.split-proof > section {
  min-width: 0;
}

.split-proof h3 {
  margin-block-start: 0;
}

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

.split-proof .iq-side h3,
.iq-mark {
  color: var(--color-counter);
}

.split-proof .eq-side h3,
.eq-mark {
  color: var(--color-accent-strong);
}

.process-map {
  margin-block: var(--space-2xl);
  padding: var(--space-lg);
  background: var(--color-paper-raised);
  border-block: var(--rule-hair) solid var(--color-rule);
}

.process-map ol {
  display: grid;
  gap: var(--space-sm);
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-map li {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) minmax(0, 1fr);
  gap: var(--space-md);
  align-items: baseline;
  padding-block: var(--space-sm);
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.process-map li:last-child {
  border-block-end: 0;
}

.process-map strong {
  font-variant-numeric: tabular-nums;
}

.process-map figcaption {
  margin-block-start: var(--space-md);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.evidence-note {
  margin-block: var(--space-2xl);
  padding: var(--space-lg) 0;
  border-block: var(--rule-strong) solid var(--color-ink);
}

.evidence-note strong {
  display: block;
  margin-block-end: var(--space-xs);
  font-family: var(--font-display);
  font-size: var(--text-lg);
}

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

.table-wrap {
  margin-block: var(--space-2xl);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.compare-table caption {
  padding-block-end: var(--space-sm);
  color: var(--color-muted);
  text-align: start;
}

.compare-table th,
.compare-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;
}

.compare-table th {
  font-family: var(--font-display);
  font-size: var(--text-base);
}

.source-list {
  margin: var(--space-2xl) 0;
  padding-inline-start: var(--space-lg);
}

.source-list li {
  padding-block: 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: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: 70ch;
  margin-block-start: var(--space-3xl);
  padding-block-start: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.chapter-nav a,
.foot-links a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.chapter-nav .next {
  margin-inline-start: auto;
}

.foot-mast {
  display: grid;
  gap: var(--space-sm);
  width: min(calc(100% - var(--space-xl)), 78rem);
  margin-inline: auto;
  padding-block: var(--space-xl) var(--space-2xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}

.foot-mast p {
  margin: 0;
}

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

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

@media (min-width: 40rem) {
  .mast-nav:not([open]) nav {
    display: block;
  }

  .mast-nav summary {
    display: none;
  }

  .mast-nav ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
  }

  .article-head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .split-proof {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .split-proof.reverse {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .split-proof.reverse > :first-child {
    order: 2;
  }

  .process-map ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .foot-mast {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .foot-links {
    justify-content: end;
  }
}

@media (min-width: 60rem) {
  .prose {
    margin-inline-start: var(--space-2xl);
  }

  .article-head {
    gap: var(--space-3xl);
  }

  .split-proof {
    width: min(112%, 78rem);
    gap: var(--space-3xl);
  }
}

@media (max-width: 39.99rem) {
  .compare-table,
  .compare-table tbody,
  .compare-table tr,
  .compare-table th,
  .compare-table td {
    display: block;
  }

  .compare-table thead {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    overflow: clip;
    clip-path: inset(50%);
  }

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

  .compare-table td {
    display: grid;
    grid-template-columns: minmax(5rem, 0.7fr) minmax(0, 1.3fr);
    gap: var(--space-sm);
    border: 0;
  }

  .compare-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;
  }
}