/* Trailtrace. The page takes on the paper of the chosen edition:
   Klassik = white paper, grey contours, one red line. Alpinstart = night blue paper, everything in white.
   Two typefaces: Archivo (heavy, condensed) and Plex Mono. */

@font-face { font-family: "Archivo"; src: url(fonts/archivo-var.woff2) format("woff2"); font-weight: 100 900; font-stretch: 62% 125%; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url(fonts/plexmono-400.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Plex Mono"; src: url(fonts/plexmono-500.woff2) format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --fels: #16191c;
  --firn: #f3f2ee;
  --rot: #da291c;
  --nacht: #1c2a4a;
  --max: 1240px;
  --gutter: 32px;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --mono: "Plex Mono", ui-monospace, Menlo, monospace;
  --ease: cubic-bezier(.65, 0, .25, 1);

  /* Klassik */
  --bg: #ffffff;
  --bg-2: #f3f2ee;
  --ink: #16191c;
  --muted: #5d605f;
  --faint: #9a9c98;
  --line: #e4e2dc;
  --line-strong: #16191c;
  --accent: #da291c;
  --accent-hover: #b81f14;
  --on-accent: #ffffff;
  --route: #da291c;
  --route-w: .9px;
  --field: #ffffff;
  --error: #da291c;
  --deep: #16191c;
  --deep-2: #23282d;
  --deep-ink: #f3f2ee;
  --deep-muted: #c9ccce;
  --deep-faint: #9a9c98;
  --deep-line: #3a4046;
  --deep-accent: #da291c;
  --deep-on-accent: #ffffff;
  --shade: 255, 255, 255;
  --sheet-shadow: 0 1px 3px rgba(0,0,0,.1), 0 18px 40px -18px rgba(0,0,0,.3);
  --contours-deep: url(img/contours-eiger-dark.svg);
}

:root[data-edition="alpinstart"] {
  --bg: #1c2a4a;
  --bg-2: #22335a;
  --ink: #f4f5f8;
  --muted: #b9c2d6;
  --faint: #8592ad;
  --line: #34466e;
  --line-strong: #f4f5f8;
  --accent: #f4f5f8;
  --accent-hover: #ffffff;
  --on-accent: #1c2a4a;
  --route: #f7f7f4;
  --route-w: 1.8px;
  --field: #16223d;
  --error: #ff8a7d;
  --deep: #111b31;
  --deep-2: #1a2745;
  --deep-ink: #f4f5f8;
  --deep-muted: #b9c2d6;
  --deep-faint: #8592ad;
  --deep-line: #2b3b60;
  --deep-accent: #f4f5f8;
  --deep-on-accent: #1c2a4a;
  --shade: 28, 42, 74;
  --sheet-shadow: 0 2px 4px rgba(0,0,0,.35), 0 26px 50px -20px rgba(0,0,0,.75);
  --contours-deep: url(img/contours-eiger-night.svg);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 15px/1.65 var(--mono); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { margin: 0; }
p { margin: 0 0 14px; }
button { font: inherit; color: inherit; }

/* without View Transitions the colours glide instead */
.theme-anim, .theme-anim * { transition: background-color .7s var(--ease), color .7s var(--ease), border-color .7s var(--ease), fill .7s, stroke .7s !important; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.page { background: var(--bg); color: var(--ink); }
.page-2 { background: var(--bg-2); color: var(--ink); }
.deep {
  --ink: var(--deep-ink); --muted: var(--deep-muted); --faint: var(--deep-faint); --line: var(--deep-line);
  --line-strong: var(--deep-ink); --accent: var(--deep-accent); --on-accent: var(--deep-on-accent);
  background: var(--deep); color: var(--ink);
}

.display { font-family: var(--sans); font-stretch: 62%; font-weight: 800; text-transform: uppercase; line-height: .88; letter-spacing: 0; }
.mono { font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .08em; }
.muted { color: var(--muted); }
h2.display { font-size: clamp(40px, 5vw, 64px); margin-bottom: 28px; }

.label { font-family: var(--mono); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .1em; color: var(--faint); margin-bottom: 18px; display: flex; align-items: center; gap: 12px; }
.step-tag { display: inline-grid; place-items: center; min-width: 34px; height: 22px; padding: 0 6px; background: var(--accent); color: var(--on-accent); letter-spacing: .04em; }

/* buttons: rectangular, arrow, accent for the next step */
.btn { display: inline-flex; align-items: center; gap: 12px; padding: 17px 24px; border: 1.5px solid transparent; border-radius: 0;
  font: 500 13px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; text-decoration: none; cursor: pointer; transition: background .15s, color .15s, border-color .15s; }
.btn .arrow { width: 16px; height: 16px; transition: transform .15s; }
.btn:hover .arrow { transform: translateX(3px); }
.btn-accent { background: var(--accent); color: var(--on-accent); }
.btn-accent:hover { background: var(--accent-hover); }
.btn-ghost { border-color: currentColor; color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.deep .btn-ghost:hover { color: var(--deep); }
.btn-small { padding: 12px 16px; }
.btn-wide { width: 100%; justify-content: space-between; padding: 20px 24px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: default; }

/* edition switch: two swatches of paper */
.ed-switch { display: inline-flex; border: 1.5px solid var(--line-strong); }
.ed-switch button { display: inline-flex; align-items: center; gap: 10px; border: 0; background: transparent; cursor: pointer; padding: 10px 14px;
  font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.ready .ed-switch button { transition: background .2s, color .2s; }
.ed-switch button[aria-checked="true"] { background: var(--ink); color: var(--bg); }
.ed-switch button:focus-visible, .fmt-switch button:focus-visible, .room-tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sw { flex: none; width: 18px; height: 24px; border: 1px solid rgba(128,128,128,.5); position: relative; overflow: hidden; }
.sw::after { content: ""; position: absolute; left: -2px; right: -2px; top: 50%; height: 0; border-top: 2px solid; transform: rotate(-35deg); }
.sw-klassik { background: #fff; }
.sw-klassik::after { border-color: #da291c; border-top-width: 1.5px; }
.sw-alpinstart { background: #1c2a4a; }
.sw-alpinstart::after { border-color: #fff; border-top-width: 3px; }
.ed-switch-big button { padding: 14px 20px 14px 14px; gap: 14px; text-align: left; }
.ed-switch-big .sw { width: 30px; height: 42px; }
.ed-switch-big b { display: block; font: 800 22px/1 var(--sans); font-stretch: 62%; letter-spacing: .02em; }
.ed-switch-big em { display: block; font-style: normal; font-size: 10px; margin-top: 5px; opacity: .7; }

/* nav */
.nav { position: absolute; z-index: 10; top: 0; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center;
  padding: 22px var(--gutter); color: var(--ink); }
.nav nav { display: flex; align-items: center; gap: 26px; }
.nav nav > a:not(.btn) { font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: .1em; text-decoration: none; opacity: .8; }
.nav nav > a:not(.btn):hover { opacity: 1; }
.ed-switch-small button { padding: 7px 10px; }
.ed-switch-small span { display: none; }
.ed-switch-small .sw { width: 14px; height: 19px; }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-mark { height: 30px; width: auto; flex: none; }
.logo-word { font: 900 30px/1 var(--sans); font-stretch: 62%; letter-spacing: .02em; text-transform: uppercase; }
.logo-big .logo-mark { height: 40px; }
.logo-big .logo-word { font-size: 40px; }

/* hero: the page is the sheet */
.hero { position: relative; min-height: clamp(680px, 100svh, 1000px); display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; }
.hero-map { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-contours { transition: opacity .6s; }
.hero-contours-alpinstart { opacity: 0; }
[data-edition="alpinstart"] .hero-contours-klassik { opacity: 0; }
[data-edition="alpinstart"] .hero-contours-alpinstart { opacity: 1; }
.route-line { stroke: var(--route); stroke-width: var(--route-w); transition: stroke-width .8s var(--ease); }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(var(--shade),.95) 0%, rgba(var(--shade),.72) 40%, rgba(var(--shade),0) 75%),
  linear-gradient(0deg, rgba(var(--shade),.92) 0%, rgba(var(--shade),0) 30%); }
.hero-inner { position: relative; max-width: var(--max); width: 100%; margin: 0 auto; padding: 150px var(--gutter) 40px; }
.hero h1 { font-size: clamp(64px, 11vw, 150px); margin-bottom: 28px; }
.lead { font-size: 16px; line-height: 1.65; max-width: 34em; color: var(--muted); margin-bottom: 30px; }
.hero-pick { margin-bottom: 30px; }
.hero-pick-label { color: var(--faint); margin-bottom: 10px; }
.actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-data { position: relative; max-width: var(--max); width: 100%; margin: 0 auto; padding: 22px var(--gutter) 30px; display: grid;
  grid-template-columns: repeat(4, auto); justify-content: start; gap: 48px; border-top: 1px solid var(--line); }
.hero-data dt { color: var(--faint); margin-bottom: 4px; }
.hero-data dd { margin: 0; }
.draw path { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 3.2s cubic-bezier(.45,.05,.3,1) .4s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* swapped images fade while the other edition loads */
.swap { transition: opacity .35s; }
.swap.loading { opacity: .25; }

/* the sheet */
.sheet { padding: 128px 0; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.sheet-image { margin: 0; }
.sheet-image img { box-shadow: var(--sheet-shadow); }
.sheet-text > p { color: var(--muted); max-width: 32em; }
.specs { margin: 36px 0 0; border-top: 2px solid var(--line-strong); }
.specs div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.specs dt { padding-top: 4px; }
.specs dd { margin: 0; font-size: 14px; }

/* editions */
.editions { padding: 128px 0; }
.editions-intro { color: var(--muted); }
.editions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.edition { display: flex; flex-direction: column; position: relative; transition: opacity .4s, transform .5s var(--ease); }
.edition-img { background: var(--deep-2); padding: 28px; margin-bottom: 22px; outline: 2px solid transparent; outline-offset: 6px; transition: outline-color .3s; }
.edition-img img { width: 100%; box-shadow: 0 2px 4px rgba(0,0,0,.3), 0 24px 50px -24px rgba(0,0,0,.8); transition: transform .6s var(--ease); }
.edition:hover .edition-img img { transform: translateY(-4px) rotate(-.4deg); }
.edition-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding-bottom: 14px; border-bottom: 2px solid var(--ink); }
.edition h3 { font-size: 44px; }
.price { font-size: 18px; letter-spacing: .04em; margin: 0; }
.edition-specs { margin: 0 0 28px; flex: 1; }
.edition-specs div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.edition-specs dt { color: var(--faint); padding-top: 4px; }
.edition-specs dd { margin: 0; font-size: 14px; color: var(--muted); }
.editions-note { color: var(--faint); font-size: 13px; margin: 32px 0 0; }
.when-on { display: none; }
.edition.is-on .when-on { display: inline; }
.edition.is-on .when-off { display: none; }
.edition.is-on .edition-img { outline-color: var(--ink); }
.edition.is-on .btn-ghost { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.edition:not(.is-on) { opacity: .62; }
.edition:not(.is-on):hover { opacity: 1; }

/* format: one sheet that turns */
.format { padding: 128px 0; overflow: hidden; }
.format-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.format-text > p { color: var(--muted); max-width: 32em; }
.fmt-switch { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 34px 0 18px; max-width: 440px; }
.fmt-switch button { display: flex; align-items: center; gap: 16px; padding: 18px; text-align: left; cursor: pointer; background: transparent;
  border: 1.5px solid var(--line); }
.ready .fmt-switch button { transition: border-color .2s, background .2s, color .2s; }
.fmt-switch button:hover { border-color: var(--ink); }
.fmt-switch button[aria-checked="true"] { border-color: var(--ink); background: var(--ink); color: var(--bg); }
.fmt-switch b { display: block; font: 800 26px/1 var(--sans); font-stretch: 62%; text-transform: uppercase; }
.fmt-switch em { display: block; font: 500 11px var(--mono); font-style: normal; letter-spacing: .06em; margin-top: 6px; opacity: .7; }
.fmt-icon { flex: none; width: 34px; height: 34px; position: relative; }
.fmt-icon::before { content: ""; position: absolute; inset: 0; margin: auto; border: 2px solid currentColor; }
.fmt-icon-hoch::before { width: 24px; height: 34px; }
.fmt-icon-quer::before { width: 34px; height: 24px; }
.stage-caption { color: var(--faint); }
.when-quer { display: none; }
[data-format="quer"] .when-quer { display: inline; }
[data-format="quer"] .when-hoch { display: none; }

.stage { --h: min(560px, 82vw); --w: calc(var(--h) / 1.4142); position: relative; height: calc(var(--h) + 70px); }
.stage-sheet { position: absolute; left: 50%; top: calc(var(--h) / 2); width: var(--w); height: var(--h); background: var(--bg);
  transform: translate(-50%, -50%); box-shadow: var(--sheet-shadow); transition: transform 1.1s cubic-bezier(.7, -.25, .2, 1.25); }
[data-format="quer"] .stage-sheet { transform: translate(-50%, -50%) rotate(-90deg); }
.stage-sheet img { position: absolute; max-width: none; }
.stage-hoch { inset: 0; width: 100%; height: 100%; transition: opacity .45s .3s; }
.stage-quer { width: var(--h); height: var(--w); left: calc((var(--w) - var(--h)) / 2); top: calc((var(--h) - var(--w)) / 2);
  transform: rotate(90deg); opacity: 0; transition: opacity .45s .3s; }
[data-format="quer"] .stage-hoch { opacity: 0; }
[data-format="quer"] .stage-quer { opacity: 1; }
.stage.turning .stage-sheet { animation: lift 1.1s var(--ease); }
@keyframes lift { 50% { box-shadow: 0 4px 10px rgba(0,0,0,.18), 0 60px 80px -30px rgba(0,0,0,.45); } }
/* rulers follow the turned sheet */
.ruler { position: absolute; color: var(--faint); transition: all 1.1s cubic-bezier(.7, -.25, .2, 1.25); }
.ruler-x { left: 50%; top: calc(var(--h) / 2 + var(--h) / 2 + 22px); width: var(--w); transform: translateX(-50%); height: 10px; border: 1px solid currentColor; border-top: 0; }
.ruler-y { top: 0; left: calc(50% + var(--w) / 2 + 22px); height: var(--h); width: 10px; border: 1px solid currentColor; border-left: 0; }
[data-format="quer"] .ruler-x { width: var(--h); top: calc(var(--h) / 2 + var(--w) / 2 + 22px); }
[data-format="quer"] .ruler-y { height: var(--w); top: calc((var(--h) - var(--w)) / 2); left: calc(50% + var(--h) / 2 + 22px); }
.ruler span { position: absolute; white-space: nowrap; color: var(--ink); font-size: 11px; }
.ruler-x span { left: 50%; top: 16px; transform: translateX(-50%); }
.ruler-y span { left: 20px; top: 50%; transform: translateY(-50%); }
.ruler b { font-weight: 500; display: inline-block; min-width: 3ch; text-align: right; }

/* rooms */
.rooms { padding: 120px 0 96px; }
.room-stage { position: relative; aspect-ratio: 3 / 2; overflow: hidden; background: var(--line); }
.room { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .9s var(--ease); }
.room-front { animation: drift 16s ease-in-out infinite alternate; }
.room-back { opacity: 0; }
@keyframes drift { from { transform: scale(1.02); } to { transform: scale(1.07) translate(-1%, -1%); } }
.room-tag { position: absolute; left: 0; bottom: 0; margin: 0; display: flex; gap: 18px; padding: 12px 16px; background: var(--bg); color: var(--ink); }
.room-tag > span + span { color: var(--faint); }
.room-tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 2px; }
.room-tabs button { position: relative; text-align: left; padding: 18px 16px 16px; border: 0; background: transparent; cursor: pointer;
  font: 800 22px/1 var(--sans); font-stretch: 62%; text-transform: uppercase; border-top: 2px solid var(--line); color: var(--faint); transition: color .2s; }
.room-tabs button .mono { display: block; font-size: 11px; margin-bottom: 8px; }
.room-tabs button::before { content: ""; position: absolute; left: 0; top: -2px; height: 2px; width: 0; background: var(--accent); }
.room-tabs button[aria-selected="true"] { color: var(--ink); }
.room-tabs button[aria-selected="true"]::before { width: 100%; transition: width var(--room-ms, 6s) linear; }
.room-tabs.paused button[aria-selected="true"]::before { transition: none; width: 100%; }
.fine { color: var(--faint); margin-top: 28px; }

/* steps */
.steps { padding: 128px 0; background: linear-gradient(color-mix(in srgb, var(--deep) 82%, transparent), color-mix(in srgb, var(--deep) 82%, transparent)), var(--deep) var(--contours-deep) center/cover no-repeat; }
.signs { list-style: none; padding: 0; margin: 12px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.signs li { border-top: 2px solid var(--ink); padding-top: 16px; }
.step-no { color: var(--accent); }
.step-title { font: 800 26px/1 var(--sans); font-stretch: 62%; text-transform: uppercase; margin: 10px 0 4px; }
.step-meta { color: var(--faint); font-size: 11px; }
.signs p { color: var(--muted); font-size: 14px; margin-top: 12px; }

/* tours */
.routes { padding: 128px 0 96px; }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; margin-bottom: 40px; }
.section-head p { max-width: 32em; margin-bottom: 32px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px 32px; }
.card-img { aspect-ratio: 1; display: flex; align-items: center; justify-content: center; padding: 22px; margin-bottom: 14px; }
.card-img img { max-height: 100%; width: auto; box-shadow: var(--sheet-shadow); }
.card-quer .card-img img { width: 100%; height: auto; }
.card h3 { font-size: 30px; margin-bottom: 4px; }
.card-region { color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.card-region .mono { color: var(--ink); margin-left: 6px; }
.card-data { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; border-top: 1px solid var(--line); }
.card-data div { padding-top: 10px; }
.card-data dt { color: var(--faint); font-size: 10px; }
.card-data dd { margin: 2px 0 0; }

/* order */
.order { padding: 128px 0; }
.order .two { align-items: start; }
.order-text > p { color: var(--muted); max-width: 30em; }
.order-summary { display: flex; gap: 26px; align-items: center; margin-top: 36px; padding-top: 28px; border-top: 2px solid var(--line-strong); }
.mini-sheet { --mh: 92px; flex: none; width: var(--mh); height: var(--mh); position: relative; }
.mini-sheet i { position: absolute; left: 50%; top: 50%; width: calc(var(--mh) / 1.4142); height: var(--mh); transform: translate(-50%, -50%);
  background: #fff; box-shadow: var(--sheet-shadow); transition: transform .8s cubic-bezier(.7, -.25, .2, 1.25), background .5s; overflow: hidden; }
.mini-sheet i::after { content: ""; position: absolute; left: 12%; right: 12%; top: 46%; border-top: 1.5px solid #da291c; transform: rotate(-28deg); }
[data-format="quer"] .mini-sheet i { transform: translate(-50%, -50%) rotate(-90deg); }
[data-edition="alpinstart"] .mini-sheet i { background: #1c2a4a; outline: 1px solid var(--line); }
[data-edition="alpinstart"] .mini-sheet i::after { border-top: 3px solid #fff; }
.order-summary dl { display: grid; grid-template-columns: repeat(3, auto); gap: 8px 32px; margin: 0; }
.order-summary dt { color: var(--faint); font-size: 10px; }
.order-summary dd { margin: 4px 0 0; font-size: 14px; }

.form { background: var(--bg-2); padding: 36px; }
.drop { position: relative; border: 1.5px dashed var(--faint); background: var(--field); text-align: center; margin-bottom: 26px; transition: border-color .15s; }
.drop.over { border-color: var(--accent); }
.drop input { position: absolute; inset: 0; width: 100%; opacity: 0; cursor: pointer; }
.drop label { display: block; padding: 32px 20px 28px; }
.drop-icon { display: block; margin: 0 auto 10px; width: 32px; }
.drop strong { display: block; font: 700 22px var(--sans); font-stretch: 75%; text-transform: uppercase; margin-bottom: 6px; }
.drop label .mono { color: var(--muted); font-size: 11px; }
.file-name { margin: 0; padding: 0 20px 18px; }
.file-name::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-right: 8px; }
.activity { border: 0; padding: 0; margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.activity legend { padding: 0; margin-bottom: 10px; color: var(--muted); }
.activity label { position: relative; }
.activity input { position: absolute; opacity: 0; }
.activity span { display: inline-block; padding: 9px 14px; border: 1px solid var(--line); background: var(--field); font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; cursor: pointer; }
.activity input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.activity input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.edition-pick span em { font-style: normal; font-size: 11px; margin-left: 8px; opacity: .7; }
.frame-check { margin: -8px 0 22px; color: var(--ink); font-size: 15px; }
.field { display: block; margin-bottom: 18px; }
.field > span { display: block; color: var(--muted); margin-bottom: 6px; }
.field i { font-style: normal; color: var(--faint); margin-left: 6px; }
.field input, .field textarea { width: 100%; padding: 14px; font: 15px var(--mono); color: var(--ink); background: var(--field); border: 0; border-bottom: 2px solid var(--line); border-radius: 0; }
.field input::placeholder, .field textarea::placeholder { color: var(--faint); }
.field input:focus, .field textarea:focus { outline: 0; border-bottom-color: var(--ink); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.check { display: flex; gap: 12px; align-items: flex-start; color: var(--muted); font-size: 14px; margin: 6px 0 24px; }
.check input { margin-top: 4px; accent-color: var(--ink); }
.hp { position: absolute; left: -9999px; }
.form-status { margin: 16px 0 0; font-size: 15px; min-height: 1.4em; }
.form-status.error { color: var(--error); }

/* gpx help and faq */
.gpx { padding: 64px 0 96px; border-top: 1px solid var(--line); }
.apps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.apps h3 { font-size: 13px; padding-bottom: 10px; border-bottom: 2px solid var(--line-strong); margin-bottom: 14px; }
.apps p { color: var(--muted); font-size: 14px; }
.faq { padding: 64px 0 128px; border-top: 1px solid var(--line); }
.two-faq { display: grid; grid-template-columns: 1fr 1.6fr; gap: 80px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; padding: 22px 0;
  font: 500 14px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: none; width: 14px; height: 14px; margin-top: 3px;
  background: linear-gradient(var(--ink), var(--ink)) center/14px 2px no-repeat, linear-gradient(var(--ink), var(--ink)) center/2px 14px no-repeat; }
.faq details[open] summary::after { background: linear-gradient(var(--accent), var(--accent)) center/14px 2px no-repeat; }
.faq details p { color: var(--muted); max-width: 40em; padding-bottom: 12px; }

/* footer */
.foot { padding: 64px 0 40px; background: linear-gradient(color-mix(in srgb, var(--deep) 78%, transparent), color-mix(in srgb, var(--deep) 78%, transparent)), var(--deep) var(--contours-deep) center/cover no-repeat; }
.foot-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-bottom: 48px; border-bottom: 1px solid var(--line); }
.foot-bottom { display: flex; justify-content: space-between; gap: 40px; padding-top: 24px; }
.foot-bottom p { color: var(--faint); max-width: 60em; font-size: 11px; line-height: 1.7; margin: 0; }
.foot-bottom nav { display: flex; gap: 24px; }
.foot-bottom nav a { text-decoration: none; }

/* legal pages */
.legal-page .nav { position: static; background: var(--deep); color: var(--deep-ink); }
.legal { max-width: 760px; margin: 0 auto; padding: 72px var(--gutter) 96px; }
.legal h1 { font-size: clamp(48px, 7vw, 80px); margin-bottom: 36px; }
.legal h2 { font: 700 22px var(--sans); font-stretch: 75%; text-transform: uppercase; margin: 36px 0 10px; }
.legal p { color: var(--muted); }

/* View Transitions: the new paper spreads out from where you clicked */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 2; }

@media (max-width: 1100px) {
  .nav nav > a:not(.btn) { display: none; }
}
@media (max-width: 1000px) {
  .two, .section-head, .two-faq, .editions-grid, .format-grid { grid-template-columns: 1fr; gap: 48px; }
  .signs { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .apps { grid-template-columns: 1fr 1fr; }
  .sheet-image { max-width: 480px; }
  .hero-data { grid-template-columns: repeat(2, auto); gap: 18px 48px; }
  .stage { --h: min(520px, 74vw); }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  body { font-size: 14px; }
  .nav { padding: 16px var(--gutter); }
  .nav nav { gap: 10px; }
  .nav .btn-small { padding: 10px 12px; font-size: 11px; }
  .nav .btn-small .arrow { display: none; }
  .logo-mark { height: 24px; }
  .logo-word { font-size: 24px; }
  .nav .logo-word { display: none; }
  .hero-inner { padding-top: 110px; }
  .hero-data { grid-template-columns: 1fr 1fr; gap: 16px 20px; }
  .hero-data dd { overflow-wrap: anywhere; }
  .hero-shade { background: linear-gradient(0deg, rgba(var(--shade),.97) 30%, rgba(var(--shade),.6) 70%, rgba(var(--shade),.35) 100%); }
  .ed-switch-big { display: flex; width: 100%; }
  .ed-switch-big button { flex: 1; padding: 12px 10px; gap: 10px; }
  .ed-switch-big b { font-size: 19px; }
  .ed-switch-big .sw { width: 24px; height: 34px; }
  .sheet, .steps, .routes, .order, .editions, .format, .rooms { padding: 80px 0; }
  .edition-img { padding: 14px; }
  .edition h3 { font-size: 36px; }
  .stage { --h: 64vw; }
  .ruler-y span { left: 14px; writing-mode: vertical-rl; transform: translateY(-50%) rotate(180deg); }
  .room-stage { aspect-ratio: 4 / 3; }
  .room-tabs { grid-template-columns: 1fr 1fr; }
  .room-tag { flex-direction: column; gap: 2px; padding: 10px 12px; }
  .signs, .cards, .apps, .field-row { grid-template-columns: 1fr; }
  .order-summary dl { grid-template-columns: 1fr; gap: 6px; }
  .form { padding: 22px 16px; }
  .foot-top, .foot-bottom { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .draw path { animation: none; stroke-dashoffset: 0; }
  .room-front { animation: none; }
  html { scroll-behavior: auto; }
  .stage-sheet, .ruler, .mini-sheet i { transition-duration: .01s; }
}