:root {
  --marine-950: #071d49;
  --marine-700: #0646a5;
  --clay-700: #a83a24;
  --clay-500: #d65a38;
  --potato-400: #e7b93c;
  --ice-100: #eaf2ff;
  --white: #ffffff;
  --charcoal: #291a16;
  --line: #b9c7de;
  --display: Georgia, "Times New Roman", serif;
  --body: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
  --step--1: clamp(.875rem, .84rem + .18vw, 1rem);
  --step-0: clamp(1rem, .95rem + .22vw, 1.125rem);
  --step-1: clamp(1.2rem, 1.08rem + .55vw, 1.55rem);
  --step-2: clamp(1.55rem, 1.28rem + 1.2vw, 2.25rem);
  --step-3: clamp(2rem, 1.45rem + 2.5vw, 3.6rem);
  --step-4: clamp(2.75rem, 1.7rem + 4.7vw, 6.4rem);
  --space-1: .5rem;
  --space-2: .875rem;
  --space-3: 1.25rem;
  --space-4: 2rem;
  --space-5: 3.25rem;
  --space-6: 5.25rem;
  --space-7: 8rem;
  --content-max: 86rem;
  --text-max: 42rem;
  --border: 2px solid var(--marine-950);
  --shadow-offset: .65rem .65rem 0 var(--potato-400);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--white);
  color: var(--charcoal);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.65;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: .2em; }
button, select, input { font: inherit; }
button, a, select, label { touch-action: manipulation; }
h1, h2, h3, p, figure { margin-top: 0; }
h1, h2, h3 {
  color: var(--marine-950);
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: .98;
}
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
p { max-width: var(--text-max); }
:focus-visible { outline: 4px solid var(--potato-400); outline-offset: 4px; }
[data-placeholder] { text-decoration: underline dotted rgba(168, 58, 36, .75); text-decoration-thickness: 1px; }

.skip-link {
  position: fixed;
  z-index: 100;
  left: var(--space-3);
  top: var(--space-3);
  transform: translateY(-200%);
  min-height: 44px;
  padding: .7rem 1rem;
  background: var(--potato-400);
  color: var(--marine-950);
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }
.content-shell {
  width: min(100% - 2rem, var(--content-max));
  max-width: var(--content-max);
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 20;
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: var(--border);
  background: var(--white);
}
.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: .7rem;
  padding: .5rem 1rem;
  color: var(--marine-950);
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}
.brand-mark {
  position: relative;
  display: inline-block;
  width: 2rem;
  height: 2rem;
  background: var(--clay-700);
  clip-path: polygon(0 100%, 14% 30%, 38% 18%, 60% 35%, 82% 0, 100% 100%);
}
.brand-mark span { position: absolute; inset: 42% 44% 0; background: var(--white); }
.menu-button {
  display: flex;
  min-width: 5.6rem;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  border: 0;
  border-left: var(--border);
  background: var(--marine-950);
  color: var(--white);
  cursor: pointer;
}
.menu-glyph, .menu-glyph::before, .menu-glyph::after { display: block; width: 1.25rem; height: 2px; background: currentColor; content: ""; }
.menu-glyph::before { transform: translateY(-6px); }
.menu-glyph::after { transform: translateY(4px); }
.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: none;
  padding: 1rem;
  border-bottom: var(--border);
  background: var(--white);
}
.site-nav.is-open { display: grid; }
.site-nav a {
  display: flex;
  min-height: 48px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  color: var(--marine-950);
  font-weight: 700;
  text-decoration: none;
}
.site-nav .nav-plan { color: var(--clay-700); }

.hero {
  position: relative;
  display: grid;
  min-height: clamp(38rem, 86svh, 56rem);
  overflow: hidden;
  background: var(--marine-950);
  color: var(--white);
}
.hero-image, .hero-shade, .hero-copy { grid-area: 1 / 1; }
.hero-image { width: 100%; height: 100%; object-fit: cover; }
.hero-shade { background: linear-gradient(180deg, rgba(7,29,73,.1), rgba(7,29,73,.92) 85%); }
.hero-copy {
  z-index: 1;
  align-self: end;
  width: min(100% - 2rem, var(--content-max));
  max-width: var(--content-max);
  margin-inline: auto;
  padding-block: var(--space-6) var(--space-4);
}
.hero h1 { max-width: 12ch; margin-bottom: var(--space-3); color: var(--white); }
.hero-deck { font-size: var(--step-1); line-height: 1.45; }
.route-stamp, .index-label {
  margin-bottom: var(--space-2);
  color: var(--clay-700);
  font-size: var(--step--1);
  font-weight: 800;
}
.route-stamp { color: var(--potato-400); }
.image-ticket {
  position: absolute;
  z-index: 2;
  top: var(--space-3);
  left: var(--space-3);
  max-width: 17rem;
  padding: .6rem .8rem;
  background: var(--potato-400);
  color: var(--marine-950);
  font-size: .78rem;
  font-weight: 700;
  line-height: 1.25;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: .7rem 1.2rem;
  border: 2px solid currentColor;
  font-weight: 800;
  text-decoration: none;
}
.button-light { background: var(--white); color: var(--marine-950); }
.button-dark { background: var(--marine-950); color: var(--white); }
.text-link { display: inline-flex; min-height: 44px; align-items: center; color: var(--marine-700); font-weight: 800; }

.section-grid, .chapter-list, .dispatch { padding-block: var(--space-6); }
.section-heading h2 { max-width: 17ch; }
.measure p { max-width: 58ch; }
.image-slot { margin: var(--space-4) 0 0; }
.image-slot img { width: 100%; border: var(--border); background: var(--ice-100); object-fit: cover; }
.image-slot figcaption {
  padding: .65rem .75rem;
  border-right: var(--border);
  border-bottom: var(--border);
  border-left: var(--border);
  color: var(--marine-950);
  font-size: var(--step--1);
  line-height: 1.4;
}
.image-slot-wide { grid-column: 1 / -1; }
.image-slot-wide img { aspect-ratio: 3 / 2; }

.composer-band {
  max-width: var(--content-max);
  margin-inline: auto;
  background: var(--marine-950);
  color: var(--white);
}
.composer { width: 100%; padding: var(--space-5) 1rem; }
.composer h2, .composer h3 { color: var(--white); }
.composer .index-label { color: var(--potato-400); }
.composer-controls { display: grid; gap: var(--space-3); margin-block: var(--space-4); }
.composer-controls fieldset { display: grid; gap: .35rem; margin: 0; padding: 0; border: 0; }
.composer-controls legend, .select-label { margin-bottom: .45rem; font-weight: 800; }
.composer-controls label { display: flex; min-height: 44px; align-items: center; gap: .65rem; }
.composer-controls input { width: 1.3rem; height: 1.3rem; accent-color: var(--potato-400); }
.composer-controls select { width: 100%; min-height: 48px; padding-inline: .75rem; border: 2px solid var(--white); border-radius: 0; background: var(--white); color: var(--marine-950); }
.route-output { border: 2px solid var(--white); background: var(--white); color: var(--charcoal); }
.route-map { position: relative; background: var(--ice-100); }
.route-map img { aspect-ratio: 4 / 3; object-fit: cover; }
.map-pin { position: absolute; width: 1.1rem; height: 1.1rem; border: 3px solid var(--white); border-radius: 50%; background: var(--clay-700); box-shadow: 0 0 0 2px var(--marine-950); }
.pin-a { top: 26%; left: 22%; }.pin-b { top: 56%; left: 50%; }.pin-c { top: 35%; left: 77%; }
.route-ledger { padding: var(--space-3); }
.route-selection { display: inline-block; padding: .25rem .55rem; background: var(--potato-400); color: var(--marine-950); font-size: var(--step--1); font-weight: 800; }
.route-ledger h3 { color: var(--marine-950); }
.route-ledger ol { margin: 0; padding: 0; list-style: none; }
.route-ledger li { display: grid; gap: .15rem; padding: .8rem 0; border-top: 1px solid var(--line); }
.route-ledger li span { color: var(--clay-700); font-size: var(--step--1); font-weight: 800; }
.route-note { margin: var(--space-3) 0 0; font-size: var(--step--1); }

.chapter-list { overflow: hidden; }
.chapter { padding-block: var(--space-4); border-top: var(--border); }
.chapter-number { display: block; margin-bottom: var(--space-2); color: var(--clay-700); font-family: var(--display); font-size: var(--step-2); font-weight: 700; }
.chapter-copy h3 { max-width: 18ch; }
.chapter .image-slot { margin-top: var(--space-3); }
.compact-chapter .image-slot { margin-top: 0; }
.portrait-slot img { aspect-ratio: 4 / 5; }

.dispatch { display: grid; gap: var(--space-4); border-top: .85rem solid var(--clay-700); }
.dispatch-image { margin: 0; }
.dispatch-image img { aspect-ratio: 1; }
.site-footer { margin-top: var(--space-5); background: var(--marine-950); color: var(--white); }
.footer-grid { display: grid; gap: var(--space-4); padding-block: var(--space-5); }
.footer-brand { padding-left: 0; color: var(--white); }
.site-footer h2 { margin-bottom: .75rem; color: var(--potato-400); font-family: var(--body); font-size: 1rem; letter-spacing: 0; }
.site-footer nav { display: grid; align-content: start; }
.site-footer nav a { display: flex; min-height: 44px; align-items: center; }
.footer-note { padding-top: var(--space-3); border-top: 1px solid rgba(255,255,255,.35); font-size: var(--step--1); }

/* Detail page */
.detail-hero { padding: var(--space-5) 0 0; background: var(--ice-100); }
.detail-hero-copy { width: min(100% - 2rem, var(--content-max)); max-width: var(--content-max); margin-inline: auto; }
.detail-hero h1 { max-width: 13ch; }
.detail-deck { font-size: var(--step-1); }
.fact-ribbon { display: grid; margin: var(--space-4) 0 0; background: var(--marine-950); color: var(--white); }
.fact-ribbon div { padding: 1rem; border-bottom: 1px solid rgba(255,255,255,.3); }
.fact-ribbon dt { color: var(--potato-400); font-size: var(--step--1); font-weight: 800; }
.fact-ribbon dd { margin: .2rem 0 0; }
.detail-body { display: grid; gap: var(--space-5); padding-block: var(--space-5); }
.detail-main section { padding-block: var(--space-4); border-top: var(--border); }
.detail-main h2 { max-width: 16ch; }
.detail-aside { align-self: start; padding: var(--space-3); border: var(--border); box-shadow: var(--shadow-offset); }
.detail-aside h2 { font-size: var(--step-2); }
.detail-aside ul { padding-left: 1.2rem; }
.detail-aside li { margin-bottom: .6rem; }
.photo-pair { display: grid; gap: var(--space-3); }
.photo-pair .image-slot { margin-top: 0; }
.next-stop { max-width: var(--content-max); margin-inline: auto; padding: var(--space-5) 1rem; background: var(--clay-700); color: var(--white); }
.next-stop h2 { color: var(--white); }

@media (min-width: 48rem) {
  .content-shell { width: min(100% - 3rem, var(--content-max)); }
  .menu-button { display: none; }
  .site-header { padding-left: 1rem; }
  .site-nav { position: static; display: flex; padding: 0; border: 0; }
  .site-nav a { min-height: 4rem; padding: 0 .8rem; border: 0; }
  .site-nav .nav-plan { padding-inline: 1rem; background: var(--clay-700); color: var(--white); }
  .hero-copy { width: min(100% - 4rem, var(--content-max)); padding-bottom: var(--space-5); }
  .section-grid { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: var(--space-4); }
  .composer { padding: var(--space-6) 2rem; }
  .composer-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .select-label { align-self: end; margin: 0; }
  .route-output { display: grid; grid-template-columns: minmax(0, 1fr) minmax(19rem, .8fr); }
  .chapter-featured { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: var(--space-5); align-items: center; }
  .chapter-pair, .photo-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
  .offset-pair { padding-left: 8%; }
  .dispatch { grid-template-columns: minmax(17rem, .65fr) minmax(0, 1.35fr); align-items: center; }
  .footer-grid { grid-template-columns: 1.5fr .8fr .8fr; }
  .footer-note { grid-column: 1 / -1; }
  .fact-ribbon { grid-template-columns: repeat(3, 1fr); }
  .fact-ribbon div { border-right: 1px solid rgba(255,255,255,.3); border-bottom: 0; }
}

@media (min-width: 72rem) {
  .site-header { padding-inline: calc((100vw - var(--content-max)) / 2); }
  .brand { padding-left: 0; }
  .site-nav a { padding-inline: 1.1rem; }
  .image-ticket { top: var(--space-4); left: max(var(--space-4), calc((100vw - var(--content-max)) / 2)); }
  .section-grid { grid-template-columns: minmax(0, .7fr) minmax(0, .7fr) minmax(0, 1.4fr); align-items: start; }
  .image-slot-wide { grid-column: 3; margin-top: 0; }
  .composer { display: grid; grid-template-columns: .65fr 1.35fr; column-gap: var(--space-5); }
  .composer-controls { align-content: start; grid-column: 1; }
  .route-output { grid-column: 2; grid-row: 1 / span 2; }
  .chapter-heading { display: grid; grid-template-columns: 1fr 2fr; gap: var(--space-5); }
  .chapter-heading h2 { max-width: 21ch; }
  .chapter-pair { gap: var(--space-6); }
  .detail-body { grid-template-columns: minmax(0, 1.4fr) minmax(18rem, .6fr); }
  .detail-aside { position: sticky; top: 2rem; }
}

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