/* Layout concept: an Ordnance Survey sheet. Paper ground, ink text, one river-blue line that the
   home page draws from source to sea; stops sit on it like features on a map. */
:root {
  --paper: #f2f3ee;      /* OS sheet paper, slightly green-grey */
  --sheet: #fbfbf8;      /* raised panels */
  --ink: #1c2530;        /* map ink */
  --muted: #5b6672;      /* secondary text */
  --rule: #d5d9d3;       /* hairlines */
  --river: #2c6b9a;      /* OS water blue */
  --river-soft: #dde9f2;
  --antiquity: #9b3b2a;  /* OS antiquity lettering red */
  --flag-bg: #fbf1d9; --flag-ink: #6b4a06;
  --display: "Young Serif", Georgia, "Times New Roman", serif;
  --body: "Literata", Georgia, "Times New Roman", serif;
  --label: "IBM Plex Sans Condensed", "Arial Narrow", Arial, sans-serif;
  --measure: 66ch;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --paper: #12171c; --sheet: #192028; --ink: #e6e9e4; --muted: #a3adb6; --rule: #2c3540;
  --river: #78b4e2; --river-soft: #1d3346; --antiquity: #e08a74; --flag-bg: #3a2e12; --flag-ink: #f3d590; color-scheme: dark } }
:root[data-theme="dark"] {
  --paper: #12171c; --sheet: #192028; --ink: #e6e9e4; --muted: #a3adb6; --rule: #2c3540;
  --river: #78b4e2; --river-soft: #1d3346; --antiquity: #e08a74; --flag-bg: #3a2e12; --flag-ink: #f3d590; color-scheme: dark }

* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.65 var(--body); }
a { color: var(--river); text-underline-offset: .18em; }
a:focus-visible { outline: 2px solid var(--river); outline-offset: 3px; border-radius: 2px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.15; text-wrap: balance; margin: 0; }
p { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.kicker { font: 600 .78rem/1.3 var(--label); letter-spacing: .12em; text-transform: uppercase; color: var(--antiquity); }
.kicker span { color: var(--muted); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; background: var(--sheet); padding: 8px 12px; z-index: 20; }

/* header */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--paper); }
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--rule); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 12px; }
.brand { font: 400 1.35rem/1 var(--display); color: var(--ink); text-decoration: none; }
.brand span { color: var(--river); }
.top nav { display: flex; gap: 18px; flex-wrap: wrap; }
.top nav a { font: 500 .9rem/1 var(--label); letter-spacing: .04em; color: var(--muted); text-decoration: none; padding-block: 6px; border-bottom: 2px solid transparent; }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--river); }

/* home hero */
.hero-in { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: clamp(24px, 5vw, 64px); align-items: center; padding-block: clamp(32px, 6vw, 72px); }
.hero-text { display: grid; gap: 18px; min-width: 0; }
.hero h1 { font-size: clamp(2.3rem, 5.5vw, 4rem); }
.lede { max-width: var(--measure); color: var(--ink); }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }
.btn { font: 600 .95rem/1 var(--label); letter-spacing: .03em; padding: 12px 18px; border-radius: 3px; background: var(--river); color: var(--sheet); text-decoration: none; border: 1px solid var(--river); }
.btn.ghost { background: transparent; color: var(--river); }
.hero-fig img { border-radius: 2px; max-height: 460px; width: auto; margin-inline: auto; }
.hero-fig figcaption { text-align: center; }

/* section heads */
.sec-head { display: grid; gap: 8px; margin-bottom: 28px; }
.sec-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
.sec-head p:last-child { color: var(--muted); font-size: .95rem; }
.walk, .timeline { padding-block: clamp(36px, 6vw, 64px); border-top: 1px solid var(--rule); }

.walk-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 64px); align-items: start; }
.walk-maps { display: grid; gap: 22px; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 72px); min-width: 0; }
@media (max-width: 760px) { .walk-grid { grid-template-columns: minmax(0, 1fr); } .walk-maps { position: static; } }

/* the river line */
.line { list-style: none; margin: 0; padding: 0; display: grid; }
.line li { position: relative; padding-left: 64px; }
.line li::before { content: ""; position: absolute; left: 21px; top: 0; bottom: 0; border-left: 4px solid var(--river); }
.line li.under::before { border-left-style: dotted; }
.line li:first-child::before { top: 28px; }
.line li:last-child::before { bottom: calc(100% - 28px); }
.line a { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px; align-items: start; padding-block: 14px; color: inherit; text-decoration: none; }
.line .n { position: absolute; left: 6px; top: 12px; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--paper); border: 3px solid var(--river); font: 600 .8rem/1 var(--label); color: var(--river); font-variant-numeric: tabular-nums; }
.line a:hover .n, .line a:focus-visible .n { background: var(--river); color: var(--paper); }
.line .t { grid-column: 1 / -1; display: grid; gap: 2px; min-width: 0; }
.line strong { font: 400 1.25rem/1.25 var(--display); }
.line a:hover strong { color: var(--river); }
.line em { font: 500 .8rem/1.3 var(--label); letter-spacing: .06em; text-transform: uppercase; font-style: normal; color: var(--muted); }
.line .d { color: var(--muted); font-size: .98rem; }
.branch { justify-self: start; margin-top: 6px; font: 600 .78rem/1.2 var(--label); letter-spacing: .03em; padding: 4px 8px; border-radius: 3px; background: var(--river-soft); color: var(--river); }
.branch.in::before { content: "↘ "; } .branch.out::before { content: "↙ "; }

/* timeline */
.tl { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0; border-top: 2px solid var(--ink); }
.tl li { border-bottom: 1px solid var(--rule); }
.tl a { display: grid; gap: 6px; padding: 16px 16px 18px 0; color: inherit; text-decoration: none; height: 100%; }
.tl .when { font: 600 .78rem/1.2 var(--label); letter-spacing: .1em; text-transform: uppercase; color: var(--antiquity); font-variant-numeric: tabular-nums; }
.tl strong { font: 400 1.2rem/1.25 var(--display); }
.tl a:hover strong { color: var(--river); }
.tl span:last-child { color: var(--muted); font-size: .95rem; }
.tl.big { margin-top: 32px; }

/* article pages */
.page { padding-block: clamp(24px, 4vw, 48px) clamp(40px, 6vw, 72px); }
.page.narrow { max-width: 760px; }
.crumb { font: 500 .85rem/1 var(--label); margin-bottom: 18px; }
.crumb a::before { content: "← "; }
.page-head { display: grid; gap: 10px; margin-bottom: 32px; max-width: 46rem; }
.page-head h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
.dek { font-size: 1.15rem; color: var(--muted); }
.page-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .85fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.text { display: grid; gap: 28px; min-width: 0; }
.text section { display: grid; gap: 12px; max-width: var(--measure); }
.page section h2, .text h2 { font-size: 1.5rem; }
blockquote { margin: 4px 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--antiquity); font-style: italic; }
blockquote cite { display: block; margin-top: 6px; font: 500 .8rem/1.3 var(--label); font-style: normal; letter-spacing: .04em; color: var(--muted); }
.xlink { font: 600 .95rem/1.3 var(--label); }
.media { display: grid; gap: 22px; min-width: 0; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 72px); }
.fig { margin: 0; display: grid; gap: 8px; }
.fig img { border: 1px solid var(--rule); background: var(--sheet); }
figcaption { font: 500 .82rem/1.4 var(--label); color: var(--muted); letter-spacing: .02em; }
.flag { background: var(--flag-bg); color: var(--flag-ink); padding: 12px 14px; border-radius: 3px; font-size: .95rem; max-width: var(--measure); }
.flag strong { font: 600 .78rem/1 var(--label); letter-spacing: .1em; text-transform: uppercase; margin-right: 6px; }
.pn { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 48px; padding-top: 20px; border-top: 2px solid var(--ink); }
.pn a { display: grid; gap: 4px; font: 400 1.15rem/1.25 var(--display); color: var(--ink); text-decoration: none; }
.pn a span { font: 600 .75rem/1 var(--label); letter-spacing: .12em; text-transform: uppercase; color: var(--river); }
.pn .next { text-align: right; }
.pn a:hover { color: var(--river); }
.maps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.links { display: grid; gap: 10px; padding-left: 1.1em; margin: 0 0 32px; }
.links.plain { list-style: square; }
.page.narrow section { display: grid; gap: 12px; margin-bottom: 28px; }

/* footer */
.foot { border-top: 1px solid var(--rule); background: var(--sheet); }
.foot-in { padding-block: 28px; display: grid; gap: 6px; font-size: .88rem; color: var(--muted); }

@media (max-width: 760px) {
  .hero-in, .page-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-fig { order: -1; }
  .hero-fig img { max-height: 260px; }
  .media { position: static; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }
html { scroll-behavior: smooth; }
#walk { scroll-margin-top: 70px; }

/* watch and read, media page */
.watch { display: grid; gap: 10px; padding-top: 18px; border-top: 1px solid var(--rule); }
.watch h2 { font-size: 1.2rem; }
.watch ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; }
.page-grid.solo { grid-template-columns: minmax(0, 1fr); }
.media-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); border-top: 2px solid var(--ink); }
.media-list li { border-bottom: 1px solid var(--rule); }
.media-list a { display: grid; gap: 6px; padding: 18px 18px 20px 0; color: inherit; text-decoration: none; }
.mtype { font: 600 .75rem/1 var(--label); letter-spacing: .12em; text-transform: uppercase; color: var(--antiquity); }
.media-list strong { font: 400 1.2rem/1.25 var(--display); }
.media-list a:hover strong { color: var(--river); }
.media-list span:last-child { color: var(--muted); font-size: .95rem; }

/* map */
.map-shell { display: grid; grid-template-columns: minmax(0, 1fr) 200px; gap: 18px; align-items: start; }
#map { height: min(72vh, 640px); min-height: 380px; border: 1px solid var(--rule); background: var(--sheet); }
.legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font: 500 .85rem/1.3 var(--label); color: var(--muted); }
.legend li { display: flex; align-items: center; gap: 10px; }
.k { flex: none; display: inline-grid; place-items: center; }
.k-open { width: 26px; height: 0; border-top: 4px solid var(--river); }
.k-under { width: 26px; height: 0; border-top: 4px dotted var(--river); }
.k-abbey { width: 26px; height: 0; border-top: 8px solid rgba(201,138,27,.5); }
.k-overflow { width: 26px; height: 0; border-top: 4px dashed #3b8f6a; }
.k-water { width: 26px; height: 0; border-top: 3px dashed var(--antiquity); }
.k-stop, .pin-stop span { width: 24px; height: 24px; border-radius: 50%; background: var(--paper); border: 3px solid var(--river); color: var(--river); font: 600 .72rem/1 var(--label); }
.pin-stop span { display: grid; place-items: center; box-sizing: border-box; width: 28px; height: 28px; }
.pin-stop { background: none; border: 0; }
.k-mill, .pin-mill { width: 12px; height: 12px; background: var(--antiquity); border: 2px solid var(--paper); box-sizing: content-box; }
.k-works, .pin-works { width: 12px; height: 12px; background: #c98500; border: 2px solid var(--paper); border-radius: 50%; box-sizing: content-box; }
.k-gauge, .pin-gauge { width: 0; height: 0; border-left: 8px solid transparent; border-right: 8px solid transparent; border-bottom: 14px solid var(--river); background: none; }
.pop img { width: 100%; height: auto; margin-bottom: 8px; border: 1px solid var(--rule); }
.pop h3 { font: 400 1.05rem/1.2 var(--display); margin: 2px 0 4px; }
.pop p { margin: 0 0 6px; font: 400 .9rem/1.45 var(--body); }
.pop .pk { font: 600 .7rem/1.2 var(--label); letter-spacing: .1em; text-transform: uppercase; color: var(--antiquity); margin: 0; }
.leaflet-container { font: 400 .9rem/1.4 var(--body); }
.leaflet-popup-content-wrapper, .leaflet-popup-tip { background: var(--sheet); color: var(--ink); }
.leaflet-control-layers { background: var(--sheet); color: var(--ink); }
.note { font: 500 .82rem/1.45 var(--label); color: var(--muted); margin-top: 10px; }
.muted { color: var(--muted); }
@media (max-width: 760px) { .map-shell { grid-template-columns: minmax(0, 1fr); } .legend { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* live gauges */
.gauges { display: grid; gap: 22px; }
.gauge { border-top: 2px solid var(--ink); padding-top: 12px; display: grid; gap: 8px; }
.gauge header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.gauge h3 { font: 400 1.15rem/1.2 var(--display); }
.gauge .now { font: 500 .9rem/1.3 var(--label); color: var(--muted); font-variant-numeric: tabular-nums; }
.gauge .now strong { font: 400 1.4rem/1 var(--display); color: var(--river); }
.spark { width: 100%; height: 150px; display: block; background: var(--sheet); border: 1px solid var(--rule); }
.spark .l { fill: none; stroke: var(--river); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.spark .a { fill: var(--river-soft); stroke: none; }
.spark .e { fill: var(--river); stroke: var(--sheet); stroke-width: 2; }
.range { display: flex; justify-content: space-between; font: 500 .8rem/1 var(--label); color: var(--muted); font-variant-numeric: tabular-nums; }
.src { font: 600 .85rem/1.3 var(--label); }

/* lists inside chapters */
.mill-list { margin: 0; padding-left: 1.1em; display: grid; gap: 8px; }
.timeline-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--rule); }
.timeline-list li { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--rule); }
.timeline-list span { font: 600 .82rem/1.5 var(--label); color: var(--antiquity); letter-spacing: .04em; font-variant-numeric: tabular-nums; }

.mill-card { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .85fr); gap: clamp(20px, 4vw, 48px); padding: 32px 0; border-top: 1px solid var(--rule); scroll-margin-top: 80px; }
.mill-card:target h2 { color: var(--antiquity); }
.mill-text { display: grid; gap: 12px; align-content: start; max-width: var(--measure); }
.mill-figs { display: grid; gap: 16px; min-width: 0; }
.mill-flag { font: 500 .75rem/1 var(--label); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-left: 8px; }
@media (max-width: 760px) { .mill-card { grid-template-columns: 1fr; } }
.k-dig, .pin-dig { width: 11px; height: 11px; background: #6b4c9a; border: 2px solid var(--paper); transform: rotate(45deg); box-sizing: content-box; }
.fig-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 18px; margin: 6px 0; max-width: none; }
.fig-grid img { width: 100%; height: auto; }
.text section .fig-grid { max-width: 100%; }
.text section:has(.fig-grid) { max-width: none; }
.text section:has(.fig-grid) > :not(.fig-grid) { max-width: var(--measure); }

/* rotating quotations */
.quotes { padding-block: clamp(20px, 4vw, 44px) clamp(36px, 6vw, 72px); border-top: 1px solid var(--rule); }
.q-stage { position: relative; max-width: 46rem; margin-inline: auto; text-align: center; }
.q { margin: 0; display: grid; gap: 12px; }
.q blockquote { margin: 0; padding: 0; border: 0; font: italic 400 clamp(1.15rem, 2.6vw, 1.6rem)/1.45 var(--serif, "Literata", Georgia, serif); color: var(--ink); }
.q figcaption { font: 600 .8rem/1.4 var(--label); letter-spacing: .1em; text-transform: uppercase; color: var(--antiquity); }
.q-stage.js .q { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity 1.4s ease, visibility 0s linear 1.4s; align-content: start; }
.q-stage.js .q.on { opacity: 1; visibility: visible; transition: opacity 1.4s ease; }
.q-stage.calm .q, .q-stage.calm .q.on { transition: none; }

/* map layer tick boxes sit below the map */
.layers-below { margin-top: 12px; }
.layers-below .leaflet-control { float: none; clear: none; margin: 0; }
.layers-below .leaflet-control-layers { background: var(--sheet, #fff); border: 1px solid var(--rule); border-radius: 3px; box-shadow: none; color: var(--ink); padding: 10px 14px; font: 500 .9rem/1.4 var(--label); }
.layers-below .leaflet-control-layers-list { display: block; }
.layers-below .leaflet-control-layers-overlays { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.layers-below .leaflet-control-layers-overlays label { margin: 0; }
.layers-below .leaflet-control-layers-selector { margin-right: 6px; }
.map-shell #map { grid-column: 1; grid-row: 1; }
.map-shell .legend { grid-column: 2; grid-row: 1; }
.map-shell .layers-below { grid-column: 1 / -1; grid-row: 2; margin-top: 0; }
@media (max-width: 760px) { .map-shell #map, .map-shell .legend, .map-shell .layers-below { grid-column: 1; grid-row: auto; } .map-shell .layers-below { order: 2; } .map-shell .legend { order: 3; } }

/* planning map */
.plan-map { margin: 1rem 0 0.5rem; }
#planmap { height: 420px; border: 1px solid var(--rule, #d9d4c7); border-radius: 6px; }
.plan-tip { font: 600 0.78rem/1.2 inherit; background: #fffdf8; border: 1px solid #b9b3a3; box-shadow: none; padding: 2px 6px; }
@media (max-width: 640px) { #planmap { height: 340px; } }

/* contact form */
.contact p { margin: .8rem 0; }
.contact label { display: block; font-weight: 600; margin-bottom: .25rem; }
.contact input[type=text], .contact input[type=email], .contact textarea { width: 100%; box-sizing: border-box; padding: .6rem .7rem; font: inherit; color: inherit; background: var(--sheet, #fff); border: 1px solid var(--rule, #c9c3b3); border-radius: 3px; }
.contact button { font: inherit; font-weight: 600; padding: .6rem 1.2rem; border: 0; border-radius: 3px; background: var(--river, #2c6b9a); color: #fff; cursor: pointer; }

/* ---------------------------------------------------------------- shop */
.shop-sec { margin-bottom: clamp(32px, 5vw, 56px); }
.shop-sec .sec-head { margin-bottom: 20px; }
.btn.soon { background: transparent; color: var(--muted); border-color: var(--rule); cursor: default; }
.wb { list-style: none; margin: 0 0 20px; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); border-top: 2px solid var(--ink); }
.wb li { border-bottom: 1px solid var(--rule); padding: 18px 18px 20px 0; display: grid; gap: 8px; align-content: start; }
.wb h3 { font: 400 1.2rem/1.25 var(--display); margin: 0; }
.wb p { margin: 0; color: var(--muted); font-size: .95rem; }
.wb .lv { display: grid; gap: 2px; font: 500 .8rem/1.4 var(--label); letter-spacing: .02em; color: var(--ink); }
.wb .lv em { color: var(--muted); font-style: normal; }
.note { font-size: .95rem; color: var(--muted); max-width: var(--measure); }