/* Layout: a field notebook beside the chart. Story/Explore/Evidence panel left, map right; stacks on phones. */
:root {
  --bg: #F6EFE2; --surface: #FBF7EF; --ink: #2B1D14; --ink-muted: #5A4636; --line: #D9CBB4;
  --sea: #D3E0E0; --land: #F3EADB; --border-c: #BFAE95;
  --era-ink: #2B1D14; --era-scent: #8F5414; --era-water: #1F4E6B; --era-exchange: #4F6B2E;
  --era-motion: #9A4A1F; --era-conquest: #9E2F25; --era-masala: #6A3D6E; --highlight: #E2A72E;
  --on-era: #FFFFFF; --shadow: 0 1px 2px rgba(43,29,20,.12), 0 6px 18px rgba(43,29,20,.10);
  --f-display: "IM Fell English", "Iowan Old Style", Georgia, serif;
  --f-body: "Alegreya Sans", "Gill Sans", "Segoe UI", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --panel-w: 430px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1C1612; --surface: #26201A; --ink: #F1E7D6; --ink-muted: #C9B9A3; --line: #4A3D31;
    --sea: #15232A; --land: #2C241D; --border-c: #5A4A3B;
    --era-ink: #F1E7D6; --era-scent: #E3A54F; --era-water: #7FB3D1; --era-exchange: #A9C27A;
    --era-motion: #E08A5A; --era-conquest: #EE8676; --era-masala: #CFA3D3; --highlight: #F2C14E;
    --on-era: #1C1612; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1C1612; --surface: #26201A; --ink: #F1E7D6; --ink-muted: #C9B9A3; --line: #4A3D31;
  --sea: #15232A; --land: #2C241D; --border-c: #5A4A3B;
  --era-ink: #F1E7D6; --era-scent: #E3A54F; --era-water: #7FB3D1; --era-exchange: #A9C27A;
  --era-motion: #E08A5A; --era-conquest: #EE8676; --era-masala: #CFA3D3; --highlight: #F2C14E;
  --on-era: #1C1612; --shadow: 0 1px 2px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--f-body); }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--highlight); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.app { display: grid; grid-template-columns: var(--panel-w) minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); height: 100%; }
.topbar { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 20px; padding: 10px 18px; border-bottom: 1px solid var(--line); background: var(--surface); }
.brand { display: flex; flex-direction: column; min-width: 0; }
.brand h1 { margin: 0; font: 400 1.55rem/1.05 var(--f-display); letter-spacing: .01em; }
.brand p { margin: 2px 0 0; font: 500 .72rem/1.3 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-muted); }
.draft { font: 500 .7rem/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--era-conquest); border: 1px solid currentColor; padding: 5px 7px; border-radius: 3px; }
.modes { display: flex; gap: 4px; margin-left: auto; padding: 3px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); }
.modes button { border: 0; background: transparent; padding: 6px 14px; border-radius: 6px; cursor: pointer; font-weight: 500; color: var(--ink-muted); }
.modes button[aria-selected="true"] { background: var(--ink); color: var(--bg); }

.panel { overflow-y: auto; border-right: 1px solid var(--line); background: var(--bg); scroll-behavior: smooth; min-width: 0; }
.map-wrap { position: relative; min-width: 0; }
#map { position: absolute; inset: 0; background: var(--sea); }

/* Story */
.case-head { padding: 26px 22px 10px; }
.case-head .label { font: 500 .72rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--era); }
.case-head h2 { margin: 6px 0 8px; font: 400 2rem/1.05 var(--f-display); text-wrap: balance; }
.case-head .question { margin: 0; padding: 10px 12px; border-left: 3px solid var(--era); background: var(--surface); font-style: italic; color: var(--ink); }
.step { margin: 14px 16px 18px; padding: 18px 18px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; transition: border-color .25s, box-shadow .25s; scroll-margin-top: 20px; }
.step.active { border-color: var(--era); box-shadow: var(--shadow); }
.step h3 { margin: 0 0 8px; font: 400 1.45rem/1.15 var(--f-display); text-wrap: balance; }
.step p { margin: 0 0 10px; max-width: 62ch; }
.step .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); gap: 8px; margin-top: 10px; }
.thumb { padding: 0; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--bg); cursor: pointer; aspect-ratio: 1; }
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .3s; }
.thumb:hover img { transform: scale(1.05); }
.chip { display: inline-flex; align-items: center; gap: 6px; font: 500 .7rem/1 var(--f-mono); letter-spacing: .05em; text-transform: uppercase; padding: 5px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-muted); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.chip.cert-uncertain .dot { background: transparent; border: 1.5px dashed currentColor; }
.chip.cert-approximate .dot { background: transparent; border: 1.5px solid currentColor; }
.chip.cert-symbolic .dot { border-radius: 1px; transform: rotate(45deg); background: transparent; border: 1.5px solid currentColor; }
.stepnav { position: sticky; bottom: 0; display: flex; gap: 8px; justify-content: space-between; align-items: center; padding: 10px 16px; background: var(--surface); border-top: 1px solid var(--line); font: .8rem var(--f-mono); color: var(--ink-muted); }
.btn { border: 1px solid var(--border-c); background: var(--surface); padding: 6px 12px; border-radius: 6px; cursor: pointer; font-weight: 500; }
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.story-end { padding: 10px 22px 40px; color: var(--ink-muted); font-size: .9rem; }

/* Explore */
.section { padding: 18px 20px; border-bottom: 1px solid var(--line); }
.section h2 { margin: 0 0 4px; font: 400 1.5rem/1.1 var(--f-display); }
.section > p { margin: 0 0 12px; color: var(--ink-muted); }
.layer-group { margin: 12px 0 4px; font: 500 .72rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--era); }
.layer-row { display: grid; grid-template-columns: auto 18px minmax(0,1fr); gap: 10px; align-items: start; padding: 6px 0; cursor: pointer; }
.layer-row input { margin: 4px 0 0; width: 16px; height: 16px; accent-color: var(--era); }
.swatch { width: 18px; height: 4px; margin-top: 11px; background: var(--era); border-radius: 2px; }
.swatch.fuzzy { height: 12px; margin-top: 7px; border-radius: 50%; opacity: .5; }
.swatch.points { width: 10px; height: 10px; margin: 7px 4px 0; border-radius: 50%; }
.swatch.dashed { background: repeating-linear-gradient(90deg, var(--era) 0 5px, transparent 5px 8px); }
.layer-row strong { font-weight: 500; display: block; line-height: 1.3; }
.layer-row small { color: var(--ink-muted); display: block; line-height: 1.35; }
.legend-places { display: grid; gap: 6px; font-size: .92rem; }
.legend-places span { display: inline-flex; gap: 8px; align-items: center; }

/* Evidence */
.filters { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.filters button { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 4px 11px; cursor: pointer; font-size: .88rem; }
.filters button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.ev-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; padding: 16px 20px 30px; }
.ev-card { display: flex; flex-direction: column; text-align: left; padding: 0; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); cursor: pointer; overflow: hidden; }
.ev-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
.ev-card span { padding: 8px 10px 10px; display: flex; flex-direction: column; gap: 2px; }
.ev-card b { font-weight: 500; line-height: 1.25; }
.ev-card small { font: .72rem/1.3 var(--f-mono); color: var(--ink-muted); }

/* Map overlays */
.dial { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); width: min(560px, calc(100% - 32px)); padding: 12px 16px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); }
.dial-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.dial label { font: 500 .72rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--era-water); }
.dial output { font: 400 1.35rem/1 var(--f-display); }
.dial input[type=range] { width: 100%; accent-color: var(--era-water); margin: 8px 0 4px; }
.dial .ticks { display: grid; grid-template-columns: repeat(12, 1fr); font: .62rem/1 var(--f-mono); color: var(--ink-muted); text-align: center; }
.dial p { margin: 6px 0 0; font-size: .93rem; min-height: 2.8em; }
.dial .play { margin-left: auto; }
.mapnote { position: absolute; left: 12px; top: 12px; max-width: min(320px, calc(100% - 70px)); padding: 8px 12px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; font-size: .88rem; box-shadow: var(--shadow); }
.mapnote b { display: block; font: 400 1.05rem/1.2 var(--f-display); color: var(--era); }

.pin { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--ink); background: var(--highlight); cursor: pointer; padding: 0; box-shadow: 0 0 0 3px var(--bg); }
.pin.planned, .pin.hoped { background: var(--bg); border-style: dashed; }
.pin.next { animation: pulse 2.2s infinite; }
.pin.hl { transform: scale(1.35); }
@keyframes pulse { 0% { box-shadow: 0 0 0 3px var(--bg), 0 0 0 3px var(--highlight); } 70% { box-shadow: 0 0 0 3px var(--bg), 0 0 0 16px transparent; } 100% { box-shadow: 0 0 0 3px var(--bg), 0 0 0 3px transparent; } }
.pin-label { font: 500 .78rem/1 var(--f-body); background: var(--surface); color: var(--ink); padding: 3px 6px; border-radius: 4px; border: 1px solid var(--line); white-space: nowrap; pointer-events: none; transform: translate(14px, -50%); position: absolute; left: 0; top: 50%; }
.fuzzy-label { font: italic 400 1.15rem/1 var(--f-display); color: var(--ink); text-shadow: 0 0 4px var(--bg), 0 0 8px var(--bg); pointer-events: none; white-space: nowrap; }
.maplibregl-popup-content { background: var(--surface) !important; color: var(--ink); border: 1px solid var(--line); border-radius: 8px !important; padding: 8px 12px !important; font: .9rem/1.35 var(--f-body); box-shadow: var(--shadow) !important; }
.maplibregl-popup-tip { border-top-color: var(--surface) !important; border-bottom-color: var(--surface) !important; }
.maplibregl-popup-content b { font-weight: 500; }
.maplibregl-ctrl-attrib { background: color-mix(in srgb, var(--surface) 85%, transparent) !important; color: var(--ink-muted) !important; }
.maplibregl-ctrl-attrib a { color: var(--ink-muted) !important; }

/* Evidence dialog */
dialog.ev { width: min(980px, calc(100% - 24px)); max-height: calc(100% - 24px); padding: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
dialog.ev::backdrop { background: rgba(20, 14, 10, .55); }
.ev-body { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
.ev-fig { margin: 0; background: #120D0A; display: flex; flex-direction: column; justify-content: center; min-height: 300px; position: relative; }
.ev-fig img { width: 100%; max-height: 74vh; object-fit: contain; transition: transform .6s ease; }
.ev-fig img.flipped { transform: rotate(180deg); }
.ev-fig figcaption { color: #E8DCC8; font: .72rem/1.3 var(--f-mono); padding: 8px 12px; }
.ev-fig .flip { position: absolute; top: 10px; left: 10px; background: #F6EFE2; color: #2B1D14; border-color: #F6EFE2; }
.ev-text { padding: 20px 22px 22px; overflow-y: auto; max-height: calc(100vh - 40px); }
.ev-text h2 { margin: 6px 0 4px; font: 400 1.75rem/1.1 var(--f-display); text-wrap: balance; }
.ev-text .site { margin: 0 0 12px; color: var(--ink-muted); }
.tng { display: grid; gap: 10px; margin: 14px 0; }
.tng div { padding: 10px 12px; border-radius: 8px; background: var(--bg); }
.tng h4 { margin: 0 0 3px; font: 500 .72rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; }
.tng p { margin: 0; }
.tng .then h4 { color: var(--era-scent); } .tng .now h4 { color: var(--era-exchange); } .tng .gone h4 { color: var(--era-conquest); }
.optic { margin: 0; padding-left: 20px; } .optic li { margin-bottom: 4px; }
.meta { margin-top: 14px; padding: 10px 12px; border: 1px dashed var(--border-c); border-radius: 8px; font: .78rem/1.5 var(--f-mono); color: var(--ink-muted); overflow-wrap: anywhere; }
.meta .reveal { margin-top: 8px; }
.meta .found { margin-top: 8px; color: var(--ink); font-family: var(--f-body); font-size: .92rem; }
.ev-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.close { position: absolute; top: 10px; right: 10px; z-index: 2; width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); cursor: pointer; font-size: 1.2rem; line-height: 1; }
.credit { margin-top: 10px; font-size: .8rem; color: var(--ink-muted); }

@media (max-width: 860px) {
  body { font-size: 16px; }
  .app { display: flex; flex-direction: column; height: auto; min-height: 100%; }
  .topbar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; padding: 8px 16px; }
  .modes { margin-left: 0; width: 100%; } .modes button { flex: 1; }
  .map-wrap { order: 2; height: 44vh; position: sticky; top: var(--topbar-h, 110px); z-index: 4; border-bottom: 1px solid var(--line); background: var(--sea); }
  .panel { order: 3; overflow: visible; border-right: 0; position: relative; z-index: 1; }
  .stepnav { bottom: env(safe-area-inset-bottom, 0px); }
  .dial { bottom: 8px; padding: 8px 12px; } .dial p { font-size: .85rem; min-height: 0; }
  .ev-body { grid-template-columns: 1fr; }
  .ev-fig img { max-height: 46vh; }
  .ev-text { max-height: none; }
  .mapnote { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
.pin-wrap { width: 18px; height: 18px; }
.pin-wrap .pin-label { top: 9px; }
.ev-pin { width: 44px; height: 44px; padding: 0; border-radius: 50%; overflow: hidden; border: 2px solid var(--surface); box-shadow: 0 0 0 1.5px var(--ink), var(--shadow); cursor: pointer; background: var(--surface); transition: transform .2s; }
.ev-pin img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ev-pin:hover, .ev-pin:focus-visible, .ev-pin.hl { transform: scale(1.3); z-index: 3; }
.ev-pin.hl { box-shadow: 0 0 0 3px var(--highlight), var(--shadow); }

/* ---------- Opening page ---------- */
.cover { position: fixed; inset: 0; z-index: 20; overflow-y: auto; background: var(--bg); padding: calc(env(safe-area-inset-top, 0px) + 28px) 16px calc(env(safe-area-inset-bottom, 0px) + 28px); }
.cover-inner { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 48px; align-items: start; }
.cover-kicker { font: 500 .74rem/1.4 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--era-scent); margin: 18px 0 10px; }
.cover h1 { font: 400 clamp(2.6rem, 6vw, 4.6rem)/.95 var(--f-display); margin: 0 0 22px; text-wrap: balance; }
.cover-lede { font: italic 400 1.35rem/1.45 var(--f-display); margin: 0 0 16px; max-width: 34em; }
.cover-text > p { max-width: 62ch; }
.cover-how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 24px 0; }
.cover-how div { border-top: 2px solid var(--ink); padding-top: 8px; display: flex; flex-direction: column; gap: 4px; font-size: .95rem; }
.cover-how b { font: 400 1.25rem/1 var(--f-display); }
.cover-how span { color: var(--ink-muted); }
.cover-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn.big { padding: 12px 22px; font-size: 1.05rem; border-radius: 8px; }
.cover-fig { margin: 0 0 22px; }
.cover-fig img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 10px; display: block; }
.cover-fig figcaption { font: .72rem/1.4 var(--f-mono); color: var(--ink-muted); margin-top: 6px; }
.toc-title { font: 500 .74rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; margin: 0 0 8px; color: var(--ink-muted); }
.cover-toc { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.cover-toc button { width: 100%; display: grid; grid-template-columns: 44px minmax(0, 1fr); align-items: center; gap: 12px; text-align: left; background: var(--surface); border: 1px solid var(--line); border-left: 6px solid var(--era); border-radius: 0 8px 8px 0; padding: 8px 12px; cursor: pointer; }
.cover-toc button:hover { border-color: var(--era); }
.toc-num { font: 400 1.9rem/1 var(--f-display); color: var(--era); text-align: center; }
.toc-text { display: flex; flex-direction: column; }
.toc-text b { font: 400 1.2rem/1.2 var(--f-display); }
.toc-text small { font: .72rem/1.3 var(--f-mono); color: var(--ink-muted); letter-spacing: .06em; text-transform: uppercase; }
.btn.home { margin-left: 4px; }
body.cover-open { overflow: hidden; }

/* ---------- Chapters ---------- */
.storyhead { position: sticky; top: 0; z-index: 3; background: var(--bg); padding: 10px 16px 8px; border-bottom: 1px solid var(--line); }
.progress { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; }
.progress .seg { height: 18px; padding: 6px 0; border: 0; background: none; cursor: pointer; }
.progress .seg span { display: block; height: 6px; border-radius: 3px; background: var(--line); transition: background .3s; }
.progress .seg.done span { background: color-mix(in srgb, var(--era) 45%, var(--line)); }
.progress .seg.now span { background: var(--era); }
.nowcase { font: 500 .74rem/1.2 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--era); margin-top: 4px; min-height: 1.2em; }
.chapter { padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.chapter-card { margin: 0 0 18px; padding: 34px 24px 26px; background: var(--era); color: var(--on-era); min-height: 46vh; display: flex; flex-direction: column; justify-content: flex-end; scroll-margin-top: 70px; position: relative; overflow: hidden; }
.chapter-num { position: absolute; right: 18px; top: 4px; font: 400 9rem/1 var(--f-display); opacity: .22; }
.chapter-label { font: 500 .76rem/1 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; }
.chapter-card h2 { margin: 8px 0 12px; font: 400 2.4rem/1.02 var(--f-display); text-wrap: balance; }
.chapter-card .question { margin: 0; font: italic 400 1.2rem/1.4 var(--f-display); max-width: 30em; }
.chapter-meta { margin: 16px 0 0; font: .74rem/1 var(--f-mono); letter-spacing: .06em; text-transform: uppercase; opacity: .85; }
.chapter-card:focus-visible { outline-offset: -4px; }
.chapter .step { border-left: 4px solid var(--era); border-radius: 0 10px 10px 0; margin-bottom: 38vh; }
.chapter .step:last-child { margin-bottom: 16vh; }
.step:not(.active) { opacity: .72; }
.step.active { opacity: 1; }
.step-place { font: 500 .72rem/1 var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--era); margin-bottom: 6px; }
.story-end { padding-top: 24px; }

/* ---------- Spotlight ---------- */
.spot { position: relative; width: 0; height: 0; pointer-events: none; }
.spot-ring { position: absolute; left: -28px; top: -28px; width: 56px; height: 56px; border-radius: 50%; border: 2.5px solid var(--highlight); box-shadow: 0 0 0 3px color-mix(in srgb, var(--bg) 70%, transparent); animation: spotin .9s ease-out both, breathe 2.6s ease-in-out .9s infinite; }
.spot-label { position: absolute; left: 34px; top: -14px; white-space: nowrap; font: 400 1.15rem/1 var(--f-display); background: var(--surface); color: var(--ink); padding: 5px 9px; border: 1px solid var(--line); border-radius: 5px; box-shadow: var(--shadow); animation: fadein .6s ease-out .4s both; }
@keyframes spotin { from { transform: scale(2.4); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes breathe { 50% { transform: scale(1.12); } }
@keyframes fadein { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

@media (max-width: 860px) {
  .cover-inner { grid-template-columns: 1fr; gap: 24px; }
  .cover-how { grid-template-columns: 1fr; }
  .cover-fig img { aspect-ratio: 16 / 9; }
  .chapter-card { min-height: 34vh; padding: 26px 18px 20px; }
  .chapter-card h2 { font-size: 2rem; }
  .chapter-num { font-size: 6.5rem; }
  .chapter .step { margin-bottom: 22vh; }
  .storyhead { top: 0; }
  .btn.home { padding: 4px 9px; font-size: .85rem; }
}
@media (max-width: 860px) { .storyhead { position: relative; } .draft { display: none; } }