/* West Ham & the River Lea — redesign prototype (docs2)
   Dark, overcast stage; parchment essay; the scene is the page. */

@font-face {
  font-family: 'Libre Caslon Text';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/caslon-400-normal.woff2) format('woff2');
}
@font-face {
  font-family: 'Libre Caslon Text';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/caslon-400-italic.woff2) format('woff2');
}
@font-face {
  font-family: 'Libre Caslon Text';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/caslon-700-normal.woff2) format('woff2');
}
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 100 900;
  font-stretch: 75% 125%;
  font-display: swap;
  src: url(fonts/archivo-100-900-normal.woff2) format('woff2');
}

:root {
  --ink: #0f1716;
  --ink-2: #15211f;
  --ink-3: #1d2b29;
  --teal: #233d3b;
  --parchment: #f2ede1;
  --parchment-2: #e7e1d1;
  --paper-ink: #1b2c2a;
  --fog: #c9cfc8;
  --muted: #9aa89f;
  --muted-light: #5b6e64;
  --amber: #d6a54d;
  --amber-2: #e9c176;
  --rust: #b56826;
  --line: rgba(242, 237, 225, 0.14);
  --line-strong: rgba(242, 237, 225, 0.28);
  --glass: rgba(15, 23, 22, 0.72);
  --serif: 'Libre Caslon Text', Georgia, 'Times New Roman', serif;
  --sans: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gutter: clamp(18px, 4vw, 64px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  font-family: var(--sans);
  color: var(--parchment);
  background: var(--ink);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
body {
  margin: 0;
  min-height: 100vh;
}
h1,
h2,
h3,
p,
dl,
dd {
  margin: 0;
}
a {
  color: inherit;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
kbd {
  font: 600 0.78em/1 var(--sans);
  letter-spacing: 0.04em;
  padding: 0.25em 0.4em;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  margin: 0 0.08em;
  vertical-align: 0.05em;
}
cite {
  font-style: italic;
}
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}
.eyebrow {
  font: 600 11px/1.3 var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 14px;
}
.small {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}
.skip {
  position: absolute;
  top: -80px;
  left: 12px;
  z-index: 60;
  padding: 14px 18px;
  background: var(--parchment);
  color: var(--ink);
  font-weight: 600;
  border-radius: 4px;
}
.skip:focus {
  top: 12px;
}

/* ---------- Header ---------- */
.site {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  padding: 18px var(--gutter);
  color: var(--parchment);
  transition:
    background 0.5s,
    border-color 0.5s,
    padding 0.4s;
}
.site::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transition: opacity 0.5s;
  z-index: -1;
}
.site.is-scrolled {
  padding-block: 12px;
}
.site.is-scrolled::before {
  opacity: 1;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}
.brand-title {
  font: 20px/1 var(--serif);
  letter-spacing: -0.01em;
}
.brand-title em {
  font-style: italic;
  color: var(--amber);
}
.brand-sub {
  font: 500 10px/1.2 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.chapters {
  display: flex;
  justify-content: center;
  gap: 2px;
}
.chapters a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  text-decoration: none;
  border-radius: 3px;
  font: 500 12px/1 var(--sans);
  letter-spacing: 0.04em;
  color: var(--fog);
  position: relative;
  transition:
    color 0.3s,
    background 0.3s;
}
.chapters a span {
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.08em;
  transition: color 0.3s;
}
.chapters a b {
  font-weight: 500;
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  opacity: 0;
  transition:
    max-width 0.45s var(--ease),
    opacity 0.3s;
}
.chapters a:hover,
.chapters a:focus-visible {
  color: var(--parchment);
  background: rgba(242, 237, 225, 0.06);
}
.chapters a[aria-current='true'] {
  color: var(--parchment);
}
.chapters a[aria-current='true'] span {
  color: var(--amber);
}
.chapters a[aria-current='true'] b,
.chapters a:hover b,
.chapters a:focus-visible b {
  max-width: 180px;
  opacity: 1;
}
.site-links {
  display: flex;
  align-items: center;
  gap: 14px;
  font: 500 12px/1 var(--sans);
  letter-spacing: 0.04em;
}
.site-links a {
  color: var(--fog);
  text-decoration: none;
  padding: 9px 4px;
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.3s,
    color 0.3s;
}
.site-links a:hover {
  color: var(--parchment);
  border-color: var(--amber);
}
.site-links button {
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  color: var(--parchment);
  transition:
    background 0.3s,
    border-color 0.3s;
}
.site-links button:hover {
  background: rgba(242, 237, 225, 0.1);
  border-color: var(--parchment);
}

/* ---------- Stage ---------- */
.scrolly {
  position: relative;
}
.stage {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: #1a2322;
  z-index: 1;
}
#panorama {
  position: absolute;
  inset: 0;
  touch-action: pan-y;
  outline-offset: -4px;
}
body.is-explore #panorama {
  touch-action: none;
}
#panorama canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.4s var(--ease);
}
#panorama.is-ready canvas {
  opacity: 1;
}
.poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
  transform: scale(1.02);
  transition: opacity 1.6s var(--ease) 0.2s;
  filter: saturate(0.92);
}
#panorama.is-ready .poster {
  opacity: 0;
}
.veil {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background:
    radial-gradient(120% 95% at 50% 42%, transparent 58%, rgba(8, 14, 13, 0.42) 100%),
    linear-gradient(
      to bottom,
      rgba(8, 14, 13, 0.55) 0,
      rgba(8, 14, 13, 0.18) 16%,
      transparent 34%,
      transparent 66%,
      rgba(8, 14, 13, 0.55) 100%
    );
}

.loading {
  position: absolute;
  left: 50%;
  bottom: clamp(96px, 14vh, 140px);
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  pointer-events: none;
  transition: opacity 0.6s;
}
#panorama.is-ready .loading {
  opacity: 0;
}
.loading-text {
  font: 500 11px/1 var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--parchment);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.6);
  text-align: center;
  max-width: 70vw;
}
.loading.is-stalled .loading-text {
  text-transform: none;
  letter-spacing: 0;
  font-size: 14px;
  line-height: 1.5;
  max-width: min(520px, 80vw);
}
.loading-bar {
  width: 180px;
  height: 2px;
  background: rgba(242, 237, 225, 0.22);
  border-radius: 2px;
  overflow: hidden;
}
#loading-fill {
  display: block;
  height: 100%;
  width: 4%;
  background: var(--amber);
  transition: width 0.35s var(--ease);
}
.loading.is-stalled .loading-bar {
  display: none;
}

.hero {
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: clamp(64px, 12vh, 128px);
  z-index: 4;
  max-width: min(760px, 80vw);
  pointer-events: none;
  will-change: opacity, transform;
}
.hero .eyebrow {
  color: var(--amber-2);
}
.hero h1 {
  font: 400 clamp(56px, 9.5vw, 142px)/0.92 var(--serif);
  letter-spacing: -0.025em;
  color: var(--parchment);
  text-shadow: 0 2px 28px rgba(0, 0, 0, 0.35);
}
.hero .lede {
  margin-top: 26px;
  max-width: 38ch;
  font: 400 clamp(17px, 1.5vw, 22px)/1.5 var(--serif);
  color: var(--parchment);
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.45);
}
.hero.is-dismissed {
  opacity: 0 !important;
  visibility: hidden;
  transform: translateY(-24px) !important;
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease),
    visibility 0s 0.7s;
}
.hero-close {
  pointer-events: auto;
  margin-left: 10px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
  background: rgba(15, 23, 22, 0.35);
  transition:
    background 0.2s,
    color 0.2s,
    border-color 0.2s;
}
.hero-close:hover {
  background: rgba(242, 237, 225, 0.12);
  color: var(--parchment);
  border-color: var(--parchment);
}
.hero .cue {
  margin-top: 34px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font: 500 11px/1 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
}
.cue-line {
  display: inline-block;
  width: 1px;
  height: 38px;
  background: linear-gradient(var(--amber), transparent);
  position: relative;
  overflow: hidden;
}
.cue-line::after {
  content: '';
  position: absolute;
  left: 0;
  top: -38px;
  width: 1px;
  height: 38px;
  background: var(--parchment);
  animation: drop 2.4s var(--ease) infinite;
}
@keyframes drop {
  to {
    top: 38px;
  }
}

.hud {
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  z-index: 5;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}
.hud-top {
  top: 86px;
  align-items: flex-start;
}
.badge {
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
  padding: 9px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: rgba(15, 23, 22, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.bearing {
  display: flex;
  align-items: center;
  gap: 10px;
}
.compass {
  width: 52px;
  height: 52px;
  overflow: visible;
}
.compass-ring {
  fill: rgba(15, 23, 22, 0.35);
  stroke: var(--line-strong);
  stroke-width: 1.5;
}
.tick {
  stroke: var(--fog);
  stroke-width: 1.5;
  opacity: 0.7;
}
.tick-n {
  stroke: var(--amber);
  opacity: 1;
  stroke-width: 2.5;
}
.rose-n {
  font: 700 15px var(--sans);
  fill: var(--amber);
  text-anchor: middle;
  dominant-baseline: central;
}
.needle {
  fill: var(--parchment);
}
#rose {
  transition: transform 0.15s linear;
  transform-origin: 0 0;
}
#bearing {
  font: 600 12px/1 var(--sans);
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  color: var(--parchment);
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: rgba(15, 23, 22, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  min-width: 82px;
  text-align: center;
}

.hud-bottom {
  bottom: 26px;
  align-items: flex-end;
}
.hint {
  font: 500 11px/1.6 var(--sans);
  letter-spacing: 0.06em;
  color: var(--fog);
  max-width: 34ch;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: opacity 0.4s;
}
body.is-explore .hint {
  opacity: 1;
}
.controls {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  pointer-events: auto;
}
.walk {
  display: grid;
  grid-template-columns: auto;
  justify-items: center;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
#walk-position {
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.pad {
  display: grid;
  grid-template-columns: repeat(3, 38px);
  grid-template-rows: repeat(2, 38px);
  gap: 4px;
}
.pad button {
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-size: 18px;
  color: var(--parchment);
  background: rgba(242, 237, 225, 0.04);
  touch-action: none;
  user-select: none;
  transition:
    background 0.2s,
    border-color 0.2s;
}
.pad [data-walk='forward'] {
  grid-column: 2;
}
.pad [data-walk='left'] {
  grid-column: 1;
  grid-row: 2;
}
.pad [data-walk='back'] {
  grid-column: 2;
  grid-row: 2;
}
.pad [data-walk='right'] {
  grid-column: 3;
  grid-row: 2;
}
.sides {
  display: flex;
  gap: 4px;
}
.sides button,
.card-actions button {
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 9px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--fog);
  transition:
    background 0.2s,
    color 0.2s,
    border-color 0.2s;
}
button:disabled {
  opacity: 0.4;
  cursor: default;
}
.pad button:not(:disabled):hover,
.sides button:not(:disabled):hover,
.card-actions button:not(:disabled):hover,
.tools button:hover {
  background: rgba(242, 237, 225, 0.12);
  border-color: var(--parchment);
  color: var(--parchment);
}
.pad button[data-active='true'],
[data-side][aria-pressed='true'] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}
.tools {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tools button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 20px;
  line-height: 1;
  color: var(--parchment);
  transition:
    background 0.2s,
    border-color 0.2s;
}
.minimap {
  position: relative;
  width: 168px;
  height: 168px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  overflow: hidden;
  background: #e6e2d5;
  display: block;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.7);
  transition:
    transform 0.35s var(--ease),
    border-color 0.3s;
}
.minimap:hover {
  transform: translateY(-2px);
  border-color: var(--amber);
}
.minimap-plan,
.minimap-plan svg {
  display: block;
  width: 100%;
  height: 100%;
}
.minimap-plan svg {
  transform: scale(1.06);
}
.minimap-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 7px 0 6px;
  font: 600 9px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--parchment);
  background: linear-gradient(transparent, rgba(15, 23, 22, 0.85) 40%);
}

/* ---------- Scroll narrative ---------- */
.steps {
  position: relative;
  z-index: 3;
  margin-top: -100vh;
  margin-top: -100dvh;
  pointer-events: none;
}
.step {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
}
.step-hero {
  pointer-events: none;
}
.card {
  pointer-events: auto;
  width: min(480px, 92vw);
  padding: 34px 38px 30px;
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(1.25);
  -webkit-backdrop-filter: blur(16px) saturate(1.25);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.8);
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.7s var(--ease),
    transform 0.9s var(--ease);
}
.step.is-active .card {
  opacity: 1;
  transform: none;
}
.card .eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--amber);
}
.card .eyebrow span {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.1em;
  color: var(--parchment);
  padding: 6px 7px;
  border: 1px solid var(--amber);
  border-radius: 2px;
}
.card h2 {
  font: 400 clamp(30px, 3vw, 40px)/1.08 var(--serif);
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.card > p:not(.eyebrow):not(.source) {
  font: 400 16.5px/1.6 var(--serif);
  color: var(--parchment);
}
.card details {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 6px;
}
.card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  font: 600 11px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog);
}
.card summary::-webkit-details-marker {
  display: none;
}
.card summary::before {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--amber);
  border-bottom: 1.5px solid var(--amber);
  transform: rotate(-45deg);
  transition: transform 0.3s;
}
.card details[open] summary::before {
  transform: rotate(45deg);
}
.card details p {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--fog);
  padding: 6px 0 10px;
}
.card .source {
  margin-top: 16px;
  font: 400 11.5px/1.55 var(--sans);
  letter-spacing: 0.01em;
  color: var(--muted);
}
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 22px;
}
.card-actions button {
  padding: 12px 14px;
  color: var(--parchment);
}
.step-explore .card {
  width: min(420px, 92vw);
}

/* ---------- Essay (parchment) ---------- */
.essay {
  position: relative;
  z-index: 4;
  background: var(--parchment);
  color: var(--paper-ink);
  padding: clamp(80px, 11vw, 150px) var(--gutter);
}
.essay::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: var(--parchment);
}
.essay-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: clamp(40px, 7vw, 120px);
  align-items: start;
}
.essay .eyebrow {
  color: var(--rust);
}
.essay h2 {
  font: 400 clamp(40px, 5vw, 68px)/1.02 var(--serif);
  letter-spacing: -0.025em;
  margin-bottom: 34px;
}
.essay-lede {
  font: 400 clamp(19px, 1.6vw, 23px)/1.6 var(--serif);
  max-width: 60ch;
  margin-bottom: 26px;
}
.essay-lede::first-letter {
  font-size: 3.1em;
  float: left;
  line-height: 0.82;
  padding: 0.08em 0.12em 0 0;
  color: var(--rust);
}
.essay .small,
.evidence .small {
  color: var(--muted-light);
}
.facts {
  display: grid;
  gap: 0;
  border-top: 1px solid #c9c2ae;
  margin-top: 14px;
}
.facts div {
  padding: 22px 0;
  border-bottom: 1px solid #c9c2ae;
}
.facts dt {
  font: 400 40px/1 var(--serif);
  letter-spacing: -0.02em;
  color: var(--teal);
  margin-bottom: 10px;
  font-variant-numeric: oldstyle-nums;
}
.facts dd {
  font: 400 15px/1.6 var(--sans);
  color: var(--muted-light);
  max-width: 36ch;
}

/* ---------- Evidence ---------- */
.evidence {
  position: relative;
  z-index: 4;
  background: var(--parchment-2);
  color: var(--paper-ink);
  padding: clamp(72px, 9vw, 120px) var(--gutter);
  scroll-margin-top: 60px;
}
.evidence-inner {
  max-width: 1180px;
  margin: 0 auto;
}
.evidence .eyebrow {
  color: var(--rust);
}
.evidence-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(32px, 6vw, 100px);
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 72px);
  padding-bottom: 36px;
  border-bottom: 1px solid #c4bda8;
}
.evidence h2 {
  font: 400 clamp(36px, 4.5vw, 60px)/1.02 var(--serif);
  letter-spacing: -0.025em;
}
.evidence-lede {
  font: 400 17px/1.65 var(--serif);
  max-width: 58ch;
}
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 56px) clamp(28px, 4vw, 48px);
}
.evidence-item h3 {
  font: 700 13px/1.4 var(--sans);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
  padding-top: 14px;
  border-top: 2px solid var(--teal);
}
.evidence-item p {
  font: 400 15px/1.7 var(--serif);
}
.evidence-item a {
  color: var(--rust);
}
.evidence-foot {
  margin-top: 56px;
  max-width: 70ch;
}

/* ---------- Footer ---------- */
.site-foot {
  position: relative;
  z-index: 4;
  background: var(--ink);
  color: var(--fog);
  padding: 56px var(--gutter) 64px;
  border-top: 1px solid var(--line);
}
.foot-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.foot-title {
  font: 400 20px/1.4 var(--serif);
  color: var(--parchment);
}

/* ---------- Dialog ---------- */
dialog {
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--ink-2);
  color: var(--parchment);
  width: min(860px, 94vw);
  max-height: 92dvh;
  padding: 30px;
  box-shadow: 0 60px 120px -40px rgba(0, 0, 0, 0.9);
}
dialog::backdrop {
  background: rgba(6, 11, 10, 0.7);
  backdrop-filter: blur(4px);
}
.dialog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.dialog-head h2 {
  font: 400 clamp(26px, 3vw, 36px)/1.1 var(--serif);
  letter-spacing: -0.02em;
}
.dialog-head button {
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-size: 16px;
}
.dialog-head button:hover {
  background: rgba(242, 237, 225, 0.1);
}
#plan svg {
  display: block;
  width: 100%;
  max-height: 58vh;
  background: #e6e2d5;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  margin-bottom: 16px;
}
#plan text,
.minimap-plan text {
  font-family: var(--sans);
  font-size: 24px;
  font-weight: 600;
  paint-order: stroke;
  stroke: #f2ede1;
  stroke-width: 7px;
  stroke-linejoin: round;
  fill: #233d3b;
}
.minimap-plan text {
  display: none;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 14px;
  font: 500 11px/1 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.legend .l-water {
  color: #8fb1b3;
}
.legend .l-site {
  color: #c2a98a;
}
.legend .l-house {
  color: #c88c76;
}
.legend .l-garden {
  color: #9fb586;
}
.legend .l-camera {
  color: var(--amber);
}
.no-script {
  position: relative;
  z-index: 6;
  margin: 0;
  padding: 18px var(--gutter);
  background: var(--amber);
  color: var(--ink);
  font-weight: 600;
}

/* Touch devices: drop backdrop blur (expensive over a full-screen WebGL canvas) for solid glass. */
@media (pointer: coarse), (max-width: 760px) {
  .site::before,
  .card,
  .walk,
  .tools button,
  .badge,
  #bearing {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .site::before,
  .card,
  .walk,
  .tools button {
    background: rgba(15, 23, 22, 0.9);
  }
  .badge,
  #bearing {
    background: rgba(15, 23, 22, 0.7);
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .chapters a b {
    display: none;
  }
  .chapters a {
    padding: 9px 8px;
  }
}
@media (max-width: 900px) {
  .site {
    grid-template-columns: auto 1fr auto;
    gap: 12px;
  }
  .chapters {
    gap: 0;
  }
  .chapters a {
    padding: 8px 6px;
    font-size: 11px;
  }
  .site-links a:not(.site-maps) {
    display: none;
  }
  .site-links {
    gap: 8px;
  }
  .minimap {
    display: none;
  }
  .essay-inner,
  .evidence-head {
    grid-template-columns: 1fr;
  }
  .evidence-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 760px) {
  .site {
    padding: 12px var(--gutter);
  }
  .brand-title {
    font-size: 17px;
  }
  .brand-sub {
    display: none;
  }
  .chapters {
    justify-content: flex-end;
  }
  .chapters a {
    padding: 8px 5px;
  }
  .chapters a span {
    font-size: 10px;
  }
  .hud-top {
    top: 66px;
  }
  .badge {
    display: none;
  }
  .compass {
    width: 44px;
    height: 44px;
  }
  .hero {
    bottom: auto;
    top: 24vh;
    max-width: none;
    right: var(--gutter);
  }
  .hero h1 {
    font-size: clamp(50px, 15vw, 80px);
  }
  .hero .lede {
    font-size: 17px;
    margin-top: 18px;
  }
  .hero .cue {
    margin-top: 22px;
    gap: 12px;
  }
  .hero-close span {
    display: none;
  }
  .hero-close {
    min-width: 44px;
    min-height: 44px;
    justify-content: center;
    margin-left: 0;
    font-size: 14px;
  }
  .hint {
    display: none;
  }
  .hud-bottom {
    bottom: 14px;
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
  }
  body.is-explore .hud-bottom {
    opacity: 1;
  }
  body.is-explore .controls {
    pointer-events: auto;
    width: 100%;
    justify-content: space-between;
    align-items: flex-end;
  }
  .walk {
    padding: 10px;
  }
  .pad {
    grid-template-columns: repeat(3, 42px);
    grid-template-rows: repeat(2, 42px);
  }
  .tools {
    flex-direction: row;
  }
  .step {
    align-items: flex-end;
    padding: 0 10px 10px;
  }
  .card {
    width: 100%;
    padding: 24px 22px 20px;
    border-radius: 10px;
    max-height: 56dvh;
    overflow: auto;
    overscroll-behavior: contain;
  }
  .card h2 {
    font-size: 27px;
    margin-bottom: 12px;
  }
  .card > p:not(.eyebrow):not(.source) {
    font-size: 15.5px;
  }
  .step-explore {
    align-items: flex-start;
    padding-top: calc(60px + env(safe-area-inset-top));
  }
  .step-explore .card {
    width: 100%;
    max-height: none;
    padding: 18px 20px;
  }
  .step-explore .card h2 {
    font-size: 22px;
    margin-bottom: 8px;
  }
  .step-explore .card > p:not(.eyebrow) {
    font-size: 14px;
  }
  .card-actions button {
    padding: 10px 12px;
  }
  .evidence-grid {
    grid-template-columns: 1fr;
  }
  .facts dt {
    font-size: 32px;
  }
  dialog {
    padding: 20px;
    width: calc(100vw - 20px);
  }
  #plan svg {
    max-height: none;
  }
}
@media (max-height: 640px) and (min-width: 761px) {
  .hero {
    bottom: 40px;
  }
  .hero h1 {
    font-size: clamp(44px, 7vw, 80px);
  }
  .hero .lede {
    margin-top: 14px;
  }
  .hero .cue {
    margin-top: 18px;
  }
  .minimap {
    width: 120px;
    height: 120px;
  }
  .card {
    padding: 22px 26px;
  }
  .card h2 {
    font-size: 26px;
  }
}

/* District flight controls stay available while the reader explores. */
.travel {
  position: absolute;
  top: 140px;
  left: var(--gutter);
  z-index: 5;
  width: min(300px, calc(100vw - 2 * var(--gutter)));
  padding: 12px;
  background: var(--glass);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  backdrop-filter: blur(12px);
  font: 500 12px/1.4 var(--sans);
  /* panel-fit.js caps the height above the controls and title below; the rest scrolls inside the panel. */
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
/* The panel is a disclosure: always open on larger screens (its summary hidden), closed by default on phones. */
.travel-body {
  display: grid;
  gap: 8px;
}
.travel-summary {
  display: none;
}
.travel button {
  padding: 10px;
  border: 1px solid var(--amber);
  border-radius: 4px;
  color: var(--parchment);
  background: #34443a;
  font: 600 12px var(--sans);
}
.travel label,
#flight-controls label {
  color: var(--fog);
  font: 500 11px var(--sans);
}
.tide-controls {
  border-top: 1px solid var(--line-strong);
  padding-top: 8px;
}
.tide-controls summary {
  cursor: pointer;
  color: var(--parchment);
  padding: 4px 0;
}
.tide-controls label {
  display: block;
  margin-top: 8px;
}
.tide-controls input {
  display: block;
  width: 100%;
  margin: 6px 0 0;
  accent-color: var(--amber);
}
.tide-extremes {
  display: flex;
  justify-content: space-between;
  color: var(--fog);
  font-size: 10px;
}
.tide-controls button {
  width: 100%;
  margin-top: 8px;
}
.tide-controls p {
  font-size: 10px;
  line-height: 1.4;
  color: var(--fog);
  margin: 8px 0 0;
}
.travel select,
#travel-speed {
  width: 100%;
  min-width: 0;
  background: #23302b;
  color: var(--parchment);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 8px;
  font: 500 12px var(--sans);
}
#flight-controls:not([hidden]) {
  display: grid;
  gap: 6px;
  width: 100%;
}
[hidden] {
  display: none !important;
}
body.is-roaming {
  overflow: hidden;
}
body.is-roaming .hero,
body.is-roaming .step .card {
  visibility: hidden;
  pointer-events: none;
}
body.is-roaming #panorama {
  touch-action: none;
}
body.is-roaming .hud-bottom,
body.is-roaming .hint {
  opacity: 1;
}
body.is-roaming .controls {
  pointer-events: auto;
}
#plan svg {
  cursor: crosshair;
}
@media (max-width: 760px) {
  .hero {
    top: 285px;
  }
  .travel {
    top: 118px;
    width: min(280px, calc(100vw - 2 * var(--gutter)));
  }
  /* Phones: the controls fold into one small button so the scene is not covered. */
  .travel:not([open]) {
    width: auto;
    padding: 0;
    border: 0;
    background: none;
  }
  .travel-summary {
    display: block;
    width: max-content;
    padding: 9px 12px;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    color: var(--parchment);
    background: rgba(15, 23, 22, 0.85);
    font: 600 12px var(--sans);
    cursor: pointer;
    list-style: none;
  }
  .travel-summary::-webkit-details-marker {
    display: none;
  }
  .travel-summary::before {
    content: '▸ ';
  }
  .travel[open] .travel-summary {
    margin-bottom: 8px;
  }
  .travel[open] .travel-summary::before {
    content: '▾ ';
  }
  /* One-line title; the chapter numbers give way on narrow phones (the cards carry them). */
  .brand-title {
    white-space: nowrap;
  }
  body.is-roaming .controls {
    width: 100%;
    justify-content: space-between;
    align-items: flex-end;
  }
  body.is-roaming .tools {
    flex-direction: column;
  }
}
@media (max-height: 600px) {
  .travel {
    top: 75px;
    left: auto;
    right: var(--gutter);
    width: 250px;
    padding: 8px;
    gap: 4px;
  }
  .travel button,
  .travel select {
    padding: 6px;
  }
}

/* Regional historical plans */
.footprint-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
}
.footprint-switch input {
  width: auto;
  accent-color: var(--gold, #c8a45d);
}
.map-scope {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font: 500 13px var(--sans);
}
.map-scope select {
  padding: 7px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: #f2ede1;
  color: #233d3b;
}
@media (max-width: 560px) {
  .chapters {
    display: none;
  }
  .site {
    grid-template-columns: 1fr auto;
  }
  .brand-title {
    font-size: 16px;
  }
  .site-links a,
  .site-links button {
    padding: 7px 9px;
    font-size: 11px;
  }
  .compass {
    width: 36px;
    height: 36px;
  }
}