/* ============================================================
   Kal Sze — Demo Floor
   World: convention-hall wayfinding. Concrete ivory ground,
   signage ink, safety-orange OPEN accent, teal secondary.
   Signage face: Overpass (highway-signage heritage), self-hosted.
   ============================================================ */

@font-face {
  font-family: "Overpass";
  font-style: normal;
  font-weight: 300 900;
  font-display: swap;
  src: url("assets/fonts/overpass-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Overpass";
  font-style: normal;
  font-weight: 300 900;
  font-display: swap;
  src: url("assets/fonts/overpass-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020,
    U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --concrete: #efebe3;
  --concrete-deep: #e4ddcd;
  --ink: #1b1c18;
  --ink-soft: #43453c;
  --orange: #e84e0f;
  --orange-deep: #b23a06;
  --teal: #0d5f56;
  --paper: #f7f4ec;
  --line: #b9b19d;
  --shadow: 0 2px 10px rgba(27, 28, 24, 0.14);
  --step: clamp(1rem, 0.96rem + 0.4vw, 1.1875rem);
}

/* ---- browser surfaces carry the world ---- */
::selection { background: var(--orange); color: var(--paper); }
:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}
html { scrollbar-color: var(--ink-soft) var(--concrete-deep); }

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .openbadge.flip,
  .openbadge.flip span,
  .plan .openbadge,
  .plan .openbadge rect,
  .plan .openbadge text { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--concrete);
  color: var(--ink);
  font-family: "Overpass", "Trebuchet MS", sans-serif;
  font-size: var(--step);
  line-height: 1.55;
  font-feature-settings: "tnum" 1;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  z-index: 10;
}
.skip:focus-visible { left: 0.5rem; top: 0.5rem; }

/* ---- overhead signage nav ---- */
.overhead {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow);
}
.hall-id {
  display: flex;
  align-items: center;
  padding: 0.7rem 1.2rem;
  color: var(--paper);
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0.22em;
  border-right: 1px solid rgba(247, 244, 236, 0.25);
}
.signs {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  overflow-x: auto;
}
.signs a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  color: var(--paper);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
  border-right: 1px solid rgba(247, 244, 236, 0.14);
}
.signs a:last-child { border-right: 0; }
.signs a:hover { background: var(--orange); color: var(--ink); }
.bay {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  padding: 0.1rem 0.45rem;
  border: 1.5px solid #f7f4ec;
  border-radius: 3px;
}

/* ---- lobby: directory + plan ---- */
.lobby {
  display: grid;
  grid-template-columns: minmax(320px, 5fr) 7fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vh, 5rem) clamp(1.2rem, 4vw, 3rem) clamp(2rem, 5vh, 4rem);
  min-height: calc(100vh - 3.2rem);
}
.directory h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 0 0 1.1rem;
}
.lede {
  max-width: 34rem;
  font-size: 1.15em;
  margin: 0 0 1.6rem;
}
.wayfind { margin: 0 0 1.4rem; }
.hallnote {
  color: var(--ink-soft);
  font-size: 0.9em;
}
.hallnote a { color: var(--teal); white-space: nowrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.25rem;
  border-radius: 4px;
  font-weight: 800;
  text-decoration: none;
  border: 2px solid var(--ink);
  transition: transform 120ms ease-out, box-shadow 120ms ease-out;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0); }
.btn-walk { background: var(--ink); color: var(--paper); }
.btn-live { background: var(--orange); color: var(--ink); }
.btn-live:hover { background: var(--orange-deep); color: var(--paper); }
.ico { width: 1.05em; height: 1.05em; }

/* ---- the floor plan ---- */
.plan { width: 100%; height: auto; display: block; }
.plan .hall { fill: var(--concrete-deep); stroke: var(--ink); stroke-width: 7; }
.plan .aisle { fill: var(--concrete); }
.plan .aisleline { stroke: var(--line); stroke-width: 3; stroke-dasharray: 10 8; }
.plan .booth rect {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 4;
  transition: fill 150ms ease-out;
}
.booth-link { cursor: pointer; outline-offset: -4px; }
.booth-link:hover .booth rect,
.booth-link:focus-visible .booth rect { fill: #ffefe2; }
.booth-no {
  font-weight: 900;
  font-size: 21px;
  letter-spacing: 0.12em;
  fill: var(--orange-deep);
}
.booth-name {
  font-weight: 800;
  font-size: 27px;
  text-anchor: middle;
  fill: var(--ink);
}
.booth-sub {
  font-size: 16px;
  font-weight: 500;
  text-anchor: middle;
  fill: var(--ink-soft);
}
.plan .fixture rect {
  fill: var(--paper);
  stroke: var(--ink-soft);
  stroke-width: 3;
}
.plan .fixture text,
.aislelabel {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  fill: var(--ink-soft);
}
.entrance .doorgap { fill: var(--concrete); }
.entrance .doorswing {
  fill: none;
  stroke: var(--line);
  stroke-width: 2.5;
  stroke-dasharray: 5 5;
}
.entrance .youare { fill: var(--orange); stroke: var(--ink); stroke-width: 2.5; }
.youare-t {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.18em;
  fill: var(--ink);
}
/* OPEN badges — one synchronized flip on load: every badge squashes to its
   hinge and back while the ink swaps at the midpoint. */
@keyframes badge-squash {
  0% { transform: scaleX(1); }
  50% { transform: scaleX(0.04); }
  100% { transform: scaleX(1); }
}
@keyframes badge-ground {
  0%, 46% { fill: var(--concrete); }
  54%, 100% { fill: var(--orange); }
}
@keyframes badge-label {
  0%, 46% { fill: var(--ink-soft); }
  54%, 100% { fill: var(--ink); }
}
@keyframes chip-skin {
  0%, 46% { background: var(--concrete-deep); color: var(--ink-soft); }
  54%, 100% { background: var(--orange); color: var(--ink); }
}
.openbadge rect { fill: var(--concrete); stroke: var(--ink); stroke-width: 2; }
.openbadge text {
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-anchor: middle;
  fill: var(--ink-soft);
}
.openbadge.flip {
  display: inline-block;
  background: var(--concrete-deep);
  color: var(--ink-soft);
  border: 2px solid var(--ink);
  border-radius: 4px;
  padding: 0.08rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
}
body.floor-open .plan .openbadge rect {
  animation: badge-ground 700ms linear both, badge-squash 700ms
    cubic-bezier(0.2, 0.7, 0.3, 1) both;
  transform-box: fill-box;
  transform-origin: center;
}
body.floor-open .plan .openbadge text { animation: badge-label 700ms linear both; }
body.floor-open .openbadge.flip {
  animation: badge-squash 700ms cubic-bezier(0.2, 0.7, 0.3, 1) both,
    chip-skin 700ms linear both;
}

/* booth headings carry their own wayfinding: bay number inline, OPEN chip
   riding the same line — no eyebrow label above the heading. */
.booth-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.hbay {
  color: #b23a06;
  border: 2px solid #b23a06;
  border-radius: 4px;
  font-size: clamp(0.75rem, 0.7rem + 0.3vw, 1.05rem);
  font-weight: 900;
  letter-spacing: 0.12em;
  padding: 0.12em 0.4em;
  margin-right: 0.7em;
  vertical-align: 0.18em;
  white-space: nowrap;
}

/* ---- booths (project sections) ---- */
.booth, .office {
  max-width: 980px;
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 8rem) clamp(1.2rem, 4vw, 3rem);
  scroll-margin-top: 4rem;
  outline: none;
}
.booth + .booth, .office {
  border-top: 3px dashed var(--line);
}
.booth h2, .office h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  margin: 0 0 1rem;
}
.pitch {
  max-width: 38rem;
  font-size: 1.12em;
  margin: 0 0 1.6rem;
}
.pitch em { font-style: normal; font-weight: 800; }
.evidence {
  margin: 0 0 1.6rem;
  border: 3px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--paper);
}
.evidence img { display: block; width: 100%; height: auto; }
.evidence figcaption {
  padding: 0.55rem 0.9rem;
  font-size: 0.85em;
  color: var(--ink-soft);
  border-top: 2px solid var(--concrete-deep);
}
.evidence figcaption a { color: var(--teal); }
.proves {
  max-width: 38rem;
  font-weight: 700;
  border-left: none;
  padding-left: 0;
  color: var(--ink);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  margin: 1.6rem 0 0;
}
.link-src {
  color: var(--teal);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.link-src:hover { color: var(--ink); }

/* ---- site office (about) ---- */
.office .pitch { max-width: 42rem; }

/* ---- hall close ---- */
.hallclose {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(2.5rem, 7vh, 4.5rem) clamp(1.2rem, 4vw, 3rem);
  text-align: center;
}
.closeline {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 0.8rem;
}
.closemeta { margin: 0; color: rgba(247, 244, 236, 0.75); font-size: 0.9em; }
.closemeta a { color: var(--paper); }

/* ---- responsive ---- */
@media (max-width: 900px) {
  .lobby {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 2rem;
  }
  .directory h1 br { display: none; }
}
@media (max-width: 640px) {
  .overhead { flex-direction: column; }
  .hall-id { border-right: 0; border-bottom: 1px solid rgba(247, 244, 236, 0.25); }
  .signs { flex-wrap: nowrap; scrollbar-width: none; }
  .signs::-webkit-scrollbar { display: none; }
  .signs a { border-right: 0; padding: 0.95rem 0.8rem; }
  .overhead::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    width: 64px;
    height: 47px;
    background: linear-gradient(90deg, rgba(27, 28, 24, 0), var(--ink) 82%);
    pointer-events: none;
  }
  .lobby { padding-bottom: 1rem; }
  .booth, .office { padding-top: 2.25rem; padding-bottom: 3.5rem; }
}
kbd {
  font-family: inherit;
  font-size: 0.85em;
  border: 1.5px solid #43453c;
  border-radius: 3px;
  padding: 0 0.3em;
}