/* Threshold 2027
   Layout concept: a specimen catalogue / instrument panel. Ink on cool paper,
   with the four hall colours used as a coding system (A medicine, B construction, C living, D automotive). */
:root {
  --bg: #ECEFED;
  --surface: #F6F8F7;
  --surface-2: #E0E6E3;
  --ink: #0D1411;
  --ink-2: #4A5650;
  --line: rgba(13, 20, 17, .16);
  --c-med: #E23D78;
  --c-con: #EBA400;
  --c-liv: #0B8E7F;
  --c-aut: #3558F5;
  --t-med: #C42A62;
  --t-con: #8A5A00;
  --t-liv: #0B7A6D;
  --t-aut: #2543D6;
  --on-med: #FFFFFF;
  --on-con: #0D1411;
  --on-liv: #FFFFFF;
  --on-aut: #FFFFFF;
  --bad: #B3261E;
  --font-d: 'Bricolage Grotesque', 'Arial Narrow', system-ui, sans-serif;
  --font-b: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-m: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  color-scheme: light;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0A0F0D;
    --surface: #121916;
    --surface-2: #1A2420;
    --ink: #E9EFEB;
    --ink-2: #97A69E;
    --line: rgba(233, 239, 235, .16);
    --c-med: #FF5C93;
    --c-con: #FFB81F;
    --c-liv: #2FD2BE;
    --c-aut: #7088FF;
    --t-med: #FF5C93;
    --t-con: #FFB81F;
    --t-liv: #2FD2BE;
    --t-aut: #7088FF;
    --on-med: #0A0F0D;
    --on-con: #0A0F0D;
    --on-liv: #0A0F0D;
    --on-aut: #0A0F0D;
    --bad: #FF8F85;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0A0F0D;
  --surface: #121916;
  --surface-2: #1A2420;
  --ink: #E9EFEB;
  --ink-2: #97A69E;
  --line: rgba(233, 239, 235, .16);
  --c-med: #FF5C93;
  --c-con: #FFB81F;
  --c-liv: #2FD2BE;
  --c-aut: #7088FF;
  --t-med: #FF5C93;
  --t-con: #FFB81F;
  --t-liv: #2FD2BE;
  --t-aut: #7088FF;
  --on-med: #0A0F0D;
  --on-con: #0A0F0D;
  --on-liv: #0A0F0D;
  --on-aut: #0A0F0D;
  --bad: #FF8F85;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--font-b);
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: env(safe-area-inset-top, 0px);
  z-index: 70;
  background: var(--bg);
}
img, svg, canvas { max-width: 100%; }
a { color: inherit; }
h1, h2, h3, p, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; }
::selection { background: var(--accent); color: var(--on-accent); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Hall colour coding. Defaults are the neutral (overview) look. */
.site {
  --accent: var(--ink);
  --accent-text: var(--ink);
  --on-accent: var(--bg);
  overflow-x: clip;
}
.t-med { --accent: var(--c-med); --accent-text: var(--t-med); --on-accent: var(--on-med); }
.t-con { --accent: var(--c-con); --accent-text: var(--t-con); --on-accent: var(--on-con); }
.t-liv { --accent: var(--c-liv); --accent-text: var(--t-liv); --on-accent: var(--on-liv); }
.t-aut { --accent: var(--c-aut); --accent-text: var(--t-aut); --on-accent: var(--on-aut); }

.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 60;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 800 1.05rem/1 var(--font-d); letter-spacing: .05em; }
.logo i { font-style: normal; color: var(--ink-2); margin-left: 2px; }
.logo svg { flex: none; }
.nav { margin-left: auto; }
.nav ul { display: flex; gap: 2px; }
.nav a {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px;
  text-decoration: none;
  font: 500 .92rem/1.2 var(--font-b);
  color: var(--ink-2);
  transition: color .2s, background .2s;
}
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--ink); }
.nav a[data-hall]::before { content: ""; width: 7px; height: 7px; background: var(--dot); flex: none; }
.progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 3px;
  transform-origin: left; transform: scaleX(0);
  background: var(--accent);
}
.t-home .progress { background: linear-gradient(90deg, var(--c-med) 0 25%, var(--c-con) 25% 50%, var(--c-liv) 50% 75%, var(--c-aut) 75% 100%); }
.menu-btn {
  display: none; width: 44px; height: 44px; padding: 0; margin-right: -8px;
  background: none; border: 0; cursor: pointer; position: relative;
}
.menu-btn span { position: absolute; left: 11px; right: 11px; height: 2px; background: var(--ink); transition: transform .3s, top .3s; }
.menu-btn span:nth-child(1) { top: 17px; }
.menu-btn span:nth-child(2) { top: 25px; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { top: 21px; transform: rotate(-45deg); }

/* ---------- Buttons, small parts ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .7em;
  padding: .95em 1.5em;
  font: 600 .95rem/1 var(--font-b);
  text-decoration: none; cursor: pointer;
  background: var(--accent); color: var(--on-accent);
  border: 1.5px solid var(--accent); border-radius: 2px;
  transition: transform .25s cubic-bezier(.2, .8, .2, 1), background .2s, color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn .arr { display: inline-block; transition: transform .25s; }
.btn:hover .arr { transform: translateX(4px); }
.btn.sm { padding: .7em 1.1em; font-size: .85rem; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--bg); }
.btn.inv { background: var(--on-accent); color: var(--accent); border-color: var(--on-accent); }
.eyebrow {
  display: flex; align-items: center; gap: 10px;
  font: 500 .75rem/1.3 var(--font-m);
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2);
}
.pip { display: inline-block; width: 8px; height: 8px; background: var(--accent); flex: none; animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; } }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 4px 8px; border: 1px solid var(--c, var(--ink)); border-radius: 2px;
  font: 500 .72rem/1.2 var(--font-m); letter-spacing: .06em; text-transform: uppercase; white-space: nowrap;
}
.chip::before { content: ""; width: 6px; height: 6px; background: var(--c, var(--ink)); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero .wrap { position: relative; padding-block: clamp(40px, 8vw, 104px) clamp(32px, 6vw, 72px); display: grid; gap: clamp(16px, 2.4vw, 28px); }
.hero.has-band .wrap { padding-bottom: clamp(150px, 24vw, 270px); }
.hero.short .wrap { padding-block: clamp(36px, 6vw, 72px); }
.display {
  font-family: var(--font-d);
  font-weight: 700;
  font-size: clamp(2.4rem, 10.5vw, 8.5rem);
  line-height: .92;
  letter-spacing: -.035em;
  text-transform: uppercase;
  font-optical-sizing: auto;
  overflow-wrap: anywhere;
}
.display.big { font-size: clamp(2.7rem, 12.5vw, 10rem); }
.display .ch { display: inline-block; }
.lead { font-size: clamp(1.08rem, 1.9vw, 1.3rem); line-height: 1.5; color: var(--ink-2); max-width: 58ch; }
.hero .lead { color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hud {
  position: absolute; z-index: 2;
  right: max(16px, env(safe-area-inset-right, 0px)); bottom: 16px;
  display: flex; align-items: center;
  padding: 9px 13px;
  background: var(--surface); border: 1px solid var(--line);
  font: 500 .78rem/1 var(--font-m); letter-spacing: .06em; text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}
.hud .pip { margin-right: 10px; }

.meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 0 28px; margin-top: clamp(8px, 2vw, 24px); }
.meta > div { border-top: 1.5px solid var(--ink); padding: 12px 0 8px; display: grid; gap: 4px; align-content: start; }
.meta dt { font: 500 .7rem/1.3 var(--font-m); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.meta dd { font: 600 1.2rem/1.25 var(--font-d); letter-spacing: -.01em; }
.meta dd small { display: block; font: 400 .9rem/1.4 var(--font-b); color: var(--ink-2); letter-spacing: 0; margin-top: 2px; }

/* ---------- Ticker ---------- */
.ticker { overflow: hidden; border-bottom: 1px solid var(--line); background: var(--surface); }
.ticker-track { display: flex; width: max-content; animation: tick 70s linear infinite; }
.ticker:hover .ticker-track { animation-play-state: paused; }
.ticker ul { display: flex; }
.ticker li { display: flex; align-items: center; gap: 12px; padding: 16px 28px; font: 600 1.1rem/1 var(--font-d); white-space: nowrap; }
.ticker li::before { content: ""; width: 9px; height: 9px; background: var(--dot); }
@keyframes tick { to { transform: translateX(-50%); } }

/* ---------- Sections ---------- */
.section { padding-block: clamp(56px, 9vw, 112px); border-bottom: 1px solid var(--line); }
.section.flush { border-bottom: 0; }
.section-head { display: grid; gap: 14px; margin-bottom: clamp(28px, 5vw, 56px); max-width: 64ch; }
h2 { font: 700 clamp(1.9rem, 4.6vw, 3.4rem)/1.02 var(--font-d); letter-spacing: -.025em; text-wrap: balance; }
h3 { font: 600 1.3rem/1.2 var(--font-d); letter-spacing: -.01em; }
.about { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(24px, 5vw, 72px); align-items: start; }
.about p + p { margin-top: 1em; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; margin-top: clamp(40px, 6vw, 72px); }
.stat { border-top: 1.5px solid var(--ink); padding-top: 14px; display: grid; gap: 6px; }
.stat .num { font: 700 clamp(2.2rem, 5vw, 3.8rem)/1 var(--font-d); letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.stat .lab { font: 500 .72rem/1.4 var(--font-m); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); }

/* ---------- Hall rows ---------- */
.halls { border-top: 1.5px solid var(--ink); }
.hall-row {
  position: relative; isolation: isolate; overflow: hidden;
  display: grid; grid-template-columns: 96px minmax(0, 1.1fr) minmax(0, 1.5fr) 44px;
  gap: 8px 28px; align-items: center;
  margin-inline: -12px; padding: clamp(20px, 3vw, 34px) 12px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: color .3s;
}
.hall-row::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .55s cubic-bezier(.2, .8, .2, 1);
}
.hall-row:hover, .hall-row:focus-visible { color: var(--on-accent); }
.hall-row:hover::before, .hall-row:focus-visible::before { transform: scaleX(1); }
.hall-id { font: 500 .78rem/1.3 var(--font-m); letter-spacing: .12em; text-transform: uppercase; }
.hall-name { font: 700 clamp(1.9rem, 4.8vw, 3.8rem)/1 var(--font-d); letter-spacing: -.03em; transition: transform .4s cubic-bezier(.2, .8, .2, 1); }
.hall-row:hover .hall-name { transform: translateX(10px); }
.hall-desc { display: grid; gap: 8px; font-size: .98rem; line-height: 1.5; color: var(--ink-2); transition: color .3s; }
.hall-desc span { font: 500 .74rem/1.4 var(--font-m); letter-spacing: .06em; text-transform: uppercase; }
.hall-row:hover .hall-desc, .hall-row:focus-visible .hall-desc { color: inherit; }
.hall-arrow { font: 400 1.9rem/1 var(--font-b); justify-self: end; transition: transform .3s; }
.hall-row:hover .hall-arrow { transform: translateX(6px); }

/* ---------- Floor plan ---------- */
.plan { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.fp-svg { width: 100%; height: auto; display: block; overflow: visible; }
.fp-hall { cursor: pointer; outline: none; }
.fp-fill { fill: var(--c); fill-opacity: .1; stroke: var(--c); stroke-width: 2; transition: fill-opacity .3s, stroke-width .3s; }
.fp-hall.is-on .fp-fill { fill-opacity: .3; stroke-width: 3; }
.fp-hall:focus-visible .fp-fill { stroke-width: 5; }
.fp-letter { font: 800 44px var(--font-d); fill: var(--ink); }
.fp-name { font: 600 21px var(--font-d); fill: var(--ink); }
.fp-stage { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-dasharray: 5 4; }
.fp-label { font: 500 14px var(--font-m); letter-spacing: .1em; fill: var(--ink-2); }
.fp-door { stroke: var(--ink); stroke-width: 5; }
.plan-panel { border-top: 3px solid var(--c, var(--ink)); padding-top: 18px; display: grid; gap: 14px; }
.plan-panel .letter { font: 800 4.5rem/.9 var(--font-d); color: var(--c, var(--ink)); }
.plan-panel h3 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 20px; font-size: .98rem; }
.kv dt { font: 500 .72rem/1.9 var(--font-m); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); }
.kv dd { font-variant-numeric: tabular-nums; }

/* ---------- Schedule ---------- */
.tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-bottom: 8px; }
.tab {
  text-align: left; padding: 14px 14px 13px; cursor: pointer;
  background: transparent; border: 0; border-top: 4px solid var(--c); color: var(--ink-2);
  display: grid; gap: 4px; transition: background .2s, color .2s;
}
.tab:hover { background: var(--surface-2); color: var(--ink); }
.tab[aria-selected="true"] { background: var(--surface); color: var(--ink); }
.tab-day { font: 500 .74rem/1.2 var(--font-m); letter-spacing: .1em; text-transform: uppercase; }
.tab-hall { font: 700 1.15rem/1.15 var(--font-d); letter-spacing: -.01em; }
.tabpanel { background: var(--surface); padding: 6px clamp(14px, 3vw, 28px); }
.event { display: grid; grid-template-columns: 90px minmax(0, 1fr) auto; gap: 6px 22px; padding: 18px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.event:last-child { border-bottom: 0; }
.ev-time { font: 500 .95rem/1.4 var(--font-m); font-variant-numeric: tabular-nums; }
.ev-main { display: grid; gap: 2px; min-width: 0; }
.ev-main strong { font: 600 1.12rem/1.3 var(--font-d); letter-spacing: -.005em; }
.ev-main span { color: var(--ink-2); font-size: .96rem; }

/* ---------- Visit info ---------- */
.info { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.info > div { border-top: 1.5px solid var(--ink); padding-top: 14px; display: grid; gap: 8px; align-content: start; }
.info h3 { font-size: 1.25rem; }
.info p { color: var(--ink-2); font-size: .98rem; }

/* ---------- CTA + footer ---------- */
.cta { background: var(--accent); color: var(--on-accent); }
.cta .wrap { padding-block: clamp(48px, 8vw, 96px); display: grid; gap: 24px; justify-items: start; }
.cta h2 { font-size: clamp(2.2rem, 7vw, 5.4rem); line-height: .95; max-width: 14ch; }
.cta p { max-width: 50ch; opacity: .85; }
.footer { padding-block: 40px 48px; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: 32px; }
.footer h3 { font: 500 .72rem/1.3 var(--font-m); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 10px; }
.footer li + li { margin-top: 6px; }
.footer a { text-decoration: none; font-size: .96rem; }
.footer a:hover { text-decoration: underline; text-underline-offset: 3px; }
.footer .brand { font: 700 1.5rem/1.1 var(--font-d); letter-spacing: -.02em; }
.footer .brand + p { color: var(--ink-2); margin-top: 8px; font-size: .96rem; max-width: 40ch; }

/* ---------- Hall pages ---------- */
.intro { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: clamp(24px, 5vw, 72px); align-items: start; }
.hall-letter {
  font: 800 clamp(11rem, 30vw, 26rem)/.78 var(--font-d);
  color: transparent; -webkit-text-stroke: 2px var(--accent); user-select: none;
  padding-top: .06em;
}
.intro .lead { margin-top: 18px; }
.themes { margin-top: clamp(28px, 4vw, 44px); display: grid; }
.themes li { border-top: 1px solid var(--line); padding: 18px 0; display: grid; gap: 6px; }
.themes li:last-child { border-bottom: 1px solid var(--line); }
.themes p { color: var(--ink-2); max-width: 54ch; }

.exhibit { position: relative; isolation: isolate; border-top: 1px solid var(--line); }
.exhibit:last-child { border-bottom: 1px solid var(--line); }
.exhibit::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(440px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%);
}
.exhibit:hover::after { opacity: 1; }
.exhibit-head {
  width: 100%; display: grid; grid-template-columns: 84px minmax(0, 1fr) 32px; gap: 20px; align-items: center;
  padding: 24px 0; background: none; border: 0; text-align: left; cursor: pointer;
}
.booth { font: 500 .85rem/1.3 var(--font-m); letter-spacing: .1em; color: var(--ink-2); transition: color .3s; }
.exhibit.open .booth { color: var(--accent-text); }
.ex-title { display: grid; gap: 4px; min-width: 0; }
.ex-name { font: 700 clamp(1.4rem, 3vw, 2.2rem)/1.1 var(--font-d); letter-spacing: -.02em; }
.ex-tag { color: var(--ink-2); font-size: .98rem; }
.ex-toggle { position: relative; width: 28px; height: 28px; border: 1.5px solid var(--ink); justify-self: end; }
.ex-toggle::before, .ex-toggle::after { content: ""; position: absolute; left: 6px; right: 6px; top: 50%; height: 1.5px; margin-top: -.75px; background: var(--ink); transition: transform .3s; }
.ex-toggle::after { transform: rotate(90deg); }
.exhibit.open .ex-toggle { background: var(--accent); border-color: var(--accent); }
.exhibit.open .ex-toggle::before, .exhibit.open .ex-toggle::after { background: var(--on-accent); }
.exhibit.open .ex-toggle::after { transform: rotate(0deg); }
.exhibit-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .45s cubic-bezier(.2, .8, .2, 1); }
.exhibit.open .exhibit-body { grid-template-rows: 1fr; }
.exhibit-inner { overflow: hidden; min-height: 0; padding-left: 104px; visibility: hidden; transition: visibility .45s; }
.exhibit.open .exhibit-inner { visibility: visible; }
.exhibit-inner > p { max-width: 62ch; }
.specs { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 20px; margin-top: 24px; padding-top: 18px; border-top: 1px dashed var(--line); }
.specs dt { font: 500 .7rem/1.4 var(--font-m); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); }
.specs dd { font: 600 1.6rem/1.15 var(--font-d); letter-spacing: -.02em; font-variant-numeric: tabular-nums; margin-top: 4px; }
.specs dd small { font: 500 .8rem/1 var(--font-m); letter-spacing: .02em; color: var(--ink-2); margin-left: 4px; }
.demo { margin-top: 20px; padding-bottom: 26px; display: flex; align-items: center; gap: 10px; font: 500 .8rem/1.4 var(--font-m); letter-spacing: .06em; text-transform: uppercase; }
.demo::before { content: ""; width: 8px; height: 8px; background: var(--accent); }

/* ---------- Registration ---------- */
.reg { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.form { display: grid; gap: 22px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field { display: grid; gap: 8px; min-width: 0; }
.field label, .legend { font: 500 .74rem/1.3 var(--font-m); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.field input {
  width: 100%; padding: 15px 14px; background: var(--surface); color: var(--ink);
  border: 1.5px solid var(--ink-2); border-radius: 2px; font-size: 1.05rem;
  transition: border-color .2s, box-shadow .2s;
}
.field input::placeholder { color: color-mix(in srgb, var(--ink-2) 70%, transparent); }
.field input:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ink) 14%, transparent); }
.field input[aria-invalid="true"] { border-color: var(--bad); }
.err { color: var(--bad); font-size: .9rem; min-height: 1.3em; margin-top: -2px; }
.err:empty { display: none; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; display: grid; gap: 10px; }
.legend { padding: 0; }
.seg { position: relative; display: grid; grid-template-columns: 1fr 1fr; border: 1.5px solid var(--ink); }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label {
  display: grid; gap: 3px; padding: 16px; cursor: pointer; text-transform: none; letter-spacing: 0;
  font: 600 1.1rem/1.2 var(--font-d); color: var(--ink);
  transition: background .25s, color .25s;
}
.seg label small { font: 400 .86rem/1.4 var(--font-b); opacity: .75; }
.seg label + input + label, .seg input + label + input + label { border-left: 1.5px solid var(--ink); }
.seg input:checked + label { background: var(--ink); color: var(--bg); }
.seg input:focus-visible + label { outline: 2px solid var(--ink); outline-offset: 3px; }
.perks { display: grid; gap: 8px; font-size: .98rem; color: var(--ink-2); }
.perks li { position: relative; padding-left: 22px; }
.perks li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 10px; height: 6px; border-left: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: rotate(-45deg) translateY(-2px); }
.perks[hidden] { display: none; }
.success { display: grid; gap: 18px; justify-items: start; padding: clamp(20px, 4vw, 36px); background: var(--surface); border-top: 4px solid var(--ink); }
.success h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.success:focus { outline: none; }

.ticket-stage { perspective: 1100px; position: sticky; top: calc(88px + env(safe-area-inset-top, 0px)); }
.ticket {
  position: relative; overflow: hidden; background: var(--surface); border: 1.5px solid var(--ink);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .18s ease-out;
}
.ticket::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(300px circle at var(--gx, 50%) var(--gy, 0%), color-mix(in srgb, var(--ink) 10%, transparent), transparent 70%);
}
.ticket-stripes { display: grid; grid-template-columns: repeat(4, 1fr); height: 12px; }
.ticket-stripes i:nth-child(1) { background: var(--c-med); }
.ticket-stripes i:nth-child(2) { background: var(--c-con); }
.ticket-stripes i:nth-child(3) { background: var(--c-liv); }
.ticket-stripes i:nth-child(4) { background: var(--c-aut); }
.ticket-body { padding: 24px 24px 20px; display: grid; gap: 28px; }
.ticket-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; font: 500 .74rem/1.3 var(--font-m); letter-spacing: .12em; text-transform: uppercase; }
.ticket-role { padding: 5px 10px; border: 1.5px solid var(--ink); transition: background .25s, color .25s; }
.ticket[data-role="participant"] .ticket-role { background: var(--ink); color: var(--bg); }
.ticket-name { font: 700 clamp(2.1rem, 5vw, 3.2rem)/.98 var(--font-d); letter-spacing: -.03em; text-transform: uppercase; overflow-wrap: anywhere; }
.ticket-name span { display: block; }
.ticket-name .ph { color: color-mix(in srgb, var(--ink-2) 55%, transparent); }
.ticket-info { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; font-size: .92rem; }
.ticket-info dt { font: 500 .66rem/1.4 var(--font-m); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.ticket-info dd { font-weight: 600; }
.perf { position: relative; border-top: 2px dashed var(--line); margin: 0 -24px; }
.perf::before, .perf::after { content: ""; position: absolute; top: -11px; width: 20px; height: 20px; border-radius: 50%; background: var(--bg); border: 1.5px solid var(--ink); }
.perf::before { left: -12px; }
.perf::after { right: -12px; }
.ticket-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 24px 22px; font: 500 .78rem/1.3 var(--font-m); letter-spacing: .08em; }
.ticket-foot svg { width: 56%; height: 40px; flex: none; }

/* ---------- Motion ---------- */
.js [data-reveal] { opacity: .15; transform: translateY(22px); transition: opacity .8s cubic-bezier(.2, .8, .2, 1), transform .8s cubic-bezier(.2, .8, .2, 1); transition-delay: var(--d, 0s); }
.js [data-reveal].in { opacity: 1; transform: none; }
.page-in { animation: pagein .6s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes pagein { from { opacity: 0; transform: translateY(10px); } }

@media (max-width: 980px) {
  .menu-btn { display: inline-flex; }
  .reg-btn { margin-left: auto; }
  .nav {
    position: absolute; left: 0; right: 0; top: 100%; margin: 0; display: none;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 6px max(16px, env(safe-area-inset-right, 0px)) 14px max(16px, env(safe-area-inset-left, 0px));
  }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav a { padding: 15px 0; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .nav a[aria-current="page"] { box-shadow: none; color: var(--ink); font-weight: 700; }
}
@media (max-width: 900px) {
  .about, .plan, .intro, .reg { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .info { grid-template-columns: minmax(0, 1fr); }
  .hall-letter { font-size: 9rem; line-height: .8; }
  .ticket-stage { position: static; }
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .hall-row { grid-template-columns: minmax(0, 1fr) 32px; }
  .hall-id, .hall-desc { grid-column: 1 / -1; }
  .hall-name { grid-column: 1; }
  .hall-arrow { grid-column: 2; grid-row: 2; }
  .event { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .event .chip { justify-self: start; margin-top: 6px; }
}
@media (max-width: 640px) {
  .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .exhibit-head { grid-template-columns: minmax(0, 1fr) 32px; gap: 8px 14px; padding: 20px 0; }
  .booth { grid-column: 1 / -1; }
  .exhibit-inner { padding-left: 0; }
  .row2 { grid-template-columns: minmax(0, 1fr); }
  .seg { grid-template-columns: minmax(0, 1fr); }
  .seg label + input + label, .seg input + label + input + label { border-left: 0; border-top: 1.5px solid var(--ink); }
  .hud { position: static; margin: 0 max(16px, env(safe-area-inset-left, 0px)) 16px; width: fit-content; }
  .hero.has-band .wrap { padding-bottom: 150px; }
  .foot-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .ticker { overflow-x: auto; }
}