/* Hallmark · macrostructure: Long Document · genre: editorial · theme: Garden · tone: practical rural economy · anchor hue: crop green · enrichment: Tier-A CSS ledger · nav: N6 · footer: Ft6 · audience: general · use: continuous public learning · 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) */
/* Hallmark · pre-emit critique: P5 H4 E4 S5 R5 V4 */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

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

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

*,
*::before,
*::after {
  box-sizing: border-box;
}

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-ink);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: var(--space-3xs);
}

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

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

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

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

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: 10;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-180%);
}

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

.masthead {
  padding: var(--space-md) var(--page-gutter) 0;
  text-align: center;
}

.masthead__issue {
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.masthead__name {
  min-width: 0;
  margin: var(--space-2xs) 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 3.9rem);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.masthead__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2xs) var(--space-lg);
  margin-block: var(--space-sm);
}

.masthead__nav a,
.theme-toggle {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1;
}

.theme-toggle {
  border: 0;
  border-bottom: var(--rule-hair) solid var(--color-rule-strong);
  padding: 0;
  background: transparent;
  color: var(--color-accent-ink);
  cursor: pointer;
  font-family: var(--font-body);
  transition: color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.theme-toggle:hover {
  color: var(--color-rust);
}

.theme-toggle:active {
  transform: translateY(var(--space-3xs));
}

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

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

.breadcrumb {
  width: min(100%, 76rem);
  margin-inline: auto;
  padding: var(--space-md) var(--page-gutter) 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.breadcrumb a,
.chapter-nav a,
.site-footer a {
  white-space: nowrap;
}

.page {
  width: min(100%, 76rem);
  margin-inline: auto;
  padding: var(--space-xl) var(--page-gutter) var(--space-3xl);
}

.hero {
  display: grid;
  gap: var(--space-xl);
  align-items: end;
  margin-block-end: var(--space-3xl);
  padding-block: var(--space-sm) var(--space-xl);
}

.hero__copy {
  min-width: 0;
}

.hero h1,
.chapter-header h1 {
  min-width: 0;
  max-width: 13ch;
  margin: 0 0 var(--space-lg);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.hero__lede,
.chapter-header__lede {
  max-width: 44ch;
  margin: 0;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-style: normal;
  line-height: 1.55;
}

.ledger {
  border-block: var(--rule-hair) solid var(--color-rule-strong);
  padding-block: var(--space-lg);
  background: var(--color-paper-raised);
}

.ledger__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-style: normal;
}

.ledger__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-md);
  padding-block: var(--space-sm);
  border-block-end: var(--rule-hair) dotted var(--color-rule);
}

.ledger__row:last-child {
  border-block-end: 0;
  color: var(--color-accent-ink);
  font-weight: 700;
}

.ledger__mark {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.chapter-header {
  margin-block-end: var(--space-3xl);
  padding-block-end: var(--space-xl);
  border-block-end: var(--rule-hair) solid var(--color-rule-strong);
}

.prose {
  max-width: var(--measure);
  margin-inline: auto;
}

.prose section {
  margin-block: 0 var(--space-3xl);
}

.prose section:nth-of-type(2n) {
  margin-block-end: var(--space-4xl);
}

.prose section:nth-of-type(3n) {
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.prose h2 {
  min-width: 0;
  margin: 0 0 var(--space-lg);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.prose h3 {
  min-width: 0;
  margin: var(--space-xl) 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-style: normal;
  line-height: 1.35;
}

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

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

.dropcap::first-letter {
  float: inline-start;
  margin-inline-end: var(--space-xs);
  color: var(--color-rust);
  font-family: var(--font-display);
  font-size: 4.2rem;
  font-weight: 700;
  line-height: 0.82;
}

.field-note,
.boundary-note {
  margin-block: var(--space-xl);
  padding: var(--space-lg) 0 var(--space-lg) var(--space-lg);
  border-inline-start: var(--rule-hair) solid var(--color-rule-strong);
  color: var(--color-muted);
}

.field-note strong,
.boundary-note strong {
  color: var(--color-ink);
}

.flow {
  display: grid;
  gap: var(--space-sm);
  margin-block: var(--space-xl);
}

.flow__item {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: var(--space-md);
  align-items: baseline;
  padding-block: var(--space-md);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.flow__item:last-child {
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.flow__number {
  color: var(--color-rust);
  font-family: var(--font-body);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.flow__item p {
  margin: 0;
}

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

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

.comparison__row:last-child {
  border-block-end: 0;
}

.comparison__label {
  color: var(--color-accent-ink);
  font-weight: 700;
}

.comparison__row p {
  margin: 0;
}

.checklist {
  list-style: none;
  margin: var(--space-xl) 0;
  padding: 0;
  counter-reset: field-check;
}

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

.checklist li::before {
  content: counter(field-check, decimal-leading-zero);
  color: var(--color-rust);
  font-family: var(--font-body);
  font-variant-numeric: tabular-nums;
}

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

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

.source-list h2 {
  margin-block-end: var(--space-sm);
  font-size: var(--text-md);
}

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

.chapter-nav {
  display: grid;
  gap: var(--space-sm);
  max-width: var(--measure);
  margin: var(--space-3xl) auto 0;
  padding-block: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
}

.chapter-nav a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  line-height: 1;
}

.site-footer {
  max-width: 60ch;
  margin-inline: auto;
  padding: var(--space-2xl) var(--page-gutter) var(--space-3xl);
  border-block-start: var(--rule-hair) solid var(--color-rule-strong);
}

.site-footer__close {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  line-height: 1.4;
}

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

@media (min-width: 40rem) {
  .comparison__row {
    grid-template-columns: minmax(8rem, 0.8fr) minmax(0, 2.2fr);
    gap: var(--space-xl);
  }

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

@media (min-width: 60rem) {
  .hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
    gap: var(--space-3xl);
  }

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

@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;
  }
}

@media print {
  .skip-link,
  .theme-toggle {
    display: none;
  }

  .masthead__nav {
    display: none;
  }

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