:root {
  --color-bg: #F3F0E8;
  --color-surface: #E7E1D4;
  --color-surface-alt: #DDD4C3;
  --color-text: #1E2430;
  --color-muted: #5E6773;
  --color-accent: #0F6B5B;
  --color-accent-alt: #C65A2E;
  --color-line: #8C8A7E;
  --color-line-soft: rgba(140, 138, 126, 0.32);
  --color-ink-soft: rgba(30, 36, 48, 0.08);
  --color-ink-mid: rgba(30, 36, 48, 0.16);
  --font-display: "Bricolage Grotesque", "Arial Narrow", sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-ui: "IBM Plex Sans", Helvetica, sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --shadow-soft: 0 1px 0 rgba(30,36,48,0.06), 0 0 0 1px rgba(140,138,126,0.18);
  --shadow-lifted: 0 8px 24px rgba(30,36,48,0.08), 0 0 0 1px rgba(140,138,126,0.22);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --container-width: 1280px;
  --gutter: clamp(16px, 2.4vw, 32px);
  --measure: 68ch;
  --transition-fast: 180ms ease;
  --transition-mid: 260ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(to bottom, rgba(255,255,255,0.18), rgba(255,255,255,0)) fixed,
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: rgba(15, 107, 91, 0.55);
  text-underline-offset: 0.16em;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

img,
svg {
  max-width: 100%;
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent-alt);
  outline-offset: 2px;
}

::selection {
  background: rgba(198, 90, 46, 0.18);
}

.page-shell {
  min-height: 100vh;
  position: relative;
}

.page-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(140, 138, 126, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 138, 126, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.18), transparent 45%);
}

.site-container {
  width: min(calc(100% - 2 * var(--gutter)), var(--container-width));
  margin-inline: auto;
}

.page-grid {
  display: grid;
  gap: var(--space-7);
}

.section-band {
  position: relative;
  padding-block: clamp(28px, 5vw, 56px);
}

.section-band--alt {
  background: linear-gradient(180deg, rgba(231,225,212,0.7), rgba(231,225,212,0.45));
  border-top: 1px solid var(--color-line-soft);
  border-bottom: 1px solid var(--color-line-soft);
}

.section-band--chapter {
  background: var(--color-surface);
  border-top: 2px solid var(--color-line);
  border-bottom: 1px solid var(--color-line-soft);
}

.section-rule,
.wayfinding-line,
.divider-grid {
  position: relative;
}

.section-rule::after,
.wayfinding-line::after {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  margin-top: var(--space-4);
  background: linear-gradient(90deg, var(--color-line), rgba(140,138,126,0.15));
}

.wayfinding-line--dashed::after,
.rule-dotted::after {
  background: repeating-linear-gradient(90deg, var(--color-line) 0 8px, transparent 8px 14px);
}

.wayfinding-line--accent::after {
  background: linear-gradient(90deg, var(--color-accent) 0 28%, rgba(15,107,91,0.12) 28% 100%);
}

.texture-coordinates,
.texture-registration {
  position: relative;
}

.texture-coordinates::before {
  content: "X 47.4979° N  •  Y 19.0402° E";
  position: absolute;
  top: 0;
  right: 0;
  transform: translateY(-100%);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.texture-registration::after {
  content: "+";
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  font-family: var(--font-ui);
  color: var(--color-line);
}

.eyebrow,
.section-kicker,
.utility-label,
.meta-label,
.route-note__label,
.chapter-index__label,
.route-table__label {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  line-height: 1.2;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.display-title,
.page-title,
.hero-spread__title,
.action-band__title {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}

.display-title,
.hero-spread__title {
  font-size: clamp(2.8rem, 8vw, 6.4rem);
}

.page-title {
  font-size: clamp(2.2rem, 6vw, 4.6rem);
}

.deck,
.lede,
.hero-spread__deck {
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  max-width: 58ch;
  color: var(--color-text);
}

.body-copy {
  max-width: var(--measure);
}

.body-copy p,
.deck,
.lede,
.hero-spread__deck {
  margin-block: 0 1em;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line-soft);
}

.meta-item {
  display: grid;
  gap: var(--space-1);
  min-width: 140px;
}

.meta-value,
.route-note__meta,
.site-footer__note,
.route-table__note,
.decision-matrix__value,
.planning-list__detail {
  font-family: var(--font-ui);
  font-size: 0.96rem;
  line-height: 1.5;
  color: var(--color-text);
}

.pull-quote {
  margin: 0;
  padding: var(--space-6) 0;
  border-top: 2px solid var(--color-line);
  border-bottom: 1px solid var(--color-line-soft);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 24ch;
}

.annotated-note,
.field-panel,
.route-note,
.comparison-strip,
.action-band,
.stat-ribbon {
  background: rgba(231, 225, 212, 0.55);
  border: 1px solid var(--color-line-soft);
  box-shadow: var(--shadow-soft);
}

.annotated-note,
.field-panel,
.route-note {
  padding: var(--space-5);
}

.annotated-note {
  border-left: 3px solid var(--color-accent-alt);
}

.stat-ribbon {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-line-soft);
}

.stat-ribbon__item {
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  display: grid;
  gap: var(--space-2);
}

.route-marker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-marker::before {
  content: "";
  width: 1.1rem;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--color-line);
}

.route-marker--primary::before {
  background: var(--color-accent);
}

.route-marker--secondary::before {
  background: var(--color-accent-alt);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(243, 240, 232, 0.92);
  border-bottom: 1px solid var(--color-line-soft);
}

.site-header__inner {
  width: min(calc(100% - 2 * var(--gutter)), var(--container-width));
  margin-inline: auto;
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  align-items: center;
  padding-block: var(--space-3);
}

.site-header__brand,
.site-footer__brand {
  display: grid;
  gap: var(--space-1);
  text-decoration: none;
}

.site-header__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.site-header__nav {
  justify-self: end;
}

.site-header__list,
.site-footer__nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
}

.site-header__link,
.site-footer__link,
.breadcrumb-trail__link,
.text-link {
  position: relative;
  font-family: var(--font-ui);
  font-size: 0.94rem;
  text-decoration: none;
}

.site-header__link::after,
.site-footer__link::after,
.text-link::after,
.breadcrumb-trail__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.18rem;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0.15);
  transform-origin: left;
  opacity: 0.4;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header__link:hover::after,
.site-header__link:focus-visible::after,
.site-footer__link:hover::after,
.site-footer__link:focus-visible::after,
.text-link:hover::after,
.text-link:focus-visible::after,
.breadcrumb-trail__link:hover::after,
.breadcrumb-trail__link:focus-visible::after,
.site-header__link--active::after,
.is-active::after {
  transform: scaleX(1);
  opacity: 1;
}

.site-header__link--active,
.is-active {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--color-line-soft);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
}

.breadcrumb-trail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  margin: 0 0 var(--space-5);
  list-style: none;
}

.breadcrumb-trail__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  color: var(--color-muted);
}

.breadcrumb-trail__item:not(:last-child)::after {
  content: "/";
  color: var(--color-line);
}

.hero-spread {
  padding-block: clamp(32px, 7vw, 88px) clamp(24px, 4vw, 48px);
}

.hero-spread__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: end;
}

.hero-spread__intro,
.hero-spread__aside {
  display: grid;
  gap: var(--space-4);
}

.hero-spread__meta {
  display: grid;
  gap: var(--space-4);
}

.hero-spread__figure {
  min-height: 240px;
  background:
    linear-gradient(135deg, rgba(15,107,91,0.12), transparent 55%),
    linear-gradient(0deg, rgba(221,212,195,0.75), rgba(231,225,212,0.35));
  border: 1px solid var(--color-line-soft);
  position: relative;
  overflow: hidden;
}

.hero-spread__figure::before,
.hero-spread__route-line::before {
  content: "";
  position: absolute;
  inset: 16% auto auto -8%;
  width: 120%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--color-accent) 0 18px, transparent 18px 28px);
  transform: rotate(-8deg);
}

.hero-spread__figure::after {
  content: "";
  position: absolute;
  right: 8%;
  bottom: 14%;
  width: 22%;
  aspect-ratio: 1;
  border: 1px solid var(--color-line);
  border-radius: 50%;
}

.hero-spread__caption {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--color-muted);
}

.hero-spread--flagship .hero-spread__grid {
  grid-template-columns: minmax(0, 1.9fr) minmax(260px, 0.85fr);
}

.hero-spread--orientation .hero-spread__figure::before {
  background: linear-gradient(90deg, var(--color-accent-alt), var(--color-accent));
}

.hero-spread--trust .hero-spread__figure,
.hero-spread--trust .annotated-note {
  background: rgba(231,225,212,0.34);
}

.editorial-columns {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-5);
}

.editorial-columns--2 > * {
  grid-column: span 6;
}

.editorial-columns--3 > * {
  grid-column: span 4;
}

.editorial-sidebar {
  grid-column: span 4;
}

.editorial-main {
  grid-column: span 8;
}

.zoned-layout,
.spread-split {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.85fr);
  gap: var(--space-6);
  align-items: start;
}

.zoned-layout__primary,
.spread-split__left {
  min-width: 0;
}

.zoned-layout__secondary,
.spread-split__right {
  min-width: 0;
}

.field-panel {
  display: grid;
  gap: var(--space-4);
}

.field-panel--annotated {
  border-left: 3px solid var(--color-accent);
}

.field-panel--surface {
  background: var(--color-surface);
}

.field-panel__header,
.field-panel__body,
.field-panel__footer {
  display: grid;
  gap: var(--space-3);
}

.field-panel__title,
.route-note__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.05;
}

.route-cluster {
  display: grid;
  gap: var(--space-4);
}

.route-cluster__item {
  border-top: 1px solid var(--color-line-soft);
  padding-top: var(--space-4);
}

.comparison-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--color-line-soft);
}

.comparison-strip__cell {
  background: var(--color-bg);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-2);
}

.route-table,
.decision-matrix {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--color-line);
  font-family: var(--font-ui);
}

.route-table__row,
.decision-matrix__row,
.route-table tr,
.decision-matrix tr {
  border-bottom: 1px solid var(--color-line-soft);
}

.route-table__head,
.route-table th,
.decision-matrix th {
  text-align: left;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
}

.route-table__cell,
.route-table td,
.decision-matrix td,
.decision-matrix__value {
  padding: var(--space-4) var(--space-3) var(--space-4) 0;
  vertical-align: top;
}

.planning-list {
  display: grid;
  gap: var(--space-4);
  margin: 0;
}

.planning-list__item {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-top: 1px dotted var(--color-line);
}

.planning-list__term {
  font-family: var(--font-ui);
  font-weight: 600;
}

.action-band {
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  gap: var(--space-4);
  border-left: 3px solid var(--color-accent);
}

.action-band__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
}

.text-link--accent,
.utility-button--primary {
  color: var(--color-accent);
}

.utility-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0.72rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-ui);
}

.utility-button--primary {
  border-color: var(--color-accent);
}

.utility-button--secondary {
  background: var(--color-surface);
}

.chapter-index {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.chapter-index::before {
  content: "";
  width: 48px;
  height: 1px;
  background: var(--color-line);
}

.site-footer {
  margin-top: var(--space-8);
  padding-block: var(--space-7);
  border-top: 2px solid var(--color-line);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  align-items: start;
}

.site-footer__meta {
  display: grid;
  gap: var(--space-3);
}

.is-muted {
  color: var(--color-muted);
}

[data-reveal] {
  transition: transform var(--transition-mid), opacity var(--transition-mid), border-color var(--transition-fast);
}

html.js [data-reveal] {
  opacity: 1;
}

html.js [data-reveal].is-revealed {
  transform: translateY(0);
}

html.js [data-reveal]:not(.is-revealed) {
  transform: translateY(10px);
}

[data-filter-group] {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.filter-chip {
  appearance: none;
  border: 1px solid var(--color-line-soft);
  background: transparent;
  color: var(--color-text);
  border-radius: 999px;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  cursor: pointer;
}

.filter-chip.is-active,
.filter-chip[aria-pressed="true"] {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

[data-filter-item].is-hidden {
  display: none;
}

[data-compare-table] [data-compare-row].is-emphasis {
  background: rgba(15, 107, 91, 0.06);
}

@media (max-width: 980px) {
  .hero-spread__grid,
  .zoned-layout,
  .spread-split,
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .editorial-main,
  .editorial-sidebar,
  .editorial-columns--2 > *,
  .editorial-columns--3 > * {
    grid-column: 1 / -1;
  }

  .stat-ribbon {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-header__nav {
    grid-column: 1 / -1;
    justify-self: stretch;
    display: none;
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-line-soft);
  }

  .site-header__nav.is-open {
    display: block;
  }

  .site-header__list {
    flex-direction: column;
    gap: var(--space-3);
  }
}

@media (max-width: 640px) {
  .section-band {
    padding-block: var(--space-6);
  }

  .display-title,
  .hero-spread__title {
    font-size: clamp(2.2rem, 14vw, 3.6rem);
  }

  .page-title {
    font-size: clamp(1.9rem, 11vw, 3rem);
  }

  .meta-row,
  .action-band__links,
  .site-footer__nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .planning-list__item {
    grid-template-columns: 1fr;
  }

  .stat-ribbon {
    grid-template-columns: 1fr;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  html.js [data-reveal]:not(.is-revealed) {
    transform: none;
  }
}