/* Immersive additions: one continuous exhibit canvas, six distinct rooms. */
.immersive-page .immersive-addition {
  --addition-gap: clamp(24px, 4vw, 72px);
  position: relative;
  min-height: 860px;
  margin-block: 0;
  padding: clamp(100px, 12vw, 170px) clamp(32px, 8vw, 124px);
  overflow: visible;
  scroll-margin-top: 96px;
}

/* Keep the legacy entrance title on its authored two lines. */
.immersive-page .entrance h1 {
  text-wrap: nowrap;
  white-space: nowrap;
}

/* Give the entrance artwork more presence without crowding the authored title. */
@media (min-width: 901px) {
  .immersive-page .entrance__art {
    width: clamp(280px, 31vw, 446px);
    justify-self: end;
    transform: translateX(max(-60px, calc(99px - 11vw))) rotate(1.5deg);
  }
}

/* Align chapter 01 with its first exhibit card without moving the card wall. */
@media (min-width: 801px) {
  .immersive-page #features > .chapter-heading {
    top: clamp(176px, 14vw, 200px);
  }

  .immersive-page #story > .chapter-heading {
    top: 120px;
  }
}

.immersive-page .route-node {
  transform: translateX(-16px) rotate(-4deg);
}

.immersive-page .immersive-addition::before,
.immersive-page .immersive-addition::after {
  position: absolute;
  z-index: -1;
  content: "";
  pointer-events: none;
}

.immersive-page .immersive-addition__heading {
  max-width: 660px;
}

/* Keep every chapter number the same distance from its title. */
.immersive-page #features { --immersive-title-badge: "01"; }
.immersive-page #concept { --immersive-title-badge: "02"; }
.immersive-page #offering { --immersive-title-badge: "03"; }
.immersive-page #artists { --immersive-title-badge: "04"; }
.immersive-page #story { --immersive-title-badge: "05"; }
.immersive-page #sound { --immersive-title-badge: "06"; }
.immersive-page #backstage { --immersive-title-badge: "07"; }
.immersive-page #visit { --immersive-title-badge: "08"; }
.immersive-page #proof { --immersive-title-badge: "09"; }
.immersive-page #faq { --immersive-title-badge: "10"; }
.immersive-page #cta { --immersive-title-badge: "11"; }

.immersive-page :is(#features, #concept, #offering, #artists, #story, #sound, #backstage, #visit, #proof, #faq, #cta) > .route-node {
  display: none;
}

.immersive-page :is(
  #features .chapter-heading,
  #concept .immersive-addition__heading,
  #offering .chapter-heading,
  #artists .immersive-addition__heading,
  #story .chapter-heading,
  #sound .immersive-addition__heading,
  #backstage .immersive-addition__heading,
  #visit .immersive-addition__heading,
  #proof .proof-intro,
  #faq .immersive-addition__heading,
  #cta .exit-sign
) {
  position: relative;
  z-index: 4;
  clip-path: none;
}

.immersive-page :is(
  #features-title,
  #concept-title,
  #offering-title,
  #artists-title,
  #story-title,
  #sound-title,
  #backstage-title,
  #visit-title,
  #proof-title,
  #faq-title,
  #cta-title
) {
  position: relative;
  max-width: 100%;
  font-size: clamp(2.55rem, 3.3vw, 3.15rem);
  line-height: 1.02;
}

.immersive-page #cta-title {
  left: 46px;
  inline-size: fit-content;
  margin-inline: auto;
  text-align: left;
}

.immersive-page #cta .exit-sign::before {
  inset: -62px calc(100% - 8px) auto auto;
  width: 180px;
  height: 180px;
}

.immersive-page :is(
  #features-title,
  #concept-title,
  #offering-title,
  #artists-title,
  #story-title,
  #sound-title,
  #backstage-title,
  #visit-title,
  #proof-title,
  #faq-title,
  #cta-title
)::before {
  position: absolute;
  z-index: 3;
  top: 0;
  left: -92px;
  display: grid;
  width: 64px;
  aspect-ratio: 1;
  place-items: center;
  border: 4px solid var(--ink);
  background: var(--yellow);
  box-shadow: 7px 7px 0 var(--ink);
  color: var(--ink);
  content: var(--immersive-title-badge);
  font: 700 1.6rem Oswald, sans-serif;
  pointer-events: none;
  transform: rotate(-4deg);
}

.immersive-page .immersive-addition__heading h2 {
  max-width: 100%;
  margin-bottom: 28px;
  font-size: clamp(2.55rem, 3.3vw, 3.15rem);
  line-height: 1.02;
  text-wrap: balance;
  word-break: auto-phrase;
}

.immersive-page .immersive-addition__heading h2 > span {
  display: block;
  max-width: 100%;
  word-break: auto-phrase;
  white-space: nowrap;
}

.immersive-page .immersive-addition__heading > p:last-child {
  max-width: 540px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, .86);
  font-size: clamp(.8rem, 1.15vw, .98rem);
  line-height: 1.9;
}

.immersive-page .immersive-addition figure {
  min-width: 0;
  margin: 0;
}

.immersive-page .immersive-addition img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.immersive-page .immersive-addition figcaption {
  color: var(--ink);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .04em;
}

/* Concept: a deep gate and a single framed threshold. */
.immersive-page .immersive-concept {
  min-height: 920px;
  background: linear-gradient(105deg, var(--green) 0 44%, #004a25 44% 100%);
}

.immersive-page .immersive-concept::before {
  top: 12%;
  right: -10%;
  width: min(46vw, 610px);
  height: 74%;
  border: 3px solid rgba(255, 212, 50, .72);
  box-shadow: 22px 22px 0 rgba(0, 35, 209, .8), -18px -18px 0 rgba(255, 63, 172, .78);
  transform: skewY(-5deg) rotate(4deg);
}

.immersive-page .immersive-concept__gate {
  position: absolute;
  top: 10%;
  right: 4%;
  display: grid;
  width: min(23vw, 285px);
  height: 72%;
  border: 4px solid var(--ink);
  background: linear-gradient(90deg, rgba(0, 35, 209, .92), rgba(255, 63, 172, .72));
  box-shadow: 16px 16px 0 var(--yellow);
  transform: rotate(4deg);
  transform-origin: center;
}

.immersive-page .immersive-concept__gate span {
  align-self: center;
  justify-self: center;
  color: rgba(255, 255, 255, .82);
  font: 700 clamp(1.4rem, 3vw, 3rem)/1 Oswald, sans-serif;
  letter-spacing: .06em;
  writing-mode: vertical-rl;
}

.immersive-page .immersive-concept__gate i {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: rgba(255, 255, 255, .7);
  animation: immersive-gate-scan 3.8s ease-in-out infinite;
}

.immersive-page .immersive-concept__gate i:first-of-type { left: 29%; }
.immersive-page .immersive-concept__gate i:last-of-type { right: 27%; animation-delay: -1.9s; }

.immersive-page .immersive-concept .immersive-addition__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  align-items: center;
  gap: var(--addition-gap);
  min-height: 610px;
}

.immersive-page .immersive-concept__art {
  position: relative;
  z-index: 1;
  width: min(100%, 720px);
  justify-self: end;
  border: 5px solid var(--ink);
  background: var(--ink);
  box-shadow: 16px 16px 0 var(--pink);
  transform: rotate(-2deg);
}

.immersive-page .immersive-concept__art img { aspect-ratio: 16 / 10; }

.immersive-page .immersive-concept__art figcaption {
  position: absolute;
  right: -5px;
  bottom: -42px;
  padding: 9px 13px;
  border: 4px solid var(--ink);
  background: var(--paper);
}

.immersive-page .immersive-concept__note {
  position: absolute;
  z-index: 2;
  right: 8%;
  bottom: 8%;
  width: min(310px, 34%);
  border: 4px solid var(--ink);
  background: var(--yellow);
  box-shadow: 10px 10px 0 var(--ink);
  padding: 18px 22px;
  color: var(--ink);
  transform: rotate(-2deg);
}

.immersive-page .immersive-concept__note span { font-size: .66rem; font-weight: 700; }
.immersive-page .immersive-concept__note p { margin: 10px 0 0; font: 700 1.25rem/1.2 Oswald, sans-serif; }

/* Artists: asymmetrical hanging posters and profile labels. */
.immersive-page .immersive-artists {
  min-height: 980px;
  padding-top: clamp(110px, 13vw, 190px);
}

.immersive-page .immersive-artists::before {
  top: 0;
  right: 16%;
  width: 5px;
  height: 34%;
  background: var(--pink);
  box-shadow: 170px 0 0 var(--blue);
}

.immersive-page .immersive-artists__wall {
  position: relative;
  min-height: 550px;
  margin-top: 74px;
}

.immersive-page .immersive-artists__poster {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 12%;
  width: min(54%, 690px);
  border: 5px solid var(--ink);
  background: var(--paper);
  box-shadow: 16px 16px 0 var(--blue);
  color: var(--ink);
  transform: rotate(-2deg);
}

.immersive-page .immersive-artists__poster::before {
  position: absolute;
  top: -104px;
  left: 20%;
  width: 4px;
  height: 104px;
  background: var(--pink);
  content: "";
}

.immersive-page .immersive-artists__poster img { aspect-ratio: 16 / 10; }

.immersive-page .immersive-artists__poster figcaption {
  padding: 12px 16px;
  background: var(--paper);
}

.immersive-page .immersive-artists__profile {
  position: absolute;
  z-index: 3;
  width: min(330px, 35%);
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 11px 11px 0 var(--pink);
  padding: 24px;
  color: var(--ink);
  transition: transform .24s ease, box-shadow .24s ease;
}

.immersive-page .immersive-artists__profile span { font-size: .66rem; font-weight: 700; }
.immersive-page .immersive-artists__profile h3 { margin: 18px 0 10px; font-size: 2.2rem; line-height: 1; text-transform: uppercase; }
.immersive-page .immersive-artists__profile p { margin: 0; font-size: .8rem; line-height: 1.75; }
.immersive-page .immersive-artists__profile--one { top: 10%; right: 8%; transform: rotate(3deg); }
.immersive-page .immersive-artists__profile--two { right: 0; bottom: 0; box-shadow: 11px 11px 0 var(--yellow); transform: rotate(-3deg); }

/* Sound: the only circular room, with an animated audio ring and waveform. */
.immersive-page .immersive-sound {
  min-height: 960px;
  background: linear-gradient(180deg, var(--green), #004e27);
}

.immersive-page .immersive-sound::before {
  top: 16%;
  left: -10%;
  width: 35vw;
  height: 35vw;
  border: 2px solid rgba(255, 212, 50, .38);
  border-radius: 50%;
  box-shadow: 0 0 0 30px rgba(0, 35, 209, .18), 0 0 0 60px rgba(255, 63, 172, .12);
}

.immersive-page .immersive-sound__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  align-items: center;
  gap: clamp(30px, 7vw, 110px);
}

.immersive-page .immersive-sound__art {
  position: relative;
  border: 5px solid var(--ink);
  background: var(--ink);
  box-shadow: 16px 16px 0 var(--pink);
  transform: rotate(1.2deg);
}

.immersive-page .immersive-sound__art img { aspect-ratio: 16 / 10; }

.immersive-page .immersive-sound__art figcaption {
  position: absolute;
  right: -5px;
  bottom: -39px;
  padding: 8px 13px;
  border: 4px solid var(--ink);
  background: var(--yellow);
}

.immersive-page .immersive-sound__content { position: relative; min-width: 0; }

.immersive-page .immersive-sound__meter {
  position: relative;
  display: grid;
  width: min(100%, 360px);
  min-height: 290px;
  margin: 54px auto 0;
  place-items: center;
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 14px 14px 0 var(--blue);
  color: var(--ink);
  overflow: hidden;
}

.immersive-page .immersive-sound__meter-ring {
  position: absolute;
  width: 210px;
  aspect-ratio: 1;
  border: 5px solid var(--pink);
  border-radius: 50%;
  box-shadow: 0 0 0 15px var(--yellow), 0 0 0 20px var(--ink);
  animation: immersive-audio-ring 2.8s ease-in-out infinite;
}

.immersive-page .immersive-sound__meter-value {
  position: relative;
  z-index: 1;
  font: 700 3.5rem/1 Oswald, sans-serif;
}

.immersive-page .immersive-sound__wave {
  position: absolute;
  right: 20px;
  bottom: 38px;
  left: 20px;
  display: flex;
  height: 46px;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.immersive-page .immersive-sound__wave i {
  display: block;
  width: 5px;
  height: 22px;
  background: var(--blue);
  animation: immersive-wave 1.2s ease-in-out infinite alternate;
}

.immersive-page .immersive-sound__wave i:nth-child(2n) { height: 38px; background: var(--pink); animation-delay: -.28s; }
.immersive-page .immersive-sound__wave i:nth-child(3n) { height: 15px; background: var(--yellow); animation-delay: -.5s; }
.immersive-page .immersive-sound__meter small { position: absolute; bottom: 14px; font-size: .6rem; font-weight: 700; }

/* Backstage: horizontal control desk and cue sheet. */
.immersive-page .immersive-backstage {
  min-height: 980px;
  padding-top: clamp(110px, 13vw, 185px);
}

.immersive-page .immersive-backstage::before {
  top: 17%;
  left: 8%;
  width: 4px;
  height: 65%;
  background: var(--yellow);
  box-shadow: 430px 0 0 var(--pink), 860px 0 0 var(--blue);
  transform: rotate(10deg);
  opacity: .65;
}

.immersive-page .immersive-backstage__desk {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
  align-items: center;
  gap: var(--addition-gap);
  margin-top: 72px;
}

.immersive-page .immersive-backstage__art {
  position: relative;
  border: 5px solid var(--ink);
  background: var(--ink);
  box-shadow: 16px 16px 0 var(--yellow);
  transform: rotate(-1.5deg);
}

.immersive-page .immersive-backstage__art img { aspect-ratio: 16 / 10; }

.immersive-page .immersive-backstage__art figcaption {
  position: absolute;
  right: -5px;
  bottom: -40px;
  padding: 8px 13px;
  border: 4px solid var(--ink);
  background: var(--paper);
}

.immersive-page .immersive-backstage__cues {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 14px 14px 0 var(--pink);
  padding: 0;
  color: var(--ink);
  list-style: none;
}

.immersive-page .immersive-backstage__cues::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 24%;
  width: 2px;
  background: var(--blue);
  content: "";
  animation: immersive-cue-scan 4.2s ease-in-out infinite;
}

.immersive-page .immersive-backstage__cues li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 24px 22px;
  border-bottom: 3px solid var(--ink);
}

.immersive-page .immersive-backstage__cues li:last-child { border-bottom: 0; }
.immersive-page .immersive-backstage__cues li > span { grid-row: span 2; font-size: .68rem; font-weight: 700; }
.immersive-page .immersive-backstage__cues b { font-size: 1.45rem; line-height: 1; }
.immersive-page .immersive-backstage__cues small { font-size: .7rem; line-height: 1.55; }

/* Visit: folded route map with a flat admission ticket. */
.immersive-page .immersive-visit {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr);
  align-items: center;
  gap: var(--addition-gap);
  min-height: 920px;
  background: linear-gradient(125deg, #00592b 0 62%, #004a25 62% 100%);
}

.immersive-page .immersive-visit::before {
  top: 12%;
  right: 4%;
  width: 26%;
  height: 70%;
  border: 4px solid var(--blue);
  transform: rotate(8deg);
}

.immersive-page .immersive-visit__map {
  position: relative;
  min-height: 520px;
  border: 5px solid var(--ink);
  background: #f4ecd4;
  box-shadow: 16px 16px 0 var(--pink);
  padding: 35px;
  transform: rotate(-2deg);
}

.immersive-page .immersive-visit__map figure {
  position: relative;
  z-index: 1;
  width: 78%;
  margin: 0 auto;
  border: 4px solid var(--ink);
  background: var(--ink);
  transform: rotate(3deg);
}

.immersive-page .immersive-visit__map img { aspect-ratio: 16 / 10; }

.immersive-page .immersive-visit__map figcaption {
  position: absolute;
  right: -4px;
  bottom: -38px;
  padding: 8px 11px;
  border: 3px solid var(--ink);
  background: var(--yellow);
}

.immersive-page .immersive-visit__route {
  position: absolute;
  z-index: 2;
  inset: 14% 13% 15%;
  border: 4px dashed var(--pink);
  border-radius: 48% 37% 52% 41%;
  transform: rotate(-12deg);
}

.immersive-page .immersive-visit__route i {
  position: absolute;
  width: 19px;
  aspect-ratio: 1;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
}

.immersive-page .immersive-visit__route i:nth-child(1) { top: 3%; left: 8%; }
.immersive-page .immersive-visit__route i:nth-child(2) { top: 38%; right: 10%; background: var(--blue); }
.immersive-page .immersive-visit__route i:nth-child(3) { bottom: 8%; left: 34%; background: var(--pink); }
.immersive-page .immersive-visit__route i:nth-child(4) { top: 46%; left: 42%; background: var(--green); }

.immersive-page .immersive-visit__pin {
  position: absolute;
  z-index: 3;
  padding: 6px 10px;
  border: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-size: .64rem;
  font-weight: 700;
  transform: rotate(-4deg);
}

.immersive-page .immersive-visit__pin--start { top: 8%; left: 6%; }
.immersive-page .immersive-visit__pin--mid { top: 45%; right: 4%; background: var(--yellow); }
.immersive-page .immersive-visit__pin--end { bottom: 8%; left: 25%; background: var(--pink); }

.immersive-page .immersive-visit__ticket {
  position: relative;
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 14px 14px 0 var(--yellow);
  padding: 32px;
  color: var(--ink);
  transform: rotate(2deg);
  transition: transform .24s ease, box-shadow .24s ease;
}

.immersive-page .immersive-visit__ticket::after {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 36px;
  aspect-ratio: 1;
  border: 4px solid var(--ink);
  background: var(--pink);
  content: "";
  transform: rotate(12deg);
}

.immersive-page .immersive-visit__ticket > span { font-size: .66rem; font-weight: 700; }
.immersive-page .immersive-visit__ticket strong { display: block; margin: 22px 0 30px; font: 700 clamp(2.3rem, 4vw, 4.3rem)/.95 Oswald, sans-serif; }
.immersive-page .immersive-visit__ticket dl { margin: 0; border-top: 3px solid var(--ink); }
.immersive-page .immersive-visit__ticket dl div { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 2px solid var(--ink); }
.immersive-page .immersive-visit__ticket dt { font-size: .65rem; font-weight: 700; }
.immersive-page .immersive-visit__ticket dd { margin: 0; font-size: .74rem; text-align: right; }

/* Proof: a live field image paired with a horizontal measurement console. */
.immersive-page #proof.chapter-proof {
  grid-template-areas:
    "intro visual"
    "metrics metrics";
  grid-template-columns: minmax(260px, .68fr) minmax(0, 1.32fr);
  gap: clamp(54px, 6.5vw, 92px);
  min-height: 1080px;
  padding-block: clamp(130px, 13vw, 180px);
}

.immersive-page #proof .proof-intro {
  grid-area: intro;
  align-self: center;
}

.immersive-page .immersive-proof__visual {
  position: relative;
  grid-area: visual;
  align-self: center;
  min-width: 0;
  margin: 0;
  border: 5px solid var(--ink);
  background: var(--ink);
  box-shadow: 16px 16px 0 var(--pink);
  overflow: hidden;
  isolation: isolate;
  transform: rotate(-1deg);
}

.immersive-page .immersive-proof__visual img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transform-origin: center;
}

.immersive-page .immersive-proof__visual.is-visible img {
  animation: immersive-proof-drift 11s ease-in-out infinite alternate;
}

.immersive-page .immersive-proof__visual::before {
  position: absolute;
  z-index: 2;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, transparent 0 calc(25% - 1px), rgba(255, 214, 61, .28) calc(25% - 1px) 25%),
    repeating-linear-gradient(0deg, transparent 0 calc(33.333% - 1px), rgba(255, 255, 255, .16) calc(33.333% - 1px) 33.333%);
  content: "";
  pointer-events: none;
}

.immersive-page .immersive-proof__visual::after {
  position: absolute;
  z-index: 3;
  top: 12%;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--yellow);
  box-shadow: 0 0 18px rgba(255, 214, 61, .9);
  content: "";
  pointer-events: none;
  animation: immersive-proof-scan 4.8s ease-in-out infinite;
}

.immersive-page .immersive-proof__visual figcaption {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 0;
  display: grid;
  max-width: min(440px, 78%);
  gap: 7px;
  border-top: 4px solid var(--ink);
  border-left: 4px solid var(--ink);
  background: var(--yellow);
  padding: 13px 16px;
  color: var(--ink);
}

.immersive-page .immersive-proof__visual figcaption span { font-size: .62rem; font-weight: 700; }
.immersive-page .immersive-proof__visual figcaption strong { font: 700 clamp(1.05rem, 1.7vw, 1.55rem)/1.15 Oswald, sans-serif; }

.immersive-page #proof .measurement-strip {
  grid-area: metrics;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  transform: rotate(.45deg);
}

.immersive-page #proof .measurement-strip div {
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 10px;
  border-right: 4px solid var(--ink);
  border-bottom: 0;
}

.immersive-page #proof .measurement-strip :is(dt, dd) { width: 100%; }

.immersive-page #proof .measurement-strip div:last-child { border-right: 0; }

/* FAQ: a console-like white control surface. */
.immersive-page .immersive-faq {
  min-height: 980px;
  padding-block: clamp(110px, 13vw, 180px);
}

.immersive-page .immersive-faq::before {
  top: 16%;
  right: 4%;
  width: 190px;
  height: 190px;
  border: 4px solid var(--pink);
  background: var(--blue);
  box-shadow: 17px 17px 0 var(--yellow);
  transform: rotate(11deg);
}

.immersive-page .immersive-faq__panel {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: clamp(32px, 7vw, 110px);
  align-items: start;
}

.immersive-page .immersive-faq__list {
  display: grid;
  border: 4px solid var(--ink);
  background: var(--paper);
  box-shadow: 15px 15px 0 var(--blue);
  color: var(--ink);
}

.immersive-page .immersive-faq__list details { border-bottom: 3px solid var(--ink); }
.immersive-page .immersive-faq__list details:last-child { border-bottom: 0; }

.immersive-page .immersive-faq__list summary {
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  min-height: 72px;
  gap: 16px;
  padding: 13px 18px;
  cursor: pointer;
  font: 700 1.06rem/1.3 Oswald, sans-serif;
  list-style: none;
}

.immersive-page .immersive-faq__list summary::-webkit-details-marker { display: none; }
.immersive-page .immersive-faq__list summary::after { justify-self: end; color: var(--pink); content: "+"; font: 700 1.8rem/1 Oswald, sans-serif; transition: transform .2s ease; }
.immersive-page .immersive-faq__list details[open] summary::after { transform: rotate(45deg); }
.immersive-page .immersive-faq__list summary > span { color: var(--blue); font: 700 .72rem/1 "JetBrains Mono", monospace; }
.immersive-page .immersive-faq__list details p { max-width: 620px; margin: 0; border-top: 2px solid var(--ink); padding: 16px 58px 20px 90px; font-size: .76rem; line-height: 1.75; }

/* Exhibition navigation: desktop fixed route and mobile full-screen route. */
.immersive-page .template-nav {
  position: fixed;
  z-index: 40;
  top: 6px;
  right: 0;
  left: 0;
  transition: background-color .24s ease, backdrop-filter .24s ease, box-shadow .24s ease;
}

.immersive-page .template-nav.is-scrolled {
  background: rgba(0, 89, 43, .92);
  box-shadow: 0 4px 0 rgba(11, 13, 11, .35);
  backdrop-filter: blur(10px);
}

.immersive-page .template-nav__inner { width: min(calc(100% - 48px), 1360px); }
.immersive-page .template-nav__links { display: flex; flex: 0 1 auto; align-items: center; justify-content: flex-end; gap: clamp(12px, 1.7vw, 26px); }
.immersive-page .immersive-nav-dialog__header,
.immersive-page .immersive-nav-backdrop { display: none; }
.immersive-page .immersive-nav-dialog__links { display: flex; align-items: center; gap: inherit; }
.immersive-page .immersive-nav-dialog__links a { position: relative; white-space: nowrap; }
.immersive-page .immersive-nav-dialog__links a::after { position: absolute; right: 0; bottom: 5px; left: 0; height: 2px; background: var(--yellow); content: ""; transform: scaleX(0); transform-origin: right; transition: transform .2s ease; }
.immersive-page .immersive-nav-dialog__links a:hover::after,
.immersive-page .immersive-nav-dialog__links a.is-active::after { transform: scaleX(1); transform-origin: left; }
.immersive-page .immersive-nav-dialog__links a.is-active { color: var(--yellow); }
.immersive-page .immersive-nav-toggle { display: none; }
.immersive-page .immersive-nav-toggle[aria-expanded="true"] { visibility: hidden; pointer-events: none; }

/* New reveal states remain safe if site.js is unavailable: base.css handles the initial state. */
.immersive-page .immersive-addition [data-reveal="mask"] { clip-path: inset(0 0 100% 0); }
.immersive-page .immersive-addition [data-reveal="scale"] { transform: scale(.94); }
.immersive-page .immersive-addition [data-reveal].is-visible { clip-path: inset(0); opacity: 1; transform: none; }
.immersive-page .immersive-addition [data-reveal="up"].is-visible { transform: translateY(0); }

@keyframes immersive-gate-scan { 0%, 100% { opacity: .25; transform: translateX(0); } 50% { opacity: 1; transform: translateX(18px); } }
@keyframes immersive-audio-ring { 0%, 100% { transform: scale(.92); opacity: .72; } 50% { transform: scale(1.06); opacity: 1; } }
@keyframes immersive-wave { from { transform: scaleY(.52); } to { transform: scaleY(1.18); } }
@keyframes immersive-cue-scan { 0%, 100% { transform: translateY(-6%); opacity: .25; } 50% { transform: translateY(106%); opacity: 1; } }
@keyframes immersive-proof-drift { from { transform: scale(1); } to { transform: scale(1.045); } }
@keyframes immersive-proof-scan { 0%, 100% { top: 12%; opacity: .45; } 50% { top: 84%; opacity: 1; } }

@media (min-width: 801px) {
  .immersive-page .chapter-features .label-wall {
    margin-top: clamp(56px, 4vw, 72px);
  }

  .immersive-page .chapter-offering .offering-map {
    grid-template-areas:
      "heading route"
      "note route";
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(64px, 5vw, 80px);
    row-gap: 48px;
  }

  .immersive-page .chapter-offering .chapter-heading { grid-area: heading; }
  .immersive-page .chapter-offering .route-stops { grid-area: route; }
  .immersive-page .chapter-offering .curator-note {
    position: relative;
    inset: auto;
    grid-area: note;
    width: min(380px, 100%);
    margin: 0;
    align-self: start;
    justify-self: start;
  }
}

@media (min-width: 901px) and (max-width: 1180px) {
  .immersive-page .template-nav__inner { width: min(calc(100% - 32px), 1120px); }
  .immersive-page .template-nav__links { gap: 10px; }
  .immersive-page .template-nav a { font-size: .66rem; }
  .immersive-page .immersive-nav-dialog__links { gap: 10px; }
  .immersive-page .immersive-addition { padding-inline: 7vw; }
  .immersive-page :is(
    #features-title,
    #concept-title,
    #offering-title,
    #artists-title,
    #story-title,
    #sound-title,
    #backstage-title,
    #visit-title,
    #proof-title,
    #faq-title,
    #cta-title
  ) { font-size: clamp(2rem, 3.45vw, 2.55rem); }
}

@media (max-width: 900px) {
  .immersive-page .template-nav__inner { width: min(calc(100% - 28px), 640px); min-height: 64px; }
  .immersive-page .template-nav__links {
    position: fixed;
    z-index: 1;
    inset: 0;
    display: none;
    width: 100%;
    height: 100svh;
    margin: 0;
    padding: 78px 22px 30px;
    background: var(--green);
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
    justify-content: stretch;
    justify-items: stretch;
  }
  .immersive-page .template-nav__links[aria-hidden="false"] { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto 1fr; }
  .immersive-page .immersive-nav-dialog__header,
  .immersive-page .immersive-nav-dialog__links { position: relative; z-index: 2; }
  .immersive-page .immersive-nav-dialog__header { display: flex; align-items: center; justify-content: space-between; min-height: 44px; }
  .immersive-page .immersive-nav-dialog__header p { margin: 0; color: var(--yellow); font-size: .68rem; font-weight: 700; }
  .immersive-page .immersive-nav-close { display: inline-grid; width: 44px; min-width: 44px; height: 44px; min-height: 44px; place-items: center; border: 3px solid var(--ink); background: var(--paper); color: var(--ink); cursor: pointer; font: 700 1.5rem/1 Oswald, sans-serif; }
  .immersive-page .immersive-nav-dialog__links { display: grid; width: 100%; min-width: 0; grid-template-columns: minmax(0, 1fr); align-content: start; align-items: stretch; justify-content: stretch; justify-items: stretch; gap: 4px; padding-top: 26px; overflow-y: auto; }
  .immersive-page .immersive-nav-dialog__links a { display: flex; width: 100%; min-height: 52px; align-items: center; justify-content: flex-start; border-bottom: 2px solid rgba(255, 255, 255, .32); color: var(--paper); font-size: clamp(1.2rem, 5vw, 1.8rem); }
  .immersive-page .immersive-nav-dialog__links a::after { display: none; }
  .immersive-page .immersive-nav-dialog__links a.is-active { background: var(--blue); color: var(--paper); padding-inline: 10px; }
  .immersive-page .immersive-nav-backdrop { position: absolute; z-index: 0; inset: 0; display: block; width: 100%; height: 100%; border: 0; background: transparent; }
  .immersive-page .immersive-nav-toggle { display: inline-grid; position: relative; z-index: 2; width: 48px; min-width: 48px; height: 48px; min-height: 48px; align-content: center; justify-items: center; gap: 5px; border: 3px solid var(--ink); background: var(--paper); cursor: pointer; }
  .immersive-page .immersive-nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
  .immersive-page .immersive-nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(7px) rotate(45deg); }
  .immersive-page .immersive-nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .immersive-page .immersive-nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-7px) rotate(-45deg); }
  .immersive-page .route-node { transform: translateX(-10px) rotate(-4deg); }
  .immersive-page .immersive-addition { width: min(calc(100% - 28px), 640px); min-height: auto; padding: 100px 14px 110px 50px; }
  .immersive-page #proof.chapter-proof {
    grid-template-areas:
      "intro"
      "visual"
      "metrics";
    grid-template-columns: 1fr;
    gap: 58px;
    min-height: auto;
    padding-block: 110px 130px;
  }
  .immersive-page .immersive-proof__visual { width: calc(100% - 10px); box-shadow: 9px 9px 0 var(--pink); transform: rotate(-.5deg); }
  .immersive-page .immersive-proof__visual figcaption { max-width: 86%; padding: 10px 12px; }
  .immersive-page #proof .measurement-strip { grid-template-columns: 1fr; }
  .immersive-page #proof .measurement-strip div { border-right: 0; border-bottom: 4px solid var(--ink); }
  .immersive-page #proof .measurement-strip div:last-child { border-bottom: 0; }
  .immersive-page :is(
    #features-title,
    #concept-title,
    #offering-title,
    #artists-title,
    #story-title,
    #sound-title,
    #backstage-title,
    #visit-title,
    #proof-title,
    #faq-title,
    #cta-title
  ) { max-width: 100%; font-size: clamp(1.5rem, 6.2vw, 2.1rem); line-height: 1.08; }
  .immersive-page .immersive-addition__heading h2 > span { max-width: 100%; white-space: nowrap; }
  .immersive-page .immersive-addition__heading > p:last-child { font-size: .76rem; line-height: 1.8; }
  .immersive-page .immersive-concept { padding-top: 122px; }
  .immersive-page .immersive-concept .immersive-addition__grid,
  .immersive-page .immersive-sound__layout,
  .immersive-page .immersive-backstage__desk,
  .immersive-page .immersive-visit,
  .immersive-page .immersive-faq__panel { grid-template-columns: 1fr; gap: 58px; }
  .immersive-page .immersive-concept .immersive-addition__grid { min-height: auto; }
  .immersive-page .immersive-concept__gate { top: 16%; right: 5%; width: 26vw; height: 48%; opacity: .72; }
  .immersive-page .immersive-concept::before { right: -25%; width: 64vw; height: 52%; }
  .immersive-page .immersive-concept__art { width: calc(100% - 12px); justify-self: start; margin-top: 12px; box-shadow: 9px 9px 0 var(--pink); }
  .immersive-page .immersive-concept__note { position: relative; right: auto; bottom: auto; width: calc(100% - 10px); margin: 70px 0 0 4px; }
  .immersive-page .immersive-artists__wall { min-height: 780px; margin-top: 124px; }
  .immersive-page .immersive-artists__poster { left: 2%; width: calc(100% - 18px); box-shadow: 9px 9px 0 var(--blue); }
  .immersive-page .immersive-artists__poster::before { top: -80px; height: 80px; }
  .immersive-page .immersive-artists__profile { width: calc(100% - 32px); padding: 20px; }
  .immersive-page .immersive-artists__profile--one { top: 43%; right: 0; }
  .immersive-page .immersive-artists__profile--two { right: 8%; bottom: 0; }
  .immersive-page .immersive-sound__meter { width: min(100%, 330px); min-height: 270px; margin-inline: auto; box-shadow: 9px 9px 0 var(--blue); }
  .immersive-page .immersive-backstage__desk { margin-top: 58px; }
  .immersive-page .immersive-backstage__art { box-shadow: 9px 9px 0 var(--yellow); }
  .immersive-page .immersive-backstage__cues { box-shadow: 9px 9px 0 var(--pink); }
  .immersive-page .immersive-visit__map { min-height: 420px; padding: 24px 16px; box-shadow: 9px 9px 0 var(--pink); }
  .immersive-page .immersive-visit__map figure { width: 86%; }
  .immersive-page .immersive-visit__route { inset: 16% 11% 18%; }
  .immersive-page .immersive-visit__ticket { width: calc(100% - 10px); margin-left: 4px; box-shadow: 9px 9px 0 var(--yellow); }
  .immersive-page .immersive-faq__list { box-shadow: 9px 9px 0 var(--blue); }
  .immersive-page .immersive-faq__list summary { grid-template-columns: 44px 1fr auto; gap: 10px; padding-inline: 12px; font-size: .96rem; }
  .immersive-page .immersive-faq__list details p { padding: 14px 16px 18px 66px; font-size: .72rem; }
}

@media (max-width: 480px) {
  .immersive-page .template-nav__links { display: none; }
  .immersive-page .template-nav__links[aria-hidden="false"] { display: grid !important; }
  .immersive-page .entrance h1 { font-size: clamp(2.5rem, 12.8vw, 3.3rem); }
  .immersive-page .immersive-addition__heading h2 { font-size: clamp(1.5rem, 6.2vw, 2.1rem); }
  .immersive-page .immersive-concept__gate { right: 2%; width: 31vw; }
  .immersive-page .immersive-artists__wall { min-height: 750px; }
  .immersive-page .immersive-artists__profile h3 { font-size: 1.9rem; }
  .immersive-page .immersive-backstage__cues li { grid-template-columns: 56px 1fr; gap: 10px; padding: 20px 14px; }
  .immersive-page .immersive-backstage__cues b { font-size: 1.18rem; }
  .immersive-page .immersive-backstage__cues small { font-size: .64rem; }
  .immersive-page .immersive-visit__map { min-height: 350px; }
  .immersive-page .immersive-visit__pin { padding: 5px 7px; font-size: .58rem; }
}

/* Keep added chapters on the same route and copy baseline as the originals. */
@media (max-width: 900px) {
  .immersive-page .immersive-addition {
    width: min(100% - 28px, 1360px);
  }

  .immersive-page .route-node {
    width: 44px;
    box-shadow: 5px 5px 0 var(--ink);
    font-size: 1.1rem;
    transform: translateX(-21px) rotate(-3deg);
  }

  .immersive-page #cta-title {
    left: 30px;
  }

  .immersive-page #cta .exit-sign::before {
    inset: -38px calc(100% - 8px) auto auto;
    width: 90px;
    height: 90px;
  }

  .immersive-page :is(
    #features-title,
    #concept-title,
    #offering-title,
    #artists-title,
    #story-title,
    #sound-title,
    #backstage-title,
    #visit-title,
    #proof-title,
    #faq-title,
    #cta-title
  )::before {
    top: 0;
    left: -60px;
    width: 44px;
    box-shadow: 5px 5px 0 var(--ink);
    font-size: 1.1rem;
    transform: rotate(-3deg);
  }
}

@media (min-width: 801px) {
  .immersive-page .immersive-addition {
    width: min(100% - 48px, 1360px);
    padding-right: 5vw;
    padding-left: 10vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .immersive-page .immersive-addition *,
  .immersive-page .immersive-addition *::before,
  .immersive-page .immersive-addition *::after {
    animation: none !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
  .immersive-page .immersive-addition [data-reveal],
  .immersive-page .immersive-addition [data-reveal].is-visible { opacity: 1 !important; clip-path: inset(0) !important; filter: none !important; transform: none !important; }
  .immersive-page .entrance::before,
  .immersive-page .entrance::after,
  .immersive-page .scroll-cue span { animation: none !important; transform: none !important; }
  .immersive-page .entrance::before { transform: translateX(-102%) !important; }
  .immersive-page .entrance::after { transform: translateX(102%) !important; }
  .immersive-page .route-progress { display: none; }
  .immersive-page .immersive-proof__visual img,
  .immersive-page .immersive-proof__visual::after { animation: none !important; }
}